apparmor/include/net.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * AppArmor security module
0004  *
0005  * This file contains AppArmor network mediation definitions.
0006  *
0007  * Copyright (C) 1998-2008 Novell/SUSE
0008  * Copyright 2009-2017 Canonical Ltd.
0009  */
0010
0011 #ifndef __AA_NET_H
0012 #define __AA_NET_H
0013
0014 #include <net/sock.h>
0015 #include <linux/path.h>
0016
0017 #include "apparmorfs.h"
0018 #include "label.h"
0019 #include "perms.h"
0020 #include "policy.h"
0021
0022 #define AA_MAY_SEND     AA_MAY_WRITE
0023 #define AA_MAY_RECEIVE      AA_MAY_READ
0024
0025 #define AA_MAY_SHUTDOWN     AA_MAY_DELETE
0026
0027 #define AA_MAY_CONNECT      AA_MAY_OPEN
0028 #define AA_MAY_ACCEPT       0x00100000
0029
0030 #define AA_MAY_BIND     0x00200000
0031 #define AA_MAY_LISTEN       0x00400000
0032
0033 #define AA_MAY_SETOPT       0x01000000
0034 #define AA_MAY_GETOPT       0x02000000
0035
0036 #define NET_PERMS_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE |    \
0037             AA_MAY_SHUTDOWN | AA_MAY_BIND | AA_MAY_LISTEN |   \
0038             AA_MAY_CONNECT | AA_MAY_ACCEPT | AA_MAY_SETATTR | \
0039             AA_MAY_GETATTR | AA_MAY_SETOPT | AA_MAY_GETOPT)
0040
0041 #define NET_FS_PERMS (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE |    \
0042               AA_MAY_SHUTDOWN | AA_MAY_CONNECT | AA_MAY_RENAME |\
0043               AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_CHMOD |  \
0044               AA_MAY_CHOWN | AA_MAY_CHGRP | AA_MAY_LOCK |   \
0045               AA_MAY_MPROT)
0046
0047 #define NET_PEER_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CONNECT |  \
0048                AA_MAY_ACCEPT)
0049 struct aa_sk_ctx {
0050     struct aa_label *label;
0051     struct aa_label *peer;
0052 };
0053
0054 #define SK_CTX(X) ((X)->sk_security)
0055 #define SOCK_ctx(X) SOCK_INODE(X)->i_security
0056 #define DEFINE_AUDIT_NET(NAME, OP, SK, F, T, P)               \
0057     struct lsm_network_audit NAME ## _net = { .sk = (SK),         \
0058                           .family = (F)};     \
0059     DEFINE_AUDIT_DATA(NAME,                       \
0060               ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
0061                              LSM_AUDIT_DATA_NONE, \
0062               OP);                        \
0063     NAME.u.net = &(NAME ## _net);                     \
0064     aad(&NAME)->net.type = (T);                   \
0065     aad(&NAME)->net.protocol = (P)
0066
0067 #define DEFINE_AUDIT_SK(NAME, OP, SK)                   \
0068     DEFINE_AUDIT_NET(NAME, OP, SK, (SK)->sk_family, (SK)->sk_type,  \
0069              (SK)->sk_protocol)
0070
0071
0072 #define af_select(FAMILY, FN, DEF_FN)       \
0073 ({                      \
0074     int __e;                \
0075     switch ((FAMILY)) {         \
0076     default:                \
0077         __e = DEF_FN;           \
0078     }                   \
0079     __e;                    \
0080 })
0081
0082 struct aa_secmark {
0083     u8 audit;
0084     u8 deny;
0085     u32 secid;
0086     char *label;
0087 };
0088
0089 extern struct aa_sfs_entry aa_sfs_entry_network[];
0090
0091 void audit_net_cb(struct audit_buffer *ab, void *va);
0092 int aa_profile_af_perm(struct aa_profile *profile, struct common_audit_data *sa,
0093                u32 request, u16 family, int type);
0094 int aa_af_perm(struct aa_label *label, const char *op, u32 request, u16 family,
0095            int type, int protocol);
0096 static inline int aa_profile_af_sk_perm(struct aa_profile *profile,
0097                     struct common_audit_data *sa,
0098                     u32 request,
0099                     struct sock *sk)
0100 {
0101     return aa_profile_af_perm(profile, sa, request, sk->sk_family,
0102                   sk->sk_type);
0103 }
0104 int aa_sk_perm(const char *op, u32 request, struct sock *sk);
0105
0106 int aa_sock_file_perm(struct aa_label *label, const char *op, u32 request,
0107               struct socket *sock);
0108
0109 int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
0110                u32 secid, const struct sock *sk);
0111
0112 #endif /* __AA_NET_H */