[Serusers] Re: call busy forward failed

[Charles Wang]

On Tue, 22 Feb 2005 13:26:56 +0800, Charles Wang <lazy.charles at gmail.com> wrote:
> Dear ALL:
> 
> I try to make a call from UA1 to UA2, and UA2 is busy. So the call
> will forward to another UA3.
> UA1 ==> UA2(busy) ==> UA3
> 
> But when I watch the log, I find that miss the following log (diff
> with call from UA1 to UA2 and directly forward to UA3)
> UA1 ==> UA2(callfwd) ==> UA3
> 
> Feb 22 12:15:07 ser mediaproxy[18476]: session
> 16AA8C75-5EAC-403C-85DA-C5D9BDFD15C7 at 10.18.1.70: started. listening on
> xxx.xxx.190.248:35026
> 
> When I make a callfwd call, the call will run route[2] but not failure_route[1].
> UA1==>UA2(callfwd)==>route[2]==>UA3
> 
> And I make a fwdbusy call, the call will run route[2] then pass
> failure_route[1],
> and return to route[2].
> UA1==>UA2(fwdbusy)==>failure_route[1]==>route[2] =XXX=> UA3 ????
> 
> Why does the method be failed? Do I must "end_media_session()" before
> start a busy call?
> How can I modify it?
> 
> My snippet ser.cfg :
> --------------------------------------------------------------------------------------------------------------
> route[2] {
>        log(1, "SER: SIP Call On-Net section route(2)\n");
>        if ((method=="INVITE") && !allow_trusted()) {
>                if (!proxy_authorize("", "subscriber")) {
>                        proxy_challenge("", "0");
>                        break;
>                } else if (!check_from()) {
>                        log(1, "Spoofed SIP call attempt");
>                        sl_send_reply("403", "Use From=ID");
>                        break;
>                } else if (!(is_from_local() || is_uri_host_local())) {
>                        sl_send_reply("403", "Please register to use our service");
>                        break;
>                };
>        };
>        if (uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)" &&
> !search("^Route:")){
>                sl_send_reply("479", "We don't forward to private IP addresses");
>                break;
>        };
>        if (method=="INVITE" || method=="ACK") {
>                use_media_proxy();
>        };
>        t_on_failure("1");
>        t_on_reply("1");
>        if (!t_relay()) {
>                if (method=="INVITE" || method=="ACK") {
>                        end_media_session();
>                };
>                sl_reply_error();
>        };
> }
> 
> failure_route[1] {
>        log(1, "SER: Failure Route section failure_route(1)\n");
> 
>        # if caller hung up then don't sent to voicemail
>        if (t_check_status("487")) {
>                break;
>        };
>        if (isflagset(26) && t_check_status("486")) {
>                # forward busy is flag 26
> 
>                if (avp_pushto("$ruri", "s:fwdbusy")) {
>                        log(1, "SER: fork to fwdbusy\n");
>                        avp_delete("s:fwdbusy");
>                        append_branch();
>                        resetflag(26);
> 
>                        # test for domestic PSTN gateway
>                        if (uri=~"^sip:0[0-9]{9}@") {
>                        # if (avp_check("$fwd_busy_type", "eq/dom/i")) {
>                                # test for domestic PSTN gateway
>                                log(1, "SER: Busy Failure and Jump to route(3)\n");
>                                route(3);
>                        } else if (uri=~"^sip:002[1-9][0-9]*@") {
>                        # } else if (avp_check("$fwd_busy_type", "eq/int/i")) {
>                                # test for international PSTN gateway
>                                log(1, "SER: Busy Failure and Jump to route(6)\n");
>                                route(6);
>                        } else {
>                                # default to sip call
>                                log(1, "SER: Busy Failure and Jump to route(2)\n");
>                                route(2);
>                        };
>                        break;
>                };
>        };
> 
>        # here we can have either voicemail __OR__ forward no answer
>        if (isflagset(27) && t_check_status("408")) {
>                # forward no answer is flag 27
> 
>                if (avp_db_load("$ruri/username", "s:fwdnoanswer")) {
>                        avp_pushto("$ruri", "s:fwdnoanswer");
>                        log(1, "SER: fork to fwdnoanswer\n");
>                        avp_delete("s:fwdnoanswer");
>                        append_branch();
>                        resetflag(27);
> 
>                        if (uri=~"^sip:0[0-9]{9}@") {
>                        # if (avp_check("$fwd_no_answer_type", "eq/dom/i")) {
>                                # test for domestic PSTN gateway
>                                log(1, "SER: No Answer Failure and Jump to route(3)\n");
>                                route(3);
>                  } else if (uri=~"^sip:002[1-9][0-9]*@") {
>                        # } else if (avp_check("$fwd_no_answer_type", "eq/int/i")) {
>                                # test for international PSTN gateway
>                                log(1, "SER: No Answer Failure and Jump to route(6)\n");
>                                route(6);
>                        } else {
>                                # default to sip call
>                                log(1, "SER: No Answer Failure and Jump to route(2)\n");
>                                route(2);
>                        };
>                        break;
>                };
>        } else if (isflagset(31) && avp_pushto("$ruri", "$voicemail")) {
>                avp_delete("$voicemail");
>                log(1, "SER: No Answer Failure and Jump to route(4)\n");
>                route(4);
>                break;
>        };
> }
>