ec_conntrack.h

#ifndef ETTERCAP_CONNTRACK_H
#define ETTERCAP_CONNTRACK_H

#include <ec_profiles.h>
#include <ec_connbuf.h>

/* conntrack hook definition */
struct ct_hook_list {
   void (*func)(struct packet_object *po);
   SLIST_ENTRY (ct_hook_list) next;
};

/* conntrack object */
struct conn_object {

   /* last updated (for connection timeout) */
   struct timeval ts;

   /* mac addresses */
   u_int8 L2_addr1[MEDIA_ADDR_LEN];
   u_int8 L2_addr2[MEDIA_ADDR_LEN];
   
   /* ip addresses */
   struct ip_addr L3_addr1;
   struct ip_addr L3_addr2;
   
   /* port numbers */
   u_int16 L4_addr1;
   u_int16 L4_addr2;
   u_int8 L4_proto;

   /* buffered data */
   struct conn_buf data;

   /* byte count since the creation */
   u_int32 xferred;  /* XXX: remove it some day */
   u_int32 tx;       /* from 1 to 2 */
   u_int32 rx;       /* from 2 to 1 */
   
   /* connection status */
   int status;

   /* flags for injection/modifications */
   int flags;

   /* username and password */
   struct dissector_info DISSECTOR;

   /* hookpoint to receive only packet of this connection */
   SLIST_HEAD(, ct_hook_list) hook_head;
};

struct conn_tail {
   struct conn_object *co; 
   struct conn_hash_search *cs;
   TAILQ_ENTRY(conn_tail) next;
};


enum {
   CONN_IDLE      = 0,
   CONN_OPENING   = 1,
   CONN_OPEN      = 2,
   CONN_ACTIVE    = 3,
   CONN_CLOSING   = 4,
   CONN_CLOSED    = 5,
   CONN_KILLED    = 6,
};

enum {
   CONN_INJECTED = 1,
   CONN_MODIFIED = 2,
   CONN_VIEWING  = 4,
};

/* exported functions */
EC_API_EXTERN void * conntrack_print(int mode, void *list, char **desc, size_t len);
EC_API_EXTERN void * conntrack_get(int mode, void *list, struct conn_object **conn);
EC_API_EXTERN int conntrack_protostr(struct conn_object *conn, char *pstr, int len);
EC_API_EXTERN int conntrack_flagstr(struct conn_object *conn, char *pstr, int len);
EC_API_EXTERN int conntrack_statusstr(struct conn_object *conn, char *pstr, int len);
EC_API_EXTERN int conntrack_countrystr(struct conn_object *conn, char *pstr, int len);
EC_API_EXTERN EC_THREAD_FUNC(conntrack_timeouter); 
EC_API_EXTERN void conntrack_purge(void);

EC_API_EXTERN int conntrack_hook_packet_add(struct packet_object *po, void (*func)(struct packet_object *po));
EC_API_EXTERN int conntrack_hook_packet_del(struct packet_object *po, void (*func)(struct packet_object *po));
EC_API_EXTERN int conntrack_hook_conn_add(struct conn_object *co, void (*func)(struct packet_object *po));
EC_API_EXTERN int conntrack_hook_conn_del(struct conn_object *co, void (*func)(struct packet_object *po));

#endif

/* EOF */

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