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718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
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 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
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 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | /* Hack for GNU libc version 2. */ | |
25 | #ifndef MSG_TRUNC | |
26 | #define MSG_TRUNC 0x20 | |
27 | #endif /* MSG_TRUNC */ | |
28 | ||
29 | #include "linklist.h" | |
30 | #include "if.h" | |
31 | #include "log.h" | |
32 | #include "prefix.h" | |
33 | #include "connected.h" | |
34 | #include "table.h" | |
26e2ae36 | 35 | #include "memory.h" |
718e3744 | 36 | #include "rib.h" |
e04ab74d | 37 | #include "thread.h" |
edd7c245 | 38 | #include "privs.h" |
fb018d25 | 39 | #include "nexthop.h" |
78104b9b | 40 | #include "vrf.h" |
718e3744 | 41 | |
42 | #include "zebra/zserv.h" | |
6621ca86 | 43 | #include "zebra/rt.h" |
718e3744 | 44 | #include "zebra/redistribute.h" |
45 | #include "zebra/interface.h" | |
46 | #include "zebra/debug.h" | |
47 | ||
78deec45 | 48 | #include "rt_netlink.h" |
3cadc0cd | 49 | |
1423c809 | 50 | static const struct message nlmsg_str[] = { |
718e3744 | 51 | {RTM_NEWROUTE, "RTM_NEWROUTE"}, |
52 | {RTM_DELROUTE, "RTM_DELROUTE"}, | |
53 | {RTM_GETROUTE, "RTM_GETROUTE"}, | |
54 | {RTM_NEWLINK, "RTM_NEWLINK"}, | |
55 | {RTM_DELLINK, "RTM_DELLINK"}, | |
56 | {RTM_GETLINK, "RTM_GETLINK"}, | |
57 | {RTM_NEWADDR, "RTM_NEWADDR"}, | |
58 | {RTM_DELADDR, "RTM_DELADDR"}, | |
59 | {RTM_GETADDR, "RTM_GETADDR"}, | |
7021c425 | 60 | {0, NULL} |
61 | }; | |
62 | ||
b21b19c5 | 63 | extern struct zebra_t zebrad; |
718e3744 | 64 | |
edd7c245 | 65 | extern struct zebra_privs_t zserv_privs; |
66 | ||
c34b6b57 | 67 | extern u_int32_t nl_rcvbufsize; |
68 | ||
d2fc8896 | 69 | /* Note: on netlink systems, there should be a 1-to-1 mapping between interface |
70 | names and ifindex values. */ | |
71 | static void | |
72 | set_ifindex(struct interface *ifp, unsigned int ifi_index) | |
73 | { | |
74 | struct interface *oifp; | |
75 | ||
76 | if (((oifp = if_lookup_by_index(ifi_index)) != NULL) && (oifp != ifp)) | |
77 | { | |
78 | if (ifi_index == IFINDEX_INTERNAL) | |
79 | zlog_err("Netlink is setting interface %s ifindex to reserved " | |
80 | "internal value %u", ifp->name, ifi_index); | |
81 | else | |
82 | { | |
83 | if (IS_ZEBRA_DEBUG_KERNEL) | |
84 | zlog_debug("interface index %d was renamed from %s to %s", | |
85 | ifi_index, oifp->name, ifp->name); | |
86 | if (if_is_up(oifp)) | |
87 | zlog_err("interface rename detected on up interface: index %d " | |
88 | "was renamed from %s to %s, results are uncertain!", | |
89 | ifi_index, oifp->name, ifp->name); | |
90 | if_delete_update(oifp); | |
91 | } | |
92 | } | |
93 | ifp->ifindex = ifi_index; | |
94 | } | |
95 | ||
f1ef81b2 UW |
96 | #ifndef SO_RCVBUFFORCE |
97 | #define SO_RCVBUFFORCE (33) | |
98 | #endif | |
99 | ||
30afea3b SH |
100 | static int |
101 | netlink_recvbuf (struct nlsock *nl, uint32_t newsize) | |
102 | { | |
103 | u_int32_t oldsize; | |
104 | socklen_t newlen = sizeof(newsize); | |
105 | socklen_t oldlen = sizeof(oldsize); | |
106 | int ret; | |
107 | ||
108 | ret = getsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &oldsize, &oldlen); | |
109 | if (ret < 0) | |
110 | { | |
111 | zlog (NULL, LOG_ERR, "Can't get %s receive buffer size: %s", nl->name, | |
112 | safe_strerror (errno)); | |
113 | return -1; | |
114 | } | |
115 | ||
f1ef81b2 UW |
116 | /* Try force option (linux >= 2.6.14) and fall back to normal set */ |
117 | if ( zserv_privs.change (ZPRIVS_RAISE) ) | |
118 | zlog_err ("routing_socket: Can't raise privileges"); | |
119 | ret = setsockopt(nl->sock, SOL_SOCKET, SO_RCVBUFFORCE, &nl_rcvbufsize, | |
30afea3b | 120 | sizeof(nl_rcvbufsize)); |
f1ef81b2 UW |
121 | if ( zserv_privs.change (ZPRIVS_LOWER) ) |
122 | zlog_err ("routing_socket: Can't lower privileges"); | |
123 | if (ret < 0) | |
124 | ret = setsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &nl_rcvbufsize, | |
125 | sizeof(nl_rcvbufsize)); | |
30afea3b SH |
126 | if (ret < 0) |
127 | { | |
128 | zlog (NULL, LOG_ERR, "Can't set %s receive buffer size: %s", nl->name, | |
129 | safe_strerror (errno)); | |
130 | return -1; | |
131 | } | |
132 | ||
133 | ret = getsockopt(nl->sock, SOL_SOCKET, SO_RCVBUF, &newsize, &newlen); | |
134 | if (ret < 0) | |
135 | { | |
136 | zlog (NULL, LOG_ERR, "Can't get %s receive buffer size: %s", nl->name, | |
137 | safe_strerror (errno)); | |
138 | return -1; | |
139 | } | |
140 | ||
141 | zlog (NULL, LOG_INFO, | |
142 | "Setting netlink socket receive buffer size: %u -> %u", | |
143 | oldsize, newsize); | |
144 | return 0; | |
145 | } | |
146 | ||
718e3744 | 147 | /* Make socket for Linux netlink interface. */ |
148 | static int | |
8f7d9fc0 | 149 | netlink_socket (struct nlsock *nl, unsigned long groups, vrf_id_t vrf_id) |
718e3744 | 150 | { |
151 | int ret; | |
152 | struct sockaddr_nl snl; | |
153 | int sock; | |
154 | int namelen; | |
4be019d5 | 155 | int save_errno; |
718e3744 | 156 | |
8e998b1e MS |
157 | if (zserv_privs.change (ZPRIVS_RAISE)) |
158 | { | |
159 | zlog (NULL, LOG_ERR, "Can't raise privileges"); | |
160 | return -1; | |
161 | } | |
162 | ||
8f7d9fc0 | 163 | sock = vrf_socket (AF_NETLINK, SOCK_RAW, NETLINK_ROUTE, vrf_id); |
718e3744 | 164 | if (sock < 0) |
165 | { | |
166 | zlog (NULL, LOG_ERR, "Can't open %s socket: %s", nl->name, | |
6099b3b5 | 167 | safe_strerror (errno)); |
718e3744 | 168 | return -1; |
169 | } | |
170 | ||
718e3744 | 171 | memset (&snl, 0, sizeof snl); |
172 | snl.nl_family = AF_NETLINK; | |
173 | snl.nl_groups = groups; | |
174 | ||
175 | /* Bind the socket to the netlink structure for anything. */ | |
176 | ret = bind (sock, (struct sockaddr *) &snl, sizeof snl); | |
4be019d5 | 177 | save_errno = errno; |
55e7ecd1 | 178 | if (zserv_privs.change (ZPRIVS_LOWER)) |
179 | zlog (NULL, LOG_ERR, "Can't lower privileges"); | |
180 | ||
718e3744 | 181 | if (ret < 0) |
182 | { | |
7021c425 | 183 | zlog (NULL, LOG_ERR, "Can't bind %s socket to group 0x%x: %s", |
4be019d5 | 184 | nl->name, snl.nl_groups, safe_strerror (save_errno)); |
718e3744 | 185 | close (sock); |
186 | return -1; | |
187 | } | |
7021c425 | 188 | |
718e3744 | 189 | /* multiple netlink sockets will have different nl_pid */ |
190 | namelen = sizeof snl; | |
c9e52be3 | 191 | ret = getsockname (sock, (struct sockaddr *) &snl, (socklen_t *) &namelen); |
718e3744 | 192 | if (ret < 0 || namelen != sizeof snl) |
193 | { | |
194 | zlog (NULL, LOG_ERR, "Can't get %s socket name: %s", nl->name, | |
6099b3b5 | 195 | safe_strerror (errno)); |
718e3744 | 196 | close (sock); |
197 | return -1; | |
198 | } | |
199 | ||
200 | nl->snl = snl; | |
201 | nl->sock = sock; | |
202 | return ret; | |
203 | } | |
204 | ||
205 | /* Get type specified information from netlink. */ | |
206 | static int | |
207 | netlink_request (int family, int type, struct nlsock *nl) | |
208 | { | |
209 | int ret; | |
210 | struct sockaddr_nl snl; | |
4be019d5 | 211 | int save_errno; |
718e3744 | 212 | |
213 | struct | |
214 | { | |
215 | struct nlmsghdr nlh; | |
216 | struct rtgenmsg g; | |
217 | } req; | |
218 | ||
718e3744 | 219 | /* Check netlink socket. */ |
220 | if (nl->sock < 0) | |
221 | { | |
222 | zlog (NULL, LOG_ERR, "%s socket isn't active.", nl->name); | |
223 | return -1; | |
224 | } | |
225 | ||
226 | memset (&snl, 0, sizeof snl); | |
227 | snl.nl_family = AF_NETLINK; | |
228 | ||
c05612b9 | 229 | memset (&req, 0, sizeof req); |
718e3744 | 230 | req.nlh.nlmsg_len = sizeof req; |
231 | req.nlh.nlmsg_type = type; | |
232 | req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
3d265b4d | 233 | req.nlh.nlmsg_pid = nl->snl.nl_pid; |
718e3744 | 234 | req.nlh.nlmsg_seq = ++nl->seq; |
235 | req.g.rtgen_family = family; | |
edd7c245 | 236 | |
237 | /* linux appears to check capabilities on every message | |
238 | * have to raise caps for every message sent | |
239 | */ | |
7021c425 | 240 | if (zserv_privs.change (ZPRIVS_RAISE)) |
edd7c245 | 241 | { |
242 | zlog (NULL, LOG_ERR, "Can't raise privileges"); | |
243 | return -1; | |
244 | } | |
7021c425 | 245 | |
246 | ret = sendto (nl->sock, (void *) &req, sizeof req, 0, | |
7a4bb9c5 | 247 | (struct sockaddr *) &snl, sizeof snl); |
4be019d5 | 248 | save_errno = errno; |
7021c425 | 249 | |
250 | if (zserv_privs.change (ZPRIVS_LOWER)) | |
251 | zlog (NULL, LOG_ERR, "Can't lower privileges"); | |
252 | ||
718e3744 | 253 | if (ret < 0) |
7021c425 | 254 | { |
255 | zlog (NULL, LOG_ERR, "%s sendto failed: %s", nl->name, | |
4be019d5 | 256 | safe_strerror (save_errno)); |
718e3744 | 257 | return -1; |
258 | } | |
edd7c245 | 259 | |
718e3744 | 260 | return 0; |
261 | } | |
262 | ||
263 | /* Receive message from netlink interface and pass those information | |
264 | to the given function. */ | |
265 | static int | |
8f7d9fc0 FL |
266 | netlink_parse_info (int (*filter) (struct sockaddr_nl *, struct nlmsghdr *, |
267 | vrf_id_t), | |
268 | struct nlsock *nl, struct zebra_vrf *zvrf) | |
718e3744 | 269 | { |
270 | int status; | |
271 | int ret = 0; | |
272 | int error; | |
273 | ||
274 | while (1) | |
275 | { | |
3cadc0cd | 276 | char buf[NL_PKT_BUF_SIZE]; |
c299ed71 TT |
277 | struct iovec iov = { |
278 | .iov_base = buf, | |
279 | .iov_len = sizeof buf | |
280 | }; | |
718e3744 | 281 | struct sockaddr_nl snl; |
c299ed71 TT |
282 | struct msghdr msg = { |
283 | .msg_name = (void *) &snl, | |
284 | .msg_namelen = sizeof snl, | |
285 | .msg_iov = &iov, | |
286 | .msg_iovlen = 1 | |
287 | }; | |
718e3744 | 288 | struct nlmsghdr *h; |
7021c425 | 289 | |
718e3744 | 290 | status = recvmsg (nl->sock, &msg, 0); |
718e3744 | 291 | if (status < 0) |
7021c425 | 292 | { |
4c699477 | 293 | if (errno == EINTR) |
7021c425 | 294 | continue; |
4c699477 | 295 | if (errno == EWOULDBLOCK || errno == EAGAIN) |
7021c425 | 296 | break; |
4be019d5 | 297 | zlog (NULL, LOG_ERR, "%s recvmsg overrun: %s", |
4c699477 | 298 | nl->name, safe_strerror(errno)); |
7021c425 | 299 | continue; |
300 | } | |
718e3744 | 301 | |
302 | if (status == 0) | |
7021c425 | 303 | { |
304 | zlog (NULL, LOG_ERR, "%s EOF", nl->name); | |
305 | return -1; | |
306 | } | |
718e3744 | 307 | |
308 | if (msg.msg_namelen != sizeof snl) | |
7021c425 | 309 | { |
310 | zlog (NULL, LOG_ERR, "%s sender address length error: length %d", | |
311 | nl->name, msg.msg_namelen); | |
312 | return -1; | |
313 | } | |
b84d3a1b | 314 | |
206d8055 | 315 | for (h = (struct nlmsghdr *) buf; NLMSG_OK (h, (unsigned int) status); |
7021c425 | 316 | h = NLMSG_NEXT (h, status)) |
317 | { | |
318 | /* Finish of reading. */ | |
319 | if (h->nlmsg_type == NLMSG_DONE) | |
320 | return ret; | |
321 | ||
322 | /* Error handling. */ | |
323 | if (h->nlmsg_type == NLMSG_ERROR) | |
324 | { | |
325 | struct nlmsgerr *err = (struct nlmsgerr *) NLMSG_DATA (h); | |
898987e9 SH |
326 | int errnum = err->error; |
327 | int msg_type = err->msg.nlmsg_type; | |
7021c425 | 328 | |
718e3744 | 329 | /* If the error field is zero, then this is an ACK */ |
7021c425 | 330 | if (err->error == 0) |
718e3744 | 331 | { |
7021c425 | 332 | if (IS_ZEBRA_DEBUG_KERNEL) |
333 | { | |
1ada8198 | 334 | zlog_debug ("%s: %s ACK: type=%s(%u), seq=%u, pid=%u", |
7021c425 | 335 | __FUNCTION__, nl->name, |
336 | lookup (nlmsg_str, err->msg.nlmsg_type), | |
337 | err->msg.nlmsg_type, err->msg.nlmsg_seq, | |
338 | err->msg.nlmsg_pid); | |
718e3744 | 339 | } |
7021c425 | 340 | |
341 | /* return if not a multipart message, otherwise continue */ | |
342 | if (!(h->nlmsg_flags & NLM_F_MULTI)) | |
343 | { | |
344 | return 0; | |
718e3744 | 345 | } |
7021c425 | 346 | continue; |
718e3744 | 347 | } |
7021c425 | 348 | |
718e3744 | 349 | if (h->nlmsg_len < NLMSG_LENGTH (sizeof (struct nlmsgerr))) |
7021c425 | 350 | { |
351 | zlog (NULL, LOG_ERR, "%s error: message truncated", | |
352 | nl->name); | |
353 | return -1; | |
354 | } | |
355 | ||
898987e9 | 356 | /* Deal with errors that occur because of races in link handling */ |
8f7d9fc0 | 357 | if (nl == &zvrf->netlink_cmd |
898987e9 SH |
358 | && ((msg_type == RTM_DELROUTE && |
359 | (-errnum == ENODEV || -errnum == ESRCH)) | |
360 | || (msg_type == RTM_NEWROUTE && -errnum == EEXIST))) | |
361 | { | |
362 | if (IS_ZEBRA_DEBUG_KERNEL) | |
363 | zlog_debug ("%s: error: %s type=%s(%u), seq=%u, pid=%u", | |
364 | nl->name, safe_strerror (-errnum), | |
365 | lookup (nlmsg_str, msg_type), | |
366 | msg_type, err->msg.nlmsg_seq, err->msg.nlmsg_pid); | |
367 | return 0; | |
368 | } | |
369 | ||
8f7d9fc0 | 370 | if (nl == &zvrf->netlink_cmd |
b881a424 DS |
371 | && msg_type == RTM_NEWROUTE && -errnum == ESRCH) |
372 | { | |
373 | /* This is known to happen in some situations, don't log | |
374 | * as error. | |
375 | */ | |
376 | if (IS_ZEBRA_DEBUG_KERNEL) | |
377 | zlog_debug ("%s error: %s, type=%s(%u), seq=%u, pid=%u", | |
378 | nl->name, safe_strerror (-errnum), | |
379 | lookup (nlmsg_str, msg_type), | |
380 | msg_type, err->msg.nlmsg_seq, err->msg.nlmsg_pid); | |
381 | } | |
382 | else | |
383 | zlog_err ("%s error: %s, type=%s(%u), seq=%u, pid=%u", | |
898987e9 SH |
384 | nl->name, safe_strerror (-errnum), |
385 | lookup (nlmsg_str, msg_type), | |
386 | msg_type, err->msg.nlmsg_seq, err->msg.nlmsg_pid); | |
b881a424 | 387 | |
7021c425 | 388 | return -1; |
389 | } | |
390 | ||
391 | /* OK we got netlink message. */ | |
392 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1ada8198 | 393 | zlog_debug ("netlink_parse_info: %s type %s(%u), seq=%u, pid=%u", |
7021c425 | 394 | nl->name, |
395 | lookup (nlmsg_str, h->nlmsg_type), h->nlmsg_type, | |
396 | h->nlmsg_seq, h->nlmsg_pid); | |
397 | ||
599da955 CF |
398 | /* skip unsolicited messages originating from command socket |
399 | * linux sets the originators port-id for {NEW|DEL}ADDR messages, | |
400 | * so this has to be checked here. */ | |
8f7d9fc0 FL |
401 | if (nl != &zvrf->netlink_cmd |
402 | && h->nlmsg_pid == zvrf->netlink_cmd.snl.nl_pid | |
599da955 | 403 | && (h->nlmsg_type != RTM_NEWADDR && h->nlmsg_type != RTM_DELADDR)) |
7021c425 | 404 | { |
405 | if (IS_ZEBRA_DEBUG_KERNEL) | |
b6178002 | 406 | zlog_debug ("netlink_parse_info: %s packet comes from %s", |
8f7d9fc0 | 407 | zvrf->netlink_cmd.name, nl->name); |
7021c425 | 408 | continue; |
409 | } | |
410 | ||
8f7d9fc0 | 411 | error = (*filter) (&snl, h, zvrf->vrf_id); |
7021c425 | 412 | if (error < 0) |
413 | { | |
414 | zlog (NULL, LOG_ERR, "%s filter function error", nl->name); | |
415 | ret = error; | |
416 | } | |
417 | } | |
718e3744 | 418 | |
419 | /* After error care. */ | |
420 | if (msg.msg_flags & MSG_TRUNC) | |
7021c425 | 421 | { |
422 | zlog (NULL, LOG_ERR, "%s error: message truncated", nl->name); | |
423 | continue; | |
424 | } | |
718e3744 | 425 | if (status) |
7021c425 | 426 | { |
427 | zlog (NULL, LOG_ERR, "%s error: data remnant size %d", nl->name, | |
428 | status); | |
429 | return -1; | |
430 | } | |
718e3744 | 431 | } |
432 | return ret; | |
433 | } | |
434 | ||
435 | /* Utility function for parse rtattr. */ | |
436 | static void | |
7021c425 | 437 | netlink_parse_rtattr (struct rtattr **tb, int max, struct rtattr *rta, |
438 | int len) | |
718e3744 | 439 | { |
7021c425 | 440 | while (RTA_OK (rta, len)) |
718e3744 | 441 | { |
442 | if (rta->rta_type <= max) | |
7021c425 | 443 | tb[rta->rta_type] = rta; |
444 | rta = RTA_NEXT (rta, len); | |
718e3744 | 445 | } |
446 | } | |
447 | ||
26e2ae36 JB |
448 | /* Utility function to parse hardware link-layer address and update ifp */ |
449 | static void | |
450 | netlink_interface_update_hw_addr (struct rtattr **tb, struct interface *ifp) | |
451 | { | |
452 | int i; | |
453 | ||
454 | if (tb[IFLA_ADDRESS]) | |
455 | { | |
456 | int hw_addr_len; | |
457 | ||
458 | hw_addr_len = RTA_PAYLOAD (tb[IFLA_ADDRESS]); | |
459 | ||
460 | if (hw_addr_len > INTERFACE_HWADDR_MAX) | |
461 | zlog_warn ("Hardware address is too large: %d", hw_addr_len); | |
462 | else | |
463 | { | |
464 | ifp->hw_addr_len = hw_addr_len; | |
465 | memcpy (ifp->hw_addr, RTA_DATA (tb[IFLA_ADDRESS]), hw_addr_len); | |
466 | ||
467 | for (i = 0; i < hw_addr_len; i++) | |
468 | if (ifp->hw_addr[i] != 0) | |
469 | break; | |
470 | ||
471 | if (i == hw_addr_len) | |
472 | ifp->hw_addr_len = 0; | |
473 | else | |
474 | ifp->hw_addr_len = hw_addr_len; | |
475 | } | |
476 | } | |
477 | } | |
478 | ||
718e3744 | 479 | /* Called from interface_lookup_netlink(). This function is only used |
480 | during bootstrap. */ | |
6072b24e | 481 | static int |
8f7d9fc0 FL |
482 | netlink_interface (struct sockaddr_nl *snl, struct nlmsghdr *h, |
483 | vrf_id_t vrf_id) | |
718e3744 | 484 | { |
485 | int len; | |
486 | struct ifinfomsg *ifi; | |
487 | struct rtattr *tb[IFLA_MAX + 1]; | |
488 | struct interface *ifp; | |
489 | char *name; | |
718e3744 | 490 | |
491 | ifi = NLMSG_DATA (h); | |
492 | ||
493 | if (h->nlmsg_type != RTM_NEWLINK) | |
494 | return 0; | |
495 | ||
496 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct ifinfomsg)); | |
497 | if (len < 0) | |
498 | return -1; | |
499 | ||
500 | /* Looking up interface name. */ | |
501 | memset (tb, 0, sizeof tb); | |
502 | netlink_parse_rtattr (tb, IFLA_MAX, IFLA_RTA (ifi), len); | |
c15cb242 | 503 | |
1e193152 | 504 | #ifdef IFLA_WIRELESS |
c15cb242 | 505 | /* check for wireless messages to ignore */ |
506 | if ((tb[IFLA_WIRELESS] != NULL) && (ifi->ifi_change == 0)) | |
507 | { | |
508 | if (IS_ZEBRA_DEBUG_KERNEL) | |
509 | zlog_debug ("%s: ignoring IFLA_WIRELESS message", __func__); | |
510 | return 0; | |
511 | } | |
1e193152 | 512 | #endif /* IFLA_WIRELESS */ |
c15cb242 | 513 | |
718e3744 | 514 | if (tb[IFLA_IFNAME] == NULL) |
515 | return -1; | |
7021c425 | 516 | name = (char *) RTA_DATA (tb[IFLA_IFNAME]); |
718e3744 | 517 | |
518 | /* Add interface. */ | |
8f7d9fc0 | 519 | ifp = if_get_by_name_vrf (name, vrf_id); |
d2fc8896 | 520 | set_ifindex(ifp, ifi->ifi_index); |
718e3744 | 521 | ifp->flags = ifi->ifi_flags & 0x0000fffff; |
4308abba | 522 | ifp->mtu6 = ifp->mtu = *(uint32_t *) RTA_DATA (tb[IFLA_MTU]); |
db19c856 | 523 | ifp->metric = 0; |
718e3744 | 524 | |
525 | /* Hardware type and address. */ | |
526 | ifp->hw_type = ifi->ifi_type; | |
26e2ae36 | 527 | netlink_interface_update_hw_addr (tb, ifp); |
718e3744 | 528 | |
529 | if_add_update (ifp); | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | /* Lookup interface IPv4/IPv6 address. */ | |
6072b24e | 535 | static int |
8f7d9fc0 FL |
536 | netlink_interface_addr (struct sockaddr_nl *snl, struct nlmsghdr *h, |
537 | vrf_id_t vrf_id) | |
718e3744 | 538 | { |
539 | int len; | |
540 | struct ifaddrmsg *ifa; | |
7021c425 | 541 | struct rtattr *tb[IFA_MAX + 1]; |
718e3744 | 542 | struct interface *ifp; |
e4529636 AS |
543 | void *addr; |
544 | void *broad; | |
718e3744 | 545 | u_char flags = 0; |
546 | char *label = NULL; | |
547 | ||
548 | ifa = NLMSG_DATA (h); | |
549 | ||
7021c425 | 550 | if (ifa->ifa_family != AF_INET |
718e3744 | 551 | #ifdef HAVE_IPV6 |
552 | && ifa->ifa_family != AF_INET6 | |
553 | #endif /* HAVE_IPV6 */ | |
7021c425 | 554 | ) |
718e3744 | 555 | return 0; |
556 | ||
557 | if (h->nlmsg_type != RTM_NEWADDR && h->nlmsg_type != RTM_DELADDR) | |
558 | return 0; | |
559 | ||
7021c425 | 560 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct ifaddrmsg)); |
718e3744 | 561 | if (len < 0) |
562 | return -1; | |
563 | ||
564 | memset (tb, 0, sizeof tb); | |
565 | netlink_parse_rtattr (tb, IFA_MAX, IFA_RTA (ifa), len); | |
566 | ||
8f7d9fc0 | 567 | ifp = if_lookup_by_index_vrf (ifa->ifa_index, vrf_id); |
718e3744 | 568 | if (ifp == NULL) |
569 | { | |
8f7d9fc0 FL |
570 | zlog_err ("netlink_interface_addr can't find interface by index %d vrf %u", |
571 | ifa->ifa_index, vrf_id); | |
718e3744 | 572 | return -1; |
573 | } | |
574 | ||
7021c425 | 575 | if (IS_ZEBRA_DEBUG_KERNEL) /* remove this line to see initial ifcfg */ |
718e3744 | 576 | { |
00df0c1e | 577 | char buf[BUFSIZ]; |
8f7d9fc0 FL |
578 | zlog_debug ("netlink_interface_addr %s %s vrf %u:", |
579 | lookup (nlmsg_str, h->nlmsg_type), ifp->name, vrf_id); | |
718e3744 | 580 | if (tb[IFA_LOCAL]) |
206d8055 | 581 | zlog_debug (" IFA_LOCAL %s/%d", |
582 | inet_ntop (ifa->ifa_family, RTA_DATA (tb[IFA_LOCAL]), | |
583 | buf, BUFSIZ), ifa->ifa_prefixlen); | |
718e3744 | 584 | if (tb[IFA_ADDRESS]) |
206d8055 | 585 | zlog_debug (" IFA_ADDRESS %s/%d", |
586 | inet_ntop (ifa->ifa_family, RTA_DATA (tb[IFA_ADDRESS]), | |
587 | buf, BUFSIZ), ifa->ifa_prefixlen); | |
718e3744 | 588 | if (tb[IFA_BROADCAST]) |
206d8055 | 589 | zlog_debug (" IFA_BROADCAST %s/%d", |
590 | inet_ntop (ifa->ifa_family, RTA_DATA (tb[IFA_BROADCAST]), | |
591 | buf, BUFSIZ), ifa->ifa_prefixlen); | |
00df0c1e | 592 | if (tb[IFA_LABEL] && strcmp (ifp->name, RTA_DATA (tb[IFA_LABEL]))) |
b6178002 | 593 | zlog_debug (" IFA_LABEL %s", (char *)RTA_DATA (tb[IFA_LABEL])); |
d34b8991 | 594 | |
595 | if (tb[IFA_CACHEINFO]) | |
596 | { | |
597 | struct ifa_cacheinfo *ci = RTA_DATA (tb[IFA_CACHEINFO]); | |
598 | zlog_debug (" IFA_CACHEINFO pref %d, valid %d", | |
599 | ci->ifa_prefered, ci->ifa_valid); | |
600 | } | |
718e3744 | 601 | } |
31a476c7 | 602 | |
e4529636 AS |
603 | /* logic copied from iproute2/ip/ipaddress.c:print_addrinfo() */ |
604 | if (tb[IFA_LOCAL] == NULL) | |
605 | tb[IFA_LOCAL] = tb[IFA_ADDRESS]; | |
31a476c7 | 606 | if (tb[IFA_ADDRESS] == NULL) |
607 | tb[IFA_ADDRESS] = tb[IFA_LOCAL]; | |
608 | ||
e4529636 AS |
609 | /* local interface address */ |
610 | addr = (tb[IFA_LOCAL] ? RTA_DATA(tb[IFA_LOCAL]) : NULL); | |
611 | ||
612 | /* is there a peer address? */ | |
e4529636 | 613 | if (tb[IFA_ADDRESS] && |
068fd77c | 614 | memcmp(RTA_DATA(tb[IFA_ADDRESS]), RTA_DATA(tb[IFA_LOCAL]), RTA_PAYLOAD(tb[IFA_ADDRESS]))) |
7021c425 | 615 | { |
e4529636 AS |
616 | broad = RTA_DATA(tb[IFA_ADDRESS]); |
617 | SET_FLAG (flags, ZEBRA_IFA_PEER); | |
7021c425 | 618 | } |
31a476c7 | 619 | else |
e4529636 AS |
620 | /* seeking a broadcast address */ |
621 | broad = (tb[IFA_BROADCAST] ? RTA_DATA(tb[IFA_BROADCAST]) : NULL); | |
00df0c1e | 622 | |
27b47253 PJ |
623 | /* addr is primary key, SOL if we don't have one */ |
624 | if (addr == NULL) | |
625 | { | |
626 | zlog_debug ("%s: NULL address", __func__); | |
627 | return -1; | |
628 | } | |
629 | ||
718e3744 | 630 | /* Flags. */ |
631 | if (ifa->ifa_flags & IFA_F_SECONDARY) | |
632 | SET_FLAG (flags, ZEBRA_IFA_SECONDARY); | |
633 | ||
634 | /* Label */ | |
635 | if (tb[IFA_LABEL]) | |
636 | label = (char *) RTA_DATA (tb[IFA_LABEL]); | |
637 | ||
638 | if (ifp && label && strcmp (ifp->name, label) == 0) | |
639 | label = NULL; | |
640 | ||
641 | /* Register interface address to the interface. */ | |
642 | if (ifa->ifa_family == AF_INET) | |
643 | { | |
7021c425 | 644 | if (h->nlmsg_type == RTM_NEWADDR) |
645 | connected_add_ipv4 (ifp, flags, | |
646 | (struct in_addr *) addr, ifa->ifa_prefixlen, | |
647 | (struct in_addr *) broad, label); | |
648 | else | |
649 | connected_delete_ipv4 (ifp, flags, | |
650 | (struct in_addr *) addr, ifa->ifa_prefixlen, | |
0752ef0b | 651 | (struct in_addr *) broad); |
718e3744 | 652 | } |
653 | #ifdef HAVE_IPV6 | |
654 | if (ifa->ifa_family == AF_INET6) | |
655 | { | |
656 | if (h->nlmsg_type == RTM_NEWADDR) | |
e4529636 | 657 | connected_add_ipv6 (ifp, flags, |
7021c425 | 658 | (struct in6_addr *) addr, ifa->ifa_prefixlen, |
0752ef0b | 659 | (struct in6_addr *) broad, label); |
718e3744 | 660 | else |
7021c425 | 661 | connected_delete_ipv6 (ifp, |
662 | (struct in6_addr *) addr, ifa->ifa_prefixlen, | |
663 | (struct in6_addr *) broad); | |
718e3744 | 664 | } |
7021c425 | 665 | #endif /* HAVE_IPV6 */ |
718e3744 | 666 | |
667 | return 0; | |
668 | } | |
669 | ||
670 | /* Looking up routing table by netlink interface. */ | |
6072b24e | 671 | static int |
8f7d9fc0 FL |
672 | netlink_routing_table (struct sockaddr_nl *snl, struct nlmsghdr *h, |
673 | vrf_id_t vrf_id) | |
718e3744 | 674 | { |
675 | int len; | |
676 | struct rtmsg *rtm; | |
7021c425 | 677 | struct rtattr *tb[RTA_MAX + 1]; |
718e3744 | 678 | u_char flags = 0; |
7021c425 | 679 | |
680 | char anyaddr[16] = { 0 }; | |
718e3744 | 681 | |
682 | int index; | |
683 | int table; | |
34195bf6 | 684 | int metric; |
685 | ||
718e3744 | 686 | void *dest; |
687 | void *gate; | |
7514fb77 | 688 | void *src; |
718e3744 | 689 | |
690 | rtm = NLMSG_DATA (h); | |
691 | ||
692 | if (h->nlmsg_type != RTM_NEWROUTE) | |
693 | return 0; | |
694 | if (rtm->rtm_type != RTN_UNICAST) | |
695 | return 0; | |
696 | ||
697 | table = rtm->rtm_table; | |
7a4bb9c5 DS |
698 | if (!is_zebra_valid_kernel_table(table) && !is_zebra_main_routing_table(table)) |
699 | return 0; | |
718e3744 | 700 | |
7021c425 | 701 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); |
718e3744 | 702 | if (len < 0) |
703 | return -1; | |
704 | ||
705 | memset (tb, 0, sizeof tb); | |
706 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); | |
707 | ||
708 | if (rtm->rtm_flags & RTM_F_CLONED) | |
709 | return 0; | |
710 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
711 | return 0; | |
712 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
713 | return 0; | |
714 | ||
715 | if (rtm->rtm_src_len != 0) | |
716 | return 0; | |
717 | ||
718 | /* Route which inserted by Zebra. */ | |
719 | if (rtm->rtm_protocol == RTPROT_ZEBRA) | |
720 | flags |= ZEBRA_FLAG_SELFROUTE; | |
7021c425 | 721 | |
718e3744 | 722 | index = 0; |
34195bf6 | 723 | metric = 0; |
718e3744 | 724 | dest = NULL; |
725 | gate = NULL; | |
7514fb77 | 726 | src = NULL; |
718e3744 | 727 | |
728 | if (tb[RTA_OIF]) | |
729 | index = *(int *) RTA_DATA (tb[RTA_OIF]); | |
730 | ||
731 | if (tb[RTA_DST]) | |
732 | dest = RTA_DATA (tb[RTA_DST]); | |
733 | else | |
734 | dest = anyaddr; | |
735 | ||
7514fb77 PJ |
736 | if (tb[RTA_PREFSRC]) |
737 | src = RTA_DATA (tb[RTA_PREFSRC]); | |
738 | ||
718e3744 | 739 | if (tb[RTA_GATEWAY]) |
740 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
741 | ||
34195bf6 | 742 | if (tb[RTA_PRIORITY]) |
743 | metric = *(int *) RTA_DATA(tb[RTA_PRIORITY]); | |
744 | ||
718e3744 | 745 | if (rtm->rtm_family == AF_INET) |
746 | { | |
747 | struct prefix_ipv4 p; | |
748 | p.family = AF_INET; | |
749 | memcpy (&p.prefix, dest, 4); | |
750 | p.prefixlen = rtm->rtm_dst_len; | |
751 | ||
26e2ae36 | 752 | if (!tb[RTA_MULTIPATH]) |
7c8ff89e | 753 | rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, 0, flags, &p, gate, src, index, |
8f7d9fc0 | 754 | vrf_id, table, metric, 0, SAFI_UNICAST); |
26e2ae36 JB |
755 | else |
756 | { | |
757 | /* This is a multipath route */ | |
758 | ||
759 | struct rib *rib; | |
760 | struct rtnexthop *rtnh = | |
761 | (struct rtnexthop *) RTA_DATA (tb[RTA_MULTIPATH]); | |
762 | ||
763 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
764 | ||
765 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); | |
766 | rib->type = ZEBRA_ROUTE_KERNEL; | |
767 | rib->distance = 0; | |
768 | rib->flags = flags; | |
769 | rib->metric = metric; | |
8f7d9fc0 | 770 | rib->vrf_id = vrf_id; |
26e2ae36 JB |
771 | rib->table = table; |
772 | rib->nexthop_num = 0; | |
773 | rib->uptime = time (NULL); | |
774 | ||
775 | for (;;) | |
776 | { | |
777 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) | |
778 | break; | |
779 | ||
26e2ae36 JB |
780 | index = rtnh->rtnh_ifindex; |
781 | gate = 0; | |
782 | if (rtnh->rtnh_len > sizeof (*rtnh)) | |
783 | { | |
784 | memset (tb, 0, sizeof (tb)); | |
785 | netlink_parse_rtattr (tb, RTA_MAX, RTNH_DATA (rtnh), | |
786 | rtnh->rtnh_len - sizeof (*rtnh)); | |
787 | if (tb[RTA_GATEWAY]) | |
788 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
789 | } | |
790 | ||
791 | if (gate) | |
792 | { | |
793 | if (index) | |
794 | nexthop_ipv4_ifindex_add (rib, gate, src, index); | |
795 | else | |
796 | nexthop_ipv4_add (rib, gate, src); | |
797 | } | |
798 | else | |
799 | nexthop_ifindex_add (rib, index); | |
800 | ||
801 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
802 | rtnh = RTNH_NEXT(rtnh); | |
803 | } | |
804 | ||
6878b9db DS |
805 | zserv_nexthop_num_warn(__func__, (const struct prefix *)&p, |
806 | rib->nexthop_num); | |
26e2ae36 JB |
807 | if (rib->nexthop_num == 0) |
808 | XFREE (MTYPE_RIB, rib); | |
809 | else | |
14d2bbaa | 810 | rib_add_ipv4_multipath (&p, rib, SAFI_UNICAST); |
26e2ae36 | 811 | } |
718e3744 | 812 | } |
813 | #ifdef HAVE_IPV6 | |
814 | if (rtm->rtm_family == AF_INET6) | |
815 | { | |
816 | struct prefix_ipv6 p; | |
817 | p.family = AF_INET6; | |
818 | memcpy (&p.prefix, dest, 16); | |
819 | p.prefixlen = rtm->rtm_dst_len; | |
820 | ||
8f7d9fc0 | 821 | rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, 0, flags, &p, gate, index, vrf_id, |
78104b9b | 822 | table, metric, 0, SAFI_UNICAST); |
718e3744 | 823 | } |
824 | #endif /* HAVE_IPV6 */ | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
1423c809 | 829 | static const struct message rtproto_str[] = { |
718e3744 | 830 | {RTPROT_REDIRECT, "redirect"}, |
831 | {RTPROT_KERNEL, "kernel"}, | |
832 | {RTPROT_BOOT, "boot"}, | |
833 | {RTPROT_STATIC, "static"}, | |
834 | {RTPROT_GATED, "GateD"}, | |
835 | {RTPROT_RA, "router advertisement"}, | |
836 | {RTPROT_MRT, "MRT"}, | |
837 | {RTPROT_ZEBRA, "Zebra"}, | |
838 | #ifdef RTPROT_BIRD | |
839 | {RTPROT_BIRD, "BIRD"}, | |
840 | #endif /* RTPROT_BIRD */ | |
841 | {0, NULL} | |
842 | }; | |
843 | ||
844 | /* Routing information change from the kernel. */ | |
6072b24e | 845 | static int |
8f7d9fc0 FL |
846 | netlink_route_change (struct sockaddr_nl *snl, struct nlmsghdr *h, |
847 | vrf_id_t vrf_id) | |
718e3744 | 848 | { |
849 | int len; | |
850 | struct rtmsg *rtm; | |
7021c425 | 851 | struct rtattr *tb[RTA_MAX + 1]; |
2037f143 | 852 | u_char zebra_flags = 0; |
7021c425 | 853 | |
854 | char anyaddr[16] = { 0 }; | |
718e3744 | 855 | |
856 | int index; | |
857 | int table; | |
26e2ae36 | 858 | int metric; |
83d16149 | 859 | |
718e3744 | 860 | void *dest; |
861 | void *gate; | |
7514fb77 | 862 | void *src; |
718e3744 | 863 | |
864 | rtm = NLMSG_DATA (h); | |
865 | ||
7021c425 | 866 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) |
718e3744 | 867 | { |
868 | /* If this is not route add/delete message print warning. */ | |
8f7d9fc0 | 869 | zlog_warn ("Kernel message: %d vrf %u\n", h->nlmsg_type, vrf_id); |
718e3744 | 870 | return 0; |
871 | } | |
872 | ||
873 | /* Connected route. */ | |
874 | if (IS_ZEBRA_DEBUG_KERNEL) | |
8f7d9fc0 | 875 | zlog_debug ("%s %s %s proto %s vrf %u", |
7021c425 | 876 | h->nlmsg_type == |
877 | RTM_NEWROUTE ? "RTM_NEWROUTE" : "RTM_DELROUTE", | |
878 | rtm->rtm_family == AF_INET ? "ipv4" : "ipv6", | |
879 | rtm->rtm_type == RTN_UNICAST ? "unicast" : "multicast", | |
8f7d9fc0 FL |
880 | lookup (rtproto_str, rtm->rtm_protocol), |
881 | vrf_id); | |
718e3744 | 882 | |
883 | if (rtm->rtm_type != RTN_UNICAST) | |
884 | { | |
885 | return 0; | |
886 | } | |
887 | ||
888 | table = rtm->rtm_table; | |
7a4bb9c5 | 889 | if (!is_zebra_valid_kernel_table(table) && !is_zebra_main_routing_table(table)) |
718e3744 | 890 | return 0; |
718e3744 | 891 | |
7021c425 | 892 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct rtmsg)); |
718e3744 | 893 | if (len < 0) |
894 | return -1; | |
895 | ||
896 | memset (tb, 0, sizeof tb); | |
897 | netlink_parse_rtattr (tb, RTA_MAX, RTM_RTA (rtm), len); | |
898 | ||
899 | if (rtm->rtm_flags & RTM_F_CLONED) | |
900 | return 0; | |
901 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
902 | return 0; | |
903 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
904 | return 0; | |
905 | ||
906 | if (rtm->rtm_protocol == RTPROT_ZEBRA && h->nlmsg_type == RTM_NEWROUTE) | |
907 | return 0; | |
2037f143 DS |
908 | if (rtm->rtm_protocol == RTPROT_ZEBRA) |
909 | SET_FLAG(zebra_flags, ZEBRA_FLAG_SELFROUTE); | |
718e3744 | 910 | |
911 | if (rtm->rtm_src_len != 0) | |
912 | { | |
8f7d9fc0 | 913 | zlog_warn ("netlink_route_change(): no src len, vrf %u", vrf_id); |
718e3744 | 914 | return 0; |
915 | } | |
7021c425 | 916 | |
718e3744 | 917 | index = 0; |
26e2ae36 | 918 | metric = 0; |
718e3744 | 919 | dest = NULL; |
920 | gate = NULL; | |
7514fb77 | 921 | src = NULL; |
718e3744 | 922 | |
923 | if (tb[RTA_OIF]) | |
924 | index = *(int *) RTA_DATA (tb[RTA_OIF]); | |
925 | ||
926 | if (tb[RTA_DST]) | |
927 | dest = RTA_DATA (tb[RTA_DST]); | |
928 | else | |
929 | dest = anyaddr; | |
930 | ||
931 | if (tb[RTA_GATEWAY]) | |
932 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
933 | ||
7514fb77 PJ |
934 | if (tb[RTA_PREFSRC]) |
935 | src = RTA_DATA (tb[RTA_PREFSRC]); | |
936 | ||
83d16149 | 937 | if (h->nlmsg_type == RTM_NEWROUTE && tb[RTA_PRIORITY]) |
26e2ae36 JB |
938 | metric = *(int *) RTA_DATA(tb[RTA_PRIORITY]); |
939 | ||
718e3744 | 940 | if (rtm->rtm_family == AF_INET) |
941 | { | |
942 | struct prefix_ipv4 p; | |
943 | p.family = AF_INET; | |
944 | memcpy (&p.prefix, dest, 4); | |
945 | p.prefixlen = rtm->rtm_dst_len; | |
946 | ||
947 | if (IS_ZEBRA_DEBUG_KERNEL) | |
7021c425 | 948 | { |
8f7d9fc0 FL |
949 | char buf[BUFSIZ]; |
950 | zlog_debug ("%s %s vrf %u", | |
951 | h->nlmsg_type == RTM_NEWROUTE ? "RTM_NEWROUTE" : "RTM_DELROUTE", | |
952 | prefix2str (&p, buf, sizeof(buf)), vrf_id); | |
7021c425 | 953 | } |
718e3744 | 954 | |
955 | if (h->nlmsg_type == RTM_NEWROUTE) | |
26e2ae36 JB |
956 | { |
957 | if (!tb[RTA_MULTIPATH]) | |
8f7d9fc0 | 958 | rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, 0, 0, &p, gate, src, index, vrf_id, |
78104b9b | 959 | table, metric, 0, SAFI_UNICAST); |
26e2ae36 JB |
960 | else |
961 | { | |
962 | /* This is a multipath route */ | |
963 | ||
964 | struct rib *rib; | |
965 | struct rtnexthop *rtnh = | |
966 | (struct rtnexthop *) RTA_DATA (tb[RTA_MULTIPATH]); | |
967 | ||
968 | len = RTA_PAYLOAD (tb[RTA_MULTIPATH]); | |
969 | ||
970 | rib = XCALLOC (MTYPE_RIB, sizeof (struct rib)); | |
971 | rib->type = ZEBRA_ROUTE_KERNEL; | |
972 | rib->distance = 0; | |
973 | rib->flags = 0; | |
974 | rib->metric = metric; | |
8f7d9fc0 | 975 | rib->vrf_id = vrf_id; |
26e2ae36 JB |
976 | rib->table = table; |
977 | rib->nexthop_num = 0; | |
978 | rib->uptime = time (NULL); | |
979 | ||
980 | for (;;) | |
981 | { | |
982 | if (len < (int) sizeof (*rtnh) || rtnh->rtnh_len > len) | |
983 | break; | |
984 | ||
26e2ae36 JB |
985 | index = rtnh->rtnh_ifindex; |
986 | gate = 0; | |
987 | if (rtnh->rtnh_len > sizeof (*rtnh)) | |
988 | { | |
989 | memset (tb, 0, sizeof (tb)); | |
990 | netlink_parse_rtattr (tb, RTA_MAX, RTNH_DATA (rtnh), | |
991 | rtnh->rtnh_len - sizeof (*rtnh)); | |
992 | if (tb[RTA_GATEWAY]) | |
993 | gate = RTA_DATA (tb[RTA_GATEWAY]); | |
994 | } | |
995 | ||
996 | if (gate) | |
997 | { | |
998 | if (index) | |
999 | nexthop_ipv4_ifindex_add (rib, gate, src, index); | |
1000 | else | |
1001 | nexthop_ipv4_add (rib, gate, src); | |
1002 | } | |
1003 | else | |
1004 | nexthop_ifindex_add (rib, index); | |
1005 | ||
1006 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
1007 | rtnh = RTNH_NEXT(rtnh); | |
1008 | } | |
1009 | ||
6878b9db DS |
1010 | zserv_nexthop_num_warn(__func__, (const struct prefix *)&p, |
1011 | rib->nexthop_num); | |
1012 | ||
26e2ae36 JB |
1013 | if (rib->nexthop_num == 0) |
1014 | XFREE (MTYPE_RIB, rib); | |
1015 | else | |
14d2bbaa | 1016 | rib_add_ipv4_multipath (&p, rib, SAFI_UNICAST); |
26e2ae36 JB |
1017 | } |
1018 | } | |
718e3744 | 1019 | else |
7c8ff89e | 1020 | rib_delete_ipv4 (ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, gate, index, |
8f7d9fc0 | 1021 | vrf_id, table, SAFI_UNICAST); |
718e3744 | 1022 | } |
1023 | ||
1024 | #ifdef HAVE_IPV6 | |
1025 | if (rtm->rtm_family == AF_INET6) | |
1026 | { | |
1027 | struct prefix_ipv6 p; | |
1028 | char buf[BUFSIZ]; | |
1029 | ||
1030 | p.family = AF_INET6; | |
1031 | memcpy (&p.prefix, dest, 16); | |
1032 | p.prefixlen = rtm->rtm_dst_len; | |
1033 | ||
1034 | if (IS_ZEBRA_DEBUG_KERNEL) | |
7021c425 | 1035 | { |
8f7d9fc0 FL |
1036 | zlog_debug ("%s %s vrf %u", |
1037 | h->nlmsg_type == RTM_NEWROUTE ? "RTM_NEWROUTE" : "RTM_DELROUTE", | |
1038 | prefix2str (&p, buf, sizeof(buf)), vrf_id); | |
7021c425 | 1039 | } |
718e3744 | 1040 | |
1041 | if (h->nlmsg_type == RTM_NEWROUTE) | |
8f7d9fc0 | 1042 | rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, 0, 0, &p, gate, index, vrf_id, |
78104b9b | 1043 | table, metric, 0, SAFI_UNICAST); |
718e3744 | 1044 | else |
7c8ff89e | 1045 | rib_delete_ipv6 (ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, gate, index, |
8f7d9fc0 | 1046 | vrf_id, table, SAFI_UNICAST); |
718e3744 | 1047 | } |
1048 | #endif /* HAVE_IPV6 */ | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | ||
6072b24e | 1053 | static int |
8f7d9fc0 FL |
1054 | netlink_link_change (struct sockaddr_nl *snl, struct nlmsghdr *h, |
1055 | vrf_id_t vrf_id) | |
718e3744 | 1056 | { |
1057 | int len; | |
1058 | struct ifinfomsg *ifi; | |
7021c425 | 1059 | struct rtattr *tb[IFLA_MAX + 1]; |
718e3744 | 1060 | struct interface *ifp; |
1061 | char *name; | |
1062 | ||
1063 | ifi = NLMSG_DATA (h); | |
1064 | ||
7021c425 | 1065 | if (!(h->nlmsg_type == RTM_NEWLINK || h->nlmsg_type == RTM_DELLINK)) |
718e3744 | 1066 | { |
1067 | /* If this is not link add/delete message so print warning. */ | |
8f7d9fc0 FL |
1068 | zlog_warn ("netlink_link_change: wrong kernel message %d vrf %u\n", |
1069 | h->nlmsg_type, vrf_id); | |
718e3744 | 1070 | return 0; |
1071 | } | |
1072 | ||
1073 | len = h->nlmsg_len - NLMSG_LENGTH (sizeof (struct ifinfomsg)); | |
1074 | if (len < 0) | |
1075 | return -1; | |
1076 | ||
1077 | /* Looking up interface name. */ | |
1078 | memset (tb, 0, sizeof tb); | |
1079 | netlink_parse_rtattr (tb, IFLA_MAX, IFLA_RTA (ifi), len); | |
c15cb242 | 1080 | |
1e193152 | 1081 | #ifdef IFLA_WIRELESS |
c15cb242 | 1082 | /* check for wireless messages to ignore */ |
1083 | if ((tb[IFLA_WIRELESS] != NULL) && (ifi->ifi_change == 0)) | |
1084 | { | |
1085 | if (IS_ZEBRA_DEBUG_KERNEL) | |
8f7d9fc0 FL |
1086 | zlog_debug ("%s: ignoring IFLA_WIRELESS message, vrf %u", __func__, |
1087 | vrf_id); | |
c15cb242 | 1088 | return 0; |
1089 | } | |
1e193152 | 1090 | #endif /* IFLA_WIRELESS */ |
c15cb242 | 1091 | |
718e3744 | 1092 | if (tb[IFLA_IFNAME] == NULL) |
1093 | return -1; | |
7021c425 | 1094 | name = (char *) RTA_DATA (tb[IFLA_IFNAME]); |
718e3744 | 1095 | |
1096 | /* Add interface. */ | |
1097 | if (h->nlmsg_type == RTM_NEWLINK) | |
1098 | { | |
8f7d9fc0 | 1099 | ifp = if_lookup_by_name_vrf (name, vrf_id); |
718e3744 | 1100 | |
7021c425 | 1101 | if (ifp == NULL || !CHECK_FLAG (ifp->status, ZEBRA_INTERFACE_ACTIVE)) |
1102 | { | |
1103 | if (ifp == NULL) | |
8f7d9fc0 | 1104 | ifp = if_get_by_name_vrf (name, vrf_id); |
718e3744 | 1105 | |
d2fc8896 | 1106 | set_ifindex(ifp, ifi->ifi_index); |
7021c425 | 1107 | ifp->flags = ifi->ifi_flags & 0x0000fffff; |
44145db3 | 1108 | ifp->mtu6 = ifp->mtu = *(int *) RTA_DATA (tb[IFLA_MTU]); |
db19c856 | 1109 | ifp->metric = 0; |
718e3744 | 1110 | |
26e2ae36 JB |
1111 | netlink_interface_update_hw_addr (tb, ifp); |
1112 | ||
7021c425 | 1113 | /* If new link is added. */ |
1114 | if_add_update (ifp); | |
1115 | } | |
718e3744 | 1116 | else |
7021c425 | 1117 | { |
1118 | /* Interface status change. */ | |
d2fc8896 | 1119 | set_ifindex(ifp, ifi->ifi_index); |
44145db3 | 1120 | ifp->mtu6 = ifp->mtu = *(int *) RTA_DATA (tb[IFLA_MTU]); |
db19c856 | 1121 | ifp->metric = 0; |
7021c425 | 1122 | |
26e2ae36 JB |
1123 | netlink_interface_update_hw_addr (tb, ifp); |
1124 | ||
244c1cdc | 1125 | if (if_is_no_ptm_operative (ifp)) |
7021c425 | 1126 | { |
1127 | ifp->flags = ifi->ifi_flags & 0x0000fffff; | |
244c1cdc | 1128 | if (!if_is_no_ptm_operative (ifp)) |
7021c425 | 1129 | if_down (ifp); |
244c1cdc | 1130 | else if (if_is_operative (ifp)) |
a608bbf2 | 1131 | /* Must notify client daemons of new interface status. */ |
1132 | zebra_interface_up_update (ifp); | |
7021c425 | 1133 | } |
1134 | else | |
1135 | { | |
1136 | ifp->flags = ifi->ifi_flags & 0x0000fffff; | |
1137 | if (if_is_operative (ifp)) | |
1138 | if_up (ifp); | |
1139 | } | |
1140 | } | |
718e3744 | 1141 | } |
1142 | else | |
1143 | { | |
1144 | /* RTM_DELLINK. */ | |
8f7d9fc0 | 1145 | ifp = if_lookup_by_name_vrf (name, vrf_id); |
718e3744 | 1146 | |
1147 | if (ifp == NULL) | |
7021c425 | 1148 | { |
8f7d9fc0 FL |
1149 | zlog_warn ("interface %s vrf %u is deleted but can't find", |
1150 | name, vrf_id); | |
7021c425 | 1151 | return 0; |
1152 | } | |
1153 | ||
718e3744 | 1154 | if_delete_update (ifp); |
1155 | } | |
1156 | ||
1157 | return 0; | |
1158 | } | |
1159 | ||
6072b24e | 1160 | static int |
8f7d9fc0 FL |
1161 | netlink_information_fetch (struct sockaddr_nl *snl, struct nlmsghdr *h, |
1162 | vrf_id_t vrf_id) | |
718e3744 | 1163 | { |
3d265b4d SH |
1164 | /* JF: Ignore messages that aren't from the kernel */ |
1165 | if ( snl->nl_pid != 0 ) | |
1166 | { | |
1167 | zlog ( NULL, LOG_ERR, "Ignoring message from pid %u", snl->nl_pid ); | |
1168 | return 0; | |
1169 | } | |
1170 | ||
718e3744 | 1171 | switch (h->nlmsg_type) |
1172 | { | |
1173 | case RTM_NEWROUTE: | |
8f7d9fc0 | 1174 | return netlink_route_change (snl, h, vrf_id); |
718e3744 | 1175 | break; |
1176 | case RTM_DELROUTE: | |
8f7d9fc0 | 1177 | return netlink_route_change (snl, h, vrf_id); |
718e3744 | 1178 | break; |
1179 | case RTM_NEWLINK: | |
8f7d9fc0 | 1180 | return netlink_link_change (snl, h, vrf_id); |
718e3744 | 1181 | break; |
1182 | case RTM_DELLINK: | |
8f7d9fc0 | 1183 | return netlink_link_change (snl, h, vrf_id); |
718e3744 | 1184 | break; |
1185 | case RTM_NEWADDR: | |
8f7d9fc0 | 1186 | return netlink_interface_addr (snl, h, vrf_id); |
718e3744 | 1187 | break; |
1188 | case RTM_DELADDR: | |
8f7d9fc0 | 1189 | return netlink_interface_addr (snl, h, vrf_id); |
718e3744 | 1190 | break; |
1191 | default: | |
8f7d9fc0 FL |
1192 | zlog_warn ("Unknown netlink nlmsg_type %d vrf %u\n", h->nlmsg_type, |
1193 | vrf_id); | |
718e3744 | 1194 | break; |
1195 | } | |
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | /* Interface lookup by netlink socket. */ | |
1200 | int | |
8f7d9fc0 | 1201 | interface_lookup_netlink (struct zebra_vrf *zvrf) |
718e3744 | 1202 | { |
1203 | int ret; | |
7021c425 | 1204 | |
718e3744 | 1205 | /* Get interface information. */ |
8f7d9fc0 | 1206 | ret = netlink_request (AF_PACKET, RTM_GETLINK, &zvrf->netlink_cmd); |
718e3744 | 1207 | if (ret < 0) |
1208 | return ret; | |
8f7d9fc0 | 1209 | ret = netlink_parse_info (netlink_interface, &zvrf->netlink_cmd, zvrf); |
718e3744 | 1210 | if (ret < 0) |
1211 | return ret; | |
1212 | ||
1213 | /* Get IPv4 address of the interfaces. */ | |
8f7d9fc0 | 1214 | ret = netlink_request (AF_INET, RTM_GETADDR, &zvrf->netlink_cmd); |
718e3744 | 1215 | if (ret < 0) |
1216 | return ret; | |
8f7d9fc0 | 1217 | ret = netlink_parse_info (netlink_interface_addr, &zvrf->netlink_cmd, zvrf); |
718e3744 | 1218 | if (ret < 0) |
1219 | return ret; | |
1220 | ||
1221 | #ifdef HAVE_IPV6 | |
1222 | /* Get IPv6 address of the interfaces. */ | |
8f7d9fc0 | 1223 | ret = netlink_request (AF_INET6, RTM_GETADDR, &zvrf->netlink_cmd); |
718e3744 | 1224 | if (ret < 0) |
1225 | return ret; | |
8f7d9fc0 | 1226 | ret = netlink_parse_info (netlink_interface_addr, &zvrf->netlink_cmd, zvrf); |
718e3744 | 1227 | if (ret < 0) |
1228 | return ret; | |
1229 | #endif /* HAVE_IPV6 */ | |
1230 | ||
1231 | return 0; | |
1232 | } | |
1233 | ||
1234 | /* Routing table read function using netlink interface. Only called | |
1235 | bootstrap time. */ | |
1236 | int | |
8f7d9fc0 | 1237 | netlink_route_read (struct zebra_vrf *zvrf) |
718e3744 | 1238 | { |
1239 | int ret; | |
7021c425 | 1240 | |
718e3744 | 1241 | /* Get IPv4 routing table. */ |
8f7d9fc0 | 1242 | ret = netlink_request (AF_INET, RTM_GETROUTE, &zvrf->netlink_cmd); |
718e3744 | 1243 | if (ret < 0) |
1244 | return ret; | |
8f7d9fc0 | 1245 | ret = netlink_parse_info (netlink_routing_table, &zvrf->netlink_cmd, zvrf); |
718e3744 | 1246 | if (ret < 0) |
1247 | return ret; | |
1248 | ||
1249 | #ifdef HAVE_IPV6 | |
1250 | /* Get IPv6 routing table. */ | |
8f7d9fc0 | 1251 | ret = netlink_request (AF_INET6, RTM_GETROUTE, &zvrf->netlink_cmd); |
718e3744 | 1252 | if (ret < 0) |
1253 | return ret; | |
8f7d9fc0 | 1254 | ret = netlink_parse_info (netlink_routing_table, &zvrf->netlink_cmd, zvrf); |
718e3744 | 1255 | if (ret < 0) |
1256 | return ret; | |
1257 | #endif /* HAVE_IPV6 */ | |
1258 | ||
1259 | return 0; | |
1260 | } | |
1261 | ||
1262 | /* Utility function comes from iproute2. | |
1263 | Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> */ | |
78deec45 | 1264 | int |
4e3afb14 | 1265 | addattr_l (struct nlmsghdr *n, unsigned int maxlen, int type, void *data, int alen) |
718e3744 | 1266 | { |
1267 | int len; | |
1268 | struct rtattr *rta; | |
1269 | ||
7021c425 | 1270 | len = RTA_LENGTH (alen); |
718e3744 | 1271 | |
7021c425 | 1272 | if (NLMSG_ALIGN (n->nlmsg_len) + len > maxlen) |
718e3744 | 1273 | return -1; |
1274 | ||
7021c425 | 1275 | rta = (struct rtattr *) (((char *) n) + NLMSG_ALIGN (n->nlmsg_len)); |
718e3744 | 1276 | rta->rta_type = type; |
1277 | rta->rta_len = len; | |
7021c425 | 1278 | memcpy (RTA_DATA (rta), data, alen); |
718e3744 | 1279 | n->nlmsg_len = NLMSG_ALIGN (n->nlmsg_len) + len; |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | ||
78deec45 | 1284 | int |
718e3744 | 1285 | rta_addattr_l (struct rtattr *rta, int maxlen, int type, void *data, int alen) |
1286 | { | |
1287 | int len; | |
1288 | struct rtattr *subrta; | |
1289 | ||
7021c425 | 1290 | len = RTA_LENGTH (alen); |
718e3744 | 1291 | |
7021c425 | 1292 | if (RTA_ALIGN (rta->rta_len) + len > maxlen) |
718e3744 | 1293 | return -1; |
1294 | ||
7021c425 | 1295 | subrta = (struct rtattr *) (((char *) rta) + RTA_ALIGN (rta->rta_len)); |
718e3744 | 1296 | subrta->rta_type = type; |
1297 | subrta->rta_len = len; | |
7021c425 | 1298 | memcpy (RTA_DATA (subrta), data, alen); |
718e3744 | 1299 | rta->rta_len = NLMSG_ALIGN (rta->rta_len) + len; |
1300 | ||
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | /* Utility function comes from iproute2. | |
1305 | Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> */ | |
78deec45 | 1306 | int |
4e3afb14 | 1307 | addattr32 (struct nlmsghdr *n, unsigned int maxlen, int type, int data) |
718e3744 | 1308 | { |
1309 | int len; | |
1310 | struct rtattr *rta; | |
7021c425 | 1311 | |
1312 | len = RTA_LENGTH (4); | |
1313 | ||
718e3744 | 1314 | if (NLMSG_ALIGN (n->nlmsg_len) + len > maxlen) |
1315 | return -1; | |
1316 | ||
7021c425 | 1317 | rta = (struct rtattr *) (((char *) n) + NLMSG_ALIGN (n->nlmsg_len)); |
718e3744 | 1318 | rta->rta_type = type; |
1319 | rta->rta_len = len; | |
7021c425 | 1320 | memcpy (RTA_DATA (rta), &data, 4); |
718e3744 | 1321 | n->nlmsg_len = NLMSG_ALIGN (n->nlmsg_len) + len; |
1322 | ||
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | static int | |
8f7d9fc0 FL |
1327 | netlink_talk_filter (struct sockaddr_nl *snl, struct nlmsghdr *h, |
1328 | vrf_id_t vrf_id) | |
718e3744 | 1329 | { |
8f7d9fc0 FL |
1330 | zlog_warn ("netlink_talk: ignoring message type 0x%04x vrf %u", h->nlmsg_type, |
1331 | vrf_id); | |
718e3744 | 1332 | return 0; |
1333 | } | |
1334 | ||
1335 | /* sendmsg() to netlink socket then recvmsg(). */ | |
6072b24e | 1336 | static int |
8f7d9fc0 | 1337 | netlink_talk (struct nlmsghdr *n, struct nlsock *nl, struct zebra_vrf *zvrf) |
718e3744 | 1338 | { |
1339 | int status; | |
1340 | struct sockaddr_nl snl; | |
c299ed71 TT |
1341 | struct iovec iov = { |
1342 | .iov_base = (void *) n, | |
1343 | .iov_len = n->nlmsg_len | |
1344 | }; | |
1345 | struct msghdr msg = { | |
1346 | .msg_name = (void *) &snl, | |
1347 | .msg_namelen = sizeof snl, | |
1348 | .msg_iov = &iov, | |
1349 | .msg_iovlen = 1, | |
1350 | }; | |
4be019d5 | 1351 | int save_errno; |
7021c425 | 1352 | |
718e3744 | 1353 | memset (&snl, 0, sizeof snl); |
1354 | snl.nl_family = AF_NETLINK; | |
7021c425 | 1355 | |
b7ed1ec7 | 1356 | n->nlmsg_seq = ++nl->seq; |
718e3744 | 1357 | |
1358 | /* Request an acknowledgement by setting NLM_F_ACK */ | |
1359 | n->nlmsg_flags |= NLM_F_ACK; | |
7021c425 | 1360 | |
1361 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6ae24471 DS |
1362 | zlog_debug ("netlink_talk: %s type %s(%u), seq=%u flags 0x%x", |
1363 | nl->name, | |
7021c425 | 1364 | lookup (nlmsg_str, n->nlmsg_type), n->nlmsg_type, |
6ae24471 | 1365 | n->nlmsg_seq, n->nlmsg_flags); |
718e3744 | 1366 | |
1367 | /* Send message to netlink interface. */ | |
7021c425 | 1368 | if (zserv_privs.change (ZPRIVS_RAISE)) |
1369 | zlog (NULL, LOG_ERR, "Can't raise privileges"); | |
718e3744 | 1370 | status = sendmsg (nl->sock, &msg, 0); |
4be019d5 | 1371 | save_errno = errno; |
7021c425 | 1372 | if (zserv_privs.change (ZPRIVS_LOWER)) |
1373 | zlog (NULL, LOG_ERR, "Can't lower privileges"); | |
1374 | ||
718e3744 | 1375 | if (status < 0) |
1376 | { | |
1377 | zlog (NULL, LOG_ERR, "netlink_talk sendmsg() error: %s", | |
4be019d5 | 1378 | safe_strerror (save_errno)); |
718e3744 | 1379 | return -1; |
1380 | } | |
7021c425 | 1381 | |
718e3744 | 1382 | |
1383 | /* | |
1384 | * Get reply from netlink socket. | |
1385 | * The reply should either be an acknowlegement or an error. | |
1386 | */ | |
8f7d9fc0 | 1387 | return netlink_parse_info (netlink_talk_filter, nl, zvrf); |
718e3744 | 1388 | } |
1389 | ||
1390 | /* Routing table change via netlink interface. */ | |
6072b24e | 1391 | static int |
718e3744 | 1392 | netlink_route (int cmd, int family, void *dest, int length, void *gate, |
7021c425 | 1393 | int index, int zebra_flags, int table) |
718e3744 | 1394 | { |
1395 | int ret; | |
1396 | int bytelen; | |
1397 | struct sockaddr_nl snl; | |
1398 | int discard; | |
1399 | ||
8f7d9fc0 FL |
1400 | struct zebra_vrf *zvrf = vrf_info_lookup (VRF_DEFAULT); //Pending |
1401 | ||
7021c425 | 1402 | struct |
718e3744 | 1403 | { |
1404 | struct nlmsghdr n; | |
1405 | struct rtmsg r; | |
3cadc0cd | 1406 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 1407 | } req; |
1408 | ||
a4c06dec | 1409 | memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE); |
718e3744 | 1410 | |
1411 | bytelen = (family == AF_INET ? 4 : 16); | |
1412 | ||
1413 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); | |
1414 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1415 | req.n.nlmsg_type = cmd; | |
1416 | req.r.rtm_family = family; | |
1417 | req.r.rtm_table = table; | |
1418 | req.r.rtm_dst_len = length; | |
40da2216 TT |
1419 | req.r.rtm_protocol = RTPROT_ZEBRA; |
1420 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
718e3744 | 1421 | |
81dfcaa2 | 1422 | if ((zebra_flags & ZEBRA_FLAG_BLACKHOLE) |
1423 | || (zebra_flags & ZEBRA_FLAG_REJECT)) | |
718e3744 | 1424 | discard = 1; |
1425 | else | |
1426 | discard = 0; | |
1427 | ||
7021c425 | 1428 | if (cmd == RTM_NEWROUTE) |
718e3744 | 1429 | { |
7021c425 | 1430 | if (discard) |
595db7f1 | 1431 | { |
1432 | if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) | |
1433 | req.r.rtm_type = RTN_BLACKHOLE; | |
1434 | else if (zebra_flags & ZEBRA_FLAG_REJECT) | |
1435 | req.r.rtm_type = RTN_UNREACHABLE; | |
7021c425 | 1436 | else |
1437 | assert (RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ | |
c3c0ac83 DS |
1438 | |
1439 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1440 | zlog_debug ("%s: Adding discard route for family %s\n", | |
1441 | __FUNCTION__, family == AF_INET ? "IPv4" : "IPv6"); | |
7021c425 | 1442 | } |
595db7f1 | 1443 | else |
7021c425 | 1444 | req.r.rtm_type = RTN_UNICAST; |
718e3744 | 1445 | } |
1446 | ||
1447 | if (dest) | |
1448 | addattr_l (&req.n, sizeof req, RTA_DST, dest, bytelen); | |
1449 | ||
7021c425 | 1450 | if (!discard) |
718e3744 | 1451 | { |
1452 | if (gate) | |
7021c425 | 1453 | addattr_l (&req.n, sizeof req, RTA_GATEWAY, gate, bytelen); |
718e3744 | 1454 | if (index > 0) |
7021c425 | 1455 | addattr32 (&req.n, sizeof req, RTA_OIF, index); |
718e3744 | 1456 | } |
1457 | ||
1458 | /* Destination netlink address. */ | |
1459 | memset (&snl, 0, sizeof snl); | |
1460 | snl.nl_family = AF_NETLINK; | |
1461 | ||
1462 | /* Talk to netlink socket. */ | |
8f7d9fc0 | 1463 | ret = netlink_talk (&req.n, &zvrf->netlink_cmd, VRF_DEFAULT); |
718e3744 | 1464 | if (ret < 0) |
1465 | return -1; | |
1466 | ||
1467 | return 0; | |
1468 | } | |
1469 | ||
fa713d9e CF |
1470 | /* This function takes a nexthop as argument and adds |
1471 | * the appropriate netlink attributes to an existing | |
1472 | * netlink message. | |
1473 | * | |
1474 | * @param routedesc: Human readable description of route type | |
1475 | * (direct/recursive, single-/multipath) | |
1476 | * @param bytelen: Length of addresses in bytes. | |
1477 | * @param nexthop: Nexthop information | |
1478 | * @param nlmsg: nlmsghdr structure to fill in. | |
1479 | * @param req_size: The size allocated for the message. | |
1480 | */ | |
1481 | static void | |
1482 | _netlink_route_build_singlepath( | |
1483 | const char *routedesc, | |
1484 | int bytelen, | |
1485 | struct nexthop *nexthop, | |
1486 | struct nlmsghdr *nlmsg, | |
e8d3d299 | 1487 | struct rtmsg *rtmsg, |
c52ef59f DS |
1488 | size_t req_size, |
1489 | int cmd) | |
fa713d9e | 1490 | { |
5c610faf DS |
1491 | |
1492 | if (rtmsg->rtm_family == AF_INET && | |
1493 | (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1494 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
1495 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) | |
1496 | { | |
1497 | char buf[16] = "169.254.0.1"; | |
1498 | struct in_addr ipv4_ll; | |
1499 | ||
1500 | inet_pton (AF_INET, buf, &ipv4_ll); | |
1501 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1502 | addattr_l (nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
1503 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
1504 | ||
fb5d585c | 1505 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) |
1506 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1507 | &nexthop->rmap_src.ipv4, bytelen); | |
1508 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
1509 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1510 | &nexthop->src.ipv4, bytelen); | |
1511 | ||
5c610faf DS |
1512 | if (IS_ZEBRA_DEBUG_KERNEL) |
1513 | zlog_debug(" 5549: _netlink_route_build_singlepath() (%s): " | |
1514 | "nexthop via %s if %u", | |
1515 | routedesc, buf, nexthop->ifindex); | |
1516 | return; | |
1517 | } | |
1518 | ||
e8d3d299 CF |
1519 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1520 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
5c610faf | 1521 | |
fa713d9e CF |
1522 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1523 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
1524 | { | |
1525 | addattr_l (nlmsg, req_size, RTA_GATEWAY, | |
1526 | &nexthop->gate.ipv4, bytelen); | |
c52ef59f | 1527 | |
0aabccc0 DD |
1528 | if (cmd == RTM_NEWROUTE) |
1529 | { | |
1530 | if (nexthop->rmap_src.ipv4.s_addr) | |
1531 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1532 | &nexthop->rmap_src.ipv4, bytelen); | |
1533 | else if (nexthop->src.ipv4.s_addr) | |
1534 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1535 | &nexthop->src.ipv4, bytelen); | |
1536 | } | |
fa713d9e CF |
1537 | |
1538 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1539 | zlog_debug("netlink_route_multipath() (%s): " | |
1540 | "nexthop via %s if %u", | |
1541 | routedesc, | |
1542 | inet_ntoa (nexthop->gate.ipv4), | |
1543 | nexthop->ifindex); | |
1544 | } | |
1545 | #ifdef HAVE_IPV6 | |
1546 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1547 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
1548 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1549 | { | |
1550 | addattr_l (nlmsg, req_size, RTA_GATEWAY, | |
1551 | &nexthop->gate.ipv6, bytelen); | |
1552 | ||
0aabccc0 DD |
1553 | if (cmd == RTM_NEWROUTE) |
1554 | { | |
1555 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1556 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1557 | &nexthop->rmap_src.ipv6, bytelen); | |
1558 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1559 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1560 | &nexthop->src.ipv6, bytelen); | |
1561 | } | |
1562 | ||
fa713d9e CF |
1563 | if (IS_ZEBRA_DEBUG_KERNEL) |
1564 | zlog_debug("netlink_route_multipath() (%s): " | |
1565 | "nexthop via %s if %u", | |
1566 | routedesc, | |
1567 | inet6_ntoa (nexthop->gate.ipv6), | |
1568 | nexthop->ifindex); | |
1569 | } | |
1570 | #endif /* HAVE_IPV6 */ | |
1571 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX | |
1572 | || nexthop->type == NEXTHOP_TYPE_IFNAME | |
1573 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
1574 | { | |
1575 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
1576 | ||
0aabccc0 DD |
1577 | if (cmd == RTM_NEWROUTE) |
1578 | { | |
1579 | if (nexthop->rmap_src.ipv4.s_addr) | |
1580 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1581 | &nexthop->rmap_src.ipv4, bytelen); | |
1582 | else if (nexthop->src.ipv4.s_addr) | |
1583 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1584 | &nexthop->src.ipv4, bytelen); | |
1585 | } | |
fa713d9e CF |
1586 | |
1587 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1588 | zlog_debug("netlink_route_multipath() (%s): " | |
1589 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
1590 | } | |
1591 | ||
1592 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
1593 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME) | |
1594 | { | |
1595 | addattr32 (nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
1596 | ||
0aabccc0 DD |
1597 | if (cmd == RTM_NEWROUTE) |
1598 | { | |
1599 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1600 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1601 | &nexthop->rmap_src.ipv6, bytelen); | |
1602 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1603 | addattr_l (nlmsg, req_size, RTA_PREFSRC, | |
1604 | &nexthop->src.ipv6, bytelen); | |
1605 | } | |
1606 | ||
fa713d9e CF |
1607 | if (IS_ZEBRA_DEBUG_KERNEL) |
1608 | zlog_debug("netlink_route_multipath() (%s): " | |
1609 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | /* This function takes a nexthop as argument and | |
1614 | * appends to the given rtattr/rtnexthop pair the | |
1615 | * representation of the nexthop. If the nexthop | |
1616 | * defines a preferred source, the src parameter | |
1617 | * will be modified to point to that src, otherwise | |
1618 | * it will be kept unmodified. | |
1619 | * | |
1620 | * @param routedesc: Human readable description of route type | |
1621 | * (direct/recursive, single-/multipath) | |
1622 | * @param bytelen: Length of addresses in bytes. | |
1623 | * @param nexthop: Nexthop information | |
1624 | * @param rta: rtnetlink attribute structure | |
1625 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1626 | * @param src: pointer pointing to a location where | |
1627 | * the prefsrc should be stored. | |
1628 | */ | |
1629 | static void | |
1630 | _netlink_route_build_multipath( | |
1631 | const char *routedesc, | |
1632 | int bytelen, | |
1633 | struct nexthop *nexthop, | |
1634 | struct rtattr *rta, | |
1635 | struct rtnexthop *rtnh, | |
5c610faf DS |
1636 | struct rtmsg *rtmsg, |
1637 | union g_addr **src) | |
fa713d9e CF |
1638 | { |
1639 | rtnh->rtnh_len = sizeof (*rtnh); | |
1640 | rtnh->rtnh_flags = 0; | |
1641 | rtnh->rtnh_hops = 0; | |
1642 | rta->rta_len += rtnh->rtnh_len; | |
1643 | ||
5c610faf DS |
1644 | if (rtmsg->rtm_family == AF_INET && |
1645 | (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1646 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
1647 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) | |
1648 | { | |
1649 | char buf[16] = "169.254.0.1"; | |
1650 | struct in_addr ipv4_ll; | |
1651 | ||
1652 | inet_pton (AF_INET, buf, &ipv4_ll); | |
1653 | bytelen = 4; | |
1654 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1655 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, | |
1656 | &ipv4_ll, bytelen); | |
1657 | rtnh->rtnh_len += sizeof (struct rtattr) + bytelen; | |
1658 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1659 | ||
fb5d585c | 1660 | if (nexthop->rmap_src.ipv4.s_addr) |
1661 | *src = &nexthop->rmap_src; | |
1662 | else if (nexthop->src.ipv4.s_addr) | |
1663 | *src = &nexthop->src; | |
1664 | ||
5c610faf DS |
1665 | if (IS_ZEBRA_DEBUG_KERNEL) |
1666 | zlog_debug(" 5549: netlink_route_build_multipath() (%s): " | |
1667 | "nexthop via %s if %u", | |
1668 | routedesc, buf, nexthop->ifindex); | |
1669 | return; | |
1670 | } | |
1671 | ||
1672 | ||
e8d3d299 CF |
1673 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1674 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1675 | ||
fa713d9e CF |
1676 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1677 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
1678 | { | |
1679 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, | |
1680 | &nexthop->gate.ipv4, bytelen); | |
1681 | rtnh->rtnh_len += sizeof (struct rtattr) + 4; | |
1682 | ||
c52ef59f DS |
1683 | if (nexthop->rmap_src.ipv4.s_addr) |
1684 | *src = &nexthop->rmap_src; | |
1685 | else if (nexthop->src.ipv4.s_addr) | |
1686 | *src = &nexthop->src; | |
fa713d9e CF |
1687 | |
1688 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1689 | zlog_debug("netlink_route_multipath() (%s): " | |
1690 | "nexthop via %s if %u", | |
1691 | routedesc, | |
1692 | inet_ntoa (nexthop->gate.ipv4), | |
1693 | nexthop->ifindex); | |
1694 | } | |
1695 | #ifdef HAVE_IPV6 | |
1696 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1697 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
1698 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1699 | { | |
1700 | rta_addattr_l (rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, | |
1701 | &nexthop->gate.ipv6, bytelen); | |
41fc2714 | 1702 | rtnh->rtnh_len += sizeof (struct rtattr) + bytelen; |
0aabccc0 DD |
1703 | |
1704 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1705 | *src = &nexthop->rmap_src; | |
1706 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1707 | *src = &nexthop->src; | |
1708 | ||
fa713d9e CF |
1709 | if (IS_ZEBRA_DEBUG_KERNEL) |
1710 | zlog_debug("netlink_route_multipath() (%s): " | |
1711 | "nexthop via %s if %u", | |
1712 | routedesc, | |
1713 | inet6_ntoa (nexthop->gate.ipv6), | |
1714 | nexthop->ifindex); | |
1715 | } | |
1716 | #endif /* HAVE_IPV6 */ | |
1717 | /* ifindex */ | |
1718 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
1719 | || nexthop->type == NEXTHOP_TYPE_IFINDEX | |
1720 | || nexthop->type == NEXTHOP_TYPE_IFNAME) | |
1721 | { | |
1722 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
c52ef59f DS |
1723 | |
1724 | if (nexthop->rmap_src.ipv4.s_addr) | |
1725 | *src = &nexthop->rmap_src; | |
1726 | else if (nexthop->src.ipv4.s_addr) | |
fa713d9e | 1727 | *src = &nexthop->src; |
c52ef59f | 1728 | |
fa713d9e CF |
1729 | if (IS_ZEBRA_DEBUG_KERNEL) |
1730 | zlog_debug("netlink_route_multipath() (%s): " | |
1731 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
1732 | } | |
1733 | else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFNAME | |
1734 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1735 | { | |
1736 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1737 | ||
1738 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1739 | zlog_debug("netlink_route_multipath() (%s): " | |
1740 | "nexthop via if %u", routedesc, nexthop->ifindex); | |
1741 | } | |
1742 | else | |
1743 | { | |
1744 | rtnh->rtnh_ifindex = 0; | |
1745 | } | |
1746 | } | |
1747 | ||
1748 | /* Log debug information for netlink_route_multipath | |
1749 | * if debug logging is enabled. | |
1750 | * | |
1751 | * @param cmd: Netlink command which is to be processed | |
1752 | * @param p: Prefix for which the change is due | |
1753 | * @param nexthop: Nexthop which is currently processed | |
1754 | * @param routedesc: Semantic annotation for nexthop | |
1755 | * (recursive, multipath, etc.) | |
1756 | * @param family: Address family which the change concerns | |
1757 | */ | |
1758 | static void | |
1759 | _netlink_route_debug( | |
1760 | int cmd, | |
1761 | struct prefix *p, | |
1762 | struct nexthop *nexthop, | |
1763 | const char *routedesc, | |
8f7d9fc0 FL |
1764 | int family, |
1765 | struct zebra_vrf *zvrf) | |
fa713d9e CF |
1766 | { |
1767 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1768 | { | |
8f7d9fc0 | 1769 | zlog_debug ("netlink_route_multipath() (%s): %s %s/%d vrf %u type %s", |
fa713d9e CF |
1770 | routedesc, |
1771 | lookup (nlmsg_str, cmd), | |
1772 | #ifdef HAVE_IPV6 | |
1773 | (family == AF_INET) ? inet_ntoa (p->u.prefix4) : | |
1774 | inet6_ntoa (p->u.prefix6), | |
1775 | #else | |
1776 | inet_ntoa (p->u.prefix4), | |
1777 | #endif /* HAVE_IPV6 */ | |
8f7d9fc0 | 1778 | p->prefixlen, zvrf->vrf_id, nexthop_type_to_str (nexthop->type)); |
fa713d9e CF |
1779 | } |
1780 | } | |
1781 | ||
5c610faf DS |
1782 | int |
1783 | netlink_neigh_update (int cmd, int ifindex, __u32 addr, char *lla, int llalen) | |
1784 | { | |
1785 | struct { | |
1786 | struct nlmsghdr n; | |
1787 | struct ndmsg ndm; | |
1788 | char buf[256]; | |
1789 | } req; | |
1790 | ||
8f7d9fc0 FL |
1791 | struct zebra_vrf *zvrf = vrf_info_lookup (VRF_DEFAULT); //Pending |
1792 | ||
5c610faf DS |
1793 | memset(&req.n, 0, sizeof(req.n)); |
1794 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1795 | ||
1796 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1797 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1798 | req.n.nlmsg_type = cmd; //RTM_NEWNEIGH or RTM_DELNEIGH | |
1799 | req.ndm.ndm_family = AF_INET; | |
1800 | req.ndm.ndm_state = NUD_PERMANENT; | |
1801 | req.ndm.ndm_ifindex = ifindex; | |
1802 | req.ndm.ndm_type = RTN_UNICAST; | |
1803 | ||
1804 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); | |
1805 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
1806 | ||
8f7d9fc0 | 1807 | return netlink_talk (&req.n, &zvrf->netlink_cmd, VRF_DEFAULT); |
5c610faf DS |
1808 | } |
1809 | ||
718e3744 | 1810 | /* Routing table change via netlink interface. */ |
6ae24471 | 1811 | /* Update flag indicates whether this is a "replace" or not. */ |
6072b24e | 1812 | static int |
718e3744 | 1813 | netlink_route_multipath (int cmd, struct prefix *p, struct rib *rib, |
6ae24471 | 1814 | int family, int update) |
718e3744 | 1815 | { |
1816 | int bytelen; | |
1817 | struct sockaddr_nl snl; | |
fa713d9e CF |
1818 | struct nexthop *nexthop = NULL, *tnexthop; |
1819 | int recursing; | |
1820 | int nexthop_num; | |
718e3744 | 1821 | int discard; |
fa713d9e | 1822 | const char *routedesc; |
c52ef59f DS |
1823 | int setsrc = 0; |
1824 | union g_addr src; | |
718e3744 | 1825 | |
7021c425 | 1826 | struct |
718e3744 | 1827 | { |
1828 | struct nlmsghdr n; | |
1829 | struct rtmsg r; | |
3cadc0cd | 1830 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 1831 | } req; |
1832 | ||
8f7d9fc0 FL |
1833 | struct zebra_vrf *zvrf = vrf_info_lookup (rib->vrf_id); |
1834 | ||
a4c06dec | 1835 | memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE); |
718e3744 | 1836 | |
1837 | bytelen = (family == AF_INET ? 4 : 16); | |
1838 | ||
1839 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct rtmsg)); | |
1840 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
6ae24471 DS |
1841 | if ((cmd == RTM_NEWROUTE) && update) |
1842 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
718e3744 | 1843 | req.n.nlmsg_type = cmd; |
1844 | req.r.rtm_family = family; | |
1845 | req.r.rtm_table = rib->table; | |
1846 | req.r.rtm_dst_len = p->prefixlen; | |
40da2216 TT |
1847 | req.r.rtm_protocol = RTPROT_ZEBRA; |
1848 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
718e3744 | 1849 | |
7021c425 | 1850 | if ((rib->flags & ZEBRA_FLAG_BLACKHOLE) || (rib->flags & ZEBRA_FLAG_REJECT)) |
718e3744 | 1851 | discard = 1; |
1852 | else | |
1853 | discard = 0; | |
1854 | ||
7021c425 | 1855 | if (cmd == RTM_NEWROUTE) |
718e3744 | 1856 | { |
7021c425 | 1857 | if (discard) |
595db7f1 | 1858 | { |
1859 | if (rib->flags & ZEBRA_FLAG_BLACKHOLE) | |
1860 | req.r.rtm_type = RTN_BLACKHOLE; | |
1861 | else if (rib->flags & ZEBRA_FLAG_REJECT) | |
1862 | req.r.rtm_type = RTN_UNREACHABLE; | |
7021c425 | 1863 | else |
1864 | assert (RTN_BLACKHOLE != RTN_UNREACHABLE); /* false */ | |
1865 | } | |
595db7f1 | 1866 | else |
7021c425 | 1867 | req.r.rtm_type = RTN_UNICAST; |
718e3744 | 1868 | } |
1869 | ||
1870 | addattr_l (&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); | |
1871 | ||
1872 | /* Metric. */ | |
1f5705f0 DS |
1873 | /* Hardcode the metric for all routes coming from zebra. Metric isn't used |
1874 | * either by the kernel or by zebra. Its purely for calculating best path(s) | |
1875 | * by the routing protocol and for communicating with protocol peers. | |
1876 | */ | |
1877 | addattr32 (&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
718e3744 | 1878 | |
1879 | if (discard) | |
1880 | { | |
1881 | if (cmd == RTM_NEWROUTE) | |
fa713d9e CF |
1882 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
1883 | { | |
1884 | /* We shouldn't encounter recursive nexthops on discard routes, | |
1885 | * but it is probably better to handle that case correctly anyway. | |
1886 | */ | |
1887 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1888 | continue; | |
1889 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1890 | } | |
718e3744 | 1891 | goto skip; |
1892 | } | |
1893 | ||
fa713d9e CF |
1894 | /* Count overall nexthops so we can decide whether to use singlepath |
1895 | * or multipath case. */ | |
1896 | nexthop_num = 0; | |
1897 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
1898 | { | |
1899 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1900 | continue; | |
1901 | if (cmd == RTM_NEWROUTE && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1902 | continue; | |
1903 | if (cmd == RTM_DELROUTE && !CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1904 | continue; | |
1905 | ||
1906 | nexthop_num++; | |
1907 | } | |
1908 | ||
1909 | /* Singlepath case. */ | |
1910 | if (nexthop_num == 1 || MULTIPATH_NUM == 1) | |
718e3744 | 1911 | { |
fa713d9e CF |
1912 | nexthop_num = 0; |
1913 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) | |
7021c425 | 1914 | { |
fa713d9e | 1915 | if (CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
c52ef59f | 1916 | { |
c52ef59f DS |
1917 | if (!setsrc) |
1918 | { | |
0aabccc0 DD |
1919 | if (family == AF_INET) |
1920 | { | |
1921 | if (nexthop->rmap_src.ipv4.s_addr != 0) | |
1922 | { | |
1923 | src.ipv4 = nexthop->rmap_src.ipv4; | |
1924 | setsrc = 1; | |
1925 | } | |
1926 | else if (nexthop->src.ipv4.s_addr != 0) | |
1927 | { | |
1928 | src.ipv4 = nexthop->src.ipv4; | |
1929 | setsrc = 1; | |
1930 | } | |
1931 | } | |
1932 | else if (family == AF_INET6) | |
1933 | { | |
1934 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1935 | { | |
1936 | src.ipv6 = nexthop->rmap_src.ipv6; | |
1937 | setsrc = 1; | |
1938 | } | |
1939 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1940 | { | |
1941 | src.ipv6 = nexthop->src.ipv6; | |
1942 | setsrc = 1; | |
1943 | } | |
1944 | } | |
c52ef59f DS |
1945 | } |
1946 | continue; | |
1947 | } | |
7021c425 | 1948 | |
1949 | if ((cmd == RTM_NEWROUTE | |
1950 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1951 | || (cmd == RTM_DELROUTE | |
1952 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) | |
1953 | { | |
fa713d9e | 1954 | routedesc = recursing ? "recursive, 1 hop" : "single hop"; |
7021c425 | 1955 | |
8f7d9fc0 | 1956 | _netlink_route_debug(cmd, p, nexthop, routedesc, family, zvrf); |
fa713d9e | 1957 | _netlink_route_build_singlepath(routedesc, bytelen, |
e8d3d299 | 1958 | nexthop, &req.n, &req.r, |
c52ef59f | 1959 | sizeof req, cmd); |
7021c425 | 1960 | |
1961 | if (cmd == RTM_NEWROUTE) | |
1962 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
1963 | ||
1964 | nexthop_num++; | |
1965 | break; | |
1966 | } | |
1967 | } | |
c52ef59f | 1968 | if (setsrc && (cmd == RTM_NEWROUTE)) |
0aabccc0 DD |
1969 | { |
1970 | if (family == AF_INET) | |
1971 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv4, bytelen); | |
1972 | else if (family == AF_INET6) | |
1973 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv6, bytelen); | |
1974 | } | |
718e3744 | 1975 | } |
1976 | else | |
1977 | { | |
3cadc0cd | 1978 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 1979 | struct rtattr *rta = (void *) buf; |
1980 | struct rtnexthop *rtnh; | |
c52ef59f | 1981 | union g_addr *src1 = NULL; |
718e3744 | 1982 | |
1983 | rta->rta_type = RTA_MULTIPATH; | |
7021c425 | 1984 | rta->rta_len = RTA_LENGTH (0); |
1985 | rtnh = RTA_DATA (rta); | |
718e3744 | 1986 | |
1987 | nexthop_num = 0; | |
fa713d9e | 1988 | for (ALL_NEXTHOPS_RO(rib->nexthop, nexthop, tnexthop, recursing)) |
7021c425 | 1989 | { |
fa713d9e CF |
1990 | if (MULTIPATH_NUM != 0 && nexthop_num >= MULTIPATH_NUM) |
1991 | break; | |
1992 | ||
1993 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
c52ef59f DS |
1994 | { |
1995 | /* This only works for IPv4 now */ | |
1996 | if (!setsrc) | |
1997 | { | |
0aabccc0 DD |
1998 | if (family == AF_INET) |
1999 | { | |
2000 | if (nexthop->rmap_src.ipv4.s_addr != 0) | |
2001 | { | |
2002 | src.ipv4 = nexthop->rmap_src.ipv4; | |
2003 | setsrc = 1; | |
2004 | } | |
2005 | else if (nexthop->src.ipv4.s_addr != 0) | |
2006 | { | |
2007 | src.ipv4 = nexthop->src.ipv4; | |
2008 | setsrc = 1; | |
2009 | } | |
2010 | } | |
2011 | else if (family == AF_INET6) | |
2012 | { | |
2013 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
2014 | { | |
2015 | src.ipv6 = nexthop->rmap_src.ipv6; | |
2016 | setsrc = 1; | |
2017 | } | |
2018 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
2019 | { | |
2020 | src.ipv6 = nexthop->src.ipv6; | |
2021 | setsrc = 1; | |
2022 | } | |
2023 | } | |
c52ef59f DS |
2024 | } |
2025 | continue; | |
2026 | } | |
fa713d9e | 2027 | |
7021c425 | 2028 | if ((cmd == RTM_NEWROUTE |
2029 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2030 | || (cmd == RTM_DELROUTE | |
2031 | && CHECK_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB))) | |
2032 | { | |
fa713d9e | 2033 | routedesc = recursing ? "recursive, multihop" : "multihop"; |
7021c425 | 2034 | nexthop_num++; |
2035 | ||
fa713d9e | 2036 | _netlink_route_debug(cmd, p, nexthop, |
8f7d9fc0 | 2037 | routedesc, family, zvrf); |
fa713d9e | 2038 | _netlink_route_build_multipath(routedesc, bytelen, |
5c610faf | 2039 | nexthop, rta, rtnh, &req.r, &src1); |
7021c425 | 2040 | rtnh = RTNH_NEXT (rtnh); |
2041 | ||
2042 | if (cmd == RTM_NEWROUTE) | |
2043 | SET_FLAG (nexthop->flags, NEXTHOP_FLAG_FIB); | |
c52ef59f DS |
2044 | |
2045 | if (!setsrc && src1) | |
2046 | { | |
0aabccc0 DD |
2047 | if (family == AF_INET) |
2048 | src.ipv4 = src1->ipv4; | |
2049 | else if (family == AF_INET6) | |
2050 | src.ipv6 = src1->ipv6; | |
2051 | ||
c52ef59f DS |
2052 | setsrc = 1; |
2053 | } | |
7021c425 | 2054 | } |
2055 | } | |
c52ef59f | 2056 | if (setsrc && (cmd == RTM_NEWROUTE)) |
0aabccc0 DD |
2057 | { |
2058 | if (family == AF_INET) | |
2059 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv4, bytelen); | |
2060 | else if (family == AF_INET6) | |
2061 | addattr_l (&req.n, sizeof req, RTA_PREFSRC, &src.ipv6, bytelen); | |
2062 | zlog_debug("Setting source"); | |
2063 | } | |
718e3744 | 2064 | |
2065 | if (rta->rta_len > RTA_LENGTH (0)) | |
3cadc0cd | 2066 | addattr_l (&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, RTA_DATA (rta), |
7021c425 | 2067 | RTA_PAYLOAD (rta)); |
718e3744 | 2068 | } |
2069 | ||
2070 | /* If there is no useful nexthop then return. */ | |
2071 | if (nexthop_num == 0) | |
2072 | { | |
2073 | if (IS_ZEBRA_DEBUG_KERNEL) | |
b6178002 | 2074 | zlog_debug ("netlink_route_multipath(): No useful nexthop."); |
718e3744 | 2075 | return 0; |
2076 | } | |
2077 | ||
7021c425 | 2078 | skip: |
718e3744 | 2079 | |
2080 | /* Destination netlink address. */ | |
2081 | memset (&snl, 0, sizeof snl); | |
2082 | snl.nl_family = AF_NETLINK; | |
2083 | ||
718e3744 | 2084 | /* Talk to netlink socket. */ |
8f7d9fc0 | 2085 | return netlink_talk (&req.n, &zvrf->netlink_cmd, zvrf); |
718e3744 | 2086 | } |
2087 | ||
2088 | int | |
2089 | kernel_add_ipv4 (struct prefix *p, struct rib *rib) | |
2090 | { | |
6ae24471 DS |
2091 | return netlink_route_multipath (RTM_NEWROUTE, p, rib, AF_INET, 0); |
2092 | } | |
2093 | ||
2094 | int | |
2095 | kernel_update_ipv4 (struct prefix *p, struct rib *rib) | |
2096 | { | |
2097 | return netlink_route_multipath (RTM_NEWROUTE, p, rib, AF_INET, 1); | |
718e3744 | 2098 | } |
2099 | ||
2100 | int | |
2101 | kernel_delete_ipv4 (struct prefix *p, struct rib *rib) | |
2102 | { | |
6ae24471 | 2103 | return netlink_route_multipath (RTM_DELROUTE, p, rib, AF_INET, 0); |
718e3744 | 2104 | } |
2105 | ||
2106 | #ifdef HAVE_IPV6 | |
2107 | int | |
2108 | kernel_add_ipv6 (struct prefix *p, struct rib *rib) | |
2109 | { | |
c3c0ac83 | 2110 | { |
6ae24471 | 2111 | return netlink_route_multipath (RTM_NEWROUTE, p, rib, AF_INET6, 0); |
c3c0ac83 | 2112 | } |
718e3744 | 2113 | } |
2114 | ||
2115 | int | |
2116 | kernel_delete_ipv6 (struct prefix *p, struct rib *rib) | |
2117 | { | |
c3c0ac83 | 2118 | { |
6ae24471 | 2119 | return netlink_route_multipath (RTM_DELROUTE, p, rib, AF_INET6, 0); |
c3c0ac83 | 2120 | } |
718e3744 | 2121 | } |
2122 | ||
2123 | /* Delete IPv6 route from the kernel. */ | |
2124 | int | |
2125 | kernel_delete_ipv6_old (struct prefix_ipv6 *dest, struct in6_addr *gate, | |
6621ca86 | 2126 | unsigned int index, int flags, int table) |
718e3744 | 2127 | { |
7021c425 | 2128 | return netlink_route (RTM_DELROUTE, AF_INET6, &dest->prefix, |
2129 | dest->prefixlen, gate, index, flags, table); | |
718e3744 | 2130 | } |
2131 | #endif /* HAVE_IPV6 */ | |
6b0655a2 | 2132 | |
718e3744 | 2133 | /* Interface address modification. */ |
6072b24e | 2134 | static int |
718e3744 | 2135 | netlink_address (int cmd, int family, struct interface *ifp, |
7021c425 | 2136 | struct connected *ifc) |
718e3744 | 2137 | { |
2138 | int bytelen; | |
2139 | struct prefix *p; | |
2140 | ||
7021c425 | 2141 | struct |
718e3744 | 2142 | { |
2143 | struct nlmsghdr n; | |
2144 | struct ifaddrmsg ifa; | |
3cadc0cd | 2145 | char buf[NL_PKT_BUF_SIZE]; |
718e3744 | 2146 | } req; |
2147 | ||
8f7d9fc0 FL |
2148 | struct zebra_vrf *zvrf = vrf_info_lookup (ifp->vrf_id); |
2149 | ||
718e3744 | 2150 | p = ifc->address; |
a4c06dec | 2151 | memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE); |
718e3744 | 2152 | |
2153 | bytelen = (family == AF_INET ? 4 : 16); | |
2154 | ||
7021c425 | 2155 | req.n.nlmsg_len = NLMSG_LENGTH (sizeof (struct ifaddrmsg)); |
718e3744 | 2156 | req.n.nlmsg_flags = NLM_F_REQUEST; |
2157 | req.n.nlmsg_type = cmd; | |
2158 | req.ifa.ifa_family = family; | |
2159 | ||
2160 | req.ifa.ifa_index = ifp->ifindex; | |
2161 | req.ifa.ifa_prefixlen = p->prefixlen; | |
2162 | ||
2163 | addattr_l (&req.n, sizeof req, IFA_LOCAL, &p->u.prefix, bytelen); | |
2164 | ||
2165 | if (family == AF_INET && cmd == RTM_NEWADDR) | |
2166 | { | |
e4529636 | 2167 | if (!CONNECTED_PEER(ifc) && ifc->destination) |
7021c425 | 2168 | { |
2169 | p = ifc->destination; | |
2170 | addattr_l (&req.n, sizeof req, IFA_BROADCAST, &p->u.prefix, | |
2171 | bytelen); | |
2172 | } | |
718e3744 | 2173 | } |
2174 | ||
2175 | if (CHECK_FLAG (ifc->flags, ZEBRA_IFA_SECONDARY)) | |
2176 | SET_FLAG (req.ifa.ifa_flags, IFA_F_SECONDARY); | |
7021c425 | 2177 | |
718e3744 | 2178 | if (ifc->label) |
2179 | addattr_l (&req.n, sizeof req, IFA_LABEL, ifc->label, | |
7021c425 | 2180 | strlen (ifc->label) + 1); |
718e3744 | 2181 | |
8f7d9fc0 | 2182 | return netlink_talk (&req.n, &zvrf->netlink_cmd, zvrf); |
718e3744 | 2183 | } |
2184 | ||
2185 | int | |
2186 | kernel_address_add_ipv4 (struct interface *ifp, struct connected *ifc) | |
2187 | { | |
2188 | return netlink_address (RTM_NEWADDR, AF_INET, ifp, ifc); | |
2189 | } | |
2190 | ||
2191 | int | |
2192 | kernel_address_delete_ipv4 (struct interface *ifp, struct connected *ifc) | |
2193 | { | |
2194 | return netlink_address (RTM_DELADDR, AF_INET, ifp, ifc); | |
2195 | } | |
2196 | ||
718e3744 | 2197 | |
2198 | extern struct thread_master *master; | |
2199 | ||
2200 | /* Kernel route reflection. */ | |
6072b24e | 2201 | static int |
718e3744 | 2202 | kernel_read (struct thread *thread) |
2203 | { | |
8f7d9fc0 FL |
2204 | struct zebra_vrf *zvrf = (struct zebra_vrf *)THREAD_ARG (thread); |
2205 | netlink_parse_info (netlink_information_fetch, &zvrf->netlink, zvrf); | |
2206 | zvrf->t_netlink = thread_add_read (zebrad.master, kernel_read, zvrf, | |
2207 | zvrf->netlink.sock); | |
718e3744 | 2208 | |
2209 | return 0; | |
2210 | } | |
2211 | ||
3d265b4d SH |
2212 | /* Filter out messages from self that occur on listener socket, |
2213 | caused by our actions on the command socket | |
2214 | */ | |
2215 | static void netlink_install_filter (int sock, __u32 pid) | |
768a27ea | 2216 | { |
768a27ea | 2217 | struct sock_filter filter[] = { |
3d265b4d SH |
2218 | /* 0: ldh [4] */ |
2219 | BPF_STMT(BPF_LD|BPF_ABS|BPF_H, offsetof(struct nlmsghdr, nlmsg_type)), | |
2220 | /* 1: jeq 0x18 jt 3 jf 6 */ | |
2221 | BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, htons(RTM_NEWROUTE), 1, 0), | |
2222 | /* 2: jeq 0x19 jt 3 jf 6 */ | |
2223 | BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, htons(RTM_DELROUTE), 0, 3), | |
2224 | /* 3: ldw [12] */ | |
2225 | BPF_STMT(BPF_LD|BPF_ABS|BPF_W, offsetof(struct nlmsghdr, nlmsg_pid)), | |
2226 | /* 4: jeq XX jt 5 jf 6 */ | |
2227 | BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, htonl(pid), 0, 1), | |
2228 | /* 5: ret 0 (skip) */ | |
2229 | BPF_STMT(BPF_RET|BPF_K, 0), | |
2230 | /* 6: ret 0xffff (keep) */ | |
2231 | BPF_STMT(BPF_RET|BPF_K, 0xffff), | |
768a27ea PJ |
2232 | }; |
2233 | ||
2234 | struct sock_fprog prog = { | |
837d16cc | 2235 | .len = array_size(filter), |
768a27ea PJ |
2236 | .filter = filter, |
2237 | }; | |
2238 | ||
2239 | if (setsockopt(sock, SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)) < 0) | |
2240 | zlog_warn ("Can't install socket filter: %s\n", safe_strerror(errno)); | |
2241 | } | |
2242 | ||
718e3744 | 2243 | /* Exported interface function. This function simply calls |
2244 | netlink_socket (). */ | |
2245 | void | |
8f7d9fc0 | 2246 | kernel_init (struct zebra_vrf *zvrf) |
718e3744 | 2247 | { |
2248 | unsigned long groups; | |
2249 | ||
7021c425 | 2250 | groups = RTMGRP_LINK | RTMGRP_IPV4_ROUTE | RTMGRP_IPV4_IFADDR; |
718e3744 | 2251 | #ifdef HAVE_IPV6 |
7021c425 | 2252 | groups |= RTMGRP_IPV6_ROUTE | RTMGRP_IPV6_IFADDR; |
718e3744 | 2253 | #endif /* HAVE_IPV6 */ |
8f7d9fc0 FL |
2254 | netlink_socket (&zvrf->netlink, groups, zvrf->vrf_id); |
2255 | netlink_socket (&zvrf->netlink_cmd, 0, zvrf->vrf_id); | |
718e3744 | 2256 | |
2257 | /* Register kernel socket. */ | |
8f7d9fc0 | 2258 | if (zvrf->netlink.sock > 0) |
768a27ea | 2259 | { |
4cde931e | 2260 | /* Only want non-blocking on the netlink event socket */ |
8f7d9fc0 FL |
2261 | if (fcntl (zvrf->netlink.sock, F_SETFL, O_NONBLOCK) < 0) |
2262 | zlog_err ("Can't set %s socket flags: %s", zvrf->netlink.name, | |
2263 | safe_strerror (errno)); | |
4cde931e | 2264 | |
30afea3b SH |
2265 | /* Set receive buffer size if it's set from command line */ |
2266 | if (nl_rcvbufsize) | |
8f7d9fc0 | 2267 | netlink_recvbuf (&zvrf->netlink, nl_rcvbufsize); |
30afea3b | 2268 | |
8f7d9fc0 FL |
2269 | netlink_install_filter (zvrf->netlink.sock, zvrf->netlink_cmd.snl.nl_pid); |
2270 | zvrf->t_netlink = thread_add_read (zebrad.master, kernel_read, zvrf, | |
2271 | zvrf->netlink.sock); | |
2272 | } | |
2273 | } | |
2274 | ||
2275 | void | |
2276 | kernel_terminate (struct zebra_vrf *zvrf) | |
2277 | { | |
2278 | THREAD_READ_OFF (zvrf->t_netlink); | |
2279 | ||
2280 | if (zvrf->netlink.sock >= 0) | |
2281 | { | |
2282 | close (zvrf->netlink.sock); | |
2283 | zvrf->netlink.sock = -1; | |
2284 | } | |
2285 | ||
2286 | if (zvrf->netlink_cmd.sock >= 0) | |
2287 | { | |
2288 | close (zvrf->netlink_cmd.sock); | |
2289 | zvrf->netlink_cmd.sock = -1; | |
768a27ea | 2290 | } |
718e3744 | 2291 | } |
78deec45 AS |
2292 | |
2293 | /* | |
2294 | * nl_msg_type_to_str | |
2295 | */ | |
2296 | const char * | |
2297 | nl_msg_type_to_str (uint16_t msg_type) | |
2298 | { | |
2299 | return lookup (nlmsg_str, msg_type); | |
2300 | } | |
2301 | ||
2302 | /* | |
2303 | * nl_rtproto_to_str | |
2304 | */ | |
2305 | const char * | |
2306 | nl_rtproto_to_str (u_char rtproto) | |
2307 | { | |
2308 | return lookup (rtproto_str, rtproto); | |
2309 | } |