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fb018d25 DS |
1 | /* A generic nexthop structure |
2 | * Copyright (C) 2013 Cumulus Networks, Inc. | |
3 | * | |
a399694f | 4 | * This file is part of Quagga. |
fb018d25 | 5 | * |
a399694f | 6 | * Quagga is free software; you can redistribute it and/or modify it |
fb018d25 DS |
7 | * under the terms of the GNU General Public License as published by the |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
a399694f | 11 | * Quagga is distributed in the hope that it will be useful, but |
fb018d25 DS |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
fb018d25 DS |
19 | */ |
20 | #include <zebra.h> | |
21 | ||
22 | #include "prefix.h" | |
23 | #include "table.h" | |
24 | #include "memory.h" | |
fb018d25 DS |
25 | #include "command.h" |
26 | #include "if.h" | |
27 | #include "log.h" | |
28 | #include "sockunion.h" | |
29 | #include "linklist.h" | |
30 | #include "thread.h" | |
31 | #include "prefix.h" | |
32 | #include "nexthop.h" | |
40c7bdb0 | 33 | #include "mpls.h" |
d36d0d57 | 34 | #include "jhash.h" |
d52ec572 | 35 | #include "printfrr.h" |
f3323df2 | 36 | #include "vrf.h" |
fb018d25 | 37 | |
d62a17ae | 38 | DEFINE_MTYPE_STATIC(LIB, NEXTHOP, "Nexthop") |
39 | DEFINE_MTYPE_STATIC(LIB, NH_LABEL, "Nexthop label") | |
4a1ab8e4 | 40 | |
a5a2d802 SW |
41 | static int _nexthop_labels_cmp(const struct nexthop *nh1, |
42 | const struct nexthop *nh2) | |
ebc403dd SW |
43 | { |
44 | const struct mpls_label_stack *nhl1 = NULL; | |
45 | const struct mpls_label_stack *nhl2 = NULL; | |
46 | ||
47 | nhl1 = nh1->nh_label; | |
48 | nhl2 = nh2->nh_label; | |
49 | ||
50 | /* No labels is a match */ | |
51 | if (!nhl1 && !nhl2) | |
52 | return 0; | |
53 | ||
54 | if (nhl1 && !nhl2) | |
55 | return 1; | |
56 | ||
57 | if (nhl2 && !nhl1) | |
58 | return -1; | |
59 | ||
60 | if (nhl1->num_labels > nhl2->num_labels) | |
61 | return 1; | |
62 | ||
63 | if (nhl1->num_labels < nhl2->num_labels) | |
64 | return -1; | |
65 | ||
66 | return memcmp(nhl1->label, nhl2->label, nhl1->num_labels); | |
67 | } | |
68 | ||
3c6e0bd4 SW |
69 | int nexthop_g_addr_cmp(enum nexthop_types_t type, const union g_addr *addr1, |
70 | const union g_addr *addr2) | |
24cfec84 SW |
71 | { |
72 | int ret = 0; | |
73 | ||
74 | switch (type) { | |
75 | case NEXTHOP_TYPE_IPV4: | |
76 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
77 | ret = IPV4_ADDR_CMP(&addr1->ipv4, &addr2->ipv4); | |
78 | break; | |
79 | case NEXTHOP_TYPE_IPV6: | |
80 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
81 | ret = IPV6_ADDR_CMP(&addr1->ipv6, &addr2->ipv6); | |
82 | break; | |
83 | case NEXTHOP_TYPE_IFINDEX: | |
84 | case NEXTHOP_TYPE_BLACKHOLE: | |
85 | /* No addr here */ | |
86 | break; | |
87 | } | |
88 | ||
89 | return ret; | |
90 | } | |
91 | ||
a5a2d802 SW |
92 | static int _nexthop_gateway_cmp(const struct nexthop *nh1, |
93 | const struct nexthop *nh2) | |
24cfec84 | 94 | { |
3c6e0bd4 | 95 | return nexthop_g_addr_cmp(nh1->type, &nh1->gate, &nh2->gate); |
24cfec84 SW |
96 | } |
97 | ||
a5a2d802 SW |
98 | static int _nexthop_source_cmp(const struct nexthop *nh1, |
99 | const struct nexthop *nh2) | |
24cfec84 | 100 | { |
3c6e0bd4 | 101 | return nexthop_g_addr_cmp(nh1->type, &nh1->src, &nh2->src); |
24cfec84 SW |
102 | } |
103 | ||
a5a2d802 SW |
104 | static int _nexthop_cmp_no_labels(const struct nexthop *next1, |
105 | const struct nexthop *next2) | |
776c3e90 | 106 | { |
ff0e16da | 107 | int ret = 0; |
776c3e90 DS |
108 | |
109 | if (next1->vrf_id < next2->vrf_id) | |
110 | return -1; | |
111 | ||
112 | if (next1->vrf_id > next2->vrf_id) | |
113 | return 1; | |
114 | ||
115 | if (next1->type < next2->type) | |
116 | return -1; | |
117 | ||
118 | if (next1->type > next2->type) | |
119 | return 1; | |
120 | ||
bd054c1a DS |
121 | if (next1->weight < next2->weight) |
122 | return -1; | |
123 | ||
124 | if (next1->weight > next2->weight) | |
125 | return 1; | |
126 | ||
ff0e16da | 127 | switch (next1->type) { |
776c3e90 | 128 | case NEXTHOP_TYPE_IPV4: |
776c3e90 | 129 | case NEXTHOP_TYPE_IPV6: |
a5a2d802 SW |
130 | ret = _nexthop_gateway_cmp(next1, next2); |
131 | if (ret != 0) | |
776c3e90 DS |
132 | return ret; |
133 | break; | |
134 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
135 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
a5a2d802 SW |
136 | ret = _nexthop_gateway_cmp(next1, next2); |
137 | if (ret != 0) | |
776c3e90 DS |
138 | return ret; |
139 | /* Intentional Fall-Through */ | |
140 | case NEXTHOP_TYPE_IFINDEX: | |
141 | if (next1->ifindex < next2->ifindex) | |
142 | return -1; | |
143 | ||
144 | if (next1->ifindex > next2->ifindex) | |
145 | return 1; | |
146 | break; | |
147 | case NEXTHOP_TYPE_BLACKHOLE: | |
148 | if (next1->bh_type < next2->bh_type) | |
149 | return -1; | |
150 | ||
151 | if (next1->bh_type > next2->bh_type) | |
152 | return 1; | |
153 | break; | |
154 | } | |
155 | ||
a5a2d802 SW |
156 | ret = _nexthop_source_cmp(next1, next2); |
157 | ||
158 | return ret; | |
159 | } | |
160 | ||
161 | int nexthop_cmp(const struct nexthop *next1, const struct nexthop *next2) | |
162 | { | |
163 | int ret = 0; | |
164 | ||
165 | ret = _nexthop_cmp_no_labels(next1, next2); | |
166 | if (ret != 0) | |
ff0e16da SW |
167 | return ret; |
168 | ||
a5a2d802 SW |
169 | ret = _nexthop_labels_cmp(next1, next2); |
170 | ||
776c3e90 DS |
171 | return ret; |
172 | } | |
173 | ||
996c9314 | 174 | int nexthop_same_firsthop(struct nexthop *next1, struct nexthop *next2) |
25b9cb0c DL |
175 | { |
176 | int type1 = NEXTHOP_FIRSTHOPTYPE(next1->type); | |
177 | int type2 = NEXTHOP_FIRSTHOPTYPE(next2->type); | |
178 | ||
179 | if (type1 != type2) | |
180 | return 0; | |
996c9314 | 181 | switch (type1) { |
25b9cb0c | 182 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
996c9314 | 183 | if (!IPV4_ADDR_SAME(&next1->gate.ipv4, &next2->gate.ipv4)) |
25b9cb0c DL |
184 | return 0; |
185 | if (next1->ifindex != next2->ifindex) | |
186 | return 0; | |
187 | break; | |
188 | case NEXTHOP_TYPE_IFINDEX: | |
189 | if (next1->ifindex != next2->ifindex) | |
190 | return 0; | |
191 | break; | |
192 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
996c9314 | 193 | if (!IPV6_ADDR_SAME(&next1->gate.ipv6, &next2->gate.ipv6)) |
25b9cb0c DL |
194 | return 0; |
195 | if (next1->ifindex != next2->ifindex) | |
196 | return 0; | |
d62a17ae | 197 | break; |
198 | default: | |
199 | /* do nothing */ | |
200 | break; | |
201 | } | |
202 | return 1; | |
fb018d25 DS |
203 | } |
204 | ||
205 | /* | |
206 | * nexthop_type_to_str | |
207 | */ | |
d62a17ae | 208 | const char *nexthop_type_to_str(enum nexthop_types_t nh_type) |
fb018d25 | 209 | { |
2b64873d | 210 | static const char *const desc[] = { |
d62a17ae | 211 | "none", "Directly connected", |
212 | "IPv4 nexthop", "IPv4 nexthop with ifindex", | |
213 | "IPv6 nexthop", "IPv6 nexthop with ifindex", | |
214 | "Null0 nexthop", | |
215 | }; | |
216 | ||
217 | return desc[nh_type]; | |
fb018d25 | 218 | } |
a399694f | 219 | |
a64448ba DS |
220 | /* |
221 | * Check if the labels match for the 2 nexthops specified. | |
222 | */ | |
89dc3160 | 223 | bool nexthop_labels_match(const struct nexthop *nh1, const struct nexthop *nh2) |
a64448ba | 224 | { |
a5a2d802 | 225 | if (_nexthop_labels_cmp(nh1, nh2) != 0) |
89dc3160 | 226 | return false; |
a64448ba | 227 | |
89dc3160 | 228 | return true; |
a64448ba DS |
229 | } |
230 | ||
d62a17ae | 231 | struct nexthop *nexthop_new(void) |
a399694f | 232 | { |
e28492ae SW |
233 | struct nexthop *nh; |
234 | ||
235 | nh = XCALLOC(MTYPE_NEXTHOP, sizeof(struct nexthop)); | |
236 | ||
237 | /* | |
238 | * Default the weight to 1 here for all nexthops. | |
239 | * The linux kernel does some weird stuff with adding +1 to | |
240 | * all nexthop weights it gets over netlink. | |
241 | * To handle this, just default everything to 1 right from | |
242 | * from the beggining so we don't have to special case | |
243 | * default weights in the linux netlink code. | |
244 | * | |
245 | * 1 should be a valid on all platforms anyway. | |
246 | */ | |
247 | nh->weight = 1; | |
248 | ||
249 | return nh; | |
a399694f DS |
250 | } |
251 | ||
a399694f | 252 | /* Free nexthop. */ |
d62a17ae | 253 | void nexthop_free(struct nexthop *nexthop) |
a399694f | 254 | { |
d62a17ae | 255 | nexthop_del_labels(nexthop); |
256 | if (nexthop->resolved) | |
257 | nexthops_free(nexthop->resolved); | |
258 | XFREE(MTYPE_NEXTHOP, nexthop); | |
a399694f DS |
259 | } |
260 | ||
261 | /* Frees a list of nexthops */ | |
d62a17ae | 262 | void nexthops_free(struct nexthop *nexthop) |
a399694f | 263 | { |
d62a17ae | 264 | struct nexthop *nh, *next; |
a399694f | 265 | |
d62a17ae | 266 | for (nh = nexthop; nh; nh = next) { |
267 | next = nh->next; | |
268 | nexthop_free(nh); | |
269 | } | |
a399694f | 270 | } |
80c2442a | 271 | |
31919191 DS |
272 | bool nexthop_same(const struct nexthop *nh1, const struct nexthop *nh2) |
273 | { | |
274 | if (nh1 && !nh2) | |
275 | return false; | |
276 | ||
277 | if (!nh1 && nh2) | |
278 | return false; | |
279 | ||
280 | if (nh1 == nh2) | |
281 | return true; | |
282 | ||
2ed74b93 | 283 | if (nexthop_cmp(nh1, nh2) != 0) |
31919191 DS |
284 | return false; |
285 | ||
2ed74b93 | 286 | return true; |
31919191 DS |
287 | } |
288 | ||
a5a2d802 SW |
289 | bool nexthop_same_no_labels(const struct nexthop *nh1, |
290 | const struct nexthop *nh2) | |
291 | { | |
292 | if (nh1 && !nh2) | |
293 | return false; | |
294 | ||
295 | if (!nh1 && nh2) | |
296 | return false; | |
297 | ||
298 | if (nh1 == nh2) | |
299 | return true; | |
300 | ||
301 | if (_nexthop_cmp_no_labels(nh1, nh2) != 0) | |
302 | return false; | |
303 | ||
304 | return true; | |
305 | } | |
306 | ||
f3323df2 MS |
307 | /* |
308 | * Allocate a new nexthop object and initialize it from various args. | |
309 | */ | |
310 | struct nexthop *nexthop_from_ifindex(ifindex_t ifindex, vrf_id_t vrf_id) | |
311 | { | |
312 | struct nexthop *nexthop; | |
313 | ||
314 | nexthop = nexthop_new(); | |
315 | nexthop->type = NEXTHOP_TYPE_IFINDEX; | |
316 | nexthop->ifindex = ifindex; | |
317 | nexthop->vrf_id = vrf_id; | |
318 | ||
319 | return nexthop; | |
320 | } | |
321 | ||
322 | struct nexthop *nexthop_from_ipv4(const struct in_addr *ipv4, | |
323 | const struct in_addr *src, | |
324 | vrf_id_t vrf_id) | |
325 | { | |
326 | struct nexthop *nexthop; | |
327 | ||
328 | nexthop = nexthop_new(); | |
329 | nexthop->type = NEXTHOP_TYPE_IPV4; | |
330 | nexthop->vrf_id = vrf_id; | |
331 | nexthop->gate.ipv4 = *ipv4; | |
332 | if (src) | |
333 | nexthop->src.ipv4 = *src; | |
334 | ||
335 | return nexthop; | |
336 | } | |
337 | ||
338 | struct nexthop *nexthop_from_ipv4_ifindex(const struct in_addr *ipv4, | |
339 | const struct in_addr *src, | |
340 | ifindex_t ifindex, vrf_id_t vrf_id) | |
341 | { | |
342 | struct nexthop *nexthop; | |
343 | ||
344 | nexthop = nexthop_new(); | |
345 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
346 | nexthop->vrf_id = vrf_id; | |
347 | nexthop->gate.ipv4 = *ipv4; | |
348 | if (src) | |
349 | nexthop->src.ipv4 = *src; | |
350 | nexthop->ifindex = ifindex; | |
351 | ||
352 | return nexthop; | |
353 | } | |
354 | ||
355 | struct nexthop *nexthop_from_ipv6(const struct in6_addr *ipv6, | |
356 | vrf_id_t vrf_id) | |
357 | { | |
358 | struct nexthop *nexthop; | |
359 | ||
360 | nexthop = nexthop_new(); | |
361 | nexthop->vrf_id = vrf_id; | |
362 | nexthop->type = NEXTHOP_TYPE_IPV6; | |
363 | nexthop->gate.ipv6 = *ipv6; | |
364 | ||
365 | return nexthop; | |
366 | } | |
367 | ||
368 | struct nexthop *nexthop_from_ipv6_ifindex(const struct in6_addr *ipv6, | |
369 | ifindex_t ifindex, vrf_id_t vrf_id) | |
370 | { | |
371 | struct nexthop *nexthop; | |
372 | ||
373 | nexthop = nexthop_new(); | |
374 | nexthop->vrf_id = vrf_id; | |
375 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
376 | nexthop->gate.ipv6 = *ipv6; | |
377 | nexthop->ifindex = ifindex; | |
378 | ||
379 | return nexthop; | |
380 | } | |
381 | ||
382 | struct nexthop *nexthop_from_blackhole(enum blackhole_type bh_type) | |
383 | { | |
384 | struct nexthop *nexthop; | |
385 | ||
386 | nexthop = nexthop_new(); | |
387 | nexthop->vrf_id = VRF_DEFAULT; | |
388 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; | |
389 | nexthop->bh_type = bh_type; | |
390 | ||
391 | return nexthop; | |
392 | } | |
393 | ||
40c7bdb0 | 394 | /* Update nexthop with label information. */ |
d62a17ae | 395 | void nexthop_add_labels(struct nexthop *nexthop, enum lsp_types_t type, |
d7c0a89a | 396 | uint8_t num_labels, mpls_label_t *label) |
40c7bdb0 | 397 | { |
8ecdb26e | 398 | struct mpls_label_stack *nh_label; |
d62a17ae | 399 | int i; |
400 | ||
054af19a MS |
401 | if (num_labels == 0) |
402 | return; | |
403 | ||
d62a17ae | 404 | nexthop->nh_label_type = type; |
405 | nh_label = XCALLOC(MTYPE_NH_LABEL, | |
8ecdb26e | 406 | sizeof(struct mpls_label_stack) |
d62a17ae | 407 | + num_labels * sizeof(mpls_label_t)); |
408 | nh_label->num_labels = num_labels; | |
409 | for (i = 0; i < num_labels; i++) | |
410 | nh_label->label[i] = *(label + i); | |
411 | nexthop->nh_label = nh_label; | |
40c7bdb0 | 412 | } |
413 | ||
414 | /* Free label information of nexthop, if present. */ | |
d62a17ae | 415 | void nexthop_del_labels(struct nexthop *nexthop) |
40c7bdb0 | 416 | { |
d62a17ae | 417 | if (nexthop->nh_label) { |
418 | XFREE(MTYPE_NH_LABEL, nexthop->nh_label); | |
419 | nexthop->nh_label_type = ZEBRA_LSP_NONE; | |
420 | } | |
40c7bdb0 | 421 | } |
422 | ||
d36d0d57 | 423 | const char *nexthop2str(const struct nexthop *nexthop, char *str, int size) |
80c2442a | 424 | { |
d62a17ae | 425 | switch (nexthop->type) { |
426 | case NEXTHOP_TYPE_IFINDEX: | |
427 | snprintf(str, size, "if %u", nexthop->ifindex); | |
428 | break; | |
429 | case NEXTHOP_TYPE_IPV4: | |
d62a17ae | 430 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
431 | snprintf(str, size, "%s if %u", inet_ntoa(nexthop->gate.ipv4), | |
432 | nexthop->ifindex); | |
433 | break; | |
434 | case NEXTHOP_TYPE_IPV6: | |
d62a17ae | 435 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
436 | snprintf(str, size, "%s if %u", inet6_ntoa(nexthop->gate.ipv6), | |
437 | nexthop->ifindex); | |
438 | break; | |
439 | case NEXTHOP_TYPE_BLACKHOLE: | |
440 | snprintf(str, size, "blackhole"); | |
441 | break; | |
442 | default: | |
443 | snprintf(str, size, "unknown"); | |
444 | break; | |
445 | } | |
446 | ||
447 | return str; | |
80c2442a | 448 | } |
9fb47c05 CF |
449 | |
450 | /* | |
451 | * Iteration step for ALL_NEXTHOPS macro: | |
452 | * This is the tricky part. Check if `nexthop' has | |
453 | * NEXTHOP_FLAG_RECURSIVE set. If yes, this implies that `nexthop' has | |
454 | * at least one nexthop attached to `nexthop->resolved', which will be | |
455 | * the next one. | |
456 | * | |
457 | * If NEXTHOP_FLAG_RECURSIVE is not set, `nexthop' will progress in its | |
458 | * current chain. In case its current chain end is reached, it will move | |
459 | * upwards in the recursion levels and progress there. Whenever a step | |
460 | * forward in a chain is done, recursion will be checked again. | |
461 | * In a nustshell, it's equivalent to a pre-traversal order assuming that | |
462 | * left branch is 'resolved' and right branch is 'next': | |
463 | * https://en.wikipedia.org/wiki/Tree_traversal#/media/File:Sorted_binary_tree_preorder.svg | |
464 | */ | |
17c25e03 | 465 | struct nexthop *nexthop_next(const struct nexthop *nexthop) |
9fb47c05 | 466 | { |
d62a17ae | 467 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
468 | return nexthop->resolved; | |
9fb47c05 | 469 | |
d62a17ae | 470 | if (nexthop->next) |
471 | return nexthop->next; | |
9fb47c05 | 472 | |
d62a17ae | 473 | for (struct nexthop *par = nexthop->rparent; par; par = par->rparent) |
474 | if (par->next) | |
475 | return par->next; | |
9fb47c05 | 476 | |
d62a17ae | 477 | return NULL; |
9fb47c05 | 478 | } |
e3054ee9 | 479 | |
986a6617 | 480 | /* Return the next nexthop in the tree that is resolved and active */ |
17c25e03 | 481 | struct nexthop *nexthop_next_active_resolved(const struct nexthop *nexthop) |
986a6617 SW |
482 | { |
483 | struct nexthop *next = nexthop_next(nexthop); | |
484 | ||
485 | while (next | |
486 | && (CHECK_FLAG(next->flags, NEXTHOP_FLAG_RECURSIVE) | |
487 | || !CHECK_FLAG(next->flags, NEXTHOP_FLAG_ACTIVE))) | |
488 | next = nexthop_next(next); | |
489 | ||
490 | return next; | |
491 | } | |
492 | ||
d62a17ae | 493 | unsigned int nexthop_level(struct nexthop *nexthop) |
e3054ee9 | 494 | { |
d62a17ae | 495 | unsigned int rv = 0; |
e3054ee9 | 496 | |
d62a17ae | 497 | for (struct nexthop *par = nexthop->rparent; par; par = par->rparent) |
498 | rv++; | |
e3054ee9 | 499 | |
d62a17ae | 500 | return rv; |
e3054ee9 | 501 | } |
d36d0d57 | 502 | |
73a38187 SW |
503 | /* Only hash word-sized things, let cmp do the rest. */ |
504 | uint32_t nexthop_hash_quick(const struct nexthop *nexthop) | |
d36d0d57 | 505 | { |
1b1fe1c4 | 506 | uint32_t key = 0x45afe398; |
d36d0d57 | 507 | |
1b1fe1c4 SW |
508 | key = jhash_3words(nexthop->type, nexthop->vrf_id, |
509 | nexthop->nh_label_type, key); | |
a15e669c | 510 | |
1b1fe1c4 SW |
511 | if (nexthop->nh_label) { |
512 | int labels = nexthop->nh_label->num_labels; | |
513 | int i = 0; | |
514 | ||
515 | while (labels >= 3) { | |
516 | key = jhash_3words(nexthop->nh_label->label[i], | |
517 | nexthop->nh_label->label[i + 1], | |
518 | nexthop->nh_label->label[i + 2], | |
519 | key); | |
520 | labels -= 3; | |
521 | i += 3; | |
522 | } | |
523 | ||
524 | if (labels >= 2) { | |
525 | key = jhash_2words(nexthop->nh_label->label[i], | |
526 | nexthop->nh_label->label[i + 1], | |
527 | key); | |
528 | labels -= 2; | |
529 | i += 2; | |
530 | } | |
531 | ||
532 | if (labels >= 1) | |
533 | key = jhash_1word(nexthop->nh_label->label[i], key); | |
534 | } | |
535 | ||
cba6a409 SW |
536 | key = jhash_2words(nexthop->ifindex, |
537 | CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK), | |
538 | key); | |
a7df4ccf | 539 | |
d36d0d57 QY |
540 | return key; |
541 | } | |
d52ec572 | 542 | |
73a38187 SW |
543 | |
544 | #define GATE_SIZE 4 /* Number of uint32_t words in struct g_addr */ | |
545 | ||
546 | /* For a more granular hash */ | |
547 | uint32_t nexthop_hash(const struct nexthop *nexthop) | |
548 | { | |
549 | uint32_t gate_src_rmap_raw[GATE_SIZE * 3] = {}; | |
550 | /* Get all the quick stuff */ | |
551 | uint32_t key = nexthop_hash_quick(nexthop); | |
552 | ||
553 | assert(((sizeof(nexthop->gate) + sizeof(nexthop->src) | |
554 | + sizeof(nexthop->rmap_src)) | |
555 | / 3) | |
556 | == (GATE_SIZE * sizeof(uint32_t))); | |
557 | ||
558 | memcpy(gate_src_rmap_raw, &nexthop->gate, GATE_SIZE); | |
559 | memcpy(gate_src_rmap_raw + GATE_SIZE, &nexthop->src, GATE_SIZE); | |
560 | memcpy(gate_src_rmap_raw + (2 * GATE_SIZE), &nexthop->rmap_src, | |
561 | GATE_SIZE); | |
562 | ||
563 | key = jhash2(gate_src_rmap_raw, (GATE_SIZE * 3), key); | |
564 | ||
565 | return key; | |
566 | } | |
567 | ||
e7addf02 SW |
568 | void nexthop_copy(struct nexthop *copy, const struct nexthop *nexthop, |
569 | struct nexthop *rparent) | |
570 | { | |
571 | copy->vrf_id = nexthop->vrf_id; | |
572 | copy->ifindex = nexthop->ifindex; | |
573 | copy->type = nexthop->type; | |
574 | copy->flags = nexthop->flags; | |
df7fb580 | 575 | copy->weight = nexthop->weight; |
e7addf02 SW |
576 | memcpy(©->gate, &nexthop->gate, sizeof(nexthop->gate)); |
577 | memcpy(©->src, &nexthop->src, sizeof(nexthop->src)); | |
578 | memcpy(©->rmap_src, &nexthop->rmap_src, sizeof(nexthop->rmap_src)); | |
579 | copy->rparent = rparent; | |
580 | if (nexthop->nh_label) | |
581 | nexthop_add_labels(copy, nexthop->nh_label_type, | |
582 | nexthop->nh_label->num_labels, | |
583 | &nexthop->nh_label->label[0]); | |
584 | } | |
585 | ||
504d0a40 SW |
586 | struct nexthop *nexthop_dup(const struct nexthop *nexthop, |
587 | struct nexthop *rparent) | |
588 | { | |
589 | struct nexthop *new = nexthop_new(); | |
590 | ||
591 | nexthop_copy(new, nexthop, rparent); | |
592 | return new; | |
593 | } | |
594 | ||
d52ec572 DL |
595 | /* |
596 | * nexthop printing variants: | |
597 | * %pNHvv | |
598 | * via 1.2.3.4 | |
599 | * via 1.2.3.4, eth0 | |
600 | * is directly connected, eth0 | |
601 | * unreachable (blackhole) | |
602 | * %pNHv | |
603 | * 1.2.3.4 | |
604 | * 1.2.3.4, via eth0 | |
605 | * directly connected, eth0 | |
606 | * unreachable (blackhole) | |
607 | * %pNHs | |
608 | * nexthop2str() | |
609 | */ | |
610 | printfrr_ext_autoreg_p("NH", printfrr_nh) | |
611 | static ssize_t printfrr_nh(char *buf, size_t bsz, const char *fmt, | |
612 | int prec, const void *ptr) | |
613 | { | |
614 | const struct nexthop *nexthop = ptr; | |
615 | struct fbuf fb = { .buf = buf, .pos = buf, .len = bsz - 1 }; | |
616 | bool do_ifi = false; | |
617 | const char *s, *v_is = "", *v_via = "", *v_viaif = "via "; | |
618 | ssize_t ret = 3; | |
619 | ||
620 | switch (fmt[2]) { | |
621 | case 'v': | |
622 | if (fmt[3] == 'v') { | |
623 | v_is = "is "; | |
624 | v_via = "via "; | |
625 | v_viaif = ""; | |
626 | ret++; | |
627 | } | |
628 | ||
629 | switch (nexthop->type) { | |
630 | case NEXTHOP_TYPE_IPV4: | |
631 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
632 | bprintfrr(&fb, "%s%pI4", v_via, &nexthop->gate.ipv4); | |
633 | do_ifi = true; | |
634 | break; | |
635 | case NEXTHOP_TYPE_IPV6: | |
636 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
637 | bprintfrr(&fb, "%s%pI6", v_via, &nexthop->gate.ipv6); | |
638 | do_ifi = true; | |
639 | break; | |
640 | case NEXTHOP_TYPE_IFINDEX: | |
641 | bprintfrr(&fb, "%sdirectly connected, %s", v_is, | |
642 | ifindex2ifname(nexthop->ifindex, | |
643 | nexthop->vrf_id)); | |
644 | break; | |
645 | case NEXTHOP_TYPE_BLACKHOLE: | |
646 | switch (nexthop->bh_type) { | |
647 | case BLACKHOLE_REJECT: | |
648 | s = " (ICMP unreachable)"; | |
649 | break; | |
650 | case BLACKHOLE_ADMINPROHIB: | |
651 | s = " (ICMP admin-prohibited)"; | |
652 | break; | |
653 | case BLACKHOLE_NULL: | |
654 | s = " (blackhole)"; | |
655 | break; | |
656 | default: | |
657 | s = ""; | |
658 | break; | |
659 | } | |
660 | bprintfrr(&fb, "unreachable%s", s); | |
661 | break; | |
662 | default: | |
663 | break; | |
664 | } | |
665 | if (do_ifi && nexthop->ifindex) | |
666 | bprintfrr(&fb, ", %s%s", v_viaif, ifindex2ifname( | |
667 | nexthop->ifindex, | |
668 | nexthop->vrf_id)); | |
669 | ||
670 | *fb.pos = '\0'; | |
671 | return ret; | |
672 | case 's': | |
673 | nexthop2str(nexthop, buf, bsz); | |
674 | return 3; | |
675 | } | |
676 | return 0; | |
677 | } |