nft.c revision aa1601423175c90c37c3e6a3d6975d3e2eb74d1e
1384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso/* 2384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org> 3384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * 4384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * This program is free software; you can redistribute it and/or modify 5384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * it under the terms of the GNU General Public License as published 6384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * by the Free Software Foundation; either version 2 of the License, or 7384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * (at your option) any later version. 8384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * 9384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * This code has been sponsored by Sophos Astaro <http://www.sophos.com> 10384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso */ 11384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 12384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <unistd.h> 13384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <fcntl.h> 14384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <sys/types.h> 15384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <sys/socket.h> 16384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <stdbool.h> 17384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <errno.h> 18384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <netdb.h> /* getprotobynumber */ 19384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <time.h> 208b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso#include <stdarg.h> 21384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 22384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <xtables.h> 23384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <libiptc/libxtc.h> 24384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <libiptc/xtcshared.h> 25384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 26384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <stdlib.h> 27384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <string.h> 28384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 29384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <linux/netfilter/x_tables.h> 300391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka#include <linux/netfilter_ipv4/ip_tables.h> 310391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka#include <linux/netfilter_ipv6/ip6_tables.h> 320391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka#include <netinet/ip6.h> 33384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 34384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <linux/netlink.h> 35384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <linux/netfilter/nfnetlink.h> 36384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <linux/netfilter/nf_tables.h> 37384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <linux/netfilter/nf_tables_compat.h> 38384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 39384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <libmnl/libmnl.h> 40384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <libnftables/table.h> 41384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <libnftables/chain.h> 42384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <libnftables/rule.h> 43384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <libnftables/expr.h> 44384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 45384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <netinet/in.h> /* inet_ntoa */ 46384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include <arpa/inet.h> 47384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 48384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include "nft.h" 49384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#include "xshared.h" /* proto_to_name */ 50077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka#include "nft-shared.h" 518b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso#include "xtables-config-parser.h" 52384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 53384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void *nft_fn; 54384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 55384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int mnl_talk(struct nft_handle *h, struct nlmsghdr *nlh, 56384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int (*cb)(const struct nlmsghdr *nlh, void *data), 57384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso void *data) 58384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 59384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 60384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 61384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 62384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (mnl_socket_sendto(h->nl, nlh, nlh->nlmsg_len) < 0) { 63384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_socket_send"); 64384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return -1; 65384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 66384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 67384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_socket_recvfrom(h->nl, buf, sizeof(buf)); 68384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (ret > 0) { 69384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_cb_run(buf, ret, h->seq, h->portid, cb, data); 70384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret <= 0) 71384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 72384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 73384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_socket_recvfrom(h->nl, buf, sizeof(buf)); 74384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 75384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret == -1) { 76384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return -1; 77384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 78384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 79384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 80384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 81384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 82384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#define FILTER 0 83384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#define MANGLE 1 84384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#define RAW 2 85384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#define SECURITY 3 86890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso#define NAT 4 87890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso#define TABLES_MAX 5 88384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 89e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayusostruct builtin_chain { 90e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso const char *name; 91890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso const char *type; 925b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso uint32_t prio; 93e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso uint32_t hook; 94e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso}; 95e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso 96c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusostatic struct builtin_table { 97384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name; 98e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso struct builtin_chain chains[NF_INET_NUMHOOKS]; 99384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} tables[TABLES_MAX] = { 100384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso [RAW] = { 101384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso .name = "raw", 102e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .chains = { 103e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 104e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "PREROUTING", 105890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1065b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = -300, /* NF_IP_PRI_RAW */ 107e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_PRE_ROUTING, 108e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 109e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 110e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "OUTPUT", 111890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1125b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = -300, /* NF_IP_PRI_RAW */ 113e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_LOCAL_OUT, 114e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 115e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 116384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso }, 117384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso [MANGLE] = { 118384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso .name = "mangle", 119e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .chains = { 120e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 121e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "PREROUTING", 122890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1235b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = -150, /* NF_IP_PRI_MANGLE */ 124e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_PRE_ROUTING, 125e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 126e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 127e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "INPUT", 128890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1295b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = -150, /* NF_IP_PRI_MANGLE */ 130e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_LOCAL_IN, 131e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 132e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 133e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "FORWARD", 134890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1355b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = -150, /* NF_IP_PRI_MANGLE */ 136e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_FORWARD, 137e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 138e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 139e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "OUTPUT", 140890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "route", 1415b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = -150, /* NF_IP_PRI_MANGLE */ 142e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_LOCAL_OUT, 143e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 144e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 145e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "POSTROUTING", 146890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1475b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = -150, /* NF_IP_PRI_MANGLE */ 148e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_POST_ROUTING, 149e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 150e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 151384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso }, 152384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso [FILTER] = { 153384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso .name = "filter", 154e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .chains = { 155e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 156e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "INPUT", 157890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1585b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = 0, /* NF_IP_PRI_FILTER */ 159e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_LOCAL_IN, 160e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 161e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 162e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "FORWARD", 163890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1645b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = 0, /* NF_IP_PRI_FILTER */ 165e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_FORWARD, 166e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 167e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 168e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "OUTPUT", 169890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1705b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = 0, /* NF_IP_PRI_FILTER */ 171e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_LOCAL_OUT, 172e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 173e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 174384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso }, 175384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso [SECURITY] = { 176384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso .name = "security", 177e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .chains = { 178e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 179e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "INPUT", 180890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1815b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = 150, /* NF_IP_PRI_SECURITY */ 182e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_LOCAL_IN, 183e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 184e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 185e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "FORWARD", 186890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1875b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = 150, /* NF_IP_PRI_SECURITY */ 188e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_FORWARD, 189e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 190e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso { 191e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .name = "OUTPUT", 192890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "filter", 1935b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso .prio = 150, /* NF_IP_PRI_SECURITY */ 194e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso .hook = NF_INET_LOCAL_OUT, 195e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso }, 196384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso }, 197384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso }, 198890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso [NAT] = { 199890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .name = "nat", 200890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .chains = { 201890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso { 202890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .name = "OUTPUT", 203890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "nat", 204890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .prio = -100, /* NF_IP_PRI_NAT_DST */ 205890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .hook = NF_INET_LOCAL_OUT, 206890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso }, 207890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso { 208890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .name = "INPUT", 209890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "nat", 210890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .prio = 100, /* NF_IP_PRI_NAT_SRC */ 211890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .hook = NF_INET_LOCAL_IN, 212890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso }, 213890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso { 214890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .name = "PREROUTING", 215890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "nat", 216890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .prio = -100, /* NF_IP_PRI_NAT_DST */ 217890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .hook = NF_INET_PRE_ROUTING, 218890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso }, 219890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso { 220890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .name = "POSTROUTING", 221890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .type = "nat", 222890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .prio = 100, /* NF_IP_PRI_NAT_SRC */ 223890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso .hook = NF_INET_POST_ROUTING, 224890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso }, 225890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso }, 226890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso }, 227384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso}; 228384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2295705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayusostatic int 2305705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayusonft_table_builtin_add(struct nft_handle *h, struct builtin_table *_t, 2315705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso bool dormant) 2325b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso{ 2335b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 2345b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso struct nlmsghdr *nlh; 2355b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso struct nft_table *t; 2365b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso int ret; 2375b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso 2385b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso t = nft_table_alloc(); 2395b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso if (t == NULL) 2405b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso return -1; 2415b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso 2425b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso nft_table_attr_set(t, NFT_TABLE_ATTR_NAME, (char *)_t->name); 2435705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso if (dormant) { 2445705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso nft_table_attr_set_u32(t, NFT_TABLE_ATTR_FLAGS, 2455705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso NFT_TABLE_F_DORMANT); 2465705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso } 2475b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso 2480391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_table_nlmsg_build_hdr(buf, NFT_MSG_NEWTABLE, h->family, 2495b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso NLM_F_ACK|NLM_F_EXCL, h->seq); 2505b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso nft_table_nlmsg_build_payload(nlh, t); 2515b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso nft_table_free(t); 2525b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso 2535b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso ret = mnl_talk(h, nlh, NULL, NULL); 2545b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso if (ret < 0) { 2555b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso if (errno != EEXIST) 2565b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso perror("mnl-talk:nft_table_init_one"); 2575b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso } 2585b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso return ret; 2595b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso} 2605b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso 261c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusostatic struct nft_chain * 262c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusonft_chain_builtin_alloc(struct builtin_table *table, 263c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso struct builtin_chain *chain, int policy) 264384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 265384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 266384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 267384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_alloc(); 268384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (c == NULL) 269c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso return NULL; 270384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 271384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_TABLE, (char *)table->name); 272384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_NAME, (char *)chain->name); 273384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_HOOKNUM, chain->hook); 2745b414b85c33912aec912d260502c8b0c0df794a1Pablo Neira Ayuso nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_PRIO, chain->prio); 275384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_POLICY, policy); 276890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_TYPE, (char *)chain->type); 277384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 278c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso return c; 279c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso} 280c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 281c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusostatic void 282c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusonft_chain_builtin_add(struct nft_handle *h, struct builtin_table *table, 283c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso struct builtin_chain *chain, int policy) 284c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso{ 285c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 286c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso struct nlmsghdr *nlh; 287c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso struct nft_chain *c; 288c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 289c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso c = nft_chain_builtin_alloc(table, chain, policy); 290c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso if (c == NULL) 291c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso return; 292c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 293890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso /* NLM_F_CREATE requests module autoloading */ 2940391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_NEWCHAIN, h->family, 295890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso NLM_F_ACK|NLM_F_EXCL|NLM_F_CREATE, 296890fd9ef76ad0c11695fb0d09a88169e6e46584fPablo Neira Ayuso h->seq); 297384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_nlmsg_build_payload(nlh, c); 298384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_free(c); 299384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 300384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (mnl_talk(h, nlh, NULL, NULL) < 0) { 301384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (errno != EEXIST) 302c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso perror("mnl_talk:nft_chain_builtin_add"); 303c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso } 304c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso} 305c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 306c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso/* find if built-in table already exists */ 307c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusostatic struct builtin_table *nft_table_builtin_find(const char *table) 308c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso{ 309c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso int i; 310c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso bool found = false; 311c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 312c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso for (i=0; i<TABLES_MAX; i++) { 313c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso if (strcmp(tables[i].name, table) != 0) 314c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso continue; 315c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 316c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso found = true; 317c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso break; 318384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 319c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 320c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso return found ? &tables[i] : NULL; 321384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 322384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 323c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso/* find if built-in chain already exists */ 324c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusostatic struct builtin_chain * 325e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayusonft_chain_builtin_find(struct builtin_table *t, const char *chain) 326384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 327e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso int i; 328c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso bool found = false; 329384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 330e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso for (i=0; i<NF_IP_NUMHOOKS && t->chains[i].name != NULL; i++) { 331e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso if (strcmp(t->chains[i].name, chain) != 0) 332e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso continue; 333384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 334e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso found = true; 335e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso break; 336e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso } 337e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso return found ? &t->chains[i] : NULL; 338e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso} 339e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso 340e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayusostatic void 341e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso__nft_chain_builtin_init(struct nft_handle *h, 342e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso struct builtin_table *table, const char *chain, 343e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso int policy) 344e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso{ 345e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso int i, default_policy; 346e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso 347e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso /* Initialize all built-in chains. Exception, for e one received as 348e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso * parameter, set the default policy as requested. 349e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso */ 350e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso for (i=0; i<NF_IP_NUMHOOKS && table->chains[i].name != NULL; i++) { 351e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso if (chain && strcmp(table->chains[i].name, chain) == 0) 352e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso default_policy = policy; 353e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso else 354e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso default_policy = NF_ACCEPT; 355e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso 356e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso nft_chain_builtin_add(h, table, &table->chains[i], 357e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso default_policy); 358384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 359c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso} 360c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 361c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusostatic int 362c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusonft_chain_builtin_init(struct nft_handle *h, const char *table, 363c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso const char *chain, int policy) 364c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso{ 365c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso int ret = 0; 366c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso struct builtin_table *t; 367c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 368c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso t = nft_table_builtin_find(table); 369c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso if (t == NULL) { 370c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso ret = -1; 371c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso goto out; 372c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso } 3735705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso if (nft_table_builtin_add(h, t, false) < 0) { 374e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso /* Built-in table already initialized, skip. */ 375e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso if (errno == EEXIST) 376e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso goto out; 377c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso } 378e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso __nft_chain_builtin_init(h, t, chain, policy); 379c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayusoout: 380c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso return ret; 381384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 382384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 383384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_init(struct nft_handle *h) 384384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 385384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso h->nl = mnl_socket_open(NETLINK_NETFILTER); 386384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (h->nl == NULL) { 387384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_socket_open"); 388384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return -1; 389384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 390384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 391384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (mnl_socket_bind(h->nl, 0, MNL_SOCKET_AUTOPID) < 0) { 392384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_socket_bind"); 393384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return -1; 394384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 395384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso h->portid = mnl_socket_get_portid(h->nl); 396384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 397384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 398384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 399384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 400384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusovoid nft_fini(struct nft_handle *h) 401384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 402384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mnl_socket_close(h->nl); 403384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 404384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 405384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_table_add(struct nft_handle *h, const struct nft_table *t) 406384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 407384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 408384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 409384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 4100391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_table_nlmsg_build_hdr(buf, NFT_MSG_NEWTABLE, h->family, 411384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_ACK|NLM_F_EXCL, h->seq); 412384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_table_nlmsg_build_payload(nlh, t); 413384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 414384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return mnl_talk(h, nlh, NULL, NULL); 415384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 416384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 417384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_chain_add(struct nft_handle *h, const struct nft_chain *c) 418384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 419384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 420384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 421384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 4220391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_NEWCHAIN, h->family, 423384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_ACK|NLM_F_EXCL, h->seq); 424384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_nlmsg_build_payload(nlh, c); 425384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 426384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return mnl_talk(h, nlh, NULL, NULL); 427384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 428384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 4295705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayusoint nft_table_set_dormant(struct nft_handle *h, const char *table) 4305705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso{ 4315705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso int ret = 0, i; 4325705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso struct builtin_table *t; 4335705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso 4345705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso t = nft_table_builtin_find(table); 4355705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso if (t == NULL) { 4365705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso ret = -1; 4375705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso goto out; 4385705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso } 4395705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso /* Add this table as dormant */ 4405705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso if (nft_table_builtin_add(h, t, true) < 0) { 4415705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso /* Built-in table already initialized, skip. */ 4425705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso if (errno == EEXIST) 4435705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso goto out; 4445705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso } 4455705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso for (i=0; t->chains[i].name != NULL && i<NF_INET_NUMHOOKS; i++) 4465705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso __nft_chain_builtin_init(h, t, t->chains[i].name, NF_ACCEPT); 4475705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayusoout: 4485705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso return ret; 4495705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso} 4505705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso 4515705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayusoint nft_table_wake_dormant(struct nft_handle *h, const char *table) 4525705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso{ 4535705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 4545705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso struct nlmsghdr *nlh; 4555705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso struct nft_table *t; 4565705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso 4575705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso t = nft_table_alloc(); 4585705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso if (t == NULL) 4595705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso return -1; 4605705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso 4615705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso nft_table_attr_set(t, NFT_TABLE_ATTR_NAME, (char *)table); 4625705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso nft_table_attr_set_u32(t, NFT_TABLE_ATTR_FLAGS, 0); 4635705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso 4640391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_table_nlmsg_build_hdr(buf, NFT_MSG_NEWTABLE, h->family, 4655705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso NLM_F_ACK, h->seq); 4665705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso nft_table_nlmsg_build_payload(nlh, t); 4675705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso nft_table_free(t); 4685705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso 4695705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso return mnl_talk(h, nlh, NULL, NULL); 4705705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso} 4715705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso 472384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void nft_chain_print_debug(struct nft_chain *c, struct nlmsghdr *nlh) 473384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 474384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#ifdef NLDEBUG 475384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char tmp[1024]; 476384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 477384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_snprintf(tmp, sizeof(tmp), c, 0, 0); 478384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("DEBUG: chain: %s", tmp); 479384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len, sizeof(struct nfgenmsg)); 480384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#endif 481384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 482384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 483384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int 484384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso__nft_chain_set(struct nft_handle *h, const char *table, 485384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain, int policy, 486384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xt_counters *counters) 487384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 488384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 489384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 490384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 491c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso struct builtin_table *_t; 492c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso struct builtin_chain *_c; 493e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso int ret; 494c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 495c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso _t = nft_table_builtin_find(table); 496c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso /* if this built-in table does not exists, create it */ 497c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso if (_t != NULL) 4985705ea1f4e3c9cd3d5d9cbcf84b9733ce1f07e57Pablo Neira Ayuso nft_table_builtin_add(h, _t, false); 499c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 500e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso _c = nft_chain_builtin_find(_t, chain); 501c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso if (_c != NULL) { 502c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso /* This is a built-in chain */ 503c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso c = nft_chain_builtin_alloc(_t, _c, policy); 504c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso if (c == NULL) 505c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso return -1; 506c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 507c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso } else { 508c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso /* This is a custom chain */ 509c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso c = nft_chain_alloc(); 510c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso if (c == NULL) 511c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso return -1; 512c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 513c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_TABLE, (char *)table); 514c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_NAME, (char *)chain); 515c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_POLICY, policy); 516c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso } 517384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 518384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (counters) { 519384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set_u64(c, NFT_CHAIN_ATTR_BYTES, 520384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso counters->bcnt); 521384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set_u64(c, NFT_CHAIN_ATTR_PACKETS, 522384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso counters->pcnt); 523384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 524384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 5250391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_NEWCHAIN, h->family, 526384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_ACK, h->seq); 527384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_nlmsg_build_payload(nlh, c); 528384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 529384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_print_debug(c, nlh); 530384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 531384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_free(c); 532384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 533384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, NULL, NULL); 534384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) 535384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:__nft_chain_policy"); 536384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 537384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret; 538384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 539384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 540384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_chain_set(struct nft_handle *h, const char *table, 541384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain, const char *policy, 542384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xt_counters *counters) 543384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 544384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret = -1; 545384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 546384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_fn = nft_chain_set; 547384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 548384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(policy, "DROP") == 0) 549384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = __nft_chain_set(h, table, chain, NF_DROP, counters); 550384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else if (strcmp(policy, "ACCEPT") == 0) 551384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = __nft_chain_set(h, table, chain, NF_ACCEPT, counters); 552384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 553384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* the core expects 1 for success and 0 for error */ 554384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret == 0 ? 1 : 0; 555384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 556384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 557384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void __add_match(struct nft_rule_expr *e, struct xt_entry_match *m) 558384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 559384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso void *info; 560384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 561384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set(e, NFT_EXPR_MT_NAME, m->u.user.name, strlen(m->u.user.name)); 562384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u32(e, NFT_EXPR_MT_REV, m->u.user.revision); 563384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 564384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso info = calloc(1, m->u.match_size); 565384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (info == NULL) 566384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 567384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 568384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy(info, m->data, m->u.match_size); 569384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set(e, NFT_EXPR_MT_INFO, info, m->u.match_size - sizeof(*m)); 570384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 571384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 572384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void add_match(struct nft_rule *r, struct xt_entry_match *m) 573384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 574384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 575384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 576384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_alloc("match"); 577384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (expr == NULL) 578384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 579384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 580384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso __add_match(expr, m); 581384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_add_expr(r, expr); 582384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 583384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 584384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void __add_target(struct nft_rule_expr *e, struct xt_entry_target *t) 585384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 586384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso void *info = NULL; 587384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 588384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set(e, NFT_EXPR_TG_NAME, t->u.user.name, 589384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso strlen(t->u.user.name)); 590384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u32(e, NFT_EXPR_TG_REV, t->u.user.revision); 591384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 592384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (info == NULL) { 593384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso info = calloc(1, t->u.target_size); 594384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (info == NULL) 595384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 596384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 597384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy(info, t->data, t->u.target_size); 598384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 599384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 600384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set(e, NFT_EXPR_TG_INFO, info, t->u.target_size - sizeof(*t)); 601384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 602384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 603384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void add_target(struct nft_rule *r, struct xt_entry_target *t) 604384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 605384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 606384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 607384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_alloc("target"); 608384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (expr == NULL) 609384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 610384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 611384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso __add_target(expr, t); 612384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_add_expr(r, expr); 613384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 614384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 615384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void add_jumpto(struct nft_rule *r, const char *name, int verdict) 616384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 617384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 618384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 619384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_alloc("immediate"); 620384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (expr == NULL) 621384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 622384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 623384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u32(expr, NFT_EXPR_IMM_DREG, NFT_REG_VERDICT); 624384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u32(expr, NFT_EXPR_IMM_VERDICT, verdict); 625384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_str(expr, NFT_EXPR_IMM_CHAIN, (char *)name); 626384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_add_expr(r, expr); 627384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 628384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 629384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void add_verdict(struct nft_rule *r, int verdict) 630384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 631384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 632384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 633384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_alloc("immediate"); 634384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (expr == NULL) 635384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 636384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 637384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u32(expr, NFT_EXPR_IMM_DREG, NFT_REG_VERDICT); 638384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u32(expr, NFT_EXPR_IMM_VERDICT, verdict); 639384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_add_expr(r, expr); 640384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 641384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 642384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void nft_rule_print_debug(struct nft_rule *r, struct nlmsghdr *nlh) 643384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 644384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#ifdef NLDEBUG 645384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char tmp[1024]; 646384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 647384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_snprintf(tmp, sizeof(tmp), r, 0, 0); 648384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("DEBUG: rule: %s", tmp); 649384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mnl_nlmsg_fprintf(stdout, nlh, nlh->nlmsg_len, sizeof(struct nfgenmsg)); 650384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#endif 651384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 652384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 653384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void add_counters(struct nft_rule *r, uint64_t packets, uint64_t bytes) 654384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 655384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 656384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 657384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_alloc("counter"); 658384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (expr == NULL) 659384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 660384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 661384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u64(expr, NFT_EXPR_CTR_BYTES, packets); 662384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_set_u64(expr, NFT_EXPR_CTR_PACKETS, bytes); 663384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 664384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_add_expr(r, expr); 665384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 666384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 6674ef77b6d1b52e1fe52a7fd48d38d9233f0961640Pablo Neira Ayusovoid add_compat(struct nft_rule *r, uint32_t proto, bool inv) 6682a87a024e1f77407e332086a4fa664e048280195Pablo Neira Ayuso{ 6692a87a024e1f77407e332086a4fa664e048280195Pablo Neira Ayuso nft_rule_attr_set_u32(r, NFT_RULE_ATTR_COMPAT_PROTO, proto); 6702a87a024e1f77407e332086a4fa664e048280195Pablo Neira Ayuso nft_rule_attr_set_u32(r, NFT_RULE_ATTR_COMPAT_FLAGS, 6712a87a024e1f77407e332086a4fa664e048280195Pablo Neira Ayuso inv ? NFT_RULE_COMPAT_F_INV : 0); 6722a87a024e1f77407e332086a4fa664e048280195Pablo Neira Ayuso} 6732a87a024e1f77407e332086a4fa664e048280195Pablo Neira Ayuso 674384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint 675384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_rule_add(struct nft_handle *h, const char *chain, const char *table, 6760a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka struct iptables_command_state *cs, 6771298a1014bc14c45de50cc242779dfa382c456c9Pablo Neira Ayuso bool append, uint64_t handle, bool verbose) 678384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 679384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 680384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 681384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xtables_rule_match *matchp; 682384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule *r; 683384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret = 1; 684384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int flags = append ? NLM_F_APPEND : 0; 6850391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka int ip_flags = 0; 686384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 687e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso /* If built-in chains don't exist for this table, create them */ 6888b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (nft_xtables_config_load(h, XTABLES_CONFIG_DEFAULT, 0) < 0) 6898b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso nft_chain_builtin_init(h, table, chain, NF_ACCEPT); 690c74f398c58e7b77ca1c82a15d0b2e9eed4fb82adPablo Neira Ayuso 691384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_fn = nft_rule_add; 692384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 693384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_alloc(); 694384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (r == NULL) { 695384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = 0; 696384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 697384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 698384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 699384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_set(r, NFT_RULE_ATTR_TABLE, (char *)table); 700384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_set(r, NFT_RULE_ATTR_CHAIN, (char *)chain); 701384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 702077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka ip_flags = h->ops->add(r, cs); 703384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 704384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso for (matchp = cs->matches; matchp; matchp = matchp->next) 705384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_match(r, matchp->match->m); 706384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 707384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Counters need to me added before the target, otherwise they are 708384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * increased for each rule because of the way nf_tables works. 709384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso */ 710384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_counters(r, cs->counters.pcnt, cs->counters.bcnt); 711384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 712384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* If no target at all, add nothing (default to continue) */ 713384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (cs->target != NULL) { 714384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Standard target? */ 715384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(cs->jumpto, XTC_LABEL_ACCEPT) == 0) 716384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_verdict(r, NF_ACCEPT); 717384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else if (strcmp(cs->jumpto, XTC_LABEL_DROP) == 0) 718384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_verdict(r, NF_DROP); 719384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else if (strcmp(cs->jumpto, XTC_LABEL_RETURN) == 0) 720384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_verdict(r, NFT_RETURN); 721384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else 722384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_target(r, cs->target->t); 723384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strlen(cs->jumpto) > 0) { 724384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Not standard, then it's a go / jump to chain */ 7250391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka if (ip_flags & IPT_F_GOTO) 726384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_jumpto(r, cs->jumpto, NFT_GOTO); 727384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else 728384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso add_jumpto(r, cs->jumpto, NFT_JUMP); 729384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 730384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 731384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* NLM_F_CREATE autoloads the built-in table if it does not exists */ 7320a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka flags |= NLM_F_ACK|NLM_F_CREATE; 7330a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka 7340a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka if (handle > 0) { 7350a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka nft_rule_attr_set(r, NFT_RULE_ATTR_HANDLE, &handle); 7360a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka flags |= NLM_F_REPLACE; 7370a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka } 7380a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka 7399e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso if (h->commit) { 7409e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS, 7419e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso NFT_RULE_F_COMMIT); 7429e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso } 7430a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, 7440391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka h->family, flags, h->seq); 7450a366d8696582e979d55f6832a797d1217f4b908Tomasz Bursztyka 746384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_nlmsg_build_payload(nlh, r); 747384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 748384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_print_debug(r, nlh); 749384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 750384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_free(r); 751384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 752384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, NULL, NULL); 753384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) 754384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:nft_rule_add"); 755384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 756384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 757384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* the core expects 1 for success and 0 for error */ 758384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret == 0 ? 1 : 0; 759384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 760384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 761384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void nft_match_save(struct nft_rule_expr *expr) 762384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 763384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name; 764384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xtables_match *match; 765384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xt_entry_match *emu; 766384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const void *mtinfo; 767384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso size_t len; 768384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 769384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso name = nft_rule_expr_get_str(expr, NFT_EXPR_MT_NAME); 770384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 771384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso match = xtables_find_match(name, XTF_TRY_LOAD, NULL); 772384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (match == NULL) 773384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 774384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 775384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mtinfo = nft_rule_expr_get(expr, NFT_EXPR_MT_INFO, &len); 776384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (mtinfo == NULL) 777384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 778384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 779384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso emu = calloc(1, sizeof(struct xt_entry_match) + len); 780384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (emu == NULL) 781384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 782384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 783384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy(&emu->data, mtinfo, len); 784384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 785384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (match->alias) 786384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-m %s", match->alias(emu)); 787384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else 788384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-m %s", match->name); 789384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 790384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* FIXME missing parameter */ 791c51b85f995caebd41e6d063c8bcab513b305bcaaPablo Neira Ayuso if (match->save) 792c51b85f995caebd41e6d063c8bcab513b305bcaaPablo Neira Ayuso match->save(NULL, emu); 793384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 794384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(" "); 795384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 796384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso free(emu); 797384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 798384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 799384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void nft_target_save(struct nft_rule_expr *expr) 800384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 801384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name; 802384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xtables_target *target; 803384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xt_entry_target *emu; 804384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const void *tginfo; 805384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso size_t len; 806384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 807384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso name = nft_rule_expr_get_str(expr, NFT_EXPR_TG_NAME); 808384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 809384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Standard target not supported, we use native immediate expression */ 810384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "") == 0) { 811384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("ERROR: standard target seen, should not happen\n"); 812384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 813384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 814384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 815384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso target = xtables_find_target(name, XTF_TRY_LOAD); 816384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (target == NULL) 817384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 818384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 819384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso tginfo = nft_rule_expr_get(expr, NFT_EXPR_TG_INFO, &len); 820384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (tginfo == NULL) 821384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 822384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 823384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso emu = calloc(1, sizeof(struct xt_entry_match) + len); 824384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (emu == NULL) 825384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 826384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 827384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy(emu->data, tginfo, len); 828384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 829384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (target->alias) 830384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-j %s", target->alias(emu)); 831384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else 832384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-j %s", target->name); 833384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 834384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* FIXME missing parameter */ 835c51b85f995caebd41e6d063c8bcab513b305bcaaPablo Neira Ayuso if (target->save) 836c51b85f995caebd41e6d063c8bcab513b305bcaaPablo Neira Ayuso target->save(NULL, emu); 837384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 838384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso free(emu); 839384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 840384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 841384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void nft_immediate_save(struct nft_rule_expr *expr) 842384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 843384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t verdict; 844384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 845384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso verdict = nft_rule_expr_get_u32(expr, NFT_EXPR_IMM_VERDICT); 846384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 847384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(verdict) { 848384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_ACCEPT: 849384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-j ACCEPT"); 850384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 851384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_DROP: 852384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-j DROP"); 853384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 854384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_RETURN: 855384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-j RETURN"); 856384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 857384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_GOTO: 858384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-g %s", 859384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_EXPR_IMM_CHAIN)); 860384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 861384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_JUMP: 862384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-j %s", 863384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_EXPR_IMM_CHAIN)); 864384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 865384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 866384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 867384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 868384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 869384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_print_meta(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter) 870384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 871384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint8_t key = nft_rule_expr_get_u8(e, NFT_EXPR_META_KEY); 872384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t value; 873384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name; 874384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char ifname[IFNAMSIZ]; 875384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *ifname_ptr; 876384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso size_t len; 877384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 878384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso e = nft_rule_expr_iter_next(iter); 879384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (e == NULL) 880384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 881384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 882384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso name = nft_rule_expr_get_str(e, NFT_RULE_EXPR_ATTR_NAME); 883384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* meta should be followed by cmp */ 884384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "cmp") != 0) { 885384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("skipping no cmp after meta\n"); 886384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 887384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 888384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 889384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(key) { 890384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_META_IIF: 891384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso value = nft_rule_expr_get_u32(e, NFT_EXPR_CMP_DATA); 892384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if_indextoname(value, ifname); 893384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 894384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(nft_rule_expr_get_u8(e, NFT_EXPR_CMP_OP)) { 895384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_EQ: 896384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-i %s ", ifname); 897384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 898384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_NEQ: 899384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("! -i %s ", ifname); 900384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 901384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 902384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 903384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_META_OIF: 904384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso value = nft_rule_expr_get_u32(e, NFT_EXPR_CMP_DATA); 905384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if_indextoname(value, ifname); 906384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 907384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(nft_rule_expr_get_u8(e, NFT_EXPR_CMP_OP)) { 908384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_EQ: 909384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-o %s ", ifname); 910384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 911384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_NEQ: 912384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("! -o %s ", ifname); 913384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 914384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 915384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 916384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_META_IIFNAME: 917384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname_ptr = nft_rule_expr_get(e, NFT_EXPR_CMP_DATA, &len); 918384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy(ifname, ifname_ptr, len); 919384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname[len] = '\0'; 920384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 921384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* if this is zero, then assume this is a interface mask */ 922384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (if_nametoindex(ifname) == 0) { 923384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname[len] = '+'; 924384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname[len+1] = '\0'; 925384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 926384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 927384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(nft_rule_expr_get_u8(e, NFT_EXPR_CMP_OP)) { 928384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_EQ: 929384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-i %s ", ifname); 930384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 931384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_NEQ: 932384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("! -i %s ", ifname); 933384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 934384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 935384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 936384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_META_OIFNAME: 937384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname_ptr = nft_rule_expr_get(e, NFT_EXPR_CMP_DATA, &len); 938384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy(ifname, ifname_ptr, len); 939384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname[len] = '\0'; 940384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 941384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* if this is zero, then assume this is a interface mask */ 942384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (if_nametoindex(ifname) == 0) { 943384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname[len] = '+'; 944384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ifname[len+1] = '\0'; 945384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 946384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 947384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(nft_rule_expr_get_u8(e, NFT_EXPR_CMP_OP)) { 948384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_EQ: 949384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-o %s ", ifname); 950384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 951384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_CMP_NEQ: 952384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("! -o %s ", ifname); 953384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 954384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 955384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 956384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso default: 957384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("unknown meta key %d\n", key); 958384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 959384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 960384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 961384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 962384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 963384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_print_counters(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter, 964384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool counters) 965384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 966384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (counters) { 967384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-c %lu %lu ", 968384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_u64(e, NFT_EXPR_CTR_PACKETS), 969384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_u64(e, NFT_EXPR_CTR_BYTES)); 970384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 971384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 972384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 9731ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayusovoid 9741ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayusonft_rule_print_save(struct nft_rule *r, enum nft_rule_print type, bool counters) 975384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 976384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr_iter *iter; 977384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 9781ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso const char *chain = nft_rule_attr_get_str(r, NFT_RULE_ATTR_CHAIN); 979384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 980384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* print chain name */ 9811ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso switch(type) { 9821ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso case NFT_RULE_APPEND: 9831ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso printf("-A %s ", chain); 9841ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso break; 9851ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso case NFT_RULE_DEL: 9861ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso printf("-D %s ", chain); 9871ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso break; 9881ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso } 989384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 990384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_expr_iter_create(r); 991384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) 992384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 993384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 994384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 995384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (expr != NULL) { 996384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name = 997384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); 998384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 999384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "counter") == 0) { 1000384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_print_counters(expr, iter, counters); 1001384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "payload") == 0) { 1002077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka struct nft_family_ops *ops = nft_family_ops_lookup( 1003077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka nft_rule_attr_get_u8(r, NFT_RULE_ATTR_FAMILY)); 1004077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka ops->print_payload(expr, iter); 1005384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "meta") == 0) { 1006384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_print_meta(expr, iter); 1007384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "match") == 0) { 1008384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_match_save(expr); 1009384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "target") == 0) { 1010384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_target_save(expr); 1011384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "immediate") == 0) { 1012384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_immediate_save(expr); 1013384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1014384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1015384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1016384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1017384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1018384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("\n"); 1019384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1020384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1021384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int nft_chain_list_cb(const struct nlmsghdr *nlh, void *data) 1022384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1023384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 1024384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list *list = data; 1025384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1026384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_alloc(); 1027384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (c == NULL) { 1028384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("OOM"); 1029384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1030384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1031384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1032384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_chain_nlmsg_parse(nlh, c) < 0) { 1033384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("nft_rule_nlmsg_parse"); 1034384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto out; 1035384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1036384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1037384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_list_add(c, list); 1038384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1039384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return MNL_CB_OK; 1040384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoout: 1041384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_free(c); 1042384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 1043384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return MNL_CB_OK; 1044384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1045384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1046384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic struct nft_chain_list *nft_chain_list_get(struct nft_handle *h) 1047384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1048384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 1049384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 1050384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1051384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list *list; 1052384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1053384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_chain_list_alloc(); 1054384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 1055384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list\n"); 1056384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1057384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1058384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 10590391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_GETCHAIN, h->family, 1060384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_DUMP, h->seq); 1061384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1062384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, nft_chain_list_cb, list); 1063384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) 1064384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:nft_chain_list_get"); 1065384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1066384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return list; 1067384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1068384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1069384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostruct nft_chain_list *nft_chain_dump(struct nft_handle *h) 1070384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1071384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return nft_chain_list_get(h); 1072384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1073384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1074384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic const char *policy_name[NF_ACCEPT+1] = { 1075384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso [NF_DROP] = "DROP", 1076384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso [NF_ACCEPT] = "ACCEPT", 1077384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso}; 1078384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1079384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void nft_chain_print_save(struct nft_chain *c, bool basechain) 1080384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1081384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain = nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 1082384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint64_t pkts = nft_chain_attr_get_u64(c, NFT_CHAIN_ATTR_PACKETS); 1083384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint64_t bytes = nft_chain_attr_get_u64(c, NFT_CHAIN_ATTR_BYTES); 1084384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1085384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* print chain name */ 1086384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (basechain) { 1087384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t pol = NF_ACCEPT; 1088384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1089384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* no default chain policy? don't crash, display accept */ 1090384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_chain_attr_get(c, NFT_CHAIN_ATTR_POLICY)) 1091384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso pol = nft_chain_attr_get_u32(c, NFT_CHAIN_ATTR_POLICY); 1092384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1093384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(":%s %s [%lu:%lu]\n", chain, policy_name[pol], 1094384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso pkts, bytes); 1095384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else 1096384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(":%s - [%lu:%lu]\n", chain, pkts, bytes); 1097384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1098384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1099384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_chain_save(struct nft_handle *h, struct nft_chain_list *list, 1100384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *table) 1101384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1102384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list_iter *iter; 1103384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 1104384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1105384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_chain_list_iter_create(list); 1106384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1107384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1108384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1109384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1110384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1111384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 1112384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (c != NULL) { 1113384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_table = 1114384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_TABLE); 1115384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool basechain = false; 1116384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1117384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, chain_table) != 0) 1118384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 1119384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1120384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_chain_attr_get(c, NFT_CHAIN_ATTR_HOOKNUM)) 1121384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso basechain = true; 1122384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1123384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_print_save(c, basechain); 1124384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 1125384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 1126384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1127384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1128384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_list_free(list); 1129384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1130384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 1131384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1132384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1133384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int nft_rule_list_cb(const struct nlmsghdr *nlh, void *data) 1134384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1135384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule *r; 1136384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_list *list = data; 1137384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1138384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_alloc(); 1139384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (r == NULL) { 1140384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("OOM"); 1141384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1142384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1143384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1144384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_rule_nlmsg_parse(nlh, r) < 0) { 1145384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("nft_rule_nlmsg_parse"); 1146384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto out; 1147384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1148384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1149384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_list_add(r, list); 1150384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1151384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return MNL_CB_OK; 1152384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoout: 1153384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_free(r); 1154384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 1155384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return MNL_CB_OK; 1156384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1157384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1158384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic struct nft_rule_list *nft_rule_list_get(struct nft_handle *h) 1159384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1160384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 1161384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 1162384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_list *list; 1163384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1164384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1165384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_rule_list_alloc(); 1166384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 1167384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list\n"); 1168384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1169384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1170384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 11710391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_GETRULE, h->family, 1172384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_DUMP, h->seq); 1173384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1174384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, nft_rule_list_cb, list); 1175384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) { 1176384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:nft_rule_save"); 1177384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_list_free(list); 1178384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return NULL; 1179384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1180384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1181384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return list; 1182384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1183384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1184384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_save(struct nft_handle *h, const char *table, bool counters) 1185384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1186384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_list *list; 1187384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_list_iter *iter; 1188384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule *r; 1189384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1190384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_rule_list_get(h); 1191384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 1192384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot retrieve rule list from kernel\n"); 1193384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1194384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1195384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1196384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_list_iter_create(list); 1197384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1198384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1199384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1200384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1201384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1202384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_list_iter_next(iter); 1203384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (r != NULL) { 1204384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *rule_table = 1205384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_get_str(r, NFT_RULE_ATTR_TABLE); 1206384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1207384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, rule_table) != 0) 1208384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 1209384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 12101ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso nft_rule_print_save(r, NFT_RULE_APPEND, counters); 1211384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1212384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 1213384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_list_iter_next(iter); 1214384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1215384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1216384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_list_free(list); 1217384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1218384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* the core expects 1 for success and 0 for error */ 1219384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 1220384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1221384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1222384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 1223384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso__nft_rule_flush(struct nft_handle *h, const char *table, const char *chain) 1224384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1225384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 1226384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 1227384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule *r; 1228384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1229384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_alloc(); 1230384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (r == NULL) 1231384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1232384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1233384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_set(r, NFT_RULE_ATTR_TABLE, (char *)table); 1234384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_set(r, NFT_RULE_ATTR_CHAIN, (char *)chain); 1235384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 12369e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso if (h->commit) { 12379e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS, 12389e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso NFT_RULE_F_COMMIT); 12399e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso } 12409e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso 1241384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Delete all rules in this table + chain */ 12420391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_DELRULE, h->family, 1243384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_ACK, h->seq); 1244384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_nlmsg_build_payload(nlh, r); 1245384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_free(r); 1246384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1247384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (mnl_talk(h, nlh, NULL, NULL) < 0) { 1248384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (errno != EEXIST) 1249384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:__nft_rule_flush"); 1250384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1251384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1252384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1253384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_flush(struct nft_handle *h, const char *chain, const char *table) 1254384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1255384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1256384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list *list; 1257384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list_iter *iter; 1258384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 1259384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1260384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_fn = nft_rule_flush; 1261384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1262384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_chain_list_get(h); 1263384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 1264384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = 0; 1265384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1266384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1267384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1268384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_chain_list_iter_create(list); 1269384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1270384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1271384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1272384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1273384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1274384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 1275384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (c != NULL) { 1276384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *table_name = 1277384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_TABLE); 1278384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_name = 1279384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 1280384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1281384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, table_name) != 0) 1282384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 1283384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1284384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (chain != NULL && strcmp(chain, chain_name) != 0) 1285384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 1286384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1287384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso __nft_rule_flush(h, table_name, chain_name); 1288384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1289384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 1290384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 1291384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1292384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1293384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 1294384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_list_free(list); 1295384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1296384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* the core expects 1 for success and 0 for error */ 1297384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret == 0 ? 1 : 0; 1298384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1299384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1300384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_chain_user_add(struct nft_handle *h, const char *chain, const char *table) 1301384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1302384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 1303384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 1304384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 1305384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1306384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1307e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso /* If built-in chains don't exist for this table, create them */ 13088b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (nft_xtables_config_load(h, XTABLES_CONFIG_DEFAULT, 0) < 0) 13098b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso nft_chain_builtin_init(h, table, NULL, NF_ACCEPT); 1310e17b5f15c2beda86565a8f4e55fdf12ceb20dd59Pablo Neira Ayuso 1311384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_alloc(); 1312384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (c == NULL) { 1313384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate chain\n"); 1314384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return -1; 1315384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1316384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1317384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_TABLE, (char *)table); 1318384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_NAME, (char *)chain); 1319384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 13200391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_NEWCHAIN, h->family, 1321384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_ACK|NLM_F_EXCL, h->seq); 1322384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_nlmsg_build_payload(nlh, c); 1323384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_free(c); 1324384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1325384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, NULL, NULL); 1326384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) { 1327384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (errno != EEXIST) 1328384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:nft_chain_add"); 1329384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1330384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1331384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* the core expects 1 for success and 0 for error */ 1332384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret == 0 ? 1 : 0; 1333384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1334384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1335384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int __nft_chain_del(struct nft_handle *h, struct nft_chain *c) 1336384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1337384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 1338384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 1339384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1340384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 13410391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_DELCHAIN, h->family, 1342384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_ACK, h->seq); 1343384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_nlmsg_build_payload(nlh, c); 1344384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1345384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, NULL, NULL); 1346384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) { 1347384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (errno != EEXIST && errno != ENOENT) 1348384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:__nft_chain_del"); 1349384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1350384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1351384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret; 1352384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1353384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1354384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic bool nft_chain_builtin(struct nft_chain *c) 1355384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1356384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Check if this chain has hook number, in that case is built-in. 1357384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * Should we better export the flags to user-space via nf_tables? 1358384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso */ 1359384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return nft_chain_attr_get(c, NFT_CHAIN_ATTR_HOOKNUM) != NULL; 1360384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1361384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1362384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_chain_user_del(struct nft_handle *h, const char *chain, const char *table) 1363384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1364384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list *list; 1365384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list_iter *iter; 1366384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 1367384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret = 0; 1368384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int deleted_ctr = 0; 1369384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1370384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_chain_list_get(h); 1371384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) 1372384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1373384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1374384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_chain_list_iter_create(list); 1375384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1376384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1377384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1378384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1379384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1380384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 1381384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (c != NULL) { 1382384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *table_name = 1383384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_TABLE); 1384384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_name = 1385384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 1386384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1387384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* don't delete built-in chain */ 1388384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_chain_builtin(c)) 1389384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 1390384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1391384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, table_name) != 0) 1392384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 1393384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1394384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (chain != NULL && strcmp(chain, chain_name) != 0) 1395384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 1396384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1397384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = __nft_chain_del(h, c); 1398384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) 1399384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 1400384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1401384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso deleted_ctr++; 1402384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 1403384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 1404384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1405384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1406384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 1407384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_list_free(list); 1408384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1409384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* chain not found */ 1410384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0 && deleted_ctr == 0) 1411384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso errno = ENOENT; 1412384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1413384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* the core expects 1 for success and 0 for error */ 1414384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret == 0 ? 1 : 0; 1415384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1416384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 14170aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayusostruct nft_chain * 14180aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayusonft_chain_list_find(struct nft_handle *h, struct nft_chain_list *list, 14190aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso const char *table, const char *chain) 14209c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso{ 14219c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso struct nft_chain_list_iter *iter; 14229c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso struct nft_chain *c; 14239c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso 14249c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso iter = nft_chain_list_iter_create(list); 14259c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso if (iter == NULL) { 14269c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 14279c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso return NULL; 14289c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso } 14299c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso 14309c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 14319c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso while (c != NULL) { 14329c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso const char *table_name = 14339c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_TABLE); 14349c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso const char *chain_name = 14359c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 14369c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso 14379c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso if (strcmp(table, table_name) != 0) 14389c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso goto next; 14399c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso 14409c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso if (strcmp(chain, chain_name) != 0) 14419c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso goto next; 14429c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso 14430aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso nft_chain_list_iter_destroy(iter); 14449c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso return c; 14459c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayusonext: 14469c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 14479c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso } 14480aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso nft_chain_list_iter_destroy(iter); 14499c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso return NULL; 14509c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso} 14519c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso 14520aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayusostatic struct nft_chain * 14530aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayusonft_chain_find(struct nft_handle *h, const char *table, const char *chain) 14540aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso{ 14550aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso struct nft_chain_list *list; 14560aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 14570aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso list = nft_chain_list_get(h); 14580aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso if (list == NULL) { 14590aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso DEBUGP("cannot allocate chain list\n"); 14600aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso return NULL; 14610aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso } 14620aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 14630aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso return nft_chain_list_find(h, list, table, chain); 14640aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso} 14650aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 1466384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_chain_user_rename(struct nft_handle *h,const char *chain, 1467384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *table, const char *newname) 1468384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 14694493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka char buf[MNL_SOCKET_BUFFER_SIZE]; 14704493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka struct nlmsghdr *nlh; 14714493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka struct nft_chain *c; 14729c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso uint64_t handle; 1473384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1474384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 14754493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka /* If built-in chains don't exist for this table, create them */ 14768b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (nft_xtables_config_load(h, XTABLES_CONFIG_DEFAULT, 0) < 0) 14778b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso nft_chain_builtin_init(h, table, NULL, NF_ACCEPT); 14784493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka 14799c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso /* Find the old chain to be renamed */ 14809c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso c = nft_chain_find(h, table, chain); 14819c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso if (c == NULL) { 14829c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso errno = ENOENT; 14839c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso return -1; 14849c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso } 14859c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso handle = nft_chain_attr_get_u64(c, NFT_CHAIN_ATTR_HANDLE); 14869c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso 14879c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso /* Now prepare the new name for the chain */ 14884493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka c = nft_chain_alloc(); 14894493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka if (c == NULL) { 14904493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka DEBUGP("cannot allocate chain\n"); 14914493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka return -1; 14924493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka } 14934493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka 14944493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka nft_chain_attr_set(c, NFT_CHAIN_ATTR_TABLE, (char *)table); 14959c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso nft_chain_attr_set(c, NFT_CHAIN_ATTR_NAME, (char *)newname); 14969c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso nft_chain_attr_set_u64(c, NFT_CHAIN_ATTR_HANDLE, handle); 1497384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 14980391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_NEWCHAIN, h->family, 14999c541721d318598db45986ee2fd61491fadb53d0Pablo Neira Ayuso NLM_F_ACK, h->seq); 15004493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka nft_chain_nlmsg_build_payload(nlh, c); 15014493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka nft_chain_free(c); 15024493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka 15034493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka ret = mnl_talk(h, nlh, NULL, NULL); 15044493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka if (ret < 0) { 15054493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka if (errno != EEXIST) 15064493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka perror("mnl_talk:nft_chain_rename"); 15074493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka } 15084493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka 15094493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka /* the core expects 1 for success and 0 for error */ 15104493582ccb60a443fc7efeca78edafbefc689aa3Tomasz Bursztyka return ret == 0 ? 1 : 0; 1511384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1512384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1513384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int nft_table_list_cb(const struct nlmsghdr *nlh, void *data) 1514384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1515384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table *t; 1516384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table_list *list = data; 1517384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1518384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso t = nft_table_alloc(); 1519384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (t == NULL) { 1520384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("OOM"); 1521384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1522384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1523384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1524384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_table_nlmsg_parse(nlh, t) < 0) { 1525384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("nft_rule_nlmsg_parse"); 1526384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto out; 1527384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1528384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1529384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_table_list_add(t, list); 1530384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1531384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return MNL_CB_OK; 1532384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoout: 1533384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_table_free(t); 1534384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 1535384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return MNL_CB_OK; 1536384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1537384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1538384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic struct nft_table_list *nft_table_list_get(struct nft_handle *h) 1539384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1540384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 1541384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 1542384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1543384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table_list *list; 1544384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1545384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_table_list_alloc(); 1546384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 1547384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate table list\n"); 1548384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1549384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1550384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 15510391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_GETTABLE, h->family, 1552384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_DUMP, h->seq); 1553384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1554384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, nft_table_list_cb, list); 1555384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) 1556384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:nft_table_list_get"); 1557384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1558384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return list; 1559384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1560384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1561384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusobool nft_table_find(struct nft_handle *h, const char *tablename) 1562384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1563384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table_list *list; 1564384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table_list_iter *iter; 1565384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table *t; 1566384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool ret = false; 1567384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1568384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_table_list_get(h); 1569384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) 1570384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1571384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1572384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_table_list_iter_create(list); 1573384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1574384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1575384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1576384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1577384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1578384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso t = nft_table_list_iter_next(iter); 1579384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (t != NULL) { 1580384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *this_tablename = 1581384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_table_attr_get(t, NFT_TABLE_ATTR_NAME); 1582384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1583384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(tablename, this_tablename) == 0) 1584384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return true; 1585384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1586384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso t = nft_table_list_iter_next(iter); 1587384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1588384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1589384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_table_list_free(list); 1590384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1591384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 1592384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret; 1593384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1594384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1595384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_for_each_table(struct nft_handle *h, 1596384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int (*func)(struct nft_handle *h, const char *tablename, bool counters), 1597384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool counters) 1598384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1599384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret = 1; 1600384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table_list *list; 1601384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table_list_iter *iter; 1602384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_table *t; 1603384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1604384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_table_list_get(h); 1605384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 1606384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = 0; 1607384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 1608384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1609384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1610384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_table_list_iter_create(list); 1611384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1612384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1613384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1614384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1615384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1616384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso t = nft_table_list_iter_next(iter); 1617384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (t != NULL) { 1618384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *tablename = 1619384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_table_attr_get(t, NFT_TABLE_ATTR_NAME); 1620384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1621384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso func(h, tablename, counters); 1622384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1623384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso t = nft_table_list_iter_next(iter); 1624384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1625384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1626384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_table_list_free(list); 1627384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1628384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 1629384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* the core expects 1 for success and 0 for error */ 1630384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret == 0 ? 1 : 0; 1631384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1632384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 16330aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayusoint nft_table_purge_chains(struct nft_handle *h, const char *this_table, 16340aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso struct nft_chain_list *chain_list) 16350aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso{ 16360aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso struct nft_chain_list_iter *iter; 16370aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso struct nft_chain *chain_obj; 16380aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 16390aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso iter = nft_chain_list_iter_create(chain_list); 16400aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso if (iter == NULL) { 16410aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 16420aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso return 0; 16430aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso } 16440aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 16450aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso chain_obj = nft_chain_list_iter_next(iter); 16460aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso while (chain_obj != NULL) { 16470aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso const char *table = 16480aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso nft_chain_attr_get_str(chain_obj, NFT_CHAIN_ATTR_TABLE); 16490aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 16500aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso if (strcmp(this_table, table) != 0) 16510aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso goto next; 16520aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 16530aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso if (nft_chain_builtin(chain_obj)) 16540aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso goto next; 16550aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 16560aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso if ( __nft_chain_del(h, chain_obj) < 0) { 16570aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso if (errno != EBUSY) 16580aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso return -1; 16590aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso } 16600aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayusonext: 16610aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso chain_obj = nft_chain_list_iter_next(iter); 16620aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso } 16630aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso nft_chain_list_iter_destroy(iter); 16640aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 16650aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso return 0; 16660aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso} 16670aad20f3979e3b6becd40e4ed5bba8d09d90706ePablo Neira Ayuso 1668384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic inline int 1669384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusomatch_different(const struct xt_entry_match *a, 1670384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const unsigned char *a_elems, 1671384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const unsigned char *b_elems, 1672384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso unsigned char **maskptr) 1673384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1674384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xt_entry_match *b; 1675384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso unsigned int i; 1676384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1677384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Offset of b is the same as a. */ 1678384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso b = (void *)b_elems + ((unsigned char *)a - a_elems); 1679384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1680384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (a->u.match_size != b->u.match_size) 1681384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 1682384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1683384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(a->u.user.name, b->u.user.name) != 0) 1684384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 1685384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1686384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso *maskptr += XT_ALIGN(sizeof(*a)); 1687384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1688384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso for (i = 0; i < a->u.match_size - XT_ALIGN(sizeof(*a)); i++) 1689384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (((a->data[i] ^ b->data[i]) & (*maskptr)[i]) != 0) 1690384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 1691384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso *maskptr += i; 1692384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 1693384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1694384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1695384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 1696384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_parse_meta(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter, 16970391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka int family, struct iptables_command_state *cs) 1698384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1699384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint8_t key = nft_rule_expr_get_u8(e, NFT_EXPR_META_KEY); 1700077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka struct nft_family_ops *ops = nft_family_ops_lookup(family); 1701384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name; 1702384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1703384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso e = nft_rule_expr_iter_next(iter); 1704384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (e == NULL) 1705384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1706384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1707384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso name = nft_rule_expr_get_str(e, NFT_RULE_EXPR_ATTR_NAME); 1708384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "cmp") != 0) { 1709384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("skipping no cmp after meta\n"); 1710384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1711384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1712384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1713077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka ops->parse_meta(e, key, cs); 17140391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka} 17150391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka 17160391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztykastatic void 17170391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztykanft_parse_payload(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter, 17180391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka int family, struct iptables_command_state *cs) 17190391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka{ 1720077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka struct nft_family_ops *ops = nft_family_ops_lookup(family); 17210391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka uint32_t offset; 17220391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka 17230391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka offset = nft_rule_expr_get_u32(e, NFT_EXPR_PAYLOAD_OFFSET); 17240391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka 1725077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka ops->parse_payload(iter, cs, offset); 17260391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka} 17270391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka 17280391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztykastatic void 1729384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_parse_counter(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter, 1730384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xt_counters *counters) 1731384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1732384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso counters->pcnt = nft_rule_expr_get_u64(e, NFT_EXPR_CTR_PACKETS); 1733384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso counters->bcnt = nft_rule_expr_get_u64(e, NFT_EXPR_CTR_BYTES); 1734384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1735384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1736384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 1737384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_parse_immediate(struct nft_rule_expr *e, struct nft_rule_expr_iter *iter, 17380391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka int family, struct iptables_command_state *cs) 1739384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1740384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int verdict = nft_rule_expr_get_u32(e, NFT_EXPR_IMM_VERDICT); 1741384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain = nft_rule_expr_get_str(e, NFT_EXPR_IMM_CHAIN); 1742077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka struct nft_family_ops *ops; 1743384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1744384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Standard target? */ 1745384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(verdict) { 1746384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_ACCEPT: 1747384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso cs->jumpto = "ACCEPT"; 1748384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1749384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_DROP: 1750384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso cs->jumpto = "DROP"; 1751384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1752384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_RETURN: 1753384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso cs->jumpto = "RETURN"; 1754384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1755384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_GOTO: 1756077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka ops = nft_family_ops_lookup(family); 1757077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka ops->parse_immediate(cs); 1758384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_JUMP: 1759384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso cs->jumpto = chain; 1760384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1761384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1762384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1763384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1764384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 1765384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_rule_to_iptables_command_state(struct nft_rule *r, 1766384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct iptables_command_state *cs) 1767384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1768384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr_iter *iter; 1769384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 17700391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka int family = nft_rule_attr_get_u8(r, NFT_RULE_ATTR_FAMILY); 1771384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1772384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_expr_iter_create(r); 1773384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) 1774384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 1775384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1776384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1777384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (expr != NULL) { 1778384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name = 1779384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); 1780384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1781384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "counter") == 0) { 1782384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_parse_counter(expr, iter, &cs->counters); 1783384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "payload") == 0) { 17840391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nft_parse_payload(expr, iter, family, cs); 1785384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "meta") == 0) { 17860391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nft_parse_meta(expr, iter, family, cs); 1787384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "immediate") == 0) { 17880391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nft_parse_immediate(expr, iter, family, cs); 1789384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1790384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1791384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1792384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1793384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1794384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_iter_destroy(iter); 1795384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1796384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1797384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int matches_howmany(struct xtables_rule_match *matches) 1798384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1799384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xtables_rule_match *matchp; 1800384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int matches_ctr = 0; 1801384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1802384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso for (matchp = matches; matchp; matchp = matchp->next) 1803384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso matches_ctr++; 1804384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1805384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return matches_ctr; 1806384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1807384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1808384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic bool 1809384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso__find_match(struct nft_rule_expr *expr, struct xtables_rule_match *matches) 1810384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1811384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *matchname = nft_rule_expr_get_str(expr, NFT_EXPR_MT_NAME); 1812384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Netlink aligns this match info, don't trust this length variable */ 1813384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *data = nft_rule_expr_get_str(expr, NFT_EXPR_MT_INFO); 1814384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xtables_rule_match *matchp; 1815384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool found = false; 1816384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1817384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso for (matchp = matches; matchp; matchp = matchp->next) { 1818384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xt_entry_match *m = matchp->match->m; 1819384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1820384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(m->u.user.name, matchname) != 0) { 1821384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("mismatching match name\n"); 1822384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso continue; 1823384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1824384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1825384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (memcmp(data, m->data, m->u.user.match_size - sizeof(*m)) != 0) { 1826384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("mismatch match data\n"); 1827384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso continue; 1828384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1829384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso found = true; 1830384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 1831384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1832384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1833384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return found; 1834384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1835384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1836384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic bool find_matches(struct xtables_rule_match *matches, struct nft_rule *r) 1837384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1838384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr_iter *iter; 1839384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 1840384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int kernel_matches = 0; 1841384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1842384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_expr_iter_create(r); 1843384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1844384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1845384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1846384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1847384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1848384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1849384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (expr != NULL) { 1850384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name = 1851384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); 1852384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1853384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "match") == 0) { 1854384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!__find_match(expr, matches)) 1855384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1856384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1857384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso kernel_matches++; 1858384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1859384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1860384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1861384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_iter_destroy(iter); 1862384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1863384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* same number of matches? */ 1864384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (matches_howmany(matches) != kernel_matches) 1865384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1866384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1867384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return true; 1868384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1869384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1870384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic bool __find_target(struct nft_rule_expr *expr, struct xt_entry_target *t) 1871384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1872384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso size_t len; 1873384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *tgname = nft_rule_expr_get_str(expr, NFT_EXPR_TG_NAME); 1874384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Netlink aligns this target info, don't trust this length variable */ 1875384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *data = nft_rule_expr_get(expr, NFT_EXPR_TG_INFO, &len); 1876384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1877384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(t->u.user.name, tgname) != 0) { 1878384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("mismatching target name\n"); 1879384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1880384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1881384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1882384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (memcmp(data, t->data, t->u.user.target_size - sizeof(*t)) != 0) 1883384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1884384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1885384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return true; 1886384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1887384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1888384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int targets_howmany(struct xtables_target *target) 1889384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1890384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return target != NULL ? 1 : 0; 1891384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1892384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1893384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic bool 1894384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusofind_target(struct xtables_target *target, struct nft_rule *r) 1895384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1896384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr_iter *iter; 1897384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 1898384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int kernel_targets = 0; 1899384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1900384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Special case: we use native immediate expressions to emulated 1901384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * standard targets. Also, we don't want to crash with no targets. 1902384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso */ 1903384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (target == NULL || strcmp(target->name, "standard") == 0) 1904384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return true; 1905384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1906384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_expr_iter_create(r); 1907384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1908384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1909384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1910384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1911384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1912384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1913384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (expr != NULL) { 1914384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name = 1915384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); 1916384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1917384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "target") == 0) { 1918384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* we may support several targets in the future */ 1919384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!__find_target(expr, target->t)) 1920384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1921384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1922384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso kernel_targets++; 1923384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1924384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1925384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1926384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_iter_destroy(iter); 1927384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1928384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* same number of targets? */ 1929384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (targets_howmany(target) != kernel_targets) { 1930384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("kernel targets is %d but we passed %d\n", 1931384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso kernel_targets, targets_howmany(target)); 1932384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1933384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1934384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1935384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return true; 1936384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1937384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1938384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic bool 1939384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusofind_immediate(struct nft_rule *r, const char *jumpto) 1940384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1941384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr_iter *iter; 1942384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 1943384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1944384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_expr_iter_create(r); 1945384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 1946384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 1947384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1948384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1949384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1950384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1951384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (expr != NULL) { 1952384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name = 1953384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); 1954384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1955384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "immediate") == 0) { 1956384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int verdict = nft_rule_expr_get_u32(expr, NFT_EXPR_IMM_VERDICT); 1957384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *verdict_name = NULL; 1958384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1959384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* No target specified but immediate shows up, this 1960384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso * is not the rule we are looking for. 1961384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso */ 1962384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strlen(jumpto) == 0) 1963384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1964384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1965384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(verdict) { 1966384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_ACCEPT: 1967384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso verdict_name = "ACCEPT"; 1968384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 1969384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_DROP: 1970384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso verdict_name = "DROP"; 1971384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 1972384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_RETURN: 1973384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso verdict_name = "RETURN"; 1974384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 1975384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1976384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1977384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Standard target? */ 1978384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (verdict_name && strcmp(jumpto, verdict_name) != 0) 1979384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return false; 1980384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1981384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 1982384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 1983384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_iter_destroy(iter); 1984384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1985384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return true; 1986384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 1987384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1988384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 1989384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso__nft_rule_del(struct nft_handle *h, struct nft_rule *r) 1990384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 1991384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 1992384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 1993384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret; 1994384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 19950391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_DELRULE, h->family, 1996384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso NLM_F_ACK, h->seq); 1997384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_nlmsg_build_payload(nlh, r); 1998384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 1999384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_print_debug(r, nlh); 2000384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2001384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_talk(h, nlh, NULL, NULL); 2002384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret < 0) 2003384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_talk:nft_rule_del"); 2004384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2005384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 20063aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayusostatic struct nft_rule_list *nft_rule_list_create(struct nft_handle *h) 2007384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2008384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_list *list; 2009384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2010384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_rule_list_get(h); 2011384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 2012384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot retrieve rule list from kernel\n"); 20133aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return NULL; 2014384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2015384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 20163aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return list; 20173aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso} 20183aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 20193aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayusostatic void nft_rule_list_destroy(struct nft_rule_list *list) 20203aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso{ 20213aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso nft_rule_list_free(list); 20223aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso} 20233aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 20243aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayusostatic struct nft_rule * 20253aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayusonft_rule_find(struct nft_rule_list *list, const char *chain, const char *table, 20263aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct iptables_command_state *cs, int rulenum) 20273aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso{ 20283aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule *r; 20293aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule_list_iter *iter; 20303aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso int rule_ctr = 0; 20313aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso bool found = false; 20323aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 2033384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_list_iter_create(list); 2034384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 2035384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 2036384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 2037384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2038384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2039384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_list_iter_next(iter); 2040384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (r != NULL) { 2041384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *rule_table = 2042384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_get_str(r, NFT_RULE_ATTR_TABLE); 2043384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *rule_chain = 2044384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_get_str(r, NFT_RULE_ATTR_CHAIN); 2045077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka const struct nft_family_ops *ops = nft_family_ops_lookup( 2046077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka nft_rule_attr_get_u8(r, NFT_RULE_ATTR_FAMILY)); 2047384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct iptables_command_state this = {}; 2048384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2049384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, rule_table) != 0 || 2050384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso strcmp(chain, rule_chain) != 0) { 2051384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("different chain / table\n"); 2052384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2053384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2054384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2055384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (rulenum >= 0) { 2056384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Delete by rule number case */ 20574acee778f5712c4cc574e328183a3252ad81a802Tomasz Bursztyka if (rule_ctr != rulenum) 2058384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 20594acee778f5712c4cc574e328183a3252ad81a802Tomasz Bursztyka found = true; 20604acee778f5712c4cc574e328183a3252ad81a802Tomasz Bursztyka break; 2061384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else { 2062384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Delete by matching rule case */ 2063384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("comparing with... "); 2064384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#ifdef DEBUG_DEL 20651ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso nft_rule_print_save(r, NFT_RULE_APPEND, 0); 2066384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#endif 2067384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2068384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_to_iptables_command_state(r, &this); 2069384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2070077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka if (!ops->is_same(cs, &this)) 2071384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2072384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2073384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!find_matches(cs->matches, r)) { 2074384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("matches not found\n"); 2075384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2076384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2077384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2078384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!find_target(cs->target, r)) { 2079384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("target not found\n"); 2080384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2081384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2082384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2083384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!find_immediate(r, cs->jumpto)) { 2084384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("immediate not found\n"); 2085384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2086384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2087384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2088384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso found = true; 2089384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 2090384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2091384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 20924acee778f5712c4cc574e328183a3252ad81a802Tomasz Bursztyka rule_ctr++; 2093384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_list_iter_next(iter); 2094384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2095384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2096384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_list_iter_destroy(iter); 2097384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 20983aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return found ? r : NULL; 2099384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2100384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2101384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_check(struct nft_handle *h, const char *chain, 2102384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *table, struct iptables_command_state *e, 2103384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool verbose) 2104384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 21053aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule_list *list; 21063aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso int ret; 21073aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 2108384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_fn = nft_rule_check; 2109384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 21103aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso list = nft_rule_list_create(h); 21113aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (list == NULL) { 21123aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso DEBUGP("cannot allocate rule list\n"); 21133aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return 0; 21143aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso } 21153aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21163aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso ret = nft_rule_find(list, chain, table, e, -1) ? 1 : 0; 21173aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (ret == 0) 21183aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso errno = ENOENT; 21193aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21203aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso nft_rule_list_destroy(list); 21213aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21223aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return ret; 2123384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2124384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2125384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_delete(struct nft_handle *h, const char *chain, 21263aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso const char *table, struct iptables_command_state *cs, 2127384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool verbose) 2128384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 21293aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso int ret = 0; 21303aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule *r; 21313aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule_list *list; 21323aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 2133384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_fn = nft_rule_delete; 2134384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 21353aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso list = nft_rule_list_create(h); 21363aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (list == NULL) { 21373aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso DEBUGP("cannot allocate rule list\n"); 21383aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return 0; 21393aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso } 21403aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21413aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso r = nft_rule_find(list, chain, table, cs, -1); 21423aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (r != NULL) { 21433aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso ret = 1; 21443aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21459e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso if (h->commit) { 21469e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS, 21479e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso NFT_RULE_F_COMMIT); 21489e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso } 21493aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso DEBUGP("deleting rule\n"); 21503aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso __nft_rule_del(h, r); 21513aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso } else 21523aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso errno = ENOENT; 21533aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21543aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso nft_rule_list_destroy(list); 21553aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21563aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return ret; 2157384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2158384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2159384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_delete_num(struct nft_handle *h, const char *chain, 21603aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso const char *table, int rulenum, bool verbose) 2161384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 21623aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso int ret = 0; 21633aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule *r; 21643aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule_list *list; 21653aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 2166384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_fn = nft_rule_delete_num; 2167384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 21683aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso list = nft_rule_list_create(h); 21693aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (list == NULL) { 21703aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso DEBUGP("cannot allocate rule list\n"); 21713aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return 0; 21723aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso } 21733aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21743aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso r = nft_rule_find(list, chain, table, NULL, rulenum); 21753aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (r != NULL) { 21763aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso ret = 1; 21773aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21789e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso if (h->commit) { 21799e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS, 21809e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso NFT_RULE_F_COMMIT); 21819e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso } 21823aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso DEBUGP("deleting rule by number %d\n", rulenum); 21833aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso __nft_rule_del(h, r); 21843aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso } else 21853aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso errno = ENOENT; 21863aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21873aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso nft_rule_list_destroy(list); 21883aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 21893aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return ret; 2190384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2191384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2192384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_replace(struct nft_handle *h, const char *chain, 2193384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *table, struct iptables_command_state *cs, 2194384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int rulenum, bool verbose) 2195384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 21963aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso int ret = 0; 21973aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule *r; 21983aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso struct nft_rule_list *list; 2199384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2200384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_fn = nft_rule_replace; 2201384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 22023aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso list = nft_rule_list_create(h); 22033aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (list == NULL) { 22043aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso DEBUGP("cannot allocate rule list\n"); 22053aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return 0; 22063aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso } 22073aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 22083aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso r = nft_rule_find(list, chain, table, cs, rulenum); 22093aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso if (r != NULL) { 22101298a1014bc14c45de50cc242779dfa382c456c9Pablo Neira Ayuso DEBUGP("replacing rule with handle=%llu\n", 22111298a1014bc14c45de50cc242779dfa382c456c9Pablo Neira Ayuso (unsigned long long) 22121298a1014bc14c45de50cc242779dfa382c456c9Pablo Neira Ayuso nft_rule_attr_get_u64(r, NFT_RULE_ATTR_HANDLE)); 2213384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 22149e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso if (h->commit) { 22159e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nft_rule_attr_set_u32(r, NFT_RULE_ATTR_FLAGS, 22169e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso NFT_RULE_F_COMMIT); 22179e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso } 22183aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso ret = nft_rule_add(h, chain, table, cs, true, 22191298a1014bc14c45de50cc242779dfa382c456c9Pablo Neira Ayuso nft_rule_attr_get_u64(r, NFT_RULE_ATTR_HANDLE), 22203aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso verbose); 22213aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso } else 22223aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso errno = ENOENT; 22233aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 22243aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso nft_rule_list_destroy(list); 22253aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso 22263aea037f359795edeb69426e2dde63c59540ba5fPablo Neira Ayuso return ret; 2227384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2228384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2229384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 2230384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoprint_header(unsigned int format, const char *chain, const char *pol, 2231384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xt_counters *counters, bool basechain, uint32_t refs) 2232384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2233384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("Chain %s", chain); 2234384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (basechain) { 2235384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(" (policy %s", pol); 2236384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!(format & FMT_NOCOUNTS)) { 2237384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso fputc(' ', stdout); 2238384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso print_num(counters->pcnt, (format|FMT_NOTABLE)); 2239384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso fputs("packets, ", stdout); 2240384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso print_num(counters->bcnt, (format|FMT_NOTABLE)); 2241384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso fputs("bytes", stdout); 2242384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2243384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(")\n"); 2244384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else { 2245384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(" (%u references)\n", refs); 2246384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2247384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2248384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (format & FMT_LINENUMBERS) 2249384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT("%-4s ", "%s "), "num"); 2250384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!(format & FMT_NOCOUNTS)) { 2251384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (format & FMT_KILOMEGAGIGA) { 2252384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT("%5s ","%s "), "pkts"); 2253384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT("%5s ","%s "), "bytes"); 2254384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else { 2255384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT("%8s ","%s "), "pkts"); 2256384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT("%10s ","%s "), "bytes"); 2257384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2258384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2259384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!(format & FMT_NOTARGET)) 2260384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT("%-9s ","%s "), "target"); 2261384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso fputs(" prot ", stdout); 2262384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (format & FMT_OPTIONS) 2263384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso fputs("opt", stdout); 2264384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (format & FMT_VIA) { 2265384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT(" %-6s ","%s "), "in"); 2266384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT("%-6s ","%s "), "out"); 2267384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2268384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT(" %-19s ","%s "), "source"); 2269384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(FMT(" %-19s "," %s "), "destination"); 2270384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("\n"); 2271384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2272384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2273384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 2274384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoprint_match(struct nft_rule_expr *expr, int numeric) 2275384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2276384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso size_t len; 2277384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *match_name = nft_rule_expr_get_str(expr, NFT_EXPR_MT_NAME); 2278384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const void *match_info = nft_rule_expr_get(expr, NFT_EXPR_MT_INFO, &len); 2279384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xtables_match *match = 2280384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso xtables_find_match(match_name, XTF_TRY_LOAD, NULL); 2281384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xt_entry_match *m = 2282384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso calloc(1, sizeof(struct xt_entry_match) + len); 2283384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2284384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* emulate struct xt_entry_match since ->print needs it */ 2285384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy((void *)&m->data, match_info, len); 2286384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2287384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (match) { 2288384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (match->print) 2289384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* FIXME missing first parameter */ 2290384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso match->print(NULL, m, numeric); 2291384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else 2292384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("%s ", match_name); 2293384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else { 2294384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (match_name[0]) 2295384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("UNKNOWN match `%s' ", match_name); 2296384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2297384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2298384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso free(m); 2299384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2300384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2301384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 2302384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoprint_firewall(const struct iptables_command_state *cs, struct nft_rule *r, 2303384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso unsigned int num, unsigned int format) 2304384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2305384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const struct xtables_target *target = NULL; 2306384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *targname = NULL; 2307384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const void *targinfo = NULL; 23080391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka int family; 2309077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka struct nft_family_ops *ops; 23100391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka uint8_t flags = 0; 2311384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr_iter *iter; 2312384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_expr *expr; 2313384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xt_entry_target *t; 2314384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso size_t target_len = 0; 2315384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2316384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_expr_iter_create(r); 2317384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 2318384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 2319384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 2320384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2321384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2322384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 2323384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (expr != NULL) { 2324384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name = 2325384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); 2326384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2327384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "target") == 0) { 23280391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka targname = nft_rule_expr_get_str(expr, 23290391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka NFT_EXPR_TG_NAME); 23300391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka targinfo = nft_rule_expr_get(expr, NFT_EXPR_TG_INFO, 23310391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka &target_len); 2332384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 2333384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else if (strcmp(name, "immediate") == 0) { 2334384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t verdict = 2335384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_u32(expr, NFT_EXPR_IMM_VERDICT); 2336384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2337384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso switch(verdict) { 2338384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_ACCEPT: 2339384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso targname = "ACCEPT"; 2340384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 2341384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NF_DROP: 2342384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso targname = "DROP"; 2343384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 2344384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_RETURN: 2345384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso targname = "RETURN"; 2346384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 2347384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_GOTO: 23480391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka targname = nft_rule_expr_get_str(expr, 23490391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka NFT_EXPR_IMM_CHAIN); 2350384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 2351384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso case NFT_JUMP: 23520391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka targname = nft_rule_expr_get_str(expr, 23530391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka NFT_EXPR_IMM_CHAIN); 2354384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso break; 2355384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2356384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2357384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 2358384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2359384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_iter_destroy(iter); 2360384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 23610391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka family = nft_rule_attr_get_u8(r, NFT_RULE_ATTR_FAMILY); 2362077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka ops = nft_family_ops_lookup(family); 23630391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka 2364077785df023ad8947d44d19769bc6d91e3917633Tomasz Bursztyka flags = ops->print_firewall(cs, targname, num, format); 2365384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2366384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (format & FMT_NOTABLE) 2367384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso fputs(" ", stdout); 2368384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2369384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#ifdef IPT_F_GOTO 23700391677c1a0b28c14d01febd9628a543e8e5fd62Tomasz Bursztyka if(flags & IPT_F_GOTO) 2371384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("[goto] "); 2372384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso#endif 2373384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2374384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_expr_iter_create(r); 2375384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 2376384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 2377384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 2378384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2379384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2380384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 2381384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (expr != NULL) { 2382384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *name = 2383384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_get_str(expr, NFT_RULE_EXPR_ATTR_NAME); 2384384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2385384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(name, "match") == 0) 2386384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso print_match(expr, format & FMT_NUMERIC); 2387384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2388384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso expr = nft_rule_expr_iter_next(iter); 2389384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2390384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_expr_iter_destroy(iter); 2391384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2392384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso t = calloc(1, sizeof(struct xt_entry_target) + target_len); 2393384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (t == NULL) 2394384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return; 2395384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2396384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* emulate struct xt_entry_match since ->print needs it */ 2397384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso memcpy((void *)&t->data, targinfo, target_len); 2398384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2399384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (targname) { 2400384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso target = xtables_find_target(targname, XTF_TRY_LOAD); 2401384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (target) { 2402384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (target->print) 2403384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* FIXME missing first parameter */ 2404384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso target->print(NULL, t, format & FMT_NUMERIC); 2405384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else 2406384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("[%ld bytes of unknown target data] ", 2407384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso target_len); 2408384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2409384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso free(t); 2410384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2411384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (!(format & FMT_NONEWLINE)) 2412384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso fputc('\n', stdout); 2413384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2414384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2415384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int 2416384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso__nft_rule_list(struct nft_handle *h, struct nft_chain *c, const char *table, 2417384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int rulenum, unsigned int format, 2418384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso void (*cb)(const struct iptables_command_state *cs, 2419384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule *r, unsigned int num, 2420384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso unsigned int format)) 2421384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2422384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_list *list; 2423384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule_list_iter *iter; 2424384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_rule *r; 2425384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int rule_ctr = 0, ret = 0; 2426384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain = nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 2427384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2428384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_rule_list_get(h); 2429384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (list == NULL) { 2430384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot retrieve rule list from kernel\n"); 2431384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 2432384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2433384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2434384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_rule_list_iter_create(list); 2435384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 2436384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 2437384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 2438384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2439384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2440384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_list_iter_next(iter); 2441384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (r != NULL) { 2442384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *rule_table = 2443384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_get_str(r, NFT_RULE_ATTR_TABLE); 2444384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *rule_chain = 2445384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_attr_get_str(r, NFT_RULE_ATTR_CHAIN); 2446384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2447384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso rule_ctr++; 2448384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2449384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, rule_table) != 0 || 2450384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso strcmp(chain, rule_chain) != 0) 2451384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2452384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2453384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (rulenum > 0) { 2454384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* List by rule number case */ 2455384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (rule_ctr != rulenum) { 2456384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso rule_ctr++; 2457384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2458384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2459384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else { 2460384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct iptables_command_state cs = {}; 2461384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Show all rules case */ 2462384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_to_iptables_command_state(r, &cs); 2463384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2464384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso cb(&cs, r, rule_ctr, format); 2465384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2466384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 2467384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso r = nft_rule_list_iter_next(iter); 2468384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2469384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2470384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_list_iter_destroy(iter); 2471384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_list_free(list); 2472384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2473384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret == 0) 2474384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso errno = ENOENT; 2475384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2476384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret; 2477384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2478384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2479384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_list(struct nft_handle *h, const char *chain, const char *table, 2480384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int rulenum, unsigned int format) 2481384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2482384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list *list; 2483384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list_iter *iter; 2484384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 2485384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2486aa1601423175c90c37c3e6a3d6975d3e2eb74d1eTomasz Bursztyka /* If built-in chains don't exist for this table, create them */ 2487aa1601423175c90c37c3e6a3d6975d3e2eb74d1eTomasz Bursztyka if (nft_xtables_config_load(h, XTABLES_CONFIG_DEFAULT, 0) < 0) 2488aa1601423175c90c37c3e6a3d6975d3e2eb74d1eTomasz Bursztyka nft_chain_builtin_init(h, table, NULL, NF_ACCEPT); 2489aa1601423175c90c37c3e6a3d6975d3e2eb74d1eTomasz Bursztyka 2490384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_chain_dump(h); 2491384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2492384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_chain_list_iter_create(list); 2493384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 2494384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 2495384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 2496384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2497384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2498384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 2499384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (c != NULL) { 2500384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_table = 2501384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_TABLE); 2502384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_name = 2503384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 2504384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t policy = 2505384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_u32(c, NFT_CHAIN_ATTR_POLICY); 2506384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t refs = 2507384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_u32(c, NFT_CHAIN_ATTR_USE); 2508384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct xt_counters ctrs = { 2509384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso .pcnt = nft_chain_attr_get_u64(c, NFT_CHAIN_ATTR_PACKETS), 2510384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso .bcnt = nft_chain_attr_get_u64(c, NFT_CHAIN_ATTR_BYTES), 2511384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso }; 2512384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso bool basechain = false; 2513384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2514384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_chain_attr_get(c, NFT_CHAIN_ATTR_HOOKNUM)) 2515384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso basechain = true; 2516384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2517384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, chain_table) != 0) 2518384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2519384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (chain && strcmp(chain, chain_name) != 0) 2520384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2521384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2522384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso print_header(format, chain_name, policy_name[policy], &ctrs, 2523384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso basechain, refs); 2524384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 252506fc595fa99ab0036d87b259b0d20e4916522969Pablo Neira Ayuso __nft_rule_list(h, c, table, rulenum, format, print_firewall); 2526384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 2527384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 2528384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2529384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2530384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_list_free(list); 2531384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2532384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 2533384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2534384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2535384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic void 2536384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusolist_save(const struct iptables_command_state *cs, struct nft_rule *r, 2537384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso unsigned int num, unsigned int format) 2538384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 25391ff21a68502d67e056100da7e0da074467bc08edPablo Neira Ayuso nft_rule_print_save(r, NFT_RULE_APPEND, !(format & FMT_NOCOUNTS)); 2540384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2541384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2542384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusostatic int 2543384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonft_rule_list_chain_save(struct nft_handle *h, const char *table, 2544384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list *list, int counters) 2545384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2546384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list_iter *iter; 2547384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 2548384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2549384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_chain_list_iter_create(list); 2550384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 2551384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 2552384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 2553384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2554384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2555384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 2556384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (c != NULL) { 2557384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_table = 2558384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_TABLE); 2559384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_name = 2560384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 2561384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t policy = 2562384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_u32(c, NFT_CHAIN_ATTR_POLICY); 2563384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2564384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, chain_table) != 0) 2565384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2566384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2567384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* this is a base chain */ 2568384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nft_chain_attr_get(c, NFT_CHAIN_ATTR_HOOKNUM)) { 2569384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-P %s %s", chain_name, policy_name[policy]); 2570384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2571384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (counters) { 2572384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf(" -c %lu %lu\n", 2573384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_u64(c, NFT_CHAIN_ATTR_PACKETS), 2574384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_u64(c, NFT_CHAIN_ATTR_BYTES)); 2575384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else 2576384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("\n"); 2577384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } else { 2578384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso printf("-N %s\n", chain_name); 2579384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2580384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 2581384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 2582384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2583384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2584384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 2585384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2586384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2587384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_rule_list_save(struct nft_handle *h, const char *chain, 2588384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *table, int rulenum, int counters) 2589384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2590384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list *list; 2591384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain_list_iter *iter; 2592384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nft_chain *c; 2593384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2594384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso list = nft_chain_dump(h); 2595384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2596384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Dump policies and custom chains first */ 2597384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_rule_list_chain_save(h, table, list, counters); 2598384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2599384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* Now dump out rules in this table */ 2600384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso iter = nft_chain_list_iter_create(list); 2601384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (iter == NULL) { 2602384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("cannot allocate rule list iterator\n"); 2603384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 2604384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2605384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2606384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 2607384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso while (c != NULL) { 2608384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_table = 2609384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_TABLE); 2610384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *chain_name = 2611384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_attr_get_str(c, NFT_CHAIN_ATTR_NAME); 2612384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2613384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (strcmp(table, chain_table) != 0) 2614384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2615384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (chain && strcmp(chain, chain_name) != 0) 2616384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto next; 2617384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2618384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso __nft_rule_list(h, c, table, rulenum, 2619384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso counters ? 0 : FMT_NOCOUNTS, list_save); 2620384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusonext: 2621384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso c = nft_chain_list_iter_next(iter); 2622384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2623384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2624384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nft_chain_list_free(list); 2625384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2626384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 1; 2627384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2628384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 26299e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayusostatic int nft_action(struct nft_handle *h, int type) 26309e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso{ 26319e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 26329e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso struct nlmsghdr *nlh; 26339e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso uint32_t seq; 26349e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso int ret; 26359e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso 26369e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nlh = mnl_nlmsg_put_header(buf); 26379e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nlh->nlmsg_type = (NFNL_SUBSYS_NFTABLES<< 8) | type; 26389e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; 26399e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nlh->nlmsg_seq = seq = time(NULL); 26409e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso 26419e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso struct nfgenmsg *nfg = mnl_nlmsg_put_extra_header(nlh, sizeof(*nfg)); 26423f7877e6be987bb94897c03a45945725389a6f5cPablo Neira Ayuso nfg->nfgen_family = h->family; 26439e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nfg->version = NFNETLINK_V0; 26449e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso nfg->res_id = 0; 26459e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso 26469e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso ret = mnl_talk(h, nlh, NULL, NULL); 26479e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso if (ret < 0) { 26489e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso if (errno != EEXIST) 26499e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso perror("mnl-talk:nft_commit"); 26509e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso } 26519e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso return ret; 26529e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso} 26539e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso 26549e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayusoint nft_commit(struct nft_handle *h) 26559e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso{ 26569e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso return nft_action(h, NFT_MSG_COMMIT); 26579e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso} 26589e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso 26599e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayusoint nft_abort(struct nft_handle *h) 26609e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso{ 26619e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso return nft_action(h, NFT_MSG_ABORT); 26629e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso} 26639e62dc8637f210cdeaed784396fecab9b6e5f043Pablo Neira Ayuso 2664384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoint nft_compatible_revision(const char *name, uint8_t rev, int opt) 2665384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2666384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct mnl_socket *nl; 2667384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso char buf[MNL_SOCKET_BUFFER_SIZE]; 2668384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nlmsghdr *nlh; 2669384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso uint32_t portid, seq, type; 2670384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int ret = 0; 2671384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2672384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (opt == IPT_SO_GET_REVISION_MATCH) 2673384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso type = 0; 2674384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso else 2675384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso type = 1; 2676384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2677384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nlh = mnl_nlmsg_put_header(buf); 2678384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nlh->nlmsg_type = (NFNL_SUBSYS_NFT_COMPAT << 8) | NFNL_MSG_COMPAT_GET; 2679384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; 2680384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nlh->nlmsg_seq = seq = time(NULL); 2681384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2682384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso struct nfgenmsg *nfg = mnl_nlmsg_put_extra_header(nlh, sizeof(*nfg)); 2683384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nfg->nfgen_family = AF_INET; 2684384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nfg->version = NFNETLINK_V0; 2685384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nfg->res_id = 0; 2686384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2687384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mnl_attr_put_strz(nlh, NFTA_COMPAT_NAME, name); 2688384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mnl_attr_put_u32(nlh, NFTA_COMPAT_REV, htonl(rev)); 2689384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mnl_attr_put_u32(nlh, NFTA_COMPAT_TYPE, htonl(type)); 2690384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2691384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso DEBUGP("requesting `%s' rev=%d type=%d via nft_compat\n", 2692384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso name, rev, type); 2693384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2694384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso nl = mnl_socket_open(NETLINK_NETFILTER); 2695384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (nl == NULL) { 2696384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_socket_open"); 2697384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return 0; 2698384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2699384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2700384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { 2701384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_socket_bind"); 2702384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 2703384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2704384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso portid = mnl_socket_get_portid(nl); 2705384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2706384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { 2707384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_socket_send"); 2708384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 2709384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2710384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2711384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); 2712384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret == -1) { 2713384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_socket_recvfrom"); 2714384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 2715384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2716384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2717384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL); 2718384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if (ret == -1) { 2719384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso perror("mnl_cb_run"); 2720384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso goto err; 2721384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2722384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2723384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoerr: 2724384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso mnl_socket_close(nl); 2725384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2726384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return ret < 0 ? 0 : 1; 2727384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 2728384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2729384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso/* Translates errno numbers into more human-readable form than strerror. */ 2730384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayusoconst char *nft_strerror(int err) 2731384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso{ 2732384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso unsigned int i; 2733384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso static struct table_struct { 2734384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso void *fn; 2735384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso int err; 2736384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso const char *message; 2737384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } table[] = 2738384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { 2739384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_chain_user_del, ENOTEMPTY, "Chain is not empty" }, 2740384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_chain_user_del, EINVAL, "Can't delete built-in chain" }, 2741384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_chain_user_del, EMLINK, 2742384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso "Can't delete chain with references left" }, 2743384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_chain_user_add, EEXIST, "Chain already exists" }, 2744384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_rule_add, E2BIG, "Index of insertion too big" }, 2745384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_rule_replace, E2BIG, "Index of replacement too big" }, 2746384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_rule_delete_num, E2BIG, "Index of deletion too big" }, 2747384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso/* { TC_READ_COUNTER, E2BIG, "Index of counter too big" }, 2748384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { TC_ZERO_COUNTER, E2BIG, "Index of counter too big" }, */ 2749384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_rule_add, ELOOP, "Loop found in table" }, 2750384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_rule_add, EINVAL, "Target problem" }, 2751384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso /* ENOENT for DELETE probably means no matching rule */ 2752384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_rule_delete, ENOENT, 2753384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso "Bad rule (does a matching rule exist in that chain?)" }, 2754384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_chain_set, ENOENT, "Bad built-in chain name" }, 2755384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { nft_chain_set, EINVAL, "Bad policy name" }, 2756384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { NULL, EPERM, "Permission denied (you must be root)" }, 2757384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { NULL, 0, "Incompatible with this kernel" }, 2758384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { NULL, ENOPROTOOPT, "iptables who? (do you need to insmod?)" }, 2759384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { NULL, ENOSYS, "Will be implemented real soon. I promise ;)" }, 2760384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { NULL, ENOMEM, "Memory allocation problem" }, 2761384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso { NULL, ENOENT, "No chain/target/match by that name" }, 2762384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso }; 2763384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2764384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso for (i = 0; i < sizeof(table)/sizeof(struct table_struct); i++) { 2765384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso if ((!table[i].fn || table[i].fn == nft_fn) 2766384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso && table[i].err == err) 2767384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return table[i].message; 2768384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso } 2769384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso 2770384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso return strerror(err); 2771384958620abab397062b67fb2763e813b63f74f0Pablo Neira Ayuso} 27728b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 27738b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayusostatic void xtables_config_perror(uint32_t flags, const char *fmt, ...) 27748b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso{ 27758b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso va_list args; 27768b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 27778b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso va_start(args, fmt); 27788b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 27798b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (flags & NFT_LOAD_VERBOSE) 27808b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso vfprintf(stderr, fmt, args); 27818b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 27828b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso va_end(args); 27838b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso} 27848b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 27858b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayusoint nft_xtables_config_load(struct nft_handle *h, const char *filename, 27868b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso uint32_t flags) 27878b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso{ 27888b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso struct nft_table_list *table_list = nft_table_list_alloc(); 27898b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso struct nft_chain_list *chain_list = nft_chain_list_alloc(); 27908b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso struct nft_table_list_iter *titer; 27918b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso struct nft_chain_list_iter *citer; 27928b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso struct nft_table *table; 27938b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso struct nft_chain *chain; 27948b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 27958b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (xtables_config_parse(filename, table_list, chain_list) < 0) { 27968b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (errno == ENOENT) { 27978b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, 27988b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso "configuration file `%s' does not exists\n", 27998b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso filename); 28008b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } else { 28018b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, 28028b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso "Fatal error parsing config file: %s\n", 28038b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso strerror(errno)); 28048b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28058b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso return -1; 28068b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28078b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 28088b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso nft_init(h); 28098b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 28108b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso /* Stage 1) create tables */ 28118b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso titer = nft_table_list_iter_create(table_list); 28128b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso while ((table = nft_table_list_iter_next(titer)) != NULL) { 28138b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (nft_table_add(h, table) < 0) { 28148b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (errno == EEXIST) { 28158b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, 28168b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso "table `%s' already exists, skipping\n", 28178b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_table_attr_get(table, NFT_TABLE_ATTR_NAME)); 28188b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } else { 28198b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, 28208b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso "table `%s' cannot be create, reason `%s'. Exitting\n", 28218b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_table_attr_get(table, NFT_TABLE_ATTR_NAME), 28228b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso strerror(errno)); 28238b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso return -1; 28248b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28258b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso continue; 28268b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28278b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, "table `%s' has been created\n", 28288b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_table_attr_get(table, NFT_TABLE_ATTR_NAME)); 28298b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28308b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 28318b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso /* Stage 2) create chains */ 28328b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso citer = nft_chain_list_iter_create(chain_list); 28338b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso while ((chain = nft_chain_list_iter_next(citer)) != NULL) { 28348b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (nft_chain_add(h, chain) < 0) { 28358b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso if (errno == EEXIST) { 28368b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, 28378b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso "chain `%s' already exists in table `%s', skipping\n", 28388b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_chain_attr_get(chain, NFT_CHAIN_ATTR_NAME), 28398b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_chain_attr_get(chain, NFT_CHAIN_ATTR_TABLE)); 28408b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } else { 28418b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, 28428b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso "chain `%s' cannot be create, reason `%s'. Exitting\n", 28438b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_chain_attr_get(chain, NFT_CHAIN_ATTR_NAME), 28448b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso strerror(errno)); 28458b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso return -1; 28468b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28478b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso continue; 28488b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28498b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso 28508b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso xtables_config_perror(flags, 28518b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso "chain `%s' in table `%s' has been created\n", 28528b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_chain_attr_get(chain, NFT_CHAIN_ATTR_NAME), 28538b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso (char *)nft_chain_attr_get(chain, NFT_CHAIN_ATTR_TABLE)); 28548b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso } 28558b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso return 0; 28568b9ea2e3f8d685a6b940691cabf5e82c96254747Pablo Neira Ayuso} 2857