Function t_check_trans

modules/tm/tm.c:1125–1165

static int t_check_trans(struct sip_msg* msg)
{
	struct cell *trans;

	if (msg->REQ_METHOD==METHOD_CANCEL) {
		/* parse needed hdrs*/
		if (check_transaction_quadruple(msg)==0) {
			LM_ERR("too few headers\n");
			return 0; /*drop request!*/
		}
		if (!msg->hash_index)
			msg->hash_index = tm_hash(msg->callid->body,get_cseq(msg)->number);
		/* performe lookup */
		trans = t_lookupOriginalT(  msg );
		return trans?1:-1;
	} else {
		trans = get_t();
		if (trans==NULL)
			return -1;
		if (trans!=T_UNDEFINED)
			return 1;
		switch ( t_lookup_request( msg , 0) ) {
			case 1:
				/* transaction found -> is it local ACK? */
				if (msg->REQ_METHOD==METHOD_ACK)
					return 1;
				/* .... else -> retransmission */
				trans = get_t();
				t_retransmit_reply(trans);
				UNREF(trans);
				set_t(0);
				return 0;
			case -2:
				/* e2e ACK found */
				return -2;
			default:
				/* notfound */
				return -1;
		}
	}
}


static int t_flush_flags(struct sip_msg* msg)