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Commit | Line | Data |
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b9436cda DM |
1 | package PVE::Network; |
2 | ||
3 | use strict; | |
c36f332e | 4 | use warnings; |
74d1b045 | 5 | use PVE::Tools qw(run_command); |
b9436cda DM |
6 | use PVE::ProcFSTools; |
7 | use PVE::INotify; | |
8 | use File::Basename; | |
b6bff92e WB |
9 | use IO::Socket::IP; |
10 | use POSIX qw(ECONNREFUSED); | |
b9436cda | 11 | |
bf52d27b WB |
12 | use Net::IP; |
13 | ||
b9436cda DM |
14 | # host network related utility functions |
15 | ||
61aa94e4 WB |
16 | our $ipv4_reverse_mask = [ |
17 | '0.0.0.0', | |
18 | '128.0.0.0', | |
19 | '192.0.0.0', | |
20 | '224.0.0.0', | |
21 | '240.0.0.0', | |
22 | '248.0.0.0', | |
23 | '252.0.0.0', | |
24 | '254.0.0.0', | |
25 | '255.0.0.0', | |
26 | '255.128.0.0', | |
27 | '255.192.0.0', | |
28 | '255.224.0.0', | |
29 | '255.240.0.0', | |
30 | '255.248.0.0', | |
31 | '255.252.0.0', | |
32 | '255.254.0.0', | |
33 | '255.255.0.0', | |
34 | '255.255.128.0', | |
35 | '255.255.192.0', | |
36 | '255.255.224.0', | |
37 | '255.255.240.0', | |
38 | '255.255.248.0', | |
39 | '255.255.252.0', | |
40 | '255.255.254.0', | |
41 | '255.255.255.0', | |
42 | '255.255.255.128', | |
43 | '255.255.255.192', | |
44 | '255.255.255.224', | |
45 | '255.255.255.240', | |
46 | '255.255.255.248', | |
47 | '255.255.255.252', | |
48 | '255.255.255.254', | |
49 | '255.255.255.255', | |
50 | ]; | |
51 | ||
52 | our $ipv4_mask_hash_localnet = { | |
53 | '255.255.0.0' => 16, | |
54 | '255.255.128.0' => 17, | |
55 | '255.255.192.0' => 18, | |
56 | '255.255.224.0' => 19, | |
57 | '255.255.240.0' => 20, | |
58 | '255.255.248.0' => 21, | |
59 | '255.255.252.0' => 22, | |
60 | '255.255.254.0' => 23, | |
61 | '255.255.255.0' => 24, | |
62 | '255.255.255.128' => 25, | |
63 | '255.255.255.192' => 26, | |
64 | '255.255.255.224' => 27, | |
65 | '255.255.255.240' => 28, | |
66 | '255.255.255.248' => 29, | |
67 | '255.255.255.252' => 30, | |
68 | }; | |
69 | ||
74d1b045 DM |
70 | sub setup_tc_rate_limit { |
71 | my ($iface, $rate, $burst, $debug) = @_; | |
72 | ||
957753df | 73 | system("/sbin/tc class del dev $iface parent 1: classid 1:1 >/dev/null 2>&1"); |
5d35df41 | 74 | system("/sbin/tc filter del dev $iface parent ffff: protocol all pref 50 u32 >/dev/null 2>&1"); |
edde1d46 | 75 | system("/sbin/tc qdisc del dev $iface ingress >/dev/null 2>&1"); |
74d1b045 DM |
76 | system("/sbin/tc qdisc del dev $iface root >/dev/null 2>&1"); |
77 | ||
d6f2623b | 78 | return if !$rate; |
957753df | 79 | |
74d1b045 DM |
80 | # tbf does not work for unknown reason |
81 | #$TC qdisc add dev $DEV root tbf rate $RATE latency 100ms burst $BURST | |
82 | # so we use htb instead | |
83 | run_command("/sbin/tc qdisc add dev $iface root handle 1: htb default 1"); | |
84 | run_command("/sbin/tc class add dev $iface parent 1: classid 1:1 " . | |
85 | "htb rate ${rate}bps burst ${burst}b"); | |
86 | ||
5d35df41 W |
87 | run_command("/sbin/tc qdisc add dev $iface handle ffff: ingress"); |
88 | run_command("/sbin/tc filter add dev $iface parent ffff: " . | |
89 | "protocol all prio 50 u32 match u32 0 0 " . | |
90 | "police rate ${rate}bps burst ${burst}b mtu 64kb " . | |
91 | "drop flowid :1"); | |
92 | ||
74d1b045 DM |
93 | if ($debug) { |
94 | print "DEBUG tc settings\n"; | |
95 | system("/sbin/tc qdisc ls dev $iface"); | |
96 | system("/sbin/tc class ls dev $iface"); | |
97 | system("/sbin/tc filter ls dev $iface parent ffff:"); | |
98 | } | |
99 | } | |
100 | ||
ec9ada18 AD |
101 | sub tap_rate_limit { |
102 | my ($iface, $rate) = @_; | |
103 | ||
104 | my $debug = 0; | |
105 | $rate = int($rate*1024*1024); | |
106 | my $burst = 1024*1024; | |
107 | ||
108 | setup_tc_rate_limit($iface, $rate, $burst, $debug); | |
109 | } | |
74d1b045 | 110 | |
605bb891 DM |
111 | my $read_bridge_mtu = sub { |
112 | my ($bridge) = @_; | |
113 | ||
114 | my $mtu = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/mtu"); | |
115 | die "bridge '$bridge' does not exist\n" if !$mtu; | |
116 | # avoid insecure dependency; | |
117 | die "unable to parse mtu value" if $mtu !~ /^(\d+)$/; | |
118 | $mtu = int($1); | |
119 | ||
120 | return $mtu; | |
121 | }; | |
122 | ||
32cb7d27 | 123 | my $parse_tap_device_name = sub { |
6c80e6d6 | 124 | my ($iface, $noerr) = @_; |
605bb891 DM |
125 | |
126 | my ($vmid, $devid); | |
127 | ||
128 | if ($iface =~ m/^tap(\d+)i(\d+)$/) { | |
129 | $vmid = $1; | |
130 | $devid = $2; | |
32cb7d27 | 131 | } elsif ($iface =~ m/^veth(\d+)i(\d+)$/) { |
605bb891 DM |
132 | $vmid = $1; |
133 | $devid = $2; | |
134 | } else { | |
6c80e6d6 DM |
135 | return undef if $noerr; |
136 | die "can't create firewall bridge for random interface name '$iface'\n"; | |
605bb891 DM |
137 | } |
138 | ||
139 | return ($vmid, $devid); | |
140 | }; | |
141 | ||
70ab4434 | 142 | my $compute_fwbr_names = sub { |
605bb891 DM |
143 | my ($vmid, $devid) = @_; |
144 | ||
145 | my $fwbr = "fwbr${vmid}i${devid}"; | |
f193aa74 | 146 | # Note: the firewall use 'fwln+' to filter traffic to VMs |
7d78a966 AD |
147 | my $vethfw = "fwln${vmid}i${devid}"; |
148 | my $vethfwpeer = "fwpr${vmid}p${devid}"; | |
149 | my $ovsintport = "fwln${vmid}o${devid}"; | |
605bb891 | 150 | |
70ab4434 | 151 | return ($fwbr, $vethfw, $vethfwpeer, $ovsintport); |
605bb891 DM |
152 | }; |
153 | ||
154 | my $cond_create_bridge = sub { | |
155 | my ($bridge) = @_; | |
156 | ||
157 | if (! -d "/sys/class/net/$bridge") { | |
158 | system("/sbin/brctl addbr $bridge") == 0 || | |
159 | die "can't add bridge '$bridge'\n"; | |
160 | } | |
161 | }; | |
162 | ||
163 | my $bridge_add_interface = sub { | |
b0b34ffd | 164 | my ($bridge, $iface, $tag, $trunks) = @_; |
605bb891 DM |
165 | |
166 | system("/sbin/brctl addif $bridge $iface") == 0 || | |
167 | die "can't add interface 'iface' to bridge '$bridge'\n"; | |
4d25f4aa AD |
168 | |
169 | my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering"); | |
170 | ||
171 | if ($vlan_aware) { | |
172 | if ($tag) { | |
173 | system("/sbin/bridge vlan add dev $iface vid $tag pvid untagged") == 0 || | |
174 | die "unable to add vlan $tag to interface $iface\n"; | |
175 | } else { | |
176 | system("/sbin/bridge vlan add dev $iface vid 2-4094") == 0 || | |
b0b34ffd | 177 | die "unable to add default vlan tags to interface $iface\n" if !$trunks; |
4d25f4aa | 178 | } |
b0b34ffd | 179 | |
846337ad WB |
180 | if ($trunks) { |
181 | my @trunks_array = split /;/, $trunks; | |
182 | foreach my $trunk (@trunks_array) { | |
183 | system("/sbin/bridge vlan add dev $iface vid $trunk") == 0 || | |
184 | die "unable to add vlan $trunk to interface $iface\n"; | |
185 | } | |
b0b34ffd | 186 | } |
4d25f4aa | 187 | } |
605bb891 DM |
188 | }; |
189 | ||
70ab4434 | 190 | my $ovs_bridge_add_port = sub { |
b0b34ffd AD |
191 | my ($bridge, $iface, $tag, $internal, $trunks) = @_; |
192 | ||
193 | $trunks =~ s/;/,/g if $trunks; | |
70ab4434 DM |
194 | |
195 | my $cmd = "/usr/bin/ovs-vsctl add-port $bridge $iface"; | |
196 | $cmd .= " tag=$tag" if $tag; | |
b0b34ffd AD |
197 | $cmd .= " trunks=". join(',', $trunks) if $trunks; |
198 | $cmd .= " vlan_mode=native-untagged" if $tag && $trunks; | |
199 | ||
70ab4434 DM |
200 | $cmd .= " -- set Interface $iface type=internal" if $internal; |
201 | system($cmd) == 0 || | |
202 | die "can't add ovs port '$iface'\n"; | |
203 | }; | |
204 | ||
605bb891 DM |
205 | my $activate_interface = sub { |
206 | my ($iface) = @_; | |
207 | ||
208 | system("/sbin/ip link set $iface up") == 0 || | |
209 | die "can't activate interface '$iface'\n"; | |
210 | }; | |
211 | ||
3aa99c70 AD |
212 | sub tap_create { |
213 | my ($iface, $bridge) = @_; | |
214 | ||
215 | die "unable to get bridge setting\n" if !$bridge; | |
216 | ||
605bb891 | 217 | my $bridgemtu = &$read_bridge_mtu($bridge); |
3aa99c70 | 218 | |
098795e0 DM |
219 | eval { |
220 | PVE::Tools::run_command("/sbin/ifconfig $iface 0.0.0.0 promisc up mtu $bridgemtu"); | |
221 | }; | |
222 | die "interface activation failed\n" if $@; | |
3aa99c70 AD |
223 | } |
224 | ||
35efc4eb AD |
225 | sub veth_create { |
226 | my ($veth, $vethpeer, $bridge, $mac) = @_; | |
227 | ||
228 | die "unable to get bridge setting\n" if !$bridge; | |
229 | ||
230 | my $bridgemtu = &$read_bridge_mtu($bridge); | |
231 | ||
232 | # create veth pair | |
233 | if (! -d "/sys/class/net/$veth") { | |
234 | my $cmd = "/sbin/ip link add name $veth type veth peer name $vethpeer mtu $bridgemtu"; | |
235 | $cmd .= " addr $mac" if $mac; | |
236 | system($cmd) == 0 || die "can't create interface $veth\n"; | |
237 | } | |
238 | ||
239 | # up vethpair | |
240 | &$activate_interface($veth); | |
241 | &$activate_interface($vethpeer); | |
242 | } | |
243 | ||
f3f0bc3a AD |
244 | sub veth_delete { |
245 | my ($veth) = @_; | |
246 | ||
247 | if (-d "/sys/class/net/$veth") { | |
248 | run_command("/sbin/ip link delete dev $veth", outfunc => sub {}, errfunc => sub {}); | |
249 | } | |
250 | ||
251 | } | |
35efc4eb | 252 | |
605bb891 | 253 | my $create_firewall_bridge_linux = sub { |
b0b34ffd | 254 | my ($iface, $bridge, $tag, $trunks) = @_; |
605bb891 | 255 | |
32cb7d27 | 256 | my ($vmid, $devid) = &$parse_tap_device_name($iface); |
70ab4434 | 257 | my ($fwbr, $vethfw, $vethfwpeer) = &$compute_fwbr_names($vmid, $devid); |
605bb891 | 258 | |
605bb891 DM |
259 | &$cond_create_bridge($fwbr); |
260 | &$activate_interface($fwbr); | |
261 | ||
262 | copy_bridge_config($bridge, $fwbr); | |
35efc4eb | 263 | veth_create($vethfw, $vethfwpeer, $bridge); |
605bb891 | 264 | |
7d78a966 | 265 | &$bridge_add_interface($fwbr, $vethfw); |
b0b34ffd | 266 | &$bridge_add_interface($bridge, $vethfwpeer, $tag, $trunks); |
605bb891 | 267 | |
4d25f4aa | 268 | &$bridge_add_interface($fwbr, $iface); |
605bb891 DM |
269 | }; |
270 | ||
70ab4434 | 271 | my $create_firewall_bridge_ovs = sub { |
b0b34ffd | 272 | my ($iface, $bridge, $tag, $trunks) = @_; |
70ab4434 | 273 | |
32cb7d27 | 274 | my ($vmid, $devid) = &$parse_tap_device_name($iface); |
70ab4434 DM |
275 | my ($fwbr, undef, undef, $ovsintport) = &$compute_fwbr_names($vmid, $devid); |
276 | ||
277 | my $bridgemtu = &$read_bridge_mtu($bridge); | |
278 | ||
279 | &$cond_create_bridge($fwbr); | |
280 | &$activate_interface($fwbr); | |
281 | ||
282 | &$bridge_add_interface($fwbr, $iface); | |
283 | ||
b0b34ffd | 284 | &$ovs_bridge_add_port($bridge, $ovsintport, $tag, 1, $trunks); |
ac3a04b8 | 285 | &$activate_interface($ovsintport); |
70ab4434 DM |
286 | |
287 | # set the same mtu for ovs int port | |
288 | PVE::Tools::run_command("/sbin/ifconfig $ovsintport mtu $bridgemtu"); | |
289 | ||
290 | &$bridge_add_interface($fwbr, $ovsintport); | |
291 | }; | |
292 | ||
293 | my $cleanup_firewall_bridge = sub { | |
605bb891 DM |
294 | my ($iface) = @_; |
295 | ||
32cb7d27 | 296 | my ($vmid, $devid) = &$parse_tap_device_name($iface, 1); |
6c80e6d6 | 297 | return if !defined($vmid); |
70ab4434 DM |
298 | my ($fwbr, $vethfw, $vethfwpeer, $ovsintport) = &$compute_fwbr_names($vmid, $devid); |
299 | ||
300 | # cleanup old port config from any openvswitch bridge | |
301 | if (-d "/sys/class/net/$ovsintport") { | |
302 | run_command("/usr/bin/ovs-vsctl del-port $ovsintport", outfunc => sub {}, errfunc => sub {}); | |
303 | } | |
605bb891 DM |
304 | |
305 | # delete old vethfw interface | |
f3f0bc3a | 306 | veth_delete($vethfw); |
605bb891 DM |
307 | |
308 | # cleanup fwbr bridge | |
309 | if (-d "/sys/class/net/$fwbr") { | |
310 | run_command("/sbin/ip link set dev $fwbr down", outfunc => sub {}, errfunc => sub {}); | |
311 | run_command("/sbin/brctl delbr $fwbr", outfunc => sub {}, errfunc => sub {}); | |
312 | } | |
313 | }; | |
314 | ||
f0c190ee | 315 | sub tap_plug { |
b0b34ffd | 316 | my ($iface, $bridge, $tag, $firewall, $trunks) = @_; |
f0c190ee | 317 | |
4cbabd40 AD |
318 | #cleanup old port config from any openvswitch bridge |
319 | eval {run_command("/usr/bin/ovs-vsctl del-port $iface", outfunc => sub {}, errfunc => sub {}) }; | |
320 | ||
098795e0 | 321 | if (-d "/sys/class/net/$bridge/bridge") { |
70ab4434 | 322 | &$cleanup_firewall_bridge($iface); # remove stale devices |
605bb891 | 323 | |
4d25f4aa | 324 | my $vlan_aware = PVE::Tools::file_read_firstline("/sys/class/net/$bridge/bridge/vlan_filtering"); |
098795e0 | 325 | |
4d25f4aa | 326 | if (!$vlan_aware) { |
b0b34ffd | 327 | die "vlan aware feature need to be enabled to use trunks" if $trunks; |
4d25f4aa AD |
328 | my $newbridge = activate_bridge_vlan($bridge, $tag); |
329 | copy_bridge_config($bridge, $newbridge) if $bridge ne $newbridge; | |
ff042056 | 330 | $bridge = $newbridge; |
4d25f4aa AD |
331 | $tag = undef; |
332 | } | |
333 | ||
334 | if ($firewall) { | |
b0b34ffd | 335 | &$create_firewall_bridge_linux($iface, $bridge, $tag, $trunks); |
4d25f4aa | 336 | } else { |
b0b34ffd | 337 | &$bridge_add_interface($bridge, $iface, $tag, $trunks); |
4d25f4aa | 338 | } |
605bb891 | 339 | |
098795e0 | 340 | } else { |
70ab4434 DM |
341 | &$cleanup_firewall_bridge($iface); # remove stale devices |
342 | ||
343 | if ($firewall) { | |
b0b34ffd | 344 | &$create_firewall_bridge_ovs($iface, $bridge, $tag, $trunks); |
70ab4434 | 345 | } else { |
b0b34ffd | 346 | &$ovs_bridge_add_port($bridge, $iface, $tag, undef, $trunks); |
70ab4434 | 347 | } |
4cbabd40 | 348 | } |
f0c190ee AD |
349 | } |
350 | ||
a84b65c0 | 351 | sub tap_unplug { |
2db1cc0d | 352 | my ($iface) = @_; |
a84b65c0 | 353 | |
2db1cc0d DM |
354 | my $path= "/sys/class/net/$iface/brport/bridge"; |
355 | if (-l $path) { | |
356 | my $bridge = basename(readlink($path)); | |
357 | #avoid insecure dependency; | |
358 | ($bridge) = $bridge =~ /(\S+)/; | |
4cbabd40 | 359 | |
098795e0 | 360 | system("/sbin/brctl delif $bridge $iface") == 0 || |
2db1cc0d | 361 | die "can't del interface '$iface' from bridge '$bridge'\n"; |
605bb891 | 362 | |
4cbabd40 | 363 | } |
70ab4434 DM |
364 | |
365 | &$cleanup_firewall_bridge($iface); | |
a84b65c0 AD |
366 | } |
367 | ||
b9436cda DM |
368 | sub copy_bridge_config { |
369 | my ($br0, $br1) = @_; | |
370 | ||
371 | return if $br0 eq $br1; | |
372 | ||
373 | my $br_configs = [ 'ageing_time', 'stp_state', 'priority', 'forward_delay', | |
ba4af65b | 374 | 'hello_time', 'max_age', 'multicast_snooping', 'multicast_querier']; |
b9436cda DM |
375 | |
376 | foreach my $sysname (@$br_configs) { | |
377 | eval { | |
378 | my $v0 = PVE::Tools::file_read_firstline("/sys/class/net/$br0/bridge/$sysname"); | |
379 | my $v1 = PVE::Tools::file_read_firstline("/sys/class/net/$br1/bridge/$sysname"); | |
380 | if ($v0 ne $v1) { | |
aec04803 | 381 | PVE::ProcFSTools::write_proc_entry("/sys/class/net/$br1/bridge/$sysname", $v0); |
b9436cda DM |
382 | } |
383 | }; | |
384 | warn $@ if $@; | |
385 | } | |
386 | } | |
387 | ||
70d89745 PRG |
388 | sub activate_bridge_vlan_slave { |
389 | my ($bridgevlan, $iface, $tag) = @_; | |
b9436cda | 390 | my $ifacevlan = "${iface}.$tag"; |
70d89745 | 391 | |
b9436cda DM |
392 | # create vlan on $iface is not already exist |
393 | if (! -d "/sys/class/net/$ifacevlan") { | |
6fc54cb2 | 394 | system("/sbin/ip link add link $iface name ${iface}.${tag} type vlan id $tag") == 0 || |
02c9a6b4 | 395 | die "can't add vlan tag $tag to interface $iface\n"; |
b9436cda DM |
396 | } |
397 | ||
398 | # be sure to have the $ifacevlan up | |
605bb891 | 399 | &$activate_interface($ifacevlan); |
b9436cda DM |
400 | |
401 | # test if $vlaniface is already enslaved in another bridge | |
402 | my $path= "/sys/class/net/$ifacevlan/brport/bridge"; | |
403 | if (-l $path) { | |
404 | my $tbridge = basename(readlink($path)); | |
70d89745 | 405 | if ($tbridge ne $bridgevlan) { |
b9436cda | 406 | die "interface $ifacevlan already exist in bridge $tbridge\n"; |
eee4b32a PRG |
407 | } else { |
408 | # Port already attached to bridge: do nothing. | |
409 | return; | |
b9436cda DM |
410 | } |
411 | } | |
412 | ||
70d89745 | 413 | # add $ifacevlan to the bridge |
605bb891 | 414 | &$bridge_add_interface($bridgevlan, $ifacevlan); |
70d89745 PRG |
415 | } |
416 | ||
417 | sub activate_bridge_vlan { | |
418 | my ($bridge, $tag_param) = @_; | |
419 | ||
420 | die "bridge '$bridge' is not active\n" if ! -d "/sys/class/net/$bridge"; | |
421 | ||
422 | return $bridge if !defined($tag_param); # no vlan, simply return | |
423 | ||
424 | my $tag = int($tag_param); | |
425 | ||
426 | die "got strange vlan tag '$tag_param'\n" if $tag < 1 || $tag > 4094; | |
427 | ||
428 | my $bridgevlan = "${bridge}v$tag"; | |
429 | ||
c9030d97 PRG |
430 | my @ifaces = (); |
431 | my $dir = "/sys/class/net/$bridge/brif"; | |
ce1c3cc4 | 432 | PVE::Tools::dir_glob_foreach($dir, '((eth|bond)\d+(\.\d+)?)', sub { |
5ffa7628 | 433 | push @ifaces, $_[0]; |
c9030d97 PRG |
434 | }); |
435 | ||
5ffa7628 | 436 | die "no physical interface on bridge '$bridge'\n" if scalar(@ifaces) == 0; |
c9030d97 | 437 | |
b9436cda DM |
438 | # add bridgevlan if it doesn't already exist |
439 | if (! -d "/sys/class/net/$bridgevlan") { | |
9e14b1b7 | 440 | system("/sbin/brctl addbr $bridgevlan") == 0 || |
b9436cda DM |
441 | die "can't add bridge $bridgevlan\n"; |
442 | } | |
443 | ||
70d89745 | 444 | # for each physical interface (eth or bridge) bind them to bridge vlan |
c9030d97 PRG |
445 | foreach my $iface (@ifaces) { |
446 | activate_bridge_vlan_slave($bridgevlan, $iface, $tag); | |
447 | } | |
70d89745 | 448 | |
b9436cda DM |
449 | #fixme: set other bridge flags |
450 | ||
451 | # be sure to have the bridge up | |
452 | system("/sbin/ip link set $bridgevlan up") == 0 || | |
453 | die "can't up bridge $bridgevlan\n"; | |
70d89745 | 454 | |
b9436cda DM |
455 | return $bridgevlan; |
456 | } | |
457 | ||
b6bff92e WB |
458 | sub tcp_ping { |
459 | my ($host, $port, $timeout) = @_; | |
460 | ||
461 | my $refused = 1; | |
462 | ||
463 | $timeout = 3 if !$timeout; # sane default | |
464 | if (!$port) { | |
465 | # Net::Ping defaults to the echo port | |
466 | $port = 7; | |
467 | } else { | |
468 | # Net::Ping's port_number() implies service_check(1) | |
469 | $refused = 0; | |
470 | } | |
471 | ||
472 | my ($sock, $result); | |
473 | eval { | |
474 | $result = PVE::Tools::run_with_timeout($timeout, sub { | |
475 | $sock = IO::Socket::IP->new(PeerHost => $host, PeerPort => $port, Type => SOCK_STREAM); | |
476 | $result = $refused if $! == ECONNREFUSED; | |
477 | }); | |
478 | }; | |
479 | if ($sock) { | |
480 | $sock->close(); | |
481 | $result = 1; | |
482 | } | |
483 | return $result; | |
484 | } | |
485 | ||
bf52d27b WB |
486 | sub IP_from_cidr { |
487 | my ($cidr, $version) = @_; | |
488 | ||
489 | return if $cidr !~ m!^(\S+?)/(\S+)$!; | |
490 | my ($ip, $prefix) = ($1, $2); | |
491 | ||
492 | my $ipobj = Net::IP->new($ip, $version); | |
493 | return if !$ipobj; | |
494 | ||
495 | $version = $ipobj->version(); | |
496 | ||
497 | my $binmask = Net::IP::ip_get_mask($prefix, $version); | |
498 | return if !$binmask; | |
499 | ||
500 | my $masked_binip = $ipobj->binip() & $binmask; | |
501 | my $masked_ip = Net::IP::ip_bintoip($masked_binip, $version); | |
502 | return Net::IP->new("$masked_ip/$prefix"); | |
503 | } | |
504 | ||
505 | sub is_ip_in_cidr { | |
506 | my ($ip, $cidr, $version) = @_; | |
507 | ||
508 | my $cidr_obj = IP_from_cidr($cidr, $version); | |
509 | return undef if !$cidr_obj; | |
510 | ||
511 | my $ip_obj = Net::IP->new($ip, $version); | |
512 | return undef if !$ip_obj; | |
513 | ||
514 | return $cidr_obj->overlaps($ip_obj) == $Net::IP::IP_B_IN_A_OVERLAP; | |
515 | } | |
516 | ||
b9436cda | 517 | 1; |