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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" | |
4a1ab8e4 | 30 | #include "zebra_memory.h" |
718e3744 | 31 | #include "ioctl.h" |
32 | #include "log.h" | |
33 | #include "str.h" | |
34 | #include "table.h" | |
35 | #include "rib.h" | |
edd7c245 | 36 | #include "privs.h" |
78104b9b | 37 | #include "vrf.h" |
718e3744 | 38 | |
39 | #include "zebra/interface.h" | |
40 | #include "zebra/zserv.h" | |
41 | #include "zebra/debug.h" | |
ec1a4283 | 42 | #include "zebra/kernel_socket.h" |
8f7d9fc0 | 43 | #include "zebra/rib.h" |
718e3744 | 44 | |
edd7c245 | 45 | extern struct zebra_privs_t zserv_privs; |
46 | ||
4bfbea8c | 47 | /* |
cfa0ed09 GT |
48 | * Historically, the BSD routing socket has aligned data following a |
49 | * struct sockaddr to sizeof(long), which was 4 bytes on some | |
50 | * platforms, and 8 bytes on others. NetBSD 6 changed the routing | |
51 | * socket to align to sizeof(uint64_t), which is 8 bytes. OS X | |
52 | * appears to align to sizeof(int), which is 4 bytes. | |
4bfbea8c | 53 | * |
cfa0ed09 GT |
54 | * Alignment of zero-sized sockaddrs is nonsensical, but historically |
55 | * BSD defines RT_ROUNDUP(0) to be the alignment interval (rather than | |
56 | * 0). We follow this practice without questioning it, but it is a | |
57 | * bug if quagga calls ROUNDUP with 0. | |
4bfbea8c | 58 | */ |
cfa0ed09 GT |
59 | |
60 | /* | |
61 | * Because of these varying conventions, the only sane approach is for | |
62 | * the <net/route.h> header to define some flavor of ROUNDUP macro. | |
63 | */ | |
e7f0e649 DL |
64 | |
65 | #if defined(SA_SIZE) | |
66 | /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */ | |
67 | #define SAROUNDUP(a) SA_SIZE(a) | |
68 | #else /* !SA_SIZE */ | |
69 | ||
cfa0ed09 GT |
70 | #if defined(RT_ROUNDUP) |
71 | #define ROUNDUP(a) RT_ROUNDUP(a) | |
72 | #endif /* defined(RT_ROUNDUP) */ | |
73 | ||
f7f9a982 DL |
74 | #if defined(SUNOS_5) |
75 | /* Solaris has struct sockaddr_in[6] definitions at 16 / 32 bytes size, | |
76 | * so the whole concept doesn't really apply. */ | |
77 | #define ROUNDUP(a) (a) | |
78 | #endif | |
79 | ||
cfa0ed09 GT |
80 | /* |
81 | * If ROUNDUP has not yet been defined in terms of platform-provided | |
82 | * defines, attempt to cope with heuristics. | |
83 | */ | |
84 | #if !defined(ROUNDUP) | |
85 | ||
86 | /* | |
87 | * It's a bug for a platform not to define rounding/alignment for | |
88 | * sockaddrs on the routing socket. This warning really is | |
89 | * intentional, to provoke filing bug reports with operating systems | |
90 | * that don't define RT_ROUNDUP or equivalent. | |
91 | */ | |
92 | #warning "net/route.h does not define RT_ROUNDUP; making unwarranted assumptions!" | |
93 | ||
94 | /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */ | |
3b33de67 | 95 | #ifdef __APPLE__ |
cfa0ed09 | 96 | #define ROUNDUP_TYPE int |
67320b26 GT |
97 | #else |
98 | #define ROUNDUP_TYPE long | |
3b33de67 | 99 | #endif |
718e3744 | 100 | |
cfa0ed09 GT |
101 | #define ROUNDUP(a) \ |
102 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(ROUNDUP_TYPE) - 1))) : sizeof(ROUNDUP_TYPE)) | |
103 | ||
104 | #endif /* defined(ROUNDUP) */ | |
105 | ||
4bfbea8c | 106 | /* |
107 | * Given a pointer (sockaddr or void *), return the number of bytes | |
108 | * taken up by the sockaddr and any padding needed for alignment. | |
109 | */ | |
6f0e3f6e | 110 | #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN) |
4bfbea8c | 111 | #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len) |
30be8028 | 112 | #elif defined(HAVE_IPV6) |
4bfbea8c | 113 | /* |
114 | * One would hope all fixed-size structure definitions are aligned, | |
115 | * but round them up nonetheless. | |
116 | */ | |
117 | #define SAROUNDUP(X) \ | |
3e95a074 | 118 | (((struct sockaddr *)(X))->sa_family == AF_INET ? \ |
119 | ROUNDUP(sizeof(struct sockaddr_in)):\ | |
120 | (((struct sockaddr *)(X))->sa_family == AF_INET6 ? \ | |
121 | ROUNDUP(sizeof(struct sockaddr_in6)) : \ | |
122 | (((struct sockaddr *)(X))->sa_family == AF_LINK ? \ | |
c50ae8ba | 123 | ROUNDUP(sizeof(struct sockaddr_dl)) : sizeof(struct sockaddr)))) |
30be8028 | 124 | #else /* HAVE_IPV6 */ |
4bfbea8c | 125 | #define SAROUNDUP(X) \ |
30be8028 | 126 | (((struct sockaddr *)(X))->sa_family == AF_INET ? \ |
127 | ROUNDUP(sizeof(struct sockaddr_in)):\ | |
128 | (((struct sockaddr *)(X))->sa_family == AF_LINK ? \ | |
129 | ROUNDUP(sizeof(struct sockaddr_dl)) : sizeof(struct sockaddr))) | |
6f0e3f6e | 130 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ |
718e3744 | 131 | |
e7f0e649 DL |
132 | #endif /* !SA_SIZE */ |
133 | ||
a05df8fd DV |
134 | /* |
135 | * We use a call to an inline function to copy (PNT) to (DEST) | |
136 | * 1. Calculating the length of the copy requires an #ifdef to determine | |
137 | * if sa_len is a field and can't be used directly inside a #define | |
138 | * 2. So the compiler doesn't complain when DEST is NULL, which is only true | |
139 | * when we are skipping the copy and incrementing to the next SA | |
ec1a4283 | 140 | */ |
07e54734 | 141 | static inline void |
a05df8fd DV |
142 | rta_copy (union sockunion *dest, caddr_t src) { |
143 | int len; | |
fb4ca3e7 DL |
144 | if (!dest) |
145 | return; | |
a05df8fd DV |
146 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
147 | len = (((struct sockaddr *)src)->sa_len > sizeof (*dest)) ? | |
148 | sizeof (*dest) : ((struct sockaddr *)src)->sa_len ; | |
149 | #else | |
150 | len = (SAROUNDUP (src) > sizeof (*dest)) ? | |
151 | sizeof (*dest) : SAROUNDUP (src) ; | |
152 | #endif | |
153 | memcpy (dest, src, len); | |
154 | } | |
155 | ||
62debbbe | 156 | #define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \ |
157 | if ((RTMADDRS) & (RTA)) \ | |
158 | { \ | |
159 | int len = SAROUNDUP ((PNT)); \ | |
fb4ca3e7 | 160 | if (af_check (((struct sockaddr *)(PNT))->sa_family)) \ |
a05df8fd | 161 | rta_copy((DEST), (PNT)); \ |
62debbbe | 162 | (PNT) += len; \ |
163 | } | |
164 | #define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \ | |
165 | if ((RTMADDRS) & (RTA)) \ | |
166 | { \ | |
167 | int len = SAROUNDUP ((PNT)); \ | |
fb4ca3e7 | 168 | rta_copy((DEST), (PNT)); \ |
62debbbe | 169 | (PNT) += len; \ |
170 | } | |
171 | ||
6fe70d1b | 172 | #define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \ |
173 | if ((RTMADDRS) & (RTA)) \ | |
174 | { \ | |
ec1a4283 | 175 | u_char *pdest = (u_char *) (DEST); \ |
6fe70d1b | 176 | int len = SAROUNDUP ((PNT)); \ |
177 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)(PNT); \ | |
178 | if (IS_ZEBRA_DEBUG_KERNEL) \ | |
179 | zlog_debug ("%s: RTA_SDL_GET nlen %d, alen %d", \ | |
180 | __func__, sdl->sdl_nlen, sdl->sdl_alen); \ | |
181 | if ( ((DEST) != NULL) && (sdl->sdl_family == AF_LINK) \ | |
182 | && (sdl->sdl_nlen < IFNAMSIZ) && (sdl->sdl_nlen <= len) ) \ | |
183 | { \ | |
ec1a4283 | 184 | memcpy (pdest, sdl->sdl_data, sdl->sdl_nlen); \ |
185 | pdest[sdl->sdl_nlen] = '\0'; \ | |
6fe70d1b | 186 | (LEN) = sdl->sdl_nlen; \ |
187 | } \ | |
188 | (PNT) += len; \ | |
189 | } \ | |
190 | else \ | |
191 | { \ | |
192 | (LEN) = 0; \ | |
193 | } | |
718e3744 | 194 | /* Routing socket message types. */ |
1423c809 | 195 | const struct message rtm_type_str[] = |
718e3744 | 196 | { |
197 | {RTM_ADD, "RTM_ADD"}, | |
198 | {RTM_DELETE, "RTM_DELETE"}, | |
199 | {RTM_CHANGE, "RTM_CHANGE"}, | |
200 | {RTM_GET, "RTM_GET"}, | |
201 | {RTM_LOSING, "RTM_LOSING"}, | |
202 | {RTM_REDIRECT, "RTM_REDIRECT"}, | |
203 | {RTM_MISS, "RTM_MISS"}, | |
204 | {RTM_LOCK, "RTM_LOCK"}, | |
9458b819 | 205 | #ifdef OLDADD |
718e3744 | 206 | {RTM_OLDADD, "RTM_OLDADD"}, |
9458b819 GT |
207 | #endif /* RTM_OLDADD */ |
208 | #ifdef RTM_OLDDEL | |
718e3744 | 209 | {RTM_OLDDEL, "RTM_OLDDEL"}, |
9458b819 | 210 | #endif /* RTM_OLDDEL */ |
718e3744 | 211 | {RTM_RESOLVE, "RTM_RESOLVE"}, |
212 | {RTM_NEWADDR, "RTM_NEWADDR"}, | |
213 | {RTM_DELADDR, "RTM_DELADDR"}, | |
214 | {RTM_IFINFO, "RTM_IFINFO"}, | |
215 | #ifdef RTM_OIFINFO | |
216 | {RTM_OIFINFO, "RTM_OIFINFO"}, | |
217 | #endif /* RTM_OIFINFO */ | |
218 | #ifdef RTM_NEWMADDR | |
219 | {RTM_NEWMADDR, "RTM_NEWMADDR"}, | |
220 | #endif /* RTM_NEWMADDR */ | |
221 | #ifdef RTM_DELMADDR | |
222 | {RTM_DELMADDR, "RTM_DELMADDR"}, | |
223 | #endif /* RTM_DELMADDR */ | |
224 | #ifdef RTM_IFANNOUNCE | |
225 | {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, | |
226 | #endif /* RTM_IFANNOUNCE */ | |
227 | {0, NULL} | |
228 | }; | |
229 | ||
ce0db9cb | 230 | static const struct message rtm_flag_str[] = |
718e3744 | 231 | { |
232 | {RTF_UP, "UP"}, | |
233 | {RTF_GATEWAY, "GATEWAY"}, | |
234 | {RTF_HOST, "HOST"}, | |
235 | {RTF_REJECT, "REJECT"}, | |
236 | {RTF_DYNAMIC, "DYNAMIC"}, | |
237 | {RTF_MODIFIED, "MODIFIED"}, | |
238 | {RTF_DONE, "DONE"}, | |
239 | #ifdef RTF_MASK | |
240 | {RTF_MASK, "MASK"}, | |
241 | #endif /* RTF_MASK */ | |
e6f148e6 | 242 | #ifdef RTF_CLONING |
718e3744 | 243 | {RTF_CLONING, "CLONING"}, |
e6f148e6 | 244 | #endif /* RTF_CLONING */ |
23b1f400 | 245 | #ifdef RTF_XRESOLVE |
718e3744 | 246 | {RTF_XRESOLVE, "XRESOLVE"}, |
23b1f400 | 247 | #endif /* RTF_XRESOLVE */ |
c54632ec | 248 | #ifdef RTF_LLINFO |
718e3744 | 249 | {RTF_LLINFO, "LLINFO"}, |
c54632ec | 250 | #endif /* RTF_LLINFO */ |
718e3744 | 251 | {RTF_STATIC, "STATIC"}, |
252 | {RTF_BLACKHOLE, "BLACKHOLE"}, | |
6fe70d1b | 253 | #ifdef RTF_PRIVATE |
254 | {RTF_PRIVATE, "PRIVATE"}, | |
255 | #endif /* RTF_PRIVATE */ | |
718e3744 | 256 | {RTF_PROTO1, "PROTO1"}, |
257 | {RTF_PROTO2, "PROTO2"}, | |
258 | #ifdef RTF_PRCLONING | |
259 | {RTF_PRCLONING, "PRCLONING"}, | |
260 | #endif /* RTF_PRCLONING */ | |
261 | #ifdef RTF_WASCLONED | |
262 | {RTF_WASCLONED, "WASCLONED"}, | |
263 | #endif /* RTF_WASCLONED */ | |
264 | #ifdef RTF_PROTO3 | |
265 | {RTF_PROTO3, "PROTO3"}, | |
266 | #endif /* RTF_PROTO3 */ | |
267 | #ifdef RTF_PINNED | |
268 | {RTF_PINNED, "PINNED"}, | |
269 | #endif /* RTF_PINNED */ | |
270 | #ifdef RTF_LOCAL | |
271 | {RTF_LOCAL, "LOCAL"}, | |
272 | #endif /* RTF_LOCAL */ | |
273 | #ifdef RTF_BROADCAST | |
274 | {RTF_BROADCAST, "BROADCAST"}, | |
275 | #endif /* RTF_BROADCAST */ | |
276 | #ifdef RTF_MULTICAST | |
277 | {RTF_MULTICAST, "MULTICAST"}, | |
278 | #endif /* RTF_MULTICAST */ | |
6fe70d1b | 279 | #ifdef RTF_MULTIRT |
280 | {RTF_MULTIRT, "MULTIRT"}, | |
281 | #endif /* RTF_MULTIRT */ | |
282 | #ifdef RTF_SETSRC | |
283 | {RTF_SETSRC, "SETSRC"}, | |
284 | #endif /* RTF_SETSRC */ | |
718e3744 | 285 | {0, NULL} |
286 | }; | |
287 | ||
288 | /* Kernel routing update socket. */ | |
289 | int routing_sock = -1; | |
290 | ||
291 | /* Yes I'm checking ugly routing socket behavior. */ | |
292 | /* #define DEBUG */ | |
293 | ||
294 | /* Supported address family check. */ | |
07e54734 | 295 | static inline int |
718e3744 | 296 | af_check (int family) |
297 | { | |
298 | if (family == AF_INET) | |
299 | return 1; | |
300 | #ifdef HAVE_IPV6 | |
301 | if (family == AF_INET6) | |
302 | return 1; | |
303 | #endif /* HAVE_IPV6 */ | |
304 | return 0; | |
305 | } | |
6b0655a2 | 306 | |
718e3744 | 307 | /* Dump routing table flag for debug purpose. */ |
b6178002 | 308 | static void |
718e3744 | 309 | rtm_flag_dump (int flag) |
310 | { | |
80b2a941 | 311 | const struct message *mes; |
718e3744 | 312 | static char buf[BUFSIZ]; |
313 | ||
cced60dd | 314 | buf[0] = '\0'; |
718e3744 | 315 | for (mes = rtm_flag_str; mes->key != 0; mes++) |
316 | { | |
317 | if (mes->key & flag) | |
318 | { | |
319 | strlcat (buf, mes->str, BUFSIZ); | |
320 | strlcat (buf, " ", BUFSIZ); | |
321 | } | |
322 | } | |
b6178002 | 323 | zlog_debug ("Kernel: %s", buf); |
718e3744 | 324 | } |
325 | ||
326 | #ifdef RTM_IFANNOUNCE | |
327 | /* Interface adding function */ | |
6621ca86 | 328 | static int |
718e3744 | 329 | ifan_read (struct if_announcemsghdr *ifan) |
330 | { | |
331 | struct interface *ifp; | |
6fe70d1b | 332 | |
718e3744 | 333 | ifp = if_lookup_by_index (ifan->ifan_index); |
6fe70d1b | 334 | |
335 | if (ifp) | |
336 | assert ( (ifp->ifindex == ifan->ifan_index) | |
337 | || (ifp->ifindex == IFINDEX_INTERNAL) ); | |
338 | ||
ec1a4283 | 339 | if ( (ifp == NULL) |
340 | || ((ifp->ifindex == IFINDEX_INTERNAL) | |
341 | && (ifan->ifan_what == IFAN_ARRIVAL)) ) | |
718e3744 | 342 | { |
6fe70d1b | 343 | if (IS_ZEBRA_DEBUG_KERNEL) |
344 | zlog_debug ("%s: creating interface for ifindex %d, name %s", | |
345 | __func__, ifan->ifan_index, ifan->ifan_name); | |
346 | ||
718e3744 | 347 | /* Create Interface */ |
08dbfb69 | 348 | ifp = if_get_by_name_len(ifan->ifan_name, |
349 | strnlen(ifan->ifan_name, | |
350 | sizeof(ifan->ifan_name))); | |
718e3744 | 351 | ifp->ifindex = ifan->ifan_index; |
352 | ||
1db65fad | 353 | if_get_metric (ifp); |
718e3744 | 354 | if_add_update (ifp); |
355 | } | |
356 | else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) | |
6eb8827d | 357 | if_delete_update (ifp); |
718e3744 | 358 | |
359 | if_get_flags (ifp); | |
360 | if_get_mtu (ifp); | |
361 | if_get_metric (ifp); | |
362 | ||
363 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe70d1b | 364 | zlog_debug ("%s: interface %s index %d", |
365 | __func__, ifan->ifan_name, ifan->ifan_index); | |
718e3744 | 366 | |
367 | return 0; | |
368 | } | |
369 | #endif /* RTM_IFANNOUNCE */ | |
370 | ||
9234b382 | 371 | #ifdef HAVE_BSD_IFI_LINK_STATE |
c543a173 AS |
372 | /* BSD link detect translation */ |
373 | static void | |
374 | bsd_linkdetect_translate (struct if_msghdr *ifm) | |
375 | { | |
55edb0d4 AS |
376 | if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) || |
377 | (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) | |
c543a173 AS |
378 | SET_FLAG(ifm->ifm_flags, IFF_RUNNING); |
379 | else | |
380 | UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
381 | } | |
9234b382 | 382 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 383 | |
8ccc7e80 TT |
384 | static enum zebra_link_type |
385 | sdl_to_zebra_link_type (unsigned int sdlt) | |
386 | { | |
387 | switch (sdlt) | |
388 | { | |
389 | case IFT_ETHER: return ZEBRA_LLT_ETHER; | |
390 | case IFT_X25: return ZEBRA_LLT_X25; | |
391 | case IFT_FDDI: return ZEBRA_LLT_FDDI; | |
392 | case IFT_PPP: return ZEBRA_LLT_PPP; | |
393 | case IFT_LOOP: return ZEBRA_LLT_LOOPBACK; | |
394 | case IFT_SLIP: return ZEBRA_LLT_SLIP; | |
395 | case IFT_ARCNET: return ZEBRA_LLT_ARCNET; | |
396 | case IFT_ATM: return ZEBRA_LLT_ATM; | |
397 | case IFT_LOCALTALK: return ZEBRA_LLT_LOCALTLK; | |
398 | case IFT_HIPPI: return ZEBRA_LLT_HIPPI; | |
399 | #ifdef IFT_IEEE1394 | |
400 | case IFT_IEEE1394: return ZEBRA_LLT_IEEE1394; | |
401 | #endif | |
402 | ||
403 | default: return ZEBRA_LLT_UNKNOWN; | |
404 | } | |
405 | } | |
406 | ||
da26e3b6 | 407 | /* |
408 | * Handle struct if_msghdr obtained from reading routing socket or | |
409 | * sysctl (from interface_list). There may or may not be sockaddrs | |
410 | * present after the header. | |
411 | */ | |
ec1a4283 | 412 | int |
718e3744 | 413 | ifm_read (struct if_msghdr *ifm) |
414 | { | |
3e95a074 | 415 | struct interface *ifp = NULL; |
a34eb368 | 416 | struct sockaddr_dl *sdl; |
6fe70d1b | 417 | char ifname[IFNAMSIZ]; |
418 | short ifnlen = 0; | |
a05df8fd | 419 | caddr_t cp; |
6fe70d1b | 420 | |
421 | /* terminate ifname at head (for strnlen) and tail (for safety) */ | |
422 | ifname[IFNAMSIZ - 1] = '\0'; | |
423 | ||
da26e3b6 | 424 | /* paranoia: sanity check structure */ |
425 | if (ifm->ifm_msglen < sizeof(struct if_msghdr)) | |
426 | { | |
427 | zlog_err ("ifm_read: ifm->ifm_msglen %d too short\n", | |
428 | ifm->ifm_msglen); | |
429 | return -1; | |
430 | } | |
431 | ||
432 | /* | |
4bfbea8c | 433 | * Check for a sockaddr_dl following the message. First, point to |
434 | * where a socakddr might be if one follows the message. | |
da26e3b6 | 435 | */ |
4bfbea8c | 436 | cp = (void *)(ifm + 1); |
718e3744 | 437 | |
4bfbea8c | 438 | #ifdef SUNOS_5 |
3e95a074 | 439 | /* |
4bfbea8c | 440 | * XXX This behavior should be narrowed to only the kernel versions |
441 | * for which the structures returned do not match the headers. | |
442 | * | |
3e95a074 | 443 | * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions |
4bfbea8c | 444 | * is 12 bytes larger than the 32 bit version. |
3e95a074 | 445 | */ |
4bfbea8c | 446 | if (((struct sockaddr *) cp)->sa_family == AF_UNSPEC) |
3e95a074 | 447 | cp = cp + 12; |
4bfbea8c | 448 | #endif |
3e95a074 | 449 | |
6fe70d1b | 450 | RTA_ADDR_GET (NULL, RTA_DST, ifm->ifm_addrs, cp); |
451 | RTA_ADDR_GET (NULL, RTA_GATEWAY, ifm->ifm_addrs, cp); | |
452 | RTA_ATTR_GET (NULL, RTA_NETMASK, ifm->ifm_addrs, cp); | |
453 | RTA_ADDR_GET (NULL, RTA_GENMASK, ifm->ifm_addrs, cp); | |
a34eb368 | 454 | sdl = (struct sockaddr_dl *)cp; |
6fe70d1b | 455 | RTA_NAME_GET (ifname, RTA_IFP, ifm->ifm_addrs, cp, ifnlen); |
456 | RTA_ADDR_GET (NULL, RTA_IFA, ifm->ifm_addrs, cp); | |
457 | RTA_ADDR_GET (NULL, RTA_AUTHOR, ifm->ifm_addrs, cp); | |
458 | RTA_ADDR_GET (NULL, RTA_BRD, ifm->ifm_addrs, cp); | |
459 | ||
460 | if (IS_ZEBRA_DEBUG_KERNEL) | |
461 | zlog_debug ("%s: sdl ifname %s", __func__, (ifnlen ? ifname : "(nil)")); | |
462 | ||
4bfbea8c | 463 | /* |
6fe70d1b | 464 | * Look up on ifindex first, because ifindices are the primary handle for |
465 | * interfaces across the user/kernel boundary, for most systems. (Some | |
466 | * messages, such as up/down status changes on NetBSD, do not include a | |
467 | * sockaddr_dl). | |
4bfbea8c | 468 | */ |
6fe70d1b | 469 | if ( (ifp = if_lookup_by_index (ifm->ifm_index)) != NULL ) |
3e95a074 | 470 | { |
6fe70d1b | 471 | /* we have an ifp, verify that the name matches as some systems, |
472 | * eg Solaris, have a 1:many association of ifindex:ifname | |
473 | * if they dont match, we dont have the correct ifp and should | |
474 | * set it back to NULL to let next check do lookup by name | |
475 | */ | |
476 | if (ifnlen && (strncmp (ifp->name, ifname, IFNAMSIZ) != 0) ) | |
3e95a074 | 477 | { |
6fe70d1b | 478 | if (IS_ZEBRA_DEBUG_KERNEL) |
479 | zlog_debug ("%s: ifp name %s doesnt match sdl name %s", | |
480 | __func__, ifp->name, ifname); | |
481 | ifp = NULL; | |
3e95a074 | 482 | } |
483 | } | |
6fe70d1b | 484 | |
3e95a074 | 485 | /* |
6fe70d1b | 486 | * If we dont have an ifp, try looking up by name. Particularly as some |
487 | * systems (Solaris) have a 1:many mapping of ifindex:ifname - the ifname | |
488 | * is therefore our unique handle to that interface. | |
489 | * | |
490 | * Interfaces specified in the configuration file for which the ifindex | |
491 | * has not been determined will have ifindex == IFINDEX_INTERNAL, and such | |
492 | * interfaces are found by this search, and then their ifindex values can | |
493 | * be filled in. | |
3e95a074 | 494 | */ |
6fe70d1b | 495 | if ( (ifp == NULL) && ifnlen) |
496 | ifp = if_lookup_by_name (ifname); | |
718e3744 | 497 | |
da26e3b6 | 498 | /* |
6fe70d1b | 499 | * If ifp still does not exist or has an invalid index (IFINDEX_INTERNAL), |
500 | * create or fill in an interface. | |
da26e3b6 | 501 | */ |
d2fc8896 | 502 | if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) |
718e3744 | 503 | { |
da26e3b6 | 504 | /* |
4bfbea8c | 505 | * To create or fill in an interface, a sockaddr_dl (via |
506 | * RTA_IFP) is required. | |
da26e3b6 | 507 | */ |
6fe70d1b | 508 | if (!ifnlen) |
da26e3b6 | 509 | { |
6fe70d1b | 510 | zlog_warn ("Interface index %d (new) missing ifname\n", |
4bfbea8c | 511 | ifm->ifm_index); |
da26e3b6 | 512 | return -1; |
513 | } | |
5c78b3d0 | 514 | |
515 | #ifndef RTM_IFANNOUNCE | |
516 | /* Down->Down interface should be ignored here. | |
517 | * See further comment below. | |
518 | */ | |
519 | if (!CHECK_FLAG (ifm->ifm_flags, IFF_UP)) | |
520 | return 0; | |
521 | #endif /* !RTM_IFANNOUNCE */ | |
6fe70d1b | 522 | |
3e95a074 | 523 | if (ifp == NULL) |
6fe70d1b | 524 | { |
525 | /* Interface that zebra was not previously aware of, so create. */ | |
526 | ifp = if_create (ifname, ifnlen); | |
527 | if (IS_ZEBRA_DEBUG_KERNEL) | |
528 | zlog_debug ("%s: creating ifp for ifindex %d", | |
529 | __func__, ifm->ifm_index); | |
530 | } | |
718e3744 | 531 | |
6fe70d1b | 532 | if (IS_ZEBRA_DEBUG_KERNEL) |
533 | zlog_debug ("%s: updated/created ifp, ifname %s, ifindex %d", | |
534 | __func__, ifp->name, ifp->ifindex); | |
4bfbea8c | 535 | /* |
536 | * Fill in newly created interface structure, or larval | |
d2fc8896 | 537 | * structure with ifindex IFINDEX_INTERNAL. |
4bfbea8c | 538 | */ |
718e3744 | 539 | ifp->ifindex = ifm->ifm_index; |
c543a173 | 540 | |
9234b382 | 541 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
c543a173 | 542 | bsd_linkdetect_translate(ifm); |
9234b382 | 543 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 544 | |
5c78b3d0 | 545 | if_flags_update (ifp, ifm->ifm_flags); |
718e3744 | 546 | #if defined(__bsdi__) |
547 | if_kvm_get_mtu (ifp); | |
548 | #else | |
549 | if_get_mtu (ifp); | |
550 | #endif /* __bsdi__ */ | |
551 | if_get_metric (ifp); | |
552 | ||
a34eb368 TG |
553 | /* |
554 | * XXX sockaddr_dl contents can be larger than the structure | |
ca3ccd87 DL |
555 | * definition. There are 2 big families here: |
556 | * - BSD has sdl_len + sdl_data[16] + overruns sdl_data | |
557 | * we MUST use sdl_len here or we'll truncate data. | |
558 | * - Solaris has no sdl_len, but sdl_data[244] | |
559 | * presumably, it's not going to run past that, so sizeof() | |
560 | * is fine here. | |
a34eb368 TG |
561 | * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid |
562 | */ | |
8ccc7e80 TT |
563 | ifp->ll_type = ZEBRA_LLT_UNKNOWN; |
564 | ifp->hw_addr_len = 0; | |
a34eb368 | 565 | if (ifnlen) |
8ccc7e80 | 566 | { |
ca3ccd87 | 567 | #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN |
8ccc7e80 | 568 | memcpy (&((struct zebra_if *)ifp->info)->sdl, sdl, sdl->sdl_len); |
ca3ccd87 | 569 | #else |
8ccc7e80 | 570 | memcpy (&((struct zebra_if *)ifp->info)->sdl, sdl, sizeof (struct sockaddr_dl)); |
ca3ccd87 | 571 | #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */ |
8ccc7e80 TT |
572 | |
573 | ifp->ll_type = sdl_to_zebra_link_type (sdl->sdl_type); | |
574 | if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) | |
575 | { | |
576 | memcpy (ifp->hw_addr, LLADDR(sdl), sdl->sdl_alen); | |
577 | ifp->hw_addr_len = sdl->sdl_alen; | |
578 | } | |
579 | } | |
a34eb368 | 580 | |
718e3744 | 581 | if_add_update (ifp); |
582 | } | |
583 | else | |
da26e3b6 | 584 | /* |
585 | * Interface structure exists. Adjust stored flags from | |
586 | * notification. If interface has up->down or down->up | |
587 | * transition, call state change routines (to adjust routes, | |
588 | * notify routing daemons, etc.). (Other flag changes are stored | |
589 | * but apparently do not trigger action.) | |
590 | */ | |
718e3744 | 591 | { |
6fe70d1b | 592 | if (ifp->ifindex != ifm->ifm_index) |
593 | { | |
594 | zlog_warn ("%s: index mismatch, ifname %s, ifp index %d, " | |
595 | "ifm index %d", | |
596 | __func__, ifp->name, ifp->ifindex, ifm->ifm_index); | |
597 | return -1; | |
598 | } | |
599 | ||
9234b382 | 600 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
c543a173 | 601 | bsd_linkdetect_translate(ifm); |
9234b382 | 602 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 603 | |
5c78b3d0 | 604 | /* update flags and handle operative->inoperative transition, if any */ |
605 | if_flags_update (ifp, ifm->ifm_flags); | |
606 | ||
6eb8827d | 607 | #ifndef RTM_IFANNOUNCE |
5c78b3d0 | 608 | if (!if_is_up (ifp)) |
609 | { | |
610 | /* No RTM_IFANNOUNCE on this platform, so we can never | |
611 | * distinguish between ~IFF_UP and delete. We must presume | |
612 | * it has been deleted. | |
613 | * Eg, Solaris will not notify us of unplumb. | |
614 | * | |
615 | * XXX: Fixme - this should be runtime detected | |
616 | * So that a binary compiled on a system with IFANNOUNCE | |
617 | * will still behave correctly if run on a platform without | |
618 | */ | |
619 | if_delete_update (ifp); | |
620 | } | |
6eb8827d | 621 | #endif /* RTM_IFANNOUNCE */ |
1ba27564 DO |
622 | if (if_is_up (ifp)) |
623 | { | |
624 | #if defined(__bsdi__) | |
625 | if_kvm_get_mtu (ifp); | |
626 | #else | |
627 | if_get_mtu (ifp); | |
628 | #endif /* __bsdi__ */ | |
629 | if_get_metric (ifp); | |
630 | } | |
718e3744 | 631 | } |
5c78b3d0 | 632 | |
718e3744 | 633 | #ifdef HAVE_NET_RT_IFLIST |
634 | ifp->stats = ifm->ifm_data; | |
635 | #endif /* HAVE_NET_RT_IFLIST */ | |
636 | ||
637 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe70d1b | 638 | zlog_debug ("%s: interface %s index %d", |
639 | __func__, ifp->name, ifp->ifindex); | |
718e3744 | 640 | |
641 | return 0; | |
642 | } | |
6b0655a2 | 643 | |
718e3744 | 644 | /* Address read from struct ifa_msghdr. */ |
6621ca86 | 645 | static void |
718e3744 | 646 | ifam_read_mesg (struct ifa_msghdr *ifm, |
647 | union sockunion *addr, | |
648 | union sockunion *mask, | |
6fe70d1b | 649 | union sockunion *brd, |
650 | char *ifname, | |
651 | short *ifnlen) | |
718e3744 | 652 | { |
653 | caddr_t pnt, end; | |
7ab62c53 AS |
654 | union sockunion dst; |
655 | union sockunion gateway; | |
718e3744 | 656 | |
657 | pnt = (caddr_t)(ifm + 1); | |
658 | end = ((caddr_t)ifm) + ifm->ifam_msglen; | |
659 | ||
718e3744 | 660 | /* Be sure structure is cleared */ |
661 | memset (mask, 0, sizeof (union sockunion)); | |
662 | memset (addr, 0, sizeof (union sockunion)); | |
6621ca86 | 663 | memset (brd, 0, sizeof (union sockunion)); |
7ab62c53 AS |
664 | memset (&dst, 0, sizeof (union sockunion)); |
665 | memset (&gateway, 0, sizeof (union sockunion)); | |
718e3744 | 666 | |
667 | /* We fetch each socket variable into sockunion. */ | |
7ab62c53 AS |
668 | RTA_ADDR_GET (&dst, RTA_DST, ifm->ifam_addrs, pnt); |
669 | RTA_ADDR_GET (&gateway, RTA_GATEWAY, ifm->ifam_addrs, pnt); | |
62debbbe | 670 | RTA_ATTR_GET (mask, RTA_NETMASK, ifm->ifam_addrs, pnt); |
671 | RTA_ADDR_GET (NULL, RTA_GENMASK, ifm->ifam_addrs, pnt); | |
6fe70d1b | 672 | RTA_NAME_GET (ifname, RTA_IFP, ifm->ifam_addrs, pnt, *ifnlen); |
62debbbe | 673 | RTA_ADDR_GET (addr, RTA_IFA, ifm->ifam_addrs, pnt); |
674 | RTA_ADDR_GET (NULL, RTA_AUTHOR, ifm->ifam_addrs, pnt); | |
6fe70d1b | 675 | RTA_ADDR_GET (brd, RTA_BRD, ifm->ifam_addrs, pnt); |
718e3744 | 676 | |
6fe70d1b | 677 | if (IS_ZEBRA_DEBUG_KERNEL) |
55196042 | 678 | { |
35d921cc TT |
679 | int family = sockunion_family(addr); |
680 | switch (family) | |
55196042 AS |
681 | { |
682 | case AF_INET: | |
55196042 AS |
683 | #ifdef HAVE_IPV6 |
684 | case AF_INET6: | |
35d921cc | 685 | #endif |
55196042 | 686 | { |
7ab62c53 | 687 | char buf[4][INET6_ADDRSTRLEN]; |
55196042 | 688 | zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x, " |
7ab62c53 AS |
689 | "ifam_flags 0x%x, addr %s/%d broad %s dst %s " |
690 | "gateway %s", | |
35d921cc | 691 | __func__, ifm->ifam_index, |
55196042 | 692 | (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs, |
7ab62c53 | 693 | ifm->ifam_flags, |
35d921cc | 694 | inet_ntop(family,&addr->sin.sin_addr, |
55196042 | 695 | buf[0],sizeof(buf[0])), |
35d921cc TT |
696 | ip_masklen(mask->sin.sin_addr), |
697 | inet_ntop(family,&brd->sin.sin_addr, | |
7ab62c53 | 698 | buf[1],sizeof(buf[1])), |
35d921cc | 699 | inet_ntop(family,&dst.sin.sin_addr, |
7ab62c53 | 700 | buf[2],sizeof(buf[2])), |
35d921cc | 701 | inet_ntop(family,&gateway.sin.sin_addr, |
7ab62c53 | 702 | buf[3],sizeof(buf[3]))); |
55196042 AS |
703 | } |
704 | break; | |
55196042 AS |
705 | default: |
706 | zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x", | |
707 | __func__, ifm->ifam_index, | |
708 | (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs); | |
709 | break; | |
710 | } | |
711 | } | |
7ab62c53 | 712 | |
718e3744 | 713 | /* Assert read up end point matches to end point */ |
714 | if (pnt != end) | |
85a2ebf2 | 715 | zlog_warn ("ifam_read() doesn't read all socket data"); |
718e3744 | 716 | } |
717 | ||
718 | /* Interface's address information get. */ | |
ec1a4283 | 719 | int |
718e3744 | 720 | ifam_read (struct ifa_msghdr *ifam) |
721 | { | |
6fe70d1b | 722 | struct interface *ifp = NULL; |
0752ef0b | 723 | union sockunion addr, mask, brd; |
6fe70d1b | 724 | char ifname[INTERFACE_NAMSIZ]; |
725 | short ifnlen = 0; | |
726 | char isalias = 0; | |
7ab62c53 | 727 | int flags = 0; |
6fe70d1b | 728 | |
729 | ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; | |
730 | ||
731 | /* Allocate and read address information. */ | |
732 | ifam_read_mesg (ifam, &addr, &mask, &brd, ifname, &ifnlen); | |
733 | ||
734 | if ((ifp = if_lookup_by_index(ifam->ifam_index)) == NULL) | |
718e3744 | 735 | { |
6fe70d1b | 736 | zlog_warn ("%s: no interface for ifname %s, index %d", |
737 | __func__, ifname, ifam->ifam_index); | |
718e3744 | 738 | return -1; |
739 | } | |
6fe70d1b | 740 | |
741 | if (ifnlen && strncmp (ifp->name, ifname, INTERFACE_NAMSIZ)) | |
742 | isalias = 1; | |
743 | ||
7ab62c53 AS |
744 | /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD |
745 | field contains a broadcast address or a peer address, so we are forced to | |
746 | rely upon the interface type. */ | |
747 | if (if_is_pointopoint(ifp)) | |
748 | SET_FLAG(flags, ZEBRA_IFA_PEER); | |
749 | ||
6502208c PJ |
750 | #if 0 |
751 | /* it might seem cute to grab the interface metric here, however | |
752 | * we're processing an address update message, and so some systems | |
753 | * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left | |
754 | * in deliberately, as comment. | |
755 | */ | |
d34b8991 | 756 | ifp->metric = ifam->ifam_metric; |
6502208c PJ |
757 | #endif |
758 | ||
718e3744 | 759 | /* Add connected address. */ |
760 | switch (sockunion_family (&addr)) | |
761 | { | |
762 | case AF_INET: | |
763 | if (ifam->ifam_type == RTM_NEWADDR) | |
7ab62c53 | 764 | connected_add_ipv4 (ifp, flags, &addr.sin.sin_addr, |
718e3744 | 765 | ip_masklen (mask.sin.sin_addr), |
d34b8991 | 766 | &brd.sin.sin_addr, |
767 | (isalias ? ifname : NULL)); | |
718e3744 | 768 | else |
7ab62c53 | 769 | connected_delete_ipv4 (ifp, flags, &addr.sin.sin_addr, |
718e3744 | 770 | ip_masklen (mask.sin.sin_addr), |
0752ef0b | 771 | &brd.sin.sin_addr); |
718e3744 | 772 | break; |
773 | #ifdef HAVE_IPV6 | |
774 | case AF_INET6: | |
775 | /* Unset interface index from link-local address when IPv6 stack | |
776 | is KAME. */ | |
777 | if (IN6_IS_ADDR_LINKLOCAL (&addr.sin6.sin6_addr)) | |
fb4ca3e7 DL |
778 | { |
779 | SET_IN6_LINKLOCAL_IFINDEX (addr.sin6.sin6_addr, 0); | |
780 | } | |
718e3744 | 781 | |
782 | if (ifam->ifam_type == RTM_NEWADDR) | |
7ab62c53 | 783 | connected_add_ipv6 (ifp, flags, &addr.sin6.sin6_addr, |
718e3744 | 784 | ip6_masklen (mask.sin6.sin6_addr), |
d34b8991 | 785 | &brd.sin6.sin6_addr, |
786 | (isalias ? ifname : NULL)); | |
718e3744 | 787 | else |
788 | connected_delete_ipv6 (ifp, | |
789 | &addr.sin6.sin6_addr, | |
790 | ip6_masklen (mask.sin6.sin6_addr), | |
0752ef0b | 791 | &brd.sin6.sin6_addr); |
718e3744 | 792 | break; |
793 | #endif /* HAVE_IPV6 */ | |
794 | default: | |
795 | /* Unsupported family silently ignore... */ | |
796 | break; | |
797 | } | |
5c78b3d0 | 798 | |
799 | /* Check interface flag for implicit up of the interface. */ | |
800 | if_refresh (ifp); | |
801 | ||
802 | #ifdef SUNOS_5 | |
803 | /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange. | |
804 | * See comments for SUNOS_5 in interface.c::if_flags_mangle. | |
805 | * | |
806 | * Here we take care of case where the real IFF_UP was previously | |
807 | * unset (as kept in struct zebra_if.primary_state) and the mangled | |
808 | * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned | |
809 | * to unset due to the lost non-primary address having DELADDR'd. | |
810 | * | |
811 | * we must delete the interface, because in between here and next | |
812 | * event for this interface-name the administrator could unplumb | |
813 | * and replumb the interface. | |
814 | */ | |
815 | if (!if_is_up (ifp)) | |
816 | if_delete_update (ifp); | |
817 | #endif /* SUNOS_5 */ | |
818 | ||
718e3744 | 819 | return 0; |
820 | } | |
6b0655a2 | 821 | |
718e3744 | 822 | /* Interface function for reading kernel routing table information. */ |
6621ca86 | 823 | static int |
718e3744 | 824 | rtm_read_mesg (struct rt_msghdr *rtm, |
825 | union sockunion *dest, | |
826 | union sockunion *mask, | |
6fe70d1b | 827 | union sockunion *gate, |
828 | char *ifname, | |
829 | short *ifnlen) | |
718e3744 | 830 | { |
831 | caddr_t pnt, end; | |
832 | ||
833 | /* Pnt points out socket data start point. */ | |
834 | pnt = (caddr_t)(rtm + 1); | |
835 | end = ((caddr_t)rtm) + rtm->rtm_msglen; | |
836 | ||
837 | /* rt_msghdr version check. */ | |
838 | if (rtm->rtm_version != RTM_VERSION) | |
839 | zlog (NULL, LOG_WARNING, | |
840 | "Routing message version different %d should be %d." | |
841 | "This may cause problem\n", rtm->rtm_version, RTM_VERSION); | |
62debbbe | 842 | |
718e3744 | 843 | /* Be sure structure is cleared */ |
844 | memset (dest, 0, sizeof (union sockunion)); | |
845 | memset (gate, 0, sizeof (union sockunion)); | |
846 | memset (mask, 0, sizeof (union sockunion)); | |
847 | ||
848 | /* We fetch each socket variable into sockunion. */ | |
62debbbe | 849 | RTA_ADDR_GET (dest, RTA_DST, rtm->rtm_addrs, pnt); |
850 | RTA_ADDR_GET (gate, RTA_GATEWAY, rtm->rtm_addrs, pnt); | |
851 | RTA_ATTR_GET (mask, RTA_NETMASK, rtm->rtm_addrs, pnt); | |
852 | RTA_ADDR_GET (NULL, RTA_GENMASK, rtm->rtm_addrs, pnt); | |
6fe70d1b | 853 | RTA_NAME_GET (ifname, RTA_IFP, rtm->rtm_addrs, pnt, *ifnlen); |
62debbbe | 854 | RTA_ADDR_GET (NULL, RTA_IFA, rtm->rtm_addrs, pnt); |
855 | RTA_ADDR_GET (NULL, RTA_AUTHOR, rtm->rtm_addrs, pnt); | |
856 | RTA_ADDR_GET (NULL, RTA_BRD, rtm->rtm_addrs, pnt); | |
718e3744 | 857 | |
858 | /* If there is netmask information set it's family same as | |
859 | destination family*/ | |
860 | if (rtm->rtm_addrs & RTA_NETMASK) | |
861 | mask->sa.sa_family = dest->sa.sa_family; | |
862 | ||
863 | /* Assert read up to the end of pointer. */ | |
864 | if (pnt != end) | |
85a2ebf2 | 865 | zlog (NULL, LOG_WARNING, "rtm_read() doesn't read all socket data."); |
718e3744 | 866 | |
867 | return rtm->rtm_flags; | |
868 | } | |
869 | ||
ec1a4283 | 870 | void |
718e3744 | 871 | rtm_read (struct rt_msghdr *rtm) |
872 | { | |
873 | int flags; | |
874 | u_char zebra_flags; | |
875 | union sockunion dest, mask, gate; | |
6fe70d1b | 876 | char ifname[INTERFACE_NAMSIZ + 1]; |
877 | short ifnlen = 0; | |
718e3744 | 878 | |
879 | zebra_flags = 0; | |
880 | ||
718e3744 | 881 | /* Read destination and netmask and gateway from rtm message |
882 | structure. */ | |
6fe70d1b | 883 | flags = rtm_read_mesg (rtm, &dest, &mask, &gate, ifname, &ifnlen); |
6da59801 DO |
884 | if (!(flags & RTF_DONE)) |
885 | return; | |
dc95824a DO |
886 | if (IS_ZEBRA_DEBUG_KERNEL) |
887 | zlog_debug ("%s: got rtm of type %d (%s)", __func__, rtm->rtm_type, | |
2d844524 | 888 | lookup (rtm_type_str, rtm->rtm_type)); |
718e3744 | 889 | |
890 | #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ | |
891 | if (flags & RTF_CLONED) | |
892 | return; | |
893 | #endif | |
894 | #ifdef RTF_WASCLONED /*freebsd*/ | |
895 | if (flags & RTF_WASCLONED) | |
896 | return; | |
897 | #endif | |
898 | ||
899 | if ((rtm->rtm_type == RTM_ADD) && ! (flags & RTF_UP)) | |
900 | return; | |
901 | ||
902 | /* This is connected route. */ | |
903 | if (! (flags & RTF_GATEWAY)) | |
904 | return; | |
905 | ||
906 | if (flags & RTF_PROTO1) | |
907 | SET_FLAG (zebra_flags, ZEBRA_FLAG_SELFROUTE); | |
908 | ||
909 | /* This is persistent route. */ | |
910 | if (flags & RTF_STATIC) | |
911 | SET_FLAG (zebra_flags, ZEBRA_FLAG_STATIC); | |
912 | ||
81dfcaa2 | 913 | /* This is a reject or blackhole route */ |
914 | if (flags & RTF_REJECT) | |
915 | SET_FLAG (zebra_flags, ZEBRA_FLAG_REJECT); | |
916 | if (flags & RTF_BLACKHOLE) | |
917 | SET_FLAG (zebra_flags, ZEBRA_FLAG_BLACKHOLE); | |
918 | ||
718e3744 | 919 | if (dest.sa.sa_family == AF_INET) |
920 | { | |
616368ed | 921 | struct prefix p; |
718e3744 | 922 | |
923 | p.family = AF_INET; | |
616368ed | 924 | p.u.prefix4 = dest.sin.sin_addr; |
718e3744 | 925 | if (flags & RTF_HOST) |
926 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
927 | else | |
928 | p.prefixlen = ip_masklen (mask.sin.sin_addr); | |
ca16218d | 929 | |
dc95824a DO |
930 | /* Catch self originated messages and match them against our current RIB. |
931 | * At the same time, ignore unconfirmed messages, they should be tracked | |
932 | * by rtm_write() and kernel_rtm_ipv4(). | |
933 | */ | |
96934e6a | 934 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) |
dc95824a | 935 | { |
35d921cc | 936 | char buf[PREFIX_STRLEN], gate_buf[INET_ADDRSTRLEN]; |
dc95824a | 937 | int ret; |
dc95824a DO |
938 | if (! IS_ZEBRA_DEBUG_RIB) |
939 | return; | |
78104b9b FL |
940 | ret = rib_lookup_ipv4_route (&p, &gate, VRF_DEFAULT); |
941 | prefix2str (&p, buf, sizeof(buf)); | |
dc95824a DO |
942 | switch (rtm->rtm_type) |
943 | { | |
944 | case RTM_ADD: | |
945 | case RTM_GET: | |
946 | case RTM_CHANGE: | |
947 | /* The kernel notifies us about a new route in FIB created by us. | |
948 | Do we have a correspondent entry in our RIB? */ | |
949 | switch (ret) | |
950 | { | |
951 | case ZEBRA_RIB_NOTFOUND: | |
35d921cc TT |
952 | zlog_debug ("%s: %s %s: desync: RR isn't yet in RIB, while already in FIB", |
953 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
dc95824a DO |
954 | break; |
955 | case ZEBRA_RIB_FOUND_CONNECTED: | |
956 | case ZEBRA_RIB_FOUND_NOGATE: | |
957 | inet_ntop (AF_INET, &gate.sin.sin_addr, gate_buf, INET_ADDRSTRLEN); | |
35d921cc TT |
958 | zlog_debug ("%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)", |
959 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf, gate_buf); | |
dc95824a DO |
960 | break; |
961 | case ZEBRA_RIB_FOUND_EXACT: /* RIB RR == FIB RR */ | |
35d921cc TT |
962 | zlog_debug ("%s: %s %s: done Ok", |
963 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 964 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
965 | return; |
966 | break; | |
967 | } | |
968 | break; | |
969 | case RTM_DELETE: | |
970 | /* The kernel notifies us about a route deleted by us. Do we still | |
971 | have it in the RIB? Do we have anything instead? */ | |
972 | switch (ret) | |
973 | { | |
974 | case ZEBRA_RIB_FOUND_EXACT: | |
35d921cc TT |
975 | zlog_debug ("%s: %s %s: desync: RR is still in RIB, while already not in FIB", |
976 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 977 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
978 | break; |
979 | case ZEBRA_RIB_FOUND_CONNECTED: | |
980 | case ZEBRA_RIB_FOUND_NOGATE: | |
35d921cc TT |
981 | zlog_debug ("%s: %s %s: desync: RR is still in RIB, plus gate differs", |
982 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 983 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
984 | break; |
985 | case ZEBRA_RIB_NOTFOUND: /* RIB RR == FIB RR */ | |
35d921cc TT |
986 | zlog_debug ("%s: %s %s: done Ok", |
987 | __func__, lookup (rtm_type_str, rtm->rtm_type), buf); | |
8f500a1c | 988 | rib_lookup_and_dump (&p, VRF_DEFAULT); |
dc95824a DO |
989 | return; |
990 | break; | |
991 | } | |
992 | break; | |
993 | default: | |
35d921cc TT |
994 | zlog_debug ("%s: %s: warning: loopback RTM of type %s received", |
995 | __func__, buf, lookup (rtm_type_str, rtm->rtm_type)); | |
dc95824a DO |
996 | } |
997 | return; | |
998 | } | |
999 | ||
ca16218d | 1000 | /* Change, delete the old prefix, we have no further information |
1001 | * to specify the route really | |
1002 | */ | |
1003 | if (rtm->rtm_type == RTM_CHANGE) | |
616368ed DS |
1004 | rib_delete (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1005 | 0, zebra_flags, &p, NULL, 0, 0); | |
ca16218d | 1006 | |
616368ed | 1007 | union g_addr ggate = { .ipv4 = gate.sin.sin_addr }; |
ca16218d | 1008 | if (rtm->rtm_type == RTM_GET |
1009 | || rtm->rtm_type == RTM_ADD | |
1010 | || rtm->rtm_type == RTM_CHANGE) | |
3b1098be DS |
1011 | rib_add (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0, zebra_flags, |
1012 | &p, &ggate, NULL, 0, 0, 0, 0, 0); | |
718e3744 | 1013 | else |
616368ed | 1014 | rib_delete (AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
3b1098be | 1015 | 0, zebra_flags, &p, &ggate, 0, 0); |
718e3744 | 1016 | } |
718e3744 | 1017 | if (dest.sa.sa_family == AF_INET6) |
1018 | { | |
5619f56b DO |
1019 | /* One day we might have a debug section here like one in the |
1020 | * IPv4 case above. Just ignore own messages at the moment. | |
1021 | */ | |
1022 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) | |
1023 | return; | |
616368ed | 1024 | struct prefix p; |
b892f1dd | 1025 | ifindex_t ifindex = 0; |
718e3744 | 1026 | |
1027 | p.family = AF_INET6; | |
616368ed | 1028 | p.u.prefix6 = dest.sin6.sin6_addr; |
718e3744 | 1029 | if (flags & RTF_HOST) |
1030 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1031 | else | |
1032 | p.prefixlen = ip6_masklen (mask.sin6.sin6_addr); | |
1033 | ||
1034 | #ifdef KAME | |
1035 | if (IN6_IS_ADDR_LINKLOCAL (&gate.sin6.sin6_addr)) | |
1036 | { | |
1037 | ifindex = IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr); | |
1038 | SET_IN6_LINKLOCAL_IFINDEX (gate.sin6.sin6_addr, 0); | |
1039 | } | |
1040 | #endif /* KAME */ | |
1041 | ||
ca16218d | 1042 | /* CHANGE: delete the old prefix, we have no further information |
1043 | * to specify the route really | |
1044 | */ | |
1045 | if (rtm->rtm_type == RTM_CHANGE) | |
616368ed DS |
1046 | rib_delete (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1047 | 0, zebra_flags, &p, NULL, 0, 0); | |
1048 | ||
1049 | union g_addr ggate = { .ipv6 = gate.sin6.sin6_addr }; | |
ca16218d | 1050 | if (rtm->rtm_type == RTM_GET |
1051 | || rtm->rtm_type == RTM_ADD | |
1052 | || rtm->rtm_type == RTM_CHANGE) | |
3b1098be DS |
1053 | rib_add (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1054 | 0, zebra_flags, &p, &ggate, NULL, ifindex, | |
1055 | 0, 0, 0, 0); | |
718e3744 | 1056 | else |
616368ed DS |
1057 | rib_delete (AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, |
1058 | 0, zebra_flags, &p, &ggate, ifindex, 0); | |
718e3744 | 1059 | } |
718e3744 | 1060 | } |
1061 | ||
1062 | /* Interface function for the kernel routing table updates. Support | |
6621ca86 | 1063 | * for RTM_CHANGE will be needed. |
1064 | * Exported only for rt_socket.c | |
1065 | */ | |
718e3744 | 1066 | int |
1067 | rtm_write (int message, | |
1068 | union sockunion *dest, | |
1069 | union sockunion *mask, | |
1070 | union sockunion *gate, | |
1071 | unsigned int index, | |
1072 | int zebra_flags, | |
1073 | int metric) | |
1074 | { | |
1075 | int ret; | |
1076 | caddr_t pnt; | |
1077 | struct interface *ifp; | |
718e3744 | 1078 | |
1079 | /* Sequencial number of routing message. */ | |
1080 | static int msg_seq = 0; | |
1081 | ||
1082 | /* Struct of rt_msghdr and buffer for storing socket's data. */ | |
1083 | struct | |
1084 | { | |
1085 | struct rt_msghdr rtm; | |
1086 | char buf[512]; | |
1087 | } msg; | |
1088 | ||
718e3744 | 1089 | if (routing_sock < 0) |
1090 | return ZEBRA_ERR_EPERM; | |
1091 | ||
1092 | /* Clear and set rt_msghdr values */ | |
1093 | memset (&msg, 0, sizeof (struct rt_msghdr)); | |
1094 | msg.rtm.rtm_version = RTM_VERSION; | |
1095 | msg.rtm.rtm_type = message; | |
1096 | msg.rtm.rtm_seq = msg_seq++; | |
1097 | msg.rtm.rtm_addrs = RTA_DST; | |
1098 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
1099 | msg.rtm.rtm_flags = RTF_UP; | |
1100 | msg.rtm.rtm_index = index; | |
1101 | ||
1102 | if (metric != 0) | |
1103 | { | |
1104 | msg.rtm.rtm_rmx.rmx_hopcount = metric; | |
1105 | msg.rtm.rtm_inits |= RTV_HOPCOUNT; | |
1106 | } | |
1107 | ||
1108 | ifp = if_lookup_by_index (index); | |
1109 | ||
1110 | if (gate && message == RTM_ADD) | |
1111 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
1112 | ||
e6f148e6 DW |
1113 | /* When RTF_CLONING is unavailable on BSD, should we set some |
1114 | * other flag instead? | |
1115 | */ | |
1116 | #ifdef RTF_CLONING | |
718e3744 | 1117 | if (! gate && message == RTM_ADD && ifp && |
1118 | (ifp->flags & IFF_POINTOPOINT) == 0) | |
1119 | msg.rtm.rtm_flags |= RTF_CLONING; | |
e6f148e6 | 1120 | #endif /* RTF_CLONING */ |
718e3744 | 1121 | |
1122 | /* If no protocol specific gateway is specified, use link | |
1123 | address for gateway. */ | |
1124 | if (! gate) | |
1125 | { | |
1126 | if (!ifp) | |
1127 | { | |
dc95824a DO |
1128 | char dest_buf[INET_ADDRSTRLEN] = "NULL", mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; |
1129 | if (dest) | |
1130 | inet_ntop (AF_INET, &dest->sin.sin_addr, dest_buf, INET_ADDRSTRLEN); | |
1131 | if (mask) | |
1132 | inet_ntop (AF_INET, &mask->sin.sin_addr, mask_buf, INET_ADDRSTRLEN); | |
1133 | zlog_warn ("%s: %s/%s: gate == NULL and no gateway found for ifindex %d", | |
1134 | __func__, dest_buf, mask_buf, index); | |
718e3744 | 1135 | return -1; |
1136 | } | |
8ccc7e80 | 1137 | gate = (union sockunion *) &((struct zebra_if *)ifp->info)->sdl; |
718e3744 | 1138 | } |
1139 | ||
1140 | if (mask) | |
1141 | msg.rtm.rtm_addrs |= RTA_NETMASK; | |
1142 | else if (message == RTM_ADD) | |
1143 | msg.rtm.rtm_flags |= RTF_HOST; | |
1144 | ||
1145 | /* Tagging route with flags */ | |
1146 | msg.rtm.rtm_flags |= (RTF_PROTO1); | |
1147 | ||
1148 | /* Additional flags. */ | |
1149 | if (zebra_flags & ZEBRA_FLAG_BLACKHOLE) | |
1150 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
81dfcaa2 | 1151 | if (zebra_flags & ZEBRA_FLAG_REJECT) |
1152 | msg.rtm.rtm_flags |= RTF_REJECT; | |
1153 | ||
718e3744 | 1154 | |
718e3744 | 1155 | #define SOCKADDRSET(X,R) \ |
1156 | if (msg.rtm.rtm_addrs & (R)) \ | |
1157 | { \ | |
6fe70d1b | 1158 | int len = SAROUNDUP (X); \ |
718e3744 | 1159 | memcpy (pnt, (caddr_t)(X), len); \ |
1160 | pnt += len; \ | |
1161 | } | |
718e3744 | 1162 | |
1163 | pnt = (caddr_t) msg.buf; | |
1164 | ||
1165 | /* Write each socket data into rtm message buffer */ | |
1166 | SOCKADDRSET (dest, RTA_DST); | |
1167 | SOCKADDRSET (gate, RTA_GATEWAY); | |
1168 | SOCKADDRSET (mask, RTA_NETMASK); | |
1169 | ||
1170 | msg.rtm.rtm_msglen = pnt - (caddr_t) &msg; | |
1171 | ||
1172 | ret = write (routing_sock, &msg, msg.rtm.rtm_msglen); | |
1173 | ||
1174 | if (ret != msg.rtm.rtm_msglen) | |
1175 | { | |
1176 | if (errno == EEXIST) | |
1177 | return ZEBRA_ERR_RTEXIST; | |
1178 | if (errno == ENETUNREACH) | |
1179 | return ZEBRA_ERR_RTUNREACH; | |
dc95824a DO |
1180 | if (errno == ESRCH) |
1181 | return ZEBRA_ERR_RTNOEXIST; | |
718e3744 | 1182 | |
dc95824a DO |
1183 | zlog_warn ("%s: write : %s (%d)", __func__, safe_strerror (errno), errno); |
1184 | return ZEBRA_ERR_KERNEL; | |
718e3744 | 1185 | } |
dc95824a | 1186 | return ZEBRA_ERR_NOERROR; |
718e3744 | 1187 | } |
1188 | ||
6b0655a2 | 1189 | |
718e3744 | 1190 | #include "thread.h" |
1191 | #include "zebra/zserv.h" | |
1192 | ||
718e3744 | 1193 | /* For debug purpose. */ |
b6178002 | 1194 | static void |
718e3744 | 1195 | rtmsg_debug (struct rt_msghdr *rtm) |
1196 | { | |
2d844524 | 1197 | zlog_debug ("Kernel: Len: %d Type: %s", rtm->rtm_msglen, lookup (rtm_type_str, rtm->rtm_type)); |
718e3744 | 1198 | rtm_flag_dump (rtm->rtm_flags); |
b6178002 | 1199 | zlog_debug ("Kernel: message seq %d", rtm->rtm_seq); |
fb4ca3e7 DL |
1200 | zlog_debug ("Kernel: pid %lld, rtm_addrs 0x%x", |
1201 | (long long)rtm->rtm_pid, rtm->rtm_addrs); | |
718e3744 | 1202 | } |
1203 | ||
1204 | /* This is pretty gross, better suggestions welcome -- mhandler */ | |
1205 | #ifndef RTAX_MAX | |
1206 | #ifdef RTA_NUMBITS | |
1207 | #define RTAX_MAX RTA_NUMBITS | |
1208 | #else | |
1209 | #define RTAX_MAX 8 | |
1210 | #endif /* RTA_NUMBITS */ | |
1211 | #endif /* RTAX_MAX */ | |
1212 | ||
1213 | /* Kernel routing table and interface updates via routing socket. */ | |
6621ca86 | 1214 | static int |
718e3744 | 1215 | kernel_read (struct thread *thread) |
1216 | { | |
1217 | int sock; | |
1218 | int nbytes; | |
1219 | struct rt_msghdr *rtm; | |
1220 | ||
dbee01fe | 1221 | /* |
1222 | * This must be big enough for any message the kernel might send. | |
b27900b7 | 1223 | * Rather than determining how many sockaddrs of what size might be |
1224 | * in each particular message, just use RTAX_MAX of sockaddr_storage | |
1225 | * for each. Note that the sockaddrs must be after each message | |
1226 | * definition, or rather after whichever happens to be the largest, | |
1227 | * since the buffer needs to be big enough for a message and the | |
1228 | * sockaddrs together. | |
dbee01fe | 1229 | */ |
718e3744 | 1230 | union |
1231 | { | |
1232 | /* Routing information. */ | |
1233 | struct | |
1234 | { | |
1235 | struct rt_msghdr rtm; | |
b27900b7 | 1236 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1237 | } r; |
1238 | ||
1239 | /* Interface information. */ | |
1240 | struct | |
1241 | { | |
1242 | struct if_msghdr ifm; | |
b27900b7 | 1243 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1244 | } im; |
1245 | ||
1246 | /* Interface address information. */ | |
1247 | struct | |
1248 | { | |
1249 | struct ifa_msghdr ifa; | |
b27900b7 | 1250 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1251 | } ia; |
1252 | ||
1253 | #ifdef RTM_IFANNOUNCE | |
1254 | /* Interface arrival/departure */ | |
1255 | struct | |
1256 | { | |
1257 | struct if_announcemsghdr ifan; | |
b27900b7 | 1258 | struct sockaddr_storage addr[RTAX_MAX]; |
718e3744 | 1259 | } ian; |
1260 | #endif /* RTM_IFANNOUNCE */ | |
1261 | ||
1262 | } buf; | |
1263 | ||
1264 | /* Fetch routing socket. */ | |
1265 | sock = THREAD_FD (thread); | |
1266 | ||
1267 | nbytes= read (sock, &buf, sizeof buf); | |
1268 | ||
1269 | if (nbytes <= 0) | |
1270 | { | |
1271 | if (nbytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN) | |
6099b3b5 | 1272 | zlog_warn ("routing socket error: %s", safe_strerror (errno)); |
718e3744 | 1273 | return 0; |
1274 | } | |
1275 | ||
9bcdb638 | 1276 | thread_add_read (zebrad.master, kernel_read, NULL, sock); |
718e3744 | 1277 | |
726f9b2b | 1278 | if (IS_ZEBRA_DEBUG_KERNEL) |
1279 | rtmsg_debug (&buf.r.rtm); | |
718e3744 | 1280 | |
1281 | rtm = &buf.r.rtm; | |
1282 | ||
b27900b7 | 1283 | /* |
1284 | * Ensure that we didn't drop any data, so that processing routines | |
1285 | * can assume they have the whole message. | |
1286 | */ | |
da26e3b6 | 1287 | if (rtm->rtm_msglen != nbytes) |
1288 | { | |
1289 | zlog_warn ("kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n", | |
1290 | rtm->rtm_msglen, nbytes, rtm->rtm_type); | |
1291 | return -1; | |
1292 | } | |
1293 | ||
718e3744 | 1294 | switch (rtm->rtm_type) |
1295 | { | |
1296 | case RTM_ADD: | |
1297 | case RTM_DELETE: | |
ca16218d | 1298 | case RTM_CHANGE: |
718e3744 | 1299 | rtm_read (rtm); |
1300 | break; | |
1301 | case RTM_IFINFO: | |
1302 | ifm_read (&buf.im.ifm); | |
1303 | break; | |
1304 | case RTM_NEWADDR: | |
1305 | case RTM_DELADDR: | |
1306 | ifam_read (&buf.ia.ifa); | |
1307 | break; | |
1308 | #ifdef RTM_IFANNOUNCE | |
1309 | case RTM_IFANNOUNCE: | |
1310 | ifan_read (&buf.ian.ifan); | |
1311 | break; | |
1312 | #endif /* RTM_IFANNOUNCE */ | |
1313 | default: | |
726f9b2b | 1314 | if (IS_ZEBRA_DEBUG_KERNEL) |
b6178002 | 1315 | zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); |
718e3744 | 1316 | break; |
1317 | } | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | /* Make routing socket. */ | |
6621ca86 | 1322 | static void |
12f6fb97 | 1323 | routing_socket (struct zebra_ns *zns) |
718e3744 | 1324 | { |
edd7c245 | 1325 | if ( zserv_privs.change (ZPRIVS_RAISE) ) |
1326 | zlog_err ("routing_socket: Can't raise privileges"); | |
1327 | ||
718e3744 | 1328 | routing_sock = socket (AF_ROUTE, SOCK_RAW, 0); |
1329 | ||
1330 | if (routing_sock < 0) | |
1331 | { | |
edd7c245 | 1332 | if ( zserv_privs.change (ZPRIVS_LOWER) ) |
1333 | zlog_err ("routing_socket: Can't lower privileges"); | |
718e3744 | 1334 | zlog_warn ("Can't init kernel routing socket"); |
1335 | return; | |
1336 | } | |
1337 | ||
865b852c | 1338 | /* XXX: Socket should be NONBLOCK, however as we currently |
1339 | * discard failed writes, this will lead to inconsistencies. | |
1340 | * For now, socket must be blocking. | |
1341 | */ | |
1342 | /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) | |
1343 | zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ | |
1344 | ||
edd7c245 | 1345 | if ( zserv_privs.change (ZPRIVS_LOWER) ) |
1346 | zlog_err ("routing_socket: Can't lower privileges"); | |
718e3744 | 1347 | |
1348 | /* kernel_read needs rewrite. */ | |
9bcdb638 | 1349 | thread_add_read (zebrad.master, kernel_read, NULL, routing_sock); |
718e3744 | 1350 | } |
1351 | ||
1352 | /* Exported interface function. This function simply calls | |
1353 | routing_socket (). */ | |
1354 | void | |
12f6fb97 | 1355 | kernel_init (struct zebra_ns *zns) |
8f7d9fc0 | 1356 | { |
12f6fb97 | 1357 | routing_socket (zns); |
8f7d9fc0 FL |
1358 | } |
1359 | ||
1360 | void | |
12f6fb97 | 1361 | kernel_terminate (struct zebra_ns *zns) |
718e3744 | 1362 | { |
8f7d9fc0 | 1363 | return; |
718e3744 | 1364 | } |