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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
5adc2528 AS |
2 | /* |
3 | * Code for encoding/decoding FPM messages that are in netlink format. | |
4 | * | |
5 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
6 | * Copyright (C) 2012 by Open Source Routing. | |
7 | * Copyright (C) 2012 by Internet Systems Consortium, Inc. ("ISC") | |
5adc2528 AS |
8 | */ |
9 | ||
10 | #include <zebra.h> | |
11 | ||
ddfeb486 DL |
12 | #ifdef HAVE_NETLINK |
13 | ||
5adc2528 AS |
14 | #include "log.h" |
15 | #include "rib.h" | |
82f97584 | 16 | #include "vty.h" |
e3be0432 | 17 | #include "prefix.h" |
5adc2528 | 18 | |
1fdc9eae | 19 | #include "zebra/zserv.h" |
b3f2b590 | 20 | #include "zebra/zebra_router.h" |
85a75f1e | 21 | #include "zebra/zebra_dplane.h" |
1fdc9eae | 22 | #include "zebra/zebra_ns.h" |
23 | #include "zebra/zebra_vrf.h" | |
24 | #include "zebra/kernel_netlink.h" | |
25 | #include "zebra/rt_netlink.h" | |
fb018d25 | 26 | #include "nexthop.h" |
5adc2528 | 27 | |
1fdc9eae | 28 | #include "zebra/zebra_fpm_private.h" |
9d21b7c6 | 29 | #include "zebra/zebra_vxlan_private.h" |
1b09e77e | 30 | #include "zebra/interface.h" |
5adc2528 | 31 | |
5adc2528 AS |
32 | /* |
33 | * af_addr_size | |
34 | * | |
35 | * The size of an address in a given address family. | |
36 | */ | |
d7c0a89a | 37 | static size_t af_addr_size(uint8_t af) |
5adc2528 | 38 | { |
d62a17ae | 39 | switch (af) { |
40 | ||
41 | case AF_INET: | |
42 | return 4; | |
d62a17ae | 43 | case AF_INET6: |
44 | return 16; | |
d62a17ae | 45 | default: |
46 | assert(0); | |
47 | return 16; | |
48 | } | |
5adc2528 AS |
49 | } |
50 | ||
9d21b7c6 AD |
51 | /* |
52 | * We plan to use RTA_ENCAP_TYPE attribute for VxLAN encap as well. | |
53 | * Currently, values 0 to 8 for this attribute are used by lwtunnel_encap_types | |
54 | * So, we cannot use these values for VxLAN encap. | |
55 | */ | |
56 | enum fpm_nh_encap_type_t { | |
57 | FPM_NH_ENCAP_NONE = 0, | |
58 | FPM_NH_ENCAP_VXLAN = 100, | |
59 | FPM_NH_ENCAP_MAX, | |
60 | }; | |
61 | ||
62 | /* | |
63 | * fpm_nh_encap_type_to_str | |
64 | */ | |
65 | static const char *fpm_nh_encap_type_to_str(enum fpm_nh_encap_type_t encap_type) | |
66 | { | |
67 | switch (encap_type) { | |
68 | case FPM_NH_ENCAP_NONE: | |
69 | return "none"; | |
70 | ||
71 | case FPM_NH_ENCAP_VXLAN: | |
72 | return "VxLAN"; | |
73 | ||
74 | case FPM_NH_ENCAP_MAX: | |
75 | return "invalid"; | |
76 | } | |
77 | ||
78 | return "invalid"; | |
79 | } | |
80 | ||
81 | struct vxlan_encap_info_t { | |
82 | vni_t vni; | |
83 | }; | |
84 | ||
85 | enum vxlan_encap_info_type_t { | |
86 | VXLAN_VNI = 0, | |
87 | }; | |
88 | ||
89 | struct fpm_nh_encap_info_t { | |
90 | enum fpm_nh_encap_type_t encap_type; | |
91 | union { | |
92 | struct vxlan_encap_info_t vxlan_encap; | |
93 | }; | |
94 | }; | |
95 | ||
5adc2528 | 96 | /* |
7cf19069 | 97 | * netlink_nh_info |
5adc2528 AS |
98 | * |
99 | * Holds information about a single nexthop for netlink. These info | |
100 | * structures are transient and may contain pointers into rib | |
101 | * data structures for convenience. | |
102 | */ | |
7cf19069 | 103 | struct netlink_nh_info { |
eca3256d | 104 | /* Weight of the nexthop ( for unequal cost ECMP ) */ |
105 | uint8_t weight; | |
d62a17ae | 106 | uint32_t if_index; |
107 | union g_addr *gateway; | |
108 | ||
109 | /* | |
110 | * Information from the struct nexthop from which this nh was | |
111 | * derived. For debug purposes only. | |
112 | */ | |
113 | int recursive; | |
114 | enum nexthop_types_t type; | |
9d21b7c6 | 115 | struct fpm_nh_encap_info_t encap_info; |
7cf19069 | 116 | }; |
5adc2528 AS |
117 | |
118 | /* | |
67ceb408 | 119 | * netlink_route_info |
5adc2528 AS |
120 | * |
121 | * A structure for holding information for a netlink route message. | |
122 | */ | |
67ceb408 | 123 | struct netlink_route_info { |
869a5f71 | 124 | uint32_t nlmsg_pid; |
d62a17ae | 125 | uint16_t nlmsg_type; |
d7c0a89a | 126 | uint8_t rtm_type; |
d62a17ae | 127 | uint32_t rtm_table; |
d7c0a89a QY |
128 | uint8_t rtm_protocol; |
129 | uint8_t af; | |
d62a17ae | 130 | struct prefix *prefix; |
131 | uint32_t *metric; | |
132 | unsigned int num_nhs; | |
133 | ||
134 | /* | |
135 | * Nexthop structures | |
136 | */ | |
7cf19069 | 137 | struct netlink_nh_info nhs[MULTIPATH_NUM]; |
d62a17ae | 138 | union g_addr *pref_src; |
67ceb408 | 139 | }; |
5adc2528 AS |
140 | |
141 | /* | |
142 | * netlink_route_info_add_nh | |
143 | * | |
144 | * Add information about the given nexthop to the given route info | |
145 | * structure. | |
146 | * | |
2951a7a4 | 147 | * Returns true if a nexthop was added, false otherwise. |
5adc2528 | 148 | */ |
67ceb408 | 149 | static int netlink_route_info_add_nh(struct netlink_route_info *ri, |
9d21b7c6 AD |
150 | struct nexthop *nexthop, |
151 | struct route_entry *re) | |
5adc2528 | 152 | { |
7cf19069 | 153 | struct netlink_nh_info nhi; |
d62a17ae | 154 | union g_addr *src; |
1b09e77e AD |
155 | struct zebra_vrf *zvrf = NULL; |
156 | struct interface *ifp = NULL, *link_if = NULL; | |
157 | struct zebra_if *zif = NULL; | |
158 | vni_t vni = 0; | |
d62a17ae | 159 | |
160 | memset(&nhi, 0, sizeof(nhi)); | |
161 | src = NULL; | |
162 | ||
7e3a1ec7 | 163 | if (ri->num_nhs >= (int)array_size(ri->nhs)) |
d62a17ae | 164 | return 0; |
165 | ||
166 | nhi.recursive = nexthop->rparent ? 1 : 0; | |
167 | nhi.type = nexthop->type; | |
168 | nhi.if_index = nexthop->ifindex; | |
eca3256d | 169 | nhi.weight = nexthop->weight; |
d62a17ae | 170 | |
171 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
172 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
173 | nhi.gateway = &nexthop->gate; | |
975a328e | 174 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 175 | src = &nexthop->src; |
176 | } | |
177 | ||
178 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
179 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
316d2d52 NK |
180 | /* Special handling for IPv4 route with IPv6 Link Local next hop |
181 | */ | |
182 | if (ri->af == AF_INET) | |
183 | nhi.gateway = &ipv4ll_gateway; | |
184 | else | |
185 | nhi.gateway = &nexthop->gate; | |
d62a17ae | 186 | } |
187 | ||
188 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
975a328e | 189 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 190 | src = &nexthop->src; |
191 | } | |
192 | ||
193 | if (!nhi.gateway && nhi.if_index == 0) | |
194 | return 0; | |
195 | ||
5609e70f | 196 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN)) { |
9d21b7c6 AD |
197 | nhi.encap_info.encap_type = FPM_NH_ENCAP_VXLAN; |
198 | ||
1b09e77e AD |
199 | /* Extract VNI id for the nexthop SVI interface */ |
200 | zvrf = zebra_vrf_lookup_by_id(nexthop->vrf_id); | |
201 | if (zvrf) { | |
202 | ifp = if_lookup_by_index_per_ns(zvrf->zns, | |
203 | nexthop->ifindex); | |
204 | if (ifp) { | |
205 | zif = (struct zebra_if *)ifp->info; | |
206 | if (zif) { | |
207 | if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
208 | link_if = ifp; | |
209 | else if (IS_ZEBRA_IF_VLAN(ifp)) | |
210 | link_if = | |
211 | if_lookup_by_index_per_ns( | |
212 | zvrf->zns, | |
213 | zif->link_ifindex); | |
214 | if (link_if) | |
215 | vni = vni_id_from_svi(ifp, | |
216 | link_if); | |
217 | } | |
218 | } | |
9d21b7c6 | 219 | } |
1b09e77e AD |
220 | |
221 | nhi.encap_info.vxlan_encap.vni = vni; | |
9d21b7c6 AD |
222 | } |
223 | ||
d62a17ae | 224 | /* |
225 | * We have a valid nhi. Copy the structure over to the route_info. | |
226 | */ | |
227 | ri->nhs[ri->num_nhs] = nhi; | |
228 | ri->num_nhs++; | |
229 | ||
230 | if (src && !ri->pref_src) | |
231 | ri->pref_src = src; | |
232 | ||
233 | return 1; | |
5adc2528 AS |
234 | } |
235 | ||
236 | /* | |
237 | * netlink_proto_from_route_type | |
238 | */ | |
d7c0a89a | 239 | static uint8_t netlink_proto_from_route_type(int type) |
5adc2528 | 240 | { |
4a563f27 | 241 | return zebra2proto(type); |
5adc2528 AS |
242 | } |
243 | ||
244 | /* | |
245 | * netlink_route_info_fill | |
246 | * | |
247 | * Fill out the route information object from the given route. | |
248 | * | |
2951a7a4 | 249 | * Returns true on success and false on failure. |
5adc2528 | 250 | */ |
67ceb408 | 251 | static int netlink_route_info_fill(struct netlink_route_info *ri, int cmd, |
d62a17ae | 252 | rib_dest_t *dest, struct route_entry *re) |
5adc2528 | 253 | { |
d62a17ae | 254 | struct nexthop *nexthop; |
d62a17ae | 255 | |
256 | memset(ri, 0, sizeof(*ri)); | |
257 | ||
258 | ri->prefix = rib_dest_prefix(dest); | |
259 | ri->af = rib_dest_af(dest); | |
260 | ||
0eaa6523 | 261 | ri->nlmsg_pid = pid; |
869a5f71 | 262 | |
d62a17ae | 263 | ri->nlmsg_type = cmd; |
d62a17ae | 264 | ri->rtm_protocol = RTPROT_UNSPEC; |
265 | ||
266 | /* | |
267 | * An RTM_DELROUTE need not be accompanied by any nexthops, | |
268 | * particularly in our communication with the FPM. | |
269 | */ | |
270 | if (cmd == RTM_DELROUTE && !re) | |
271 | return 1; | |
272 | ||
273 | if (!re) { | |
5e81f5dd | 274 | zfpm_debug("%s: Expected non-NULL re pointer", __func__); |
d62a17ae | 275 | return 0; |
276 | } | |
277 | ||
0eaa6523 DS |
278 | ri->rtm_table = re->table; |
279 | ||
d62a17ae | 280 | ri->rtm_protocol = netlink_proto_from_route_type(re->type); |
a8309422 | 281 | ri->rtm_type = RTN_UNICAST; |
d62a17ae | 282 | ri->metric = &re->metric; |
283 | ||
c415d895 | 284 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) { |
b3f2b590 | 285 | if (ri->num_nhs >= zrouter.multipath_num) |
d62a17ae | 286 | break; |
287 | ||
288 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
289 | continue; | |
290 | ||
a8309422 DL |
291 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { |
292 | switch (nexthop->bh_type) { | |
293 | case BLACKHOLE_ADMINPROHIB: | |
294 | ri->rtm_type = RTN_PROHIBIT; | |
295 | break; | |
296 | case BLACKHOLE_REJECT: | |
297 | ri->rtm_type = RTN_UNREACHABLE; | |
298 | break; | |
299 | case BLACKHOLE_NULL: | |
a98701f0 | 300 | case BLACKHOLE_UNSPEC: |
a8309422 DL |
301 | ri->rtm_type = RTN_BLACKHOLE; |
302 | break; | |
303 | } | |
a8309422 DL |
304 | } |
305 | ||
d62a17ae | 306 | if ((cmd == RTM_NEWROUTE |
307 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
308 | || (cmd == RTM_DELROUTE | |
677c1dd5 | 309 | && CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED))) { |
9d21b7c6 | 310 | netlink_route_info_add_nh(ri, nexthop, re); |
d62a17ae | 311 | } |
312 | } | |
313 | ||
94f77863 DE |
314 | if (ri->num_nhs == 0) { |
315 | switch (ri->rtm_type) { | |
316 | case RTN_PROHIBIT: | |
317 | case RTN_UNREACHABLE: | |
318 | case RTN_BLACKHOLE: | |
319 | break; | |
320 | default: | |
321 | /* If there is no useful nexthop then return. */ | |
322 | zfpm_debug( | |
323 | "netlink_encode_route(): No useful nexthop."); | |
324 | return 0; | |
325 | } | |
d62a17ae | 326 | } |
327 | ||
328 | return 1; | |
5adc2528 AS |
329 | } |
330 | ||
331 | /* | |
332 | * netlink_route_info_encode | |
333 | * | |
334 | * Returns the number of bytes written to the buffer. 0 or a negative | |
335 | * value indicates an error. | |
336 | */ | |
67ceb408 DS |
337 | static int netlink_route_info_encode(struct netlink_route_info *ri, |
338 | char *in_buf, size_t in_buf_len) | |
5adc2528 | 339 | { |
d62a17ae | 340 | size_t bytelen; |
341 | unsigned int nexthop_num = 0; | |
342 | size_t buf_offset; | |
7cf19069 | 343 | struct netlink_nh_info *nhi; |
9d21b7c6 | 344 | enum fpm_nh_encap_type_t encap; |
312a6bee JU |
345 | struct rtattr *nest, *inner_nest; |
346 | struct rtnexthop *rtnh; | |
9d21b7c6 | 347 | struct vxlan_encap_info_t *vxlan; |
92d6f769 | 348 | struct in6_addr ipv6; |
5adc2528 | 349 | |
d62a17ae | 350 | struct { |
351 | struct nlmsghdr n; | |
352 | struct rtmsg r; | |
353 | char buf[1]; | |
354 | } * req; | |
5adc2528 | 355 | |
d62a17ae | 356 | req = (void *)in_buf; |
5adc2528 | 357 | |
d62a17ae | 358 | buf_offset = ((char *)req->buf) - ((char *)req); |
5adc2528 | 359 | |
d62a17ae | 360 | if (in_buf_len < buf_offset) { |
361 | assert(0); | |
362 | return 0; | |
363 | } | |
5adc2528 | 364 | |
d62a17ae | 365 | memset(req, 0, buf_offset); |
5adc2528 | 366 | |
d62a17ae | 367 | bytelen = af_addr_size(ri->af); |
5adc2528 | 368 | |
d62a17ae | 369 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
370 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
869a5f71 | 371 | req->n.nlmsg_pid = ri->nlmsg_pid; |
d62a17ae | 372 | req->n.nlmsg_type = ri->nlmsg_type; |
373 | req->r.rtm_family = ri->af; | |
6dfcd754 AD |
374 | |
375 | /* | |
f5267398 | 376 | * rtm_table field is a uchar field which can accommodate table_id less |
6dfcd754 AD |
377 | * than 256. |
378 | * To support table id greater than 255, if the table_id is greater than | |
379 | * 255, set rtm_table to RT_TABLE_UNSPEC and add RTA_TABLE attribute | |
380 | * with 32 bit value as the table_id. | |
381 | */ | |
382 | if (ri->rtm_table < 256) | |
383 | req->r.rtm_table = ri->rtm_table; | |
384 | else { | |
385 | req->r.rtm_table = RT_TABLE_UNSPEC; | |
312a6bee | 386 | nl_attr_put32(&req->n, in_buf_len, RTA_TABLE, ri->rtm_table); |
6dfcd754 AD |
387 | } |
388 | ||
d62a17ae | 389 | req->r.rtm_dst_len = ri->prefix->prefixlen; |
390 | req->r.rtm_protocol = ri->rtm_protocol; | |
391 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
5adc2528 | 392 | |
312a6bee JU |
393 | nl_attr_put(&req->n, in_buf_len, RTA_DST, &ri->prefix->u.prefix, |
394 | bytelen); | |
5adc2528 | 395 | |
d62a17ae | 396 | req->r.rtm_type = ri->rtm_type; |
5adc2528 | 397 | |
d62a17ae | 398 | /* Metric. */ |
399 | if (ri->metric) | |
312a6bee | 400 | nl_attr_put32(&req->n, in_buf_len, RTA_PRIORITY, *ri->metric); |
5adc2528 | 401 | |
d62a17ae | 402 | if (ri->num_nhs == 0) |
403 | goto done; | |
5adc2528 | 404 | |
d62a17ae | 405 | if (ri->num_nhs == 1) { |
406 | nhi = &ri->nhs[0]; | |
5adc2528 | 407 | |
d62a17ae | 408 | if (nhi->gateway) { |
92d6f769 K |
409 | if (nhi->type == NEXTHOP_TYPE_IPV4_IFINDEX |
410 | && ri->af == AF_INET6) { | |
411 | ipv4_to_ipv4_mapped_ipv6(&ipv6, | |
412 | nhi->gateway->ipv4); | |
413 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
414 | &ipv6, bytelen); | |
415 | } else | |
416 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
417 | nhi->gateway, bytelen); | |
d62a17ae | 418 | } |
5adc2528 | 419 | |
d62a17ae | 420 | if (nhi->if_index) { |
312a6bee JU |
421 | nl_attr_put32(&req->n, in_buf_len, RTA_OIF, |
422 | nhi->if_index); | |
d62a17ae | 423 | } |
5adc2528 | 424 | |
9d21b7c6 | 425 | encap = nhi->encap_info.encap_type; |
58c3cdb9 DS |
426 | switch (encap) { |
427 | case FPM_NH_ENCAP_NONE: | |
428 | case FPM_NH_ENCAP_MAX: | |
429 | break; | |
430 | case FPM_NH_ENCAP_VXLAN: | |
312a6bee JU |
431 | nl_attr_put16(&req->n, in_buf_len, RTA_ENCAP_TYPE, |
432 | encap); | |
58c3cdb9 | 433 | vxlan = &nhi->encap_info.vxlan_encap; |
312a6bee JU |
434 | nest = nl_attr_nest(&req->n, in_buf_len, RTA_ENCAP); |
435 | nl_attr_put32(&req->n, in_buf_len, VXLAN_VNI, | |
436 | vxlan->vni); | |
437 | nl_attr_nest_end(&req->n, nest); | |
58c3cdb9 | 438 | break; |
9d21b7c6 AD |
439 | } |
440 | ||
d62a17ae | 441 | goto done; |
5adc2528 AS |
442 | } |
443 | ||
d62a17ae | 444 | /* |
445 | * Multipath case. | |
446 | */ | |
312a6bee | 447 | nest = nl_attr_nest(&req->n, in_buf_len, RTA_MULTIPATH); |
d62a17ae | 448 | |
449 | for (nexthop_num = 0; nexthop_num < ri->num_nhs; nexthop_num++) { | |
312a6bee | 450 | rtnh = nl_attr_rtnh(&req->n, in_buf_len); |
d62a17ae | 451 | nhi = &ri->nhs[nexthop_num]; |
452 | ||
312a6bee JU |
453 | if (nhi->gateway) |
454 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
455 | nhi->gateway, bytelen); | |
d62a17ae | 456 | |
457 | if (nhi->if_index) { | |
458 | rtnh->rtnh_ifindex = nhi->if_index; | |
459 | } | |
460 | ||
eca3256d | 461 | rtnh->rtnh_hops = nhi->weight; |
462 | ||
9d21b7c6 | 463 | encap = nhi->encap_info.encap_type; |
58c3cdb9 DS |
464 | switch (encap) { |
465 | case FPM_NH_ENCAP_NONE: | |
466 | case FPM_NH_ENCAP_MAX: | |
467 | break; | |
468 | case FPM_NH_ENCAP_VXLAN: | |
312a6bee JU |
469 | nl_attr_put16(&req->n, in_buf_len, RTA_ENCAP_TYPE, |
470 | encap); | |
58c3cdb9 | 471 | vxlan = &nhi->encap_info.vxlan_encap; |
312a6bee JU |
472 | inner_nest = |
473 | nl_attr_nest(&req->n, in_buf_len, RTA_ENCAP); | |
474 | nl_attr_put32(&req->n, in_buf_len, VXLAN_VNI, | |
475 | vxlan->vni); | |
476 | nl_attr_nest_end(&req->n, inner_nest); | |
58c3cdb9 | 477 | break; |
9d21b7c6 AD |
478 | } |
479 | ||
312a6bee | 480 | nl_attr_rtnh_end(&req->n, rtnh); |
5adc2528 AS |
481 | } |
482 | ||
312a6bee JU |
483 | nl_attr_nest_end(&req->n, nest); |
484 | assert(nest->rta_len > RTA_LENGTH(0)); | |
5adc2528 AS |
485 | |
486 | done: | |
487 | ||
d62a17ae | 488 | if (ri->pref_src) { |
18b7958e | 489 | nl_attr_put(&req->n, in_buf_len, RTA_PREFSRC, ri->pref_src, |
312a6bee | 490 | bytelen); |
d62a17ae | 491 | } |
5adc2528 | 492 | |
d62a17ae | 493 | assert(req->n.nlmsg_len < in_buf_len); |
494 | return req->n.nlmsg_len; | |
5adc2528 AS |
495 | } |
496 | ||
497 | /* | |
498 | * zfpm_log_route_info | |
499 | * | |
500 | * Helper function to log the information in a route_info structure. | |
501 | */ | |
67ceb408 DS |
502 | static void zfpm_log_route_info(struct netlink_route_info *ri, |
503 | const char *label) | |
5adc2528 | 504 | { |
7cf19069 | 505 | struct netlink_nh_info *nhi; |
d62a17ae | 506 | unsigned int i; |
9bcef951 | 507 | char buf[PREFIX_STRLEN]; |
d62a17ae | 508 | |
5e9f9adb DL |
509 | zfpm_debug("%s : %s %pFX, Proto: %s, Metric: %u", label, |
510 | nl_msg_type_to_str(ri->nlmsg_type), ri->prefix, | |
d62a17ae | 511 | nl_rtproto_to_str(ri->rtm_protocol), |
512 | ri->metric ? *ri->metric : 0); | |
513 | ||
514 | for (i = 0; i < ri->num_nhs; i++) { | |
515 | nhi = &ri->nhs[i]; | |
9bcef951 | 516 | |
278749ca | 517 | if (nhi->gateway) { |
518 | if (ri->af == AF_INET) | |
519 | inet_ntop(AF_INET, nhi->gateway, buf, | |
520 | sizeof(buf)); | |
521 | else | |
522 | inet_ntop(AF_INET6, nhi->gateway, buf, | |
523 | sizeof(buf)); | |
524 | } else | |
525 | strlcpy(buf, "none", sizeof(buf)); | |
9bcef951 | 526 | |
9d21b7c6 | 527 | zfpm_debug(" Intf: %u, Gateway: %s, Recursive: %s, Type: %s, Encap type: %s", |
9bcef951 | 528 | nhi->if_index, buf, nhi->recursive ? "yes" : "no", |
9d21b7c6 AD |
529 | nexthop_type_to_str(nhi->type), |
530 | fpm_nh_encap_type_to_str(nhi->encap_info.encap_type) | |
531 | ); | |
d62a17ae | 532 | } |
5adc2528 AS |
533 | } |
534 | ||
535 | /* | |
536 | * zfpm_netlink_encode_route | |
537 | * | |
538 | * Create a netlink message corresponding to the given route in the | |
539 | * given buffer space. | |
540 | * | |
541 | * Returns the number of bytes written to the buffer. 0 or a negative | |
542 | * value indicates an error. | |
543 | */ | |
d62a17ae | 544 | int zfpm_netlink_encode_route(int cmd, rib_dest_t *dest, struct route_entry *re, |
545 | char *in_buf, size_t in_buf_len) | |
5adc2528 | 546 | { |
67ceb408 | 547 | struct netlink_route_info ri_space, *ri; |
5adc2528 | 548 | |
d62a17ae | 549 | ri = &ri_space; |
5adc2528 | 550 | |
d62a17ae | 551 | if (!netlink_route_info_fill(ri, cmd, dest, re)) |
552 | return 0; | |
5adc2528 | 553 | |
15569c58 | 554 | zfpm_log_route_info(ri, __func__); |
5adc2528 | 555 | |
d62a17ae | 556 | return netlink_route_info_encode(ri, in_buf, in_buf_len); |
5adc2528 | 557 | } |
ddfeb486 | 558 | |
9da60d0a AD |
559 | /* |
560 | * zfpm_netlink_encode_mac | |
561 | * | |
562 | * Create a netlink message corresponding to the given MAC. | |
563 | * | |
564 | * Returns the number of bytes written to the buffer. 0 or a negative | |
565 | * value indicates an error. | |
566 | */ | |
567 | int zfpm_netlink_encode_mac(struct fpm_mac_info_t *mac, char *in_buf, | |
568 | size_t in_buf_len) | |
569 | { | |
9da60d0a AD |
570 | size_t buf_offset; |
571 | ||
c5431822 | 572 | struct macmsg { |
9da60d0a AD |
573 | struct nlmsghdr hdr; |
574 | struct ndmsg ndm; | |
575 | char buf[0]; | |
576 | } *req; | |
577 | req = (void *)in_buf; | |
578 | ||
c5431822 | 579 | buf_offset = offsetof(struct macmsg, buf); |
9da60d0a AD |
580 | if (in_buf_len < buf_offset) |
581 | return 0; | |
582 | memset(req, 0, buf_offset); | |
583 | ||
584 | /* Construct nlmsg header */ | |
585 | req->hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
586 | req->hdr.nlmsg_type = CHECK_FLAG(mac->fpm_flags, ZEBRA_MAC_DELETE_FPM) ? | |
587 | RTM_DELNEIGH : RTM_NEWNEIGH; | |
588 | req->hdr.nlmsg_flags = NLM_F_REQUEST; | |
589 | if (req->hdr.nlmsg_type == RTM_NEWNEIGH) | |
590 | req->hdr.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
591 | ||
592 | /* Construct ndmsg */ | |
593 | req->ndm.ndm_family = AF_BRIDGE; | |
594 | req->ndm.ndm_ifindex = mac->vxlan_if; | |
595 | ||
596 | req->ndm.ndm_state = NUD_REACHABLE; | |
597 | req->ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
598 | if (CHECK_FLAG(mac->zebra_flags, | |
599 | (ZEBRA_MAC_STICKY | ZEBRA_MAC_REMOTE_DEF_GW))) | |
600 | req->ndm.ndm_state |= NUD_NOARP; | |
601 | else | |
602 | req->ndm.ndm_flags |= NTF_EXT_LEARNED; | |
603 | ||
604 | /* Add attributes */ | |
312a6bee JU |
605 | nl_attr_put(&req->hdr, in_buf_len, NDA_LLADDR, &mac->macaddr, 6); |
606 | nl_attr_put(&req->hdr, in_buf_len, NDA_DST, &mac->r_vtep_ip, 4); | |
607 | nl_attr_put32(&req->hdr, in_buf_len, NDA_MASTER, mac->svi_if); | |
608 | nl_attr_put32(&req->hdr, in_buf_len, NDA_VNI, mac->vni); | |
9da60d0a AD |
609 | |
610 | assert(req->hdr.nlmsg_len < in_buf_len); | |
611 | ||
5e9f9adb | 612 | zfpm_debug("Tx %s family %s ifindex %u MAC %pEA DEST %pI4", |
9da60d0a AD |
613 | nl_msg_type_to_str(req->hdr.nlmsg_type), |
614 | nl_family_to_str(req->ndm.ndm_family), req->ndm.ndm_ifindex, | |
5e9f9adb | 615 | &mac->macaddr, &mac->r_vtep_ip); |
9da60d0a AD |
616 | |
617 | return req->hdr.nlmsg_len; | |
618 | } | |
619 | ||
ddfeb486 | 620 | #endif /* HAVE_NETLINK */ |