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2 * IS-IS Rout(e)ing protocol - Multi Topology Support
4 * Copyright (C) 2017 Christian Franke
6 * This file is part of FreeRangeRouting (FRR)
8 * FRR is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2, or (at your option) any
13 * FRR is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; see the file COPYING; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "isisd/isisd.h"
24 #include "isisd/isis_memory.h"
25 #include "isisd/isis_circuit.h"
26 #include "isisd/isis_adjacency.h"
27 #include "isisd/isis_misc.h"
28 #include "isisd/isis_lsp.h"
29 #include "isisd/isis_mt.h"
30 #include "isisd/isis_tlvs.h"
32 DEFINE_MTYPE_STATIC(ISISD
, MT_AREA_SETTING
, "ISIS MT Area Setting")
33 DEFINE_MTYPE_STATIC(ISISD
, MT_CIRCUIT_SETTING
, "ISIS MT Circuit Setting")
34 DEFINE_MTYPE_STATIC(ISISD
, MT_ADJ_INFO
, "ISIS MT Adjacency Info")
36 uint16_t isis_area_ipv6_topology(struct isis_area
*area
)
38 struct isis_area_mt_setting
*area_mt_setting
;
39 area_mt_setting
= area_lookup_mt_setting(area
, ISIS_MT_IPV6_UNICAST
);
41 if (area_mt_setting
&& area_mt_setting
->enabled
)
42 return ISIS_MT_IPV6_UNICAST
;
43 return ISIS_MT_IPV4_UNICAST
;
47 const char *isis_mtid2str(uint16_t mtid
)
49 static char buf
[sizeof("65535")];
52 case ISIS_MT_IPV4_UNICAST
:
53 return "ipv4-unicast";
54 case ISIS_MT_IPV4_MGMT
:
56 case ISIS_MT_IPV6_UNICAST
:
57 return "ipv6-unicast";
58 case ISIS_MT_IPV4_MULTICAST
:
59 return "ipv4-multicast";
60 case ISIS_MT_IPV6_MULTICAST
:
61 return "ipv6-multicast";
62 case ISIS_MT_IPV6_MGMT
:
65 snprintf(buf
, sizeof(buf
), "%" PRIu16
, mtid
);
70 uint16_t isis_str2mtid(const char *name
)
72 if (!strcmp(name
, "ipv4-unicast"))
73 return ISIS_MT_IPV4_UNICAST
;
74 if (!strcmp(name
, "ipv4-mgmt"))
75 return ISIS_MT_IPV4_MGMT
;
76 if (!strcmp(name
, "ipv6-unicast"))
77 return ISIS_MT_IPV6_UNICAST
;
78 if (!strcmp(name
, "ipv4-multicast"))
79 return ISIS_MT_IPV4_MULTICAST
;
80 if (!strcmp(name
, "ipv6-multicast"))
81 return ISIS_MT_IPV6_MULTICAST
;
82 if (!strcmp(name
, "ipv6-mgmt"))
83 return ISIS_MT_IPV6_MGMT
;
87 /* General MT settings api */
93 static void *lookup_mt_setting(struct list
*mt_list
, uint16_t mtid
)
95 struct listnode
*node
;
96 struct mt_setting
*setting
;
98 for (ALL_LIST_ELEMENTS_RO(mt_list
, node
, setting
)) {
99 if (setting
->mtid
== mtid
)
105 static void add_mt_setting(struct list
**mt_list
, void *setting
)
108 *mt_list
= list_new();
109 listnode_add(*mt_list
, setting
);
112 /* Area specific MT settings api */
114 struct isis_area_mt_setting
*area_lookup_mt_setting(struct isis_area
*area
,
117 return lookup_mt_setting(area
->mt_settings
, mtid
);
120 struct isis_area_mt_setting
*area_new_mt_setting(struct isis_area
*area
,
123 struct isis_area_mt_setting
*setting
;
125 setting
= XCALLOC(MTYPE_MT_AREA_SETTING
, sizeof(*setting
));
126 setting
->mtid
= mtid
;
130 static void area_free_mt_setting(void *setting
)
132 XFREE(MTYPE_MT_AREA_SETTING
, setting
);
135 void area_add_mt_setting(struct isis_area
*area
,
136 struct isis_area_mt_setting
*setting
)
138 add_mt_setting(&area
->mt_settings
, setting
);
141 void area_mt_init(struct isis_area
*area
)
143 struct isis_area_mt_setting
*v4_unicast_setting
;
145 /* MTID 0 is always enabled */
146 v4_unicast_setting
= area_new_mt_setting(area
, ISIS_MT_IPV4_UNICAST
);
147 v4_unicast_setting
->enabled
= true;
148 add_mt_setting(&area
->mt_settings
, v4_unicast_setting
);
149 area
->mt_settings
->del
= area_free_mt_setting
;
152 void area_mt_finish(struct isis_area
*area
)
154 list_delete_and_null(&area
->mt_settings
);
157 struct isis_area_mt_setting
*area_get_mt_setting(struct isis_area
*area
,
160 struct isis_area_mt_setting
*setting
;
162 setting
= area_lookup_mt_setting(area
, mtid
);
164 setting
= area_new_mt_setting(area
, mtid
);
165 area_add_mt_setting(area
, setting
);
170 int area_write_mt_settings(struct isis_area
*area
, struct vty
*vty
)
173 struct listnode
*node
;
174 struct isis_area_mt_setting
*setting
;
176 for (ALL_LIST_ELEMENTS_RO(area
->mt_settings
, node
, setting
)) {
177 const char *name
= isis_mtid2str(setting
->mtid
);
178 if (name
&& setting
->enabled
) {
179 if (setting
->mtid
== ISIS_MT_IPV4_UNICAST
)
180 continue; /* always enabled, no need to write
182 vty_out(vty
, " topology %s%s\n", name
,
183 setting
->overload
? " overload" : "");
190 bool area_is_mt(struct isis_area
*area
)
192 struct listnode
*node
, *node2
;
193 struct isis_area_mt_setting
*setting
;
194 struct isis_circuit
*circuit
;
195 struct isis_circuit_mt_setting
*csetting
;
197 for (ALL_LIST_ELEMENTS_RO(area
->mt_settings
, node
, setting
)) {
198 if (setting
->enabled
&& setting
->mtid
!= ISIS_MT_IPV4_UNICAST
)
201 for (ALL_LIST_ELEMENTS_RO(area
->circuit_list
, node
, circuit
)) {
202 for (ALL_LIST_ELEMENTS_RO(circuit
->mt_settings
, node2
,
204 if (!csetting
->enabled
205 && csetting
->mtid
== ISIS_MT_IPV4_UNICAST
)
213 struct isis_area_mt_setting
**area_mt_settings(struct isis_area
*area
,
214 unsigned int *mt_count
)
216 static unsigned int size
= 0;
217 static struct isis_area_mt_setting
**rv
= NULL
;
219 unsigned int count
= 0;
220 struct listnode
*node
;
221 struct isis_area_mt_setting
*setting
;
223 for (ALL_LIST_ELEMENTS_RO(area
->mt_settings
, node
, setting
)) {
224 if (!setting
->enabled
)
229 rv
= XREALLOC(MTYPE_TMP
, rv
, count
* sizeof(*rv
));
232 rv
[count
- 1] = setting
;
239 /* Circuit specific MT settings api */
241 struct isis_circuit_mt_setting
*
242 circuit_lookup_mt_setting(struct isis_circuit
*circuit
, uint16_t mtid
)
244 return lookup_mt_setting(circuit
->mt_settings
, mtid
);
247 struct isis_circuit_mt_setting
*
248 circuit_new_mt_setting(struct isis_circuit
*circuit
, uint16_t mtid
)
250 struct isis_circuit_mt_setting
*setting
;
252 setting
= XCALLOC(MTYPE_MT_CIRCUIT_SETTING
, sizeof(*setting
));
253 setting
->mtid
= mtid
;
254 setting
->enabled
= true; /* Enabled is default for circuit */
258 static void circuit_free_mt_setting(void *setting
)
260 XFREE(MTYPE_MT_CIRCUIT_SETTING
, setting
);
263 void circuit_add_mt_setting(struct isis_circuit
*circuit
,
264 struct isis_circuit_mt_setting
*setting
)
266 add_mt_setting(&circuit
->mt_settings
, setting
);
269 void circuit_mt_init(struct isis_circuit
*circuit
)
271 circuit
->mt_settings
= list_new();
272 circuit
->mt_settings
->del
= circuit_free_mt_setting
;
275 void circuit_mt_finish(struct isis_circuit
*circuit
)
277 list_delete_and_null(&circuit
->mt_settings
);
280 struct isis_circuit_mt_setting
*
281 circuit_get_mt_setting(struct isis_circuit
*circuit
, uint16_t mtid
)
283 struct isis_circuit_mt_setting
*setting
;
285 setting
= circuit_lookup_mt_setting(circuit
, mtid
);
287 setting
= circuit_new_mt_setting(circuit
, mtid
);
288 circuit_add_mt_setting(circuit
, setting
);
293 int circuit_write_mt_settings(struct isis_circuit
*circuit
, struct vty
*vty
)
296 struct listnode
*node
;
297 struct isis_circuit_mt_setting
*setting
;
299 for (ALL_LIST_ELEMENTS_RO(circuit
->mt_settings
, node
, setting
)) {
300 const char *name
= isis_mtid2str(setting
->mtid
);
301 if (name
&& !setting
->enabled
) {
302 vty_out(vty
, " no isis topology %s\n", name
);
309 struct isis_circuit_mt_setting
**
310 circuit_mt_settings(struct isis_circuit
*circuit
, unsigned int *mt_count
)
312 static unsigned int size
= 0;
313 static struct isis_circuit_mt_setting
**rv
= NULL
;
315 struct isis_area_mt_setting
**area_settings
;
316 unsigned int area_count
;
318 unsigned int count
= 0;
320 struct listnode
*node
;
321 struct isis_circuit_mt_setting
*setting
;
323 area_settings
= area_mt_settings(circuit
->area
, &area_count
);
325 for (unsigned int i
= 0; i
< area_count
; i
++) {
326 for (ALL_LIST_ELEMENTS_RO(circuit
->mt_settings
, node
,
328 if (setting
->mtid
!= area_settings
[i
]->mtid
)
333 setting
= circuit_get_mt_setting(
334 circuit
, area_settings
[i
]->mtid
);
336 if (!setting
->enabled
)
341 rv
= XREALLOC(MTYPE_TMP
, rv
, count
* sizeof(*rv
));
344 rv
[count
- 1] = setting
;
351 /* ADJ specific MT API */
352 static void adj_mt_set(struct isis_adjacency
*adj
, unsigned int index
,
355 if (adj
->mt_count
< index
+ 1) {
356 adj
->mt_set
= XREALLOC(MTYPE_MT_ADJ_INFO
, adj
->mt_set
,
357 (index
+ 1) * sizeof(*adj
->mt_set
));
358 adj
->mt_count
= index
+ 1;
360 adj
->mt_set
[index
] = mtid
;
363 bool tlvs_to_adj_mt_set(struct isis_tlvs
*tlvs
, bool v4_usable
, bool v6_usable
,
364 struct isis_adjacency
*adj
)
366 struct isis_circuit_mt_setting
**mt_settings
;
367 unsigned int circuit_mt_count
;
369 unsigned int intersect_count
= 0;
371 uint16_t *old_mt_set
= NULL
;
372 unsigned int old_mt_count
;
374 old_mt_count
= adj
->mt_count
;
377 XCALLOC(MTYPE_TMP
, old_mt_count
* sizeof(*old_mt_set
));
378 memcpy(old_mt_set
, adj
->mt_set
,
379 old_mt_count
* sizeof(*old_mt_set
));
382 mt_settings
= circuit_mt_settings(adj
->circuit
, &circuit_mt_count
);
383 for (unsigned int i
= 0; i
< circuit_mt_count
; i
++) {
384 if (!tlvs
->mt_router_info
.count
385 && !tlvs
->mt_router_info_empty
) {
386 /* Other end does not have MT enabled */
387 if (mt_settings
[i
]->mtid
== ISIS_MT_IPV4_UNICAST
389 adj_mt_set(adj
, intersect_count
++,
390 ISIS_MT_IPV4_UNICAST
);
392 struct isis_mt_router_info
*info_head
;
394 info_head
= (struct isis_mt_router_info
*)
395 tlvs
->mt_router_info
.head
;
396 for (struct isis_mt_router_info
*info
= info_head
; info
;
398 if (mt_settings
[i
]->mtid
== info
->mtid
) {
400 switch (info
->mtid
) {
401 case ISIS_MT_IPV4_UNICAST
:
402 case ISIS_MT_IPV4_MGMT
:
403 case ISIS_MT_IPV4_MULTICAST
:
406 case ISIS_MT_IPV6_UNICAST
:
407 case ISIS_MT_IPV6_MGMT
:
408 case ISIS_MT_IPV6_MULTICAST
:
423 adj
->mt_count
= intersect_count
;
425 bool changed
= false;
427 if (adj
->mt_count
!= old_mt_count
)
430 if (!changed
&& old_mt_count
431 && memcmp(adj
->mt_set
, old_mt_set
,
432 old_mt_count
* sizeof(*old_mt_set
)))
436 XFREE(MTYPE_TMP
, old_mt_set
);
441 bool adj_has_mt(struct isis_adjacency
*adj
, uint16_t mtid
)
443 for (unsigned int i
= 0; i
< adj
->mt_count
; i
++)
444 if (adj
->mt_set
[i
] == mtid
)
449 void adj_mt_finish(struct isis_adjacency
*adj
)
451 XFREE(MTYPE_MT_ADJ_INFO
, adj
->mt_set
);
455 static void mt_set_add(uint16_t **mt_set
, unsigned int *size
,
456 unsigned int *index
, uint16_t mtid
)
458 for (unsigned int i
= 0; i
< *index
; i
++) {
459 if ((*mt_set
)[i
] == mtid
)
463 if (*index
>= *size
) {
464 *mt_set
= XREALLOC(MTYPE_TMP
, *mt_set
,
465 sizeof(**mt_set
) * ((*index
) + 1));
466 *size
= (*index
) + 1;
469 (*mt_set
)[*index
] = mtid
;
470 *index
= (*index
) + 1;
473 static uint16_t *circuit_bcast_mt_set(struct isis_circuit
*circuit
, int level
,
474 unsigned int *mt_count
)
477 static unsigned int size
;
478 struct listnode
*node
;
479 struct isis_adjacency
*adj
;
481 unsigned int count
= 0;
483 if (circuit
->circ_type
!= CIRCUIT_T_BROADCAST
) {
488 for (ALL_LIST_ELEMENTS_RO(circuit
->u
.bc
.adjdb
[level
- 1], node
, adj
)) {
489 if (adj
->adj_state
!= ISIS_ADJ_UP
)
491 for (unsigned int i
= 0; i
< adj
->mt_count
; i
++)
492 mt_set_add(&rv
, &size
, &count
, adj
->mt_set
[i
]);
499 static void tlvs_add_mt_set(struct isis_area
*area
, struct isis_tlvs
*tlvs
,
500 unsigned int mt_count
, uint16_t *mt_set
,
501 uint8_t *id
, uint32_t metric
, uint8_t *subtlvs
,
504 for (unsigned int i
= 0; i
< mt_count
; i
++) {
505 uint16_t mtid
= mt_set
[i
];
506 if (mt_set
[i
] == ISIS_MT_IPV4_UNICAST
) {
508 "ISIS (%s): Adding %s.%02x as te-style neighbor",
509 area
->area_tag
, sysid_print(id
),
513 "ISIS (%s): Adding %s.%02x as mt-style neighbor for %s",
514 area
->area_tag
, sysid_print(id
),
515 LSP_PSEUDO_ID(id
), isis_mtid2str(mtid
));
517 isis_tlvs_add_extended_reach(tlvs
, mtid
, id
, metric
, subtlvs
,
522 void tlvs_add_mt_bcast(struct isis_tlvs
*tlvs
, struct isis_circuit
*circuit
,
523 int level
, uint8_t *id
, uint32_t metric
,
524 uint8_t *subtlvs
, uint8_t subtlv_len
)
526 unsigned int mt_count
;
527 uint16_t *mt_set
= circuit_bcast_mt_set(circuit
, level
, &mt_count
);
529 tlvs_add_mt_set(circuit
->area
, tlvs
, mt_count
, mt_set
, id
, metric
,
530 subtlvs
, subtlv_len
);
533 void tlvs_add_mt_p2p(struct isis_tlvs
*tlvs
, struct isis_circuit
*circuit
,
534 uint8_t *id
, uint32_t metric
, uint8_t *subtlvs
,
537 struct isis_adjacency
*adj
= circuit
->u
.p2p
.neighbor
;
539 tlvs_add_mt_set(circuit
->area
, tlvs
, adj
->mt_count
, adj
->mt_set
, id
,
540 metric
, subtlvs
, subtlv_len
);