Hello,
probably the source and and specs have to be checked in this case, but
meanwhile one can use the transformations to trim whitespaces at the
beginning or end of a string (iirc: $(avp(sdp){s.trim}) ).
Cheers,
Daniel
On 01.11.24 14:02, James Browne via sr-users wrote:
> The sdp_get() function from sdpops returns an extra blank line
> sometimes, which looks like a bug to me. When I have an SDP that's in
> MIME, there's an extra newline at the end of the extracted SDP.
> Here's a sample config. I use 5.8.1 for testing.
>
> ####################
> #!KAMAILIO
> listen=udp:203.0.113.57:5060
> debug=1
> loadmodule "sdpops"
> loadmodule "pv"
> loadmodule "xlog"
> request_route{exit;}
> reply_route {
> sdp_get("$avp(sdp)");
> xlog("L_NOTICE", "[$ci] The SDP is [$avp(sdp)].\n");
> }
> ####################
>
> Here are two sample SIP-message bodies.
> ####################
> v=0
> o=PCD 1730 1730 IN IP4 198.18.114.148
> s=PCD
> c=IN IP4 198.18.114.148
> t=0 0
> m=audio 29426 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
> ####################
>
> ####################
> --e61e7a6a-16a2-46c0-adbb-a41ba86d32a2
> Content-Type: application/sdp
> Content-Length: 130
>
> v=0
> o=PCD 1730 1730 IN IP4 198.18.114.148
> s=PCD
> c=IN IP4 198.18.114.148
> t=0 0
> m=audio 29426 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
>
> --e61e7a6a-16a2-46c0-adbb-a41ba86d32a2--
> ####################
>
> When the first body is received, the xlog correctly ends with this.
> m=audio 29426 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
> ] with length 130
>
> When the second body is received, the xlog incorrectly ends with this,
> which has an extra newline in it.
> m=audio 29426 RTP/AVP 0
> a=rtpmap:0 PCMU/8000
>
> ] with length 132
>
> According to RFC2046, "The CRLF preceding the boundary delimiter line
> is conceptually attached to the boundary", but it looks like kamailio
> has a bug that incorrectly processes this.
>
> James
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Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
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