ffho_net.py 35 KB

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  1. #!/usr/bin/python
  2. import collections
  3. import re
  4. mac_prefix = "f2"
  5. # VRF configuration map
  6. vrf_info = {
  7. 'vrf_external' : {
  8. 'table' : 1023,
  9. 'fwmark' : [ '0x1', '0x1023' ],
  10. },
  11. }
  12. #
  13. # Default parameters added to any given bonding interface,
  14. # if not specified at the interface configuration.
  15. default_bond_config = {
  16. 'bond-mode': '802.3ad',
  17. 'bond-min-links': '1',
  18. 'bond-xmit-hash-policy': 'layer3+4'
  19. }
  20. #
  21. # Default parameters added to any given bonding interface,
  22. # if not specified at the interface configuration.
  23. default_bridge_config = {
  24. 'bridge-fd' : '0',
  25. 'bridge-stp' : 'no'
  26. }
  27. #
  28. # Hop penalty to set if none is explicitly specified
  29. # Check if one of these roles is configured for any given node, use first match.
  30. default_hop_penalty_by_role = {
  31. 'bbr' : 5,
  32. 'bras' : 50,
  33. 'batman_gw' : 50,
  34. }
  35. batman_role_evaluation_order = [ 'bbr', 'batman_gw', 'bras' ]
  36. #
  37. # Default interface attributes to be added to GRE interface to AS201701 when
  38. # not already present in pillar interface configuration.
  39. GRE_FFRL_attrs = {
  40. 'mode' : 'gre',
  41. 'method' : 'tunnel',
  42. 'mtu' : '1400',
  43. 'ttl' : '64',
  44. }
  45. # The IPv4/IPv6 prefix use for Loopback IPs
  46. loopback_prefix = {
  47. 'v4' : '10.132.255.',
  48. 'v6' : '2a03:2260:2342:ffff::',
  49. }
  50. # The DNS zone base names used for generating zone files from IP address
  51. # configured on nodes interfaces.
  52. DNS_zone_names = {
  53. 'forward' : 'ffho.net',
  54. 'rev_v4' : [
  55. '132.10.in-addr.arpa',
  56. '30.172.in-addr.arpa',
  57. ],
  58. 'rev_v6' : [
  59. '2.4.3.2.0.6.2.2.3.0.a.2.ip6.arpa',
  60. ]
  61. }
  62. # MTU configuration
  63. MTU = {
  64. # The default MTU for any interface which does not have a MTU configured
  65. # explicitly in the pillar node config or does not get a MTU configured
  66. # by any means of this SDN stuff here.
  67. 'default' : 1500,
  68. # A batman underlay device, probably a VXLAN or VLAN interface.
  69. #
  70. # 1500
  71. # + 60 B.A.T.M.A.N. adv header + network coding (activated by default by Debian)
  72. 'batman_underlay_iface' : 1560,
  73. # VXLAN underlay device, probably a VLAN with $POP or between two BBRs.
  74. #
  75. # 1560
  76. # + 14 Inner Ethernet Frame
  77. # + 8 VXLAN Header
  78. # + 8 UDP Header
  79. # + 20 IPv4 Header
  80. 'vxlan_underlay_iface' : 1610,
  81. }
  82. ################################################################################
  83. # Internal functions #
  84. # #
  85. # Touching anything below will void any warranty you never had ;) #
  86. # #
  87. ################################################################################
  88. sites = None
  89. def _get_site_no (sites_config, site_name):
  90. global sites
  91. if sites == None:
  92. sites = {}
  93. for site in sites_config:
  94. if site.startswith ("_"):
  95. continue
  96. sites[site] = sites_config[site].get ("site_no", -2)
  97. return sites.get (site_name, -1)
  98. #
  99. # Generate a MAC address after the format f2:dd:dd:ss:nn:nn where
  100. # dd:dd is the hexadecimal reprensentation of the nodes device_id
  101. # ff:ff representing the gluon nodes
  102. #
  103. # ss is the hexadecimal reprensentation of the site_id the interface is connected to
  104. #
  105. # nn:nn is the decimal representation of the network the interface is connected to, with
  106. # 00:00 being the dummy interface
  107. # 00:0f being the VEth internal side interface
  108. # 00:e0 being an external instance dummy interface
  109. # 00:e1 being an inter-gw-vpn interface
  110. # 00:e4 being an nodes fastd tunnel interface of IPv4 transport
  111. # 00:e6 being an nodes fastd tunnel interface of IPv6 transport
  112. # 00:ef being an extenral instance VEth interface side
  113. # 02:xx being a connection to local Vlan 2xx
  114. # 1b:24 being the ibss 2.4GHz bssid
  115. # 1b:05 being the ibss 5GHz bssid
  116. # xx:xx being a VXLAN tunnel for site ss, with xx being a the underlay VLAN ID (1xyz, 2xyz)
  117. # ff:ff being the gluon next-node interface
  118. def gen_batman_iface_mac (site_no, device_no, network):
  119. net_type_map = {
  120. 'dummy' : "00:00",
  121. 'int2ext' : "00:0f",
  122. 'dummy-e' : "00:e0",
  123. 'intergw' : "00:e1",
  124. 'nodes4' : "00:e4",
  125. 'nodes6' : "00:e6",
  126. 'ext2int' : "00:ef",
  127. }
  128. # Well-known network type?
  129. if network in net_type_map:
  130. last = net_type_map[network]
  131. elif type (network) == int:
  132. last = re.sub (r'(\d{2})(\d{2})', '\g<1>:\g<2>', "%04d" % network)
  133. else:
  134. last = "ee:ee"
  135. # Convert device_no to hex, format number to 4 digits with leading zeros and : betwwen 2nd and 3rd digit
  136. device_no_hex = re.sub (r'([0-9a-fA-F]{2})([0-9a-fA-F]{2})', '\g<1>:\g<2>', "%04x" % int (device_no))
  137. # Format site_no to two digit number with leading zero
  138. site_no_hex = "%02d" % int (site_no)
  139. return "%s:%s:%s:%s" % (mac_prefix, device_no_hex, site_no_hex, last)
  140. # Gather B.A.T.M.A.N. related config options for real batman devices (e.g. bat0)
  141. # as well as for batman member interfaces (e.g. eth0.100, fastd ifaces etc.)
  142. def _update_batman_config (node_config, iface, sites_config):
  143. try:
  144. node_batman_hop_penalty = int (node_config['batman']['hop-penalty'])
  145. except KeyError,ValueError:
  146. node_batman_hop_penalty = None
  147. iface_config = node_config['ifaces'][iface]
  148. iface_type = iface_config.get ('type', 'inet')
  149. batman_config = {}
  150. for item, value in iface_config.items ():
  151. if item.startswith ('batman-'):
  152. batman_config[item] = value
  153. iface_config.pop (item)
  154. # B.A.T.M.A.N. device (e.g. bat0)
  155. if iface_type == 'batman':
  156. if 'batman-hop-penalty' not in batman_config:
  157. # If there's a hop penalty set for the node, but not for the interface
  158. # apply the nodes hop penalty
  159. if node_batman_hop_penalty:
  160. batman_config['batman-hop-penalty'] = node_batman_hop_penalty
  161. # If there's no hop penalty set for the node, use a default hop penalty
  162. # for the roles the node might have, if any
  163. else:
  164. node_roles = node_config.get ('roles', [])
  165. for role in batman_role_evaluation_order:
  166. if role in node_roles:
  167. batman_config['batman-hop-penalty'] = default_hop_penalty_by_role[role]
  168. # If batman ifaces were specified as a list - which they should -
  169. # generate a sorted list of interface names as string representation
  170. if 'batman-ifaces' in batman_config and type (batman_config['batman-ifaces']) == list:
  171. batman_iface_str = " ".join (sorted (batman_config['batman-ifaces']))
  172. batman_config['batman-ifaces'] = batman_iface_str
  173. # B.A.T.M.A.N. member interface (e.g. eth.100, fastd ifaces, etc.)
  174. elif iface_type == 'batman_iface':
  175. # Generate unique MAC address for every batman iface, as B.A.T.M.A.N.
  176. # will get puzzled with multiple interfaces having the same MAC and
  177. # do nasty things.
  178. site = iface_config.get ('site')
  179. site_no = _get_site_no (sites_config, site)
  180. device_no = node_config.get ('id')
  181. network = 1234
  182. # Generate a unique BATMAN-MAC for this interfaces
  183. match = re.search (r'^vlan(\d+)', iface)
  184. if match:
  185. network = int (match.group (1))
  186. iface_config['hwaddress'] = gen_batman_iface_mac (site_no, device_no, network)
  187. iface_config['batman'] = batman_config
  188. # Mangle bond specific config items with default values and store them in
  189. # separate sub-dict for easier access and configuration.
  190. def _update_bond_config (config):
  191. bond_config = default_bond_config.copy ()
  192. for item, value in config.items ():
  193. if item.startswith ('bond-'):
  194. bond_config[item] = value
  195. config.pop (item)
  196. if bond_config['bond-mode'] not in ['2', 'balance-xor', '4', '802.3ad']:
  197. bond_config.pop ('bond-xmit-hash-policy')
  198. config['bond'] = bond_config
  199. # Mangle bridge specific config items with default values and store them in
  200. # separate sub-dict for easier access and configuration.
  201. def _update_bridge_config (config):
  202. bridge_config = default_bridge_config.copy ()
  203. for item, value in config.items ():
  204. if item.startswith ('bridge-'):
  205. bridge_config[item] = value
  206. config.pop (item)
  207. # Fix and salt mangled string interpretation back to real string.
  208. if type (value) == bool:
  209. bridge_config[item] = "yes" if value else "no"
  210. # If bridge ports were specified as a list - which they should -
  211. # generate a sorted list of interface names as string representation
  212. if 'bridge-ports' in bridge_config and type (bridge_config['bridge-ports']) == list:
  213. bridge_ports_str = " ".join (sorted (bridge_config['bridge-ports']))
  214. bridge_config['bridge-ports'] = bridge_ports_str
  215. config['bridge'] = bridge_config
  216. # Move vlan specific config items into a sub-dict for easier access and pretty-printing
  217. # in the configuration file
  218. def _update_vlan_config (config):
  219. vlan_config = {}
  220. for item, value in config.items ():
  221. if item.startswith ('vlan-'):
  222. vlan_config[item] = value
  223. config.pop (item)
  224. config['vlan'] = vlan_config
  225. # Pimp Veth interfaces
  226. # * Add peer interface name IF not present
  227. # * Add link-type veth IF not present
  228. def _update_veth_config (interface, config):
  229. veth_peer_name = {
  230. 'veth_ext2int' : 'veth_int2ext',
  231. 'veth_int2ext' : 'veth_ext2int'
  232. }
  233. if interface not in veth_peer_name:
  234. return
  235. if 'link-type' not in config:
  236. config['link-type'] = 'veth'
  237. if 'veth-peer-name' not in config:
  238. config['veth-peer-name'] = veth_peer_name[interface]
  239. # Generate configuration entries for any batman related interfaces not
  240. # configured explicitly, but asked for implicitly by role batman and a
  241. # (list of) site(s) specified in the node config.
  242. def _generate_batman_interface_config (node_config, ifaces, sites_config):
  243. # No role 'batman', nothing to do
  244. roles = node_config.get ('roles', [])
  245. if 'batman' not in roles:
  246. return
  247. # Should there be a 2nd external BATMAN instance?
  248. batman_ext = 'batman_ext' in roles or 'bras' in roles
  249. device_no = node_config.get ('id', -1)
  250. for site in node_config.get ('sites', []):
  251. site_no = _get_site_no (sites_config, site)
  252. # Predefine interface names for regular/external BATMAN instance
  253. # and possible VEth link pair for connecting both instances.
  254. bat_site_if = "bat-%s" % site
  255. dummy_site_if = "dummy-%s" % site
  256. bat_site_if_ext = "bat-%s-ext" % site
  257. dummy_site_if_ext = "dummy-%s-e" % site
  258. int2ext_site_if = "i2e-%s" % site
  259. ext2int_site_if = "e2i-%s" % site
  260. site_ifaces = {
  261. # Regular BATMAN interface, always present
  262. bat_site_if : {
  263. 'type' : 'batman',
  264. # int2ext_site_if will be added automagically if requred
  265. 'batman-ifaces' : [ dummy_site_if ],
  266. 'batman-ifaces-ignore-regex': '.*_.*',
  267. },
  268. # Dummy interface always present in regular BATMAN instance
  269. dummy_site_if : {
  270. 'link-type' : 'dummy',
  271. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'dummy'),
  272. 'mtu' : MTU['batman_underlay_iface'],
  273. },
  274. # Optional 2nd "external" BATMAN instance
  275. bat_site_if_ext : {
  276. 'type' : 'batman',
  277. 'batman-ifaces' : [ dummy_site_if_ext, ext2int_site_if ],
  278. 'batman-ifaces-ignore-regex': '.*_.*',
  279. 'ext_only' : True,
  280. },
  281. # Optional dummy interface always present in 2nd "external" BATMAN instance
  282. dummy_site_if_ext : {
  283. 'link-type' : 'dummy',
  284. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'dummy-e'),
  285. 'ext_only' : True,
  286. 'mtu' : MTU['batman_underlay_iface'],
  287. },
  288. # Optional VEth interface pair - internal side
  289. int2ext_site_if : {
  290. 'link-type' : 'veth',
  291. 'veth-peer-name' : ext2int_site_if,
  292. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'int2ext'),
  293. 'ext_only' : True,
  294. },
  295. # Optional VEth interface pair - "external" side
  296. ext2int_site_if : {
  297. 'link-type' : 'veth',
  298. 'veth-peer-name' : int2ext_site_if,
  299. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, 'ext2int'),
  300. 'ext_only' : True,
  301. },
  302. }
  303. for iface, iface_config_tmpl in site_ifaces.items ():
  304. # Ignore any interface only relevant when role batman_ext is set
  305. # but it isn't
  306. if not batman_ext and iface_config_tmpl.get ('ext_only', False):
  307. continue
  308. # Remove ext_only key so we don't leak it into ifaces dict
  309. if 'ext_only' in iface_config_tmpl:
  310. del iface_config_tmpl['ext_only']
  311. # If there is no trace of the desired iface config yet...
  312. if iface not in ifaces:
  313. # ... just place our template there.
  314. ifaces[iface] = iface_config_tmpl
  315. # If there should be an 2nd external BATMAN instance make sure
  316. # the internal side of the VEth iface pair is connected to the
  317. # internal BATMAN instance.
  318. if batman_ext and iface == bat_site_if:
  319. iface_config_tmpl['batman-ifaces'].append (int2ext_site_if)
  320. # If there already is an interface configuration try to enhance it with
  321. # meaningful values from our template and force correct hwaddress to be
  322. # used.
  323. else:
  324. iface_config = ifaces[iface]
  325. # Force hwaddress to be what we expect.
  326. if 'hwaddress' in iface_config_tmpl:
  327. iface_config['hwaddress'] = iface_config_tmpl['hwaddress']
  328. # Copy every attribute of the config template missing in iface config
  329. for attr in iface_config_tmpl:
  330. if attr not in iface_config:
  331. iface_config[attr] = iface_config_tmpl[attr]
  332. # Make sure there is a bridge present for every site where a mesh_breakout
  333. # interface should be configured.
  334. for iface, config in ifaces.items ():
  335. iface_type = config.get ('type', 'inet')
  336. if iface_type not in ['mesh_breakout', 'batman_iface']:
  337. continue
  338. site = config.get ('site')
  339. site_bridge = "br-%s" % site
  340. batman_site_if = "bat-%s" % site
  341. if iface_type == 'mesh_breakout':
  342. # If the bridge has already been defined (with an IP maybe) make
  343. # sure that the corresbonding batman device is part of the bridge-
  344. # ports.
  345. if site_bridge in ifaces:
  346. bridge_config = ifaces.get (site_bridge)
  347. # If there already is/are (a) bridge-port(s) defined, add
  348. # the batman and the breakout interfaces if not present...
  349. bridge_ports = bridge_config.get ('bridge-ports', None)
  350. if bridge_ports:
  351. for dev in (batman_site_if, iface):
  352. if not dev in bridge_ports:
  353. if type (bridge_ports) == list:
  354. bridge_ports.append (dev)
  355. else:
  356. bridge_config['bridge-ports'] += ' ' + dev
  357. # ...if there is no bridge-port defined yet, just used
  358. # the batman and breakout iface.
  359. else:
  360. bridge_config['bridge-ports'] = [ iface, batman_site_if ]
  361. # If the bridge isn't present alltogether, add it.
  362. else:
  363. ifaces[site_bridge] = {
  364. 'bridge-ports' : [ iface, batman_site_if ],
  365. }
  366. elif iface_type == 'batman_iface':
  367. batman_ifaces = ifaces[bat_site_if]['batman-ifaces']
  368. if iface not in batman_ifaces:
  369. if type (batman_ifaces) == list:
  370. batman_ifaces.append (iface)
  371. else:
  372. batman_ifaces += ' ' + iface
  373. #
  374. # Generate any implicitly defined VXLAN interfaces defined in the nodes iface
  375. # defined in pillar.
  376. # The keyword "batman_connect_sites" on an interface will trigger the
  377. # generation of a VXLAN overlay interfaces.
  378. def _generate_vxlan_interface_config (node_config, ifaces, sites_config):
  379. # No role 'batman', nothing to do
  380. if 'batman' not in node_config.get ('roles', []):
  381. return
  382. # Sites configured on this node. Nothing to do, if none.
  383. my_sites = node_config.get ('sites', [])
  384. if len (my_sites) == 0:
  385. return
  386. # As we're still here we can now safely assume that a B.A.T.M.A.N.
  387. # device has been configured for every site specified in sites list.
  388. device_no = node_config.get ('id', -1)
  389. for iface, iface_config in ifaces.items ():
  390. batman_connect_sites = iface_config.get ('batman_connect_sites', [])
  391. # If we got a string, convert it to a list with a single element
  392. if type (batman_connect_sites) == str:
  393. batman_connect_sites = [ batman_connect_sites ]
  394. # If there the list of sites to connect is empty, there's nothing to do here.
  395. if len (batman_connect_sites) == 0:
  396. continue
  397. # Set the MTU of this (probably) VLAN device to the MTU required for a VXLAN underlay
  398. # device, where B.A.T.M.A.N. adv. is to be expected within the VXLAN overlay.
  399. if 'mtu' not in iface_config:
  400. iface_config['mtu'] = MTU['vxlan_underlay_iface']
  401. # If this is a VLAN - which it probably is - fix the MTU of the underlying interface, too.
  402. if 'vlan-raw-device' in iface_config:
  403. vlan_raw_device = iface_config['vlan-raw-device']
  404. vlan_raw_device_config = ifaces.get (vlan_raw_device, None)
  405. # vlan-raw-device might point to ethX which usually isn't configured explicitly
  406. # as ifupdown2 simply will bring it up anyway by itself. To set the MTU of such
  407. # an interface we have to add a configuration stanza for it here.
  408. if vlan_raw_device_config == None:
  409. vlan_raw_device_config = {}
  410. ifaces[vlan_raw_device] = vlan_raw_device_config
  411. if not 'mtu' in vlan_raw_device_config:
  412. vlan_raw_device_config['mtu'] = MTU['vxlan_underlay_iface']
  413. # If the string 'all' is part of the list, blindly use all sites configured for this node
  414. if 'all' in batman_connect_sites:
  415. batman_connect_sites = my_sites
  416. for site in batman_connect_sites:
  417. # Silenty ignore sites not configured on this node
  418. if site not in my_sites:
  419. continue
  420. # iface_name := vx_<last 5 chars of underlay iface>_<site> stripped to 15 chars
  421. vx_iface = ("vx_%s_%s" % (re.sub ('vlan', 'v', iface)[-5:], re.sub (r'[_-]', '', site)))[:15]
  422. site_no = _get_site_no (sites_config, site)
  423. vni = 100 + site_no
  424. bat_iface = "bat-%s" % site
  425. try:
  426. iface_id = int (re.sub ('vlan', '', iface))
  427. # Gather interface specific mcast address.
  428. # The address is derived from the vlan-id of the underlying interface,
  429. # assuming that it in fact is a vlan interface.
  430. # Mangle the vlan-id into two 2 digit values, eliminating any leading zeros.
  431. iface_id_4digit = "%04d" % iface_id
  432. octet2 = int (iface_id_4digit[0:2])
  433. octet3 = int (iface_id_4digit[2:4])
  434. mcast_ip = "225.%s.%s.%s" % (octet2, octet3, site_no)
  435. vni = octet2 * 256 * 256 + octet3 * 256 + site_no
  436. except ValueError:
  437. iface_id = 9999
  438. mcast_ip = "225.0.0.%s" % site_no
  439. vni = site_no
  440. # bail out if VXLAN tunnel already configured
  441. if vx_iface in ifaces:
  442. continue
  443. # If there's no batman interface for this site, there's no point
  444. # in setting up a VXLAN interfaces
  445. if bat_iface not in ifaces:
  446. continue
  447. # Add the VXLAN interface
  448. ifaces[vx_iface] = {
  449. 'vxlan' : {
  450. 'vxlan-id' : vni,
  451. 'vxlan-svcnodeip' : mcast_ip,
  452. 'vxlan-physdev' : iface,
  453. },
  454. 'hwaddress' : gen_batman_iface_mac (site_no, device_no, iface_id),
  455. 'mtu' : MTU['batman_underlay_iface'],
  456. }
  457. # If the batman interface for this site doesn't have any interfaces
  458. # set up - which basicly cannot happen - add this VXLAN tunnel as
  459. # the first in the list.
  460. if not 'batman-ifaces' in ifaces[bat_iface]:
  461. ifaces[bat_iface]['batman-ifaces'] = [ vx_iface ]
  462. continue
  463. # In the hope there already are interfaces for batman set up already
  464. # add this VXLAN tunnel to the list
  465. batman_ifaces = ifaces[bat_iface]['batman-ifaces']
  466. if vx_iface not in batman_ifaces:
  467. if type (batman_ifaces) == list:
  468. batman_ifaces.append (vx_iface)
  469. else:
  470. batman_ifaces += ' ' + vx_iface
  471. #
  472. # Generate implicitly defined VRFs according to the vrf_info dict at the top
  473. # of this file
  474. def _generate_vrfs (ifaces):
  475. for iface, iface_config in ifaces.items ():
  476. vrf = iface_config.get ('vrf', None)
  477. if vrf and vrf not in ifaces:
  478. conf = vrf_info.get (vrf, {})
  479. table = conf.get ('table', 1234)
  480. fwmark = conf.get ('fwmark', None)
  481. ifaces[vrf] = {
  482. 'vrf-table' : table,
  483. }
  484. # Create ip rule's for any fwmarks defined
  485. if fwmark:
  486. up = []
  487. # Make sure we are dealing with a list even if there is only one mark to be set up
  488. if type (fwmark) in (str, int):
  489. fwmark = [ fwmark ]
  490. # Create ip rule entries for IPv4 and IPv6 for every fwmark
  491. for mark in fwmark:
  492. up.append ("ip rule add fwmark %s table %s" % (mark, table))
  493. up.append ("ip -6 rule add fwmark %s table %s" % (mark, table))
  494. ifaces[vrf]['up'] = up
  495. def _generate_ffrl_gre_tunnels (ifaces):
  496. for iface, iface_config in ifaces.items ():
  497. # We only care for GRE_FFRL type interfaces
  498. if iface_config.get ('type', '') != 'GRE_FFRL':
  499. continue
  500. # Copy default values to interface config
  501. for attr, val in GRE_FFRL_attrs.items ():
  502. if not attr in iface_config:
  503. iface_config[attr] = val
  504. # Guesstimate local IPv4 tunnel endpoint address from tunnel-physdev
  505. if not 'local' in iface_config and 'tunnel-physdev' in iface_config:
  506. try:
  507. physdev_prefixes = [p.split ('/')[0] for p in ifaces[iface_config['tunnel-physdev']]['prefixes'] if '.' in p]
  508. if len (physdev_prefixes) == 1:
  509. iface_config['local'] = physdev_prefixes[0]
  510. except KeyError:
  511. pass
  512. def _generate_loopback_ips (ifaces, node_config, node_id):
  513. v4_ip = "%s/32" % get_loopback_ip (node_config, node_id, 'v4')
  514. v6_ip = "%s/128" % get_loopback_ip (node_config, node_id, 'v6')
  515. # Interface lo already present?
  516. if 'lo' not in ifaces:
  517. ifaces['lo'] = { 'prefixes' : [] }
  518. # Add 'prefixes' list if not present
  519. if 'prefixes' not in ifaces['lo']:
  520. ifaces['lo']['prefixes'] = []
  521. prefixes = ifaces['lo']['prefixes']
  522. if v4_ip not in prefixes:
  523. prefixes.append (v4_ip)
  524. if v6_ip not in prefixes:
  525. prefixes.append (v6_ip)
  526. ################################################################################
  527. # Public functions #
  528. ################################################################################
  529. # Generate network interface configuration for given node.
  530. #
  531. # This function will read the network configuration from pillar and will
  532. # * enhance it with all default values configured at the top this file
  533. # * auto generate any implicitly configured
  534. # * VRFs
  535. # * B.A.T.M.A.N. instances and interfaces
  536. # * VXLAN interfaces to connect B.A.T.M.A.N. sites
  537. # * Loopback IPs derived from numeric node ID
  538. #
  539. # @param: node_config Pillar node configuration (as dict)
  540. # @param: sites_config Pillar sites configuration (as dict)
  541. # @param: node_id Minion name / Pillar node configuration key
  542. def get_interface_config (node_config, sites_config, node_id = ""):
  543. # Get config of this node and dict of all configured ifaces
  544. ifaces = node_config.get ('ifaces', {})
  545. # Generate configuration entries for any batman related interfaces not
  546. # configured explicitly, but asked for implicitly by role <batman> and
  547. # a (list of) site(s) specified in the node config.
  548. _generate_batman_interface_config (node_config, ifaces, sites_config)
  549. # Generate VXLAN tunnels for every interfaces specifying 'batman_connect_sites'
  550. _generate_vxlan_interface_config (node_config, ifaces, sites_config)
  551. # Enhance ifaces configuration with some meaningful defaults for
  552. # bonding, bridge and vlan interfaces, MAC address for batman ifaces, etc.
  553. for interface, config in ifaces.items ():
  554. if type (config) not in [ dict, collections.OrderedDict ]:
  555. raise Exception ("Configuration for interface %s on node %s seems broken!" % (interface, node_id))
  556. iface_type = config.get ('type', 'inet')
  557. if 'batman-ifaces' in config or iface_type.startswith ('batman'):
  558. _update_batman_config (node_config, interface, sites_config)
  559. if 'bond-slaves' in config:
  560. _update_bond_config (config)
  561. # FIXME: This maybe will not match on bridges without any member ports configured!
  562. if 'bridge-ports' in config or interface.startswith ('br-'):
  563. _update_bridge_config (config)
  564. if 'vlan-raw-device' in config or 'vlan-id' in config:
  565. _update_vlan_config (config)
  566. # Pimp configuration for VEth link pairs
  567. if interface.startswith ('veth_'):
  568. _update_veth_config (interface, config)
  569. # Auto generate Loopback IPs IFF not present
  570. _generate_loopback_ips (ifaces, node_config, node_id)
  571. # Auto generated VRF devices for any VRF found in ifaces and not already configured.
  572. _generate_vrfs (ifaces)
  573. # Pimp GRE_FFRL type inteface configuration with default values
  574. _generate_ffrl_gre_tunnels (ifaces)
  575. # Drop any config parameters used in node interface configuration not
  576. # relevant anymore for config file generation.
  577. for interface, config in ifaces.items ():
  578. # Set default MTU if not already set manually or by any earlier function
  579. if interface != 'lo' and ('mtu' not in config):
  580. config['mtu'] = MTU['default']
  581. for key in [ 'batman_connect_sites', 'ospf', 'site', 'type' ]:
  582. if key in config:
  583. config.pop (key)
  584. # This leaves 'auto', 'prefixes' and 'desc' as keys which should not be directly
  585. # printed into the remaining configuration. These are handled within the jinja
  586. # interface template.
  587. return ifaces
  588. # Generate entries for /etc/bat-hosts for every batman interface we will configure on any node.
  589. # For readability purposes superflous/redundant information is being stripped/supressed.
  590. # As these names will only show up in batctl calls with a specific site, site_names in interfaces
  591. # are stripped. Dummy interfaces are stripped as well.
  592. def gen_bat_hosts (nodes_config, sites_config):
  593. bat_hosts = {}
  594. for node_id in sorted (nodes_config.keys ()):
  595. node_config = nodes_config.get (node_id)
  596. node_name = node_id.split ('.')[0]
  597. ifaces = get_interface_config (node_config, sites_config, node_id)
  598. for iface in sorted (ifaces):
  599. iface_config = ifaces.get (iface)
  600. hwaddress = iface_config.get ('hwaddress', None)
  601. if hwaddress == None:
  602. continue
  603. entry_name = node_name
  604. match = re.search (r'^dummy-(.+)(-e)?$', iface)
  605. if match:
  606. if match.group (2):
  607. entry_name += "-e"
  608. # Append site to make name unique
  609. entry_name += "/%s" % match.group (1)
  610. else:
  611. entry_name += "/%s" % re.sub (r'^(vx_.*|i2e|e2i)[_-](.*)$', '\g<1>/\g<2>', iface)
  612. bat_hosts[hwaddress] = entry_name
  613. if 'fastd' in node_config.get ('roles', []):
  614. device_no = node_config.get ('id')
  615. for site in node_config.get ('sites', []):
  616. site_no = _get_site_no (sites_config, site)
  617. for network in ('intergw', 'nodes4', 'nodes6'):
  618. hwaddress = gen_batman_iface_mac (site_no, device_no, network)
  619. bat_hosts[hwaddress] = "%s/%s/%s" % (node_name, network, site)
  620. return bat_hosts
  621. # Generate eBGP session parameters for FFRL Transit from nodes pillar information.
  622. def get_ffrl_bgp_config (ifaces, proto):
  623. from ipcalc import IP
  624. _generate_ffrl_gre_tunnels (ifaces)
  625. sessions = {}
  626. for iface in sorted (ifaces):
  627. # We only care for GRE tunnels to the FFRL Backbone
  628. if not iface.startswith ('gre_ffrl_'):
  629. continue
  630. iface_config = ifaces.get (iface)
  631. # Search for IPv4/IPv6 prefix as defined by proto parameter
  632. local = None
  633. neighbor = None
  634. for prefix in iface_config.get ('prefixes', []):
  635. if (proto == 'v4' and '.' in prefix) or (proto == 'v6' and ':' in prefix):
  636. local = prefix.split ('/')[0]
  637. # Calculate neighbor IP as <local IP> - 1
  638. if proto == 'v4':
  639. neighbor = str (IP (int (IP (local)) - 1, version = 4))
  640. else:
  641. neighbor = str (IP (int (IP (local)) - 1, version = 6))
  642. break
  643. # Strip gre_ prefix iface name and use it as identifier for the eBGP session.
  644. name = re.sub ('gre_ffrl_', 'ffrl_', iface)
  645. sessions[name] = {
  646. 'local' : local,
  647. 'neighbor' : neighbor,
  648. 'bgp_local_pref' : iface_config.get ('bgp_local_pref', None),
  649. }
  650. return sessions
  651. # Get list of IP address configured on given interface on given node.
  652. #
  653. # @param: node_config Pillar node configuration (as dict)
  654. # @param: iface_name Name of the interface defined in pillar node config
  655. # OR name of VRF ("vrf_<something>") whichs ifaces are
  656. # to be examined.
  657. def get_node_iface_ips (node_config, iface_name):
  658. ips = {
  659. 'v4' : [],
  660. 'v6' : [],
  661. }
  662. ifaces = node_config.get ('ifaces', {})
  663. ifaces_names = [ iface_name ]
  664. if iface_name.startswith ('vrf_'):
  665. # Reset list of ifaces_names to consider
  666. ifaces_names = []
  667. vrf = iface_name
  668. for iface, iface_config in ifaces.items ():
  669. # Ignore any iface NOT in the given VRF
  670. if iface_config.get ('vrf', None) != vrf:
  671. continue
  672. # Ignore any VEth pairs
  673. if iface.startswith ('veth'):
  674. continue
  675. ifaces_names.append (iface)
  676. try:
  677. for iface in ifaces_names:
  678. for prefix in ifaces[iface]['prefixes']:
  679. ip_ver = 'v6' if ':' in prefix else 'v4'
  680. ips[ip_ver].append (prefix.split ('/')[0])
  681. except KeyError:
  682. pass
  683. return ips
  684. #
  685. # Get the lookback IP of the given node for the given proto
  686. #
  687. # @param node_config: Pillar node configuration (as dict)
  688. # @param node_id: Minion name / Pillar node configuration key
  689. # @param proto: { 'v4', 'v6' }
  690. def get_loopback_ip (node_config, node_id, proto):
  691. if proto not in [ 'v4', 'v6' ]:
  692. raise Exception ("get_loopback_ip(): Invalid proto: \"%s\"." % proto)
  693. if not proto in loopback_prefix:
  694. raise Exception ("get_loopback_ip(): No loopback_prefix configured for IP%s in ffno_net module!" % proto)
  695. if not 'id' in node_config:
  696. raise Exception ("get_loopback_ip(): No 'id' configured in pillar for node \"%s\"!" % node_id)
  697. # Every rule has an exception.
  698. # If there is a loopback_overwrite configuration for this node, use this instead of
  699. # the generated IPs.
  700. if 'loopback_override' in node_config:
  701. if proto not in node_config['loopback_override']:
  702. raise Exception ("get_loopback_ip(): No loopback_prefix configured for IP%s in node config / loopback_override!" % proto)
  703. return node_config['loopback_override'][proto]
  704. return "%s%s" % (loopback_prefix.get (proto), node_config.get ('id'))
  705. #
  706. # Get the router id (read: IPv4 Lo-IP) out of the given node config.
  707. def get_router_id (node_config, node_id):
  708. return get_loopback_ip (node_config, node_id, 'v4')
  709. # Compute minions OSPF interface configuration according to FFHO routing policy
  710. # See https://wiki.ffho.net/infrastruktur:vlans for information about Vlans
  711. def get_ospf_interface_config (node_config, grains_id):
  712. ospf_node_config = node_config.get ('ospf', {})
  713. ospf_interfaces = {}
  714. for iface, iface_config in node_config.get ('ifaces', {}).items ():
  715. # By default we don't speak OSPF on interfaces
  716. ospf_on = False
  717. # Defaults for OSPF interfaces
  718. ospf_config = {
  719. 'stub' : True, # Active/Passive interface
  720. 'cost' : 12345,
  721. # 'type' # Area type
  722. }
  723. # OSPF configuration for interface given?
  724. ospf_config_pillar = iface_config.get ('ospf', {})
  725. # Local Gigabit Ethernet based connections (PTP or L2 subnets), cost 10
  726. if re.search (r'^(br-?|br\d+\.|vlan)10\d\d$', iface):
  727. ospf_on = True
  728. ospf_config['stub'] = False
  729. ospf_config['cost'] = 10
  730. ospf_config['desc'] = "Wired Gigabit connection"
  731. # AF-X based WBBL connection
  732. elif re.search (r'^vlan20\d\d$', iface):
  733. ospf_on = True
  734. ospf_config['stub'] = False
  735. ospf_config['cost'] = 100
  736. ospf_config['desc'] = "AF-X based WBBL connection"
  737. # Non-AF-X based WBBL connection
  738. elif re.search (r'^vlan22\d\d$', iface):
  739. ospf_on = True
  740. ospf_config['stub'] = False
  741. ospf_config['cost'] = 1000
  742. ospf_config['desc'] = "Non-AF-X based WBBL connection"
  743. # Management Vlans
  744. elif re.search (r'^vlan30\d\d$', iface):
  745. ospf_on = True
  746. ospf_config['stub'] = True
  747. ospf_config['cost'] = 10
  748. # Active OSPF on OpenVPN tunnels, cost 10000
  749. elif iface.startswith ('ovpn-'):
  750. ospf_on = True
  751. ospf_config['stub'] = False
  752. ospf_config['cost'] = 10000
  753. # Inter-Core links should have cost 5000
  754. if iface.startswith ('ovpn-cr') and grains_id.startswith ('cr'):
  755. ospf_config['cost'] = 5000
  756. # OpenVPN tunnels to EdgeRouters
  757. elif iface.startswith ('ovpn-er-'):
  758. ospf_config['type'] = 'broadcast'
  759. # Configure Out-of-band OpenVPN tunnels as stub interfaces,
  760. # so recursive next-hop lookups for OOB-BGP-session will work.
  761. elif iface.startswith ('oob-'):
  762. ospf_on = True
  763. ospf_config['stub'] = True
  764. ospf_config['cost'] = 1000
  765. # OSPF explicitly enabled for interface
  766. elif 'ospf' in iface_config:
  767. ospf_on = True
  768. # iface ospf parameters will be applied later
  769. # Go on if OSPF should not be actived
  770. if not ospf_on:
  771. continue
  772. # Explicit OSPF interface configuration parameters take precendence over generated ones
  773. for attr, val in ospf_config_pillar:
  774. ospf_config[attr] = val
  775. # Convert boolean values to 'yes' / 'no' string values
  776. for attr, val in ospf_config.items ():
  777. if type (val) == bool:
  778. ospf_config[attr] = 'yes' if val else 'no'
  779. # Store interface configuration
  780. ospf_interfaces[iface] = ospf_config
  781. return ospf_interfaces
  782. # Return (possibly empty) subset of Traffic Engineering entries from 'te' pillar entry
  783. # relevenant for this minion and protocol (IPv4 / IPv6)
  784. def get_te_prefixes (te_node_config, grains_id, proto):
  785. te_config = {}
  786. for prefix, prefix_config in te_node_config.get ('prefixes', {}).items ():
  787. prefix_proto = 'v6' if ':' in prefix else 'v4'
  788. # Should this TE policy be applied on this node and is the prefix
  789. # of the proto we are looking for?
  790. if grains_id in prefix_config.get ('nodes', []) and prefix_proto == proto:
  791. te_config[prefix] = prefix_config
  792. return te_config
  793. def generate_DNS_entries (nodes_config, sites_config):
  794. import ipaddress
  795. forward_zone_name = ""
  796. forward_zone = []
  797. zones = {
  798. # <forward_zone_name>: [],
  799. # <rev_zone1_name>: [],
  800. # <rev_zone2_name>: [],
  801. # ...
  802. }
  803. # Fill zones dict with zones configured in DNS_zone_names at the top of this file.
  804. # Make sure the zone base names provided start with a leading . so the string
  805. # operations later can be done easily and safely. Proceed with fingers crossed.
  806. for entry, value in DNS_zone_names.items ():
  807. if entry == "forward":
  808. zone = value
  809. if not zone.startswith ('.'):
  810. zone = ".%s" % zone
  811. zones[zone] = forward_zone
  812. forward_zone_name = zone
  813. if entry in [ 'rev_v4', 'rev_v6' ]:
  814. for zone in value:
  815. if not zone.startswith ('.'):
  816. zone = ".%s" % zone
  817. zones[zone] = []
  818. # Process all interfaace of all nodes defined in pillar and generate forward
  819. # and reverse entries for all zones defined in DNS_zone_names. Automagically
  820. # put reverse entries into correct zone.
  821. for node_id in sorted (nodes_config):
  822. node_config = nodes_config.get (node_id)
  823. ifaces = get_interface_config (node_config, sites_config, node_id)
  824. for iface in sorted (ifaces):
  825. iface_config = ifaces.get (iface)
  826. # We only care for interfaces with IPs configured
  827. prefixes = iface_config.get ("prefixes", None)
  828. if prefixes == None:
  829. continue
  830. # Ignore any interface in $VRF
  831. if iface_config.get ('vrf', "") in [ 'vrf_external' ]:
  832. continue
  833. for prefix in sorted (prefixes):
  834. ip = ipaddress.ip_address (u'%s' % prefix.split ('/')[0])
  835. proto = 'v%s' % ip.version
  836. # The entry name is
  837. # <node_id> when interface 'lo'
  838. # <node_name>.srv.<residual> when interface 'srv' (or magically detected internal srv record)
  839. # <interface>.<node_id> else
  840. entry_name = node_id
  841. if iface != "lo":
  842. entry_name = "%s.%s" % (iface, node_id)
  843. elif iface == 'srv' or re.search (r'^(10.132.251|2a03:2260:2342:f251:)', prefix):
  844. entry_name = re.sub (r'^([^.]+)\.(.+)$', r'\g<1>.srv.\g<2>', entry_name)
  845. # Strip forward zone name from entry_name and store forward entry
  846. # with correct entry type for found IP address.
  847. forward_entry_name = re.sub (forward_zone_name, "", entry_name)
  848. forward_entry_name = re.sub (forward_zone_name, "", entry_name)
  849. forward_entry_typ = "A" if ip.version == 4 else "AAAA"
  850. forward_zone.append ("%s IN %s %s" % (forward_entry_name, forward_entry_typ, ip))
  851. # Find correct reverse zone, if configured and strip reverse zone name
  852. # from calculated reverse pointer name. Store reverse entry if we found
  853. # a zone for it. If no configured reverse zone did match, this reverse
  854. # entry will be ignored.
  855. for zone in zones:
  856. if ip.reverse_pointer.find (zone) > 0:
  857. PTR_entry = re.sub (zone, "", ip.reverse_pointer)
  858. zones[zone].append ("%s IN PTR %s." % (PTR_entry, entry_name))
  859. break
  860. return zones
  861. # Convert the CIDR network from the given prefix into a dotted netmask
  862. def cidr_to_dotted_mask (prefix):
  863. from ipcalc import Network
  864. return str (Network (prefix).netmask ())