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 "
54 "once (maximum is 1)",
55 __func__
, nh_label
->num_labels
);
59 memset(smpls
, 0, sizeof(*smpls
));
60 smpls
->smpls_len
= sizeof(*smpls
);
61 smpls
->smpls_family
= AF_MPLS
;
62 smpls
->smpls_label
= htonl(nh_label
->label
[0] << MPLS_LABEL_OFFSET
);
68 /* Interface between zebra message and rtm message. */
69 static int kernel_rtm(int cmd
, const struct prefix
*p
,
70 const struct nexthop_group
*ng
, uint32_t metric
)
73 union sockunion sin_dest
, sin_mask
, sin_gate
;
75 struct sockaddr_mpls smpls
;
77 union sockunion
*smplsp
= NULL
;
78 struct nexthop
*nexthop
;
80 ifindex_t ifindex
= 0;
83 char gate_buf
[INET6_BUFSIZ
];
84 char prefix_buf
[PREFIX_STRLEN
];
85 enum blackhole_type bh_type
= BLACKHOLE_UNSPEC
;
87 prefix2str(p
, prefix_buf
, sizeof(prefix_buf
));
90 * We only have the ability to ADD or DELETE at this point
93 if (cmd
!= RTM_ADD
&& cmd
!= RTM_DELETE
) {
94 if (IS_ZEBRA_DEBUG_KERNEL
)
95 zlog_debug("%s: %s odd command %s",
97 lookup_msg(rtm_type_str
, cmd
, NULL
));
101 memset(&sin_dest
, 0, sizeof(sin_dest
));
102 memset(&sin_gate
, 0, sizeof(sin_gate
));
103 memset(&sin_mask
, 0, sizeof(sin_mask
));
107 sin_dest
.sin
.sin_family
= AF_INET
;
108 sin_dest
.sin
.sin_addr
= p
->u
.prefix4
;
109 sin_gate
.sin
.sin_family
= AF_INET
;
110 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
111 sin_dest
.sin
.sin_len
= sizeof(struct sockaddr_in
);
112 sin_gate
.sin
.sin_len
= sizeof(struct sockaddr_in
);
113 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
116 sin_dest
.sin6
.sin6_family
= AF_INET6
;
117 sin_dest
.sin6
.sin6_addr
= p
->u
.prefix6
;
118 sin_gate
.sin6
.sin6_family
= AF_INET6
;
119 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
120 sin_dest
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
121 sin_gate
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
122 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
127 for (ALL_NEXTHOPS_PTR(ng
, nexthop
)) {
129 * We only want to use the actual good nexthops
131 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
) ||
132 !CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
137 snprintf(gate_buf
, sizeof(gate_buf
), "NULL");
139 switch (nexthop
->type
) {
140 case NEXTHOP_TYPE_IPV4
:
141 case NEXTHOP_TYPE_IPV4_IFINDEX
:
142 sin_gate
.sin
.sin_addr
= nexthop
->gate
.ipv4
;
143 sin_gate
.sin
.sin_family
= AF_INET
;
144 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
145 sin_gate
.sin
.sin_len
= sizeof(struct sockaddr_in
);
146 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
147 ifindex
= nexthop
->ifindex
;
150 case NEXTHOP_TYPE_IPV6
:
151 case NEXTHOP_TYPE_IPV6_IFINDEX
:
152 sin_gate
.sin6
.sin6_addr
= nexthop
->gate
.ipv6
;
153 sin_gate
.sin6
.sin6_family
= AF_INET6
;
154 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
155 sin_gate
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
156 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
157 ifindex
= nexthop
->ifindex
;
158 /* Under kame set interface index to link local address */
161 #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
163 (a).s6_addr[2] = ((i) >> 8) & 0xff; \
164 (a).s6_addr[3] = (i)&0xff; \
167 if (IN6_IS_ADDR_LINKLOCAL(&sin_gate
.sin6
.sin6_addr
))
168 SET_IN6_LINKLOCAL_IFINDEX(
169 sin_gate
.sin6
.sin6_addr
,
175 case NEXTHOP_TYPE_IFINDEX
:
176 ifindex
= nexthop
->ifindex
;
178 case NEXTHOP_TYPE_BLACKHOLE
:
179 bh_type
= nexthop
->bh_type
;
182 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 */
193 zlog_warn("v6 blackhole routes have not been programmed yet");
200 masklen2ip(p
->prefixlen
, &sin_mask
.sin
.sin_addr
);
201 sin_mask
.sin
.sin_family
= AF_INET
;
202 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
203 sin_mask
.sin
.sin_len
= sizeof(struct sockaddr_in
);
204 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
207 masklen2ip6(p
->prefixlen
, &sin_mask
.sin6
.sin6_addr
);
208 sin_mask
.sin6
.sin6_family
= AF_INET6
;
209 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
210 sin_mask
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
211 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
216 if (nexthop
->nh_label
) {
217 if (kernel_rtm_add_labels(nexthop
->nh_label
,
220 smplsp
= (union sockunion
*)&smpls
;
223 error
= rtm_write(cmd
, &sin_dest
, &sin_mask
,
224 gate
? &sin_gate
: NULL
, smplsp
,
225 ifindex
, bh_type
, metric
);
227 if (IS_ZEBRA_DEBUG_KERNEL
) {
230 "%s: %s: attention! gate not found for re",
231 __func__
, prefix_buf
);
236 &sin_gate
.sin
.sin_addr
,
237 gate_buf
, sizeof(gate_buf
));
242 &sin_gate
.sin6
.sin6_addr
,
243 gate_buf
, sizeof(gate_buf
));
247 snprintf(gate_buf
, sizeof(gate_buf
),
254 /* We only flag nexthops as being in FIB if
255 * rtm_write() did its work. */
256 case ZEBRA_ERR_NOERROR
:
258 if (IS_ZEBRA_DEBUG_KERNEL
)
259 zlog_debug("%s: %s: successfully did NH %s",
260 __func__
, prefix_buf
, gate_buf
);
262 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
265 /* The only valid case for this error is
266 * kernel's failure to install a multipath
267 * route, which is common for FreeBSD. This
268 * should be ignored silently, but logged as an error
271 case ZEBRA_ERR_RTEXIST
:
273 flog_err(EC_LIB_SYSTEM_CALL
,
274 "%s: rtm_write() returned %d for command %d",
275 __func__
, error
, cmd
);
278 /* Note any unexpected status returns */
282 "%s: %s: rtm_write() unexpectedly returned %d for command %s",
283 __func__
, prefix_buf
, error
,
284 lookup_msg(rtm_type_str
, cmd
, NULL
));
287 } /* for (ALL_NEXTHOPS(...))*/
289 /* If there was no useful nexthop, then complain. */
290 if (nexthop_num
== 0) {
291 if (IS_ZEBRA_DEBUG_KERNEL
)
293 "%s: No useful nexthops were found in RIB prefix %s",
294 __func__
, prefix_buf
);
302 * Update or delete a prefix from the kernel,
303 * using info from a dataplane context struct.
305 enum zebra_dplane_result
kernel_route_update(struct zebra_dplane_ctx
*ctx
)
307 enum zebra_dplane_result res
= ZEBRA_DPLANE_REQUEST_SUCCESS
;
308 uint32_t type
, old_type
;
310 if (dplane_ctx_get_src(ctx
) != NULL
) {
311 zlog_err("route add: IPv6 sourcedest routes unsupported!");
312 return ZEBRA_DPLANE_REQUEST_FAILURE
;
315 type
= dplane_ctx_get_type(ctx
);
316 old_type
= dplane_ctx_get_old_type(ctx
);
318 frr_with_privs(&zserv_privs
) {
320 if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_DELETE
) {
321 if (!RSYSTEM_ROUTE(type
))
322 kernel_rtm(RTM_DELETE
, dplane_ctx_get_dest(ctx
),
323 dplane_ctx_get_ng(ctx
),
324 dplane_ctx_get_metric(ctx
));
325 } else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_INSTALL
) {
326 if (!RSYSTEM_ROUTE(type
))
327 kernel_rtm(RTM_ADD
, dplane_ctx_get_dest(ctx
),
328 dplane_ctx_get_ng(ctx
),
329 dplane_ctx_get_metric(ctx
));
330 } else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_UPDATE
) {
331 /* Must do delete and add separately -
332 * no update available
334 if (!RSYSTEM_ROUTE(old_type
))
335 kernel_rtm(RTM_DELETE
, dplane_ctx_get_dest(ctx
),
336 dplane_ctx_get_old_ng(ctx
),
337 dplane_ctx_get_old_metric(ctx
));
339 if (!RSYSTEM_ROUTE(type
))
340 kernel_rtm(RTM_ADD
, dplane_ctx_get_dest(ctx
),
341 dplane_ctx_get_ng(ctx
),
342 dplane_ctx_get_metric(ctx
));
344 zlog_err("Invalid routing socket update op %s (%u)",
345 dplane_op2str(dplane_ctx_get_op(ctx
)),
346 dplane_ctx_get_op(ctx
));
347 res
= ZEBRA_DPLANE_REQUEST_FAILURE
;
349 } /* Elevated privs */
351 if (RSYSTEM_ROUTE(type
)
352 && dplane_ctx_get_op(ctx
) != DPLANE_OP_ROUTE_DELETE
) {
353 struct nexthop
*nexthop
;
355 for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx
), nexthop
)) {
356 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
))
359 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
)) {
360 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
368 enum zebra_dplane_result
kernel_nexthop_update(struct zebra_dplane_ctx
*ctx
)
370 return ZEBRA_DPLANE_REQUEST_SUCCESS
;
373 int kernel_neigh_update(int add
, int ifindex
, uint32_t addr
, char *lla
,
374 int llalen
, ns_id_t ns_id
)
380 /* NYI on routing-socket platforms, but we've always returned 'success'... */
381 enum zebra_dplane_result
kernel_neigh_update_ctx(struct zebra_dplane_ctx
*ctx
)
383 return ZEBRA_DPLANE_REQUEST_SUCCESS
;
386 extern int kernel_get_ipmr_sg_stats(struct zebra_vrf
*zvrf
, void *mroute
)
392 * Update MAC, using dataplane context object. No-op here for now.
394 enum zebra_dplane_result
kernel_mac_update_ctx(struct zebra_dplane_ctx
*ctx
)
396 return ZEBRA_DPLANE_REQUEST_SUCCESS
;
399 extern int kernel_interface_set_master(struct interface
*master
,
400 struct interface
*slave
)
405 uint32_t kernel_get_speed(struct interface
*ifp
, int *error
)
410 #endif /* !HAVE_NETLINK */