mirror of
https://git.proxmox.com/git/pve-common
synced 2025-05-23 10:31:53 +00:00
2d6b3a90db
and explicitly note that those calls are allowed to fail and
are wrapped in eval {} on purpose.
561 lines
15 KiB
Perl
561 lines
15 KiB
Perl
package PVE::Network;
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use strict;
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use warnings;
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use PVE::Tools qw(run_command);
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use PVE::ProcFSTools;
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use PVE::INotify;
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use File::Basename;
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use IO::Socket::IP;
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use POSIX qw(ECONNREFUSED);
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use Net::IP;
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use Socket qw(IPPROTO_IP);
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use constant IFF_UP => 1;
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use constant IFNAMSIZ => 16;
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use constant SIOCGIFFLAGS => 0x8913;
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# host network related utility functions
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our $ipv4_reverse_mask = [
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'0.0.0.0',
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'128.0.0.0',
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'192.0.0.0',
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'224.0.0.0',
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'240.0.0.0',
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'248.0.0.0',
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'252.0.0.0',
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'254.0.0.0',
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'255.0.0.0',
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'255.128.0.0',
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'255.192.0.0',
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'255.224.0.0',
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'255.240.0.0',
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'255.248.0.0',
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'255.252.0.0',
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'255.254.0.0',
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'255.255.0.0',
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'255.255.128.0',
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'255.255.192.0',
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'255.255.224.0',
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'255.255.240.0',
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'255.255.248.0',
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'255.255.252.0',
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'255.255.254.0',
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'255.255.255.0',
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'255.255.255.128',
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'255.255.255.192',
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'255.255.255.224',
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'255.255.255.240',
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'255.255.255.248',
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'255.255.255.252',
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'255.255.255.254',
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'255.255.255.255',
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];
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our $ipv4_mask_hash_localnet = {
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'255.255.0.0' => 16,
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'255.255.128.0' => 17,
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'255.255.192.0' => 18,
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'255.255.224.0' => 19,
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'255.255.240.0' => 20,
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'255.255.248.0' => 21,
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'255.255.252.0' => 22,
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'255.255.254.0' => 23,
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'255.255.255.0' => 24,
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'255.255.255.128' => 25,
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'255.255.255.192' => 26,
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'255.255.255.224' => 27,
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'255.255.255.240' => 28,
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'255.255.255.248' => 29,
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'255.255.255.252' => 30,
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};
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sub setup_tc_rate_limit {
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my ($iface, $rate, $burst, $debug) = @_;
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# these are allowed / expected to fail, e.g. when there is no previous rate limit to remove
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eval { run_command("/sbin/tc class del dev $iface parent 1: classid 1:1 >/dev/null 2>&1"); };
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eval { run_command("/sbin/tc filter del dev $iface parent ffff: protocol all pref 50 u32 >/dev/null 2>&1"); };
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eval { run_command("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1"); };
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eval { run_command("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1"); };
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return if !$rate;
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# tbf does not work for unknown reason
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#$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST
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# so we use htb instead
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run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1");
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run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " .
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"htb rate ${rate}bps burst ${burst}b");
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run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress");
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run_command("/sbin/tc filter add dev $iface parent ffff: " .
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"prio 50 basic " .
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"police rate ${rate}bps burst ${burst}b mtu 64kb " .
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"drop flowid :1");
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if ($debug) {
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print "DEBUG tc settings\n";
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system("/sbin/tc qdisc ls dev $iface");
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system("/sbin/tc class ls dev $iface");
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system("/sbin/tc filter ls dev $iface parent ffff:");
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}
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}
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sub tap_rate_limit {
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my ($iface, $rate) = @_;
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my $debug = 0;
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$rate = int($rate*1024*1024) if $rate;
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my $burst = 1024*1024;
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setup_tc_rate_limit($iface, $rate, $burst, $debug);
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}
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my $read_bridge_mtu = sub {
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my ($bridge) = @_;
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my $mtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu");
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die "bridge '$bridge' does not exist\n" if !$mtu;
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# avoid insecure dependency;
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die "unable to parse mtu value" if $mtu !~ /^(\d+)$/;
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$mtu = int($1);
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return $mtu;
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};
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my $parse_tap_device_name = sub {
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my ($iface, $noerr) = @_;
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my ($vmid, $devid);
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if ($iface =~ m/^tap(\d+)i(\d+)$/) {
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$vmid = $1;
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$devid = $2;
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} elsif ($iface =~ m/^veth(\d+)i(\d+)$/) {
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$vmid = $1;
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$devid = $2;
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} else {
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return undef if $noerr;
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die "can't create firewall bridge for random interface name '$iface'\n";
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}
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return ($vmid, $devid);
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};
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my $compute_fwbr_names = sub {
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my ($vmid, $devid) = @_;
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my $fwbr = "fwbr${vmid}i${devid}";
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# Note: the firewall use 'fwln+' to filter traffic to VMs
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my $vethfw = "fwln${vmid}i${devid}";
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my $vethfwpeer = "fwpr${vmid}p${devid}";
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my $ovsintport = "fwln${vmid}o${devid}";
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return ($fwbr, $vethfw, $vethfwpeer, $ovsintport);
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};
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my $cond_create_bridge = sub {
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my ($bridge) = @_;
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if (! -d "/sys/class/net/$bridge") {
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system("/sbin/brctl addbr $bridge") == 0 ||
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die "can't add bridge '$bridge'\n";
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}
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};
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my $bridge_add_interface = sub {
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my ($bridge, $iface, $tag, $trunks) = @_;
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system("/sbin/brctl addif $bridge $iface") == 0 ||
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die "can't add interface 'iface' to bridge '$bridge'\n";
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my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering");
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if ($vlan_aware) {
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if ($tag) {
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system("/sbin/bridge vlan add dev $iface vid $tag pvid untagged") == 0 ||
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die "unable to add vlan $tag to interface $iface\n";
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} else {
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system("/sbin/bridge vlan add dev $iface vid 2-4094") == 0 ||
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die "unable to add default vlan tags to interface $iface\n" if !$trunks;
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}
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if ($trunks) {
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my @trunks_array = split /;/, $trunks;
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foreach my $trunk (@trunks_array) {
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system("/sbin/bridge vlan add dev $iface vid $trunk") == 0 ||
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die "unable to add vlan $trunk to interface $iface\n";
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}
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}
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}
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};
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my $ovs_bridge_add_port = sub {
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my ($bridge, $iface, $tag, $internal, $trunks) = @_;
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$trunks =~ s/;/,/g if $trunks;
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my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface";
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$cmd .= " tag=$tag" if $tag;
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$cmd .= " trunks=". join(',', $trunks) if $trunks;
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$cmd .= " vlan_mode=native-untagged" if $tag && $trunks;
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$cmd .= " -- set Interface $iface type=internal" if $internal;
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system($cmd) == 0 ||
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die "can't add ovs port '$iface'\n";
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};
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my $activate_interface = sub {
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my ($iface) = @_;
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system("/sbin/ip link set $iface up") == 0 ||
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die "can't activate interface '$iface'\n";
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};
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sub tap_create {
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my ($iface, $bridge) = @_;
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die "unable to get bridge setting\n" if !$bridge;
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my $bridgemtu = &$read_bridge_mtu($bridge);
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eval {
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PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu");
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};
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die "interface activation failed\n" if $@;
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}
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sub veth_create {
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my ($veth, $vethpeer, $bridge, $mac) = @_;
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die "unable to get bridge setting\n" if !$bridge;
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my $bridgemtu = &$read_bridge_mtu($bridge);
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# create veth pair
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if (! -d "/sys/class/net/$veth") {
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my $cmd = "/sbin/ip link add name $veth type veth peer name $vethpeer mtu $bridgemtu";
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$cmd .= " addr $mac" if $mac;
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system($cmd) == 0 || die "can't create interface $veth\n";
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}
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# up vethpair
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&$activate_interface($veth);
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&$activate_interface($vethpeer);
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}
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sub veth_delete {
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my ($veth) = @_;
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if (-d "/sys/class/net/$veth") {
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run_command("/sbin/ip link delete dev $veth", outfunc => sub {}, errfunc => sub {});
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}
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}
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my $create_firewall_bridge_linux = sub {
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my ($iface, $bridge, $tag, $trunks) = @_;
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my ($vmid, $devid) = &$parse_tap_device_name($iface);
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my ($fwbr, $vethfw, $vethfwpeer) = &$compute_fwbr_names($vmid, $devid);
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&$cond_create_bridge($fwbr);
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&$activate_interface($fwbr);
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copy_bridge_config($bridge, $fwbr);
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veth_create($vethfw, $vethfwpeer, $bridge);
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&$bridge_add_interface($fwbr, $vethfw);
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&$bridge_add_interface($bridge, $vethfwpeer, $tag, $trunks);
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&$bridge_add_interface($fwbr, $iface);
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};
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my $create_firewall_bridge_ovs = sub {
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my ($iface, $bridge, $tag, $trunks) = @_;
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my ($vmid, $devid) = &$parse_tap_device_name($iface);
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my ($fwbr, undef, undef, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
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my $bridgemtu = &$read_bridge_mtu($bridge);
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&$cond_create_bridge($fwbr);
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&$activate_interface($fwbr);
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&$bridge_add_interface($fwbr, $iface);
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&$ovs_bridge_add_port($bridge, $ovsintport, $tag, 1, $trunks);
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&$activate_interface($ovsintport);
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# set the same mtu for ovs int port
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PVE::Tools::run_command("/sbin/ifconfig $ovsintport mtu $bridgemtu");
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&$bridge_add_interface($fwbr, $ovsintport);
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};
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my $cleanup_firewall_bridge = sub {
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my ($iface) = @_;
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my ($vmid, $devid) = &$parse_tap_device_name($iface, 1);
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return if !defined($vmid);
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my ($fwbr, $vethfw, $vethfwpeer, $ovsintport) = &$compute_fwbr_names($vmid, $devid);
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# cleanup old port config from any openvswitch bridge
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if (-d "/sys/class/net/$ovsintport") {
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run_command("/usr/bin/ovs-vsctl del-port $ovsintport", outfunc => sub {}, errfunc => sub {});
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}
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# delete old vethfw interface
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veth_delete($vethfw);
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# cleanup fwbr bridge
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if (-d "/sys/class/net/$fwbr") {
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run_command("/sbin/ip link set dev $fwbr down", outfunc => sub {}, errfunc => sub {});
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run_command("/sbin/brctl delbr $fwbr", outfunc => sub {}, errfunc => sub {});
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}
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};
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sub tap_plug {
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my ($iface, $bridge, $tag, $firewall, $trunks, $rate) = @_;
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#cleanup old port config from any openvswitch bridge
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eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) };
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if (-d "/sys/class/net/$bridge/bridge") {
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&$cleanup_firewall_bridge($iface); # remove stale devices
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my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering");
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if (!$vlan_aware) {
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die "vlan aware feature need to be enabled to use trunks" if $trunks;
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my $newbridge = activate_bridge_vlan($bridge, $tag);
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copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge;
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$bridge = $newbridge;
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$tag = undef;
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}
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if ($firewall) {
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&$create_firewall_bridge_linux($iface, $bridge, $tag, $trunks);
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} else {
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&$bridge_add_interface($bridge, $iface, $tag, $trunks);
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}
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} else {
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&$cleanup_firewall_bridge($iface); # remove stale devices
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if ($firewall) {
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&$create_firewall_bridge_ovs($iface, $bridge, $tag, $trunks);
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} else {
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&$ovs_bridge_add_port($bridge, $iface, $tag, undef, $trunks);
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}
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}
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tap_rate_limit($iface, $rate);
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}
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sub tap_unplug {
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my ($iface) = @_;
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my $path= "/sys/class/net/$iface/brport/bridge";
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if (-l $path) {
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my $bridge = basename(readlink($path));
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#avoid insecure dependency;
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($bridge) = $bridge =~ /(\S+)/;
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system("/sbin/brctl delif $bridge $iface") == 0 ||
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die "can't del interface '$iface' from bridge '$bridge'\n";
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}
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&$cleanup_firewall_bridge($iface);
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#cleanup old port config from any openvswitch bridge
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eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) };
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}
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sub copy_bridge_config {
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my ($br0, $br1) = @_;
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return if $br0 eq $br1;
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my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay',
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'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier'];
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foreach my $sysname (@$br_configs) {
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eval {
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my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname");
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my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname");
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if ($v0 ne $v1) {
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PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0);
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}
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};
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warn $@ if $@;
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}
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}
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sub activate_bridge_vlan_slave {
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my ($bridgevlan, $iface, $tag) = @_;
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my $ifacevlan = "${iface}.$tag";
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# create vlan on $iface is not already exist
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if (! -d "/sys/class/net/$ifacevlan") {
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system("/sbin/ip link add link $iface name ${iface}.${tag} type vlan id $tag") == 0 ||
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die "can't add vlan tag $tag to interface $iface\n";
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}
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# be sure to have the $ifacevlan up
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&$activate_interface($ifacevlan);
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# test if $vlaniface is already enslaved in another bridge
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my $path= "/sys/class/net/$ifacevlan/brport/bridge";
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if (-l $path) {
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my $tbridge = basename(readlink($path));
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if ($tbridge ne $bridgevlan) {
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die "interface $ifacevlan already exist in bridge $tbridge\n";
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} else {
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# Port already attached to bridge: do nothing.
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return;
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}
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}
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# add $ifacevlan to the bridge
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&$bridge_add_interface($bridgevlan, $ifacevlan);
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}
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sub activate_bridge_vlan {
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my ($bridge, $tag_param) = @_;
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die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge";
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return $bridge if !defined($tag_param); # no vlan, simply return
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my $tag = int($tag_param);
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die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094;
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my $bridgevlan = "${bridge}v$tag";
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my @ifaces = ();
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my $dir = "/sys/class/net/$bridge/brif";
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PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+(\.\d+)?)', sub {
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push @ifaces, $_[0];
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});
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die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0;
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# add bridgevlan if it doesn't already exist
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if (! -d "/sys/class/net/$bridgevlan") {
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system("/sbin/brctl addbr $bridgevlan") == 0 ||
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die "can't add bridge $bridgevlan\n";
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}
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# for each physical interface (eth or bridge) bind them to bridge vlan
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foreach my $iface (@ifaces) {
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activate_bridge_vlan_slave($bridgevlan, $iface, $tag);
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}
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#fixme: set other bridge flags
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# be sure to have the bridge up
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system("/sbin/ip link set $bridgevlan up") == 0 ||
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die "can't up bridge $bridgevlan\n";
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return $bridgevlan;
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}
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sub tcp_ping {
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my ($host, $port, $timeout) = @_;
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my $refused = 1;
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$timeout = 3 if !$timeout; # sane default
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if (!$port) {
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# Net::Ping defaults to the echo port
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$port = 7;
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} else {
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# Net::Ping's port_number() implies service_check(1)
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$refused = 0;
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}
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|
|
|
my ($sock, $result);
|
|
eval {
|
|
$result = PVE::Tools::run_with_timeout($timeout, sub {
|
|
$sock = IO::Socket::IP->new(PeerHost => $host, PeerPort => $port, Type => SOCK_STREAM);
|
|
$result = $refused if $! == ECONNREFUSED;
|
|
});
|
|
};
|
|
if ($sock) {
|
|
$sock->close();
|
|
$result = 1;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
sub IP_from_cidr {
|
|
my ($cidr, $version) = @_;
|
|
|
|
return if $cidr !~ m!^(\S+?)/(\S+)$!;
|
|
my ($ip, $prefix) = ($1, $2);
|
|
|
|
my $ipobj = Net::IP->new($ip, $version);
|
|
return if !$ipobj;
|
|
|
|
$version = $ipobj->version();
|
|
|
|
my $binmask = Net::IP::ip_get_mask($prefix, $version);
|
|
return if !$binmask;
|
|
|
|
my $masked_binip = $ipobj->binip() & $binmask;
|
|
my $masked_ip = Net::IP::ip_bintoip($masked_binip, $version);
|
|
return Net::IP->new("$masked_ip/$prefix");
|
|
}
|
|
|
|
sub is_ip_in_cidr {
|
|
my ($ip, $cidr, $version) = @_;
|
|
|
|
my $cidr_obj = IP_from_cidr($cidr, $version);
|
|
return undef if !$cidr_obj;
|
|
|
|
my $ip_obj = Net::IP->new($ip, $version);
|
|
return undef if !$ip_obj;
|
|
|
|
return $cidr_obj->overlaps($ip_obj) == $Net::IP::IP_B_IN_A_OVERLAP;
|
|
}
|
|
|
|
# struct ifreq { // FOR SIOCGIFFLAGS:
|
|
# char ifrn_name[IFNAMSIZ]
|
|
# short ifru_flags
|
|
# };
|
|
my $STRUCT_IFREQ_SIOCGIFFLAGS = 'Z' . IFNAMSIZ . 's1';
|
|
sub get_active_interfaces {
|
|
# Use the interface name list from /proc/net/dev
|
|
open my $fh, '<', '/proc/net/dev'
|
|
or die "failed to open /proc/net/dev: $!\n";
|
|
# And filter by IFF_UP flag fetched via a PF_INET6 socket ioctl:
|
|
my $sock;
|
|
socket($sock, PF_INET6, SOCK_DGRAM, &IPPROTO_IP)
|
|
or socket($sock, PF_INET, SOCK_DGRAM, &IPPROTO_IP)
|
|
or return [];
|
|
|
|
my $ifaces = [];
|
|
while(defined(my $line = <$fh>)) {
|
|
next if $line !~ /^\s*([^:\s]+):/;
|
|
my $ifname = $1;
|
|
my $ifreq = pack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifname, 0);
|
|
if (!defined(ioctl($sock, SIOCGIFFLAGS, $ifreq))) {
|
|
warn "failed to get interface flags for: $ifname\n";
|
|
next;
|
|
}
|
|
my ($name, $flags) = unpack($STRUCT_IFREQ_SIOCGIFFLAGS, $ifreq);
|
|
push @$ifaces, $ifname if ($flags & IFF_UP);
|
|
}
|
|
close $fh;
|
|
close $sock;
|
|
return $ifaces;
|
|
}
|
|
|
|
1;
|