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