net.h

  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 __rcu *label;
 51	struct aa_label __rcu *peer;
 52	struct aa_label __rcu *peer_lastupdate;	/* ptr cmp only, no deref */
 53};
 54
 55static inline struct aa_sk_ctx *aa_sock(const struct sock *sk)
 56{
 57	return sk->sk_security + apparmor_blob_sizes.lbs_sock;
 58}
 59
 60#define DEFINE_AUDIT_NET(NAME, OP, CRED, SK, F, T, P)			  \
 61	struct lsm_network_audit NAME ## _net = { .sk = (SK),		  \
 62						  .family = (F)};	  \
 63	DEFINE_AUDIT_DATA(NAME,						  \
 64			  ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
 65						     LSM_AUDIT_DATA_NONE, \
 66						     AA_CLASS_NET,        \
 67			  OP);						  \
 68	NAME.common.u.net = &(NAME ## _net);				  \
 69	NAME.subj_cred = (CRED);					  \
 70	NAME.net.type = (T);						  \
 71	NAME.net.protocol = (P)
 72
 73#define DEFINE_AUDIT_SK(NAME, OP, CRED, SK)				     \
 74	DEFINE_AUDIT_NET(NAME, OP, CRED, SK, (SK)->sk_family, (SK)->sk_type, \
 75			 (SK)->sk_protocol)
 76
 77
 78struct aa_secmark {
 79	u8 audit;
 80	u8 deny;
 81	u32 secid;
 82	char *label;
 83};
 84
 85extern struct aa_sfs_entry aa_sfs_entry_network[];
 86extern struct aa_sfs_entry aa_sfs_entry_networkv9[];
 87
 88int aa_do_perms(struct aa_profile *profile, struct aa_policydb *policy,
 89		aa_state_t state, u32 request, struct aa_perms *p,
 90		struct apparmor_audit_data *ad);
 91/* passing in state returned by XXX_mediates_AF() */
 92aa_state_t aa_match_to_prot(struct aa_policydb *policy, aa_state_t state,
 93			    u32 request, u16 af, int type, int protocol,
 94			    struct aa_perms **p, const char **info);
 95void audit_net_cb(struct audit_buffer *ab, void *va);
 96int aa_profile_af_perm(struct aa_profile *profile,
 97		       struct apparmor_audit_data *ad,
 98		       u32 request, u16 family, int type, int protocol);
 99int 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);
102static 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, sk->sk_protocol);
109}
110int aa_sk_perm(const char *op, u32 request, struct sock *sk);
111
112int aa_sock_file_perm(const struct cred *subj_cred, struct aa_label *label,
113		      const char *op, u32 request,
114		      struct file *file);
115
116int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
117			   u32 secid, const struct sock *sk);
118
119#endif /* __AA_NET_H */