ut.h

性能优秀的SIP Proxy

/*
 * $Id: ut.h,v 1.4 2006/02/03 18:04:23 bogdan_iancu Exp $
 *
 * utilities
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of openser, a free SIP server.
 *
 * openser 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
 *
 * openser 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:
 * -------
 *  2003-02-13  added proto to uri2proxy (andrei)
 *  2003-04-09  uri2sock moved from uac.c (janakj)
 *  2003-04-14  added get_proto to determine protocol from uri unless
 *              specified explicitly (jiri)
 *  2003-07-07  get_proto takes now two protos as arguments (andrei)
 *              tls/sips support for get_proto & uri2proxy (andrei)
 */


#ifndef _TM_UT_H
#define _TM_UT_H


#include "../../proxy.h"
#include "../../str.h"
#include "../../parser/parse_uri.h"
#include "../../dprint.h"
#include "../../ut.h"
#include "../../ip_addr.h"
#include "../../error.h"
#include "../../forward.h"
#include "../../mem/mem.h"
#include "../../parser/msg_parser.h"

/* a forced_proto takes precedence if != PROTO_NONE */
inline static enum sip_protos get_proto(enum sip_protos force_proto,
										enum sip_protos proto)
{
	/* calculate transport protocol */
	switch(force_proto) {
		case PROTO_NONE: /* no protocol has been forced -- look at proto */
			switch(proto) {
				case PROTO_NONE:
					return PROTO_NONE;
				case PROTO_UDP:/* transport specified explicitly */
#ifdef USE_TCP
				case PROTO_TCP:
#endif
#ifdef USE_TLS
				case PROTO_TLS:
#endif
					return proto;
				default:
					LOG(L_ERR, "ERROR: get_proto: unsupported transport:"
						" %d\n", proto );
					return PROTO_NONE;
			}
		case PROTO_UDP: /* some protocol has been forced -- take it */
#ifdef USE_TCP
		case PROTO_TCP:
#endif
#ifdef USE_TLS
		case PROTO_TLS:
#endif
			return force_proto;
		default:
			LOG(L_ERR, "ERROR: get_proto: unsupported forced protocol: "
				"%d\n", force_proto);
			return PROTO_NONE;
	}
}



/*
 * Convert a URI into a proxy structure
 */
inline static struct proxy_l *uri2proxy( str *uri, int forced_proto )
{
	struct sip_uri parsed_uri;
	struct proxy_l *p;
	enum sip_protos proto;

	if (parse_uri(uri->s, uri->len, &parsed_uri) < 0) {
		LOG(L_ERR, "ERROR: uri2proxy: bad_uri: %.*s\n",
		    uri->len, uri->s );
		return 0;
	}
	
	if (parsed_uri.type==SIPS_URI_T &&
	((parsed_uri.proto!=PROTO_TCP) && (parsed_uri.proto!=PROTO_NONE)) ) {
		LOG(L_ERR, "ERROR: uri2proxy: bad transport  for sips uri: %d\n",
			parsed_uri.proto);
		return 0;
	}
	proto=parsed_uri.proto;

	proto = get_proto(forced_proto, proto);

	p = mk_proxy( &parsed_uri.host, parsed_uri.port_no, proto,
		(parsed_uri.type==SIPS_URI_T)?1:0 );
	if (p == 0) {
		LOG(L_ERR, "ERROR: uri2proxy: bad host name in URI <%.*s>\n",
			uri->len, ZSW(uri->s));
		return 0;
	}
	
	return p;
}


static inline int uri2su(str *uri, union sockaddr_union *to_su, int proto)
{
	struct proxy_l *proxy;

	proxy = uri2proxy(uri, proto);
	if (!proxy) {
		ser_error = E_BAD_ADDRESS;
		LOG(L_ERR, "ERROR: uri2sock: Can't create a dst proxy\n");
		return -1;
	}

	hostent2su(to_su, &proxy->host, proxy->addr_idx, 
		(proxy->port) ? proxy->port : SIP_PORT);
	proto = proxy->proto;

	free_proxy(proxy);
	pkg_free(proxy);
	return proto;
}



/*
 * Convert a URI into socket_info
 */
static inline struct socket_info *uri2sock(struct sip_msg* msg, str *uri,
									union sockaddr_union *to_su, int proto)
{
	struct socket_info* send_sock;

	if ( (proto=uri2su(uri, to_su, proto))==-1 )
		return 0;

	send_sock = get_send_socket(msg, to_su, proto);
	if (!send_sock) {
		LOG(L_ERR, "ERROR: uri2sock: no corresponding socket for af %d\n", 
		    to_su->s.sa_family);
		ser_error = E_NO_SOCKET;
	}

	return send_sock;
}


#endif /* _TM_UT_H */