freebsd-skq/usr.bin/sockstat/sockstat.pl
Dag-Erling Smørgrav d397408818 Usage style sweep: spell "usage" with a small 'u'.
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.
2002-04-22 13:44:47 +00:00

247 lines
6.4 KiB
Perl

#!/usr/bin/perl -w
#-
# 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.
#
# $FreeBSD$
#
use strict;
use Getopt::Std;
my %netstat;
my %fstat;
my $unknown = [ "?", "?", "?", "?", "?", "?", "?", "?", "?" ];
my $inet_fmt = "%-8.8s %-8.8s %5.5s %4.4s %-6.6s %-21.21s %-21.21s\n";
my $unix_fmt = "%-8.8s %-8.8s %5.5s %4.4s %-6.6s %-43.43s\n";
my @ranges;
#
# Parse a port range specification
#
sub parse_port_ranges($) {
my $spec = shift; # Range spec
my $range; # Range
my ($low, $high); # Low/high ends of range
foreach $range (split(/\s*,\s*/, $spec)) {
if ($range =~ m/^(\d+)-(\d+)$/) {
($low, $high) = ($1, $2);
} elsif ($range =~ m/^-(\d+)$/) {
($low, $high) = (1, $1);
} elsif ($range =~ m/^(\d+)-$/) {
($low, $high) = ($1, 65535);
} elsif ($range =~ m/^(\d+)$/) {
$low = $high = $1;
} else {
die("invalid range specification: $range\n");
}
if ($low < 0 || $low > 65535 || $high < 0 || $high > 65535) {
die("valid ports numbers are 1-65535 inclusive\n");
}
if ($low > $high) {
$low ^= $high;
$high ^= $low;
$low ^= $high;
}
push(@ranges, [ $low, $high ]);
}
}
#
# Check if a port is in an allowed range
#
sub check_range($) {
my $addr = shift; # Address to check
my $port; # Port number
my $range; # Range
if (@ranges == 0) {
return 1;
}
if ($addr !~ m/\.(\d+)$/) {
return undef;
}
$port = $1;
foreach $range (@ranges) {
if ($port >= $range->[0] && $port <= $range->[1]) {
return 1;
}
}
return undef;
}
#
# Gather information about sockets
#
sub gather() {
local *PIPE; # Pipe
my $pid; # Child PID
my $line; # Input line
my @fields; # Fields
# Netstat
if (!defined($pid = open(PIPE, "-|"))) {
die("open(netstat): $!\n");
} elsif ($pid == 0) {
exec("/usr/bin/netstat", "-AanW");
die("exec(netstat): $!\n");
}
while ($line = <PIPE>) {
next unless ($line =~ m/^[0-9a-f]{8} /) || ($line =~ m/^[0-9a-f]{16} /);
chomp($line);
@fields = split(' ', $line);
$netstat{$fields[0]} = [ @fields ];
}
close(PIPE)
or die("close(netstat): $!\n");
# Fstat
if (!defined($pid = open(PIPE, "-|"))) {
die("open(fstat): $!\n");
} elsif ($pid == 0) {
exec("/usr/bin/fstat");
die("exec(fstat): $!\n");
}
while ($line = <PIPE>) {
chomp($line);
@fields = split(' ', $line);
next if ($fields[4] eq "-");
push(@{$fstat{$fields[4]}}, [ @fields ]);
}
close(PIPE)
or die("close(fstat): $!\n");
}
#
# Replace the last dot in an "address.port" string with a colon
#
sub addr($) {
my $addr = shift; # Address
$addr =~ s/^(.*)\.([^\.]*)$/$1:$2/;
return $addr;
}
#
# Print information about Internet sockets
#
sub print_inet($$$) {
my $af = shift; # Address family
my $conn = shift || 0; # Show connected sockets
my $listen = shift || 0; # Show listen sockets
my $fsd; # Fstat data
my $nsd; # Netstat data
printf($inet_fmt, "USER", "COMMAND", "PID", "FD",
"PROTO", "LOCAL ADDRESS", "FOREIGN ADDRESS");
foreach $fsd (@{$fstat{$af}}) {
next unless defined($fsd->[7]);
$nsd = $netstat{$fsd->[7]} || $unknown;
next unless (check_range($nsd->[4]) || check_range($nsd->[5]));
next if (!$conn && $nsd->[5] ne '*.*');
next if (!$listen && $nsd->[5] eq '*.*');
printf($inet_fmt, $fsd->[0], $fsd->[1], $fsd->[2],
substr($fsd->[3], 0, -1),
$nsd->[1], addr($nsd->[4]), addr($nsd->[5]));
}
print("\n");
}
#
# Print information about Unix domain sockets
#
sub print_unix($$) {
my $conn = shift || 0; # Show connected sockets
my $listen = shift || 0; # Show listen sockets
my %endpoint; # Mad PCB to process/fd
my $fsd; # Fstat data
my $nsd; # Netstat data
foreach $fsd (@{$fstat{"local"}}) {
$endpoint{$fsd->[6]} = "$fsd->[1]\[$fsd->[2]\]:" .
substr($fsd->[3], 0, -1);
}
printf($unix_fmt, "USER", "COMMAND", "PID", "FD", "PROTO", "ADDRESS");
foreach $fsd (@{$fstat{"local"}}) {
next unless defined($fsd->[6]);
next if (!$conn && defined($fsd->[8]));
next if (!$listen && !defined($fsd->[8]));
$nsd = $netstat{$fsd->[6]} || $unknown;
printf($unix_fmt, $fsd->[0], $fsd->[1], $fsd->[2],
substr($fsd->[3], 0, -1), $fsd->[5],
$nsd->[8] || ($fsd->[8] ? $endpoint{$fsd->[8]} : "(none)"));
}
print("\n");
}
#
# Print usage message and exit
#
sub usage() {
print(STDERR "usage: sockstat [-46clu] [-p ports]\n");
exit(1);
}
MAIN:{
my %opts; # Command-line options
getopts("46clp:u", \%opts)
or usage();
gather();
if (!$opts{'4'} && !$opts{'6'} && !$opts{'u'}) {
$opts{'4'} = $opts{'6'} = $opts{'u'} = 1;
}
if (!$opts{'c'} && !$opts{'l'}) {
$opts{'c'} = $opts{'l'} = 1;
}
if ($opts{'p'}) {
parse_port_ranges($opts{'p'});
}
if ($opts{'4'}) {
print_inet("internet", $opts{'c'}, $opts{'l'});
}
if ($opts{'6'}) {
print_inet("internet6", $opts{'c'}, $opts{'l'});
}
if ($opts{'u'}) {
print_unix($opts{'c'}, $opts{'l'});
}
exit(0);
}