1dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat/* 2dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * ipmroute.c "ip mroute". 3dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 4dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * This program is free software; you can redistribute it and/or 5dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * modify it under the terms of the GNU General Public License 6dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * as published by the Free Software Foundation; either version 7dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 2 of the License, or (at your option) any later version. 8dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 9dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 10dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat * 11dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat */ 12dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 13dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <stdio.h> 14dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <stdlib.h> 15dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <unistd.h> 16dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <syslog.h> 17dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <fcntl.h> 18dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <sys/ioctl.h> 19dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <sys/socket.h> 20dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <netinet/in.h> 21dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <arpa/inet.h> 22dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <string.h> 23dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 24dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <linux/netdevice.h> 25dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <linux/if.h> 26dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <linux/if_arp.h> 27dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include <linux/sockios.h> 28dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 29dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#include "utils.h" 30dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 31dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatchar filter_dev[16]; 32dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint filter_family; 33dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 34dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic void usage(void) __attribute__((noreturn)); 35dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 36dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic void usage(void) 37dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 38dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr, "Usage: ip mroute show [ PREFIX ] [ from PREFIX ] [ iif DEVICE ]\n"); 39dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#if 0 40dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr, "Usage: ip mroute [ add | del ] DESTINATION from SOURCE [ iif DEVICE ] [ oif DEVICE ]\n"); 41dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#endif 42dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat exit(-1); 43dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 44dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 45dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic char *viftable[32]; 46dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 47dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstruct rtfilter 48dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 49dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat inet_prefix mdst; 50dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat inet_prefix msrc; 51dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} filter; 52dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 53dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic void read_viftable(void) 54dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 55dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char buf[256]; 56dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat FILE *fp = fopen("/proc/net/ip_mr_vif", "r"); 57dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 58dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (!fp) 59dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return; 60dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 61dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fgets(buf, sizeof(buf), fp); 62dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 63dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat while (fgets(buf, sizeof(buf), fp)) { 64dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int vifi; 65dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char dev[256]; 66dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 67dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (sscanf(buf, "%d%s", &vifi, dev) < 2) 68dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 69dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 70dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (vifi<0 || vifi>31) 71dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 72dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 73dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat viftable[vifi] = strdup(dev); 74dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 75dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fclose(fp); 76dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 77dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 78dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic void read_mroute_list(FILE *ofp) 79dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 80dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char buf[256]; 81dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat FILE *fp = fopen("/proc/net/ip_mr_cache", "r"); 82dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 83dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (!fp) 84dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return; 85dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 86dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fgets(buf, sizeof(buf), fp); 87dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 88dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat while (fgets(buf, sizeof(buf), fp)) { 89dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat inet_prefix maddr, msrc; 90dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat unsigned pkts, b, w; 91dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int vifi; 92dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char oiflist[256]; 93dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char sbuf[256]; 94dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char mbuf[256]; 95dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char obuf[256]; 96dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 97dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat oiflist[0] = 0; 98dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (sscanf(buf, "%x%x%d%u%u%u %[^\n]", 99dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat maddr.data, msrc.data, &vifi, 100dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat &pkts, &b, &w, oiflist) < 6) 101dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 102dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 103dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (vifi!=-1 && (vifi < 0 || vifi>31)) 104dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 105dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 106dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (filter_dev[0] && (vifi<0 || strcmp(filter_dev, viftable[vifi]))) 107dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 108dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (filter.mdst.family && inet_addr_match(&maddr, &filter.mdst, filter.mdst.bitlen)) 109dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 110dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (filter.msrc.family && inet_addr_match(&msrc, &filter.msrc, filter.msrc.bitlen)) 111dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 112dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 113dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat snprintf(obuf, sizeof(obuf), "(%s, %s)", 114dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat format_host(AF_INET, 4, &msrc.data[0], sbuf, sizeof(sbuf)), 115dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat format_host(AF_INET, 4, &maddr.data[0], mbuf, sizeof(mbuf))); 116dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 117dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "%-32s Iif: ", obuf); 118dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 119dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (vifi == -1) 120dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "unresolved "); 121dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else 122dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "%-10s ", viftable[vifi]); 123dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 124dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (oiflist[0]) { 125dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char *next = NULL; 126dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat char *p = oiflist; 127dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat int ovifi, ottl; 128dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 129dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "Oifs: "); 130dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 131dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat while (p) { 132dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat next = strchr(p, ' '); 133dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (next) { 134dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat *next = 0; 135dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat next++; 136dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 137dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (sscanf(p, "%d:%d", &ovifi, &ottl)<2) { 138dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat p = next; 139dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat continue; 140dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 141dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat p = next; 142dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 143dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "%s", viftable[ovifi]); 144dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (ottl>1) 145dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "(ttl %d) ", ovifi); 146dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat else 147dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, " "); 148dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 149dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 150dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 151dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (show_stats && b) { 152dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "%s %u packets, %u bytes", _SL_, pkts, b); 153dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (w) 154dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, ", %u arrived on wrong iif.", w); 155dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 156dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(ofp, "\n"); 157dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 158dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fclose(fp); 159dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 160dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 161dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 162dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatstatic int mroute_list(int argc, char **argv) 163dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 164dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat while (argc > 0) { 165dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (strcmp(*argv, "iif") == 0) { 166dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 167dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat strncpy(filter_dev, *argv, sizeof(filter_dev)-1); 168dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } else if (matches(*argv, "from") == 0) { 169dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 170dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat get_prefix(&filter.msrc, *argv, AF_INET); 171dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } else { 172dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (strcmp(*argv, "to") == 0) { 173dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat NEXT_ARG(); 174dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 175dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (matches(*argv, "help") == 0) 176dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat usage(); 177dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat get_prefix(&filter.mdst, *argv, AF_INET); 178dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 179dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat argv++; argc--; 180dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat } 181dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 182dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat read_viftable(); 183dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat read_mroute_list(stdout); 184dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return 0; 185dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 186dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat 187dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehatint do_multiroute(int argc, char **argv) 188dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat{ 189dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (argc < 1) 190dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return mroute_list(0, NULL); 191dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#if 0 192dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (matches(*argv, "add") == 0) 193dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return mroute_modify(RTM_NEWADDR, argc-1, argv+1); 194dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (matches(*argv, "delete") == 0) 195dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return mroute_modify(RTM_DELADDR, argc-1, argv+1); 196dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (matches(*argv, "get") == 0) 197dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return mroute_get(argc-1, argv+1); 198dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat#endif 199dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 200dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat || matches(*argv, "lst") == 0) 201dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat return mroute_list(argc-1, argv+1); 202dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat if (matches(*argv, "help") == 0) 203dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat usage(); 204dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat fprintf(stderr, "Command \"%s\" is unknown, try \"ip mroute help\".\n", *argv); 205dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat exit(-1); 206dcfb7a77f8709125e97c313cb8ab6ec4d87468f4San Mehat} 207