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vyatta-interfaces.pl
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vyatta-interfaces.pl
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#!/usr/bin/perl
#
# Module: vyatta-interfaces.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.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licenses/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at `http://www.gnu.org/copyleft/gpl.html'.
# You can also obtain it by writing to the Free Software Foundation,
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Stig Thormodsrud
# Date: November 2007
# Description: Script to assign addresses to interfaces.
#
# **** End License ****
#
use lib "/opt/vyatta/share/perl5/";
use Vyatta::Config;
use Vyatta::Misc qw(generate_dhclient_intf_files
getInterfaces getIP get_sysfs_value
is_address_enabled is_dhcp_enabled is_ip_v4_or_v6);
use Vyatta::File qw(touch);
use Vyatta::Interface;
use Getopt::Long;
use strict;
use warnings;
my $dhcp_daemon = '/sbin/dhclient';
my $ETHTOOL = '/sbin/ethtool';
my ($dev, $mac, $mac_update);
my %skip_interface;
my ($check_name, $show_names, $vif_name, $warn_name);
my ($check_up, $dhcp_command, $allowed_speed);
my (@speed_duplex, @addr_commit, @check_speed, @offload_option);
sub usage {
print <<EOF;
Usage: $0 --dev=<interface> --check=<type>
$0 --dev=<interface> --warn
$0 --dev=<interface> --valid-mac=<aa:aa:aa:aa:aa:aa>
$0 --dev=<interface> --valid-addr-commit={addr1 addr2 ...}
$0 --dev=<interface> --speed-duplex=speed,duplex
$0 --dev=<interface> --check-speed=speed,duplex
$0 --dev=<interface> --allowed-speed
$0 --dev=<interface> --isup
$0 --dev=<interface> --offload-option={tcp-segmention,udp-fragmentation} {value}
$0 --dev=<interface> --offload-option={generic-segmentation,generic-receive} {value}
$0 --dev=<interface> --offload-option={scatter-gather} {value}
$0 --show=<type>
EOF
exit 1;
}
GetOptions(
"valid-addr-commit=s{,}" => \@addr_commit,
"dev=s" => \$dev,
"valid-mac=s" => \$mac,
"set-mac=s" => \$mac_update,
"dhcp=s" => \$dhcp_command,
"check=s" => \$check_name,
"show=s" => \$show_names,
"skip=s" => sub {$skip_interface{$_[1]} = 1},
"vif=s" => \$vif_name,
"warn" => \$warn_name,
"isup" => \$check_up,
"speed-duplex=s{2}" => \@speed_duplex,
"check-speed=s{2}" => \@check_speed,
"allowed-speed" => \$allowed_speed,
"offload-option=s{2}" => \@offload_option,
) or usage();
is_valid_addr_commit($dev, @addr_commit) if (@addr_commit);
is_valid_mac($mac, $dev) if ($mac);
update_mac($mac_update, $dev) if ($mac_update);
dhcp($dhcp_command, $dev) if ($dhcp_command);
is_valid_name($check_name, $dev) if ($check_name);
exists_name($dev) if ($warn_name);
show_interfaces($show_names) if ($show_names);
is_up($dev) if ($check_up);
set_speed_duplex($dev, @speed_duplex) if (@speed_duplex);
check_speed_duplex($dev, @check_speed) if (@check_speed);
allowed_speed($dev) if ($allowed_speed);
set_offload_option($dev, @offload_option) if (@offload_option);
exit 0;
sub is_ip_configured {
my ($intf, $ip) = @_;
my $found = grep {$_ eq $ip} Vyatta::Misc::getIP($intf);
return ($found > 0);
}
sub is_ipv4 {
return index($_[0],':') < 0;
}
sub is_up {
my $name = shift;
my $intf = new Vyatta::Interface($name);
die "Unknown interface type for $name" unless $intf;
exit 0 if ($intf->up());
exit 1;
}
sub dhcp_write_file {
my ($file, $data) = @_;
open(my $fh, '>', $file) || die "Couldn't open $file - $!";
print $fh $data;
close $fh;
}
sub dhcp_conf_header {
my $output;
my $date = `date`;
chomp $date;
$output = "#\n# autogenerated by vyatta-interfaces.pl on $date\n#\n";
return $output;
}
sub get_hostname {
my $config = new Vyatta::Config;
$config->setLevel("system");
return $config->returnValue("host-name");
}
sub is_domain_name_set {
my $config = new Vyatta::Config;
$config->setLevel("system");
return $config->returnValue("domain-name");
}
sub get_mtu {
my $name = shift;
my $intf = new Vyatta::Interface($name);
return $intf->mtu();
}
sub dhcp_update_config {
my ($conf_file, $intf) = @_;
my $output = dhcp_conf_header();
my $hostname = get_hostname();
$output .= "interface \"$intf\" {\n";
if (defined($hostname)) {
$output .= "\tsend host-name \"$hostname\";\n";
}
$output .= "\trequest subnet-mask, broadcast-address, routers, domain-name-servers";
my $domainname = is_domain_name_set();
if (!defined($domainname)) {
$output .= ", domain-name";
}
my $mtu = get_mtu($intf);
$output .= ", interface-mtu" unless $mtu;
$output .= ";\n";
$output .= "}\n\n";
dhcp_write_file($conf_file, $output);
}
# Is interface disabled in configuration (only valid in config mode)
sub is_intf_disabled {
my $name = shift;
my $intf = new Vyatta::Interface($name);
$intf or die "Unknown interface name/type: $name\n";
my $config = new Vyatta::Config;
$config->setLevel($intf->path());
return $config->exists("disable");
}
sub run_dhclient {
my ($intf, $op_mode) = @_;
my ($intf_config_file, $intf_process_id_file, $intf_leases_file)= generate_dhclient_intf_files($intf);
# perform config mode actions if not called from op-mode
if (!defined $op_mode) {
dhcp_update_config($intf_config_file, $intf);
return if is_intf_disabled($intf);
}
my $cmd = "$dhcp_daemon -pf $intf_process_id_file -x $intf 2> /dev/null; rm -f $intf_process_id_file 2> /dev/null;";
$cmd .= "$dhcp_daemon -q -nw -cf $intf_config_file -pf $intf_process_id_file -lf $intf_leases_file $intf 2> /dev/null &";
# adding & at the end to make the process into a daemon immediately
system($cmd) == 0
or warn "start $dhcp_daemon failed: $?\n";
}
sub stop_dhclient {
my ($intf, $op_mode) = @_;
# perform config mode actions if not called from op-mode
if (!defined $op_mode) {
return if is_intf_disabled($intf);
}
my ($intf_config_file, $intf_process_id_file, $intf_leases_file)= generate_dhclient_intf_files($intf);
my $release_cmd = "$dhcp_daemon -q -cf $intf_config_file -pf $intf_process_id_file -lf $intf_leases_file -r $intf 2> /dev/null;";
$release_cmd .= "rm -f $intf_process_id_file 2> /dev/null";
system($release_cmd) == 0
or warn "stop $dhcp_daemon failed: $?\n";
}
sub update_mac {
my ($mac, $name) = @_;
my $intf = new Vyatta::Interface($name);
$intf or die "Unknown interface name/type: $name\n";
# maybe nothing needs to change
my $oldmac = $intf->hw_address();
exit 0 if (lc($oldmac) eq lc($mac));
# try the direct approach
if (system("sudo ip link set $name address $mac") == 0) {
exit 0;
} elsif ($intf->up()) {
# some hardware can not change MAC address if up
system "sudo ip link set $name down"
and die "Could not set $name down\n";
system "sudo ip link set $name address $mac"
and die "Could not set $name address\n";
system "sudo ip link set $name up"
and die "Could not set $name up\n";
} else {
die "Could not set mac address for $name\n";
}
exit 0;
}
sub is_vrrp_mac {
my @octets = @_;
return 1 if ( hex($octets[0]) == 0
&& hex($octets[1]) == 0
&& hex($octets[2]) == 94
&& hex($octets[3]) == 0
&& hex($octets[4]) == 1);
return 0;
}
sub is_valid_mac {
my ($mac, $intf) = @_;
my @octets = split /:/, $mac;
($#octets == 5) or die "Error: wrong number of octets: $#octets\n";
((hex($octets[0]) & 1) == 0) or die "Error: $mac is a multicast address\n";
is_vrrp_mac(@octets) and die "Error: $mac is a vrrp mac address\n";
my $sum = 0;
$sum += hex($_) foreach @octets;
($sum != 0) or die "Error: zero is not a valid address\n";
exit 0;
}
# Validate the set of address values configured on an interface at commit
# Check that full set of address address values are consistent.
# 1. Interface may not be part of bridge or bonding group
# 2. Can not have both DHCP and a static IPv4 address.
sub is_valid_addr_commit {
my ($ifname, @addrs) = @_;
my $intf = new Vyatta::Interface($ifname);
$intf or die "Unknown interface name/type: $ifname\n";
my $config = new Vyatta::Config;
$config->setLevel($intf->path());
my $bridge = $config->returnValue("bridge-group bridge");
die "Can't configure address on interface that is port of bridge.\n"
if (defined($bridge));
my $bond = $config->returnValue("bond-group");
die "Can't configure address on interface that is slaved to bonding interface.\n"
if (defined($bond));
my $addrmap = Vyatta::Interface::get_cfg_addresses();
my ($dhcp, $static_v4);
foreach my $addr (@addrs) {
next if ($addr eq 'dhcpv6');
if ($addr eq 'dhcp') {
$dhcp = 1;
next;
}
$static_v4 = 1
if (is_ipv4($addr));
}
die "Can't configure static IPv4 address and DHCP on the same interface.\n"
if ($static_v4 && $dhcp);
exit 0;
}
# Is interface currently in admin down state?
sub is_intf_down {
my $name = shift;
my $intf = new Vyatta::Interface($name);
return 1 unless $intf;
return !$intf->up();
}
sub dhcp {
my ($request, $intf) = @_;
die "$intf is not using DHCP to get an IP address\n"
unless ($request eq 'start' || is_dhcp_enabled($intf));
die "$intf is disabled.\n"
if ($request ne 'stop' && is_intf_down($intf));
my $tmp_dhclient_dir = '/var/run/vyatta/dhclient/';
my $release_file = $tmp_dhclient_dir . 'dhclient_release_' . $intf;
if ($request eq "release") {
die "IP address for $intf has already been released.\n"
if (-e $release_file);
print "Releasing DHCP lease on $intf ...\n";
stop_dhclient($intf, 'op_mode');
mkdir($tmp_dhclient_dir) if (!-d $tmp_dhclient_dir);
touch($release_file);
} elsif ($request eq "renew") {
print "Renewing DHCP lease on $intf ...\n";
run_dhclient($intf, 'op_mode');
unlink($release_file);
} elsif ($request eq "start") {
print "Starting DHCP client on $intf ...\n";
touch("/var/lib/dhcp/$intf");
run_dhclient($intf);
} elsif ($request eq "stop") {
print "Stopping DHCP client on $intf ...\n";
stop_dhclient($intf);
unlink("/var/lib/dhcp/dhclient_$intf\_lease");
unlink("/var/lib/dhcp/$intf");
unlink("/var/run/vyatta/dhclient/dhclient_release_$intf");
unlink("/var/lib/dhcp/dhclient_$intf\.conf");
} else {
die "Unknown DHCP request: $request\n";
}
exit 0;
}
sub is_valid_name {
my ($type, $name) = @_;
die "Missing --dev argument\n" unless $name;
my $intf = new Vyatta::Interface($name);
die "$name does not match any known interface name type\n"
unless $intf;
my $vif = $intf->vif();
die "$name is the name of VIF interface\n","Need to use \"interface ",$intf->physicalDevice()," vif $vif\"\n"
if $vif;
die "$name is a ", $intf->type(), " interface not an $type interface\n"
if ($type ne 'all' and $intf->type() ne $type);
die "$type interface $name does not exist on system\n"
unless grep {$name eq $_} getInterfaces();
exit 0;
}
sub exists_name {
my $name = shift;
die "Missing --dev argument\n" unless $name;
warn "interface $name does not exist on system\n"
unless grep {$name eq $_} getInterfaces();
exit 0;
}
# generate one line with all known interfaces (for allowed)
sub show_interfaces {
my $type = shift;
my @interfaces = getInterfaces();
my @match;
foreach my $name (@interfaces) {
my $intf = new Vyatta::Interface($name);
next unless $intf; # skip unknown types
next if $skip_interface{$name};
next unless ($type eq 'all' || $type eq $intf->type());
if ($intf->vrid()){
push @match, $name; # add all vrrp interfaces
} elsif ($vif_name) {
next unless $intf->vif();
push @match, $intf->vif()
if ($vif_name eq $intf->physicalDevice());
} else {
push @match, $name
unless $intf->vif()
and $type ne 'all';
}
}
print join(' ', @match), "\n";
}
# Determine current values for autoneg, speed, duplex
sub get_ethtool {
my $dev = shift;
open(my $ethtool, '-|', "$ETHTOOL $dev 2>&1")
or die "ethtool failed: $!\n";
# ethtool produces:
#
# Settings for eth1:
# Supported ports: [ TP ]
# ...
# Speed: 1000Mb/s
# Duplex: Full
# ...
# Auto-negotiation: on
my ($rate, $duplex) = (1000, "full");
my $autoneg = 0;
while (<$ethtool>) {
chomp;
return if (/^Cannot get device settings/);
if (/^\s+Speed: (\d+)Mb/) {
$rate = $1;
} elsif (/^\s+Duplex:\s(.*)$/) {
$duplex = lc $1;
} elsif (/^\s+Auto-negotiation: on/) {
$autoneg = 1;
}
}
close $ethtool;
$duplex = "full" if $duplex =~ /unknown.*/;
return ($autoneg, $rate, $duplex);
}
sub set_speed_duplex {
my ($intf, $nspeed, $nduplex) = @_;
die "Missing --dev argument\n" unless $intf;
## if driver virtio, speed and duplex are unknown per default coming fromthe driver itself
## if that's the case we always run ethtool and set the values
open(my $ethtool, '-|', "$ETHTOOL -i $dev 2>&1")
or die "ethtool failed: $!\n";
my $drv = 0;
while (<$ethtool>)
{
chomp;
return if (/^Cannot get device driver settings/);
$drv = 1 if (/^driver:.*/);
last;
}
if ($drv != 1)
{
# read old values to avoid meaningless speed changes
my ($autoneg, $ospeed, $oduplex) = get_ethtool($intf);
if (defined($autoneg) && $autoneg == 1) {
# Device is already in autonegotiation mode
return if ($nspeed eq 'auto');
} elsif (defined($ospeed) && defined($oduplex)) {
# Device has explicit speed/duplex but they already match
return if (($nspeed eq $ospeed) && ($nduplex eq $oduplex));
}
}
my $cmd = "$ETHTOOL -s $intf";
if ($nspeed eq 'auto') {
$cmd .= " autoneg on";
} else {
$cmd .= " speed $nspeed duplex $nduplex autoneg off";
}
exec $cmd;
die "exec of $ETHTOOL failed: $!";
}
# Check if speed and duplex value is supported by device
sub is_supported_speed {
my ($dev, $speed, $duplex) = @_;
open(my $if_drv, '-|', "$ETHTOOL -i $dev 2>/dev/null")
or die "ethtool -i failed: $!\n";
### check if virtualized NIC
return 1 if <$if_drv> =~ /virtio_net/;
my $wanted = sprintf("%dbase%s/%s", $speed,($speed == 2500) ? 'X' : 'T', ucfirst($duplex));
open(my $ethtool, '-|', "$ETHTOOL $dev 2>/dev/null")
or die "ethtool failed: $!\n";
# ethtool output:
#
# Settings for eth1:
# Supported ports: [ TP ]
# Supported link modes: 10baseT/Half 10baseT/Full
# 100baseT/Half 100baseT/Full
# 1000baseT/Half 1000baseT/Full
# Supports auto-negotiation: Yes
my $mode;
while (<$ethtool>) {
chomp;
if ($mode) {
last unless /^\t /;
} else {
next unless /^\tSupported link modes: /;
$mode = 1;
}
return 1 if /$wanted/;
}
close $ethtool;
return;
}
# Validate speed and duplex settings prior to commit
sub check_speed_duplex {
my ($dev, $speed, $duplex) = @_;
# most basic and default case
exit 0 if ($speed eq 'auto' && $duplex eq 'auto');
die "If speed is hardcoded, duplex must also be hardcoded\n"
if ($duplex eq 'auto');
die "If duplex is hardcoded, speed must also be hardcoded\n"
if ($speed eq 'auto');
die "Speed $speed, duplex $duplex not supported on $dev\n"
unless is_supported_speed($dev, $speed, $duplex);
exit 0;
}
# Produce list of valid speed values for device
sub allowed_speed {
my ($dev) = @_;
open(my $ethtool, '-|', "$ETHTOOL $dev 2>/dev/null")
or die "ethtool failed: $!\n";
my %speeds;
my $first = 1;
while (<$ethtool>) {
chomp;
if ($first) {
next unless s/\tSupported link modes:\s//;
$first = 0;
} else {
last unless /^\t /;
}
foreach my $val (split / /) {
$speeds{$1} = 1 if $val =~ /(\d+)base/;
}
}
close $ethtool;
print 'auto ', join(' ', sort keys %speeds), "\n";
}
sub get_offload_option {
my ($dev, $option) = @_;
my $val;
my $ethtool_option;
if ($option ne 'scatter-gather') {
$ethtool_option = "$option-offload";
} else {
$ethtool_option = $option;
}
open(my $ethtool, '-|', "$ETHTOOL -k $dev 2>&1") or die "ethtool failed: $!\n";
while (<$ethtool>) {
next if ($_ !~ m/$ethtool_option:/);
chomp;
$val = (split(/: /, $_))[1];
}
close $ethtool;
return $val;
}
sub set_offload_option {
my ($intf, $option, $nvalue) = @_;
die "Missing --dev argument\n" unless $intf;
my $ovalue = get_offload_option($intf, $option);
my %ethtool_opts = (
'generic-receive' => 'gro',
'generic-segmentation' => 'gso',
'tcp-segmentation' => 'tso',
'udp-fragmentation' => 'ufo',
'scatter-gather' => 'sg',
);
if (defined($nvalue) && $nvalue ne $ovalue) {
my $cmd = "$ETHTOOL -K $intf $ethtool_opts{$option} $nvalue";
system($cmd);
if ($? >> 8) {
die "Offload option for $option is not supported on $intf\n";
}
}
}