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Commit | Line | Data |
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5adc2528 AS |
1 | /* |
2 | * Code for encoding/decoding FPM messages that are in netlink format. | |
3 | * | |
4 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
5 | * Copyright (C) 2012 by Open Source Routing. | |
6 | * Copyright (C) 2012 by Internet Systems Consortium, Inc. ("ISC") | |
7 | * | |
8 | * This file is part of GNU Zebra. | |
9 | * | |
10 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2, or (at your option) any | |
13 | * later version. | |
14 | * | |
15 | * GNU Zebra is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
896014f4 DL |
20 | * You should have received a copy of the GNU General Public License along |
21 | * with this program; see the file COPYING; if not, write to the Free Software | |
22 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
5adc2528 AS |
23 | */ |
24 | ||
25 | #include <zebra.h> | |
26 | ||
ddfeb486 DL |
27 | #ifdef HAVE_NETLINK |
28 | ||
5adc2528 AS |
29 | #include "log.h" |
30 | #include "rib.h" | |
82f97584 | 31 | #include "vty.h" |
e3be0432 | 32 | #include "prefix.h" |
5adc2528 | 33 | |
1fdc9eae | 34 | #include "zebra/zserv.h" |
b3f2b590 | 35 | #include "zebra/zebra_router.h" |
85a75f1e | 36 | #include "zebra/zebra_dplane.h" |
1fdc9eae | 37 | #include "zebra/zebra_ns.h" |
38 | #include "zebra/zebra_vrf.h" | |
39 | #include "zebra/kernel_netlink.h" | |
40 | #include "zebra/rt_netlink.h" | |
fb018d25 | 41 | #include "nexthop.h" |
5adc2528 | 42 | |
1fdc9eae | 43 | #include "zebra/zebra_fpm_private.h" |
9d21b7c6 | 44 | #include "zebra/zebra_vxlan_private.h" |
5adc2528 AS |
45 | |
46 | /* | |
47 | * addr_to_a | |
48 | * | |
49 | * Returns string representation of an address of the given AF. | |
50 | */ | |
d7c0a89a | 51 | static inline const char *addr_to_a(uint8_t af, void *addr) |
5adc2528 | 52 | { |
d62a17ae | 53 | if (!addr) |
54 | return "<No address>"; | |
55 | ||
56 | switch (af) { | |
57 | ||
58 | case AF_INET: | |
59 | return inet_ntoa(*((struct in_addr *)addr)); | |
d62a17ae | 60 | case AF_INET6: |
61 | return inet6_ntoa(*((struct in6_addr *)addr)); | |
d62a17ae | 62 | default: |
63 | return "<Addr in unknown AF>"; | |
d62a17ae | 64 | } |
5adc2528 AS |
65 | } |
66 | ||
67 | /* | |
68 | * prefix_addr_to_a | |
69 | * | |
70 | * Convience wrapper that returns a human-readable string for the | |
71 | * address in a prefix. | |
72 | */ | |
d62a17ae | 73 | static const char *prefix_addr_to_a(struct prefix *prefix) |
5adc2528 | 74 | { |
d62a17ae | 75 | if (!prefix) |
76 | return "<No address>"; | |
5adc2528 | 77 | |
d62a17ae | 78 | return addr_to_a(prefix->family, &prefix->u.prefix); |
5adc2528 AS |
79 | } |
80 | ||
81 | /* | |
82 | * af_addr_size | |
83 | * | |
84 | * The size of an address in a given address family. | |
85 | */ | |
d7c0a89a | 86 | static size_t af_addr_size(uint8_t af) |
5adc2528 | 87 | { |
d62a17ae | 88 | switch (af) { |
89 | ||
90 | case AF_INET: | |
91 | return 4; | |
d62a17ae | 92 | case AF_INET6: |
93 | return 16; | |
d62a17ae | 94 | default: |
95 | assert(0); | |
96 | return 16; | |
97 | } | |
5adc2528 AS |
98 | } |
99 | ||
9d21b7c6 AD |
100 | /* |
101 | * We plan to use RTA_ENCAP_TYPE attribute for VxLAN encap as well. | |
102 | * Currently, values 0 to 8 for this attribute are used by lwtunnel_encap_types | |
103 | * So, we cannot use these values for VxLAN encap. | |
104 | */ | |
105 | enum fpm_nh_encap_type_t { | |
106 | FPM_NH_ENCAP_NONE = 0, | |
107 | FPM_NH_ENCAP_VXLAN = 100, | |
108 | FPM_NH_ENCAP_MAX, | |
109 | }; | |
110 | ||
111 | /* | |
112 | * fpm_nh_encap_type_to_str | |
113 | */ | |
114 | static const char *fpm_nh_encap_type_to_str(enum fpm_nh_encap_type_t encap_type) | |
115 | { | |
116 | switch (encap_type) { | |
117 | case FPM_NH_ENCAP_NONE: | |
118 | return "none"; | |
119 | ||
120 | case FPM_NH_ENCAP_VXLAN: | |
121 | return "VxLAN"; | |
122 | ||
123 | case FPM_NH_ENCAP_MAX: | |
124 | return "invalid"; | |
125 | } | |
126 | ||
127 | return "invalid"; | |
128 | } | |
129 | ||
130 | struct vxlan_encap_info_t { | |
131 | vni_t vni; | |
132 | }; | |
133 | ||
134 | enum vxlan_encap_info_type_t { | |
135 | VXLAN_VNI = 0, | |
136 | }; | |
137 | ||
138 | struct fpm_nh_encap_info_t { | |
139 | enum fpm_nh_encap_type_t encap_type; | |
140 | union { | |
141 | struct vxlan_encap_info_t vxlan_encap; | |
142 | }; | |
143 | }; | |
144 | ||
5adc2528 AS |
145 | /* |
146 | * netlink_nh_info_t | |
147 | * | |
148 | * Holds information about a single nexthop for netlink. These info | |
149 | * structures are transient and may contain pointers into rib | |
150 | * data structures for convenience. | |
151 | */ | |
d62a17ae | 152 | typedef struct netlink_nh_info_t_ { |
153 | uint32_t if_index; | |
154 | union g_addr *gateway; | |
155 | ||
156 | /* | |
157 | * Information from the struct nexthop from which this nh was | |
158 | * derived. For debug purposes only. | |
159 | */ | |
160 | int recursive; | |
161 | enum nexthop_types_t type; | |
9d21b7c6 | 162 | struct fpm_nh_encap_info_t encap_info; |
5adc2528 AS |
163 | } netlink_nh_info_t; |
164 | ||
165 | /* | |
166 | * netlink_route_info_t | |
167 | * | |
168 | * A structure for holding information for a netlink route message. | |
169 | */ | |
d62a17ae | 170 | typedef struct netlink_route_info_t_ { |
171 | uint16_t nlmsg_type; | |
d7c0a89a | 172 | uint8_t rtm_type; |
d62a17ae | 173 | uint32_t rtm_table; |
d7c0a89a QY |
174 | uint8_t rtm_protocol; |
175 | uint8_t af; | |
d62a17ae | 176 | struct prefix *prefix; |
177 | uint32_t *metric; | |
178 | unsigned int num_nhs; | |
179 | ||
180 | /* | |
181 | * Nexthop structures | |
182 | */ | |
183 | netlink_nh_info_t nhs[MULTIPATH_NUM]; | |
184 | union g_addr *pref_src; | |
5adc2528 AS |
185 | } netlink_route_info_t; |
186 | ||
187 | /* | |
188 | * netlink_route_info_add_nh | |
189 | * | |
190 | * Add information about the given nexthop to the given route info | |
191 | * structure. | |
192 | * | |
2951a7a4 | 193 | * Returns true if a nexthop was added, false otherwise. |
5adc2528 | 194 | */ |
d62a17ae | 195 | static int netlink_route_info_add_nh(netlink_route_info_t *ri, |
9d21b7c6 AD |
196 | struct nexthop *nexthop, |
197 | struct route_entry *re) | |
5adc2528 | 198 | { |
d62a17ae | 199 | netlink_nh_info_t nhi; |
200 | union g_addr *src; | |
9d21b7c6 | 201 | zebra_l3vni_t *zl3vni = NULL; |
d62a17ae | 202 | |
203 | memset(&nhi, 0, sizeof(nhi)); | |
204 | src = NULL; | |
205 | ||
7e3a1ec7 | 206 | if (ri->num_nhs >= (int)array_size(ri->nhs)) |
d62a17ae | 207 | return 0; |
208 | ||
209 | nhi.recursive = nexthop->rparent ? 1 : 0; | |
210 | nhi.type = nexthop->type; | |
211 | nhi.if_index = nexthop->ifindex; | |
212 | ||
213 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
214 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
215 | nhi.gateway = &nexthop->gate; | |
975a328e | 216 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 217 | src = &nexthop->src; |
218 | } | |
219 | ||
220 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
221 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
222 | nhi.gateway = &nexthop->gate; | |
223 | } | |
224 | ||
225 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
975a328e | 226 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 227 | src = &nexthop->src; |
228 | } | |
229 | ||
230 | if (!nhi.gateway && nhi.if_index == 0) | |
231 | return 0; | |
232 | ||
9d21b7c6 AD |
233 | if (re && CHECK_FLAG(re->flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
234 | nhi.encap_info.encap_type = FPM_NH_ENCAP_VXLAN; | |
235 | ||
cc839074 | 236 | zl3vni = zl3vni_from_vrf(nexthop->vrf_id); |
9d21b7c6 AD |
237 | if (zl3vni && is_l3vni_oper_up(zl3vni)) { |
238 | ||
239 | /* Add VNI to VxLAN encap info */ | |
240 | nhi.encap_info.vxlan_encap.vni = zl3vni->vni; | |
241 | } | |
242 | } | |
243 | ||
d62a17ae | 244 | /* |
245 | * We have a valid nhi. Copy the structure over to the route_info. | |
246 | */ | |
247 | ri->nhs[ri->num_nhs] = nhi; | |
248 | ri->num_nhs++; | |
249 | ||
250 | if (src && !ri->pref_src) | |
251 | ri->pref_src = src; | |
252 | ||
253 | return 1; | |
5adc2528 AS |
254 | } |
255 | ||
256 | /* | |
257 | * netlink_proto_from_route_type | |
258 | */ | |
d7c0a89a | 259 | static uint8_t netlink_proto_from_route_type(int type) |
5adc2528 | 260 | { |
d62a17ae | 261 | switch (type) { |
262 | case ZEBRA_ROUTE_KERNEL: | |
263 | case ZEBRA_ROUTE_CONNECT: | |
264 | return RTPROT_KERNEL; | |
265 | ||
266 | default: | |
267 | return RTPROT_ZEBRA; | |
268 | } | |
5adc2528 AS |
269 | } |
270 | ||
271 | /* | |
272 | * netlink_route_info_fill | |
273 | * | |
274 | * Fill out the route information object from the given route. | |
275 | * | |
2951a7a4 | 276 | * Returns true on success and false on failure. |
5adc2528 | 277 | */ |
d62a17ae | 278 | static int netlink_route_info_fill(netlink_route_info_t *ri, int cmd, |
279 | rib_dest_t *dest, struct route_entry *re) | |
5adc2528 | 280 | { |
d62a17ae | 281 | struct nexthop *nexthop; |
6dfcd754 | 282 | struct zebra_vrf *zvrf; |
d62a17ae | 283 | |
284 | memset(ri, 0, sizeof(*ri)); | |
285 | ||
286 | ri->prefix = rib_dest_prefix(dest); | |
287 | ri->af = rib_dest_af(dest); | |
288 | ||
289 | ri->nlmsg_type = cmd; | |
6dfcd754 AD |
290 | zvrf = rib_dest_vrf(dest); |
291 | if (zvrf) | |
292 | ri->rtm_table = zvrf->table_id; | |
d62a17ae | 293 | ri->rtm_protocol = RTPROT_UNSPEC; |
294 | ||
295 | /* | |
296 | * An RTM_DELROUTE need not be accompanied by any nexthops, | |
297 | * particularly in our communication with the FPM. | |
298 | */ | |
299 | if (cmd == RTM_DELROUTE && !re) | |
300 | return 1; | |
301 | ||
302 | if (!re) { | |
5e81f5dd | 303 | zfpm_debug("%s: Expected non-NULL re pointer", __func__); |
d62a17ae | 304 | return 0; |
305 | } | |
306 | ||
307 | ri->rtm_protocol = netlink_proto_from_route_type(re->type); | |
a8309422 | 308 | ri->rtm_type = RTN_UNICAST; |
d62a17ae | 309 | ri->metric = &re->metric; |
310 | ||
c415d895 | 311 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) { |
b3f2b590 | 312 | if (ri->num_nhs >= zrouter.multipath_num) |
d62a17ae | 313 | break; |
314 | ||
315 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
316 | continue; | |
317 | ||
a8309422 DL |
318 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { |
319 | switch (nexthop->bh_type) { | |
320 | case BLACKHOLE_ADMINPROHIB: | |
321 | ri->rtm_type = RTN_PROHIBIT; | |
322 | break; | |
323 | case BLACKHOLE_REJECT: | |
324 | ri->rtm_type = RTN_UNREACHABLE; | |
325 | break; | |
326 | case BLACKHOLE_NULL: | |
327 | default: | |
328 | ri->rtm_type = RTN_BLACKHOLE; | |
329 | break; | |
330 | } | |
a8309422 DL |
331 | } |
332 | ||
d62a17ae | 333 | if ((cmd == RTM_NEWROUTE |
334 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
335 | || (cmd == RTM_DELROUTE | |
677c1dd5 | 336 | && CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED))) { |
9d21b7c6 | 337 | netlink_route_info_add_nh(ri, nexthop, re); |
d62a17ae | 338 | } |
339 | } | |
340 | ||
341 | /* If there is no useful nexthop then return. */ | |
342 | if (ri->num_nhs == 0) { | |
343 | zfpm_debug("netlink_encode_route(): No useful nexthop."); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | return 1; | |
5adc2528 AS |
348 | } |
349 | ||
350 | /* | |
351 | * netlink_route_info_encode | |
352 | * | |
353 | * Returns the number of bytes written to the buffer. 0 or a negative | |
354 | * value indicates an error. | |
355 | */ | |
d62a17ae | 356 | static int netlink_route_info_encode(netlink_route_info_t *ri, char *in_buf, |
357 | size_t in_buf_len) | |
5adc2528 | 358 | { |
d62a17ae | 359 | size_t bytelen; |
360 | unsigned int nexthop_num = 0; | |
361 | size_t buf_offset; | |
362 | netlink_nh_info_t *nhi; | |
9d21b7c6 AD |
363 | enum fpm_nh_encap_type_t encap; |
364 | struct rtattr *nest; | |
365 | struct vxlan_encap_info_t *vxlan; | |
366 | int nest_len; | |
5adc2528 | 367 | |
d62a17ae | 368 | struct { |
369 | struct nlmsghdr n; | |
370 | struct rtmsg r; | |
371 | char buf[1]; | |
372 | } * req; | |
5adc2528 | 373 | |
d62a17ae | 374 | req = (void *)in_buf; |
5adc2528 | 375 | |
d62a17ae | 376 | buf_offset = ((char *)req->buf) - ((char *)req); |
5adc2528 | 377 | |
d62a17ae | 378 | if (in_buf_len < buf_offset) { |
379 | assert(0); | |
380 | return 0; | |
381 | } | |
5adc2528 | 382 | |
d62a17ae | 383 | memset(req, 0, buf_offset); |
5adc2528 | 384 | |
d62a17ae | 385 | bytelen = af_addr_size(ri->af); |
5adc2528 | 386 | |
d62a17ae | 387 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
388 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
389 | req->n.nlmsg_type = ri->nlmsg_type; | |
390 | req->r.rtm_family = ri->af; | |
6dfcd754 AD |
391 | |
392 | /* | |
393 | * rtm_table field is a uchar field which can accomodate table_id less | |
394 | * than 256. | |
395 | * To support table id greater than 255, if the table_id is greater than | |
396 | * 255, set rtm_table to RT_TABLE_UNSPEC and add RTA_TABLE attribute | |
397 | * with 32 bit value as the table_id. | |
398 | */ | |
399 | if (ri->rtm_table < 256) | |
400 | req->r.rtm_table = ri->rtm_table; | |
401 | else { | |
402 | req->r.rtm_table = RT_TABLE_UNSPEC; | |
403 | addattr32(&req->n, in_buf_len, RTA_TABLE, ri->rtm_table); | |
404 | } | |
405 | ||
d62a17ae | 406 | req->r.rtm_dst_len = ri->prefix->prefixlen; |
407 | req->r.rtm_protocol = ri->rtm_protocol; | |
408 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
5adc2528 | 409 | |
d62a17ae | 410 | addattr_l(&req->n, in_buf_len, RTA_DST, &ri->prefix->u.prefix, bytelen); |
5adc2528 | 411 | |
d62a17ae | 412 | req->r.rtm_type = ri->rtm_type; |
5adc2528 | 413 | |
d62a17ae | 414 | /* Metric. */ |
415 | if (ri->metric) | |
416 | addattr32(&req->n, in_buf_len, RTA_PRIORITY, *ri->metric); | |
5adc2528 | 417 | |
d62a17ae | 418 | if (ri->num_nhs == 0) |
419 | goto done; | |
5adc2528 | 420 | |
d62a17ae | 421 | if (ri->num_nhs == 1) { |
422 | nhi = &ri->nhs[0]; | |
5adc2528 | 423 | |
d62a17ae | 424 | if (nhi->gateway) { |
425 | addattr_l(&req->n, in_buf_len, RTA_GATEWAY, | |
426 | nhi->gateway, bytelen); | |
427 | } | |
5adc2528 | 428 | |
d62a17ae | 429 | if (nhi->if_index) { |
430 | addattr32(&req->n, in_buf_len, RTA_OIF, nhi->if_index); | |
431 | } | |
5adc2528 | 432 | |
9d21b7c6 AD |
433 | encap = nhi->encap_info.encap_type; |
434 | if (encap > FPM_NH_ENCAP_NONE) { | |
435 | addattr_l(&req->n, in_buf_len, RTA_ENCAP_TYPE, &encap, | |
436 | sizeof(uint16_t)); | |
437 | switch (encap) { | |
438 | case FPM_NH_ENCAP_NONE: | |
439 | break; | |
440 | case FPM_NH_ENCAP_VXLAN: | |
441 | vxlan = &nhi->encap_info.vxlan_encap; | |
442 | nest = addattr_nest(&req->n, in_buf_len, | |
443 | RTA_ENCAP); | |
444 | addattr32(&req->n, in_buf_len, VXLAN_VNI, | |
445 | vxlan->vni); | |
446 | addattr_nest_end(&req->n, nest); | |
447 | break; | |
448 | case FPM_NH_ENCAP_MAX: | |
449 | break; | |
450 | } | |
451 | } | |
452 | ||
d62a17ae | 453 | goto done; |
5adc2528 AS |
454 | } |
455 | ||
d62a17ae | 456 | /* |
457 | * Multipath case. | |
458 | */ | |
459 | char buf[NL_PKT_BUF_SIZE]; | |
460 | struct rtattr *rta = (void *)buf; | |
461 | struct rtnexthop *rtnh; | |
462 | ||
463 | rta->rta_type = RTA_MULTIPATH; | |
464 | rta->rta_len = RTA_LENGTH(0); | |
465 | rtnh = RTA_DATA(rta); | |
466 | ||
467 | for (nexthop_num = 0; nexthop_num < ri->num_nhs; nexthop_num++) { | |
468 | nhi = &ri->nhs[nexthop_num]; | |
469 | ||
470 | rtnh->rtnh_len = sizeof(*rtnh); | |
471 | rtnh->rtnh_flags = 0; | |
472 | rtnh->rtnh_hops = 0; | |
473 | rtnh->rtnh_ifindex = 0; | |
474 | rta->rta_len += rtnh->rtnh_len; | |
475 | ||
476 | if (nhi->gateway) { | |
477 | rta_addattr_l(rta, sizeof(buf), RTA_GATEWAY, | |
478 | nhi->gateway, bytelen); | |
479 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
480 | } | |
481 | ||
482 | if (nhi->if_index) { | |
483 | rtnh->rtnh_ifindex = nhi->if_index; | |
484 | } | |
485 | ||
9d21b7c6 AD |
486 | encap = nhi->encap_info.encap_type; |
487 | if (encap > FPM_NH_ENCAP_NONE) { | |
488 | rta_addattr_l(rta, sizeof(buf), RTA_ENCAP_TYPE, | |
489 | &encap, sizeof(uint16_t)); | |
490 | rtnh->rtnh_len += sizeof(struct rtattr) + | |
491 | sizeof(uint16_t); | |
492 | switch (encap) { | |
493 | case FPM_NH_ENCAP_NONE: | |
494 | break; | |
495 | case FPM_NH_ENCAP_VXLAN: | |
496 | vxlan = &nhi->encap_info.vxlan_encap; | |
497 | nest = rta_nest(rta, sizeof(buf), RTA_ENCAP); | |
498 | rta_addattr_l(rta, sizeof(buf), VXLAN_VNI, | |
499 | &vxlan->vni, sizeof(uint32_t)); | |
500 | nest_len = rta_nest_end(rta, nest); | |
501 | rtnh->rtnh_len += nest_len; | |
502 | break; | |
503 | case FPM_NH_ENCAP_MAX: | |
504 | break; | |
505 | } | |
506 | } | |
507 | ||
d62a17ae | 508 | rtnh = RTNH_NEXT(rtnh); |
5adc2528 AS |
509 | } |
510 | ||
d62a17ae | 511 | assert(rta->rta_len > RTA_LENGTH(0)); |
512 | addattr_l(&req->n, in_buf_len, RTA_MULTIPATH, RTA_DATA(rta), | |
513 | RTA_PAYLOAD(rta)); | |
5adc2528 AS |
514 | |
515 | done: | |
516 | ||
d62a17ae | 517 | if (ri->pref_src) { |
518 | addattr_l(&req->n, in_buf_len, RTA_PREFSRC, &ri->pref_src, | |
519 | bytelen); | |
520 | } | |
5adc2528 | 521 | |
d62a17ae | 522 | assert(req->n.nlmsg_len < in_buf_len); |
523 | return req->n.nlmsg_len; | |
5adc2528 AS |
524 | } |
525 | ||
526 | /* | |
527 | * zfpm_log_route_info | |
528 | * | |
529 | * Helper function to log the information in a route_info structure. | |
530 | */ | |
d62a17ae | 531 | static void zfpm_log_route_info(netlink_route_info_t *ri, const char *label) |
5adc2528 | 532 | { |
d62a17ae | 533 | netlink_nh_info_t *nhi; |
534 | unsigned int i; | |
535 | ||
536 | zfpm_debug("%s : %s %s/%d, Proto: %s, Metric: %u", label, | |
537 | nl_msg_type_to_str(ri->nlmsg_type), | |
538 | prefix_addr_to_a(ri->prefix), ri->prefix->prefixlen, | |
539 | nl_rtproto_to_str(ri->rtm_protocol), | |
540 | ri->metric ? *ri->metric : 0); | |
541 | ||
542 | for (i = 0; i < ri->num_nhs; i++) { | |
543 | nhi = &ri->nhs[i]; | |
9d21b7c6 | 544 | zfpm_debug(" Intf: %u, Gateway: %s, Recursive: %s, Type: %s, Encap type: %s", |
d62a17ae | 545 | nhi->if_index, addr_to_a(ri->af, nhi->gateway), |
546 | nhi->recursive ? "yes" : "no", | |
9d21b7c6 AD |
547 | nexthop_type_to_str(nhi->type), |
548 | fpm_nh_encap_type_to_str(nhi->encap_info.encap_type) | |
549 | ); | |
d62a17ae | 550 | } |
5adc2528 AS |
551 | } |
552 | ||
553 | /* | |
554 | * zfpm_netlink_encode_route | |
555 | * | |
556 | * Create a netlink message corresponding to the given route in the | |
557 | * given buffer space. | |
558 | * | |
559 | * Returns the number of bytes written to the buffer. 0 or a negative | |
560 | * value indicates an error. | |
561 | */ | |
d62a17ae | 562 | int zfpm_netlink_encode_route(int cmd, rib_dest_t *dest, struct route_entry *re, |
563 | char *in_buf, size_t in_buf_len) | |
5adc2528 | 564 | { |
d62a17ae | 565 | netlink_route_info_t ri_space, *ri; |
5adc2528 | 566 | |
d62a17ae | 567 | ri = &ri_space; |
5adc2528 | 568 | |
d62a17ae | 569 | if (!netlink_route_info_fill(ri, cmd, dest, re)) |
570 | return 0; | |
5adc2528 | 571 | |
15569c58 | 572 | zfpm_log_route_info(ri, __func__); |
5adc2528 | 573 | |
d62a17ae | 574 | return netlink_route_info_encode(ri, in_buf, in_buf_len); |
5adc2528 | 575 | } |
ddfeb486 | 576 | |
9da60d0a AD |
577 | /* |
578 | * zfpm_netlink_encode_mac | |
579 | * | |
580 | * Create a netlink message corresponding to the given MAC. | |
581 | * | |
582 | * Returns the number of bytes written to the buffer. 0 or a negative | |
583 | * value indicates an error. | |
584 | */ | |
585 | int zfpm_netlink_encode_mac(struct fpm_mac_info_t *mac, char *in_buf, | |
586 | size_t in_buf_len) | |
587 | { | |
588 | char buf1[ETHER_ADDR_STRLEN]; | |
589 | size_t buf_offset; | |
590 | ||
c5431822 | 591 | struct macmsg { |
9da60d0a AD |
592 | struct nlmsghdr hdr; |
593 | struct ndmsg ndm; | |
594 | char buf[0]; | |
595 | } *req; | |
596 | req = (void *)in_buf; | |
597 | ||
c5431822 | 598 | buf_offset = offsetof(struct macmsg, buf); |
9da60d0a AD |
599 | if (in_buf_len < buf_offset) |
600 | return 0; | |
601 | memset(req, 0, buf_offset); | |
602 | ||
603 | /* Construct nlmsg header */ | |
604 | req->hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
605 | req->hdr.nlmsg_type = CHECK_FLAG(mac->fpm_flags, ZEBRA_MAC_DELETE_FPM) ? | |
606 | RTM_DELNEIGH : RTM_NEWNEIGH; | |
607 | req->hdr.nlmsg_flags = NLM_F_REQUEST; | |
608 | if (req->hdr.nlmsg_type == RTM_NEWNEIGH) | |
609 | req->hdr.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
610 | ||
611 | /* Construct ndmsg */ | |
612 | req->ndm.ndm_family = AF_BRIDGE; | |
613 | req->ndm.ndm_ifindex = mac->vxlan_if; | |
614 | ||
615 | req->ndm.ndm_state = NUD_REACHABLE; | |
616 | req->ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
617 | if (CHECK_FLAG(mac->zebra_flags, | |
618 | (ZEBRA_MAC_STICKY | ZEBRA_MAC_REMOTE_DEF_GW))) | |
619 | req->ndm.ndm_state |= NUD_NOARP; | |
620 | else | |
621 | req->ndm.ndm_flags |= NTF_EXT_LEARNED; | |
622 | ||
623 | /* Add attributes */ | |
624 | addattr_l(&req->hdr, in_buf_len, NDA_LLADDR, &mac->macaddr, 6); | |
625 | addattr_l(&req->hdr, in_buf_len, NDA_DST, &mac->r_vtep_ip, 4); | |
626 | addattr32(&req->hdr, in_buf_len, NDA_MASTER, mac->svi_if); | |
627 | addattr32(&req->hdr, in_buf_len, NDA_VNI, mac->vni); | |
628 | ||
629 | assert(req->hdr.nlmsg_len < in_buf_len); | |
630 | ||
631 | zfpm_debug("Tx %s family %s ifindex %u MAC %s DEST %s", | |
632 | nl_msg_type_to_str(req->hdr.nlmsg_type), | |
633 | nl_family_to_str(req->ndm.ndm_family), req->ndm.ndm_ifindex, | |
634 | prefix_mac2str(&mac->macaddr, buf1, sizeof(buf1)), | |
635 | inet_ntoa(mac->r_vtep_ip)); | |
636 | ||
637 | return req->hdr.nlmsg_len; | |
638 | } | |
639 | ||
ddfeb486 | 640 | #endif /* HAVE_NETLINK */ |