The Design and Implementation of the Anykernel and Rump Kernels

A–10
SHMIF_DUMPBUS(1) NetBSD General Commands Manual SHMIF_DUMPBUS(1)
NAME
shmif_dumpbus -- examine shmif bus contents
SYNOPSIS
shmif_dumpbus [-h] [-p pcapfile] busfile
DESCRIPTION
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.
EXAMPLES
Feed the busfile contents to pcap:
$ shmif_dumpbus -p - busfile | tcpdump -r -
SEE ALSO
pcap(3), shmif(4), tcpdump(8)
CAVEATS
shmif_dumpbus does not lock the busfile and is best used for post-mortem
analysis of the bus traffic.
NetBSD 5.99.48 January 12, 2011 NetBSD 5.99.48