[SR-Users] How to eliminate Content-Length:0 from sl_send_reply

Alex Balashov abalashov at evaristesys.com
Tue Apr 25 14:23:35 CEST 2017


Hello,

What leads you to the conclusion that the 

   Content-Length: 0 

header is "extra", and in need of a "workaround"?

-- Alex

On Tue, Apr 25, 2017 at 12:21:32PM +0000, Pranathi Venkatayogi wrote:

> Hi,
>   How do I eliminate Content-Length:0 from sip reply when using sl_send_reply?
>   I wanted to generate 200 ok, with SDP payload. I appended headers like below. The packet seems ok except there is extra "Content-Length:0", which is causing problems. Any workarounds?
> 
>    The packet being generated is: Note the extra content-length: 0 at the end.
> SIP/2.0 200 OK
> Via: SIP/2.0/UDP 10.0.0.12:59404;rport=59404;branch=z9hG4bKPjb7d0391f8f7f479b812f6e5feadfa3c5;received=10.11.200.46
> From: "cust1" <sip:cust1 at devtranslation.sms-test.cyracom.com>;tag=afcffa277e2a43dc88fafc612f538864
> To: <sip:spanish at devtranslation.sms-test.cyracom.com>;tag=37b119f34ca40c158c5b7306e1aa8d72.b73a
> Call-ID: 7f73e5d03e15425395fac930eae423bd
> CSeq: 31419 INVITE
> Content-Type: application/sdp
> Content-Length: 350
> 
> v=0
> o=- 3688213899 3688213900 IN IP4 10.99.52.17
> s=Blink 1.4.2 (Windows)
> t=0 0
> m=message 2855 TCP/MSRP *
> c=IN IP4 10.99.52.17
> a=path:msrps://10.99.52.17:2855/116701522521345;tcp
> a=accept-types:message/cpim text/* image/* application/im-iscomposing+xml
> a=accept-wrapped-types:text/* image/* application/im-iscomposing+xml
> a=setup:active
> Content-Length: 0
> 
> Code in config is:
>         append_to_reply("Content-Type: application/sdp\r\n");
>         append_to_reply("Content-Length:   350\r\n");
>         append_to_reply("\r\n");
>         append_to_reply("v=0\r\n");
>         append_to_reply("o=- 3688213899 3688213900 IN IP4 MY_IP_ADDR\r\n");
>         append_to_reply("s=Blink 1.4.2 (Windows)\r\n");
>         append_to_reply("t=0 0\r\n");
>         append_to_reply("m=message 2855 TCP/MSRP *\r\n");
>         append_to_reply("c=IN IP4 MY_IP_ADDR\r\n");
>         append_to_reply("a=path:msrps://MY_IP_ADDR:2855/$var(ssessid);tcp\r\n");
>         append_to_reply("a=accept-types:message/cpim text/* image/* application/im-iscomposing+xml\r\n");
>         append_to_reply("a=accept-wrapped-types:text/* image/* application/im-iscomposing+xml\r\n");
>         append_to_reply("a=setup:active\r\n");
> 
>         sl_send_reply("200", "OK");
> 
> Thanks,
> Pranathi Venkatayogi
> System Developer II
> (520) 745-9447 x4466
> www.cyracom.com<http://www.cyracom.com/>
> 
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-- 
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) 
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/



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