stream feature which similar wireshark

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Hi Dirk, 

    I have a feature question about stream.

    I have a device, communicated with PC throuth network card. The process was done by itself, I mean it send and recevie automaticly without EPICS.

    And could I got the receive message,using EPICS stream? 

    I puzzled that, normally stream send the out command, then get the in message. Now the device send and recive by itself, could stream( in PC) get the in message?

Regards,

Liang