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 	union 	{
57 		struct path path;
58 		struct dentry *dentry;
59 		struct inode *inode;
60 		struct lsm_network_audit *net;
61 		int cap;
62 		int ipc_id;
63 		struct task_struct *tsk;
64 #ifdef CONFIG_KEYS
65 		struct {
66 			key_serial_t key;
67 			char *key_desc;
68 		} key_struct;
69 #endif
70 		char *kmod_name;
71 	} u;
72 	/* this union contains LSM specific data */
73 	union {
74 #ifdef CONFIG_SECURITY_SMACK
75 		struct smack_audit_data *smack_audit_data;
76 #endif
77 #ifdef CONFIG_SECURITY_SELINUX
78 		struct selinux_audit_data *selinux_audit_data;
79 #endif
80 #ifdef CONFIG_SECURITY_APPARMOR
81 		struct apparmor_audit_data *apparmor_audit_data;
82 #endif
83 	}; /* per LSM data pointer union */
84 };
85 
86 #define v4info fam.v4
87 #define v6info fam.v6
88 
89 int ipv4_skb_to_auditdata(struct sk_buff *skb,
90 		struct common_audit_data *ad, u8 *proto);
91 
92 int ipv6_skb_to_auditdata(struct sk_buff *skb,
93 		struct common_audit_data *ad, u8 *proto);
94 
95 void common_lsm_audit(struct common_audit_data *a,
96 	void (*pre_audit)(struct audit_buffer *, void *),
97 	void (*post_audit)(struct audit_buffer *, void *));
98 
99 #endif
100