[asterisk-bugs] [JIRA] (ASTERISK-24387) res_pjsip: rport sent from UAS MUST include the port that the UAC sent the request on

[Matt Jordan (JIRA)]

Matt Jordan created ASTERISK-24387:
--------------------------------------

             Summary: res_pjsip: rport sent from UAS MUST include the port that the UAC sent the request on
                 Key: ASTERISK-24387
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24387
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_pjsip
    Affects Versions: 13.0.0-beta2, 12.6.0
            Reporter: Matt Jordan


When {{force_rport=Yes}} and a request is received without an rport, Asterisk will respond with an {{rport}} parameter in the top-most {{Via}} header without a specified port. Arguably, every response from the UAS should specify the port with the {{rport}} parameter:

{quote}
 When a server compliant to this specification (which can be a proxy
   or UAS) receives a request, it examines the topmost Via header field
   value.  If this Via header field value contains an "rport" parameter
   with no value, it MUST set the value of the parameter to the source
   port of the request.
{quote}

Now, since there *was* no {{rport}} in the request, this is a bit murky. On the other hand, we probably should always provide the port with the {{rport}}, as this is more specific (and a bit more clear) than simply responding with {{rport}} and nothing else.

A sample rejected call flow by the client is attached to the issue.



--
This message was sent by Atlassian JIRA
(v6.2#6252)