lsm_audit.h

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/*
 * Common LSM logging functions
 * Heavily borrowed from selinux/avc.h
 *
 * Author : Etienne BASSET  <[email protected]>
 *
 * All credits to : Stephen Smalley, <[email protected]>
 * All BUGS to : Etienne BASSET  <[email protected]>
 */
#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