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)
49struct aa_sk_ctx {
50	struct aa_label *label;
51	struct aa_label *peer;
52};
53
54#define SK_CTX(X) ((X)->sk_security)
55#define SOCK_ctx(X) SOCK_INODE(X)->i_security
56#define DEFINE_AUDIT_NET(NAME, OP, SK, F, T, P)				  \
57	struct lsm_network_audit NAME ## _net = { .sk = (SK),		  \
58						  .family = (F)};	  \
59	DEFINE_AUDIT_DATA(NAME,						  \
60			  ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
61						     LSM_AUDIT_DATA_NONE, \
62						     AA_CLASS_NET,        \
63			  OP);						  \
64	NAME.common.u.net = &(NAME ## _net);				  \
65	NAME.net.type = (T);						  \
66	NAME.net.protocol = (P)
67
68#define DEFINE_AUDIT_SK(NAME, OP, SK)					\
69	DEFINE_AUDIT_NET(NAME, OP, SK, (SK)->sk_family, (SK)->sk_type,	\
70			 (SK)->sk_protocol)
71
72
73#define af_select(FAMILY, FN, DEF_FN)		\
74({						\
75	int __e;				\
76	switch ((FAMILY)) {			\
77	default:				\
78		__e = DEF_FN;			\
79	}					\
80	__e;					\
81})
82
83struct aa_secmark {
84	u8 audit;
85	u8 deny;
86	u32 secid;
87	char *label;
88};
89
90extern struct aa_sfs_entry aa_sfs_entry_network[];
91
92void audit_net_cb(struct audit_buffer *ab, void *va);
93int aa_profile_af_perm(struct aa_profile *profile,
94		       struct apparmor_audit_data *ad,
95		       u32 request, u16 family, int type);
96int aa_af_perm(const struct cred *subj_cred, struct aa_label *label,
97	       const char *op, u32 request, u16 family,
98	       int type, int protocol);
99static inline int aa_profile_af_sk_perm(struct aa_profile *profile,
100					struct apparmor_audit_data *ad,
101					u32 request,
102					struct sock *sk)
103{
104	return aa_profile_af_perm(profile, ad, request, sk->sk_family,
105				  sk->sk_type);
106}
107int aa_sk_perm(const char *op, u32 request, struct sock *sk);
108
109int aa_sock_file_perm(const struct cred *subj_cred, struct aa_label *label,
110		      const char *op, u32 request,
111		      struct socket *sock);
112
113int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
114			   u32 secid, const struct sock *sk);
115
116#endif /* __AA_NET_H */
117