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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 | ||
f7f9a982 DL |
83 | #if defined(SUNOS_5) |
84 | /* Solaris has struct sockaddr_in[6] definitions at 16 / 32 bytes size, | |
85 | * so the whole concept doesn't really apply. */ | |
86 | #define ROUNDUP(a) (a) | |
87 | #endif | |
88 | ||
cfa0ed09 GT |
89 | /* |
90 | * If ROUNDUP has not yet been defined in terms of platform-provided | |
91 | * defines, attempt to cope with heuristics. | |
92 | */ | |
93 | #if !defined(ROUNDUP) | |
94 | ||
95 | /* | |
adf580f7 DL |
96 | * If you're porting to a platform that changed RT_ROUNDUP but doesn't |
97 | * have it in its headers, this will break rather obviously and you'll | |
98 | * have to fix it here. | |
cfa0ed09 | 99 | */ |
d62a17ae | 100 | #define ROUNDUP(a) \ |
101 | ((a) > 0 ? (1 + (((a)-1) | (sizeof(ROUNDUP_TYPE) - 1))) \ | |
102 | : sizeof(ROUNDUP_TYPE)) | |
cfa0ed09 GT |
103 | |
104 | #endif /* defined(ROUNDUP) */ | |
105 | ||
cb800e35 RZ |
106 | |
107 | #if defined(SA_SIZE) | |
108 | /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */ | |
109 | #define SAROUNDUP(a) SA_SIZE(a) | |
110 | #else /* !SA_SIZE */ | |
4bfbea8c | 111 | /* |
112 | * Given a pointer (sockaddr or void *), return the number of bytes | |
113 | * taken up by the sockaddr and any padding needed for alignment. | |
114 | */ | |
6f0e3f6e | 115 | #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN) |
4bfbea8c | 116 | #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len) |
56c1f7d8 | 117 | #else |
4bfbea8c | 118 | /* |
119 | * One would hope all fixed-size structure definitions are aligned, | |
120 | * but round them up nonetheless. | |
121 | */ | |
d62a17ae | 122 | #define SAROUNDUP(X) \ |
123 | (((struct sockaddr *)(X))->sa_family == AF_INET \ | |
124 | ? ROUNDUP(sizeof(struct sockaddr_in)) \ | |
125 | : (((struct sockaddr *)(X))->sa_family == AF_INET6 \ | |
126 | ? ROUNDUP(sizeof(struct sockaddr_in6)) \ | |
127 | : (((struct sockaddr *)(X))->sa_family == AF_LINK \ | |
128 | ? ROUNDUP(sizeof(struct sockaddr_dl)) \ | |
129 | : sizeof(struct sockaddr)))) | |
6f0e3f6e | 130 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ |
718e3744 | 131 | |
e7f0e649 DL |
132 | #endif /* !SA_SIZE */ |
133 | ||
718e3744 | 134 | /* Routing socket message types. */ |
d62a17ae | 135 | const struct message rtm_type_str[] = {{RTM_ADD, "RTM_ADD"}, |
136 | {RTM_DELETE, "RTM_DELETE"}, | |
137 | {RTM_CHANGE, "RTM_CHANGE"}, | |
138 | {RTM_GET, "RTM_GET"}, | |
139 | {RTM_LOSING, "RTM_LOSING"}, | |
140 | {RTM_REDIRECT, "RTM_REDIRECT"}, | |
141 | {RTM_MISS, "RTM_MISS"}, | |
7f7651eb | 142 | #ifdef RTM_LOCK |
d62a17ae | 143 | {RTM_LOCK, "RTM_LOCK"}, |
7f7651eb | 144 | #endif /* RTM_LOCK */ |
9458b819 | 145 | #ifdef OLDADD |
d62a17ae | 146 | {RTM_OLDADD, "RTM_OLDADD"}, |
9458b819 GT |
147 | #endif /* RTM_OLDADD */ |
148 | #ifdef RTM_OLDDEL | |
d62a17ae | 149 | {RTM_OLDDEL, "RTM_OLDDEL"}, |
9458b819 | 150 | #endif /* RTM_OLDDEL */ |
5f11807b | 151 | #ifdef RTM_RESOLVE |
d62a17ae | 152 | {RTM_RESOLVE, "RTM_RESOLVE"}, |
5f11807b | 153 | #endif /* RTM_RESOLVE */ |
d62a17ae | 154 | {RTM_NEWADDR, "RTM_NEWADDR"}, |
155 | {RTM_DELADDR, "RTM_DELADDR"}, | |
156 | {RTM_IFINFO, "RTM_IFINFO"}, | |
718e3744 | 157 | #ifdef RTM_OIFINFO |
d62a17ae | 158 | {RTM_OIFINFO, "RTM_OIFINFO"}, |
718e3744 | 159 | #endif /* RTM_OIFINFO */ |
160 | #ifdef RTM_NEWMADDR | |
d62a17ae | 161 | {RTM_NEWMADDR, "RTM_NEWMADDR"}, |
718e3744 | 162 | #endif /* RTM_NEWMADDR */ |
163 | #ifdef RTM_DELMADDR | |
d62a17ae | 164 | {RTM_DELMADDR, "RTM_DELMADDR"}, |
718e3744 | 165 | #endif /* RTM_DELMADDR */ |
166 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 167 | {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, |
718e3744 | 168 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 169 | {0}}; |
170 | ||
171 | static const struct message rtm_flag_str[] = {{RTF_UP, "UP"}, | |
172 | {RTF_GATEWAY, "GATEWAY"}, | |
173 | {RTF_HOST, "HOST"}, | |
174 | {RTF_REJECT, "REJECT"}, | |
175 | {RTF_DYNAMIC, "DYNAMIC"}, | |
176 | {RTF_MODIFIED, "MODIFIED"}, | |
177 | {RTF_DONE, "DONE"}, | |
718e3744 | 178 | #ifdef RTF_MASK |
d62a17ae | 179 | {RTF_MASK, "MASK"}, |
718e3744 | 180 | #endif /* RTF_MASK */ |
e6f148e6 | 181 | #ifdef RTF_CLONING |
d62a17ae | 182 | {RTF_CLONING, "CLONING"}, |
e6f148e6 | 183 | #endif /* RTF_CLONING */ |
23b1f400 | 184 | #ifdef RTF_XRESOLVE |
d62a17ae | 185 | {RTF_XRESOLVE, "XRESOLVE"}, |
23b1f400 | 186 | #endif /* RTF_XRESOLVE */ |
c54632ec | 187 | #ifdef RTF_LLINFO |
d62a17ae | 188 | {RTF_LLINFO, "LLINFO"}, |
c54632ec | 189 | #endif /* RTF_LLINFO */ |
d62a17ae | 190 | {RTF_STATIC, "STATIC"}, |
191 | {RTF_BLACKHOLE, "BLACKHOLE"}, | |
6fe70d1b | 192 | #ifdef RTF_PRIVATE |
d62a17ae | 193 | {RTF_PRIVATE, "PRIVATE"}, |
6fe70d1b | 194 | #endif /* RTF_PRIVATE */ |
d62a17ae | 195 | {RTF_PROTO1, "PROTO1"}, |
196 | {RTF_PROTO2, "PROTO2"}, | |
718e3744 | 197 | #ifdef RTF_PRCLONING |
d62a17ae | 198 | {RTF_PRCLONING, "PRCLONING"}, |
718e3744 | 199 | #endif /* RTF_PRCLONING */ |
200 | #ifdef RTF_WASCLONED | |
d62a17ae | 201 | {RTF_WASCLONED, "WASCLONED"}, |
718e3744 | 202 | #endif /* RTF_WASCLONED */ |
203 | #ifdef RTF_PROTO3 | |
d62a17ae | 204 | {RTF_PROTO3, "PROTO3"}, |
718e3744 | 205 | #endif /* RTF_PROTO3 */ |
206 | #ifdef RTF_PINNED | |
d62a17ae | 207 | {RTF_PINNED, "PINNED"}, |
718e3744 | 208 | #endif /* RTF_PINNED */ |
209 | #ifdef RTF_LOCAL | |
d62a17ae | 210 | {RTF_LOCAL, "LOCAL"}, |
718e3744 | 211 | #endif /* RTF_LOCAL */ |
212 | #ifdef RTF_BROADCAST | |
d62a17ae | 213 | {RTF_BROADCAST, "BROADCAST"}, |
718e3744 | 214 | #endif /* RTF_BROADCAST */ |
215 | #ifdef RTF_MULTICAST | |
d62a17ae | 216 | {RTF_MULTICAST, "MULTICAST"}, |
718e3744 | 217 | #endif /* RTF_MULTICAST */ |
6fe70d1b | 218 | #ifdef RTF_MULTIRT |
d62a17ae | 219 | {RTF_MULTIRT, "MULTIRT"}, |
6fe70d1b | 220 | #endif /* RTF_MULTIRT */ |
221 | #ifdef RTF_SETSRC | |
d62a17ae | 222 | {RTF_SETSRC, "SETSRC"}, |
6fe70d1b | 223 | #endif /* RTF_SETSRC */ |
d62a17ae | 224 | {0}}; |
718e3744 | 225 | |
226 | /* Kernel routing update socket. */ | |
227 | int routing_sock = -1; | |
228 | ||
80776aec MS |
229 | /* Kernel dataplane routing update socket, used in the dataplane pthread |
230 | * context. | |
231 | */ | |
232 | int dplane_routing_sock = -1; | |
233 | ||
718e3744 | 234 | /* Yes I'm checking ugly routing socket behavior. */ |
235 | /* #define DEBUG */ | |
236 | ||
19fb538d | 237 | size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf); |
86c57af5 | 238 | size_t rta_get(caddr_t sap, void *dest, size_t destlen); |
19fb538d | 239 | size_t rta_getattr(caddr_t sap, void *destp, size_t destlen); |
86c57af5 | 240 | size_t rta_getsdlname(caddr_t sap, void *dest, short *destlen); |
5b62211d | 241 | const char *rtatostr(unsigned int flags, char *buf, size_t buflen); |
86c57af5 | 242 | |
718e3744 | 243 | /* Supported address family check. */ |
d62a17ae | 244 | static inline int af_check(int family) |
718e3744 | 245 | { |
d62a17ae | 246 | if (family == AF_INET) |
247 | return 1; | |
248 | if (family == AF_INET6) | |
249 | return 1; | |
250 | return 0; | |
718e3744 | 251 | } |
6b0655a2 | 252 | |
19fb538d | 253 | size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf) |
86c57af5 RZ |
254 | { |
255 | struct sockaddr *sa = (struct sockaddr *)sap; | |
75e710df | 256 | struct sockaddr_dl *sdl; |
86c57af5 RZ |
257 | uint8_t *dest = destp; |
258 | size_t tlen, copylen; | |
259 | ||
260 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
261 | copylen = sa->sa_len; | |
262 | tlen = (copylen == 0) ? sizeof(ROUNDUP_TYPE) : ROUNDUP(copylen); | |
263 | #else /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
264 | copylen = tlen = SAROUNDUP(sap); | |
265 | #endif /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
266 | ||
19fb538d RZ |
267 | if (copylen > 0 && dest != NULL) { |
268 | if (checkaf && af_check(sa->sa_family) == 0) | |
269 | return tlen; | |
75e710df RZ |
270 | /* |
271 | * Handle sockaddr_dl corner case: | |
272 | * RTA_NETMASK might be AF_LINK, but it doesn't anything | |
273 | * relevant (e.g. zeroed out fields). Check for this | |
274 | * case and avoid warning log message. | |
275 | */ | |
276 | if (sa->sa_family == AF_LINK) { | |
277 | sdl = (struct sockaddr_dl *)sa; | |
278 | if (sdl->sdl_index == 0 || sdl->sdl_nlen == 0) | |
e0f741f4 | 279 | copylen = destlen; |
75e710df | 280 | } |
19fb538d | 281 | |
86c57af5 | 282 | if (copylen > destlen) { |
fa0069c6 DS |
283 | zlog_warn( |
284 | "%s: destination buffer too small (%zu vs %zu)", | |
285 | __func__, copylen, destlen); | |
86c57af5 RZ |
286 | memcpy(dest, sap, destlen); |
287 | } else | |
288 | memcpy(dest, sap, copylen); | |
289 | } | |
290 | ||
291 | return tlen; | |
292 | } | |
293 | ||
19fb538d RZ |
294 | size_t rta_get(caddr_t sap, void *destp, size_t destlen) |
295 | { | |
296 | return _rta_get(sap, destp, destlen, true); | |
297 | } | |
298 | ||
299 | size_t rta_getattr(caddr_t sap, void *destp, size_t destlen) | |
300 | { | |
301 | return _rta_get(sap, destp, destlen, false); | |
302 | } | |
303 | ||
86c57af5 RZ |
304 | size_t rta_getsdlname(caddr_t sap, void *destp, short *destlen) |
305 | { | |
306 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)sap; | |
86c57af5 RZ |
307 | uint8_t *dest = destp; |
308 | size_t tlen, copylen; | |
309 | ||
310 | copylen = sdl->sdl_nlen; | |
311 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
8054cf97 QY |
312 | struct sockaddr *sa = (struct sockaddr *)sap; |
313 | ||
86c57af5 RZ |
314 | tlen = (sa->sa_len == 0) ? sizeof(ROUNDUP_TYPE) : ROUNDUP(sa->sa_len); |
315 | #else /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
316 | tlen = SAROUNDUP(sap); | |
317 | #endif /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
318 | ||
319 | if (copylen > 0 && dest != NULL && sdl->sdl_family == AF_LINK) { | |
320 | if (copylen > IFNAMSIZ) { | |
fa0069c6 DS |
321 | zlog_warn( |
322 | "%s: destination buffer too small (%zu vs %d)", | |
323 | __func__, copylen, IFNAMSIZ); | |
86c57af5 RZ |
324 | memcpy(dest, sdl->sdl_data, IFNAMSIZ); |
325 | dest[IFNAMSIZ] = 0; | |
326 | *destlen = IFNAMSIZ; | |
327 | } else { | |
328 | memcpy(dest, sdl->sdl_data, copylen); | |
329 | dest[copylen] = 0; | |
330 | *destlen = copylen; | |
331 | } | |
332 | } else | |
333 | *destlen = 0; | |
334 | ||
335 | return tlen; | |
336 | } | |
337 | ||
5b62211d RZ |
338 | const char *rtatostr(unsigned int flags, char *buf, size_t buflen) |
339 | { | |
340 | const char *flagstr, *bufstart; | |
341 | int bit, wlen; | |
342 | char ustr[32]; | |
343 | ||
344 | /* Hold the pointer to the buffer beginning. */ | |
345 | bufstart = buf; | |
346 | ||
347 | for (bit = 1; bit; bit <<= 1) { | |
348 | if ((flags & bit) == 0) | |
349 | continue; | |
350 | ||
351 | switch (bit) { | |
352 | case RTA_DST: | |
353 | flagstr = "DST"; | |
354 | break; | |
355 | case RTA_GATEWAY: | |
356 | flagstr = "GATEWAY"; | |
357 | break; | |
358 | case RTA_NETMASK: | |
359 | flagstr = "NETMASK"; | |
360 | break; | |
361 | #ifdef RTA_GENMASK | |
362 | case RTA_GENMASK: | |
363 | flagstr = "GENMASK"; | |
364 | break; | |
365 | #endif /* RTA_GENMASK */ | |
366 | case RTA_IFP: | |
367 | flagstr = "IFP"; | |
368 | break; | |
369 | case RTA_IFA: | |
370 | flagstr = "IFA"; | |
371 | break; | |
372 | #ifdef RTA_AUTHOR | |
373 | case RTA_AUTHOR: | |
374 | flagstr = "AUTHOR"; | |
375 | break; | |
376 | #endif /* RTA_AUTHOR */ | |
377 | case RTA_BRD: | |
378 | flagstr = "BRD"; | |
379 | break; | |
380 | #ifdef RTA_SRC | |
381 | case RTA_SRC: | |
382 | flagstr = "SRC"; | |
383 | break; | |
384 | #endif /* RTA_SRC */ | |
385 | #ifdef RTA_SRCMASK | |
386 | case RTA_SRCMASK: | |
387 | flagstr = "SRCMASK"; | |
388 | break; | |
389 | #endif /* RTA_SRCMASK */ | |
390 | #ifdef RTA_LABEL | |
391 | case RTA_LABEL: | |
392 | flagstr = "LABEL"; | |
393 | break; | |
394 | #endif /* RTA_LABEL */ | |
395 | ||
396 | default: | |
397 | snprintf(ustr, sizeof(ustr), "0x%x", bit); | |
398 | flagstr = ustr; | |
399 | break; | |
400 | } | |
401 | ||
402 | wlen = snprintf(buf, buflen, "%s,", flagstr); | |
403 | buf += wlen; | |
404 | buflen -= wlen; | |
405 | } | |
406 | ||
407 | /* Check for empty buffer. */ | |
408 | if (bufstart != buf) | |
409 | buf--; | |
410 | ||
411 | /* Remove the last comma. */ | |
412 | *buf = 0; | |
413 | ||
414 | return bufstart; | |
415 | } | |
416 | ||
718e3744 | 417 | /* Dump routing table flag for debug purpose. */ |
d62a17ae | 418 | static void rtm_flag_dump(int flag) |
718e3744 | 419 | { |
d62a17ae | 420 | const struct message *mes; |
421 | static char buf[BUFSIZ]; | |
422 | ||
423 | buf[0] = '\0'; | |
424 | for (mes = rtm_flag_str; mes->key != 0; mes++) { | |
425 | if (mes->key & flag) { | |
426 | strlcat(buf, mes->str, BUFSIZ); | |
427 | strlcat(buf, " ", BUFSIZ); | |
428 | } | |
718e3744 | 429 | } |
d62a17ae | 430 | zlog_debug("Kernel: %s", buf); |
718e3744 | 431 | } |
432 | ||
433 | #ifdef RTM_IFANNOUNCE | |
434 | /* Interface adding function */ | |
d62a17ae | 435 | static int ifan_read(struct if_announcemsghdr *ifan) |
718e3744 | 436 | { |
d62a17ae | 437 | struct interface *ifp; |
438 | ||
439 | ifp = if_lookup_by_index(ifan->ifan_index, VRF_DEFAULT); | |
440 | ||
441 | if (ifp) | |
442 | assert((ifp->ifindex == ifan->ifan_index) | |
443 | || (ifp->ifindex == IFINDEX_INTERNAL)); | |
444 | ||
9d303b37 DL |
445 | if ((ifp == NULL) || ((ifp->ifindex == IFINDEX_INTERNAL) |
446 | && (ifan->ifan_what == IFAN_ARRIVAL))) { | |
d62a17ae | 447 | if (IS_ZEBRA_DEBUG_KERNEL) |
448 | zlog_debug( | |
449 | "%s: creating interface for ifindex %d, name %s", | |
450 | __func__, ifan->ifan_index, ifan->ifan_name); | |
451 | ||
452 | /* Create Interface */ | |
a36898e7 | 453 | ifp = if_get_by_name(ifan->ifan_name, VRF_DEFAULT); |
ff880b78 | 454 | if_set_index(ifp, ifan->ifan_index); |
d62a17ae | 455 | |
456 | if_get_metric(ifp); | |
457 | if_add_update(ifp); | |
458 | } else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) | |
459 | if_delete_update(ifp); | |
460 | ||
461 | if_get_flags(ifp); | |
462 | if_get_mtu(ifp); | |
463 | if_get_metric(ifp); | |
464 | ||
465 | if (IS_ZEBRA_DEBUG_KERNEL) | |
466 | zlog_debug("%s: interface %s index %d", __func__, | |
467 | ifan->ifan_name, ifan->ifan_index); | |
468 | ||
469 | return 0; | |
718e3744 | 470 | } |
471 | #endif /* RTM_IFANNOUNCE */ | |
472 | ||
9234b382 | 473 | #ifdef HAVE_BSD_IFI_LINK_STATE |
c543a173 | 474 | /* BSD link detect translation */ |
d62a17ae | 475 | static void bsd_linkdetect_translate(struct if_msghdr *ifm) |
c543a173 | 476 | { |
d62a17ae | 477 | if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) |
478 | || (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) | |
479 | SET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
480 | else | |
481 | UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
c543a173 | 482 | } |
9234b382 | 483 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 484 | |
d62a17ae | 485 | static enum zebra_link_type sdl_to_zebra_link_type(unsigned int sdlt) |
8ccc7e80 | 486 | { |
d62a17ae | 487 | switch (sdlt) { |
488 | case IFT_ETHER: | |
489 | return ZEBRA_LLT_ETHER; | |
490 | case IFT_X25: | |
491 | return ZEBRA_LLT_X25; | |
492 | case IFT_FDDI: | |
493 | return ZEBRA_LLT_FDDI; | |
494 | case IFT_PPP: | |
495 | return ZEBRA_LLT_PPP; | |
496 | case IFT_LOOP: | |
497 | return ZEBRA_LLT_LOOPBACK; | |
498 | case IFT_SLIP: | |
499 | return ZEBRA_LLT_SLIP; | |
500 | case IFT_ARCNET: | |
501 | return ZEBRA_LLT_ARCNET; | |
502 | case IFT_ATM: | |
503 | return ZEBRA_LLT_ATM; | |
504 | case IFT_LOCALTALK: | |
505 | return ZEBRA_LLT_LOCALTLK; | |
506 | case IFT_HIPPI: | |
507 | return ZEBRA_LLT_HIPPI; | |
8ccc7e80 | 508 | #ifdef IFT_IEEE1394 |
d62a17ae | 509 | case IFT_IEEE1394: |
510 | return ZEBRA_LLT_IEEE1394; | |
8ccc7e80 TT |
511 | #endif |
512 | ||
d62a17ae | 513 | default: |
514 | return ZEBRA_LLT_UNKNOWN; | |
515 | } | |
8ccc7e80 TT |
516 | } |
517 | ||
da26e3b6 | 518 | /* |
519 | * Handle struct if_msghdr obtained from reading routing socket or | |
520 | * sysctl (from interface_list). There may or may not be sockaddrs | |
521 | * present after the header. | |
522 | */ | |
d62a17ae | 523 | int ifm_read(struct if_msghdr *ifm) |
718e3744 | 524 | { |
d62a17ae | 525 | struct interface *ifp = NULL; |
ee74220b | 526 | struct sockaddr_dl *sdl = NULL; |
d62a17ae | 527 | char ifname[IFNAMSIZ]; |
528 | short ifnlen = 0; | |
86c57af5 | 529 | int maskbit; |
d62a17ae | 530 | caddr_t cp; |
5b62211d | 531 | char fbuf[64]; |
d62a17ae | 532 | |
533 | /* terminate ifname at head (for strnlen) and tail (for safety) */ | |
534 | ifname[IFNAMSIZ - 1] = '\0'; | |
535 | ||
536 | /* paranoia: sanity check structure */ | |
537 | if (ifm->ifm_msglen < sizeof(struct if_msghdr)) { | |
e914ccbe | 538 | flog_err(EC_ZEBRA_NETLINK_LENGTH_ERROR, |
1c50c1c0 QY |
539 | "ifm_read: ifm->ifm_msglen %d too short\n", |
540 | ifm->ifm_msglen); | |
d62a17ae | 541 | return -1; |
542 | } | |
543 | ||
544 | /* | |
545 | * Check for a sockaddr_dl following the message. First, point to | |
546 | * where a socakddr might be if one follows the message. | |
547 | */ | |
548 | cp = (void *)(ifm + 1); | |
718e3744 | 549 | |
4bfbea8c | 550 | #ifdef SUNOS_5 |
d62a17ae | 551 | /* |
552 | * XXX This behavior should be narrowed to only the kernel versions | |
553 | * for which the structures returned do not match the headers. | |
554 | * | |
555 | * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions | |
556 | * is 12 bytes larger than the 32 bit version. | |
557 | */ | |
558 | if (((struct sockaddr *)cp)->sa_family == AF_UNSPEC) | |
559 | cp = cp + 12; | |
4bfbea8c | 560 | #endif |
3e95a074 | 561 | |
86c57af5 RZ |
562 | /* Look up for RTA_IFP and skip others. */ |
563 | for (maskbit = 1; maskbit; maskbit <<= 1) { | |
564 | if ((maskbit & ifm->ifm_addrs) == 0) | |
565 | continue; | |
566 | if (maskbit != RTA_IFP) { | |
567 | cp += rta_get(cp, NULL, 0); | |
568 | continue; | |
569 | } | |
570 | ||
571 | /* Save the pointer to the structure. */ | |
572 | sdl = (struct sockaddr_dl *)cp; | |
573 | cp += rta_getsdlname(cp, ifname, &ifnlen); | |
574 | } | |
d62a17ae | 575 | |
576 | if (IS_ZEBRA_DEBUG_KERNEL) | |
5b62211d RZ |
577 | zlog_debug("%s: sdl ifname %s addrs {%s}", __func__, |
578 | (ifnlen ? ifname : "(nil)"), | |
579 | rtatostr(ifm->ifm_addrs, fbuf, sizeof(fbuf))); | |
d62a17ae | 580 | |
581 | /* | |
582 | * Look up on ifindex first, because ifindices are the primary handle | |
583 | * for | |
584 | * interfaces across the user/kernel boundary, for most systems. (Some | |
585 | * messages, such as up/down status changes on NetBSD, do not include a | |
586 | * sockaddr_dl). | |
587 | */ | |
588 | if ((ifp = if_lookup_by_index(ifm->ifm_index, VRF_DEFAULT)) != NULL) { | |
589 | /* we have an ifp, verify that the name matches as some systems, | |
590 | * eg Solaris, have a 1:many association of ifindex:ifname | |
591 | * if they dont match, we dont have the correct ifp and should | |
592 | * set it back to NULL to let next check do lookup by name | |
593 | */ | |
594 | if (ifnlen && (strncmp(ifp->name, ifname, IFNAMSIZ) != 0)) { | |
595 | if (IS_ZEBRA_DEBUG_KERNEL) | |
596 | zlog_debug( | |
0437e105 | 597 | "%s: ifp name %s doesn't match sdl name %s", |
d62a17ae | 598 | __func__, ifp->name, ifname); |
599 | ifp = NULL; | |
600 | } | |
da26e3b6 | 601 | } |
5c78b3d0 | 602 | |
d62a17ae | 603 | /* |
604 | * If we dont have an ifp, try looking up by name. Particularly as some | |
605 | * systems (Solaris) have a 1:many mapping of ifindex:ifname - the | |
606 | * ifname | |
607 | * is therefore our unique handle to that interface. | |
608 | * | |
609 | * Interfaces specified in the configuration file for which the ifindex | |
610 | * has not been determined will have ifindex == IFINDEX_INTERNAL, and | |
611 | * such | |
612 | * interfaces are found by this search, and then their ifindex values | |
613 | * can | |
614 | * be filled in. | |
615 | */ | |
616 | if ((ifp == NULL) && ifnlen) | |
a36898e7 | 617 | ifp = if_lookup_by_name(ifname, VRF_DEFAULT); |
d62a17ae | 618 | |
619 | /* | |
620 | * If ifp still does not exist or has an invalid index | |
621 | * (IFINDEX_INTERNAL), | |
622 | * create or fill in an interface. | |
623 | */ | |
624 | if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) { | |
625 | /* | |
626 | * To create or fill in an interface, a sockaddr_dl (via | |
627 | * RTA_IFP) is required. | |
628 | */ | |
629 | if (!ifnlen) { | |
9165c5f5 | 630 | zlog_debug("Interface index %d (new) missing ifname", |
9df414fe | 631 | ifm->ifm_index); |
d62a17ae | 632 | return -1; |
633 | } | |
634 | ||
5c78b3d0 | 635 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 636 | /* Down->Down interface should be ignored here. |
637 | * See further comment below. | |
638 | */ | |
639 | if (!CHECK_FLAG(ifm->ifm_flags, IFF_UP)) | |
640 | return 0; | |
5c78b3d0 | 641 | #endif /* !RTM_IFANNOUNCE */ |
d62a17ae | 642 | |
643 | if (ifp == NULL) { | |
644 | /* Interface that zebra was not previously aware of, so | |
645 | * create. */ | |
a36898e7 | 646 | ifp = if_create(ifname, VRF_DEFAULT); |
d62a17ae | 647 | if (IS_ZEBRA_DEBUG_KERNEL) |
648 | zlog_debug("%s: creating ifp for ifindex %d", | |
649 | __func__, ifm->ifm_index); | |
650 | } | |
651 | ||
652 | if (IS_ZEBRA_DEBUG_KERNEL) | |
653 | zlog_debug( | |
654 | "%s: updated/created ifp, ifname %s, ifindex %d", | |
655 | __func__, ifp->name, ifp->ifindex); | |
656 | /* | |
657 | * Fill in newly created interface structure, or larval | |
658 | * structure with ifindex IFINDEX_INTERNAL. | |
659 | */ | |
ff880b78 | 660 | if_set_index(ifp, ifm->ifm_index); |
d62a17ae | 661 | |
9234b382 | 662 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 663 | bsd_linkdetect_translate(ifm); |
9234b382 | 664 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 665 | |
d62a17ae | 666 | if_flags_update(ifp, ifm->ifm_flags); |
718e3744 | 667 | #if defined(__bsdi__) |
d62a17ae | 668 | if_kvm_get_mtu(ifp); |
718e3744 | 669 | #else |
d62a17ae | 670 | if_get_mtu(ifp); |
718e3744 | 671 | #endif /* __bsdi__ */ |
d62a17ae | 672 | if_get_metric(ifp); |
673 | ||
674 | /* | |
675 | * XXX sockaddr_dl contents can be larger than the structure | |
676 | * definition. There are 2 big families here: | |
677 | * - BSD has sdl_len + sdl_data[16] + overruns sdl_data | |
678 | * we MUST use sdl_len here or we'll truncate data. | |
679 | * - Solaris has no sdl_len, but sdl_data[244] | |
680 | * presumably, it's not going to run past that, so sizeof() | |
681 | * is fine here. | |
86c57af5 | 682 | * a nonzero ifnlen from rta_getsdlname() means sdl is valid |
d62a17ae | 683 | */ |
684 | ifp->ll_type = ZEBRA_LLT_UNKNOWN; | |
685 | ifp->hw_addr_len = 0; | |
686 | if (ifnlen) { | |
ca3ccd87 | 687 | #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN |
d62a17ae | 688 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
689 | sdl->sdl_len); | |
ca3ccd87 | 690 | #else |
d62a17ae | 691 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
692 | sizeof(struct sockaddr_dl)); | |
ca3ccd87 | 693 | #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */ |
8ccc7e80 | 694 | |
d62a17ae | 695 | ifp->ll_type = sdl_to_zebra_link_type(sdl->sdl_type); |
696 | if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) { | |
697 | memcpy(ifp->hw_addr, LLADDR(sdl), | |
698 | sdl->sdl_alen); | |
699 | ifp->hw_addr_len = sdl->sdl_alen; | |
700 | } | |
701 | } | |
702 | ||
703 | if_add_update(ifp); | |
704 | } else | |
705 | /* | |
706 | * Interface structure exists. Adjust stored flags from | |
707 | * notification. If interface has up->down or down->up | |
708 | * transition, call state change routines (to adjust routes, | |
709 | * notify routing daemons, etc.). (Other flag changes are stored | |
710 | * but apparently do not trigger action.) | |
711 | */ | |
712 | { | |
713 | if (ifp->ifindex != ifm->ifm_index) { | |
9df414fe | 714 | zlog_debug( |
d62a17ae | 715 | "%s: index mismatch, ifname %s, ifp index %d, " |
716 | "ifm index %d", | |
717 | __func__, ifp->name, ifp->ifindex, | |
718 | ifm->ifm_index); | |
719 | return -1; | |
720 | } | |
721 | ||
9234b382 | 722 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 723 | bsd_linkdetect_translate(ifm); |
9234b382 | 724 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 725 | |
d62a17ae | 726 | /* update flags and handle operative->inoperative transition, if |
727 | * any */ | |
728 | if_flags_update(ifp, ifm->ifm_flags); | |
729 | ||
6eb8827d | 730 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 731 | if (!if_is_up(ifp)) { |
732 | /* No RTM_IFANNOUNCE on this platform, so we can never | |
733 | * distinguish between ~IFF_UP and delete. We must | |
734 | * presume | |
735 | * it has been deleted. | |
736 | * Eg, Solaris will not notify us of unplumb. | |
737 | * | |
738 | * XXX: Fixme - this should be runtime detected | |
739 | * So that a binary compiled on a system with IFANNOUNCE | |
740 | * will still behave correctly if run on a platform | |
741 | * without | |
742 | */ | |
743 | if_delete_update(ifp); | |
744 | } | |
6eb8827d | 745 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 746 | if (if_is_up(ifp)) { |
1ba27564 | 747 | #if defined(__bsdi__) |
d62a17ae | 748 | if_kvm_get_mtu(ifp); |
1ba27564 | 749 | #else |
d62a17ae | 750 | if_get_mtu(ifp); |
1ba27564 | 751 | #endif /* __bsdi__ */ |
d62a17ae | 752 | if_get_metric(ifp); |
753 | } | |
754 | } | |
5c78b3d0 | 755 | |
718e3744 | 756 | #ifdef HAVE_NET_RT_IFLIST |
d62a17ae | 757 | ifp->stats = ifm->ifm_data; |
718e3744 | 758 | #endif /* HAVE_NET_RT_IFLIST */ |
04427fcb | 759 | ifp->speed = ifm->ifm_data.ifi_baudrate / 1000000; |
718e3744 | 760 | |
d62a17ae | 761 | if (IS_ZEBRA_DEBUG_KERNEL) |
762 | zlog_debug("%s: interface %s index %d", __func__, ifp->name, | |
763 | ifp->ifindex); | |
718e3744 | 764 | |
d62a17ae | 765 | return 0; |
718e3744 | 766 | } |
6b0655a2 | 767 | |
718e3744 | 768 | /* Address read from struct ifa_msghdr. */ |
d62a17ae | 769 | static void ifam_read_mesg(struct ifa_msghdr *ifm, union sockunion *addr, |
770 | union sockunion *mask, union sockunion *brd, | |
771 | char *ifname, short *ifnlen) | |
718e3744 | 772 | { |
d62a17ae | 773 | caddr_t pnt, end; |
774 | union sockunion dst; | |
775 | union sockunion gateway; | |
86c57af5 | 776 | int maskbit; |
5b62211d | 777 | char fbuf[64]; |
d62a17ae | 778 | |
779 | pnt = (caddr_t)(ifm + 1); | |
780 | end = ((caddr_t)ifm) + ifm->ifam_msglen; | |
781 | ||
782 | /* Be sure structure is cleared */ | |
783 | memset(mask, 0, sizeof(union sockunion)); | |
784 | memset(addr, 0, sizeof(union sockunion)); | |
785 | memset(brd, 0, sizeof(union sockunion)); | |
786 | memset(&dst, 0, sizeof(union sockunion)); | |
787 | memset(&gateway, 0, sizeof(union sockunion)); | |
788 | ||
789 | /* We fetch each socket variable into sockunion. */ | |
86c57af5 RZ |
790 | for (maskbit = 1; maskbit; maskbit <<= 1) { |
791 | if ((maskbit & ifm->ifam_addrs) == 0) | |
792 | continue; | |
793 | ||
794 | switch (maskbit) { | |
795 | case RTA_DST: | |
796 | pnt += rta_get(pnt, &dst, sizeof(dst)); | |
797 | break; | |
798 | case RTA_GATEWAY: | |
799 | pnt += rta_get(pnt, &gateway, sizeof(gateway)); | |
800 | break; | |
801 | case RTA_NETMASK: | |
19fb538d | 802 | pnt += rta_getattr(pnt, mask, sizeof(*mask)); |
86c57af5 RZ |
803 | break; |
804 | case RTA_IFP: | |
805 | pnt += rta_getsdlname(pnt, ifname, ifnlen); | |
806 | break; | |
807 | case RTA_IFA: | |
808 | pnt += rta_get(pnt, addr, sizeof(*addr)); | |
809 | break; | |
810 | case RTA_BRD: | |
811 | pnt += rta_get(pnt, brd, sizeof(*brd)); | |
812 | break; | |
813 | ||
814 | default: | |
815 | pnt += rta_get(pnt, NULL, 0); | |
816 | break; | |
817 | } | |
818 | ||
819 | if (pnt > end) { | |
820 | zlog_warn("%s: overflow detected (pnt:%p end:%p)", | |
821 | __func__, pnt, end); | |
822 | break; | |
823 | } | |
824 | } | |
d62a17ae | 825 | |
826 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
7053cae4 | 827 | switch (sockunion_family(addr)) { |
d62a17ae | 828 | case AF_INET: |
829 | case AF_INET6: { | |
830 | char buf[4][INET6_ADDRSTRLEN]; | |
7053cae4 RZ |
831 | int masklen = |
832 | (sockunion_family(addr) == AF_INET) | |
833 | ? ip_masklen(mask->sin.sin_addr) | |
834 | : ip6_masklen(mask->sin6.sin6_addr); | |
d62a17ae | 835 | zlog_debug( |
5b62211d | 836 | "%s: ifindex %d, ifname %s, ifam_addrs {%s}, " |
d62a17ae | 837 | "ifam_flags 0x%x, addr %s/%d broad %s dst %s " |
838 | "gateway %s", | |
839 | __func__, ifm->ifam_index, | |
5b62211d RZ |
840 | (ifnlen ? ifname : "(nil)"), |
841 | rtatostr(ifm->ifam_addrs, fbuf, sizeof(fbuf)), | |
d62a17ae | 842 | ifm->ifam_flags, |
7053cae4 RZ |
843 | sockunion2str(addr, buf[0], sizeof(buf[0])), |
844 | masklen, | |
845 | sockunion2str(brd, buf[1], sizeof(buf[1])), | |
846 | sockunion2str(&dst, buf[2], sizeof(buf[2])), | |
847 | sockunion2str(&gateway, buf[2], | |
848 | sizeof(buf[2]))); | |
d62a17ae | 849 | } break; |
850 | default: | |
5b62211d | 851 | zlog_debug("%s: ifindex %d, ifname %s, ifam_addrs {%s}", |
d62a17ae | 852 | __func__, ifm->ifam_index, |
853 | (ifnlen ? ifname : "(nil)"), | |
5b62211d RZ |
854 | rtatostr(ifm->ifam_addrs, fbuf, |
855 | sizeof(fbuf))); | |
d62a17ae | 856 | break; |
857 | } | |
858 | } | |
859 | ||
860 | /* Assert read up end point matches to end point */ | |
86c57af5 | 861 | pnt = (caddr_t)ROUNDUP((size_t)pnt); |
2d100aa5 | 862 | if (pnt != (caddr_t)ROUNDUP((size_t)end)) |
9df414fe | 863 | zlog_debug("ifam_read() doesn't read all socket data"); |
718e3744 | 864 | } |
865 | ||
866 | /* Interface's address information get. */ | |
d62a17ae | 867 | int ifam_read(struct ifa_msghdr *ifam) |
718e3744 | 868 | { |
d62a17ae | 869 | struct interface *ifp = NULL; |
870 | union sockunion addr, mask, brd; | |
871 | char ifname[INTERFACE_NAMSIZ]; | |
872 | short ifnlen = 0; | |
873 | char isalias = 0; | |
874 | int flags = 0; | |
875 | ||
876 | ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; | |
877 | ||
878 | /* Allocate and read address information. */ | |
879 | ifam_read_mesg(ifam, &addr, &mask, &brd, ifname, &ifnlen); | |
880 | ||
881 | if ((ifp = if_lookup_by_index(ifam->ifam_index, VRF_DEFAULT)) == NULL) { | |
e914ccbe | 882 | flog_warn(EC_ZEBRA_UNKNOWN_INTERFACE, |
9df414fe | 883 | "%s: no interface for ifname %s, index %d", __func__, |
d62a17ae | 884 | ifname, ifam->ifam_index); |
885 | return -1; | |
886 | } | |
887 | ||
888 | if (ifnlen && strncmp(ifp->name, ifname, INTERFACE_NAMSIZ)) | |
889 | isalias = 1; | |
890 | ||
891 | /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD | |
892 | field contains a broadcast address or a peer address, so we are | |
893 | forced to | |
894 | rely upon the interface type. */ | |
895 | if (if_is_pointopoint(ifp)) | |
896 | SET_FLAG(flags, ZEBRA_IFA_PEER); | |
7ab62c53 | 897 | |
6502208c PJ |
898 | #if 0 |
899 | /* it might seem cute to grab the interface metric here, however | |
900 | * we're processing an address update message, and so some systems | |
901 | * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left | |
902 | * in deliberately, as comment. | |
903 | */ | |
d34b8991 | 904 | ifp->metric = ifam->ifam_metric; |
6502208c PJ |
905 | #endif |
906 | ||
d62a17ae | 907 | /* Add connected address. */ |
908 | switch (sockunion_family(&addr)) { | |
909 | case AF_INET: | |
910 | if (ifam->ifam_type == RTM_NEWADDR) | |
911 | connected_add_ipv4(ifp, flags, &addr.sin.sin_addr, | |
912 | ip_masklen(mask.sin.sin_addr), | |
913 | &brd.sin.sin_addr, | |
cde1af84 AK |
914 | (isalias ? ifname : NULL), |
915 | METRIC_MAX); | |
d62a17ae | 916 | else |
917 | connected_delete_ipv4(ifp, flags, &addr.sin.sin_addr, | |
918 | ip_masklen(mask.sin.sin_addr), | |
919 | &brd.sin.sin_addr); | |
920 | break; | |
921 | case AF_INET6: | |
922 | /* Unset interface index from link-local address when IPv6 stack | |
923 | is KAME. */ | |
924 | if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6.sin6_addr)) { | |
925 | SET_IN6_LINKLOCAL_IFINDEX(addr.sin6.sin6_addr, 0); | |
926 | } | |
927 | ||
928 | if (ifam->ifam_type == RTM_NEWADDR) | |
929 | connected_add_ipv6(ifp, flags, &addr.sin6.sin6_addr, | |
60c0687a | 930 | NULL, |
d62a17ae | 931 | ip6_masklen(mask.sin6.sin6_addr), |
cde1af84 AK |
932 | (isalias ? ifname : NULL), |
933 | METRIC_MAX); | |
d62a17ae | 934 | else |
60c0687a | 935 | connected_delete_ipv6(ifp, &addr.sin6.sin6_addr, NULL, |
608105a7 | 936 | ip6_masklen(mask.sin6.sin6_addr)); |
d62a17ae | 937 | break; |
938 | default: | |
939 | /* Unsupported family silently ignore... */ | |
940 | break; | |
941 | } | |
942 | ||
943 | /* Check interface flag for implicit up of the interface. */ | |
944 | if_refresh(ifp); | |
5c78b3d0 | 945 | |
946 | #ifdef SUNOS_5 | |
d62a17ae | 947 | /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange. |
948 | * See comments for SUNOS_5 in interface.c::if_flags_mangle. | |
949 | * | |
950 | * Here we take care of case where the real IFF_UP was previously | |
951 | * unset (as kept in struct zebra_if.primary_state) and the mangled | |
952 | * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned | |
953 | * to unset due to the lost non-primary address having DELADDR'd. | |
954 | * | |
955 | * we must delete the interface, because in between here and next | |
956 | * event for this interface-name the administrator could unplumb | |
957 | * and replumb the interface. | |
958 | */ | |
959 | if (!if_is_up(ifp)) | |
960 | if_delete_update(ifp); | |
5c78b3d0 | 961 | #endif /* SUNOS_5 */ |
d62a17ae | 962 | |
963 | return 0; | |
718e3744 | 964 | } |
6b0655a2 | 965 | |
718e3744 | 966 | /* Interface function for reading kernel routing table information. */ |
d62a17ae | 967 | static int rtm_read_mesg(struct rt_msghdr *rtm, union sockunion *dest, |
968 | union sockunion *mask, union sockunion *gate, | |
969 | char *ifname, short *ifnlen) | |
718e3744 | 970 | { |
d62a17ae | 971 | caddr_t pnt, end; |
86c57af5 | 972 | int maskbit; |
d62a17ae | 973 | |
974 | /* Pnt points out socket data start point. */ | |
975 | pnt = (caddr_t)(rtm + 1); | |
976 | end = ((caddr_t)rtm) + rtm->rtm_msglen; | |
977 | ||
978 | /* rt_msghdr version check. */ | |
979 | if (rtm->rtm_version != RTM_VERSION) | |
e914ccbe | 980 | flog_warn(EC_ZEBRA_RTM_VERSION_MISMATCH, |
9df414fe QY |
981 | "Routing message version different %d should be %d." |
982 | "This may cause problem\n", | |
983 | rtm->rtm_version, RTM_VERSION); | |
d62a17ae | 984 | |
985 | /* Be sure structure is cleared */ | |
986 | memset(dest, 0, sizeof(union sockunion)); | |
987 | memset(gate, 0, sizeof(union sockunion)); | |
988 | memset(mask, 0, sizeof(union sockunion)); | |
989 | ||
990 | /* We fetch each socket variable into sockunion. */ | |
86c57af5 RZ |
991 | /* We fetch each socket variable into sockunion. */ |
992 | for (maskbit = 1; maskbit; maskbit <<= 1) { | |
993 | if ((maskbit & rtm->rtm_addrs) == 0) | |
994 | continue; | |
995 | ||
996 | switch (maskbit) { | |
997 | case RTA_DST: | |
998 | pnt += rta_get(pnt, dest, sizeof(*dest)); | |
999 | break; | |
1000 | case RTA_GATEWAY: | |
1001 | pnt += rta_get(pnt, gate, sizeof(*gate)); | |
1002 | break; | |
1003 | case RTA_NETMASK: | |
1583f8f5 | 1004 | pnt += rta_getattr(pnt, mask, sizeof(*mask)); |
86c57af5 RZ |
1005 | break; |
1006 | case RTA_IFP: | |
1007 | pnt += rta_getsdlname(pnt, ifname, ifnlen); | |
1008 | break; | |
1009 | ||
1010 | default: | |
1011 | pnt += rta_get(pnt, NULL, 0); | |
1012 | break; | |
1013 | } | |
1014 | ||
1015 | if (pnt > end) { | |
1016 | zlog_warn("%s: overflow detected (pnt:%p end:%p)", | |
1017 | __func__, pnt, end); | |
1018 | break; | |
1019 | } | |
1020 | } | |
d62a17ae | 1021 | |
1022 | /* If there is netmask information set it's family same as | |
1023 | destination family*/ | |
1024 | if (rtm->rtm_addrs & RTA_NETMASK) | |
1025 | mask->sa.sa_family = dest->sa.sa_family; | |
1026 | ||
1027 | /* Assert read up to the end of pointer. */ | |
1028 | if (pnt != end) | |
9df414fe | 1029 | zlog_debug("rtm_read() doesn't read all socket data."); |
d62a17ae | 1030 | |
1031 | return rtm->rtm_flags; | |
718e3744 | 1032 | } |
1033 | ||
d62a17ae | 1034 | void rtm_read(struct rt_msghdr *rtm) |
718e3744 | 1035 | { |
d62a17ae | 1036 | int flags; |
d7c0a89a | 1037 | uint8_t zebra_flags; |
d62a17ae | 1038 | union sockunion dest, mask, gate; |
1039 | char ifname[INTERFACE_NAMSIZ + 1]; | |
1040 | short ifnlen = 0; | |
fd36be7e | 1041 | struct nexthop nh; |
026745a2 DS |
1042 | struct prefix p; |
1043 | ifindex_t ifindex = 0; | |
1044 | afi_t afi; | |
5b62211d | 1045 | char fbuf[64]; |
d62a17ae | 1046 | |
1047 | zebra_flags = 0; | |
1048 | ||
1049 | /* Read destination and netmask and gateway from rtm message | |
1050 | structure. */ | |
1051 | flags = rtm_read_mesg(rtm, &dest, &mask, &gate, ifname, &ifnlen); | |
1052 | if (!(flags & RTF_DONE)) | |
1053 | return; | |
1054 | if (IS_ZEBRA_DEBUG_KERNEL) | |
5b62211d | 1055 | zlog_debug("%s: got rtm of type %d (%s) addrs {%s}", __func__, |
d62a17ae | 1056 | rtm->rtm_type, |
5b62211d RZ |
1057 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL), |
1058 | rtatostr(rtm->rtm_addrs, fbuf, sizeof(fbuf))); | |
d62a17ae | 1059 | |
1060 | #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ | |
1061 | if (flags & RTF_CLONED) | |
1062 | return; | |
718e3744 | 1063 | #endif |
d62a17ae | 1064 | #ifdef RTF_WASCLONED /*freebsd*/ |
1065 | if (flags & RTF_WASCLONED) | |
1066 | return; | |
718e3744 | 1067 | #endif |
1068 | ||
d62a17ae | 1069 | if ((rtm->rtm_type == RTM_ADD || rtm->rtm_type == RTM_CHANGE) |
1070 | && !(flags & RTF_UP)) | |
1071 | return; | |
1072 | ||
1073 | /* This is connected route. */ | |
1074 | if (!(flags & RTF_GATEWAY)) | |
1075 | return; | |
1076 | ||
1077 | if (flags & RTF_PROTO1) | |
1078 | SET_FLAG(zebra_flags, ZEBRA_FLAG_SELFROUTE); | |
1079 | ||
a8309422 | 1080 | memset(&nh, 0, sizeof(nh)); |
4a7371e9 DS |
1081 | |
1082 | nh.vrf_id = VRF_DEFAULT; | |
d62a17ae | 1083 | /* This is a reject or blackhole route */ |
a8309422 DL |
1084 | if (flags & RTF_REJECT) { |
1085 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
1086 | nh.bh_type = BLACKHOLE_REJECT; | |
1087 | } else if (flags & RTF_BLACKHOLE) { | |
1088 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
1089 | nh.bh_type = BLACKHOLE_NULL; | |
1090 | } | |
d62a17ae | 1091 | |
c626d369 DS |
1092 | /* |
1093 | * Ignore our own messages. | |
1094 | */ | |
1095 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) | |
1096 | return; | |
d62a17ae | 1097 | |
d62a17ae | 1098 | if (dest.sa.sa_family == AF_INET) { |
026745a2 | 1099 | afi = AFI_IP; |
d62a17ae | 1100 | p.family = AF_INET; |
1101 | p.u.prefix4 = dest.sin.sin_addr; | |
1102 | if (flags & RTF_HOST) | |
1103 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
1104 | else | |
1105 | p.prefixlen = ip_masklen(mask.sin.sin_addr); | |
1106 | ||
a8309422 DL |
1107 | if (!nh.type) { |
1108 | nh.type = NEXTHOP_TYPE_IPV4; | |
1109 | nh.gate.ipv4 = gate.sin.sin_addr; | |
1110 | } | |
026745a2 DS |
1111 | } else if (dest.sa.sa_family == AF_INET6) { |
1112 | afi = AFI_IP6; | |
d62a17ae | 1113 | p.family = AF_INET6; |
1114 | p.u.prefix6 = dest.sin6.sin6_addr; | |
1115 | if (flags & RTF_HOST) | |
1116 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1117 | else | |
1118 | p.prefixlen = ip6_masklen(mask.sin6.sin6_addr); | |
718e3744 | 1119 | |
1120 | #ifdef KAME | |
d62a17ae | 1121 | if (IN6_IS_ADDR_LINKLOCAL(&gate.sin6.sin6_addr)) { |
1122 | ifindex = IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr); | |
1123 | SET_IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr, 0); | |
1124 | } | |
718e3744 | 1125 | #endif /* KAME */ |
1126 | ||
a8309422 DL |
1127 | if (!nh.type) { |
1128 | nh.type = ifindex ? NEXTHOP_TYPE_IPV6_IFINDEX | |
1129 | : NEXTHOP_TYPE_IPV6; | |
1130 | nh.gate.ipv6 = gate.sin6.sin6_addr; | |
1131 | nh.ifindex = ifindex; | |
1132 | } | |
026745a2 DS |
1133 | } else |
1134 | return; | |
d62a17ae | 1135 | |
026745a2 DS |
1136 | /* |
1137 | * CHANGE: delete the old prefix, we have no further information | |
1138 | * to specify the route really | |
1139 | */ | |
1140 | if (rtm->rtm_type == RTM_CHANGE) | |
1141 | rib_delete(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, | |
56e78254 DS |
1142 | 0, zebra_flags, &p, NULL, NULL, RT_TABLE_MAIN, |
1143 | 0, 0, true); | |
026745a2 DS |
1144 | if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD |
1145 | || rtm->rtm_type == RTM_CHANGE) | |
1146 | rib_add(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0, | |
56e78254 | 1147 | zebra_flags, &p, NULL, &nh, RT_TABLE_MAIN, 0, 0, 0, 0); |
026745a2 DS |
1148 | else |
1149 | rib_delete(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, | |
56e78254 DS |
1150 | 0, zebra_flags, &p, NULL, &nh, RT_TABLE_MAIN, |
1151 | 0, 0, true); | |
718e3744 | 1152 | } |
1153 | ||
1154 | /* Interface function for the kernel routing table updates. Support | |
6621ca86 | 1155 | * for RTM_CHANGE will be needed. |
1156 | * Exported only for rt_socket.c | |
1157 | */ | |
d62a17ae | 1158 | int rtm_write(int message, union sockunion *dest, union sockunion *mask, |
1159 | union sockunion *gate, union sockunion *mpls, unsigned int index, | |
a8309422 | 1160 | enum blackhole_type bh_type, int metric) |
718e3744 | 1161 | { |
d62a17ae | 1162 | int ret; |
1163 | caddr_t pnt; | |
1164 | struct interface *ifp; | |
1165 | ||
1166 | /* Sequencial number of routing message. */ | |
1167 | static int msg_seq = 0; | |
1168 | ||
1169 | /* Struct of rt_msghdr and buffer for storing socket's data. */ | |
1170 | struct { | |
1171 | struct rt_msghdr rtm; | |
1172 | char buf[512]; | |
1173 | } msg; | |
1174 | ||
80776aec | 1175 | if (dplane_routing_sock < 0) |
d62a17ae | 1176 | return ZEBRA_ERR_EPERM; |
1177 | ||
1178 | /* Clear and set rt_msghdr values */ | |
1179 | memset(&msg, 0, sizeof(struct rt_msghdr)); | |
1180 | msg.rtm.rtm_version = RTM_VERSION; | |
1181 | msg.rtm.rtm_type = message; | |
1182 | msg.rtm.rtm_seq = msg_seq++; | |
1183 | msg.rtm.rtm_addrs = RTA_DST; | |
1184 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
1185 | msg.rtm.rtm_flags = RTF_UP; | |
fe6c7157 | 1186 | #ifdef __OpenBSD__ |
d62a17ae | 1187 | msg.rtm.rtm_flags |= RTF_MPATH; |
1188 | msg.rtm.rtm_fmask = RTF_MPLS; | |
d3e2c74a | 1189 | #endif |
d62a17ae | 1190 | msg.rtm.rtm_index = index; |
718e3744 | 1191 | |
d62a17ae | 1192 | if (metric != 0) { |
1193 | msg.rtm.rtm_rmx.rmx_hopcount = metric; | |
1194 | msg.rtm.rtm_inits |= RTV_HOPCOUNT; | |
1195 | } | |
718e3744 | 1196 | |
d62a17ae | 1197 | ifp = if_lookup_by_index(index, VRF_DEFAULT); |
718e3744 | 1198 | |
d62a17ae | 1199 | if (gate && (message == RTM_ADD || message == RTM_CHANGE)) |
1200 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
718e3744 | 1201 | |
d62a17ae | 1202 | /* When RTF_CLONING is unavailable on BSD, should we set some |
1203 | * other flag instead? | |
1204 | */ | |
e6f148e6 | 1205 | #ifdef RTF_CLONING |
d62a17ae | 1206 | if (!gate && (message == RTM_ADD || message == RTM_CHANGE) && ifp |
1207 | && (ifp->flags & IFF_POINTOPOINT) == 0) | |
1208 | msg.rtm.rtm_flags |= RTF_CLONING; | |
e6f148e6 | 1209 | #endif /* RTF_CLONING */ |
718e3744 | 1210 | |
d62a17ae | 1211 | /* If no protocol specific gateway is specified, use link |
1212 | address for gateway. */ | |
1213 | if (!gate) { | |
1214 | if (!ifp) { | |
1215 | char dest_buf[INET_ADDRSTRLEN] = "NULL", | |
1216 | mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; | |
1217 | if (dest) | |
1218 | inet_ntop(AF_INET, &dest->sin.sin_addr, | |
1219 | dest_buf, INET_ADDRSTRLEN); | |
1220 | if (mask) | |
1221 | inet_ntop(AF_INET, &mask->sin.sin_addr, | |
1222 | mask_buf, INET_ADDRSTRLEN); | |
9df414fe | 1223 | flog_warn( |
e914ccbe | 1224 | EC_ZEBRA_RTM_NO_GATEWAY, |
d62a17ae | 1225 | "%s: %s/%s: gate == NULL and no gateway found for ifindex %d", |
1226 | __func__, dest_buf, mask_buf, index); | |
1227 | return -1; | |
1228 | } | |
1229 | gate = (union sockunion *)&((struct zebra_if *)ifp->info)->sdl; | |
1230 | } | |
1231 | ||
1232 | if (mask) | |
1233 | msg.rtm.rtm_addrs |= RTA_NETMASK; | |
1234 | else if (message == RTM_ADD || message == RTM_CHANGE) | |
1235 | msg.rtm.rtm_flags |= RTF_HOST; | |
718e3744 | 1236 | |
fe6c7157 | 1237 | #ifdef __OpenBSD__ |
d62a17ae | 1238 | if (mpls) { |
1239 | msg.rtm.rtm_addrs |= RTA_SRC; | |
1240 | msg.rtm.rtm_flags |= RTF_MPLS; | |
1241 | ||
1242 | if (mpls->smpls.smpls_label | |
70e98a7f | 1243 | != htonl(MPLS_LABEL_IMPLICIT_NULL << MPLS_LABEL_OFFSET)) |
d62a17ae | 1244 | msg.rtm.rtm_mpls = MPLS_OP_PUSH; |
1245 | } | |
d3e2c74a RW |
1246 | #endif |
1247 | ||
d62a17ae | 1248 | /* Tagging route with flags */ |
1249 | msg.rtm.rtm_flags |= (RTF_PROTO1); | |
718e3744 | 1250 | |
a8309422 DL |
1251 | switch (bh_type) { |
1252 | case BLACKHOLE_UNSPEC: | |
1253 | break; | |
1254 | case BLACKHOLE_REJECT: | |
d62a17ae | 1255 | msg.rtm.rtm_flags |= RTF_REJECT; |
a8309422 DL |
1256 | break; |
1257 | default: | |
1258 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
1259 | break; | |
1260 | } | |
81dfcaa2 | 1261 | |
718e3744 | 1262 | |
d62a17ae | 1263 | #define SOCKADDRSET(X, R) \ |
1264 | if (msg.rtm.rtm_addrs & (R)) { \ | |
1265 | int len = SAROUNDUP(X); \ | |
1266 | memcpy(pnt, (caddr_t)(X), len); \ | |
1267 | pnt += len; \ | |
1268 | } | |
718e3744 | 1269 | |
d62a17ae | 1270 | pnt = (caddr_t)msg.buf; |
718e3744 | 1271 | |
d62a17ae | 1272 | /* Write each socket data into rtm message buffer */ |
1273 | SOCKADDRSET(dest, RTA_DST); | |
1274 | SOCKADDRSET(gate, RTA_GATEWAY); | |
1275 | SOCKADDRSET(mask, RTA_NETMASK); | |
fe6c7157 | 1276 | #ifdef __OpenBSD__ |
d62a17ae | 1277 | SOCKADDRSET(mpls, RTA_SRC); |
d3e2c74a | 1278 | #endif |
718e3744 | 1279 | |
d62a17ae | 1280 | msg.rtm.rtm_msglen = pnt - (caddr_t)&msg; |
1281 | ||
80776aec | 1282 | ret = write(dplane_routing_sock, &msg, msg.rtm.rtm_msglen); |
d62a17ae | 1283 | |
1284 | if (ret != msg.rtm.rtm_msglen) { | |
1285 | if (errno == EEXIST) | |
1286 | return ZEBRA_ERR_RTEXIST; | |
1287 | if (errno == ENETUNREACH) | |
1288 | return ZEBRA_ERR_RTUNREACH; | |
1289 | if (errno == ESRCH) | |
1290 | return ZEBRA_ERR_RTNOEXIST; | |
1291 | ||
450971aa | 1292 | flog_err_sys(EC_LIB_SOCKET, "%s: write : %s (%d)", __func__, |
9df414fe | 1293 | safe_strerror(errno), errno); |
d62a17ae | 1294 | return ZEBRA_ERR_KERNEL; |
1295 | } | |
1296 | return ZEBRA_ERR_NOERROR; | |
718e3744 | 1297 | } |
1298 | ||
6b0655a2 | 1299 | |
718e3744 | 1300 | #include "thread.h" |
1301 | #include "zebra/zserv.h" | |
1302 | ||
718e3744 | 1303 | /* For debug purpose. */ |
d62a17ae | 1304 | static void rtmsg_debug(struct rt_msghdr *rtm) |
718e3744 | 1305 | { |
5b62211d RZ |
1306 | char fbuf[64]; |
1307 | ||
d62a17ae | 1308 | zlog_debug("Kernel: Len: %d Type: %s", rtm->rtm_msglen, |
1309 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); | |
1310 | rtm_flag_dump(rtm->rtm_flags); | |
1311 | zlog_debug("Kernel: message seq %d", rtm->rtm_seq); | |
5b62211d RZ |
1312 | zlog_debug("Kernel: pid %lld, rtm_addrs {%s}", (long long)rtm->rtm_pid, |
1313 | rtatostr(rtm->rtm_addrs, fbuf, sizeof(fbuf))); | |
718e3744 | 1314 | } |
1315 | ||
1316 | /* This is pretty gross, better suggestions welcome -- mhandler */ | |
1317 | #ifndef RTAX_MAX | |
1318 | #ifdef RTA_NUMBITS | |
1319 | #define RTAX_MAX RTA_NUMBITS | |
1320 | #else | |
1321 | #define RTAX_MAX 8 | |
1322 | #endif /* RTA_NUMBITS */ | |
1323 | #endif /* RTAX_MAX */ | |
1324 | ||
1325 | /* Kernel routing table and interface updates via routing socket. */ | |
d62a17ae | 1326 | static int kernel_read(struct thread *thread) |
718e3744 | 1327 | { |
d62a17ae | 1328 | int sock; |
1329 | int nbytes; | |
1330 | struct rt_msghdr *rtm; | |
1331 | ||
1332 | /* | |
1333 | * This must be big enough for any message the kernel might send. | |
1334 | * Rather than determining how many sockaddrs of what size might be | |
1335 | * in each particular message, just use RTAX_MAX of sockaddr_storage | |
1336 | * for each. Note that the sockaddrs must be after each message | |
1337 | * definition, or rather after whichever happens to be the largest, | |
1338 | * since the buffer needs to be big enough for a message and the | |
1339 | * sockaddrs together. | |
1340 | */ | |
1341 | union { | |
1342 | /* Routing information. */ | |
1343 | struct { | |
1344 | struct rt_msghdr rtm; | |
1345 | struct sockaddr_storage addr[RTAX_MAX]; | |
1346 | } r; | |
1347 | ||
1348 | /* Interface information. */ | |
1349 | struct { | |
1350 | struct if_msghdr ifm; | |
1351 | struct sockaddr_storage addr[RTAX_MAX]; | |
1352 | } im; | |
1353 | ||
1354 | /* Interface address information. */ | |
1355 | struct { | |
1356 | struct ifa_msghdr ifa; | |
1357 | struct sockaddr_storage addr[RTAX_MAX]; | |
1358 | } ia; | |
718e3744 | 1359 | |
1360 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 1361 | /* Interface arrival/departure */ |
1362 | struct { | |
1363 | struct if_announcemsghdr ifan; | |
1364 | struct sockaddr_storage addr[RTAX_MAX]; | |
1365 | } ian; | |
718e3744 | 1366 | #endif /* RTM_IFANNOUNCE */ |
1367 | ||
d62a17ae | 1368 | } buf; |
718e3744 | 1369 | |
d62a17ae | 1370 | /* Fetch routing socket. */ |
1371 | sock = THREAD_FD(thread); | |
718e3744 | 1372 | |
d62a17ae | 1373 | nbytes = read(sock, &buf, sizeof buf); |
718e3744 | 1374 | |
d62a17ae | 1375 | if (nbytes <= 0) { |
1376 | if (nbytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN) | |
450971aa | 1377 | flog_err_sys(EC_LIB_SOCKET, "routing socket error: %s", |
9df414fe | 1378 | safe_strerror(errno)); |
d62a17ae | 1379 | return 0; |
1380 | } | |
718e3744 | 1381 | |
3801e764 | 1382 | thread_add_read(zrouter.master, kernel_read, NULL, sock, NULL); |
718e3744 | 1383 | |
d62a17ae | 1384 | if (IS_ZEBRA_DEBUG_KERNEL) |
1385 | rtmsg_debug(&buf.r.rtm); | |
718e3744 | 1386 | |
d62a17ae | 1387 | rtm = &buf.r.rtm; |
718e3744 | 1388 | |
d62a17ae | 1389 | /* |
1390 | * Ensure that we didn't drop any data, so that processing routines | |
1391 | * can assume they have the whole message. | |
1392 | */ | |
1393 | if (rtm->rtm_msglen != nbytes) { | |
9df414fe | 1394 | zlog_debug( |
d62a17ae | 1395 | "kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n", |
1396 | rtm->rtm_msglen, nbytes, rtm->rtm_type); | |
1397 | return -1; | |
1398 | } | |
1399 | ||
1400 | switch (rtm->rtm_type) { | |
1401 | case RTM_ADD: | |
1402 | case RTM_DELETE: | |
1403 | case RTM_CHANGE: | |
1404 | rtm_read(rtm); | |
1405 | break; | |
1406 | case RTM_IFINFO: | |
1407 | ifm_read(&buf.im.ifm); | |
1408 | break; | |
1409 | case RTM_NEWADDR: | |
1410 | case RTM_DELADDR: | |
1411 | ifam_read(&buf.ia.ifa); | |
1412 | break; | |
718e3744 | 1413 | #ifdef RTM_IFANNOUNCE |
d62a17ae | 1414 | case RTM_IFANNOUNCE: |
1415 | ifan_read(&buf.ian.ifan); | |
1416 | break; | |
718e3744 | 1417 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 1418 | default: |
1419 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1420 | zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); | |
1421 | break; | |
1422 | } | |
1423 | return 0; | |
718e3744 | 1424 | } |
1425 | ||
1426 | /* Make routing socket. */ | |
d62a17ae | 1427 | static void routing_socket(struct zebra_ns *zns) |
718e3744 | 1428 | { |
6bb30c2c DL |
1429 | frr_elevate_privs(&zserv_privs) { |
1430 | routing_sock = ns_socket(AF_ROUTE, SOCK_RAW, 0, zns->ns_id); | |
80776aec MS |
1431 | |
1432 | dplane_routing_sock = | |
1433 | ns_socket(AF_ROUTE, SOCK_RAW, 0, zns->ns_id); | |
6bb30c2c | 1434 | } |
d62a17ae | 1435 | |
1436 | if (routing_sock < 0) { | |
1c50c1c0 | 1437 | flog_err_sys(EC_LIB_SOCKET, "Can't init kernel routing socket"); |
d62a17ae | 1438 | return; |
1439 | } | |
1440 | ||
80776aec MS |
1441 | if (dplane_routing_sock < 0) { |
1442 | flog_err_sys(EC_LIB_SOCKET, | |
1443 | "Can't init kernel dataplane routing socket"); | |
1444 | return; | |
1445 | } | |
1446 | ||
d62a17ae | 1447 | /* XXX: Socket should be NONBLOCK, however as we currently |
1448 | * discard failed writes, this will lead to inconsistencies. | |
1449 | * For now, socket must be blocking. | |
1450 | */ | |
1451 | /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) | |
1452 | zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ | |
1453 | ||
d62a17ae | 1454 | /* kernel_read needs rewrite. */ |
3801e764 | 1455 | thread_add_read(zrouter.master, kernel_read, NULL, routing_sock, NULL); |
718e3744 | 1456 | } |
1457 | ||
1458 | /* Exported interface function. This function simply calls | |
1459 | routing_socket (). */ | |
d62a17ae | 1460 | void kernel_init(struct zebra_ns *zns) |
8f7d9fc0 | 1461 | { |
d62a17ae | 1462 | routing_socket(zns); |
8f7d9fc0 FL |
1463 | } |
1464 | ||
62b8bb7a | 1465 | void kernel_terminate(struct zebra_ns *zns, bool complete) |
718e3744 | 1466 | { |
d62a17ae | 1467 | return; |
718e3744 | 1468 | } |
ddfeb486 DL |
1469 | |
1470 | #endif /* !HAVE_NETLINK */ |