3 # Copyright (C) 2015, 2017 Cumulus Networks, Inc. all rights reserved
5 # This program is free software; you can redistribute it and/or
6 # modify it under the terms of the GNU General Public License as
7 # published by the Free Software Foundation; version 2.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with this program; if not, write to the Free Software
16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 # https://www.gnu.org/licenses/gpl-2.0-standalone.html
22 # Daniel Walton, dwalton@cumulusnetworks.com
23 # Julien Fortin, julien@cumulusnetworks.com
28 from collections
import OrderedDict
29 from ipaddr
import IPv4Address
, IPv6Address
30 from nlpacket
import *
31 from select
import select
32 from struct
import pack
, unpack
37 log
= logging
.getLogger(__name__
)
40 class NetlinkError(Exception):
44 class NetlinkNoAddressError(NetlinkError
):
48 class NetlinkInterruptedSystemCall(NetlinkError
):
52 class InvalidInterfaceNameVlanCombo(Exception):
56 class Sequence(object):
66 class NetlinkManager(object):
68 def __init__(self
, pid_offset
=0, use_color
=True, log_level
=None):
69 # PID_MAX_LIMIT is 2^22 allowing 1024 sockets per-pid. We default to 0
70 # in the upper space (top 10 bits), which will simply be the PID. Other
71 # NetlinkManager instantiations in the same process can choose other
72 # offsets to avoid conflicts with each other.
73 self
.pid
= os
.getpid() |
(pid_offset
<< 22)
74 self
.sequence
= Sequence()
75 self
.shutdown_flag
= False
78 self
.use_color
= use_color
82 self
.debug_link(False)
83 self
.debug_address(False)
84 self
.debug_neighbor(False)
85 self
.debug_route(False)
88 log
.setLevel(log_level
)
89 set_log_level(log_level
)
92 return 'NetlinkManager'
94 def signal_term_handler(self
, signal
, frame
):
95 log
.info("NetlinkManager: Caught SIGTERM")
96 self
.shutdown_flag
= True
98 def signal_int_handler(self
, signal
, frame
):
99 log
.info("NetlinkManager: Caught SIGINT")
100 self
.shutdown_flag
= True
104 self
.tx_socket
.close()
105 self
.tx_socket
= None
106 log
.info("NetlinkManager: shutdown complete")
108 def _debug_set_clear(self
, msg_types
, enabled
):
110 Enable or disable debugs for all msgs_types messages
120 def debug_link(self
, enabled
):
121 self
._debug
_set
_clear
((RTM_NEWLINK
, RTM_DELLINK
, RTM_GETLINK
, RTM_SETLINK
), enabled
)
123 def debug_address(self
, enabled
):
124 self
._debug
_set
_clear
((RTM_NEWADDR
, RTM_DELADDR
, RTM_GETADDR
), enabled
)
126 def debug_neighbor(self
, enabled
):
127 self
._debug
_set
_clear
((RTM_NEWNEIGH
, RTM_DELNEIGH
, RTM_GETNEIGH
), enabled
)
129 def debug_route(self
, enabled
):
130 self
._debug
_set
_clear
((RTM_NEWROUTE
, RTM_DELROUTE
, RTM_GETROUTE
), enabled
)
132 def debug_netconf(self
, enabled
):
133 self
._debug
_set
_clear
((RTM_GETNETCONF
, RTM_NEWNETCONF
), enabled
)
135 def debug_this_packet(self
, mtype
):
136 if mtype
in self
.debug
:
140 def tx_socket_allocate(self
):
142 The TX socket is used for install requests, sending RTM_GETXXXX
145 self
.tx_socket
= socket
.socket(socket
.AF_NETLINK
, socket
.SOCK_RAW
, 0)
146 self
.tx_socket
.bind((self
.pid
, 0))
148 def tx_nlpacket_raw(self
, message
):
150 TX a bunch of concatenated nlpacket.messages....do NOT wait for an ACK
152 if not self
.tx_socket
:
153 self
.tx_socket_allocate()
154 self
.tx_socket
.sendall(message
)
156 def tx_nlpacket(self
, nlpacket
):
158 TX a netlink packet but do NOT wait for an ACK
160 if not nlpacket
.message
:
161 log
.error('You must first call build_message() to create the packet')
164 if not self
.tx_socket
:
165 self
.tx_socket_allocate()
166 self
.tx_socket
.sendall(nlpacket
.message
)
168 def tx_nlpacket_get_response(self
, nlpacket
):
170 if not nlpacket
.message
:
171 log
.error('You must first call build_message() to create the packet')
174 if not self
.tx_socket
:
175 self
.tx_socket_allocate()
176 self
.tx_socket
.sendall(nlpacket
.message
)
178 # If nlpacket.debug is True we already printed the following in the
179 # build_message() call...so avoid printing two messages for one packet.
180 if not nlpacket
.debug
:
181 log
.debug("TXed %12s, pid %d, seq %d, %d bytes" %
182 (nlpacket
.get_type_string(), nlpacket
.pid
, nlpacket
.seq
, nlpacket
.length
))
184 header_PACK
= NetlinkPacket
.header_PACK
185 header_LEN
= NetlinkPacket
.header_LEN
189 MAX_ERROR_NLE_INTR
= 3
192 # Now listen to our socket and wait for the reply
195 if self
.shutdown_flag
:
196 log
.info('shutdown flag is True, exiting')
199 # Only block for 1 second so we can wake up to see if self.shutdown_flag is True
201 (readable
, writeable
, exceptional
) = select([self
.tx_socket
, ], [], [self
.tx_socket
, ], 1)
202 except Exception as e
:
203 # 4 is Interrupted system call
204 if isinstance(e
.args
, tuple) and e
[0] == 4:
206 log
.info("select() Interrupted system call %d/%d" % (nle_intr_count
, MAX_ERROR_NLE_INTR
))
208 if nle_intr_count
>= MAX_ERROR_NLE_INTR
:
209 raise NetlinkInterruptedSystemCall(error_str
)
220 # Safety net to make sure we do not spend too much time in
221 # this while True loop
222 if null_read
>= MAX_NULL_READS
:
223 log
.info('Socket was not readable for %d attempts' % null_read
)
233 except Exception as e
:
234 # 4 is Interrupted system call
235 if isinstance(e
.args
, tuple) and e
[0] == 4:
237 log
.info("%s: recv() Interrupted system call %d/%d" % (s
, nle_intr_count
, MAX_ERROR_NLE_INTR
))
239 if nle_intr_count
>= MAX_ERROR_NLE_INTR
:
240 raise NetlinkInterruptedSystemCall(error_str
)
247 log
.info('RXed zero length data, the socket is closed')
252 # Extract the length, etc from the header
253 (length
, msgtype
, flags
, seq
, pid
) = unpack(header_PACK
, data
[:header_LEN
])
255 debug_str
= "RXed %12s, pid %d, seq %d, %d bytes" % (NetlinkPacket
.type_to_string
[msgtype
], pid
, seq
, length
)
257 # This shouldn't happen but it would be nice to be aware of it if it does
258 if pid
!= nlpacket
.pid
:
259 log
.debug(debug_str
+ '...we are not interested in this pid %s since ours is %s' %
264 if seq
!= nlpacket
.seq
:
265 log
.debug(debug_str
+ '...we are not interested in this seq %s since ours is %s' %
270 # See if we RXed an ACK for our RTM_GETXXXX
271 if msgtype
== NLMSG_DONE
:
272 log
.debug(debug_str
+ '...this is an ACK')
275 elif msgtype
== NLMSG_ERROR
:
277 msg
= Error(msgtype
, nlpacket
.debug
)
278 msg
.decode_packet(length
, flags
, seq
, pid
, data
)
280 # The error code is a signed negative number.
281 error_code
= abs(msg
.negative_errno
)
283 # 0 is NLE_SUCCESS...everything else is a true error
290 # os.strerror might raise ValueError
291 strerror
= os
.strerror(error_code
)
294 error_str
= "operation failed with '%s' (%s)" % (strerror
, error_code
)
296 error_str
= "operation failed with code %s" % error_code
299 error_str
= "operation failed with code %s" % error_code
301 raise NetlinkError(error_str
)
303 log
.debug('%s code NLE_SUCCESS...this is an ACK' % debug_str
)
306 # No ACK...create a nlpacket object and append it to msgs
310 if msgtype
== RTM_NEWLINK
or msgtype
== RTM_DELLINK
:
311 msg
= Link(msgtype
, nlpacket
.debug
, use_color
=self
.use_color
)
313 elif msgtype
== RTM_NEWADDR
or msgtype
== RTM_DELADDR
:
314 msg
= Address(msgtype
, nlpacket
.debug
, use_color
=self
.use_color
)
316 elif msgtype
== RTM_NEWNEIGH
or msgtype
== RTM_DELNEIGH
:
317 msg
= Neighbor(msgtype
, nlpacket
.debug
, use_color
=self
.use_color
)
319 elif msgtype
== RTM_NEWROUTE
or msgtype
== RTM_DELROUTE
:
320 msg
= Route(msgtype
, nlpacket
.debug
, use_color
=self
.use_color
)
322 elif msgtype
in (RTM_GETNETCONF
, RTM_NEWNETCONF
):
323 msg
= Netconf(msgtype
, nlpacket
.debug
, use_color
=self
.use_color
)
326 raise Exception("RXed unknown netlink message type %s" % msgtype
)
328 msg
.decode_packet(length
, flags
, seq
, pid
, data
)
336 def ip_to_afi(self
, ip
):
339 if type_ip
== IPv4Address
:
340 return socket
.AF_INET
341 elif type_ip
== IPv6Address
:
342 return socket
.AF_INET6
344 raise Exception("%s is an invalid IP type" % type_ip
)
346 def request_dump(self
, rtm_type
, family
, debug
):
348 Issue a RTM_GETROUTE, etc with the NLM_F_DUMP flag
349 set and return the results
352 if rtm_type
== RTM_GETADDR
:
353 msg
= Address(rtm_type
, debug
, use_color
=self
.use_color
)
354 msg
.body
= pack('Bxxxi', family
, 0)
356 elif rtm_type
== RTM_GETLINK
:
357 msg
= Link(rtm_type
, debug
, use_color
=self
.use_color
)
358 msg
.body
= pack('Bxxxiii', family
, 0, 0, 0)
360 elif rtm_type
== RTM_GETNEIGH
:
361 msg
= Neighbor(rtm_type
, debug
, use_color
=self
.use_color
)
362 msg
.body
= pack('Bxxxii', family
, 0, 0)
364 elif rtm_type
== RTM_GETROUTE
:
365 msg
= Route(rtm_type
, debug
, use_color
=self
.use_color
)
366 msg
.body
= pack('Bxxxii', family
, 0, 0)
369 log
.error("request_dump RTM_GET %s is not supported" % rtm_type
)
372 msg
.flags
= NLM_F_REQUEST | NLM_F_DUMP
374 msg
.build_message(self
.sequence
.next(), self
.pid
)
375 return self
.tx_nlpacket_get_response(msg
)
380 def _routes_add_or_delete(self
, add_route
, routes
, ecmp_routes
, table
, protocol
, route_scope
, route_type
):
382 def tx_or_concat_message(total_message
, route
):
384 Adding an ipv4 route only takes 60 bytes, if we are adding thousands
385 of them this can add up to a lot of send calls. Concat several of
386 them together before TXing.
389 if not total_message
:
390 total_message
= route
.message
392 total_message
+= route
.message
394 if len(total_message
) >= PACKET_CONCAT_SIZE
:
395 self
.tx_nlpacket_raw(total_message
)
401 rtm_command
= RTM_NEWROUTE
403 rtm_command
= RTM_DELROUTE
406 PACKET_CONCAT_SIZE
= 16384
407 debug
= rtm_command
in self
.debug
410 for (afi
, ip
, mask
, nexthop
, interface_index
) in routes
:
411 route
= Route(rtm_command
, debug
, use_color
=self
.use_color
)
412 route
.flags
= NLM_F_REQUEST | NLM_F_CREATE
413 route
.body
= pack('BBBBBBBBi', afi
, mask
, 0, 0, table
, protocol
,
414 route_scope
, route_type
, 0)
416 route
.add_attribute(Route
.RTA_DST
, ip
)
418 route
.add_attribute(Route
.RTA_GATEWAY
, nexthop
)
419 route
.add_attribute(Route
.RTA_OIF
, interface_index
)
420 route
.build_message(self
.sequence
.next(), self
.pid
)
421 total_message
= tx_or_concat_message(total_message
, route
)
424 self
.tx_nlpacket_raw(total_message
)
428 for (route_key
, value
) in ecmp_routes
.iteritems():
429 (afi
, ip
, mask
) = route_key
431 route
= Route(rtm_command
, debug
, use_color
=self
.use_color
)
432 route
.flags
= NLM_F_REQUEST | NLM_F_CREATE
433 route
.body
= pack('BBBBBBBBi', afi
, mask
, 0, 0, table
, protocol
,
434 route_scope
, route_type
, 0)
436 route
.add_attribute(Route
.RTA_DST
, ip
)
437 route
.add_attribute(Route
.RTA_MULTIPATH
, value
)
438 route
.build_message(self
.sequence
.next(), self
.pid
)
439 total_message
= tx_or_concat_message(total_message
, route
)
442 self
.tx_nlpacket_raw(total_message
)
444 def routes_add(self
, routes
, ecmp_routes
,
445 table
=Route
.RT_TABLE_MAIN
,
446 protocol
=Route
.RT_PROT_XORP
,
447 route_scope
=Route
.RT_SCOPE_UNIVERSE
,
448 route_type
=Route
.RTN_UNICAST
):
449 self
._routes
_add
_or
_delete
(True, routes
, ecmp_routes
, table
, protocol
, route_scope
, route_type
)
451 def routes_del(self
, routes
, ecmp_routes
,
452 table
=Route
.RT_TABLE_MAIN
,
453 protocol
=Route
.RT_PROT_XORP
,
454 route_scope
=Route
.RT_SCOPE_UNIVERSE
,
455 route_type
=Route
.RTN_UNICAST
):
456 self
._routes
_add
_or
_delete
(False, routes
, ecmp_routes
, table
, protocol
, route_scope
, route_type
)
458 def route_get(self
, ip
, debug
=False):
460 ip must be one of the following:
464 # Transmit a RTM_GETROUTE to query for the route we want
465 route
= Route(RTM_GETROUTE
, debug
, use_color
=self
.use_color
)
466 route
.flags
= NLM_F_REQUEST | NLM_F_ACK
468 # Set everything in the service header as 0 other than the afi
469 afi
= self
.ip_to_afi(ip
)
470 route
.body
= pack('Bxxxxxxxi', afi
, 0)
472 route
.add_attribute(Route
.RTA_DST
, ip
)
473 route
.build_message(self
.sequence
.next(), self
.pid
)
474 return self
.tx_nlpacket_get_response(route
)
476 def routes_dump(self
, family
=socket
.AF_UNSPEC
, debug
=True):
477 return self
.request_dump(RTM_GETROUTE
, family
, debug
)
479 def routes_print(self
, routes
):
481 Print a table of 'routes'
483 print "Prefix Nexthop ifindex"
486 if Route
.RTA_DST
not in x
.attributes
:
487 log
.warning("Route is missing RTA_DST")
490 ip
= "%s/%d" % (x
.attributes
[Route
.RTA_DST
].value
, x
.src_len
)
491 print "%-15s %-15s %s" %\
493 str(x
.attributes
[Route
.RTA_GATEWAY
].value
) if Route
.RTA_GATEWAY
in x
.attributes
else None,
494 x
.attributes
[Route
.RTA_OIF
].value
)
499 def _get_iface_by_name(self
, ifname
):
501 Return a Link object for ifname
503 debug
= RTM_GETLINK
in self
.debug
505 link
= Link(RTM_GETLINK
, debug
, use_color
=self
.use_color
)
506 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
507 link
.body
= pack('=Bxxxiii', socket
.AF_UNSPEC
, 0, 0, 0)
508 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
509 link
.build_message(self
.sequence
.next(), self
.pid
)
512 return self
.tx_nlpacket_get_response(link
)[0]
514 except NetlinkNoAddressError
:
515 log
.info("Netlink did not find interface %s" % ifname
)
518 def _get_iface_by_index(self
, ifindex
):
520 Return a Link object for ifindex
522 debug
= RTM_GETLINK
in self
.debug
524 link
= Link(RTM_GETLINK
, debug
, use_color
=self
.use_color
)
525 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
526 link
.body
= pack('=Bxxxiii', socket
.AF_UNSPEC
, ifindex
, 0, 0)
527 link
.build_message(self
.sequence
.next(), self
.pid
)
529 return self
.tx_nlpacket_get_response(link
)[0]
530 except NetlinkNoAddressError
:
531 log
.info("Netlink did not find interface %s" % ifindex
)
534 def get_iface_index(self
, ifname
):
536 Return the interface index for ifname
538 iface
= self
._get
_iface
_by
_name
(ifname
)
544 def get_iface_name(self
, ifindex
):
545 iface
= self
._get
_iface
_by
_index
(ifindex
)
548 return iface
.attributes
[Link
.IFLA_IFNAME
].get_pretty_value(str)
551 def link_dump(self
, ifname
=None):
552 debug
= RTM_GETLINK
in self
.debug
553 msg
= Link(RTM_GETLINK
, debug
, use_color
=self
.use_color
)
554 msg
.body
= pack('Bxxxiii', socket
.AF_UNSPEC
, 0, 0, 0)
555 msg
.flags
= NLM_F_REQUEST | NLM_F_ACK
558 msg
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
560 msg
.flags |
= NLM_F_DUMP
562 msg
.build_message(self
.sequence
.next(), self
.pid
)
563 return self
.tx_nlpacket_get_response(msg
)
565 def link_set_attrs(self
, ifname
, kind
=None, slave_kind
=None, ifindex
=0, ifla
={}, ifla_info_data
={}, ifla_info_slave_data
={}):
566 debug
= RTM_NEWLINK
in self
.debug
568 link
= Link(RTM_NEWLINK
, debug
, use_color
=self
.use_color
)
569 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
570 link
.body
= pack('Bxxxiii', socket
.AF_UNSPEC
, ifindex
, 0, 0)
572 for nl_attr
, value
in ifla
.items():
573 link
.add_attribute(nl_attr
, value
)
576 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
581 linkinfo
[Link
.IFLA_INFO_KIND
] = kind
582 linkinfo
[Link
.IFLA_INFO_DATA
] = ifla_info_data
584 linkinfo
[Link
.IFLA_INFO_SLAVE_KIND
] = slave_kind
,
585 linkinfo
[Link
.IFLA_INFO_SLAVE_DATA
] = ifla_info_slave_data
587 link
.add_attribute(Link
.IFLA_LINKINFO
, linkinfo
)
588 link
.build_message(self
.sequence
.next(), self
.pid
)
589 return self
.tx_nlpacket_get_response(link
)
591 def link_add_set(self
, kind
,
597 ifla_info_slave_data
={}):
599 Build and TX a RTM_NEWLINK message to add the desired interface
601 debug
= RTM_NEWLINK
in self
.debug
603 link
= Link(RTM_NEWLINK
, debug
, use_color
=self
.use_color
)
604 link
.flags
= NLM_F_CREATE | NLM_F_REQUEST | NLM_F_ACK
605 link
.body
= pack('Bxxxiii', socket
.AF_UNSPEC
, ifindex
, 0, 0)
607 for nl_attr
, value
in ifla
.items():
608 link
.add_attribute(nl_attr
, value
)
611 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
615 linkinfo
[Link
.IFLA_INFO_KIND
] = kind
616 linkinfo
[Link
.IFLA_INFO_DATA
] = ifla_info_data
618 linkinfo
[Link
.IFLA_INFO_SLAVE_KIND
] = slave_kind
619 linkinfo
[Link
.IFLA_INFO_SLAVE_DATA
] = ifla_info_slave_data
620 link
.add_attribute(Link
.IFLA_LINKINFO
, linkinfo
)
622 link
.build_message(self
.sequence
.next(), self
.pid
)
623 return self
.tx_nlpacket_get_response(link
)
625 def link_del(self
, ifindex
=None, ifname
=None):
626 if not ifindex
and not ifname
:
627 raise ValueError('invalid ifindex and/or ifname')
630 ifindex
= self
.get_iface_index(ifname
)
632 debug
= RTM_DELLINK
in self
.debug
634 link
= Link(RTM_DELLINK
, debug
, use_color
=self
.use_color
)
635 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
636 link
.body
= pack('Bxxxiii', socket
.AF_UNSPEC
, ifindex
, 0, 0)
637 link
.build_message(self
.sequence
.next(), self
.pid
)
638 return self
.tx_nlpacket_get_response(link
)
640 def _link_add(self
, ifindex
, ifname
, kind
, ifla_info_data
):
642 Build and TX a RTM_NEWLINK message to add the desired interface
644 debug
= RTM_NEWLINK
in self
.debug
646 link
= Link(RTM_NEWLINK
, debug
, use_color
=self
.use_color
)
647 link
.flags
= NLM_F_CREATE | NLM_F_REQUEST | NLM_F_ACK
648 link
.body
= pack('Bxxxiii', socket
.AF_UNSPEC
, 0, 0, 0)
649 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
652 link
.add_attribute(Link
.IFLA_LINK
, ifindex
)
654 link
.add_attribute(Link
.IFLA_LINKINFO
, {
655 Link
.IFLA_INFO_KIND
: kind
,
656 Link
.IFLA_INFO_DATA
: ifla_info_data
658 link
.build_message(self
.sequence
.next(), self
.pid
)
659 return self
.tx_nlpacket_get_response(link
)
661 def link_add_bridge(self
, ifname
, ifla_info_data
={}):
662 return self
._link
_add
(ifindex
=None, ifname
=ifname
, kind
='bridge', ifla_info_data
=ifla_info_data
)
664 def link_add_vlan(self
, ifindex
, ifname
, vlanid
, vlan_protocol
=None):
666 ifindex is the index of the parent interface that this sub-interface
671 If you name an interface swp2.17 but assign it to vlan 12, the kernel
672 will return a very misleading NLE_MSG_OVERFLOW error. It only does
673 this check if the ifname uses dot notation.
675 Do this check here so we can provide a more intuitive error
678 ifname_vlanid
= int(ifname
.split('.')[-1])
680 if ifname_vlanid
!= vlanid
:
681 raise InvalidInterfaceNameVlanCombo("Interface %s must belong "
682 "to VLAN %d (VLAN %d was requested)" %
683 (ifname
, ifname_vlanid
, vlanid
))
685 ifla_info_data
= {Link
.IFLA_VLAN_ID
: vlanid
}
688 ifla_info_data
[Link
.IFLA_VLAN_PROTOCOL
] = vlan_protocol
690 return self
._link
_add
(ifindex
, ifname
, 'vlan', ifla_info_data
)
692 def link_add_macvlan(self
, ifindex
, ifname
):
694 ifindex is the index of the parent interface that this sub-interface
697 return self
._link
_add
(ifindex
, ifname
, 'macvlan', {Link
.IFLA_MACVLAN_MODE
: Link
.MACVLAN_MODE_PRIVATE
})
699 def link_add_xfrm(self
, physdev
, xfrm_ifname
, xfrm_id
):
701 ifindex is the index of the parent interface that this sub-interface
705 Link
.IFLA_XFRM_IF_ID
: int(xfrm_id
),
706 Link
.IFLA_XFRM_LINK
: int(physdev
)
709 return self
._link
_add
(ifindex
=None, ifname
=xfrm_ifname
, kind
='xfrm', ifla_info_data
=ifla_info_data
)
711 def vlan_get(self
, filter_ifindex
=None, filter_vlanid
=None, compress_vlans
=True):
713 filter_ifindex should be a tuple if interface indexes, this is a whitelist filter
714 filter_vlandid should be a tuple if VLAN IDs, this is a whitelist filter
716 debug
= RTM_GETLINK
in self
.debug
718 link
= Link(RTM_GETLINK
, debug
, use_color
=self
.use_color
)
719 link
.family
= AF_BRIDGE
720 link
.flags
= NLM_F_DUMP | NLM_F_REQUEST
721 link
.body
= pack('Bxxxiii', socket
.AF_BRIDGE
, 0, 0, 0)
724 link
.add_attribute(Link
.IFLA_EXT_MASK
, Link
.RTEXT_FILTER_BRVLAN_COMPRESSED
)
726 link
.add_attribute(Link
.IFLA_EXT_MASK
, Link
.RTEXT_FILTER_BRVLAN
)
728 link
.build_message(self
.sequence
.next(), self
.pid
)
729 reply
= self
.tx_nlpacket_get_response(link
)
734 if msg
.family
!= socket
.AF_BRIDGE
:
737 if filter_ifindex
and msg
.ifindex
not in filter_ifindex
:
740 ifla_af_spec
= msg
.get_attribute_value(Link
.IFLA_AF_SPEC
)
745 ifname
= msg
.get_attribute_value(Link
.IFLA_IFNAME
)
750 20: 0x1c001a00 .... Length 0x001c (28), Type 0x001a (26) IFLA_AF_SPEC
751 21: 0x08000200 .... Nested Attribute - Length 0x0008 (8), Type 0x0002 (2) IFLA_BRIDGE_VLAN_INFO
753 23: 0x08000200 .... Nested Attribute - Length 0x0008 (8), Type 0x0002 (2) IFLA_BRIDGE_VLAN_INFO
755 25: 0x08000200 .... Nested Attribute - Length 0x0008 (8), Type 0x0002 (2) IFLA_BRIDGE_VLAN_INFO
758 for (x_type
, x_value
) in ifla_af_spec
.iteritems():
759 if x_type
== Link
.IFLA_BRIDGE_VLAN_INFO
:
760 for (vlan_flag
, vlan_id
) in x_value
:
761 if filter_vlanid
is None or vlan_id
in filter_vlanid
:
763 if ifname
not in iface_vlans
:
764 iface_vlans
[ifname
] = []
766 # We store these in the tuple as (vlan, flag) instead (flag, vlan)
767 # so that we can sort the list of tuples
768 iface_vlans
[ifname
].append((vlan_id
, vlan_flag
))
772 def vlan_show(self
, filter_ifindex
=None, filter_vlanid
=None, compress_vlans
=True):
774 def vlan_flag_to_string(vlan_flag
):
776 if vlan_flag
& Link
.BRIDGE_VLAN_INFO_PVID
:
777 flag_str
.append('PVID')
779 if vlan_flag
& Link
.BRIDGE_VLAN_INFO_UNTAGGED
:
780 flag_str
.append('Egress Untagged')
782 return ', '.join(flag_str
)
784 iface_vlans
= self
.vlan_get(filter_ifindex
, filter_vlanid
, compress_vlans
)
785 log
.debug("iface_vlans:\n%s\n" % pformat(iface_vlans
))
786 range_begin_vlan_id
= None
789 print " Interface VLAN Flags"
790 print " ========== ==== ====="
792 for (ifname
, vlan_tuples
) in sorted(iface_vlans
.iteritems()):
793 for (vlan_id
, vlan_flag
) in sorted(vlan_tuples
):
795 if vlan_flag
& Link
.BRIDGE_VLAN_INFO_RANGE_BEGIN
:
796 range_begin_vlan_id
= vlan_id
797 range_flag
= vlan_flag
799 elif vlan_flag
& Link
.BRIDGE_VLAN_INFO_RANGE_END
:
800 range_flag |
= vlan_flag
802 if not range_begin_vlan_id
:
803 log
.warning("BRIDGE_VLAN_INFO_RANGE_END is %d but we never saw a BRIDGE_VLAN_INFO_RANGE_BEGIN" % vlan_id
)
804 range_begin_vlan_id
= vlan_id
806 for x
in xrange(range_begin_vlan_id
, vlan_id
+ 1):
807 print " %10s %4d %s" % (ifname
, x
, vlan_flag_to_string(vlan_flag
))
810 range_begin_vlan_id
= None
814 print " %10s %4d %s" % (ifname
, vlan_id
, vlan_flag_to_string(vlan_flag
))
818 def vlan_modify(self
, msgtype
, ifindex
, vlanid_start
, vlanid_end
=None, bridge_self
=False, bridge_master
=False, pvid
=False, untagged
=False):
820 iproute2 bridge/vlan.c vlan_modify()
822 assert msgtype
in (RTM_SETLINK
, RTM_DELLINK
), "Invalid msgtype %s, must be RTM_SETLINK or RTM_DELLINK" % msgtype
823 assert vlanid_start
>= 1 and vlanid_start
<= 4096, "Invalid VLAN start %s" % vlanid_start
825 if vlanid_end
is None:
826 vlanid_end
= vlanid_start
828 assert vlanid_end
>= 1 and vlanid_end
<= 4096, "Invalid VLAN end %s" % vlanid_end
829 assert vlanid_start
<= vlanid_end
, "Invalid VLAN range %s-%s, start must be <= end" % (vlanid_start
, vlanid_end
)
831 debug
= msgtype
in self
.debug
835 link
= Link(msgtype
, debug
, use_color
=self
.use_color
)
836 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
837 link
.body
= pack('Bxxxiii', socket
.AF_BRIDGE
, ifindex
, 0, 0)
840 bridge_flags |
= Link
.BRIDGE_FLAGS_SELF
843 bridge_flags |
= Link
.BRIDGE_FLAGS_MASTER
846 vlan_info_flags |
= Link
.BRIDGE_VLAN_INFO_PVID
849 vlan_info_flags |
= Link
.BRIDGE_VLAN_INFO_UNTAGGED
851 ifla_af_spec
= OrderedDict()
854 ifla_af_spec
[Link
.IFLA_BRIDGE_FLAGS
] = bridge_flags
857 if vlanid_start
== vlanid_end
:
858 ifla_af_spec
[Link
.IFLA_BRIDGE_VLAN_INFO
] = [(vlan_info_flags
, vlanid_start
), ]
862 ifla_af_spec
[Link
.IFLA_BRIDGE_VLAN_INFO
] = [
863 (vlan_info_flags | Link
.BRIDGE_VLAN_INFO_RANGE_BEGIN
, vlanid_start
),
864 (vlan_info_flags | Link
.BRIDGE_VLAN_INFO_RANGE_END
, vlanid_end
)
867 link
.add_attribute(Link
.IFLA_AF_SPEC
, ifla_af_spec
)
868 link
.build_message(self
.sequence
.next(), self
.pid
)
869 return self
.tx_nlpacket_get_response(link
)
871 def link_add_bridge_vlan(self
, ifindex
, vlanid_start
, vlanid_end
=None, pvid
=False, untagged
=False, master
=False):
873 Add VLAN(s) to a bridge interface
875 bridge_self
= False if master
else True
876 self
.vlan_modify(RTM_SETLINK
, ifindex
, vlanid_start
, vlanid_end
, bridge_self
, master
, pvid
, untagged
)
878 def link_del_bridge_vlan(self
, ifindex
, vlanid_start
, vlanid_end
=None, pvid
=False, untagged
=False, master
=False):
880 Delete VLAN(s) from a bridge interface
882 bridge_self
= False if master
else True
883 self
.vlan_modify(RTM_DELLINK
, ifindex
, vlanid_start
, vlanid_end
, bridge_self
, master
, pvid
, untagged
)
885 def link_set_updown(self
, ifname
, state
):
887 Either bring ifname up or take it down
891 if_flags
= Link
.IFF_UP
892 elif state
== 'down':
895 raise Exception('Unsupported state %s, valid options are "up" and "down"' % state
)
897 debug
= RTM_NEWLINK
in self
.debug
898 if_change
= Link
.IFF_UP
900 link
= Link(RTM_NEWLINK
, debug
, use_color
=self
.use_color
)
901 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
902 link
.body
= pack('=BxxxiLL', socket
.AF_UNSPEC
, 0, if_flags
, if_change
)
903 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
904 link
.build_message(self
.sequence
.next(), self
.pid
)
905 return self
.tx_nlpacket_get_response(link
)
907 def link_set_protodown(self
, ifname
, state
):
909 Either bring ifname up or take it down by setting IFLA_PROTO_DOWN on or off
912 protodown
= 1 if state
== "on" else 0
914 debug
= RTM_NEWLINK
in self
.debug
916 link
= Link(RTM_NEWLINK
, debug
, use_color
=self
.use_color
)
917 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
918 link
.body
= pack('=BxxxiLL', socket
.AF_UNSPEC
, 0, 0, 0)
919 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
920 link
.add_attribute(Link
.IFLA_PROTO_DOWN
, protodown
)
921 link
.build_message(self
.sequence
.next(), self
.pid
)
922 return self
.tx_nlpacket_get_response(link
)
924 def link_set_master(self
, ifname
, master_ifindex
=0, state
=None):
926 ip link set %ifname master %master_ifindex %state
927 use master_ifindex=0 for nomaster
930 if_change
= Link
.IFF_UP
931 if_flags
= Link
.IFF_UP
932 elif state
== 'down':
933 if_change
= Link
.IFF_UP
939 debug
= RTM_NEWLINK
in self
.debug
941 link
= Link(RTM_NEWLINK
, debug
, use_color
=self
.use_color
)
942 link
.flags
= NLM_F_REQUEST | NLM_F_ACK
943 link
.body
= pack('=BxxxiLL', socket
.AF_UNSPEC
, 0, if_flags
, if_change
)
944 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
945 link
.add_attribute(Link
.IFLA_MASTER
, master_ifindex
)
946 link
.build_message(self
.sequence
.next(), self
.pid
)
947 return self
.tx_nlpacket_get_response(link
)
952 def neighbor_add(self
, afi
, ifindex
, ip
, mac
):
953 debug
= RTM_NEWNEIGH
in self
.debug
954 service_hdr_flags
= 0
956 nbr
= Neighbor(RTM_NEWNEIGH
, debug
, use_color
=self
.use_color
)
957 nbr
.flags
= NLM_F_CREATE | NLM_F_REQUEST | NLM_F_ACK
959 nbr
.body
= pack('=BxxxiHBB', afi
, ifindex
, Neighbor
.NUD_REACHABLE
, service_hdr_flags
, Route
.RTN_UNICAST
)
960 nbr
.add_attribute(Neighbor
.NDA_DST
, ip
)
961 nbr
.add_attribute(Neighbor
.NDA_LLADDR
, mac
)
962 nbr
.build_message(self
.sequence
.next(), self
.pid
)
963 return self
.tx_nlpacket_get_response(nbr
)
965 def neighbor_del(self
, afi
, ifindex
, ip
, mac
):
966 debug
= RTM_DELNEIGH
in self
.debug
967 service_hdr_flags
= 0
969 nbr
= Neighbor(RTM_DELNEIGH
, debug
, use_color
=self
.use_color
)
970 nbr
.flags
= NLM_F_REQUEST | NLM_F_ACK
972 nbr
.body
= pack('=BxxxiHBB', afi
, ifindex
, Neighbor
.NUD_REACHABLE
, service_hdr_flags
, Route
.RTN_UNICAST
)
973 nbr
.add_attribute(Neighbor
.NDA_DST
, ip
)
974 nbr
.add_attribute(Neighbor
.NDA_LLADDR
, mac
)
975 nbr
.build_message(self
.sequence
.next(), self
.pid
)
976 return self
.tx_nlpacket_get_response(nbr
)
978 def link_add_vxlan(self
, ifname
, vxlanid
, dstport
=None, local
=None,
979 group
=None, learning
=True, ageing
=None, physdev
=None, ttl
=None):
981 debug
= RTM_NEWLINK
in self
.debug
983 info_data
= {Link
.IFLA_VXLAN_ID
: int(vxlanid
)}
985 info_data
[Link
.IFLA_VXLAN_PORT
] = int(dstport
)
987 info_data
[Link
.IFLA_VXLAN_LOCAL
] = local
989 info_data
[Link
.IFLA_VXLAN_GROUP
] = group
991 info_data
[Link
.IFLA_VXLAN_LEARNING
] = int(learning
)
992 info_data
[Link
.IFLA_VXLAN_TTL
] = ttl
995 info_data
[Link
.IFLA_VXLAN_AGEING
] = int(ageing
)
998 info_data
[Link
.IFLA_VXLAN_LINK
] = int(physdev
)
1000 link
= Link(RTM_NEWLINK
, debug
, use_color
=self
.use_color
)
1001 link
.flags
= NLM_F_CREATE | NLM_F_REQUEST | NLM_F_ACK
1002 link
.body
= pack('Bxxxiii', socket
.AF_UNSPEC
, 0, 0, 0)
1003 link
.add_attribute(Link
.IFLA_IFNAME
, ifname
)
1004 link
.add_attribute(Link
.IFLA_LINKINFO
, {
1005 Link
.IFLA_INFO_KIND
: "vxlan",
1006 Link
.IFLA_INFO_DATA
: info_data
1009 link
.build_message(self
.sequence
.next(), self
.pid
)
1010 return self
.tx_nlpacket_get_response(link
)
1015 def addr_dump(self
):
1017 TODO: add ifname/ifindex filtering:
1018 - via the RTM_GETADDR request packet
1019 - or in python if kernel doesn't support per intf dump
1021 debug
= RTM_GETADDR
in self
.debug
1023 msg
= Address(RTM_GETADDR
, debug
, use_color
=self
.use_color
)
1024 msg
.body
= pack('=Bxxxi', socket
.AF_UNSPEC
, 0)
1025 msg
.flags
= NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP
1027 msg
.build_message(self
.sequence
.next(), self
.pid
)
1028 return self
.tx_nlpacket_get_response(msg
)
1033 def netconf_dump(self
):
1035 The attribute Netconf.NETCONFA_IFINDEX is available but don't let it fool you
1036 it seems like the kernel doesn't really care about this attribute and will dump
1037 everything according of the requested family (AF_UNSPEC for everything).
1038 Device filtering needs to be done afterwards by the user.
1040 debug
= RTM_GETNETCONF
in self
.debug
1041 msg
= Netconf(RTM_GETNETCONF
, debug
, use_color
=self
.use_color
)
1042 msg
.body
= pack('Bxxxiii', socket
.AF_UNSPEC
, 0, 0, 0)
1043 msg
.flags
= NLM_F_REQUEST | NLM_F_DUMP | NLM_F_ACK
1044 msg
.build_message(self
.sequence
.next(), self
.pid
)
1045 return self
.tx_nlpacket_get_response(msg
)