[Serusers] sdp and rtp errors

[Paul Hazlett]

Rick,

Not all messages will have an SDP payload. In other words the
<Content-Length> head may be zero for some messages.

If you call fix_nated_contact() for these types of message then you
will see these sorts of errors.

We usually do some tests on the SIP message prior to calling these NAT
functions. Check out the Getting Started document www.onsip.org for a
good NAT traversal example.

Regards,
Paul

On 9/19/05, Rick Thompson <rthompson at vir2com.com> wrote:
>  
>  
> 
> Hi All 
> 
>   
> 
> I hope someone can help me with an issue I"ve had since installing ser. For
> some reason, whenever I call fix_nated_sdp or force_rtp_proxy I get the
> following errors 
> 
>   
> 
>   
> 
> Sep 19 10:31:06 localhost ser[3921]: Mon Sep 19 10:31:06 2005 18 a.b.c.d 
> 62141 ****** Fixing NAT on reply with rtp 
> 
> Sep 19 10:31:06 localhost ser[3921]: ERROR: extract_body: message body has
> length zero 
> 
> Sep 19 10:31:06 localhost ser[3921]: ERROR: fix_nated_sdp: cannot extract
> body from msg! 
> 
> Sep 19 10:31:06 localhost ser[3921]: ERROR: extract_body: message body has
> length zero 
> 
> Sep 19 10:31:06 localhost ser[3921]: ERROR: force_rtp_proxy2: can't extract
> body from the message 
> 
> Sep 19 10:31:06 localhost ser[3921]: ERROR: on_reply processing failed 
> 
>   
> 
> Here is the part of the script that is generating the error 
> 
>   
> 
> onreply_route[1] { 
> 
>         xlog("L_ALERT", "%Tf %mf ****** On Reply From: <%si> <%tu> <%fu>
> <%rm> <%rs> <%rr>\n"); 
> 
>         if(status=~"[12][0-9][0-9]" && nat_uac_test("19")) { 
> 
>                 fix_nated_contact(); 
> 
>                 force_rport(); 
> 
>         }; 
> 
>          if(status=~"[12][0-9][0-9]" && nat_uac_test("19") &&
> src_port>=10000) { 
> 
>                         xlog("L_ALERT", "%Tf %mf %si %sp ****** Fixing NAT
> on reply with rtp\n"); 
> 
>                         fix_nated_sdp("3"); 
> 
>                         force_rtp_proxy(); 
> 
>         } else if(status=~"[12][0-9][0-9]" && nat_uac_test("19")) { 
> 
>                 xlog("L_ALERT", "%Tf %mf %si %sp ****** Fixing NAT on reply
> with sdp\n"); 
> 
>                 fix_nated_sdp("3"); 
> 
>                 }; 
> 
> } 
> 
>   
> 
> Any help would be appreciated. 
> 
> Thanks 
> 
>   
> 
>   
> 
> Rick 
> 
>   
> 
>   
> 
>   
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