Allow the user to specify port ranges against which to match inet sockets.
Suggested by: roam
This commit is contained in:
parent
3fa96e6678
commit
03f28475f8
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=81259
@ -27,7 +27,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 13, 1999
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.Dd August 7, 2001
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.Dt SOCKSTAT 1
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.Os
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.Sh NAME
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@ -36,6 +36,7 @@
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.Sh SYNOPSIS
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.Nm
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.Op Fl 46clu
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.Op Fl p Ar ports
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.Sh DESCRIPTION
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The
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.Nm
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@ -51,6 +52,13 @@ Show AF_INET6 (IPv6) sockets.
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Show connected sockets.
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.It Fl l
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Show listening sockets.
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.It Fl p Ar ports
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Only show Internet sockets if either the local or foreign port number
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is on the specified list.
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The
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.Ar ports
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argument is a comma-separated list of port numbers and ranges
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specified as first and last port separated by a dash.
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.It Fl u
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Show AF_LOCAL (Unix) sockets.
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.El
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@ -39,6 +39,67 @@ my $unknown = [ "?", "?", "?", "?", "?", "?", "?", "?", "?" ];
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my $inet_fmt = "%-8.8s %-8.8s %5.5s %4.4s %-6.6s %-21.21s %-21.21s\n";
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my $unix_fmt = "%-8.8s %-8.8s %5.5s %4.4s %-6.6s %-43.43s\n";
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my @ranges;
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#
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# Parse a port range specification
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#
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sub parse_port_ranges($) {
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my $spec = shift; # Range spec
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my $range; # Range
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my ($low, $high); # Low/high ends of range
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foreach $range (split(/\s*,\s*/, $spec)) {
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if ($range =~ m/^(\d+)-(\d+)$/) {
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($low, $high) = ($1, $2);
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} elsif ($range =~ m/^-(\d+)$/) {
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($low, $high) = (1, $1);
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} elsif ($range =~ m/^(\d+)-$/) {
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($low, $high) = ($1, 65535);
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} elsif ($range =~ m/^(\d+)$/) {
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$low = $high = $1;
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} else {
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die("invalid range specification: $range\n");
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}
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if ($low < 0 || $low > 65535 || $high < 0 || $high > 65535) {
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die("valid ports numbers are 1-65535 inclusive\n");
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}
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if ($low > $high) {
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$low ^= $high;
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$high ^= $low;
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$low ^= $high;
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}
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push(@ranges, [ $low, $high ]);
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}
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}
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#
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# Check if a port is in an allowed range
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#
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sub check_range($) {
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my $addr = shift; # Address to check
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my $port; # Port number
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my $range; # Range
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if (@ranges == 0) {
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return 1;
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}
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if ($addr !~ m/\.(\d+)$/) {
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return undef;
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}
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$port = $1;
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foreach $range (@ranges) {
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if ($port >= $range->[0] && $port <= $range->[1]) {
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return 1;
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}
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}
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return undef;
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}
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#
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# Gather information about sockets
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#
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@ -108,6 +169,7 @@ sub print_inet($$$) {
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foreach $fsd (@{$fstat{$af}}) {
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next unless defined($fsd->[7]);
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$nsd = $netstat{$fsd->[7]} || $unknown;
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next unless (check_range($nsd->[4]) || check_range($nsd->[5]));
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next if (!$conn && $nsd->[5] ne '*.*');
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next if (!$listen && $nsd->[5] eq '*.*');
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printf($inet_fmt, $fsd->[0], $fsd->[1], $fsd->[2],
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@ -149,14 +211,14 @@ sub print_unix($$) {
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# Print usage message and exit
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#
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sub usage() {
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print(STDERR "Usage: sockstat [-46clu]\n");
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print(STDERR "Usage: sockstat [-46clu] [-p ports]\n");
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exit(1);
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}
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MAIN:{
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my %opts; # Command-line options
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getopts("46clu", \%opts)
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getopts("46clp:u", \%opts)
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or usage();
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gather();
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@ -167,6 +229,9 @@ MAIN:{
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if (!$opts{'c'} && !$opts{'l'}) {
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$opts{'c'} = $opts{'l'} = 1;
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}
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if ($opts{'p'}) {
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parse_port_ranges($opts{'p'});
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}
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if ($opts{'4'}) {
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print_inet("internet", $opts{'c'}, $opts{'l'});
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}
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