root/include/linux/lsm_audit.h

/*
 * Common LSM logging functions
 * Heavily borrowed from selinux/avc.h
 *
 * Author : Etienne BASSET  <etienne.basset@ensta.org>
 *
 * All credits to : Stephen Smalley, <sds@epoch.ncsc.mil>
 * All BUGS to : Etienne BASSET  <etienne.basset@ensta.org>
 */
#ifndef _LSM_COMMON_LOGGING_
#define _LSM_COMMON_LOGGING_

#include <linux/stddef.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/kdev_t.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/audit.h>
#include <linux/in6.h>
#include <linux/path.h>
#include <linux/key.h>
#include <linux/skbuff.h>

struct lsm_network_audit {
        int netif;
        struct sock *sk;
        u16 family;
        __be16 dport;
        __be16 sport;
        union {
                struct {
                        __be32 daddr;
                        __be32 saddr;
                } v4;
                struct {
                        struct in6_addr daddr;
                        struct in6_addr saddr;
                } v6;
        } fam;
};

/* Auxiliary data to use in generating the audit record. */
struct common_audit_data {
        char type;
#define LSM_AUDIT_DATA_PATH     1
#define LSM_AUDIT_DATA_NET      2
#define LSM_AUDIT_DATA_CAP      3
#define LSM_AUDIT_DATA_IPC      4
#define LSM_AUDIT_DATA_TASK     5
#define LSM_AUDIT_DATA_KEY      6
#define LSM_AUDIT_DATA_NONE     7
#define LSM_AUDIT_DATA_KMOD     8
#define LSM_AUDIT_DATA_INODE    9
#define LSM_AUDIT_DATA_DENTRY   10
        union   {
                struct path path;
                struct dentry *dentry;
                struct inode *inode;
                struct lsm_network_audit *net;
                int cap;
                int ipc_id;
                struct task_struct *tsk;
#ifdef CONFIG_KEYS
                struct {
                        key_serial_t key;
                        char *key_desc;
                } key_struct;
#endif
                char *kmod_name;
        } u;
        /* this union contains LSM specific data */
        union {
#ifdef CONFIG_SECURITY_SMACK
                struct smack_audit_data *smack_audit_data;
#endif
#ifdef CONFIG_SECURITY_SELINUX
                struct selinux_audit_data *selinux_audit_data;
#endif
#ifdef CONFIG_SECURITY_APPARMOR
                struct apparmor_audit_data *apparmor_audit_data;
#endif
        }; /* per LSM data pointer union */
};

#define v4info fam.v4
#define v6info fam.v6

int ipv4_skb_to_auditdata(struct sk_buff *skb,
                struct common_audit_data *ad, u8 *proto);

int ipv6_skb_to_auditdata(struct sk_buff *skb,
                struct common_audit_data *ad, u8 *proto);

void common_lsm_audit(struct common_audit_data *a,
        void (*pre_audit)(struct audit_buffer *, void *),
        void (*post_audit)(struct audit_buffer *, void *));

#endif