* $Id$

#ifndef _H_TABLE_H
#define _H_TABLE_H

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <arpa/inet.h>

#include "../../msg_parser.h"
#include "../../types.h"
#include "config.h"

struct s_table;
struct entry;
struct cell;
struct timer;

#include "sh_malloc.h"

#include "timer.h"
#include "lock.h"
#include "sip_msg.h"

#define T_UNDEFINED 	( (struct cell*) -1 )
#define T_NULL		( (struct cell*) 0 )

typedef struct retrans_buff
	char               *retr_buffer;
	int                  bufflen;

	struct sockaddr_in to;
	size_t tolen;

	/* a message can be linked just to retransmission and FR list */
	struct timer_link retr_timer;
	struct timer_link fr_timer;

	/*the cell that containes this retrans_buff*/
	struct cell* my_T;

	enum lists retr_list;
	/* set to status code if the buffer is a reply, 0 if request */
	int reply;


/* transaction context */

typedef struct cell
	/* linking data */
	struct cell*     next_cell;
	struct cell*     prev_cell;

	/* indicates which process is currently processing this transaction */
	process_bm_t	ref_bitmap;
	/* tells in which hash table entry the cell lives */
	unsigned int  hash_index;
	/* sequence number within hash collision slot */
	unsigned int  label;

	/* bindings to wait and delete timer */
	struct timer_link wait_tl;
	struct timer_link dele_tl;

	/*the transaction that is canceled (usefull only for CANCEL req)*/
	struct cell *T_canceled;

	/* useful data */
	/* UA Server */
	struct sip_msg 		*inbound_request;
	struct retrans_buff	outbound_response;
	unsigned int		status;
	str*				tag;
	unsigned int		inbound_request_isACKed;
	int					relaied_reply_branch;
	int					nr_of_outgoings;
	/* UA Clients */
	struct retrans_buff	*outbound_request[ MAX_FORK ];
	struct sip_msg		*inbound_response[ MAX_FORK ];
	/* unsigned int		outbound_request_isACKed[MAX_FORK]; */
	struct retrans_buff	*outbound_ack[ MAX_FORK ];

	/* protection against concurrent reply processing */
	ser_lock_t	reply_mutex;
	/* protection against concurrent ACK processing */
	ser_lock_t	ack_mutex;

	/* this is where destination is stored for picked branch;
	   good if a need to forward ACK later on
	struct sockaddr_in ack_to;

	/* scheduled for deletion ? */
	short damocles;

/* double-linked list of cells with hash synonyms */
typedef struct entry
   struct cell*       first_cell;
   struct cell*       last_cell;
   /* currently highest sequence number in a synonym list */
   unsigned int    next_label;
   /* sync mutex */
   ser_lock_t                 mutex;

/* transaction table */
struct s_table
   /* table of hash entries; each of them is a list of synonyms  */
   struct entry   entrys[ TABLE_ENTRIES ];
   /* table of timer lists */
   struct timer   timers[ NR_OF_TIMER_LISTS ];

struct s_table* init_hash_table();
void free_hash_table( struct s_table* hash_table );
void free_cell( struct cell* dead_cell );
struct cell*  build_cell( struct sip_msg* p_msg );
void remove_from_hash_table( struct s_table *hash_table, struct cell * p_cell );
void insert_into_hash_table( struct s_table *hash_table, struct cell * p_cell );
void insert_into_hash_table_unsafe( struct s_table *hash_table, struct cell * p_cell );