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
17 * along with GNU Zebra; see the file COPYING. If not, write to the Free
18 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
23 #include <net/if_types.h>
25 #include <netmpls/mpls.h>
30 #include "sockunion.h"
31 #include "connected.h"
33 #include "zebra_memory.h"
42 #include "zebra/interface.h"
43 #include "zebra/zserv.h"
44 #include "zebra/debug.h"
45 #include "zebra/kernel_socket.h"
46 #include "zebra/rib.h"
48 extern struct zebra_privs_t zserv_privs
;
51 * Historically, the BSD routing socket has aligned data following a
52 * struct sockaddr to sizeof(long), which was 4 bytes on some
53 * platforms, and 8 bytes on others. NetBSD 6 changed the routing
54 * socket to align to sizeof(uint64_t), which is 8 bytes. OS X
55 * appears to align to sizeof(int), which is 4 bytes.
57 * Alignment of zero-sized sockaddrs is nonsensical, but historically
58 * BSD defines RT_ROUNDUP(0) to be the alignment interval (rather than
59 * 0). We follow this practice without questioning it, but it is a
60 * bug if quagga calls ROUNDUP with 0.
64 * Because of these varying conventions, the only sane approach is for
65 * the <net/route.h> header to define some flavor of ROUNDUP macro.
69 /* SAROUNDUP is the only thing we need, and SA_SIZE provides that */
70 #define SAROUNDUP(a) SA_SIZE(a)
73 #if defined(RT_ROUNDUP)
74 #define ROUNDUP(a) RT_ROUNDUP(a)
75 #endif /* defined(RT_ROUNDUP) */
78 /* Solaris has struct sockaddr_in[6] definitions at 16 / 32 bytes size,
79 * so the whole concept doesn't really apply. */
80 #define ROUNDUP(a) (a)
84 * If ROUNDUP has not yet been defined in terms of platform-provided
85 * defines, attempt to cope with heuristics.
90 * It's a bug for a platform not to define rounding/alignment for
91 * sockaddrs on the routing socket. This warning really is
92 * intentional, to provoke filing bug reports with operating systems
93 * that don't define RT_ROUNDUP or equivalent.
95 #warning "net/route.h does not define RT_ROUNDUP; making unwarranted assumptions!"
97 /* OS X (Xcode as of 2014-12) is known not to define RT_ROUNDUP */
99 #define ROUNDUP_TYPE int
101 #define ROUNDUP_TYPE long
105 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(ROUNDUP_TYPE) - 1))) : 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)
115 #elif defined(HAVE_IPV6)
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)) : sizeof(struct sockaddr))))
127 #else /* HAVE_IPV6 */
128 #define SAROUNDUP(X) \
129 (((struct sockaddr *)(X))->sa_family == AF_INET ? \
130 ROUNDUP(sizeof(struct sockaddr_in)):\
131 (((struct sockaddr *)(X))->sa_family == AF_LINK ? \
132 ROUNDUP(sizeof(struct sockaddr_dl)) : sizeof(struct sockaddr)))
133 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
135 #endif /* !SA_SIZE */
138 * We use a call to an inline function to copy (PNT) to (DEST)
139 * 1. Calculating the length of the copy requires an #ifdef to determine
140 * if sa_len is a field and can't be used directly inside a #define
141 * 2. So the compiler doesn't complain when DEST is NULL, which is only true
142 * when we are skipping the copy and incrementing to the next SA
145 rta_copy (union sockunion
*dest
, caddr_t src
) {
149 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
150 len
= (((struct sockaddr
*)src
)->sa_len
> sizeof (*dest
)) ?
151 sizeof (*dest
) : ((struct sockaddr
*)src
)->sa_len
;
153 len
= (SAROUNDUP (src
) > sizeof (*dest
)) ?
154 sizeof (*dest
) : SAROUNDUP (src
) ;
156 memcpy (dest
, src
, len
);
159 #define RTA_ADDR_GET(DEST, RTA, RTMADDRS, PNT) \
160 if ((RTMADDRS) & (RTA)) \
162 int len = SAROUNDUP ((PNT)); \
163 if (af_check (((struct sockaddr *)(PNT))->sa_family)) \
164 rta_copy((DEST), (PNT)); \
167 #define RTA_ATTR_GET(DEST, RTA, RTMADDRS, PNT) \
168 if ((RTMADDRS) & (RTA)) \
170 int len = SAROUNDUP ((PNT)); \
171 rta_copy((DEST), (PNT)); \
175 #define RTA_NAME_GET(DEST, RTA, RTMADDRS, PNT, LEN) \
176 if ((RTMADDRS) & (RTA)) \
178 u_char *pdest = (u_char *) (DEST); \
179 int len = SAROUNDUP ((PNT)); \
180 struct sockaddr_dl *sdl = (struct sockaddr_dl *)(PNT); \
181 if (IS_ZEBRA_DEBUG_KERNEL) \
182 zlog_debug ("%s: RTA_SDL_GET nlen %d, alen %d", \
183 __func__, sdl->sdl_nlen, sdl->sdl_alen); \
184 if ( ((DEST) != NULL) && (sdl->sdl_family == AF_LINK) \
185 && (sdl->sdl_nlen < IFNAMSIZ) && (sdl->sdl_nlen <= len) ) \
187 memcpy (pdest, sdl->sdl_data, sdl->sdl_nlen); \
188 pdest[sdl->sdl_nlen] = '\0'; \
189 (LEN) = sdl->sdl_nlen; \
197 /* Routing socket message types. */
198 const struct message rtm_type_str
[] =
200 {RTM_ADD
, "RTM_ADD"},
201 {RTM_DELETE
, "RTM_DELETE"},
202 {RTM_CHANGE
, "RTM_CHANGE"},
203 {RTM_GET
, "RTM_GET"},
204 {RTM_LOSING
, "RTM_LOSING"},
205 {RTM_REDIRECT
, "RTM_REDIRECT"},
206 {RTM_MISS
, "RTM_MISS"},
207 {RTM_LOCK
, "RTM_LOCK"},
209 {RTM_OLDADD
, "RTM_OLDADD"},
210 #endif /* RTM_OLDADD */
212 {RTM_OLDDEL
, "RTM_OLDDEL"},
213 #endif /* RTM_OLDDEL */
214 {RTM_RESOLVE
, "RTM_RESOLVE"},
215 {RTM_NEWADDR
, "RTM_NEWADDR"},
216 {RTM_DELADDR
, "RTM_DELADDR"},
217 {RTM_IFINFO
, "RTM_IFINFO"},
219 {RTM_OIFINFO
, "RTM_OIFINFO"},
220 #endif /* RTM_OIFINFO */
222 {RTM_NEWMADDR
, "RTM_NEWMADDR"},
223 #endif /* RTM_NEWMADDR */
225 {RTM_DELMADDR
, "RTM_DELMADDR"},
226 #endif /* RTM_DELMADDR */
227 #ifdef RTM_IFANNOUNCE
228 {RTM_IFANNOUNCE
, "RTM_IFANNOUNCE"},
229 #endif /* RTM_IFANNOUNCE */
233 static const struct message rtm_flag_str
[] =
236 {RTF_GATEWAY
, "GATEWAY"},
238 {RTF_REJECT
, "REJECT"},
239 {RTF_DYNAMIC
, "DYNAMIC"},
240 {RTF_MODIFIED
, "MODIFIED"},
244 #endif /* RTF_MASK */
246 {RTF_CLONING
, "CLONING"},
247 #endif /* RTF_CLONING */
249 {RTF_XRESOLVE
, "XRESOLVE"},
250 #endif /* RTF_XRESOLVE */
252 {RTF_LLINFO
, "LLINFO"},
253 #endif /* RTF_LLINFO */
254 {RTF_STATIC
, "STATIC"},
255 {RTF_BLACKHOLE
, "BLACKHOLE"},
257 {RTF_PRIVATE
, "PRIVATE"},
258 #endif /* RTF_PRIVATE */
259 {RTF_PROTO1
, "PROTO1"},
260 {RTF_PROTO2
, "PROTO2"},
262 {RTF_PRCLONING
, "PRCLONING"},
263 #endif /* RTF_PRCLONING */
265 {RTF_WASCLONED
, "WASCLONED"},
266 #endif /* RTF_WASCLONED */
268 {RTF_PROTO3
, "PROTO3"},
269 #endif /* RTF_PROTO3 */
271 {RTF_PINNED
, "PINNED"},
272 #endif /* RTF_PINNED */
274 {RTF_LOCAL
, "LOCAL"},
275 #endif /* RTF_LOCAL */
277 {RTF_BROADCAST
, "BROADCAST"},
278 #endif /* RTF_BROADCAST */
280 {RTF_MULTICAST
, "MULTICAST"},
281 #endif /* RTF_MULTICAST */
283 {RTF_MULTIRT
, "MULTIRT"},
284 #endif /* RTF_MULTIRT */
286 {RTF_SETSRC
, "SETSRC"},
287 #endif /* RTF_SETSRC */
291 /* Kernel routing update socket. */
292 int routing_sock
= -1;
294 /* Yes I'm checking ugly routing socket behavior. */
297 /* Supported address family check. */
299 af_check (int family
)
301 if (family
== AF_INET
)
304 if (family
== AF_INET6
)
306 #endif /* HAVE_IPV6 */
310 /* Dump routing table flag for debug purpose. */
312 rtm_flag_dump (int flag
)
314 const struct message
*mes
;
315 static char buf
[BUFSIZ
];
318 for (mes
= rtm_flag_str
; mes
->key
!= 0; mes
++)
322 strlcat (buf
, mes
->str
, BUFSIZ
);
323 strlcat (buf
, " ", BUFSIZ
);
326 zlog_debug ("Kernel: %s", buf
);
329 #ifdef RTM_IFANNOUNCE
330 /* Interface adding function */
332 ifan_read (struct if_announcemsghdr
*ifan
)
334 struct interface
*ifp
;
336 ifp
= if_lookup_by_index (ifan
->ifan_index
);
339 assert ( (ifp
->ifindex
== ifan
->ifan_index
)
340 || (ifp
->ifindex
== IFINDEX_INTERNAL
) );
343 || ((ifp
->ifindex
== IFINDEX_INTERNAL
)
344 && (ifan
->ifan_what
== IFAN_ARRIVAL
)) )
346 if (IS_ZEBRA_DEBUG_KERNEL
)
347 zlog_debug ("%s: creating interface for ifindex %d, name %s",
348 __func__
, ifan
->ifan_index
, ifan
->ifan_name
);
350 /* Create Interface */
351 ifp
= if_get_by_name_len(ifan
->ifan_name
,
352 strnlen(ifan
->ifan_name
,
353 sizeof(ifan
->ifan_name
)));
354 ifp
->ifindex
= ifan
->ifan_index
;
359 else if (ifp
!= NULL
&& ifan
->ifan_what
== IFAN_DEPARTURE
)
360 if_delete_update (ifp
);
366 if (IS_ZEBRA_DEBUG_KERNEL
)
367 zlog_debug ("%s: interface %s index %d",
368 __func__
, ifan
->ifan_name
, ifan
->ifan_index
);
372 #endif /* RTM_IFANNOUNCE */
374 #ifdef HAVE_BSD_IFI_LINK_STATE
375 /* BSD link detect translation */
377 bsd_linkdetect_translate (struct if_msghdr
*ifm
)
379 if ((ifm
->ifm_data
.ifi_link_state
>= LINK_STATE_UP
) ||
380 (ifm
->ifm_data
.ifi_link_state
== LINK_STATE_UNKNOWN
))
381 SET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
383 UNSET_FLAG(ifm
->ifm_flags
, IFF_RUNNING
);
385 #endif /* HAVE_BSD_IFI_LINK_STATE */
387 static enum zebra_link_type
388 sdl_to_zebra_link_type (unsigned int sdlt
)
392 case IFT_ETHER
: return ZEBRA_LLT_ETHER
;
393 case IFT_X25
: return ZEBRA_LLT_X25
;
394 case IFT_FDDI
: return ZEBRA_LLT_FDDI
;
395 case IFT_PPP
: return ZEBRA_LLT_PPP
;
396 case IFT_LOOP
: return ZEBRA_LLT_LOOPBACK
;
397 case IFT_SLIP
: return ZEBRA_LLT_SLIP
;
398 case IFT_ARCNET
: return ZEBRA_LLT_ARCNET
;
399 case IFT_ATM
: return ZEBRA_LLT_ATM
;
400 case IFT_LOCALTALK
: return ZEBRA_LLT_LOCALTLK
;
401 case IFT_HIPPI
: return ZEBRA_LLT_HIPPI
;
403 case IFT_IEEE1394
: return ZEBRA_LLT_IEEE1394
;
406 default: return ZEBRA_LLT_UNKNOWN
;
411 * Handle struct if_msghdr obtained from reading routing socket or
412 * sysctl (from interface_list). There may or may not be sockaddrs
413 * present after the header.
416 ifm_read (struct if_msghdr
*ifm
)
418 struct interface
*ifp
= NULL
;
419 struct sockaddr_dl
*sdl
;
420 char ifname
[IFNAMSIZ
];
424 /* terminate ifname at head (for strnlen) and tail (for safety) */
425 ifname
[IFNAMSIZ
- 1] = '\0';
427 /* paranoia: sanity check structure */
428 if (ifm
->ifm_msglen
< sizeof(struct if_msghdr
))
430 zlog_err ("ifm_read: ifm->ifm_msglen %d too short\n",
436 * Check for a sockaddr_dl following the message. First, point to
437 * where a socakddr might be if one follows the message.
439 cp
= (void *)(ifm
+ 1);
443 * XXX This behavior should be narrowed to only the kernel versions
444 * for which the structures returned do not match the headers.
446 * if_msghdr_t on 64 bit kernels in Solaris 9 and earlier versions
447 * is 12 bytes larger than the 32 bit version.
449 if (((struct sockaddr
*) cp
)->sa_family
== AF_UNSPEC
)
453 RTA_ADDR_GET (NULL
, RTA_DST
, ifm
->ifm_addrs
, cp
);
454 RTA_ADDR_GET (NULL
, RTA_GATEWAY
, ifm
->ifm_addrs
, cp
);
455 RTA_ATTR_GET (NULL
, RTA_NETMASK
, ifm
->ifm_addrs
, cp
);
456 RTA_ADDR_GET (NULL
, RTA_GENMASK
, ifm
->ifm_addrs
, cp
);
457 sdl
= (struct sockaddr_dl
*)cp
;
458 RTA_NAME_GET (ifname
, RTA_IFP
, ifm
->ifm_addrs
, cp
, ifnlen
);
459 RTA_ADDR_GET (NULL
, RTA_IFA
, ifm
->ifm_addrs
, cp
);
460 RTA_ADDR_GET (NULL
, RTA_AUTHOR
, ifm
->ifm_addrs
, cp
);
461 RTA_ADDR_GET (NULL
, RTA_BRD
, ifm
->ifm_addrs
, cp
);
463 if (IS_ZEBRA_DEBUG_KERNEL
)
464 zlog_debug ("%s: sdl ifname %s", __func__
, (ifnlen
? ifname
: "(nil)"));
467 * Look up on ifindex first, because ifindices are the primary handle for
468 * interfaces across the user/kernel boundary, for most systems. (Some
469 * messages, such as up/down status changes on NetBSD, do not include a
472 if ( (ifp
= if_lookup_by_index (ifm
->ifm_index
)) != NULL
)
474 /* we have an ifp, verify that the name matches as some systems,
475 * eg Solaris, have a 1:many association of ifindex:ifname
476 * if they dont match, we dont have the correct ifp and should
477 * set it back to NULL to let next check do lookup by name
479 if (ifnlen
&& (strncmp (ifp
->name
, ifname
, IFNAMSIZ
) != 0) )
481 if (IS_ZEBRA_DEBUG_KERNEL
)
482 zlog_debug ("%s: ifp name %s doesnt match sdl name %s",
483 __func__
, ifp
->name
, ifname
);
489 * If we dont have an ifp, try looking up by name. Particularly as some
490 * systems (Solaris) have a 1:many mapping of ifindex:ifname - the ifname
491 * is therefore our unique handle to that interface.
493 * Interfaces specified in the configuration file for which the ifindex
494 * has not been determined will have ifindex == IFINDEX_INTERNAL, and such
495 * interfaces are found by this search, and then their ifindex values can
498 if ( (ifp
== NULL
) && ifnlen
)
499 ifp
= if_lookup_by_name (ifname
);
502 * If ifp still does not exist or has an invalid index (IFINDEX_INTERNAL),
503 * create or fill in an interface.
505 if ((ifp
== NULL
) || (ifp
->ifindex
== IFINDEX_INTERNAL
))
508 * To create or fill in an interface, a sockaddr_dl (via
509 * RTA_IFP) is required.
513 zlog_warn ("Interface index %d (new) missing ifname\n",
518 #ifndef RTM_IFANNOUNCE
519 /* Down->Down interface should be ignored here.
520 * See further comment below.
522 if (!CHECK_FLAG (ifm
->ifm_flags
, IFF_UP
))
524 #endif /* !RTM_IFANNOUNCE */
528 /* Interface that zebra was not previously aware of, so create. */
529 ifp
= if_create (ifname
, ifnlen
);
530 if (IS_ZEBRA_DEBUG_KERNEL
)
531 zlog_debug ("%s: creating ifp for ifindex %d",
532 __func__
, ifm
->ifm_index
);
535 if (IS_ZEBRA_DEBUG_KERNEL
)
536 zlog_debug ("%s: updated/created ifp, ifname %s, ifindex %d",
537 __func__
, ifp
->name
, ifp
->ifindex
);
539 * Fill in newly created interface structure, or larval
540 * structure with ifindex IFINDEX_INTERNAL.
542 ifp
->ifindex
= ifm
->ifm_index
;
544 #ifdef HAVE_BSD_IFI_LINK_STATE /* translate BSD kernel msg for link-state */
545 bsd_linkdetect_translate(ifm
);
546 #endif /* HAVE_BSD_IFI_LINK_STATE */
548 if_flags_update (ifp
, ifm
->ifm_flags
);
549 #if defined(__bsdi__)
550 if_kvm_get_mtu (ifp
);
553 #endif /* __bsdi__ */
557 * XXX sockaddr_dl contents can be larger than the structure
558 * definition. There are 2 big families here:
559 * - BSD has sdl_len + sdl_data[16] + overruns sdl_data
560 * we MUST use sdl_len here or we'll truncate data.
561 * - Solaris has no sdl_len, but sdl_data[244]
562 * presumably, it's not going to run past that, so sizeof()
564 * a nonzero ifnlen from RTA_NAME_GET() means sdl is valid
566 ifp
->ll_type
= ZEBRA_LLT_UNKNOWN
;
567 ifp
->hw_addr_len
= 0;
570 #ifdef HAVE_STRUCT_SOCKADDR_DL_SDL_LEN
571 memcpy (&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
, sdl
->sdl_len
);
573 memcpy (&((struct zebra_if
*)ifp
->info
)->sdl
, sdl
, 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
))
579 memcpy (ifp
->hw_addr
, LLADDR(sdl
), sdl
->sdl_alen
);
580 ifp
->hw_addr_len
= sdl
->sdl_alen
;
588 * Interface structure exists. Adjust stored flags from
589 * notification. If interface has up->down or down->up
590 * transition, call state change routines (to adjust routes,
591 * notify routing daemons, etc.). (Other flag changes are stored
592 * but apparently do not trigger action.)
595 if (ifp
->ifindex
!= ifm
->ifm_index
)
597 zlog_warn ("%s: index mismatch, ifname %s, ifp index %d, "
599 __func__
, ifp
->name
, ifp
->ifindex
, ifm
->ifm_index
);
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 any */
608 if_flags_update (ifp
, ifm
->ifm_flags
);
610 #ifndef RTM_IFANNOUNCE
613 /* No RTM_IFANNOUNCE on this platform, so we can never
614 * distinguish between ~IFF_UP and delete. We must presume
615 * it has been deleted.
616 * Eg, Solaris will not notify us of unplumb.
618 * XXX: Fixme - this should be runtime detected
619 * So that a binary compiled on a system with IFANNOUNCE
620 * will still behave correctly if run on a platform without
622 if_delete_update (ifp
);
624 #endif /* RTM_IFANNOUNCE */
627 #if defined(__bsdi__)
628 if_kvm_get_mtu (ifp
);
631 #endif /* __bsdi__ */
636 #ifdef HAVE_NET_RT_IFLIST
637 ifp
->stats
= ifm
->ifm_data
;
638 #endif /* HAVE_NET_RT_IFLIST */
640 if (IS_ZEBRA_DEBUG_KERNEL
)
641 zlog_debug ("%s: interface %s index %d",
642 __func__
, ifp
->name
, ifp
->ifindex
);
647 /* Address read from struct ifa_msghdr. */
649 ifam_read_mesg (struct ifa_msghdr
*ifm
,
650 union sockunion
*addr
,
651 union sockunion
*mask
,
652 union sockunion
*brd
,
658 union sockunion gateway
;
660 pnt
= (caddr_t
)(ifm
+ 1);
661 end
= ((caddr_t
)ifm
) + ifm
->ifam_msglen
;
663 /* Be sure structure is cleared */
664 memset (mask
, 0, sizeof (union sockunion
));
665 memset (addr
, 0, sizeof (union sockunion
));
666 memset (brd
, 0, sizeof (union sockunion
));
667 memset (&dst
, 0, sizeof (union sockunion
));
668 memset (&gateway
, 0, sizeof (union sockunion
));
670 /* We fetch each socket variable into sockunion. */
671 RTA_ADDR_GET (&dst
, RTA_DST
, ifm
->ifam_addrs
, pnt
);
672 RTA_ADDR_GET (&gateway
, RTA_GATEWAY
, ifm
->ifam_addrs
, pnt
);
673 RTA_ATTR_GET (mask
, RTA_NETMASK
, ifm
->ifam_addrs
, pnt
);
674 RTA_ADDR_GET (NULL
, RTA_GENMASK
, ifm
->ifam_addrs
, pnt
);
675 RTA_NAME_GET (ifname
, RTA_IFP
, ifm
->ifam_addrs
, pnt
, *ifnlen
);
676 RTA_ADDR_GET (addr
, RTA_IFA
, ifm
->ifam_addrs
, pnt
);
677 RTA_ADDR_GET (NULL
, RTA_AUTHOR
, ifm
->ifam_addrs
, pnt
);
678 RTA_ADDR_GET (brd
, RTA_BRD
, ifm
->ifam_addrs
, pnt
);
680 if (IS_ZEBRA_DEBUG_KERNEL
)
682 int family
= sockunion_family(addr
);
690 char buf
[4][INET6_ADDRSTRLEN
];
691 zlog_debug ("%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
,
698 buf
[0],sizeof(buf
[0])),
699 ip_masklen(mask
->sin
.sin_addr
),
700 inet_ntop(family
,&brd
->sin
.sin_addr
,
701 buf
[1],sizeof(buf
[1])),
702 inet_ntop(family
,&dst
.sin
.sin_addr
,
703 buf
[2],sizeof(buf
[2])),
704 inet_ntop(family
,&gateway
.sin
.sin_addr
,
705 buf
[3],sizeof(buf
[3])));
709 zlog_debug ("%s: ifindex %d, ifname %s, ifam_addrs 0x%x",
710 __func__
, ifm
->ifam_index
,
711 (ifnlen
? ifname
: "(nil)"), ifm
->ifam_addrs
);
716 /* Assert read up end point matches to end point */
718 zlog_warn ("ifam_read() doesn't read all socket data");
721 /* Interface's address information get. */
723 ifam_read (struct ifa_msghdr
*ifam
)
725 struct interface
*ifp
= NULL
;
726 union sockunion addr
, mask
, brd
;
727 char ifname
[INTERFACE_NAMSIZ
];
732 ifname
[0] = ifname
[INTERFACE_NAMSIZ
- 1] = '\0';
734 /* Allocate and read address information. */
735 ifam_read_mesg (ifam
, &addr
, &mask
, &brd
, ifname
, &ifnlen
);
737 if ((ifp
= if_lookup_by_index(ifam
->ifam_index
)) == NULL
)
739 zlog_warn ("%s: no interface for ifname %s, index %d",
740 __func__
, ifname
, ifam
->ifam_index
);
744 if (ifnlen
&& strncmp (ifp
->name
, ifname
, INTERFACE_NAMSIZ
))
747 /* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD
748 field contains a broadcast address or a peer address, so we are forced to
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
))
766 if (ifam
->ifam_type
== RTM_NEWADDR
)
767 connected_add_ipv4 (ifp
, flags
, &addr
.sin
.sin_addr
,
768 ip_masklen (mask
.sin
.sin_addr
),
770 (isalias
? ifname
: NULL
));
772 connected_delete_ipv4 (ifp
, flags
, &addr
.sin
.sin_addr
,
773 ip_masklen (mask
.sin
.sin_addr
),
778 /* Unset interface index from link-local address when IPv6 stack
780 if (IN6_IS_ADDR_LINKLOCAL (&addr
.sin6
.sin6_addr
))
782 SET_IN6_LINKLOCAL_IFINDEX (addr
.sin6
.sin6_addr
, 0);
785 if (ifam
->ifam_type
== RTM_NEWADDR
)
786 connected_add_ipv6 (ifp
, flags
, &addr
.sin6
.sin6_addr
,
787 ip6_masklen (mask
.sin6
.sin6_addr
),
789 (isalias
? ifname
: NULL
));
791 connected_delete_ipv6 (ifp
,
792 &addr
.sin6
.sin6_addr
,
793 ip6_masklen (mask
.sin6
.sin6_addr
),
794 &brd
.sin6
.sin6_addr
);
796 #endif /* HAVE_IPV6 */
798 /* Unsupported family silently ignore... */
802 /* Check interface flag for implicit up of the interface. */
806 /* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange.
807 * See comments for SUNOS_5 in interface.c::if_flags_mangle.
809 * Here we take care of case where the real IFF_UP was previously
810 * unset (as kept in struct zebra_if.primary_state) and the mangled
811 * IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned
812 * to unset due to the lost non-primary address having DELADDR'd.
814 * we must delete the interface, because in between here and next
815 * event for this interface-name the administrator could unplumb
816 * and replumb the interface.
819 if_delete_update (ifp
);
825 /* Interface function for reading kernel routing table information. */
827 rtm_read_mesg (struct rt_msghdr
*rtm
,
828 union sockunion
*dest
,
829 union sockunion
*mask
,
830 union sockunion
*gate
,
836 /* Pnt points out socket data start point. */
837 pnt
= (caddr_t
)(rtm
+ 1);
838 end
= ((caddr_t
)rtm
) + rtm
->rtm_msglen
;
840 /* rt_msghdr version check. */
841 if (rtm
->rtm_version
!= RTM_VERSION
)
842 zlog (NULL
, LOG_WARNING
,
843 "Routing message version different %d should be %d."
844 "This may cause problem\n", rtm
->rtm_version
, RTM_VERSION
);
846 /* Be sure structure is cleared */
847 memset (dest
, 0, sizeof (union sockunion
));
848 memset (gate
, 0, sizeof (union sockunion
));
849 memset (mask
, 0, sizeof (union sockunion
));
851 /* We fetch each socket variable into sockunion. */
852 RTA_ADDR_GET (dest
, RTA_DST
, rtm
->rtm_addrs
, pnt
);
853 RTA_ADDR_GET (gate
, RTA_GATEWAY
, rtm
->rtm_addrs
, pnt
);
854 RTA_ATTR_GET (mask
, RTA_NETMASK
, rtm
->rtm_addrs
, pnt
);
855 RTA_ADDR_GET (NULL
, RTA_GENMASK
, rtm
->rtm_addrs
, pnt
);
856 RTA_NAME_GET (ifname
, RTA_IFP
, rtm
->rtm_addrs
, pnt
, *ifnlen
);
857 RTA_ADDR_GET (NULL
, RTA_IFA
, rtm
->rtm_addrs
, pnt
);
858 RTA_ADDR_GET (NULL
, RTA_AUTHOR
, rtm
->rtm_addrs
, pnt
);
859 RTA_ADDR_GET (NULL
, RTA_BRD
, rtm
->rtm_addrs
, pnt
);
861 /* If there is netmask information set it's family same as
863 if (rtm
->rtm_addrs
& RTA_NETMASK
)
864 mask
->sa
.sa_family
= dest
->sa
.sa_family
;
866 /* Assert read up to the end of pointer. */
868 zlog (NULL
, LOG_WARNING
, "rtm_read() doesn't read all socket data.");
870 return rtm
->rtm_flags
;
874 rtm_read (struct rt_msghdr
*rtm
)
878 union sockunion dest
, mask
, gate
;
879 char ifname
[INTERFACE_NAMSIZ
+ 1];
884 /* Read destination and netmask and gateway from rtm message
886 flags
= rtm_read_mesg (rtm
, &dest
, &mask
, &gate
, ifname
, &ifnlen
);
887 if (!(flags
& RTF_DONE
))
889 if (IS_ZEBRA_DEBUG_KERNEL
)
890 zlog_debug ("%s: got rtm of type %d (%s)", __func__
, rtm
->rtm_type
,
891 lookup (rtm_type_str
, rtm
->rtm_type
));
893 #ifdef RTF_CLONED /*bsdi, netbsd 1.6*/
894 if (flags
& RTF_CLONED
)
897 #ifdef RTF_WASCLONED /*freebsd*/
898 if (flags
& RTF_WASCLONED
)
902 if ((rtm
->rtm_type
== RTM_ADD
|| rtm
->rtm_type
== RTM_CHANGE
) && ! (flags
& RTF_UP
))
905 /* This is connected route. */
906 if (! (flags
& RTF_GATEWAY
))
909 if (flags
& RTF_PROTO1
)
910 SET_FLAG (zebra_flags
, ZEBRA_FLAG_SELFROUTE
);
912 /* This is persistent route. */
913 if (flags
& RTF_STATIC
)
914 SET_FLAG (zebra_flags
, ZEBRA_FLAG_STATIC
);
916 /* This is a reject or blackhole route */
917 if (flags
& RTF_REJECT
)
918 SET_FLAG (zebra_flags
, ZEBRA_FLAG_REJECT
);
919 if (flags
& RTF_BLACKHOLE
)
920 SET_FLAG (zebra_flags
, ZEBRA_FLAG_BLACKHOLE
);
922 if (dest
.sa
.sa_family
== AF_INET
)
927 p
.u
.prefix4
= dest
.sin
.sin_addr
;
928 if (flags
& RTF_HOST
)
929 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
931 p
.prefixlen
= ip_masklen (mask
.sin
.sin_addr
);
933 /* Catch self originated messages and match them against our current RIB.
934 * At the same time, ignore unconfirmed messages, they should be tracked
935 * by rtm_write() and kernel_rtm_ipv4().
937 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
)
939 char buf
[PREFIX_STRLEN
], gate_buf
[INET_ADDRSTRLEN
];
941 if (! IS_ZEBRA_DEBUG_RIB
)
943 ret
= rib_lookup_ipv4_route (&p
, &gate
, VRF_DEFAULT
);
944 prefix2str (&p
, buf
, sizeof(buf
));
945 switch (rtm
->rtm_type
)
950 /* The kernel notifies us about a new route in FIB created by us.
951 Do we have a correspondent entry in our RIB? */
954 case ZEBRA_RIB_NOTFOUND
:
955 zlog_debug ("%s: %s %s: desync: RR isn't yet in RIB, while already in FIB",
956 __func__
, lookup (rtm_type_str
, rtm
->rtm_type
), buf
);
958 case ZEBRA_RIB_FOUND_CONNECTED
:
959 case ZEBRA_RIB_FOUND_NOGATE
:
960 inet_ntop (AF_INET
, &gate
.sin
.sin_addr
, gate_buf
, INET_ADDRSTRLEN
);
961 zlog_debug ("%s: %s %s: desync: RR is in RIB, but gate differs (ours is %s)",
962 __func__
, lookup (rtm_type_str
, rtm
->rtm_type
), buf
, gate_buf
);
964 case ZEBRA_RIB_FOUND_EXACT
: /* RIB RR == FIB RR */
965 zlog_debug ("%s: %s %s: done Ok",
966 __func__
, lookup (rtm_type_str
, rtm
->rtm_type
), buf
);
967 rib_lookup_and_dump (&p
, VRF_DEFAULT
);
973 /* The kernel notifies us about a route deleted by us. Do we still
974 have it in the RIB? Do we have anything instead? */
977 case ZEBRA_RIB_FOUND_EXACT
:
978 zlog_debug ("%s: %s %s: desync: RR is still in RIB, while already not in FIB",
979 __func__
, lookup (rtm_type_str
, rtm
->rtm_type
), buf
);
980 rib_lookup_and_dump (&p
, VRF_DEFAULT
);
982 case ZEBRA_RIB_FOUND_CONNECTED
:
983 case ZEBRA_RIB_FOUND_NOGATE
:
984 zlog_debug ("%s: %s %s: desync: RR is still in RIB, plus gate differs",
985 __func__
, lookup (rtm_type_str
, rtm
->rtm_type
), buf
);
986 rib_lookup_and_dump (&p
, VRF_DEFAULT
);
988 case ZEBRA_RIB_NOTFOUND
: /* RIB RR == FIB RR */
989 zlog_debug ("%s: %s %s: done Ok",
990 __func__
, lookup (rtm_type_str
, rtm
->rtm_type
), buf
);
991 rib_lookup_and_dump (&p
, VRF_DEFAULT
);
997 zlog_debug ("%s: %s: warning: loopback RTM of type %s received",
998 __func__
, buf
, lookup (rtm_type_str
, rtm
->rtm_type
));
1003 /* Change, delete the old prefix, we have no further information
1004 * to specify the route really
1006 if (rtm
->rtm_type
== RTM_CHANGE
)
1007 rib_delete (AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1008 0, zebra_flags
, &p
, NULL
, 0, 0);
1010 union g_addr ggate
= { .ipv4
= gate
.sin
.sin_addr
};
1011 if (rtm
->rtm_type
== RTM_GET
1012 || rtm
->rtm_type
== RTM_ADD
1013 || rtm
->rtm_type
== RTM_CHANGE
)
1014 rib_add (AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
, 0, zebra_flags
,
1015 &p
, &ggate
, NULL
, 0, 0, 0, 0, 0);
1017 rib_delete (AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1018 0, zebra_flags
, &p
, &ggate
, 0, 0);
1020 if (dest
.sa
.sa_family
== AF_INET6
)
1022 /* One day we might have a debug section here like one in the
1023 * IPv4 case above. Just ignore own messages at the moment.
1025 if (rtm
->rtm_type
!= RTM_GET
&& rtm
->rtm_pid
== pid
)
1028 ifindex_t ifindex
= 0;
1030 p
.family
= AF_INET6
;
1031 p
.u
.prefix6
= dest
.sin6
.sin6_addr
;
1032 if (flags
& RTF_HOST
)
1033 p
.prefixlen
= IPV6_MAX_PREFIXLEN
;
1035 p
.prefixlen
= ip6_masklen (mask
.sin6
.sin6_addr
);
1038 if (IN6_IS_ADDR_LINKLOCAL (&gate
.sin6
.sin6_addr
))
1040 ifindex
= IN6_LINKLOCAL_IFINDEX (gate
.sin6
.sin6_addr
);
1041 SET_IN6_LINKLOCAL_IFINDEX (gate
.sin6
.sin6_addr
, 0);
1045 /* CHANGE: delete the old prefix, we have no further information
1046 * to specify the route really
1048 if (rtm
->rtm_type
== RTM_CHANGE
)
1049 rib_delete (AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1050 0, zebra_flags
, &p
, NULL
, 0, 0);
1052 union g_addr ggate
= { .ipv6
= gate
.sin6
.sin6_addr
};
1053 if (rtm
->rtm_type
== RTM_GET
1054 || rtm
->rtm_type
== RTM_ADD
1055 || rtm
->rtm_type
== RTM_CHANGE
)
1056 rib_add (AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1057 0, zebra_flags
, &p
, &ggate
, NULL
, ifindex
,
1060 rib_delete (AFI_IP6
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
,
1061 0, zebra_flags
, &p
, &ggate
, ifindex
, 0);
1065 /* Interface function for the kernel routing table updates. Support
1066 * for RTM_CHANGE will be needed.
1067 * Exported only for rt_socket.c
1070 rtm_write (int message
,
1071 union sockunion
*dest
,
1072 union sockunion
*mask
,
1073 union sockunion
*gate
,
1074 union sockunion
*mpls
,
1081 struct interface
*ifp
;
1083 /* Sequencial number of routing message. */
1084 static int msg_seq
= 0;
1086 /* Struct of rt_msghdr and buffer for storing socket's data. */
1089 struct rt_msghdr rtm
;
1093 if (routing_sock
< 0)
1094 return ZEBRA_ERR_EPERM
;
1096 /* Clear and set rt_msghdr values */
1097 memset (&msg
, 0, sizeof (struct rt_msghdr
));
1098 msg
.rtm
.rtm_version
= RTM_VERSION
;
1099 msg
.rtm
.rtm_type
= message
;
1100 msg
.rtm
.rtm_seq
= msg_seq
++;
1101 msg
.rtm
.rtm_addrs
= RTA_DST
;
1102 msg
.rtm
.rtm_addrs
|= RTA_GATEWAY
;
1103 msg
.rtm
.rtm_flags
= RTF_UP
;
1105 msg
.rtm
.rtm_flags
|= RTF_MPATH
;
1106 msg
.rtm
.rtm_fmask
= RTF_MPLS
;
1108 msg
.rtm
.rtm_index
= index
;
1112 msg
.rtm
.rtm_rmx
.rmx_hopcount
= metric
;
1113 msg
.rtm
.rtm_inits
|= RTV_HOPCOUNT
;
1116 ifp
= if_lookup_by_index (index
);
1118 if (gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
))
1119 msg
.rtm
.rtm_flags
|= RTF_GATEWAY
;
1121 /* When RTF_CLONING is unavailable on BSD, should we set some
1122 * other flag instead?
1125 if (! gate
&& (message
== RTM_ADD
|| message
== RTM_CHANGE
) && ifp
&&
1126 (ifp
->flags
& IFF_POINTOPOINT
) == 0)
1127 msg
.rtm
.rtm_flags
|= RTF_CLONING
;
1128 #endif /* RTF_CLONING */
1130 /* If no protocol specific gateway is specified, use link
1131 address for gateway. */
1136 char dest_buf
[INET_ADDRSTRLEN
] = "NULL", mask_buf
[INET_ADDRSTRLEN
] = "255.255.255.255";
1138 inet_ntop (AF_INET
, &dest
->sin
.sin_addr
, dest_buf
, INET_ADDRSTRLEN
);
1140 inet_ntop (AF_INET
, &mask
->sin
.sin_addr
, mask_buf
, INET_ADDRSTRLEN
);
1141 zlog_warn ("%s: %s/%s: gate == NULL and no gateway found for ifindex %d",
1142 __func__
, dest_buf
, mask_buf
, index
);
1145 gate
= (union sockunion
*) &((struct zebra_if
*)ifp
->info
)->sdl
;
1149 msg
.rtm
.rtm_addrs
|= RTA_NETMASK
;
1150 else if (message
== RTM_ADD
|| message
== RTM_CHANGE
)
1151 msg
.rtm
.rtm_flags
|= RTF_HOST
;
1156 msg
.rtm
.rtm_addrs
|= RTA_SRC
;
1157 msg
.rtm
.rtm_flags
|= RTF_MPLS
;
1159 if (mpls
->smpls
.smpls_label
!= htonl (MPLS_IMP_NULL_LABEL
<< MPLS_LABEL_OFFSET
))
1160 msg
.rtm
.rtm_mpls
= MPLS_OP_PUSH
;
1164 /* Tagging route with flags */
1165 msg
.rtm
.rtm_flags
|= (RTF_PROTO1
);
1167 /* Additional flags. */
1168 if (zebra_flags
& ZEBRA_FLAG_BLACKHOLE
)
1169 msg
.rtm
.rtm_flags
|= RTF_BLACKHOLE
;
1170 if (zebra_flags
& ZEBRA_FLAG_REJECT
)
1171 msg
.rtm
.rtm_flags
|= RTF_REJECT
;
1174 #define SOCKADDRSET(X,R) \
1175 if (msg.rtm.rtm_addrs & (R)) \
1177 int len = SAROUNDUP (X); \
1178 memcpy (pnt, (caddr_t)(X), len); \
1182 pnt
= (caddr_t
) msg
.buf
;
1184 /* Write each socket data into rtm message buffer */
1185 SOCKADDRSET (dest
, RTA_DST
);
1186 SOCKADDRSET (gate
, RTA_GATEWAY
);
1187 SOCKADDRSET (mask
, RTA_NETMASK
);
1189 SOCKADDRSET (mpls
, RTA_SRC
);
1192 msg
.rtm
.rtm_msglen
= pnt
- (caddr_t
) &msg
;
1194 ret
= write (routing_sock
, &msg
, msg
.rtm
.rtm_msglen
);
1196 if (ret
!= msg
.rtm
.rtm_msglen
)
1198 if (errno
== EEXIST
)
1199 return ZEBRA_ERR_RTEXIST
;
1200 if (errno
== ENETUNREACH
)
1201 return ZEBRA_ERR_RTUNREACH
;
1203 return ZEBRA_ERR_RTNOEXIST
;
1205 zlog_warn ("%s: write : %s (%d)", __func__
, safe_strerror (errno
), errno
);
1206 return ZEBRA_ERR_KERNEL
;
1208 return ZEBRA_ERR_NOERROR
;
1213 #include "zebra/zserv.h"
1215 /* For debug purpose. */
1217 rtmsg_debug (struct rt_msghdr
*rtm
)
1219 zlog_debug ("Kernel: Len: %d Type: %s", rtm
->rtm_msglen
, lookup (rtm_type_str
, rtm
->rtm_type
));
1220 rtm_flag_dump (rtm
->rtm_flags
);
1221 zlog_debug ("Kernel: message seq %d", rtm
->rtm_seq
);
1222 zlog_debug ("Kernel: pid %lld, rtm_addrs 0x%x",
1223 (long long)rtm
->rtm_pid
, rtm
->rtm_addrs
);
1226 /* This is pretty gross, better suggestions welcome -- mhandler */
1229 #define RTAX_MAX RTA_NUMBITS
1232 #endif /* RTA_NUMBITS */
1233 #endif /* RTAX_MAX */
1235 /* Kernel routing table and interface updates via routing socket. */
1237 kernel_read (struct thread
*thread
)
1241 struct rt_msghdr
*rtm
;
1244 * This must be big enough for any message the kernel might send.
1245 * Rather than determining how many sockaddrs of what size might be
1246 * in each particular message, just use RTAX_MAX of sockaddr_storage
1247 * for each. Note that the sockaddrs must be after each message
1248 * definition, or rather after whichever happens to be the largest,
1249 * since the buffer needs to be big enough for a message and the
1250 * sockaddrs together.
1254 /* Routing information. */
1257 struct rt_msghdr rtm
;
1258 struct sockaddr_storage addr
[RTAX_MAX
];
1261 /* Interface information. */
1264 struct if_msghdr ifm
;
1265 struct sockaddr_storage addr
[RTAX_MAX
];
1268 /* Interface address information. */
1271 struct ifa_msghdr ifa
;
1272 struct sockaddr_storage addr
[RTAX_MAX
];
1275 #ifdef RTM_IFANNOUNCE
1276 /* Interface arrival/departure */
1279 struct if_announcemsghdr ifan
;
1280 struct sockaddr_storage addr
[RTAX_MAX
];
1282 #endif /* RTM_IFANNOUNCE */
1286 /* Fetch routing socket. */
1287 sock
= THREAD_FD (thread
);
1289 nbytes
= read (sock
, &buf
, sizeof buf
);
1293 if (nbytes
< 0 && errno
!= EWOULDBLOCK
&& errno
!= EAGAIN
)
1294 zlog_warn ("routing socket error: %s", safe_strerror (errno
));
1298 thread_add_read (zebrad
.master
, kernel_read
, NULL
, sock
);
1300 if (IS_ZEBRA_DEBUG_KERNEL
)
1301 rtmsg_debug (&buf
.r
.rtm
);
1306 * Ensure that we didn't drop any data, so that processing routines
1307 * can assume they have the whole message.
1309 if (rtm
->rtm_msglen
!= nbytes
)
1311 zlog_warn ("kernel_read: rtm->rtm_msglen %d, nbytes %d, type %d\n",
1312 rtm
->rtm_msglen
, nbytes
, rtm
->rtm_type
);
1316 switch (rtm
->rtm_type
)
1324 ifm_read (&buf
.im
.ifm
);
1328 ifam_read (&buf
.ia
.ifa
);
1330 #ifdef RTM_IFANNOUNCE
1331 case RTM_IFANNOUNCE
:
1332 ifan_read (&buf
.ian
.ifan
);
1334 #endif /* RTM_IFANNOUNCE */
1336 if (IS_ZEBRA_DEBUG_KERNEL
)
1337 zlog_debug("Unprocessed RTM_type: %d", rtm
->rtm_type
);
1343 /* Make routing socket. */
1345 routing_socket (struct zebra_ns
*zns
)
1347 if ( zserv_privs
.change (ZPRIVS_RAISE
) )
1348 zlog_err ("routing_socket: Can't raise privileges");
1350 routing_sock
= socket (AF_ROUTE
, SOCK_RAW
, 0);
1352 if (routing_sock
< 0)
1354 if ( zserv_privs
.change (ZPRIVS_LOWER
) )
1355 zlog_err ("routing_socket: Can't lower privileges");
1356 zlog_warn ("Can't init kernel routing socket");
1360 /* XXX: Socket should be NONBLOCK, however as we currently
1361 * discard failed writes, this will lead to inconsistencies.
1362 * For now, socket must be blocking.
1364 /*if (fcntl (routing_sock, F_SETFL, O_NONBLOCK) < 0)
1365 zlog_warn ("Can't set O_NONBLOCK to routing socket");*/
1367 if ( zserv_privs
.change (ZPRIVS_LOWER
) )
1368 zlog_err ("routing_socket: Can't lower privileges");
1370 /* kernel_read needs rewrite. */
1371 thread_add_read (zebrad
.master
, kernel_read
, NULL
, routing_sock
);
1374 /* Exported interface function. This function simply calls
1375 routing_socket (). */
1377 kernel_init (struct zebra_ns
*zns
)
1379 routing_socket (zns
);
1383 kernel_terminate (struct zebra_ns
*zns
)