SHMIF_DUMPBUS(1) |
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 -
CAVEATS
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.