pfstat(1)pfstat(1)NAMEpfstat - Print packet filter status information
SYNOPSIS
/usr/bin/pfstat [options]
OPTIONS
If no options are given, all are assumed (except for the verbose
option, -v). 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 informa‐
tion about specified units. If no digits are given, all units are dis‐
played. Valid digits are 0 to 7.
DESCRIPTION
The pfstat command interprets the data structures of the packet filter
driver packetfilter(7). The data structures are contained in
/dev/kmem.
RESTRICTIONS
By default, some of the output might not be easily read on an 80-char‐
acter line. You might want to use some of the options to obtain a less
verbose but more readable listing.
Because of the dynamic nature of a running system, pfstat might not
provide a consistent view of the system. You should use this command
for analyzing static or slowly-varying problems, not transient ones.
OUTPUT FORMAT
This section describes the information displayed in the output of the
pfstat command under the headings AllDescriptors, Filters, and
QueueElts.
AllDescriptors
Minor device number for open descriptor. Descriptor location. 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 -v [Verbose] option is not given, the 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: ENHOLDSIG ENBATCH ENTSTAMP ENPROMISC ENNONEXCL ENCOPYALL
ENBPFHDR 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.
Filters
Minor device number of filter. Count of packets accepted by this fil‐
ter. Count of ``recent'' drops for this filter. Priority of filter.
(Not applicable to BPF-style filters.) Length of filter (in short‐
words). See packetfilter(7) for interpretation of packet filters. See
bpf(7) for interpretation of BPF-style filters.
QueueElts
Location of queue element. Forward and backward links. Packet size.
Reference count for queue element. Per-packet flag bits set; each bit
is encoded as a single character: ENSF_PROMISC ENSF_BROADCAST ENSF_MUL‐
TICAST ENSF_TRAILER 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.
FILES
Default source of tables
SEE ALSO
Commands: netstat(1), pfconfig(8)
Files: bpf(7), packetfilter(7)pfstat(1)