Updated: 2021/Apr/14

SHMIF_DUMPBUS(1)            General Commands Manual           SHMIF_DUMPBUS(1)

     shmif_dumpbus - examine shmif bus contents

     shmif_dumpbus [-h] [-p pcapfile] busfile

     The shmif_dumpbus utility examines the bus of an shmif(4) Ethernet
     interface.  The most useful feature is converting the bus to the pcap(3)
     file format for later examination.  shmif_dumpbus itself is limited to
     displaying only very basic information about each frame.

     shmif_dumpbus accepts the following flags:

     -h              Print bus header only and skip contents.

     -p pcapfile     Convert bus contents to the pcap(3) format and write the
                     result to pcapfile.  The file - signifies stdout.

     Feed the busfile contents to pcap:

           $ shmif_dumpbus -p - busfile | tcpdump -r -

     pcap(3), shmif(4), tcpdump(8)

     shmif_dumpbus does not lock the busfile and is best used for post-mortem
     analysis of the bus traffic.

     The timestamp for each frame contains the sender's timestamp and may not
     be monotonically increasing with respect to the frame order in the dump.

NetBSD 9.99                    January 12, 2011                    NetBSD 9.99