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#!/usr/bin/perl
#
# Module: show-input-policy.pl
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Copyright (C) 2010 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Stephen Hemminger
# Description: Script to display input filter information in pretty form
#
# **** End License ****
#
use strict;
use warnings;
use Getopt::Long;
use lib "/opt/vyatta/share/perl5/";
use Vyatta::Interface;
use Vyatta::Misc;
my $INGRESS = 0xffff;
sub ingress_interface {
my @interfaces;
# Read base qdisc list to find ingress
open( my $tc, '-|', '/sbin/tc qdisc ls' )
or die 'tc qdisc command failed';
while (<$tc>) {
chomp;
# qdisc ingress ffff: dev eth0 parent ffff:fff1 -------------------
my (undef, $qdisc, undef, undef, $dev) = split;
next unless ($qdisc eq 'ingress');
push @interfaces, $dev;
}
close $tc;
return @interfaces;
}
sub qminor {
my $id = shift;
return hex($1) if ( $id =~ /:(.*)$/ );
}
# expects
# filter protocol all pref 20 basic ... flowid ffff:2 ...
# returns "ffff:2"
sub get_flow {
return unless $#_ > 6;
for (my $i = 5; $i < $#_; $i++) {
return $_[$i + 1] if ($_[$i] eq 'flowid');
}
return;
}
sub get_filter {
my ($interface) = @_;
open( my $tc, '-|',
"/sbin/tc -s filter show dev $interface parent ffff:" )
or die 'tc filter command failed: $!';
my ($id, $rate, $action, $sent, $drop, $over);
my %filters;
while (<$tc>) {
chomp;
/^filter/ && do {
# filter protocol all pref 20 u32
# filter protocol all pref 20 u32 fh 800: ht divisor 1
# filter protocol all pref 20 u32 fh 800::800 order 2048 ... flowid ffff:2
my @filter = split;
my $flow = get_flow(@filter);
next unless $flow;
$filters{$id} = [ $action, $sent, $drop, $over, $rate ] if $id;
$id = qminor($flow);
# workaround lack of stats for some filters
$sent = 0;
$drop = 0;
$over = 0;
};
/^\s+police/ && do {
# police 0x3 rate 80000Kbit burst 16Kb
(undef, undef, undef, $rate) = split;
$rate =~ s/bit$//;
$action = 'limit';
};
/^\s+action/ && do {
# action order 1: mirred (Egress Redirect to device ifb0) stolen
my (undef, undef, undef, undef, undef, $a) = split;
$action = lc($a);
};
/^\s+Sent/ && do {
# Sent 960 bytes 88 pkts (dropped 0, overlimits 0)
( undef, $sent, undef, undef, undef, undef, $drop, undef, $over ) = split;
$drop =~ s/,$//;
$over =~ s/\)$//;
};
}
$filters{$id} = [ $action, $sent, $drop, $over, $rate ] if $id;
return \%filters;
}
sub show {
my $interface = shift;
my $filters = get_filter($interface);
my @classes = keys %{$filters};
return if $#classes < 0; # no ingress
print "\n$interface input:\n";
my $fmt = "%-10s %-10s %-10s %-9s %-9s %s\n";
printf $fmt, 'Class', 'Action', 'Received', 'Dropped', 'Overlimit', 'Rate';
foreach my $id (sort @classes) {
my @args = @{$filters->{$id}};
my $class = ($id eq $INGRESS) ? 'default' : $id;
my $rate = pop @args;
$rate = '-' unless defined($rate);
printf $fmt, $class, @args, $rate;
}
}
sub show_brief {
my @interfaces = ingress_interface();
my $fmt = "%-10s %-10s %-10s %-9s %-9s\n";
printf $fmt, 'Interface', 'Action', 'Received', 'Dropped', 'Overlimit';
foreach my $intf (sort @interfaces) {
my $filters = get_filter($intf);
my $action = "none";
my $receive = 0;
my $dropped = 0;
my $overlimit = 0;
foreach my $id (keys %{$filters}) {
my @args = @{$filters->{$id}};
$action = $args[0];
$receive += $args[1];
$dropped += $args[2];
$overlimit += $args[3];
}
printf $fmt, $intf, $action, $receive, $dropped, $overlimit;
}
exit 0;
}
sub usage {
print "Usage: $0 [--type={ethernet,serial}] --brief\n";
print " $0 interface(s)\n";
exit 1;
}
my ($intf_type, $brief);
GetOptions(
'type=s' => \$intf_type,
'brief' => \$brief,
) or usage();
show_brief() if $brief;
if ( $#ARGV == -1 ) {
foreach my $ifname ( getInterfaces() ) {
if ($intf_type) {
my $intf = new Vyatta::Interface($ifname);
next unless ( $intf && $intf_type eq $intf->type() );
}
push @ARGV, $ifname;
}
}
foreach my $interface ( sort @ARGV ) {
show($interface);
}
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