security/apparmor/include/net.h

   1 /*
   2  * AppArmor security module
   3  *
   4  * This file contains AppArmor network mediation definitions.
   5  *
   6  * Copyright (C) 1998-2008 Novell/SUSE
   7  * Copyright 2009-2017 Canonical Ltd.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation, version 2 of the
  12  * License.
  13  */
  14
  15 #ifndef __AA_NET_H
  16 #define __AA_NET_H
  17
  18 #include <net/sock.h>
  19 #include <linux/path.h>
  20
  21 #include "apparmorfs.h"
  22 #include "label.h"
  23 #include "perms.h"
  24 #include "policy.h"
  25
  26 #define AA_MAY_SEND             AA_MAY_WRITE
  27 #define AA_MAY_RECEIVE          AA_MAY_READ
  28
  29 #define AA_MAY_SHUTDOWN         AA_MAY_DELETE
  30
  31 #define AA_MAY_CONNECT          AA_MAY_OPEN
  32 #define AA_MAY_ACCEPT           0x00100000
  33
  34 #define AA_MAY_BIND             0x00200000
  35 #define AA_MAY_LISTEN           0x00400000
  36
  37 #define AA_MAY_SETOPT           0x01000000
  38 #define AA_MAY_GETOPT           0x02000000
  39
  40 #define NET_PERMS_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE |    \
  41                         AA_MAY_SHUTDOWN | AA_MAY_BIND | AA_MAY_LISTEN |   \
  42                         AA_MAY_CONNECT | AA_MAY_ACCEPT | AA_MAY_SETATTR | \
  43                         AA_MAY_GETATTR | AA_MAY_SETOPT | AA_MAY_GETOPT)
  44
  45 #define NET_FS_PERMS (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE |    \
  46                       AA_MAY_SHUTDOWN | AA_MAY_CONNECT | AA_MAY_RENAME |\
  47                       AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_CHMOD |  \
  48                       AA_MAY_CHOWN | AA_MAY_CHGRP | AA_MAY_LOCK |       \
  49                       AA_MAY_MPROT)
  50
  51 #define NET_PEER_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CONNECT |  \
  52                        AA_MAY_ACCEPT)
  53 struct aa_sk_ctx {
  54         struct aa_label *label;
  55         struct aa_label *peer;
  56         struct path path;
  57 };
  58
  59 #define SK_CTX(X) ((X)->sk_security)
  60 #define SOCK_ctx(X) SOCK_INODE(X)->i_security
  61 #define DEFINE_AUDIT_NET(NAME, OP, SK, F, T, P)                           \
  62         struct lsm_network_audit NAME ## _net = { .sk = (SK),             \
  63                                                   .family = (F)};         \
  64         DEFINE_AUDIT_DATA(NAME,                                           \
  65                           ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
  66                                                      LSM_AUDIT_DATA_NONE, \
  67                           OP);                                            \
  68         NAME.u.net = &(NAME ## _net);                                     \
  69         aad(&NAME)->net.type = (T);                                       \
  70         aad(&NAME)->net.protocol = (P)
  71
  72 #define DEFINE_AUDIT_SK(NAME, OP, SK)                                   \
  73         DEFINE_AUDIT_NET(NAME, OP, SK, (SK)->sk_family, (SK)->sk_type,  \
  74                          (SK)->sk_protocol)
  75
  76 /* struct aa_net - network confinement data
  77  * @allow: basic network families permissions
  78  * @audit: which network permissions to force audit
  79  * @quiet: which network permissions to quiet rejects
  80  */
  81 struct aa_net {
  82         u16 allow[AF_MAX];
  83         u16 audit[AF_MAX];
  84         u16 quiet[AF_MAX];
  85 };
  86
  87
  88 extern struct aa_sfs_entry aa_sfs_entry_network[];
  89
  90 void audit_net_cb(struct audit_buffer *ab, void *va);
  91 int aa_profile_af_perm(struct aa_profile *profile, struct common_audit_data *sa,
  92                        u32 request, u16 family, int type);
  93 int aa_af_perm(struct aa_label *label, const char *op, u32 request, u16 family,
  94                int type, int protocol);
  95 static inline int aa_profile_af_sk_perm(struct aa_profile *profile,
  96                                         struct common_audit_data *sa,
  97                                         u32 request,
  98                                         struct sock *sk)
  99 {
 100         return aa_profile_af_perm(profile, sa, request, sk->sk_family,
 101                                   sk->sk_type);
 102 }
 103 int aa_sk_perm(const char *op, u32 request, struct sock *sk);
 104
 105 int aa_sock_file_perm(struct aa_label *label, const char *op, u32 request,
 106                       struct socket *sock);
 107
 108
 109 static inline void aa_free_net_rules(struct aa_net *new)
 110 {
 111         /* NOP */
 112 }
 113
 114 #endif /* __AA_NET_H */