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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 */ |
d62a17ae | 151 | {RTM_RESOLVE, "RTM_RESOLVE"}, |
152 | {RTM_NEWADDR, "RTM_NEWADDR"}, | |
153 | {RTM_DELADDR, "RTM_DELADDR"}, | |
154 | {RTM_IFINFO, "RTM_IFINFO"}, | |
718e3744 | 155 | #ifdef RTM_OIFINFO |
d62a17ae | 156 | {RTM_OIFINFO, "RTM_OIFINFO"}, |
718e3744 | 157 | #endif /* RTM_OIFINFO */ |
158 | #ifdef RTM_NEWMADDR | |
d62a17ae | 159 | {RTM_NEWMADDR, "RTM_NEWMADDR"}, |
718e3744 | 160 | #endif /* RTM_NEWMADDR */ |
161 | #ifdef RTM_DELMADDR | |
d62a17ae | 162 | {RTM_DELMADDR, "RTM_DELMADDR"}, |
718e3744 | 163 | #endif /* RTM_DELMADDR */ |
164 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 165 | {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, |
718e3744 | 166 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 167 | {0}}; |
168 | ||
169 | static const struct message rtm_flag_str[] = {{RTF_UP, "UP"}, | |
170 | {RTF_GATEWAY, "GATEWAY"}, | |
171 | {RTF_HOST, "HOST"}, | |
172 | {RTF_REJECT, "REJECT"}, | |
173 | {RTF_DYNAMIC, "DYNAMIC"}, | |
174 | {RTF_MODIFIED, "MODIFIED"}, | |
175 | {RTF_DONE, "DONE"}, | |
718e3744 | 176 | #ifdef RTF_MASK |
d62a17ae | 177 | {RTF_MASK, "MASK"}, |
718e3744 | 178 | #endif /* RTF_MASK */ |
e6f148e6 | 179 | #ifdef RTF_CLONING |
d62a17ae | 180 | {RTF_CLONING, "CLONING"}, |
e6f148e6 | 181 | #endif /* RTF_CLONING */ |
23b1f400 | 182 | #ifdef RTF_XRESOLVE |
d62a17ae | 183 | {RTF_XRESOLVE, "XRESOLVE"}, |
23b1f400 | 184 | #endif /* RTF_XRESOLVE */ |
c54632ec | 185 | #ifdef RTF_LLINFO |
d62a17ae | 186 | {RTF_LLINFO, "LLINFO"}, |
c54632ec | 187 | #endif /* RTF_LLINFO */ |
d62a17ae | 188 | {RTF_STATIC, "STATIC"}, |
189 | {RTF_BLACKHOLE, "BLACKHOLE"}, | |
6fe70d1b | 190 | #ifdef RTF_PRIVATE |
d62a17ae | 191 | {RTF_PRIVATE, "PRIVATE"}, |
6fe70d1b | 192 | #endif /* RTF_PRIVATE */ |
d62a17ae | 193 | {RTF_PROTO1, "PROTO1"}, |
194 | {RTF_PROTO2, "PROTO2"}, | |
718e3744 | 195 | #ifdef RTF_PRCLONING |
d62a17ae | 196 | {RTF_PRCLONING, "PRCLONING"}, |
718e3744 | 197 | #endif /* RTF_PRCLONING */ |
198 | #ifdef RTF_WASCLONED | |
d62a17ae | 199 | {RTF_WASCLONED, "WASCLONED"}, |
718e3744 | 200 | #endif /* RTF_WASCLONED */ |
201 | #ifdef RTF_PROTO3 | |
d62a17ae | 202 | {RTF_PROTO3, "PROTO3"}, |
718e3744 | 203 | #endif /* RTF_PROTO3 */ |
204 | #ifdef RTF_PINNED | |
d62a17ae | 205 | {RTF_PINNED, "PINNED"}, |
718e3744 | 206 | #endif /* RTF_PINNED */ |
207 | #ifdef RTF_LOCAL | |
d62a17ae | 208 | {RTF_LOCAL, "LOCAL"}, |
718e3744 | 209 | #endif /* RTF_LOCAL */ |
210 | #ifdef RTF_BROADCAST | |
d62a17ae | 211 | {RTF_BROADCAST, "BROADCAST"}, |
718e3744 | 212 | #endif /* RTF_BROADCAST */ |
213 | #ifdef RTF_MULTICAST | |
d62a17ae | 214 | {RTF_MULTICAST, "MULTICAST"}, |
718e3744 | 215 | #endif /* RTF_MULTICAST */ |
6fe70d1b | 216 | #ifdef RTF_MULTIRT |
d62a17ae | 217 | {RTF_MULTIRT, "MULTIRT"}, |
6fe70d1b | 218 | #endif /* RTF_MULTIRT */ |
219 | #ifdef RTF_SETSRC | |
d62a17ae | 220 | {RTF_SETSRC, "SETSRC"}, |
6fe70d1b | 221 | #endif /* RTF_SETSRC */ |
d62a17ae | 222 | {0}}; |
718e3744 | 223 | |
224 | /* Kernel routing update socket. */ | |
225 | int routing_sock = -1; | |
226 | ||
80776aec MS |
227 | /* Kernel dataplane routing update socket, used in the dataplane pthread |
228 | * context. | |
229 | */ | |
230 | int dplane_routing_sock = -1; | |
231 | ||
718e3744 | 232 | /* Yes I'm checking ugly routing socket behavior. */ |
233 | /* #define DEBUG */ | |
234 | ||
19fb538d | 235 | size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf); |
86c57af5 | 236 | size_t rta_get(caddr_t sap, void *dest, size_t destlen); |
19fb538d | 237 | size_t rta_getattr(caddr_t sap, void *destp, size_t destlen); |
86c57af5 | 238 | size_t rta_getsdlname(caddr_t sap, void *dest, short *destlen); |
5b62211d | 239 | const char *rtatostr(unsigned int flags, char *buf, size_t buflen); |
86c57af5 | 240 | |
718e3744 | 241 | /* Supported address family check. */ |
d62a17ae | 242 | static inline int af_check(int family) |
718e3744 | 243 | { |
d62a17ae | 244 | if (family == AF_INET) |
245 | return 1; | |
246 | if (family == AF_INET6) | |
247 | return 1; | |
248 | return 0; | |
718e3744 | 249 | } |
6b0655a2 | 250 | |
19fb538d | 251 | size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf) |
86c57af5 RZ |
252 | { |
253 | struct sockaddr *sa = (struct sockaddr *)sap; | |
75e710df | 254 | struct sockaddr_dl *sdl; |
86c57af5 RZ |
255 | uint8_t *dest = destp; |
256 | size_t tlen, copylen; | |
257 | ||
258 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
259 | copylen = sa->sa_len; | |
260 | tlen = (copylen == 0) ? sizeof(ROUNDUP_TYPE) : ROUNDUP(copylen); | |
261 | #else /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
262 | copylen = tlen = SAROUNDUP(sap); | |
263 | #endif /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
264 | ||
19fb538d RZ |
265 | if (copylen > 0 && dest != NULL) { |
266 | if (checkaf && af_check(sa->sa_family) == 0) | |
267 | return tlen; | |
75e710df RZ |
268 | /* |
269 | * Handle sockaddr_dl corner case: | |
270 | * RTA_NETMASK might be AF_LINK, but it doesn't anything | |
271 | * relevant (e.g. zeroed out fields). Check for this | |
272 | * case and avoid warning log message. | |
273 | */ | |
274 | if (sa->sa_family == AF_LINK) { | |
275 | sdl = (struct sockaddr_dl *)sa; | |
276 | if (sdl->sdl_index == 0 || sdl->sdl_nlen == 0) | |
e0f741f4 | 277 | copylen = destlen; |
75e710df | 278 | } |
19fb538d | 279 | |
86c57af5 RZ |
280 | if (copylen > destlen) { |
281 | zlog_warn("%s: destination buffer too small (%lu vs %lu)", | |
282 | __func__, copylen, destlen); | |
283 | memcpy(dest, sap, destlen); | |
284 | } else | |
285 | memcpy(dest, sap, copylen); | |
286 | } | |
287 | ||
288 | return tlen; | |
289 | } | |
290 | ||
19fb538d RZ |
291 | size_t rta_get(caddr_t sap, void *destp, size_t destlen) |
292 | { | |
293 | return _rta_get(sap, destp, destlen, true); | |
294 | } | |
295 | ||
296 | size_t rta_getattr(caddr_t sap, void *destp, size_t destlen) | |
297 | { | |
298 | return _rta_get(sap, destp, destlen, false); | |
299 | } | |
300 | ||
86c57af5 RZ |
301 | size_t rta_getsdlname(caddr_t sap, void *destp, short *destlen) |
302 | { | |
303 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)sap; | |
304 | struct sockaddr *sa = (struct sockaddr *)sap; | |
305 | uint8_t *dest = destp; | |
306 | size_t tlen, copylen; | |
307 | ||
308 | copylen = sdl->sdl_nlen; | |
309 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
310 | tlen = (sa->sa_len == 0) ? sizeof(ROUNDUP_TYPE) : ROUNDUP(sa->sa_len); | |
311 | #else /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
312 | tlen = SAROUNDUP(sap); | |
313 | #endif /* !HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
314 | ||
315 | if (copylen > 0 && dest != NULL && sdl->sdl_family == AF_LINK) { | |
316 | if (copylen > IFNAMSIZ) { | |
317 | zlog_warn("%s: destination buffer too small (%lu vs %d)", | |
318 | __func__, copylen, IFNAMSIZ); | |
319 | memcpy(dest, sdl->sdl_data, IFNAMSIZ); | |
320 | dest[IFNAMSIZ] = 0; | |
321 | *destlen = IFNAMSIZ; | |
322 | } else { | |
323 | memcpy(dest, sdl->sdl_data, copylen); | |
324 | dest[copylen] = 0; | |
325 | *destlen = copylen; | |
326 | } | |
327 | } else | |
328 | *destlen = 0; | |
329 | ||
330 | return tlen; | |
331 | } | |
332 | ||
5b62211d RZ |
333 | const char *rtatostr(unsigned int flags, char *buf, size_t buflen) |
334 | { | |
335 | const char *flagstr, *bufstart; | |
336 | int bit, wlen; | |
337 | char ustr[32]; | |
338 | ||
339 | /* Hold the pointer to the buffer beginning. */ | |
340 | bufstart = buf; | |
341 | ||
342 | for (bit = 1; bit; bit <<= 1) { | |
343 | if ((flags & bit) == 0) | |
344 | continue; | |
345 | ||
346 | switch (bit) { | |
347 | case RTA_DST: | |
348 | flagstr = "DST"; | |
349 | break; | |
350 | case RTA_GATEWAY: | |
351 | flagstr = "GATEWAY"; | |
352 | break; | |
353 | case RTA_NETMASK: | |
354 | flagstr = "NETMASK"; | |
355 | break; | |
356 | #ifdef RTA_GENMASK | |
357 | case RTA_GENMASK: | |
358 | flagstr = "GENMASK"; | |
359 | break; | |
360 | #endif /* RTA_GENMASK */ | |
361 | case RTA_IFP: | |
362 | flagstr = "IFP"; | |
363 | break; | |
364 | case RTA_IFA: | |
365 | flagstr = "IFA"; | |
366 | break; | |
367 | #ifdef RTA_AUTHOR | |
368 | case RTA_AUTHOR: | |
369 | flagstr = "AUTHOR"; | |
370 | break; | |
371 | #endif /* RTA_AUTHOR */ | |
372 | case RTA_BRD: | |
373 | flagstr = "BRD"; | |
374 | break; | |
375 | #ifdef RTA_SRC | |
376 | case RTA_SRC: | |
377 | flagstr = "SRC"; | |
378 | break; | |
379 | #endif /* RTA_SRC */ | |
380 | #ifdef RTA_SRCMASK | |
381 | case RTA_SRCMASK: | |
382 | flagstr = "SRCMASK"; | |
383 | break; | |
384 | #endif /* RTA_SRCMASK */ | |
385 | #ifdef RTA_LABEL | |
386 | case RTA_LABEL: | |
387 | flagstr = "LABEL"; | |
388 | break; | |
389 | #endif /* RTA_LABEL */ | |
390 | ||
391 | default: | |
392 | snprintf(ustr, sizeof(ustr), "0x%x", bit); | |
393 | flagstr = ustr; | |
394 | break; | |
395 | } | |
396 | ||
397 | wlen = snprintf(buf, buflen, "%s,", flagstr); | |
398 | buf += wlen; | |
399 | buflen -= wlen; | |
400 | } | |
401 | ||
402 | /* Check for empty buffer. */ | |
403 | if (bufstart != buf) | |
404 | buf--; | |
405 | ||
406 | /* Remove the last comma. */ | |
407 | *buf = 0; | |
408 | ||
409 | return bufstart; | |
410 | } | |
411 | ||
718e3744 | 412 | /* Dump routing table flag for debug purpose. */ |
d62a17ae | 413 | static void rtm_flag_dump(int flag) |
718e3744 | 414 | { |
d62a17ae | 415 | const struct message *mes; |
416 | static char buf[BUFSIZ]; | |
417 | ||
418 | buf[0] = '\0'; | |
419 | for (mes = rtm_flag_str; mes->key != 0; mes++) { | |
420 | if (mes->key & flag) { | |
421 | strlcat(buf, mes->str, BUFSIZ); | |
422 | strlcat(buf, " ", BUFSIZ); | |
423 | } | |
718e3744 | 424 | } |
d62a17ae | 425 | zlog_debug("Kernel: %s", buf); |
718e3744 | 426 | } |
427 | ||
428 | #ifdef RTM_IFANNOUNCE | |
429 | /* Interface adding function */ | |
d62a17ae | 430 | static int ifan_read(struct if_announcemsghdr *ifan) |
718e3744 | 431 | { |
d62a17ae | 432 | struct interface *ifp; |
433 | ||
434 | ifp = if_lookup_by_index(ifan->ifan_index, VRF_DEFAULT); | |
435 | ||
436 | if (ifp) | |
437 | assert((ifp->ifindex == ifan->ifan_index) | |
438 | || (ifp->ifindex == IFINDEX_INTERNAL)); | |
439 | ||
9d303b37 DL |
440 | if ((ifp == NULL) || ((ifp->ifindex == IFINDEX_INTERNAL) |
441 | && (ifan->ifan_what == IFAN_ARRIVAL))) { | |
d62a17ae | 442 | if (IS_ZEBRA_DEBUG_KERNEL) |
443 | zlog_debug( | |
444 | "%s: creating interface for ifindex %d, name %s", | |
445 | __func__, ifan->ifan_index, ifan->ifan_name); | |
446 | ||
447 | /* Create Interface */ | |
8f90d89b | 448 | ifp = if_get_by_name(ifan->ifan_name, VRF_DEFAULT); |
ff880b78 | 449 | if_set_index(ifp, ifan->ifan_index); |
d62a17ae | 450 | |
451 | if_get_metric(ifp); | |
452 | if_add_update(ifp); | |
453 | } else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) | |
454 | if_delete_update(ifp); | |
455 | ||
456 | if_get_flags(ifp); | |
457 | if_get_mtu(ifp); | |
458 | if_get_metric(ifp); | |
459 | ||
460 | if (IS_ZEBRA_DEBUG_KERNEL) | |
461 | zlog_debug("%s: interface %s index %d", __func__, | |
462 | ifan->ifan_name, ifan->ifan_index); | |
463 | ||
464 | return 0; | |
718e3744 | 465 | } |
466 | #endif /* RTM_IFANNOUNCE */ | |
467 | ||
9234b382 | 468 | #ifdef HAVE_BSD_IFI_LINK_STATE |
c543a173 | 469 | /* BSD link detect translation */ |
d62a17ae | 470 | static void bsd_linkdetect_translate(struct if_msghdr *ifm) |
c543a173 | 471 | { |
d62a17ae | 472 | if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) |
473 | || (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) | |
474 | SET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
475 | else | |
476 | UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
c543a173 | 477 | } |
9234b382 | 478 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 479 | |
d62a17ae | 480 | static enum zebra_link_type sdl_to_zebra_link_type(unsigned int sdlt) |
8ccc7e80 | 481 | { |
d62a17ae | 482 | switch (sdlt) { |
483 | case IFT_ETHER: | |
484 | return ZEBRA_LLT_ETHER; | |
485 | case IFT_X25: | |
486 | return ZEBRA_LLT_X25; | |
487 | case IFT_FDDI: | |
488 | return ZEBRA_LLT_FDDI; | |
489 | case IFT_PPP: | |
490 | return ZEBRA_LLT_PPP; | |
491 | case IFT_LOOP: | |
492 | return ZEBRA_LLT_LOOPBACK; | |
493 | case IFT_SLIP: | |
494 | return ZEBRA_LLT_SLIP; | |
495 | case IFT_ARCNET: | |
496 | return ZEBRA_LLT_ARCNET; | |
497 | case IFT_ATM: | |
498 | return ZEBRA_LLT_ATM; | |
499 | case IFT_LOCALTALK: | |
500 | return ZEBRA_LLT_LOCALTLK; | |
501 | case IFT_HIPPI: | |
502 | return ZEBRA_LLT_HIPPI; | |
8ccc7e80 | 503 | #ifdef IFT_IEEE1394 |
d62a17ae | 504 | case IFT_IEEE1394: |
505 | return ZEBRA_LLT_IEEE1394; | |
8ccc7e80 TT |
506 | #endif |
507 | ||
d62a17ae | 508 | default: |
509 | return ZEBRA_LLT_UNKNOWN; | |
510 | } | |
8ccc7e80 TT |
511 | } |
512 | ||
da26e3b6 | 513 | /* |
514 | * Handle struct if_msghdr obtained from reading routing socket or | |
515 | * sysctl (from interface_list). There may or may not be sockaddrs | |
516 | * present after the header. | |
517 | */ | |
d62a17ae | 518 | int ifm_read(struct if_msghdr *ifm) |
718e3744 | 519 | { |
d62a17ae | 520 | struct interface *ifp = NULL; |
521 | struct sockaddr_dl *sdl; | |
522 | char ifname[IFNAMSIZ]; | |
523 | short ifnlen = 0; | |
86c57af5 | 524 | int maskbit; |
d62a17ae | 525 | caddr_t cp; |
5b62211d | 526 | char fbuf[64]; |
d62a17ae | 527 | |
528 | /* terminate ifname at head (for strnlen) and tail (for safety) */ | |
529 | ifname[IFNAMSIZ - 1] = '\0'; | |
530 | ||
531 | /* paranoia: sanity check structure */ | |
532 | if (ifm->ifm_msglen < sizeof(struct if_msghdr)) { | |
e914ccbe | 533 | flog_err(EC_ZEBRA_NETLINK_LENGTH_ERROR, |
1c50c1c0 QY |
534 | "ifm_read: ifm->ifm_msglen %d too short\n", |
535 | ifm->ifm_msglen); | |
d62a17ae | 536 | return -1; |
537 | } | |
538 | ||
539 | /* | |
540 | * Check for a sockaddr_dl following the message. First, point to | |
541 | * where a socakddr might be if one follows the message. | |
542 | */ | |
543 | cp = (void *)(ifm + 1); | |
718e3744 | 544 | |
4bfbea8c | 545 | #ifdef SUNOS_5 |
d62a17ae | 546 | /* |
547 | * XXX This behavior should be narrowed to only the kernel versions | |
548 | * for which the structures returned do not match the headers. | |
549 | * | |
550 | * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions | |
551 | * is 12 bytes larger than the 32 bit version. | |
552 | */ | |
553 | if (((struct sockaddr *)cp)->sa_family == AF_UNSPEC) | |
554 | cp = cp + 12; | |
4bfbea8c | 555 | #endif |
3e95a074 | 556 | |
86c57af5 RZ |
557 | /* Look up for RTA_IFP and skip others. */ |
558 | for (maskbit = 1; maskbit; maskbit <<= 1) { | |
559 | if ((maskbit & ifm->ifm_addrs) == 0) | |
560 | continue; | |
561 | if (maskbit != RTA_IFP) { | |
562 | cp += rta_get(cp, NULL, 0); | |
563 | continue; | |
564 | } | |
565 | ||
566 | /* Save the pointer to the structure. */ | |
567 | sdl = (struct sockaddr_dl *)cp; | |
568 | cp += rta_getsdlname(cp, ifname, &ifnlen); | |
569 | } | |
d62a17ae | 570 | |
571 | if (IS_ZEBRA_DEBUG_KERNEL) | |
5b62211d RZ |
572 | zlog_debug("%s: sdl ifname %s addrs {%s}", __func__, |
573 | (ifnlen ? ifname : "(nil)"), | |
574 | rtatostr(ifm->ifm_addrs, fbuf, sizeof(fbuf))); | |
d62a17ae | 575 | |
576 | /* | |
577 | * Look up on ifindex first, because ifindices are the primary handle | |
578 | * for | |
579 | * interfaces across the user/kernel boundary, for most systems. (Some | |
580 | * messages, such as up/down status changes on NetBSD, do not include a | |
581 | * sockaddr_dl). | |
582 | */ | |
583 | if ((ifp = if_lookup_by_index(ifm->ifm_index, VRF_DEFAULT)) != NULL) { | |
584 | /* we have an ifp, verify that the name matches as some systems, | |
585 | * eg Solaris, have a 1:many association of ifindex:ifname | |
586 | * if they dont match, we dont have the correct ifp and should | |
587 | * set it back to NULL to let next check do lookup by name | |
588 | */ | |
589 | if (ifnlen && (strncmp(ifp->name, ifname, IFNAMSIZ) != 0)) { | |
590 | if (IS_ZEBRA_DEBUG_KERNEL) | |
591 | zlog_debug( | |
0437e105 | 592 | "%s: ifp name %s doesn't match sdl name %s", |
d62a17ae | 593 | __func__, ifp->name, ifname); |
594 | ifp = NULL; | |
595 | } | |
da26e3b6 | 596 | } |
5c78b3d0 | 597 | |
d62a17ae | 598 | /* |
599 | * If we dont have an ifp, try looking up by name. Particularly as some | |
600 | * systems (Solaris) have a 1:many mapping of ifindex:ifname - the | |
601 | * ifname | |
602 | * is therefore our unique handle to that interface. | |
603 | * | |
604 | * Interfaces specified in the configuration file for which the ifindex | |
605 | * has not been determined will have ifindex == IFINDEX_INTERNAL, and | |
606 | * such | |
607 | * interfaces are found by this search, and then their ifindex values | |
608 | * can | |
609 | * be filled in. | |
610 | */ | |
611 | if ((ifp == NULL) && ifnlen) | |
612 | ifp = if_lookup_by_name(ifname, VRF_DEFAULT); | |
613 | ||
614 | /* | |
615 | * If ifp still does not exist or has an invalid index | |
616 | * (IFINDEX_INTERNAL), | |
617 | * create or fill in an interface. | |
618 | */ | |
619 | if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) { | |
620 | /* | |
621 | * To create or fill in an interface, a sockaddr_dl (via | |
622 | * RTA_IFP) is required. | |
623 | */ | |
624 | if (!ifnlen) { | |
9165c5f5 | 625 | zlog_debug("Interface index %d (new) missing ifname", |
9df414fe | 626 | ifm->ifm_index); |
d62a17ae | 627 | return -1; |
628 | } | |
629 | ||
5c78b3d0 | 630 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 631 | /* Down->Down interface should be ignored here. |
632 | * See further comment below. | |
633 | */ | |
634 | if (!CHECK_FLAG(ifm->ifm_flags, IFF_UP)) | |
635 | return 0; | |
5c78b3d0 | 636 | #endif /* !RTM_IFANNOUNCE */ |
d62a17ae | 637 | |
638 | if (ifp == NULL) { | |
639 | /* Interface that zebra was not previously aware of, so | |
640 | * create. */ | |
bcc24579 | 641 | ifp = if_create(ifname, VRF_DEFAULT); |
d62a17ae | 642 | if (IS_ZEBRA_DEBUG_KERNEL) |
643 | zlog_debug("%s: creating ifp for ifindex %d", | |
644 | __func__, ifm->ifm_index); | |
645 | } | |
646 | ||
647 | if (IS_ZEBRA_DEBUG_KERNEL) | |
648 | zlog_debug( | |
649 | "%s: updated/created ifp, ifname %s, ifindex %d", | |
650 | __func__, ifp->name, ifp->ifindex); | |
651 | /* | |
652 | * Fill in newly created interface structure, or larval | |
653 | * structure with ifindex IFINDEX_INTERNAL. | |
654 | */ | |
ff880b78 | 655 | if_set_index(ifp, ifm->ifm_index); |
d62a17ae | 656 | |
9234b382 | 657 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 658 | bsd_linkdetect_translate(ifm); |
9234b382 | 659 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 660 | |
d62a17ae | 661 | if_flags_update(ifp, ifm->ifm_flags); |
718e3744 | 662 | #if defined(__bsdi__) |
d62a17ae | 663 | if_kvm_get_mtu(ifp); |
718e3744 | 664 | #else |
d62a17ae | 665 | if_get_mtu(ifp); |
718e3744 | 666 | #endif /* __bsdi__ */ |
d62a17ae | 667 | if_get_metric(ifp); |
668 | ||
669 | /* | |
670 | * XXX sockaddr_dl contents can be larger than the structure | |
671 | * definition. There are 2 big families here: | |
672 | * - BSD has sdl_len + sdl_data[16] + overruns sdl_data | |
673 | * we MUST use sdl_len here or we'll truncate data. | |
674 | * - Solaris has no sdl_len, but sdl_data[244] | |
675 | * presumably, it's not going to run past that, so sizeof() | |
676 | * is fine here. | |
86c57af5 | 677 | * a nonzero ifnlen from rta_getsdlname() means sdl is valid |
d62a17ae | 678 | */ |
679 | ifp->ll_type = ZEBRA_LLT_UNKNOWN; | |
680 | ifp->hw_addr_len = 0; | |
681 | if (ifnlen) { | |
ca3ccd87 | 682 | #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN |
d62a17ae | 683 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
684 | sdl->sdl_len); | |
ca3ccd87 | 685 | #else |
d62a17ae | 686 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
687 | sizeof(struct sockaddr_dl)); | |
ca3ccd87 | 688 | #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */ |
8ccc7e80 | 689 | |
d62a17ae | 690 | ifp->ll_type = sdl_to_zebra_link_type(sdl->sdl_type); |
691 | if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) { | |
692 | memcpy(ifp->hw_addr, LLADDR(sdl), | |
693 | sdl->sdl_alen); | |
694 | ifp->hw_addr_len = sdl->sdl_alen; | |
695 | } | |
696 | } | |
697 | ||
698 | if_add_update(ifp); | |
699 | } else | |
700 | /* | |
701 | * Interface structure exists. Adjust stored flags from | |
702 | * notification. If interface has up->down or down->up | |
703 | * transition, call state change routines (to adjust routes, | |
704 | * notify routing daemons, etc.). (Other flag changes are stored | |
705 | * but apparently do not trigger action.) | |
706 | */ | |
707 | { | |
708 | if (ifp->ifindex != ifm->ifm_index) { | |
9df414fe | 709 | zlog_debug( |
d62a17ae | 710 | "%s: index mismatch, ifname %s, ifp index %d, " |
711 | "ifm index %d", | |
712 | __func__, ifp->name, ifp->ifindex, | |
713 | ifm->ifm_index); | |
714 | return -1; | |
715 | } | |
716 | ||
9234b382 | 717 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 718 | bsd_linkdetect_translate(ifm); |
9234b382 | 719 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 720 | |
d62a17ae | 721 | /* update flags and handle operative->inoperative transition, if |
722 | * any */ | |
723 | if_flags_update(ifp, ifm->ifm_flags); | |
724 | ||
6eb8827d | 725 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 726 | if (!if_is_up(ifp)) { |
727 | /* No RTM_IFANNOUNCE on this platform, so we can never | |
728 | * distinguish between ~IFF_UP and delete. We must | |
729 | * presume | |
730 | * it has been deleted. | |
731 | * Eg, Solaris will not notify us of unplumb. | |
732 | * | |
733 | * XXX: Fixme - this should be runtime detected | |
734 | * So that a binary compiled on a system with IFANNOUNCE | |
735 | * will still behave correctly if run on a platform | |
736 | * without | |
737 | */ | |
738 | if_delete_update(ifp); | |
739 | } | |
6eb8827d | 740 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 741 | if (if_is_up(ifp)) { |
1ba27564 | 742 | #if defined(__bsdi__) |
d62a17ae | 743 | if_kvm_get_mtu(ifp); |
1ba27564 | 744 | #else |
d62a17ae | 745 | if_get_mtu(ifp); |
1ba27564 | 746 | #endif /* __bsdi__ */ |
d62a17ae | 747 | if_get_metric(ifp); |
748 | } | |
749 | } | |
5c78b3d0 | 750 | |
718e3744 | 751 | #ifdef HAVE_NET_RT_IFLIST |
d62a17ae | 752 | ifp->stats = ifm->ifm_data; |
718e3744 | 753 | #endif /* HAVE_NET_RT_IFLIST */ |
04427fcb | 754 | ifp->speed = ifm->ifm_data.ifi_baudrate / 1000000; |
718e3744 | 755 | |
d62a17ae | 756 | if (IS_ZEBRA_DEBUG_KERNEL) |
757 | zlog_debug("%s: interface %s index %d", __func__, ifp->name, | |
758 | ifp->ifindex); | |
718e3744 | 759 | |
d62a17ae | 760 | return 0; |
718e3744 | 761 | } |
6b0655a2 | 762 | |
718e3744 | 763 | /* Address read from struct ifa_msghdr. */ |
d62a17ae | 764 | static void ifam_read_mesg(struct ifa_msghdr *ifm, union sockunion *addr, |
765 | union sockunion *mask, union sockunion *brd, | |
766 | char *ifname, short *ifnlen) | |
718e3744 | 767 | { |
d62a17ae | 768 | caddr_t pnt, end; |
769 | union sockunion dst; | |
770 | union sockunion gateway; | |
86c57af5 | 771 | int maskbit; |
5b62211d | 772 | char fbuf[64]; |
d62a17ae | 773 | |
774 | pnt = (caddr_t)(ifm + 1); | |
775 | end = ((caddr_t)ifm) + ifm->ifam_msglen; | |
776 | ||
777 | /* Be sure structure is cleared */ | |
778 | memset(mask, 0, sizeof(union sockunion)); | |
779 | memset(addr, 0, sizeof(union sockunion)); | |
780 | memset(brd, 0, sizeof(union sockunion)); | |
781 | memset(&dst, 0, sizeof(union sockunion)); | |
782 | memset(&gateway, 0, sizeof(union sockunion)); | |
783 | ||
784 | /* We fetch each socket variable into sockunion. */ | |
86c57af5 RZ |
785 | for (maskbit = 1; maskbit; maskbit <<= 1) { |
786 | if ((maskbit & ifm->ifam_addrs) == 0) | |
787 | continue; | |
788 | ||
789 | switch (maskbit) { | |
790 | case RTA_DST: | |
791 | pnt += rta_get(pnt, &dst, sizeof(dst)); | |
792 | break; | |
793 | case RTA_GATEWAY: | |
794 | pnt += rta_get(pnt, &gateway, sizeof(gateway)); | |
795 | break; | |
796 | case RTA_NETMASK: | |
19fb538d | 797 | pnt += rta_getattr(pnt, mask, sizeof(*mask)); |
86c57af5 RZ |
798 | break; |
799 | case RTA_IFP: | |
800 | pnt += rta_getsdlname(pnt, ifname, ifnlen); | |
801 | break; | |
802 | case RTA_IFA: | |
803 | pnt += rta_get(pnt, addr, sizeof(*addr)); | |
804 | break; | |
805 | case RTA_BRD: | |
806 | pnt += rta_get(pnt, brd, sizeof(*brd)); | |
807 | break; | |
808 | ||
809 | default: | |
810 | pnt += rta_get(pnt, NULL, 0); | |
811 | break; | |
812 | } | |
813 | ||
814 | if (pnt > end) { | |
815 | zlog_warn("%s: overflow detected (pnt:%p end:%p)", | |
816 | __func__, pnt, end); | |
817 | break; | |
818 | } | |
819 | } | |
d62a17ae | 820 | |
821 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
7053cae4 | 822 | switch (sockunion_family(addr)) { |
d62a17ae | 823 | case AF_INET: |
824 | case AF_INET6: { | |
825 | char buf[4][INET6_ADDRSTRLEN]; | |
7053cae4 RZ |
826 | int masklen = |
827 | (sockunion_family(addr) == AF_INET) | |
828 | ? ip_masklen(mask->sin.sin_addr) | |
829 | : ip6_masklen(mask->sin6.sin6_addr); | |
d62a17ae | 830 | zlog_debug( |
5b62211d | 831 | "%s: ifindex %d, ifname %s, ifam_addrs {%s}, " |
d62a17ae | 832 | "ifam_flags 0x%x, addr %s/%d broad %s dst %s " |
833 | "gateway %s", | |
834 | __func__, ifm->ifam_index, | |
5b62211d RZ |
835 | (ifnlen ? ifname : "(nil)"), |
836 | rtatostr(ifm->ifam_addrs, fbuf, sizeof(fbuf)), | |
d62a17ae | 837 | ifm->ifam_flags, |
7053cae4 RZ |
838 | sockunion2str(addr, buf[0], sizeof(buf[0])), |
839 | masklen, | |
840 | sockunion2str(brd, buf[1], sizeof(buf[1])), | |
841 | sockunion2str(&dst, buf[2], sizeof(buf[2])), | |
842 | sockunion2str(&gateway, buf[2], | |
843 | sizeof(buf[2]))); | |
d62a17ae | 844 | } break; |
845 | default: | |
5b62211d | 846 | zlog_debug("%s: ifindex %d, ifname %s, ifam_addrs {%s}", |
d62a17ae | 847 | __func__, ifm->ifam_index, |
848 | (ifnlen ? ifname : "(nil)"), | |
5b62211d RZ |
849 | rtatostr(ifm->ifam_addrs, fbuf, |
850 | sizeof(fbuf))); | |
d62a17ae | 851 | break; |
852 | } | |
853 | } | |
854 | ||
855 | /* Assert read up end point matches to end point */ | |
86c57af5 | 856 | pnt = (caddr_t)ROUNDUP((size_t)pnt); |
2d100aa5 | 857 | if (pnt != (caddr_t)ROUNDUP((size_t)end)) |
9df414fe | 858 | zlog_debug("ifam_read() doesn't read all socket data"); |
718e3744 | 859 | } |
860 | ||
861 | /* Interface's address information get. */ | |
d62a17ae | 862 | int ifam_read(struct ifa_msghdr *ifam) |
718e3744 | 863 | { |
d62a17ae | 864 | struct interface *ifp = NULL; |
865 | union sockunion addr, mask, brd; | |
866 | char ifname[INTERFACE_NAMSIZ]; | |
867 | short ifnlen = 0; | |
868 | char isalias = 0; | |
869 | int flags = 0; | |
870 | ||
871 | ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; | |
872 | ||
873 | /* Allocate and read address information. */ | |
874 | ifam_read_mesg(ifam, &addr, &mask, &brd, ifname, &ifnlen); | |
875 | ||
876 | if ((ifp = if_lookup_by_index(ifam->ifam_index, VRF_DEFAULT)) == NULL) { | |
e914ccbe | 877 | flog_warn(EC_ZEBRA_UNKNOWN_INTERFACE, |
9df414fe | 878 | "%s: no interface for ifname %s, index %d", __func__, |
d62a17ae | 879 | ifname, ifam->ifam_index); |
880 | return -1; | |
881 | } | |
882 | ||
883 | if (ifnlen && strncmp(ifp->name, ifname, INTERFACE_NAMSIZ)) | |
884 | isalias = 1; | |
885 | ||
886 | /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD | |
887 | field contains a broadcast address or a peer address, so we are | |
888 | forced to | |
889 | rely upon the interface type. */ | |
890 | if (if_is_pointopoint(ifp)) | |
891 | SET_FLAG(flags, ZEBRA_IFA_PEER); | |
7ab62c53 | 892 | |
6502208c PJ |
893 | #if 0 |
894 | /* it might seem cute to grab the interface metric here, however | |
895 | * we're processing an address update message, and so some systems | |
896 | * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left | |
897 | * in deliberately, as comment. | |
898 | */ | |
d34b8991 | 899 | ifp->metric = ifam->ifam_metric; |
6502208c PJ |
900 | #endif |
901 | ||
d62a17ae | 902 | /* Add connected address. */ |
903 | switch (sockunion_family(&addr)) { | |
904 | case AF_INET: | |
905 | if (ifam->ifam_type == RTM_NEWADDR) | |
906 | connected_add_ipv4(ifp, flags, &addr.sin.sin_addr, | |
907 | ip_masklen(mask.sin.sin_addr), | |
908 | &brd.sin.sin_addr, | |
cde1af84 AK |
909 | (isalias ? ifname : NULL), |
910 | METRIC_MAX); | |
d62a17ae | 911 | else |
912 | connected_delete_ipv4(ifp, flags, &addr.sin.sin_addr, | |
913 | ip_masklen(mask.sin.sin_addr), | |
914 | &brd.sin.sin_addr); | |
915 | break; | |
916 | case AF_INET6: | |
917 | /* Unset interface index from link-local address when IPv6 stack | |
918 | is KAME. */ | |
919 | if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6.sin6_addr)) { | |
920 | SET_IN6_LINKLOCAL_IFINDEX(addr.sin6.sin6_addr, 0); | |
921 | } | |
922 | ||
923 | if (ifam->ifam_type == RTM_NEWADDR) | |
924 | connected_add_ipv6(ifp, flags, &addr.sin6.sin6_addr, | |
60c0687a | 925 | NULL, |
d62a17ae | 926 | ip6_masklen(mask.sin6.sin6_addr), |
cde1af84 AK |
927 | (isalias ? ifname : NULL), |
928 | METRIC_MAX); | |
d62a17ae | 929 | else |
60c0687a | 930 | connected_delete_ipv6(ifp, &addr.sin6.sin6_addr, NULL, |
608105a7 | 931 | ip6_masklen(mask.sin6.sin6_addr)); |
d62a17ae | 932 | break; |
933 | default: | |
934 | /* Unsupported family silently ignore... */ | |
935 | break; | |
936 | } | |
937 | ||
938 | /* Check interface flag for implicit up of the interface. */ | |
939 | if_refresh(ifp); | |
5c78b3d0 | 940 | |
941 | #ifdef SUNOS_5 | |
d62a17ae | 942 | /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange. |
943 | * See comments for SUNOS_5 in interface.c::if_flags_mangle. | |
944 | * | |
945 | * Here we take care of case where the real IFF_UP was previously | |
946 | * unset (as kept in struct zebra_if.primary_state) and the mangled | |
947 | * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned | |
948 | * to unset due to the lost non-primary address having DELADDR'd. | |
949 | * | |
950 | * we must delete the interface, because in between here and next | |
951 | * event for this interface-name the administrator could unplumb | |
952 | * and replumb the interface. | |
953 | */ | |
954 | if (!if_is_up(ifp)) | |
955 | if_delete_update(ifp); | |
5c78b3d0 | 956 | #endif /* SUNOS_5 */ |
d62a17ae | 957 | |
958 | return 0; | |
718e3744 | 959 | } |
6b0655a2 | 960 | |
718e3744 | 961 | /* Interface function for reading kernel routing table information. */ |
d62a17ae | 962 | static int rtm_read_mesg(struct rt_msghdr *rtm, union sockunion *dest, |
963 | union sockunion *mask, union sockunion *gate, | |
964 | char *ifname, short *ifnlen) | |
718e3744 | 965 | { |
d62a17ae | 966 | caddr_t pnt, end; |
86c57af5 | 967 | int maskbit; |
d62a17ae | 968 | |
969 | /* Pnt points out socket data start point. */ | |
970 | pnt = (caddr_t)(rtm + 1); | |
971 | end = ((caddr_t)rtm) + rtm->rtm_msglen; | |
972 | ||
973 | /* rt_msghdr version check. */ | |
974 | if (rtm->rtm_version != RTM_VERSION) | |
e914ccbe | 975 | flog_warn(EC_ZEBRA_RTM_VERSION_MISMATCH, |
9df414fe QY |
976 | "Routing message version different %d should be %d." |
977 | "This may cause problem\n", | |
978 | rtm->rtm_version, RTM_VERSION); | |
d62a17ae | 979 | |
980 | /* Be sure structure is cleared */ | |
981 | memset(dest, 0, sizeof(union sockunion)); | |
982 | memset(gate, 0, sizeof(union sockunion)); | |
983 | memset(mask, 0, sizeof(union sockunion)); | |
984 | ||
985 | /* We fetch each socket variable into sockunion. */ | |
86c57af5 RZ |
986 | /* We fetch each socket variable into sockunion. */ |
987 | for (maskbit = 1; maskbit; maskbit <<= 1) { | |
988 | if ((maskbit & rtm->rtm_addrs) == 0) | |
989 | continue; | |
990 | ||
991 | switch (maskbit) { | |
992 | case RTA_DST: | |
993 | pnt += rta_get(pnt, dest, sizeof(*dest)); | |
994 | break; | |
995 | case RTA_GATEWAY: | |
996 | pnt += rta_get(pnt, gate, sizeof(*gate)); | |
997 | break; | |
998 | case RTA_NETMASK: | |
1583f8f5 | 999 | pnt += rta_getattr(pnt, mask, sizeof(*mask)); |
86c57af5 RZ |
1000 | break; |
1001 | case RTA_IFP: | |
1002 | pnt += rta_getsdlname(pnt, ifname, ifnlen); | |
1003 | break; | |
1004 | ||
1005 | default: | |
1006 | pnt += rta_get(pnt, NULL, 0); | |
1007 | break; | |
1008 | } | |
1009 | ||
1010 | if (pnt > end) { | |
1011 | zlog_warn("%s: overflow detected (pnt:%p end:%p)", | |
1012 | __func__, pnt, end); | |
1013 | break; | |
1014 | } | |
1015 | } | |
d62a17ae | 1016 | |
1017 | /* If there is netmask information set it's family same as | |
1018 | destination family*/ | |
1019 | if (rtm->rtm_addrs & RTA_NETMASK) | |
1020 | mask->sa.sa_family = dest->sa.sa_family; | |
1021 | ||
1022 | /* Assert read up to the end of pointer. */ | |
1023 | if (pnt != end) | |
9df414fe | 1024 | zlog_debug("rtm_read() doesn't read all socket data."); |
d62a17ae | 1025 | |
1026 | return rtm->rtm_flags; | |
718e3744 | 1027 | } |
1028 | ||
d62a17ae | 1029 | void rtm_read(struct rt_msghdr *rtm) |
718e3744 | 1030 | { |
d62a17ae | 1031 | int flags; |
d7c0a89a | 1032 | uint8_t zebra_flags; |
d62a17ae | 1033 | union sockunion dest, mask, gate; |
1034 | char ifname[INTERFACE_NAMSIZ + 1]; | |
1035 | short ifnlen = 0; | |
fd36be7e | 1036 | struct nexthop nh; |
026745a2 DS |
1037 | struct prefix p; |
1038 | ifindex_t ifindex = 0; | |
1039 | afi_t afi; | |
5b62211d | 1040 | char fbuf[64]; |
d62a17ae | 1041 | |
1042 | zebra_flags = 0; | |
1043 | ||
1044 | /* Read destination and netmask and gateway from rtm message | |
1045 | structure. */ | |
1046 | flags = rtm_read_mesg(rtm, &dest, &mask, &gate, ifname, &ifnlen); | |
1047 | if (!(flags & RTF_DONE)) | |
1048 | return; | |
1049 | if (IS_ZEBRA_DEBUG_KERNEL) | |
5b62211d | 1050 | zlog_debug("%s: got rtm of type %d (%s) addrs {%s}", __func__, |
d62a17ae | 1051 | rtm->rtm_type, |
5b62211d RZ |
1052 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL), |
1053 | rtatostr(rtm->rtm_addrs, fbuf, sizeof(fbuf))); | |
d62a17ae | 1054 | |
1055 | #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ | |
1056 | if (flags & RTF_CLONED) | |
1057 | return; | |
718e3744 | 1058 | #endif |
d62a17ae | 1059 | #ifdef RTF_WASCLONED /*freebsd*/ |
1060 | if (flags & RTF_WASCLONED) | |
1061 | return; | |
718e3744 | 1062 | #endif |
1063 | ||
d62a17ae | 1064 | if ((rtm->rtm_type == RTM_ADD || rtm->rtm_type == RTM_CHANGE) |
1065 | && !(flags & RTF_UP)) | |
1066 | return; | |
1067 | ||
1068 | /* This is connected route. */ | |
1069 | if (!(flags & RTF_GATEWAY)) | |
1070 | return; | |
1071 | ||
1072 | if (flags & RTF_PROTO1) | |
1073 | SET_FLAG(zebra_flags, ZEBRA_FLAG_SELFROUTE); | |
1074 | ||
a8309422 | 1075 | memset(&nh, 0, sizeof(nh)); |
4a7371e9 DS |
1076 | |
1077 | nh.vrf_id = VRF_DEFAULT; | |
d62a17ae | 1078 | /* This is a reject or blackhole route */ |
a8309422 DL |
1079 | if (flags & RTF_REJECT) { |
1080 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
1081 | nh.bh_type = BLACKHOLE_REJECT; | |
1082 | } else if (flags & RTF_BLACKHOLE) { | |
1083 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
1084 | nh.bh_type = BLACKHOLE_NULL; | |
1085 | } | |
d62a17ae | 1086 | |
c626d369 DS |
1087 | /* |
1088 | * Ignore our own messages. | |
1089 | */ | |
1090 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) | |
1091 | return; | |
d62a17ae | 1092 | |
d62a17ae | 1093 | if (dest.sa.sa_family == AF_INET) { |
026745a2 | 1094 | afi = AFI_IP; |
d62a17ae | 1095 | p.family = AF_INET; |
1096 | p.u.prefix4 = dest.sin.sin_addr; | |
1097 | if (flags & RTF_HOST) | |
1098 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
1099 | else | |
1100 | p.prefixlen = ip_masklen(mask.sin.sin_addr); | |
1101 | ||
a8309422 DL |
1102 | if (!nh.type) { |
1103 | nh.type = NEXTHOP_TYPE_IPV4; | |
1104 | nh.gate.ipv4 = gate.sin.sin_addr; | |
1105 | } | |
026745a2 DS |
1106 | } else if (dest.sa.sa_family == AF_INET6) { |
1107 | afi = AFI_IP6; | |
d62a17ae | 1108 | p.family = AF_INET6; |
1109 | p.u.prefix6 = dest.sin6.sin6_addr; | |
1110 | if (flags & RTF_HOST) | |
1111 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1112 | else | |
1113 | p.prefixlen = ip6_masklen(mask.sin6.sin6_addr); | |
718e3744 | 1114 | |
1115 | #ifdef KAME | |
d62a17ae | 1116 | if (IN6_IS_ADDR_LINKLOCAL(&gate.sin6.sin6_addr)) { |
1117 | ifindex = IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr); | |
1118 | SET_IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr, 0); | |
1119 | } | |
718e3744 | 1120 | #endif /* KAME */ |
1121 | ||
a8309422 DL |
1122 | if (!nh.type) { |
1123 | nh.type = ifindex ? NEXTHOP_TYPE_IPV6_IFINDEX | |
1124 | : NEXTHOP_TYPE_IPV6; | |
1125 | nh.gate.ipv6 = gate.sin6.sin6_addr; | |
1126 | nh.ifindex = ifindex; | |
1127 | } | |
026745a2 DS |
1128 | } else |
1129 | return; | |
d62a17ae | 1130 | |
026745a2 DS |
1131 | /* |
1132 | * CHANGE: delete the old prefix, we have no further information | |
1133 | * to specify the route really | |
1134 | */ | |
1135 | if (rtm->rtm_type == RTM_CHANGE) | |
1136 | rib_delete(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, | |
1137 | 0, zebra_flags, &p, NULL, NULL, 0, 0, 0, true); | |
1138 | if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD | |
1139 | || rtm->rtm_type == RTM_CHANGE) | |
1140 | rib_add(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0, | |
1141 | zebra_flags, &p, NULL, &nh, 0, 0, 0, 0, 0); | |
1142 | else | |
1143 | rib_delete(afi, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, | |
1144 | 0, zebra_flags, &p, NULL, &nh, 0, 0, 0, true); | |
718e3744 | 1145 | } |
1146 | ||
1147 | /* Interface function for the kernel routing table updates. Support | |
6621ca86 | 1148 | * for RTM_CHANGE will be needed. |
1149 | * Exported only for rt_socket.c | |
1150 | */ | |
d62a17ae | 1151 | int rtm_write(int message, union sockunion *dest, union sockunion *mask, |
1152 | union sockunion *gate, union sockunion *mpls, unsigned int index, | |
a8309422 | 1153 | enum blackhole_type bh_type, int metric) |
718e3744 | 1154 | { |
d62a17ae | 1155 | int ret; |
1156 | caddr_t pnt; | |
1157 | struct interface *ifp; | |
1158 | ||
1159 | /* Sequencial number of routing message. */ | |
1160 | static int msg_seq = 0; | |
1161 | ||
1162 | /* Struct of rt_msghdr and buffer for storing socket's data. */ | |
1163 | struct { | |
1164 | struct rt_msghdr rtm; | |
1165 | char buf[512]; | |
1166 | } msg; | |
1167 | ||
80776aec | 1168 | if (dplane_routing_sock < 0) |
d62a17ae | 1169 | return ZEBRA_ERR_EPERM; |
1170 | ||
1171 | /* Clear and set rt_msghdr values */ | |
1172 | memset(&msg, 0, sizeof(struct rt_msghdr)); | |
1173 | msg.rtm.rtm_version = RTM_VERSION; | |
1174 | msg.rtm.rtm_type = message; | |
1175 | msg.rtm.rtm_seq = msg_seq++; | |
1176 | msg.rtm.rtm_addrs = RTA_DST; | |
1177 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
1178 | msg.rtm.rtm_flags = RTF_UP; | |
fe6c7157 | 1179 | #ifdef __OpenBSD__ |
d62a17ae | 1180 | msg.rtm.rtm_flags |= RTF_MPATH; |
1181 | msg.rtm.rtm_fmask = RTF_MPLS; | |
d3e2c74a | 1182 | #endif |
d62a17ae | 1183 | msg.rtm.rtm_index = index; |
718e3744 | 1184 | |
d62a17ae | 1185 | if (metric != 0) { |
1186 | msg.rtm.rtm_rmx.rmx_hopcount = metric; | |
1187 | msg.rtm.rtm_inits |= RTV_HOPCOUNT; | |
1188 | } | |
718e3744 | 1189 | |
d62a17ae | 1190 | ifp = if_lookup_by_index(index, VRF_DEFAULT); |
718e3744 | 1191 | |
d62a17ae | 1192 | if (gate && (message == RTM_ADD || message == RTM_CHANGE)) |
1193 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
718e3744 | 1194 | |
d62a17ae | 1195 | /* When RTF_CLONING is unavailable on BSD, should we set some |
1196 | * other flag instead? | |
1197 | */ | |
e6f148e6 | 1198 | #ifdef RTF_CLONING |
d62a17ae | 1199 | if (!gate && (message == RTM_ADD || message == RTM_CHANGE) && ifp |
1200 | && (ifp->flags & IFF_POINTOPOINT) == 0) | |
1201 | msg.rtm.rtm_flags |= RTF_CLONING; | |
e6f148e6 | 1202 | #endif /* RTF_CLONING */ |
718e3744 | 1203 | |
d62a17ae | 1204 | /* If no protocol specific gateway is specified, use link |
1205 | address for gateway. */ | |
1206 | if (!gate) { | |
1207 | if (!ifp) { | |
1208 | char dest_buf[INET_ADDRSTRLEN] = "NULL", | |
1209 | mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; | |
1210 | if (dest) | |
1211 | inet_ntop(AF_INET, &dest->sin.sin_addr, | |
1212 | dest_buf, INET_ADDRSTRLEN); | |
1213 | if (mask) | |
1214 | inet_ntop(AF_INET, &mask->sin.sin_addr, | |
1215 | mask_buf, INET_ADDRSTRLEN); | |
9df414fe | 1216 | flog_warn( |
e914ccbe | 1217 | EC_ZEBRA_RTM_NO_GATEWAY, |
d62a17ae | 1218 | "%s: %s/%s: gate == NULL and no gateway found for ifindex %d", |
1219 | __func__, dest_buf, mask_buf, index); | |
1220 | return -1; | |
1221 | } | |
1222 | gate = (union sockunion *)&((struct zebra_if *)ifp->info)->sdl; | |
1223 | } | |
1224 | ||
1225 | if (mask) | |
1226 | msg.rtm.rtm_addrs |= RTA_NETMASK; | |
1227 | else if (message == RTM_ADD || message == RTM_CHANGE) | |
1228 | msg.rtm.rtm_flags |= RTF_HOST; | |
718e3744 | 1229 | |
fe6c7157 | 1230 | #ifdef __OpenBSD__ |
d62a17ae | 1231 | if (mpls) { |
1232 | msg.rtm.rtm_addrs |= RTA_SRC; | |
1233 | msg.rtm.rtm_flags |= RTF_MPLS; | |
1234 | ||
1235 | if (mpls->smpls.smpls_label | |
70e98a7f | 1236 | != htonl(MPLS_LABEL_IMPLICIT_NULL << MPLS_LABEL_OFFSET)) |
d62a17ae | 1237 | msg.rtm.rtm_mpls = MPLS_OP_PUSH; |
1238 | } | |
d3e2c74a RW |
1239 | #endif |
1240 | ||
d62a17ae | 1241 | /* Tagging route with flags */ |
1242 | msg.rtm.rtm_flags |= (RTF_PROTO1); | |
718e3744 | 1243 | |
a8309422 DL |
1244 | switch (bh_type) { |
1245 | case BLACKHOLE_UNSPEC: | |
1246 | break; | |
1247 | case BLACKHOLE_REJECT: | |
d62a17ae | 1248 | msg.rtm.rtm_flags |= RTF_REJECT; |
a8309422 DL |
1249 | break; |
1250 | default: | |
1251 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
1252 | break; | |
1253 | } | |
81dfcaa2 | 1254 | |
718e3744 | 1255 | |
d62a17ae | 1256 | #define SOCKADDRSET(X, R) \ |
1257 | if (msg.rtm.rtm_addrs & (R)) { \ | |
1258 | int len = SAROUNDUP(X); \ | |
1259 | memcpy(pnt, (caddr_t)(X), len); \ | |
1260 | pnt += len; \ | |
1261 | } | |
718e3744 | 1262 | |
d62a17ae | 1263 | pnt = (caddr_t)msg.buf; |
718e3744 | 1264 | |
d62a17ae | 1265 | /* Write each socket data into rtm message buffer */ |
1266 | SOCKADDRSET(dest, RTA_DST); | |
1267 | SOCKADDRSET(gate, RTA_GATEWAY); | |
1268 | SOCKADDRSET(mask, RTA_NETMASK); | |
fe6c7157 | 1269 | #ifdef __OpenBSD__ |
d62a17ae | 1270 | SOCKADDRSET(mpls, RTA_SRC); |
d3e2c74a | 1271 | #endif |
718e3744 | 1272 | |
d62a17ae | 1273 | msg.rtm.rtm_msglen = pnt - (caddr_t)&msg; |
1274 | ||
80776aec | 1275 | ret = write(dplane_routing_sock, &msg, msg.rtm.rtm_msglen); |
d62a17ae | 1276 | |
1277 | if (ret != msg.rtm.rtm_msglen) { | |
1278 | if (errno == EEXIST) | |
1279 | return ZEBRA_ERR_RTEXIST; | |
1280 | if (errno == ENETUNREACH) | |
1281 | return ZEBRA_ERR_RTUNREACH; | |
1282 | if (errno == ESRCH) | |
1283 | return ZEBRA_ERR_RTNOEXIST; | |
1284 | ||
450971aa | 1285 | flog_err_sys(EC_LIB_SOCKET, "%s: write : %s (%d)", __func__, |
9df414fe | 1286 | safe_strerror(errno), errno); |
d62a17ae | 1287 | return ZEBRA_ERR_KERNEL; |
1288 | } | |
1289 | return ZEBRA_ERR_NOERROR; | |
718e3744 | 1290 | } |
1291 | ||
6b0655a2 | 1292 | |
718e3744 | 1293 | #include "thread.h" |
1294 | #include "zebra/zserv.h" | |
1295 | ||
718e3744 | 1296 | /* For debug purpose. */ |
d62a17ae | 1297 | static void rtmsg_debug(struct rt_msghdr *rtm) |
718e3744 | 1298 | { |
5b62211d RZ |
1299 | char fbuf[64]; |
1300 | ||
d62a17ae | 1301 | zlog_debug("Kernel: Len: %d Type: %s", rtm->rtm_msglen, |
1302 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); | |
1303 | rtm_flag_dump(rtm->rtm_flags); | |
1304 | zlog_debug("Kernel: message seq %d", rtm->rtm_seq); | |
5b62211d RZ |
1305 | zlog_debug("Kernel: pid %lld, rtm_addrs {%s}", (long long)rtm->rtm_pid, |
1306 | rtatostr(rtm->rtm_addrs, fbuf, sizeof(fbuf))); | |
718e3744 | 1307 | } |
1308 | ||
1309 | /* This is pretty gross, better suggestions welcome -- mhandler */ | |
1310 | #ifndef RTAX_MAX | |
1311 | #ifdef RTA_NUMBITS | |
1312 | #define RTAX_MAX RTA_NUMBITS | |
1313 | #else | |
1314 | #define RTAX_MAX 8 | |
1315 | #endif /* RTA_NUMBITS */ | |
1316 | #endif /* RTAX_MAX */ | |
1317 | ||
1318 | /* Kernel routing table and interface updates via routing socket. */ | |
d62a17ae | 1319 | static int kernel_read(struct thread *thread) |
718e3744 | 1320 | { |
d62a17ae | 1321 | int sock; |
1322 | int nbytes; | |
1323 | struct rt_msghdr *rtm; | |
1324 | ||
1325 | /* | |
1326 | * This must be big enough for any message the kernel might send. | |
1327 | * Rather than determining how many sockaddrs of what size might be | |
1328 | * in each particular message, just use RTAX_MAX of sockaddr_storage | |
1329 | * for each. Note that the sockaddrs must be after each message | |
1330 | * definition, or rather after whichever happens to be the largest, | |
1331 | * since the buffer needs to be big enough for a message and the | |
1332 | * sockaddrs together. | |
1333 | */ | |
1334 | union { | |
1335 | /* Routing information. */ | |
1336 | struct { | |
1337 | struct rt_msghdr rtm; | |
1338 | struct sockaddr_storage addr[RTAX_MAX]; | |
1339 | } r; | |
1340 | ||
1341 | /* Interface information. */ | |
1342 | struct { | |
1343 | struct if_msghdr ifm; | |
1344 | struct sockaddr_storage addr[RTAX_MAX]; | |
1345 | } im; | |
1346 | ||
1347 | /* Interface address information. */ | |
1348 | struct { | |
1349 | struct ifa_msghdr ifa; | |
1350 | struct sockaddr_storage addr[RTAX_MAX]; | |
1351 | } ia; | |
718e3744 | 1352 | |
1353 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 1354 | /* Interface arrival/departure */ |
1355 | struct { | |
1356 | struct if_announcemsghdr ifan; | |
1357 | struct sockaddr_storage addr[RTAX_MAX]; | |
1358 | } ian; | |
718e3744 | 1359 | #endif /* RTM_IFANNOUNCE */ |
1360 | ||
d62a17ae | 1361 | } buf; |
718e3744 | 1362 | |
d62a17ae | 1363 | /* Fetch routing socket. */ |
1364 | sock = THREAD_FD(thread); | |
718e3744 | 1365 | |
d62a17ae | 1366 | nbytes = read(sock, &buf, sizeof buf); |
718e3744 | 1367 | |
d62a17ae | 1368 | if (nbytes <= 0) { |
1369 | if (nbytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN) | |
450971aa | 1370 | flog_err_sys(EC_LIB_SOCKET, "routing socket error: %s", |
9df414fe | 1371 | safe_strerror(errno)); |
d62a17ae | 1372 | return 0; |
1373 | } | |
718e3744 | 1374 | |
3801e764 | 1375 | thread_add_read(zrouter.master, kernel_read, NULL, sock, NULL); |
718e3744 | 1376 | |
d62a17ae | 1377 | if (IS_ZEBRA_DEBUG_KERNEL) |
1378 | rtmsg_debug(&buf.r.rtm); | |
718e3744 | 1379 | |
d62a17ae | 1380 | rtm = &buf.r.rtm; |
718e3744 | 1381 | |
d62a17ae | 1382 | /* |
1383 | * Ensure that we didn't drop any data, so that processing routines | |
1384 | * can assume they have the whole message. | |
1385 | */ | |
1386 | if (rtm->rtm_msglen != nbytes) { | |
9df414fe | 1387 | zlog_debug( |
d62a17ae | 1388 | "kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n", |
1389 | rtm->rtm_msglen, nbytes, rtm->rtm_type); | |
1390 | return -1; | |
1391 | } | |
1392 | ||
1393 | switch (rtm->rtm_type) { | |
1394 | case RTM_ADD: | |
1395 | case RTM_DELETE: | |
1396 | case RTM_CHANGE: | |
1397 | rtm_read(rtm); | |
1398 | break; | |
1399 | case RTM_IFINFO: | |
1400 | ifm_read(&buf.im.ifm); | |
1401 | break; | |
1402 | case RTM_NEWADDR: | |
1403 | case RTM_DELADDR: | |
1404 | ifam_read(&buf.ia.ifa); | |
1405 | break; | |
718e3744 | 1406 | #ifdef RTM_IFANNOUNCE |
d62a17ae | 1407 | case RTM_IFANNOUNCE: |
1408 | ifan_read(&buf.ian.ifan); | |
1409 | break; | |
718e3744 | 1410 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 1411 | default: |
1412 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1413 | zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); | |
1414 | break; | |
1415 | } | |
1416 | return 0; | |
718e3744 | 1417 | } |
1418 | ||
1419 | /* Make routing socket. */ | |
d62a17ae | 1420 | static void routing_socket(struct zebra_ns *zns) |
718e3744 | 1421 | { |
6bb30c2c DL |
1422 | frr_elevate_privs(&zserv_privs) { |
1423 | routing_sock = ns_socket(AF_ROUTE, SOCK_RAW, 0, zns->ns_id); | |
80776aec MS |
1424 | |
1425 | dplane_routing_sock = | |
1426 | ns_socket(AF_ROUTE, SOCK_RAW, 0, zns->ns_id); | |
6bb30c2c | 1427 | } |
d62a17ae | 1428 | |
1429 | if (routing_sock < 0) { | |
1c50c1c0 | 1430 | flog_err_sys(EC_LIB_SOCKET, "Can't init kernel routing socket"); |
d62a17ae | 1431 | return; |
1432 | } | |
1433 | ||
80776aec MS |
1434 | if (dplane_routing_sock < 0) { |
1435 | flog_err_sys(EC_LIB_SOCKET, | |
1436 | "Can't init kernel dataplane routing socket"); | |
1437 | return; | |
1438 | } | |
1439 | ||
d62a17ae | 1440 | /* XXX: Socket should be NONBLOCK, however as we currently |
1441 | * discard failed writes, this will lead to inconsistencies. | |
1442 | * For now, socket must be blocking. | |
1443 | */ | |
1444 | /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) | |
1445 | zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ | |
1446 | ||
d62a17ae | 1447 | /* kernel_read needs rewrite. */ |
3801e764 | 1448 | thread_add_read(zrouter.master, kernel_read, NULL, routing_sock, NULL); |
718e3744 | 1449 | } |
1450 | ||
1451 | /* Exported interface function. This function simply calls | |
1452 | routing_socket (). */ | |
d62a17ae | 1453 | void kernel_init(struct zebra_ns *zns) |
8f7d9fc0 | 1454 | { |
d62a17ae | 1455 | routing_socket(zns); |
8f7d9fc0 FL |
1456 | } |
1457 | ||
62b8bb7a | 1458 | void kernel_terminate(struct zebra_ns *zns, bool complete) |
718e3744 | 1459 | { |
d62a17ae | 1460 | return; |
718e3744 | 1461 | } |
ddfeb486 DL |
1462 | |
1463 | #endif /* !HAVE_NETLINK */ |