pfstat - Print packet filter status information
/usr/bin/pfstat [options] [system]
If no options are given, then all are assumed (except for the verbose
Counts. Displays various counts (per ethernet unit) including
number of packets sent and received, the number of packets dropped due to
full input queues, the number of packets not wanted by any filter, and the
number of packets missed by the interface.
Descriptors. Displays OpenDescriptors for each minor device.
Filters. Displays packet filters for each minor device.
Parameters. Displays device parameters including device type,
header and address lengths, maximum transmission units (MTU), and interface
and broadcast addresses.
QueueElements. Displays the QueueElements.
Scavenger. Displays the FreeQueue and Scavenger statistics.
Verbose. Displays information for minor devices not actually
in use and complete queue information, only if this option is given.
Limits output to information about specified units. If no
digits are given, all units are displayed. Valid digits are 0 to 7.
command interprets the data structures of the packet filter
packetfilter(7). The data structures are contained in
is given, the required
namelist is taken from there; otherwise, it is taken from
Some of the output is a bit cramped to fit on an 80-character line. It should be possible to get a less verbose but more readable listing.
Since things happen quickly, it is not likely that
will provide a consistent view of a running system. It is mostly useful for
analyzing static or slowly-varying problems, not transient ones.
This section describes the information displayed in the output of the
command under the headings
Minor device number for open descriptor.
Forward link to other descriptors.
Blank, or one of the following:
Waiting for input, indefinite wait
Waiting for input, timed wait
Has timed out
Addresses of ``Queue Elements'' for waiting packets.
Number of packets queued for input/maximum for this queue.
Timeout duration in clock ticks (if the
[Verbose] option is not given, then times may be expressed as minutes [with
a trailing ``m''], hours [with a trailing ``h''], or simply ``long'', to keep
the columns lined up.)
Shows which mode bits are set for the minor device; each bit
is encoded as a single character:
An unknown mode bit is set.
Signal number to be delivered when a packet arrives.
Process to be signaled when a packet arrives.
Process id which enabled the signal.
Minor device number of filter.
Count of packets accepted by this filter.
Count of ``recent'' drops for this filter.
Priority of filter. (Not applicable to BPF-style filters.)
Length of filter (in shortwords).
for interpretation of packet
for interpretation of BPF-style filters.
Location of queue element.
Forward and backward links.
Reference count for queue element.
Per-packet flag bits set; each bit is encoded as a single
An unknown flag bit is set.
Count of packets dropped between the time previous packet
was queued and the time this packet was queued.
Approximate time this packet was received.
Default source of tables
Commands: netstat(1), pfconfig(8)
Files: bpf(7), packetfilter(7)