2 * Kernel routing table updates by routing socket.
3 * Copyright (C) 1997, 98 Kunihiro Ishiguro
5 * This file is part of GNU Zebra.
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 #include <netmpls/mpls.h>
32 #include "sockunion.h"
36 #include "lib_errors.h"
38 #include "zebra/debug.h"
39 #include "zebra/rib.h"
41 #include "zebra/kernel_socket.h"
42 #include "zebra/zebra_mpls.h"
43 #include "zebra/zebra_errors.h"
45 extern struct zebra_privs_t zserv_privs
;
48 static int kernel_rtm_add_labels(struct mpls_label_stack
*nh_label
,
49 struct sockaddr_mpls
*smpls
)
51 if (nh_label
->num_labels
> 1) {
52 flog_warn(EC_ZEBRA_MAX_LABELS_PUSH
,
53 "%s: can't push %u labels at once (maximum is 1)",
54 __func__
, nh_label
->num_labels
);
58 memset(smpls
, 0, sizeof(*smpls
));
59 smpls
->smpls_len
= sizeof(*smpls
);
60 smpls
->smpls_family
= AF_MPLS
;
61 smpls
->smpls_label
= htonl(nh_label
->label
[0] << MPLS_LABEL_OFFSET
);
67 /* Interface between zebra message and rtm message. */
68 static int kernel_rtm(int cmd
, const struct prefix
*p
,
69 const struct nexthop_group
*ng
, uint32_t metric
)
72 union sockunion sin_dest
, sin_mask
, sin_gate
;
74 struct sockaddr_mpls smpls
;
76 union sockunion
*smplsp
= NULL
;
77 struct nexthop
*nexthop
;
79 ifindex_t ifindex
= 0;
82 char gate_buf
[INET6_BUFSIZ
];
83 char prefix_buf
[PREFIX_STRLEN
];
84 enum blackhole_type bh_type
= BLACKHOLE_UNSPEC
;
86 prefix2str(p
, prefix_buf
, sizeof(prefix_buf
));
89 * We only have the ability to ADD or DELETE at this point
92 if (cmd
!= RTM_ADD
&& cmd
!= RTM_DELETE
) {
93 if (IS_ZEBRA_DEBUG_KERNEL
)
94 zlog_debug("%s: %s odd command %s",
96 lookup_msg(rtm_type_str
, cmd
, NULL
));
100 memset(&sin_dest
, 0, sizeof(sin_dest
));
101 memset(&sin_gate
, 0, sizeof(sin_gate
));
102 memset(&sin_mask
, 0, sizeof(sin_mask
));
106 sin_dest
.sin
.sin_family
= AF_INET
;
107 sin_dest
.sin
.sin_addr
= p
->u
.prefix4
;
108 sin_gate
.sin
.sin_family
= AF_INET
;
109 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
110 sin_dest
.sin
.sin_len
= sizeof(struct sockaddr_in
);
111 sin_gate
.sin
.sin_len
= sizeof(struct sockaddr_in
);
112 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
115 sin_dest
.sin6
.sin6_family
= AF_INET6
;
116 sin_dest
.sin6
.sin6_addr
= p
->u
.prefix6
;
117 sin_gate
.sin6
.sin6_family
= AF_INET6
;
118 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
119 sin_dest
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
120 sin_gate
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
121 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
126 for (ALL_NEXTHOPS_PTR(ng
, nexthop
)) {
128 * We only want to use the actual good nexthops
130 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
) ||
131 !CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
136 snprintf(gate_buf
, sizeof(gate_buf
), "NULL");
138 switch (nexthop
->type
) {
139 case NEXTHOP_TYPE_IPV4
:
140 case NEXTHOP_TYPE_IPV4_IFINDEX
:
141 sin_gate
.sin
.sin_addr
= nexthop
->gate
.ipv4
;
142 sin_gate
.sin
.sin_family
= AF_INET
;
143 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
144 sin_gate
.sin
.sin_len
= sizeof(struct sockaddr_in
);
145 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
146 ifindex
= nexthop
->ifindex
;
149 case NEXTHOP_TYPE_IPV6
:
150 case NEXTHOP_TYPE_IPV6_IFINDEX
:
151 sin_gate
.sin6
.sin6_addr
= nexthop
->gate
.ipv6
;
152 sin_gate
.sin6
.sin6_family
= AF_INET6
;
153 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
154 sin_gate
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
155 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
156 ifindex
= nexthop
->ifindex
;
157 /* Under kame set interface index to link local address */
160 #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
162 (a).s6_addr[2] = ((i) >> 8) & 0xff; \
163 (a).s6_addr[3] = (i)&0xff; \
166 if (IN6_IS_ADDR_LINKLOCAL(&sin_gate
.sin6
.sin6_addr
))
167 SET_IN6_LINKLOCAL_IFINDEX(
168 sin_gate
.sin6
.sin6_addr
,
174 case NEXTHOP_TYPE_IFINDEX
:
175 ifindex
= nexthop
->ifindex
;
177 case NEXTHOP_TYPE_BLACKHOLE
:
178 bh_type
= nexthop
->bh_type
;
181 struct in_addr loopback
;
183 loopback
.s_addr
= htonl(INADDR_LOOPBACK
);
184 sin_gate
.sin
.sin_addr
= loopback
;
185 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
186 sin_gate
.sin
.sin_len
=
187 sizeof(struct sockaddr_in
);
188 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
192 struct in6_addr loopback
;
194 inet_pton(AF_INET6
, "::1", &loopback
);
196 sin_gate
.sin6
.sin6_addr
= loopback
;
197 sin_gate
.sin6
.sin6_family
= AF_INET6
;
199 #ifdef HAVE_STRUCTSOCKADDR_SA_LEN
200 sin_gate
.sin6
.sin6_len
=
201 sizeof(struct sockaddr_in6
);
202 #endif /* HAVE_STRUCTSOCKADDR_SA_LEN */
210 masklen2ip(p
->prefixlen
, &sin_mask
.sin
.sin_addr
);
211 sin_mask
.sin
.sin_family
= AF_INET
;
212 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
213 sin_mask
.sin
.sin_len
= sizeof(struct sockaddr_in
);
214 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
217 masklen2ip6(p
->prefixlen
, &sin_mask
.sin6
.sin6_addr
);
218 sin_mask
.sin6
.sin6_family
= AF_INET6
;
219 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
220 sin_mask
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
221 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
226 if (nexthop
->nh_label
) {
227 if (kernel_rtm_add_labels(nexthop
->nh_label
,
230 smplsp
= (union sockunion
*)&smpls
;
233 error
= rtm_write(cmd
, &sin_dest
, &sin_mask
,
234 gate
? &sin_gate
: NULL
, smplsp
,
235 ifindex
, bh_type
, metric
);
237 if (IS_ZEBRA_DEBUG_KERNEL
) {
240 "%s: %s: attention! gate not found for re",
241 __func__
, prefix_buf
);
246 &sin_gate
.sin
.sin_addr
,
247 gate_buf
, sizeof(gate_buf
));
252 &sin_gate
.sin6
.sin6_addr
,
253 gate_buf
, sizeof(gate_buf
));
257 snprintf(gate_buf
, sizeof(gate_buf
),
264 /* We only flag nexthops as being in FIB if
265 * rtm_write() did its work. */
266 case ZEBRA_ERR_NOERROR
:
268 if (IS_ZEBRA_DEBUG_KERNEL
)
269 zlog_debug("%s: %s: successfully did NH %s",
270 __func__
, prefix_buf
, gate_buf
);
272 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
275 /* The only valid case for this error is
276 * kernel's failure to install a multipath
277 * route, which is common for FreeBSD. This
278 * should be ignored silently, but logged as an error
281 case ZEBRA_ERR_RTEXIST
:
283 flog_err(EC_LIB_SYSTEM_CALL
,
284 "%s: rtm_write() returned %d for command %d",
285 __func__
, error
, cmd
);
288 /* Note any unexpected status returns */
292 "%s: %s: rtm_write() unexpectedly returned %d for command %s",
293 __func__
, prefix_buf
, error
,
294 lookup_msg(rtm_type_str
, cmd
, NULL
));
297 } /* for (ALL_NEXTHOPS(...))*/
299 /* If there was no useful nexthop, then complain. */
300 if (nexthop_num
== 0) {
301 if (IS_ZEBRA_DEBUG_KERNEL
)
303 "%s: No useful nexthops were found in RIB prefix %s",
304 __func__
, prefix_buf
);
312 * Update or delete a prefix from the kernel,
313 * using info from a dataplane context struct.
315 enum zebra_dplane_result
kernel_route_update(struct zebra_dplane_ctx
*ctx
)
317 enum zebra_dplane_result res
= ZEBRA_DPLANE_REQUEST_SUCCESS
;
318 uint32_t type
, old_type
;
320 if (dplane_ctx_get_src(ctx
) != NULL
) {
321 zlog_err("route add: IPv6 sourcedest routes unsupported!");
322 return ZEBRA_DPLANE_REQUEST_FAILURE
;
325 type
= dplane_ctx_get_type(ctx
);
326 old_type
= dplane_ctx_get_old_type(ctx
);
328 frr_with_privs(&zserv_privs
) {
330 if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_DELETE
) {
331 if (!RSYSTEM_ROUTE(type
))
332 kernel_rtm(RTM_DELETE
, dplane_ctx_get_dest(ctx
),
333 dplane_ctx_get_ng(ctx
),
334 dplane_ctx_get_metric(ctx
));
335 } else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_INSTALL
) {
336 if (!RSYSTEM_ROUTE(type
))
337 kernel_rtm(RTM_ADD
, dplane_ctx_get_dest(ctx
),
338 dplane_ctx_get_ng(ctx
),
339 dplane_ctx_get_metric(ctx
));
340 } else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_UPDATE
) {
341 /* Must do delete and add separately -
342 * no update available
344 if (!RSYSTEM_ROUTE(old_type
))
345 kernel_rtm(RTM_DELETE
, dplane_ctx_get_dest(ctx
),
346 dplane_ctx_get_old_ng(ctx
),
347 dplane_ctx_get_old_metric(ctx
));
349 if (!RSYSTEM_ROUTE(type
))
350 kernel_rtm(RTM_ADD
, dplane_ctx_get_dest(ctx
),
351 dplane_ctx_get_ng(ctx
),
352 dplane_ctx_get_metric(ctx
));
354 zlog_err("Invalid routing socket update op %s (%u)",
355 dplane_op2str(dplane_ctx_get_op(ctx
)),
356 dplane_ctx_get_op(ctx
));
357 res
= ZEBRA_DPLANE_REQUEST_FAILURE
;
359 } /* Elevated privs */
361 if (RSYSTEM_ROUTE(type
)
362 && dplane_ctx_get_op(ctx
) != DPLANE_OP_ROUTE_DELETE
) {
363 struct nexthop
*nexthop
;
365 for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx
), nexthop
)) {
366 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
369 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)) {
370 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
378 enum zebra_dplane_result
kernel_nexthop_update(struct zebra_dplane_ctx
*ctx
)
380 return ZEBRA_DPLANE_REQUEST_SUCCESS
;
383 int kernel_neigh_update(int add
, int ifindex
, uint32_t addr
, char *lla
,
384 int llalen
, ns_id_t ns_id
)
390 /* NYI on routing-socket platforms, but we've always returned 'success'... */
391 enum zebra_dplane_result
kernel_neigh_update_ctx(struct zebra_dplane_ctx
*ctx
)
393 return ZEBRA_DPLANE_REQUEST_SUCCESS
;
396 extern int kernel_get_ipmr_sg_stats(struct zebra_vrf
*zvrf
, void *mroute
)
402 * Update MAC, using dataplane context object. No-op here for now.
404 enum zebra_dplane_result
kernel_mac_update_ctx(struct zebra_dplane_ctx
*ctx
)
406 return ZEBRA_DPLANE_REQUEST_SUCCESS
;
409 extern int kernel_interface_set_master(struct interface
*master
,
410 struct interface
*slave
)
415 uint32_t kernel_get_speed(struct interface
*ifp
, int *error
)
420 #endif /* !HAVE_NETLINK */