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
22 #include <net/if_types.h>
24 #include <netmpls/mpls.h>
29 #include "sockunion.h"
30 #include "connected.h"
32 #include "zebra_memory.h"
40 #include "zebra/interface.h"
41 #include "zebra/zserv.h"
42 #include "zebra/debug.h"
43 #include "zebra/kernel_socket.h"
44 #include "zebra/rib.h"
46 extern struct zebra_privs_t zserv_privs
;
49 * Historically, the BSD routing socket has aligned data following a
50 * struct sockaddr to sizeof(long), which was 4 bytes on some
51 * platforms, and 8 bytes on others. NetBSD 6 changed the routing
52 * socket to align to sizeof(uint64_t), which is 8 bytes. OS X
53 * appears to align to sizeof(int), which is 4 bytes.
55 * Alignment of zero-sized sockaddrs is nonsensical, but historically
56 * BSD defines RT_ROUNDUP(0) to be the alignment interval (rather than
57 * 0). We follow this practice without questioning it, but it is a
58 * bug if quagga calls ROUNDUP with 0.
62 * Because of these varying conventions, the only sane approach is for
63 * the <net/route.h> header to define some flavor of ROUNDUP macro.
67 /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */
68 #define SAROUNDUP(a) SA_SIZE(a)
71 #if defined(RT_ROUNDUP)
72 #define ROUNDUP(a) RT_ROUNDUP(a)
73 #endif /* defined(RT_ROUNDUP) */
76 /* Solaris has struct sockaddr_in[6] definitions at 16 / 32 bytes size,
77 * so the whole concept doesn't really apply. */
78 #define ROUNDUP(a) (a)
82 * If ROUNDUP has not yet been defined in terms of platform-provided
83 * defines, attempt to cope with heuristics.
88 * It's a bug for a platform not to define rounding/alignment for
89 * sockaddrs on the routing socket. This warning really is
90 * intentional, to provoke filing bug reports with operating systems
91 * that don't define RT_ROUNDUP or equivalent.
94 "net/route.h does not define RT_ROUNDUP; making unwarranted assumptions!"
96 /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */
98 #define ROUNDUP_TYPE int
100 #define ROUNDUP_TYPE long
104 ((a) > 0 ? (1 + (((a)-1) | (sizeof(ROUNDUP_TYPE) - 1))) \
105 : sizeof(ROUNDUP_TYPE))
107 #endif /* defined(ROUNDUP) */
110 * Given a pointer (sockaddr or void *), return the number of bytes
111 * taken up by the sockaddr and any padding needed for alignment.
113 #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
114 #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len)
117 * One would hope all fixed-size structure definitions are aligned,
118 * but round them up nonetheless.
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))))
128 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
130 #endif /* !SA_SIZE */
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
139 static inline void rta_copy(union sockunion
*dest
, caddr_t src
)
144 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
145 len
= (((struct sockaddr
*)src
)->sa_len
> sizeof(*dest
))
147 : ((struct sockaddr
*)src
)->sa_len
;
149 len
= (SAROUNDUP(src
) > sizeof(*dest
)) ? sizeof(*dest
) : SAROUNDUP(src
);
151 memcpy(dest
, src
, len
);
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)); \
161 #define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \
162 if ((RTMADDRS) & (RTA)) { \
163 int len = SAROUNDUP((PNT)); \
164 rta_copy((DEST), (PNT)); \
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; \
186 /* Routing socket message types. */
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"},
196 {RTM_OLDADD
, "RTM_OLDADD"},
197 #endif /* RTM_OLDADD */
199 {RTM_OLDDEL
, "RTM_OLDDEL"},
200 #endif /* RTM_OLDDEL */
201 {RTM_RESOLVE
, "RTM_RESOLVE"},
202 {RTM_NEWADDR
, "RTM_NEWADDR"},
203 {RTM_DELADDR
, "RTM_DELADDR"},
204 {RTM_IFINFO
, "RTM_IFINFO"},
206 {RTM_OIFINFO
, "RTM_OIFINFO"},
207 #endif /* RTM_OIFINFO */
209 {RTM_NEWMADDR
, "RTM_NEWMADDR"},
210 #endif /* RTM_NEWMADDR */
212 {RTM_DELMADDR
, "RTM_DELMADDR"},
213 #endif /* RTM_DELMADDR */
214 #ifdef RTM_IFANNOUNCE
215 {RTM_IFANNOUNCE
, "RTM_IFANNOUNCE"},
216 #endif /* RTM_IFANNOUNCE */
219 static const struct message rtm_flag_str
[] = {{RTF_UP
, "UP"},
220 {RTF_GATEWAY
, "GATEWAY"},
222 {RTF_REJECT
, "REJECT"},
223 {RTF_DYNAMIC
, "DYNAMIC"},
224 {RTF_MODIFIED
, "MODIFIED"},
228 #endif /* RTF_MASK */
230 {RTF_CLONING
, "CLONING"},
231 #endif /* RTF_CLONING */
233 {RTF_XRESOLVE
, "XRESOLVE"},
234 #endif /* RTF_XRESOLVE */
236 {RTF_LLINFO
, "LLINFO"},
237 #endif /* RTF_LLINFO */
238 {RTF_STATIC
, "STATIC"},
239 {RTF_BLACKHOLE
, "BLACKHOLE"},
241 {RTF_PRIVATE
, "PRIVATE"},
242 #endif /* RTF_PRIVATE */
243 {RTF_PROTO1
, "PROTO1"},
244 {RTF_PROTO2
, "PROTO2"},
246 {RTF_PRCLONING
, "PRCLONING"},
247 #endif /* RTF_PRCLONING */
249 {RTF_WASCLONED
, "WASCLONED"},
250 #endif /* RTF_WASCLONED */
252 {RTF_PROTO3
, "PROTO3"},
253 #endif /* RTF_PROTO3 */
255 {RTF_PINNED
, "PINNED"},
256 #endif /* RTF_PINNED */
258 {RTF_LOCAL
, "LOCAL"},
259 #endif /* RTF_LOCAL */
261 {RTF_BROADCAST
, "BROADCAST"},
262 #endif /* RTF_BROADCAST */
264 {RTF_MULTICAST
, "MULTICAST"},
265 #endif /* RTF_MULTICAST */
267 {RTF_MULTIRT
, "MULTIRT"},
268 #endif /* RTF_MULTIRT */
270 {RTF_SETSRC
, "SETSRC"},
271 #endif /* RTF_SETSRC */
274 /* Kernel routing update socket. */
275 int routing_sock
= -1;
277 /* Yes I'm checking ugly routing socket behavior. */
280 /* Supported address family check. */
281 static inline int af_check(int family
)
283 if (family
== AF_INET
)
285 if (family
== AF_INET6
)
290 /* Dump routing table flag for debug purpose. */
291 static void rtm_flag_dump(int flag
)
293 const struct message
*mes
;
294 static char buf
[BUFSIZ
];
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
);
303 zlog_debug("Kernel: %s", buf
);
306 #ifdef RTM_IFANNOUNCE
307 /* Interface adding function */
308 static int ifan_read(struct if_announcemsghdr
*ifan
)
310 struct interface
*ifp
;
312 ifp
= if_lookup_by_index(ifan
->ifan_index
, VRF_DEFAULT
);
315 assert((ifp
->ifindex
== ifan
->ifan_index
)
316 || (ifp
->ifindex
== IFINDEX_INTERNAL
));
319 || ((ifp
->ifindex
== IFINDEX_INTERNAL
)
320 && (ifan
->ifan_what
== IFAN_ARRIVAL
))) {
321 if (IS_ZEBRA_DEBUG_KERNEL
)
323 "%s: creating interface for ifindex %d, name %s",
324 __func__
, ifan
->ifan_index
, ifan
->ifan_name
);
326 /* Create Interface */
327 ifp
= if_get_by_name_len(
329 strnlen(ifan
->ifan_name
, sizeof(ifan
->ifan_name
)),
331 ifp
->ifindex
= ifan
->ifan_index
;
335 } else if (ifp
!= NULL
&& ifan
->ifan_what
== IFAN_DEPARTURE
)
336 if_delete_update(ifp
);
342 if (IS_ZEBRA_DEBUG_KERNEL
)
343 zlog_debug("%s: interface %s index %d", __func__
,
344 ifan
->ifan_name
, ifan
->ifan_index
);
348 #endif /* RTM_IFANNOUNCE */
350 #ifdef HAVE_BSD_IFI_LINK_STATE
351 /* BSD link detect translation */
352 static void bsd_linkdetect_translate(struct if_msghdr
*ifm
)
354 if ((ifm
->ifm_data
.ifi_link_state
>= LINK_STATE_UP
)
355 || (ifm
->ifm_data
.ifi_link_state
== LINK_STATE_UNKNOWN
))
356 SET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
358 UNSET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
360 #endif /* HAVE_BSD_IFI_LINK_STATE */
362 static enum zebra_link_type
sdl_to_zebra_link_type(unsigned int sdlt
)
366 return ZEBRA_LLT_ETHER
;
368 return ZEBRA_LLT_X25
;
370 return ZEBRA_LLT_FDDI
;
372 return ZEBRA_LLT_PPP
;
374 return ZEBRA_LLT_LOOPBACK
;
376 return ZEBRA_LLT_SLIP
;
378 return ZEBRA_LLT_ARCNET
;
380 return ZEBRA_LLT_ATM
;
382 return ZEBRA_LLT_LOCALTLK
;
384 return ZEBRA_LLT_HIPPI
;
387 return ZEBRA_LLT_IEEE1394
;
391 return ZEBRA_LLT_UNKNOWN
;
396 * Handle struct if_msghdr obtained from reading routing socket or
397 * sysctl (from interface_list). There may or may not be sockaddrs
398 * present after the header.
400 int ifm_read(struct if_msghdr
*ifm
)
402 struct interface
*ifp
= NULL
;
403 struct sockaddr_dl
*sdl
;
404 char ifname
[IFNAMSIZ
];
408 /* terminate ifname at head (for strnlen) and tail (for safety) */
409 ifname
[IFNAMSIZ
- 1] = '\0';
411 /* paranoia: sanity check structure */
412 if (ifm
->ifm_msglen
< sizeof(struct if_msghdr
)) {
413 zlog_err("ifm_read: ifm->ifm_msglen %d too short\n",
419 * Check for a sockaddr_dl following the message. First, point to
420 * where a socakddr might be if one follows the message.
422 cp
= (void *)(ifm
+ 1);
426 * XXX This behavior should be narrowed to only the kernel versions
427 * for which the structures returned do not match the headers.
429 * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions
430 * is 12 bytes larger than the 32 bit version.
432 if (((struct sockaddr
*)cp
)->sa_family
== AF_UNSPEC
)
436 RTA_ADDR_GET(NULL
, RTA_DST
, ifm
->ifm_addrs
, cp
);
437 RTA_ADDR_GET(NULL
, RTA_GATEWAY
, ifm
->ifm_addrs
, cp
);
438 RTA_ATTR_GET(NULL
, RTA_NETMASK
, ifm
->ifm_addrs
, cp
);
439 RTA_ADDR_GET(NULL
, RTA_GENMASK
, ifm
->ifm_addrs
, cp
);
440 sdl
= (struct sockaddr_dl
*)cp
;
441 RTA_NAME_GET(ifname
, RTA_IFP
, ifm
->ifm_addrs
, cp
, ifnlen
);
442 RTA_ADDR_GET(NULL
, RTA_IFA
, ifm
->ifm_addrs
, cp
);
443 RTA_ADDR_GET(NULL
, RTA_AUTHOR
, ifm
->ifm_addrs
, cp
);
444 RTA_ADDR_GET(NULL
, RTA_BRD
, ifm
->ifm_addrs
, cp
);
446 if (IS_ZEBRA_DEBUG_KERNEL
)
447 zlog_debug("%s: sdl ifname %s", __func__
,
448 (ifnlen
? ifname
: "(nil)"));
451 * Look up on ifindex first, because ifindices are the primary handle
453 * interfaces across the user/kernel boundary, for most systems. (Some
454 * messages, such as up/down status changes on NetBSD, do not include a
457 if ((ifp
= if_lookup_by_index(ifm
->ifm_index
, VRF_DEFAULT
)) != NULL
) {
458 /* we have an ifp, verify that the name matches as some systems,
459 * eg Solaris, have a 1:many association of ifindex:ifname
460 * if they dont match, we dont have the correct ifp and should
461 * set it back to NULL to let next check do lookup by name
463 if (ifnlen
&& (strncmp(ifp
->name
, ifname
, IFNAMSIZ
) != 0)) {
464 if (IS_ZEBRA_DEBUG_KERNEL
)
466 "%s: ifp name %s doesnt match sdl name %s",
467 __func__
, ifp
->name
, ifname
);
473 * If we dont have an ifp, try looking up by name. Particularly as some
474 * systems (Solaris) have a 1:many mapping of ifindex:ifname - the
476 * is therefore our unique handle to that interface.
478 * Interfaces specified in the configuration file for which the ifindex
479 * has not been determined will have ifindex == IFINDEX_INTERNAL, and
481 * interfaces are found by this search, and then their ifindex values
485 if ((ifp
== NULL
) && ifnlen
)
486 ifp
= if_lookup_by_name(ifname
, VRF_DEFAULT
);
489 * If ifp still does not exist or has an invalid index
490 * (IFINDEX_INTERNAL),
491 * create or fill in an interface.
493 if ((ifp
== NULL
) || (ifp
->ifindex
== IFINDEX_INTERNAL
)) {
495 * To create or fill in an interface, a sockaddr_dl (via
496 * RTA_IFP) is required.
499 zlog_warn("Interface index %d (new) missing ifname\n",
504 #ifndef RTM_IFANNOUNCE
505 /* Down->Down interface should be ignored here.
506 * See further comment below.
508 if (!CHECK_FLAG(ifm
->ifm_flags
, IFF_UP
))
510 #endif /* !RTM_IFANNOUNCE */
513 /* Interface that zebra was not previously aware of, so
515 ifp
= if_create(ifname
, ifnlen
, VRF_DEFAULT
);
516 if (IS_ZEBRA_DEBUG_KERNEL
)
517 zlog_debug("%s: creating ifp for ifindex %d",
518 __func__
, ifm
->ifm_index
);
521 if (IS_ZEBRA_DEBUG_KERNEL
)
523 "%s: updated/created ifp, ifname %s, ifindex %d",
524 __func__
, ifp
->name
, ifp
->ifindex
);
526 * Fill in newly created interface structure, or larval
527 * structure with ifindex IFINDEX_INTERNAL.
529 ifp
->ifindex
= ifm
->ifm_index
;
531 #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */
532 bsd_linkdetect_translate(ifm
);
533 #endif /* HAVE_BSD_IFI_LINK_STATE */
535 if_flags_update(ifp
, ifm
->ifm_flags
);
536 #if defined(__bsdi__)
540 #endif /* __bsdi__ */
544 * XXX sockaddr_dl contents can be larger than the structure
545 * definition. There are 2 big families here:
546 * - BSD has sdl_len + sdl_data[16] + overruns sdl_data
547 * we MUST use sdl_len here or we'll truncate data.
548 * - Solaris has no sdl_len, but sdl_data[244]
549 * presumably, it's not going to run past that, so sizeof()
551 * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid
553 ifp
->ll_type
= ZEBRA_LLT_UNKNOWN
;
554 ifp
->hw_addr_len
= 0;
556 #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN
557 memcpy(&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
,
560 memcpy(&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
,
561 sizeof(struct sockaddr_dl
));
562 #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */
564 ifp
->ll_type
= sdl_to_zebra_link_type(sdl
->sdl_type
);
565 if (sdl
->sdl_alen
<= sizeof(ifp
->hw_addr
)) {
566 memcpy(ifp
->hw_addr
, LLADDR(sdl
),
568 ifp
->hw_addr_len
= sdl
->sdl_alen
;
575 * Interface structure exists. Adjust stored flags from
576 * notification. If interface has up->down or down->up
577 * transition, call state change routines (to adjust routes,
578 * notify routing daemons, etc.). (Other flag changes are stored
579 * but apparently do not trigger action.)
582 if (ifp
->ifindex
!= ifm
->ifm_index
) {
584 "%s: index mismatch, ifname %s, ifp index %d, "
586 __func__
, ifp
->name
, ifp
->ifindex
,
591 #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */
592 bsd_linkdetect_translate(ifm
);
593 #endif /* HAVE_BSD_IFI_LINK_STATE */
595 /* update flags and handle operative->inoperative transition, if
597 if_flags_update(ifp
, ifm
->ifm_flags
);
599 #ifndef RTM_IFANNOUNCE
600 if (!if_is_up(ifp
)) {
601 /* No RTM_IFANNOUNCE on this platform, so we can never
602 * distinguish between ~IFF_UP and delete. We must
604 * it has been deleted.
605 * Eg, Solaris will not notify us of unplumb.
607 * XXX: Fixme - this should be runtime detected
608 * So that a binary compiled on a system with IFANNOUNCE
609 * will still behave correctly if run on a platform
612 if_delete_update(ifp
);
614 #endif /* RTM_IFANNOUNCE */
616 #if defined(__bsdi__)
620 #endif /* __bsdi__ */
625 #ifdef HAVE_NET_RT_IFLIST
626 ifp
->stats
= ifm
->ifm_data
;
627 #endif /* HAVE_NET_RT_IFLIST */
629 if (IS_ZEBRA_DEBUG_KERNEL
)
630 zlog_debug("%s: interface %s index %d", __func__
, ifp
->name
,
636 /* Address read from struct ifa_msghdr. */
637 static void ifam_read_mesg(struct ifa_msghdr
*ifm
, union sockunion
*addr
,
638 union sockunion
*mask
, union sockunion
*brd
,
639 char *ifname
, short *ifnlen
)
643 union sockunion gateway
;
645 pnt
= (caddr_t
)(ifm
+ 1);
646 end
= ((caddr_t
)ifm
) + ifm
->ifam_msglen
;
648 /* Be sure structure is cleared */
649 memset(mask
, 0, sizeof(union sockunion
));
650 memset(addr
, 0, sizeof(union sockunion
));
651 memset(brd
, 0, sizeof(union sockunion
));
652 memset(&dst
, 0, sizeof(union sockunion
));
653 memset(&gateway
, 0, sizeof(union sockunion
));
655 /* We fetch each socket variable into sockunion. */
656 RTA_ADDR_GET(&dst
, RTA_DST
, ifm
->ifam_addrs
, pnt
);
657 RTA_ADDR_GET(&gateway
, RTA_GATEWAY
, ifm
->ifam_addrs
, pnt
);
658 RTA_ATTR_GET(mask
, RTA_NETMASK
, ifm
->ifam_addrs
, pnt
);
659 RTA_ADDR_GET(NULL
, RTA_GENMASK
, ifm
->ifam_addrs
, pnt
);
660 RTA_NAME_GET(ifname
, RTA_IFP
, ifm
->ifam_addrs
, pnt
, *ifnlen
);
661 RTA_ADDR_GET(addr
, RTA_IFA
, ifm
->ifam_addrs
, pnt
);
662 RTA_ADDR_GET(NULL
, RTA_AUTHOR
, ifm
->ifam_addrs
, pnt
);
663 RTA_ADDR_GET(brd
, RTA_BRD
, ifm
->ifam_addrs
, pnt
);
665 if (IS_ZEBRA_DEBUG_KERNEL
) {
666 int family
= sockunion_family(addr
);
670 char buf
[4][INET6_ADDRSTRLEN
];
672 "%s: ifindex %d, ifname %s, ifam_addrs 0x%x, "
673 "ifam_flags 0x%x, addr %s/%d broad %s dst %s "
675 __func__
, ifm
->ifam_index
,
676 (ifnlen
? ifname
: "(nil)"), ifm
->ifam_addrs
,
678 inet_ntop(family
, &addr
->sin
.sin_addr
, buf
[0],
680 ip_masklen(mask
->sin
.sin_addr
),
681 inet_ntop(family
, &brd
->sin
.sin_addr
, buf
[1],
683 inet_ntop(family
, &dst
.sin
.sin_addr
, buf
[2],
685 inet_ntop(family
, &gateway
.sin
.sin_addr
, buf
[3],
689 zlog_debug("%s: ifindex %d, ifname %s, ifam_addrs 0x%x",
690 __func__
, ifm
->ifam_index
,
691 (ifnlen
? ifname
: "(nil)"),
697 /* Assert read up end point matches to end point */
699 zlog_warn("ifam_read() doesn't read all socket data");
702 /* Interface's address information get. */
703 int ifam_read(struct ifa_msghdr
*ifam
)
705 struct interface
*ifp
= NULL
;
706 union sockunion addr
, mask
, brd
;
707 char ifname
[INTERFACE_NAMSIZ
];
712 ifname
[0] = ifname
[INTERFACE_NAMSIZ
- 1] = '\0';
714 /* Allocate and read address information. */
715 ifam_read_mesg(ifam
, &addr
, &mask
, &brd
, ifname
, &ifnlen
);
717 if ((ifp
= if_lookup_by_index(ifam
->ifam_index
, VRF_DEFAULT
)) == NULL
) {
718 zlog_warn("%s: no interface for ifname %s, index %d", __func__
,
719 ifname
, ifam
->ifam_index
);
723 if (ifnlen
&& strncmp(ifp
->name
, ifname
, INTERFACE_NAMSIZ
))
726 /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD
727 field contains a broadcast address or a peer address, so we are
729 rely upon the interface type. */
730 if (if_is_pointopoint(ifp
))
731 SET_FLAG(flags
, ZEBRA_IFA_PEER
);
734 /* it might seem cute to grab the interface metric here, however
735 * we're processing an address update message, and so some systems
736 * (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left
737 * in deliberately, as comment.
739 ifp
->metric
= ifam
->ifam_metric
;
742 /* Add connected address. */
743 switch (sockunion_family(&addr
)) {
745 if (ifam
->ifam_type
== RTM_NEWADDR
)
746 connected_add_ipv4(ifp
, flags
, &addr
.sin
.sin_addr
,
747 ip_masklen(mask
.sin
.sin_addr
),
749 (isalias
? ifname
: NULL
));
751 connected_delete_ipv4(ifp
, flags
, &addr
.sin
.sin_addr
,
752 ip_masklen(mask
.sin
.sin_addr
),
756 /* Unset interface index from link-local address when IPv6 stack
758 if (IN6_IS_ADDR_LINKLOCAL(&addr
.sin6
.sin6_addr
)) {
759 SET_IN6_LINKLOCAL_IFINDEX(addr
.sin6
.sin6_addr
, 0);
762 if (ifam
->ifam_type
== RTM_NEWADDR
)
763 connected_add_ipv6(ifp
, flags
, &addr
.sin6
.sin6_addr
,
764 ip6_masklen(mask
.sin6
.sin6_addr
),
766 (isalias
? ifname
: NULL
));
768 connected_delete_ipv6(ifp
, &addr
.sin6
.sin6_addr
,
769 ip6_masklen(mask
.sin6
.sin6_addr
),
770 &brd
.sin6
.sin6_addr
);
773 /* Unsupported family silently ignore... */
777 /* Check interface flag for implicit up of the interface. */
781 /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange.
782 * See comments for SUNOS_5 in interface.c::if_flags_mangle.
784 * Here we take care of case where the real IFF_UP was previously
785 * unset (as kept in struct zebra_if.primary_state) and the mangled
786 * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned
787 * to unset due to the lost non-primary address having DELADDR'd.
789 * we must delete the interface, because in between here and next
790 * event for this interface-name the administrator could unplumb
791 * and replumb the interface.
794 if_delete_update(ifp
);
800 /* Interface function for reading kernel routing table information. */
801 static int rtm_read_mesg(struct rt_msghdr
*rtm
, union sockunion
*dest
,
802 union sockunion
*mask
, union sockunion
*gate
,
803 char *ifname
, short *ifnlen
)
807 /* Pnt points out socket data start point. */
808 pnt
= (caddr_t
)(rtm
+ 1);
809 end
= ((caddr_t
)rtm
) + rtm
->rtm_msglen
;
811 /* rt_msghdr version check. */
812 if (rtm
->rtm_version
!= RTM_VERSION
)
814 "Routing message version different %d should be %d."
815 "This may cause problem\n",
816 rtm
->rtm_version
, RTM_VERSION
);
818 /* Be sure structure is cleared */
819 memset(dest
, 0, sizeof(union sockunion
));
820 memset(gate
, 0, sizeof(union sockunion
));
821 memset(mask
, 0, sizeof(union sockunion
));
823 /* We fetch each socket variable into sockunion. */
824 RTA_ADDR_GET(dest
, RTA_DST
, rtm
->rtm_addrs
, pnt
);
825 RTA_ADDR_GET(gate
, RTA_GATEWAY
, rtm
->rtm_addrs
, pnt
);
826 RTA_ATTR_GET(mask
, RTA_NETMASK
, rtm
->rtm_addrs
, pnt
);
827 RTA_ADDR_GET(NULL
, RTA_GENMASK
, rtm
->rtm_addrs
, pnt
);
828 RTA_NAME_GET(ifname
, RTA_IFP
, rtm
->rtm_addrs
, pnt
, *ifnlen
);
829 RTA_ADDR_GET(NULL
, RTA_IFA
, rtm
->rtm_addrs
, pnt
);
830 RTA_ADDR_GET(NULL
, RTA_AUTHOR
, rtm
->rtm_addrs
, pnt
);
831 RTA_ADDR_GET(NULL
, RTA_BRD
, rtm
->rtm_addrs
, pnt
);
833 /* If there is netmask information set it's family same as
835 if (rtm
->rtm_addrs
& RTA_NETMASK
)
836 mask
->sa
.sa_family
= dest
->sa
.sa_family
;
838 /* Assert read up to the end of pointer. */
840 zlog_warn("rtm_read() doesn't read all socket data.");
842 return rtm
->rtm_flags
;
845 void rtm_read(struct rt_msghdr
*rtm
)
849 union sockunion dest
, mask
, gate
;
850 char ifname
[INTERFACE_NAMSIZ
+ 1];
855 /* Read destination and netmask and gateway from rtm message
857 flags
= rtm_read_mesg(rtm
, &dest
, &mask
, &gate
, ifname
, &ifnlen
);
858 if (!(flags
& RTF_DONE
))
860 if (IS_ZEBRA_DEBUG_KERNEL
)
861 zlog_debug("%s: got rtm of type %d (%s)", __func__
,
863 lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
));
865 #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/
866 if (flags
& RTF_CLONED
)
869 #ifdef RTF_WASCLONED /*freebsd*/
870 if (flags
& RTF_WASCLONED
)
874 if ((rtm
->rtm_type
== RTM_ADD
|| rtm
->rtm_type
== RTM_CHANGE
)
875 && !(flags
& RTF_UP
))
878 /* This is connected route. */
879 if (!(flags
& RTF_GATEWAY
))
882 if (flags
& RTF_PROTO1
)
883 SET_FLAG(zebra_flags
, ZEBRA_FLAG_SELFROUTE
);
885 /* This is persistent route. */
886 if (flags
& RTF_STATIC
)
887 SET_FLAG(zebra_flags
, ZEBRA_FLAG_STATIC
);
889 /* This is a reject or blackhole route */
890 if (flags
& RTF_REJECT
)
891 SET_FLAG(zebra_flags
, ZEBRA_FLAG_REJECT
);
892 if (flags
& RTF_BLACKHOLE
)
893 SET_FLAG(zebra_flags
, ZEBRA_FLAG_BLACKHOLE
);
895 if (dest
.sa
.sa_family
== AF_INET
) {
899 p
.u
.prefix4
= dest
.sin
.sin_addr
;
900 if (flags
& RTF_HOST
)
901 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
903 p
.prefixlen
= ip_masklen(mask
.sin
.sin_addr
);
905 /* Catch self originated messages and match them against our
907 * At the same time, ignore unconfirmed messages, they should be
909 * by rtm_write() and kernel_rtm_ipv4().
911 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
) {
912 char buf
[PREFIX_STRLEN
], gate_buf
[INET_ADDRSTRLEN
];
914 if (!IS_ZEBRA_DEBUG_RIB
)
916 ret
= rib_lookup_ipv4_route((struct prefix_ipv4
*)&p
,
918 prefix2str(&p
, buf
, sizeof(buf
));
919 switch (rtm
->rtm_type
) {
923 /* The kernel notifies us about a new route in
925 Do we have a correspondent entry in our RIB?
928 case ZEBRA_RIB_NOTFOUND
:
930 "%s: %s %s: desync: RR isn't yet in RIB, while already in FIB",
932 lookup_msg(rtm_type_str
,
933 rtm
->rtm_type
, NULL
),
936 case ZEBRA_RIB_FOUND_CONNECTED
:
937 case ZEBRA_RIB_FOUND_NOGATE
:
938 inet_ntop(AF_INET
, &gate
.sin
.sin_addr
,
939 gate_buf
, INET_ADDRSTRLEN
);
941 "%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)",
943 lookup_msg(rtm_type_str
,
944 rtm
->rtm_type
, NULL
),
947 case ZEBRA_RIB_FOUND_EXACT
: /* RIB RR == FIB RR
950 "%s: %s %s: done Ok", __func__
,
951 lookup_msg(rtm_type_str
,
952 rtm
->rtm_type
, NULL
),
955 (struct prefix_ipv4
*)&p
,
962 /* The kernel notifies us about a route deleted
964 have it in the RIB? Do we have anything
967 case ZEBRA_RIB_FOUND_EXACT
:
969 "%s: %s %s: desync: RR is still in RIB, while already not in FIB",
971 lookup_msg(rtm_type_str
,
972 rtm
->rtm_type
, NULL
),
975 (struct prefix_ipv4
*)&p
,
978 case ZEBRA_RIB_FOUND_CONNECTED
:
979 case ZEBRA_RIB_FOUND_NOGATE
:
981 "%s: %s %s: desync: RR is still in RIB, plus gate differs",
983 lookup_msg(rtm_type_str
,
984 rtm
->rtm_type
, NULL
),
987 (struct prefix_ipv4
*)&p
,
990 case ZEBRA_RIB_NOTFOUND
: /* RIB RR == FIB RR */
992 "%s: %s %s: done Ok", __func__
,
993 lookup_msg(rtm_type_str
,
994 rtm
->rtm_type
, NULL
),
997 (struct prefix_ipv4
*)&p
,
1005 "%s: %s: warning: loopback RTM of type %s received",
1007 lookup_msg(rtm_type_str
, rtm
->rtm_type
,
1013 /* Change, delete the old prefix, we have no further information
1014 * to specify the route really
1016 if (rtm
->rtm_type
== RTM_CHANGE
)
1017 rib_delete(AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
,
1018 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1021 union g_addr ggate
= {.ipv4
= gate
.sin
.sin_addr
};
1022 if (rtm
->rtm_type
== RTM_GET
|| rtm
->rtm_type
== RTM_ADD
1023 || rtm
->rtm_type
== RTM_CHANGE
)
1024 rib_add(AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
,
1025 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1026 &ggate
, NULL
, 0, 0, 0, 0, 0);
1028 rib_delete(AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
,
1029 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1032 if (dest
.sa
.sa_family
== AF_INET6
) {
1033 /* One day we might have a debug section here like one in the
1034 * IPv4 case above. Just ignore own messages at the moment.
1036 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
)
1039 ifindex_t ifindex
= 0;
1041 p
.family
= AF_INET6
;
1042 p
.u
.prefix6
= dest
.sin6
.sin6_addr
;
1043 if (flags
& RTF_HOST
)
1044 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
1046 p
.prefixlen
= ip6_masklen(mask
.sin6
.sin6_addr
);
1049 if (IN6_IS_ADDR_LINKLOCAL(&gate
.sin6
.sin6_addr
)) {
1050 ifindex
= IN6_LINKLOCAL_IFINDEX(gate
.sin6
.sin6_addr
);
1051 SET_IN6_LINKLOCAL_IFINDEX(gate
.sin6
.sin6_addr
, 0);
1055 /* CHANGE: delete the old prefix, we have no further information
1056 * to specify the route really
1058 if (rtm
->rtm_type
== RTM_CHANGE
)
1059 rib_delete(AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
,
1060 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1063 union g_addr ggate
= {.ipv6
= gate
.sin6
.sin6_addr
};
1064 if (rtm
->rtm_type
== RTM_GET
|| rtm
->rtm_type
== RTM_ADD
1065 || rtm
->rtm_type
== RTM_CHANGE
)
1066 rib_add(AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
,
1067 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1068 &ggate
, NULL
, ifindex
, 0, 0, 0, 0);
1070 rib_delete(AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
,
1071 ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
, &p
, NULL
,
1072 &ggate
, ifindex
, 0);
1076 /* Interface function for the kernel routing table updates. Support
1077 * for RTM_CHANGE will be needed.
1078 * Exported only for rt_socket.c
1080 int rtm_write(int message
, union sockunion
*dest
, union sockunion
*mask
,
1081 union sockunion
*gate
, union sockunion
*mpls
, unsigned int index
,
1082 int zebra_flags
, int metric
)
1086 struct interface
*ifp
;
1088 /* Sequencial number of routing message. */
1089 static int msg_seq
= 0;
1091 /* Struct of rt_msghdr and buffer for storing socket's data. */
1093 struct rt_msghdr rtm
;
1097 if (routing_sock
< 0)
1098 return ZEBRA_ERR_EPERM
;
1100 /* Clear and set rt_msghdr values */
1101 memset(&msg
, 0, sizeof(struct rt_msghdr
));
1102 msg
.rtm
.rtm_version
= RTM_VERSION
;
1103 msg
.rtm
.rtm_type
= message
;
1104 msg
.rtm
.rtm_seq
= msg_seq
++;
1105 msg
.rtm
.rtm_addrs
= RTA_DST
;
1106 msg
.rtm
.rtm_addrs
|= RTA_GATEWAY
;
1107 msg
.rtm
.rtm_flags
= RTF_UP
;
1109 msg
.rtm
.rtm_flags
|= RTF_MPATH
;
1110 msg
.rtm
.rtm_fmask
= RTF_MPLS
;
1112 msg
.rtm
.rtm_index
= index
;
1115 msg
.rtm
.rtm_rmx
.rmx_hopcount
= metric
;
1116 msg
.rtm
.rtm_inits
|= RTV_HOPCOUNT
;
1119 ifp
= if_lookup_by_index(index
, VRF_DEFAULT
);
1121 if (gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
))
1122 msg
.rtm
.rtm_flags
|= RTF_GATEWAY
;
1124 /* When RTF_CLONING is unavailable on BSD, should we set some
1125 * other flag instead?
1128 if (!gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
) && ifp
1129 && (ifp
->flags
& IFF_POINTOPOINT
) == 0)
1130 msg
.rtm
.rtm_flags
|= RTF_CLONING
;
1131 #endif /* RTF_CLONING */
1133 /* If no protocol specific gateway is specified, use link
1134 address for gateway. */
1137 char dest_buf
[INET_ADDRSTRLEN
] = "NULL",
1138 mask_buf
[INET_ADDRSTRLEN
] = "255.255.255.255";
1140 inet_ntop(AF_INET
, &dest
->sin
.sin_addr
,
1141 dest_buf
, INET_ADDRSTRLEN
);
1143 inet_ntop(AF_INET
, &mask
->sin
.sin_addr
,
1144 mask_buf
, INET_ADDRSTRLEN
);
1146 "%s: %s/%s: gate == NULL and no gateway found for ifindex %d",
1147 __func__
, dest_buf
, mask_buf
, index
);
1150 gate
= (union sockunion
*)&((struct zebra_if
*)ifp
->info
)->sdl
;
1154 msg
.rtm
.rtm_addrs
|= RTA_NETMASK
;
1155 else if (message
== RTM_ADD
|| message
== RTM_CHANGE
)
1156 msg
.rtm
.rtm_flags
|= RTF_HOST
;
1160 msg
.rtm
.rtm_addrs
|= RTA_SRC
;
1161 msg
.rtm
.rtm_flags
|= RTF_MPLS
;
1163 if (mpls
->smpls
.smpls_label
1164 != htonl(MPLS_IMP_NULL_LABEL
<< MPLS_LABEL_OFFSET
))
1165 msg
.rtm
.rtm_mpls
= MPLS_OP_PUSH
;
1169 /* Tagging route with flags */
1170 msg
.rtm
.rtm_flags
|= (RTF_PROTO1
);
1172 /* Additional flags. */
1173 if (zebra_flags
& ZEBRA_FLAG_BLACKHOLE
)
1174 msg
.rtm
.rtm_flags
|= RTF_BLACKHOLE
;
1175 if (zebra_flags
& ZEBRA_FLAG_REJECT
)
1176 msg
.rtm
.rtm_flags
|= RTF_REJECT
;
1179 #define SOCKADDRSET(X, R) \
1180 if (msg.rtm.rtm_addrs & (R)) { \
1181 int len = SAROUNDUP(X); \
1182 memcpy(pnt, (caddr_t)(X), len); \
1186 pnt
= (caddr_t
)msg
.buf
;
1188 /* Write each socket data into rtm message buffer */
1189 SOCKADDRSET(dest
, RTA_DST
);
1190 SOCKADDRSET(gate
, RTA_GATEWAY
);
1191 SOCKADDRSET(mask
, RTA_NETMASK
);
1193 SOCKADDRSET(mpls
, RTA_SRC
);
1196 msg
.rtm
.rtm_msglen
= pnt
- (caddr_t
)&msg
;
1198 ret
= write(routing_sock
, &msg
, msg
.rtm
.rtm_msglen
);
1200 if (ret
!= msg
.rtm
.rtm_msglen
) {
1201 if (errno
== EEXIST
)
1202 return ZEBRA_ERR_RTEXIST
;
1203 if (errno
== ENETUNREACH
)
1204 return ZEBRA_ERR_RTUNREACH
;
1206 return ZEBRA_ERR_RTNOEXIST
;
1208 zlog_warn("%s: write : %s (%d)", __func__
, safe_strerror(errno
),
1210 return ZEBRA_ERR_KERNEL
;
1212 return ZEBRA_ERR_NOERROR
;
1217 #include "zebra/zserv.h"
1219 /* For debug purpose. */
1220 static void rtmsg_debug(struct rt_msghdr
*rtm
)
1222 zlog_debug("Kernel: Len: %d Type: %s", rtm
->rtm_msglen
,
1223 lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
));
1224 rtm_flag_dump(rtm
->rtm_flags
);
1225 zlog_debug("Kernel: message seq %d", rtm
->rtm_seq
);
1226 zlog_debug("Kernel: pid %lld, rtm_addrs 0x%x", (long long)rtm
->rtm_pid
,
1230 /* This is pretty gross, better suggestions welcome -- mhandler */
1233 #define RTAX_MAX RTA_NUMBITS
1236 #endif /* RTA_NUMBITS */
1237 #endif /* RTAX_MAX */
1239 /* Kernel routing table and interface updates via routing socket. */
1240 static int kernel_read(struct thread
*thread
)
1244 struct rt_msghdr
*rtm
;
1247 * This must be big enough for any message the kernel might send.
1248 * Rather than determining how many sockaddrs of what size might be
1249 * in each particular message, just use RTAX_MAX of sockaddr_storage
1250 * for each. Note that the sockaddrs must be after each message
1251 * definition, or rather after whichever happens to be the largest,
1252 * since the buffer needs to be big enough for a message and the
1253 * sockaddrs together.
1256 /* Routing information. */
1258 struct rt_msghdr rtm
;
1259 struct sockaddr_storage addr
[RTAX_MAX
];
1262 /* Interface information. */
1264 struct if_msghdr ifm
;
1265 struct sockaddr_storage addr
[RTAX_MAX
];
1268 /* Interface address information. */
1270 struct ifa_msghdr ifa
;
1271 struct sockaddr_storage addr
[RTAX_MAX
];
1274 #ifdef RTM_IFANNOUNCE
1275 /* Interface arrival/departure */
1277 struct if_announcemsghdr ifan
;
1278 struct sockaddr_storage addr
[RTAX_MAX
];
1280 #endif /* RTM_IFANNOUNCE */
1284 /* Fetch routing socket. */
1285 sock
= THREAD_FD(thread
);
1287 nbytes
= read(sock
, &buf
, sizeof buf
);
1290 if (nbytes
< 0 && errno
!= EWOULDBLOCK
&& errno
!= EAGAIN
)
1291 zlog_warn("routing socket error: %s",
1292 safe_strerror(errno
));
1296 thread_add_read(zebrad
.master
, kernel_read
, NULL
, sock
, NULL
);
1298 if (IS_ZEBRA_DEBUG_KERNEL
)
1299 rtmsg_debug(&buf
.r
.rtm
);
1304 * Ensure that we didn't drop any data, so that processing routines
1305 * can assume they have the whole message.
1307 if (rtm
->rtm_msglen
!= nbytes
) {
1309 "kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n",
1310 rtm
->rtm_msglen
, nbytes
, rtm
->rtm_type
);
1314 switch (rtm
->rtm_type
) {
1321 ifm_read(&buf
.im
.ifm
);
1325 ifam_read(&buf
.ia
.ifa
);
1327 #ifdef RTM_IFANNOUNCE
1328 case RTM_IFANNOUNCE
:
1329 ifan_read(&buf
.ian
.ifan
);
1331 #endif /* RTM_IFANNOUNCE */
1333 if (IS_ZEBRA_DEBUG_KERNEL
)
1334 zlog_debug("Unprocessed RTM_type: %d", rtm
->rtm_type
);
1340 /* Make routing socket. */
1341 static void routing_socket(struct zebra_ns
*zns
)
1343 if (zserv_privs
.change(ZPRIVS_RAISE
))
1344 zlog_err("routing_socket: Can't raise privileges");
1346 routing_sock
= socket(AF_ROUTE
, SOCK_RAW
, 0);
1348 if (routing_sock
< 0) {
1349 if (zserv_privs
.change(ZPRIVS_LOWER
))
1350 zlog_err("routing_socket: Can't lower privileges");
1351 zlog_warn("Can't init kernel routing socket");
1355 /* XXX: Socket should be NONBLOCK, however as we currently
1356 * discard failed writes, this will lead to inconsistencies.
1357 * For now, socket must be blocking.
1359 /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0)
1360 zlog_warn ("Can't set O_NONBLOCK to routing socket");*/
1362 if (zserv_privs
.change(ZPRIVS_LOWER
))
1363 zlog_err("routing_socket: Can't lower privileges");
1365 /* kernel_read needs rewrite. */
1366 thread_add_read(zebrad
.master
, kernel_read
, NULL
, routing_sock
, NULL
);
1369 /* Exported interface function. This function simply calls
1370 routing_socket (). */
1371 void kernel_init(struct zebra_ns
*zns
)
1373 routing_socket(zns
);
1376 void kernel_terminate(struct zebra_ns
*zns
)