[asterisk-bugs] [JIRA] (ASTERISK-30362) SDP o= header address changed in re-INVITE message

[Vitezslav Novy (JIRA)]

Vitezslav Novy created ASTERISK-30362:
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             Summary: SDP o= header address changed in re-INVITE message
                 Key: ASTERISK-30362
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-30362
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Resources/res_pjsip_session
    Affects Versions: 18.10.1
         Environment: Debian 11
            Reporter: Vitezslav Novy


We noticed on one of our sites, that address in o= SDP header in re-INVITE message triggered by directmedia=ýes is different from address in first INVITE. It is violation of  RFC 3264 sec. 8 

Analyzing create_local_sdp() it seems that in our case the o= address in re-INVITE SDP is total last resort get by ast_sip_get_host_ip_string(). Anyway I'm not sure if local->con, which is source of o= address when it is set, is stable enough to guarantee same address during whole session.

I have created patch for us which uses address from ast_sip_get_host_ip_string() for o= header in all cases and guarantees same address during session. 




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