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.
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.