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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 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
8ccc7e80 | 23 | #include <net/if_types.h> |
718e3744 | 24 | |
25 | #include "if.h" | |
26 | #include "prefix.h" | |
27 | #include "sockunion.h" | |
28 | #include "connected.h" | |
29 | #include "memory.h" | |
30 | #include "ioctl.h" | |
31 | #include "log.h" | |
32 | #include "str.h" | |
33 | #include "table.h" | |
34 | #include "rib.h" | |
edd7c245 | 35 | #include "privs.h" |
78104b9b | 36 | #include "vrf.h" |
718e3744 | 37 | |
38 | #include "zebra/interface.h" | |
39 | #include "zebra/zserv.h" | |
40 | #include "zebra/debug.h" | |
ec1a4283 | 41 | #include "zebra/kernel_socket.h" |
8f7d9fc0 | 42 | #include "zebra/rib.h" |
718e3744 | 43 | |
edd7c245 | 44 | extern struct zebra_privs_t zserv_privs; |
45 | ||
4bfbea8c | 46 | /* |
cfa0ed09 GT |
47 | * Historically, the BSD routing socket has aligned data following a |
48 | * struct sockaddr to sizeof(long), which was 4 bytes on some | |
49 | * platforms, and 8 bytes on others. NetBSD 6 changed the routing | |
50 | * socket to align to sizeof(uint64_t), which is 8 bytes. OS X | |
51 | * appears to align to sizeof(int), which is 4 bytes. | |
4bfbea8c | 52 | * |
cfa0ed09 GT |
53 | * Alignment of zero-sized sockaddrs is nonsensical, but historically |
54 | * BSD defines RT_ROUNDUP(0) to be the alignment interval (rather than | |
55 | * 0). We follow this practice without questioning it, but it is a | |
56 | * bug if quagga calls ROUNDUP with 0. | |
4bfbea8c | 57 | */ |
cfa0ed09 GT |
58 | |
59 | /* | |
60 | * Because of these varying conventions, the only sane approach is for | |
61 | * the <net/route.h> header to define some flavor of ROUNDUP macro. | |
62 | */ | |
e7f0e649 DL |
63 | |
64 | #if defined(SA_SIZE) | |
65 | /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */ | |
66 | #define SAROUNDUP(a) SA_SIZE(a) | |
67 | #else /* !SA_SIZE */ | |
68 | ||
cfa0ed09 GT |
69 | #if defined(RT_ROUNDUP) |
70 | #define ROUNDUP(a) RT_ROUNDUP(a) | |
71 | #endif /* defined(RT_ROUNDUP) */ | |
72 | ||
f7f9a982 DL |
73 | #if defined(SUNOS_5) |
74 | /* Solaris has struct sockaddr_in[6] definitions at 16 / 32 bytes size, | |
75 | * so the whole concept doesn't really apply. */ | |
76 | #define ROUNDUP(a) (a) | |
77 | #endif | |
78 | ||
cfa0ed09 GT |
79 | /* |
80 | * If ROUNDUP has not yet been defined in terms of platform-provided | |
81 | * defines, attempt to cope with heuristics. | |
82 | */ | |
83 | #if !defined(ROUNDUP) | |
84 | ||
85 | /* | |
86 | * It's a bug for a platform not to define rounding/alignment for | |
87 | * sockaddrs on the routing socket. This warning really is | |
88 | * intentional, to provoke filing bug reports with operating systems | |
89 | * that don't define RT_ROUNDUP or equivalent. | |
90 | */ | |
91 | #warning "net/route.h does not define RT_ROUNDUP; making unwarranted assumptions!" | |
92 | ||
93 | /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */ | |
3b33de67 | 94 | #ifdef __APPLE__ |
cfa0ed09 | 95 | #define ROUNDUP_TYPE int |
67320b26 GT |
96 | #else |
97 | #define ROUNDUP_TYPE long | |
3b33de67 | 98 | #endif |
718e3744 | 99 | |
cfa0ed09 GT |
100 | #define ROUNDUP(a) \ |
101 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(ROUNDUP_TYPE) - 1))) : sizeof(ROUNDUP_TYPE)) | |
102 | ||
103 | #endif /* defined(ROUNDUP) */ | |
104 | ||
4bfbea8c | 105 | /* |
106 | * Given a pointer (sockaddr or void *), return the number of bytes | |
107 | * taken up by the sockaddr and any padding needed for alignment. | |
108 | */ | |
6f0e3f6e | 109 | #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN) |
4bfbea8c | 110 | #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len) |
30be8028 | 111 | #elif defined(HAVE_IPV6) |
4bfbea8c | 112 | /* |
113 | * One would hope all fixed-size structure definitions are aligned, | |
114 | * but round them up nonetheless. | |
115 | */ | |
116 | #define SAROUNDUP(X) \ | |
3e95a074 | 117 | (((struct sockaddr *)(X))->sa_family == AF_INET ? \ |
118 | ROUNDUP(sizeof(struct sockaddr_in)):\ | |
119 | (((struct sockaddr *)(X))->sa_family == AF_INET6 ? \ | |
120 | ROUNDUP(sizeof(struct sockaddr_in6)) : \ | |
121 | (((struct sockaddr *)(X))->sa_family == AF_LINK ? \ | |
c50ae8ba | 122 | ROUNDUP(sizeof(struct sockaddr_dl)) : sizeof(struct sockaddr)))) |
30be8028 | 123 | #else /* HAVE_IPV6 */ |
4bfbea8c | 124 | #define SAROUNDUP(X) \ |
30be8028 | 125 | (((struct sockaddr *)(X))->sa_family == AF_INET ? \ |
126 | ROUNDUP(sizeof(struct sockaddr_in)):\ | |
127 | (((struct sockaddr *)(X))->sa_family == AF_LINK ? \ | |
128 | ROUNDUP(sizeof(struct sockaddr_dl)) : sizeof(struct sockaddr))) | |
6f0e3f6e | 129 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ |
718e3744 | 130 | |
e7f0e649 DL |
131 | #endif /* !SA_SIZE */ |
132 | ||
a05df8fd DV |
133 | /* |
134 | * We use a call to an inline function to copy (PNT) to (DEST) | |
135 | * 1. Calculating the length of the copy requires an #ifdef to determine | |
136 | * if sa_len is a field and can't be used directly inside a #define | |
137 | * 2. So the compiler doesn't complain when DEST is NULL, which is only true | |
138 | * when we are skipping the copy and incrementing to the next SA | |
ec1a4283 | 139 | */ |
07e54734 | 140 | static inline void |
a05df8fd DV |
141 | rta_copy (union sockunion *dest, caddr_t src) { |
142 | int len; | |
fb4ca3e7 DL |
143 | if (!dest) |
144 | return; | |
a05df8fd DV |
145 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
146 | len = (((struct sockaddr *)src)->sa_len > sizeof (*dest)) ? | |
147 | sizeof (*dest) : ((struct sockaddr *)src)->sa_len ; | |
148 | #else | |
149 | len = (SAROUNDUP (src) > sizeof (*dest)) ? | |
150 | sizeof (*dest) : SAROUNDUP (src) ; | |
151 | #endif | |
152 | memcpy (dest, src, len); | |
153 | } | |
154 | ||
62debbbe | 155 | #define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \ |
156 | if ((RTMADDRS) & (RTA)) \ | |
157 | { \ | |
158 | int len = SAROUNDUP ((PNT)); \ | |
fb4ca3e7 | 159 | if (af_check (((struct sockaddr *)(PNT))->sa_family)) \ |
a05df8fd | 160 | rta_copy((DEST), (PNT)); \ |
62debbbe | 161 | (PNT) += len; \ |
162 | } | |
163 | #define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \ | |
164 | if ((RTMADDRS) & (RTA)) \ | |
165 | { \ | |
166 | int len = SAROUNDUP ((PNT)); \ | |
fb4ca3e7 | 167 | rta_copy((DEST), (PNT)); \ |
62debbbe | 168 | (PNT) += len; \ |
169 | } | |
170 | ||
6fe70d1b | 171 | #define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \ |
172 | if ((RTMADDRS) & (RTA)) \ | |
173 | { \ | |
ec1a4283 | 174 | u_char *pdest = (u_char *) (DEST); \ |
6fe70d1b | 175 | int len = SAROUNDUP ((PNT)); \ |
176 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)(PNT); \ | |
177 | if (IS_ZEBRA_DEBUG_KERNEL) \ | |
178 | zlog_debug ("%s: RTA_SDL_GET nlen %d, alen %d", \ | |
179 | __func__, sdl->sdl_nlen, sdl->sdl_alen); \ | |
180 | if ( ((DEST) != NULL) && (sdl->sdl_family == AF_LINK) \ | |
181 | && (sdl->sdl_nlen < IFNAMSIZ) && (sdl->sdl_nlen <= len) ) \ | |
182 | { \ | |
ec1a4283 | 183 | memcpy (pdest, sdl->sdl_data, sdl->sdl_nlen); \ |
184 | pdest[sdl->sdl_nlen] = '\0'; \ | |
6fe70d1b | 185 | (LEN) = sdl->sdl_nlen; \ |
186 | } \ | |
187 | (PNT) += len; \ | |
188 | } \ | |
189 | else \ | |
190 | { \ | |
191 | (LEN) = 0; \ | |
192 | } | |
718e3744 | 193 | /* Routing socket message types. */ |
1423c809 | 194 | const struct message rtm_type_str[] = |
718e3744 | 195 | { |
196 | {RTM_ADD, "RTM_ADD"}, | |
197 | {RTM_DELETE, "RTM_DELETE"}, | |
198 | {RTM_CHANGE, "RTM_CHANGE"}, | |
199 | {RTM_GET, "RTM_GET"}, | |
200 | {RTM_LOSING, "RTM_LOSING"}, | |
201 | {RTM_REDIRECT, "RTM_REDIRECT"}, | |
202 | {RTM_MISS, "RTM_MISS"}, | |
203 | {RTM_LOCK, "RTM_LOCK"}, | |
9458b819 | 204 | #ifdef OLDADD |
718e3744 | 205 | {RTM_OLDADD, "RTM_OLDADD"}, |
9458b819 GT |
206 | #endif /* RTM_OLDADD */ |
207 | #ifdef RTM_OLDDEL | |
718e3744 | 208 | {RTM_OLDDEL, "RTM_OLDDEL"}, |
9458b819 | 209 | #endif /* RTM_OLDDEL */ |
718e3744 | 210 | {RTM_RESOLVE, "RTM_RESOLVE"}, |
211 | {RTM_NEWADDR, "RTM_NEWADDR"}, | |
212 | {RTM_DELADDR, "RTM_DELADDR"}, | |
213 | {RTM_IFINFO, "RTM_IFINFO"}, | |
214 | #ifdef RTM_OIFINFO | |
215 | {RTM_OIFINFO, "RTM_OIFINFO"}, | |
216 | #endif /* RTM_OIFINFO */ | |
217 | #ifdef RTM_NEWMADDR | |
218 | {RTM_NEWMADDR, "RTM_NEWMADDR"}, | |
219 | #endif /* RTM_NEWMADDR */ | |
220 | #ifdef RTM_DELMADDR | |
221 | {RTM_DELMADDR, "RTM_DELMADDR"}, | |
222 | #endif /* RTM_DELMADDR */ | |
223 | #ifdef RTM_IFANNOUNCE | |
224 | {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, | |
225 | #endif /* RTM_IFANNOUNCE */ | |
226 | {0, NULL} | |
227 | }; | |
228 | ||
ce0db9cb | 229 | static const struct message rtm_flag_str[] = |
718e3744 | 230 | { |
231 | {RTF_UP, "UP"}, | |
232 | {RTF_GATEWAY, "GATEWAY"}, | |
233 | {RTF_HOST, "HOST"}, | |
234 | {RTF_REJECT, "REJECT"}, | |
235 | {RTF_DYNAMIC, "DYNAMIC"}, | |
236 | {RTF_MODIFIED, "MODIFIED"}, | |
237 | {RTF_DONE, "DONE"}, | |
238 | #ifdef RTF_MASK | |
239 | {RTF_MASK, "MASK"}, | |
240 | #endif /* RTF_MASK */ | |
e6f148e6 | 241 | #ifdef RTF_CLONING |
718e3744 | 242 | {RTF_CLONING, "CLONING"}, |
e6f148e6 | 243 | #endif /* RTF_CLONING */ |
23b1f400 | 244 | #ifdef RTF_XRESOLVE |
718e3744 | 245 | {RTF_XRESOLVE, "XRESOLVE"}, |
23b1f400 | 246 | #endif /* RTF_XRESOLVE */ |
c54632ec | 247 | #ifdef RTF_LLINFO |
718e3744 | 248 | {RTF_LLINFO, "LLINFO"}, |
c54632ec | 249 | #endif /* RTF_LLINFO */ |
718e3744 | 250 | {RTF_STATIC, "STATIC"}, |
251 | {RTF_BLACKHOLE, "BLACKHOLE"}, | |
6fe70d1b | 252 | #ifdef RTF_PRIVATE |
253 | {RTF_PRIVATE, "PRIVATE"}, | |
254 | #endif /* RTF_PRIVATE */ | |
718e3744 | 255 | {RTF_PROTO1, "PROTO1"}, |
256 | {RTF_PROTO2, "PROTO2"}, | |
257 | #ifdef RTF_PRCLONING | |
258 | {RTF_PRCLONING, "PRCLONING"}, | |
259 | #endif /* RTF_PRCLONING */ | |
260 | #ifdef RTF_WASCLONED | |
261 | {RTF_WASCLONED, "WASCLONED"}, | |
262 | #endif /* RTF_WASCLONED */ | |
263 | #ifdef RTF_PROTO3 | |
264 | {RTF_PROTO3, "PROTO3"}, | |
265 | #endif /* RTF_PROTO3 */ | |
266 | #ifdef RTF_PINNED | |
267 | {RTF_PINNED, "PINNED"}, | |
268 | #endif /* RTF_PINNED */ | |
269 | #ifdef RTF_LOCAL | |
270 | {RTF_LOCAL, "LOCAL"}, | |
271 | #endif /* RTF_LOCAL */ | |
272 | #ifdef RTF_BROADCAST | |
273 | {RTF_BROADCAST, "BROADCAST"}, | |
274 | #endif /* RTF_BROADCAST */ | |
275 | #ifdef RTF_MULTICAST | |
276 | {RTF_MULTICAST, "MULTICAST"}, | |
277 | #endif /* RTF_MULTICAST */ | |
6fe70d1b | 278 | #ifdef RTF_MULTIRT |
279 | {RTF_MULTIRT, "MULTIRT"}, | |
280 | #endif /* RTF_MULTIRT */ | |
281 | #ifdef RTF_SETSRC | |
282 | {RTF_SETSRC, "SETSRC"}, | |
283 | #endif /* RTF_SETSRC */ | |
718e3744 | 284 | {0, NULL} |
285 | }; | |
286 | ||
287 | /* Kernel routing update socket. */ | |
288 | int routing_sock = -1; | |
289 | ||
290 | /* Yes I'm checking ugly routing socket behavior. */ | |
291 | /* #define DEBUG */ | |
292 | ||
293 | /* Supported address family check. */ | |
07e54734 | 294 | static inline int |
718e3744 | 295 | af_check (int family) |
296 | { | |
297 | if (family == AF_INET) | |
298 | return 1; | |
299 | #ifdef HAVE_IPV6 | |
300 | if (family == AF_INET6) | |
301 | return 1; | |
302 | #endif /* HAVE_IPV6 */ | |
303 | return 0; | |
304 | } | |
6b0655a2 | 305 | |
718e3744 | 306 | /* Dump routing table flag for debug purpose. */ |
b6178002 | 307 | static void |
718e3744 | 308 | rtm_flag_dump (int flag) |
309 | { | |
80b2a941 | 310 | const struct message *mes; |
718e3744 | 311 | static char buf[BUFSIZ]; |
312 | ||
cced60dd | 313 | buf[0] = '\0'; |
718e3744 | 314 | for (mes = rtm_flag_str; mes->key != 0; mes++) |
315 | { | |
316 | if (mes->key & flag) | |
317 | { | |
318 | strlcat (buf, mes->str, BUFSIZ); | |
319 | strlcat (buf, " ", BUFSIZ); | |
320 | } | |
321 | } | |
b6178002 | 322 | zlog_debug ("Kernel: %s", buf); |
718e3744 | 323 | } |
324 | ||
325 | #ifdef RTM_IFANNOUNCE | |
326 | /* Interface adding function */ | |
6621ca86 | 327 | static int |
718e3744 | 328 | ifan_read (struct if_announcemsghdr *ifan) |
329 | { | |
330 | struct interface *ifp; | |
6fe70d1b | 331 | |
718e3744 | 332 | ifp = if_lookup_by_index (ifan->ifan_index); |
6fe70d1b | 333 | |
334 | if (ifp) | |
335 | assert ( (ifp->ifindex == ifan->ifan_index) | |
336 | || (ifp->ifindex == IFINDEX_INTERNAL) ); | |
337 | ||
ec1a4283 | 338 | if ( (ifp == NULL) |
339 | || ((ifp->ifindex == IFINDEX_INTERNAL) | |
340 | && (ifan->ifan_what == IFAN_ARRIVAL)) ) | |
718e3744 | 341 | { |
6fe70d1b | 342 | if (IS_ZEBRA_DEBUG_KERNEL) |
343 | zlog_debug ("%s: creating interface for ifindex %d, name %s", | |
344 | __func__, ifan->ifan_index, ifan->ifan_name); | |
345 | ||
718e3744 | 346 | /* Create Interface */ |
08dbfb69 | 347 | ifp = if_get_by_name_len(ifan->ifan_name, |
348 | strnlen(ifan->ifan_name, | |
349 | sizeof(ifan->ifan_name))); | |
718e3744 | 350 | ifp->ifindex = ifan->ifan_index; |
351 | ||
1db65fad | 352 | if_get_metric (ifp); |
718e3744 | 353 | if_add_update (ifp); |
354 | } | |
355 | else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) | |
6eb8827d | 356 | if_delete_update (ifp); |
718e3744 | 357 | |
358 | if_get_flags (ifp); | |
359 | if_get_mtu (ifp); | |
360 | if_get_metric (ifp); | |
361 | ||
362 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe70d1b | 363 | zlog_debug ("%s: interface %s index %d", |
364 | __func__, ifan->ifan_name, ifan->ifan_index); | |
718e3744 | 365 | |
366 | return 0; | |
367 | } | |
368 | #endif /* RTM_IFANNOUNCE */ | |
369 | ||
9234b382 | 370 | #ifdef HAVE_BSD_IFI_LINK_STATE |
c543a173 AS |
371 | /* BSD link detect translation */ |
372 | static void | |
373 | bsd_linkdetect_translate (struct if_msghdr *ifm) | |
374 | { | |
55edb0d4 AS |
375 | if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) || |
376 | (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) | |
c543a173 AS |
377 | SET_FLAG(ifm->ifm_flags, IFF_RUNNING); |
378 | else | |
379 | UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
380 | } | |
9234b382 | 381 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 382 | |
8ccc7e80 TT |
383 | static enum zebra_link_type |
384 | sdl_to_zebra_link_type (unsigned int sdlt) | |
385 | { | |
386 | switch (sdlt) | |
387 | { | |
388 | case IFT_ETHER: return ZEBRA_LLT_ETHER; | |
389 | case IFT_X25: return ZEBRA_LLT_X25; | |
390 | case IFT_FDDI: return ZEBRA_LLT_FDDI; | |
391 | case IFT_PPP: return ZEBRA_LLT_PPP; | |
392 | case IFT_LOOP: return ZEBRA_LLT_LOOPBACK; | |
393 | case IFT_SLIP: return ZEBRA_LLT_SLIP; | |
394 | case IFT_ARCNET: return ZEBRA_LLT_ARCNET; | |
395 | case IFT_ATM: return ZEBRA_LLT_ATM; | |
396 | case IFT_LOCALTALK: return ZEBRA_LLT_LOCALTLK; | |
397 | case IFT_HIPPI: return ZEBRA_LLT_HIPPI; | |
398 | #ifdef IFT_IEEE1394 | |
399 | case IFT_IEEE1394: return ZEBRA_LLT_IEEE1394; | |
400 | #endif | |
401 | ||
402 | default: return ZEBRA_LLT_UNKNOWN; | |
403 | } | |
404 | } | |
405 | ||
da26e3b6 | 406 | /* |
407 | * Handle struct if_msghdr obtained from reading routing socket or | |
408 | * sysctl (from interface_list). There may or may not be sockaddrs | |
409 | * present after the header. | |
410 | */ | |
ec1a4283 | 411 | int |
718e3744 | 412 | ifm_read (struct if_msghdr *ifm) |
413 | { | |
3e95a074 | 414 | struct interface *ifp = NULL; |
a34eb368 | 415 | struct sockaddr_dl *sdl; |
6fe70d1b | 416 | char ifname[IFNAMSIZ]; |
417 | short ifnlen = 0; | |
a05df8fd | 418 | caddr_t cp; |
6fe70d1b | 419 | |
420 | /* terminate ifname at head (for strnlen) and tail (for safety) */ | |
421 | ifname[IFNAMSIZ - 1] = '\0'; | |
422 | ||
da26e3b6 | 423 | /* paranoia: sanity check structure */ |
424 | if (ifm->ifm_msglen < sizeof(struct if_msghdr)) | |
425 | { | |
426 | zlog_err ("ifm_read: ifm->ifm_msglen %d too short\n", | |
427 | ifm->ifm_msglen); | |
428 | return -1; | |
429 | } | |
430 | ||
431 | /* | |
4bfbea8c | 432 | * Check for a sockaddr_dl following the message. First, point to |
433 | * where a socakddr might be if one follows the message. | |
da26e3b6 | 434 | */ |
4bfbea8c | 435 | cp = (void *)(ifm + 1); |
718e3744 | 436 | |
4bfbea8c | 437 | #ifdef SUNOS_5 |
3e95a074 | 438 | /* |
4bfbea8c | 439 | * XXX This behavior should be narrowed to only the kernel versions |
440 | * for which the structures returned do not match the headers. | |
441 | * | |
3e95a074 | 442 | * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions |
4bfbea8c | 443 | * is 12 bytes larger than the 32 bit version. |
3e95a074 | 444 | */ |
4bfbea8c | 445 | if (((struct sockaddr *) cp)->sa_family == AF_UNSPEC) |
3e95a074 | 446 | cp = cp + 12; |
4bfbea8c | 447 | #endif |
3e95a074 | 448 | |
6fe70d1b | 449 | RTA_ADDR_GET (NULL, RTA_DST, ifm->ifm_addrs, cp); |
450 | RTA_ADDR_GET (NULL, RTA_GATEWAY, ifm->ifm_addrs, cp); | |
451 | RTA_ATTR_GET (NULL, RTA_NETMASK, ifm->ifm_addrs, cp); | |
452 | RTA_ADDR_GET (NULL, RTA_GENMASK, ifm->ifm_addrs, cp); | |
a34eb368 | 453 | sdl = (struct sockaddr_dl *)cp; |
6fe70d1b | 454 | RTA_NAME_GET (ifname, RTA_IFP, ifm->ifm_addrs, cp, ifnlen); |
455 | RTA_ADDR_GET (NULL, RTA_IFA, ifm->ifm_addrs, cp); | |
456 | RTA_ADDR_GET (NULL, RTA_AUTHOR, ifm->ifm_addrs, cp); | |
457 | RTA_ADDR_GET (NULL, RTA_BRD, ifm->ifm_addrs, cp); | |
458 | ||
459 | if (IS_ZEBRA_DEBUG_KERNEL) | |
460 | zlog_debug ("%s: sdl ifname %s", __func__, (ifnlen ? ifname : "(nil)")); | |
461 | ||
4bfbea8c | 462 | /* |
6fe70d1b | 463 | * Look up on ifindex first, because ifindices are the primary handle for |
464 | * interfaces across the user/kernel boundary, for most systems. (Some | |
465 | * messages, such as up/down status changes on NetBSD, do not include a | |
466 | * sockaddr_dl). | |
4bfbea8c | 467 | */ |
6fe70d1b | 468 | if ( (ifp = if_lookup_by_index (ifm->ifm_index)) != NULL ) |
3e95a074 | 469 | { |
6fe70d1b | 470 | /* we have an ifp, verify that the name matches as some systems, |
471 | * eg Solaris, have a 1:many association of ifindex:ifname | |
472 | * if they dont match, we dont have the correct ifp and should | |
473 | * set it back to NULL to let next check do lookup by name | |
474 | */ | |
475 | if (ifnlen && (strncmp (ifp->name, ifname, IFNAMSIZ) != 0) ) | |
3e95a074 | 476 | { |
6fe70d1b | 477 | if (IS_ZEBRA_DEBUG_KERNEL) |
478 | zlog_debug ("%s: ifp name %s doesnt match sdl name %s", | |
479 | __func__, ifp->name, ifname); | |
480 | ifp = NULL; | |
3e95a074 | 481 | } |
482 | } | |
6fe70d1b | 483 | |
3e95a074 | 484 | /* |
6fe70d1b | 485 | * If we dont have an ifp, try looking up by name. Particularly as some |
486 | * systems (Solaris) have a 1:many mapping of ifindex:ifname - the ifname | |
487 | * is therefore our unique handle to that interface. | |
488 | * | |
489 | * Interfaces specified in the configuration file for which the ifindex | |
490 | * has not been determined will have ifindex == IFINDEX_INTERNAL, and such | |
491 | * interfaces are found by this search, and then their ifindex values can | |
492 | * be filled in. | |
3e95a074 | 493 | */ |
6fe70d1b | 494 | if ( (ifp == NULL) && ifnlen) |
495 | ifp = if_lookup_by_name (ifname); | |
718e3744 | 496 | |
da26e3b6 | 497 | /* |
6fe70d1b | 498 | * If ifp still does not exist or has an invalid index (IFINDEX_INTERNAL), |
499 | * create or fill in an interface. | |
da26e3b6 | 500 | */ |
d2fc8896 | 501 | if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) |
718e3744 | 502 | { |
da26e3b6 | 503 | /* |
4bfbea8c | 504 | * To create or fill in an interface, a sockaddr_dl (via |
505 | * RTA_IFP) is required. | |
da26e3b6 | 506 | */ |
6fe70d1b | 507 | if (!ifnlen) |
da26e3b6 | 508 | { |
6fe70d1b | 509 | zlog_warn ("Interface index %d (new) missing ifname\n", |
4bfbea8c | 510 | ifm->ifm_index); |
da26e3b6 | 511 | return -1; |
512 | } | |
5c78b3d0 | 513 | |
514 | #ifndef RTM_IFANNOUNCE | |
515 | /* Down->Down interface should be ignored here. | |
516 | * See further comment below. | |
517 | */ | |
518 | if (!CHECK_FLAG (ifm->ifm_flags, IFF_UP)) | |
519 | return 0; | |
520 | #endif /* !RTM_IFANNOUNCE */ | |
6fe70d1b | 521 | |
3e95a074 | 522 | if (ifp == NULL) |
6fe70d1b | 523 | { |
524 | /* Interface that zebra was not previously aware of, so create. */ | |
525 | ifp = if_create (ifname, ifnlen); | |
526 | if (IS_ZEBRA_DEBUG_KERNEL) | |
527 | zlog_debug ("%s: creating ifp for ifindex %d", | |
528 | __func__, ifm->ifm_index); | |
529 | } | |
718e3744 | 530 | |
6fe70d1b | 531 | if (IS_ZEBRA_DEBUG_KERNEL) |
532 | zlog_debug ("%s: updated/created ifp, ifname %s, ifindex %d", | |
533 | __func__, ifp->name, ifp->ifindex); | |
4bfbea8c | 534 | /* |
535 | * Fill in newly created interface structure, or larval | |
d2fc8896 | 536 | * structure with ifindex IFINDEX_INTERNAL. |
4bfbea8c | 537 | */ |
718e3744 | 538 | ifp->ifindex = ifm->ifm_index; |
c543a173 | 539 | |
9234b382 | 540 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
c543a173 | 541 | bsd_linkdetect_translate(ifm); |
9234b382 | 542 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 543 | |
5c78b3d0 | 544 | if_flags_update (ifp, ifm->ifm_flags); |
718e3744 | 545 | #if defined(__bsdi__) |
546 | if_kvm_get_mtu (ifp); | |
547 | #else | |
548 | if_get_mtu (ifp); | |
549 | #endif /* __bsdi__ */ | |
550 | if_get_metric (ifp); | |
551 | ||
a34eb368 TG |
552 | /* |
553 | * XXX sockaddr_dl contents can be larger than the structure | |
ca3ccd87 DL |
554 | * definition. There are 2 big families here: |
555 | * - BSD has sdl_len + sdl_data[16] + overruns sdl_data | |
556 | * we MUST use sdl_len here or we'll truncate data. | |
557 | * - Solaris has no sdl_len, but sdl_data[244] | |
558 | * presumably, it's not going to run past that, so sizeof() | |
559 | * is fine here. | |
a34eb368 TG |
560 | * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid |
561 | */ | |
8ccc7e80 TT |
562 | ifp->ll_type = ZEBRA_LLT_UNKNOWN; |
563 | ifp->hw_addr_len = 0; | |
a34eb368 | 564 | if (ifnlen) |
8ccc7e80 | 565 | { |
ca3ccd87 | 566 | #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN |
8ccc7e80 | 567 | memcpy (&((struct zebra_if *)ifp->info)->sdl, sdl, sdl->sdl_len); |
ca3ccd87 | 568 | #else |
8ccc7e80 | 569 | memcpy (&((struct zebra_if *)ifp->info)->sdl, sdl, sizeof (struct sockaddr_dl)); |
ca3ccd87 | 570 | #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */ |
8ccc7e80 TT |
571 | |
572 | ifp->ll_type = sdl_to_zebra_link_type (sdl->sdl_type); | |
573 | if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) | |
574 | { | |
575 | memcpy (ifp->hw_addr, LLADDR(sdl), sdl->sdl_alen); | |
576 | ifp->hw_addr_len = sdl->sdl_alen; | |
577 | } | |
578 | } | |
a34eb368 | 579 | |
718e3744 | 580 | if_add_update (ifp); |
581 | } | |
582 | else | |
da26e3b6 | 583 | /* |
584 | * Interface structure exists. Adjust stored flags from | |
585 | * notification. If interface has up->down or down->up | |
586 | * transition, call state change routines (to adjust routes, | |
587 | * notify routing daemons, etc.). (Other flag changes are stored | |
588 | * but apparently do not trigger action.) | |
589 | */ | |
718e3744 | 590 | { |
6fe70d1b | 591 | if (ifp->ifindex != ifm->ifm_index) |
592 | { | |
593 | zlog_warn ("%s: index mismatch, ifname %s, ifp index %d, " | |
594 | "ifm index %d", | |
595 | __func__, ifp->name, ifp->ifindex, ifm->ifm_index); | |
596 | return -1; | |
597 | } | |
598 | ||
9234b382 | 599 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
c543a173 | 600 | bsd_linkdetect_translate(ifm); |
9234b382 | 601 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 602 | |
5c78b3d0 | 603 | /* update flags and handle operative->inoperative transition, if any */ |
604 | if_flags_update (ifp, ifm->ifm_flags); | |
605 | ||
6eb8827d | 606 | #ifndef RTM_IFANNOUNCE |
5c78b3d0 | 607 | if (!if_is_up (ifp)) |
608 | { | |
609 | /* No RTM_IFANNOUNCE on this platform, so we can never | |
610 | * distinguish between ~IFF_UP and delete. We must presume | |
611 | * it has been deleted. | |
612 | * Eg, Solaris will not notify us of unplumb. | |
613 | * | |
614 | * XXX: Fixme - this should be runtime detected | |
615 | * So that a binary compiled on a system with IFANNOUNCE | |
616 | * will still behave correctly if run on a platform without | |
617 | */ | |
618 | if_delete_update (ifp); | |
619 | } | |
6eb8827d | 620 | #endif /* RTM_IFANNOUNCE */ |
1ba27564 DO |
621 | if (if_is_up (ifp)) |
622 | { | |
623 | #if defined(__bsdi__) | |
624 | if_kvm_get_mtu (ifp); | |
625 | #else | |
626 | if_get_mtu (ifp); | |
627 | #endif /* __bsdi__ */ | |
628 | if_get_metric (ifp); | |
629 | } | |
718e3744 | 630 | } |
5c78b3d0 | 631 | |
718e3744 | 632 | #ifdef HAVE_NET_RT_IFLIST |
633 | ifp->stats = ifm->ifm_data; | |
634 | #endif /* HAVE_NET_RT_IFLIST */ | |
635 | ||
636 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe70d1b | 637 | zlog_debug ("%s: interface %s index %d", |
638 | __func__, ifp->name, ifp->ifindex); | |
718e3744 | 639 | |
640 | return 0; | |
641 | } | |
6b0655a2 | 642 | |
718e3744 | 643 | /* Address read from struct ifa_msghdr. */ |
6621ca86 | 644 | static void |
718e3744 | 645 | ifam_read_mesg (struct ifa_msghdr *ifm, |
646 | union sockunion *addr, | |
647 | union sockunion *mask, | |
6fe70d1b | 648 | union sockunion *brd, |
649 | char *ifname, | |
650 | short *ifnlen) | |
718e3744 | 651 | { |
652 | caddr_t pnt, end; | |
7ab62c53 AS |
653 | union sockunion dst; |
654 | union sockunion gateway; | |
718e3744 | 655 | |
656 | pnt = (caddr_t)(ifm + 1); | |
657 | end = ((caddr_t)ifm) + ifm->ifam_msglen; | |
658 | ||
718e3744 | 659 | /* Be sure structure is cleared */ |
660 | memset (mask, 0, sizeof (union sockunion)); | |
661 | memset (addr, 0, sizeof (union sockunion)); | |
6621ca86 | 662 | memset (brd, 0, sizeof (union sockunion)); |
7ab62c53 AS |
663 | memset (&dst, 0, sizeof (union sockunion)); |
664 | memset (&gateway, 0, sizeof (union sockunion)); | |
718e3744 | 665 | |
666 | /* We fetch each socket variable into sockunion. */ | |
7ab62c53 AS |
667 | RTA_ADDR_GET (&dst, RTA_DST, ifm->ifam_addrs, pnt); |
668 | RTA_ADDR_GET (&gateway, RTA_GATEWAY, ifm->ifam_addrs, pnt); | |
62debbbe | 669 | RTA_ATTR_GET (mask, RTA_NETMASK, ifm->ifam_addrs, pnt); |
670 | RTA_ADDR_GET (NULL, RTA_GENMASK, ifm->ifam_addrs, pnt); | |
6fe70d1b | 671 | RTA_NAME_GET (ifname, RTA_IFP, ifm->ifam_addrs, pnt, *ifnlen); |
62debbbe | 672 | RTA_ADDR_GET (addr, RTA_IFA, ifm->ifam_addrs, pnt); |
673 | RTA_ADDR_GET (NULL, RTA_AUTHOR, ifm->ifam_addrs, pnt); | |
6fe70d1b | 674 | RTA_ADDR_GET (brd, RTA_BRD, ifm->ifam_addrs, pnt); |
718e3744 | 675 | |
6fe70d1b | 676 | if (IS_ZEBRA_DEBUG_KERNEL) |
55196042 | 677 | { |
35d921cc TT |
678 | int family = sockunion_family(addr); |
679 | switch (family) | |
55196042 AS |
680 | { |
681 | case AF_INET: | |
55196042 AS |
682 | #ifdef HAVE_IPV6 |
683 | case AF_INET6: | |
35d921cc | 684 | #endif |
55196042 | 685 | { |
7ab62c53 | 686 | char buf[4][INET6_ADDRSTRLEN]; |
55196042 | 687 | zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x, " |
7ab62c53 AS |
688 | "ifam_flags 0x%x, addr %s/%d broad %s dst %s " |
689 | "gateway %s", | |
35d921cc | 690 | __func__, ifm->ifam_index, |
55196042 | 691 | (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs, |
7ab62c53 | 692 | ifm->ifam_flags, |
35d921cc | 693 | inet_ntop(family,&addr->sin.sin_addr, |
55196042 | 694 | buf[0],sizeof(buf[0])), |
35d921cc TT |
695 | ip_masklen(mask->sin.sin_addr), |
696 | inet_ntop(family,&brd->sin.sin_addr, | |
7ab62c53 | 697 | buf[1],sizeof(buf[1])), |
35d921cc | 698 | inet_ntop(family,&dst.sin.sin_addr, |
7ab62c53 | 699 | buf[2],sizeof(buf[2])), |
35d921cc | 700 | inet_ntop(family,&gateway.sin.sin_addr, |
7ab62c53 | 701 | buf[3],sizeof(buf[3]))); |
55196042 AS |
702 | } |
703 | break; | |
55196042 AS |
704 | default: |
705 | zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x", | |
706 | __func__, ifm->ifam_index, | |
707 | (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs); | |
708 | break; | |
709 | } | |
710 | } | |
7ab62c53 | 711 | |
718e3744 | 712 | /* Assert read up end point matches to end point */ |
713 | if (pnt != end) | |
85a2ebf2 | 714 | zlog_warn ("ifam_read() doesn't read all socket data"); |
718e3744 | 715 | } |
716 | ||
717 | /* Interface's address information get. */ | |
ec1a4283 | 718 | int |
718e3744 | 719 | ifam_read (struct ifa_msghdr *ifam) |
720 | { | |
6fe70d1b | 721 | struct interface *ifp = NULL; |
0752ef0b | 722 | union sockunion addr, mask, brd; |
6fe70d1b | 723 | char ifname[INTERFACE_NAMSIZ]; |
724 | short ifnlen = 0; | |
725 | char isalias = 0; | |
7ab62c53 | 726 | int flags = 0; |
6fe70d1b | 727 | |
728 | ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; | |
729 | ||
730 | /* Allocate and read address information. */ | |
731 | ifam_read_mesg (ifam, &addr, &mask, &brd, ifname, &ifnlen); | |
732 | ||
733 | if ((ifp = if_lookup_by_index(ifam->ifam_index)) == NULL) | |
718e3744 | 734 | { |
6fe70d1b | 735 | zlog_warn ("%s: no interface for ifname %s, index %d", |
736 | __func__, ifname, ifam->ifam_index); | |
718e3744 | 737 | return -1; |
738 | } | |
6fe70d1b | 739 | |
740 | if (ifnlen && strncmp (ifp->name, ifname, INTERFACE_NAMSIZ)) | |
741 | isalias = 1; | |
742 | ||
7ab62c53 AS |
743 | /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD |
744 | field contains a broadcast address or a peer address, so we are forced to | |
745 | rely upon the interface type. */ | |
746 | if (if_is_pointopoint(ifp)) | |
747 | SET_FLAG(flags, ZEBRA_IFA_PEER); | |
748 | ||
6502208c PJ |
749 | #if 0 |
750 | /* it might seem cute to grab the interface metric here, however | |
751 | * we're processing an address update message, and so some systems | |
752 | * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left | |
753 | * in deliberately, as comment. | |
754 | */ | |
d34b8991 | 755 | ifp->metric = ifam->ifam_metric; |
6502208c PJ |
756 | #endif |
757 | ||
718e3744 | 758 | /* Add connected address. */ |
759 | switch (sockunion_family (&addr)) | |
760 | { | |
761 | case AF_INET: | |
762 | if (ifam->ifam_type == RTM_NEWADDR) | |
7ab62c53 | 763 | connected_add_ipv4 (ifp, flags, &addr.sin.sin_addr, |
718e3744 | 764 | ip_masklen (mask.sin.sin_addr), |
d34b8991 | 765 | &brd.sin.sin_addr, |
766 | (isalias ? ifname : NULL)); | |
718e3744 | 767 | else |
7ab62c53 | 768 | connected_delete_ipv4 (ifp, flags, &addr.sin.sin_addr, |
718e3744 | 769 | ip_masklen (mask.sin.sin_addr), |
0752ef0b | 770 | &brd.sin.sin_addr); |
718e3744 | 771 | break; |
772 | #ifdef HAVE_IPV6 | |
773 | case AF_INET6: | |
774 | /* Unset interface index from link-local address when IPv6 stack | |
775 | is KAME. */ | |
776 | if (IN6_IS_ADDR_LINKLOCAL (&addr.sin6.sin6_addr)) | |
fb4ca3e7 DL |
777 | { |
778 | SET_IN6_LINKLOCAL_IFINDEX (addr.sin6.sin6_addr, 0); | |
779 | } | |
718e3744 | 780 | |
781 | if (ifam->ifam_type == RTM_NEWADDR) | |
7ab62c53 | 782 | connected_add_ipv6 (ifp, flags, &addr.sin6.sin6_addr, |
718e3744 | 783 | ip6_masklen (mask.sin6.sin6_addr), |
d34b8991 | 784 | &brd.sin6.sin6_addr, |
785 | (isalias ? ifname : NULL)); | |
718e3744 | 786 | else |
787 | connected_delete_ipv6 (ifp, | |
788 | &addr.sin6.sin6_addr, | |
789 | ip6_masklen (mask.sin6.sin6_addr), | |
0752ef0b | 790 | &brd.sin6.sin6_addr); |
718e3744 | 791 | break; |
792 | #endif /* HAVE_IPV6 */ | |
793 | default: | |
794 | /* Unsupported family silently ignore... */ | |
795 | break; | |
796 | } | |
5c78b3d0 | 797 | |
798 | /* Check interface flag for implicit up of the interface. */ | |
799 | if_refresh (ifp); | |
800 | ||
801 | #ifdef SUNOS_5 | |
802 | /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange. | |
803 | * See comments for SUNOS_5 in interface.c::if_flags_mangle. | |
804 | * | |
805 | * Here we take care of case where the real IFF_UP was previously | |
806 | * unset (as kept in struct zebra_if.primary_state) and the mangled | |
807 | * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned | |
808 | * to unset due to the lost non-primary address having DELADDR'd. | |
809 | * | |
810 | * we must delete the interface, because in between here and next | |
811 | * event for this interface-name the administrator could unplumb | |
812 | * and replumb the interface. | |
813 | */ | |
814 | if (!if_is_up (ifp)) | |
815 | if_delete_update (ifp); | |
816 | #endif /* SUNOS_5 */ | |
817 | ||
718e3744 | 818 | return 0; |
819 | } | |
6b0655a2 | 820 | |
718e3744 | 821 | /* Interface function for reading kernel routing table information. */ |
6621ca86 | 822 | static int |
718e3744 | 823 | rtm_read_mesg (struct rt_msghdr *rtm, |
824 | union sockunion *dest, | |
825 | union sockunion *mask, | |
6fe70d1b | 826 | union sockunion *gate, |
827 | char *ifname, | |
828 | short *ifnlen) | |
718e3744 | 829 | { |
830 | caddr_t pnt, end; | |
831 | ||
832 | /* Pnt points out socket data start point. */ | |
833 | pnt = (caddr_t)(rtm + 1); | |
834 | end = ((caddr_t)rtm) + rtm->rtm_msglen; | |
835 | ||
836 | /* rt_msghdr version check. */ | |
837 | if (rtm->rtm_version != RTM_VERSION) | |
838 | zlog (NULL, LOG_WARNING, | |
839 | "Routing message version different %d should be %d." | |
840 | "This may cause problem\n", rtm->rtm_version, RTM_VERSION); | |
62debbbe | 841 | |
718e3744 | 842 | /* Be sure structure is cleared */ |
843 | memset (dest, 0, sizeof (union sockunion)); | |
844 | memset (gate, 0, sizeof (union sockunion)); | |
845 | memset (mask, 0, sizeof (union sockunion)); | |
846 | ||
847 | /* We fetch each socket variable into sockunion. */ | |
62debbbe | 848 | RTA_ADDR_GET (dest, RTA_DST, rtm->rtm_addrs, pnt); |
849 | RTA_ADDR_GET (gate, RTA_GATEWAY, rtm->rtm_addrs, pnt); | |
850 | RTA_ATTR_GET (mask, RTA_NETMASK, rtm->rtm_addrs, pnt); | |
851 | RTA_ADDR_GET (NULL, RTA_GENMASK, rtm->rtm_addrs, pnt); | |
6fe70d1b | 852 | RTA_NAME_GET (ifname, RTA_IFP, rtm->rtm_addrs, pnt, *ifnlen); |
62debbbe | 853 | RTA_ADDR_GET (NULL, RTA_IFA, rtm->rtm_addrs, pnt); |
854 | RTA_ADDR_GET (NULL, RTA_AUTHOR, rtm->rtm_addrs, pnt); | |
855 | RTA_ADDR_GET (NULL, RTA_BRD, rtm->rtm_addrs, pnt); | |
718e3744 | 856 | |
857 | /* If there is netmask information set it's family same as | |
858 | destination family*/ | |
859 | if (rtm->rtm_addrs & RTA_NETMASK) | |
860 | mask->sa.sa_family = dest->sa.sa_family; | |
861 | ||
862 | /* Assert read up to the end of pointer. */ | |
863 | if (pnt != end) | |
85a2ebf2 | 864 | zlog (NULL, LOG_WARNING, "rtm_read() doesn't read all socket data."); |
718e3744 | 865 | |
866 | return rtm->rtm_flags; | |
867 | } | |
868 | ||
ec1a4283 | 869 | void |
718e3744 | 870 | rtm_read (struct rt_msghdr *rtm) |
871 | { | |
872 | int flags; | |
873 | u_char zebra_flags; | |
874 | union sockunion dest, mask, gate; | |
6fe70d1b | 875 | char ifname[INTERFACE_NAMSIZ + 1]; |
876 | short ifnlen = 0; | |
718e3744 | 877 | |
878 | zebra_flags = 0; | |
879 | ||
718e3744 | 880 | /* Read destination and netmask and gateway from rtm message |
881 | structure. */ | |
6fe70d1b | 882 | flags = rtm_read_mesg (rtm, &dest, &mask, &gate, ifname, &ifnlen); |
6da59801 DO |
883 | if (!(flags & RTF_DONE)) |
884 | return; | |
dc95824a DO |
885 | if (IS_ZEBRA_DEBUG_KERNEL) |
886 | zlog_debug ("%s: got rtm of type %d (%s)", __func__, rtm->rtm_type, | |
2d844524 | 887 | lookup (rtm_type_str, rtm->rtm_type)); |
718e3744 | 888 | |
889 | #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ | |
890 | if (flags & RTF_CLONED) | |
891 | return; | |
892 | #endif | |
893 | #ifdef RTF_WASCLONED /*freebsd*/ | |
894 | if (flags & RTF_WASCLONED) | |
895 | return; | |
896 | #endif | |
897 | ||
898 | if ((rtm->rtm_type == RTM_ADD) && ! (flags & RTF_UP)) | |
899 | return; | |
900 | ||
901 | /* This is connected route. */ | |
902 | if (! (flags & RTF_GATEWAY)) | |
903 | return; | |
904 | ||
905 | if (flags & RTF_PROTO1) | |
906 | SET_FLAG (zebra_flags, ZEBRA_FLAG_SELFROUTE); | |
907 | ||
908 | /* This is persistent route. */ | |
909 | if (flags & RTF_STATIC) | |
910 | SET_FLAG (zebra_flags, ZEBRA_FLAG_STATIC); | |
911 | ||
81dfcaa2 | 912 | /* This is a reject or blackhole route */ |
913 | if (flags & RTF_REJECT) | |
914 | SET_FLAG (zebra_flags, ZEBRA_FLAG_REJECT); | |
915 | if (flags & RTF_BLACKHOLE) | |
916 | SET_FLAG (zebra_flags, ZEBRA_FLAG_BLACKHOLE); | |
917 | ||
718e3744 | 918 | if (dest.sa.sa_family == AF_INET) |
919 | { | |
616368ed | 920 | struct prefix p; |
718e3744 | 921 | |
922 | p.family = AF_INET; | |
616368ed | 923 | p.u.prefix4 = dest.sin.sin_addr; |
718e3744 | 924 | if (flags & RTF_HOST) |
925 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
926 | else | |
927 | p.prefixlen = ip_masklen (mask.sin.sin_addr); | |
ca16218d | 928 | |
dc95824a DO |
929 | /* Catch self originated messages and match them against our current RIB. |
930 | * At the same time, ignore unconfirmed messages, they should be tracked | |
931 | * by rtm_write() and kernel_rtm_ipv4(). | |
932 | */ | |
96934e6a | 933 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) |
dc95824a | 934 | { |
35d921cc | 935 | char buf[PREFIX_STRLEN], gate_buf[INET_ADDRSTRLEN]; |
dc95824a | 936 | int ret; |
dc95824a DO |
937 | if (! IS_ZEBRA_DEBUG_RIB) |
938 | return; | |
78104b9b FL |
939 | ret = rib_lookup_ipv4_route (&p, &gate, VRF_DEFAULT); |
940 | prefix2str (&p, buf, sizeof(buf)); | |
dc95824a DO |
941 | switch (rtm->rtm_type) |
942 | { | |
943 | case RTM_ADD: | |
944 | case RTM_GET: | |
945 | case RTM_CHANGE: | |
946 | /* The kernel notifies us about a new route in FIB created by us. | |
947 | Do we have a correspondent entry in our RIB? */ | |
948 | switch (ret) | |
949 | { | |
950 | case ZEBRA_RIB_NOTFOUND: | |
35d921cc TT |
951 | zlog_debug ("%s: %s %s: desync: RR isn't yet in RIB, while already in FIB", |
952 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
dc95824a DO |
953 | break; |
954 | case ZEBRA_RIB_FOUND_CONNECTED: | |
955 | case ZEBRA_RIB_FOUND_NOGATE: | |
956 | inet_ntop (AF_INET, &gate.sin.sin_addr, gate_buf, INET_ADDRSTRLEN); | |
35d921cc TT |
957 | zlog_debug ("%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)", |
958 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf, gate_buf); | |
dc95824a DO |
959 | break; |
960 | case ZEBRA_RIB_FOUND_EXACT: /* RIB RR == FIB RR */ | |
35d921cc TT |
961 | zlog_debug ("%s: %s %s: done Ok", |
962 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 963 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
964 | return; |
965 | break; | |
966 | } | |
967 | break; | |
968 | case RTM_DELETE: | |
969 | /* The kernel notifies us about a route deleted by us. Do we still | |
970 | have it in the RIB? Do we have anything instead? */ | |
971 | switch (ret) | |
972 | { | |
973 | case ZEBRA_RIB_FOUND_EXACT: | |
35d921cc TT |
974 | zlog_debug ("%s: %s %s: desync: RR is still in RIB, while already not in FIB", |
975 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 976 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
977 | break; |
978 | case ZEBRA_RIB_FOUND_CONNECTED: | |
979 | case ZEBRA_RIB_FOUND_NOGATE: | |
35d921cc TT |
980 | zlog_debug ("%s: %s %s: desync: RR is still in RIB, plus gate differs", |
981 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 982 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
983 | break; |
984 | case ZEBRA_RIB_NOTFOUND: /* RIB RR == FIB RR */ | |
35d921cc TT |
985 | zlog_debug ("%s: %s %s: done Ok", |
986 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 987 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
988 | return; |
989 | break; | |
990 | } | |
991 | break; | |
992 | default: | |
35d921cc TT |
993 | zlog_debug ("%s: %s: warning: loopback RTM of type %s received", |
994 | __func__, buf, lookup (rtm_type_str, rtm->rtm_type)); | |
dc95824a DO |
995 | } |
996 | return; | |
997 | } | |
998 | ||
ca16218d | 999 | /* Change, delete the old prefix, we have no further information |
1000 | * to specify the route really | |
1001 | */ | |
1002 | if (rtm->rtm_type == RTM_CHANGE) | |
616368ed DS |
1003 | rib_delete (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1004 | 0, zebra_flags, &p, NULL, 0, 0); | |
ca16218d | 1005 | |
616368ed | 1006 | union g_addr ggate = { .ipv4 = gate.sin.sin_addr }; |
ca16218d | 1007 | if (rtm->rtm_type == RTM_GET |
1008 | || rtm->rtm_type == RTM_ADD | |
1009 | || rtm->rtm_type == RTM_CHANGE) | |
3b1098be DS |
1010 | rib_add (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0, zebra_flags, |
1011 | &p, &ggate, NULL, 0, 0, 0, 0, 0); | |
718e3744 | 1012 | else |
616368ed | 1013 | rib_delete (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
3b1098be | 1014 | 0, zebra_flags, &p, &ggate, 0, 0); |
718e3744 | 1015 | } |
718e3744 | 1016 | if (dest.sa.sa_family == AF_INET6) |
1017 | { | |
5619f56b DO |
1018 | /* One day we might have a debug section here like one in the |
1019 | * IPv4 case above. Just ignore own messages at the moment. | |
1020 | */ | |
1021 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) | |
1022 | return; | |
616368ed | 1023 | struct prefix p; |
b892f1dd | 1024 | ifindex_t ifindex = 0; |
718e3744 | 1025 | |
1026 | p.family = AF_INET6; | |
616368ed | 1027 | p.u.prefix6 = dest.sin6.sin6_addr; |
718e3744 | 1028 | if (flags & RTF_HOST) |
1029 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1030 | else | |
1031 | p.prefixlen = ip6_masklen (mask.sin6.sin6_addr); | |
1032 | ||
1033 | #ifdef KAME | |
1034 | if (IN6_IS_ADDR_LINKLOCAL (&gate.sin6.sin6_addr)) | |
1035 | { | |
1036 | ifindex = IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr); | |
1037 | SET_IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr, 0); | |
1038 | } | |
1039 | #endif /* KAME */ | |
1040 | ||
ca16218d | 1041 | /* CHANGE: delete the old prefix, we have no further information |
1042 | * to specify the route really | |
1043 | */ | |
1044 | if (rtm->rtm_type == RTM_CHANGE) | |
616368ed DS |
1045 | rib_delete (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1046 | 0, zebra_flags, &p, NULL, 0, 0); | |
1047 | ||
1048 | union g_addr ggate = { .ipv6 = gate.sin6.sin6_addr }; | |
ca16218d | 1049 | if (rtm->rtm_type == RTM_GET |
1050 | || rtm->rtm_type == RTM_ADD | |
1051 | || rtm->rtm_type == RTM_CHANGE) | |
3b1098be DS |
1052 | rib_add (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1053 | 0, zebra_flags, &p, &ggate, NULL, ifindex, | |
1054 | 0, 0, 0, 0); | |
718e3744 | 1055 | else |
616368ed DS |
1056 | rib_delete (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1057 | 0, zebra_flags, &p, &ggate, ifindex, 0); | |
718e3744 | 1058 | } |
718e3744 | 1059 | } |
1060 | ||
1061 | /* Interface function for the kernel routing table updates. Support | |
6621ca86 | 1062 | * for RTM_CHANGE will be needed. |
1063 | * Exported only for rt_socket.c | |
1064 | */ | |
718e3744 | 1065 | int |
1066 | rtm_write (int message, | |
1067 | union sockunion *dest, | |
1068 | union sockunion *mask, | |
1069 | union sockunion *gate, | |
1070 | unsigned int index, | |
1071 | int zebra_flags, | |
1072 | int metric) | |
1073 | { | |
1074 | int ret; | |
1075 | caddr_t pnt; | |
1076 | struct interface *ifp; | |
718e3744 | 1077 | |
1078 | /* Sequencial number of routing message. */ | |
1079 | static int msg_seq = 0; | |
1080 | ||
1081 | /* Struct of rt_msghdr and buffer for storing socket's data. */ | |
1082 | struct | |
1083 | { | |
1084 | struct rt_msghdr rtm; | |
1085 | char buf[512]; | |
1086 | } msg; | |
1087 | ||
718e3744 | 1088 | if (routing_sock < 0) |
1089 | return ZEBRA_ERR_EPERM; | |
1090 | ||
1091 | /* Clear and set rt_msghdr values */ | |
1092 | memset (&msg, 0, sizeof (struct rt_msghdr)); | |
1093 | msg.rtm.rtm_version = RTM_VERSION; | |
1094 | msg.rtm.rtm_type = message; | |
1095 | msg.rtm.rtm_seq = msg_seq++; | |
1096 | msg.rtm.rtm_addrs = RTA_DST; | |
1097 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
1098 | msg.rtm.rtm_flags = RTF_UP; | |
1099 | msg.rtm.rtm_index = index; | |
1100 | ||
1101 | if (metric != 0) | |
1102 | { | |
1103 | msg.rtm.rtm_rmx.rmx_hopcount = metric; | |
1104 | msg.rtm.rtm_inits |= RTV_HOPCOUNT; | |
1105 | } | |
1106 | ||
1107 | ifp = if_lookup_by_index (index); | |
1108 | ||
1109 | if (gate && message == RTM_ADD) | |
1110 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
1111 | ||
e6f148e6 DW |
1112 | /* When RTF_CLONING is unavailable on BSD, should we set some |
1113 | * other flag instead? | |
1114 | */ | |
1115 | #ifdef RTF_CLONING | |
718e3744 | 1116 | if (! gate && message == RTM_ADD && ifp && |
1117 | (ifp->flags & IFF_POINTOPOINT) == 0) | |
1118 | msg.rtm.rtm_flags |= RTF_CLONING; | |
e6f148e6 | 1119 | #endif /* RTF_CLONING */ |
718e3744 | 1120 | |
1121 | /* If no protocol specific gateway is specified, use link | |
1122 | address for gateway. */ | |
1123 | if (! gate) | |
1124 | { | |
1125 | if (!ifp) | |
1126 | { | |
dc95824a DO |
1127 | char dest_buf[INET_ADDRSTRLEN] = "NULL", mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; |
1128 | if (dest) | |
1129 | inet_ntop (AF_INET, &dest->sin.sin_addr, dest_buf, INET_ADDRSTRLEN); | |
1130 | if (mask) | |
1131 | inet_ntop (AF_INET, &mask->sin.sin_addr, mask_buf, INET_ADDRSTRLEN); | |
1132 | zlog_warn ("%s: %s/%s: gate == NULL and no gateway found for ifindex %d", | |
1133 | __func__, dest_buf, mask_buf, index); | |
718e3744 | 1134 | return -1; |
1135 | } | |
8ccc7e80 | 1136 | gate = (union sockunion *) &((struct zebra_if *)ifp->info)->sdl; |
718e3744 | 1137 | } |
1138 | ||
1139 | if (mask) | |
1140 | msg.rtm.rtm_addrs |= RTA_NETMASK; | |
1141 | else if (message == RTM_ADD) | |
1142 | msg.rtm.rtm_flags |= RTF_HOST; | |
1143 | ||
1144 | /* Tagging route with flags */ | |
1145 | msg.rtm.rtm_flags |= (RTF_PROTO1); | |
1146 | ||
1147 | /* Additional flags. */ | |
1148 | if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) | |
1149 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
81dfcaa2 | 1150 | if (zebra_flags & ZEBRA_FLAG_REJECT) |
1151 | msg.rtm.rtm_flags |= RTF_REJECT; | |
1152 | ||
718e3744 | 1153 | |
718e3744 | 1154 | #define SOCKADDRSET(X,R) \ |
1155 | if (msg.rtm.rtm_addrs & (R)) \ | |
1156 | { \ | |
6fe70d1b | 1157 | int len = SAROUNDUP (X); \ |
718e3744 | 1158 | memcpy (pnt, (caddr_t)(X), len); \ |
1159 | pnt += len; \ | |
1160 | } | |
718e3744 | 1161 | |
1162 | pnt = (caddr_t) msg.buf; | |
1163 | ||
1164 | /* Write each socket data into rtm message buffer */ | |
1165 | SOCKADDRSET (dest, RTA_DST); | |
1166 | SOCKADDRSET (gate, RTA_GATEWAY); | |
1167 | SOCKADDRSET (mask, RTA_NETMASK); | |
1168 | ||
1169 | msg.rtm.rtm_msglen = pnt - (caddr_t) &msg; | |
1170 | ||
1171 | ret = write (routing_sock, &msg, msg.rtm.rtm_msglen); | |
1172 | ||
1173 | if (ret != msg.rtm.rtm_msglen) | |
1174 | { | |
1175 | if (errno == EEXIST) | |
1176 | return ZEBRA_ERR_RTEXIST; | |
1177 | if (errno == ENETUNREACH) | |
1178 | return ZEBRA_ERR_RTUNREACH; | |
dc95824a DO |
1179 | if (errno == ESRCH) |
1180 | return ZEBRA_ERR_RTNOEXIST; | |
718e3744 | 1181 | |
dc95824a DO |
1182 | zlog_warn ("%s: write : %s (%d)", __func__, safe_strerror (errno), errno); |
1183 | return ZEBRA_ERR_KERNEL; | |
718e3744 | 1184 | } |
dc95824a | 1185 | return ZEBRA_ERR_NOERROR; |
718e3744 | 1186 | } |
1187 | ||
6b0655a2 | 1188 | |
718e3744 | 1189 | #include "thread.h" |
1190 | #include "zebra/zserv.h" | |
1191 | ||
718e3744 | 1192 | /* For debug purpose. */ |
b6178002 | 1193 | static void |
718e3744 | 1194 | rtmsg_debug (struct rt_msghdr *rtm) |
1195 | { | |
2d844524 | 1196 | zlog_debug ("Kernel: Len: %d Type: %s", rtm->rtm_msglen, lookup (rtm_type_str, rtm->rtm_type)); |
718e3744 | 1197 | rtm_flag_dump (rtm->rtm_flags); |
b6178002 | 1198 | zlog_debug ("Kernel: message seq %d", rtm->rtm_seq); |
fb4ca3e7 DL |
1199 | zlog_debug ("Kernel: pid %lld, rtm_addrs 0x%x", |
1200 | (long long)rtm->rtm_pid, rtm->rtm_addrs); | |
718e3744 | 1201 | } |
1202 | ||
1203 | /* This is pretty gross, better suggestions welcome -- mhandler */ | |
1204 | #ifndef RTAX_MAX | |
1205 | #ifdef RTA_NUMBITS | |
1206 | #define RTAX_MAX RTA_NUMBITS | |
1207 | #else | |
1208 | #define RTAX_MAX 8 | |
1209 | #endif /* RTA_NUMBITS */ | |
1210 | #endif /* RTAX_MAX */ | |
1211 | ||
1212 | /* Kernel routing table and interface updates via routing socket. */ | |
6621ca86 | 1213 | static int |
718e3744 | 1214 | kernel_read (struct thread *thread) |
1215 | { | |
1216 | int sock; | |
1217 | int nbytes; | |
1218 | struct rt_msghdr *rtm; | |
1219 | ||
dbee01fe | 1220 | /* |
1221 | * This must be big enough for any message the kernel might send. | |
b27900b7 | 1222 | * Rather than determining how many sockaddrs of what size might be |
1223 | * in each particular message, just use RTAX_MAX of sockaddr_storage | |
1224 | * for each. Note that the sockaddrs must be after each message | |
1225 | * definition, or rather after whichever happens to be the largest, | |
1226 | * since the buffer needs to be big enough for a message and the | |
1227 | * sockaddrs together. | |
dbee01fe | 1228 | */ |
718e3744 | 1229 | union |
1230 | { | |
1231 | /* Routing information. */ | |
1232 | struct | |
1233 | { | |
1234 | struct rt_msghdr rtm; | |
b27900b7 | 1235 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1236 | } r; |
1237 | ||
1238 | /* Interface information. */ | |
1239 | struct | |
1240 | { | |
1241 | struct if_msghdr ifm; | |
b27900b7 | 1242 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1243 | } im; |
1244 | ||
1245 | /* Interface address information. */ | |
1246 | struct | |
1247 | { | |
1248 | struct ifa_msghdr ifa; | |
b27900b7 | 1249 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1250 | } ia; |
1251 | ||
1252 | #ifdef RTM_IFANNOUNCE | |
1253 | /* Interface arrival/departure */ | |
1254 | struct | |
1255 | { | |
1256 | struct if_announcemsghdr ifan; | |
b27900b7 | 1257 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1258 | } ian; |
1259 | #endif /* RTM_IFANNOUNCE */ | |
1260 | ||
1261 | } buf; | |
1262 | ||
1263 | /* Fetch routing socket. */ | |
1264 | sock = THREAD_FD (thread); | |
1265 | ||
1266 | nbytes= read (sock, &buf, sizeof buf); | |
1267 | ||
1268 | if (nbytes <= 0) | |
1269 | { | |
1270 | if (nbytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN) | |
6099b3b5 | 1271 | zlog_warn ("routing socket error: %s", safe_strerror (errno)); |
718e3744 | 1272 | return 0; |
1273 | } | |
1274 | ||
9bcdb638 | 1275 | thread_add_read (zebrad.master, kernel_read, NULL, sock); |
718e3744 | 1276 | |
726f9b2b | 1277 | if (IS_ZEBRA_DEBUG_KERNEL) |
1278 | rtmsg_debug (&buf.r.rtm); | |
718e3744 | 1279 | |
1280 | rtm = &buf.r.rtm; | |
1281 | ||
b27900b7 | 1282 | /* |
1283 | * Ensure that we didn't drop any data, so that processing routines | |
1284 | * can assume they have the whole message. | |
1285 | */ | |
da26e3b6 | 1286 | if (rtm->rtm_msglen != nbytes) |
1287 | { | |
1288 | zlog_warn ("kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n", | |
1289 | rtm->rtm_msglen, nbytes, rtm->rtm_type); | |
1290 | return -1; | |
1291 | } | |
1292 | ||
718e3744 | 1293 | switch (rtm->rtm_type) |
1294 | { | |
1295 | case RTM_ADD: | |
1296 | case RTM_DELETE: | |
ca16218d | 1297 | case RTM_CHANGE: |
718e3744 | 1298 | rtm_read (rtm); |
1299 | break; | |
1300 | case RTM_IFINFO: | |
1301 | ifm_read (&buf.im.ifm); | |
1302 | break; | |
1303 | case RTM_NEWADDR: | |
1304 | case RTM_DELADDR: | |
1305 | ifam_read (&buf.ia.ifa); | |
1306 | break; | |
1307 | #ifdef RTM_IFANNOUNCE | |
1308 | case RTM_IFANNOUNCE: | |
1309 | ifan_read (&buf.ian.ifan); | |
1310 | break; | |
1311 | #endif /* RTM_IFANNOUNCE */ | |
1312 | default: | |
726f9b2b | 1313 | if (IS_ZEBRA_DEBUG_KERNEL) |
b6178002 | 1314 | zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); |
718e3744 | 1315 | break; |
1316 | } | |
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | /* Make routing socket. */ | |
6621ca86 | 1321 | static void |
12f6fb97 | 1322 | routing_socket (struct zebra_ns *zns) |
718e3744 | 1323 | { |
edd7c245 | 1324 | if ( zserv_privs.change (ZPRIVS_RAISE) ) |
1325 | zlog_err ("routing_socket: Can't raise privileges"); | |
1326 | ||
718e3744 | 1327 | routing_sock = socket (AF_ROUTE, SOCK_RAW, 0); |
1328 | ||
1329 | if (routing_sock < 0) | |
1330 | { | |
edd7c245 | 1331 | if ( zserv_privs.change (ZPRIVS_LOWER) ) |
1332 | zlog_err ("routing_socket: Can't lower privileges"); | |
718e3744 | 1333 | zlog_warn ("Can't init kernel routing socket"); |
1334 | return; | |
1335 | } | |
1336 | ||
865b852c | 1337 | /* XXX: Socket should be NONBLOCK, however as we currently |
1338 | * discard failed writes, this will lead to inconsistencies. | |
1339 | * For now, socket must be blocking. | |
1340 | */ | |
1341 | /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) | |
1342 | zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ | |
1343 | ||
edd7c245 | 1344 | if ( zserv_privs.change (ZPRIVS_LOWER) ) |
1345 | zlog_err ("routing_socket: Can't lower privileges"); | |
718e3744 | 1346 | |
1347 | /* kernel_read needs rewrite. */ | |
9bcdb638 | 1348 | thread_add_read (zebrad.master, kernel_read, NULL, routing_sock); |
718e3744 | 1349 | } |
1350 | ||
1351 | /* Exported interface function. This function simply calls | |
1352 | routing_socket (). */ | |
1353 | void | |
12f6fb97 | 1354 | kernel_init (struct zebra_ns *zns) |
8f7d9fc0 | 1355 | { |
12f6fb97 | 1356 | routing_socket (zns); |
8f7d9fc0 FL |
1357 | } |
1358 | ||
1359 | void | |
12f6fb97 | 1360 | kernel_terminate (struct zebra_ns *zns) |
718e3744 | 1361 | { |
8f7d9fc0 | 1362 | return; |
718e3744 | 1363 | } |