nlmsgtab.c revision b207a290ea7dc83dba02e40b81cc8a29415a9c60
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Netlink message type permission tables, for user generated messages. 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Author: James Morris <jmorris@redhat.com> 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License version 2, 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation. 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/skbuff.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netlink.h> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rtnetlink.h> 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/if.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netfilter_ipv4/ip_queue.h> 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/tcp_diag.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/xfrm.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/audit.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "flask.h" 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "av_permissions.h" 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct nlmsg_perm 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 nlmsg_type; 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 perm; 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct nlmsg_perm nlmsg_route_perms[] = 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct nlmsg_perm nlmsg_firewall_perms[] = 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { IPQM_MODE, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE }, 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { IPQM_VERDICT, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE }, 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct nlmsg_perm nlmsg_tcpdiag_perms[] = 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct nlmsg_perm nlmsg_xfrm_perms[] = 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ }, 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ }, 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct nlmsg_perm nlmsg_audit_perms[] = 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 94b207a290ea7dc83dba02e40b81cc8a29415a9c60James Morris { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, 95b207a290ea7dc83dba02e40b81cc8a29415a9c60James Morris { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, 96b207a290ea7dc83dba02e40b81cc8a29415a9c60James Morris { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, 97b207a290ea7dc83dba02e40b81cc8a29415a9c60James Morris { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, 98b207a290ea7dc83dba02e40b81cc8a29415a9c60James Morris { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, 99b207a290ea7dc83dba02e40b81cc8a29415a9c60James Morris { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize) 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i, err = -EINVAL; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++) 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nlmsg_type == tab[i].nlmsg_type) { 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *perm = tab[i].perm; 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = 0; 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsint selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm) 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err = 0; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (sclass) { 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SECCLASS_NETLINK_ROUTE_SOCKET: 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms, 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(nlmsg_route_perms)); 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SECCLASS_NETLINK_FIREWALL_SOCKET: 128388c69789a2a2e50965e805e3e641418082b352cJames Morris case SECCLASS_NETLINK_IP6FW_SOCKET: 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms, 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(nlmsg_firewall_perms)); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SECCLASS_NETLINK_TCPDIAG_SOCKET: 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms, 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(nlmsg_tcpdiag_perms)); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SECCLASS_NETLINK_XFRM_SOCKET: 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms, 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(nlmsg_xfrm_perms)); 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SECCLASS_NETLINK_AUDIT_SOCKET: 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms, 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof(nlmsg_audit_perms)); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* No messaging from userspace, or class unknown/unhandled */ 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = -ENOENT; 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 156