Hello, it means that the same SUBSCRIBE was aready processed and the current one is a retransmission. Can you look at sip network traffic (using ngrep, sngrep, ...) and see if there are two SUBSCRIBE requests received?
Cheers, Daniel On 05.10.17 11:34, Jack Wang wrote: > Hello everyone, > > According to the routing flow set in kamailio.cfg > > # handle retransmissions > if(t_precheck_trans()) { > t_check_trans(); > exit; > } > t_check_trans(); > After I traced the flow it seems that SUBSCRIBE message failed on > t_check_trans() and stopped there. > I add some logs to keep tracing this function and found that: > int t_check_trans(struct sip_msg* msg) { struct cell* t; int branch; > int ret; /* already processing a T */ if(is_route_type(FAILURE_ROUTE) > || is_route_type(BRANCH_ROUTE) || is_route_type(BRANCH_FAILURE_ROUTE) > || is_route_type(TM_ONREPLY_ROUTE)) { return 1; } if > (msg->first_line.type==SIP_REPLY) { branch = 0; ret = (t_check_msg( > msg , &branch)==1) ? 1 : -1; tm_ctx_set_branch_index(branch); return > ret; } else if (msg->REQ_METHOD==METHOD_CANCEL) { return > w_t_lookup_cancel(msg, 0, 0); } else { switch(t_check_msg(msg, 0)){ > case -2: /* possible e2e ack */ return 1; case 1: /* found */ > t=get_t(); if (msg->REQ_METHOD==METHOD_ACK){ /* ack to neg. reply or > ack to local trans. => process it and end the script */ /* FIXME: > there's no way to distinguish here between acks to local trans. and > neg. acks */ if (unlikely(has_tran_tmcbs(t, TMCB_ACK_NEG_IN))) > run_trans_callbacks(TMCB_ACK_NEG_IN, t, msg, 0, msg->REQ_METHOD); > t_release_transaction(t); } else { /* is a retransmission */ if > (unlikely(has_tran_tmcbs(t, TMCB_REQ_RETR_IN))) > run_trans_callbacks(TMCB_REQ_RETR_IN, t, msg, 0, msg->REQ_METHOD); > t_retransmit_reply(t); } /* no need for UNREF(t); set_t(0) - the > end-of-script t_unref callback will take care of them */ return 0; /* > exit from the script */ <---------------------------- THE POINT !!} /* > not found or error */ } return -1; } > > If the line "return 0; /* exit from the script */" was changed to > "return 1; /* exit from the script */" , it works ---- means that the > configuration script can keep being proceeded now. > Any suggestions? > > > _______________________________________________ > Kamailio (SER) - Users Mailing List > sr-users@lists.kamailio.org > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - www.asipto.com Kamailio World Conference - www.kamailioworld.com
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