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author | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
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committer | rgrimes <rgrimes@FreeBSD.org> | 1994-05-27 12:33:43 +0000 |
commit | f9ab90d9d6d02989a075d0f0074496d5b1045e4b (patch) | |
tree | add7e996bac5289cdc55e6935750c352505560a9 /usr.bin/netstat/netstat.1 | |
parent | be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da (diff) | |
download | FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.zip FreeBSD-src-f9ab90d9d6d02989a075d0f0074496d5b1045e4b.tar.gz |
BSD 4.4 Lite Usr.bin Sources
Diffstat (limited to 'usr.bin/netstat/netstat.1')
-rw-r--r-- | usr.bin/netstat/netstat.1 | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/usr.bin/netstat/netstat.1 b/usr.bin/netstat/netstat.1 new file mode 100644 index 0000000..fc0d303 --- /dev/null +++ b/usr.bin/netstat/netstat.1 @@ -0,0 +1,289 @@ +.\" Copyright (c) 1983, 1990, 1992, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)netstat.1 8.8 (Berkeley) 4/18/94 +.\" +.Dd April 18, 1994 +.Dt NETSTAT 1 +.Os BSD 4.2 +.Sh NAME +.Nm netstat +.Nd show network status +.Sh SYNOPSIS +.Nm netstat +.Op Fl Aan +.Op Fl f Ar address_family +.Op Fl M Ar core +.Op Fl N Ar system +.Nm netstat +.Op Fl dghimnrs +.Op Fl f Ar address_family +.Op Fl M Ar core +.Op Fl N Ar system +.Nm netstat +.Op Fl dn +.Op Fl I Ar interface +.Op Fl M Ar core +.Op Fl N Ar system +.Op Fl w Ar wait +.Nm netstat +.Op Fl p Ar protocol +.Op Fl M Ar core +.Op Fl N Ar system +.Sh DESCRIPTION +The +.Nm netstat +command symbolically displays the contents of various network-related +data structures. +There are a number of output formats, +depending on the options for the information presented. +The first form of the command displays a list of active sockets for +each protocol. +The second form presents the contents of one of the other network +data structures according to the option selected. +Using the third form, with a +.Ar wait +interval specified, +.Nm netstat +will continuously display the information regarding packet +traffic on the configured network interfaces. +The fourth form displays statistics about the named protocol. +.Pp +The options have the following meaning: +.Bl -tag -width flag +.It Fl A +With the default display, +show the address of any protocol control blocks associated with sockets; used +for debugging. +.It Fl a +With the default display, +show the state of all sockets; normally sockets used by +server processes are not shown. +.It Fl d +With either interface display (option +.Fl i +or an interval, as described below), +show the number of dropped packets. +.It Fl f Ar address_family +Limit statistics or address control block reports to those +of the specified +.Ar address family . +The following address families +are recognized: +.Ar inet , +for +.Dv AF_INET , +.Ar ns , +for +.Dv AF_NS , +.Ar iso , +for +.Dv AF_ISO , +and +.Ar unix , +for +.Dv AF_UNIX . +.It Fl g +Show information related to multicast (group address) routing. +By default, show the IP Multicast virtual-interface and routing tables. +If the +.Fl s +option is also present, show multicast routing statistics. +.It Fl h +Show the state of the +.Tn IMP +host table (obsolete). +.It Fl I Ar interface +Show information about the specified interface; +used with a +.Ar wait +interval as described below. +.It Fl i +Show the state of interfaces which have been auto-configured +(interfaces statically configured into a system, but not +located at boot time are not shown). +If the +.Fl a +options is also present, multicast addresses currently in use are shown +for each Ethernet interface and for each IP interface address. +Multicast addresses are shown on separate lines following the interface +address with which they are associated. +.It Fl M +Extract values associated with the name list from the specified core +instead of the default +.Pa /dev/kmem . +.It Fl m +Show statistics recorded by the memory management routines +(the network manages a private pool of memory buffers). +.It Fl N +Extract the name list from the specified system instead of the default +.Pa /vmunix . +.It Fl n +Show network addresses as numbers (normally +.Nm netstat +interprets addresses and attempts to display them +symbolically). +This option may be used with any of the display formats. +.It Fl p Ar protocol +Show statistics about +.Ar protocol , +which is either a well-known name for a protocol or an alias for it. Some +protocol names and aliases are listed in the file +.Pa /etc/protocols . +A null response typically means that there are no interesting numbers to +report. +The program will complain if +.Ar protocol +is unknown or if there is no statistics routine for it. +.It Fl s +Show per-protocol statistics. +If this option is repeated, counters with a value of zero are suppressed. +.It Fl r +Show the routing tables. +When +.Fl s +is also present, show routing statistics instead. +.It Fl w Ar wait +Show network interface statistics at intervals of +.Ar wait +seconds. +.El +.Pp +The default display, for active sockets, shows the local +and remote addresses, send and receive queue sizes (in bytes), protocol, +and the internal state of the protocol. +Address formats are of the form ``host.port'' or ``network.port'' +if a socket's address specifies a network but no specific host address. +When known the host and network addresses are displayed symbolically +according to the data bases +.Pa /etc/hosts +and +.Pa /etc/networks , +respectively. If a symbolic name for an address is unknown, or if +the +.Fl n +option is specified, the address is printed numerically, according +to the address family. +For more information regarding +the Internet ``dot format,'' +refer to +.Xr inet 3 ) . +Unspecified, +or ``wildcard'', addresses and ports appear as ``*''. +.Pp +The interface display provides a table of cumulative +statistics regarding packets transferred, errors, and collisions. +The network addresses of the interface +and the maximum transmission unit (``mtu'') are also displayed. +.Pp +The routing table display indicates the available routes and +their status. Each route consists of a destination host or network +and a gateway to use in forwarding packets. The flags field shows +a collection of information about the route stored as +binary choices. The individual flags are discussed in more +detail in the +.Xr route 8 +and +.Xr route 4 +manual pages. +The mapping between letters and flags is: +.Bl -column XXXX RTF_BLACKHOLE +1 RTF_PROTO2 Protocol specific routing flag #1 +2 RTF_PROTO1 Protocol specific routing flag #2 +B RTF_BLACKHOLE Just discard pkts (during updates) +C RTF_CLONING Generate new routes on use +D RTF_DYNAMIC Created dynamically (by redirect) +G RTF_GATEWAY Destination requires forwarding by intermediary +H RTF_HOST Host entry (net otherwise) +L RTF_LLINFO Valid protocol to link address translation. +M RTF_MODIFIED Modified dynamically (by redirect) +R RTF_REJECT Host or net unreachable +S RTF_STATIC Manually added +U RTF_UP Route usable +X RTF_XRESOLVE External daemon translates proto to link address +.El +.Pp +Direct routes are created for each +interface attached to the local host; +the gateway field for such entries shows the address of the outgoing interface. +The refcnt field gives the +current number of active uses of the route. Connection oriented +protocols normally hold on to a single route for the duration of +a connection while connectionless protocols obtain a route while sending +to the same destination. +The use field provides a count of the number of packets +sent using that route. The interface entry indicates the network +interface utilized for the route. +.Pp +When +.Nm netstat +is invoked with the +.Fl w +option and a +.Ar wait +interval argument, it displays a running count of statistics related to +network interfaces. +An obsolescent version of this option used a numeric parameter +with no option, and is currently supported for backward compatibility. +This display consists of a column for the primary interface (the first +interface found during autoconfiguration) and a column summarizing +information for all interfaces. +The primary interface may be replaced with another interface with the +.Fl I +option. +The first line of each screen of information contains a summary since the +system was last rebooted. Subsequent lines of output show values +accumulated over the preceding interval. +.Sh SEE ALSO +.Xr iostat 1 , +.Xr nfsstat 1 , +.Xr ps 1 , +.Xr vmstat 1 , +.Xr hosts 5 , +.Xr networks 5 , +.Xr protocols 5 , +.Xr services 5 , +.Xr trpt 8 , +.Xr trsp 8 +.Sh HISTORY +The +.Nm netstat +command appeared in +.Bx 4.2 . +.\" .Sh FILES +.\" .Bl -tag -width /dev/kmem -compact +.\" .It Pa /vmunix +.\" default kernel namelist +.\" .It Pa /dev/kmem +.\" default memory file +.\" .El +.Sh BUGS +The notion of errors is ill-defined. |