[Freeswitch-users] Homer SIP capture integration

[Peter Steinbach]

Hello,

I was following http://code.google.com/p/homer/wiki/HOWTO#Capture_Agent
to have "Homer Sip capture" capturing an displaying a SIP Packets from
freeswitch.

This worked quite well on a Debian based system. But now we migrated it
to Centos 6 and it does not work anymore, although we used the identical
kamailio source code base. I think the underlying xml parser libs
somehow work differently on Centos.

What is puzzling me is the following
Apr  4 10:33:12 homer2centos /usr/local/sbin/kamailio[20698]: ERROR:
<core> [parser/msg_parser.c:705]: parse_msg(): ERROR: parse_msg:
message=<#001#020#002#021#023a#023aaaaaaaSIP/2.0 480 Temporarily

You can see that in front of the SIP message coming from freeswitch
there are some additional chars "#001#020#002#021#023a#023aaaaaaa".  And
by wiresharking the SIP packages, Freeswitch in fact preceedes the SIP
message it sends to homer with these additional bytes.
Using a Debian based Kamailio this does not cause problems on the
Kamailio/Homer side, buit on Centos it does.

So my question is: Is this the right behaviour of Freeswitch when
forking the SIP message to the capture server?

In https://groups.google.com/forum/#!topic/homer-discuss/KhBF0Dy44SU I
found the following
>The problem was found: freeswitch duplicate all packets on SIP port
including empty "ping" messages.
>with mobile regards,
>Alexandr

Although I do not really understand the part "including empty ping
messages": Is there a way to suppress these ping messages?


Here is a complete error message:
Apr  4 10:33:12 homer2centos /usr/local/sbin/kamailio[20698]: INFO:
<core> [parser/parse_fline.c:229]: parse_first_line():
ERROR:parse_first_line: bad request first line
Apr  4 10:33:12 homer2centos /usr/local/sbin/kamailio[20698]: INFO:
<core> [parser/parse_fline.c:231]: parse_first_line(): ERROR: at line 0
char 39:
Apr  4 10:33:12 homer2centos /usr/local/sbin/kamailio[20698]: INFO:
<core> [parser/parse_fline.c:237]: parse_first_line(): ERROR: parsed so
far: #001#020#002#021#023a#023aaaaaaaSIP/2.0 480 Temporarily
Apr  4 10:33:12 homer2centos /usr/local/sbin/kamailio[20698]: INFO:
<core> [parser/parse_fline.c:242]: parse_first_line():
ERROR:parse_first_line: bad message
Apr  4 10:33:12 homer2centos /usr/local/sbin/kamailio[20698]: ERROR:
<core> [parser/msg_parser.c:705]: parse_msg(): ERROR: parse_msg:
message=<#001#020#002#021#023a#023aaaaaaaSIP/2.0 480 Temporarily
Unavailable#015#012Via: SIP/2.0/UDP
192.168.178.204:5060;branch=z9hG4bK6569ec1b;rport=5060#015#012Max-Forwards:
70#015#012From: "06081688533"
<sip:06081688533 at 192.168.178.204>;tag=as190e467c#015#012To:
<sip:4488329 at 192.168.178.220:5090>;tag=1D8c28jZaF72r#015#012Call-ID:
17888b4f3812b7686fbaf0ca380be672 at 192.168.178.204#015#012CSeq: 102
INVITE#015#012User-Agent:
FreeSWITCH-mod_sofia/1.5.11b+git~20140305T111532Z~783a4083ed~64bit#015#012Accept:
application/sdp#015#012Allow: INVITE, ACK, BYE, CANCEL, OPTIONS,
MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY#015#012Supported: timer,
path, replaces#015#012Allow-Events: talk, hold, conference,
refer#015#012Reason:
Q.850;cause=16;text="NORMAL_CLEARING"#015#012Content-Length:
0#015#012Remote-Party-ID: "4488329"
<sip:4488329 at 192.168.178.220>;party=calling;privacy=off;screen=no#015#012#015#012>
Apr  4 10:33:12 homer2centos /usr/local/sbin/kamailio[20698]: ERROR:
<core> [receive.c:146]: receive_msg(): ERROR: receive_msg: parse_msg failed

-- 
With kind regards
Peter Steinbach 

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