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718e3744 | 1 | /* Kernel communication using routing socket. |
2 | * Copyright (C) 1999 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifndef HAVE_NETLINK | |
24 | ||
8ccc7e80 | 25 | #include <net/if_types.h> |
fe6c7157 | 26 | #ifdef __OpenBSD__ |
d3e2c74a RW |
27 | #include <netmpls/mpls.h> |
28 | #endif | |
718e3744 | 29 | |
30 | #include "if.h" | |
31 | #include "prefix.h" | |
32 | #include "sockunion.h" | |
33 | #include "connected.h" | |
34 | #include "memory.h" | |
4a1ab8e4 | 35 | #include "zebra_memory.h" |
718e3744 | 36 | #include "ioctl.h" |
37 | #include "log.h" | |
718e3744 | 38 | #include "table.h" |
39 | #include "rib.h" | |
edd7c245 | 40 | #include "privs.h" |
78104b9b | 41 | #include "vrf.h" |
718e3744 | 42 | |
43 | #include "zebra/interface.h" | |
44 | #include "zebra/zserv.h" | |
45 | #include "zebra/debug.h" | |
ec1a4283 | 46 | #include "zebra/kernel_socket.h" |
8f7d9fc0 | 47 | #include "zebra/rib.h" |
718e3744 | 48 | |
edd7c245 | 49 | extern struct zebra_privs_t zserv_privs; |
50 | ||
4bfbea8c | 51 | /* |
cfa0ed09 GT |
52 | * Historically, the BSD routing socket has aligned data following a |
53 | * struct sockaddr to sizeof(long), which was 4 bytes on some | |
54 | * platforms, and 8 bytes on others. NetBSD 6 changed the routing | |
55 | * socket to align to sizeof(uint64_t), which is 8 bytes. OS X | |
56 | * appears to align to sizeof(int), which is 4 bytes. | |
4bfbea8c | 57 | * |
cfa0ed09 GT |
58 | * Alignment of zero-sized sockaddrs is nonsensical, but historically |
59 | * BSD defines RT_ROUNDUP(0) to be the alignment interval (rather than | |
60 | * 0). We follow this practice without questioning it, but it is a | |
61 | * bug if quagga calls ROUNDUP with 0. | |
4bfbea8c | 62 | */ |
cfa0ed09 GT |
63 | |
64 | /* | |
65 | * Because of these varying conventions, the only sane approach is for | |
66 | * the <net/route.h> header to define some flavor of ROUNDUP macro. | |
67 | */ | |
e7f0e649 DL |
68 | |
69 | #if defined(SA_SIZE) | |
70 | /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */ | |
71 | #define SAROUNDUP(a) SA_SIZE(a) | |
72 | #else /* !SA_SIZE */ | |
73 | ||
cfa0ed09 GT |
74 | #if defined(RT_ROUNDUP) |
75 | #define ROUNDUP(a) RT_ROUNDUP(a) | |
76 | #endif /* defined(RT_ROUNDUP) */ | |
77 | ||
f7f9a982 DL |
78 | #if defined(SUNOS_5) |
79 | /* Solaris has struct sockaddr_in[6] definitions at 16 / 32 bytes size, | |
80 | * so the whole concept doesn't really apply. */ | |
81 | #define ROUNDUP(a) (a) | |
82 | #endif | |
83 | ||
cfa0ed09 GT |
84 | /* |
85 | * If ROUNDUP has not yet been defined in terms of platform-provided | |
86 | * defines, attempt to cope with heuristics. | |
87 | */ | |
88 | #if !defined(ROUNDUP) | |
89 | ||
90 | /* | |
adf580f7 DL |
91 | * If you're porting to a platform that changed RT_ROUNDUP but doesn't |
92 | * have it in its headers, this will break rather obviously and you'll | |
93 | * have to fix it here. | |
cfa0ed09 | 94 | */ |
cfa0ed09 GT |
95 | |
96 | /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */ | |
3b33de67 | 97 | #ifdef __APPLE__ |
cfa0ed09 | 98 | #define ROUNDUP_TYPE int |
67320b26 GT |
99 | #else |
100 | #define ROUNDUP_TYPE long | |
3b33de67 | 101 | #endif |
718e3744 | 102 | |
d62a17ae | 103 | #define ROUNDUP(a) \ |
104 | ((a) > 0 ? (1 + (((a)-1) | (sizeof(ROUNDUP_TYPE) - 1))) \ | |
105 | : sizeof(ROUNDUP_TYPE)) | |
cfa0ed09 GT |
106 | |
107 | #endif /* defined(ROUNDUP) */ | |
108 | ||
4bfbea8c | 109 | /* |
110 | * Given a pointer (sockaddr or void *), return the number of bytes | |
111 | * taken up by the sockaddr and any padding needed for alignment. | |
112 | */ | |
6f0e3f6e | 113 | #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN) |
4bfbea8c | 114 | #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len) |
56c1f7d8 | 115 | #else |
4bfbea8c | 116 | /* |
117 | * One would hope all fixed-size structure definitions are aligned, | |
118 | * but round them up nonetheless. | |
119 | */ | |
d62a17ae | 120 | #define SAROUNDUP(X) \ |
121 | (((struct sockaddr *)(X))->sa_family == AF_INET \ | |
122 | ? ROUNDUP(sizeof(struct sockaddr_in)) \ | |
123 | : (((struct sockaddr *)(X))->sa_family == AF_INET6 \ | |
124 | ? ROUNDUP(sizeof(struct sockaddr_in6)) \ | |
125 | : (((struct sockaddr *)(X))->sa_family == AF_LINK \ | |
126 | ? ROUNDUP(sizeof(struct sockaddr_dl)) \ | |
127 | : sizeof(struct sockaddr)))) | |
6f0e3f6e | 128 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ |
718e3744 | 129 | |
e7f0e649 DL |
130 | #endif /* !SA_SIZE */ |
131 | ||
a05df8fd DV |
132 | /* |
133 | * We use a call to an inline function to copy (PNT) to (DEST) | |
134 | * 1. Calculating the length of the copy requires an #ifdef to determine | |
135 | * if sa_len is a field and can't be used directly inside a #define | |
136 | * 2. So the compiler doesn't complain when DEST is NULL, which is only true | |
137 | * when we are skipping the copy and incrementing to the next SA | |
ec1a4283 | 138 | */ |
d62a17ae | 139 | static inline void rta_copy(union sockunion *dest, caddr_t src) |
140 | { | |
141 | int len; | |
142 | if (!dest) | |
143 | return; | |
a05df8fd | 144 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
d62a17ae | 145 | len = (((struct sockaddr *)src)->sa_len > sizeof(*dest)) |
146 | ? sizeof(*dest) | |
147 | : ((struct sockaddr *)src)->sa_len; | |
a05df8fd | 148 | #else |
d62a17ae | 149 | len = (SAROUNDUP(src) > sizeof(*dest)) ? sizeof(*dest) : SAROUNDUP(src); |
a05df8fd | 150 | #endif |
d62a17ae | 151 | memcpy(dest, src, len); |
a05df8fd DV |
152 | } |
153 | ||
d62a17ae | 154 | #define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \ |
155 | if ((RTMADDRS) & (RTA)) { \ | |
156 | int len = SAROUNDUP((PNT)); \ | |
157 | if (af_check(((struct sockaddr *)(PNT))->sa_family)) \ | |
158 | rta_copy((DEST), (PNT)); \ | |
159 | (PNT) += len; \ | |
160 | } | |
161 | #define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \ | |
162 | if ((RTMADDRS) & (RTA)) { \ | |
163 | int len = SAROUNDUP((PNT)); \ | |
164 | rta_copy((DEST), (PNT)); \ | |
165 | (PNT) += len; \ | |
166 | } | |
167 | ||
168 | #define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \ | |
169 | if ((RTMADDRS) & (RTA)) { \ | |
170 | u_char *pdest = (u_char *)(DEST); \ | |
171 | int len = SAROUNDUP((PNT)); \ | |
172 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)(PNT); \ | |
173 | if (IS_ZEBRA_DEBUG_KERNEL) \ | |
174 | zlog_debug("%s: RTA_SDL_GET nlen %d, alen %d", \ | |
175 | __func__, sdl->sdl_nlen, sdl->sdl_alen); \ | |
176 | if (((DEST) != NULL) && (sdl->sdl_family == AF_LINK) \ | |
177 | && (sdl->sdl_nlen < IFNAMSIZ) && (sdl->sdl_nlen <= len)) { \ | |
178 | memcpy(pdest, sdl->sdl_data, sdl->sdl_nlen); \ | |
179 | pdest[sdl->sdl_nlen] = '\0'; \ | |
180 | (LEN) = sdl->sdl_nlen; \ | |
181 | } \ | |
182 | (PNT) += len; \ | |
183 | } else { \ | |
184 | (LEN) = 0; \ | |
185 | } | |
718e3744 | 186 | /* Routing socket message types. */ |
d62a17ae | 187 | const struct message rtm_type_str[] = {{RTM_ADD, "RTM_ADD"}, |
188 | {RTM_DELETE, "RTM_DELETE"}, | |
189 | {RTM_CHANGE, "RTM_CHANGE"}, | |
190 | {RTM_GET, "RTM_GET"}, | |
191 | {RTM_LOSING, "RTM_LOSING"}, | |
192 | {RTM_REDIRECT, "RTM_REDIRECT"}, | |
193 | {RTM_MISS, "RTM_MISS"}, | |
194 | {RTM_LOCK, "RTM_LOCK"}, | |
9458b819 | 195 | #ifdef OLDADD |
d62a17ae | 196 | {RTM_OLDADD, "RTM_OLDADD"}, |
9458b819 GT |
197 | #endif /* RTM_OLDADD */ |
198 | #ifdef RTM_OLDDEL | |
d62a17ae | 199 | {RTM_OLDDEL, "RTM_OLDDEL"}, |
9458b819 | 200 | #endif /* RTM_OLDDEL */ |
d62a17ae | 201 | {RTM_RESOLVE, "RTM_RESOLVE"}, |
202 | {RTM_NEWADDR, "RTM_NEWADDR"}, | |
203 | {RTM_DELADDR, "RTM_DELADDR"}, | |
204 | {RTM_IFINFO, "RTM_IFINFO"}, | |
718e3744 | 205 | #ifdef RTM_OIFINFO |
d62a17ae | 206 | {RTM_OIFINFO, "RTM_OIFINFO"}, |
718e3744 | 207 | #endif /* RTM_OIFINFO */ |
208 | #ifdef RTM_NEWMADDR | |
d62a17ae | 209 | {RTM_NEWMADDR, "RTM_NEWMADDR"}, |
718e3744 | 210 | #endif /* RTM_NEWMADDR */ |
211 | #ifdef RTM_DELMADDR | |
d62a17ae | 212 | {RTM_DELMADDR, "RTM_DELMADDR"}, |
718e3744 | 213 | #endif /* RTM_DELMADDR */ |
214 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 215 | {RTM_IFANNOUNCE, "RTM_IFANNOUNCE"}, |
718e3744 | 216 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 217 | {0}}; |
218 | ||
219 | static const struct message rtm_flag_str[] = {{RTF_UP, "UP"}, | |
220 | {RTF_GATEWAY, "GATEWAY"}, | |
221 | {RTF_HOST, "HOST"}, | |
222 | {RTF_REJECT, "REJECT"}, | |
223 | {RTF_DYNAMIC, "DYNAMIC"}, | |
224 | {RTF_MODIFIED, "MODIFIED"}, | |
225 | {RTF_DONE, "DONE"}, | |
718e3744 | 226 | #ifdef RTF_MASK |
d62a17ae | 227 | {RTF_MASK, "MASK"}, |
718e3744 | 228 | #endif /* RTF_MASK */ |
e6f148e6 | 229 | #ifdef RTF_CLONING |
d62a17ae | 230 | {RTF_CLONING, "CLONING"}, |
e6f148e6 | 231 | #endif /* RTF_CLONING */ |
23b1f400 | 232 | #ifdef RTF_XRESOLVE |
d62a17ae | 233 | {RTF_XRESOLVE, "XRESOLVE"}, |
23b1f400 | 234 | #endif /* RTF_XRESOLVE */ |
c54632ec | 235 | #ifdef RTF_LLINFO |
d62a17ae | 236 | {RTF_LLINFO, "LLINFO"}, |
c54632ec | 237 | #endif /* RTF_LLINFO */ |
d62a17ae | 238 | {RTF_STATIC, "STATIC"}, |
239 | {RTF_BLACKHOLE, "BLACKHOLE"}, | |
6fe70d1b | 240 | #ifdef RTF_PRIVATE |
d62a17ae | 241 | {RTF_PRIVATE, "PRIVATE"}, |
6fe70d1b | 242 | #endif /* RTF_PRIVATE */ |
d62a17ae | 243 | {RTF_PROTO1, "PROTO1"}, |
244 | {RTF_PROTO2, "PROTO2"}, | |
718e3744 | 245 | #ifdef RTF_PRCLONING |
d62a17ae | 246 | {RTF_PRCLONING, "PRCLONING"}, |
718e3744 | 247 | #endif /* RTF_PRCLONING */ |
248 | #ifdef RTF_WASCLONED | |
d62a17ae | 249 | {RTF_WASCLONED, "WASCLONED"}, |
718e3744 | 250 | #endif /* RTF_WASCLONED */ |
251 | #ifdef RTF_PROTO3 | |
d62a17ae | 252 | {RTF_PROTO3, "PROTO3"}, |
718e3744 | 253 | #endif /* RTF_PROTO3 */ |
254 | #ifdef RTF_PINNED | |
d62a17ae | 255 | {RTF_PINNED, "PINNED"}, |
718e3744 | 256 | #endif /* RTF_PINNED */ |
257 | #ifdef RTF_LOCAL | |
d62a17ae | 258 | {RTF_LOCAL, "LOCAL"}, |
718e3744 | 259 | #endif /* RTF_LOCAL */ |
260 | #ifdef RTF_BROADCAST | |
d62a17ae | 261 | {RTF_BROADCAST, "BROADCAST"}, |
718e3744 | 262 | #endif /* RTF_BROADCAST */ |
263 | #ifdef RTF_MULTICAST | |
d62a17ae | 264 | {RTF_MULTICAST, "MULTICAST"}, |
718e3744 | 265 | #endif /* RTF_MULTICAST */ |
6fe70d1b | 266 | #ifdef RTF_MULTIRT |
d62a17ae | 267 | {RTF_MULTIRT, "MULTIRT"}, |
6fe70d1b | 268 | #endif /* RTF_MULTIRT */ |
269 | #ifdef RTF_SETSRC | |
d62a17ae | 270 | {RTF_SETSRC, "SETSRC"}, |
6fe70d1b | 271 | #endif /* RTF_SETSRC */ |
d62a17ae | 272 | {0}}; |
718e3744 | 273 | |
274 | /* Kernel routing update socket. */ | |
275 | int routing_sock = -1; | |
276 | ||
277 | /* Yes I'm checking ugly routing socket behavior. */ | |
278 | /* #define DEBUG */ | |
279 | ||
280 | /* Supported address family check. */ | |
d62a17ae | 281 | static inline int af_check(int family) |
718e3744 | 282 | { |
d62a17ae | 283 | if (family == AF_INET) |
284 | return 1; | |
285 | if (family == AF_INET6) | |
286 | return 1; | |
287 | return 0; | |
718e3744 | 288 | } |
6b0655a2 | 289 | |
718e3744 | 290 | /* Dump routing table flag for debug purpose. */ |
d62a17ae | 291 | static void rtm_flag_dump(int flag) |
718e3744 | 292 | { |
d62a17ae | 293 | const struct message *mes; |
294 | static char buf[BUFSIZ]; | |
295 | ||
296 | buf[0] = '\0'; | |
297 | for (mes = rtm_flag_str; mes->key != 0; mes++) { | |
298 | if (mes->key & flag) { | |
299 | strlcat(buf, mes->str, BUFSIZ); | |
300 | strlcat(buf, " ", BUFSIZ); | |
301 | } | |
718e3744 | 302 | } |
d62a17ae | 303 | zlog_debug("Kernel: %s", buf); |
718e3744 | 304 | } |
305 | ||
306 | #ifdef RTM_IFANNOUNCE | |
307 | /* Interface adding function */ | |
d62a17ae | 308 | static int ifan_read(struct if_announcemsghdr *ifan) |
718e3744 | 309 | { |
d62a17ae | 310 | struct interface *ifp; |
311 | ||
312 | ifp = if_lookup_by_index(ifan->ifan_index, VRF_DEFAULT); | |
313 | ||
314 | if (ifp) | |
315 | assert((ifp->ifindex == ifan->ifan_index) | |
316 | || (ifp->ifindex == IFINDEX_INTERNAL)); | |
317 | ||
9d303b37 DL |
318 | if ((ifp == NULL) || ((ifp->ifindex == IFINDEX_INTERNAL) |
319 | && (ifan->ifan_what == IFAN_ARRIVAL))) { | |
d62a17ae | 320 | if (IS_ZEBRA_DEBUG_KERNEL) |
321 | zlog_debug( | |
322 | "%s: creating interface for ifindex %d, name %s", | |
323 | __func__, ifan->ifan_index, ifan->ifan_name); | |
324 | ||
325 | /* Create Interface */ | |
bcc24579 | 326 | ifp = if_get_by_name(ifan->ifan_name, VRF_DEFAULT, 0); |
ff880b78 | 327 | if_set_index(ifp, ifan->ifan_index); |
d62a17ae | 328 | |
329 | if_get_metric(ifp); | |
330 | if_add_update(ifp); | |
331 | } else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE) | |
332 | if_delete_update(ifp); | |
333 | ||
334 | if_get_flags(ifp); | |
335 | if_get_mtu(ifp); | |
336 | if_get_metric(ifp); | |
337 | ||
338 | if (IS_ZEBRA_DEBUG_KERNEL) | |
339 | zlog_debug("%s: interface %s index %d", __func__, | |
340 | ifan->ifan_name, ifan->ifan_index); | |
341 | ||
342 | return 0; | |
718e3744 | 343 | } |
344 | #endif /* RTM_IFANNOUNCE */ | |
345 | ||
9234b382 | 346 | #ifdef HAVE_BSD_IFI_LINK_STATE |
c543a173 | 347 | /* BSD link detect translation */ |
d62a17ae | 348 | static void bsd_linkdetect_translate(struct if_msghdr *ifm) |
c543a173 | 349 | { |
d62a17ae | 350 | if ((ifm->ifm_data.ifi_link_state >= LINK_STATE_UP) |
351 | || (ifm->ifm_data.ifi_link_state == LINK_STATE_UNKNOWN)) | |
352 | SET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
353 | else | |
354 | UNSET_FLAG(ifm->ifm_flags, IFF_RUNNING); | |
c543a173 | 355 | } |
9234b382 | 356 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 357 | |
d62a17ae | 358 | static enum zebra_link_type sdl_to_zebra_link_type(unsigned int sdlt) |
8ccc7e80 | 359 | { |
d62a17ae | 360 | switch (sdlt) { |
361 | case IFT_ETHER: | |
362 | return ZEBRA_LLT_ETHER; | |
363 | case IFT_X25: | |
364 | return ZEBRA_LLT_X25; | |
365 | case IFT_FDDI: | |
366 | return ZEBRA_LLT_FDDI; | |
367 | case IFT_PPP: | |
368 | return ZEBRA_LLT_PPP; | |
369 | case IFT_LOOP: | |
370 | return ZEBRA_LLT_LOOPBACK; | |
371 | case IFT_SLIP: | |
372 | return ZEBRA_LLT_SLIP; | |
373 | case IFT_ARCNET: | |
374 | return ZEBRA_LLT_ARCNET; | |
375 | case IFT_ATM: | |
376 | return ZEBRA_LLT_ATM; | |
377 | case IFT_LOCALTALK: | |
378 | return ZEBRA_LLT_LOCALTLK; | |
379 | case IFT_HIPPI: | |
380 | return ZEBRA_LLT_HIPPI; | |
8ccc7e80 | 381 | #ifdef IFT_IEEE1394 |
d62a17ae | 382 | case IFT_IEEE1394: |
383 | return ZEBRA_LLT_IEEE1394; | |
8ccc7e80 TT |
384 | #endif |
385 | ||
d62a17ae | 386 | default: |
387 | return ZEBRA_LLT_UNKNOWN; | |
388 | } | |
8ccc7e80 TT |
389 | } |
390 | ||
da26e3b6 | 391 | /* |
392 | * Handle struct if_msghdr obtained from reading routing socket or | |
393 | * sysctl (from interface_list). There may or may not be sockaddrs | |
394 | * present after the header. | |
395 | */ | |
d62a17ae | 396 | int ifm_read(struct if_msghdr *ifm) |
718e3744 | 397 | { |
d62a17ae | 398 | struct interface *ifp = NULL; |
399 | struct sockaddr_dl *sdl; | |
400 | char ifname[IFNAMSIZ]; | |
401 | short ifnlen = 0; | |
402 | caddr_t cp; | |
403 | ||
404 | /* terminate ifname at head (for strnlen) and tail (for safety) */ | |
405 | ifname[IFNAMSIZ - 1] = '\0'; | |
406 | ||
407 | /* paranoia: sanity check structure */ | |
408 | if (ifm->ifm_msglen < sizeof(struct if_msghdr)) { | |
409 | zlog_err("ifm_read: ifm->ifm_msglen %d too short\n", | |
410 | ifm->ifm_msglen); | |
411 | return -1; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Check for a sockaddr_dl following the message. First, point to | |
416 | * where a socakddr might be if one follows the message. | |
417 | */ | |
418 | cp = (void *)(ifm + 1); | |
718e3744 | 419 | |
4bfbea8c | 420 | #ifdef SUNOS_5 |
d62a17ae | 421 | /* |
422 | * XXX This behavior should be narrowed to only the kernel versions | |
423 | * for which the structures returned do not match the headers. | |
424 | * | |
425 | * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions | |
426 | * is 12 bytes larger than the 32 bit version. | |
427 | */ | |
428 | if (((struct sockaddr *)cp)->sa_family == AF_UNSPEC) | |
429 | cp = cp + 12; | |
4bfbea8c | 430 | #endif |
3e95a074 | 431 | |
d62a17ae | 432 | RTA_ADDR_GET(NULL, RTA_DST, ifm->ifm_addrs, cp); |
433 | RTA_ADDR_GET(NULL, RTA_GATEWAY, ifm->ifm_addrs, cp); | |
434 | RTA_ATTR_GET(NULL, RTA_NETMASK, ifm->ifm_addrs, cp); | |
435 | RTA_ADDR_GET(NULL, RTA_GENMASK, ifm->ifm_addrs, cp); | |
436 | sdl = (struct sockaddr_dl *)cp; | |
437 | RTA_NAME_GET(ifname, RTA_IFP, ifm->ifm_addrs, cp, ifnlen); | |
438 | RTA_ADDR_GET(NULL, RTA_IFA, ifm->ifm_addrs, cp); | |
439 | RTA_ADDR_GET(NULL, RTA_AUTHOR, ifm->ifm_addrs, cp); | |
440 | RTA_ADDR_GET(NULL, RTA_BRD, ifm->ifm_addrs, cp); | |
88ed8379 DL |
441 | #ifdef RTA_LABEL |
442 | RTA_ATTR_GET(NULL, RTA_LABEL, ifm->ifm_addrs, cp); | |
443 | #endif | |
444 | #ifdef RTA_SRC | |
445 | RTA_ADDR_GET(NULL, RTA_SRC, ifm->ifm_addrs, cp); | |
446 | #endif | |
d62a17ae | 447 | |
448 | if (IS_ZEBRA_DEBUG_KERNEL) | |
449 | zlog_debug("%s: sdl ifname %s", __func__, | |
450 | (ifnlen ? ifname : "(nil)")); | |
451 | ||
452 | /* | |
453 | * Look up on ifindex first, because ifindices are the primary handle | |
454 | * for | |
455 | * interfaces across the user/kernel boundary, for most systems. (Some | |
456 | * messages, such as up/down status changes on NetBSD, do not include a | |
457 | * sockaddr_dl). | |
458 | */ | |
459 | if ((ifp = if_lookup_by_index(ifm->ifm_index, VRF_DEFAULT)) != NULL) { | |
460 | /* we have an ifp, verify that the name matches as some systems, | |
461 | * eg Solaris, have a 1:many association of ifindex:ifname | |
462 | * if they dont match, we dont have the correct ifp and should | |
463 | * set it back to NULL to let next check do lookup by name | |
464 | */ | |
465 | if (ifnlen && (strncmp(ifp->name, ifname, IFNAMSIZ) != 0)) { | |
466 | if (IS_ZEBRA_DEBUG_KERNEL) | |
467 | zlog_debug( | |
468 | "%s: ifp name %s doesnt match sdl name %s", | |
469 | __func__, ifp->name, ifname); | |
470 | ifp = NULL; | |
471 | } | |
da26e3b6 | 472 | } |
5c78b3d0 | 473 | |
d62a17ae | 474 | /* |
475 | * If we dont have an ifp, try looking up by name. Particularly as some | |
476 | * systems (Solaris) have a 1:many mapping of ifindex:ifname - the | |
477 | * ifname | |
478 | * is therefore our unique handle to that interface. | |
479 | * | |
480 | * Interfaces specified in the configuration file for which the ifindex | |
481 | * has not been determined will have ifindex == IFINDEX_INTERNAL, and | |
482 | * such | |
483 | * interfaces are found by this search, and then their ifindex values | |
484 | * can | |
485 | * be filled in. | |
486 | */ | |
487 | if ((ifp == NULL) && ifnlen) | |
488 | ifp = if_lookup_by_name(ifname, VRF_DEFAULT); | |
489 | ||
490 | /* | |
491 | * If ifp still does not exist or has an invalid index | |
492 | * (IFINDEX_INTERNAL), | |
493 | * create or fill in an interface. | |
494 | */ | |
495 | if ((ifp == NULL) || (ifp->ifindex == IFINDEX_INTERNAL)) { | |
496 | /* | |
497 | * To create or fill in an interface, a sockaddr_dl (via | |
498 | * RTA_IFP) is required. | |
499 | */ | |
500 | if (!ifnlen) { | |
501 | zlog_warn("Interface index %d (new) missing ifname\n", | |
502 | ifm->ifm_index); | |
503 | return -1; | |
504 | } | |
505 | ||
5c78b3d0 | 506 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 507 | /* Down->Down interface should be ignored here. |
508 | * See further comment below. | |
509 | */ | |
510 | if (!CHECK_FLAG(ifm->ifm_flags, IFF_UP)) | |
511 | return 0; | |
5c78b3d0 | 512 | #endif /* !RTM_IFANNOUNCE */ |
d62a17ae | 513 | |
514 | if (ifp == NULL) { | |
515 | /* Interface that zebra was not previously aware of, so | |
516 | * create. */ | |
bcc24579 | 517 | ifp = if_create(ifname, VRF_DEFAULT); |
d62a17ae | 518 | if (IS_ZEBRA_DEBUG_KERNEL) |
519 | zlog_debug("%s: creating ifp for ifindex %d", | |
520 | __func__, ifm->ifm_index); | |
521 | } | |
522 | ||
523 | if (IS_ZEBRA_DEBUG_KERNEL) | |
524 | zlog_debug( | |
525 | "%s: updated/created ifp, ifname %s, ifindex %d", | |
526 | __func__, ifp->name, ifp->ifindex); | |
527 | /* | |
528 | * Fill in newly created interface structure, or larval | |
529 | * structure with ifindex IFINDEX_INTERNAL. | |
530 | */ | |
ff880b78 | 531 | if_set_index(ifp, ifm->ifm_index); |
d62a17ae | 532 | |
9234b382 | 533 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 534 | bsd_linkdetect_translate(ifm); |
9234b382 | 535 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 536 | |
d62a17ae | 537 | if_flags_update(ifp, ifm->ifm_flags); |
718e3744 | 538 | #if defined(__bsdi__) |
d62a17ae | 539 | if_kvm_get_mtu(ifp); |
718e3744 | 540 | #else |
d62a17ae | 541 | if_get_mtu(ifp); |
718e3744 | 542 | #endif /* __bsdi__ */ |
d62a17ae | 543 | if_get_metric(ifp); |
544 | ||
545 | /* | |
546 | * XXX sockaddr_dl contents can be larger than the structure | |
547 | * definition. There are 2 big families here: | |
548 | * - BSD has sdl_len + sdl_data[16] + overruns sdl_data | |
549 | * we MUST use sdl_len here or we'll truncate data. | |
550 | * - Solaris has no sdl_len, but sdl_data[244] | |
551 | * presumably, it's not going to run past that, so sizeof() | |
552 | * is fine here. | |
553 | * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid | |
554 | */ | |
555 | ifp->ll_type = ZEBRA_LLT_UNKNOWN; | |
556 | ifp->hw_addr_len = 0; | |
557 | if (ifnlen) { | |
ca3ccd87 | 558 | #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN |
d62a17ae | 559 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
560 | sdl->sdl_len); | |
ca3ccd87 | 561 | #else |
d62a17ae | 562 | memcpy(&((struct zebra_if *)ifp->info)->sdl, sdl, |
563 | sizeof(struct sockaddr_dl)); | |
ca3ccd87 | 564 | #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */ |
8ccc7e80 | 565 | |
d62a17ae | 566 | ifp->ll_type = sdl_to_zebra_link_type(sdl->sdl_type); |
567 | if (sdl->sdl_alen <= sizeof(ifp->hw_addr)) { | |
568 | memcpy(ifp->hw_addr, LLADDR(sdl), | |
569 | sdl->sdl_alen); | |
570 | ifp->hw_addr_len = sdl->sdl_alen; | |
571 | } | |
572 | } | |
573 | ||
574 | if_add_update(ifp); | |
575 | } else | |
576 | /* | |
577 | * Interface structure exists. Adjust stored flags from | |
578 | * notification. If interface has up->down or down->up | |
579 | * transition, call state change routines (to adjust routes, | |
580 | * notify routing daemons, etc.). (Other flag changes are stored | |
581 | * but apparently do not trigger action.) | |
582 | */ | |
583 | { | |
584 | if (ifp->ifindex != ifm->ifm_index) { | |
585 | zlog_warn( | |
586 | "%s: index mismatch, ifname %s, ifp index %d, " | |
587 | "ifm index %d", | |
588 | __func__, ifp->name, ifp->ifindex, | |
589 | ifm->ifm_index); | |
590 | return -1; | |
591 | } | |
592 | ||
9234b382 | 593 | #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */ |
d62a17ae | 594 | bsd_linkdetect_translate(ifm); |
9234b382 | 595 | #endif /* HAVE_BSD_IFI_LINK_STATE */ |
c543a173 | 596 | |
d62a17ae | 597 | /* update flags and handle operative->inoperative transition, if |
598 | * any */ | |
599 | if_flags_update(ifp, ifm->ifm_flags); | |
600 | ||
6eb8827d | 601 | #ifndef RTM_IFANNOUNCE |
d62a17ae | 602 | if (!if_is_up(ifp)) { |
603 | /* No RTM_IFANNOUNCE on this platform, so we can never | |
604 | * distinguish between ~IFF_UP and delete. We must | |
605 | * presume | |
606 | * it has been deleted. | |
607 | * Eg, Solaris will not notify us of unplumb. | |
608 | * | |
609 | * XXX: Fixme - this should be runtime detected | |
610 | * So that a binary compiled on a system with IFANNOUNCE | |
611 | * will still behave correctly if run on a platform | |
612 | * without | |
613 | */ | |
614 | if_delete_update(ifp); | |
615 | } | |
6eb8827d | 616 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 617 | if (if_is_up(ifp)) { |
1ba27564 | 618 | #if defined(__bsdi__) |
d62a17ae | 619 | if_kvm_get_mtu(ifp); |
1ba27564 | 620 | #else |
d62a17ae | 621 | if_get_mtu(ifp); |
1ba27564 | 622 | #endif /* __bsdi__ */ |
d62a17ae | 623 | if_get_metric(ifp); |
624 | } | |
625 | } | |
5c78b3d0 | 626 | |
718e3744 | 627 | #ifdef HAVE_NET_RT_IFLIST |
d62a17ae | 628 | ifp->stats = ifm->ifm_data; |
718e3744 | 629 | #endif /* HAVE_NET_RT_IFLIST */ |
04427fcb | 630 | ifp->speed = ifm->ifm_data.ifi_baudrate / 1000000; |
718e3744 | 631 | |
d62a17ae | 632 | if (IS_ZEBRA_DEBUG_KERNEL) |
633 | zlog_debug("%s: interface %s index %d", __func__, ifp->name, | |
634 | ifp->ifindex); | |
718e3744 | 635 | |
d62a17ae | 636 | return 0; |
718e3744 | 637 | } |
6b0655a2 | 638 | |
718e3744 | 639 | /* Address read from struct ifa_msghdr. */ |
d62a17ae | 640 | static void ifam_read_mesg(struct ifa_msghdr *ifm, union sockunion *addr, |
641 | union sockunion *mask, union sockunion *brd, | |
642 | char *ifname, short *ifnlen) | |
718e3744 | 643 | { |
d62a17ae | 644 | caddr_t pnt, end; |
645 | union sockunion dst; | |
646 | union sockunion gateway; | |
647 | ||
648 | pnt = (caddr_t)(ifm + 1); | |
649 | end = ((caddr_t)ifm) + ifm->ifam_msglen; | |
650 | ||
651 | /* Be sure structure is cleared */ | |
652 | memset(mask, 0, sizeof(union sockunion)); | |
653 | memset(addr, 0, sizeof(union sockunion)); | |
654 | memset(brd, 0, sizeof(union sockunion)); | |
655 | memset(&dst, 0, sizeof(union sockunion)); | |
656 | memset(&gateway, 0, sizeof(union sockunion)); | |
657 | ||
658 | /* We fetch each socket variable into sockunion. */ | |
659 | RTA_ADDR_GET(&dst, RTA_DST, ifm->ifam_addrs, pnt); | |
660 | RTA_ADDR_GET(&gateway, RTA_GATEWAY, ifm->ifam_addrs, pnt); | |
661 | RTA_ATTR_GET(mask, RTA_NETMASK, ifm->ifam_addrs, pnt); | |
662 | RTA_ADDR_GET(NULL, RTA_GENMASK, ifm->ifam_addrs, pnt); | |
663 | RTA_NAME_GET(ifname, RTA_IFP, ifm->ifam_addrs, pnt, *ifnlen); | |
664 | RTA_ADDR_GET(addr, RTA_IFA, ifm->ifam_addrs, pnt); | |
665 | RTA_ADDR_GET(NULL, RTA_AUTHOR, ifm->ifam_addrs, pnt); | |
666 | RTA_ADDR_GET(brd, RTA_BRD, ifm->ifam_addrs, pnt); | |
88ed8379 DL |
667 | #ifdef RTA_LABEL |
668 | RTA_ATTR_GET(NULL, RTA_LABEL, ifm->ifam_addrs, pnt); | |
669 | #endif | |
670 | #ifdef RTA_SRC | |
671 | RTA_ADDR_GET(NULL, RTA_SRC, ifm->ifam_addrs, pnt); | |
672 | #endif | |
d62a17ae | 673 | |
674 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
675 | int family = sockunion_family(addr); | |
676 | switch (family) { | |
677 | case AF_INET: | |
678 | case AF_INET6: { | |
679 | char buf[4][INET6_ADDRSTRLEN]; | |
680 | zlog_debug( | |
681 | "%s: ifindex %d, ifname %s, ifam_addrs 0x%x, " | |
682 | "ifam_flags 0x%x, addr %s/%d broad %s dst %s " | |
683 | "gateway %s", | |
684 | __func__, ifm->ifam_index, | |
685 | (ifnlen ? ifname : "(nil)"), ifm->ifam_addrs, | |
686 | ifm->ifam_flags, | |
687 | inet_ntop(family, &addr->sin.sin_addr, buf[0], | |
688 | sizeof(buf[0])), | |
689 | ip_masklen(mask->sin.sin_addr), | |
690 | inet_ntop(family, &brd->sin.sin_addr, buf[1], | |
691 | sizeof(buf[1])), | |
692 | inet_ntop(family, &dst.sin.sin_addr, buf[2], | |
693 | sizeof(buf[2])), | |
694 | inet_ntop(family, &gateway.sin.sin_addr, buf[3], | |
695 | sizeof(buf[3]))); | |
696 | } break; | |
697 | default: | |
698 | zlog_debug("%s: ifindex %d, ifname %s, ifam_addrs 0x%x", | |
699 | __func__, ifm->ifam_index, | |
700 | (ifnlen ? ifname : "(nil)"), | |
701 | ifm->ifam_addrs); | |
702 | break; | |
703 | } | |
704 | } | |
705 | ||
706 | /* Assert read up end point matches to end point */ | |
707 | if (pnt != end) | |
708 | zlog_warn("ifam_read() doesn't read all socket data"); | |
718e3744 | 709 | } |
710 | ||
711 | /* Interface's address information get. */ | |
d62a17ae | 712 | int ifam_read(struct ifa_msghdr *ifam) |
718e3744 | 713 | { |
d62a17ae | 714 | struct interface *ifp = NULL; |
715 | union sockunion addr, mask, brd; | |
716 | char ifname[INTERFACE_NAMSIZ]; | |
717 | short ifnlen = 0; | |
718 | char isalias = 0; | |
719 | int flags = 0; | |
720 | ||
721 | ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0'; | |
722 | ||
723 | /* Allocate and read address information. */ | |
724 | ifam_read_mesg(ifam, &addr, &mask, &brd, ifname, &ifnlen); | |
725 | ||
726 | if ((ifp = if_lookup_by_index(ifam->ifam_index, VRF_DEFAULT)) == NULL) { | |
727 | zlog_warn("%s: no interface for ifname %s, index %d", __func__, | |
728 | ifname, ifam->ifam_index); | |
729 | return -1; | |
730 | } | |
731 | ||
732 | if (ifnlen && strncmp(ifp->name, ifname, INTERFACE_NAMSIZ)) | |
733 | isalias = 1; | |
734 | ||
735 | /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD | |
736 | field contains a broadcast address or a peer address, so we are | |
737 | forced to | |
738 | rely upon the interface type. */ | |
739 | if (if_is_pointopoint(ifp)) | |
740 | SET_FLAG(flags, ZEBRA_IFA_PEER); | |
7ab62c53 | 741 | |
6502208c PJ |
742 | #if 0 |
743 | /* it might seem cute to grab the interface metric here, however | |
744 | * we're processing an address update message, and so some systems | |
745 | * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left | |
746 | * in deliberately, as comment. | |
747 | */ | |
d34b8991 | 748 | ifp->metric = ifam->ifam_metric; |
6502208c PJ |
749 | #endif |
750 | ||
d62a17ae | 751 | /* Add connected address. */ |
752 | switch (sockunion_family(&addr)) { | |
753 | case AF_INET: | |
754 | if (ifam->ifam_type == RTM_NEWADDR) | |
755 | connected_add_ipv4(ifp, flags, &addr.sin.sin_addr, | |
756 | ip_masklen(mask.sin.sin_addr), | |
757 | &brd.sin.sin_addr, | |
758 | (isalias ? ifname : NULL)); | |
759 | else | |
760 | connected_delete_ipv4(ifp, flags, &addr.sin.sin_addr, | |
761 | ip_masklen(mask.sin.sin_addr), | |
762 | &brd.sin.sin_addr); | |
763 | break; | |
764 | case AF_INET6: | |
765 | /* Unset interface index from link-local address when IPv6 stack | |
766 | is KAME. */ | |
767 | if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6.sin6_addr)) { | |
768 | SET_IN6_LINKLOCAL_IFINDEX(addr.sin6.sin6_addr, 0); | |
769 | } | |
770 | ||
771 | if (ifam->ifam_type == RTM_NEWADDR) | |
772 | connected_add_ipv6(ifp, flags, &addr.sin6.sin6_addr, | |
773 | ip6_masklen(mask.sin6.sin6_addr), | |
d62a17ae | 774 | (isalias ? ifname : NULL)); |
775 | else | |
776 | connected_delete_ipv6(ifp, &addr.sin6.sin6_addr, | |
608105a7 | 777 | ip6_masklen(mask.sin6.sin6_addr)); |
d62a17ae | 778 | break; |
779 | default: | |
780 | /* Unsupported family silently ignore... */ | |
781 | break; | |
782 | } | |
783 | ||
784 | /* Check interface flag for implicit up of the interface. */ | |
785 | if_refresh(ifp); | |
5c78b3d0 | 786 | |
787 | #ifdef SUNOS_5 | |
d62a17ae | 788 | /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange. |
789 | * See comments for SUNOS_5 in interface.c::if_flags_mangle. | |
790 | * | |
791 | * Here we take care of case where the real IFF_UP was previously | |
792 | * unset (as kept in struct zebra_if.primary_state) and the mangled | |
793 | * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned | |
794 | * to unset due to the lost non-primary address having DELADDR'd. | |
795 | * | |
796 | * we must delete the interface, because in between here and next | |
797 | * event for this interface-name the administrator could unplumb | |
798 | * and replumb the interface. | |
799 | */ | |
800 | if (!if_is_up(ifp)) | |
801 | if_delete_update(ifp); | |
5c78b3d0 | 802 | #endif /* SUNOS_5 */ |
d62a17ae | 803 | |
804 | return 0; | |
718e3744 | 805 | } |
6b0655a2 | 806 | |
718e3744 | 807 | /* Interface function for reading kernel routing table information. */ |
d62a17ae | 808 | static int rtm_read_mesg(struct rt_msghdr *rtm, union sockunion *dest, |
809 | union sockunion *mask, union sockunion *gate, | |
810 | char *ifname, short *ifnlen) | |
718e3744 | 811 | { |
d62a17ae | 812 | caddr_t pnt, end; |
813 | ||
814 | /* Pnt points out socket data start point. */ | |
815 | pnt = (caddr_t)(rtm + 1); | |
816 | end = ((caddr_t)rtm) + rtm->rtm_msglen; | |
817 | ||
818 | /* rt_msghdr version check. */ | |
819 | if (rtm->rtm_version != RTM_VERSION) | |
820 | zlog_warn( | |
821 | "Routing message version different %d should be %d." | |
822 | "This may cause problem\n", | |
823 | rtm->rtm_version, RTM_VERSION); | |
824 | ||
825 | /* Be sure structure is cleared */ | |
826 | memset(dest, 0, sizeof(union sockunion)); | |
827 | memset(gate, 0, sizeof(union sockunion)); | |
828 | memset(mask, 0, sizeof(union sockunion)); | |
829 | ||
830 | /* We fetch each socket variable into sockunion. */ | |
831 | RTA_ADDR_GET(dest, RTA_DST, rtm->rtm_addrs, pnt); | |
832 | RTA_ADDR_GET(gate, RTA_GATEWAY, rtm->rtm_addrs, pnt); | |
833 | RTA_ATTR_GET(mask, RTA_NETMASK, rtm->rtm_addrs, pnt); | |
834 | RTA_ADDR_GET(NULL, RTA_GENMASK, rtm->rtm_addrs, pnt); | |
835 | RTA_NAME_GET(ifname, RTA_IFP, rtm->rtm_addrs, pnt, *ifnlen); | |
836 | RTA_ADDR_GET(NULL, RTA_IFA, rtm->rtm_addrs, pnt); | |
837 | RTA_ADDR_GET(NULL, RTA_AUTHOR, rtm->rtm_addrs, pnt); | |
838 | RTA_ADDR_GET(NULL, RTA_BRD, rtm->rtm_addrs, pnt); | |
88ed8379 DL |
839 | #ifdef RTA_LABEL |
840 | #if 0 | |
841 | union sockunion label; | |
842 | memset(&label, 0, sizeof(label)); | |
843 | RTA_ATTR_GET(&label, RTA_LABEL, rtm->rtm_addrs, pnt); | |
844 | #endif | |
845 | RTA_ATTR_GET(NULL, RTA_LABEL, rtm->rtm_addrs, pnt); | |
846 | #endif | |
847 | #ifdef RTA_SRC | |
848 | RTA_ADDR_GET(NULL, RTA_SRC, rtm->rtm_addrs, pnt); | |
849 | #endif | |
d62a17ae | 850 | |
851 | /* If there is netmask information set it's family same as | |
852 | destination family*/ | |
853 | if (rtm->rtm_addrs & RTA_NETMASK) | |
854 | mask->sa.sa_family = dest->sa.sa_family; | |
855 | ||
856 | /* Assert read up to the end of pointer. */ | |
857 | if (pnt != end) | |
858 | zlog_warn("rtm_read() doesn't read all socket data."); | |
859 | ||
860 | return rtm->rtm_flags; | |
718e3744 | 861 | } |
862 | ||
d62a17ae | 863 | void rtm_read(struct rt_msghdr *rtm) |
718e3744 | 864 | { |
d62a17ae | 865 | int flags; |
866 | u_char zebra_flags; | |
867 | union sockunion dest, mask, gate; | |
868 | char ifname[INTERFACE_NAMSIZ + 1]; | |
869 | short ifnlen = 0; | |
fd36be7e | 870 | struct nexthop nh; |
d62a17ae | 871 | |
872 | zebra_flags = 0; | |
873 | ||
874 | /* Read destination and netmask and gateway from rtm message | |
875 | structure. */ | |
876 | flags = rtm_read_mesg(rtm, &dest, &mask, &gate, ifname, &ifnlen); | |
877 | if (!(flags & RTF_DONE)) | |
878 | return; | |
879 | if (IS_ZEBRA_DEBUG_KERNEL) | |
880 | zlog_debug("%s: got rtm of type %d (%s)", __func__, | |
881 | rtm->rtm_type, | |
882 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); | |
883 | ||
884 | #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/ | |
885 | if (flags & RTF_CLONED) | |
886 | return; | |
718e3744 | 887 | #endif |
d62a17ae | 888 | #ifdef RTF_WASCLONED /*freebsd*/ |
889 | if (flags & RTF_WASCLONED) | |
890 | return; | |
718e3744 | 891 | #endif |
892 | ||
d62a17ae | 893 | if ((rtm->rtm_type == RTM_ADD || rtm->rtm_type == RTM_CHANGE) |
894 | && !(flags & RTF_UP)) | |
895 | return; | |
896 | ||
897 | /* This is connected route. */ | |
898 | if (!(flags & RTF_GATEWAY)) | |
899 | return; | |
900 | ||
901 | if (flags & RTF_PROTO1) | |
902 | SET_FLAG(zebra_flags, ZEBRA_FLAG_SELFROUTE); | |
903 | ||
904 | /* This is persistent route. */ | |
905 | if (flags & RTF_STATIC) | |
906 | SET_FLAG(zebra_flags, ZEBRA_FLAG_STATIC); | |
907 | ||
a8309422 | 908 | memset(&nh, 0, sizeof(nh)); |
d62a17ae | 909 | /* This is a reject or blackhole route */ |
a8309422 DL |
910 | if (flags & RTF_REJECT) { |
911 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
912 | nh.bh_type = BLACKHOLE_REJECT; | |
913 | } else if (flags & RTF_BLACKHOLE) { | |
914 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
915 | nh.bh_type = BLACKHOLE_NULL; | |
916 | } | |
d62a17ae | 917 | |
918 | if (dest.sa.sa_family == AF_INET) { | |
919 | struct prefix p; | |
920 | ||
921 | p.family = AF_INET; | |
922 | p.u.prefix4 = dest.sin.sin_addr; | |
923 | if (flags & RTF_HOST) | |
924 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
925 | else | |
926 | p.prefixlen = ip_masklen(mask.sin.sin_addr); | |
927 | ||
928 | /* Catch self originated messages and match them against our | |
929 | * current RIB. | |
930 | * At the same time, ignore unconfirmed messages, they should be | |
931 | * tracked | |
932 | * by rtm_write() and kernel_rtm_ipv4(). | |
933 | */ | |
934 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) { | |
935 | char buf[PREFIX_STRLEN], gate_buf[INET_ADDRSTRLEN]; | |
936 | int ret; | |
937 | if (!IS_ZEBRA_DEBUG_RIB) | |
938 | return; | |
939 | ret = rib_lookup_ipv4_route((struct prefix_ipv4 *)&p, | |
940 | &gate, VRF_DEFAULT); | |
941 | prefix2str(&p, buf, sizeof(buf)); | |
942 | switch (rtm->rtm_type) { | |
943 | case RTM_ADD: | |
944 | case RTM_GET: | |
945 | case RTM_CHANGE: | |
946 | /* The kernel notifies us about a new route in | |
947 | FIB created by us. | |
948 | Do we have a correspondent entry in our RIB? | |
949 | */ | |
950 | switch (ret) { | |
951 | case ZEBRA_RIB_NOTFOUND: | |
952 | zlog_debug( | |
953 | "%s: %s %s: desync: RR isn't yet in RIB, while already in FIB", | |
954 | __func__, | |
955 | lookup_msg(rtm_type_str, | |
956 | rtm->rtm_type, NULL), | |
957 | buf); | |
958 | break; | |
959 | case ZEBRA_RIB_FOUND_CONNECTED: | |
960 | case ZEBRA_RIB_FOUND_NOGATE: | |
961 | inet_ntop(AF_INET, &gate.sin.sin_addr, | |
962 | gate_buf, INET_ADDRSTRLEN); | |
963 | zlog_debug( | |
964 | "%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)", | |
965 | __func__, | |
966 | lookup_msg(rtm_type_str, | |
967 | rtm->rtm_type, NULL), | |
968 | buf, gate_buf); | |
969 | break; | |
970 | case ZEBRA_RIB_FOUND_EXACT: /* RIB RR == FIB RR | |
9d303b37 | 971 | */ |
d62a17ae | 972 | zlog_debug( |
973 | "%s: %s %s: done Ok", __func__, | |
974 | lookup_msg(rtm_type_str, | |
975 | rtm->rtm_type, NULL), | |
976 | buf); | |
977 | rib_lookup_and_dump( | |
978 | (struct prefix_ipv4 *)&p, | |
979 | VRF_DEFAULT); | |
980 | return; | |
981 | break; | |
982 | } | |
983 | break; | |
984 | case RTM_DELETE: | |
985 | /* The kernel notifies us about a route deleted | |
986 | by us. Do we still | |
987 | have it in the RIB? Do we have anything | |
988 | instead? */ | |
989 | switch (ret) { | |
990 | case ZEBRA_RIB_FOUND_EXACT: | |
991 | zlog_debug( | |
992 | "%s: %s %s: desync: RR is still in RIB, while already not in FIB", | |
993 | __func__, | |
994 | lookup_msg(rtm_type_str, | |
995 | rtm->rtm_type, NULL), | |
996 | buf); | |
997 | rib_lookup_and_dump( | |
998 | (struct prefix_ipv4 *)&p, | |
999 | VRF_DEFAULT); | |
1000 | break; | |
1001 | case ZEBRA_RIB_FOUND_CONNECTED: | |
1002 | case ZEBRA_RIB_FOUND_NOGATE: | |
1003 | zlog_debug( | |
1004 | "%s: %s %s: desync: RR is still in RIB, plus gate differs", | |
1005 | __func__, | |
1006 | lookup_msg(rtm_type_str, | |
1007 | rtm->rtm_type, NULL), | |
1008 | buf); | |
1009 | rib_lookup_and_dump( | |
1010 | (struct prefix_ipv4 *)&p, | |
1011 | VRF_DEFAULT); | |
1012 | break; | |
1013 | case ZEBRA_RIB_NOTFOUND: /* RIB RR == FIB RR */ | |
1014 | zlog_debug( | |
1015 | "%s: %s %s: done Ok", __func__, | |
1016 | lookup_msg(rtm_type_str, | |
1017 | rtm->rtm_type, NULL), | |
1018 | buf); | |
1019 | rib_lookup_and_dump( | |
1020 | (struct prefix_ipv4 *)&p, | |
1021 | VRF_DEFAULT); | |
1022 | return; | |
1023 | break; | |
1024 | } | |
1025 | break; | |
1026 | default: | |
1027 | zlog_debug( | |
1028 | "%s: %s: warning: loopback RTM of type %s received", | |
1029 | __func__, buf, | |
1030 | lookup_msg(rtm_type_str, rtm->rtm_type, | |
1031 | NULL)); | |
1032 | } | |
1033 | return; | |
1034 | } | |
1035 | ||
1036 | /* Change, delete the old prefix, we have no further information | |
1037 | * to specify the route really | |
1038 | */ | |
1039 | if (rtm->rtm_type == RTM_CHANGE) | |
1040 | rib_delete(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, | |
60466a63 | 1041 | ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, |
5dfeba19 | 1042 | NULL, 0, 0, true); |
fd36be7e | 1043 | |
a8309422 DL |
1044 | if (!nh.type) { |
1045 | nh.type = NEXTHOP_TYPE_IPV4; | |
1046 | nh.gate.ipv4 = gate.sin.sin_addr; | |
1047 | } | |
d62a17ae | 1048 | |
d62a17ae | 1049 | if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD |
1050 | || rtm->rtm_type == RTM_CHANGE) | |
1051 | rib_add(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, | |
1052 | ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, | |
fd36be7e | 1053 | &nh, 0, 0, 0, 0); |
d62a17ae | 1054 | else |
1055 | rib_delete(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, | |
1056 | ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, | |
5dfeba19 | 1057 | &nh, 0, 0, true); |
d62a17ae | 1058 | } |
1059 | if (dest.sa.sa_family == AF_INET6) { | |
1060 | /* One day we might have a debug section here like one in the | |
1061 | * IPv4 case above. Just ignore own messages at the moment. | |
1062 | */ | |
1063 | if (rtm->rtm_type != RTM_GET && rtm->rtm_pid == pid) | |
1064 | return; | |
1065 | struct prefix p; | |
1066 | ifindex_t ifindex = 0; | |
1067 | ||
1068 | p.family = AF_INET6; | |
1069 | p.u.prefix6 = dest.sin6.sin6_addr; | |
1070 | if (flags & RTF_HOST) | |
1071 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1072 | else | |
1073 | p.prefixlen = ip6_masklen(mask.sin6.sin6_addr); | |
718e3744 | 1074 | |
1075 | #ifdef KAME | |
d62a17ae | 1076 | if (IN6_IS_ADDR_LINKLOCAL(&gate.sin6.sin6_addr)) { |
1077 | ifindex = IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr); | |
1078 | SET_IN6_LINKLOCAL_IFINDEX(gate.sin6.sin6_addr, 0); | |
1079 | } | |
718e3744 | 1080 | #endif /* KAME */ |
1081 | ||
d62a17ae | 1082 | /* CHANGE: delete the old prefix, we have no further information |
1083 | * to specify the route really | |
1084 | */ | |
1085 | if (rtm->rtm_type == RTM_CHANGE) | |
1086 | rib_delete(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, | |
60466a63 | 1087 | ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, |
5dfeba19 | 1088 | NULL, 0, 0, true); |
fd36be7e | 1089 | |
a8309422 DL |
1090 | if (!nh.type) { |
1091 | nh.type = ifindex ? NEXTHOP_TYPE_IPV6_IFINDEX | |
1092 | : NEXTHOP_TYPE_IPV6; | |
1093 | nh.gate.ipv6 = gate.sin6.sin6_addr; | |
1094 | nh.ifindex = ifindex; | |
1095 | } | |
d62a17ae | 1096 | |
d62a17ae | 1097 | if (rtm->rtm_type == RTM_GET || rtm->rtm_type == RTM_ADD |
1098 | || rtm->rtm_type == RTM_CHANGE) | |
1099 | rib_add(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, | |
1100 | ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, | |
fd36be7e | 1101 | &nh, 0, 0, 0, 0); |
d62a17ae | 1102 | else |
1103 | rib_delete(AFI_IP6, SAFI_UNICAST, VRF_DEFAULT, | |
1104 | ZEBRA_ROUTE_KERNEL, 0, zebra_flags, &p, NULL, | |
5dfeba19 | 1105 | &nh, 0, 0, true); |
d62a17ae | 1106 | } |
718e3744 | 1107 | } |
1108 | ||
1109 | /* Interface function for the kernel routing table updates. Support | |
6621ca86 | 1110 | * for RTM_CHANGE will be needed. |
1111 | * Exported only for rt_socket.c | |
1112 | */ | |
d62a17ae | 1113 | int rtm_write(int message, union sockunion *dest, union sockunion *mask, |
1114 | union sockunion *gate, union sockunion *mpls, unsigned int index, | |
a8309422 | 1115 | enum blackhole_type bh_type, int metric) |
718e3744 | 1116 | { |
d62a17ae | 1117 | int ret; |
1118 | caddr_t pnt; | |
1119 | struct interface *ifp; | |
1120 | ||
1121 | /* Sequencial number of routing message. */ | |
1122 | static int msg_seq = 0; | |
1123 | ||
1124 | /* Struct of rt_msghdr and buffer for storing socket's data. */ | |
1125 | struct { | |
1126 | struct rt_msghdr rtm; | |
1127 | char buf[512]; | |
1128 | } msg; | |
1129 | ||
1130 | if (routing_sock < 0) | |
1131 | return ZEBRA_ERR_EPERM; | |
1132 | ||
1133 | /* Clear and set rt_msghdr values */ | |
1134 | memset(&msg, 0, sizeof(struct rt_msghdr)); | |
1135 | msg.rtm.rtm_version = RTM_VERSION; | |
1136 | msg.rtm.rtm_type = message; | |
1137 | msg.rtm.rtm_seq = msg_seq++; | |
1138 | msg.rtm.rtm_addrs = RTA_DST; | |
1139 | msg.rtm.rtm_addrs |= RTA_GATEWAY; | |
1140 | msg.rtm.rtm_flags = RTF_UP; | |
fe6c7157 | 1141 | #ifdef __OpenBSD__ |
d62a17ae | 1142 | msg.rtm.rtm_flags |= RTF_MPATH; |
1143 | msg.rtm.rtm_fmask = RTF_MPLS; | |
d3e2c74a | 1144 | #endif |
d62a17ae | 1145 | msg.rtm.rtm_index = index; |
718e3744 | 1146 | |
d62a17ae | 1147 | if (metric != 0) { |
1148 | msg.rtm.rtm_rmx.rmx_hopcount = metric; | |
1149 | msg.rtm.rtm_inits |= RTV_HOPCOUNT; | |
1150 | } | |
718e3744 | 1151 | |
d62a17ae | 1152 | ifp = if_lookup_by_index(index, VRF_DEFAULT); |
718e3744 | 1153 | |
d62a17ae | 1154 | if (gate && (message == RTM_ADD || message == RTM_CHANGE)) |
1155 | msg.rtm.rtm_flags |= RTF_GATEWAY; | |
718e3744 | 1156 | |
d62a17ae | 1157 | /* When RTF_CLONING is unavailable on BSD, should we set some |
1158 | * other flag instead? | |
1159 | */ | |
e6f148e6 | 1160 | #ifdef RTF_CLONING |
d62a17ae | 1161 | if (!gate && (message == RTM_ADD || message == RTM_CHANGE) && ifp |
1162 | && (ifp->flags & IFF_POINTOPOINT) == 0) | |
1163 | msg.rtm.rtm_flags |= RTF_CLONING; | |
e6f148e6 | 1164 | #endif /* RTF_CLONING */ |
718e3744 | 1165 | |
d62a17ae | 1166 | /* If no protocol specific gateway is specified, use link |
1167 | address for gateway. */ | |
1168 | if (!gate) { | |
1169 | if (!ifp) { | |
1170 | char dest_buf[INET_ADDRSTRLEN] = "NULL", | |
1171 | mask_buf[INET_ADDRSTRLEN] = "255.255.255.255"; | |
1172 | if (dest) | |
1173 | inet_ntop(AF_INET, &dest->sin.sin_addr, | |
1174 | dest_buf, INET_ADDRSTRLEN); | |
1175 | if (mask) | |
1176 | inet_ntop(AF_INET, &mask->sin.sin_addr, | |
1177 | mask_buf, INET_ADDRSTRLEN); | |
1178 | zlog_warn( | |
1179 | "%s: %s/%s: gate == NULL and no gateway found for ifindex %d", | |
1180 | __func__, dest_buf, mask_buf, index); | |
1181 | return -1; | |
1182 | } | |
1183 | gate = (union sockunion *)&((struct zebra_if *)ifp->info)->sdl; | |
1184 | } | |
1185 | ||
1186 | if (mask) | |
1187 | msg.rtm.rtm_addrs |= RTA_NETMASK; | |
1188 | else if (message == RTM_ADD || message == RTM_CHANGE) | |
1189 | msg.rtm.rtm_flags |= RTF_HOST; | |
718e3744 | 1190 | |
fe6c7157 | 1191 | #ifdef __OpenBSD__ |
d62a17ae | 1192 | if (mpls) { |
1193 | msg.rtm.rtm_addrs |= RTA_SRC; | |
1194 | msg.rtm.rtm_flags |= RTF_MPLS; | |
1195 | ||
1196 | if (mpls->smpls.smpls_label | |
1197 | != htonl(MPLS_IMP_NULL_LABEL << MPLS_LABEL_OFFSET)) | |
1198 | msg.rtm.rtm_mpls = MPLS_OP_PUSH; | |
1199 | } | |
d3e2c74a RW |
1200 | #endif |
1201 | ||
d62a17ae | 1202 | /* Tagging route with flags */ |
1203 | msg.rtm.rtm_flags |= (RTF_PROTO1); | |
718e3744 | 1204 | |
a8309422 DL |
1205 | switch (bh_type) { |
1206 | case BLACKHOLE_UNSPEC: | |
1207 | break; | |
1208 | case BLACKHOLE_REJECT: | |
d62a17ae | 1209 | msg.rtm.rtm_flags |= RTF_REJECT; |
a8309422 DL |
1210 | break; |
1211 | default: | |
1212 | msg.rtm.rtm_flags |= RTF_BLACKHOLE; | |
1213 | break; | |
1214 | } | |
81dfcaa2 | 1215 | |
718e3744 | 1216 | |
d62a17ae | 1217 | #define SOCKADDRSET(X, R) \ |
1218 | if (msg.rtm.rtm_addrs & (R)) { \ | |
1219 | int len = SAROUNDUP(X); \ | |
1220 | memcpy(pnt, (caddr_t)(X), len); \ | |
1221 | pnt += len; \ | |
1222 | } | |
718e3744 | 1223 | |
d62a17ae | 1224 | pnt = (caddr_t)msg.buf; |
718e3744 | 1225 | |
d62a17ae | 1226 | /* Write each socket data into rtm message buffer */ |
1227 | SOCKADDRSET(dest, RTA_DST); | |
1228 | SOCKADDRSET(gate, RTA_GATEWAY); | |
1229 | SOCKADDRSET(mask, RTA_NETMASK); | |
fe6c7157 | 1230 | #ifdef __OpenBSD__ |
d62a17ae | 1231 | SOCKADDRSET(mpls, RTA_SRC); |
d3e2c74a | 1232 | #endif |
718e3744 | 1233 | |
d62a17ae | 1234 | msg.rtm.rtm_msglen = pnt - (caddr_t)&msg; |
1235 | ||
1236 | ret = write(routing_sock, &msg, msg.rtm.rtm_msglen); | |
1237 | ||
1238 | if (ret != msg.rtm.rtm_msglen) { | |
1239 | if (errno == EEXIST) | |
1240 | return ZEBRA_ERR_RTEXIST; | |
1241 | if (errno == ENETUNREACH) | |
1242 | return ZEBRA_ERR_RTUNREACH; | |
1243 | if (errno == ESRCH) | |
1244 | return ZEBRA_ERR_RTNOEXIST; | |
1245 | ||
1246 | zlog_warn("%s: write : %s (%d)", __func__, safe_strerror(errno), | |
1247 | errno); | |
1248 | return ZEBRA_ERR_KERNEL; | |
1249 | } | |
1250 | return ZEBRA_ERR_NOERROR; | |
718e3744 | 1251 | } |
1252 | ||
6b0655a2 | 1253 | |
718e3744 | 1254 | #include "thread.h" |
1255 | #include "zebra/zserv.h" | |
1256 | ||
718e3744 | 1257 | /* For debug purpose. */ |
d62a17ae | 1258 | static void rtmsg_debug(struct rt_msghdr *rtm) |
718e3744 | 1259 | { |
d62a17ae | 1260 | zlog_debug("Kernel: Len: %d Type: %s", rtm->rtm_msglen, |
1261 | lookup_msg(rtm_type_str, rtm->rtm_type, NULL)); | |
1262 | rtm_flag_dump(rtm->rtm_flags); | |
1263 | zlog_debug("Kernel: message seq %d", rtm->rtm_seq); | |
1264 | zlog_debug("Kernel: pid %lld, rtm_addrs 0x%x", (long long)rtm->rtm_pid, | |
1265 | rtm->rtm_addrs); | |
718e3744 | 1266 | } |
1267 | ||
1268 | /* This is pretty gross, better suggestions welcome -- mhandler */ | |
1269 | #ifndef RTAX_MAX | |
1270 | #ifdef RTA_NUMBITS | |
1271 | #define RTAX_MAX RTA_NUMBITS | |
1272 | #else | |
1273 | #define RTAX_MAX 8 | |
1274 | #endif /* RTA_NUMBITS */ | |
1275 | #endif /* RTAX_MAX */ | |
1276 | ||
1277 | /* Kernel routing table and interface updates via routing socket. */ | |
d62a17ae | 1278 | static int kernel_read(struct thread *thread) |
718e3744 | 1279 | { |
d62a17ae | 1280 | int sock; |
1281 | int nbytes; | |
1282 | struct rt_msghdr *rtm; | |
1283 | ||
1284 | /* | |
1285 | * This must be big enough for any message the kernel might send. | |
1286 | * Rather than determining how many sockaddrs of what size might be | |
1287 | * in each particular message, just use RTAX_MAX of sockaddr_storage | |
1288 | * for each. Note that the sockaddrs must be after each message | |
1289 | * definition, or rather after whichever happens to be the largest, | |
1290 | * since the buffer needs to be big enough for a message and the | |
1291 | * sockaddrs together. | |
1292 | */ | |
1293 | union { | |
1294 | /* Routing information. */ | |
1295 | struct { | |
1296 | struct rt_msghdr rtm; | |
1297 | struct sockaddr_storage addr[RTAX_MAX]; | |
1298 | } r; | |
1299 | ||
1300 | /* Interface information. */ | |
1301 | struct { | |
1302 | struct if_msghdr ifm; | |
1303 | struct sockaddr_storage addr[RTAX_MAX]; | |
1304 | } im; | |
1305 | ||
1306 | /* Interface address information. */ | |
1307 | struct { | |
1308 | struct ifa_msghdr ifa; | |
1309 | struct sockaddr_storage addr[RTAX_MAX]; | |
1310 | } ia; | |
718e3744 | 1311 | |
1312 | #ifdef RTM_IFANNOUNCE | |
d62a17ae | 1313 | /* Interface arrival/departure */ |
1314 | struct { | |
1315 | struct if_announcemsghdr ifan; | |
1316 | struct sockaddr_storage addr[RTAX_MAX]; | |
1317 | } ian; | |
718e3744 | 1318 | #endif /* RTM_IFANNOUNCE */ |
1319 | ||
d62a17ae | 1320 | } buf; |
718e3744 | 1321 | |
d62a17ae | 1322 | /* Fetch routing socket. */ |
1323 | sock = THREAD_FD(thread); | |
718e3744 | 1324 | |
d62a17ae | 1325 | nbytes = read(sock, &buf, sizeof buf); |
718e3744 | 1326 | |
d62a17ae | 1327 | if (nbytes <= 0) { |
1328 | if (nbytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN) | |
1329 | zlog_warn("routing socket error: %s", | |
1330 | safe_strerror(errno)); | |
1331 | return 0; | |
1332 | } | |
718e3744 | 1333 | |
d62a17ae | 1334 | thread_add_read(zebrad.master, kernel_read, NULL, sock, NULL); |
718e3744 | 1335 | |
d62a17ae | 1336 | if (IS_ZEBRA_DEBUG_KERNEL) |
1337 | rtmsg_debug(&buf.r.rtm); | |
718e3744 | 1338 | |
d62a17ae | 1339 | rtm = &buf.r.rtm; |
718e3744 | 1340 | |
d62a17ae | 1341 | /* |
1342 | * Ensure that we didn't drop any data, so that processing routines | |
1343 | * can assume they have the whole message. | |
1344 | */ | |
1345 | if (rtm->rtm_msglen != nbytes) { | |
1346 | zlog_warn( | |
1347 | "kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n", | |
1348 | rtm->rtm_msglen, nbytes, rtm->rtm_type); | |
1349 | return -1; | |
1350 | } | |
1351 | ||
1352 | switch (rtm->rtm_type) { | |
1353 | case RTM_ADD: | |
1354 | case RTM_DELETE: | |
1355 | case RTM_CHANGE: | |
1356 | rtm_read(rtm); | |
1357 | break; | |
1358 | case RTM_IFINFO: | |
1359 | ifm_read(&buf.im.ifm); | |
1360 | break; | |
1361 | case RTM_NEWADDR: | |
1362 | case RTM_DELADDR: | |
1363 | ifam_read(&buf.ia.ifa); | |
1364 | break; | |
718e3744 | 1365 | #ifdef RTM_IFANNOUNCE |
d62a17ae | 1366 | case RTM_IFANNOUNCE: |
1367 | ifan_read(&buf.ian.ifan); | |
1368 | break; | |
718e3744 | 1369 | #endif /* RTM_IFANNOUNCE */ |
d62a17ae | 1370 | default: |
1371 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1372 | zlog_debug("Unprocessed RTM_type: %d", rtm->rtm_type); | |
1373 | break; | |
1374 | } | |
1375 | return 0; | |
718e3744 | 1376 | } |
1377 | ||
1378 | /* Make routing socket. */ | |
d62a17ae | 1379 | static void routing_socket(struct zebra_ns *zns) |
718e3744 | 1380 | { |
d62a17ae | 1381 | if (zserv_privs.change(ZPRIVS_RAISE)) |
1382 | zlog_err("routing_socket: Can't raise privileges"); | |
1383 | ||
1384 | routing_sock = socket(AF_ROUTE, SOCK_RAW, 0); | |
1385 | ||
1386 | if (routing_sock < 0) { | |
1387 | if (zserv_privs.change(ZPRIVS_LOWER)) | |
1388 | zlog_err("routing_socket: Can't lower privileges"); | |
1389 | zlog_warn("Can't init kernel routing socket"); | |
1390 | return; | |
1391 | } | |
1392 | ||
1393 | /* XXX: Socket should be NONBLOCK, however as we currently | |
1394 | * discard failed writes, this will lead to inconsistencies. | |
1395 | * For now, socket must be blocking. | |
1396 | */ | |
1397 | /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0) | |
1398 | zlog_warn ("Can't set O_NONBLOCK to routing socket");*/ | |
1399 | ||
1400 | if (zserv_privs.change(ZPRIVS_LOWER)) | |
1401 | zlog_err("routing_socket: Can't lower privileges"); | |
1402 | ||
1403 | /* kernel_read needs rewrite. */ | |
1404 | thread_add_read(zebrad.master, kernel_read, NULL, routing_sock, NULL); | |
718e3744 | 1405 | } |
1406 | ||
1407 | /* Exported interface function. This function simply calls | |
1408 | routing_socket (). */ | |
d62a17ae | 1409 | void kernel_init(struct zebra_ns *zns) |
8f7d9fc0 | 1410 | { |
d62a17ae | 1411 | routing_socket(zns); |
8f7d9fc0 FL |
1412 | } |
1413 | ||
d62a17ae | 1414 | void kernel_terminate(struct zebra_ns *zns) |
718e3744 | 1415 | { |
d62a17ae | 1416 | return; |
718e3744 | 1417 | } |
ddfeb486 DL |
1418 | |
1419 | #endif /* !HAVE_NETLINK */ |