[OpenSIPS-Users] sl question.

johan johan at democon.be
Mon Sep 12 14:55:00 UTC 2022 

Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_msg: SIP Request:
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_msg:  method:  <ACK>
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_msg:  uri:    
<sip:+32478720104 at x.y.z.t:*11000*;transport=udp;alias=x.y.z.t~11000~1>
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_msg:  version: <SIP/2.0>
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_headers: flags=ffffffffffffffff
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_via_param: found param type 232, <branch> =
<z9hG4bK-2487-1-5>; state=16
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_via: end of header reached, state=5
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_headers: via found, flags=ffffffffffffffff
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_headers: this is the first via
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_to_param: tag=4SpHB6a416Ucg
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_to_param: end of header reached, state=13
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:_parse_to: end of header reached, state=29
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:_parse_to: display={sut},
ruri={sip:+32478720104 at 192.168.68.120:5060}
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:get_hdr_field: <To> [62];
uri=[sip:+32478720104 at 192.168.68.120:5060]
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:get_hdr_field: to body [sut <sip:+32478720104 at 192.168.68.120:5060>]
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:get_hdr_field: cseq <CSeq>: <1> <ACK>
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:get_hdr_field: content_length=0
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:get_hdr_field: found end of header
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:receive_msg: After parse_msg...
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:receive_msg: preparing to run routing scripts...
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:sl:sl_filter_ACK: too late to be a local ACK!
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:comp_scriptvar: int 20: 5062 / 5060
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:comp_scriptvar: int 20: 5062 / 5062
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]: from sipp
sp==5062==5062, we rewrite to iad listening port 5060 and we forward to
185.58.97.161
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_to_param: tag=1
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_to_param: end of header reached, state=11
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:_parse_to: end of header reached, state=29
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:_parse_to: display={sipp}, ruri={sip:sipp at 192.168.68.120:5062}
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:uac:w_replace_from: dsp=0x7ffe38fec2d8 (len=0) , uri=0x7ffe38fec2f0
(len=41)
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
ERROR:uac:replace_uri: decline FROM/TO replacing in sequential request
in auto mode (has TO tag)
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
ERROR:uac:replace_uri: decline FROM/TO replacing in sequential request
in auto mode (has TO tag)
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:MD5StringArray: MD5 calculated: 100352e3496e8c8bc067bbd48b3fff67
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_headers: flags=60
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:parse_headers: flags=ffffffffffffffff
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:forward_request: sending:#012ACK
sip:+32478720104 at x.y.z.t:*5060*;transport=udp;alias=x.y.z.t~11000~1 SIP>
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:forward_request: orig. len=419, new_len=510, proto=1
Sep 12 10:45:38 sipp /data/opensips/sbin/opensips[1684]:
DBG:core:destroy_avp_list: destroying list 0x7f9d4b464ae8


On 12/09/2022 16:24, johan wrote:
> Hi,
>
> setup : opensips acts as a client of a remote server (i.e. opensips
> registers itself towards a provider) and handles the OPTIONS being
> sent.   On the same pc I have a sipp instance that generates traffic.
>
> hence
>
>
> provider <- udp 5060 -> opensips <-udp 5062-> sipp
>
>
> The issue is now that the provider changes the contact in 200 ok.
>
> Hence in sipp I take the contact from the received 200 and then I put in
> the request uri of the ACK.
>
> the problem si opensips rewrites the contact.
>
> How can I avoid that ?
>
>
> route{
>     # ASYNC PROCESSING => opensips handles it
>     if (is_method("OPTIONS|NOTIFY|SUBSCRIBE")) {
>         send_reply(200,"OK");
>         drop();
>     }
>     
>     if ($sp==IADPORT)   
>     {
>         xlog("from iad sp==$sp==IADPORT, we rewrite to sipp listening
> port SIPPPORT and we forward to SIPPIP");
>         sethostport("SIPPIP:SIPPPORT");
>         forward("SIPPIP:SIPPPORT");
>        
>     }
>     else if ($sp==SIPPPORT)
>     {
>         xlog("from sipp sp==$sp==SIPPPORT, we rewrite to iad listening
> port IADPORT and we forward to IADIP");
>         sethostport("IADIP:IADPORT");
>         forward("IADIP:IADPORT");
>     }
>     else
>     {
>         xlog("sp==$sp!=[IADPORT,SIPPPORT], we drop the packet");
>         drop();
>     }
> }
>
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