1 /* Kernel communication using routing socket.
2 * Copyright (C) 1999 Kunihiro Ishiguro
4 * This file is part of GNU Zebra.
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
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.
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
25 #include <net/if_types.h>
27 #include <netmpls/mpls.h>
32 #include "sockunion.h"
33 #include "connected.h"
35 #include "zebra_memory.h"
42 #include "lib_errors.h"
45 #include "zebra/interface.h"
46 #include "zebra/zserv.h"
47 #include "zebra/debug.h"
48 #include "zebra/kernel_socket.h"
49 #include "zebra/rib.h"
50 #include "zebra/zebra_errors.h"
51 #include "zebra/zebra_ptm.h"
53 extern struct zebra_privs_t zserv_privs
;
56 * Historically, the BSD routing socket has aligned data following a
57 * struct sockaddr to sizeof(long), which was 4 bytes on some
58 * platforms, and 8 bytes on others. NetBSD 6 changed the routing
59 * socket to align to sizeof(uint64_t), which is 8 bytes. OS X
60 * appears to align to sizeof(int), which is 4 bytes.
62 * Alignment of zero-sized sockaddrs is nonsensical, but historically
63 * BSD defines RT_ROUNDUP(0) to be the alignment interval (rather than
64 * 0). We follow this practice without questioning it, but it is a
65 * bug if quagga calls ROUNDUP with 0.
69 * Because of these varying conventions, the only sane approach is for
70 * the <net/route.h> header to define some flavor of ROUNDUP macro.
74 /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */
75 #define SAROUNDUP(a) SA_SIZE(a)
78 #if defined(RT_ROUNDUP)
79 #define ROUNDUP(a) RT_ROUNDUP(a)
80 #endif /* defined(RT_ROUNDUP) */
83 /* Solaris has struct sockaddr_in[6] definitions at 16 / 32 bytes size,
84 * so the whole concept doesn't really apply. */
85 #define ROUNDUP(a) (a)
89 * If ROUNDUP has not yet been defined in terms of platform-provided
90 * defines, attempt to cope with heuristics.
95 * If you're porting to a platform that changed RT_ROUNDUP but doesn't
96 * have it in its headers, this will break rather obviously and you'll
97 * have to fix it here.
100 /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */
102 #define ROUNDUP_TYPE int
104 #define ROUNDUP_TYPE long
108 ((a) > 0 ? (1 + (((a)-1) | (sizeof(ROUNDUP_TYPE) - 1))) \
109 : sizeof(ROUNDUP_TYPE))
111 #endif /* defined(ROUNDUP) */
114 * Given a pointer (sockaddr or void *), return the number of bytes
115 * taken up by the sockaddr and any padding needed for alignment.
117 #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
118 #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len)
121 * One would hope all fixed-size structure definitions are aligned,
122 * but round them up nonetheless.
124 #define SAROUNDUP(X) \
125 (((struct sockaddr *)(X))->sa_family == AF_INET \
126 ? ROUNDUP(sizeof(struct sockaddr_in)) \
127 : (((struct sockaddr *)(X))->sa_family == AF_INET6 \
128 ? ROUNDUP(sizeof(struct sockaddr_in6)) \
129 : (((struct sockaddr *)(X))->sa_family == AF_LINK \
130 ? ROUNDUP(sizeof(struct sockaddr_dl)) \
131 : sizeof(struct sockaddr))))
132 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
134 #endif /* !SA_SIZE */
137 * We use a call to an inline function to copy (PNT) to (DEST)
138 * 1. Calculating the length of the copy requires an #ifdef to determine
139 * if sa_len is a field and can't be used directly inside a #define
140 * 2. So the compiler doesn't complain when DEST is NULL, which is only true
141 * when we are skipping the copy and incrementing to the next SA
143 static inline void rta_copy(union sockunion
*dest
, caddr_t src
)
148 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
149 len
= (((struct sockaddr
*)src
)->sa_len
> sizeof(*dest
))
151 : ((struct sockaddr
*)src
)->sa_len
;
153 len
= (SAROUNDUP(src
) > sizeof(*dest
)) ? sizeof(*dest
) : SAROUNDUP(src
);
155 memcpy(dest
, src
, len
);
158 #define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \
159 if ((RTMADDRS) & (RTA)) { \
160 int len = SAROUNDUP((PNT)); \
161 if (af_check(((struct sockaddr *)(PNT))->sa_family)) \
162 rta_copy((DEST), (PNT)); \
165 #define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \
166 if ((RTMADDRS) & (RTA)) { \
167 int len = SAROUNDUP((PNT)); \
168 rta_copy((DEST), (PNT)); \
172 #define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \
173 if ((RTMADDRS) & (RTA)) { \
174 uint8_t *pdest = (uint8_t *)(DEST); \
175 int len = SAROUNDUP((PNT)); \
176 struct sockaddr_dl *sdl = (struct sockaddr_dl *)(PNT); \
177 if (IS_ZEBRA_DEBUG_KERNEL) \
178 zlog_debug("%s: RTA_SDL_GET nlen %d, alen %d", \
179 __func__, sdl->sdl_nlen, sdl->sdl_alen); \
180 if (((DEST) != NULL) && (sdl->sdl_family == AF_LINK) \
181 && (sdl->sdl_nlen < IFNAMSIZ) && (sdl->sdl_nlen <= len)) { \
182 memcpy(pdest, sdl->sdl_data, sdl->sdl_nlen); \
183 pdest[sdl->sdl_nlen] = '\0'; \
184 (LEN) = sdl->sdl_nlen; \
190 /* Routing socket message types. */
191 const struct message rtm_type_str
[] = {{RTM_ADD
, "RTM_ADD"},
192 {RTM_DELETE
, "RTM_DELETE"},
193 {RTM_CHANGE
, "RTM_CHANGE"},
194 {RTM_GET
, "RTM_GET"},
195 {RTM_LOSING
, "RTM_LOSING"},
196 {RTM_REDIRECT
, "RTM_REDIRECT"},
197 {RTM_MISS
, "RTM_MISS"},
198 {RTM_LOCK
, "RTM_LOCK"},
200 {RTM_OLDADD
, "RTM_OLDADD"},
201 #endif /* RTM_OLDADD */
203 {RTM_OLDDEL
, "RTM_OLDDEL"},
204 #endif /* RTM_OLDDEL */
205 {RTM_RESOLVE
, "RTM_RESOLVE"},
206 {RTM_NEWADDR
, "RTM_NEWADDR"},
207 {RTM_DELADDR
, "RTM_DELADDR"},
208 {RTM_IFINFO
, "RTM_IFINFO"},
210 {RTM_OIFINFO
, "RTM_OIFINFO"},
211 #endif /* RTM_OIFINFO */
213 {RTM_NEWMADDR
, "RTM_NEWMADDR"},
214 #endif /* RTM_NEWMADDR */
216 {RTM_DELMADDR
, "RTM_DELMADDR"},
217 #endif /* RTM_DELMADDR */
218 #ifdef RTM_IFANNOUNCE
219 {RTM_IFANNOUNCE
, "RTM_IFANNOUNCE"},
220 #endif /* RTM_IFANNOUNCE */
223 static const struct message rtm_flag_str
[] = {{RTF_UP
, "UP"},
224 {RTF_GATEWAY
, "GATEWAY"},
226 {RTF_REJECT
, "REJECT"},
227 {RTF_DYNAMIC
, "DYNAMIC"},
228 {RTF_MODIFIED
, "MODIFIED"},
232 #endif /* RTF_MASK */
234 {RTF_CLONING
, "CLONING"},
235 #endif /* RTF_CLONING */
237 {RTF_XRESOLVE
, "XRESOLVE"},
238 #endif /* RTF_XRESOLVE */
240 {RTF_LLINFO
, "LLINFO"},
241 #endif /* RTF_LLINFO */
242 {RTF_STATIC
, "STATIC"},
243 {RTF_BLACKHOLE
, "BLACKHOLE"},
245 {RTF_PRIVATE
, "PRIVATE"},
246 #endif /* RTF_PRIVATE */
247 {RTF_PROTO1
, "PROTO1"},
248 {RTF_PROTO2
, "PROTO2"},
250 {RTF_PRCLONING
, "PRCLONING"},
251 #endif /* RTF_PRCLONING */
253 {RTF_WASCLONED
, "WASCLONED"},
254 #endif /* RTF_WASCLONED */
256 {RTF_PROTO3
, "PROTO3"},
257 #endif /* RTF_PROTO3 */
259 {RTF_PINNED
, "PINNED"},
260 #endif /* RTF_PINNED */
262 {RTF_LOCAL
, "LOCAL"},
263 #endif /* RTF_LOCAL */
265 {RTF_BROADCAST
, "BROADCAST"},
266 #endif /* RTF_BROADCAST */
268 {RTF_MULTICAST
, "MULTICAST"},
269 #endif /* RTF_MULTICAST */
271 {RTF_MULTIRT
, "MULTIRT"},
272 #endif /* RTF_MULTIRT */
274 {RTF_SETSRC
, "SETSRC"},
275 #endif /* RTF_SETSRC */
278 /* Kernel routing update socket. */
279 int routing_sock
= -1;
281 /* Kernel dataplane routing update socket, used in the dataplane pthread
284 int dplane_routing_sock
= -1;
286 /* Yes I'm checking ugly routing socket behavior. */
289 /* Supported address family check. */
290 static inline int af_check(int family
)
292 if (family
== AF_INET
)
294 if (family
== AF_INET6
)
299 /* Dump routing table flag for debug purpose. */
300 static void rtm_flag_dump(int flag
)
302 const struct message
*mes
;
303 static char buf
[BUFSIZ
];
306 for (mes
= rtm_flag_str
; mes
->key
!= 0; mes
++) {
307 if (mes
->key
& flag
) {
308 strlcat(buf
, mes
->str
, BUFSIZ
);
309 strlcat(buf
, " ", BUFSIZ
);
312 zlog_debug("Kernel: %s", buf
);
315 #ifdef RTM_IFANNOUNCE
316 /* Interface adding function */
317 static int ifan_read(struct if_announcemsghdr
*ifan
)
319 struct interface
*ifp
;
321 ifp
= if_lookup_by_index(ifan
->ifan_index
, VRF_DEFAULT
);
324 assert((ifp
->ifindex
== ifan
->ifan_index
)
325 || (ifp
->ifindex
== IFINDEX_INTERNAL
));
327 if ((ifp
== NULL
) || ((ifp
->ifindex
== IFINDEX_INTERNAL
)
328 && (ifan
->ifan_what
== IFAN_ARRIVAL
))) {
329 if (IS_ZEBRA_DEBUG_KERNEL
)
331 "%s: creating interface for ifindex %d, name %s",
332 __func__
, ifan
->ifan_index
, ifan
->ifan_name
);
334 /* Create Interface */
335 ifp
= if_get_by_name(ifan
->ifan_name
, VRF_DEFAULT
);
336 if_set_index(ifp
, ifan
->ifan_index
);
340 } else if (ifp
!= NULL
&& ifan
->ifan_what
== IFAN_DEPARTURE
)
341 if_delete_update(ifp
);
347 if (IS_ZEBRA_DEBUG_KERNEL
)
348 zlog_debug("%s: interface %s index %d", __func__
,
349 ifan
->ifan_name
, ifan
->ifan_index
);
353 #endif /* RTM_IFANNOUNCE */
355 #ifdef HAVE_BSD_IFI_LINK_STATE
356 /* BSD link detect translation */
357 static void bsd_linkdetect_translate(struct if_msghdr
*ifm
)
359 if ((ifm
->ifm_data
.ifi_link_state
>= LINK_STATE_UP
)
360 || (ifm
->ifm_data
.ifi_link_state
== LINK_STATE_UNKNOWN
))
361 SET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
363 UNSET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
365 #endif /* HAVE_BSD_IFI_LINK_STATE */
367 static enum zebra_link_type
sdl_to_zebra_link_type(unsigned int sdlt
)
371 return ZEBRA_LLT_ETHER
;
373 return ZEBRA_LLT_X25
;
375 return ZEBRA_LLT_FDDI
;
377 return ZEBRA_LLT_PPP
;
379 return ZEBRA_LLT_LOOPBACK
;
381 return ZEBRA_LLT_SLIP
;
383 return ZEBRA_LLT_ARCNET
;
385 return ZEBRA_LLT_ATM
;
387 return ZEBRA_LLT_LOCALTLK
;
389 return ZEBRA_LLT_HIPPI
;
392 return ZEBRA_LLT_IEEE1394
;
396 return ZEBRA_LLT_UNKNOWN
;
401 * Handle struct if_msghdr obtained from reading routing socket or
402 * sysctl (from interface_list). There may or may not be sockaddrs
403 * present after the header.
405 int ifm_read(struct if_msghdr
*ifm
)
407 struct interface
*ifp
= NULL
;
408 struct sockaddr_dl
*sdl
;
409 char ifname
[IFNAMSIZ
];
413 /* terminate ifname at head (for strnlen) and tail (for safety) */
414 ifname
[IFNAMSIZ
- 1] = '\0';
416 /* paranoia: sanity check structure */
417 if (ifm
->ifm_msglen
< sizeof(struct if_msghdr
)) {
418 flog_err(EC_ZEBRA_NETLINK_LENGTH_ERROR
,
419 "ifm_read: ifm->ifm_msglen %d too short\n",
425 * Check for a sockaddr_dl following the message. First, point to
426 * where a socakddr might be if one follows the message.
428 cp
= (void *)(ifm
+ 1);
432 * XXX This behavior should be narrowed to only the kernel versions
433 * for which the structures returned do not match the headers.
435 * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions
436 * is 12 bytes larger than the 32 bit version.
438 if (((struct sockaddr
*)cp
)->sa_family
== AF_UNSPEC
)
442 RTA_ADDR_GET(NULL
, RTA_DST
, ifm
->ifm_addrs
, cp
);
443 RTA_ADDR_GET(NULL
, RTA_GATEWAY
, ifm
->ifm_addrs
, cp
);
444 RTA_ATTR_GET(NULL
, RTA_NETMASK
, ifm
->ifm_addrs
, cp
);
445 RTA_ADDR_GET(NULL
, RTA_GENMASK
, ifm
->ifm_addrs
, cp
);
446 sdl
= (struct sockaddr_dl
*)cp
;
447 RTA_NAME_GET(ifname
, RTA_IFP
, ifm
->ifm_addrs
, cp
, ifnlen
);
448 RTA_ADDR_GET(NULL
, RTA_IFA
, ifm
->ifm_addrs
, cp
);
449 RTA_ADDR_GET(NULL
, RTA_AUTHOR
, ifm
->ifm_addrs
, cp
);
450 RTA_ADDR_GET(NULL
, RTA_BRD
, ifm
->ifm_addrs
, cp
);
452 RTA_ATTR_GET(NULL
, RTA_LABEL
, ifm
->ifm_addrs
, cp
);
455 RTA_ADDR_GET(NULL
, RTA_SRC
, ifm
->ifm_addrs
, cp
);
458 if (IS_ZEBRA_DEBUG_KERNEL
)
459 zlog_debug("%s: sdl ifname %s", __func__
,
460 (ifnlen
? ifname
: "(nil)"));
463 * Look up on ifindex first, because ifindices are the primary handle
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
469 if ((ifp
= if_lookup_by_index(ifm
->ifm_index
, VRF_DEFAULT
)) != NULL
) {
470 /* we have an ifp, verify that the name matches as some systems,
471 * eg Solaris, have a 1:many association of ifindex:ifname
472 * if they dont match, we dont have the correct ifp and should
473 * set it back to NULL to let next check do lookup by name
475 if (ifnlen
&& (strncmp(ifp
->name
, ifname
, IFNAMSIZ
) != 0)) {
476 if (IS_ZEBRA_DEBUG_KERNEL
)
478 "%s: ifp name %s doesn't match sdl name %s",
479 __func__
, ifp
->name
, ifname
);
485 * If we dont have an ifp, try looking up by name. Particularly as some
486 * systems (Solaris) have a 1:many mapping of ifindex:ifname - the
488 * is therefore our unique handle to that interface.
490 * Interfaces specified in the configuration file for which the ifindex
491 * has not been determined will have ifindex == IFINDEX_INTERNAL, and
493 * interfaces are found by this search, and then their ifindex values
497 if ((ifp
== NULL
) && ifnlen
)
498 ifp
= if_lookup_by_name(ifname
, VRF_DEFAULT
);
501 * If ifp still does not exist or has an invalid index
502 * (IFINDEX_INTERNAL),
503 * create or fill in an interface.
505 if ((ifp
== NULL
) || (ifp
->ifindex
== IFINDEX_INTERNAL
)) {
507 * To create or fill in an interface, a sockaddr_dl (via
508 * RTA_IFP) is required.
511 zlog_debug("Interface index %d (new) missing ifname\n",
516 #ifndef RTM_IFANNOUNCE
517 /* Down->Down interface should be ignored here.
518 * See further comment below.
520 if (!CHECK_FLAG(ifm
->ifm_flags
, IFF_UP
))
522 #endif /* !RTM_IFANNOUNCE */
525 /* Interface that zebra was not previously aware of, so
527 ifp
= if_create(ifname
, VRF_DEFAULT
);
528 if (IS_ZEBRA_DEBUG_KERNEL
)
529 zlog_debug("%s: creating ifp for ifindex %d",
530 __func__
, ifm
->ifm_index
);
533 if (IS_ZEBRA_DEBUG_KERNEL
)
535 "%s: updated/created ifp, ifname %s, ifindex %d",
536 __func__
, ifp
->name
, ifp
->ifindex
);
538 * Fill in newly created interface structure, or larval
539 * structure with ifindex IFINDEX_INTERNAL.
541 if_set_index(ifp
, ifm
->ifm_index
);
543 #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */
544 bsd_linkdetect_translate(ifm
);
545 #endif /* HAVE_BSD_IFI_LINK_STATE */
547 if_flags_update(ifp
, ifm
->ifm_flags
);
548 #if defined(__bsdi__)
552 #endif /* __bsdi__ */
556 * XXX sockaddr_dl contents can be larger than the structure
557 * definition. There are 2 big families here:
558 * - BSD has sdl_len + sdl_data[16] + overruns sdl_data
559 * we MUST use sdl_len here or we'll truncate data.
560 * - Solaris has no sdl_len, but sdl_data[244]
561 * presumably, it's not going to run past that, so sizeof()
563 * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid
565 ifp
->ll_type
= ZEBRA_LLT_UNKNOWN
;
566 ifp
->hw_addr_len
= 0;
568 #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN
569 memcpy(&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
,
572 memcpy(&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
,
573 sizeof(struct sockaddr_dl
));
574 #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */
576 ifp
->ll_type
= sdl_to_zebra_link_type(sdl
->sdl_type
);
577 if (sdl
->sdl_alen
<= sizeof(ifp
->hw_addr
)) {
578 memcpy(ifp
->hw_addr
, LLADDR(sdl
),
580 ifp
->hw_addr_len
= sdl
->sdl_alen
;
587 * Interface structure exists. Adjust stored flags from
588 * notification. If interface has up->down or down->up
589 * transition, call state change routines (to adjust routes,
590 * notify routing daemons, etc.). (Other flag changes are stored
591 * but apparently do not trigger action.)
594 if (ifp
->ifindex
!= ifm
->ifm_index
) {
596 "%s: index mismatch, ifname %s, ifp index %d, "
598 __func__
, ifp
->name
, ifp
->ifindex
,
603 #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */
604 bsd_linkdetect_translate(ifm
);
605 #endif /* HAVE_BSD_IFI_LINK_STATE */
607 /* update flags and handle operative->inoperative transition, if
609 if_flags_update(ifp
, ifm
->ifm_flags
);
611 #ifndef RTM_IFANNOUNCE
612 if (!if_is_up(ifp
)) {
613 /* No RTM_IFANNOUNCE on this platform, so we can never
614 * distinguish between ~IFF_UP and delete. We must
616 * it has been deleted.
617 * Eg, Solaris will not notify us of unplumb.
619 * XXX: Fixme - this should be runtime detected
620 * So that a binary compiled on a system with IFANNOUNCE
621 * will still behave correctly if run on a platform
624 if_delete_update(ifp
);
626 #endif /* RTM_IFANNOUNCE */
628 #if defined(__bsdi__)
632 #endif /* __bsdi__ */
637 #ifdef HAVE_NET_RT_IFLIST
638 ifp
->stats
= ifm
->ifm_data
;
639 #endif /* HAVE_NET_RT_IFLIST */
640 ifp
->speed
= ifm
->ifm_data
.ifi_baudrate
/ 1000000;
642 if (IS_ZEBRA_DEBUG_KERNEL
)
643 zlog_debug("%s: interface %s index %d", __func__
, ifp
->name
,
649 /* Address read from struct ifa_msghdr. */
650 static void ifam_read_mesg(struct ifa_msghdr
*ifm
, union sockunion
*addr
,
651 union sockunion
*mask
, union sockunion
*brd
,
652 char *ifname
, short *ifnlen
)
656 union sockunion gateway
;
658 pnt
= (caddr_t
)(ifm
+ 1);
659 end
= ((caddr_t
)ifm
) + ifm
->ifam_msglen
;
661 /* Be sure structure is cleared */
662 memset(mask
, 0, sizeof(union sockunion
));
663 memset(addr
, 0, sizeof(union sockunion
));
664 memset(brd
, 0, sizeof(union sockunion
));
665 memset(&dst
, 0, sizeof(union sockunion
));
666 memset(&gateway
, 0, sizeof(union sockunion
));
668 /* We fetch each socket variable into sockunion. */
669 RTA_ADDR_GET(&dst
, RTA_DST
, ifm
->ifam_addrs
, pnt
);
670 RTA_ADDR_GET(&gateway
, RTA_GATEWAY
, ifm
->ifam_addrs
, pnt
);
671 RTA_ATTR_GET(mask
, RTA_NETMASK
, ifm
->ifam_addrs
, pnt
);
672 RTA_ADDR_GET(NULL
, RTA_GENMASK
, ifm
->ifam_addrs
, pnt
);
673 RTA_NAME_GET(ifname
, RTA_IFP
, ifm
->ifam_addrs
, pnt
, *ifnlen
);
674 RTA_ADDR_GET(addr
, RTA_IFA
, ifm
->ifam_addrs
, pnt
);
675 RTA_ADDR_GET(NULL
, RTA_AUTHOR
, ifm
->ifam_addrs
, pnt
);
676 RTA_ADDR_GET(brd
, RTA_BRD
, ifm
->ifam_addrs
, pnt
);
678 RTA_ATTR_GET(NULL
, RTA_LABEL
, ifm
->ifam_addrs
, pnt
);
681 RTA_ADDR_GET(NULL
, RTA_SRC
, ifm
->ifam_addrs
, pnt
);
684 if (IS_ZEBRA_DEBUG_KERNEL
) {
685 int family
= sockunion_family(addr
);
689 char buf
[4][INET6_ADDRSTRLEN
];
691 "%s: ifindex %d, ifname %s, ifam_addrs 0x%x, "
692 "ifam_flags 0x%x, addr %s/%d broad %s dst %s "
694 __func__
, ifm
->ifam_index
,
695 (ifnlen
? ifname
: "(nil)"), ifm
->ifam_addrs
,
697 inet_ntop(family
, &addr
->sin
.sin_addr
, buf
[0],
699 ip_masklen(mask
->sin
.sin_addr
),
700 inet_ntop(family
, &brd
->sin
.sin_addr
, buf
[1],
702 inet_ntop(family
, &dst
.sin
.sin_addr
, buf
[2],
704 inet_ntop(family
, &gateway
.sin
.sin_addr
, buf
[3],
708 zlog_debug("%s: ifindex %d, ifname %s, ifam_addrs 0x%x",
709 __func__
, ifm
->ifam_index
,
710 (ifnlen
? ifname
: "(nil)"),
716 /* Assert read up end point matches to end point */
718 zlog_debug("ifam_read() doesn't read all socket data");
721 /* Interface's address information get. */
722 int ifam_read(struct ifa_msghdr
*ifam
)
724 struct interface
*ifp
= NULL
;
725 union sockunion addr
, mask
, brd
;
726 char ifname
[INTERFACE_NAMSIZ
];
731 ifname
[0] = ifname
[INTERFACE_NAMSIZ
- 1] = '\0';
733 /* Allocate and read address information. */
734 ifam_read_mesg(ifam
, &addr
, &mask
, &brd
, ifname
, &ifnlen
);
736 if ((ifp
= if_lookup_by_index(ifam
->ifam_index
, VRF_DEFAULT
)) == NULL
) {
737 flog_warn(EC_ZEBRA_UNKNOWN_INTERFACE
,
738 "%s: no interface for ifname %s, index %d", __func__
,
739 ifname
, ifam
->ifam_index
);
743 if (ifnlen
&& strncmp(ifp
->name
, ifname
, INTERFACE_NAMSIZ
))
746 /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD
747 field contains a broadcast address or a peer address, so we are
749 rely upon the interface type. */
750 if (if_is_pointopoint(ifp
))
751 SET_FLAG(flags
, ZEBRA_IFA_PEER
);
754 /* it might seem cute to grab the interface metric here, however
755 * we're processing an address update message, and so some systems
756 * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left
757 * in deliberately, as comment.
759 ifp
->metric
= ifam
->ifam_metric
;
762 /* Add connected address. */
763 switch (sockunion_family(&addr
)) {
765 if (ifam
->ifam_type
== RTM_NEWADDR
)
766 connected_add_ipv4(ifp
, flags
, &addr
.sin
.sin_addr
,
767 ip_masklen(mask
.sin
.sin_addr
),
769 (isalias
? ifname
: NULL
));
771 connected_delete_ipv4(ifp
, flags
, &addr
.sin
.sin_addr
,
772 ip_masklen(mask
.sin
.sin_addr
),
776 /* Unset interface index from link-local address when IPv6 stack
778 if (IN6_IS_ADDR_LINKLOCAL(&addr
.sin6
.sin6_addr
)) {
779 SET_IN6_LINKLOCAL_IFINDEX(addr
.sin6
.sin6_addr
, 0);
782 if (ifam
->ifam_type
== RTM_NEWADDR
)
783 connected_add_ipv6(ifp
, flags
, &addr
.sin6
.sin6_addr
,
785 ip6_masklen(mask
.sin6
.sin6_addr
),
786 (isalias
? ifname
: NULL
));
788 connected_delete_ipv6(ifp
, &addr
.sin6
.sin6_addr
, NULL
,
789 ip6_masklen(mask
.sin6
.sin6_addr
));
792 /* Unsupported family silently ignore... */
796 /* Check interface flag for implicit up of the interface. */
800 /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange.
801 * See comments for SUNOS_5 in interface.c::if_flags_mangle.
803 * Here we take care of case where the real IFF_UP was previously
804 * unset (as kept in struct zebra_if.primary_state) and the mangled
805 * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned
806 * to unset due to the lost non-primary address having DELADDR'd.
808 * we must delete the interface, because in between here and next
809 * event for this interface-name the administrator could unplumb
810 * and replumb the interface.
813 if_delete_update(ifp
);
819 /* Interface function for reading kernel routing table information. */
820 static int rtm_read_mesg(struct rt_msghdr
*rtm
, union sockunion
*dest
,
821 union sockunion
*mask
, union sockunion
*gate
,
822 char *ifname
, short *ifnlen
)
826 /* Pnt points out socket data start point. */
827 pnt
= (caddr_t
)(rtm
+ 1);
828 end
= ((caddr_t
)rtm
) + rtm
->rtm_msglen
;
830 /* rt_msghdr version check. */
831 if (rtm
->rtm_version
!= RTM_VERSION
)
832 flog_warn(EC_ZEBRA_RTM_VERSION_MISMATCH
,
833 "Routing message version different %d should be %d."
834 "This may cause problem\n",
835 rtm
->rtm_version
, RTM_VERSION
);
837 /* Be sure structure is cleared */
838 memset(dest
, 0, sizeof(union sockunion
));
839 memset(gate
, 0, sizeof(union sockunion
));
840 memset(mask
, 0, sizeof(union sockunion
));
842 /* We fetch each socket variable into sockunion. */
843 RTA_ADDR_GET(dest
, RTA_DST
, rtm
->rtm_addrs
, pnt
);
844 RTA_ADDR_GET(gate
, RTA_GATEWAY
, rtm
->rtm_addrs
, pnt
);
845 RTA_ATTR_GET(mask
, RTA_NETMASK
, rtm
->rtm_addrs
, pnt
);
846 RTA_ADDR_GET(NULL
, RTA_GENMASK
, rtm
->rtm_addrs
, pnt
);
847 RTA_NAME_GET(ifname
, RTA_IFP
, rtm
->rtm_addrs
, pnt
, *ifnlen
);
848 RTA_ADDR_GET(NULL
, RTA_IFA
, rtm
->rtm_addrs
, pnt
);
849 RTA_ADDR_GET(NULL
, RTA_AUTHOR
, rtm
->rtm_addrs
, pnt
);
850 RTA_ADDR_GET(NULL
, RTA_BRD
, rtm
->rtm_addrs
, pnt
);
853 union sockunion label
;
854 memset(&label
, 0, sizeof(label
));
855 RTA_ATTR_GET(&label
, RTA_LABEL
, rtm
->rtm_addrs
, pnt
);
857 RTA_ATTR_GET(NULL
, RTA_LABEL
, rtm
->rtm_addrs
, pnt
);
860 RTA_ADDR_GET(NULL
, RTA_SRC
, rtm
->rtm_addrs
, pnt
);
863 /* If there is netmask information set it's family same as
865 if (rtm
->rtm_addrs
& RTA_NETMASK
)
866 mask
->sa
.sa_family
= dest
->sa
.sa_family
;
868 /* Assert read up to the end of pointer. */
870 zlog_debug("rtm_read() doesn't read all socket data.");
872 return rtm
->rtm_flags
;
875 void rtm_read(struct rt_msghdr
*rtm
)
879 union sockunion dest
, mask
, gate
;
880 char ifname
[INTERFACE_NAMSIZ
+ 1];
886 /* Read destination and netmask and gateway from rtm message
888 flags
= rtm_read_mesg(rtm
, &dest
, &mask
, &gate
, ifname
, &ifnlen
);
889 if (!(flags
& RTF_DONE
))
891 if (IS_ZEBRA_DEBUG_KERNEL
)
892 zlog_debug("%s: got rtm of type %d (%s)", __func__
,
894 lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
));
896 #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/
897 if (flags
& RTF_CLONED
)
900 #ifdef RTF_WASCLONED /*freebsd*/
901 if (flags
& RTF_WASCLONED
)
905 if ((rtm
->rtm_type
== RTM_ADD
|| rtm
->rtm_type
== RTM_CHANGE
)
906 && !(flags
& RTF_UP
))
909 /* This is connected route. */
910 if (!(flags
& RTF_GATEWAY
))
913 if (flags
& RTF_PROTO1
)
914 SET_FLAG(zebra_flags
, ZEBRA_FLAG_SELFROUTE
);
916 /* This is persistent route. */
917 if (flags
& RTF_STATIC
)
918 SET_FLAG(zebra_flags
, ZEBRA_FLAG_STATIC
);
920 memset(&nh
, 0, sizeof(nh
));
922 nh
.vrf_id
= VRF_DEFAULT
;
923 /* This is a reject or blackhole route */
924 if (flags
& RTF_REJECT
) {
925 nh
.type
= NEXTHOP_TYPE_BLACKHOLE
;
926 nh
.bh_type
= BLACKHOLE_REJECT
;
927 } else if (flags
& RTF_BLACKHOLE
) {
928 nh
.type
= NEXTHOP_TYPE_BLACKHOLE
;
929 nh
.bh_type
= BLACKHOLE_NULL
;
932 if (dest
.sa
.sa_family
== AF_INET
) {
936 p
.u
.prefix4
= dest
.sin
.sin_addr
;
937 if (flags
& RTF_HOST
)
938 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
940 p
.prefixlen
= ip_masklen(mask
.sin
.sin_addr
);
942 /* Catch self originated messages and match them against our
944 * At the same time, ignore unconfirmed messages, they should be
946 * by rtm_write() and kernel_rtm_ipv4().
948 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
) {
949 char buf
[PREFIX_STRLEN
], gate_buf
[INET_ADDRSTRLEN
];
951 if (!IS_ZEBRA_DEBUG_RIB
)
953 ret
= rib_lookup_ipv4_route((struct prefix_ipv4
*)&p
,
955 prefix2str(&p
, buf
, sizeof(buf
));
956 switch (rtm
->rtm_type
) {
960 /* The kernel notifies us about a new route in
962 Do we have a correspondent entry in our RIB?
965 case ZEBRA_RIB_NOTFOUND
:
967 "%s: %s %s: desync: RR isn't yet in RIB, while already in FIB",
969 lookup_msg(rtm_type_str
,
970 rtm
->rtm_type
, NULL
),
973 case ZEBRA_RIB_FOUND_CONNECTED
:
974 case ZEBRA_RIB_FOUND_NOGATE
:
975 inet_ntop(AF_INET
, &gate
.sin
.sin_addr
,
976 gate_buf
, INET_ADDRSTRLEN
);
978 "%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)",
980 lookup_msg(rtm_type_str
,
981 rtm
->rtm_type
, NULL
),
984 case ZEBRA_RIB_FOUND_EXACT
: /* RIB RR == FIB RR
987 "%s: %s %s: done Ok", __func__
,
988 lookup_msg(rtm_type_str
,
989 rtm
->rtm_type
, NULL
),
992 (struct prefix_ipv4
*)&p
,
999 /* The kernel notifies us about a route deleted
1001 have it in the RIB? Do we have anything
1004 case ZEBRA_RIB_FOUND_EXACT
:
1006 "%s: %s %s: desync: RR is still in RIB, while already not in FIB",
1008 lookup_msg(rtm_type_str
,
1009 rtm
->rtm_type
, NULL
),
1011 rib_lookup_and_dump(
1012 (struct prefix_ipv4
*)&p
,
1015 case ZEBRA_RIB_FOUND_CONNECTED
:
1016 case ZEBRA_RIB_FOUND_NOGATE
:
1018 "%s: %s %s: desync: RR is still in RIB, plus gate differs",
1020 lookup_msg(rtm_type_str
,
1021 rtm
->rtm_type
, NULL
),
1023 rib_lookup_and_dump(
1024 (struct prefix_ipv4
*)&p
,
1027 case ZEBRA_RIB_NOTFOUND
: /* RIB RR == FIB RR */
1029 "%s: %s %s: done Ok", __func__
,
1030 lookup_msg(rtm_type_str
,
1031 rtm
->rtm_type
, NULL
),
1033 rib_lookup_and_dump(
1034 (struct prefix_ipv4
*)&p
,
1042 "%s: %s: warning: loopback RTM of type %s received",
1044 lookup_msg(rtm_type_str
, rtm
->rtm_type
,
1050 /* Change, delete the old prefix, we have no further information
1051 * to specify the route really
1053 if (rtm
->rtm_type
== RTM_CHANGE
)
1054 rib_delete(AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
,
1055 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1056 NULL
, 0, 0, 0, true);
1059 nh
.type
= NEXTHOP_TYPE_IPV4
;
1060 nh
.gate
.ipv4
= gate
.sin
.sin_addr
;
1063 if (rtm
->rtm_type
== RTM_GET
|| rtm
->rtm_type
== RTM_ADD
1064 || rtm
->rtm_type
== RTM_CHANGE
)
1065 rib_add(AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
,
1066 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1067 &nh
, 0, 0, 0, 0, 0);
1069 rib_delete(AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
,
1070 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1071 &nh
, 0, 0, 0, true);
1073 if (dest
.sa
.sa_family
== AF_INET6
) {
1074 /* One day we might have a debug section here like one in the
1075 * IPv4 case above. Just ignore own messages at the moment.
1077 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
)
1080 ifindex_t ifindex
= 0;
1082 p
.family
= AF_INET6
;
1083 p
.u
.prefix6
= dest
.sin6
.sin6_addr
;
1084 if (flags
& RTF_HOST
)
1085 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
1087 p
.prefixlen
= ip6_masklen(mask
.sin6
.sin6_addr
);
1090 if (IN6_IS_ADDR_LINKLOCAL(&gate
.sin6
.sin6_addr
)) {
1091 ifindex
= IN6_LINKLOCAL_IFINDEX(gate
.sin6
.sin6_addr
);
1092 SET_IN6_LINKLOCAL_IFINDEX(gate
.sin6
.sin6_addr
, 0);
1096 /* CHANGE: delete the old prefix, we have no further information
1097 * to specify the route really
1099 if (rtm
->rtm_type
== RTM_CHANGE
)
1100 rib_delete(AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
,
1101 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1102 NULL
, 0, 0, 0, true);
1105 nh
.type
= ifindex
? NEXTHOP_TYPE_IPV6_IFINDEX
1106 : NEXTHOP_TYPE_IPV6
;
1107 nh
.gate
.ipv6
= gate
.sin6
.sin6_addr
;
1108 nh
.ifindex
= ifindex
;
1111 if (rtm
->rtm_type
== RTM_GET
|| rtm
->rtm_type
== RTM_ADD
1112 || rtm
->rtm_type
== RTM_CHANGE
)
1113 rib_add(AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
,
1114 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1115 &nh
, 0, 0, 0, 0, 0);
1117 rib_delete(AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
,
1118 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1119 &nh
, 0, 0, 0, true);
1123 /* Interface function for the kernel routing table updates. Support
1124 * for RTM_CHANGE will be needed.
1125 * Exported only for rt_socket.c
1127 int rtm_write(int message
, union sockunion
*dest
, union sockunion
*mask
,
1128 union sockunion
*gate
, union sockunion
*mpls
, unsigned int index
,
1129 enum blackhole_type bh_type
, int metric
)
1133 struct interface
*ifp
;
1135 /* Sequencial number of routing message. */
1136 static int msg_seq
= 0;
1138 /* Struct of rt_msghdr and buffer for storing socket's data. */
1140 struct rt_msghdr rtm
;
1144 if (dplane_routing_sock
< 0)
1145 return ZEBRA_ERR_EPERM
;
1147 /* Clear and set rt_msghdr values */
1148 memset(&msg
, 0, sizeof(struct rt_msghdr
));
1149 msg
.rtm
.rtm_version
= RTM_VERSION
;
1150 msg
.rtm
.rtm_type
= message
;
1151 msg
.rtm
.rtm_seq
= msg_seq
++;
1152 msg
.rtm
.rtm_addrs
= RTA_DST
;
1153 msg
.rtm
.rtm_addrs
|= RTA_GATEWAY
;
1154 msg
.rtm
.rtm_flags
= RTF_UP
;
1156 msg
.rtm
.rtm_flags
|= RTF_MPATH
;
1157 msg
.rtm
.rtm_fmask
= RTF_MPLS
;
1159 msg
.rtm
.rtm_index
= index
;
1162 msg
.rtm
.rtm_rmx
.rmx_hopcount
= metric
;
1163 msg
.rtm
.rtm_inits
|= RTV_HOPCOUNT
;
1166 ifp
= if_lookup_by_index(index
, VRF_DEFAULT
);
1168 if (gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
))
1169 msg
.rtm
.rtm_flags
|= RTF_GATEWAY
;
1171 /* When RTF_CLONING is unavailable on BSD, should we set some
1172 * other flag instead?
1175 if (!gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
) && ifp
1176 && (ifp
->flags
& IFF_POINTOPOINT
) == 0)
1177 msg
.rtm
.rtm_flags
|= RTF_CLONING
;
1178 #endif /* RTF_CLONING */
1180 /* If no protocol specific gateway is specified, use link
1181 address for gateway. */
1184 char dest_buf
[INET_ADDRSTRLEN
] = "NULL",
1185 mask_buf
[INET_ADDRSTRLEN
] = "255.255.255.255";
1187 inet_ntop(AF_INET
, &dest
->sin
.sin_addr
,
1188 dest_buf
, INET_ADDRSTRLEN
);
1190 inet_ntop(AF_INET
, &mask
->sin
.sin_addr
,
1191 mask_buf
, INET_ADDRSTRLEN
);
1193 EC_ZEBRA_RTM_NO_GATEWAY
,
1194 "%s: %s/%s: gate == NULL and no gateway found for ifindex %d",
1195 __func__
, dest_buf
, mask_buf
, index
);
1198 gate
= (union sockunion
*)&((struct zebra_if
*)ifp
->info
)->sdl
;
1202 msg
.rtm
.rtm_addrs
|= RTA_NETMASK
;
1203 else if (message
== RTM_ADD
|| message
== RTM_CHANGE
)
1204 msg
.rtm
.rtm_flags
|= RTF_HOST
;
1208 msg
.rtm
.rtm_addrs
|= RTA_SRC
;
1209 msg
.rtm
.rtm_flags
|= RTF_MPLS
;
1211 if (mpls
->smpls
.smpls_label
1212 != htonl(MPLS_LABEL_IMPLICIT_NULL
<< MPLS_LABEL_OFFSET
))
1213 msg
.rtm
.rtm_mpls
= MPLS_OP_PUSH
;
1217 /* Tagging route with flags */
1218 msg
.rtm
.rtm_flags
|= (RTF_PROTO1
);
1221 case BLACKHOLE_UNSPEC
:
1223 case BLACKHOLE_REJECT
:
1224 msg
.rtm
.rtm_flags
|= RTF_REJECT
;
1227 msg
.rtm
.rtm_flags
|= RTF_BLACKHOLE
;
1232 #define SOCKADDRSET(X, R) \
1233 if (msg.rtm.rtm_addrs & (R)) { \
1234 int len = SAROUNDUP(X); \
1235 memcpy(pnt, (caddr_t)(X), len); \
1239 pnt
= (caddr_t
)msg
.buf
;
1241 /* Write each socket data into rtm message buffer */
1242 SOCKADDRSET(dest
, RTA_DST
);
1243 SOCKADDRSET(gate
, RTA_GATEWAY
);
1244 SOCKADDRSET(mask
, RTA_NETMASK
);
1246 SOCKADDRSET(mpls
, RTA_SRC
);
1249 msg
.rtm
.rtm_msglen
= pnt
- (caddr_t
)&msg
;
1251 ret
= write(dplane_routing_sock
, &msg
, msg
.rtm
.rtm_msglen
);
1253 if (ret
!= msg
.rtm
.rtm_msglen
) {
1254 if (errno
== EEXIST
)
1255 return ZEBRA_ERR_RTEXIST
;
1256 if (errno
== ENETUNREACH
)
1257 return ZEBRA_ERR_RTUNREACH
;
1259 return ZEBRA_ERR_RTNOEXIST
;
1261 flog_err_sys(EC_LIB_SOCKET
, "%s: write : %s (%d)", __func__
,
1262 safe_strerror(errno
), errno
);
1263 return ZEBRA_ERR_KERNEL
;
1265 return ZEBRA_ERR_NOERROR
;
1270 #include "zebra/zserv.h"
1272 /* For debug purpose. */
1273 static void rtmsg_debug(struct rt_msghdr
*rtm
)
1275 zlog_debug("Kernel: Len: %d Type: %s", rtm
->rtm_msglen
,
1276 lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
));
1277 rtm_flag_dump(rtm
->rtm_flags
);
1278 zlog_debug("Kernel: message seq %d", rtm
->rtm_seq
);
1279 zlog_debug("Kernel: pid %lld, rtm_addrs 0x%x", (long long)rtm
->rtm_pid
,
1283 /* This is pretty gross, better suggestions welcome -- mhandler */
1286 #define RTAX_MAX RTA_NUMBITS
1289 #endif /* RTA_NUMBITS */
1290 #endif /* RTAX_MAX */
1292 /* Kernel routing table and interface updates via routing socket. */
1293 static int kernel_read(struct thread
*thread
)
1297 struct rt_msghdr
*rtm
;
1300 * This must be big enough for any message the kernel might send.
1301 * Rather than determining how many sockaddrs of what size might be
1302 * in each particular message, just use RTAX_MAX of sockaddr_storage
1303 * for each. Note that the sockaddrs must be after each message
1304 * definition, or rather after whichever happens to be the largest,
1305 * since the buffer needs to be big enough for a message and the
1306 * sockaddrs together.
1309 /* Routing information. */
1311 struct rt_msghdr rtm
;
1312 struct sockaddr_storage addr
[RTAX_MAX
];
1315 /* Interface information. */
1317 struct if_msghdr ifm
;
1318 struct sockaddr_storage addr
[RTAX_MAX
];
1321 /* Interface address information. */
1323 struct ifa_msghdr ifa
;
1324 struct sockaddr_storage addr
[RTAX_MAX
];
1327 #ifdef RTM_IFANNOUNCE
1328 /* Interface arrival/departure */
1330 struct if_announcemsghdr ifan
;
1331 struct sockaddr_storage addr
[RTAX_MAX
];
1333 #endif /* RTM_IFANNOUNCE */
1337 /* Fetch routing socket. */
1338 sock
= THREAD_FD(thread
);
1340 nbytes
= read(sock
, &buf
, sizeof buf
);
1343 if (nbytes
< 0 && errno
!= EWOULDBLOCK
&& errno
!= EAGAIN
)
1344 flog_err_sys(EC_LIB_SOCKET
, "routing socket error: %s",
1345 safe_strerror(errno
));
1349 thread_add_read(zebrad
.master
, kernel_read
, NULL
, sock
, NULL
);
1351 if (IS_ZEBRA_DEBUG_KERNEL
)
1352 rtmsg_debug(&buf
.r
.rtm
);
1357 * Ensure that we didn't drop any data, so that processing routines
1358 * can assume they have the whole message.
1360 if (rtm
->rtm_msglen
!= nbytes
) {
1362 "kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n",
1363 rtm
->rtm_msglen
, nbytes
, rtm
->rtm_type
);
1367 switch (rtm
->rtm_type
) {
1374 ifm_read(&buf
.im
.ifm
);
1378 ifam_read(&buf
.ia
.ifa
);
1380 #ifdef RTM_IFANNOUNCE
1381 case RTM_IFANNOUNCE
:
1382 ifan_read(&buf
.ian
.ifan
);
1384 #endif /* RTM_IFANNOUNCE */
1386 if (IS_ZEBRA_DEBUG_KERNEL
)
1387 zlog_debug("Unprocessed RTM_type: %d", rtm
->rtm_type
);
1393 /* Make routing socket. */
1394 static void routing_socket(struct zebra_ns
*zns
)
1396 frr_elevate_privs(&zserv_privs
) {
1397 routing_sock
= ns_socket(AF_ROUTE
, SOCK_RAW
, 0, zns
->ns_id
);
1399 dplane_routing_sock
=
1400 ns_socket(AF_ROUTE
, SOCK_RAW
, 0, zns
->ns_id
);
1403 if (routing_sock
< 0) {
1404 flog_err_sys(EC_LIB_SOCKET
, "Can't init kernel routing socket");
1408 if (dplane_routing_sock
< 0) {
1409 flog_err_sys(EC_LIB_SOCKET
,
1410 "Can't init kernel dataplane routing socket");
1414 /* XXX: Socket should be NONBLOCK, however as we currently
1415 * discard failed writes, this will lead to inconsistencies.
1416 * For now, socket must be blocking.
1418 /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0)
1419 zlog_warn ("Can't set O_NONBLOCK to routing socket");*/
1421 /* kernel_read needs rewrite. */
1422 thread_add_read(zebrad
.master
, kernel_read
, NULL
, routing_sock
, NULL
);
1425 /* Exported interface function. This function simply calls
1426 routing_socket (). */
1427 void kernel_init(struct zebra_ns
*zns
)
1429 routing_socket(zns
);
1432 void kernel_terminate(struct zebra_ns
*zns
, bool complete
)
1437 #endif /* !HAVE_NETLINK */