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cf9b9f77 OD |
1 | /* |
2 | * This is an implementation of RFC7684 OSPFv2 Prefix/Link Attribute | |
3 | * Advertisement | |
4 | * | |
5 | * Module name: Extended Prefix/Link Opaque LSA | |
6 | * | |
cf9b9f77 | 7 | * Author: Olivier Dugeon <olivier.dugeon@orange.com> |
7743f2f8 | 8 | * Author: Anselme Sawadogo <anselmesawadogo@gmail.com> |
cf9b9f77 | 9 | * |
7743f2f8 | 10 | * Copyright (C) 2016 - 2018 Orange Labs http://www.orange.com |
cf9b9f77 | 11 | * |
7743f2f8 OD |
12 | * This program is free software; you can redistribute it and/or modify it |
13 | * under the terms of the GNU General Public License as published by the Free | |
14 | * Software Foundation; either version 2 of the License, or (at your option) | |
15 | * any later version. | |
cf9b9f77 | 16 | * |
7743f2f8 OD |
17 | * This program is distributed in the hope that it will be useful, but WITHOUT |
18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
20 | * more details. | |
cf9b9f77 | 21 | * |
7743f2f8 OD |
22 | * You should have received a copy of the GNU General Public License along |
23 | * with this program; see the file COPYING; if not, write to the Free Software | |
24 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
cf9b9f77 OD |
25 | */ |
26 | ||
27 | #include <zebra.h> | |
28 | #include <math.h> | |
29 | #include <stdio.h> | |
30 | #include <stdlib.h> | |
31 | ||
32 | #include "linklist.h" | |
33 | #include "prefix.h" | |
34 | #include "if.h" | |
35 | #include "table.h" | |
36 | #include "memory.h" | |
37 | #include "command.h" | |
38 | #include "vty.h" | |
39 | #include "stream.h" | |
40 | #include "log.h" | |
41 | #include "thread.h" | |
42 | #include "hash.h" | |
43 | #include "sockunion.h" /* for inet_aton() */ | |
44 | #include "network.h" | |
45 | #include "if.h" | |
46 | #include "libospf.h" /* for ospf interface types */ | |
47 | ||
48 | #include "ospfd/ospfd.h" | |
49 | #include "ospfd/ospf_interface.h" | |
50 | #include "ospfd/ospf_ism.h" | |
51 | #include "ospfd/ospf_asbr.h" | |
52 | #include "ospfd/ospf_lsa.h" | |
53 | #include "ospfd/ospf_lsdb.h" | |
54 | #include "ospfd/ospf_neighbor.h" | |
55 | #include "ospfd/ospf_nsm.h" | |
56 | #include "ospfd/ospf_flood.h" | |
57 | #include "ospfd/ospf_packet.h" | |
58 | #include "ospfd/ospf_spf.h" | |
59 | #include "ospfd/ospf_dump.h" | |
60 | #include "ospfd/ospf_route.h" | |
61 | #include "ospfd/ospf_ase.h" | |
62 | #include "ospfd/ospf_zebra.h" | |
63 | #include "ospfd/ospf_sr.h" | |
64 | #include "ospfd/ospf_ext.h" | |
85c9b439 | 65 | #include "ospfd/ospf_errors.h" |
cf9b9f77 OD |
66 | |
67 | /* Following structure are internal use only. */ | |
68 | ||
69 | /* | |
70 | * Global variable to manage Extended Prefix/Link Opaque LSA on this node. | |
71 | * Note that all parameter values are stored in network byte order. | |
72 | */ | |
73 | static struct ospf_ext_lp OspfEXT; | |
74 | ||
7743f2f8 OD |
75 | /* |
76 | * ----------------------------------------------------------------------- | |
77 | * Followings are initialize/terminate functions for Extended Prefix/Link | |
78 | * Opaque LSA handling. | |
79 | * ----------------------------------------------------------------------- | |
80 | */ | |
cf9b9f77 OD |
81 | |
82 | /* Extended Prefix Opaque LSA related callback functions */ | |
7743f2f8 | 83 | static void ospf_ext_pref_ism_change(struct ospf_interface *oi, int old_status); |
cf9b9f77 OD |
84 | static void ospf_ext_pref_show_info(struct vty *vty, struct ospf_lsa *lsa); |
85 | static int ospf_ext_pref_lsa_originate(void *arg); | |
86 | static struct ospf_lsa *ospf_ext_pref_lsa_refresh(struct ospf_lsa *lsa); | |
87 | static void ospf_ext_pref_lsa_schedule(struct ext_itf *exti, | |
88 | enum lsa_opcode opcode); | |
89 | /* Extended Link Opaque LSA related callback functions */ | |
90 | static int ospf_ext_link_new_if(struct interface *ifp); | |
91 | static int ospf_ext_link_del_if(struct interface *ifp); | |
92 | static void ospf_ext_link_ism_change(struct ospf_interface *oi, int old_status); | |
93 | static void ospf_ext_link_nsm_change(struct ospf_neighbor *nbr, int old_status); | |
94 | static void ospf_ext_link_show_info(struct vty *vty, struct ospf_lsa *lsa); | |
95 | static int ospf_ext_link_lsa_originate(void *arg); | |
96 | static struct ospf_lsa *ospf_ext_link_lsa_refresh(struct ospf_lsa *lsa); | |
97 | static void ospf_ext_link_lsa_schedule(struct ext_itf *exti, | |
98 | enum lsa_opcode opcode); | |
99 | static void ospf_ext_lsa_schedule(struct ext_itf *exti, enum lsa_opcode op); | |
100 | static int ospf_ext_link_lsa_update(struct ospf_lsa *lsa); | |
101 | static int ospf_ext_pref_lsa_update(struct ospf_lsa *lsa); | |
102 | static void del_ext_info(void *val); | |
103 | ||
104 | /* | |
105 | * Extended Link/Prefix initialization | |
106 | * | |
107 | * @param - none | |
108 | * | |
109 | * @return - 0 if OK, <> 0 otherwise | |
110 | */ | |
111 | int ospf_ext_init(void) | |
112 | { | |
113 | int rc = 0; | |
114 | ||
115 | memset(&OspfEXT, 0, sizeof(struct ospf_ext_lp)); | |
116 | OspfEXT.enabled = false; | |
117 | /* Only Area flooding is supported yet */ | |
118 | OspfEXT.scope = OSPF_OPAQUE_AREA_LSA; | |
119 | /* Initialize interface list */ | |
120 | OspfEXT.iflist = list_new(); | |
121 | OspfEXT.iflist->del = del_ext_info; | |
122 | ||
7743f2f8 | 123 | zlog_info("EXT (%s): Register Extended Link Opaque LSA", __func__); |
cf9b9f77 OD |
124 | rc = ospf_register_opaque_functab( |
125 | OSPF_OPAQUE_AREA_LSA, OPAQUE_TYPE_EXTENDED_LINK_LSA, | |
996c9314 LB |
126 | ospf_ext_link_new_if, /* new if */ |
127 | ospf_ext_link_del_if, /* del if */ | |
cf9b9f77 OD |
128 | ospf_ext_link_ism_change, /* ism change */ |
129 | ospf_ext_link_nsm_change, /* nsm change */ | |
130 | NULL, /* Write router config. */ | |
131 | NULL, /* Write interface conf. */ | |
132 | NULL, /* Write debug config. */ | |
133 | ospf_ext_link_show_info, /* Show LSA info */ | |
134 | ospf_ext_link_lsa_originate, /* Originate LSA */ | |
135 | ospf_ext_link_lsa_refresh, /* Refresh LSA */ | |
136 | ospf_ext_link_lsa_update, /* new_lsa_hook */ | |
137 | NULL); /* del_lsa_hook */ | |
138 | ||
139 | if (rc != 0) { | |
cf444bcf | 140 | flog_warn(EC_OSPF_OPAQUE_REGISTRATION, |
85c9b439 | 141 | "EXT (%s): Failed to register Extended Link LSA", |
7743f2f8 | 142 | __func__); |
cf9b9f77 OD |
143 | return rc; |
144 | } | |
145 | ||
7743f2f8 | 146 | zlog_info("EXT (%s): Register Extended Prefix Opaque LSA", __func__); |
cf9b9f77 OD |
147 | rc = ospf_register_opaque_functab( |
148 | OspfEXT.scope, OPAQUE_TYPE_EXTENDED_PREFIX_LSA, | |
7743f2f8 OD |
149 | NULL, /* new if handle by link */ |
150 | NULL, /* del if handle by link */ | |
151 | ospf_ext_pref_ism_change, /* ism change */ | |
cf9b9f77 OD |
152 | NULL, /* nsm change */ |
153 | ospf_sr_config_write_router, /* Write router config. */ | |
154 | NULL, /* Write interface conf. */ | |
155 | NULL, /* Write debug config. */ | |
156 | ospf_ext_pref_show_info, /* Show LSA info */ | |
157 | ospf_ext_pref_lsa_originate, /* Originate LSA */ | |
158 | ospf_ext_pref_lsa_refresh, /* Refresh LSA */ | |
159 | ospf_ext_pref_lsa_update, /* new_lsa_hook */ | |
160 | NULL); /* del_lsa_hook */ | |
161 | if (rc != 0) { | |
cf444bcf | 162 | flog_warn(EC_OSPF_OPAQUE_REGISTRATION, |
85c9b439 | 163 | "EXT (%s): Failed to register Extended Prefix LSA", |
7743f2f8 | 164 | __func__); |
cf9b9f77 OD |
165 | return rc; |
166 | } | |
167 | ||
168 | return rc; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Extended Link/Prefix termination function | |
173 | * | |
bcf4475e | 174 | * @param - none |
cf9b9f77 OD |
175 | * @return - none |
176 | */ | |
177 | void ospf_ext_term(void) | |
178 | { | |
179 | ||
89f60109 DS |
180 | if ((OspfEXT.scope == OSPF_OPAQUE_AREA_LSA) |
181 | || (OspfEXT.scope == OSPF_OPAQUE_AS_LSA)) | |
bcf4475e OD |
182 | ospf_delete_opaque_functab(OspfEXT.scope, |
183 | OPAQUE_TYPE_EXTENDED_PREFIX_LSA); | |
184 | ||
185 | ospf_delete_opaque_functab(OSPF_OPAQUE_AREA_LSA, | |
186 | OPAQUE_TYPE_EXTENDED_LINK_LSA); | |
187 | ||
6a154c88 | 188 | list_delete(&OspfEXT.iflist); |
cf9b9f77 OD |
189 | OspfEXT.scope = 0; |
190 | OspfEXT.enabled = false; | |
191 | ||
bcf4475e OD |
192 | return; |
193 | } | |
194 | ||
195 | /* | |
196 | * Extended Link/Prefix finish function | |
197 | * | |
198 | * @param - none | |
199 | * @return - none | |
200 | */ | |
201 | void ospf_ext_finish(void) | |
202 | { | |
203 | // list_delete_all_node(OspfEXT.iflist); | |
204 | OspfEXT.enabled = false; | |
cf9b9f77 OD |
205 | } |
206 | ||
7743f2f8 OD |
207 | /* |
208 | * --------------------------------------------------------------------- | |
cf9b9f77 OD |
209 | * Followings are control functions for Extended Prefix/Link Opaque LSA |
210 | * parameters management. | |
7743f2f8 OD |
211 | * --------------------------------------------------------------------- |
212 | */ | |
213 | ||
cf9b9f77 OD |
214 | /* Functions to free memory space */ |
215 | static void del_ext_info(void *val) | |
216 | { | |
217 | XFREE(MTYPE_OSPF_EXT_PARAMS, val); | |
cf9b9f77 OD |
218 | } |
219 | ||
220 | /* Increment instance value for Extended Prefix Opaque LSAs Opaque ID field */ | |
93f0a26e | 221 | static uint32_t get_ext_pref_instance_value(void) |
cf9b9f77 | 222 | { |
93f0a26e | 223 | static uint32_t seqno = 0; |
cf9b9f77 OD |
224 | |
225 | if (seqno < MAX_LEGAL_EXT_INSTANCE_NUM) | |
226 | seqno += 1; | |
227 | else | |
228 | seqno = 1; /* Avoid zero. */ | |
229 | ||
230 | return seqno; | |
231 | } | |
232 | ||
233 | /* Increment instance value for Extended Link Opaque LSAs Opaque ID field */ | |
93f0a26e | 234 | static uint32_t get_ext_link_instance_value(void) |
cf9b9f77 | 235 | { |
93f0a26e | 236 | static uint32_t seqno = 0; |
cf9b9f77 OD |
237 | |
238 | if (seqno < MAX_LEGAL_EXT_INSTANCE_NUM) | |
239 | seqno += 1; | |
240 | else | |
241 | seqno = 1; /* Avoid zero. */ | |
242 | ||
243 | return seqno; | |
244 | } | |
245 | ||
246 | /* Lookup Extended Prefix/Links by ifp from OspfEXT struct iflist */ | |
247 | static struct ext_itf *lookup_ext_by_ifp(struct interface *ifp) | |
248 | { | |
249 | struct listnode *node, *nnode; | |
250 | struct ext_itf *exti; | |
251 | ||
252 | for (ALL_LIST_ELEMENTS(OspfEXT.iflist, node, nnode, exti)) | |
253 | if (exti->ifp == ifp) | |
254 | return exti; | |
255 | ||
256 | return NULL; | |
257 | } | |
258 | ||
259 | /* Lookup Extended Prefix/Links by LSA ID from OspfEXT struct iflist */ | |
260 | static struct ext_itf *lookup_ext_by_instance(struct ospf_lsa *lsa) | |
261 | { | |
262 | struct listnode *node; | |
263 | struct ext_itf *exti; | |
db28a51f OD |
264 | uint32_t key = GET_OPAQUE_ID(ntohl(lsa->data->id.s_addr)); |
265 | uint8_t type = GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr)); | |
266 | ||
cf9b9f77 OD |
267 | |
268 | for (ALL_LIST_ELEMENTS_RO(OspfEXT.iflist, node, exti)) | |
db28a51f | 269 | if ((exti->instance == key) && (exti->type == type)) |
cf9b9f77 OD |
270 | return exti; |
271 | ||
cf9b9f77 OD |
272 | return NULL; |
273 | } | |
274 | ||
7743f2f8 OD |
275 | /* |
276 | * ---------------------------------------------------------------------- | |
cf9b9f77 OD |
277 | * The underlying subsection defines setters and unsetters to create and |
278 | * delete tlvs and subtlvs | |
7743f2f8 OD |
279 | * ---------------------------------------------------------------------- |
280 | */ | |
cf9b9f77 OD |
281 | |
282 | /* Extended Prefix TLV - RFC7684 section 2.1 */ | |
93f0a26e OD |
283 | static void set_ext_prefix(struct ext_itf *exti, uint8_t route_type, |
284 | uint8_t flags, struct prefix_ipv4 p) | |
cf9b9f77 OD |
285 | { |
286 | ||
287 | TLV_TYPE(exti->prefix) = htons(EXT_TLV_PREFIX); | |
288 | /* Warning: Size must be adjust depending of subTLV's */ | |
289 | TLV_LEN(exti->prefix) = htons(EXT_TLV_PREFIX_SIZE); | |
290 | exti->prefix.route_type = route_type; | |
291 | exti->prefix.flags = flags; | |
292 | /* Only Address Family Ipv4 (0) is defined in RFC 7684 */ | |
293 | exti->prefix.af = 0; | |
294 | exti->prefix.pref_length = p.prefixlen; | |
295 | exti->prefix.address = p.prefix; | |
296 | } | |
297 | ||
298 | /* Extended Link TLV - RFC7684 section 3.1 */ | |
93f0a26e | 299 | static void set_ext_link(struct ext_itf *exti, uint8_t type, struct in_addr id, |
cf9b9f77 OD |
300 | struct in_addr data) |
301 | { | |
302 | ||
303 | TLV_TYPE(exti->link) = htons(EXT_TLV_LINK); | |
304 | /* Warning: Size must be adjust depending of subTLV's */ | |
305 | TLV_LEN(exti->link) = htons(EXT_TLV_LINK_SIZE); | |
306 | exti->link.link_type = type; | |
307 | exti->link.link_id = id; | |
308 | exti->link.link_data = data; | |
309 | } | |
310 | ||
311 | /* Prefix SID SubTLV - section 5 */ | |
93f0a26e | 312 | static void set_prefix_sid(struct ext_itf *exti, uint8_t algorithm, |
7743f2f8 | 313 | uint32_t value, int value_type, uint8_t flags) |
cf9b9f77 OD |
314 | { |
315 | ||
cf9b9f77 OD |
316 | if ((algorithm != SR_ALGORITHM_SPF) |
317 | && (algorithm != SR_ALGORITHM_STRICT_SPF)) { | |
cf444bcf | 318 | flog_err(EC_OSPF_INVALID_ALGORITHM, |
89f60109 DS |
319 | "EXT (%s): unrecognized algorithm, not SPF or S-SPF", |
320 | __func__); | |
cf9b9f77 OD |
321 | return; |
322 | } | |
323 | ||
7743f2f8 | 324 | /* Update flags according to the type of value field: label or index */ |
cf9b9f77 | 325 | if (value_type == SID_LABEL) |
7743f2f8 | 326 | SET_FLAG(flags, EXT_SUBTLV_PREFIX_SID_VFLG); |
cf9b9f77 OD |
327 | |
328 | /* set prefix sid subtlv for an extended prefix tlv */ | |
329 | TLV_TYPE(exti->node_sid) = htons(EXT_SUBTLV_PREFIX_SID); | |
330 | exti->node_sid.algorithm = algorithm; | |
331 | exti->node_sid.flags = flags; | |
332 | exti->node_sid.mtid = 0; /* Multi-Topology is not supported */ | |
333 | ||
334 | /* Set Label or Index value */ | |
335 | if (value_type == SID_LABEL) { | |
d922605d OD |
336 | TLV_LEN(exti->node_sid) = |
337 | htons(SID_LABEL_SIZE(EXT_SUBTLV_PREFIX_SID_SIZE)); | |
cf9b9f77 OD |
338 | exti->node_sid.value = htonl(SET_LABEL(value)); |
339 | } else { | |
d922605d OD |
340 | TLV_LEN(exti->node_sid) = |
341 | htons(SID_INDEX_SIZE(EXT_SUBTLV_PREFIX_SID_SIZE)); | |
cf9b9f77 OD |
342 | exti->node_sid.value = htonl(value); |
343 | } | |
cf9b9f77 OD |
344 | } |
345 | ||
346 | /* Adjacency SID SubTLV - section 6.1 */ | |
93f0a26e | 347 | static void set_adj_sid(struct ext_itf *exti, bool backup, uint32_t value, |
cf9b9f77 OD |
348 | int value_type) |
349 | { | |
350 | int index; | |
93f0a26e | 351 | uint8_t flags; |
cf9b9f77 OD |
352 | |
353 | /* Determine which ADJ_SID must be set: nominal or backup */ | |
354 | if (backup) { | |
355 | flags = EXT_SUBTLV_LINK_ADJ_SID_BFLG; | |
356 | index = 1; | |
357 | } else { | |
358 | index = 0; | |
359 | flags = 0; | |
360 | } | |
361 | ||
362 | /* Set Header */ | |
363 | TLV_TYPE(exti->adj_sid[index]) = htons(EXT_SUBTLV_ADJ_SID); | |
364 | ||
365 | /* Only Local ADJ-SID is supported for the moment */ | |
366 | SET_FLAG(flags, EXT_SUBTLV_LINK_ADJ_SID_LFLG); | |
367 | ||
368 | exti->adj_sid[index].mtid = 0; /* Multi-Topology is not supported */ | |
369 | ||
370 | /* Adjust Length, Flags and Value depending on the type of Label */ | |
371 | if (value_type == SID_LABEL) { | |
372 | SET_FLAG(flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG); | |
d922605d OD |
373 | TLV_LEN(exti->adj_sid[index]) = |
374 | htons(SID_LABEL_SIZE(EXT_SUBTLV_ADJ_SID_SIZE)); | |
cf9b9f77 OD |
375 | exti->adj_sid[index].value = htonl(SET_LABEL(value)); |
376 | } else { | |
377 | UNSET_FLAG(flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG); | |
d922605d OD |
378 | TLV_LEN(exti->adj_sid[index]) = |
379 | htons(SID_INDEX_SIZE(EXT_SUBTLV_ADJ_SID_SIZE)); | |
cf9b9f77 OD |
380 | exti->adj_sid[index].value = htonl(value); |
381 | } | |
382 | ||
383 | exti->adj_sid[index].flags = flags; /* Set computed flags */ | |
384 | exti->adj_sid[index].mtid = 0; /* Multi-Topology is not supported */ | |
385 | exti->adj_sid[index].weight = 0; /* Load-Balancing is not supported */ | |
cf9b9f77 OD |
386 | } |
387 | ||
388 | /* LAN Adjacency SID SubTLV - section 6.2 */ | |
93f0a26e | 389 | static void set_lan_adj_sid(struct ext_itf *exti, bool backup, uint32_t value, |
cf9b9f77 OD |
390 | int value_type, struct in_addr neighbor_id) |
391 | { | |
392 | ||
393 | int index; | |
93f0a26e | 394 | uint8_t flags; |
cf9b9f77 OD |
395 | |
396 | /* Determine which ADJ_SID must be set: nominal or backup */ | |
397 | if (backup) { | |
398 | flags = EXT_SUBTLV_LINK_ADJ_SID_BFLG; | |
399 | index = 1; | |
400 | } else { | |
401 | index = 0; | |
402 | flags = 0; | |
403 | } | |
404 | ||
405 | /* Set Header */ | |
d922605d | 406 | TLV_TYPE(exti->lan_sid[index]) = htons(EXT_SUBTLV_LAN_ADJ_SID); |
cf9b9f77 OD |
407 | |
408 | /* Only Local ADJ-SID is supported for the moment */ | |
409 | SET_FLAG(flags, EXT_SUBTLV_LINK_ADJ_SID_LFLG); | |
410 | ||
411 | /* Adjust Length, Flags and Value depending on the type of Label */ | |
412 | if (value_type == SID_LABEL) { | |
413 | SET_FLAG(flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG); | |
d922605d OD |
414 | TLV_LEN(exti->lan_sid[index]) = |
415 | htons(SID_LABEL_SIZE(EXT_SUBTLV_PREFIX_RANGE_SIZE)); | |
cf9b9f77 OD |
416 | exti->lan_sid[index].value = htonl(SET_LABEL(value)); |
417 | } else { | |
418 | UNSET_FLAG(flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG); | |
d922605d OD |
419 | TLV_LEN(exti->lan_sid[index]) = |
420 | htons(SID_INDEX_SIZE(EXT_SUBTLV_PREFIX_RANGE_SIZE)); | |
cf9b9f77 OD |
421 | exti->lan_sid[index].value = htonl(value); |
422 | } | |
423 | ||
424 | exti->lan_sid[index].flags = flags; /* Set computed flags */ | |
425 | exti->lan_sid[index].mtid = 0; /* Multi-Topology is not supported */ | |
426 | exti->lan_sid[index].weight = 0; /* Load-Balancing is not supported */ | |
427 | exti->lan_sid[index].neighbor_id = neighbor_id; | |
cf9b9f77 OD |
428 | } |
429 | ||
430 | /* Experimental SubTLV from Cisco */ | |
431 | static void set_rmt_itf_addr(struct ext_itf *exti, struct in_addr rmtif) | |
432 | { | |
433 | ||
434 | TLV_TYPE(exti->rmt_itf_addr) = htons(EXT_SUBTLV_RMT_ITF_ADDR); | |
435 | TLV_LEN(exti->rmt_itf_addr) = htons(sizeof(struct in_addr)); | |
436 | exti->rmt_itf_addr.value = rmtif; | |
cf9b9f77 OD |
437 | } |
438 | ||
439 | /* | |
440 | * Update Extended prefix SID index for Loopback interface type | |
441 | * | |
442 | * @param ifname - Loopback interface name | |
443 | * @param index - new value for the prefix SID of this interface | |
444 | * @param p - prefix for this interface or NULL if Extended Prefix | |
445 | * should be remove | |
446 | * | |
447 | * @return instance number if update is OK, 0 otherwise | |
448 | */ | |
db28a51f | 449 | uint32_t ospf_ext_schedule_prefix_index(struct interface *ifp, uint32_t index, |
996c9314 | 450 | struct prefix_ipv4 *p, uint8_t flags) |
cf9b9f77 OD |
451 | { |
452 | int rc = 0; | |
453 | struct ext_itf *exti; | |
454 | ||
455 | /* Find Extended Prefix interface */ | |
456 | exti = lookup_ext_by_ifp(ifp); | |
457 | if (exti == NULL) | |
458 | return rc; | |
459 | ||
460 | if (p != NULL) { | |
461 | if (IS_DEBUG_OSPF_SR) | |
462 | zlog_debug( | |
7743f2f8 OD |
463 | "EXT (%s): Schedule new prefix %s/%u with " |
464 | "index %u on interface %s", | |
465 | __func__, inet_ntoa(p->prefix), p->prefixlen, | |
466 | index, ifp->name); | |
cf9b9f77 OD |
467 | |
468 | /* Set first Extended Prefix then the Prefix SID information */ | |
469 | set_ext_prefix(exti, OSPF_PATH_INTRA_AREA, EXT_TLV_PREF_NFLG, | |
470 | *p); | |
7743f2f8 | 471 | set_prefix_sid(exti, SR_ALGORITHM_SPF, index, SID_INDEX, flags); |
cf9b9f77 OD |
472 | |
473 | /* Try to Schedule LSA */ | |
474 | SET_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE); | |
475 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) | |
476 | ospf_ext_pref_lsa_schedule(exti, REFRESH_THIS_LSA); | |
477 | else | |
478 | ospf_ext_pref_lsa_schedule(exti, REORIGINATE_THIS_LSA); | |
479 | } else { | |
480 | if (IS_DEBUG_OSPF_SR) | |
996c9314 LB |
481 | zlog_debug("EXT (%s): Remove prefix for interface %s", |
482 | __func__, ifp->name); | |
cf9b9f77 OD |
483 | |
484 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) { | |
485 | ospf_ext_pref_lsa_schedule(exti, FLUSH_THIS_LSA); | |
486 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); | |
487 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE); | |
488 | } | |
489 | } | |
490 | ||
db28a51f | 491 | return SET_OPAQUE_LSID(exti->type, exti->instance); |
cf9b9f77 OD |
492 | } |
493 | ||
494 | /* | |
495 | * Used by Segment Routing to activate/deactivate Extended Link/Prefix flooding | |
496 | * | |
497 | * @param enable To activate or not Segment Routing Extended LSA flooding | |
498 | * | |
499 | * @return none | |
500 | */ | |
501 | void ospf_ext_update_sr(bool enable) | |
502 | { | |
503 | struct listnode *node; | |
504 | struct ext_itf *exti; | |
505 | ||
506 | if (IS_DEBUG_OSPF_SR) | |
996c9314 LB |
507 | zlog_debug("EXT (%s): %s Extended LSAs for Segment Routing ", |
508 | __func__, enable ? "Enable" : "Disable"); | |
cf9b9f77 OD |
509 | |
510 | if (enable) { | |
511 | OspfEXT.enabled = true; | |
512 | /* Refresh LSAs if already engaged or originate */ | |
513 | for (ALL_LIST_ELEMENTS_RO(OspfEXT.iflist, node, exti)) | |
514 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) | |
515 | ospf_ext_lsa_schedule(exti, REFRESH_THIS_LSA); | |
516 | else | |
517 | ospf_ext_lsa_schedule(exti, | |
518 | REORIGINATE_THIS_LSA); | |
519 | } else { | |
520 | /* Start by Flushing engaged LSAs */ | |
521 | for (ALL_LIST_ELEMENTS_RO(OspfEXT.iflist, node, exti)) | |
522 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) | |
523 | ospf_ext_lsa_schedule(exti, FLUSH_THIS_LSA); | |
524 | /* And then disable Extended Link/Prefix */ | |
525 | OspfEXT.enabled = false; | |
526 | } | |
527 | } | |
7743f2f8 OD |
528 | /* |
529 | * ----------------------------------------------------------------------- | |
530 | * Followings are callback functions against generic Opaque-LSAs handling | |
531 | * ----------------------------------------------------------------------- | |
532 | */ | |
cf9b9f77 OD |
533 | |
534 | /* Add new Interface in Extended Interface List */ | |
535 | static int ospf_ext_link_new_if(struct interface *ifp) | |
536 | { | |
537 | struct ext_itf *new; | |
538 | int rc = -1; | |
539 | ||
540 | if (lookup_ext_by_ifp(ifp) != NULL) { | |
cf9b9f77 OD |
541 | rc = 0; /* Do nothing here. */ |
542 | return rc; | |
543 | } | |
544 | ||
545 | new = XCALLOC(MTYPE_OSPF_EXT_PARAMS, sizeof(struct ext_itf)); | |
cf9b9f77 OD |
546 | |
547 | /* initialize new information and link back the interface */ | |
548 | new->ifp = ifp; | |
549 | new->flags = EXT_LPFLG_LSA_INACTIVE; | |
550 | ||
551 | listnode_add(OspfEXT.iflist, new); | |
552 | ||
553 | rc = 0; | |
554 | return rc; | |
555 | } | |
556 | ||
557 | /* Remove existing Interface from Extended Interface List */ | |
558 | static int ospf_ext_link_del_if(struct interface *ifp) | |
559 | { | |
560 | struct ext_itf *exti; | |
561 | int rc = -1; | |
562 | ||
7743f2f8 OD |
563 | exti = lookup_ext_by_ifp(ifp); |
564 | if (exti != NULL) { | |
cf9b9f77 OD |
565 | struct list *iflist = OspfEXT.iflist; |
566 | ||
cf9b9f77 OD |
567 | /* Dequeue listnode entry from the list. */ |
568 | listnode_delete(iflist, exti); | |
569 | ||
cf9b9f77 OD |
570 | XFREE(MTYPE_OSPF_EXT_PARAMS, exti); |
571 | ||
572 | rc = 0; | |
573 | } else { | |
cf444bcf | 574 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 575 | "EXT (%s): interface %s is not found", __func__, |
996c9314 | 576 | ifp ? ifp->name : "-"); |
cf9b9f77 OD |
577 | } |
578 | ||
579 | return rc; | |
580 | } | |
581 | ||
7743f2f8 OD |
582 | /* |
583 | * Determine if an Interface belongs to an Extended Link Adjacency or LAN Adj. | |
584 | * type and allocate new instance value accordingly | |
585 | */ | |
586 | static void ospf_ext_link_ism_change(struct ospf_interface *oi, int old_status) | |
cf9b9f77 OD |
587 | { |
588 | struct ext_itf *exti; | |
cf9b9f77 | 589 | |
7743f2f8 OD |
590 | /* Get interface information for Segment Routing */ |
591 | exti = lookup_ext_by_ifp(oi->ifp); | |
89f60109 | 592 | if (exti == NULL) |
7743f2f8 | 593 | return; |
cf9b9f77 | 594 | |
7743f2f8 OD |
595 | /* Determine if interface is related to Adjacency or LAN Adj. SID */ |
596 | if (oi->type != OSPF_IFTYPE_LOOPBACK) { | |
597 | if (oi->state == ISM_DR) | |
598 | exti->stype = LAN_ADJ_SID; | |
599 | else | |
600 | exti->stype = ADJ_SID; | |
cf9b9f77 | 601 | |
7743f2f8 | 602 | exti->instance = get_ext_link_instance_value(); |
db28a51f | 603 | exti->type = OPAQUE_TYPE_EXTENDED_LINK_LSA; |
cf9b9f77 | 604 | |
996c9314 LB |
605 | zlog_debug("EXT (%s): Set %s SID to interface %s ", __func__, |
606 | exti->stype == ADJ_SID ? "Adj." : "LAN Adj.", | |
607 | oi->ifp->name); | |
cf9b9f77 | 608 | } |
cf9b9f77 OD |
609 | } |
610 | ||
611 | /* | |
7743f2f8 | 612 | * Determine if an Interface belongs to an Extended Prefix and |
cf9b9f77 OD |
613 | * allocate new instance value accordingly |
614 | */ | |
7743f2f8 | 615 | static void ospf_ext_pref_ism_change(struct ospf_interface *oi, int old_status) |
cf9b9f77 OD |
616 | { |
617 | struct ext_itf *exti; | |
618 | ||
619 | /* Get interface information for Segment Routing */ | |
7743f2f8 OD |
620 | exti = lookup_ext_by_ifp(oi->ifp); |
621 | if (exti == NULL) { | |
cf444bcf | 622 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 623 | "EXT (%s): Cannot get Extended info. from OI(%s)", |
996c9314 | 624 | __func__, IF_NAME(oi)); |
cf9b9f77 OD |
625 | return; |
626 | } | |
627 | ||
7743f2f8 | 628 | /* Determine if interface is related to a Node SID */ |
cf9b9f77 OD |
629 | if (oi->type == OSPF_IFTYPE_LOOPBACK) { |
630 | exti->stype = PREF_SID; | |
631 | exti->instance = get_ext_pref_instance_value(); | |
db28a51f | 632 | exti->type = OPAQUE_TYPE_EXTENDED_PREFIX_LSA; |
7743f2f8 | 633 | |
996c9314 LB |
634 | zlog_debug("EXT (%s): Set Node SID to interface %s ", __func__, |
635 | oi->ifp->name); | |
7743f2f8 OD |
636 | |
637 | /* Complete SRDB if the interface belongs to a Prefix */ | |
62c99790 OD |
638 | if (OspfEXT.enabled) |
639 | ospf_sr_update_prefix(oi->ifp, oi->address); | |
cf9b9f77 | 640 | } |
cf9b9f77 OD |
641 | } |
642 | ||
643 | /* | |
644 | * Finish Extended Link configuration and flood corresponding LSA | |
645 | * when OSPF adjacency on this link fire up | |
646 | */ | |
647 | static void ospf_ext_link_nsm_change(struct ospf_neighbor *nbr, int old_status) | |
648 | { | |
649 | struct ospf_interface *oi = nbr->oi; | |
650 | struct ext_itf *exti; | |
93f0a26e | 651 | uint32_t label; |
cf9b9f77 OD |
652 | |
653 | /* Process Neighbor only when its state is NSM Full */ | |
654 | if (nbr->state != NSM_Full) | |
655 | return; | |
656 | ||
657 | /* Get interface information for Segment Routing */ | |
7743f2f8 OD |
658 | exti = lookup_ext_by_ifp(oi->ifp); |
659 | if (exti == NULL) { | |
cf444bcf | 660 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 661 | "EXT (%s): Cannot get Extended info. from OI(%s)", |
996c9314 | 662 | __func__, IF_NAME(oi)); |
cf9b9f77 OD |
663 | return; |
664 | } | |
665 | ||
666 | if (oi->area == NULL || oi->area->ospf == NULL) { | |
cf444bcf | 667 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 668 | "EXT (%s): Cannot refer to OSPF from OI(%s)", |
996c9314 | 669 | __func__, IF_NAME(oi)); |
cf9b9f77 OD |
670 | return; |
671 | } | |
672 | ||
673 | /* Keep Area information in combination with SR info. */ | |
674 | exti->area = oi->area; | |
675 | OspfEXT.area = oi->area; | |
676 | ||
677 | /* Process only Adjacency/LAN SID */ | |
678 | if (exti->stype == PREF_SID) | |
679 | return; | |
680 | ||
681 | switch (oi->state) { | |
682 | case ISM_PointToPoint: | |
683 | /* Segment ID is an Adjacency one */ | |
684 | exti->stype = ADJ_SID; | |
685 | ||
686 | /* Set Extended Link TLV with link_id == Nbr Router ID */ | |
687 | set_ext_link(exti, OSPF_IFTYPE_POINTOPOINT, nbr->router_id, | |
688 | oi->address->u.prefix4); | |
689 | ||
690 | /* Set Extended Link Adjacency SubTLVs, backup first */ | |
691 | label = get_ext_link_label_value(); | |
692 | set_adj_sid(exti, true, label, SID_LABEL); | |
693 | label = get_ext_link_label_value(); | |
694 | set_adj_sid(exti, false, label, SID_LABEL); | |
695 | /* And Remote Interface address */ | |
696 | set_rmt_itf_addr(exti, nbr->address.u.prefix4); | |
697 | ||
698 | break; | |
699 | ||
700 | case ISM_DR: | |
701 | /* Segment ID is a LAN Adjacency for the DR only */ | |
702 | exti->stype = LAN_ADJ_SID; | |
703 | ||
704 | /* Set Extended Link TLV with link_id == DR */ | |
705 | set_ext_link(exti, OSPF_IFTYPE_BROADCAST, DR(oi), | |
706 | oi->address->u.prefix4); | |
707 | ||
708 | /* Set Extended Link Adjacency SubTLVs, backup first */ | |
709 | label = get_ext_link_label_value(); | |
710 | set_lan_adj_sid(exti, true, label, SID_LABEL, nbr->router_id); | |
711 | label = get_ext_link_label_value(); | |
712 | set_lan_adj_sid(exti, false, label, SID_LABEL, nbr->router_id); | |
713 | ||
714 | break; | |
715 | ||
716 | case ISM_DROther: | |
717 | case ISM_Backup: | |
718 | /* Segment ID is an Adjacency if not the DR */ | |
719 | exti->stype = ADJ_SID; | |
720 | ||
721 | /* Set Extended Link TLV with link_id == DR */ | |
722 | set_ext_link(exti, OSPF_IFTYPE_BROADCAST, DR(oi), | |
723 | oi->address->u.prefix4); | |
724 | ||
725 | /* Set Extended Link Adjacency SubTLVs, backup first */ | |
726 | label = get_ext_link_label_value(); | |
727 | set_adj_sid(exti, true, label, SID_LABEL); | |
728 | label = get_ext_link_label_value(); | |
729 | set_adj_sid(exti, false, label, SID_LABEL); | |
730 | ||
731 | break; | |
732 | ||
733 | default: | |
734 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) { | |
735 | ospf_ext_link_lsa_schedule(exti, FLUSH_THIS_LSA); | |
736 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); | |
737 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE); | |
738 | } | |
739 | return; | |
740 | } | |
741 | ||
7743f2f8 | 742 | if (IS_DEBUG_OSPF_SR) |
996c9314 LB |
743 | zlog_debug("EXT (%s): Complete %s SID to interface %s ", |
744 | __func__, | |
745 | exti->stype == ADJ_SID ? "Adj." : "LAN Adj.", | |
746 | oi->ifp->name); | |
7743f2f8 | 747 | |
cf9b9f77 OD |
748 | /* flood this links params if everything is ok */ |
749 | SET_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE); | |
750 | if (OspfEXT.enabled) { | |
751 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) | |
752 | ospf_ext_link_lsa_schedule(exti, REFRESH_THIS_LSA); | |
753 | else | |
754 | ospf_ext_link_lsa_schedule(exti, REORIGINATE_THIS_LSA); | |
755 | } | |
cf9b9f77 OD |
756 | } |
757 | ||
758 | /* Callbacks to handle Extended Link Segment Routing LSA information */ | |
759 | static int ospf_ext_link_lsa_update(struct ospf_lsa *lsa) | |
760 | { | |
761 | /* Sanity Check */ | |
762 | if (lsa == NULL) { | |
cf444bcf | 763 | flog_warn(EC_OSPF_LSA_NULL, "EXT (%s): Abort! LSA is NULL", |
ade6974d | 764 | __func__); |
cf9b9f77 OD |
765 | return -1; |
766 | } | |
767 | ||
6aaf0fdd OD |
768 | /* Process only Opaque LSA */ |
769 | if ((lsa->data->type != OSPF_OPAQUE_AREA_LSA) | |
770 | && (lsa->data->type != OSPF_OPAQUE_AS_LSA)) | |
771 | return 0; | |
772 | ||
cf9b9f77 OD |
773 | /* Process only Extended Link LSA */ |
774 | if (GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr)) | |
775 | != OPAQUE_TYPE_EXTENDED_LINK_LSA) | |
776 | return 0; | |
777 | ||
778 | /* Check if Extended is enable */ | |
779 | if (!OspfEXT.enabled) | |
780 | return 0; | |
781 | ||
782 | /* Call Segment Routing LSA update or deletion */ | |
783 | if (!IS_LSA_MAXAGE(lsa)) | |
784 | ospf_sr_ext_link_lsa_update(lsa); | |
785 | else | |
786 | ospf_sr_ext_link_lsa_delete(lsa); | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | /* Callbacks to handle Extended Prefix Segment Routing LSA information */ | |
792 | static int ospf_ext_pref_lsa_update(struct ospf_lsa *lsa) | |
793 | { | |
794 | ||
795 | /* Sanity Check */ | |
796 | if (lsa == NULL) { | |
cf444bcf | 797 | flog_warn(EC_OSPF_LSA_NULL, "EXT (%s): Abort! LSA is NULL", |
ade6974d | 798 | __func__); |
cf9b9f77 OD |
799 | return -1; |
800 | } | |
801 | ||
6aaf0fdd OD |
802 | /* Process only Opaque LSA */ |
803 | if ((lsa->data->type != OSPF_OPAQUE_AREA_LSA) | |
804 | && (lsa->data->type != OSPF_OPAQUE_AS_LSA)) | |
7743f2f8 OD |
805 | return 0; |
806 | ||
cf9b9f77 OD |
807 | /* Process only Extended Prefix LSA */ |
808 | if (GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr)) | |
809 | != OPAQUE_TYPE_EXTENDED_PREFIX_LSA) | |
810 | return 0; | |
811 | ||
6aaf0fdd OD |
812 | /* Check if it is not my LSA */ |
813 | if (IS_LSA_SELF(lsa)) | |
814 | return 0; | |
815 | ||
cf9b9f77 OD |
816 | /* Check if Extended is enable */ |
817 | if (!OspfEXT.enabled) | |
818 | return 0; | |
819 | ||
820 | /* Call Segment Routing LSA update or deletion */ | |
821 | if (!IS_LSA_MAXAGE(lsa)) | |
822 | ospf_sr_ext_prefix_lsa_update(lsa); | |
823 | else | |
824 | ospf_sr_ext_prefix_lsa_delete(lsa); | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
7743f2f8 OD |
829 | /* |
830 | * ------------------------------------------------------- | |
cf9b9f77 OD |
831 | * Followings are OSPF protocol processing functions for |
832 | * Extended Prefix/Link Opaque LSA | |
7743f2f8 OD |
833 | * ------------------------------------------------------- |
834 | */ | |
cf9b9f77 OD |
835 | |
836 | static void build_tlv_header(struct stream *s, struct tlv_header *tlvh) | |
837 | { | |
838 | stream_put(s, tlvh, sizeof(struct tlv_header)); | |
cf9b9f77 OD |
839 | } |
840 | ||
841 | static void build_tlv(struct stream *s, struct tlv_header *tlvh) | |
842 | { | |
843 | ||
844 | if ((tlvh != NULL) && (ntohs(tlvh->type) != 0)) { | |
845 | build_tlv_header(s, tlvh); | |
846 | stream_put(s, TLV_DATA(tlvh), TLV_BODY_SIZE(tlvh)); | |
847 | } | |
cf9b9f77 OD |
848 | } |
849 | ||
850 | /* Build an Extended Prefix Opaque LSA body for extended prefix TLV */ | |
851 | static void ospf_ext_pref_lsa_body_set(struct stream *s, struct ext_itf *exti) | |
852 | { | |
853 | ||
854 | /* Sanity check */ | |
855 | if ((exti == NULL) || (exti->stype != PREF_SID)) | |
856 | return; | |
857 | ||
858 | /* Adjust Extended Prefix TLV size */ | |
996c9314 LB |
859 | TLV_LEN(exti->prefix) = htons(ntohs(TLV_LEN(exti->node_sid)) |
860 | + EXT_TLV_PREFIX_SIZE + TLV_HDR_SIZE); | |
cf9b9f77 OD |
861 | |
862 | /* Build LSA body for an Extended Prefix TLV */ | |
863 | build_tlv_header(s, &exti->prefix.header); | |
864 | stream_put(s, TLV_DATA(&exti->prefix.header), EXT_TLV_PREFIX_SIZE); | |
865 | /* Then add Prefix SID SubTLV */ | |
866 | build_tlv(s, &exti->node_sid.header); | |
cf9b9f77 OD |
867 | } |
868 | ||
869 | /* Build an Extended Link Opaque LSA body for extended link TLV */ | |
870 | static void ospf_ext_link_lsa_body_set(struct stream *s, struct ext_itf *exti) | |
871 | { | |
7743f2f8 | 872 | size_t size; |
cf9b9f77 OD |
873 | |
874 | /* Sanity check */ | |
875 | if ((exti == NULL) | |
876 | || ((exti->stype != ADJ_SID) && (exti->stype != LAN_ADJ_SID))) | |
877 | return; | |
878 | ||
879 | if (exti->stype == ADJ_SID) { | |
880 | /* Adjust Extended Link TLV size for Adj. SID */ | |
7743f2f8 | 881 | size = EXT_TLV_LINK_SIZE + 2 * EXT_SUBTLV_ADJ_SID_SIZE |
996c9314 | 882 | + 2 * TLV_HDR_SIZE; |
7743f2f8 OD |
883 | if (ntohs(TLV_TYPE(exti->rmt_itf_addr)) != 0) |
884 | size = size + EXT_SUBTLV_RMT_ITF_ADDR_SIZE | |
996c9314 | 885 | + TLV_HDR_SIZE; |
7743f2f8 | 886 | TLV_LEN(exti->link) = htons(size); |
cf9b9f77 OD |
887 | |
888 | /* Build LSA body for an Extended Link TLV with Adj. SID */ | |
889 | build_tlv_header(s, &exti->link.header); | |
890 | stream_put(s, TLV_DATA(&exti->link.header), EXT_TLV_LINK_SIZE); | |
d922605d | 891 | /* then add Adjacency SubTLVs */ |
cf9b9f77 OD |
892 | build_tlv(s, &exti->adj_sid[1].header); |
893 | build_tlv(s, &exti->adj_sid[0].header); | |
7743f2f8 OD |
894 | |
895 | /* Add Cisco experimental SubTLV if interface is PtoP */ | |
896 | if (ntohs(TLV_TYPE(exti->rmt_itf_addr)) != 0) | |
897 | build_tlv(s, &exti->rmt_itf_addr.header); | |
cf9b9f77 OD |
898 | } else { |
899 | /* Adjust Extended Link TLV size for LAN SID */ | |
7743f2f8 | 900 | size = EXT_TLV_LINK_SIZE |
996c9314 | 901 | + 2 * (EXT_SUBTLV_LAN_ADJ_SID_SIZE + TLV_HDR_SIZE); |
7743f2f8 | 902 | TLV_LEN(exti->link) = htons(size); |
cf9b9f77 OD |
903 | |
904 | /* Build LSA body for an Extended Link TLV with LAN SID */ | |
905 | build_tlv_header(s, &exti->link.header); | |
d922605d OD |
906 | stream_put(s, TLV_DATA(&exti->link.header), EXT_TLV_LINK_SIZE); |
907 | /* then add LAN-Adjacency SubTLVs */ | |
cf9b9f77 OD |
908 | build_tlv(s, &exti->lan_sid[1].header); |
909 | build_tlv(s, &exti->lan_sid[0].header); | |
910 | } | |
cf9b9f77 OD |
911 | } |
912 | ||
913 | /* Create new Extended Prefix opaque-LSA for every extended prefix */ | |
914 | static struct ospf_lsa *ospf_ext_pref_lsa_new(struct ospf_area *area, | |
915 | struct ext_itf *exti) | |
916 | { | |
917 | struct stream *s; | |
918 | struct lsa_header *lsah; | |
919 | struct ospf_lsa *new = NULL; | |
7743f2f8 | 920 | struct ospf *top; |
d7c0a89a | 921 | uint8_t options, lsa_type; |
cf9b9f77 OD |
922 | struct in_addr lsa_id; |
923 | struct in_addr router_id; | |
93f0a26e OD |
924 | uint32_t tmp; |
925 | uint16_t length; | |
cf9b9f77 | 926 | |
fd3b19f2 OD |
927 | /* Sanity Check */ |
928 | if (exti == NULL) | |
929 | return NULL; | |
930 | ||
cf9b9f77 | 931 | /* Create a stream for LSA. */ |
7743f2f8 | 932 | s = stream_new(OSPF_MAX_LSA_SIZE); |
cf9b9f77 OD |
933 | |
934 | /* Prepare LSA Header */ | |
935 | lsah = (struct lsa_header *)STREAM_DATA(s); | |
936 | ||
937 | lsa_type = OspfEXT.scope; | |
938 | ||
7743f2f8 OD |
939 | /* |
940 | * LSA ID is a variable number identifying different instances of | |
941 | * Extended Prefix Opaque LSA from the same router see RFC 7684 | |
942 | */ | |
cf9b9f77 OD |
943 | tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_PREFIX_LSA, exti->instance); |
944 | lsa_id.s_addr = htonl(tmp); | |
945 | ||
946 | options = OSPF_OPTION_O; /* Don't forget this :-) */ | |
947 | ||
948 | /* Fix Options and Router ID depending of the flooding scope */ | |
949 | if ((OspfEXT.scope == OSPF_OPAQUE_AS_LSA) || (area == NULL)) { | |
950 | options = OSPF_OPTION_E; | |
7743f2f8 OD |
951 | top = ospf_lookup_by_vrf_id(VRF_DEFAULT); |
952 | router_id.s_addr = top ? top->router_id.s_addr : 0; | |
cf9b9f77 OD |
953 | } else { |
954 | options |= LSA_OPTIONS_GET(area); /* Get area default option */ | |
955 | options |= LSA_OPTIONS_NSSA_GET(area); | |
956 | router_id = area->ospf->router_id; | |
957 | } | |
958 | ||
959 | /* Set opaque-LSA header fields. */ | |
960 | lsa_header_set(s, options, lsa_type, lsa_id, router_id); | |
961 | ||
962 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
963 | zlog_debug( | |
7743f2f8 OD |
964 | "EXT (%s): LSA[Type%u:%s]: Create an Opaque-LSA " |
965 | "Extended Prefix Opaque LSA instance", | |
966 | __func__, lsa_type, inet_ntoa(lsa_id)); | |
cf9b9f77 OD |
967 | |
968 | ||
969 | /* Set opaque-LSA body fields. */ | |
970 | ospf_ext_pref_lsa_body_set(s, exti); | |
971 | ||
972 | /* Set length. */ | |
973 | length = stream_get_endp(s); | |
974 | lsah->length = htons(length); | |
975 | ||
976 | /* Now, create an OSPF LSA instance. */ | |
5b3d4186 | 977 | new = ospf_lsa_new_and_data(length); |
cf9b9f77 | 978 | |
7743f2f8 OD |
979 | /* Segment Routing belongs only to default VRF */ |
980 | new->vrf_id = VRF_DEFAULT; | |
cf9b9f77 OD |
981 | new->area = area; |
982 | SET_FLAG(new->flags, OSPF_LSA_SELF); | |
983 | memcpy(new->data, lsah, length); | |
984 | stream_free(s); | |
985 | ||
986 | return new; | |
987 | } | |
988 | ||
989 | /* Create new Extended Link opaque-LSA for every extended link TLV */ | |
990 | static struct ospf_lsa *ospf_ext_link_lsa_new(struct ospf_area *area, | |
991 | struct ext_itf *exti) | |
992 | { | |
993 | struct stream *s; | |
994 | struct lsa_header *lsah; | |
995 | struct ospf_lsa *new = NULL; | |
d7c0a89a | 996 | uint8_t options, lsa_type; |
cf9b9f77 | 997 | struct in_addr lsa_id; |
93f0a26e OD |
998 | uint32_t tmp; |
999 | uint16_t length; | |
cf9b9f77 | 1000 | |
fd3b19f2 OD |
1001 | /* Sanity Check */ |
1002 | if (exti == NULL) | |
1003 | return NULL; | |
1004 | ||
cf9b9f77 | 1005 | /* Create a stream for LSA. */ |
7743f2f8 | 1006 | s = stream_new(OSPF_MAX_LSA_SIZE); |
cf9b9f77 OD |
1007 | lsah = (struct lsa_header *)STREAM_DATA(s); |
1008 | ||
1009 | options = OSPF_OPTION_O; /* Don't forget this :-) */ | |
1010 | options |= LSA_OPTIONS_GET(area); /* Get area default option */ | |
1011 | options |= LSA_OPTIONS_NSSA_GET(area); | |
1012 | /* Extended Link Opaque LSA are only flooded within an area */ | |
1013 | lsa_type = OSPF_OPAQUE_AREA_LSA; | |
1014 | ||
7743f2f8 OD |
1015 | /* |
1016 | * LSA ID is a variable number identifying different instances of | |
1017 | * Extended Link Opaque LSA from the same router see RFC 7684 | |
1018 | */ | |
cf9b9f77 OD |
1019 | tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_LINK_LSA, exti->instance); |
1020 | lsa_id.s_addr = htonl(tmp); | |
1021 | ||
1022 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1023 | zlog_debug( | |
7743f2f8 OD |
1024 | "EXT (%s) LSA[Type%u:%s]: Create an Opaque-LSA " |
1025 | "Extended Link Opaque LSA instance", | |
1026 | __func__, lsa_type, inet_ntoa(lsa_id)); | |
cf9b9f77 OD |
1027 | |
1028 | /* Set opaque-LSA header fields. */ | |
1029 | lsa_header_set(s, options, lsa_type, lsa_id, area->ospf->router_id); | |
1030 | ||
1031 | /* Set opaque-LSA body fields. */ | |
1032 | ospf_ext_link_lsa_body_set(s, exti); | |
1033 | ||
1034 | /* Set length. */ | |
1035 | length = stream_get_endp(s); | |
1036 | lsah->length = htons(length); | |
1037 | ||
1038 | /* Now, create an OSPF LSA instance. */ | |
5b3d4186 | 1039 | new = ospf_lsa_new_and_data(length); |
cf9b9f77 | 1040 | |
7743f2f8 OD |
1041 | /* Segment Routing belongs only to default VRF */ |
1042 | new->vrf_id = VRF_DEFAULT; | |
cf9b9f77 OD |
1043 | new->area = area; |
1044 | SET_FLAG(new->flags, OSPF_LSA_SELF); | |
1045 | memcpy(new->data, lsah, length); | |
1046 | stream_free(s); | |
1047 | ||
1048 | return new; | |
1049 | } | |
1050 | ||
7743f2f8 OD |
1051 | /* |
1052 | * Process the origination of an Extended Prefix Opaque LSA | |
1053 | * for every extended prefix TLV | |
1054 | */ | |
cf9b9f77 OD |
1055 | static int ospf_ext_pref_lsa_originate1(struct ospf_area *area, |
1056 | struct ext_itf *exti) | |
1057 | { | |
1058 | struct ospf_lsa *new; | |
1059 | int rc = -1; | |
1060 | ||
1061 | ||
1062 | /* Create new Opaque-LSA/Extended Prefix Opaque LSA instance. */ | |
7743f2f8 OD |
1063 | new = ospf_ext_pref_lsa_new(area, exti); |
1064 | if (new == NULL) { | |
cf444bcf | 1065 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1066 | "EXT (%s): ospf_ext_pref_lsa_new() error", __func__); |
cf9b9f77 OD |
1067 | return rc; |
1068 | } | |
1069 | ||
1070 | /* Install this LSA into LSDB. */ | |
1071 | if (ospf_lsa_install(area->ospf, NULL /*oi */, new) == NULL) { | |
cf444bcf | 1072 | flog_warn(EC_OSPF_LSA_INSTALL_FAILURE, |
542a208f | 1073 | "EXT (%s): ospf_lsa_install() error", __func__); |
cf9b9f77 OD |
1074 | ospf_lsa_unlock(&new); |
1075 | return rc; | |
1076 | } | |
1077 | ||
1078 | /* Now this Extended Prefix Opaque LSA info parameter entry has | |
7743f2f8 OD |
1079 | * associated LSA. |
1080 | */ | |
cf9b9f77 OD |
1081 | SET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); |
1082 | ||
1083 | /* Update new LSA origination count. */ | |
1084 | area->ospf->lsa_originate_count++; | |
1085 | ||
1086 | /* Flood new LSA through area. */ | |
1087 | ospf_flood_through_area(area, NULL /*nbr */, new); | |
1088 | ||
1089 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1090 | char area_id[INET_ADDRSTRLEN]; | |
7743f2f8 | 1091 | |
e4407ea6 | 1092 | inet_ntop(AF_INET, &area->area_id, area_id, sizeof(area_id)); |
cf9b9f77 | 1093 | zlog_debug( |
7743f2f8 OD |
1094 | "EXT (%s): LSA[Type%u:%s]: Originate Opaque-LSA " |
1095 | "Extended Prefix Opaque LSA: Area(%s), Link(%s)", | |
1096 | __func__, new->data->type, inet_ntoa(new->data->id), | |
1097 | area_id, exti->ifp->name); | |
cf9b9f77 OD |
1098 | ospf_lsa_header_dump(new->data); |
1099 | } | |
1100 | ||
1101 | rc = 0; | |
1102 | ||
1103 | return rc; | |
1104 | } | |
1105 | ||
7743f2f8 OD |
1106 | /* |
1107 | * Process the origination of an Extended Link Opaque LSA | |
1108 | * for every extended link TLV | |
1109 | */ | |
cf9b9f77 OD |
1110 | static int ospf_ext_link_lsa_originate1(struct ospf_area *area, |
1111 | struct ext_itf *exti) | |
1112 | { | |
1113 | struct ospf_lsa *new; | |
1114 | int rc = -1; | |
1115 | ||
1116 | /* Create new Opaque-LSA/Extended Link Opaque LSA instance. */ | |
7743f2f8 OD |
1117 | new = ospf_ext_link_lsa_new(area, exti); |
1118 | if (new == NULL) { | |
cf444bcf | 1119 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1120 | "EXT (%s): ospf_ext_link_lsa_new() error", __func__); |
cf9b9f77 OD |
1121 | return rc; |
1122 | } | |
1123 | ||
1124 | /* Install this LSA into LSDB. */ | |
1125 | if (ospf_lsa_install(area->ospf, NULL /*oi */, new) == NULL) { | |
cf444bcf | 1126 | flog_warn(EC_OSPF_LSA_INSTALL_FAILURE, |
542a208f | 1127 | "EXT (%s): ospf_lsa_install() error", __func__); |
cf9b9f77 OD |
1128 | ospf_lsa_unlock(&new); |
1129 | return rc; | |
1130 | } | |
1131 | ||
1132 | /* Now this link-parameter entry has associated LSA. */ | |
1133 | SET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); | |
1134 | ||
1135 | /* Update new LSA origination count. */ | |
1136 | area->ospf->lsa_originate_count++; | |
1137 | ||
1138 | /* Flood new LSA through area. */ | |
1139 | ospf_flood_through_area(area, NULL /*nbr */, new); | |
1140 | ||
1141 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1142 | char area_id[INET_ADDRSTRLEN]; | |
7743f2f8 | 1143 | |
e4407ea6 | 1144 | inet_ntop(AF_INET, &area->area_id, area_id, sizeof(area_id)); |
cf9b9f77 | 1145 | zlog_debug( |
7743f2f8 OD |
1146 | "EXT (%s): LSA[Type%u:%s]: Originate Opaque-LSA " |
1147 | "Extended Link Opaque LSA: Area(%s), Link(%s)", | |
996c9314 LB |
1148 | __func__, new->data->type, inet_ntoa(new->data->id), |
1149 | area_id, exti->ifp->name); | |
cf9b9f77 OD |
1150 | ospf_lsa_header_dump(new->data); |
1151 | } | |
1152 | ||
1153 | rc = 0; | |
1154 | ||
1155 | return rc; | |
1156 | } | |
1157 | ||
1158 | /* Trigger the origination of Extended Prefix Opaque LSAs */ | |
1159 | static int ospf_ext_pref_lsa_originate(void *arg) | |
1160 | { | |
1161 | struct ospf_area *area = (struct ospf_area *)arg; | |
1162 | struct listnode *node; | |
1163 | struct ext_itf *exti; | |
1164 | int rc = -1; | |
1165 | ||
1166 | if (!OspfEXT.enabled) { | |
1167 | zlog_info( | |
7743f2f8 | 1168 | "EXT (%s): Segment Routing " |
996c9314 LB |
1169 | "functionality is Disabled now", |
1170 | __func__); | |
cf9b9f77 OD |
1171 | rc = 0; /* This is not an error case. */ |
1172 | return rc; | |
1173 | } | |
1174 | if (IS_DEBUG_OSPF_SR) | |
996c9314 LB |
1175 | zlog_debug("EXT (%s): Start Originate Prefix LSA for area %s", |
1176 | __func__, inet_ntoa(area->area_id)); | |
cf9b9f77 OD |
1177 | |
1178 | /* Check if Extended Prefix Opaque LSA is already engaged */ | |
1179 | for (ALL_LIST_ELEMENTS_RO(OspfEXT.iflist, node, exti)) { | |
1180 | ||
1181 | /* Process only Prefix SID */ | |
1182 | if (exti->stype != PREF_SID) | |
1183 | continue; | |
1184 | ||
1185 | /* Process only Extended Prefix with valid Area ID */ | |
1186 | if ((exti->area == NULL) | |
1187 | || (!IPV4_ADDR_SAME(&exti->area->area_id, &area->area_id))) | |
1188 | continue; | |
1189 | ||
1190 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) { | |
1191 | if (CHECK_FLAG(exti->flags, | |
1192 | EXT_LPFLG_LSA_FORCED_REFRESH)) { | |
ade6974d | 1193 | flog_warn( |
cf444bcf | 1194 | EC_OSPF_EXT_LSA_UNEXPECTED, |
ade6974d | 1195 | "EXT (%s): Refresh instead of Originate", |
996c9314 | 1196 | __func__); |
cf9b9f77 OD |
1197 | UNSET_FLAG(exti->flags, |
1198 | EXT_LPFLG_LSA_FORCED_REFRESH); | |
1199 | ospf_ext_pref_lsa_schedule(exti, | |
1200 | REFRESH_THIS_LSA); | |
1201 | } | |
1202 | continue; | |
1203 | } | |
1204 | ||
1205 | /* Ok, let's try to originate an LSA */ | |
1206 | if (IS_DEBUG_OSPF_SR) | |
1207 | zlog_debug( | |
7743f2f8 OD |
1208 | "EXT (%s): Let's finally reoriginate the " |
1209 | "LSA 7.0.0.%u for Itf %s", | |
1210 | __func__, exti->instance, | |
cf9b9f77 OD |
1211 | exti->ifp ? exti->ifp->name : ""); |
1212 | ospf_ext_pref_lsa_originate1(area, exti); | |
1213 | } | |
1214 | ||
1215 | rc = 0; | |
1216 | return rc; | |
1217 | } | |
1218 | ||
1219 | /* Trigger the origination of Extended Link Opaque LSAs */ | |
1220 | static int ospf_ext_link_lsa_originate(void *arg) | |
1221 | { | |
1222 | struct ospf_area *area = (struct ospf_area *)arg; | |
1223 | struct listnode *node; | |
1224 | struct ext_itf *exti; | |
1225 | int rc = -1; | |
1226 | ||
1227 | if (!OspfEXT.enabled) { | |
1228 | zlog_info( | |
7743f2f8 | 1229 | "EXT (%s): Segment Routing " |
996c9314 LB |
1230 | "functionality is Disabled now", |
1231 | __func__); | |
cf9b9f77 OD |
1232 | rc = 0; /* This is not an error case. */ |
1233 | return rc; | |
1234 | } | |
1235 | ||
1236 | /* Check if Extended Prefix Opaque LSA is already engaged */ | |
1237 | for (ALL_LIST_ELEMENTS_RO(OspfEXT.iflist, node, exti)) { | |
1238 | /* Process only Adjacency or LAN SID */ | |
1239 | if (exti->stype == PREF_SID) | |
1240 | continue; | |
1241 | ||
1242 | /* Process only Extended Link with valid Area ID */ | |
1243 | if ((exti->area == NULL) | |
1244 | || (!IPV4_ADDR_SAME(&exti->area->area_id, &area->area_id))) | |
1245 | continue; | |
1246 | ||
1247 | /* Check if LSA not already engaged */ | |
1248 | if (CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED)) { | |
1249 | if (CHECK_FLAG(exti->flags, | |
1250 | EXT_LPFLG_LSA_FORCED_REFRESH)) { | |
ade6974d | 1251 | flog_warn( |
cf444bcf | 1252 | EC_OSPF_EXT_LSA_UNEXPECTED, |
ade6974d QY |
1253 | "EXT (%s): Refresh instead of Originate", |
1254 | __func__); | |
cf9b9f77 OD |
1255 | UNSET_FLAG(exti->flags, |
1256 | EXT_LPFLG_LSA_FORCED_REFRESH); | |
1257 | ospf_ext_link_lsa_schedule(exti, | |
1258 | REFRESH_THIS_LSA); | |
1259 | } | |
1260 | continue; | |
1261 | } | |
1262 | ||
1263 | /* Ok, let's try to originate an LSA */ | |
1264 | if (IS_DEBUG_OSPF_SR) | |
1265 | zlog_debug( | |
7743f2f8 OD |
1266 | "EXT (%s): Let's finally reoriginate the " |
1267 | "LSA 8.0.0.%u for Itf %s through the Area %s", | |
1268 | __func__, exti->instance, | |
cf9b9f77 OD |
1269 | exti->ifp ? exti->ifp->name : "-", |
1270 | inet_ntoa(area->area_id)); | |
1271 | ospf_ext_link_lsa_originate1(area, exti); | |
1272 | } | |
1273 | ||
1274 | rc = 0; | |
1275 | return rc; | |
1276 | } | |
1277 | ||
1278 | /* Refresh an Extended Prefix Opaque LSA */ | |
1279 | static struct ospf_lsa *ospf_ext_pref_lsa_refresh(struct ospf_lsa *lsa) | |
1280 | { | |
1281 | struct ospf_lsa *new = NULL; | |
1282 | struct ospf_area *area = lsa->area; | |
1283 | struct ospf *top; | |
1284 | struct ext_itf *exti; | |
1285 | ||
1286 | if (!OspfEXT.enabled) { | |
1287 | /* | |
1288 | * This LSA must have flushed before due to Extended Prefix | |
1289 | * Opaque LSA status change. | |
1290 | * It seems a slip among routers in the routing domain. | |
1291 | */ | |
7743f2f8 OD |
1292 | zlog_info( |
1293 | "EXT (%s): Segment Routing functionality is " | |
996c9314 LB |
1294 | "Disabled", |
1295 | __func__); | |
cf9b9f77 OD |
1296 | /* Flush it anyway. */ |
1297 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
1298 | } | |
1299 | ||
1300 | /* Lookup this lsa corresponding Extended parameters */ | |
7743f2f8 OD |
1301 | exti = lookup_ext_by_instance(lsa); |
1302 | if (exti == NULL) { | |
cf444bcf | 1303 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1304 | "EXT (%s): Invalid parameter LSA ID", __func__); |
cf9b9f77 OD |
1305 | /* Flush it anyway. */ |
1306 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
1307 | } | |
1308 | ||
1309 | /* Check if Interface was not disable in the interval */ | |
1310 | if ((exti != NULL) && !CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE)) { | |
cf444bcf | 1311 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1312 | "EXT (%s): Interface was Disabled: Flush it!", |
996c9314 | 1313 | __func__); |
cf9b9f77 OD |
1314 | /* Flush it anyway. */ |
1315 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
1316 | } | |
1317 | ||
1318 | /* If the lsa's age reached to MaxAge, start flushing procedure. */ | |
1319 | if (IS_LSA_MAXAGE(lsa)) { | |
1320 | if (exti) | |
1321 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); | |
1322 | ospf_opaque_lsa_flush_schedule(lsa); | |
1323 | return NULL; | |
1324 | } | |
1325 | ||
1326 | /* Create new Opaque-LSA/Extended Prefix Opaque LSA instance. */ | |
db28a51f | 1327 | new = ospf_ext_pref_lsa_new(area, exti); |
cf9b9f77 OD |
1328 | |
1329 | if (new == NULL) { | |
cf444bcf | 1330 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1331 | "EXT (%s): ospf_ext_pref_lsa_new() error", __func__); |
cf9b9f77 OD |
1332 | return NULL; |
1333 | } | |
1334 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
1335 | ||
7743f2f8 OD |
1336 | /* |
1337 | * Install this LSA into LSDB | |
1338 | * Given "lsa" will be freed in the next function | |
1339 | * As area could be NULL i.e. when using OPAQUE_LSA_AS, we prefer to use | |
1340 | * ospf_lookup() to get ospf instance | |
1341 | */ | |
cf9b9f77 OD |
1342 | if (area) |
1343 | top = area->ospf; | |
1344 | else | |
1345 | top = ospf_lookup_by_vrf_id(VRF_DEFAULT); | |
1346 | ||
1347 | if (ospf_lsa_install(top, NULL /*oi */, new) == NULL) { | |
cf444bcf | 1348 | flog_warn(EC_OSPF_LSA_INSTALL_FAILURE, |
542a208f | 1349 | "EXT (%s): ospf_lsa_install() error", __func__); |
cf9b9f77 OD |
1350 | ospf_lsa_unlock(&new); |
1351 | return NULL; | |
1352 | } | |
1353 | ||
1354 | /* Flood updated LSA through the Prefix Area according to the RFC7684 */ | |
1355 | ospf_flood_through_area(area, NULL /*nbr */, new); | |
1356 | ||
1357 | /* Debug logging. */ | |
1358 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
7743f2f8 OD |
1359 | zlog_debug( |
1360 | "EXT (%s): LSA[Type%u:%s] Refresh Extended Prefix LSA", | |
1361 | __func__, new->data->type, inet_ntoa(new->data->id)); | |
cf9b9f77 OD |
1362 | ospf_lsa_header_dump(new->data); |
1363 | } | |
1364 | ||
1365 | return new; | |
1366 | } | |
1367 | ||
1368 | /* Refresh an Extended Link Opaque LSA */ | |
1369 | static struct ospf_lsa *ospf_ext_link_lsa_refresh(struct ospf_lsa *lsa) | |
1370 | { | |
1371 | struct ext_itf *exti; | |
1372 | struct ospf_area *area = lsa->area; | |
1373 | struct ospf *top = area->ospf; | |
1374 | struct ospf_lsa *new = NULL; | |
1375 | ||
1376 | if (!OspfEXT.enabled) { | |
1377 | /* | |
1378 | * This LSA must have flushed before due to OSPF-SR status | |
1379 | * change. It seems a slip among routers in the routing domain. | |
1380 | */ | |
996c9314 LB |
1381 | zlog_info("EXT (%s): Segment Routing functionality is Disabled", |
1382 | __func__); | |
cf9b9f77 OD |
1383 | /* Flush it anyway. */ |
1384 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
1385 | } | |
1386 | ||
7743f2f8 OD |
1387 | /* Lookup this LSA corresponding Extended parameters */ |
1388 | exti = lookup_ext_by_instance(lsa); | |
1389 | if (exti == NULL) { | |
cf444bcf | 1390 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1391 | "EXT (%s): Invalid parameter LSA ID", __func__); |
cf9b9f77 OD |
1392 | /* Flush it anyway. */ |
1393 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
1394 | } | |
1395 | ||
1396 | /* Check if Interface was not disable in the interval */ | |
1397 | if ((exti != NULL) && !CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE)) { | |
cf444bcf | 1398 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1399 | "EXT (%s): Interface was Disabled: Flush it!", |
996c9314 | 1400 | __func__); |
cf9b9f77 OD |
1401 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); |
1402 | } | |
1403 | ||
7743f2f8 | 1404 | /* If the lsa's age reached to MaxAge, start flushing procedure */ |
cf9b9f77 OD |
1405 | if (IS_LSA_MAXAGE(lsa)) { |
1406 | if (exti) | |
1407 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); | |
1408 | ospf_opaque_lsa_flush_schedule(lsa); | |
1409 | return NULL; | |
1410 | } | |
1411 | ||
7743f2f8 OD |
1412 | /* Create new Opaque-LSA/Extended Link instance */ |
1413 | new = ospf_ext_link_lsa_new(area, exti); | |
1414 | if (new == NULL) { | |
cf444bcf | 1415 | flog_warn(EC_OSPF_EXT_LSA_UNEXPECTED, |
89f60109 | 1416 | "EXT (%s): Error creating new LSA", __func__); |
cf9b9f77 OD |
1417 | return NULL; |
1418 | } | |
1419 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
1420 | ||
1421 | /* Install this LSA into LSDB. */ | |
7743f2f8 | 1422 | /* Given "lsa" will be freed in the next function */ |
cf9b9f77 | 1423 | if (ospf_lsa_install(top, NULL /*oi */, new) == NULL) { |
cf444bcf | 1424 | flog_warn(EC_OSPF_LSA_INSTALL_FAILURE, |
542a208f | 1425 | "EXT (%s): Error installing new LSA", __func__); |
cf9b9f77 OD |
1426 | ospf_lsa_unlock(&new); |
1427 | return NULL; | |
1428 | } | |
1429 | ||
1430 | /* Flood updated LSA through the link Area according to the RFC7684 */ | |
1431 | ospf_flood_through_area(area, NULL /*nbr */, new); | |
1432 | ||
1433 | /* Debug logging. */ | |
1434 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1435 | zlog_debug( | |
7743f2f8 OD |
1436 | "EXT (%s): LSA[Type%u:%s]: Refresh Extended Link LSA", |
1437 | __func__, new->data->type, inet_ntoa(new->data->id)); | |
cf9b9f77 OD |
1438 | ospf_lsa_header_dump(new->data); |
1439 | } | |
1440 | ||
1441 | return new; | |
1442 | } | |
1443 | ||
1444 | /* Schedule Extended Prefix Opaque LSA origination/refreshment/flushing */ | |
1445 | static void ospf_ext_pref_lsa_schedule(struct ext_itf *exti, | |
1446 | enum lsa_opcode opcode) | |
1447 | { | |
1448 | struct ospf_lsa lsa; | |
1449 | struct lsa_header lsah; | |
1450 | struct ospf *top; | |
93f0a26e | 1451 | uint32_t tmp; |
cf9b9f77 OD |
1452 | |
1453 | memset(&lsa, 0, sizeof(lsa)); | |
1454 | memset(&lsah, 0, sizeof(lsah)); | |
1455 | ||
1456 | /* Sanity Check */ | |
1457 | if (exti == NULL) | |
1458 | return; | |
1459 | ||
1460 | /* Check if the corresponding link is ready to be flooded */ | |
1461 | if (!(CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE))) | |
1462 | return; | |
1463 | ||
996c9314 LB |
1464 | zlog_debug("EXT (%s): Schedule %s%s%s LSA for interface %s", __func__, |
1465 | opcode == REORIGINATE_THIS_LSA ? "Re-Originate" : "", | |
1466 | opcode == REFRESH_THIS_LSA ? "Refresh" : "", | |
1467 | opcode == FLUSH_THIS_LSA ? "Flush" : "", | |
1468 | exti->ifp ? exti->ifp->name : "-"); | |
cf9b9f77 OD |
1469 | |
1470 | /* Set LSA header information */ | |
1471 | if (exti->area == NULL) { | |
ade6974d | 1472 | flog_warn( |
cf444bcf | 1473 | EC_OSPF_EXT_LSA_UNEXPECTED, |
ade6974d QY |
1474 | "EXT (%s): Flooding is Area scope but area is not yet set", |
1475 | __func__); | |
cf9b9f77 OD |
1476 | if (OspfEXT.area == NULL) { |
1477 | top = ospf_lookup_by_vrf_id(VRF_DEFAULT); | |
1478 | OspfEXT.area = ospf_area_lookup_by_area_id( | |
1479 | top, OspfEXT.area_id); | |
1480 | } | |
1481 | exti->area = OspfEXT.area; | |
1482 | } | |
1483 | lsa.area = exti->area; | |
1484 | lsa.data = &lsah; | |
1485 | lsah.type = OSPF_OPAQUE_AREA_LSA; | |
1486 | tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_PREFIX_LSA, exti->instance); | |
1487 | lsah.id.s_addr = htonl(tmp); | |
1488 | ||
1489 | switch (opcode) { | |
1490 | case REORIGINATE_THIS_LSA: | |
1491 | ospf_opaque_lsa_reoriginate_schedule( | |
1492 | (void *)exti->area, OSPF_OPAQUE_AREA_LSA, | |
1493 | OPAQUE_TYPE_EXTENDED_PREFIX_LSA); | |
1494 | break; | |
1495 | case REFRESH_THIS_LSA: | |
1496 | ospf_opaque_lsa_refresh_schedule(&lsa); | |
1497 | break; | |
1498 | case FLUSH_THIS_LSA: | |
1499 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); | |
1500 | ospf_opaque_lsa_flush_schedule(&lsa); | |
1501 | break; | |
cf9b9f77 | 1502 | } |
cf9b9f77 OD |
1503 | } |
1504 | ||
1505 | /* Schedule Extended Link Opaque LSA origination/refreshment/flushing */ | |
1506 | static void ospf_ext_link_lsa_schedule(struct ext_itf *exti, | |
1507 | enum lsa_opcode opcode) | |
1508 | { | |
1509 | struct ospf_lsa lsa; | |
1510 | struct lsa_header lsah; | |
1511 | struct ospf *top; | |
93f0a26e | 1512 | uint32_t tmp; |
cf9b9f77 OD |
1513 | |
1514 | memset(&lsa, 0, sizeof(lsa)); | |
1515 | memset(&lsah, 0, sizeof(lsah)); | |
1516 | ||
1517 | /* Sanity Check */ | |
1518 | if (exti == NULL) | |
1519 | return; | |
1520 | ||
1521 | /* Check if the corresponding link is ready to be flooded */ | |
1522 | if (!(CHECK_FLAG(exti->flags, EXT_LPFLG_LSA_ACTIVE))) | |
1523 | return; | |
1524 | ||
996c9314 LB |
1525 | zlog_debug("EXT (%s): Schedule %s%s%s LSA for interface %s", __func__, |
1526 | opcode == REORIGINATE_THIS_LSA ? "Re-Originate" : "", | |
1527 | opcode == REFRESH_THIS_LSA ? "Refresh" : "", | |
1528 | opcode == FLUSH_THIS_LSA ? "Flush" : "", | |
1529 | exti->ifp ? exti->ifp->name : "-"); | |
cf9b9f77 OD |
1530 | |
1531 | /* Set LSA header information */ | |
1532 | if (exti->area == NULL) { | |
ade6974d | 1533 | flog_warn( |
cf444bcf | 1534 | EC_OSPF_EXT_LSA_UNEXPECTED, |
ade6974d QY |
1535 | "EXT (%s): Flooding is Area scope but area is not yet set", |
1536 | __func__); | |
cf9b9f77 OD |
1537 | if (OspfEXT.area == NULL) { |
1538 | top = ospf_lookup_by_vrf_id(VRF_DEFAULT); | |
1539 | OspfEXT.area = ospf_area_lookup_by_area_id( | |
1540 | top, OspfEXT.area_id); | |
1541 | } | |
1542 | exti->area = OspfEXT.area; | |
1543 | } | |
1544 | lsa.area = exti->area; | |
1545 | lsa.data = &lsah; | |
1546 | lsah.type = OSPF_OPAQUE_AREA_LSA; | |
1547 | tmp = SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_LINK_LSA, exti->instance); | |
1548 | lsah.id.s_addr = htonl(tmp); | |
1549 | ||
1550 | switch (opcode) { | |
1551 | case REORIGINATE_THIS_LSA: | |
1552 | ospf_opaque_lsa_reoriginate_schedule( | |
1553 | (void *)exti->area, OSPF_OPAQUE_AREA_LSA, | |
1554 | OPAQUE_TYPE_EXTENDED_LINK_LSA); | |
1555 | break; | |
1556 | case REFRESH_THIS_LSA: | |
1557 | ospf_opaque_lsa_refresh_schedule(&lsa); | |
1558 | break; | |
1559 | case FLUSH_THIS_LSA: | |
1560 | UNSET_FLAG(exti->flags, EXT_LPFLG_LSA_ENGAGED); | |
1561 | ospf_opaque_lsa_flush_schedule(&lsa); | |
1562 | break; | |
cf9b9f77 | 1563 | } |
cf9b9f77 OD |
1564 | } |
1565 | ||
1566 | /* Schedule Extended Link or Prefix depending of the Type of LSA */ | |
1567 | static void ospf_ext_lsa_schedule(struct ext_itf *exti, enum lsa_opcode op) | |
1568 | { | |
1569 | ||
1570 | if (exti->stype == PREF_SID) | |
1571 | ospf_ext_pref_lsa_schedule(exti, op); | |
1572 | else | |
1573 | ospf_ext_link_lsa_schedule(exti, op); | |
1574 | } | |
1575 | ||
7743f2f8 OD |
1576 | /* |
1577 | * ------------------------------------ | |
cf9b9f77 | 1578 | * Followings are vty show functions. |
7743f2f8 OD |
1579 | * ------------------------------------ |
1580 | */ | |
1581 | ||
cf9b9f77 | 1582 | /* Cisco experimental SubTLV */ |
93f0a26e | 1583 | static uint16_t show_vty_ext_link_rmt_itf_addr(struct vty *vty, |
996c9314 | 1584 | struct tlv_header *tlvh) |
cf9b9f77 OD |
1585 | { |
1586 | struct ext_subtlv_rmt_itf_addr *top; | |
7743f2f8 | 1587 | |
cf9b9f77 OD |
1588 | top = (struct ext_subtlv_rmt_itf_addr *)tlvh; |
1589 | ||
1590 | vty_out(vty, | |
7743f2f8 | 1591 | " Remote Interface Address Sub-TLV: Length %u\n " |
cf9b9f77 OD |
1592 | "Address: %s\n", |
1593 | ntohs(top->header.length), inet_ntoa(top->value)); | |
1594 | ||
1595 | return TLV_SIZE(tlvh); | |
1596 | } | |
1597 | ||
1598 | /* Adjacency SID SubTLV */ | |
93f0a26e | 1599 | static uint16_t show_vty_ext_link_adj_sid(struct vty *vty, |
996c9314 | 1600 | struct tlv_header *tlvh) |
cf9b9f77 OD |
1601 | { |
1602 | struct ext_subtlv_adj_sid *top = (struct ext_subtlv_adj_sid *)tlvh; | |
1603 | ||
1604 | vty_out(vty, | |
7743f2f8 OD |
1605 | " Adj-SID Sub-TLV: Length %u\n\tFlags: " |
1606 | "0x%x\n\tMT-ID:0x%x\n\tWeight: 0x%x\n\t%s: %u\n", | |
cf9b9f77 OD |
1607 | ntohs(top->header.length), top->flags, top->mtid, top->weight, |
1608 | CHECK_FLAG(top->flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG) ? "Label" | |
1609 | : "Index", | |
1610 | CHECK_FLAG(top->flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG) | |
1611 | ? GET_LABEL(ntohl(top->value)) | |
1612 | : ntohl(top->value)); | |
1613 | ||
1614 | return TLV_SIZE(tlvh); | |
1615 | } | |
1616 | ||
1617 | /* LAN Adjacency SubTLV */ | |
93f0a26e | 1618 | static uint16_t show_vty_ext_link_lan_adj_sid(struct vty *vty, |
996c9314 | 1619 | struct tlv_header *tlvh) |
cf9b9f77 OD |
1620 | { |
1621 | struct ext_subtlv_lan_adj_sid *top = | |
1622 | (struct ext_subtlv_lan_adj_sid *)tlvh; | |
1623 | ||
1624 | vty_out(vty, | |
7743f2f8 | 1625 | " LAN-Adj-SID Sub-TLV: Length %u\n\tFlags: " |
cf9b9f77 | 1626 | "0x%x\n\tMT-ID:0x%x\n\tWeight: 0x%x\n\tNeighbor ID: " |
d922605d | 1627 | "%s\n\t%s: %u\n", |
cf9b9f77 | 1628 | ntohs(top->header.length), top->flags, top->mtid, top->weight, |
d922605d | 1629 | inet_ntoa(top->neighbor_id), |
cf9b9f77 OD |
1630 | CHECK_FLAG(top->flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG) ? "Label" |
1631 | : "Index", | |
1632 | CHECK_FLAG(top->flags, EXT_SUBTLV_LINK_ADJ_SID_VFLG) | |
1633 | ? GET_LABEL(ntohl(top->value)) | |
1634 | : ntohl(top->value)); | |
1635 | ||
1636 | return TLV_SIZE(tlvh); | |
1637 | } | |
1638 | ||
93f0a26e | 1639 | static uint16_t show_vty_unknown_tlv(struct vty *vty, struct tlv_header *tlvh) |
cf9b9f77 OD |
1640 | { |
1641 | vty_out(vty, " Unknown TLV: [type(0x%x), length(0x%x)]\n", | |
1642 | ntohs(tlvh->type), ntohs(tlvh->length)); | |
1643 | ||
1644 | return TLV_SIZE(tlvh); | |
1645 | } | |
1646 | ||
1647 | /* Extended Link Sub TLVs */ | |
93f0a26e | 1648 | static uint16_t show_vty_link_info(struct vty *vty, struct tlv_header *ext) |
cf9b9f77 OD |
1649 | { |
1650 | struct ext_tlv_link *top = (struct ext_tlv_link *)ext; | |
1651 | struct tlv_header *tlvh; | |
93f0a26e OD |
1652 | uint16_t length = ntohs(top->header.length) - 3 * sizeof(uint32_t); |
1653 | uint16_t sum = 0; | |
cf9b9f77 OD |
1654 | |
1655 | vty_out(vty, | |
7743f2f8 | 1656 | " Extended Link TLV: Length %u\n Link Type: 0x%x\n" |
cf9b9f77 OD |
1657 | " Link ID: %s\n", |
1658 | ntohs(top->header.length), top->link_type, | |
1659 | inet_ntoa(top->link_id)); | |
1660 | vty_out(vty, " Link data: %s\n", inet_ntoa(top->link_data)); | |
1661 | ||
1662 | tlvh = (struct tlv_header *)((char *)(ext) + TLV_HDR_SIZE | |
1663 | + EXT_TLV_LINK_SIZE); | |
1664 | for (; sum < length; tlvh = TLV_HDR_NEXT(tlvh)) { | |
1665 | switch (ntohs(tlvh->type)) { | |
1666 | case EXT_SUBTLV_ADJ_SID: | |
1667 | sum += show_vty_ext_link_adj_sid(vty, tlvh); | |
1668 | break; | |
1669 | case EXT_SUBTLV_LAN_ADJ_SID: | |
1670 | sum += show_vty_ext_link_lan_adj_sid(vty, tlvh); | |
1671 | break; | |
1672 | case EXT_SUBTLV_RMT_ITF_ADDR: | |
1673 | sum += show_vty_ext_link_rmt_itf_addr(vty, tlvh); | |
1674 | break; | |
1675 | default: | |
1676 | sum += show_vty_unknown_tlv(vty, tlvh); | |
1677 | break; | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | return sum + sizeof(struct ext_tlv_link); | |
1682 | } | |
1683 | ||
1684 | /* Extended Link TLVs */ | |
1685 | static void ospf_ext_link_show_info(struct vty *vty, struct ospf_lsa *lsa) | |
1686 | { | |
1687 | struct lsa_header *lsah = (struct lsa_header *)lsa->data; | |
1688 | struct tlv_header *tlvh; | |
93f0a26e | 1689 | uint16_t length = 0, sum = 0; |
cf9b9f77 OD |
1690 | |
1691 | /* Initialize TLV browsing */ | |
1692 | length = ntohs(lsah->length) - OSPF_LSA_HEADER_SIZE; | |
1693 | ||
1694 | for (tlvh = TLV_HDR_TOP(lsah); sum < length; | |
1695 | tlvh = TLV_HDR_NEXT(tlvh)) { | |
1696 | switch (ntohs(tlvh->type)) { | |
1697 | case EXT_TLV_LINK: | |
1698 | sum += show_vty_link_info(vty, tlvh); | |
1699 | break; | |
1700 | default: | |
1701 | sum += show_vty_unknown_tlv(vty, tlvh); | |
1702 | break; | |
1703 | } | |
1704 | } | |
cf9b9f77 OD |
1705 | } |
1706 | ||
1707 | /* Prefix SID SubTLV */ | |
93f0a26e | 1708 | static uint16_t show_vty_ext_pref_pref_sid(struct vty *vty, |
996c9314 | 1709 | struct tlv_header *tlvh) |
cf9b9f77 OD |
1710 | { |
1711 | struct ext_subtlv_prefix_sid *top = | |
1712 | (struct ext_subtlv_prefix_sid *)tlvh; | |
1713 | ||
1714 | vty_out(vty, | |
7743f2f8 OD |
1715 | " Prefix SID Sub-TLV: Length %u\n\tAlgorithm: " |
1716 | "%u\n\tFlags: 0x%x\n\tMT-ID:0x%x\n\t%s: %u\n", | |
cf9b9f77 OD |
1717 | ntohs(top->header.length), top->algorithm, top->flags, |
1718 | top->mtid, | |
1719 | CHECK_FLAG(top->flags, EXT_SUBTLV_PREFIX_SID_VFLG) ? "Label" | |
1720 | : "Index", | |
1721 | CHECK_FLAG(top->flags, EXT_SUBTLV_PREFIX_SID_VFLG) | |
1722 | ? GET_LABEL(ntohl(top->value)) | |
1723 | : ntohl(top->value)); | |
1724 | ||
1725 | return TLV_SIZE(tlvh); | |
1726 | } | |
1727 | ||
1728 | /* Extended Prefix SubTLVs */ | |
93f0a26e | 1729 | static uint16_t show_vty_pref_info(struct vty *vty, struct tlv_header *ext) |
cf9b9f77 OD |
1730 | { |
1731 | struct ext_tlv_prefix *top = (struct ext_tlv_prefix *)ext; | |
1732 | struct tlv_header *tlvh; | |
93f0a26e OD |
1733 | uint16_t length = ntohs(top->header.length) - 2 * sizeof(uint32_t); |
1734 | uint16_t sum = 0; | |
cf9b9f77 OD |
1735 | |
1736 | vty_out(vty, | |
7743f2f8 OD |
1737 | " Extended Prefix TLV: Length %u\n\tRoute Type: %u\n" |
1738 | "\tAddress Family: 0x%x\n\tFlags: 0x%x\n\tAddress: %s/%u\n", | |
cf9b9f77 OD |
1739 | ntohs(top->header.length), top->route_type, top->af, top->flags, |
1740 | inet_ntoa(top->address), top->pref_length); | |
1741 | ||
1742 | tlvh = (struct tlv_header *)((char *)(ext) + TLV_HDR_SIZE | |
1743 | + EXT_TLV_PREFIX_SIZE); | |
1744 | for (; sum < length; tlvh = TLV_HDR_NEXT(tlvh)) { | |
1745 | switch (ntohs(tlvh->type)) { | |
1746 | case EXT_SUBTLV_PREFIX_SID: | |
1747 | sum += show_vty_ext_pref_pref_sid(vty, tlvh); | |
1748 | break; | |
1749 | default: | |
1750 | sum += show_vty_unknown_tlv(vty, tlvh); | |
1751 | break; | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | return sum + sizeof(struct ext_tlv_prefix); | |
1756 | } | |
1757 | ||
1758 | /* Extended Prefix TLVs */ | |
1759 | static void ospf_ext_pref_show_info(struct vty *vty, struct ospf_lsa *lsa) | |
1760 | { | |
1761 | struct lsa_header *lsah = (struct lsa_header *)lsa->data; | |
1762 | struct tlv_header *tlvh; | |
93f0a26e | 1763 | uint16_t length = 0, sum = 0; |
cf9b9f77 OD |
1764 | |
1765 | /* Initialize TLV browsing */ | |
1766 | length = ntohs(lsah->length) - OSPF_LSA_HEADER_SIZE; | |
1767 | ||
1768 | for (tlvh = TLV_HDR_TOP(lsah); sum < length; | |
1769 | tlvh = TLV_HDR_NEXT(tlvh)) { | |
1770 | switch (ntohs(tlvh->type)) { | |
1771 | case EXT_TLV_PREFIX: | |
1772 | sum += show_vty_pref_info(vty, tlvh); | |
1773 | break; | |
1774 | default: | |
1775 | sum += show_vty_unknown_tlv(vty, tlvh); | |
1776 | break; | |
1777 | } | |
1778 | } | |
cf9b9f77 | 1779 | } |