ffho_net.py 40 KB

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  1. #!/usr/bin/python
  2. import collections
  3. import re
  4. from copy import deepcopy
  5. mac_prefix = "f2"
  6. # VRF configuration map
  7. vrf_info = {
  8. 'vrf_external' : {
  9. 'table' : 1023,
  10. 'fwmark' : [ '0x1', '0x1023' ],
  11. },
  12. }
  13. #
  14. # Default parameters added to any given bonding interface,
  15. # if not specified at the interface configuration.
  16. default_bond_config = {
  17. 'bond-mode': '802.3ad',
  18. 'bond-min-links': '1',
  19. 'bond-xmit-hash-policy': 'layer3+4'
  20. }
  21. #
  22. # Default parameters added to any given bonding interface,
  23. # if not specified at the interface configuration.
  24. default_bridge_config = {
  25. 'bridge-fd' : '0',
  26. 'bridge-stp' : 'no'
  27. }
  28. #
  29. # Hop penalty to set if none is explicitly specified
  30. # Check if one of these roles is configured for any given node, use first match.
  31. default_hop_penalty_by_role = {
  32. 'bbr' : 5,
  33. 'bras' : 50,
  34. 'batman_gw' : 5,
  35. 'batman_ext': 50,
  36. }
  37. batman_role_evaluation_order = [ 'bbr', 'batman_gw', 'bras' ]
  38. #
  39. # Default interface attributes to be added to GRE interface to AS201701 when
  40. # not already present in pillar interface configuration.
  41. GRE_FFRL_attrs = {
  42. 'mode' : 'gre',
  43. 'method' : 'tunnel',
  44. 'mtu' : '1400',
  45. 'ttl' : '64',
  46. }
  47. # The IPv4/IPv6 prefix used for Loopback IPs
  48. loopback_prefix = {
  49. 'v4' : '10.132.255.',
  50. 'v6' : '2a03:2260:2342:ffff::',
  51. }
  52. # The DNS zone base names used for generating zone files from IP address
  53. # configured on nodes interfaces.
  54. DNS_zone_names = {
  55. 'forward' : 'ffho.net',
  56. 'rev_v4' : [
  57. '132.10.in-addr.arpa',
  58. '30.172.in-addr.arpa',
  59. ],
  60. 'rev_v6' : [
  61. '2.4.3.2.0.6.2.2.3.0.a.2.ip6.arpa',
  62. ]
  63. }
  64. # MTU configuration
  65. MTU = {
  66. # The default MTU for any interface which does not have a MTU configured
  67. # explicitly in the pillar node config or does not get a MTU configured
  68. # by any means of this SDN stuff here.
  69. 'default' : 1500,
  70. # A batman underlay device, probably a VXLAN or VLAN interface.
  71. #
  72. # 1500
  73. # + 60 B.A.T.M.A.N. adv header + network coding (activated by default by Debian)
  74. 'batman_underlay_iface' : 1560,
  75. # VXLAN underlay device, probably a VLAN within $POP or between two BBRs.
  76. #
  77. # 1560
  78. # + 14 Inner Ethernet Frame
  79. # + 8 VXLAN Header
  80. # + 8 UDP Header
  81. # + 20 IPv4 Header
  82. 'vxlan_underlay_iface' : 1610,
  83. }
  84. ################################################################################
  85. # #
  86. # Internal functions #
  87. # #
  88. # Touching anything below will void any warranty you never had ;) #
  89. # #
  90. ################################################################################
  91. sites = None
  92. def _get_site_no (sites_config, site_name):
  93. global sites
  94. if sites == None:
  95. sites = {}
  96. for site in sites_config:
  97. if site.startswith ("_"):
  98. continue
  99. sites[site] = sites_config[site].get ("site_no", -2)
  100. return sites.get (site_name, -1)
  101. #
  102. # Generate a MAC address after the format f2:dd:dd:ss:nn:nn where
  103. # dd:dd is the hexadecimal reprensentation of the nodes device_id
  104. # ff:ff representing the gluon nodes
  105. #
  106. # ss is the hexadecimal reprensentation of the site_id the interface is connected to
  107. #
  108. # nn:nn is the decimal representation of the network the interface is connected to, with
  109. # 00:00 being the BATMAN interface
  110. # 00:0d being the dummy interface
  111. # 00:0f being the VEth internal side interface
  112. # 00:e0 being an external instance BATMAN interface
  113. # 00:ed being an external instance dummy interface
  114. # 00:e1 being an inter-gw-vpn interface
  115. # 00:e4 being an nodes fastd tunnel interface of IPv4 transport
  116. # 00:e6 being an nodes fastd tunnel interface of IPv6 transport
  117. # 00:ef being an extenral instance VEth interface side
  118. # 02:xx being a connection to local Vlan 2xx
  119. # xx:xx being a VXLAN tunnel for site ss, with xx being the underlay VLAN ID (1xyz, 2xyz)
  120. # ff:ff being the gluon next-node interface
  121. def gen_batman_iface_mac (site_no, device_no, network):
  122. net_type_map = {
  123. 'bat' : "00:00",
  124. 'dummy' : "00:0d",
  125. 'int2ext' : "00:0f",
  126. 'bat-e' : "00:e0",
  127. 'intergw' : "00:e1",
  128. 'nodes4' : "00:e4",
  129. 'nodes6' : "00:e6",
  130. 'dummy-e' : "00:ed",
  131. 'ext2int' : "00:ef",
  132. }
  133. # Well-known network type?
  134. if network in net_type_map:
  135. last = net_type_map[network]
  136. elif type (network) == int:
  137. last = re.sub (r'(\d{2})(\d{2})', '\g<1>:\g<2>', "%04d" % network)
  138. else:
  139. last = "ee:ee"
  140. # Convert device_no to hex, format number to 4 digits with leading zeros and : betwwen 2nd and 3rd digit
  141. device_no_hex = re.sub (r'([0-9a-fA-F]{2})([0-9a-fA-F]{2})', '\g<1>:\g<2>', "%04x" % int (device_no))
  142. # Format site_no to two digit number with leading zero
  143. site_no_hex = "%02d" % int (site_no)
  144. return "%s:%s:%s:%s" % (mac_prefix, device_no_hex, site_no_hex, last)
  145. # Gather B.A.T.M.A.N. related config options for real batman devices (e.g. bat0)
  146. # as well as for batman member interfaces (e.g. eth0.100, fastd ifaces etc.)
  147. def _update_batman_config (node_config, iface, sites_config):
  148. try:
  149. node_batman_hop_penalty = int (node_config['batman']['hop-penalty'])
  150. except KeyError,ValueError:
  151. node_batman_hop_penalty = None
  152. iface_config = node_config['ifaces'][iface]
  153. iface_type = iface_config.get ('type', 'inet')
  154. batman_config = {}
  155. for item, value in iface_config.items ():
  156. if item.startswith ('batman-'):
  157. batman_config[item] = value
  158. iface_config.pop (item)
  159. # B.A.T.M.A.N. device (e.g. bat0)
  160. if iface_type == 'batman':
  161. if 'batman-hop-penalty' not in batman_config:
  162. # If there's a hop penalty set for the node, but not for the interface
  163. # apply the nodes hop penalty
  164. if node_batman_hop_penalty:
  165. batman_config['batman-hop-penalty'] = node_batman_hop_penalty
  166. # If there's no hop penalty set for the node, use a default hop penalty
  167. # for the roles the node might have, if any
  168. else:
  169. node_roles = node_config.get ('roles', [])
  170. for role in batman_role_evaluation_order:
  171. if role in node_roles:
  172. batman_config['batman-hop-penalty'] = default_hop_penalty_by_role[role]
  173. if 'batman_ext' in node_roles and iface.endswith('-ext'):
  174. batman_config['batman-hop-penalty'] = default_hop_penalty_by_role['batman_ext']
  175. # If batman ifaces were specified as a list - which they should -
  176. # generate a sorted list of interface names as string representation
  177. if 'batman-ifaces' in batman_config and type (batman_config['batman-ifaces']) == list:
  178. batman_iface_str = " ".join (sorted (batman_config['batman-ifaces']))
  179. batman_config['batman-ifaces'] = batman_iface_str
  180. # B.A.T.M.A.N. member interface (e.g. eth.100, fastd ifaces, etc.)
  181. elif iface_type == 'batman_iface':
  182. # Generate unique MAC address for every batman iface, as B.A.T.M.A.N.
  183. # will get puzzled with multiple interfaces having the same MAC and
  184. # do nasty things.
  185. site = iface_config.get ('site')
  186. site_no = _get_site_no (sites_config, site)
  187. device_no = node_config.get ('id')
  188. network = 1234
  189. # Generate a unique BATMAN-MAC for this interfaces
  190. match = re.search (r'^vlan(\d+)', iface)
  191. if match:
  192. network = int (match.group (1))
  193. iface_config['hwaddress'] = gen_batman_iface_mac (site_no, device_no, network)
  194. iface_config['batman'] = batman_config
  195. # Mangle bond specific config items with default values and store them in
  196. # separate sub-dict for easier access and configuration.
  197. def _update_bond_config (config):
  198. bond_config = default_bond_config.copy ()
  199. for item, value in config.items ():
  200. if item.startswith ('bond-'):
  201. bond_config[item] = value
  202. config.pop (item)
  203. if bond_config['bond-mode'] not in ['2', 'balance-xor', '4', '802.3ad']:
  204. bond_config.pop ('bond-xmit-hash-policy')
  205. config['bond'] = bond_config
  206. # Mangle bridge specific config items with default values and store them in
  207. # separate sub-dict for easier access and configuration.
  208. def _update_bridge_config (config):
  209. bridge_config = default_bridge_config.copy ()
  210. for item, value in config.items ():
  211. if item.startswith ('bridge-'):
  212. bridge_config[item] = value
  213. config.pop (item)
  214. # Fix and salt mangled string interpretation back to real string.
  215. if type (value) == bool:
  216. bridge_config[item] = "yes" if value else "no"
  217. # If bridge ports were specified as a list - which they should -
  218. # generate a sorted list of interface names as string representation
  219. if 'bridge-ports' in bridge_config and type (bridge_config['bridge-ports']) == list:
  220. bridge_ports_str = " ".join (sorted (bridge_config['bridge-ports']))
  221. bridge_config['bridge-ports'] = bridge_ports_str
  222. config['bridge'] = bridge_config
  223. # Move vlan specific config items into a sub-dict for easier access and pretty-printing
  224. # in the configuration file
  225. def _update_vlan_config (config):
  226. vlan_config = {}
  227. for item, value in config.items ():
  228. if item.startswith ('vlan-'):
  229. vlan_config[item] = value
  230. config.pop (item)
  231. config['vlan'] = vlan_config
  232. # Pimp Veth interfaces
  233. # * Add peer interface name IF not present
  234. # * Add link-type veth IF not present
  235. def _update_veth_config (interface, config):
  236. veth_peer_name = {
  237. 'veth_ext2int' : 'veth_int2ext',
  238. 'veth_int2ext' : 'veth_ext2int'
  239. }
  240. if interface not in veth_peer_name:
  241. return
  242. if 'link-type' not in config:
  243. config['link-type'] = 'veth'
  244. if 'veth-peer-name' not in config:
  245. config['veth-peer-name'] = veth_peer_name[interface]
  246. # The the given MTU to the given interface - presented by it's interface config dict -
  247. # IFF no MTU has already been set in the node pillar.
  248. #
  249. # @param ifaces: All interface configuration (as dict)
  250. # @param iface_name: Name of the interface to set MTU for
  251. # @param mtu: The MTU value to set (integer)
  252. # When <mtu> is <= 0, the <mtu> configured for <iface_name>
  253. # will be used to set the MTU of the upper interface, and the
  254. # default MTU if none is configured explicitly.
  255. def _set_mtu_to_iface_and_upper (ifaces, iface_name, mtu):
  256. iface_config = ifaces.get (iface_name)
  257. # By default we assume that we should set the given MTU value as the 'automtu'
  258. # attribute to allow distinction between manually set and autogenerated MTU
  259. # values.
  260. set_automtu = True
  261. # If a mtu values <= 0 is given, use the MTU configured for this interface
  262. # or, if none is set, the default value when configuring the vlan-raw-device.
  263. if mtu <= 0:
  264. set_automtu = False
  265. mtu = iface_config.get ('mtu', MTU['default'])
  266. # If this interface already has a MTU set - probably because someone manually
  267. # specified one in the node pillar - we do not touch the MTU of this interface.
  268. # Nevertheless it's worth looking at any underlying interface.
  269. if 'mtu' in iface_config:
  270. set_automtu = False
  271. # There might be - read: "we have" - a situation where on top of e.g. bond0
  272. # there are vlans holding VXLAN communicaton as well a vlans directly carrying
  273. # BATMAN traffic. Now depending on which interface is evaluated first, the upper
  274. # MTU is either correct, or maybe to small.
  275. #
  276. # If any former autogenerated MTU is greater-or-equal than the one we want to
  277. # set now, we'll ignore it, and go for the greater one.
  278. elif 'automtu' in iface_config and iface_config['automtu'] >= mtu:
  279. set_automtu = False
  280. # If we still consider this a good move, set given MTU to this device.
  281. if set_automtu:
  282. iface_config['automtu'] = mtu
  283. # If this is a VLAN - which it probably is - fix the MTU of the underlying interface, too.
  284. # Check for 'vlan-raw-device' in iface_config and in vlan subconfig (yeah, that's not ideal).
  285. vlan_raw_device = None
  286. if 'vlan-raw-device' in iface_config:
  287. vlan_raw_device = iface_config['vlan-raw-device']
  288. elif 'vlan' in iface_config and 'vlan-raw-device' in iface_config['vlan']:
  289. vlan_raw_device = iface_config['vlan']['vlan-raw-device']
  290. if vlan_raw_device:
  291. vlan_raw_device_config = ifaces.get (vlan_raw_device, None)
  292. # vlan-raw-device might point to ethX which usually isn't configured explicitly
  293. # as ifupdown2 simply will bring it up anyway by itself. To set the MTU of such
  294. # an interface we have to add a configuration stanza for it here.
  295. if vlan_raw_device_config == None:
  296. vlan_raw_device_config = {}
  297. ifaces[vlan_raw_device] = vlan_raw_device_config
  298. # If there is a manually set MTU for this device, we don't do nothin'
  299. if 'mtu' in vlan_raw_device_config:
  300. return
  301. if 'automtu' in vlan_raw_device_config and vlan_raw_device_config['automtu'] >= mtu:
  302. return
  303. vlan_raw_device_config['automtu'] = mtu
  304. # Generate configuration entries for any batman related interfaces not
  305. # configured explicitly, but asked for implicitly by role batman and a
  306. # (list of) site(s) specified in the node config.
  307. def _generate_batman_interface_config (node_config, ifaces, sites_config):
  308. # No role 'batman', nothing to do
  309. roles = node_config.get ('roles', [])
  310. if 'batman' not in roles:
  311. return
  312. # Should there be a 2nd external BATMAN instance?
  313. batman_ext = 'batman_ext' in roles or 'bras' in roles
  314. device_no = node_config.get ('id', -1)
  315. for site in node_config.get ('sites', []):
  316. site_no = _get_site_no (sites_config, site)
  317. # Predefine interface names for regular/external BATMAN instance
  318. # and possible VEth link pair for connecting both instances.
  319. bat_site_if = "bat-%s" % site
  320. dummy_site_if = "dummy-%s" % site
  321. bat_site_if_ext = "bat-%s-ext" % site
  322. dummy_site_if_ext = "dummy-%s-e" % site
  323. int2ext_site_if = "i2e-%s" % site
  324. ext2int_site_if = "e2i-%s" % site
  325. site_ifaces = {
  326. # Regular BATMAN interface, always present
  327. bat_site_if : {
  328. 'type' : 'batman',
  329. # int2ext_site_if will be added automagically if requred
  330. 'batman-ifaces' : [ dummy_site_if ],
  331. 'batman-ifaces-ignore-regex': '.*_.*',
  332. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'bat'),
  333. },
  334. # Dummy interface always present in regular BATMAN instance
  335. dummy_site_if : {
  336. 'link-type' : 'dummy',
  337. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'dummy'),
  338. 'mtu' : MTU['batman_underlay_iface'],
  339. },
  340. # Optional 2nd "external" BATMAN instance
  341. bat_site_if_ext : {
  342. 'type' : 'batman',
  343. 'batman-ifaces' : [ dummy_site_if_ext, ext2int_site_if ],
  344. 'batman-ifaces-ignore-regex': '.*_.*',
  345. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'bat-e'),
  346. 'ext_only' : True,
  347. },
  348. # Optional dummy interface always present in 2nd "external" BATMAN instance
  349. dummy_site_if_ext : {
  350. 'link-type' : 'dummy',
  351. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'dummy-e'),
  352. 'ext_only' : True,
  353. 'mtu' : MTU['batman_underlay_iface'],
  354. },
  355. # Optional VEth interface pair - internal side
  356. int2ext_site_if : {
  357. 'link-type' : 'veth',
  358. 'veth-peer-name' : ext2int_site_if,
  359. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'int2ext'),
  360. 'mtu' : MTU['batman_underlay_iface'],
  361. 'ext_only' : True,
  362. },
  363. # Optional VEth interface pair - "external" side
  364. ext2int_site_if : {
  365. 'link-type' : 'veth',
  366. 'veth-peer-name' : int2ext_site_if,
  367. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'ext2int'),
  368. 'mtu' : MTU['batman_underlay_iface'],
  369. 'ext_only' : True,
  370. },
  371. }
  372. for iface, iface_config_tmpl in site_ifaces.items ():
  373. # Ignore any interface only relevant when role batman_ext is set
  374. # but it isn't
  375. if not batman_ext and iface_config_tmpl.get ('ext_only', False):
  376. continue
  377. # Remove ext_only key so we don't leak it into ifaces dict
  378. if 'ext_only' in iface_config_tmpl:
  379. del iface_config_tmpl['ext_only']
  380. # If there is no trace of the desired iface config yet...
  381. if iface not in ifaces:
  382. # ... just place our template there.
  383. ifaces[iface] = iface_config_tmpl
  384. # If there should be an 2nd external BATMAN instance make sure
  385. # the internal side of the VEth iface pair is connected to the
  386. # internal BATMAN instance.
  387. if batman_ext and iface == bat_site_if:
  388. iface_config_tmpl['batman-ifaces'].append (int2ext_site_if)
  389. # If there already is an interface configuration try to enhance it with
  390. # meaningful values from our template and force correct hwaddress to be
  391. # used.
  392. else:
  393. iface_config = ifaces[iface]
  394. # Force hwaddress to be what we expect.
  395. if 'hwaddress' in iface_config_tmpl:
  396. iface_config['hwaddress'] = iface_config_tmpl['hwaddress']
  397. # Copy every attribute of the config template missing in iface config
  398. for attr in iface_config_tmpl:
  399. if attr not in iface_config:
  400. iface_config[attr] = iface_config_tmpl[attr]
  401. # Make sure there is a bridge present for every site where a mesh_breakout
  402. # interface should be configured.
  403. for iface, config in ifaces.items ():
  404. iface_type = config.get ('type', 'inet')
  405. if iface_type not in ['mesh_breakout', 'batman_iface']:
  406. continue
  407. site = config.get ('site')
  408. site_bridge = "br-%s" % site
  409. batman_site_if = "bat-%s" % site
  410. if iface_type == 'mesh_breakout':
  411. # If the bridge has already been defined (with an IP maybe) make
  412. # sure that the corresbonding batman device is part of the bridge-
  413. # ports.
  414. if site_bridge in ifaces:
  415. bridge_config = ifaces.get (site_bridge)
  416. # If there already is/are (a) bridge-port(s) defined, add
  417. # the batman and the breakout interfaces if not present...
  418. bridge_ports = bridge_config.get ('bridge-ports', None)
  419. if bridge_ports:
  420. for dev in (batman_site_if, iface):
  421. if not dev in bridge_ports:
  422. if type (bridge_ports) == list:
  423. bridge_ports.append (dev)
  424. else:
  425. bridge_config['bridge-ports'] += ' ' + dev
  426. # ...if there is no bridge-port defined yet, just used
  427. # the batman and breakout iface.
  428. else:
  429. bridge_config['bridge-ports'] = [ iface, batman_site_if ]
  430. # If the bridge isn't present alltogether, add it.
  431. else:
  432. ifaces[site_bridge] = {
  433. 'bridge-ports' : [ iface, batman_site_if ],
  434. }
  435. elif iface_type == 'batman_iface':
  436. batman_ifaces = ifaces[bat_site_if]['batman-ifaces']
  437. if iface not in batman_ifaces:
  438. if type (batman_ifaces) == list:
  439. batman_ifaces.append (iface)
  440. else:
  441. batman_ifaces += ' ' + iface
  442. # Use the MTU configured for this interface or, if none is set,
  443. # the default value for batman underlay iface.
  444. mtu = config.get('mtu', MTU['batman_underlay_iface'])
  445. _set_mtu_to_iface_and_upper (ifaces, iface, mtu)
  446. #
  447. # Generate any implicitly defined VXLAN interfaces defined in the nodes iface
  448. # defined in pillar.
  449. # The keyword "batman_connect_sites" on an interface will trigger the
  450. # generation of a VXLAN overlay interfaces.
  451. def _generate_vxlan_interface_config (node_config, ifaces, sites_config):
  452. # No role 'batman', nothing to do
  453. if 'batman' not in node_config.get ('roles', []):
  454. return
  455. # Sites configured on this node. Nothing to do, if none.
  456. my_sites = node_config.get ('sites', [])
  457. if len (my_sites) == 0:
  458. return
  459. # As we're still here we can now safely assume that a B.A.T.M.A.N.
  460. # device has been configured for every site specified in sites list.
  461. device_no = node_config.get ('id', -1)
  462. for iface, iface_config in ifaces.items ():
  463. batman_connect_sites = iface_config.get ('batman_connect_sites', [])
  464. # If we got a string, convert it to a list with a single element
  465. if type (batman_connect_sites) == str:
  466. batman_connect_sites = [ batman_connect_sites ]
  467. # If there the list of sites to connect is empty, there's nothing to do here.
  468. if len (batman_connect_sites) == 0:
  469. continue
  470. # Set the MTU of this (probably) VLAN device to the MTU required for a VXLAN underlay
  471. # device, where B.A.T.M.A.N. adv. is to be expected within the VXLAN overlay.
  472. _set_mtu_to_iface_and_upper (ifaces, iface, MTU['vxlan_underlay_iface'])
  473. # If the string 'all' is part of the list, blindly use all sites configured for this node
  474. if 'all' in batman_connect_sites:
  475. batman_connect_sites = my_sites
  476. for site in batman_connect_sites:
  477. # Silenty ignore sites not configured on this node
  478. if site not in my_sites:
  479. continue
  480. # iface_name := vx_<last 5 chars of underlay iface>_<site> stripped to 15 chars
  481. vx_iface = ("vx_%s_%s" % (re.sub ('vlan', 'v', iface)[-5:], re.sub (r'[_-]', '', site)))[:15]
  482. site_no = _get_site_no (sites_config, site)
  483. vni = 100 + site_no
  484. bat_iface = "bat-%s" % site
  485. try:
  486. iface_id = int (re.sub ('vlan', '', iface))
  487. # Gather interface specific mcast address.
  488. # The address is derived from the vlan-id of the underlying interface,
  489. # assuming that it in fact is a vlan interface.
  490. # Mangle the vlan-id into two 2 digit values, eliminating any leading zeros.
  491. iface_id_4digit = "%04d" % iface_id
  492. octet2 = int (iface_id_4digit[0:2])
  493. octet3 = int (iface_id_4digit[2:4])
  494. mcast_ip = "225.%s.%s.%s" % (octet2, octet3, site_no)
  495. vni = octet2 * 256 * 256 + octet3 * 256 + site_no
  496. except ValueError:
  497. iface_id = 9999
  498. mcast_ip = "225.0.0.%s" % site_no
  499. vni = site_no
  500. # bail out if VXLAN tunnel already configured
  501. if vx_iface in ifaces:
  502. continue
  503. # If there's no batman interface for this site, there's no point
  504. # in setting up a VXLAN interfaces
  505. if bat_iface not in ifaces:
  506. continue
  507. # Add the VXLAN interface
  508. ifaces[vx_iface] = {
  509. 'vxlan' : {
  510. 'vxlan-id' : vni,
  511. 'vxlan-svcnodeip' : mcast_ip,
  512. 'vxlan-physdev' : iface,
  513. },
  514. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, iface_id),
  515. 'mtu' : MTU['batman_underlay_iface'],
  516. }
  517. # If the batman interface for this site doesn't have any interfaces
  518. # set up - which basicly cannot happen - add this VXLAN tunnel as
  519. # the first in the list.
  520. if not 'batman-ifaces' in ifaces[bat_iface]:
  521. ifaces[bat_iface]['batman-ifaces'] = [ vx_iface ]
  522. continue
  523. # In the hope there already are interfaces for batman set up already
  524. # add this VXLAN tunnel to the list
  525. batman_ifaces = ifaces[bat_iface]['batman-ifaces']
  526. if vx_iface not in batman_ifaces:
  527. if type (batman_ifaces) == list:
  528. batman_ifaces.append (vx_iface)
  529. else:
  530. batman_ifaces += ' ' + vx_iface
  531. #
  532. # Generate implicitly defined VRFs according to the vrf_info dict at the top
  533. # of this file
  534. def _generate_vrfs (ifaces):
  535. for iface, iface_config in ifaces.items ():
  536. vrf = iface_config.get ('vrf', None)
  537. if vrf and vrf not in ifaces:
  538. conf = vrf_info.get (vrf, {})
  539. table = conf.get ('table', 1234)
  540. fwmark = conf.get ('fwmark', None)
  541. ifaces[vrf] = {
  542. 'vrf-table' : table,
  543. }
  544. # Create ip rule's for any fwmarks defined
  545. if fwmark:
  546. up = []
  547. # Make sure we are dealing with a list even if there is only one mark to be set up
  548. if type (fwmark) in (str, int):
  549. fwmark = [ fwmark ]
  550. # Create ip rule entries for IPv4 and IPv6 for every fwmark
  551. for mark in fwmark:
  552. up.append ("ip rule add fwmark %s table %s" % (mark, table))
  553. up.append ("ip -6 rule add fwmark %s table %s" % (mark, table))
  554. ifaces[vrf]['up'] = up
  555. def _generate_ffrl_gre_tunnels (ifaces):
  556. for iface, iface_config in ifaces.items ():
  557. # We only care for GRE_FFRL type interfaces
  558. if iface_config.get ('type', '') != 'GRE_FFRL':
  559. continue
  560. # Copy default values to interface config
  561. for attr, val in GRE_FFRL_attrs.items ():
  562. if not attr in iface_config:
  563. iface_config[attr] = val
  564. # Guesstimate local IPv4 tunnel endpoint address from tunnel-physdev
  565. if not 'local' in iface_config and 'tunnel-physdev' in iface_config:
  566. try:
  567. physdev_prefixes = [p.split ('/')[0] for p in ifaces[iface_config['tunnel-physdev']]['prefixes'] if '.' in p]
  568. if len (physdev_prefixes) == 1:
  569. iface_config['local'] = physdev_prefixes[0]
  570. except KeyError:
  571. pass
  572. def _generate_loopback_ips (ifaces, node_config, node_id):
  573. v4_ip = "%s/32" % get_loopback_ip (node_config, node_id, 'v4')
  574. v6_ip = "%s/128" % get_loopback_ip (node_config, node_id, 'v6')
  575. # Interface lo already present?
  576. if 'lo' not in ifaces:
  577. ifaces['lo'] = { 'prefixes' : [] }
  578. # Add 'prefixes' list if not present
  579. if 'prefixes' not in ifaces['lo']:
  580. ifaces['lo']['prefixes'] = []
  581. prefixes = ifaces['lo']['prefixes']
  582. if v4_ip not in prefixes:
  583. prefixes.append (v4_ip)
  584. if v6_ip not in prefixes:
  585. prefixes.append (v6_ip)
  586. # Generate interface descriptions / aliases for auto generated or manually
  587. # created interfaces. Currently this only is done for bridges associated
  588. # with BATMAN instanzes.
  589. #
  590. # @param node_config: The configuration of the given node (as dict)
  591. # @param sites_config Global sites configuration (as dict)
  592. def _update_interface_desc (node_config, sites_config):
  593. # Currently we only care for nodes with batman role.
  594. if 'batman' not in node_config.get ('roles', []):
  595. return
  596. for iface, iface_config in node_config.get ('ifaces', {}).items ():
  597. if 'desc' in sites_config:
  598. continue
  599. # If the interface name looks like a bridge for a BATMAN instance
  600. # try to get the name of the corresponding site
  601. match = re.search (r'^br-([a-z_-]+)$', iface)
  602. if match and match.group (1) in sites_config:
  603. try:
  604. iface_config['desc'] = sites_config[match.group (1)]['name']
  605. except KeyError:
  606. pass
  607. ################################################################################
  608. # Public functions #
  609. ################################################################################
  610. # Generate network interface configuration for given node.
  611. #
  612. # This function will read the network configuration from pillar and will
  613. # * enhance it with all default values configured at the top this file
  614. # * auto generate any implicitly configured
  615. # * VRFs
  616. # * B.A.T.M.A.N. instances and interfaces
  617. # * VXLAN interfaces to connect B.A.T.M.A.N. sites
  618. # * Loopback IPs derived from numeric node ID
  619. #
  620. # @param: node_config Pillar node configuration (as dict)
  621. # @param: sites_config Pillar sites configuration (as dict)
  622. # @param: node_id Minion name / Pillar node configuration key
  623. def get_interface_config (node_config, sites_config, node_id = ""):
  624. # Make a copy of the node_config dictionary to suppress side-effects.
  625. # This function deletes some keys from the node_config which will break
  626. # any re-run of this function or other functions relying on the node_config
  627. # to be complete.
  628. node_config = deepcopy (node_config)
  629. # Get config of this node and dict of all configured ifaces
  630. ifaces = node_config.get ('ifaces', {})
  631. # Generate configuration entries for any batman related interfaces not
  632. # configured explicitly, but asked for implicitly by role <batman> and
  633. # a (list of) site(s) specified in the node config.
  634. _generate_batman_interface_config (node_config, ifaces, sites_config)
  635. # Generate VXLAN tunnels for every interfaces specifying 'batman_connect_sites'
  636. _generate_vxlan_interface_config (node_config, ifaces, sites_config)
  637. # Enhance ifaces configuration with some meaningful defaults for
  638. # bonding, bridge and vlan interfaces, MAC address for batman ifaces, etc.
  639. for interface, config in ifaces.items ():
  640. # if type (config) not in [ dict, collections.OrderedDict ]:
  641. # raise Exception ("Configuration for interface %s on node %s seems broken: Type %s" % (interface, node_id, type (config)))
  642. iface_type = config.get ('type', 'inet')
  643. if 'batman-ifaces' in config or iface_type.startswith ('batman'):
  644. _update_batman_config (node_config, interface, sites_config)
  645. if 'bond-slaves' in config:
  646. _update_bond_config (config)
  647. # FIXME: This maybe will not match on bridges without any member ports configured!
  648. if 'bridge-ports' in config or interface.startswith ('br-'):
  649. _update_bridge_config (config)
  650. if 'vlan-raw-device' in config or 'vlan-id' in config:
  651. _update_vlan_config (config)
  652. _set_mtu_to_iface_and_upper (ifaces, interface, 0)
  653. # Pimp configuration for VEth link pairs
  654. if interface.startswith ('veth_'):
  655. _update_veth_config (interface, config)
  656. # Auto generate Loopback IPs IFF not present
  657. _generate_loopback_ips (ifaces, node_config, node_id)
  658. # Auto generated VRF devices for any VRF found in ifaces and not already configured.
  659. _generate_vrfs (ifaces)
  660. # Pimp GRE_FFRL type inteface configuration with default values
  661. _generate_ffrl_gre_tunnels (ifaces)
  662. # Drop any config parameters used in node interface configuration not
  663. # relevant anymore for config file generation.
  664. for interface, config in ifaces.items ():
  665. # Set default MTU if not already set manually or by any earlier function
  666. if interface != 'lo' and ('mtu' not in config):
  667. # Set the MTU value of this interface to the autogenerated value (if any)
  668. # or set the default, when no automtu is present.
  669. config['mtu'] = config.get ('automtu', MTU['default'])
  670. for key in [ 'automtu', 'batman_connect_sites', 'ospf', 'site', 'type' ]:
  671. if key in config:
  672. config.pop (key)
  673. # This leaves 'auto', 'prefixes' and 'desc' as keys which should not be directly
  674. # printed into the remaining configuration. These are handled within the jinja
  675. # interface template.
  676. # Generate meaningful interface descriptions / aliases where useful
  677. _update_interface_desc (node_config, sites_config)
  678. return ifaces
  679. # Generate entries for /etc/bat-hosts for every batman interface we will configure on any node.
  680. # For readability purposes superflous/redundant information is being stripped/supressed.
  681. # As these names will only show up in batctl calls with a specific site, site_names in interfaces
  682. # are stripped. Dummy interfaces are stripped as well.
  683. def gen_bat_hosts (nodes_config, sites_config):
  684. bat_hosts = {}
  685. for node_id in sorted (nodes_config.keys ()):
  686. node_config = nodes_config.get (node_id)
  687. node_name = node_id.split ('.')[0]
  688. ifaces = get_interface_config (node_config, sites_config, node_id)
  689. for iface in sorted (ifaces):
  690. iface_config = ifaces.get (iface)
  691. hwaddress = iface_config.get ('hwaddress', None)
  692. if hwaddress == None:
  693. continue
  694. entry_name = node_name
  695. match = re.search (r'^dummy-(.+)(-e)?$', iface)
  696. if match:
  697. if match.group (2):
  698. entry_name += "-e"
  699. # Append site to make name unique
  700. entry_name += "/%s" % match.group (1)
  701. else:
  702. entry_name += "/%s" % re.sub (r'^(vx_.*|i2e|e2i)[_-](.*)$', '\g<1>/\g<2>', iface)
  703. bat_hosts[hwaddress] = entry_name
  704. if 'fastd' in node_config.get ('roles', []):
  705. device_no = node_config.get ('id')
  706. for site in node_config.get ('sites', []):
  707. site_no = _get_site_no (sites_config, site)
  708. for network in ('intergw', 'nodes4', 'nodes6'):
  709. hwaddress = gen_batman_iface_mac (site_no, device_no, network)
  710. bat_hosts[hwaddress] = "%s/%s/%s" % (node_name, network, site)
  711. return bat_hosts
  712. # Generate eBGP session parameters for FFRL Transit from nodes pillar information.
  713. def get_ffrl_bgp_config (ifaces, proto):
  714. from ipcalc import IP
  715. _generate_ffrl_gre_tunnels (ifaces)
  716. sessions = {}
  717. for iface in sorted (ifaces):
  718. # We only care for GRE tunnels to the FFRL Backbone
  719. if not iface.startswith ('gre_ffrl_'):
  720. continue
  721. iface_config = ifaces.get (iface)
  722. # Search for IPv4/IPv6 prefix as defined by proto parameter
  723. local = None
  724. neighbor = None
  725. for prefix in iface_config.get ('prefixes', []):
  726. if (proto == 'v4' and '.' in prefix) or (proto == 'v6' and ':' in prefix):
  727. local = prefix.split ('/')[0]
  728. # Calculate neighbor IP as <local IP> - 1
  729. if proto == 'v4':
  730. neighbor = str (IP (int (IP (local)) - 1, version = 4))
  731. else:
  732. neighbor = str (IP (int (IP (local)) - 1, version = 6))
  733. break
  734. # Strip gre_ prefix iface name and use it as identifier for the eBGP session.
  735. name = re.sub ('gre_ffrl_', 'ffrl_', iface)
  736. sessions[name] = {
  737. 'local' : local,
  738. 'neighbor' : neighbor,
  739. 'bgp_local_pref' : iface_config.get ('bgp_local_pref', None),
  740. }
  741. return sessions
  742. # Get list of IP address configured on given interface on given node.
  743. #
  744. # @param: node_config Pillar node configuration (as dict)
  745. # @param: iface_name Name of the interface defined in pillar node config
  746. # OR name of VRF ("vrf_<something>") whichs ifaces are
  747. # to be examined.
  748. # @param: with_mask Don't strip the netmask from the prefix. (Default false)
  749. def get_node_iface_ips (node_config, iface_name, with_mask = False):
  750. ips = {
  751. 'v4' : [],
  752. 'v6' : [],
  753. }
  754. ifaces = node_config.get ('ifaces', {})
  755. ifaces_names = [ iface_name ]
  756. if iface_name.startswith ('vrf_'):
  757. # Reset list of ifaces_names to consider
  758. ifaces_names = []
  759. vrf = iface_name
  760. for iface, iface_config in ifaces.items ():
  761. # Ignore any iface NOT in the given VRF
  762. if iface_config.get ('vrf', None) != vrf:
  763. continue
  764. # Ignore any VEth pairs
  765. if iface.startswith ('veth'):
  766. continue
  767. ifaces_names.append (iface)
  768. try:
  769. for iface in ifaces_names:
  770. for prefix in ifaces[iface]['prefixes']:
  771. ip_ver = 'v6' if ':' in prefix else 'v4'
  772. if not with_mask:
  773. prefix = prefix.split ('/')[0]
  774. ips[ip_ver].append (prefix)
  775. except KeyError:
  776. pass
  777. return ips
  778. #
  779. # Get the lookback IP of the given node for the given proto
  780. #
  781. # @param node_config: Pillar node configuration (as dict)
  782. # @param node_id: Minion name / Pillar node configuration key
  783. # @param proto: { 'v4', 'v6' }
  784. def get_loopback_ip (node_config, node_id, proto):
  785. if proto not in [ 'v4', 'v6' ]:
  786. raise Exception ("get_loopback_ip(): Invalid proto: \"%s\"." % proto)
  787. if not proto in loopback_prefix:
  788. raise Exception ("get_loopback_ip(): No loopback_prefix configured for IP%s in ffno_net module!" % proto)
  789. if not 'id' in node_config:
  790. raise Exception ("get_loopback_ip(): No 'id' configured in pillar for node \"%s\"!" % node_id)
  791. # Every rule has an exception.
  792. # If there is a loopback_overwrite configuration for this node, use this instead of
  793. # the generated IPs.
  794. if 'loopback_override' in node_config:
  795. if proto not in node_config['loopback_override']:
  796. raise Exception ("get_loopback_ip(): No loopback_prefix configured for IP%s in node config / loopback_override!" % proto)
  797. return node_config['loopback_override'][proto]
  798. return "%s%s" % (loopback_prefix.get (proto), node_config.get ('id'))
  799. #
  800. # Get the router id (read: IPv4 Lo-IP) out of the given node config.
  801. def get_router_id (node_config, node_id):
  802. return get_loopback_ip (node_config, node_id, 'v4')
  803. # Compute minions OSPF interface configuration according to FFHO routing policy
  804. # See https://wiki.ffho.net/infrastruktur:vlans for information about Vlans
  805. def get_ospf_interface_config (node_config, grains_id):
  806. ospf_node_config = node_config.get ('ospf', {})
  807. ospf_interfaces = {}
  808. for iface, iface_config in node_config.get ('ifaces', {}).items ():
  809. # By default we don't speak OSPF on interfaces
  810. ospf_on = False
  811. # Defaults for OSPF interfaces
  812. ospf_config = {
  813. 'stub' : True, # Active/Passive interface
  814. 'cost' : 12345,
  815. # 'type' # Area type
  816. }
  817. # OSPF configuration for interface given?
  818. ospf_config_pillar = iface_config.get ('ospf', {})
  819. # Local Gigabit Ethernet based connections (PTP or L2 subnets), cost 10
  820. if re.search (r'^(br-?|br\d+\.|vlan)10\d\d$', iface):
  821. ospf_on = True
  822. ospf_config['stub'] = False
  823. ospf_config['cost'] = 10
  824. ospf_config['desc'] = "Wired Gigabit connection"
  825. # AF-X based WBBL connection
  826. elif re.search (r'^vlan20\d\d$', iface):
  827. ospf_on = True
  828. ospf_config['stub'] = False
  829. ospf_config['cost'] = 100
  830. ospf_config['desc'] = "AF-X based WBBL connection"
  831. # Non-AF-X based WBBL connection
  832. elif re.search (r'^vlan22\d\d$', iface):
  833. ospf_on = True
  834. ospf_config['stub'] = False
  835. ospf_config['cost'] = 1000
  836. ospf_config['desc'] = "Non-AF-X based WBBL connection"
  837. # Management Vlans
  838. elif re.search (r'^vlan30\d\d$', iface):
  839. ospf_on = True
  840. ospf_config['stub'] = True
  841. ospf_config['cost'] = 10
  842. # OPS Vlans
  843. elif re.search (r'^vlan39\d\d$', iface):
  844. ospf_on = True
  845. ospf_config['stub'] = True
  846. ospf_config['cost'] = 10
  847. # Active OSPF on OpenVPN tunnels, cost 10000
  848. elif iface.startswith ('ovpn-'):
  849. ospf_on = True
  850. ospf_config['stub'] = False
  851. ospf_config['cost'] = 10000
  852. # Inter-Core links should have cost 5000
  853. if iface.startswith ('ovpn-cr') and grains_id.startswith ('cr'):
  854. ospf_config['cost'] = 5000
  855. # OpenVPN tunnels to EdgeRouters
  856. elif iface.startswith ('ovpn-er-'):
  857. ospf_config['type'] = 'broadcast'
  858. # Configure Out-of-band OpenVPN tunnels as stub interfaces,
  859. # so recursive next-hop lookups for OOB-BGP-session will work.
  860. elif iface.startswith ('oob-'):
  861. ospf_on = True
  862. ospf_config['stub'] = True
  863. ospf_config['cost'] = 1000
  864. # OSPF explicitly enabled for interface
  865. elif 'ospf' in iface_config:
  866. ospf_on = True
  867. # iface ospf parameters will be applied later
  868. # Go on if OSPF should not be actived
  869. if not ospf_on:
  870. continue
  871. # Explicit OSPF interface configuration parameters take precendence over generated ones
  872. for attr, val in ospf_config_pillar.items ():
  873. ospf_config[attr] = val
  874. # Convert boolean values to 'yes' / 'no' string values
  875. for attr, val in ospf_config.items ():
  876. if type (val) == bool:
  877. ospf_config[attr] = 'yes' if val else 'no'
  878. # Store interface configuration
  879. ospf_interfaces[iface] = ospf_config
  880. return ospf_interfaces
  881. # Return (possibly empty) subset of Traffic Engineering entries from 'te' pillar entry
  882. # relevenant for this minion and protocol (IPv4 / IPv6)
  883. def get_te_prefixes (te_node_config, grains_id, proto):
  884. te_config = {}
  885. for prefix, prefix_config in te_node_config.get ('prefixes', {}).items ():
  886. prefix_proto = 'v6' if ':' in prefix else 'v4'
  887. # Should this TE policy be applied on this node and is the prefix
  888. # of the proto we are looking for?
  889. if grains_id in prefix_config.get ('nodes', []) and prefix_proto == proto:
  890. te_config[prefix] = prefix_config
  891. return te_config
  892. def generate_DNS_entries (nodes_config, sites_config):
  893. import ipaddress
  894. forward_zone_name = ""
  895. forward_zone = []
  896. zones = {
  897. # <forward_zone_name>: [],
  898. # <rev_zone1_name>: [],
  899. # <rev_zone2_name>: [],
  900. # ...
  901. }
  902. # Fill zones dict with zones configured in DNS_zone_names at the top of this file.
  903. # Make sure the zone base names provided start with a leading . so the string
  904. # operations later can be done easily and safely. Proceed with fingers crossed.
  905. for entry, value in DNS_zone_names.items ():
  906. if entry == "forward":
  907. zone = value
  908. if not zone.startswith ('.'):
  909. zone = ".%s" % zone
  910. zones[zone] = forward_zone
  911. forward_zone_name = zone
  912. if entry in [ 'rev_v4', 'rev_v6' ]:
  913. for zone in value:
  914. if not zone.startswith ('.'):
  915. zone = ".%s" % zone
  916. zones[zone] = []
  917. # Process all interfaace of all nodes defined in pillar and generate forward
  918. # and reverse entries for all zones defined in DNS_zone_names. Automagically
  919. # put reverse entries into correct zone.
  920. for node_id in sorted (nodes_config):
  921. node_config = nodes_config.get (node_id)
  922. ifaces = get_interface_config (node_config, sites_config, node_id)
  923. for iface in sorted (ifaces):
  924. iface_config = ifaces.get (iface)
  925. # We only care for interfaces with IPs configured
  926. prefixes = iface_config.get ("prefixes", None)
  927. if prefixes == None:
  928. continue
  929. # Ignore any interface in $VRF
  930. if iface_config.get ('vrf', "") in [ 'vrf_external' ]:
  931. continue
  932. for prefix in sorted (prefixes):
  933. ip = ipaddress.ip_address (u'%s' % prefix.split ('/')[0])
  934. proto = 'v%s' % ip.version
  935. # The entry name is
  936. # <node_id> when interface 'lo'
  937. # <node_name>.srv.<residual> when interface 'srv' (or magically detected internal srv record)
  938. # <interface>.<node_id> else
  939. entry_name = node_id
  940. if iface != "lo":
  941. entry_name = "%s.%s" % (iface, node_id)
  942. elif iface == 'srv' or re.search (r'^(10.132.251|2a03:2260:2342:f251:)', prefix):
  943. entry_name = re.sub (r'^([^.]+)\.(.+)$', r'\g<1>.srv.\g<2>', entry_name)
  944. # Strip forward zone name from entry_name and store forward entry
  945. # with correct entry type for found IP address.
  946. forward_entry_name = re.sub (forward_zone_name, "", entry_name)
  947. forward_entry_name = re.sub (forward_zone_name, "", entry_name)
  948. forward_entry_typ = "A" if ip.version == 4 else "AAAA"
  949. forward_zone.append ("%s IN %s %s" % (forward_entry_name, forward_entry_typ, ip))
  950. # Find correct reverse zone, if configured and strip reverse zone name
  951. # from calculated reverse pointer name. Store reverse entry if we found
  952. # a zone for it. If no configured reverse zone did match, this reverse
  953. # entry will be ignored.
  954. for zone in zones:
  955. if ip.reverse_pointer.find (zone) > 0:
  956. PTR_entry = re.sub (zone, "", ip.reverse_pointer)
  957. zones[zone].append ("%s IN PTR %s." % (PTR_entry, entry_name))
  958. break
  959. return zones
  960. # Convert the CIDR network from the given prefix into a dotted netmask
  961. def cidr_to_dotted_mask (prefix):
  962. from ipcalc import Network
  963. return str (Network (prefix).netmask ())
  964. def is_subprefix (prefix, subprefix):
  965. from ipcalc import Network
  966. return subprefix in Network(prefix)
  967. # Return the network address of the given prefix
  968. def get_network_address (prefix, with_prefixlen = False):
  969. from ipaddress import ip_network
  970. net_h = ip_network (u'%s' % prefix, strict = False)
  971. network = str (net_h.network_address)
  972. if with_prefixlen:
  973. network += "/%s" % net_h.prefixlen
  974. return network