1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * AppArmor security module
4 *
5 * This file contains AppArmor network mediation definitions.
6 *
7 * Copyright (C) 1998-2008 Novell/SUSE
8 * Copyright 2009-2017 Canonical Ltd.
9 */
10
11 #ifndef __AA_NET_H
12 #define __AA_NET_H
13
14 #include <net/sock.h>
15 #include <linux/path.h>
16
17 #include "apparmorfs.h"
18 #include "label.h"
19 #include "perms.h"
20 #include "policy.h"
21
22 #define AA_MAY_SEND AA_MAY_WRITE
23 #define AA_MAY_RECEIVE AA_MAY_READ
24
25 #define AA_MAY_SHUTDOWN AA_MAY_DELETE
26
27 #define AA_MAY_CONNECT AA_MAY_OPEN
28 #define AA_MAY_ACCEPT 0x00100000
29
30 #define AA_MAY_BIND 0x00200000
31 #define AA_MAY_LISTEN 0x00400000
32
33 #define AA_MAY_SETOPT 0x01000000
34 #define AA_MAY_GETOPT 0x02000000
35
36 #define NET_PERMS_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE | \
37 AA_MAY_SHUTDOWN | AA_MAY_BIND | AA_MAY_LISTEN | \
38 AA_MAY_CONNECT | AA_MAY_ACCEPT | AA_MAY_SETATTR | \
39 AA_MAY_GETATTR | AA_MAY_SETOPT | AA_MAY_GETOPT)
40
41 #define NET_FS_PERMS (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE | \
42 AA_MAY_SHUTDOWN | AA_MAY_CONNECT | AA_MAY_RENAME |\
43 AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_CHMOD | \
44 AA_MAY_CHOWN | AA_MAY_CHGRP | AA_MAY_LOCK | \
45 AA_MAY_MPROT)
46
47 #define NET_PEER_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CONNECT | \
48 AA_MAY_ACCEPT)
49 struct aa_sk_ctx {
50 struct aa_label *label;
51 struct aa_label *peer;
52 };
53
54 static inline struct aa_sk_ctx *aa_sock(const struct sock *sk)
55 {
56 return sk->sk_security + apparmor_blob_sizes.lbs_sock;
57 }
58
59 #define DEFINE_AUDIT_NET(NAME, OP, SK, F, T, P) \
60 struct lsm_network_audit NAME ## _net = { .sk = (SK), \
61 .family = (F)}; \
62 DEFINE_AUDIT_DATA(NAME, \
63 ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
64 LSM_AUDIT_DATA_NONE, \
65 AA_CLASS_NET, \
66 OP); \
67 NAME.common.u.net = &(NAME ## _net); \
68 NAME.net.type = (T); \
69 NAME.net.protocol = (P)
70
71 #define DEFINE_AUDIT_SK(NAME, OP, SK) \
72 DEFINE_AUDIT_NET(NAME, OP, SK, (SK)->sk_family, (SK)->sk_type, \
73 (SK)->sk_protocol)
74
75
76 #define af_select(FAMILY, FN, DEF_FN) \
77 ({ \
78 int __e; \
79 switch ((FAMILY)) { \
80 default: \
81 __e = DEF_FN; \
82 } \
83 __e; \
84 })
85
86 struct aa_secmark {
87 u8 audit;
88 u8 deny;
89 u32 secid;
90 char *label;
91 };
92
93 extern struct aa_sfs_entry aa_sfs_entry_network[];
94
95 void audit_net_cb(struct audit_buffer *ab, void *va);
96 int aa_profile_af_perm(struct aa_profile *profile,
97 struct apparmor_audit_data *ad,
98 u32 request, u16 family, int type);
99 int aa_af_perm(const struct cred *subj_cred, struct aa_label *label,
100 const char *op, u32 request, u16 family,
101 int type, int protocol);
102 static inline int aa_profile_af_sk_perm(struct aa_profile *profile,
103 struct apparmor_audit_data *ad,
104 u32 request,
105 struct sock *sk)
106 {
107 return aa_profile_af_perm(profile, ad, request, sk->sk_family,
108 sk->sk_type);
109 }
110 int aa_sk_perm(const char *op, u32 request, struct sock *sk);
111
112 int aa_sock_file_perm(const struct cred *subj_cred, struct aa_label *label,
113 const char *op, u32 request,
114 struct socket *sock);
115
116 int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
117 u32 secid, const struct sock *sk);
118
119 #endif /* __AA_NET_H */
120
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