Exemple #1
0
/**
 * Updates a dialog.
 * If the initial request was:
 * - INVITE - refreshes the expiration or looks for the BYE and destroys the dialog 
 * if found
 * - SUBSCRIBE - looks for the Subscription-state in NOTIFY, refreshes the expiration 
 * and if terminated destroys the dialog
 * - When adding more dialogs, add the refreshal methods here or they will expire and will
 * be destroyed. Also add the termination to reduce the memory consumption and improve the
 * performance.
 * @param msg - the request/response
 * @param str1 - direction - "orig" or "term"
 * @param str2 - not used
 * @returns #CSCF_RETURN_TRUE if ok, #CSCF_RETURN_FALSE if not or #CSCF_RETURN_BREAK on error 
 */
int S_update_dialog(struct sip_msg* msg, char* str1, char* str2)
{
	str call_id;
	s_dialog *d;
	int response;
	int cseq;

	struct hdr_field *h=0;
	struct sip_msg *req=0;
	int expires=0;
	str totag;
	time_t t_time;
	str ses_exp = {0,0};
	str refresher = {0,0};

	enum s_dialog_direction dir = get_dialog_direction(str1);
		
//	if (!find_dialog_aor(msg,str1,&aor)){
//		req = cscf_get_request_from_reply(msg);		
//		if (!find_dialog_aor(req,str1,&aor)){
//			LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
//			return CSCF_RETURN_BREAK;
//		}
//	}		
		
	call_id = cscf_get_call_id(msg,0);
	if (!call_id.len)
		return CSCF_RETURN_FALSE;

	LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): Call-ID <%.*s>\n",str1,call_id.len,call_id.s);

	d = get_s_dialog_dir(call_id,dir);
//	if (!d && msg->first_line.type==SIP_REPLY){
//		/* Try to get the dialog from the request */
//		if (!req) req = cscf_get_request_from_reply(msg);		
//		if (!find_dialog_aor(req,str1,&aor)){
//			LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
//			return CSCF_RETURN_BREAK;
//		}		
//		d = get_s_dialog_dir(call_id,aor);		
//	}
	if (!d){
		LOG(L_INFO,"INFO:"M_NAME":S_update_dialog: dialog does not exists!\n");	
		return CSCF_RETURN_FALSE;
	}


	if (msg->first_line.type==SIP_REQUEST){
		/* Request */
		LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): Method <%.*s> \n",str1,
			msg->first_line.u.request.method.len,msg->first_line.u.request.method.s);
		cseq = cscf_get_cseq(msg,&h);
		if (cseq>d->last_cseq) d->last_cseq = cseq;
		if (get_dialog_method(msg->first_line.u.request.method) == DLG_METHOD_INVITE)
		{
			d->uac_supp_timer = supports_extension(msg, &str_ext_timer);
	
			ses_exp = cscf_get_session_expires_body(msg, &h);
			t_time = cscf_get_session_expires(ses_exp, &refresher);
			if (!t_time)
			{
				d->expires = d_act_time()+scscf_dialogs_expiration_time;
				d->lr_session_expires = 0;
			}
			else
			{
				d->expires = d_act_time() + t_time;
				d->lr_session_expires = t_time;
				if (refresher.len)
					STR_SHM_DUP(d->refresher, refresher, "DIALOG_REFRESHER");
			}
		}
		else if (d->method == DLG_METHOD_SUBSCRIBE &&
			msg->first_line.u.request.method.len == 6 &&
			strncasecmp(msg->first_line.u.request.method.s,"NOTIFY",6)==0)
		{
			// Subscription-State header is mandatory for NOTIFY. See RFC 3265, Section 7.2
			expires = cscf_get_subscription_state(msg);
			if (expires >= 0)
				d->expires = d_act_time()+expires;
			else
				d->expires = d_act_time()+scscf_dialogs_expiration_time;
		}
		else
		{
			expires = cscf_get_expires_hdr(msg,0);
			if (expires >= 0)
			        d->expires = d_act_time()+expires;
			else
					d->expires = d_act_time()+scscf_dialogs_expiration_time;
	
			d->lr_session_expires = 0;		
		}
	}else{
		/* Reply */
		response = msg->first_line.u.reply.statuscode;
		LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): <%d> \n",str1,response);
		cseq = cscf_get_cseq(msg,&h);
		if (cseq==0 || h==0) return CSCF_RETURN_FALSE;
		if (d->first_cseq==cseq && d->method_str.len == ((struct cseq_body *)h->parsed)->method.len &&
			strncasecmp(d->method_str.s,((struct cseq_body *)h->parsed)->method.s,d->method_str.len)==0 &&
			d->state < DLG_STATE_CONFIRMED){
			/* reply to initial request */
			if (response<200){
				d->state = DLG_STATE_EARLY;
				d->expires = d_act_time()+300;
			}else
			if (response>=200 && response<300){
				d->state = DLG_STATE_CONFIRMED;
				update_dialog_on_reply(msg, d);
				
				/*I save the dialogs only here because
				 * i only want to release confirmed dialogs*/
				cscf_get_to_tag(msg,&totag);
				if (d->dialog_s){
					tmb.update_dlg_uas(d->dialog_s,response,&totag);
					tmb.dlg_response_uac(d->dialog_c,msg,IS_NOT_TARGET_REFRESH);
				}else{
					LOG(L_ERR,"ERR:S_update_dialog(): dialog_s for dialog was NULL!\n");
				}
			}else
				if (response>300){
					d->state = DLG_STATE_TERMINATED;
					d_unlock(d->hash);				
					struct cell * t = tmb.t_gett();
					if(t->nr_of_outgoings < 2)
						return S_drop_dialog(msg,str1,str2);
				}				
		}else{
			/* reply to subsequent request */			
			if (!req) req = cscf_get_request_from_reply(msg);
			
			/* destroy dialogs on specific methods */
			switch (d->method){
				case DLG_METHOD_OTHER:							
					d->expires = d_act_time()+scscf_dialogs_expiration_time;
					d->lr_session_expires = 0;
					break;
				
				case DLG_METHOD_INVITE:
					if (req && req->first_line.u.request.method.len==3 &&
						strncasecmp(req->first_line.u.request.method.s,"BYE",3)==0){
						d->state = DLG_STATE_TERMINATED;
						d_unlock(d->hash);				
						return S_drop_dialog(msg,str1,str2);
					}
					update_dialog_on_reply(msg, d);
					break;
				case DLG_METHOD_SUBSCRIBE:
//					if (req && req->first_line.u.request.method.len==9 &&
//						strncasecmp(req->first_line.u.request.method.s,"SUBSCRIBE",9)==0 &&
//						cscf_get_expires_hdr(msg)==0){						
//						d->state = DLG_STATE_TERMINATED;
//						d_unlock(d->hash);				
//						return P_dros_dialog(msg,str1,str2);
//					}
					if (req && req->first_line.u.request.method.len==6 &&
						strncasecmp(req->first_line.u.request.method.s,"NOTIFY",6)==0){
						expires = cscf_get_subscription_state(req);
						if (expires==0){						
							d->state = DLG_STATE_TERMINATED;
							d_unlock(d->hash);				
							return S_drop_dialog(msg,str1,str2);
						}else if (expires>0){
							d->expires = d_act_time() + expires;
						}
					}
					else if (req && req->first_line.u.request.method.len==9 &&
						strncasecmp(req->first_line.u.request.method.s,"SUBSCRIBE",9)==0){
						expires = cscf_get_expires_hdr(msg,0);
						if (expires >= 0)
							d->expires = d_act_time()+expires;
						else
							d->expires = d_act_time()+scscf_dialogs_expiration_time;
					}					
					break;
			}
			if (cseq>d->last_cseq) d->last_cseq = cseq;						
		}
	}
	
	d_unlock(d->hash);
	
	print_s_dialogs(L_INFO);
	
	return CSCF_RETURN_TRUE;	
out_of_memory:
	if (d) d_unlock(d->hash);
	return CSCF_RETURN_ERROR;	
}
Exemple #2
0
/**
 * Updates a dialog.
 * If the initial request was:
 * - INVITE - refreshes the expiration or looks for the BYE and destroys the dialog 
 * if found
 * - SUBSCRIBE - looks for the Subscription-state in NOTIFY, refreshes the expiration 
 * and if terminated destroys the dialog
 * - When adding more dialogs, add the refreshal methods here or they will expire and will
 * be destroyed. Also add the termination to reduce the memory consumption and improve the
 * performance.
 * @param msg - the request/response
 * @param str1 - direction - "orig" or "term"
 * @param str2 - not used
 * @returns #CSCF_RETURN_TRUE if ok, #CSCF_RETURN_FALSE if not or #CSCF_RETURN_BREAK on error 
 */
int S_update_dialog(struct sip_msg* msg, char* str1, char* str2)
{
	str call_id;
	s_dialog *d;
	int response;
	int cseq;
	struct hdr_field *h=0;
	struct sip_msg *req=0;
	int expires=0;
	str totag;

	enum s_dialog_direction dir = get_dialog_direction(str1);
		
//	if (!find_dialog_aor(msg,str1,&aor)){
//		req = cscf_get_request_from_reply(msg);		
//		if (!find_dialog_aor(req,str1,&aor)){
//			LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
//			return CSCF_RETURN_BREAK;
//		}
//	}		
		
	call_id = cscf_get_call_id(msg,0);
	if (!call_id.len)
		return CSCF_RETURN_FALSE;

	LOG(L_INFO,"DBG:"M_NAME":S_update_dialog(%s): Call-ID <%.*s>\n",str1,call_id.len,call_id.s);

	d = get_s_dialog_dir(call_id,dir);
//	if (!d && msg->first_line.type==SIP_REPLY){
//		/* Try to get the dialog from the request */
//		if (!req) req = cscf_get_request_from_reply(msg);		
//		if (!find_dialog_aor(req,str1,&aor)){
//			LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
//			return CSCF_RETURN_BREAK;
//		}		
//		d = get_s_dialog_dir(call_id,aor);		
//	}
	if (!d){
		LOG(L_INFO,"INFO:"M_NAME":S_update_dialog: dialog does not exists!\n");	
		return CSCF_RETURN_FALSE;
	}


	if (msg->first_line.type==SIP_REQUEST){
		/* Request */
		LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): Method <%.*s> \n",str1,
			msg->first_line.u.request.method.len,msg->first_line.u.request.method.s);
		cseq = cscf_get_cseq(msg,&h);
		if (cseq>d->last_cseq) d->last_cseq = cseq;
		d->expires = d_act_time()+scscf_dialogs_expiration_time;
	}else{
		/* Reply */
		response = msg->first_line.u.reply.statuscode;
		LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): <%d> \n",str1,response);
		cseq = cscf_get_cseq(msg,&h);
		if (cseq==0 || h==0) return CSCF_RETURN_FALSE;
		if (d->first_cseq==cseq && d->method_str.len == ((struct cseq_body *)h->parsed)->method.len &&
			strncasecmp(d->method_str.s,((struct cseq_body *)h->parsed)->method.s,d->method_str.len)==0 &&
			d->state < DLG_STATE_CONFIRMED){
			/* reply to initial request */
			if (response<200){
				d->state = DLG_STATE_EARLY;
				d->expires = d_act_time()+300;
			}else
			if (response>=200 && response<300){
				d->state = DLG_STATE_CONFIRMED;
				d->expires = d_act_time()+scscf_dialogs_expiration_time;
				/*I save the dialogs only here because
				 * i only want to release confirmed dialogs*/
				cscf_get_to_tag(msg,&totag);
				tmb.update_dlg_uas(d->dialog_s,response,&totag);
				tmb.dlg_response_uac(d->dialog_c,msg,IS_NOT_TARGET_REFRESH);				
			}else
				if (response>300){
					d->state = DLG_STATE_TERMINATED;
					d_unlock(d->hash);				
					return S_drop_dialog(msg,str1,str2);
				}				
		}else{
			/* reply to subsequent request */			
			if (!req) req = cscf_get_request_from_reply(msg);
			
			/* destroy dialogs on specific methods */
			switch (d->method){
				case DLG_METHOD_OTHER:							
					d->expires = d_act_time()+scscf_dialogs_expiration_time;
					break;
				case DLG_METHOD_INVITE:
					if (req && req->first_line.u.request.method.len==3 &&
						strncasecmp(req->first_line.u.request.method.s,"BYE",3)==0){
						d->state = DLG_STATE_TERMINATED;
						d_unlock(d->hash);				
						return S_drop_dialog(msg,str1,str2);
					}
					d->expires = d_act_time()+scscf_dialogs_expiration_time;
					break;
				case DLG_METHOD_SUBSCRIBE:
//					if (req && req->first_line.u.request.method.len==9 &&
//						strncasecmp(req->first_line.u.request.method.s,"SUBSCRIBE",9)==0 &&
//						cscf_get_expires_hdr(msg)==0){						
//						d->state = DLG_STATE_TERMINATED;
//						d_unlock(d->hash);				
//						return P_dros_dialog(msg,str1,str2);
//					}
					if (req && req->first_line.u.request.method.len==6 &&
						strncasecmp(req->first_line.u.request.method.s,"NOTIFY",6)==0){
						expires = cscf_get_subscription_state(req);
						if (expires==0){						
							d->state = DLG_STATE_TERMINATED;
							d_unlock(d->hash);				
							return S_drop_dialog(msg,str1,str2);
						}else if (expires>0){
							d->expires = expires;
						}
					}
					break;
			}
			if (cseq>d->last_cseq) d->last_cseq = cseq;						
		}
	}
	
	d_unlock(d->hash);
	
//	print_s_dialogs(L_INFO);
	
	return CSCF_RETURN_TRUE;	
}