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Commit | Line | Data |
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718e3744 | 1 | /* Kernel communication using routing socket. |
2 | * Copyright (C) 1999 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 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifndef HAVE_NETLINK | |
24 | ||
8ccc7e80 | 25 | #include <net/if_types.h> |
fe6c7157 | 26 | #ifdef __OpenBSD__ |
d3e2c74a RW |
27 | #include <netmpls/mpls.h> |
28 | #endif | |
718e3744 | 29 | |
30 | #include "if.h" | |
31 | #include "prefix.h" | |
32 | #include "sockunion.h" | |
33 | #include "connected.h" | |
34 | #include "memory.h" | |
4a1ab8e4 | 35 | #include "zebra_memory.h" |
718e3744 | 36 | #include "ioctl.h" |
37 | #include "log.h" | |
718e3744 | 38 | #include "table.h" |
39 | #include "rib.h" | |
edd7c245 | 40 | #include "privs.h" |
78104b9b | 41 | #include "vrf.h" |
174482ef | 42 | #include "lib_errors.h" |
718e3744 | 43 | |
a37bd5e0 | 44 | #include "zebra/rt.h" |
718e3744 | 45 | #include "zebra/interface.h" |
3801e764 | 46 | #include "zebra/zebra_router.h" |
718e3744 | 47 | #include "zebra/debug.h" |
ec1a4283 | 48 | #include "zebra/kernel_socket.h" |
8f7d9fc0 | 49 | #include "zebra/rib.h" |
98c15db6 | 50 | #include "zebra/zebra_errors.h" |
01ce7cba | 51 | #include "zebra/zebra_ptm.h" |
718e3744 | 52 | |
edd7c245 | 53 | extern struct zebra_privs_t zserv_privs; |
54 | ||
4bfbea8c | 55 | /* |
cfa0ed09 GT |
56 | * Historically, the BSD routing socket has aligned data following a |
57 | * struct sockaddr to sizeof(long), which was 4 bytes on some | |
58 | * platforms, and 8 bytes on others. NetBSD 6 changed the routing | |
59 | * socket to align to sizeof(uint64_t), which is 8 bytes. OS X | |
60 | * appears to align to sizeof(int), which is 4 bytes. | |
4bfbea8c | 61 | * |
cfa0ed09 GT |
62 | * Alignment of zero-sized sockaddrs is nonsensical, but historically |
63 | * BSD defines RT_ROUNDUP(0) to be the alignment interval (rather than | |
64 | * 0). We follow this practice without questioning it, but it is a | |
65 | * bug if quagga calls ROUNDUP with 0. | |
4bfbea8c | 66 | */ |
cb800e35 RZ |
67 | #ifdef __APPLE__ |
68 | #define ROUNDUP_TYPE int | |
69 | #else | |
70 | #define ROUNDUP_TYPE long | |
71 | #endif | |
cfa0ed09 GT |
72 | |
73 | /* | |
74 | * Because of these varying conventions, the only sane approach is for | |
75 | * the <net/route.h> header to define some flavor of ROUNDUP macro. | |
76 | */ | |
e7f0e649 | 77 | |
cb800e35 | 78 | /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */ |
cfa0ed09 GT |
79 | #if defined(RT_ROUNDUP) |
80 | #define ROUNDUP(a) RT_ROUNDUP(a) | |
81 | #endif /* defined(RT_ROUNDUP) */ | |
82 | ||
83 | /* | |
84 | * If ROUNDUP has not yet been defined in terms of platform-provided | |
85 | * defines, attempt to cope with heuristics. | |
86 | */ | |
87 | #if !defined(ROUNDUP) | |
88 | ||
89 | /* | |
adf580f7 DL |
90 | * If you're porting to a platform that changed RT_ROUNDUP but doesn't |
91 | * have it in its headers, this will break rather obviously and you'll | |
92 | * have to fix it here. | |
cfa0ed09 | 93 | */ |
d62a17ae | 94 | #define ROUNDUP(a) \ |
95 | ((a) > 0 ? (1 + (((a)-1) | (sizeof(ROUNDUP_TYPE) - 1))) \ | |
96 | : sizeof(ROUNDUP_TYPE)) | |
cfa0ed09 GT |
97 | |
98 | #endif /* defined(ROUNDUP) */ | |
99 | ||
cb800e35 RZ |
100 | |
101 | #if defined(SA_SIZE) | |
102 | /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */ | |
103 | #define SAROUNDUP(a) SA_SIZE(a) | |
104 | #else /* !SA_SIZE */ | |
4bfbea8c | 105 | /* |
106 | * Given a pointer (sockaddr or void *), return the number of bytes | |
107 | * taken up by the sockaddr and any padding needed for alignment. | |
108 | */ | |
6f0e3f6e | 109 | #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN) |
4bfbea8c | 110 | #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len) |
56c1f7d8 | 111 | #else |
4bfbea8c | 112 | /* |
113 | * One would hope all fixed-size structure definitions are aligned, | |
114 | * but round them up nonetheless. | |
115 | */ | |
d62a17ae | 116 | #define SAROUNDUP(X) \ |
117 | (((struct sockaddr *)(X))->sa_family == AF_INET \ | |
118 | ? ROUNDUP(sizeof(struct sockaddr_in)) \ | |
119 | : (((struct sockaddr *)(X))->sa_family == AF_INET6 \ | |
120 | ? ROUNDUP(sizeof(struct sockaddr_in6)) \ | |
121 | : (((struct sockaddr *)(X))->sa_family == AF_LINK \ | |
122 | ? ROUNDUP(sizeof(struct sockaddr_dl)) \ | |
123 | : sizeof(struct sockaddr)))) | |
6f0e3f6e | 124 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ |
718e3744 | 125 | |
e7f0e649 DL |
126 | #endif /* !SA_SIZE */ |
127 | ||
718e3744 | 128 | /* Routing socket message types. */ |
d62a17ae | 129 | const struct message rtm_type_str[] = {{RTM_ADD, "RTM_ADD"}, |
130 | {RTM_DELETE, "RTM_DELETE"}, | |
131 | {RTM_CHANGE, "RTM_CHANGE"}, | |
132 | {RTM_GET, "RTM_GET"}, | |
133 | {RTM_LOSING, "RTM_LOSING"}, | |
134 | {RTM_REDIRECT, "RTM_REDIRECT"}, | |
135 | {RTM_MISS, "RTM_MISS"}, | |
7f7651eb | 136 | #ifdef RTM_LOCK |
d62a17ae | 137 | {RTM_LOCK, "RTM_LOCK"}, |
7f7651eb | 138 | #endif /* RTM_LOCK */ |
9458b819 | 139 | #ifdef OLDADD |
d62a17ae | 140 | {RTM_OLDADD, "RTM_OLDADD"}, |
9458b819 GT |
141 | #endif /* RTM_OLDADD */ |
142 | #ifdef RTM_OLDDEL | |
d62a17ae | 143 | {RTM_OLDDEL, "RTM_OLDDEL"}, |
9458b819 | 144 | #endif /* RTM_OLDDEL */ |
5f11807b | 145 | #ifdef RTM_RESOLVE |
d62a17ae | 146 | {RTM_RESOLVE, "RTM_RESOLVE"}, |
5f11807b | 147 | #endif /* RTM_RESOLVE */ |
d62a17ae | 148 | {RTM_NEWADDR, "RTM_NEWADDR"}, |
149 | {RTM_DELADDR, "RTM_DELADDR"}, | |
150 | {RTM_IFINFO, "RTM_IFINFO"}, | |
718e3744 | 151 | #ifdef RTM_OIFINFO |
d62a17ae | 152 | {RTM_OIFINFO, "RTM_OIFINFO"}, |
718e3744 | 153 | #endif /* RTM_OIFINFO */ |
154 | #ifdef RTM_NEWMADDR | |
d62a17ae | 155 | {RTM_NEWMADDR, "RTM_NEWMADDR"}, |
718e3744 | 156 | #endif /* RTM_NEWMADDR */ |
157 | #ifdef RTM_DELMADDR | |
d62a17ae | 158 | {RTM_DELMADDR, "RTM_DELMADDR"}, |
718e3744 | 159 | #endif /* RTM_DELMADDR */ |
160 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 161 | {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, |
718e3744 | 162 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 163 | {0}}; |
164 | ||
165 | static const struct message rtm_flag_str[] = {{RTF_UP, "UP"}, | |
166 | {RTF_GATEWAY, "GATEWAY"}, | |
167 | {RTF_HOST, "HOST"}, | |
168 | {RTF_REJECT, "REJECT"}, | |
169 | {RTF_DYNAMIC, "DYNAMIC"}, | |
170 | {RTF_MODIFIED, "MODIFIED"}, | |
171 | {RTF_DONE, "DONE"}, | |
718e3744 | 172 | #ifdef RTF_MASK |
d62a17ae | 173 | {RTF_MASK, "MASK"}, |
718e3744 | 174 | #endif /* RTF_MASK */ |
e6f148e6 | 175 | #ifdef RTF_CLONING |
d62a17ae | 176 | {RTF_CLONING, "CLONING"}, |
e6f148e6 | 177 | #endif /* RTF_CLONING */ |
23b1f400 | 178 | #ifdef RTF_XRESOLVE |
d62a17ae | 179 | {RTF_XRESOLVE, "XRESOLVE"}, |
23b1f400 | 180 | #endif /* RTF_XRESOLVE */ |
c54632ec | 181 | #ifdef RTF_LLINFO |
d62a17ae | 182 | {RTF_LLINFO, "LLINFO"}, |
c54632ec | 183 | #endif /* RTF_LLINFO */ |
d62a17ae | 184 | {RTF_STATIC, "STATIC"}, |
185 | {RTF_BLACKHOLE, "BLACKHOLE"}, | |
6fe70d1b | 186 | #ifdef RTF_PRIVATE |
d62a17ae | 187 | {RTF_PRIVATE, "PRIVATE"}, |
6fe70d1b | 188 | #endif /* RTF_PRIVATE */ |
d62a17ae | 189 | {RTF_PROTO1, "PROTO1"}, |
190 | {RTF_PROTO2, "PROTO2"}, | |
718e3744 | 191 | #ifdef RTF_PRCLONING |
d62a17ae | 192 | {RTF_PRCLONING, "PRCLONING"}, |
718e3744 | 193 | #endif /* RTF_PRCLONING */ |
194 | #ifdef RTF_WASCLONED | |
d62a17ae | 195 | {RTF_WASCLONED, "WASCLONED"}, |
718e3744 | 196 | #endif /* RTF_WASCLONED */ |
197 | #ifdef RTF_PROTO3 | |
d62a17ae | 198 | {RTF_PROTO3, "PROTO3"}, |
718e3744 | 199 | #endif /* RTF_PROTO3 */ |
200 | #ifdef RTF_PINNED | |
d62a17ae | 201 | {RTF_PINNED, "PINNED"}, |
718e3744 | 202 | #endif /* RTF_PINNED */ |
203 | #ifdef RTF_LOCAL | |
d62a17ae | 204 | {RTF_LOCAL, "LOCAL"}, |
718e3744 | 205 | #endif /* RTF_LOCAL */ |
206 | #ifdef RTF_BROADCAST | |
d62a17ae | 207 | {RTF_BROADCAST, "BROADCAST"}, |
718e3744 | 208 | #endif /* RTF_BROADCAST */ |
209 | #ifdef RTF_MULTICAST | |
d62a17ae | 210 | {RTF_MULTICAST, "MULTICAST"}, |
718e3744 | 211 | #endif /* RTF_MULTICAST */ |
6fe70d1b | 212 | #ifdef RTF_MULTIRT |
d62a17ae | 213 | {RTF_MULTIRT, "MULTIRT"}, |
6fe70d1b | 214 | #endif /* RTF_MULTIRT */ |
215 | #ifdef RTF_SETSRC | |
d62a17ae | 216 | {RTF_SETSRC, "SETSRC"}, |
6fe70d1b | 217 | #endif /* RTF_SETSRC */ |
d62a17ae | 218 | {0}}; |
718e3744 | 219 | |
220 | /* Kernel routing update socket. */ | |
221 | int routing_sock = -1; | |
222 | ||
80776aec MS |
223 | /* Kernel dataplane routing update socket, used in the dataplane pthread |
224 | * context. | |
225 | */ | |
226 | int dplane_routing_sock = -1; | |
227 | ||
718e3744 | 228 | /* Yes I'm checking ugly routing socket behavior. */ |
229 | /* #define DEBUG */ | |
230 | ||
19fb538d | 231 | size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf); |
86c57af5 | 232 | size_t rta_get(caddr_t sap, void *dest, size_t destlen); |
19fb538d | 233 | size_t rta_getattr(caddr_t sap, void *destp, size_t destlen); |
86c57af5 | 234 | size_t rta_getsdlname(caddr_t sap, void *dest, short *destlen); |
5b62211d | 235 | const char *rtatostr(unsigned int flags, char *buf, size_t buflen); |
86c57af5 | 236 | |
718e3744 | 237 | /* Supported address family check. */ |
d62a17ae | 238 | static inline int af_check(int family) |
718e3744 | 239 | { |
d62a17ae | 240 | if (family == AF_INET) |
241 | return 1; | |
242 | if (family == AF_INET6) | |
243 | return 1; | |
244 | return 0; | |
718e3744 | 245 | } |
6b0655a2 | 246 | |
19fb538d | 247 | size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf) |
86c57af5 RZ |
248 | { |
249 | struct sockaddr *sa = (struct sockaddr *)sap; | |
75e710df | 250 | struct sockaddr_dl *sdl; |
86c57af5 RZ |
251 | uint8_t *dest = destp; |
252 | size_t tlen, copylen; | |
253 | ||
254 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
255 | copylen = sa->sa_len; | |
256 | tlen = (copylen == 0) ? sizeof(ROUNDUP_TYPE) : ROUNDUP(copylen); | |
257 | #else /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
258 | copylen = tlen = SAROUNDUP(sap); | |
259 | #endif /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
260 | ||
19fb538d RZ |
261 | if (copylen > 0 && dest != NULL) { |
262 | if (checkaf && af_check(sa->sa_family) == 0) | |
263 | return tlen; | |
75e710df RZ |
264 | /* |
265 | * Handle sockaddr_dl corner case: | |
266 | * RTA_NETMASK might be AF_LINK, but it doesn't anything | |
267 | * relevant (e.g. zeroed out fields). Check for this | |
268 | * case and avoid warning log message. | |
269 | */ | |
270 | if (sa->sa_family == AF_LINK) { | |
271 | sdl = (struct sockaddr_dl *)sa; | |
272 | if (sdl->sdl_index == 0 || sdl->sdl_nlen == 0) | |
e0f741f4 | 273 | copylen = destlen; |
75e710df | 274 | } |
19fb538d | 275 | |
86c57af5 | 276 | if (copylen > destlen) { |
fa0069c6 DS |
277 | zlog_warn( |
278 | "%s: destination buffer too small (%zu vs %zu)", | |
279 | __func__, copylen, destlen); | |
86c57af5 RZ |
280 | memcpy(dest, sap, destlen); |
281 | } else | |
282 | memcpy(dest, sap, copylen); | |
283 | } | |
284 | ||
285 | return tlen; | |
286 | } | |
287 | ||
19fb538d RZ |
288 | size_t rta_get(caddr_t sap, void *destp, size_t destlen) |
289 | { | |
290 | return _rta_get(sap, destp, destlen, true); | |
291 | } | |
292 | ||
293 | size_t rta_getattr(caddr_t sap, void *destp, size_t destlen) | |
294 | { | |
295 | return _rta_get(sap, destp, destlen, false); | |
296 | } | |
297 | ||
86c57af5 RZ |
298 | size_t rta_getsdlname(caddr_t sap, void *destp, short *destlen) |
299 | { | |
300 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)sap; | |
86c57af5 RZ |
301 | uint8_t *dest = destp; |
302 | size_t tlen, copylen; | |
303 | ||
304 | copylen = sdl->sdl_nlen; | |
305 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
8054cf97 QY |
306 | struct sockaddr *sa = (struct sockaddr *)sap; |
307 | ||
86c57af5 RZ |
308 | tlen = (sa->sa_len == 0) ? sizeof(ROUNDUP_TYPE) : ROUNDUP(sa->sa_len); |
309 | #else /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
310 | tlen = SAROUNDUP(sap); | |
311 | #endif /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
312 | ||
313 | if (copylen > 0 && dest != NULL && sdl->sdl_family == AF_LINK) { | |
314 | if (copylen > IFNAMSIZ) { | |
fa0069c6 DS |
315 | zlog_warn( |
316 | "%s: destination buffer too small (%zu vs %d)", | |
317 | __func__, copylen, IFNAMSIZ); | |
86c57af5 RZ |
318 | memcpy(dest, sdl->sdl_data, IFNAMSIZ); |
319 | dest[IFNAMSIZ] = 0; | |
320 | *destlen = IFNAMSIZ; | |
321 | } else { | |
322 | memcpy(dest, sdl->sdl_data, copylen); | |
323 | dest[copylen] = 0; | |
324 | *destlen = copylen; | |
325 | } | |
326 | } else | |
327 | *destlen = 0; | |
328 | ||
329 | return tlen; | |
330 | } | |
331 | ||
5b62211d RZ |
332 | const char *rtatostr(unsigned int flags, char *buf, size_t buflen) |
333 | { | |
334 | const char *flagstr, *bufstart; | |
335 | int bit, wlen; | |
336 | char ustr[32]; | |
337 | ||
338 | /* Hold the pointer to the buffer beginning. */ | |
339 | bufstart = buf; | |
340 | ||
341 | for (bit = 1; bit; bit <<= 1) { | |
342 | if ((flags & bit) == 0) | |
343 | continue; | |
344 | ||
345 | switch (bit) { | |
346 | case RTA_DST: | |
347 | flagstr = "DST"; | |
348 | break; | |
349 | case RTA_GATEWAY: | |
350 | flagstr = "GATEWAY"; | |
351 | break; | |
352 | case RTA_NETMASK: | |
353 | flagstr = "NETMASK"; | |
354 | break; | |
355 | #ifdef RTA_GENMASK | |
356 | case RTA_GENMASK: | |
357 | flagstr = "GENMASK"; | |
358 | break; | |
359 | #endif /* RTA_GENMASK */ | |
360 | case RTA_IFP: | |
361 | flagstr = "IFP"; | |
362 | break; | |
363 | case RTA_IFA: | |
364 | flagstr = "IFA"; | |
365 | break; | |
366 | #ifdef RTA_AUTHOR | |
367 | case RTA_AUTHOR: | |
368 | flagstr = "AUTHOR"; | |
369 | break; | |
370 | #endif /* RTA_AUTHOR */ | |
371 | case RTA_BRD: | |
372 | flagstr = "BRD"; | |
373 | break; | |
374 | #ifdef RTA_SRC | |
375 | case RTA_SRC: | |
376 | flagstr = "SRC"; | |
377 | break; | |
378 | #endif /* RTA_SRC */ | |
379 | #ifdef RTA_SRCMASK | |
380 | case RTA_SRCMASK: | |
381 | flagstr = "SRCMASK"; | |
382 | break; | |
383 | #endif /* RTA_SRCMASK */ | |
384 | #ifdef RTA_LABEL | |
385 | case RTA_LABEL: | |
386 | flagstr = "LABEL"; | |
387 | break; | |
388 | #endif /* RTA_LABEL */ | |
389 | ||
390 | default: | |
391 | snprintf(ustr, sizeof(ustr), "0x%x", bit); | |
392 | flagstr = ustr; | |
393 | break; | |
394 | } | |
395 | ||
396 | wlen = snprintf(buf, buflen, "%s,", flagstr); | |
397 | buf += wlen; | |
398 | buflen -= wlen; | |
399 | } | |
400 | ||
401 | /* Check for empty buffer. */ | |
402 | if (bufstart != buf) | |
403 | buf--; | |
404 | ||
405 | /* Remove the last comma. */ | |
406 | *buf = 0; | |
407 | ||
408 | return bufstart; | |
409 | } | |
410 | ||
718e3744 | 411 | /* Dump routing table flag for debug purpose. */ |
d62a17ae | 412 | static void rtm_flag_dump(int flag) |
718e3744 | 413 | { |
d62a17ae | 414 | const struct message *mes; |
415 | static char buf[BUFSIZ]; | |
416 | ||
417 | buf[0] = '\0'; | |
418 | for (mes = rtm_flag_str; mes->key != 0; mes++) { | |
419 | if (mes->key & flag) { | |
420 | strlcat(buf, mes->str, BUFSIZ); | |
421 | strlcat(buf, " ", BUFSIZ); | |
422 | } | |
718e3744 | 423 | } |
d62a17ae | 424 | zlog_debug("Kernel: %s", buf); |
718e3744 | 425 | } |
426 | ||
427 | #ifdef RTM_IFANNOUNCE | |
428 | /* Interface adding function */ | |
d62a17ae | 429 | static int ifan_read(struct if_announcemsghdr *ifan) |
718e3744 | 430 | { |
d62a17ae | 431 | struct interface *ifp; |
432 | ||
433 | ifp = if_lookup_by_index(ifan->ifan_index, VRF_DEFAULT); | |
434 | ||
435 | if (ifp) | |
436 | assert((ifp->ifindex == ifan->ifan_index) | |
437 | || (ifp->ifindex == IFINDEX_INTERNAL)); | |
438 | ||
9d303b37 DL |
439 | if ((ifp == NULL) || ((ifp->ifindex == IFINDEX_INTERNAL) |
440 | && (ifan->ifan_what == IFAN_ARRIVAL))) { | |
d62a17ae | 441 | if (IS_ZEBRA_DEBUG_KERNEL) |
442 | zlog_debug( | |
443 | "%s: creating interface for ifindex %d, name %s", | |
444 | __func__, ifan->ifan_index, ifan->ifan_name); | |
445 | ||
446 | /* Create Interface */ | |
a36898e7 | 447 | ifp = if_get_by_name(ifan->ifan_name, VRF_DEFAULT); |
ff880b78 | 448 | if_set_index(ifp, ifan->ifan_index); |
d62a17ae | 449 | |
450 | if_get_metric(ifp); | |
451 | if_add_update(ifp); | |
452 | } else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) | |
453 | if_delete_update(ifp); | |
454 | ||
455 | if_get_flags(ifp); | |
456 | if_get_mtu(ifp); | |
457 | if_get_metric(ifp); | |
458 | ||
459 | if (IS_ZEBRA_DEBUG_KERNEL) | |
460 | zlog_debug("%s: interface %s index %d", __func__, | |
461 | ifan->ifan_name, ifan->ifan_index); | |
462 | ||
463 | return 0; | |
718e3744 | 464 | } |
465 | #endif /* RTM_IFANNOUNCE */ | |
466 | ||
9234b382 | 467 | #ifdef HAVE_BSD_IFI_LINK_STATE |
c543a173 | 468 | /* BSD link detect translation */ |
d62a17ae | 469 | static void bsd_linkdetect_translate(struct if_msghdr *ifm) |
c543a173 | 470 | { |
d62a17ae | 471 | if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) |
472 | || (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) | |
473 | SET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
474 | else | |
475 | UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
c543a173 | 476 | } |
9234b382 | 477 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 478 | |
d62a17ae | 479 | static enum zebra_link_type sdl_to_zebra_link_type(unsigned int sdlt) |
8ccc7e80 | 480 | { |
d62a17ae | 481 | switch (sdlt) { |
482 | case IFT_ETHER: | |
483 | return ZEBRA_LLT_ETHER; | |
484 | case IFT_X25: | |
485 | return ZEBRA_LLT_X25; | |
486 | case IFT_FDDI: | |
487 | return ZEBRA_LLT_FDDI; | |
488 | case IFT_PPP: | |
489 | return ZEBRA_LLT_PPP; | |
490 | case IFT_LOOP: | |
491 | return ZEBRA_LLT_LOOPBACK; | |
492 | case IFT_SLIP: | |
493 | return ZEBRA_LLT_SLIP; | |
494 | case IFT_ARCNET: | |
495 | return ZEBRA_LLT_ARCNET; | |
496 | case IFT_ATM: | |
497 | return ZEBRA_LLT_ATM; | |
498 | case IFT_LOCALTALK: | |
499 | return ZEBRA_LLT_LOCALTLK; | |
500 | case IFT_HIPPI: | |
501 | return ZEBRA_LLT_HIPPI; | |
8ccc7e80 | 502 | #ifdef IFT_IEEE1394 |
d62a17ae | 503 | case IFT_IEEE1394: |
504 | return ZEBRA_LLT_IEEE1394; | |
8ccc7e80 TT |
505 | #endif |
506 | ||
d62a17ae | 507 | default: |
508 | return ZEBRA_LLT_UNKNOWN; | |
509 | } | |
8ccc7e80 TT |
510 | } |
511 | ||
da26e3b6 | 512 | /* |
513 | * Handle struct if_msghdr obtained from reading routing socket or | |
514 | * sysctl (from interface_list). There may or may not be sockaddrs | |
515 | * present after the header. | |
516 | */ | |
d62a17ae | 517 | int ifm_read(struct if_msghdr *ifm) |
718e3744 | 518 | { |
d62a17ae | 519 | struct interface *ifp = NULL; |
ee74220b | 520 | struct sockaddr_dl *sdl = NULL; |
d62a17ae | 521 | char ifname[IFNAMSIZ]; |
522 | short ifnlen = 0; | |
86c57af5 | 523 | int maskbit; |
d62a17ae | 524 | caddr_t cp; |
5b62211d | 525 | char fbuf[64]; |
d62a17ae | 526 | |
527 | /* terminate ifname at head (for strnlen) and tail (for safety) */ | |
528 | ifname[IFNAMSIZ - 1] = '\0'; | |
529 | ||
530 | /* paranoia: sanity check structure */ | |
531 | if (ifm->ifm_msglen < sizeof(struct if_msghdr)) { | |
e914ccbe | 532 | flog_err(EC_ZEBRA_NETLINK_LENGTH_ERROR, |
1c50c1c0 QY |
533 | "ifm_read: ifm->ifm_msglen %d too short\n", |
534 | ifm->ifm_msglen); | |
d62a17ae | 535 | return -1; |
536 | } | |
537 | ||
538 | /* | |
539 | * Check for a sockaddr_dl following the message. First, point to | |
540 | * where a socakddr might be if one follows the message. | |
541 | */ | |
542 | cp = (void *)(ifm + 1); | |
718e3744 | 543 | |
86c57af5 RZ |
544 | /* Look up for RTA_IFP and skip others. */ |
545 | for (maskbit = 1; maskbit; maskbit <<= 1) { | |
546 | if ((maskbit & ifm->ifm_addrs) == 0) | |
547 | continue; | |
548 | if (maskbit != RTA_IFP) { | |
549 | cp += rta_get(cp, NULL, 0); | |
550 | continue; | |
551 | } | |
552 | ||
553 | /* Save the pointer to the structure. */ | |
554 | sdl = (struct sockaddr_dl *)cp; | |
555 | cp += rta_getsdlname(cp, ifname, &ifnlen); | |
556 | } | |
d62a17ae | 557 | |
558 | if (IS_ZEBRA_DEBUG_KERNEL) | |
5b62211d RZ |
559 | zlog_debug("%s: sdl ifname %s addrs {%s}", __func__, |
560 | (ifnlen ? ifname : "(nil)"), | |
561 | rtatostr(ifm->ifm_addrs, fbuf, sizeof(fbuf))); | |
d62a17ae | 562 | |
563 | /* | |
564 | * Look up on ifindex first, because ifindices are the primary handle | |
565 | * for | |
566 | * interfaces across the user/kernel boundary, for most systems. (Some | |
567 | * messages, such as up/down status changes on NetBSD, do not include a | |
568 | * sockaddr_dl). | |
569 | */ | |
570 | if ((ifp = if_lookup_by_index(ifm->ifm_index, VRF_DEFAULT)) != NULL) { | |
571 | /* we have an ifp, verify that the name matches as some systems, | |
572 | * eg Solaris, have a 1:many association of ifindex:ifname | |
573 | * if they dont match, we dont have the correct ifp and should | |
574 | * set it back to NULL to let next check do lookup by name | |
575 | */ | |
576 | if (ifnlen && (strncmp(ifp->name, ifname, IFNAMSIZ) != 0)) { | |
577 | if (IS_ZEBRA_DEBUG_KERNEL) | |
578 | zlog_debug( | |
0437e105 | 579 | "%s: ifp name %s doesn't match sdl name %s", |
d62a17ae | 580 | __func__, ifp->name, ifname); |
581 | ifp = NULL; | |
582 | } | |
da26e3b6 | 583 | } |
5c78b3d0 | 584 | |
d62a17ae | 585 | /* |
586 | * If we dont have an ifp, try looking up by name. Particularly as some | |
587 | * systems (Solaris) have a 1:many mapping of ifindex:ifname - the | |
588 | * ifname | |
589 | * is therefore our unique handle to that interface. | |
590 | * | |
591 | * Interfaces specified in the configuration file for which the ifindex | |
592 | * has not been determined will have ifindex == IFINDEX_INTERNAL, and | |
593 | * such | |
594 | * interfaces are found by this search, and then their ifindex values | |
595 | * can | |
596 | * be filled in. | |
597 | */ | |
598 | if ((ifp == NULL) && ifnlen) | |
a36898e7 | 599 | ifp = if_lookup_by_name(ifname, VRF_DEFAULT); |
d62a17ae | 600 | |
601 | /* | |
602 | * If ifp still does not exist or has an invalid index | |
603 | * (IFINDEX_INTERNAL), | |
604 | * create or fill in an interface. | |
605 | */ | |
606 | if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) { | |
607 | /* | |
608 | * To create or fill in an interface, a sockaddr_dl (via | |
609 | * RTA_IFP) is required. | |
610 | */ | |
611 | if (!ifnlen) { | |
9165c5f5 | 612 | zlog_debug("Interface index %d (new) missing ifname", |
9df414fe | 613 | ifm->ifm_index); |
d62a17ae | 614 | return -1; |
615 | } | |
616 | ||
5c78b3d0 | 617 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 618 | /* Down->Down interface should be ignored here. |
619 | * See further comment below. | |
620 | */ | |
621 | if (!CHECK_FLAG(ifm->ifm_flags, IFF_UP)) | |
622 | return 0; | |
5c78b3d0 | 623 | #endif /* !RTM_IFANNOUNCE */ |
d62a17ae | 624 | |
625 | if (ifp == NULL) { | |
626 | /* Interface that zebra was not previously aware of, so | |
627 | * create. */ | |
d5c65bf1 | 628 | ifp = if_create_name(ifname, VRF_DEFAULT); |
d62a17ae | 629 | if (IS_ZEBRA_DEBUG_KERNEL) |
630 | zlog_debug("%s: creating ifp for ifindex %d", | |
631 | __func__, ifm->ifm_index); | |
632 | } | |
633 | ||
634 | if (IS_ZEBRA_DEBUG_KERNEL) | |
635 | zlog_debug( | |
636 | "%s: updated/created ifp, ifname %s, ifindex %d", | |
637 | __func__, ifp->name, ifp->ifindex); | |
638 | /* | |
639 | * Fill in newly created interface structure, or larval | |
640 | * structure with ifindex IFINDEX_INTERNAL. | |
641 | */ | |
ff880b78 | 642 | if_set_index(ifp, ifm->ifm_index); |
d62a17ae | 643 | |
9234b382 | 644 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 645 | bsd_linkdetect_translate(ifm); |
9234b382 | 646 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 647 | |
d62a17ae | 648 | if_flags_update(ifp, ifm->ifm_flags); |
718e3744 | 649 | #if defined(__bsdi__) |
d62a17ae | 650 | if_kvm_get_mtu(ifp); |
718e3744 | 651 | #else |
d62a17ae | 652 | if_get_mtu(ifp); |
718e3744 | 653 | #endif /* __bsdi__ */ |
d62a17ae | 654 | if_get_metric(ifp); |
655 | ||
656 | /* | |
657 | * XXX sockaddr_dl contents can be larger than the structure | |
658 | * definition. There are 2 big families here: | |
659 | * - BSD has sdl_len + sdl_data[16] + overruns sdl_data | |
660 | * we MUST use sdl_len here or we'll truncate data. | |
661 | * - Solaris has no sdl_len, but sdl_data[244] | |
662 | * presumably, it's not going to run past that, so sizeof() | |
663 | * is fine here. | |
86c57af5 | 664 | * a nonzero ifnlen from rta_getsdlname() means sdl is valid |
d62a17ae | 665 | */ |
666 | ifp->ll_type = ZEBRA_LLT_UNKNOWN; | |
667 | ifp->hw_addr_len = 0; | |
668 | if (ifnlen) { | |
ca3ccd87 | 669 | #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN |
d62a17ae | 670 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
671 | sdl->sdl_len); | |
ca3ccd87 | 672 | #else |
d62a17ae | 673 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
674 | sizeof(struct sockaddr_dl)); | |
ca3ccd87 | 675 | #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */ |
8ccc7e80 | 676 | |
d62a17ae | 677 | ifp->ll_type = sdl_to_zebra_link_type(sdl->sdl_type); |
678 | if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) { | |
679 | memcpy(ifp->hw_addr, LLADDR(sdl), | |
680 | sdl->sdl_alen); | |
681 | ifp->hw_addr_len = sdl->sdl_alen; | |
682 | } | |
683 | } | |
684 | ||
685 | if_add_update(ifp); | |
686 | } else | |
687 | /* | |
688 | * Interface structure exists. Adjust stored flags from | |
689 | * notification. If interface has up->down or down->up | |
690 | * transition, call state change routines (to adjust routes, | |
691 | * notify routing daemons, etc.). (Other flag changes are stored | |
692 | * but apparently do not trigger action.) | |
693 | */ | |
694 | { | |
695 | if (ifp->ifindex != ifm->ifm_index) { | |
9df414fe | 696 | zlog_debug( |
3efd0893 | 697 | "%s: index mismatch, ifname %s, ifp index %d, ifm index %d", |
d62a17ae | 698 | __func__, ifp->name, ifp->ifindex, |
699 | ifm->ifm_index); | |
700 | return -1; | |
701 | } | |
702 | ||
9234b382 | 703 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 704 | bsd_linkdetect_translate(ifm); |
9234b382 | 705 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 706 | |
d62a17ae | 707 | /* update flags and handle operative->inoperative transition, if |
708 | * any */ | |
709 | if_flags_update(ifp, ifm->ifm_flags); | |
710 | ||
6eb8827d | 711 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 712 | if (!if_is_up(ifp)) { |
713 | /* No RTM_IFANNOUNCE on this platform, so we can never | |
714 | * distinguish between ~IFF_UP and delete. We must | |
715 | * presume | |
716 | * it has been deleted. | |
717 | * Eg, Solaris will not notify us of unplumb. | |
718 | * | |
719 | * XXX: Fixme - this should be runtime detected | |
720 | * So that a binary compiled on a system with IFANNOUNCE | |
721 | * will still behave correctly if run on a platform | |
722 | * without | |
723 | */ | |
724 | if_delete_update(ifp); | |
725 | } | |
6eb8827d | 726 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 727 | if (if_is_up(ifp)) { |
1ba27564 | 728 | #if defined(__bsdi__) |
d62a17ae | 729 | if_kvm_get_mtu(ifp); |
1ba27564 | 730 | #else |
d62a17ae | 731 | if_get_mtu(ifp); |
1ba27564 | 732 | #endif /* __bsdi__ */ |
d62a17ae | 733 | if_get_metric(ifp); |
734 | } | |
735 | } | |
5c78b3d0 | 736 | |
718e3744 | 737 | #ifdef HAVE_NET_RT_IFLIST |
d62a17ae | 738 | ifp->stats = ifm->ifm_data; |
718e3744 | 739 | #endif /* HAVE_NET_RT_IFLIST */ |
04427fcb | 740 | ifp->speed = ifm->ifm_data.ifi_baudrate / 1000000; |
718e3744 | 741 | |
d62a17ae | 742 | if (IS_ZEBRA_DEBUG_KERNEL) |
743 | zlog_debug("%s: interface %s index %d", __func__, ifp->name, | |
744 | ifp->ifindex); | |
718e3744 | 745 | |
d62a17ae | 746 | return 0; |
718e3744 | 747 | } |
6b0655a2 | 748 | |
718e3744 | 749 | /* Address read from struct ifa_msghdr. */ |
d62a17ae | 750 | static void ifam_read_mesg(struct ifa_msghdr *ifm, union sockunion *addr, |
751 | union sockunion *mask, union sockunion *brd, | |
752 | char *ifname, short *ifnlen) | |
718e3744 | 753 | { |
d62a17ae | 754 | caddr_t pnt, end; |
755 | union sockunion dst; | |
756 | union sockunion gateway; | |
86c57af5 | 757 | int maskbit; |
5b62211d | 758 | char fbuf[64]; |
d62a17ae | 759 | |
760 | pnt = (caddr_t)(ifm + 1); | |
761 | end = ((caddr_t)ifm) + ifm->ifam_msglen; | |
762 | ||
763 | /* Be sure structure is cleared */ | |
764 | memset(mask, 0, sizeof(union sockunion)); | |
765 | memset(addr, 0, sizeof(union sockunion)); | |
766 | memset(brd, 0, sizeof(union sockunion)); | |
767 | memset(&dst, 0, sizeof(union sockunion)); | |
768 | memset(&gateway, 0, sizeof(union sockunion)); | |
769 | ||
770 | /* We fetch each socket variable into sockunion. */ | |
86c57af5 RZ |
771 | for (maskbit = 1; maskbit; maskbit <<= 1) { |
772 | if ((maskbit & ifm->ifam_addrs) == 0) | |
773 | continue; | |
774 | ||
775 | switch (maskbit) { | |
776 | case RTA_DST: | |
777 | pnt += rta_get(pnt, &dst, sizeof(dst)); | |
778 | break; | |
779 | case RTA_GATEWAY: | |
780 | pnt += rta_get(pnt, &gateway, sizeof(gateway)); | |
781 | break; | |
782 | case RTA_NETMASK: | |
19fb538d | 783 | pnt += rta_getattr(pnt, mask, sizeof(*mask)); |
86c57af5 RZ |
784 | break; |
785 | case RTA_IFP: | |
786 | pnt += rta_getsdlname(pnt, ifname, ifnlen); | |
787 | break; | |
788 | case RTA_IFA: | |
789 | pnt += rta_get(pnt, addr, sizeof(*addr)); | |
790 | break; | |
791 | case RTA_BRD: | |
792 | pnt += rta_get(pnt, brd, sizeof(*brd)); | |
793 | break; | |
794 | ||
795 | default: | |
796 | pnt += rta_get(pnt, NULL, 0); | |
797 | break; | |
798 | } | |
799 | ||
800 | if (pnt > end) { | |
801 | zlog_warn("%s: overflow detected (pnt:%p end:%p)", | |
802 | __func__, pnt, end); | |
803 | break; | |
804 | } | |
805 | } | |
d62a17ae | 806 | |
807 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
7053cae4 | 808 | switch (sockunion_family(addr)) { |
d62a17ae | 809 | case AF_INET: |
810 | case AF_INET6: { | |
811 | char buf[4][INET6_ADDRSTRLEN]; | |
7053cae4 RZ |
812 | int masklen = |
813 | (sockunion_family(addr) == AF_INET) | |
814 | ? ip_masklen(mask->sin.sin_addr) | |
815 | : ip6_masklen(mask->sin6.sin6_addr); | |
d62a17ae | 816 | zlog_debug( |
3efd0893 | 817 | "%s: ifindex %d, ifname %s, ifam_addrs {%s}, ifam_flags 0x%x, addr %s/%d broad %s dst %s gateway %s", |
d62a17ae | 818 | __func__, ifm->ifam_index, |
5b62211d RZ |
819 | (ifnlen ? ifname : "(nil)"), |
820 | rtatostr(ifm->ifam_addrs, fbuf, sizeof(fbuf)), | |
d62a17ae | 821 | ifm->ifam_flags, |
7053cae4 RZ |
822 | sockunion2str(addr, buf[0], sizeof(buf[0])), |
823 | masklen, | |
824 | sockunion2str(brd, buf[1], sizeof(buf[1])), | |
825 | sockunion2str(&dst, buf[2], sizeof(buf[2])), | |
826 | sockunion2str(&gateway, buf[2], | |
827 | sizeof(buf[2]))); | |
d62a17ae | 828 | } break; |
829 | default: | |
5b62211d | 830 | zlog_debug("%s: ifindex %d, ifname %s, ifam_addrs {%s}", |
d62a17ae | 831 | __func__, ifm->ifam_index, |
832 | (ifnlen ? ifname : "(nil)"), | |
5b62211d RZ |
833 | rtatostr(ifm->ifam_addrs, fbuf, |
834 | sizeof(fbuf))); | |
d62a17ae | 835 | break; |
836 | } | |
837 | } | |
838 | ||
839 | /* Assert read up end point matches to end point */ | |
86c57af5 | 840 | pnt = (caddr_t)ROUNDUP((size_t)pnt); |
2d100aa5 | 841 | if (pnt != (caddr_t)ROUNDUP((size_t)end)) |
9df414fe | 842 | zlog_debug("ifam_read() doesn't read all socket data"); |
718e3744 | 843 | } |
844 | ||
845 | /* Interface's address information get. */ | |
d62a17ae | 846 | int ifam_read(struct ifa_msghdr *ifam) |
718e3744 | 847 | { |
d62a17ae | 848 | struct interface *ifp = NULL; |
849 | union sockunion addr, mask, brd; | |
8c36640b | 850 | bool dest_same = false; |
d62a17ae | 851 | char ifname[INTERFACE_NAMSIZ]; |
852 | short ifnlen = 0; | |
853 | char isalias = 0; | |
854 | int flags = 0; | |
855 | ||
856 | ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; | |
857 | ||
858 | /* Allocate and read address information. */ | |
859 | ifam_read_mesg(ifam, &addr, &mask, &brd, ifname, &ifnlen); | |
860 | ||
861 | if ((ifp = if_lookup_by_index(ifam->ifam_index, VRF_DEFAULT)) == NULL) { | |
e914ccbe | 862 | flog_warn(EC_ZEBRA_UNKNOWN_INTERFACE, |
9df414fe | 863 | "%s: no interface for ifname %s, index %d", __func__, |
d62a17ae | 864 | ifname, ifam->ifam_index); |
865 | return -1; | |
866 | } | |
867 | ||
868 | if (ifnlen && strncmp(ifp->name, ifname, INTERFACE_NAMSIZ)) | |
869 | isalias = 1; | |
870 | ||
871 | /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD | |
872 | field contains a broadcast address or a peer address, so we are | |
873 | forced to | |
874 | rely upon the interface type. */ | |
875 | if (if_is_pointopoint(ifp)) | |
876 | SET_FLAG(flags, ZEBRA_IFA_PEER); | |
8c36640b DS |
877 | else { |
878 | if (memcmp(&addr, &brd, sizeof(addr)) == 0) | |
879 | dest_same = true; | |
880 | } | |
7ab62c53 | 881 | |
6502208c PJ |
882 | #if 0 |
883 | /* it might seem cute to grab the interface metric here, however | |
884 | * we're processing an address update message, and so some systems | |
885 | * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left | |
886 | * in deliberately, as comment. | |
887 | */ | |
d34b8991 | 888 | ifp->metric = ifam->ifam_metric; |
6502208c PJ |
889 | #endif |
890 | ||
d62a17ae | 891 | /* Add connected address. */ |
892 | switch (sockunion_family(&addr)) { | |
893 | case AF_INET: | |
894 | if (ifam->ifam_type == RTM_NEWADDR) | |
895 | connected_add_ipv4(ifp, flags, &addr.sin.sin_addr, | |
896 | ip_masklen(mask.sin.sin_addr), | |
8c36640b | 897 | dest_same ? NULL : &brd.sin.sin_addr, |
cde1af84 AK |
898 | (isalias ? ifname : NULL), |
899 | METRIC_MAX); | |
d62a17ae | 900 | else |
901 | connected_delete_ipv4(ifp, flags, &addr.sin.sin_addr, | |
902 | ip_masklen(mask.sin.sin_addr), | |
8c36640b DS |
903 | dest_same ? NULL |
904 | : &brd.sin.sin_addr); | |
d62a17ae | 905 | break; |
906 | case AF_INET6: | |
907 | /* Unset interface index from link-local address when IPv6 stack | |
908 | is KAME. */ | |
909 | if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6.sin6_addr)) { | |
910 | SET_IN6_LINKLOCAL_IFINDEX(addr.sin6.sin6_addr, 0); | |
911 | } | |
912 | ||
913 | if (ifam->ifam_type == RTM_NEWADDR) | |
914 | connected_add_ipv6(ifp, flags, &addr.sin6.sin6_addr, | |
60c0687a | 915 | NULL, |
d62a17ae | 916 | ip6_masklen(mask.sin6.sin6_addr), |
cde1af84 AK |
917 | (isalias ? ifname : NULL), |
918 | METRIC_MAX); | |
d62a17ae | 919 | else |
60c0687a | 920 | connected_delete_ipv6(ifp, &addr.sin6.sin6_addr, NULL, |
608105a7 | 921 | ip6_masklen(mask.sin6.sin6_addr)); |
d62a17ae | 922 | break; |
923 | default: | |
924 | /* Unsupported family silently ignore... */ | |
925 | break; | |
926 | } | |
927 | ||
928 | /* Check interface flag for implicit up of the interface. */ | |
929 | if_refresh(ifp); | |
5c78b3d0 | 930 | |
d62a17ae | 931 | return 0; |
718e3744 | 932 | } |
6b0655a2 | 933 | |
718e3744 | 934 | /* Interface function for reading kernel routing table information. */ |
d62a17ae | 935 | static int rtm_read_mesg(struct rt_msghdr *rtm, union sockunion *dest, |
936 | union sockunion *mask, union sockunion *gate, | |
937 | char *ifname, short *ifnlen) | |
718e3744 | 938 | { |
d62a17ae | 939 | caddr_t pnt, end; |
86c57af5 | 940 | int maskbit; |
d62a17ae | 941 | |
942 | /* Pnt points out socket data start point. */ | |
943 | pnt = (caddr_t)(rtm + 1); | |
944 | end = ((caddr_t)rtm) + rtm->rtm_msglen; | |
945 | ||
946 | /* rt_msghdr version check. */ | |
947 | if (rtm->rtm_version != RTM_VERSION) | |
e914ccbe | 948 | flog_warn(EC_ZEBRA_RTM_VERSION_MISMATCH, |
3efd0893 | 949 | "Routing message version different %d should be %d.This may cause problem\n", |
9df414fe | 950 | rtm->rtm_version, RTM_VERSION); |
d62a17ae | 951 | |
952 | /* Be sure structure is cleared */ | |
953 | memset(dest, 0, sizeof(union sockunion)); | |
954 | memset(gate, 0, sizeof(union sockunion)); | |
955 | memset(mask, 0, sizeof(union sockunion)); | |
956 | ||
957 | /* We fetch each socket variable into sockunion. */ | |
86c57af5 RZ |
958 | /* We fetch each socket variable into sockunion. */ |
959 | for (maskbit = 1; maskbit; maskbit <<= 1) { | |
960 | if ((maskbit & rtm->rtm_addrs) == 0) | |
961 | continue; | |
962 | ||
963 | switch (maskbit) { | |
964 | case RTA_DST: | |
965 | pnt += rta_get(pnt, dest, sizeof(*dest)); | |
966 | break; | |
967 | case RTA_GATEWAY: | |
968 | pnt += rta_get(pnt, gate, sizeof(*gate)); | |
969 | break; | |
970 | case RTA_NETMASK: | |
1583f8f5 | 971 | pnt += rta_getattr(pnt, mask, sizeof(*mask)); |
86c57af5 RZ |
972 | break; |
973 | case RTA_IFP: | |
974 | pnt += rta_getsdlname(pnt, ifname, ifnlen); | |
975 | break; | |
976 | ||
977 | default: | |
978 | pnt += rta_get(pnt, NULL, 0); | |
979 | break; | |
980 | } | |
981 | ||
982 | if (pnt > end) { | |
983 | zlog_warn("%s: overflow detected (pnt:%p end:%p)", | |
984 | __func__, pnt, end); | |
985 | break; | |
986 | } | |
987 | } | |
d62a17ae | 988 | |
989 | /* If there is netmask information set it's family same as | |
990 | destination family*/ | |
991 | if (rtm->rtm_addrs & RTA_NETMASK) | |
992 | mask->sa.sa_family = dest->sa.sa_family; | |
993 | ||
994 | /* Assert read up to the end of pointer. */ | |
995 | if (pnt != end) | |
9df414fe | 996 | zlog_debug("rtm_read() doesn't read all socket data."); |
d62a17ae | 997 | |
998 | return rtm->rtm_flags; | |
718e3744 | 999 | } |
1000 | ||
d62a17ae | 1001 | void rtm_read(struct rt_msghdr *rtm) |
718e3744 | 1002 | { |
d62a17ae | 1003 | int flags; |
acde7f6b | 1004 | uint32_t zebra_flags; |
d62a17ae | 1005 | union sockunion dest, mask, gate; |
1006 | char ifname[INTERFACE_NAMSIZ + 1]; | |
1007 | short ifnlen = 0; | |
fd36be7e | 1008 | struct nexthop nh; |
026745a2 DS |
1009 | struct prefix p; |
1010 | ifindex_t ifindex = 0; | |
1011 | afi_t afi; | |
5b62211d | 1012 | char fbuf[64]; |
d62a17ae | 1013 | |
1014 | zebra_flags = 0; | |
1015 | ||
1016 | /* Read destination and netmask and gateway from rtm message | |
1017 | structure. */ | |
1018 | flags = rtm_read_mesg(rtm, &dest, &mask, &gate, ifname, &ifnlen); | |
1019 | if (!(flags & RTF_DONE)) | |
1020 | return; | |
1021 | if (IS_ZEBRA_DEBUG_KERNEL) | |
5b62211d | 1022 | zlog_debug("%s: got rtm of type %d (%s) addrs {%s}", __func__, |
d62a17ae | 1023 | rtm->rtm_type, |
5b62211d RZ |
1024 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL), |
1025 | rtatostr(rtm->rtm_addrs, fbuf, sizeof(fbuf))); | |
d62a17ae | 1026 | |
1027 | #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ | |
1028 | if (flags & RTF_CLONED) | |
1029 | return; | |
718e3744 | 1030 | #endif |
d62a17ae | 1031 | #ifdef RTF_WASCLONED /*freebsd*/ |
1032 | if (flags & RTF_WASCLONED) | |
1033 | return; | |
718e3744 | 1034 | #endif |
1035 | ||
d62a17ae | 1036 | if ((rtm->rtm_type == RTM_ADD || rtm->rtm_type == RTM_CHANGE) |
1037 | && !(flags & RTF_UP)) | |
1038 | return; | |
1039 | ||
1040 | /* This is connected route. */ | |
1041 | if (!(flags & RTF_GATEWAY)) | |
1042 | return; | |
1043 | ||
1044 | if (flags & RTF_PROTO1) | |
1045 | SET_FLAG(zebra_flags, ZEBRA_FLAG_SELFROUTE); | |
1046 | ||
a8309422 | 1047 | memset(&nh, 0, sizeof(nh)); |
4a7371e9 DS |
1048 | |
1049 | nh.vrf_id = VRF_DEFAULT; | |
d62a17ae | 1050 | /* This is a reject or blackhole route */ |
a8309422 DL |
1051 | if (flags & RTF_REJECT) { |
1052 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
1053 | nh.bh_type = BLACKHOLE_REJECT; | |
1054 | } else if (flags & RTF_BLACKHOLE) { | |
1055 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
1056 | nh.bh_type = BLACKHOLE_NULL; | |
1057 | } | |
d62a17ae | 1058 | |
c626d369 DS |
1059 | /* |
1060 | * Ignore our own messages. | |
1061 | */ | |
1062 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) | |
1063 | return; | |
d62a17ae | 1064 | |
d62a17ae | 1065 | if (dest.sa.sa_family == AF_INET) { |
026745a2 | 1066 | afi = AFI_IP; |
d62a17ae | 1067 | p.family = AF_INET; |
1068 | p.u.prefix4 = dest.sin.sin_addr; | |
1069 | if (flags & RTF_HOST) | |
1070 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
1071 | else | |
1072 | p.prefixlen = ip_masklen(mask.sin.sin_addr); | |
1073 | ||
a8309422 DL |
1074 | if (!nh.type) { |
1075 | nh.type = NEXTHOP_TYPE_IPV4; | |
1076 | nh.gate.ipv4 = gate.sin.sin_addr; | |
1077 | } | |
026745a2 DS |
1078 | } else if (dest.sa.sa_family == AF_INET6) { |
1079 | afi = AFI_IP6; | |
d62a17ae | 1080 | p.family = AF_INET6; |
1081 | p.u.prefix6 = dest.sin6.sin6_addr; | |
1082 | if (flags & RTF_HOST) | |
1083 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1084 | else | |
1085 | p.prefixlen = ip6_masklen(mask.sin6.sin6_addr); | |
718e3744 | 1086 | |
1087 | #ifdef KAME | |
d62a17ae | 1088 | if (IN6_IS_ADDR_LINKLOCAL(&gate.sin6.sin6_addr)) { |
1089 | ifindex = IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr); | |
1090 | SET_IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr, 0); | |
1091 | } | |
718e3744 | 1092 | #endif /* KAME */ |
1093 | ||
a8309422 DL |
1094 | if (!nh.type) { |
1095 | nh.type = ifindex ? NEXTHOP_TYPE_IPV6_IFINDEX | |
1096 | : NEXTHOP_TYPE_IPV6; | |
1097 | nh.gate.ipv6 = gate.sin6.sin6_addr; | |
1098 | nh.ifindex = ifindex; | |
1099 | } | |
026745a2 DS |
1100 | } else |
1101 | return; | |
d62a17ae | 1102 | |
026745a2 DS |
1103 | /* |
1104 | * CHANGE: delete the old prefix, we have no further information | |
1105 | * to specify the route really | |
1106 | */ | |
1107 | if (rtm->rtm_type == RTM_CHANGE) | |
1108 | rib_delete(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, | |
bc541126 | 1109 | 0, zebra_flags, &p, NULL, NULL, 0, RT_TABLE_MAIN, 0, |
0aaa7228 | 1110 | 0, true, false); |
026745a2 DS |
1111 | if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD |
1112 | || rtm->rtm_type == RTM_CHANGE) | |
1113 | rib_add(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0, | |
8032b717 SW |
1114 | zebra_flags, &p, NULL, &nh, 0, RT_TABLE_MAIN, |
1115 | 0, 0, 0, 0); | |
026745a2 DS |
1116 | else |
1117 | rib_delete(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, | |
bc541126 | 1118 | 0, zebra_flags, &p, NULL, &nh, 0, RT_TABLE_MAIN, 0, |
0aaa7228 | 1119 | 0, true, false); |
718e3744 | 1120 | } |
1121 | ||
1122 | /* Interface function for the kernel routing table updates. Support | |
6621ca86 | 1123 | * for RTM_CHANGE will be needed. |
1124 | * Exported only for rt_socket.c | |
1125 | */ | |
d62a17ae | 1126 | int rtm_write(int message, union sockunion *dest, union sockunion *mask, |
1127 | union sockunion *gate, union sockunion *mpls, unsigned int index, | |
a8309422 | 1128 | enum blackhole_type bh_type, int metric) |
718e3744 | 1129 | { |
d62a17ae | 1130 | int ret; |
1131 | caddr_t pnt; | |
1132 | struct interface *ifp; | |
1133 | ||
1134 | /* Sequencial number of routing message. */ | |
1135 | static int msg_seq = 0; | |
1136 | ||
1137 | /* Struct of rt_msghdr and buffer for storing socket's data. */ | |
1138 | struct { | |
1139 | struct rt_msghdr rtm; | |
1140 | char buf[512]; | |
1141 | } msg; | |
1142 | ||
80776aec | 1143 | if (dplane_routing_sock < 0) |
d62a17ae | 1144 | return ZEBRA_ERR_EPERM; |
1145 | ||
1146 | /* Clear and set rt_msghdr values */ | |
1147 | memset(&msg, 0, sizeof(struct rt_msghdr)); | |
1148 | msg.rtm.rtm_version = RTM_VERSION; | |
1149 | msg.rtm.rtm_type = message; | |
1150 | msg.rtm.rtm_seq = msg_seq++; | |
1151 | msg.rtm.rtm_addrs = RTA_DST; | |
1152 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
1153 | msg.rtm.rtm_flags = RTF_UP; | |
fe6c7157 | 1154 | #ifdef __OpenBSD__ |
d62a17ae | 1155 | msg.rtm.rtm_flags |= RTF_MPATH; |
1156 | msg.rtm.rtm_fmask = RTF_MPLS; | |
d3e2c74a | 1157 | #endif |
d62a17ae | 1158 | msg.rtm.rtm_index = index; |
718e3744 | 1159 | |
d62a17ae | 1160 | if (metric != 0) { |
1161 | msg.rtm.rtm_rmx.rmx_hopcount = metric; | |
1162 | msg.rtm.rtm_inits |= RTV_HOPCOUNT; | |
1163 | } | |
718e3744 | 1164 | |
d62a17ae | 1165 | ifp = if_lookup_by_index(index, VRF_DEFAULT); |
718e3744 | 1166 | |
d62a17ae | 1167 | if (gate && (message == RTM_ADD || message == RTM_CHANGE)) |
1168 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
718e3744 | 1169 | |
d62a17ae | 1170 | /* When RTF_CLONING is unavailable on BSD, should we set some |
1171 | * other flag instead? | |
1172 | */ | |
e6f148e6 | 1173 | #ifdef RTF_CLONING |
d62a17ae | 1174 | if (!gate && (message == RTM_ADD || message == RTM_CHANGE) && ifp |
1175 | && (ifp->flags & IFF_POINTOPOINT) == 0) | |
1176 | msg.rtm.rtm_flags |= RTF_CLONING; | |
e6f148e6 | 1177 | #endif /* RTF_CLONING */ |
718e3744 | 1178 | |
d62a17ae | 1179 | /* If no protocol specific gateway is specified, use link |
1180 | address for gateway. */ | |
1181 | if (!gate) { | |
1182 | if (!ifp) { | |
1183 | char dest_buf[INET_ADDRSTRLEN] = "NULL", | |
1184 | mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; | |
1185 | if (dest) | |
1186 | inet_ntop(AF_INET, &dest->sin.sin_addr, | |
1187 | dest_buf, INET_ADDRSTRLEN); | |
1188 | if (mask) | |
1189 | inet_ntop(AF_INET, &mask->sin.sin_addr, | |
1190 | mask_buf, INET_ADDRSTRLEN); | |
9df414fe | 1191 | flog_warn( |
e914ccbe | 1192 | EC_ZEBRA_RTM_NO_GATEWAY, |
d62a17ae | 1193 | "%s: %s/%s: gate == NULL and no gateway found for ifindex %d", |
1194 | __func__, dest_buf, mask_buf, index); | |
1195 | return -1; | |
1196 | } | |
1197 | gate = (union sockunion *)&((struct zebra_if *)ifp->info)->sdl; | |
1198 | } | |
1199 | ||
1200 | if (mask) | |
1201 | msg.rtm.rtm_addrs |= RTA_NETMASK; | |
1202 | else if (message == RTM_ADD || message == RTM_CHANGE) | |
1203 | msg.rtm.rtm_flags |= RTF_HOST; | |
718e3744 | 1204 | |
fe6c7157 | 1205 | #ifdef __OpenBSD__ |
d62a17ae | 1206 | if (mpls) { |
1207 | msg.rtm.rtm_addrs |= RTA_SRC; | |
1208 | msg.rtm.rtm_flags |= RTF_MPLS; | |
1209 | ||
1210 | if (mpls->smpls.smpls_label | |
70e98a7f | 1211 | != htonl(MPLS_LABEL_IMPLICIT_NULL << MPLS_LABEL_OFFSET)) |
d62a17ae | 1212 | msg.rtm.rtm_mpls = MPLS_OP_PUSH; |
1213 | } | |
d3e2c74a RW |
1214 | #endif |
1215 | ||
d62a17ae | 1216 | /* Tagging route with flags */ |
1217 | msg.rtm.rtm_flags |= (RTF_PROTO1); | |
718e3744 | 1218 | |
a8309422 DL |
1219 | switch (bh_type) { |
1220 | case BLACKHOLE_UNSPEC: | |
1221 | break; | |
1222 | case BLACKHOLE_REJECT: | |
d62a17ae | 1223 | msg.rtm.rtm_flags |= RTF_REJECT; |
a8309422 DL |
1224 | break; |
1225 | default: | |
1226 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
1227 | break; | |
1228 | } | |
81dfcaa2 | 1229 | |
718e3744 | 1230 | |
d62a17ae | 1231 | #define SOCKADDRSET(X, R) \ |
1232 | if (msg.rtm.rtm_addrs & (R)) { \ | |
1233 | int len = SAROUNDUP(X); \ | |
1234 | memcpy(pnt, (caddr_t)(X), len); \ | |
1235 | pnt += len; \ | |
1236 | } | |
718e3744 | 1237 | |
d62a17ae | 1238 | pnt = (caddr_t)msg.buf; |
718e3744 | 1239 | |
d62a17ae | 1240 | /* Write each socket data into rtm message buffer */ |
1241 | SOCKADDRSET(dest, RTA_DST); | |
1242 | SOCKADDRSET(gate, RTA_GATEWAY); | |
1243 | SOCKADDRSET(mask, RTA_NETMASK); | |
fe6c7157 | 1244 | #ifdef __OpenBSD__ |
d62a17ae | 1245 | SOCKADDRSET(mpls, RTA_SRC); |
d3e2c74a | 1246 | #endif |
718e3744 | 1247 | |
d62a17ae | 1248 | msg.rtm.rtm_msglen = pnt - (caddr_t)&msg; |
1249 | ||
80776aec | 1250 | ret = write(dplane_routing_sock, &msg, msg.rtm.rtm_msglen); |
d62a17ae | 1251 | |
1252 | if (ret != msg.rtm.rtm_msglen) { | |
1253 | if (errno == EEXIST) | |
1254 | return ZEBRA_ERR_RTEXIST; | |
1255 | if (errno == ENETUNREACH) | |
1256 | return ZEBRA_ERR_RTUNREACH; | |
1257 | if (errno == ESRCH) | |
1258 | return ZEBRA_ERR_RTNOEXIST; | |
1259 | ||
450971aa | 1260 | flog_err_sys(EC_LIB_SOCKET, "%s: write : %s (%d)", __func__, |
9df414fe | 1261 | safe_strerror(errno), errno); |
d62a17ae | 1262 | return ZEBRA_ERR_KERNEL; |
1263 | } | |
1264 | return ZEBRA_ERR_NOERROR; | |
718e3744 | 1265 | } |
1266 | ||
6b0655a2 | 1267 | |
718e3744 | 1268 | #include "thread.h" |
1269 | #include "zebra/zserv.h" | |
1270 | ||
718e3744 | 1271 | /* For debug purpose. */ |
d62a17ae | 1272 | static void rtmsg_debug(struct rt_msghdr *rtm) |
718e3744 | 1273 | { |
5b62211d RZ |
1274 | char fbuf[64]; |
1275 | ||
d62a17ae | 1276 | zlog_debug("Kernel: Len: %d Type: %s", rtm->rtm_msglen, |
1277 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); | |
1278 | rtm_flag_dump(rtm->rtm_flags); | |
1279 | zlog_debug("Kernel: message seq %d", rtm->rtm_seq); | |
5b62211d RZ |
1280 | zlog_debug("Kernel: pid %lld, rtm_addrs {%s}", (long long)rtm->rtm_pid, |
1281 | rtatostr(rtm->rtm_addrs, fbuf, sizeof(fbuf))); | |
718e3744 | 1282 | } |
1283 | ||
1284 | /* This is pretty gross, better suggestions welcome -- mhandler */ | |
1285 | #ifndef RTAX_MAX | |
1286 | #ifdef RTA_NUMBITS | |
1287 | #define RTAX_MAX RTA_NUMBITS | |
1288 | #else | |
1289 | #define RTAX_MAX 8 | |
1290 | #endif /* RTA_NUMBITS */ | |
1291 | #endif /* RTAX_MAX */ | |
1292 | ||
1293 | /* Kernel routing table and interface updates via routing socket. */ | |
d62a17ae | 1294 | static int kernel_read(struct thread *thread) |
718e3744 | 1295 | { |
d62a17ae | 1296 | int sock; |
1297 | int nbytes; | |
1298 | struct rt_msghdr *rtm; | |
1299 | ||
1300 | /* | |
1301 | * This must be big enough for any message the kernel might send. | |
1302 | * Rather than determining how many sockaddrs of what size might be | |
1303 | * in each particular message, just use RTAX_MAX of sockaddr_storage | |
1304 | * for each. Note that the sockaddrs must be after each message | |
1305 | * definition, or rather after whichever happens to be the largest, | |
1306 | * since the buffer needs to be big enough for a message and the | |
1307 | * sockaddrs together. | |
1308 | */ | |
1309 | union { | |
1310 | /* Routing information. */ | |
1311 | struct { | |
1312 | struct rt_msghdr rtm; | |
1313 | struct sockaddr_storage addr[RTAX_MAX]; | |
1314 | } r; | |
1315 | ||
1316 | /* Interface information. */ | |
1317 | struct { | |
1318 | struct if_msghdr ifm; | |
1319 | struct sockaddr_storage addr[RTAX_MAX]; | |
1320 | } im; | |
1321 | ||
1322 | /* Interface address information. */ | |
1323 | struct { | |
1324 | struct ifa_msghdr ifa; | |
1325 | struct sockaddr_storage addr[RTAX_MAX]; | |
1326 | } ia; | |
718e3744 | 1327 | |
1328 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 1329 | /* Interface arrival/departure */ |
1330 | struct { | |
1331 | struct if_announcemsghdr ifan; | |
1332 | struct sockaddr_storage addr[RTAX_MAX]; | |
1333 | } ian; | |
718e3744 | 1334 | #endif /* RTM_IFANNOUNCE */ |
1335 | ||
d62a17ae | 1336 | } buf; |
718e3744 | 1337 | |
d62a17ae | 1338 | /* Fetch routing socket. */ |
1339 | sock = THREAD_FD(thread); | |
718e3744 | 1340 | |
0d6f7fd6 | 1341 | nbytes = read(sock, &buf, sizeof(buf)); |
718e3744 | 1342 | |
68cd699d RM |
1343 | if (nbytes < 0) { |
1344 | if (errno == ENOBUFS) { | |
1345 | flog_err(EC_ZEBRA_RECVMSG_OVERRUN, | |
1346 | "routing socket overrun: %s", | |
1347 | safe_strerror(errno)); | |
1348 | /* | |
1349 | * In this case we are screwed. | |
1350 | * There is no good way to | |
1351 | * recover zebra at this point. | |
1352 | */ | |
1353 | exit(-1); | |
1354 | } | |
1355 | if (errno != EAGAIN && errno != EWOULDBLOCK) | |
450971aa | 1356 | flog_err_sys(EC_LIB_SOCKET, "routing socket error: %s", |
9df414fe | 1357 | safe_strerror(errno)); |
d62a17ae | 1358 | return 0; |
1359 | } | |
718e3744 | 1360 | |
68cd699d RM |
1361 | if (nbytes == 0) |
1362 | return 0; | |
1363 | ||
3801e764 | 1364 | thread_add_read(zrouter.master, kernel_read, NULL, sock, NULL); |
718e3744 | 1365 | |
d62a17ae | 1366 | if (IS_ZEBRA_DEBUG_KERNEL) |
1367 | rtmsg_debug(&buf.r.rtm); | |
718e3744 | 1368 | |
d62a17ae | 1369 | rtm = &buf.r.rtm; |
718e3744 | 1370 | |
d62a17ae | 1371 | /* |
1372 | * Ensure that we didn't drop any data, so that processing routines | |
1373 | * can assume they have the whole message. | |
1374 | */ | |
1375 | if (rtm->rtm_msglen != nbytes) { | |
9df414fe | 1376 | zlog_debug( |
63efca0e | 1377 | "kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d", |
d62a17ae | 1378 | rtm->rtm_msglen, nbytes, rtm->rtm_type); |
1379 | return -1; | |
1380 | } | |
1381 | ||
1382 | switch (rtm->rtm_type) { | |
1383 | case RTM_ADD: | |
1384 | case RTM_DELETE: | |
1385 | case RTM_CHANGE: | |
1386 | rtm_read(rtm); | |
1387 | break; | |
1388 | case RTM_IFINFO: | |
1389 | ifm_read(&buf.im.ifm); | |
1390 | break; | |
1391 | case RTM_NEWADDR: | |
1392 | case RTM_DELADDR: | |
1393 | ifam_read(&buf.ia.ifa); | |
1394 | break; | |
718e3744 | 1395 | #ifdef RTM_IFANNOUNCE |
d62a17ae | 1396 | case RTM_IFANNOUNCE: |
1397 | ifan_read(&buf.ian.ifan); | |
1398 | break; | |
718e3744 | 1399 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 1400 | default: |
1401 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1402 | zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); | |
1403 | break; | |
1404 | } | |
1405 | return 0; | |
718e3744 | 1406 | } |
1407 | ||
1408 | /* Make routing socket. */ | |
d62a17ae | 1409 | static void routing_socket(struct zebra_ns *zns) |
718e3744 | 1410 | { |
0cf6db21 | 1411 | frr_with_privs(&zserv_privs) { |
6bb30c2c | 1412 | routing_sock = ns_socket(AF_ROUTE, SOCK_RAW, 0, zns->ns_id); |
80776aec MS |
1413 | |
1414 | dplane_routing_sock = | |
1415 | ns_socket(AF_ROUTE, SOCK_RAW, 0, zns->ns_id); | |
6bb30c2c | 1416 | } |
d62a17ae | 1417 | |
1418 | if (routing_sock < 0) { | |
1c50c1c0 | 1419 | flog_err_sys(EC_LIB_SOCKET, "Can't init kernel routing socket"); |
d62a17ae | 1420 | return; |
1421 | } | |
1422 | ||
80776aec MS |
1423 | if (dplane_routing_sock < 0) { |
1424 | flog_err_sys(EC_LIB_SOCKET, | |
1425 | "Can't init kernel dataplane routing socket"); | |
1426 | return; | |
1427 | } | |
1428 | ||
68cd699d RM |
1429 | #ifdef SO_RERROR |
1430 | /* Allow reporting of route(4) buffer overflow errors */ | |
1431 | int n = 1; | |
355c74b7 | 1432 | |
68cd699d RM |
1433 | if (setsockopt(routing_sock, SOL_SOCKET, SO_RERROR, &n, sizeof(n)) < 0) |
1434 | flog_err_sys(EC_LIB_SOCKET, | |
1435 | "Can't set SO_RERROR on routing socket"); | |
1436 | #endif | |
1437 | ||
d62a17ae | 1438 | /* XXX: Socket should be NONBLOCK, however as we currently |
1439 | * discard failed writes, this will lead to inconsistencies. | |
1440 | * For now, socket must be blocking. | |
1441 | */ | |
1442 | /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) | |
1443 | zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ | |
1444 | ||
d62a17ae | 1445 | /* kernel_read needs rewrite. */ |
3801e764 | 1446 | thread_add_read(zrouter.master, kernel_read, NULL, routing_sock, NULL); |
718e3744 | 1447 | } |
1448 | ||
1449 | /* Exported interface function. This function simply calls | |
1450 | routing_socket (). */ | |
d62a17ae | 1451 | void kernel_init(struct zebra_ns *zns) |
8f7d9fc0 | 1452 | { |
d62a17ae | 1453 | routing_socket(zns); |
8f7d9fc0 FL |
1454 | } |
1455 | ||
62b8bb7a | 1456 | void kernel_terminate(struct zebra_ns *zns, bool complete) |
718e3744 | 1457 | { |
d62a17ae | 1458 | return; |
718e3744 | 1459 | } |
ddfeb486 | 1460 | |
fef24b03 JU |
1461 | void kernel_update_multi(struct dplane_ctx_q *ctx_list) |
1462 | { | |
18f60fe9 JU |
1463 | struct zebra_dplane_ctx *ctx; |
1464 | struct dplane_ctx_q handled_list; | |
1465 | enum zebra_dplane_result res; | |
fef24b03 | 1466 | |
18f60fe9 JU |
1467 | TAILQ_INIT(&handled_list); |
1468 | ||
1469 | while (true) { | |
1470 | ctx = dplane_ctx_dequeue(ctx_list); | |
1471 | if (ctx == NULL) | |
1472 | break; | |
1473 | ||
1474 | /* | |
1475 | * A previous provider plugin may have asked to skip the | |
1476 | * kernel update. | |
1477 | */ | |
1478 | if (dplane_ctx_is_skip_kernel(ctx)) { | |
1479 | res = ZEBRA_DPLANE_REQUEST_SUCCESS; | |
1480 | goto skip_one; | |
1481 | } | |
1482 | ||
1483 | switch (dplane_ctx_get_op(ctx)) { | |
1484 | ||
1485 | case DPLANE_OP_ROUTE_INSTALL: | |
1486 | case DPLANE_OP_ROUTE_UPDATE: | |
1487 | case DPLANE_OP_ROUTE_DELETE: | |
1488 | res = kernel_route_update(ctx); | |
1489 | break; | |
1490 | ||
1491 | case DPLANE_OP_NH_INSTALL: | |
1492 | case DPLANE_OP_NH_UPDATE: | |
1493 | case DPLANE_OP_NH_DELETE: | |
1494 | res = kernel_nexthop_update(ctx); | |
1495 | break; | |
1496 | ||
1497 | case DPLANE_OP_LSP_INSTALL: | |
1498 | case DPLANE_OP_LSP_UPDATE: | |
1499 | case DPLANE_OP_LSP_DELETE: | |
1500 | res = kernel_lsp_update(ctx); | |
1501 | break; | |
1502 | ||
1503 | case DPLANE_OP_PW_INSTALL: | |
1504 | case DPLANE_OP_PW_UNINSTALL: | |
1505 | res = kernel_pw_update(ctx); | |
1506 | break; | |
1507 | ||
1508 | case DPLANE_OP_ADDR_INSTALL: | |
1509 | case DPLANE_OP_ADDR_UNINSTALL: | |
1510 | res = kernel_address_update_ctx(ctx); | |
1511 | break; | |
1512 | ||
1513 | case DPLANE_OP_MAC_INSTALL: | |
1514 | case DPLANE_OP_MAC_DELETE: | |
1515 | res = kernel_mac_update_ctx(ctx); | |
1516 | break; | |
1517 | ||
1518 | case DPLANE_OP_NEIGH_INSTALL: | |
1519 | case DPLANE_OP_NEIGH_UPDATE: | |
1520 | case DPLANE_OP_NEIGH_DELETE: | |
1521 | case DPLANE_OP_VTEP_ADD: | |
1522 | case DPLANE_OP_VTEP_DELETE: | |
d68e74b4 | 1523 | case DPLANE_OP_NEIGH_DISCOVER: |
18f60fe9 JU |
1524 | res = kernel_neigh_update_ctx(ctx); |
1525 | break; | |
1526 | ||
1527 | case DPLANE_OP_RULE_ADD: | |
1528 | case DPLANE_OP_RULE_DELETE: | |
1529 | case DPLANE_OP_RULE_UPDATE: | |
1530 | res = kernel_pbr_rule_update(ctx); | |
1531 | break; | |
1532 | ||
1533 | /* Ignore 'notifications' - no-op */ | |
1534 | case DPLANE_OP_SYS_ROUTE_ADD: | |
1535 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
1536 | case DPLANE_OP_ROUTE_NOTIFY: | |
1537 | case DPLANE_OP_LSP_NOTIFY: | |
1538 | res = ZEBRA_DPLANE_REQUEST_SUCCESS; | |
1539 | break; | |
1540 | ||
1541 | default: | |
1542 | res = ZEBRA_DPLANE_REQUEST_FAILURE; | |
1543 | break; | |
1544 | } | |
1545 | ||
1546 | skip_one: | |
1547 | dplane_ctx_set_status(ctx, res); | |
1548 | ||
1549 | dplane_ctx_enqueue_tail(&handled_list, ctx); | |
1550 | } | |
1551 | ||
1552 | TAILQ_INIT(ctx_list); | |
1553 | dplane_ctx_list_append(ctx_list, &handled_list); | |
fef24b03 JU |
1554 | } |
1555 | ||
ddfeb486 | 1556 | #endif /* !HAVE_NETLINK */ |