[asterisk-bugs] [JIRA] (ASTERISK-23020) PJSip - Multihomed machine returning wrong IP address

[xrobau (JIRA)]

xrobau created ASTERISK-23020:
---------------------------------

             Summary: PJSip - Multihomed machine returning wrong IP address
                 Key: ASTERISK-23020
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23020
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_pjsip
    Affects Versions: 12.0.0-beta2
            Reporter: xrobau


Multihomed machine has two interfaces:

eth0.10 = 192.168.15.5/24  (default gateway via this int)
eth0.20 = 192.168.5.247/24 

Phone endpoint is connected to eth0.20, with the IP Address 192.168.5.248

Connecting works fine, but in the OK packet returned from the server, the wrong IP address is handed back:


        v=0
        o=- 7132004 7132006 IN IP4 localhost.localdomain
        s=Asterisk
        c=IN IP4 192.168.15.5
        t=0 0
        m=audio 17940 RTP/AVP 8 101
        c=IN IP4 192.168.15.5
        a=rtpmap:8 PCMA/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-16
        a=ptime:20
        a=maxptime:150
        a=sendrecv

This causes the phone to try to connect to the wrong IP address which is not reachable from the other network.

Larger TCPdump attached

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