1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
.\"-
.\" Copyright (c) 1999 Dag-Erling Coïdan Smørgrav
.\" 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
.\" in this position and unchanged.
.\" 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. The name of the author may not be used to endorse or promote products
.\" derived from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
.\"
.\" $FreeBSD$
.\"
.Dd July 9, 2009
.Dt SOCKSTAT 1
.Os
.Sh NAME
.Nm sockstat
.Nd list open sockets
.Sh SYNOPSIS
.Nm
.Op Fl 46cLlu
.Op Fl p Ar ports
.Op Fl P Ar protocols
.Sh DESCRIPTION
The
.Nm
command lists open Internet or
.Ux
domain sockets.
.Pp
The following options are available:
.Bl -tag -width Fl
.It Fl 4
Show
.Dv AF_INET
(IPv4) sockets.
.It Fl 6
Show
.Dv AF_INET6
(IPv6) sockets.
.It Fl c
Show connected sockets.
.It Fl L
Only show Internet sockets if the local or foreign addresses are not
in the loopback network prefix
.Li 127.0.0.0/8 ,
or do not contain the IPv6 loopback address
.Li ::1 .
.It Fl l
Show listening sockets.
.It Fl p Ar ports
Only show Internet sockets if either the local or foreign port number
is on the specified list.
The
.Ar ports
argument is a comma-separated list of port numbers and ranges
specified as first and last port separated by a dash.
.It Fl P Ar protocols
Only show sockets of the specified
.Ar protocols .
The
.Ar protocols
argument is a comma-separated list of protocol names,
as they are defined in
.Xr protocols 5 .
.It Fl u
Show
.Dv AF_LOCAL
.Pq Ux
sockets.
.El
.Pp
If neither
.Fl 4 , 6
or
.Fl u
is specified,
.Nm
will list sockets in all three domains.
.Pp
If neither
.Fl c
or
.Fl l
is specified,
.Nm
will list both listening and connected sockets.
.Pp
The information listed for each
socket is:
.Bl -tag -width "FOREIGN ADDRESS"
.It Li USER
The user who owns the socket.
.It Li COMMAND
The command which holds the socket.
.It Li PID
The process ID of the command which holds the socket.
.It Li FD
The file descriptor number of the socket.
.It Li PROTO
The transport protocol associated with the socket for Internet
sockets, or the type of socket (stream or datagram) for
.Ux
sockets.
.It Li LOCAL ADDRESS
For Internet sockets, this is the address the local end of the socket
is bound to (see
.Xr getsockname 2 ) .
For bound
.Ux
sockets, it is the socket's filename.
For other
.Ux
sockets, it is a right arrow followed by the endpoint's filename, or
.Dq Li ??
if the endpoint could not be determined.
.It Li FOREIGN ADDRESS
(Internet sockets only)
The address the foreign end of the socket is bound to (see
.Xr getpeername 2 ) .
.El
.Pp
Note that TCP sockets in the
.Dv AF_INET
or
.Dv AF_INET6
domains that are not in one of the
.Dv LISTEN , SYN_SENT ,
or
.Dv ESTABLISHED
states may not be shown by
.Nm ;
use
.Xr netstat 1
to examine them instead.
.Sh SEE ALSO
.Xr fstat 1 ,
.Xr netstat 1 ,
.Xr procstat 1 ,
.Xr inet 4 ,
.Xr inet6 4 ,
.Xr protocols 5
.Sh HISTORY
The
.Nm
command appeared in
.Fx 3.1 .
.Sh AUTHORS
The
.Nm
command and this manual page were written by
.An Dag-Erling Sm\(/orgrav Aq des@FreeBSD.org .
.Sh BUGS
Unlike
.Xr netstat 1 ,
.Nm
lists sockets by walking file descriptor tables and will not output
the ones owned by the kernel, e.g. NLM sockets created by
.Xr rpc.lockd 8 .
|
