include/linux/lsm_audit.h

   1 /*
   2  * Common LSM logging functions
   3  * Heavily borrowed from selinux/avc.h
   4  *
   5  * Author : Etienne BASSET  <etienne.basset@ensta.org>
   6  *
   7  * All credits to : Stephen Smalley, <sds@epoch.ncsc.mil>
   8  * All BUGS to : Etienne BASSET  <etienne.basset@ensta.org>
   9  */
  10 #ifndef _LSM_COMMON_LOGGING_
  11 #define _LSM_COMMON_LOGGING_
  12
  13 #include <linux/stddef.h>
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/kdev_t.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/init.h>
  19 #include <linux/audit.h>
  20 #include <linux/in6.h>
  21 #include <linux/path.h>
  22 #include <linux/key.h>
  23 #include <linux/skbuff.h>
  24
  25 struct lsm_network_audit {
  26         int netif;
  27         struct sock *sk;
  28         u16 family;
  29         __be16 dport;
  30         __be16 sport;
  31         union {
  32                 struct {
  33                         __be32 daddr;
  34                         __be32 saddr;
  35                 } v4;
  36                 struct {
  37                         struct in6_addr daddr;
  38                         struct in6_addr saddr;
  39                 } v6;
  40         } fam;
  41 };
  42
  43 /* Auxiliary data to use in generating the audit record. */
  44 struct common_audit_data {
  45         char type;
  46 #define LSM_AUDIT_DATA_PATH     1
  47 #define LSM_AUDIT_DATA_NET      2
  48 #define LSM_AUDIT_DATA_CAP      3
  49 #define LSM_AUDIT_DATA_IPC      4
  50 #define LSM_AUDIT_DATA_TASK     5
  51 #define LSM_AUDIT_DATA_KEY      6
  52 #define LSM_AUDIT_DATA_NONE     7
  53 #define LSM_AUDIT_DATA_KMOD     8
  54 #define LSM_AUDIT_DATA_INODE    9
  55 #define LSM_AUDIT_DATA_DENTRY   10
  56         struct task_struct *tsk;
  57         union   {
  58                 struct path path;
  59                 struct dentry *dentry;
  60                 struct inode *inode;
  61                 struct lsm_network_audit *net;
  62                 int cap;
  63                 int ipc_id;
  64                 struct task_struct *tsk;
  65 #ifdef CONFIG_KEYS
  66                 struct {
  67                         key_serial_t key;
  68                         char *key_desc;
  69                 } key_struct;
  70 #endif
  71                 char *kmod_name;
  72         } u;
  73         /* this union contains LSM specific data */
  74         union {
  75 #ifdef CONFIG_SECURITY_SMACK
  76                 struct smack_audit_data *smack_audit_data;
  77 #endif
  78 #ifdef CONFIG_SECURITY_SELINUX
  79                 struct selinux_audit_data *selinux_audit_data;
  80 #endif
  81 #ifdef CONFIG_SECURITY_APPARMOR
  82                 struct apparmor_audit_data *apparmor_audit_data;
  83 #endif
  84         }; /* per LSM data pointer union */
  85 };
  86
  87 #define v4info fam.v4
  88 #define v6info fam.v6
  89
  90 int ipv4_skb_to_auditdata(struct sk_buff *skb,
  91                 struct common_audit_data *ad, u8 *proto);
  92
  93 int ipv6_skb_to_auditdata(struct sk_buff *skb,
  94                 struct common_audit_data *ad, u8 *proto);
  95
  96 /* Initialize an LSM audit data structure. */
  97 #define COMMON_AUDIT_DATA_INIT(_d, _t) \
  98         { memset((_d), 0, sizeof(struct common_audit_data)); \
  99          (_d)->type = LSM_AUDIT_DATA_##_t; }
 100
 101 void common_lsm_audit(struct common_audit_data *a,
 102         void (*pre_audit)(struct audit_buffer *, void *),
 103         void (*post_audit)(struct audit_buffer *, void *));
 104
 105 #endif