t_msgbuilder.h

用来作为linux中SIP SERVER,完成VOIP网络电话中服务器的功能

/*
 * $Id: t_msgbuilder.h,v 1.15 2004/08/24 09:00:43 janakj Exp $
 *
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of ser, a free SIP server.
 *
 * ser is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * For a license to use the ser software under conditions
 * other than those described here, or to purchase support for this
 * software, please contact iptel.org by e-mail at the following addresses:
 *    [e-mail]
 *
 * ser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * History:
 * --------
 *  2004-02-11  FIFO/CANCEL + alignments (hash=f(callid,cseq)) (uli+jiri)
 */


#ifndef _MSGBUILDER_H
#define _MSGBUILDER_H

#include "../../ip_addr.h"
#include "defs.h"
#include "dlg.h"


#define CSEQ "CSeq: "
#define CSEQ_LEN (sizeof(CSEQ)-1)
#define TO "To: "
#define TO_LEN (sizeof(TO)-1)
#define CALLID "Call-ID: "
#define CALLID_LEN (sizeof(CALLID)-1)
#define FROM "From: "
#define FROM_LEN (sizeof(FROM)-1)
#define FROMTAG ";tag="
#define FROMTAG_LEN (sizeof(FROMTAG)-1)
#define TOTAG ";tag="
#define TOTAG_LEN (sizeof(TOTAG)-1)


/* convenience macros */
#define memapp(_d,_s,_len) \
	do{\
		memcpy((_d),(_s),(_len));\
		(_d) += (_len);\
	}while(0);

#define  append_mem_block(_d,_s,_len) \
	do{\
		memcpy((_d),(_s),(_len));\
		(_d) += (_len);\
	}while(0);

char *build_local(struct cell *Trans, unsigned int branch,
	unsigned int *len, char *method, int method_len, str *to);

char *build_uac_request(  str msg_type, str dst, str from,
	str fromtag, int cseq, str callid, str headers, 
	str body, int branch,
	struct cell *t, unsigned int *len);


/*
 * The function creates an ACK to 200 OK. Route set will be created
 * and parsed and next_hop parameter will contain uri the which the
 * request should be send. The function is used by tm when it generates
 * local ACK to 200 OK (on behalf of applications using uac
 */
char *build_dlg_ack(struct sip_msg* rpl, struct cell *Trans, unsigned int branch,
		    str* to, unsigned int *len, str *next_hop);


/*
 * Create a request
 */
char* build_uac_req(str* method, str* headers, str* body, dlg_t* dialog, int branch, 
		    struct cell *t, int* len, struct socket_info* send_sock);


int t_calc_branch(struct cell *t,
	int b, char *branch, int *branch_len);

/* exported minimum functions for use in t_cancel */
char* print_callid_mini(char* target, str callid);
char* print_cseq_mini(char* target, str* cseq, str* method);

#endif