Hello,

It seems that when calling the function sdp_get_line_startswith, it removes the \r (0d in hexa) from the SIP message before forwarding it. In the code (sdpops_mod.c) from line 1402 to 1406, we see that

// remove ending \r\n if exists
      if (avp_val.s.s[line.len-2] == '\r' && avp_val.s.s[line.len-1] == '\n')
      {
          avp_val.s.s[line.len-2] = '\0';
          avp_val.s.len -= 2;
      }

As avp_val is the pointer pointing directly to the line in the message, all modification made to this variable will also be applied to the message.

Am I wrong?

Regards,