/*
   * 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;
  };

  struct lsm_ioctlop_audit {
  	struct path path;
  	u16 cmd;
  };

  /* 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

  #define LSM_AUDIT_DATA_IOCTL_OP	11

  #define LSM_AUDIT_DATA_FILE	12

  	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;

  		struct lsm_ioctlop_audit *op;

  		struct file *file;

  	} 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