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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" |
1b09e77e | 45 | #include "zebra/interface.h" |
5adc2528 | 46 | |
5adc2528 AS |
47 | /* |
48 | * af_addr_size | |
49 | * | |
50 | * The size of an address in a given address family. | |
51 | */ | |
d7c0a89a | 52 | static size_t af_addr_size(uint8_t af) |
5adc2528 | 53 | { |
d62a17ae | 54 | switch (af) { |
55 | ||
56 | case AF_INET: | |
57 | return 4; | |
d62a17ae | 58 | case AF_INET6: |
59 | return 16; | |
d62a17ae | 60 | default: |
61 | assert(0); | |
62 | return 16; | |
63 | } | |
5adc2528 AS |
64 | } |
65 | ||
9d21b7c6 AD |
66 | /* |
67 | * We plan to use RTA_ENCAP_TYPE attribute for VxLAN encap as well. | |
68 | * Currently, values 0 to 8 for this attribute are used by lwtunnel_encap_types | |
69 | * So, we cannot use these values for VxLAN encap. | |
70 | */ | |
71 | enum fpm_nh_encap_type_t { | |
72 | FPM_NH_ENCAP_NONE = 0, | |
73 | FPM_NH_ENCAP_VXLAN = 100, | |
74 | FPM_NH_ENCAP_MAX, | |
75 | }; | |
76 | ||
77 | /* | |
78 | * fpm_nh_encap_type_to_str | |
79 | */ | |
80 | static const char *fpm_nh_encap_type_to_str(enum fpm_nh_encap_type_t encap_type) | |
81 | { | |
82 | switch (encap_type) { | |
83 | case FPM_NH_ENCAP_NONE: | |
84 | return "none"; | |
85 | ||
86 | case FPM_NH_ENCAP_VXLAN: | |
87 | return "VxLAN"; | |
88 | ||
89 | case FPM_NH_ENCAP_MAX: | |
90 | return "invalid"; | |
91 | } | |
92 | ||
93 | return "invalid"; | |
94 | } | |
95 | ||
96 | struct vxlan_encap_info_t { | |
97 | vni_t vni; | |
98 | }; | |
99 | ||
100 | enum vxlan_encap_info_type_t { | |
101 | VXLAN_VNI = 0, | |
102 | }; | |
103 | ||
104 | struct fpm_nh_encap_info_t { | |
105 | enum fpm_nh_encap_type_t encap_type; | |
106 | union { | |
107 | struct vxlan_encap_info_t vxlan_encap; | |
108 | }; | |
109 | }; | |
110 | ||
5adc2528 | 111 | /* |
7cf19069 | 112 | * netlink_nh_info |
5adc2528 AS |
113 | * |
114 | * Holds information about a single nexthop for netlink. These info | |
115 | * structures are transient and may contain pointers into rib | |
116 | * data structures for convenience. | |
117 | */ | |
7cf19069 | 118 | struct netlink_nh_info { |
eca3256d | 119 | /* Weight of the nexthop ( for unequal cost ECMP ) */ |
120 | uint8_t weight; | |
d62a17ae | 121 | uint32_t if_index; |
122 | union g_addr *gateway; | |
123 | ||
124 | /* | |
125 | * Information from the struct nexthop from which this nh was | |
126 | * derived. For debug purposes only. | |
127 | */ | |
128 | int recursive; | |
129 | enum nexthop_types_t type; | |
9d21b7c6 | 130 | struct fpm_nh_encap_info_t encap_info; |
7cf19069 | 131 | }; |
5adc2528 AS |
132 | |
133 | /* | |
67ceb408 | 134 | * netlink_route_info |
5adc2528 AS |
135 | * |
136 | * A structure for holding information for a netlink route message. | |
137 | */ | |
67ceb408 | 138 | struct netlink_route_info { |
869a5f71 | 139 | uint32_t nlmsg_pid; |
d62a17ae | 140 | uint16_t nlmsg_type; |
d7c0a89a | 141 | uint8_t rtm_type; |
d62a17ae | 142 | uint32_t rtm_table; |
d7c0a89a QY |
143 | uint8_t rtm_protocol; |
144 | uint8_t af; | |
d62a17ae | 145 | struct prefix *prefix; |
146 | uint32_t *metric; | |
147 | unsigned int num_nhs; | |
148 | ||
149 | /* | |
150 | * Nexthop structures | |
151 | */ | |
7cf19069 | 152 | struct netlink_nh_info nhs[MULTIPATH_NUM]; |
d62a17ae | 153 | union g_addr *pref_src; |
67ceb408 | 154 | }; |
5adc2528 AS |
155 | |
156 | /* | |
157 | * netlink_route_info_add_nh | |
158 | * | |
159 | * Add information about the given nexthop to the given route info | |
160 | * structure. | |
161 | * | |
2951a7a4 | 162 | * Returns true if a nexthop was added, false otherwise. |
5adc2528 | 163 | */ |
67ceb408 | 164 | static int netlink_route_info_add_nh(struct netlink_route_info *ri, |
9d21b7c6 AD |
165 | struct nexthop *nexthop, |
166 | struct route_entry *re) | |
5adc2528 | 167 | { |
7cf19069 | 168 | struct netlink_nh_info nhi; |
d62a17ae | 169 | union g_addr *src; |
1b09e77e AD |
170 | struct zebra_vrf *zvrf = NULL; |
171 | struct interface *ifp = NULL, *link_if = NULL; | |
172 | struct zebra_if *zif = NULL; | |
173 | vni_t vni = 0; | |
d62a17ae | 174 | |
175 | memset(&nhi, 0, sizeof(nhi)); | |
176 | src = NULL; | |
177 | ||
7e3a1ec7 | 178 | if (ri->num_nhs >= (int)array_size(ri->nhs)) |
d62a17ae | 179 | return 0; |
180 | ||
181 | nhi.recursive = nexthop->rparent ? 1 : 0; | |
182 | nhi.type = nexthop->type; | |
183 | nhi.if_index = nexthop->ifindex; | |
eca3256d | 184 | nhi.weight = nexthop->weight; |
d62a17ae | 185 | |
186 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
187 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
188 | nhi.gateway = &nexthop->gate; | |
975a328e | 189 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 190 | src = &nexthop->src; |
191 | } | |
192 | ||
193 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
194 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
316d2d52 NK |
195 | /* Special handling for IPv4 route with IPv6 Link Local next hop |
196 | */ | |
197 | if (ri->af == AF_INET) | |
198 | nhi.gateway = &ipv4ll_gateway; | |
199 | else | |
200 | nhi.gateway = &nexthop->gate; | |
d62a17ae | 201 | } |
202 | ||
203 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
975a328e | 204 | if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 205 | src = &nexthop->src; |
206 | } | |
207 | ||
208 | if (!nhi.gateway && nhi.if_index == 0) | |
209 | return 0; | |
210 | ||
5609e70f | 211 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN)) { |
9d21b7c6 AD |
212 | nhi.encap_info.encap_type = FPM_NH_ENCAP_VXLAN; |
213 | ||
1b09e77e AD |
214 | /* Extract VNI id for the nexthop SVI interface */ |
215 | zvrf = zebra_vrf_lookup_by_id(nexthop->vrf_id); | |
216 | if (zvrf) { | |
217 | ifp = if_lookup_by_index_per_ns(zvrf->zns, | |
218 | nexthop->ifindex); | |
219 | if (ifp) { | |
220 | zif = (struct zebra_if *)ifp->info; | |
221 | if (zif) { | |
222 | if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
223 | link_if = ifp; | |
224 | else if (IS_ZEBRA_IF_VLAN(ifp)) | |
225 | link_if = | |
226 | if_lookup_by_index_per_ns( | |
227 | zvrf->zns, | |
228 | zif->link_ifindex); | |
229 | if (link_if) | |
230 | vni = vni_id_from_svi(ifp, | |
231 | link_if); | |
232 | } | |
233 | } | |
9d21b7c6 | 234 | } |
1b09e77e AD |
235 | |
236 | nhi.encap_info.vxlan_encap.vni = vni; | |
9d21b7c6 AD |
237 | } |
238 | ||
d62a17ae | 239 | /* |
240 | * We have a valid nhi. Copy the structure over to the route_info. | |
241 | */ | |
242 | ri->nhs[ri->num_nhs] = nhi; | |
243 | ri->num_nhs++; | |
244 | ||
245 | if (src && !ri->pref_src) | |
246 | ri->pref_src = src; | |
247 | ||
248 | return 1; | |
5adc2528 AS |
249 | } |
250 | ||
251 | /* | |
252 | * netlink_proto_from_route_type | |
253 | */ | |
d7c0a89a | 254 | static uint8_t netlink_proto_from_route_type(int type) |
5adc2528 | 255 | { |
d62a17ae | 256 | switch (type) { |
257 | case ZEBRA_ROUTE_KERNEL: | |
258 | case ZEBRA_ROUTE_CONNECT: | |
259 | return RTPROT_KERNEL; | |
260 | ||
261 | default: | |
262 | return RTPROT_ZEBRA; | |
263 | } | |
5adc2528 AS |
264 | } |
265 | ||
266 | /* | |
267 | * netlink_route_info_fill | |
268 | * | |
269 | * Fill out the route information object from the given route. | |
270 | * | |
2951a7a4 | 271 | * Returns true on success and false on failure. |
5adc2528 | 272 | */ |
67ceb408 | 273 | static int netlink_route_info_fill(struct netlink_route_info *ri, int cmd, |
d62a17ae | 274 | rib_dest_t *dest, struct route_entry *re) |
5adc2528 | 275 | { |
d62a17ae | 276 | struct nexthop *nexthop; |
869a5f71 DE |
277 | struct rib_table_info *table_info = |
278 | rib_table_info(rib_dest_table(dest)); | |
279 | struct zebra_vrf *zvrf = table_info->zvrf; | |
d62a17ae | 280 | |
281 | memset(ri, 0, sizeof(*ri)); | |
282 | ||
283 | ri->prefix = rib_dest_prefix(dest); | |
284 | ri->af = rib_dest_af(dest); | |
285 | ||
869a5f71 | 286 | if (zvrf && zvrf->zns) |
80dcc388 | 287 | ri->nlmsg_pid = zvrf->zns->netlink_dplane_out.snl.nl_pid; |
869a5f71 | 288 | |
d62a17ae | 289 | ri->nlmsg_type = cmd; |
869a5f71 | 290 | ri->rtm_table = table_info->table_id; |
d62a17ae | 291 | ri->rtm_protocol = RTPROT_UNSPEC; |
292 | ||
293 | /* | |
294 | * An RTM_DELROUTE need not be accompanied by any nexthops, | |
295 | * particularly in our communication with the FPM. | |
296 | */ | |
297 | if (cmd == RTM_DELROUTE && !re) | |
298 | return 1; | |
299 | ||
300 | if (!re) { | |
5e81f5dd | 301 | zfpm_debug("%s: Expected non-NULL re pointer", __func__); |
d62a17ae | 302 | return 0; |
303 | } | |
304 | ||
305 | ri->rtm_protocol = netlink_proto_from_route_type(re->type); | |
a8309422 | 306 | ri->rtm_type = RTN_UNICAST; |
d62a17ae | 307 | ri->metric = &re->metric; |
308 | ||
c415d895 | 309 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) { |
b3f2b590 | 310 | if (ri->num_nhs >= zrouter.multipath_num) |
d62a17ae | 311 | break; |
312 | ||
313 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
314 | continue; | |
315 | ||
a8309422 DL |
316 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { |
317 | switch (nexthop->bh_type) { | |
318 | case BLACKHOLE_ADMINPROHIB: | |
319 | ri->rtm_type = RTN_PROHIBIT; | |
320 | break; | |
321 | case BLACKHOLE_REJECT: | |
322 | ri->rtm_type = RTN_UNREACHABLE; | |
323 | break; | |
324 | case BLACKHOLE_NULL: | |
325 | default: | |
326 | ri->rtm_type = RTN_BLACKHOLE; | |
327 | break; | |
328 | } | |
a8309422 DL |
329 | } |
330 | ||
d62a17ae | 331 | if ((cmd == RTM_NEWROUTE |
332 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
333 | || (cmd == RTM_DELROUTE | |
677c1dd5 | 334 | && CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED))) { |
9d21b7c6 | 335 | netlink_route_info_add_nh(ri, nexthop, re); |
d62a17ae | 336 | } |
337 | } | |
338 | ||
94f77863 DE |
339 | if (ri->num_nhs == 0) { |
340 | switch (ri->rtm_type) { | |
341 | case RTN_PROHIBIT: | |
342 | case RTN_UNREACHABLE: | |
343 | case RTN_BLACKHOLE: | |
344 | break; | |
345 | default: | |
346 | /* If there is no useful nexthop then return. */ | |
347 | zfpm_debug( | |
348 | "netlink_encode_route(): No useful nexthop."); | |
349 | return 0; | |
350 | } | |
d62a17ae | 351 | } |
352 | ||
353 | return 1; | |
5adc2528 AS |
354 | } |
355 | ||
356 | /* | |
357 | * netlink_route_info_encode | |
358 | * | |
359 | * Returns the number of bytes written to the buffer. 0 or a negative | |
360 | * value indicates an error. | |
361 | */ | |
67ceb408 DS |
362 | static int netlink_route_info_encode(struct netlink_route_info *ri, |
363 | char *in_buf, size_t in_buf_len) | |
5adc2528 | 364 | { |
d62a17ae | 365 | size_t bytelen; |
366 | unsigned int nexthop_num = 0; | |
367 | size_t buf_offset; | |
7cf19069 | 368 | struct netlink_nh_info *nhi; |
9d21b7c6 | 369 | enum fpm_nh_encap_type_t encap; |
312a6bee JU |
370 | struct rtattr *nest, *inner_nest; |
371 | struct rtnexthop *rtnh; | |
9d21b7c6 | 372 | struct vxlan_encap_info_t *vxlan; |
92d6f769 | 373 | struct in6_addr ipv6; |
5adc2528 | 374 | |
d62a17ae | 375 | struct { |
376 | struct nlmsghdr n; | |
377 | struct rtmsg r; | |
378 | char buf[1]; | |
379 | } * req; | |
5adc2528 | 380 | |
d62a17ae | 381 | req = (void *)in_buf; |
5adc2528 | 382 | |
d62a17ae | 383 | buf_offset = ((char *)req->buf) - ((char *)req); |
5adc2528 | 384 | |
d62a17ae | 385 | if (in_buf_len < buf_offset) { |
386 | assert(0); | |
387 | return 0; | |
388 | } | |
5adc2528 | 389 | |
d62a17ae | 390 | memset(req, 0, buf_offset); |
5adc2528 | 391 | |
d62a17ae | 392 | bytelen = af_addr_size(ri->af); |
5adc2528 | 393 | |
d62a17ae | 394 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
395 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
869a5f71 | 396 | req->n.nlmsg_pid = ri->nlmsg_pid; |
d62a17ae | 397 | req->n.nlmsg_type = ri->nlmsg_type; |
398 | req->r.rtm_family = ri->af; | |
6dfcd754 AD |
399 | |
400 | /* | |
f5267398 | 401 | * rtm_table field is a uchar field which can accommodate table_id less |
6dfcd754 AD |
402 | * than 256. |
403 | * To support table id greater than 255, if the table_id is greater than | |
404 | * 255, set rtm_table to RT_TABLE_UNSPEC and add RTA_TABLE attribute | |
405 | * with 32 bit value as the table_id. | |
406 | */ | |
407 | if (ri->rtm_table < 256) | |
408 | req->r.rtm_table = ri->rtm_table; | |
409 | else { | |
410 | req->r.rtm_table = RT_TABLE_UNSPEC; | |
312a6bee | 411 | nl_attr_put32(&req->n, in_buf_len, RTA_TABLE, ri->rtm_table); |
6dfcd754 AD |
412 | } |
413 | ||
d62a17ae | 414 | req->r.rtm_dst_len = ri->prefix->prefixlen; |
415 | req->r.rtm_protocol = ri->rtm_protocol; | |
416 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
5adc2528 | 417 | |
312a6bee JU |
418 | nl_attr_put(&req->n, in_buf_len, RTA_DST, &ri->prefix->u.prefix, |
419 | bytelen); | |
5adc2528 | 420 | |
d62a17ae | 421 | req->r.rtm_type = ri->rtm_type; |
5adc2528 | 422 | |
d62a17ae | 423 | /* Metric. */ |
424 | if (ri->metric) | |
312a6bee | 425 | nl_attr_put32(&req->n, in_buf_len, RTA_PRIORITY, *ri->metric); |
5adc2528 | 426 | |
d62a17ae | 427 | if (ri->num_nhs == 0) |
428 | goto done; | |
5adc2528 | 429 | |
d62a17ae | 430 | if (ri->num_nhs == 1) { |
431 | nhi = &ri->nhs[0]; | |
5adc2528 | 432 | |
d62a17ae | 433 | if (nhi->gateway) { |
92d6f769 K |
434 | if (nhi->type == NEXTHOP_TYPE_IPV4_IFINDEX |
435 | && ri->af == AF_INET6) { | |
436 | ipv4_to_ipv4_mapped_ipv6(&ipv6, | |
437 | nhi->gateway->ipv4); | |
438 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
439 | &ipv6, bytelen); | |
440 | } else | |
441 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
442 | nhi->gateway, bytelen); | |
d62a17ae | 443 | } |
5adc2528 | 444 | |
d62a17ae | 445 | if (nhi->if_index) { |
312a6bee JU |
446 | nl_attr_put32(&req->n, in_buf_len, RTA_OIF, |
447 | nhi->if_index); | |
d62a17ae | 448 | } |
5adc2528 | 449 | |
9d21b7c6 | 450 | encap = nhi->encap_info.encap_type; |
58c3cdb9 DS |
451 | switch (encap) { |
452 | case FPM_NH_ENCAP_NONE: | |
453 | case FPM_NH_ENCAP_MAX: | |
454 | break; | |
455 | case FPM_NH_ENCAP_VXLAN: | |
312a6bee JU |
456 | nl_attr_put16(&req->n, in_buf_len, RTA_ENCAP_TYPE, |
457 | encap); | |
58c3cdb9 | 458 | vxlan = &nhi->encap_info.vxlan_encap; |
312a6bee JU |
459 | nest = nl_attr_nest(&req->n, in_buf_len, RTA_ENCAP); |
460 | nl_attr_put32(&req->n, in_buf_len, VXLAN_VNI, | |
461 | vxlan->vni); | |
462 | nl_attr_nest_end(&req->n, nest); | |
58c3cdb9 | 463 | break; |
9d21b7c6 AD |
464 | } |
465 | ||
d62a17ae | 466 | goto done; |
5adc2528 AS |
467 | } |
468 | ||
d62a17ae | 469 | /* |
470 | * Multipath case. | |
471 | */ | |
312a6bee | 472 | nest = nl_attr_nest(&req->n, in_buf_len, RTA_MULTIPATH); |
d62a17ae | 473 | |
474 | for (nexthop_num = 0; nexthop_num < ri->num_nhs; nexthop_num++) { | |
312a6bee | 475 | rtnh = nl_attr_rtnh(&req->n, in_buf_len); |
d62a17ae | 476 | nhi = &ri->nhs[nexthop_num]; |
477 | ||
312a6bee JU |
478 | if (nhi->gateway) |
479 | nl_attr_put(&req->n, in_buf_len, RTA_GATEWAY, | |
480 | nhi->gateway, bytelen); | |
d62a17ae | 481 | |
482 | if (nhi->if_index) { | |
483 | rtnh->rtnh_ifindex = nhi->if_index; | |
484 | } | |
485 | ||
eca3256d | 486 | rtnh->rtnh_hops = nhi->weight; |
487 | ||
9d21b7c6 | 488 | encap = nhi->encap_info.encap_type; |
58c3cdb9 DS |
489 | switch (encap) { |
490 | case FPM_NH_ENCAP_NONE: | |
491 | case FPM_NH_ENCAP_MAX: | |
492 | break; | |
493 | case FPM_NH_ENCAP_VXLAN: | |
312a6bee JU |
494 | nl_attr_put16(&req->n, in_buf_len, RTA_ENCAP_TYPE, |
495 | encap); | |
58c3cdb9 | 496 | vxlan = &nhi->encap_info.vxlan_encap; |
312a6bee JU |
497 | inner_nest = |
498 | nl_attr_nest(&req->n, in_buf_len, RTA_ENCAP); | |
499 | nl_attr_put32(&req->n, in_buf_len, VXLAN_VNI, | |
500 | vxlan->vni); | |
501 | nl_attr_nest_end(&req->n, inner_nest); | |
58c3cdb9 | 502 | break; |
9d21b7c6 AD |
503 | } |
504 | ||
312a6bee | 505 | nl_attr_rtnh_end(&req->n, rtnh); |
5adc2528 AS |
506 | } |
507 | ||
312a6bee JU |
508 | nl_attr_nest_end(&req->n, nest); |
509 | assert(nest->rta_len > RTA_LENGTH(0)); | |
5adc2528 AS |
510 | |
511 | done: | |
512 | ||
d62a17ae | 513 | if (ri->pref_src) { |
312a6bee JU |
514 | nl_attr_put(&req->n, in_buf_len, RTA_PREFSRC, &ri->pref_src, |
515 | bytelen); | |
d62a17ae | 516 | } |
5adc2528 | 517 | |
d62a17ae | 518 | assert(req->n.nlmsg_len < in_buf_len); |
519 | return req->n.nlmsg_len; | |
5adc2528 AS |
520 | } |
521 | ||
522 | /* | |
523 | * zfpm_log_route_info | |
524 | * | |
525 | * Helper function to log the information in a route_info structure. | |
526 | */ | |
67ceb408 DS |
527 | static void zfpm_log_route_info(struct netlink_route_info *ri, |
528 | const char *label) | |
5adc2528 | 529 | { |
7cf19069 | 530 | struct netlink_nh_info *nhi; |
d62a17ae | 531 | unsigned int i; |
9bcef951 | 532 | char buf[PREFIX_STRLEN]; |
d62a17ae | 533 | |
5e9f9adb DL |
534 | zfpm_debug("%s : %s %pFX, Proto: %s, Metric: %u", label, |
535 | nl_msg_type_to_str(ri->nlmsg_type), ri->prefix, | |
d62a17ae | 536 | nl_rtproto_to_str(ri->rtm_protocol), |
537 | ri->metric ? *ri->metric : 0); | |
538 | ||
539 | for (i = 0; i < ri->num_nhs; i++) { | |
540 | nhi = &ri->nhs[i]; | |
9bcef951 MS |
541 | |
542 | if (ri->af == AF_INET) | |
543 | inet_ntop(AF_INET, &nhi->gateway, buf, sizeof(buf)); | |
544 | else | |
545 | inet_ntop(AF_INET6, &nhi->gateway, buf, sizeof(buf)); | |
546 | ||
9d21b7c6 | 547 | zfpm_debug(" Intf: %u, Gateway: %s, Recursive: %s, Type: %s, Encap type: %s", |
9bcef951 | 548 | nhi->if_index, buf, nhi->recursive ? "yes" : "no", |
9d21b7c6 AD |
549 | nexthop_type_to_str(nhi->type), |
550 | fpm_nh_encap_type_to_str(nhi->encap_info.encap_type) | |
551 | ); | |
d62a17ae | 552 | } |
5adc2528 AS |
553 | } |
554 | ||
555 | /* | |
556 | * zfpm_netlink_encode_route | |
557 | * | |
558 | * Create a netlink message corresponding to the given route in the | |
559 | * given buffer space. | |
560 | * | |
561 | * Returns the number of bytes written to the buffer. 0 or a negative | |
562 | * value indicates an error. | |
563 | */ | |
d62a17ae | 564 | int zfpm_netlink_encode_route(int cmd, rib_dest_t *dest, struct route_entry *re, |
565 | char *in_buf, size_t in_buf_len) | |
5adc2528 | 566 | { |
67ceb408 | 567 | struct netlink_route_info ri_space, *ri; |
5adc2528 | 568 | |
d62a17ae | 569 | ri = &ri_space; |
5adc2528 | 570 | |
d62a17ae | 571 | if (!netlink_route_info_fill(ri, cmd, dest, re)) |
572 | return 0; | |
5adc2528 | 573 | |
15569c58 | 574 | zfpm_log_route_info(ri, __func__); |
5adc2528 | 575 | |
d62a17ae | 576 | return netlink_route_info_encode(ri, in_buf, in_buf_len); |
5adc2528 | 577 | } |
ddfeb486 | 578 | |
9da60d0a AD |
579 | /* |
580 | * zfpm_netlink_encode_mac | |
581 | * | |
582 | * Create a netlink message corresponding to the given MAC. | |
583 | * | |
584 | * Returns the number of bytes written to the buffer. 0 or a negative | |
585 | * value indicates an error. | |
586 | */ | |
587 | int zfpm_netlink_encode_mac(struct fpm_mac_info_t *mac, char *in_buf, | |
588 | size_t in_buf_len) | |
589 | { | |
9da60d0a AD |
590 | size_t buf_offset; |
591 | ||
c5431822 | 592 | struct macmsg { |
9da60d0a AD |
593 | struct nlmsghdr hdr; |
594 | struct ndmsg ndm; | |
595 | char buf[0]; | |
596 | } *req; | |
597 | req = (void *)in_buf; | |
598 | ||
c5431822 | 599 | buf_offset = offsetof(struct macmsg, buf); |
9da60d0a AD |
600 | if (in_buf_len < buf_offset) |
601 | return 0; | |
602 | memset(req, 0, buf_offset); | |
603 | ||
604 | /* Construct nlmsg header */ | |
605 | req->hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
606 | req->hdr.nlmsg_type = CHECK_FLAG(mac->fpm_flags, ZEBRA_MAC_DELETE_FPM) ? | |
607 | RTM_DELNEIGH : RTM_NEWNEIGH; | |
608 | req->hdr.nlmsg_flags = NLM_F_REQUEST; | |
609 | if (req->hdr.nlmsg_type == RTM_NEWNEIGH) | |
610 | req->hdr.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
611 | ||
612 | /* Construct ndmsg */ | |
613 | req->ndm.ndm_family = AF_BRIDGE; | |
614 | req->ndm.ndm_ifindex = mac->vxlan_if; | |
615 | ||
616 | req->ndm.ndm_state = NUD_REACHABLE; | |
617 | req->ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
618 | if (CHECK_FLAG(mac->zebra_flags, | |
619 | (ZEBRA_MAC_STICKY | ZEBRA_MAC_REMOTE_DEF_GW))) | |
620 | req->ndm.ndm_state |= NUD_NOARP; | |
621 | else | |
622 | req->ndm.ndm_flags |= NTF_EXT_LEARNED; | |
623 | ||
624 | /* Add attributes */ | |
312a6bee JU |
625 | nl_attr_put(&req->hdr, in_buf_len, NDA_LLADDR, &mac->macaddr, 6); |
626 | nl_attr_put(&req->hdr, in_buf_len, NDA_DST, &mac->r_vtep_ip, 4); | |
627 | nl_attr_put32(&req->hdr, in_buf_len, NDA_MASTER, mac->svi_if); | |
628 | nl_attr_put32(&req->hdr, in_buf_len, NDA_VNI, mac->vni); | |
9da60d0a AD |
629 | |
630 | assert(req->hdr.nlmsg_len < in_buf_len); | |
631 | ||
5e9f9adb | 632 | zfpm_debug("Tx %s family %s ifindex %u MAC %pEA DEST %pI4", |
9da60d0a AD |
633 | nl_msg_type_to_str(req->hdr.nlmsg_type), |
634 | nl_family_to_str(req->ndm.ndm_family), req->ndm.ndm_ifindex, | |
5e9f9adb | 635 | &mac->macaddr, &mac->r_vtep_ip); |
9da60d0a AD |
636 | |
637 | return req->hdr.nlmsg_len; | |
638 | } | |
639 | ||
ddfeb486 | 640 | #endif /* HAVE_NETLINK */ |