linphonecore.c

/*
linphone
Copyright (C) 2000  Simon MORLAT (simon.morlat@linphone.org)

This program 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.

This program 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.
*/

#include "linphonecore.h"
#include "sipsetup.h"
#include "lpconfig.h"
#include "private.h"
#include "mediastreamer2/mediastream.h"
#include "mediastreamer2/msvolume.h"
#include "mediastreamer2/msequalizer.h"

#include <ortp/telephonyevents.h>


#ifdef INET6
#ifndef WIN32
#include <netdb.h>
#endif
#endif

/*#define UNSTANDART_GSM_11K 1*/

static const char *liblinphone_version=LIBLINPHONE_VERSION;

#include "enum.h"

void linphone_core_get_local_ip(LinphoneCore *lc, const char *dest, char *result);
static void apply_nat_settings(LinphoneCore *lc);
static void toggle_video_preview(LinphoneCore *lc, bool_t val);

/* relative path where is stored local ring*/
#define LOCAL_RING "rings/oldphone.wav"
/* same for remote ring (ringback)*/
#define REMOTE_RING "ringback.wav"

extern SalCallbacks linphone_sal_callbacks;

void lc_callback_obj_init(LCCallbackObj *obj,LinphoneCoreCbFunc func,void* ud)
{
  obj->_func=func;
  obj->_user_data=ud;
}

int lc_callback_obj_invoke(LCCallbackObj *obj, LinphoneCore *lc){
	if (obj->_func!=NULL) obj->_func(lc,obj->_user_data);
	return 0;
}


static MSList *make_codec_list(const MSList *codecs){
	MSList *l=NULL;
	const MSList *it;
	for(it=codecs;it!=NULL;it=it->next){
		PayloadType *pt=(PayloadType*)it->data;
		if (pt->flags & PAYLOAD_TYPE_ENABLED){
			l=ms_list_append(l,payload_type_clone(pt));
		}
	}
	return l;
}

static SalMediaDescription *create_local_media_description(LinphoneCore *lc, 
    		const char *localip, const char *username){
	MSList *l;
	PayloadType *pt;
	SalMediaDescription *md=sal_media_description_new();
	md->nstreams=1;
	strncpy(md->addr,localip,sizeof(md->addr));
	strncpy(md->username,username,sizeof(md->username));
	/*set audio capabilities */
	strncpy(md->streams[0].addr,localip,sizeof(md->streams[0].addr));
	md->streams[0].port=linphone_core_get_audio_port(lc);
	md->streams[0].proto=SalProtoRtpAvp;
	md->streams[0].type=SalAudio;
	l=make_codec_list(lc->codecs_conf.audio_codecs);
	pt=payload_type_clone(rtp_profile_get_payload_from_mime(&av_profile,"telephone-event"));
	l=ms_list_append(l,pt);
	md->streams[0].payloads=l;
	
	if (lc->dw_audio_bw>0)
		md->streams[0].bandwidth=lc->dw_audio_bw;

	if (linphone_core_video_enabled (lc)){
		md->nstreams++;
		md->streams[1].port=linphone_core_get_video_port(lc);
		md->streams[1].proto=SalProtoRtpAvp;
		md->streams[1].type=SalVideo;
		l=make_codec_list(lc->codecs_conf.video_codecs);
		md->streams[1].payloads=l;
		if (lc->dw_video_bw)
			md->streams[1].bandwidth=lc->dw_video_bw;
	}
	return md;
}

static void linphone_call_init_common(LinphoneCall *call, LinphoneAddress *from, LinphoneAddress *to){
	call->state=LCStateInit;
	call->start_time=time(NULL);
	call->media_start_time=0;
	call->log=linphone_call_log_new(call, from, to);
	linphone_core_notify_all_friends(call->core,LINPHONE_STATUS_ONTHEPHONE);
	if (linphone_core_get_firewall_policy(call->core)==LINPHONE_POLICY_USE_STUN)
		linphone_core_run_stun_tests(call->core,call);
}

static void discover_mtu(LinphoneCore *lc, const char *remote){
	int mtu;
	if (lc->net_conf.mtu==0	){
		/*attempt to discover mtu*/
		mtu=ms_discover_mtu(remote);
		if (mtu>0){
			ms_set_mtu(mtu);
			ms_message("Discovered mtu is %i, RTP payload max size is %i",
				mtu, ms_get_payload_max_size());
		}
	}
}

LinphoneCall * linphone_call_new_outgoing(struct _LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to)
{
	LinphoneCall *call=ms_new0(LinphoneCall,1);
	call->dir=LinphoneCallOutgoing;
	call->op=sal_op_new(lc->sal);
	sal_op_set_user_pointer(call->op,call);
	call->core=lc;
	linphone_core_get_local_ip(lc,linphone_address_get_domain(to),call->localip);
	call->localdesc=create_local_media_description (lc,call->localip,
		linphone_address_get_username(from));
	linphone_call_init_common(call,from,to);
	discover_mtu(lc,linphone_address_get_domain (to));
	return call;
}

LinphoneCall * linphone_call_new_incoming(LinphoneCore *lc, LinphoneAddress *from, LinphoneAddress *to, SalOp *op){
	LinphoneCall *call=ms_new0(LinphoneCall,1);
	LinphoneAddress *me=linphone_core_get_primary_contact_parsed(lc);

	call->dir=LinphoneCallIncoming;
	sal_op_set_user_pointer(op,call);
	call->op=op;
	call->core=lc;
	
	linphone_address_clean(from);
	linphone_core_get_local_ip(lc,linphone_address_get_domain(from),call->localip);
	call->localdesc=create_local_media_description (lc,call->localip,
	    linphone_address_get_username(me));
	linphone_call_init_common(call, from, to);
	discover_mtu(lc,linphone_address_get_domain(from));
	linphone_address_destroy(me);
	return call;
}

void linphone_call_destroy(LinphoneCall *obj)
{
	linphone_core_notify_all_friends(obj->core,obj->core->prev_mode);
	linphone_call_log_completed(obj->log,obj);
	linphone_core_update_allocated_audio_bandwidth(obj->core);
	if (obj->op!=NULL) sal_op_release(obj->op);
	if (obj->resultdesc!=NULL) sal_media_description_unref(obj->resultdesc);
	if (obj->localdesc!=NULL) sal_media_description_unref(obj->localdesc);
	ms_free(obj);
}

/*prevent a gcc bug with %c*/
static size_t my_strftime(char *s, size_t max, const char  *fmt,  const struct tm *tm){
#if !defined(_WIN32_WCE)
	return strftime(s, max, fmt, tm);
#else
	return 0;
	/*FIXME*/
#endif /*_WIN32_WCE*/
}

static void set_call_log_date(LinphoneCallLog *cl, const struct tm *loctime){
	my_strftime(cl->start_date,sizeof(cl->start_date),"%c",loctime);
}

LinphoneCallLog * linphone_call_log_new(LinphoneCall *call, LinphoneAddress *from, LinphoneAddress *to){
	LinphoneCallLog *cl=ms_new0(LinphoneCallLog,1);
	struct tm loctime;
	cl->dir=call->dir;
#ifdef WIN32
#if !defined(_WIN32_WCE)
	loctime=*localtime(&call->start_time);
	/*FIXME*/
#endif /*_WIN32_WCE*/
#else
	localtime_r(&call->start_time,&loctime);
#endif
	set_call_log_date(cl,&loctime);
	cl->from=from;
	cl->to=to;
	return cl;
}

static void call_logs_write_to_config_file(LinphoneCore *lc){
	MSList *elem;
	char logsection[32];
	int i;
	char *tmp;
	LpConfig *cfg=lc->config;

	if (!lc->ready) return;
	
	for(i=0,elem=lc->call_logs;elem!=NULL;elem=elem->next,++i){
		LinphoneCallLog *cl=(LinphoneCallLog*)elem->data;
		snprintf(logsection,sizeof(logsection),"call_log_%i",i);
		lp_config_set_int(cfg,logsection,"dir",cl->dir);
		lp_config_set_int(cfg,logsection,"status",cl->status);
		tmp=linphone_address_as_string(cl->from);
		lp_config_set_string(cfg,logsection,"from",tmp);
		ms_free(tmp);
		tmp=linphone_address_as_string(cl->to);
		lp_config_set_string(cfg,logsection,"to",tmp);
		ms_free(tmp);
		lp_config_set_string(cfg,logsection,"start_date",cl->start_date);
		lp_config_set_int(cfg,logsection,"duration",cl->duration);
		if (cl->refkey) lp_config_set_string(cfg,logsection,"refkey",cl->refkey);
	}
	for(;i<lc->max_call_logs;++i){
		snprintf(logsection,sizeof(logsection),"call_log_%i",i);
		lp_config_clean_section(cfg,logsection);
	}
}

static void call_logs_read_from_config_file(LinphoneCore *lc){
	char logsection[32];
	int i;
	const char *tmp;
	LpConfig *cfg=lc->config;
	for(i=0;;++i){
		snprintf(logsection,sizeof(logsection),"call_log_%i",i);
		if (lp_config_has_section(cfg,logsection)){
			LinphoneCallLog *cl=ms_new0(LinphoneCallLog,1);
			cl->dir=lp_config_get_int(cfg,logsection,"dir",0);
			cl->status=lp_config_get_int(cfg,logsection,"status",0);
			tmp=lp_config_get_string(cfg,logsection,"from",NULL);
			if (tmp) cl->from=linphone_address_new(tmp);
			tmp=lp_config_get_string(cfg,logsection,"to",NULL);
			if (tmp) cl->to=linphone_address_new(tmp);
			tmp=lp_config_get_string(cfg,logsection,"start_date",NULL);
			if (tmp) strncpy(cl->start_date,tmp,sizeof(cl->start_date));
			cl->duration=lp_config_get_int(cfg,logsection,"duration",0);
			tmp=lp_config_get_string(cfg,logsection,"refkey",NULL);
			if (tmp) cl->refkey=ms_strdup(tmp);
			lc->call_logs=ms_list_append(lc->call_logs,cl);
		}else break;	
	}
}


void linphone_call_log_completed(LinphoneCallLog *calllog, LinphoneCall *call){
	LinphoneCore *lc=call->core;
	
	calllog->duration=time(NULL)-call->start_time;
	switch(call->state){
		case LCStateInit:
			calllog->status=LinphoneCallAborted;
			break;
		case LCStateRinging:
			if (calllog->dir==LinphoneCallIncoming){
				char *info;
				calllog->status=LinphoneCallMissed;
				lc->missed_calls++;
				info=ortp_strdup_printf(ngettext("You have missed %i call.",
                            "You have missed %i calls.", lc->missed_calls),
                        lc->missed_calls);
				lc->vtable.display_status(lc,info);
				ms_free(info);
			}
			else calllog->status=LinphoneCallAborted;
			break;
		case LCStateAVRunning:
			calllog->status=LinphoneCallSuccess;
			break;
	}
	lc->call_logs=ms_list_append(lc->call_logs,(void *)calllog);
	if (ms_list_size(lc->call_logs)>lc->max_call_logs){
		MSList *elem;
		elem=lc->call_logs;
		linphone_call_log_destroy((LinphoneCallLog*)elem->data);
		lc->call_logs=ms_list_remove_link(lc->call_logs,elem);
	}
	if (lc->vtable.call_log_updated!=NULL){
		lc->vtable.call_log_updated(lc,calllog);
	}
	call_logs_write_to_config_file(lc);
}

/**
 * @addtogroup call_logs
 * @{
**/

/**
 * Returns a human readable string describing the call.
 * 
 * @note: the returned char* must be freed by the application (use ms_free()).
**/
char * linphone_call_log_to_str(LinphoneCallLog *cl){
	char *status;
	char *tmp;
	char *from=linphone_address_as_string (cl->from);
	char *to=linphone_address_as_string (cl->to);
	switch(cl->status){
		case LinphoneCallAborted:
			status=_("aborted");
			break;
		case LinphoneCallSuccess:
			status=_("completed");
			break;
		case LinphoneCallMissed:
			status=_("missed");
			break;
		default:
			status="unknown";
	}
	tmp=ortp_strdup_printf(_("%s at %s\nFrom: %s\nTo: %s\nStatus: %s\nDuration: %i mn %i sec\n"),
			(cl->dir==LinphoneCallIncoming) ? _("Incoming call") : _("Outgoing call"),
			cl->start_date,
			from,
			to,
			status,
			cl->duration/60,
			cl->duration%60);
	ms_free(from);
	ms_free(to);
	return tmp;
}

void linphone_call_log_set_user_pointer(LinphoneCallLog *cl, void *up){
	cl->user_pointer=up;
}

void *linphone_call_log_get_user_pointer(const LinphoneCallLog *cl){
	return cl->user_pointer;
}



/**
 * Associate a persistent reference key to the call log.
 *
 * The reference key can be for example an id to an external database.
 * It is stored in the config file, thus can survive to process exits/restarts.
 *
**/
void linphone_call_log_set_ref_key(LinphoneCallLog *cl, const char *refkey){
	if (cl->refkey!=NULL){
		ms_free(cl->refkey);
		cl->refkey=NULL;
	}
	if (refkey) cl->refkey=ms_strdup(refkey);
	call_logs_write_to_config_file(cl->lc);
}

/**
 * Get the persistent reference key associated to the call log.
 *
 * The reference key can be for example an id to an external database.
 * It is stored in the config file, thus can survive to process exits/restarts.
 *
**/
const char *linphone_call_log_get_ref_key(const LinphoneCallLog *cl){
	return cl->refkey;
}

/** @} */

void linphone_call_log_destroy(LinphoneCallLog *cl){
	if (cl->from!=NULL) linphone_address_destroy(cl->from);
	if (cl->to!=NULL) linphone_address_destroy(cl->to);
	if (cl->refkey!=NULL) ms_free(cl->refkey);
	ms_free(cl);
}

int linphone_core_get_current_call_duration(const LinphoneCore *lc){
	LinphoneCall *call=lc->call;
	if (call==NULL) return 0;
	if (call->media_start_time==0) return 0;
	return time(NULL)-call->media_start_time;
}

const LinphoneAddress *linphone_core_get_remote_uri(LinphoneCore *lc){
	LinphoneCall *call=lc->call;
	if (call==NULL) return 0;
	return call->dir==LinphoneCallIncoming ? call->log->from : call->log->to;
}

/**
 * Enable logs in supplied FILE*.
 *
 * @ingroup misc
 *
 * @param file a C FILE* where to fprintf logs. If null stdout is used.
 * 
**/
void linphone_core_enable_logs(FILE *file){
	if (file==NULL) file=stdout;
	ortp_set_log_file(file);
	ortp_set_log_level_mask(ORTP_MESSAGE|ORTP_WARNING|ORTP_ERROR|ORTP_FATAL);
}

/**
 * Enable logs through the user's supplied log callback.
 *
 * @ingroup misc
 *
 * @param logfunc The address of a OrtpLogFunc callback whose protoype is
 *            	  typedef void (*OrtpLogFunc)(OrtpLogLevel lev, const char *fmt, va_list args);
 * 
**/
void linphone_core_enable_logs_with_cb(OrtpLogFunc logfunc){
	ortp_set_log_level_mask(ORTP_MESSAGE|ORTP_WARNING|ORTP_ERROR|ORTP_FATAL);
	ortp_set_log_handler(logfunc);
}

/**
 * Entirely disable logging.
 *
 * @ingroup misc
**/
void linphone_core_disable_logs(){
	ortp_set_log_level_mask(ORTP_ERROR|ORTP_FATAL);
}


static void
net_config_read (LinphoneCore *lc)
{
	int tmp;
	const char *tmpstr;
	LpConfig *config=lc->config;

	tmp=lp_config_get_int(config,"net","download_bw",0);
	linphone_core_set_download_bandwidth(lc,tmp);
	tmp=lp_config_get_int(config,"net","upload_bw",0);
	linphone_core_set_upload_bandwidth(lc,tmp);
	linphone_core_set_stun_server(lc,lp_config_get_string(config,"net","stun_server",NULL));
	tmpstr=lp_config_get_string(lc->config,"net","nat_address",NULL);
	if (tmpstr!=NULL && (strlen(tmpstr)<1)) tmpstr=NULL;
	linphone_core_set_nat_address(lc,tmpstr);
	tmp=lp_config_get_int(lc->config,"net","firewall_policy",0);
	linphone_core_set_firewall_policy(lc,tmp);
	tmp=lp_config_get_int(lc->config,"net","nat_sdp_only",0);
	lc->net_conf.nat_sdp_only=tmp;
	tmp=lp_config_get_int(lc->config,"net","mtu",0);
	linphone_core_set_mtu(lc,tmp);
}

static void build_sound_devices_table(LinphoneCore *lc){
	const char **devices;
	const char **old;
	int ndev;
	int i;
	const MSList *elem=ms_snd_card_manager_get_list(ms_snd_card_manager_get());
	ndev=ms_list_size(elem);
	devices=ms_malloc((ndev+1)*sizeof(const char *));
	for (i=0;elem!=NULL;elem=elem->next,i++){
		devices[i]=ms_snd_card_get_string_id((MSSndCard *)elem->data);
	}
	devices[ndev]=NULL;
	old=lc->sound_conf.cards;
	lc->sound_conf.cards=devices;
	if (old!=NULL) ms_free(old);
}

static void sound_config_read(LinphoneCore *lc)
{
	/*int tmp;*/
	const char *tmpbuf;
	const char *devid;
#ifdef __linux
	/*alsadev let the user use custom alsa device within linphone*/
	devid=lp_config_get_string(lc->config,"sound","alsadev",NULL);
	if (devid){
		MSSndCard *card=ms_alsa_card_new_custom(devid,devid);
		ms_snd_card_manager_add_card(ms_snd_card_manager_get(),card);
	}
#endif
	/* retrieve all sound devices */
	build_sound_devices_table(lc);

	devid=lp_config_get_string(lc->config,"sound","playback_dev_id",NULL);
	linphone_core_set_playback_device(lc,devid);

	devid=lp_config_get_string(lc->config,"sound","ringer_dev_id",NULL);
	linphone_core_set_ringer_device(lc,devid);

	devid=lp_config_get_string(lc->config,"sound","capture_dev_id",NULL);
	linphone_core_set_capture_device(lc,devid);

/*
	tmp=lp_config_get_int(lc->config,"sound","play_lev",80);
	linphone_core_set_play_level(lc,tmp);
	tmp=lp_config_get_int(lc->config,"sound","ring_lev",80);
	linphone_core_set_ring_level(lc,tmp);
	tmp=lp_config_get_int(lc->config,"sound","rec_lev",80);
	linphone_core_set_rec_level(lc,tmp);
	tmpbuf=lp_config_get_string(lc->config,"sound","source","m");
	linphone_core_set_sound_source(lc,tmpbuf[0]);
*/

	tmpbuf=PACKAGE_SOUND_DIR "/" LOCAL_RING;
	tmpbuf=lp_config_get_string(lc->config,"sound","local_ring",tmpbuf);
	if (ortp_file_exist(tmpbuf)==-1) {
		tmpbuf=PACKAGE_SOUND_DIR "/" LOCAL_RING;
	}
	if (strstr(tmpbuf,".wav")==NULL){
		/* it currently uses old sound files, so replace them */
		tmpbuf=PACKAGE_SOUND_DIR "/" LOCAL_RING;
	}

	linphone_core_set_ring(lc,tmpbuf);

	tmpbuf=PACKAGE_SOUND_DIR "/" REMOTE_RING;
	tmpbuf=lp_config_get_string(lc->config,"sound","remote_ring",tmpbuf);
	if (ortp_file_exist(tmpbuf)==-1){
		tmpbuf=PACKAGE_SOUND_DIR "/" REMOTE_RING;
	}
	if (strstr(tmpbuf,".wav")==NULL){
		/* it currently uses old sound files, so replace them */
		tmpbuf=PACKAGE_SOUND_DIR "/" REMOTE_RING;
	}
	linphone_core_set_ringback(lc,tmpbuf);
	check_sound_device(lc);
	lc->sound_conf.latency=0;

	linphone_core_enable_echo_cancellation(lc,
	    lp_config_get_int(lc->config,"sound","echocancelation",0) |
	    lp_config_get_int(lc->config,"sound","echocancellation",0)
		);

	linphone_core_enable_echo_limiter(lc,
		lp_config_get_int(lc->config,"sound","echolimiter",0));
	linphone_core_enable_agc(lc,
		lp_config_get_int(lc->config,"sound","agc",0));
}

static void sip_config_read(LinphoneCore *lc)
{
	char *contact;
	const char *tmpstr;
	int port;
	int i,tmp;
	int ipv6;
	port=lp_config_get_int(lc->config,"sip","use_info",0);
	linphone_core_set_use_info_for_dtmf(lc,port);

	port=lp_config_get_int(lc->config,"sip","use_rfc2833",0);
	linphone_core_set_use_rfc2833_for_dtmf(lc,port);

	ipv6=lp_config_get_int(lc->config,"sip","use_ipv6",-1);
	if (ipv6==-1){
		ipv6=0;
		if (host_has_ipv6_network()){
			lc->vtable.display_message(lc,_("Your machine appears to be connected to an IPv6 network. By default linphone always uses IPv4. Please update your configuration if you want to use IPv6"));
		}
	}
	linphone_core_enable_ipv6(lc,ipv6);
	port=lp_config_get_int(lc->config,"sip","sip_port",5060);
	linphone_core_set_sip_port(lc,port);

	tmpstr=lp_config_get_string(lc->config,"sip","contact",NULL);
	if (tmpstr==NULL || linphone_core_set_primary_contact(lc,tmpstr)==-1) {
		const char *hostname=NULL;
		const char *username=NULL;
#ifdef HAVE_GETENV
		hostname=getenv("HOST");
		username=getenv("USER");
		if (hostname==NULL) hostname=getenv("HOSTNAME");
#endif /*HAVE_GETENV*/
		if (hostname==NULL)
			hostname="unknown-host";
		if (username==NULL){
			username="toto";
		}
		contact=ortp_strdup_printf("sip:%s@%s",username,hostname);
		linphone_core_set_primary_contact(lc,contact);
		ms_free(contact);
	}

	tmp=lp_config_get_int(lc->config,"sip","guess_hostname",1);
	linphone_core_set_guess_hostname(lc,tmp);


	tmp=lp_config_get_int(lc->config,"sip","inc_timeout",15);
	linphone_core_set_inc_timeout(lc,tmp);

	/* get proxies config */
	for(i=0;; i++){
		LinphoneProxyConfig *cfg=linphone_proxy_config_new_from_config_file(lc->config,i);
		if (cfg!=NULL){
			linphone_core_add_proxy_config(lc,cfg);
		}else{
			break;
		}
	}
	/* get the default proxy */
	tmp=lp_config_get_int(lc->config,"sip","default_proxy",-1);
	linphone_core_set_default_proxy_index(lc,tmp);

	/* read authentication information */
	for(i=0;; i++){
		LinphoneAuthInfo *ai=linphone_auth_info_new_from_config_file(lc->config,i);
		if (ai!=NULL){
			linphone_core_add_auth_info(lc,ai);
		}else{
			break;
		}
	}
	
	/*for test*/
	lc->sip_conf.sdp_200_ack=lp_config_get_int(lc->config,"sip","sdp_200_ack",0);
	lc->sip_conf.only_one_codec=lp_config_get_int(lc->config,"sip","only_one_codec",0);
	lc->sip_conf.register_only_when_network_is_up=
		lp_config_get_int(lc->config,"sip","register_only_when_network_is_up",0);
}

static void rtp_config_read(LinphoneCore *lc)
{
	int port;
	int jitt_comp;
	int nortp_timeout;
	port=lp_config_get_int(lc->config,"rtp","audio_rtp_port",7078);
	linphone_core_set_audio_port(lc,port);

	port=lp_config_get_int(lc->config,"rtp","video_rtp_port",9078);
	if (port==0) port=9078;
	linphone_core_set_video_port(lc,port);

	jitt_comp=lp_config_get_int(lc->config,"rtp","audio_jitt_comp",60);
	linphone_core_set_audio_jittcomp(lc,jitt_comp);
	jitt_comp=lp_config_get_int(lc->config,"rtp","video_jitt_comp",60);
	nortp_timeout=lp_config_get_int(lc->config,"rtp","nortp_timeout",30);
	linphone_core_set_nortp_timeout(lc,nortp_timeout);
}

static PayloadType * find_payload(RtpProfile *prof, const char *mime_type, int clock_rate, const char *recv_fmtp){
	PayloadType *candidate=NULL;
	int i;
	PayloadType *it;
	for(i=0;i<127;++i){
		it=rtp_profile_get_payload(prof,i);
		if (it!=NULL && strcasecmp(mime_type,it->mime_type)==0
			&& (clock_rate==it->clock_rate || clock_rate<=0) ){
			if ( (recv_fmtp && it->recv_fmtp && strcasecmp(recv_fmtp,it->recv_fmtp)==0) ||
				(recv_fmtp==NULL && it->recv_fmtp==NULL) ){
				/*exact match*/
				return it;
			}else candidate=it;
		}
	}
	return candidate;
}

static bool_t get_codec(LpConfig *config, char* type, int index, PayloadType **ret){
	char codeckey[50];
	const char *mime,*fmtp;
	int rate,enabled;
	PayloadType *pt;

	*ret=NULL;
	snprintf(codeckey,50,"%s_%i",type,index);
	mime=lp_config_get_string(config,codeckey,"mime",NULL);
	if (mime==NULL || strlen(mime)==0 ) return FALSE;

	rate=lp_config_get_int(config,codeckey,"rate",8000);
	fmtp=lp_config_get_string(config,codeckey,"recv_fmtp",NULL);
	enabled=lp_config_get_int(config,codeckey,"enabled",1);
	pt=find_payload(&av_profile,mime,rate,fmtp);
	if (pt && enabled ) pt->flags|=PAYLOAD_TYPE_ENABLED;
	//ms_message("Found codec %s/%i",pt->mime_type,pt->clock_rate);
	if (pt==NULL) ms_warning("Ignoring codec config %s/%i with fmtp=%s because unsupported",
	    		mime,rate,fmtp ? fmtp : "");
	*ret=pt;
	return TRUE;
}

static const char *codec_pref_order[]={
	"speex",
	"gsm",
	"pcmu",
	"pcma",
	"H264",
	"MP4V-ES",
	"theora",
	"H263-1998",
	"H263",
	NULL,
};

static int find_codec_rank(const char *mime){
	int i;
	for(i=0;codec_pref_order[i]!=NULL;++i){
		if (strcasecmp(codec_pref_order[i],mime)==0)
			break;
	}
	return i;
}

static int codec_compare(const PayloadType *a, const PayloadType *b){
	int ra,rb;
	ra=find_codec_rank(a->mime_type);
	rb=find_codec_rank(b->mime_type);
	if (ra==rb) return 0;
	if (ra>rb) return 1;
	if (ra<rb) return -1;
}

static MSList *add_missing_codecs(SalStreamType mtype, MSList *l){
	int i;
	for(i=0;i<127;++i){
		PayloadType *pt=rtp_profile_get_payload(&av_profile,i);
		if (pt){
			if (mtype==SalVideo && pt->type!=PAYLOAD_VIDEO)
				pt=NULL;
			else if (mtype==SalAudio && (pt->type!=PAYLOAD_AUDIO_PACKETIZED 
			    && pt->type!=PAYLOAD_AUDIO_CONTINUOUS)){
				pt=NULL;
			}
			if (pt && ms_filter_codec_supported(pt->mime_type)){
				if (ms_list_find(l,pt)==NULL){
					payload_type_set_flag(pt,PAYLOAD_TYPE_ENABLED);
					ms_message("Adding new codec %s/%i with fmtp %s",
					    pt->mime_type,pt->clock_rate,pt->recv_fmtp ? pt->recv_fmtp : "");
					l=ms_list_insert_sorted(l,pt,(int (*)(const void *, const void *))codec_compare);
				}
			}
		}
	}
	return l;
}

static void codecs_config_read(LinphoneCore *lc)
{
	int i;
	PayloadType *pt;
	MSList *audio_codecs=NULL;
	MSList *video_codecs=NULL;
	for (i=0;get_codec(lc->config,"audio_codec",i,&pt);i++){
		if (pt){
			if (!ms_filter_codec_supported(pt->mime_type)){
				ms_warning("Codec %s is not supported by mediastreamer2, removed.",pt->mime_type);
			}else audio_codecs=ms_list_append(audio_codecs,pt);
		}
	}
	audio_codecs=add_missing_codecs(SalAudio,audio_codecs);
	for (i=0;get_codec(lc->config,"video_codec",i,&pt);i++){
		if (pt){
			if (!ms_filter_codec_supported(pt->mime_type)){
				ms_warning("Codec %s is not supported by mediastreamer2, removed.",pt->mime_type);
			}else video_codecs=ms_list_append(video_codecs,(void *)pt);
		}
	}
	video_codecs=add_missing_codecs(SalVideo,video_codecs);
	linphone_core_set_audio_codecs(lc,audio_codecs);
	linphone_core_set_video_codecs(lc,video_codecs);
	linphone_core_update_allocated_audio_bandwidth(lc);
}

static void video_config_read(LinphoneCore *lc){
	int capture, display, self_view;
	int enabled;
	const char *str;
	int ndev;
	const char **devices;
	const MSList *elem;
	int i;

	/* retrieve all video devices */
	elem=ms_web_cam_manager_get_list(ms_web_cam_manager_get());
	ndev=ms_list_size(elem);
	devices=ms_malloc((ndev+1)*sizeof(const char *));
	for (i=0;elem!=NULL;elem=elem->next,i++){
		devices[i]=ms_web_cam_get_string_id((MSWebCam *)elem->data);
	}
	devices[ndev]=NULL;
	lc->video_conf.cams=devices;

	str=lp_config_get_string(lc->config,"video","device",NULL);
	if (str && str[0]==0) str=NULL;
	linphone_core_set_video_device(lc,str);

	linphone_core_set_preferred_video_size_by_name(lc,
		lp_config_get_string(lc->config,"video","size","cif"));

	enabled=lp_config_get_int(lc->config,"video","enabled",1);
	capture=lp_config_get_int(lc->config,"video","capture",enabled);
	display=lp_config_get_int(lc->config,"video","display",enabled);
	self_view=lp_config_get_int(lc->config,"video","self_view",enabled);
#ifdef VIDEO_ENABLED
	linphone_core_enable_video(lc,capture,display);
	linphone_core_enable_self_view(lc,self_view);
#endif
}

static void ui_config_read(LinphoneCore *lc)
{
	LinphoneFriend *lf;
	int i;
	for (i=0;(lf=linphone_friend_new_from_config_file(lc,i))!=NULL;i++){
		linphone_core_add_friend(lc,lf);
	}
	call_logs_read_from_config_file(lc);
}

/*
static void autoreplier_config_init(LinphoneCore *lc)
{
	autoreplier_config_t *config=&lc->autoreplier_conf;
	config->enabled=lp_config_get_int(lc->config,"autoreplier","enabled",0);
	config->after_seconds=lp_config_get_int(lc->config,"autoreplier","after_seconds",6);
	config->max_users=lp_config_get_int(lc->config,"autoreplier","max_users",1);
	config->max_rec_time=lp_config_get_int(lc->config,"autoreplier","max_rec_time",60);
	config->max_rec_msg=lp_config_get_int(lc->config,"autoreplier","max_rec_msg",10);
	config->message=lp_config_get_string(lc->config,"autoreplier","message",NULL);
}
*/

/**
 * Sets maximum available download bandwidth
 *
 * @ingroup media_parameters
 *
 * This is IP bandwidth, in kbit/s.
 * This information is used signaled to other parties during
 * calls (within SDP messages) so that the remote end can have
 * sufficient knowledge to properly configure its audio & video
 * codec output bitrate to not overflow available bandwidth.
 *
 * @param lc the LinphoneCore object
 * @param bw the bandwidth in kbits/s, 0 for infinite
 */
void linphone_core_set_download_bandwidth(LinphoneCore *lc, int bw){
	lc->net_conf.download_bw=bw;
	if (bw==0){ /*infinite*/
		lc->dw_audio_bw=-1;
		lc->dw_video_bw=-1;
	}else {
		lc->dw_audio_bw=MIN(lc->audio_bw,bw);
		lc->dw_video_bw=MAX(bw-lc->dw_audio_bw-10,0);/*-10: security margin*/
	}
}

/**
 * Sets maximum available upload bandwidth
 *
 * @ingroup media_parameters
 *
 * This is IP bandwidth, in kbit/s.
 * This information is used by liblinphone together with remote
 * side available bandwidth signaled in SDP messages to properly
 * configure audio & video codec's output bitrate.
 *
 * @param lc the LinphoneCore object
 * @param bw the bandwidth in kbits/s, 0 for infinite
 */
void linphone_core_set_upload_bandwidth(LinphoneCore *lc, int bw){
	lc->net_conf.upload_bw=bw;
	if (bw==0){ /*infinite*/
		lc->up_audio_bw=-1;
		lc->up_video_bw=-1;
	}else{
		lc->up_audio_bw=MIN(lc->audio_bw,bw);
		lc->up_video_bw=MAX(bw-lc->up_audio_bw-10,0);/*-10: security margin*/
	}
}

/**
 * Retrieve the maximum available download bandwidth.
 *
 * @ingroup media_parameters
 *
 * This value was set by linphone_core_set_download_bandwidth().
 *
**/
int linphone_core_get_download_bandwidth(const LinphoneCore *lc){
	return lc->net_conf.download_bw;
}

/**
 * Retrieve the maximum available upload bandwidth.
 *
 * @ingroup media_parameters
 *
 * This value was set by linphone_core_set_upload_bandwidth().
 *
**/
int linphone_core_get_upload_bandwidth(const LinphoneCore *lc){
	return lc->net_conf.upload_bw;
}

/**
 * Returns liblinphone's version as a string.
 *
 * @ingroup misc
 *
**/
const char * linphone_core_get_version(void){
	return liblinphone_version;
}


static MSList *linphone_payload_types=NULL;

static void linphone_core_assign_payload_type(PayloadType *const_pt, int number, const char *recv_fmtp){
	PayloadType *pt;
	pt=payload_type_clone(const_pt);
	payload_type_set_number(pt,number);
	if (recv_fmtp!=NULL) payload_type_set_recv_fmtp(pt,recv_fmtp);
	rtp_profile_set_payload(&av_profile,number,pt);
	linphone_payload_types=ms_list_append(linphone_payload_types,pt);
}

static void linphone_core_free_payload_types(void){
	ms_list_for_each(linphone_payload_types,(void (*)(void*))payload_type_destroy);
	ms_list_free(linphone_payload_types);
	linphone_payload_types=NULL;
}

static void linphone_core_init (LinphoneCore * lc, const LinphoneCoreVTable *vtable, const char *config_path, 
    const char *factory_config_path, void * userdata)
{
	memset (lc, 0, sizeof (LinphoneCore));
	lc->data=userdata;

	memcpy(&lc->vtable,vtable,sizeof(LinphoneCoreVTable));

	gstate_initialize(lc);
	gstate_new_state(lc, GSTATE_POWER_STARTUP, NULL);

	ortp_init();
	linphone_core_assign_payload_type(&payload_type_pcmu8000,0,NULL);
	linphone_core_assign_payload_type(&payload_type_gsm,3,NULL);
	linphone_core_assign_payload_type(&payload_type_pcma8000,8,NULL);
	linphone_core_assign_payload_type(&payload_type_lpc1015,115,NULL);
	linphone_core_assign_payload_type(&payload_type_speex_nb,110,"vbr=on");
	linphone_core_assign_payload_type(&payload_type_speex_wb,111,"vbr=on");
	linphone_core_assign_payload_type(&payload_type_speex_uwb,112,"vbr=on");
	linphone_core_assign_payload_type(&payload_type_telephone_event,101,NULL);
	linphone_core_assign_payload_type(&payload_type_ilbc,113,"mode=30");

#ifdef ENABLE_NONSTANDARD_GSM
	{
		PayloadType *pt;
		pt=payload_type_clone(&payload_type_gsm);
		pt->clock_rate=11025;
		rtp_profile_set_payload(&av_profile,114,pt);
		linphone_payload_types=ms_list_append(linphone_payload_types,pt);
		pt=payload_type_clone(&payload_type_gsm);
		pt->clock_rate=22050;
		rtp_profile_set_payload(&av_profile,115,pt);
		linphone_payload_types=ms_list_append(linphone_payload_types,pt);
	}
#endif

#ifdef VIDEO_ENABLED
	linphone_core_assign_payload_type(&payload_type_h263,34,NULL);
	linphone_core_assign_payload_type(&payload_type_theora,97,NULL);
	linphone_core_assign_payload_type(&payload_type_h263_1998,98,"CIF=1;QCIF=1");
	linphone_core_assign_payload_type(&payload_type_mp4v,99,"profile-level-id=3");
	linphone_core_assign_payload_type(&payload_type_x_snow,100,NULL);
	linphone_core_assign_payload_type(&payload_type_h264,102,NULL);
	linphone_core_assign_payload_type(&payload_type_h264,103,"packetization-mode=1");
#endif

	ms_init();

	lc->config=lp_config_new(config_path);
	if (factory_config_path)
		lp_config_read_file(lc->config,factory_config_path);

	lc->sal=sal_init();
	sal_set_user_pointer(lc->sal,lc);
	sal_set_callbacks(lc->sal,&linphone_sal_callbacks);
	if (lp_config_get_int(lc->config,"sip","use_session_timers",0)==1){
		sal_use_session_timers(lc->sal,200);
	}
	sip_setup_register_all();
	sound_config_read(lc);
	net_config_read(lc);
	rtp_config_read(lc);
	codecs_config_read(lc);
	sip_config_read(lc); /* this will start eXosip*/
	video_config_read(lc);
	//autoreplier_config_init(&lc->autoreplier_conf);
	lc->prev_mode=LINPHONE_STATUS_ONLINE;
	lc->presence_mode=LINPHONE_STATUS_ONLINE;
	lc->max_call_logs=15;
	ui_config_read(lc);
	lc->vtable.display_status(lc,_("Ready"));
        gstate_new_state(lc, GSTATE_POWER_ON, NULL);
	lc->ready=TRUE;
}

/**
 * Instanciates a LinphoneCore object.
 * @ingroup initializing
 * 
 * The LinphoneCore object is the primary handle for doing all phone actions.
 * It should be unique within your application.
 * @param vtable a LinphoneCoreVTable structure holding your application callbacks
 * @param config_path a path to a config file. If it does not exists it will be created.
 *        The config file is used to store all user settings, call logs, friends, proxies...
 * @param factory_config_path a path to a read-only config file that can be used to 
 *        to store hard-coded preference such as proxy settings or internal preferences.
 *        The settings in this factory file always override the one in the normal config file.
 *        It is OPTIONAL, use NULL if unneeded.
 * @param userdata an opaque user pointer that can be retrieved at any time (for example in
 *        callbacks) using linphone_core_get_user_data().
 * 
**/
LinphoneCore *linphone_core_new(const LinphoneCoreVTable *vtable,
						const char *config_path, const char *factory_config_path, void * userdata)
{
	LinphoneCore *core=ms_new(LinphoneCore,1);
	linphone_core_init(core,vtable,config_path, factory_config_path, userdata);
	return core;
}

/**
 * Returns the list of available audio codecs.
 *
 * This list is unmodifiable. The ->data field of the MSList points a PayloadType
 * structure holding the codec information.
 * It is possible to make copy of the list with ms_list_copy() in order to modify it
 * (such as the order of codecs).
**/
const MSList *linphone_core_get_audio_codecs(const LinphoneCore *lc)
{
	return lc->codecs_conf.audio_codecs;
}

/**
 * Returns the list of available video codecs.
 *
 * This list is unmodifiable. The ->data field of the MSList points a PayloadType
 * structure holding the codec information.
 * It is possible to make copy of the list with ms_list_copy() in order to modify it
 * (such as the order of codecs).
**/
const MSList *linphone_core_get_video_codecs(const LinphoneCore *lc)
{
	return lc->codecs_conf.video_codecs;
}

/**
 * Sets the local "from" identity.
 *
 * @ingroup proxies
 * This data is used in absence of any proxy configuration or when no
 * default proxy configuration is set. See LinphoneProxyConfig
**/
int linphone_core_set_primary_contact(LinphoneCore *lc, const char *contact)
{
	LinphoneAddress *ctt;

	if ((ctt=linphone_address_new(contact))==0) {
		ms_error("Bad contact url: %s",contact);
		return -1;
	}
	if (lc->sip_conf.contact!=NULL) ms_free(lc->sip_conf.contact);
	lc->sip_conf.contact=ms_strdup(contact);
	if (lc->sip_conf.guessed_contact!=NULL){
		ms_free(lc->sip_conf.guessed_contact);
		lc->sip_conf.guessed_contact=NULL;
	}
	linphone_address_destroy(ctt);
	return 0;
}


/*result must be an array of chars at least LINPHONE_IPADDR_SIZE */
void linphone_core_get_local_ip(LinphoneCore *lc, const char *dest, char *result){
	if (lc->apply_nat_settings){
		apply_nat_settings(lc);
		lc->apply_nat_settings=FALSE;
	}
	if (linphone_core_get_firewall_policy(lc)==LINPHONE_POLICY_USE_NAT_ADDRESS){
		strncpy(result,linphone_core_get_nat_address(lc),LINPHONE_IPADDR_SIZE);
		return;
	}
	if (dest==NULL) dest="87.98.157.38"; /*a public IP address*/
	if (linphone_core_get_local_ip_for(dest,result)==0)
		return;
	/*else fallback to SAL routine that will attempt to find the most realistic interface */
	sal_get_default_local_ip(lc->sal,lc->sip_conf.ipv6_enabled ? AF_INET6 : AF_INET,result,LINPHONE_IPADDR_SIZE);
}

/**
 * Returns the default identity when no proxy configuration is used.
 *
 * @ingroup proxies
**/
const char *linphone_core_get_primary_contact(LinphoneCore *lc){
	char *identity;
	char tmp[LINPHONE_IPADDR_SIZE];
	
	if (lc->sip_conf.guess_hostname){
		if (lc->sip_conf.guessed_contact==NULL || lc->sip_conf.loopback_only){
			char *guessed=NULL;
			LinphoneAddress *url;
			if (lc->sip_conf.guessed_contact!=NULL){
				ms_free(lc->sip_conf.guessed_contact);
				lc->sip_conf.guessed_contact=NULL;
			}
			url=linphone_address_new(lc->sip_conf.contact);
			if (!url){
				ms_error("Could not parse identity contact !");
				url=linphone_address_new("sip:unknown@unkwownhost");
			}
			linphone_core_get_local_ip(lc, NULL, tmp);
			if (strcmp(tmp,"127.0.0.1")==0 || strcmp(tmp,"::1")==0 ){
				ms_warning("Local loopback network only !");
				lc->sip_conf.loopback_only=TRUE;
			}else lc->sip_conf.loopback_only=FALSE;
			linphone_address_set_domain(url,tmp);
			linphone_address_set_port_int(url,lc->sip_conf.sip_port);
			guessed=linphone_address_as_string(url);
			lc->sip_conf.guessed_contact=guessed;
			linphone_address_destroy(url);
		}
		identity=lc->sip_conf.guessed_contact;
	}else{
		identity=lc->sip_conf.contact;
	}
	return identity;
}

/**
 * Tells LinphoneCore to guess local hostname automatically in primary contact.
 *
 * @ingroup proxies
**/
void linphone_core_set_guess_hostname(LinphoneCore *lc, bool_t val){
	lc->sip_conf.guess_hostname=val;
}

/**
 * Returns TRUE if hostname part of primary contact is guessed automatically.
 *
 * @ingroup proxies
**/
bool_t linphone_core_get_guess_hostname(LinphoneCore *lc){
	return lc->sip_conf.guess_hostname;
}

/**
 * Same as linphone_core_get_primary_contact() but the result is a LinphoneAddress object
 * instead of const char*
 *
 * @ingroup proxies
**/
LinphoneAddress *linphone_core_get_primary_contact_parsed(LinphoneCore *lc){
	return linphone_address_new(linphone_core_get_primary_contact(lc));
}

/**
 * Sets the list of audio codecs.
 *
 * @ingroup media_parameters
 * The list is taken by the LinphoneCore thus the application should not free it.
 * This list is made of struct PayloadType describing the codec parameters.
**/
int linphone_core_set_audio_codecs(LinphoneCore *lc, MSList *codecs)
{
	if (lc->codecs_conf.audio_codecs!=NULL) ms_list_free(lc->codecs_conf.audio_codecs);
	lc->codecs_conf.audio_codecs=codecs;
	return 0;
}

/**
 * Sets the list of video codecs.
 *
 * @ingroup media_parameters
 * The list is taken by the LinphoneCore thus the application should not free it.
 * This list is made of struct PayloadType describing the codec parameters.
**/
int linphone_core_set_video_codecs(LinphoneCore *lc, MSList *codecs)
{
	if (lc->codecs_conf.video_codecs!=NULL) ms_list_free(lc->codecs_conf.video_codecs);
	lc->codecs_conf.video_codecs=codecs;
	return 0;
}

const MSList * linphone_core_get_friend_list(const LinphoneCore *lc)
{
	return lc->friends;
}

/**
 * Returns the nominal jitter buffer size in milliseconds.
 *
 * @ingroup media_parameters
**/
int linphone_core_get_audio_jittcomp(LinphoneCore *lc)
{
	return lc->rtp_conf.audio_jitt_comp;
}

/**
 * Returns the UDP port used for audio streaming.
 *
 * @ingroup network_parameters
**/
int linphone_core_get_audio_port(const LinphoneCore *lc)
{
	return lc->rtp_conf.audio_rtp_port;
}

/**
 * Returns the UDP port used for video streaming.
 *
 * @ingroup network_parameters
**/
int linphone_core_get_video_port(const LinphoneCore *lc){
	return lc->rtp_conf.video_rtp_port;
}


/**
 * Returns the value in seconds of the no-rtp timeout.
 *
 * @ingroup media_parameters
 * When no RTP or RTCP packets have been received for a while
 * LinphoneCore will consider the call is broken (remote end crashed or
 * disconnected from the network), and thus will terminate the call.
 * The no-rtp timeout is the duration above which the call is considered broken.
**/
int linphone_core_get_nortp_timeout(const LinphoneCore *lc){
	return lc->rtp_conf.nortp_timeout;
}

/**
 * Sets the nominal audio jitter buffer size in milliseconds.
 *
 * @ingroup media_parameters
**/
void linphone_core_set_audio_jittcomp(LinphoneCore *lc, int value)
{
	lc->rtp_conf.audio_jitt_comp=value;
}

/**
 * Sets the UDP port used for audio streaming.
 *
 * @ingroup network_parameters
**/
void linphone_core_set_audio_port(LinphoneCore *lc, int port)
{
	lc->rtp_conf.audio_rtp_port=port;
}

/**
 * Sets the UDP port used for video streaming.
 *
 * @ingroup network_parameters
**/
void linphone_core_set_video_port(LinphoneCore *lc, int port){
	lc->rtp_conf.video_rtp_port=port;
}

/**
 * Sets the no-rtp timeout value in seconds.
 * 
 * @ingroup media_parameters
 * See linphone_core_get_nortp_timeout() for details.
**/
void linphone_core_set_nortp_timeout(LinphoneCore *lc, int nortp_timeout){
	lc->rtp_conf.nortp_timeout=nortp_timeout;
}

/**
 * Indicates whether SIP INFO is used for sending digits.
 *
 * @ingroup media_parameters
**/
bool_t linphone_core_get_use_info_for_dtmf(LinphoneCore *lc)
{
	return lc->sip_conf.use_info;
}

/**
 * Sets whether SIP INFO is to be used for sending digits.
 *
 * @ingroup media_parameters
**/
void linphone_core_set_use_info_for_dtmf(LinphoneCore *lc,bool_t use_info)
{
	lc->sip_conf.use_info=use_info;
}

/**
 * Indicates whether RFC2833 is used for sending digits.
 *
 * @ingroup media_parameters
**/
bool_t linphone_core_get_use_rfc2833_for_dtmf(LinphoneCore *lc)
{
	return lc->sip_conf.use_rfc2833;
}

/**
 * Sets whether RFC2833 is to be used for sending digits.
 *
 * @ingroup media_parameters
**/
void linphone_core_set_use_rfc2833_for_dtmf(LinphoneCore *lc,bool_t use_rfc2833)
{
	lc->sip_conf.use_rfc2833=use_rfc2833;
}

/**
 * Returns the UDP port used by SIP.
 *
 * @ingroup network_parameters
**/
int linphone_core_get_sip_port(LinphoneCore *lc)
{
	return lc->sip_conf.sip_port;
}

static bool_t exosip_running=FALSE;
static char _ua_name[64]="Linphone";
static char _ua_version[64]=LINPHONE_VERSION;

#ifdef HAVE_EXOSIP_GET_VERSION
extern const char *eXosip_get_version();
#endif

static void apply_user_agent(LinphoneCore *lc){
	char ua_string[256];
	snprintf(ua_string,sizeof(ua_string),"%s/%s (eXosip2/%s)",_ua_name,_ua_version,
#ifdef HAVE_EXOSIP_GET_VERSION
		 eXosip_get_version()
#else
		 "unknown"
#endif
	);
	if (lc->sal) sal_set_user_agent(lc->sal,ua_string);
}

/**
 * Sets the user agent string used in SIP messages.
 *
 * @ingroup misc
**/
void linphone_core_set_user_agent(const char *name, const char *ver){
	strncpy(_ua_name,name,sizeof(_ua_name)-1);
	strncpy(_ua_version,ver,sizeof(_ua_version));
}

/**
 * Sets the UDP port to be used by SIP.
 *
 * @ingroup network_parameters
**/
void linphone_core_set_sip_port(LinphoneCore *lc,int port)
{
	const char *anyaddr;
	int err=0;
	if (port==lc->sip_conf.sip_port) return;
	lc->sip_conf.sip_port=port;

	if (lc->sal==NULL) return;
	
	if (lc->sip_conf.ipv6_enabled)
		anyaddr="::0";
	else
		anyaddr="0.0.0.0";
	err=sal_listen_port (lc->sal,anyaddr,port, SalTransportDatagram,FALSE);
	if (err<0