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 if (IS_ZEBRA_DEBUG_RIB
|| IS_ZEBRA_DEBUG_KERNEL
)
88 prefix2str(p
, prefix_buf
, sizeof(prefix_buf
));
91 * We only have the ability to ADD or DELETE at this point
94 if (cmd
!= RTM_ADD
&& cmd
!= RTM_DELETE
) {
95 if (IS_ZEBRA_DEBUG_KERNEL
)
96 zlog_debug("%s: %s odd command %s for flags %d",
98 lookup_msg(rtm_type_str
, cmd
, NULL
),
103 memset(&sin_dest
, 0, sizeof(sin_dest
));
104 memset(&sin_gate
, 0, sizeof(sin_gate
));
105 memset(&sin_mask
, 0, sizeof(sin_mask
));
109 sin_dest
.sin
.sin_family
= AF_INET
;
110 sin_dest
.sin
.sin_addr
= p
->u
.prefix4
;
111 sin_gate
.sin
.sin_family
= AF_INET
;
112 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
113 sin_dest
.sin
.sin_len
= sizeof(struct sockaddr_in
);
114 sin_gate
.sin
.sin_len
= sizeof(struct sockaddr_in
);
115 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
118 sin_dest
.sin6
.sin6_family
= AF_INET6
;
119 sin_dest
.sin6
.sin6_addr
= p
->u
.prefix6
;
120 sin_gate
.sin6
.sin6_family
= AF_INET6
;
121 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
122 sin_dest
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
123 sin_gate
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
124 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
129 for (ALL_NEXTHOPS_PTR(ng
, nexthop
)) {
131 * We only want to use the actual good nexthops
133 if (CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_RECURSIVE
) ||
134 !CHECK_FLAG(nexthop
->flags
, NEXTHOP_FLAG_ACTIVE
))
139 snprintf(gate_buf
, sizeof(gate_buf
), "NULL");
141 switch (nexthop
->type
) {
142 case NEXTHOP_TYPE_IPV4
:
143 case NEXTHOP_TYPE_IPV4_IFINDEX
:
144 sin_gate
.sin
.sin_addr
= nexthop
->gate
.ipv4
;
145 sin_gate
.sin
.sin_family
= AF_INET
;
146 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
147 sin_gate
.sin
.sin_len
= sizeof(struct sockaddr_in
);
148 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
149 ifindex
= nexthop
->ifindex
;
152 case NEXTHOP_TYPE_IPV6
:
153 case NEXTHOP_TYPE_IPV6_IFINDEX
:
154 sin_gate
.sin6
.sin6_addr
= nexthop
->gate
.ipv6
;
155 sin_gate
.sin6
.sin6_family
= AF_INET6
;
156 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
157 sin_gate
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
158 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
159 ifindex
= nexthop
->ifindex
;
160 /* Under kame set interface index to link local address */
163 #define SET_IN6_LINKLOCAL_IFINDEX(a, i) \
165 (a).s6_addr[2] = ((i) >> 8) & 0xff; \
166 (a).s6_addr[3] = (i)&0xff; \
169 if (IN6_IS_ADDR_LINKLOCAL(&sin_gate
.sin6
.sin6_addr
))
170 SET_IN6_LINKLOCAL_IFINDEX(
171 sin_gate
.sin6
.sin6_addr
,
177 case NEXTHOP_TYPE_IFINDEX
:
178 ifindex
= nexthop
->ifindex
;
180 case NEXTHOP_TYPE_BLACKHOLE
:
181 bh_type
= nexthop
->bh_type
;
184 struct in_addr loopback
;
185 loopback
.s_addr
= htonl(INADDR_LOOPBACK
);
186 sin_gate
.sin
.sin_addr
= loopback
;
187 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
188 sin_gate
.sin
.sin_len
=
189 sizeof(struct sockaddr_in
);
190 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
201 masklen2ip(p
->prefixlen
, &sin_mask
.sin
.sin_addr
);
202 sin_mask
.sin
.sin_family
= AF_INET
;
203 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
204 sin_mask
.sin
.sin_len
= sizeof(struct sockaddr_in
);
205 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
208 masklen2ip6(p
->prefixlen
, &sin_mask
.sin6
.sin6_addr
);
209 sin_mask
.sin6
.sin6_family
= AF_INET6
;
210 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
211 sin_mask
.sin6
.sin6_len
= sizeof(struct sockaddr_in6
);
212 #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
217 if (nexthop
->nh_label
218 && !kernel_rtm_add_labels(nexthop
->nh_label
, &smpls
))
220 smplsp
= (union sockunion
*)&smpls
;
222 error
= rtm_write(cmd
, &sin_dest
, &sin_mask
,
223 gate
? &sin_gate
: NULL
, smplsp
,
224 ifindex
, bh_type
, metric
);
226 if (IS_ZEBRA_DEBUG_KERNEL
) {
229 "%s: %s: attention! gate not found for re",
230 __func__
, prefix_buf
);
235 &sin_gate
.sin
.sin_addr
,
236 gate_buf
, sizeof(gate_buf
));
241 &sin_gate
.sin6
.sin6_addr
,
242 gate_buf
, sizeof(gate_buf
));
246 snprintf(gate_buf
, sizeof(gate_buf
),
253 /* We only flag nexthops as being in FIB if
254 * rtm_write() did its work. */
255 case ZEBRA_ERR_NOERROR
:
257 if (IS_ZEBRA_DEBUG_KERNEL
)
258 zlog_debug("%s: %s: successfully did NH %s",
259 __func__
, prefix_buf
, gate_buf
);
261 SET_FLAG(nexthop
->flags
, NEXTHOP_FLAG_FIB
);
264 /* The only valid case for this error is
265 * kernel's failure to install a multipath
266 * route, which is common for FreeBSD. This
267 * should be ignored silently, but logged as an error
270 case ZEBRA_ERR_RTEXIST
:
272 flog_err(EC_LIB_SYSTEM_CALL
,
273 "%s: rtm_write() returned %d for command %d",
274 __func__
, error
, cmd
);
277 /* Note any unexpected status returns */
281 "%s: %s: rtm_write() unexpectedly returned %d for command %s",
282 __func__
, prefix_buf
, error
,
283 lookup_msg(rtm_type_str
, cmd
, NULL
));
286 } /* for (ALL_NEXTHOPS(...))*/
288 /* If there was no useful nexthop, then complain. */
289 if (nexthop_num
== 0) {
290 if (IS_ZEBRA_DEBUG_KERNEL
)
292 "%s: No useful nexthops were found in RIB prefix %s",
293 __func__
, prefix_buf
);
301 * Update or delete a prefix from the kernel,
302 * using info from a dataplane context struct.
304 enum zebra_dplane_result
kernel_route_update(struct zebra_dplane_ctx
*ctx
)
306 enum zebra_dplane_result res
= ZEBRA_DPLANE_REQUEST_SUCCESS
;
308 if (dplane_ctx_get_src(ctx
) != NULL
) {
309 zlog_err("route add: IPv6 sourcedest routes unsupported!");
310 res
= ZEBRA_DPLANE_REQUEST_FAILURE
;
314 frr_elevate_privs(&zserv_privs
) {
316 if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_DELETE
)
317 kernel_rtm(RTM_DELETE
, dplane_ctx_get_dest(ctx
),
318 dplane_ctx_get_ng(ctx
),
319 dplane_ctx_get_metric(ctx
));
320 else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_INSTALL
)
321 kernel_rtm(RTM_ADD
, dplane_ctx_get_dest(ctx
),
322 dplane_ctx_get_ng(ctx
),
323 dplane_ctx_get_metric(ctx
));
324 else if (dplane_ctx_get_op(ctx
) == DPLANE_OP_ROUTE_UPDATE
) {
325 /* Must do delete and add separately -
326 * no update available
328 kernel_rtm(RTM_DELETE
, dplane_ctx_get_dest(ctx
),
329 dplane_ctx_get_old_ng(ctx
),
330 dplane_ctx_get_old_metric(ctx
));
332 kernel_rtm(RTM_ADD
, dplane_ctx_get_dest(ctx
),
333 dplane_ctx_get_ng(ctx
),
334 dplane_ctx_get_metric(ctx
));
336 zlog_err("Invalid routing socket update op %s (%u)",
337 dplane_op2str(dplane_ctx_get_op(ctx
)),
338 dplane_ctx_get_op(ctx
));
339 res
= ZEBRA_DPLANE_REQUEST_FAILURE
;
341 } /* Elevated privs */
348 int kernel_neigh_update(int add
, int ifindex
, uint32_t addr
, char *lla
,
349 int llalen
, ns_id_t ns_id
)
355 extern int kernel_get_ipmr_sg_stats(struct zebra_vrf
*zvrf
, void *mroute
)
360 int kernel_add_vtep(vni_t vni
, struct interface
*ifp
, struct in_addr
*vtep_ip
)
365 int kernel_del_vtep(vni_t vni
, struct interface
*ifp
, struct in_addr
*vtep_ip
)
370 int kernel_add_mac(struct interface
*ifp
, vlanid_t vid
, struct ethaddr
*mac
,
371 struct in_addr vtep_ip
, bool sticky
)
376 int kernel_del_mac(struct interface
*ifp
, vlanid_t vid
, struct ethaddr
*mac
,
377 struct in_addr vtep_ip
)
382 int kernel_add_neigh(struct interface
*ifp
, struct ipaddr
*ip
,
383 struct ethaddr
*mac
, uint8_t flags
)
388 int kernel_del_neigh(struct interface
*ifp
, struct ipaddr
*ip
)
393 extern int kernel_interface_set_master(struct interface
*master
,
394 struct interface
*slave
)
399 uint32_t kernel_get_speed(struct interface
*ifp
)
404 #endif /* !HAVE_NETLINK */