Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Netlink message type permission tables, for user generated messages. |
| 3 | * |
| 4 | * Author: James Morris <jmorris@redhat.com> |
| 5 | * |
| 6 | * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2, |
| 10 | * as published by the Free Software Foundation. |
| 11 | */ |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/skbuff.h> |
| 15 | #include <linux/netlink.h> |
| 16 | #include <linux/rtnetlink.h> |
| 17 | #include <linux/if.h> |
| 18 | #include <linux/netfilter_ipv4/ip_queue.h> |
James Morris | 216efaa | 2005-08-15 20:34:48 -0700 | [diff] [blame] | 19 | #include <linux/inet_diag.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/xfrm.h> |
| 21 | #include <linux/audit.h> |
| 22 | |
| 23 | #include "flask.h" |
| 24 | #include "av_permissions.h" |
| 25 | |
| 26 | struct nlmsg_perm |
| 27 | { |
| 28 | u16 nlmsg_type; |
| 29 | u32 perm; |
| 30 | }; |
| 31 | |
| 32 | static struct nlmsg_perm nlmsg_route_perms[] = |
| 33 | { |
| 34 | { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 35 | { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 36 | { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 37 | { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 38 | { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 39 | { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 40 | { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 41 | { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 42 | { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 43 | { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 44 | { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 45 | { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 46 | { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 47 | { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 48 | { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 49 | { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 50 | { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 51 | { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 52 | { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 53 | { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 54 | { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 55 | { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 56 | { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 57 | { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 58 | { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 59 | { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 60 | { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 61 | { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 62 | { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 63 | { RTM_GETPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 64 | { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 65 | { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
Thomas Graf | c7fb64d | 2005-06-18 22:50:55 -0700 | [diff] [blame] | 66 | { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 67 | { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | }; |
| 69 | |
| 70 | static struct nlmsg_perm nlmsg_firewall_perms[] = |
| 71 | { |
| 72 | { IPQM_MODE, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE }, |
| 73 | { IPQM_VERDICT, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE }, |
| 74 | }; |
| 75 | |
| 76 | static struct nlmsg_perm nlmsg_tcpdiag_perms[] = |
| 77 | { |
| 78 | { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
James Morris | 216efaa | 2005-08-15 20:34:48 -0700 | [diff] [blame] | 79 | { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | static struct nlmsg_perm nlmsg_xfrm_perms[] = |
| 83 | { |
| 84 | { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 85 | { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 86 | { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
| 87 | { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 88 | { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 89 | { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
| 90 | { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 91 | { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 92 | { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 93 | }; |
| 94 | |
| 95 | static struct nlmsg_perm nlmsg_audit_perms[] = |
| 96 | { |
James Morris | b207a29 | 2005-05-01 08:58:40 -0700 | [diff] [blame] | 97 | { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
| 98 | { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 99 | { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, |
| 100 | { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 101 | { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
Amy Griffis | 93315ed | 2006-02-07 12:05:27 -0500 | [diff] [blame^] | 102 | { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, |
| 103 | { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 104 | { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
James Morris | b207a29 | 2005-05-01 08:58:40 -0700 | [diff] [blame] | 105 | { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, |
Steve Grubb | c2f0c7c | 2005-05-06 12:38:39 +0100 | [diff] [blame] | 106 | { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | }; |
| 108 | |
| 109 | |
| 110 | static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize) |
| 111 | { |
| 112 | int i, err = -EINVAL; |
| 113 | |
| 114 | for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++) |
| 115 | if (nlmsg_type == tab[i].nlmsg_type) { |
| 116 | *perm = tab[i].perm; |
| 117 | err = 0; |
| 118 | break; |
| 119 | } |
| 120 | |
| 121 | return err; |
| 122 | } |
| 123 | |
| 124 | int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm) |
| 125 | { |
| 126 | int err = 0; |
| 127 | |
| 128 | switch (sclass) { |
| 129 | case SECCLASS_NETLINK_ROUTE_SOCKET: |
| 130 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms, |
| 131 | sizeof(nlmsg_route_perms)); |
| 132 | break; |
| 133 | |
| 134 | case SECCLASS_NETLINK_FIREWALL_SOCKET: |
James Morris | 388c697 | 2005-04-16 15:24:03 -0700 | [diff] [blame] | 135 | case SECCLASS_NETLINK_IP6FW_SOCKET: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms, |
| 137 | sizeof(nlmsg_firewall_perms)); |
| 138 | break; |
| 139 | |
| 140 | case SECCLASS_NETLINK_TCPDIAG_SOCKET: |
| 141 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms, |
| 142 | sizeof(nlmsg_tcpdiag_perms)); |
| 143 | break; |
| 144 | |
| 145 | case SECCLASS_NETLINK_XFRM_SOCKET: |
| 146 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms, |
| 147 | sizeof(nlmsg_xfrm_perms)); |
| 148 | break; |
| 149 | |
| 150 | case SECCLASS_NETLINK_AUDIT_SOCKET: |
Steve Grubb | 90d526c | 2005-11-03 15:48:08 +0000 | [diff] [blame] | 151 | if ((nlmsg_type >= AUDIT_FIRST_USER_MSG && |
| 152 | nlmsg_type <= AUDIT_LAST_USER_MSG) || |
| 153 | (nlmsg_type >= AUDIT_FIRST_USER_MSG2 && |
| 154 | nlmsg_type <= AUDIT_LAST_USER_MSG2)) { |
David Woodhouse | 209aba0 | 2005-05-18 10:21:07 +0100 | [diff] [blame] | 155 | *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY; |
| 156 | } else { |
| 157 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms, |
| 158 | sizeof(nlmsg_audit_perms)); |
| 159 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | break; |
| 161 | |
| 162 | /* No messaging from userspace, or class unknown/unhandled */ |
| 163 | default: |
| 164 | err = -ENOENT; |
| 165 | break; |
| 166 | } |
| 167 | |
| 168 | return err; |
| 169 | } |