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.
93 #warning "net/route.h does not define RT_ROUNDUP; making unwarranted assumptions!"
95 /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */
97 #define ROUNDUP_TYPE int
99 #define ROUNDUP_TYPE long
103 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(ROUNDUP_TYPE) - 1))) : sizeof(ROUNDUP_TYPE))
105 #endif /* defined(ROUNDUP) */
108 * Given a pointer (sockaddr or void *), return the number of bytes
109 * taken up by the sockaddr and any padding needed for alignment.
111 #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
112 #define SAROUNDUP(X) ROUNDUP(((struct sockaddr *)(X))->sa_len)
115 * One would hope all fixed-size structure definitions are aligned,
116 * but round them up nonetheless.
118 #define SAROUNDUP(X) \
119 (((struct sockaddr *)(X))->sa_family == AF_INET ? \
120 ROUNDUP(sizeof(struct sockaddr_in)):\
121 (((struct sockaddr *)(X))->sa_family == AF_INET6 ? \
122 ROUNDUP(sizeof(struct sockaddr_in6)) : \
123 (((struct sockaddr *)(X))->sa_family == AF_LINK ? \
124 ROUNDUP(sizeof(struct sockaddr_dl)) : sizeof(struct sockaddr))))
125 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
127 #endif /* !SA_SIZE */
130 * We use a call to an inline function to copy (PNT) to (DEST)
131 * 1. Calculating the length of the copy requires an #ifdef to determine
132 * if sa_len is a field and can't be used directly inside a #define
133 * 2. So the compiler doesn't complain when DEST is NULL, which is only true
134 * when we are skipping the copy and incrementing to the next SA
137 rta_copy (union sockunion
*dest
, caddr_t src
) {
141 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
142 len
= (((struct sockaddr
*)src
)->sa_len
> sizeof (*dest
)) ?
143 sizeof (*dest
) : ((struct sockaddr
*)src
)->sa_len
;
145 len
= (SAROUNDUP (src
) > sizeof (*dest
)) ?
146 sizeof (*dest
) : SAROUNDUP (src
) ;
148 memcpy (dest
, src
, len
);
151 #define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \
152 if ((RTMADDRS) & (RTA)) \
154 int len = SAROUNDUP ((PNT)); \
155 if (af_check (((struct sockaddr *)(PNT))->sa_family)) \
156 rta_copy((DEST), (PNT)); \
159 #define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \
160 if ((RTMADDRS) & (RTA)) \
162 int len = SAROUNDUP ((PNT)); \
163 rta_copy((DEST), (PNT)); \
167 #define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \
168 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) ) \
179 memcpy (pdest, sdl->sdl_data, sdl->sdl_nlen); \
180 pdest[sdl->sdl_nlen] = '\0'; \
181 (LEN) = sdl->sdl_nlen; \
189 /* Routing socket message types. */
190 const struct message rtm_type_str
[] =
192 {RTM_ADD
, "RTM_ADD"},
193 {RTM_DELETE
, "RTM_DELETE"},
194 {RTM_CHANGE
, "RTM_CHANGE"},
195 {RTM_GET
, "RTM_GET"},
196 {RTM_LOSING
, "RTM_LOSING"},
197 {RTM_REDIRECT
, "RTM_REDIRECT"},
198 {RTM_MISS
, "RTM_MISS"},
199 {RTM_LOCK
, "RTM_LOCK"},
201 {RTM_OLDADD
, "RTM_OLDADD"},
202 #endif /* RTM_OLDADD */
204 {RTM_OLDDEL
, "RTM_OLDDEL"},
205 #endif /* RTM_OLDDEL */
206 {RTM_RESOLVE
, "RTM_RESOLVE"},
207 {RTM_NEWADDR
, "RTM_NEWADDR"},
208 {RTM_DELADDR
, "RTM_DELADDR"},
209 {RTM_IFINFO
, "RTM_IFINFO"},
211 {RTM_OIFINFO
, "RTM_OIFINFO"},
212 #endif /* RTM_OIFINFO */
214 {RTM_NEWMADDR
, "RTM_NEWMADDR"},
215 #endif /* RTM_NEWMADDR */
217 {RTM_DELMADDR
, "RTM_DELMADDR"},
218 #endif /* RTM_DELMADDR */
219 #ifdef RTM_IFANNOUNCE
220 {RTM_IFANNOUNCE
, "RTM_IFANNOUNCE"},
221 #endif /* RTM_IFANNOUNCE */
225 static const struct message rtm_flag_str
[] =
228 {RTF_GATEWAY
, "GATEWAY"},
230 {RTF_REJECT
, "REJECT"},
231 {RTF_DYNAMIC
, "DYNAMIC"},
232 {RTF_MODIFIED
, "MODIFIED"},
236 #endif /* RTF_MASK */
238 {RTF_CLONING
, "CLONING"},
239 #endif /* RTF_CLONING */
241 {RTF_XRESOLVE
, "XRESOLVE"},
242 #endif /* RTF_XRESOLVE */
244 {RTF_LLINFO
, "LLINFO"},
245 #endif /* RTF_LLINFO */
246 {RTF_STATIC
, "STATIC"},
247 {RTF_BLACKHOLE
, "BLACKHOLE"},
249 {RTF_PRIVATE
, "PRIVATE"},
250 #endif /* RTF_PRIVATE */
251 {RTF_PROTO1
, "PROTO1"},
252 {RTF_PROTO2
, "PROTO2"},
254 {RTF_PRCLONING
, "PRCLONING"},
255 #endif /* RTF_PRCLONING */
257 {RTF_WASCLONED
, "WASCLONED"},
258 #endif /* RTF_WASCLONED */
260 {RTF_PROTO3
, "PROTO3"},
261 #endif /* RTF_PROTO3 */
263 {RTF_PINNED
, "PINNED"},
264 #endif /* RTF_PINNED */
266 {RTF_LOCAL
, "LOCAL"},
267 #endif /* RTF_LOCAL */
269 {RTF_BROADCAST
, "BROADCAST"},
270 #endif /* RTF_BROADCAST */
272 {RTF_MULTICAST
, "MULTICAST"},
273 #endif /* RTF_MULTICAST */
275 {RTF_MULTIRT
, "MULTIRT"},
276 #endif /* RTF_MULTIRT */
278 {RTF_SETSRC
, "SETSRC"},
279 #endif /* RTF_SETSRC */
283 /* Kernel routing update socket. */
284 int routing_sock
= -1;
286 /* Yes I'm checking ugly routing socket behavior. */
289 /* Supported address family check. */
291 af_check (int family
)
293 if (family
== AF_INET
)
295 if (family
== AF_INET6
)
300 /* Dump routing table flag for debug purpose. */
302 rtm_flag_dump (int flag
)
304 const struct message
*mes
;
305 static char buf
[BUFSIZ
];
308 for (mes
= rtm_flag_str
; mes
->key
!= 0; mes
++)
312 strlcat (buf
, mes
->str
, BUFSIZ
);
313 strlcat (buf
, " ", BUFSIZ
);
316 zlog_debug ("Kernel: %s", buf
);
319 #ifdef RTM_IFANNOUNCE
320 /* Interface adding function */
322 ifan_read (struct if_announcemsghdr
*ifan
)
324 struct interface
*ifp
;
326 ifp
= if_lookup_by_index (ifan
->ifan_index
, VRF_DEFAULT
);
329 assert ( (ifp
->ifindex
== ifan
->ifan_index
)
330 || (ifp
->ifindex
== IFINDEX_INTERNAL
) );
333 || ((ifp
->ifindex
== IFINDEX_INTERNAL
)
334 && (ifan
->ifan_what
== IFAN_ARRIVAL
)) )
336 if (IS_ZEBRA_DEBUG_KERNEL
)
337 zlog_debug ("%s: creating interface for ifindex %d, name %s",
338 __func__
, ifan
->ifan_index
, ifan
->ifan_name
);
340 /* Create Interface */
341 ifp
= if_get_by_name_len(ifan
->ifan_name
,
342 strnlen(ifan
->ifan_name
,
343 sizeof(ifan
->ifan_name
)),
345 ifp
->ifindex
= ifan
->ifan_index
;
350 else if (ifp
!= NULL
&& ifan
->ifan_what
== IFAN_DEPARTURE
)
351 if_delete_update (ifp
);
357 if (IS_ZEBRA_DEBUG_KERNEL
)
358 zlog_debug ("%s: interface %s index %d",
359 __func__
, ifan
->ifan_name
, ifan
->ifan_index
);
363 #endif /* RTM_IFANNOUNCE */
365 #ifdef HAVE_BSD_IFI_LINK_STATE
366 /* BSD link detect translation */
368 bsd_linkdetect_translate (struct if_msghdr
*ifm
)
370 if ((ifm
->ifm_data
.ifi_link_state
>= LINK_STATE_UP
) ||
371 (ifm
->ifm_data
.ifi_link_state
== LINK_STATE_UNKNOWN
))
372 SET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
374 UNSET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
376 #endif /* HAVE_BSD_IFI_LINK_STATE */
378 static enum zebra_link_type
379 sdl_to_zebra_link_type (unsigned int sdlt
)
383 case IFT_ETHER
: return ZEBRA_LLT_ETHER
;
384 case IFT_X25
: return ZEBRA_LLT_X25
;
385 case IFT_FDDI
: return ZEBRA_LLT_FDDI
;
386 case IFT_PPP
: return ZEBRA_LLT_PPP
;
387 case IFT_LOOP
: return ZEBRA_LLT_LOOPBACK
;
388 case IFT_SLIP
: return ZEBRA_LLT_SLIP
;
389 case IFT_ARCNET
: return ZEBRA_LLT_ARCNET
;
390 case IFT_ATM
: return ZEBRA_LLT_ATM
;
391 case IFT_LOCALTALK
: return ZEBRA_LLT_LOCALTLK
;
392 case IFT_HIPPI
: return ZEBRA_LLT_HIPPI
;
394 case IFT_IEEE1394
: return ZEBRA_LLT_IEEE1394
;
397 default: return ZEBRA_LLT_UNKNOWN
;
402 * Handle struct if_msghdr obtained from reading routing socket or
403 * sysctl (from interface_list). There may or may not be sockaddrs
404 * present after the header.
407 ifm_read (struct if_msghdr
*ifm
)
409 struct interface
*ifp
= NULL
;
410 struct sockaddr_dl
*sdl
;
411 char ifname
[IFNAMSIZ
];
415 /* terminate ifname at head (for strnlen) and tail (for safety) */
416 ifname
[IFNAMSIZ
- 1] = '\0';
418 /* paranoia: sanity check structure */
419 if (ifm
->ifm_msglen
< sizeof(struct if_msghdr
))
421 zlog_err ("ifm_read: ifm->ifm_msglen %d too short\n",
427 * Check for a sockaddr_dl following the message. First, point to
428 * where a socakddr might be if one follows the message.
430 cp
= (void *)(ifm
+ 1);
434 * XXX This behavior should be narrowed to only the kernel versions
435 * for which the structures returned do not match the headers.
437 * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions
438 * is 12 bytes larger than the 32 bit version.
440 if (((struct sockaddr
*) cp
)->sa_family
== AF_UNSPEC
)
444 RTA_ADDR_GET (NULL
, RTA_DST
, ifm
->ifm_addrs
, cp
);
445 RTA_ADDR_GET (NULL
, RTA_GATEWAY
, ifm
->ifm_addrs
, cp
);
446 RTA_ATTR_GET (NULL
, RTA_NETMASK
, ifm
->ifm_addrs
, cp
);
447 RTA_ADDR_GET (NULL
, RTA_GENMASK
, ifm
->ifm_addrs
, cp
);
448 sdl
= (struct sockaddr_dl
*)cp
;
449 RTA_NAME_GET (ifname
, RTA_IFP
, ifm
->ifm_addrs
, cp
, ifnlen
);
450 RTA_ADDR_GET (NULL
, RTA_IFA
, ifm
->ifm_addrs
, cp
);
451 RTA_ADDR_GET (NULL
, RTA_AUTHOR
, ifm
->ifm_addrs
, cp
);
452 RTA_ADDR_GET (NULL
, RTA_BRD
, ifm
->ifm_addrs
, cp
);
454 if (IS_ZEBRA_DEBUG_KERNEL
)
455 zlog_debug ("%s: sdl ifname %s", __func__
, (ifnlen
? ifname
: "(nil)"));
458 * Look up on ifindex first, because ifindices are the primary handle for
459 * interfaces across the user/kernel boundary, for most systems. (Some
460 * messages, such as up/down status changes on NetBSD, do not include a
463 if ( (ifp
= if_lookup_by_index (ifm
->ifm_index
, VRF_DEFAULT
)) != NULL
)
465 /* we have an ifp, verify that the name matches as some systems,
466 * eg Solaris, have a 1:many association of ifindex:ifname
467 * if they dont match, we dont have the correct ifp and should
468 * set it back to NULL to let next check do lookup by name
470 if (ifnlen
&& (strncmp (ifp
->name
, ifname
, IFNAMSIZ
) != 0) )
472 if (IS_ZEBRA_DEBUG_KERNEL
)
473 zlog_debug ("%s: ifp name %s doesnt match sdl name %s",
474 __func__
, ifp
->name
, ifname
);
480 * If we dont have an ifp, try looking up by name. Particularly as some
481 * systems (Solaris) have a 1:many mapping of ifindex:ifname - the ifname
482 * is therefore our unique handle to that interface.
484 * Interfaces specified in the configuration file for which the ifindex
485 * has not been determined will have ifindex == IFINDEX_INTERNAL, and such
486 * interfaces are found by this search, and then their ifindex values can
489 if ( (ifp
== NULL
) && ifnlen
)
490 ifp
= if_lookup_by_name (ifname
, VRF_DEFAULT
);
493 * If ifp still does not exist or has an invalid index (IFINDEX_INTERNAL),
494 * create or fill in an interface.
496 if ((ifp
== NULL
) || (ifp
->ifindex
== IFINDEX_INTERNAL
))
499 * To create or fill in an interface, a sockaddr_dl (via
500 * RTA_IFP) is required.
504 zlog_warn ("Interface index %d (new) missing ifname\n",
509 #ifndef RTM_IFANNOUNCE
510 /* Down->Down interface should be ignored here.
511 * See further comment below.
513 if (!CHECK_FLAG (ifm
->ifm_flags
, IFF_UP
))
515 #endif /* !RTM_IFANNOUNCE */
519 /* Interface that zebra was not previously aware of, so create. */
520 ifp
= if_create (ifname
, ifnlen
, VRF_DEFAULT
);
521 if (IS_ZEBRA_DEBUG_KERNEL
)
522 zlog_debug ("%s: creating ifp for ifindex %d",
523 __func__
, ifm
->ifm_index
);
526 if (IS_ZEBRA_DEBUG_KERNEL
)
527 zlog_debug ("%s: updated/created ifp, ifname %s, ifindex %d",
528 __func__
, ifp
->name
, ifp
->ifindex
);
530 * Fill in newly created interface structure, or larval
531 * structure with ifindex IFINDEX_INTERNAL.
533 ifp
->ifindex
= ifm
->ifm_index
;
535 #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */
536 bsd_linkdetect_translate(ifm
);
537 #endif /* HAVE_BSD_IFI_LINK_STATE */
539 if_flags_update (ifp
, ifm
->ifm_flags
);
540 #if defined(__bsdi__)
541 if_kvm_get_mtu (ifp
);
544 #endif /* __bsdi__ */
548 * XXX sockaddr_dl contents can be larger than the structure
549 * definition. There are 2 big families here:
550 * - BSD has sdl_len + sdl_data[16] + overruns sdl_data
551 * we MUST use sdl_len here or we'll truncate data.
552 * - Solaris has no sdl_len, but sdl_data[244]
553 * presumably, it's not going to run past that, so sizeof()
555 * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid
557 ifp
->ll_type
= ZEBRA_LLT_UNKNOWN
;
558 ifp
->hw_addr_len
= 0;
561 #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN
562 memcpy (&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
, sdl
->sdl_len
);
564 memcpy (&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
, sizeof (struct sockaddr_dl
));
565 #endif /* HAVE_STRUCT_SOCKADDR_DL_SDL_LEN */
567 ifp
->ll_type
= sdl_to_zebra_link_type (sdl
->sdl_type
);
568 if (sdl
->sdl_alen
<= sizeof(ifp
->hw_addr
))
570 memcpy (ifp
->hw_addr
, LLADDR(sdl
), sdl
->sdl_alen
);
571 ifp
->hw_addr_len
= sdl
->sdl_alen
;
579 * Interface structure exists. Adjust stored flags from
580 * notification. If interface has up->down or down->up
581 * transition, call state change routines (to adjust routes,
582 * notify routing daemons, etc.). (Other flag changes are stored
583 * but apparently do not trigger action.)
586 if (ifp
->ifindex
!= ifm
->ifm_index
)
588 zlog_warn ("%s: index mismatch, ifname %s, ifp index %d, "
590 __func__
, ifp
->name
, ifp
->ifindex
, ifm
->ifm_index
);
594 #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */
595 bsd_linkdetect_translate(ifm
);
596 #endif /* HAVE_BSD_IFI_LINK_STATE */
598 /* update flags and handle operative->inoperative transition, if any */
599 if_flags_update (ifp
, ifm
->ifm_flags
);
601 #ifndef RTM_IFANNOUNCE
604 /* No RTM_IFANNOUNCE on this platform, so we can never
605 * distinguish between ~IFF_UP and delete. We must presume
606 * it has been deleted.
607 * Eg, Solaris will not notify us of unplumb.
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 without
613 if_delete_update (ifp
);
615 #endif /* RTM_IFANNOUNCE */
618 #if defined(__bsdi__)
619 if_kvm_get_mtu (ifp
);
622 #endif /* __bsdi__ */
627 #ifdef HAVE_NET_RT_IFLIST
628 ifp
->stats
= ifm
->ifm_data
;
629 #endif /* HAVE_NET_RT_IFLIST */
631 if (IS_ZEBRA_DEBUG_KERNEL
)
632 zlog_debug ("%s: interface %s index %d",
633 __func__
, ifp
->name
, ifp
->ifindex
);
638 /* Address read from struct ifa_msghdr. */
640 ifam_read_mesg (struct ifa_msghdr
*ifm
,
641 union sockunion
*addr
,
642 union sockunion
*mask
,
643 union sockunion
*brd
,
649 union sockunion gateway
;
651 pnt
= (caddr_t
)(ifm
+ 1);
652 end
= ((caddr_t
)ifm
) + ifm
->ifam_msglen
;
654 /* Be sure structure is cleared */
655 memset (mask
, 0, sizeof (union sockunion
));
656 memset (addr
, 0, sizeof (union sockunion
));
657 memset (brd
, 0, sizeof (union sockunion
));
658 memset (&dst
, 0, sizeof (union sockunion
));
659 memset (&gateway
, 0, sizeof (union sockunion
));
661 /* We fetch each socket variable into sockunion. */
662 RTA_ADDR_GET (&dst
, RTA_DST
, ifm
->ifam_addrs
, pnt
);
663 RTA_ADDR_GET (&gateway
, RTA_GATEWAY
, ifm
->ifam_addrs
, pnt
);
664 RTA_ATTR_GET (mask
, RTA_NETMASK
, ifm
->ifam_addrs
, pnt
);
665 RTA_ADDR_GET (NULL
, RTA_GENMASK
, ifm
->ifam_addrs
, pnt
);
666 RTA_NAME_GET (ifname
, RTA_IFP
, ifm
->ifam_addrs
, pnt
, *ifnlen
);
667 RTA_ADDR_GET (addr
, RTA_IFA
, ifm
->ifam_addrs
, pnt
);
668 RTA_ADDR_GET (NULL
, RTA_AUTHOR
, ifm
->ifam_addrs
, pnt
);
669 RTA_ADDR_GET (brd
, RTA_BRD
, ifm
->ifam_addrs
, pnt
);
671 if (IS_ZEBRA_DEBUG_KERNEL
)
673 int family
= sockunion_family(addr
);
679 char buf
[4][INET6_ADDRSTRLEN
];
680 zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x, "
681 "ifam_flags 0x%x, addr %s/%d broad %s dst %s "
683 __func__
, ifm
->ifam_index
,
684 (ifnlen
? ifname
: "(nil)"), ifm
->ifam_addrs
,
686 inet_ntop(family
,&addr
->sin
.sin_addr
,
687 buf
[0],sizeof(buf
[0])),
688 ip_masklen(mask
->sin
.sin_addr
),
689 inet_ntop(family
,&brd
->sin
.sin_addr
,
690 buf
[1],sizeof(buf
[1])),
691 inet_ntop(family
,&dst
.sin
.sin_addr
,
692 buf
[2],sizeof(buf
[2])),
693 inet_ntop(family
,&gateway
.sin
.sin_addr
,
694 buf
[3],sizeof(buf
[3])));
698 zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x",
699 __func__
, ifm
->ifam_index
,
700 (ifnlen
? ifname
: "(nil)"), ifm
->ifam_addrs
);
705 /* Assert read up end point matches to end point */
707 zlog_warn ("ifam_read() doesn't read all socket data");
710 /* Interface's address information get. */
712 ifam_read (struct ifa_msghdr
*ifam
)
714 struct interface
*ifp
= NULL
;
715 union sockunion addr
, mask
, brd
;
716 char ifname
[INTERFACE_NAMSIZ
];
721 ifname
[0] = ifname
[INTERFACE_NAMSIZ
- 1] = '\0';
723 /* Allocate and read address information. */
724 ifam_read_mesg (ifam
, &addr
, &mask
, &brd
, ifname
, &ifnlen
);
726 if ((ifp
= if_lookup_by_index(ifam
->ifam_index
, VRF_DEFAULT
)) == NULL
)
728 zlog_warn ("%s: no interface for ifname %s, index %d",
729 __func__
, ifname
, ifam
->ifam_index
);
733 if (ifnlen
&& strncmp (ifp
->name
, ifname
, INTERFACE_NAMSIZ
))
736 /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD
737 field contains a broadcast address or a peer address, so we are forced to
738 rely upon the interface type. */
739 if (if_is_pointopoint(ifp
))
740 SET_FLAG(flags
, ZEBRA_IFA_PEER
);
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.
748 ifp
->metric
= ifam
->ifam_metric
;
751 /* Add connected address. */
752 switch (sockunion_family (&addr
))
755 if (ifam
->ifam_type
== RTM_NEWADDR
)
756 connected_add_ipv4 (ifp
, flags
, &addr
.sin
.sin_addr
,
757 ip_masklen (mask
.sin
.sin_addr
),
759 (isalias
? ifname
: NULL
));
761 connected_delete_ipv4 (ifp
, flags
, &addr
.sin
.sin_addr
,
762 ip_masklen (mask
.sin
.sin_addr
),
766 /* Unset interface index from link-local address when IPv6 stack
768 if (IN6_IS_ADDR_LINKLOCAL (&addr
.sin6
.sin6_addr
))
770 SET_IN6_LINKLOCAL_IFINDEX (addr
.sin6
.sin6_addr
, 0);
773 if (ifam
->ifam_type
== RTM_NEWADDR
)
774 connected_add_ipv6 (ifp
, flags
, &addr
.sin6
.sin6_addr
,
775 ip6_masklen (mask
.sin6
.sin6_addr
),
777 (isalias
? ifname
: NULL
));
779 connected_delete_ipv6 (ifp
,
780 &addr
.sin6
.sin6_addr
,
781 ip6_masklen (mask
.sin6
.sin6_addr
),
782 &brd
.sin6
.sin6_addr
);
785 /* Unsupported family silently ignore... */
789 /* Check interface flag for implicit up of the interface. */
793 /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange.
794 * See comments for SUNOS_5 in interface.c::if_flags_mangle.
796 * Here we take care of case where the real IFF_UP was previously
797 * unset (as kept in struct zebra_if.primary_state) and the mangled
798 * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned
799 * to unset due to the lost non-primary address having DELADDR'd.
801 * we must delete the interface, because in between here and next
802 * event for this interface-name the administrator could unplumb
803 * and replumb the interface.
806 if_delete_update (ifp
);
812 /* Interface function for reading kernel routing table information. */
814 rtm_read_mesg (struct rt_msghdr
*rtm
,
815 union sockunion
*dest
,
816 union sockunion
*mask
,
817 union sockunion
*gate
,
823 /* Pnt points out socket data start point. */
824 pnt
= (caddr_t
)(rtm
+ 1);
825 end
= ((caddr_t
)rtm
) + rtm
->rtm_msglen
;
827 /* rt_msghdr version check. */
828 if (rtm
->rtm_version
!= RTM_VERSION
)
829 zlog_warn("Routing message version different %d should be %d." "This may cause problem\n",
830 rtm
->rtm_version
, RTM_VERSION
);
832 /* Be sure structure is cleared */
833 memset (dest
, 0, sizeof (union sockunion
));
834 memset (gate
, 0, sizeof (union sockunion
));
835 memset (mask
, 0, sizeof (union sockunion
));
837 /* We fetch each socket variable into sockunion. */
838 RTA_ADDR_GET (dest
, RTA_DST
, rtm
->rtm_addrs
, pnt
);
839 RTA_ADDR_GET (gate
, RTA_GATEWAY
, rtm
->rtm_addrs
, pnt
);
840 RTA_ATTR_GET (mask
, RTA_NETMASK
, rtm
->rtm_addrs
, pnt
);
841 RTA_ADDR_GET (NULL
, RTA_GENMASK
, rtm
->rtm_addrs
, pnt
);
842 RTA_NAME_GET (ifname
, RTA_IFP
, rtm
->rtm_addrs
, pnt
, *ifnlen
);
843 RTA_ADDR_GET (NULL
, RTA_IFA
, rtm
->rtm_addrs
, pnt
);
844 RTA_ADDR_GET (NULL
, RTA_AUTHOR
, rtm
->rtm_addrs
, pnt
);
845 RTA_ADDR_GET (NULL
, RTA_BRD
, rtm
->rtm_addrs
, pnt
);
847 /* If there is netmask information set it's family same as
849 if (rtm
->rtm_addrs
& RTA_NETMASK
)
850 mask
->sa
.sa_family
= dest
->sa
.sa_family
;
852 /* Assert read up to the end of pointer. */
854 zlog_warn("rtm_read() doesn't read all socket data.");
856 return rtm
->rtm_flags
;
860 rtm_read (struct rt_msghdr
*rtm
)
864 union sockunion dest
, mask
, gate
;
865 char ifname
[INTERFACE_NAMSIZ
+ 1];
870 /* Read destination and netmask and gateway from rtm message
872 flags
= rtm_read_mesg (rtm
, &dest
, &mask
, &gate
, ifname
, &ifnlen
);
873 if (!(flags
& RTF_DONE
))
875 if (IS_ZEBRA_DEBUG_KERNEL
)
876 zlog_debug ("%s: got rtm of type %d (%s)", __func__
, rtm
->rtm_type
,
877 lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
));
879 #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/
880 if (flags
& RTF_CLONED
)
883 #ifdef RTF_WASCLONED /*freebsd*/
884 if (flags
& RTF_WASCLONED
)
888 if ((rtm
->rtm_type
== RTM_ADD
|| rtm
->rtm_type
== RTM_CHANGE
) && ! (flags
& RTF_UP
))
891 /* This is connected route. */
892 if (! (flags
& RTF_GATEWAY
))
895 if (flags
& RTF_PROTO1
)
896 SET_FLAG (zebra_flags
, ZEBRA_FLAG_SELFROUTE
);
898 /* This is persistent route. */
899 if (flags
& RTF_STATIC
)
900 SET_FLAG (zebra_flags
, ZEBRA_FLAG_STATIC
);
902 /* This is a reject or blackhole route */
903 if (flags
& RTF_REJECT
)
904 SET_FLAG (zebra_flags
, ZEBRA_FLAG_REJECT
);
905 if (flags
& RTF_BLACKHOLE
)
906 SET_FLAG (zebra_flags
, ZEBRA_FLAG_BLACKHOLE
);
908 if (dest
.sa
.sa_family
== AF_INET
)
913 p
.u
.prefix4
= dest
.sin
.sin_addr
;
914 if (flags
& RTF_HOST
)
915 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
917 p
.prefixlen
= ip_masklen (mask
.sin
.sin_addr
);
919 /* Catch self originated messages and match them against our current RIB.
920 * At the same time, ignore unconfirmed messages, they should be tracked
921 * by rtm_write() and kernel_rtm_ipv4().
923 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
)
925 char buf
[PREFIX_STRLEN
], gate_buf
[INET_ADDRSTRLEN
];
927 if (! IS_ZEBRA_DEBUG_RIB
)
929 ret
= rib_lookup_ipv4_route ((struct prefix_ipv4
*)&p
, &gate
, VRF_DEFAULT
);
930 prefix2str (&p
, buf
, sizeof(buf
));
931 switch (rtm
->rtm_type
)
936 /* The kernel notifies us about a new route in FIB created by us.
937 Do we have a correspondent entry in our RIB? */
940 case ZEBRA_RIB_NOTFOUND
:
941 zlog_debug ("%s: %s %s: desync: RR isn't yet in RIB, while already in FIB",
942 __func__
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
), buf
);
944 case ZEBRA_RIB_FOUND_CONNECTED
:
945 case ZEBRA_RIB_FOUND_NOGATE
:
946 inet_ntop (AF_INET
, &gate
.sin
.sin_addr
, gate_buf
, INET_ADDRSTRLEN
);
947 zlog_debug ("%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)",
948 __func__
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
), buf
, gate_buf
);
950 case ZEBRA_RIB_FOUND_EXACT
: /* RIB RR == FIB RR */
951 zlog_debug ("%s: %s %s: done Ok",
952 __func__
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
), buf
);
953 rib_lookup_and_dump ((struct prefix_ipv4
*)&p
, VRF_DEFAULT
);
959 /* The kernel notifies us about a route deleted by us. Do we still
960 have it in the RIB? Do we have anything instead? */
963 case ZEBRA_RIB_FOUND_EXACT
:
964 zlog_debug ("%s: %s %s: desync: RR is still in RIB, while already not in FIB",
965 __func__
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
), buf
);
966 rib_lookup_and_dump ((struct prefix_ipv4
*)&p
, VRF_DEFAULT
);
968 case ZEBRA_RIB_FOUND_CONNECTED
:
969 case ZEBRA_RIB_FOUND_NOGATE
:
970 zlog_debug ("%s: %s %s: desync: RR is still in RIB, plus gate differs",
971 __func__
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
), buf
);
972 rib_lookup_and_dump ((struct prefix_ipv4
*)&p
, VRF_DEFAULT
);
974 case ZEBRA_RIB_NOTFOUND
: /* RIB RR == FIB RR */
975 zlog_debug ("%s: %s %s: done Ok",
976 __func__
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
), buf
);
977 rib_lookup_and_dump ((struct prefix_ipv4
*)&p
, VRF_DEFAULT
);
983 zlog_debug ("%s: %s: warning: loopback RTM of type %s received",
984 __func__
, buf
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
));
989 /* Change, delete the old prefix, we have no further information
990 * to specify the route really
992 if (rtm
->rtm_type
== RTM_CHANGE
)
993 rib_delete (AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
994 0, zebra_flags
, &p
, NULL
, NULL
, 0, 0);
996 union g_addr ggate
= { .ipv4
= gate
.sin
.sin_addr
};
997 if (rtm
->rtm_type
== RTM_GET
998 || rtm
->rtm_type
== RTM_ADD
999 || rtm
->rtm_type
== RTM_CHANGE
)
1000 rib_add (AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
,
1001 &p
, NULL
, &ggate
, NULL
, 0, 0, 0, 0, 0);
1003 rib_delete (AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1004 0, zebra_flags
, &p
, NULL
, &ggate
, 0, 0);
1006 if (dest
.sa
.sa_family
== AF_INET6
)
1008 /* One day we might have a debug section here like one in the
1009 * IPv4 case above. Just ignore own messages at the moment.
1011 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
)
1014 ifindex_t ifindex
= 0;
1016 p
.family
= AF_INET6
;
1017 p
.u
.prefix6
= dest
.sin6
.sin6_addr
;
1018 if (flags
& RTF_HOST
)
1019 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
1021 p
.prefixlen
= ip6_masklen (mask
.sin6
.sin6_addr
);
1024 if (IN6_IS_ADDR_LINKLOCAL (&gate
.sin6
.sin6_addr
))
1026 ifindex
= IN6_LINKLOCAL_IFINDEX (gate
.sin6
.sin6_addr
);
1027 SET_IN6_LINKLOCAL_IFINDEX (gate
.sin6
.sin6_addr
, 0);
1031 /* CHANGE: delete the old prefix, we have no further information
1032 * to specify the route really
1034 if (rtm
->rtm_type
== RTM_CHANGE
)
1035 rib_delete (AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1036 0, zebra_flags
, &p
, NULL
, NULL
, 0, 0);
1038 union g_addr ggate
= { .ipv6
= gate
.sin6
.sin6_addr
};
1039 if (rtm
->rtm_type
== RTM_GET
1040 || rtm
->rtm_type
== RTM_ADD
1041 || rtm
->rtm_type
== RTM_CHANGE
)
1042 rib_add (AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1043 0, zebra_flags
, &p
, NULL
, &ggate
, NULL
, ifindex
,
1046 rib_delete (AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1047 0, zebra_flags
, &p
, NULL
, &ggate
, ifindex
, 0);
1051 /* Interface function for the kernel routing table updates. Support
1052 * for RTM_CHANGE will be needed.
1053 * Exported only for rt_socket.c
1056 rtm_write (int message
,
1057 union sockunion
*dest
,
1058 union sockunion
*mask
,
1059 union sockunion
*gate
,
1060 union sockunion
*mpls
,
1067 struct interface
*ifp
;
1069 /* Sequencial number of routing message. */
1070 static int msg_seq
= 0;
1072 /* Struct of rt_msghdr and buffer for storing socket's data. */
1075 struct rt_msghdr rtm
;
1079 if (routing_sock
< 0)
1080 return ZEBRA_ERR_EPERM
;
1082 /* Clear and set rt_msghdr values */
1083 memset (&msg
, 0, sizeof (struct rt_msghdr
));
1084 msg
.rtm
.rtm_version
= RTM_VERSION
;
1085 msg
.rtm
.rtm_type
= message
;
1086 msg
.rtm
.rtm_seq
= msg_seq
++;
1087 msg
.rtm
.rtm_addrs
= RTA_DST
;
1088 msg
.rtm
.rtm_addrs
|= RTA_GATEWAY
;
1089 msg
.rtm
.rtm_flags
= RTF_UP
;
1091 msg
.rtm
.rtm_flags
|= RTF_MPATH
;
1092 msg
.rtm
.rtm_fmask
= RTF_MPLS
;
1094 msg
.rtm
.rtm_index
= index
;
1098 msg
.rtm
.rtm_rmx
.rmx_hopcount
= metric
;
1099 msg
.rtm
.rtm_inits
|= RTV_HOPCOUNT
;
1102 ifp
= if_lookup_by_index (index
, VRF_DEFAULT
);
1104 if (gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
))
1105 msg
.rtm
.rtm_flags
|= RTF_GATEWAY
;
1107 /* When RTF_CLONING is unavailable on BSD, should we set some
1108 * other flag instead?
1111 if (! gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
) && ifp
&&
1112 (ifp
->flags
& IFF_POINTOPOINT
) == 0)
1113 msg
.rtm
.rtm_flags
|= RTF_CLONING
;
1114 #endif /* RTF_CLONING */
1116 /* If no protocol specific gateway is specified, use link
1117 address for gateway. */
1122 char dest_buf
[INET_ADDRSTRLEN
] = "NULL", mask_buf
[INET_ADDRSTRLEN
] = "255.255.255.255";
1124 inet_ntop (AF_INET
, &dest
->sin
.sin_addr
, dest_buf
, INET_ADDRSTRLEN
);
1126 inet_ntop (AF_INET
, &mask
->sin
.sin_addr
, mask_buf
, INET_ADDRSTRLEN
);
1127 zlog_warn ("%s: %s/%s: gate == NULL and no gateway found for ifindex %d",
1128 __func__
, dest_buf
, mask_buf
, index
);
1131 gate
= (union sockunion
*) &((struct zebra_if
*)ifp
->info
)->sdl
;
1135 msg
.rtm
.rtm_addrs
|= RTA_NETMASK
;
1136 else if (message
== RTM_ADD
|| message
== RTM_CHANGE
)
1137 msg
.rtm
.rtm_flags
|= RTF_HOST
;
1142 msg
.rtm
.rtm_addrs
|= RTA_SRC
;
1143 msg
.rtm
.rtm_flags
|= RTF_MPLS
;
1145 if (mpls
->smpls
.smpls_label
!= htonl (MPLS_IMP_NULL_LABEL
<< MPLS_LABEL_OFFSET
))
1146 msg
.rtm
.rtm_mpls
= MPLS_OP_PUSH
;
1150 /* Tagging route with flags */
1151 msg
.rtm
.rtm_flags
|= (RTF_PROTO1
);
1153 /* Additional flags. */
1154 if (zebra_flags
& ZEBRA_FLAG_BLACKHOLE
)
1155 msg
.rtm
.rtm_flags
|= RTF_BLACKHOLE
;
1156 if (zebra_flags
& ZEBRA_FLAG_REJECT
)
1157 msg
.rtm
.rtm_flags
|= RTF_REJECT
;
1160 #define SOCKADDRSET(X,R) \
1161 if (msg.rtm.rtm_addrs & (R)) \
1163 int len = SAROUNDUP (X); \
1164 memcpy (pnt, (caddr_t)(X), len); \
1168 pnt
= (caddr_t
) msg
.buf
;
1170 /* Write each socket data into rtm message buffer */
1171 SOCKADDRSET (dest
, RTA_DST
);
1172 SOCKADDRSET (gate
, RTA_GATEWAY
);
1173 SOCKADDRSET (mask
, RTA_NETMASK
);
1175 SOCKADDRSET (mpls
, RTA_SRC
);
1178 msg
.rtm
.rtm_msglen
= pnt
- (caddr_t
) &msg
;
1180 ret
= write (routing_sock
, &msg
, msg
.rtm
.rtm_msglen
);
1182 if (ret
!= msg
.rtm
.rtm_msglen
)
1184 if (errno
== EEXIST
)
1185 return ZEBRA_ERR_RTEXIST
;
1186 if (errno
== ENETUNREACH
)
1187 return ZEBRA_ERR_RTUNREACH
;
1189 return ZEBRA_ERR_RTNOEXIST
;
1191 zlog_warn ("%s: write : %s (%d)", __func__
, safe_strerror (errno
), errno
);
1192 return ZEBRA_ERR_KERNEL
;
1194 return ZEBRA_ERR_NOERROR
;
1199 #include "zebra/zserv.h"
1201 /* For debug purpose. */
1203 rtmsg_debug (struct rt_msghdr
*rtm
)
1205 zlog_debug ("Kernel: Len: %d Type: %s", rtm
->rtm_msglen
, lookup_msg(rtm_type_str
, rtm
->rtm_type
, NULL
));
1206 rtm_flag_dump (rtm
->rtm_flags
);
1207 zlog_debug ("Kernel: message seq %d", rtm
->rtm_seq
);
1208 zlog_debug ("Kernel: pid %lld, rtm_addrs 0x%x",
1209 (long long)rtm
->rtm_pid
, rtm
->rtm_addrs
);
1212 /* This is pretty gross, better suggestions welcome -- mhandler */
1215 #define RTAX_MAX RTA_NUMBITS
1218 #endif /* RTA_NUMBITS */
1219 #endif /* RTAX_MAX */
1221 /* Kernel routing table and interface updates via routing socket. */
1223 kernel_read (struct thread
*thread
)
1227 struct rt_msghdr
*rtm
;
1230 * This must be big enough for any message the kernel might send.
1231 * Rather than determining how many sockaddrs of what size might be
1232 * in each particular message, just use RTAX_MAX of sockaddr_storage
1233 * for each. Note that the sockaddrs must be after each message
1234 * definition, or rather after whichever happens to be the largest,
1235 * since the buffer needs to be big enough for a message and the
1236 * sockaddrs together.
1240 /* Routing information. */
1243 struct rt_msghdr rtm
;
1244 struct sockaddr_storage addr
[RTAX_MAX
];
1247 /* Interface information. */
1250 struct if_msghdr ifm
;
1251 struct sockaddr_storage addr
[RTAX_MAX
];
1254 /* Interface address information. */
1257 struct ifa_msghdr ifa
;
1258 struct sockaddr_storage addr
[RTAX_MAX
];
1261 #ifdef RTM_IFANNOUNCE
1262 /* Interface arrival/departure */
1265 struct if_announcemsghdr ifan
;
1266 struct sockaddr_storage addr
[RTAX_MAX
];
1268 #endif /* RTM_IFANNOUNCE */
1272 /* Fetch routing socket. */
1273 sock
= THREAD_FD (thread
);
1275 nbytes
= read (sock
, &buf
, sizeof buf
);
1279 if (nbytes
< 0 && errno
!= EWOULDBLOCK
&& errno
!= EAGAIN
)
1280 zlog_warn ("routing socket error: %s", safe_strerror (errno
));
1284 thread_add_read(zebrad
.master
, kernel_read
, NULL
, sock
, NULL
);
1286 if (IS_ZEBRA_DEBUG_KERNEL
)
1287 rtmsg_debug (&buf
.r
.rtm
);
1292 * Ensure that we didn't drop any data, so that processing routines
1293 * can assume they have the whole message.
1295 if (rtm
->rtm_msglen
!= nbytes
)
1297 zlog_warn ("kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n",
1298 rtm
->rtm_msglen
, nbytes
, rtm
->rtm_type
);
1302 switch (rtm
->rtm_type
)
1310 ifm_read (&buf
.im
.ifm
);
1314 ifam_read (&buf
.ia
.ifa
);
1316 #ifdef RTM_IFANNOUNCE
1317 case RTM_IFANNOUNCE
:
1318 ifan_read (&buf
.ian
.ifan
);
1320 #endif /* RTM_IFANNOUNCE */
1322 if (IS_ZEBRA_DEBUG_KERNEL
)
1323 zlog_debug("Unprocessed RTM_type: %d", rtm
->rtm_type
);
1329 /* Make routing socket. */
1331 routing_socket (struct zebra_ns
*zns
)
1333 if ( zserv_privs
.change (ZPRIVS_RAISE
) )
1334 zlog_err ("routing_socket: Can't raise privileges");
1336 routing_sock
= socket (AF_ROUTE
, SOCK_RAW
, 0);
1338 if (routing_sock
< 0)
1340 if ( zserv_privs
.change (ZPRIVS_LOWER
) )
1341 zlog_err ("routing_socket: Can't lower privileges");
1342 zlog_warn ("Can't init kernel routing socket");
1346 /* XXX: Socket should be NONBLOCK, however as we currently
1347 * discard failed writes, this will lead to inconsistencies.
1348 * For now, socket must be blocking.
1350 /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0)
1351 zlog_warn ("Can't set O_NONBLOCK to routing socket");*/
1353 if ( zserv_privs
.change (ZPRIVS_LOWER
) )
1354 zlog_err ("routing_socket: Can't lower privileges");
1356 /* kernel_read needs rewrite. */
1357 thread_add_read(zebrad
.master
, kernel_read
, NULL
, routing_sock
, NULL
);
1360 /* Exported interface function. This function simply calls
1361 routing_socket (). */
1363 kernel_init (struct zebra_ns
*zns
)
1365 routing_socket (zns
);
1369 kernel_terminate (struct zebra_ns
*zns
)