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• File src/libosmo-mgcp/mgcp_network.c:

  • Patch Set #2, Line 866:

    HACK: for IuUP, we want to reply with an IuUP Initialization ACK upon the first RTP
    			 * messag
    

    hmm! why is this stuff still here, we have proper IuUP support and everything about this legacy hack […]

    Neels I'm not sure how's that supposed to work without that hack. IIUC the steps are:
    HNBGW <- MSC: RAB-Ass-Req
    HNBGW -> MGW: CRCX (RAN side, remote IuUP IPaddr+port not known)
    HNBGW <- MGW: CRCX ACK (MGW local IuuP IPaddr+port is now known)
    HNB <- HNBGW: RAB-Ass-Req (MGW local IuuP IPaddr+port)
    HNB -> MGW: IuUP Init // THE CODE YOU REMOVED IS NEEDED HERE
    HNB <- MGW: IuUP Init ACK
    HNB -> HNBGW: RAB-Ass-Resp
    HNBGW -> MGW: MDCX (RAN side, remote IuUP IPaddr+port is now known)
    HNBGW <- MGW: MDCX ACK
    HNBGW -> MSC: RAB-Ass-Resp

    So IIUC IuUP Init happens before receiving RAB-ASs-resp, so MGW cannot know the remote IuUP IP addr + port when receiving the IuUP Init packet from HNB...

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