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