if_bridge.c revision 1.72 1 1.72 pooka /* $NetBSD: if_bridge.c,v 1.72 2010/12/07 20:38:26 pooka Exp $ */
2 1.1 thorpej
3 1.1 thorpej /*
4 1.1 thorpej * Copyright 2001 Wasabi Systems, Inc.
5 1.1 thorpej * All rights reserved.
6 1.1 thorpej *
7 1.1 thorpej * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 1.1 thorpej *
9 1.1 thorpej * Redistribution and use in source and binary forms, with or without
10 1.1 thorpej * modification, are permitted provided that the following conditions
11 1.1 thorpej * are met:
12 1.1 thorpej * 1. Redistributions of source code must retain the above copyright
13 1.1 thorpej * notice, this list of conditions and the following disclaimer.
14 1.1 thorpej * 2. Redistributions in binary form must reproduce the above copyright
15 1.1 thorpej * notice, this list of conditions and the following disclaimer in the
16 1.1 thorpej * documentation and/or other materials provided with the distribution.
17 1.1 thorpej * 3. All advertising materials mentioning features or use of this software
18 1.1 thorpej * must display the following acknowledgement:
19 1.1 thorpej * This product includes software developed for the NetBSD Project by
20 1.1 thorpej * Wasabi Systems, Inc.
21 1.1 thorpej * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 1.1 thorpej * or promote products derived from this software without specific prior
23 1.1 thorpej * written permission.
24 1.1 thorpej *
25 1.1 thorpej * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 1.1 thorpej * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 1.1 thorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 1.1 thorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 1.1 thorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 1.1 thorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 1.1 thorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 1.1 thorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 1.1 thorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 1.1 thorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 1.1 thorpej * POSSIBILITY OF SUCH DAMAGE.
36 1.1 thorpej */
37 1.1 thorpej
38 1.29 perry /*
39 1.1 thorpej * Copyright (c) 1999, 2000 Jason L. Wright (jason (at) thought.net)
40 1.29 perry * All rights reserved.
41 1.1 thorpej *
42 1.29 perry * Redistribution and use in source and binary forms, with or without
43 1.29 perry * modification, are permitted provided that the following conditions
44 1.1 thorpej * are met:
45 1.1 thorpej * 1. Redistributions of source code must retain the above copyright
46 1.1 thorpej * notice, this list of conditions and the following disclaimer.
47 1.1 thorpej * 2. Redistributions in binary form must reproduce the above copyright
48 1.1 thorpej * notice, this list of conditions and the following disclaimer in the
49 1.1 thorpej * documentation and/or other materials provided with the distribution.
50 1.1 thorpej * 3. All advertising materials mentioning features or use of this software
51 1.1 thorpej * must display the following acknowledgement:
52 1.1 thorpej * This product includes software developed by Jason L. Wright
53 1.1 thorpej * 4. The name of the author may not be used to endorse or promote products
54 1.1 thorpej * derived from this software without specific prior written permission.
55 1.1 thorpej *
56 1.1 thorpej * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
57 1.1 thorpej * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
58 1.1 thorpej * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
59 1.1 thorpej * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
60 1.1 thorpej * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
61 1.1 thorpej * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
62 1.1 thorpej * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
63 1.1 thorpej * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
64 1.1 thorpej * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
65 1.1 thorpej * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
66 1.1 thorpej * POSSIBILITY OF SUCH DAMAGE.
67 1.1 thorpej *
68 1.1 thorpej * OpenBSD: if_bridge.c,v 1.60 2001/06/15 03:38:33 itojun Exp
69 1.1 thorpej */
70 1.1 thorpej
71 1.1 thorpej /*
72 1.1 thorpej * Network interface bridge support.
73 1.1 thorpej *
74 1.1 thorpej * TODO:
75 1.1 thorpej *
76 1.1 thorpej * - Currently only supports Ethernet-like interfaces (Ethernet,
77 1.1 thorpej * 802.11, VLANs on Ethernet, etc.) Figure out a nice way
78 1.1 thorpej * to bridge other types of interfaces (FDDI-FDDI, and maybe
79 1.1 thorpej * consider heterogenous bridges).
80 1.1 thorpej */
81 1.3 lukem
82 1.3 lukem #include <sys/cdefs.h>
83 1.72 pooka __KERNEL_RCSID(0, "$NetBSD: if_bridge.c,v 1.72 2010/12/07 20:38:26 pooka Exp $");
84 1.1 thorpej
85 1.72 pooka #ifdef _KERNEL_OPT
86 1.10 perseant #include "opt_bridge_ipf.h"
87 1.16 jdc #include "opt_inet.h"
88 1.15 martin #include "opt_pfil_hooks.h"
89 1.72 pooka #endif /* _KERNEL_OPT */
90 1.1 thorpej
91 1.29 perry #include <sys/param.h>
92 1.1 thorpej #include <sys/kernel.h>
93 1.1 thorpej #include <sys/mbuf.h>
94 1.1 thorpej #include <sys/queue.h>
95 1.1 thorpej #include <sys/socket.h>
96 1.68 bouyer #include <sys/socketvar.h> /* for softnet_lock */
97 1.1 thorpej #include <sys/sockio.h>
98 1.1 thorpej #include <sys/systm.h>
99 1.29 perry #include <sys/proc.h>
100 1.1 thorpej #include <sys/pool.h>
101 1.37 elad #include <sys/kauth.h>
102 1.65 bouyer #include <sys/cpu.h>
103 1.1 thorpej
104 1.1 thorpej #include <net/bpf.h>
105 1.1 thorpej #include <net/if.h>
106 1.1 thorpej #include <net/if_dl.h>
107 1.1 thorpej #include <net/if_types.h>
108 1.1 thorpej #include <net/if_llc.h>
109 1.1 thorpej
110 1.1 thorpej #include <net/if_ether.h>
111 1.1 thorpej #include <net/if_bridgevar.h>
112 1.1 thorpej
113 1.25 christos #if defined(BRIDGE_IPF) && defined(PFIL_HOOKS)
114 1.25 christos /* Used for bridge_ip[6]_checkbasic */
115 1.9 perseant #include <netinet/in.h>
116 1.9 perseant #include <netinet/in_systm.h>
117 1.9 perseant #include <netinet/ip.h>
118 1.9 perseant #include <netinet/ip_var.h>
119 1.61 thorpej #include <netinet/ip_private.h> /* XXX */
120 1.9 perseant
121 1.9 perseant #include <netinet/ip6.h>
122 1.9 perseant #include <netinet6/in6_var.h>
123 1.9 perseant #include <netinet6/ip6_var.h>
124 1.61 thorpej #include <netinet6/ip6_private.h> /* XXX */
125 1.25 christos #endif /* BRIDGE_IPF && PFIL_HOOKS */
126 1.9 perseant
127 1.1 thorpej /*
128 1.1 thorpej * Size of the route hash table. Must be a power of two.
129 1.1 thorpej */
130 1.1 thorpej #ifndef BRIDGE_RTHASH_SIZE
131 1.1 thorpej #define BRIDGE_RTHASH_SIZE 1024
132 1.1 thorpej #endif
133 1.1 thorpej
134 1.1 thorpej #define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
135 1.1 thorpej
136 1.38 liamjfoy #include "carp.h"
137 1.38 liamjfoy #if NCARP > 0
138 1.38 liamjfoy #include <netinet/in.h>
139 1.38 liamjfoy #include <netinet/in_var.h>
140 1.38 liamjfoy #include <netinet/ip_carp.h>
141 1.38 liamjfoy #endif
142 1.38 liamjfoy
143 1.1 thorpej /*
144 1.1 thorpej * Maximum number of addresses to cache.
145 1.1 thorpej */
146 1.1 thorpej #ifndef BRIDGE_RTABLE_MAX
147 1.1 thorpej #define BRIDGE_RTABLE_MAX 100
148 1.1 thorpej #endif
149 1.1 thorpej
150 1.1 thorpej /*
151 1.1 thorpej * Spanning tree defaults.
152 1.1 thorpej */
153 1.1 thorpej #define BSTP_DEFAULT_MAX_AGE (20 * 256)
154 1.1 thorpej #define BSTP_DEFAULT_HELLO_TIME (2 * 256)
155 1.1 thorpej #define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
156 1.1 thorpej #define BSTP_DEFAULT_HOLD_TIME (1 * 256)
157 1.1 thorpej #define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
158 1.1 thorpej #define BSTP_DEFAULT_PORT_PRIORITY 0x80
159 1.1 thorpej #define BSTP_DEFAULT_PATH_COST 55
160 1.1 thorpej
161 1.1 thorpej /*
162 1.1 thorpej * Timeout (in seconds) for entries learned dynamically.
163 1.1 thorpej */
164 1.1 thorpej #ifndef BRIDGE_RTABLE_TIMEOUT
165 1.1 thorpej #define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
166 1.1 thorpej #endif
167 1.1 thorpej
168 1.1 thorpej /*
169 1.1 thorpej * Number of seconds between walks of the route list.
170 1.1 thorpej */
171 1.1 thorpej #ifndef BRIDGE_RTABLE_PRUNE_PERIOD
172 1.1 thorpej #define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
173 1.1 thorpej #endif
174 1.1 thorpej
175 1.1 thorpej int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
176 1.1 thorpej
177 1.33 thorpej static struct pool bridge_rtnode_pool;
178 1.1 thorpej
179 1.1 thorpej void bridgeattach(int);
180 1.1 thorpej
181 1.33 thorpej static int bridge_clone_create(struct if_clone *, int);
182 1.33 thorpej static int bridge_clone_destroy(struct ifnet *);
183 1.1 thorpej
184 1.50 christos static int bridge_ioctl(struct ifnet *, u_long, void *);
185 1.33 thorpej static int bridge_init(struct ifnet *);
186 1.33 thorpej static void bridge_stop(struct ifnet *, int);
187 1.33 thorpej static void bridge_start(struct ifnet *);
188 1.33 thorpej
189 1.65 bouyer static void bridge_forward(void *);
190 1.33 thorpej
191 1.33 thorpej static void bridge_timer(void *);
192 1.33 thorpej
193 1.33 thorpej static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
194 1.33 thorpej struct mbuf *);
195 1.33 thorpej
196 1.33 thorpej static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
197 1.33 thorpej struct ifnet *, int, uint8_t);
198 1.33 thorpej static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
199 1.33 thorpej static void bridge_rttrim(struct bridge_softc *);
200 1.33 thorpej static void bridge_rtage(struct bridge_softc *);
201 1.33 thorpej static void bridge_rtflush(struct bridge_softc *, int);
202 1.33 thorpej static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
203 1.33 thorpej static void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp);
204 1.33 thorpej
205 1.33 thorpej static int bridge_rtable_init(struct bridge_softc *);
206 1.33 thorpej static void bridge_rtable_fini(struct bridge_softc *);
207 1.33 thorpej
208 1.33 thorpej static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
209 1.33 thorpej const uint8_t *);
210 1.33 thorpej static int bridge_rtnode_insert(struct bridge_softc *,
211 1.33 thorpej struct bridge_rtnode *);
212 1.33 thorpej static void bridge_rtnode_destroy(struct bridge_softc *,
213 1.33 thorpej struct bridge_rtnode *);
214 1.33 thorpej
215 1.33 thorpej static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
216 1.33 thorpej const char *name);
217 1.33 thorpej static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
218 1.33 thorpej struct ifnet *ifp);
219 1.33 thorpej static void bridge_delete_member(struct bridge_softc *,
220 1.33 thorpej struct bridge_iflist *);
221 1.33 thorpej
222 1.33 thorpej static int bridge_ioctl_add(struct bridge_softc *, void *);
223 1.33 thorpej static int bridge_ioctl_del(struct bridge_softc *, void *);
224 1.33 thorpej static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
225 1.33 thorpej static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
226 1.33 thorpej static int bridge_ioctl_scache(struct bridge_softc *, void *);
227 1.33 thorpej static int bridge_ioctl_gcache(struct bridge_softc *, void *);
228 1.33 thorpej static int bridge_ioctl_gifs(struct bridge_softc *, void *);
229 1.33 thorpej static int bridge_ioctl_rts(struct bridge_softc *, void *);
230 1.33 thorpej static int bridge_ioctl_saddr(struct bridge_softc *, void *);
231 1.33 thorpej static int bridge_ioctl_sto(struct bridge_softc *, void *);
232 1.33 thorpej static int bridge_ioctl_gto(struct bridge_softc *, void *);
233 1.33 thorpej static int bridge_ioctl_daddr(struct bridge_softc *, void *);
234 1.33 thorpej static int bridge_ioctl_flush(struct bridge_softc *, void *);
235 1.33 thorpej static int bridge_ioctl_gpri(struct bridge_softc *, void *);
236 1.33 thorpej static int bridge_ioctl_spri(struct bridge_softc *, void *);
237 1.33 thorpej static int bridge_ioctl_ght(struct bridge_softc *, void *);
238 1.33 thorpej static int bridge_ioctl_sht(struct bridge_softc *, void *);
239 1.33 thorpej static int bridge_ioctl_gfd(struct bridge_softc *, void *);
240 1.33 thorpej static int bridge_ioctl_sfd(struct bridge_softc *, void *);
241 1.33 thorpej static int bridge_ioctl_gma(struct bridge_softc *, void *);
242 1.33 thorpej static int bridge_ioctl_sma(struct bridge_softc *, void *);
243 1.33 thorpej static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
244 1.33 thorpej static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
245 1.25 christos #if defined(BRIDGE_IPF) && defined(PFIL_HOOKS)
246 1.33 thorpej static int bridge_ioctl_gfilt(struct bridge_softc *, void *);
247 1.33 thorpej static int bridge_ioctl_sfilt(struct bridge_softc *, void *);
248 1.33 thorpej static int bridge_ipf(void *, struct mbuf **, struct ifnet *, int);
249 1.33 thorpej static int bridge_ip_checkbasic(struct mbuf **mp);
250 1.9 perseant # ifdef INET6
251 1.33 thorpej static int bridge_ip6_checkbasic(struct mbuf **mp);
252 1.9 perseant # endif /* INET6 */
253 1.25 christos #endif /* BRIDGE_IPF && PFIL_HOOKS */
254 1.1 thorpej
255 1.1 thorpej struct bridge_control {
256 1.1 thorpej int (*bc_func)(struct bridge_softc *, void *);
257 1.1 thorpej int bc_argsize;
258 1.1 thorpej int bc_flags;
259 1.1 thorpej };
260 1.1 thorpej
261 1.1 thorpej #define BC_F_COPYIN 0x01 /* copy arguments in */
262 1.1 thorpej #define BC_F_COPYOUT 0x02 /* copy arguments out */
263 1.1 thorpej #define BC_F_SUSER 0x04 /* do super-user check */
264 1.1 thorpej
265 1.33 thorpej static const struct bridge_control bridge_control_table[] = {
266 1.55 dyoung [BRDGADD] = {bridge_ioctl_add, sizeof(struct ifbreq), BC_F_COPYIN|BC_F_SUSER},
267 1.55 dyoung [BRDGDEL] = {bridge_ioctl_del, sizeof(struct ifbreq), BC_F_COPYIN|BC_F_SUSER},
268 1.1 thorpej
269 1.55 dyoung [BRDGGIFFLGS] = {bridge_ioctl_gifflags, sizeof(struct ifbreq), BC_F_COPYIN|BC_F_COPYOUT},
270 1.55 dyoung [BRDGSIFFLGS] = {bridge_ioctl_sifflags, sizeof(struct ifbreq), BC_F_COPYIN|BC_F_SUSER},
271 1.11 bouyer
272 1.55 dyoung [BRDGSCACHE] = {bridge_ioctl_scache, sizeof(struct ifbrparam), BC_F_COPYIN|BC_F_SUSER},
273 1.55 dyoung [BRDGGCACHE] = {bridge_ioctl_gcache, sizeof(struct ifbrparam), BC_F_COPYOUT},
274 1.55 dyoung
275 1.55 dyoung [BRDGGIFS] = {bridge_ioctl_gifs, sizeof(struct ifbifconf), BC_F_COPYIN|BC_F_COPYOUT},
276 1.55 dyoung [BRDGRTS] = {bridge_ioctl_rts, sizeof(struct ifbaconf), BC_F_COPYIN|BC_F_COPYOUT},
277 1.55 dyoung
278 1.55 dyoung [BRDGSADDR] = {bridge_ioctl_saddr, sizeof(struct ifbareq), BC_F_COPYIN|BC_F_SUSER},
279 1.55 dyoung
280 1.55 dyoung [BRDGSTO] = {bridge_ioctl_sto, sizeof(struct ifbrparam), BC_F_COPYIN|BC_F_SUSER},
281 1.55 dyoung [BRDGGTO] = {bridge_ioctl_gto, sizeof(struct ifbrparam), BC_F_COPYOUT},
282 1.55 dyoung
283 1.55 dyoung [BRDGDADDR] = {bridge_ioctl_daddr, sizeof(struct ifbareq), BC_F_COPYIN|BC_F_SUSER},
284 1.55 dyoung
285 1.55 dyoung [BRDGFLUSH] = {bridge_ioctl_flush, sizeof(struct ifbreq), BC_F_COPYIN|BC_F_SUSER},
286 1.55 dyoung
287 1.55 dyoung [BRDGGPRI] = {bridge_ioctl_gpri, sizeof(struct ifbrparam), BC_F_COPYOUT},
288 1.55 dyoung [BRDGSPRI] = {bridge_ioctl_spri, sizeof(struct ifbrparam), BC_F_COPYIN|BC_F_SUSER},
289 1.55 dyoung
290 1.55 dyoung [BRDGGHT] = {bridge_ioctl_ght, sizeof(struct ifbrparam), BC_F_COPYOUT},
291 1.55 dyoung [BRDGSHT] = {bridge_ioctl_sht, sizeof(struct ifbrparam), BC_F_COPYIN|BC_F_SUSER},
292 1.55 dyoung
293 1.55 dyoung [BRDGGFD] = {bridge_ioctl_gfd, sizeof(struct ifbrparam), BC_F_COPYOUT},
294 1.55 dyoung [BRDGSFD] = {bridge_ioctl_sfd, sizeof(struct ifbrparam), BC_F_COPYIN|BC_F_SUSER},
295 1.55 dyoung
296 1.55 dyoung [BRDGGMA] = {bridge_ioctl_gma, sizeof(struct ifbrparam), BC_F_COPYOUT},
297 1.55 dyoung [BRDGSMA] = {bridge_ioctl_sma, sizeof(struct ifbrparam), BC_F_COPYIN|BC_F_SUSER},
298 1.55 dyoung
299 1.55 dyoung [BRDGSIFPRIO] = {bridge_ioctl_sifprio, sizeof(struct ifbreq), BC_F_COPYIN|BC_F_SUSER},
300 1.55 dyoung
301 1.55 dyoung [BRDGSIFCOST] = {bridge_ioctl_sifcost, sizeof(struct ifbreq), BC_F_COPYIN|BC_F_SUSER},
302 1.25 christos #if defined(BRIDGE_IPF) && defined(PFIL_HOOKS)
303 1.55 dyoung [BRDGGFILT] = {bridge_ioctl_gfilt, sizeof(struct ifbrparam), BC_F_COPYOUT},
304 1.55 dyoung [BRDGSFILT] = {bridge_ioctl_sfilt, sizeof(struct ifbrparam), BC_F_COPYIN|BC_F_SUSER},
305 1.25 christos #endif /* BRIDGE_IPF && PFIL_HOOKS */
306 1.1 thorpej };
307 1.49 dyoung static const int bridge_control_table_size = __arraycount(bridge_control_table);
308 1.1 thorpej
309 1.33 thorpej static LIST_HEAD(, bridge_softc) bridge_list;
310 1.1 thorpej
311 1.33 thorpej static struct if_clone bridge_cloner =
312 1.1 thorpej IF_CLONE_INITIALIZER("bridge", bridge_clone_create, bridge_clone_destroy);
313 1.1 thorpej
314 1.1 thorpej /*
315 1.1 thorpej * bridgeattach:
316 1.1 thorpej *
317 1.1 thorpej * Pseudo-device attach routine.
318 1.1 thorpej */
319 1.1 thorpej void
320 1.45 christos bridgeattach(int n)
321 1.1 thorpej {
322 1.1 thorpej
323 1.1 thorpej pool_init(&bridge_rtnode_pool, sizeof(struct bridge_rtnode),
324 1.51 ad 0, 0, 0, "brtpl", NULL, IPL_NET);
325 1.1 thorpej
326 1.1 thorpej LIST_INIT(&bridge_list);
327 1.1 thorpej if_clone_attach(&bridge_cloner);
328 1.1 thorpej }
329 1.1 thorpej
330 1.1 thorpej /*
331 1.1 thorpej * bridge_clone_create:
332 1.1 thorpej *
333 1.1 thorpej * Create a new bridge instance.
334 1.1 thorpej */
335 1.33 thorpej static int
336 1.1 thorpej bridge_clone_create(struct if_clone *ifc, int unit)
337 1.1 thorpej {
338 1.1 thorpej struct bridge_softc *sc;
339 1.1 thorpej struct ifnet *ifp;
340 1.1 thorpej int s;
341 1.1 thorpej
342 1.62 christos sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
343 1.1 thorpej ifp = &sc->sc_if;
344 1.1 thorpej
345 1.1 thorpej sc->sc_brtmax = BRIDGE_RTABLE_MAX;
346 1.1 thorpej sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
347 1.29 perry sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
348 1.1 thorpej sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
349 1.1 thorpej sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
350 1.1 thorpej sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
351 1.1 thorpej sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
352 1.9 perseant sc->sc_filter_flags = 0;
353 1.1 thorpej
354 1.65 bouyer /* software interrupt to do the work */
355 1.65 bouyer sc->sc_softintr = softint_establish(SOFTINT_NET, bridge_forward, sc);
356 1.65 bouyer if (sc->sc_softintr == NULL) {
357 1.65 bouyer free(sc, M_DEVBUF);
358 1.65 bouyer return ENOMEM;
359 1.65 bouyer }
360 1.65 bouyer
361 1.1 thorpej /* Initialize our routing table. */
362 1.1 thorpej bridge_rtable_init(sc);
363 1.1 thorpej
364 1.52 ad callout_init(&sc->sc_brcallout, 0);
365 1.52 ad callout_init(&sc->sc_bstpcallout, 0);
366 1.1 thorpej
367 1.1 thorpej LIST_INIT(&sc->sc_iflist);
368 1.1 thorpej
369 1.62 christos if_initname(ifp, ifc->ifc_name, unit);
370 1.1 thorpej ifp->if_softc = sc;
371 1.1 thorpej ifp->if_mtu = ETHERMTU;
372 1.1 thorpej ifp->if_ioctl = bridge_ioctl;
373 1.1 thorpej ifp->if_output = bridge_output;
374 1.1 thorpej ifp->if_start = bridge_start;
375 1.1 thorpej ifp->if_stop = bridge_stop;
376 1.1 thorpej ifp->if_init = bridge_init;
377 1.6 itojun ifp->if_type = IFT_BRIDGE;
378 1.1 thorpej ifp->if_addrlen = 0;
379 1.1 thorpej ifp->if_dlt = DLT_EN10MB;
380 1.1 thorpej ifp->if_hdrlen = ETHER_HDR_LEN;
381 1.65 bouyer IFQ_SET_READY(&ifp->if_snd);
382 1.1 thorpej
383 1.1 thorpej if_attach(ifp);
384 1.1 thorpej
385 1.1 thorpej if_alloc_sadl(ifp);
386 1.1 thorpej
387 1.1 thorpej s = splnet();
388 1.1 thorpej LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
389 1.1 thorpej splx(s);
390 1.1 thorpej
391 1.1 thorpej return (0);
392 1.1 thorpej }
393 1.1 thorpej
394 1.1 thorpej /*
395 1.1 thorpej * bridge_clone_destroy:
396 1.1 thorpej *
397 1.1 thorpej * Destroy a bridge instance.
398 1.1 thorpej */
399 1.33 thorpej static int
400 1.1 thorpej bridge_clone_destroy(struct ifnet *ifp)
401 1.1 thorpej {
402 1.1 thorpej struct bridge_softc *sc = ifp->if_softc;
403 1.1 thorpej struct bridge_iflist *bif;
404 1.1 thorpej int s;
405 1.1 thorpej
406 1.1 thorpej s = splnet();
407 1.1 thorpej
408 1.1 thorpej bridge_stop(ifp, 1);
409 1.1 thorpej
410 1.1 thorpej while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
411 1.1 thorpej bridge_delete_member(sc, bif);
412 1.1 thorpej
413 1.1 thorpej LIST_REMOVE(sc, sc_list);
414 1.1 thorpej
415 1.1 thorpej splx(s);
416 1.1 thorpej
417 1.1 thorpej if_detach(ifp);
418 1.1 thorpej
419 1.1 thorpej /* Tear down the routing table. */
420 1.1 thorpej bridge_rtable_fini(sc);
421 1.1 thorpej
422 1.65 bouyer softint_disestablish(sc->sc_softintr);
423 1.65 bouyer
424 1.1 thorpej free(sc, M_DEVBUF);
425 1.27 peter
426 1.27 peter return (0);
427 1.1 thorpej }
428 1.1 thorpej
429 1.1 thorpej /*
430 1.1 thorpej * bridge_ioctl:
431 1.1 thorpej *
432 1.1 thorpej * Handle a control request from the operator.
433 1.1 thorpej */
434 1.33 thorpej static int
435 1.50 christos bridge_ioctl(struct ifnet *ifp, u_long cmd, void *data)
436 1.1 thorpej {
437 1.1 thorpej struct bridge_softc *sc = ifp->if_softc;
438 1.40 ad struct lwp *l = curlwp; /* XXX */
439 1.1 thorpej union {
440 1.1 thorpej struct ifbreq ifbreq;
441 1.1 thorpej struct ifbifconf ifbifconf;
442 1.1 thorpej struct ifbareq ifbareq;
443 1.1 thorpej struct ifbaconf ifbaconf;
444 1.1 thorpej struct ifbrparam ifbrparam;
445 1.1 thorpej } args;
446 1.1 thorpej struct ifdrv *ifd = (struct ifdrv *) data;
447 1.69 elad const struct bridge_control *bc = NULL; /* XXXGCC */
448 1.1 thorpej int s, error = 0;
449 1.1 thorpej
450 1.69 elad /* Authorize command before calling splnet(). */
451 1.1 thorpej switch (cmd) {
452 1.1 thorpej case SIOCGDRVSPEC:
453 1.1 thorpej case SIOCSDRVSPEC:
454 1.1 thorpej if (ifd->ifd_cmd >= bridge_control_table_size) {
455 1.1 thorpej error = EINVAL;
456 1.70 cegger return error;
457 1.1 thorpej }
458 1.69 elad
459 1.1 thorpej bc = &bridge_control_table[ifd->ifd_cmd];
460 1.1 thorpej
461 1.69 elad /* We only care about BC_F_SUSER at this point. */
462 1.69 elad if ((bc->bc_flags & BC_F_SUSER) == 0)
463 1.69 elad break;
464 1.69 elad
465 1.69 elad error = kauth_authorize_generic(l->l_cred,
466 1.69 elad KAUTH_GENERIC_ISSUSER, NULL);
467 1.69 elad if (error)
468 1.69 elad return (error);
469 1.69 elad
470 1.69 elad break;
471 1.69 elad }
472 1.69 elad
473 1.69 elad s = splnet();
474 1.69 elad
475 1.69 elad switch (cmd) {
476 1.69 elad case SIOCGDRVSPEC:
477 1.69 elad case SIOCSDRVSPEC:
478 1.70 cegger KASSERT(bc != NULL);
479 1.1 thorpej if (cmd == SIOCGDRVSPEC &&
480 1.14 kristerw (bc->bc_flags & BC_F_COPYOUT) == 0) {
481 1.14 kristerw error = EINVAL;
482 1.14 kristerw break;
483 1.14 kristerw }
484 1.1 thorpej else if (cmd == SIOCSDRVSPEC &&
485 1.14 kristerw (bc->bc_flags & BC_F_COPYOUT) != 0) {
486 1.14 kristerw error = EINVAL;
487 1.14 kristerw break;
488 1.14 kristerw }
489 1.1 thorpej
490 1.69 elad /* BC_F_SUSER is checked above, before splnet(). */
491 1.1 thorpej
492 1.1 thorpej if (ifd->ifd_len != bc->bc_argsize ||
493 1.1 thorpej ifd->ifd_len > sizeof(args)) {
494 1.1 thorpej error = EINVAL;
495 1.1 thorpej break;
496 1.1 thorpej }
497 1.1 thorpej
498 1.35 christos memset(&args, 0, sizeof(args));
499 1.1 thorpej if (bc->bc_flags & BC_F_COPYIN) {
500 1.1 thorpej error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
501 1.1 thorpej if (error)
502 1.1 thorpej break;
503 1.1 thorpej }
504 1.1 thorpej
505 1.1 thorpej error = (*bc->bc_func)(sc, &args);
506 1.1 thorpej if (error)
507 1.1 thorpej break;
508 1.1 thorpej
509 1.1 thorpej if (bc->bc_flags & BC_F_COPYOUT)
510 1.1 thorpej error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
511 1.1 thorpej
512 1.1 thorpej break;
513 1.1 thorpej
514 1.1 thorpej case SIOCSIFFLAGS:
515 1.63 dyoung if ((error = ifioctl_common(ifp, cmd, data)) != 0)
516 1.63 dyoung break;
517 1.63 dyoung switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) {
518 1.63 dyoung case IFF_RUNNING:
519 1.1 thorpej /*
520 1.1 thorpej * If interface is marked down and it is running,
521 1.1 thorpej * then stop and disable it.
522 1.1 thorpej */
523 1.1 thorpej (*ifp->if_stop)(ifp, 1);
524 1.63 dyoung break;
525 1.63 dyoung case IFF_UP:
526 1.1 thorpej /*
527 1.1 thorpej * If interface is marked up and it is stopped, then
528 1.1 thorpej * start it.
529 1.1 thorpej */
530 1.1 thorpej error = (*ifp->if_init)(ifp);
531 1.63 dyoung break;
532 1.63 dyoung default:
533 1.63 dyoung break;
534 1.1 thorpej }
535 1.1 thorpej break;
536 1.1 thorpej
537 1.1 thorpej default:
538 1.63 dyoung error = ifioctl_common(ifp, cmd, data);
539 1.1 thorpej break;
540 1.1 thorpej }
541 1.1 thorpej
542 1.1 thorpej splx(s);
543 1.1 thorpej
544 1.1 thorpej return (error);
545 1.1 thorpej }
546 1.1 thorpej
547 1.1 thorpej /*
548 1.1 thorpej * bridge_lookup_member:
549 1.1 thorpej *
550 1.1 thorpej * Lookup a bridge member interface. Must be called at splnet().
551 1.1 thorpej */
552 1.33 thorpej static struct bridge_iflist *
553 1.1 thorpej bridge_lookup_member(struct bridge_softc *sc, const char *name)
554 1.1 thorpej {
555 1.1 thorpej struct bridge_iflist *bif;
556 1.1 thorpej struct ifnet *ifp;
557 1.1 thorpej
558 1.1 thorpej LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
559 1.1 thorpej ifp = bif->bif_ifp;
560 1.1 thorpej if (strcmp(ifp->if_xname, name) == 0)
561 1.1 thorpej return (bif);
562 1.1 thorpej }
563 1.1 thorpej
564 1.1 thorpej return (NULL);
565 1.1 thorpej }
566 1.1 thorpej
567 1.1 thorpej /*
568 1.8 martin * bridge_lookup_member_if:
569 1.8 martin *
570 1.8 martin * Lookup a bridge member interface by ifnet*. Must be called at splnet().
571 1.8 martin */
572 1.33 thorpej static struct bridge_iflist *
573 1.8 martin bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
574 1.8 martin {
575 1.8 martin struct bridge_iflist *bif;
576 1.8 martin
577 1.8 martin LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
578 1.8 martin if (bif->bif_ifp == member_ifp)
579 1.8 martin return (bif);
580 1.8 martin }
581 1.8 martin
582 1.8 martin return (NULL);
583 1.8 martin }
584 1.8 martin
585 1.8 martin /*
586 1.1 thorpej * bridge_delete_member:
587 1.1 thorpej *
588 1.1 thorpej * Delete the specified member interface.
589 1.1 thorpej */
590 1.33 thorpej static void
591 1.1 thorpej bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif)
592 1.1 thorpej {
593 1.1 thorpej struct ifnet *ifs = bif->bif_ifp;
594 1.1 thorpej
595 1.1 thorpej switch (ifs->if_type) {
596 1.1 thorpej case IFT_ETHER:
597 1.1 thorpej /*
598 1.1 thorpej * Take the interface out of promiscuous mode.
599 1.1 thorpej */
600 1.1 thorpej (void) ifpromisc(ifs, 0);
601 1.1 thorpej break;
602 1.1 thorpej default:
603 1.1 thorpej #ifdef DIAGNOSTIC
604 1.1 thorpej panic("bridge_delete_member: impossible");
605 1.1 thorpej #endif
606 1.1 thorpej break;
607 1.1 thorpej }
608 1.1 thorpej
609 1.1 thorpej ifs->if_bridge = NULL;
610 1.1 thorpej LIST_REMOVE(bif, bif_next);
611 1.1 thorpej
612 1.1 thorpej bridge_rtdelete(sc, ifs);
613 1.1 thorpej
614 1.1 thorpej free(bif, M_DEVBUF);
615 1.1 thorpej
616 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
617 1.1 thorpej bstp_initialization(sc);
618 1.1 thorpej }
619 1.1 thorpej
620 1.33 thorpej static int
621 1.1 thorpej bridge_ioctl_add(struct bridge_softc *sc, void *arg)
622 1.1 thorpej {
623 1.1 thorpej struct ifbreq *req = arg;
624 1.1 thorpej struct bridge_iflist *bif = NULL;
625 1.1 thorpej struct ifnet *ifs;
626 1.1 thorpej int error = 0;
627 1.1 thorpej
628 1.1 thorpej ifs = ifunit(req->ifbr_ifsname);
629 1.1 thorpej if (ifs == NULL)
630 1.1 thorpej return (ENOENT);
631 1.7 itojun
632 1.7 itojun if (sc->sc_if.if_mtu != ifs->if_mtu)
633 1.7 itojun return (EINVAL);
634 1.1 thorpej
635 1.1 thorpej if (ifs->if_bridge == sc)
636 1.1 thorpej return (EEXIST);
637 1.1 thorpej
638 1.1 thorpej if (ifs->if_bridge != NULL)
639 1.1 thorpej return (EBUSY);
640 1.1 thorpej
641 1.1 thorpej bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT);
642 1.1 thorpej if (bif == NULL)
643 1.1 thorpej return (ENOMEM);
644 1.1 thorpej
645 1.1 thorpej switch (ifs->if_type) {
646 1.1 thorpej case IFT_ETHER:
647 1.1 thorpej /*
648 1.1 thorpej * Place the interface into promiscuous mode.
649 1.1 thorpej */
650 1.1 thorpej error = ifpromisc(ifs, 1);
651 1.1 thorpej if (error)
652 1.1 thorpej goto out;
653 1.1 thorpej break;
654 1.1 thorpej default:
655 1.5 jdolecek error = EINVAL;
656 1.5 jdolecek goto out;
657 1.1 thorpej }
658 1.1 thorpej
659 1.1 thorpej bif->bif_ifp = ifs;
660 1.1 thorpej bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
661 1.1 thorpej bif->bif_priority = BSTP_DEFAULT_PORT_PRIORITY;
662 1.1 thorpej bif->bif_path_cost = BSTP_DEFAULT_PATH_COST;
663 1.1 thorpej
664 1.1 thorpej ifs->if_bridge = sc;
665 1.1 thorpej LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
666 1.1 thorpej
667 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
668 1.1 thorpej bstp_initialization(sc);
669 1.1 thorpej else
670 1.1 thorpej bstp_stop(sc);
671 1.1 thorpej
672 1.1 thorpej out:
673 1.1 thorpej if (error) {
674 1.1 thorpej if (bif != NULL)
675 1.1 thorpej free(bif, M_DEVBUF);
676 1.1 thorpej }
677 1.1 thorpej return (error);
678 1.1 thorpej }
679 1.1 thorpej
680 1.33 thorpej static int
681 1.1 thorpej bridge_ioctl_del(struct bridge_softc *sc, void *arg)
682 1.1 thorpej {
683 1.1 thorpej struct ifbreq *req = arg;
684 1.1 thorpej struct bridge_iflist *bif;
685 1.1 thorpej
686 1.1 thorpej bif = bridge_lookup_member(sc, req->ifbr_ifsname);
687 1.1 thorpej if (bif == NULL)
688 1.1 thorpej return (ENOENT);
689 1.1 thorpej
690 1.1 thorpej bridge_delete_member(sc, bif);
691 1.1 thorpej
692 1.1 thorpej return (0);
693 1.1 thorpej }
694 1.1 thorpej
695 1.33 thorpej static int
696 1.1 thorpej bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
697 1.1 thorpej {
698 1.1 thorpej struct ifbreq *req = arg;
699 1.1 thorpej struct bridge_iflist *bif;
700 1.1 thorpej
701 1.1 thorpej bif = bridge_lookup_member(sc, req->ifbr_ifsname);
702 1.1 thorpej if (bif == NULL)
703 1.1 thorpej return (ENOENT);
704 1.1 thorpej
705 1.1 thorpej req->ifbr_ifsflags = bif->bif_flags;
706 1.1 thorpej req->ifbr_state = bif->bif_state;
707 1.1 thorpej req->ifbr_priority = bif->bif_priority;
708 1.11 bouyer req->ifbr_path_cost = bif->bif_path_cost;
709 1.1 thorpej req->ifbr_portno = bif->bif_ifp->if_index & 0xff;
710 1.1 thorpej
711 1.1 thorpej return (0);
712 1.1 thorpej }
713 1.1 thorpej
714 1.33 thorpej static int
715 1.1 thorpej bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
716 1.1 thorpej {
717 1.1 thorpej struct ifbreq *req = arg;
718 1.1 thorpej struct bridge_iflist *bif;
719 1.1 thorpej
720 1.1 thorpej bif = bridge_lookup_member(sc, req->ifbr_ifsname);
721 1.1 thorpej if (bif == NULL)
722 1.1 thorpej return (ENOENT);
723 1.1 thorpej
724 1.1 thorpej if (req->ifbr_ifsflags & IFBIF_STP) {
725 1.1 thorpej switch (bif->bif_ifp->if_type) {
726 1.1 thorpej case IFT_ETHER:
727 1.1 thorpej /* These can do spanning tree. */
728 1.1 thorpej break;
729 1.1 thorpej
730 1.1 thorpej default:
731 1.1 thorpej /* Nothing else can. */
732 1.1 thorpej return (EINVAL);
733 1.1 thorpej }
734 1.1 thorpej }
735 1.1 thorpej
736 1.1 thorpej bif->bif_flags = req->ifbr_ifsflags;
737 1.1 thorpej
738 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
739 1.1 thorpej bstp_initialization(sc);
740 1.1 thorpej
741 1.1 thorpej return (0);
742 1.1 thorpej }
743 1.1 thorpej
744 1.33 thorpej static int
745 1.1 thorpej bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
746 1.1 thorpej {
747 1.1 thorpej struct ifbrparam *param = arg;
748 1.1 thorpej
749 1.1 thorpej sc->sc_brtmax = param->ifbrp_csize;
750 1.1 thorpej bridge_rttrim(sc);
751 1.1 thorpej
752 1.1 thorpej return (0);
753 1.1 thorpej }
754 1.1 thorpej
755 1.33 thorpej static int
756 1.1 thorpej bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
757 1.1 thorpej {
758 1.1 thorpej struct ifbrparam *param = arg;
759 1.1 thorpej
760 1.1 thorpej param->ifbrp_csize = sc->sc_brtmax;
761 1.1 thorpej
762 1.1 thorpej return (0);
763 1.1 thorpej }
764 1.1 thorpej
765 1.33 thorpej static int
766 1.1 thorpej bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
767 1.1 thorpej {
768 1.1 thorpej struct ifbifconf *bifc = arg;
769 1.1 thorpej struct bridge_iflist *bif;
770 1.1 thorpej struct ifbreq breq;
771 1.1 thorpej int count, len, error = 0;
772 1.1 thorpej
773 1.1 thorpej count = 0;
774 1.1 thorpej LIST_FOREACH(bif, &sc->sc_iflist, bif_next)
775 1.1 thorpej count++;
776 1.1 thorpej
777 1.1 thorpej if (bifc->ifbic_len == 0) {
778 1.1 thorpej bifc->ifbic_len = sizeof(breq) * count;
779 1.1 thorpej return (0);
780 1.1 thorpej }
781 1.1 thorpej
782 1.1 thorpej count = 0;
783 1.1 thorpej len = bifc->ifbic_len;
784 1.36 christos memset(&breq, 0, sizeof breq);
785 1.1 thorpej LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
786 1.1 thorpej if (len < sizeof(breq))
787 1.1 thorpej break;
788 1.1 thorpej
789 1.13 itojun strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
790 1.13 itojun sizeof(breq.ifbr_ifsname));
791 1.1 thorpej breq.ifbr_ifsflags = bif->bif_flags;
792 1.1 thorpej breq.ifbr_state = bif->bif_state;
793 1.1 thorpej breq.ifbr_priority = bif->bif_priority;
794 1.11 bouyer breq.ifbr_path_cost = bif->bif_path_cost;
795 1.1 thorpej breq.ifbr_portno = bif->bif_ifp->if_index & 0xff;
796 1.1 thorpej error = copyout(&breq, bifc->ifbic_req + count, sizeof(breq));
797 1.1 thorpej if (error)
798 1.1 thorpej break;
799 1.1 thorpej count++;
800 1.1 thorpej len -= sizeof(breq);
801 1.1 thorpej }
802 1.1 thorpej
803 1.1 thorpej bifc->ifbic_len = sizeof(breq) * count;
804 1.1 thorpej return (error);
805 1.1 thorpej }
806 1.1 thorpej
807 1.33 thorpej static int
808 1.1 thorpej bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
809 1.1 thorpej {
810 1.1 thorpej struct ifbaconf *bac = arg;
811 1.1 thorpej struct bridge_rtnode *brt;
812 1.1 thorpej struct ifbareq bareq;
813 1.1 thorpej int count = 0, error = 0, len;
814 1.1 thorpej
815 1.1 thorpej if (bac->ifbac_len == 0)
816 1.1 thorpej return (0);
817 1.1 thorpej
818 1.1 thorpej len = bac->ifbac_len;
819 1.1 thorpej LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
820 1.1 thorpej if (len < sizeof(bareq))
821 1.1 thorpej goto out;
822 1.35 christos memset(&bareq, 0, sizeof(bareq));
823 1.13 itojun strlcpy(bareq.ifba_ifsname, brt->brt_ifp->if_xname,
824 1.13 itojun sizeof(bareq.ifba_ifsname));
825 1.1 thorpej memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
826 1.39 kardel if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
827 1.39 kardel bareq.ifba_expire = brt->brt_expire - time_uptime;
828 1.39 kardel } else
829 1.2 thorpej bareq.ifba_expire = 0;
830 1.1 thorpej bareq.ifba_flags = brt->brt_flags;
831 1.1 thorpej
832 1.1 thorpej error = copyout(&bareq, bac->ifbac_req + count, sizeof(bareq));
833 1.1 thorpej if (error)
834 1.1 thorpej goto out;
835 1.1 thorpej count++;
836 1.1 thorpej len -= sizeof(bareq);
837 1.1 thorpej }
838 1.1 thorpej out:
839 1.1 thorpej bac->ifbac_len = sizeof(bareq) * count;
840 1.1 thorpej return (error);
841 1.1 thorpej }
842 1.1 thorpej
843 1.33 thorpej static int
844 1.1 thorpej bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
845 1.1 thorpej {
846 1.1 thorpej struct ifbareq *req = arg;
847 1.1 thorpej struct bridge_iflist *bif;
848 1.1 thorpej int error;
849 1.1 thorpej
850 1.1 thorpej bif = bridge_lookup_member(sc, req->ifba_ifsname);
851 1.1 thorpej if (bif == NULL)
852 1.1 thorpej return (ENOENT);
853 1.1 thorpej
854 1.1 thorpej error = bridge_rtupdate(sc, req->ifba_dst, bif->bif_ifp, 1,
855 1.1 thorpej req->ifba_flags);
856 1.1 thorpej
857 1.1 thorpej return (error);
858 1.1 thorpej }
859 1.1 thorpej
860 1.33 thorpej static int
861 1.1 thorpej bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
862 1.1 thorpej {
863 1.1 thorpej struct ifbrparam *param = arg;
864 1.1 thorpej
865 1.1 thorpej sc->sc_brttimeout = param->ifbrp_ctime;
866 1.1 thorpej
867 1.1 thorpej return (0);
868 1.1 thorpej }
869 1.1 thorpej
870 1.33 thorpej static int
871 1.1 thorpej bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
872 1.1 thorpej {
873 1.1 thorpej struct ifbrparam *param = arg;
874 1.1 thorpej
875 1.1 thorpej param->ifbrp_ctime = sc->sc_brttimeout;
876 1.1 thorpej
877 1.1 thorpej return (0);
878 1.1 thorpej }
879 1.1 thorpej
880 1.33 thorpej static int
881 1.1 thorpej bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
882 1.1 thorpej {
883 1.1 thorpej struct ifbareq *req = arg;
884 1.1 thorpej
885 1.1 thorpej return (bridge_rtdaddr(sc, req->ifba_dst));
886 1.1 thorpej }
887 1.1 thorpej
888 1.33 thorpej static int
889 1.1 thorpej bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
890 1.1 thorpej {
891 1.1 thorpej struct ifbreq *req = arg;
892 1.1 thorpej
893 1.1 thorpej bridge_rtflush(sc, req->ifbr_ifsflags);
894 1.1 thorpej
895 1.1 thorpej return (0);
896 1.1 thorpej }
897 1.1 thorpej
898 1.33 thorpej static int
899 1.1 thorpej bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
900 1.1 thorpej {
901 1.1 thorpej struct ifbrparam *param = arg;
902 1.1 thorpej
903 1.1 thorpej param->ifbrp_prio = sc->sc_bridge_priority;
904 1.1 thorpej
905 1.1 thorpej return (0);
906 1.1 thorpej }
907 1.1 thorpej
908 1.33 thorpej static int
909 1.1 thorpej bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
910 1.1 thorpej {
911 1.1 thorpej struct ifbrparam *param = arg;
912 1.1 thorpej
913 1.1 thorpej sc->sc_bridge_priority = param->ifbrp_prio;
914 1.1 thorpej
915 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
916 1.1 thorpej bstp_initialization(sc);
917 1.1 thorpej
918 1.1 thorpej return (0);
919 1.1 thorpej }
920 1.1 thorpej
921 1.33 thorpej static int
922 1.1 thorpej bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
923 1.1 thorpej {
924 1.1 thorpej struct ifbrparam *param = arg;
925 1.1 thorpej
926 1.1 thorpej param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
927 1.1 thorpej
928 1.1 thorpej return (0);
929 1.1 thorpej }
930 1.1 thorpej
931 1.33 thorpej static int
932 1.1 thorpej bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
933 1.1 thorpej {
934 1.1 thorpej struct ifbrparam *param = arg;
935 1.1 thorpej
936 1.1 thorpej if (param->ifbrp_hellotime == 0)
937 1.1 thorpej return (EINVAL);
938 1.1 thorpej sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
939 1.1 thorpej
940 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
941 1.1 thorpej bstp_initialization(sc);
942 1.1 thorpej
943 1.1 thorpej return (0);
944 1.1 thorpej }
945 1.1 thorpej
946 1.33 thorpej static int
947 1.1 thorpej bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
948 1.1 thorpej {
949 1.1 thorpej struct ifbrparam *param = arg;
950 1.1 thorpej
951 1.1 thorpej param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
952 1.1 thorpej
953 1.1 thorpej return (0);
954 1.1 thorpej }
955 1.1 thorpej
956 1.33 thorpej static int
957 1.1 thorpej bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
958 1.1 thorpej {
959 1.29 perry struct ifbrparam *param = arg;
960 1.1 thorpej
961 1.1 thorpej if (param->ifbrp_fwddelay == 0)
962 1.1 thorpej return (EINVAL);
963 1.1 thorpej sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
964 1.1 thorpej
965 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
966 1.1 thorpej bstp_initialization(sc);
967 1.1 thorpej
968 1.1 thorpej return (0);
969 1.1 thorpej }
970 1.1 thorpej
971 1.33 thorpej static int
972 1.1 thorpej bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
973 1.1 thorpej {
974 1.1 thorpej struct ifbrparam *param = arg;
975 1.1 thorpej
976 1.1 thorpej param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
977 1.1 thorpej
978 1.1 thorpej return (0);
979 1.1 thorpej }
980 1.1 thorpej
981 1.33 thorpej static int
982 1.1 thorpej bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
983 1.1 thorpej {
984 1.1 thorpej struct ifbrparam *param = arg;
985 1.1 thorpej
986 1.1 thorpej if (param->ifbrp_maxage == 0)
987 1.1 thorpej return (EINVAL);
988 1.1 thorpej sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
989 1.1 thorpej
990 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
991 1.1 thorpej bstp_initialization(sc);
992 1.1 thorpej
993 1.1 thorpej return (0);
994 1.1 thorpej }
995 1.1 thorpej
996 1.33 thorpej static int
997 1.1 thorpej bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
998 1.1 thorpej {
999 1.1 thorpej struct ifbreq *req = arg;
1000 1.1 thorpej struct bridge_iflist *bif;
1001 1.1 thorpej
1002 1.1 thorpej bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1003 1.1 thorpej if (bif == NULL)
1004 1.1 thorpej return (ENOENT);
1005 1.1 thorpej
1006 1.1 thorpej bif->bif_priority = req->ifbr_priority;
1007 1.1 thorpej
1008 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
1009 1.1 thorpej bstp_initialization(sc);
1010 1.1 thorpej
1011 1.1 thorpej return (0);
1012 1.1 thorpej }
1013 1.1 thorpej
1014 1.25 christos #if defined(BRIDGE_IPF) && defined(PFIL_HOOKS)
1015 1.33 thorpej static int
1016 1.9 perseant bridge_ioctl_gfilt(struct bridge_softc *sc, void *arg)
1017 1.9 perseant {
1018 1.9 perseant struct ifbrparam *param = arg;
1019 1.9 perseant
1020 1.9 perseant param->ifbrp_filter = sc->sc_filter_flags;
1021 1.9 perseant
1022 1.9 perseant return (0);
1023 1.9 perseant }
1024 1.9 perseant
1025 1.33 thorpej static int
1026 1.9 perseant bridge_ioctl_sfilt(struct bridge_softc *sc, void *arg)
1027 1.9 perseant {
1028 1.29 perry struct ifbrparam *param = arg;
1029 1.9 perseant uint32_t nflags, oflags;
1030 1.9 perseant
1031 1.9 perseant if (param->ifbrp_filter & ~IFBF_FILT_MASK)
1032 1.9 perseant return (EINVAL);
1033 1.9 perseant
1034 1.9 perseant nflags = param->ifbrp_filter;
1035 1.9 perseant oflags = sc->sc_filter_flags;
1036 1.9 perseant
1037 1.9 perseant if ((nflags & IFBF_FILT_USEIPF) && !(oflags & IFBF_FILT_USEIPF)) {
1038 1.9 perseant pfil_add_hook((void *)bridge_ipf, NULL, PFIL_IN|PFIL_OUT,
1039 1.9 perseant &sc->sc_if.if_pfil);
1040 1.9 perseant }
1041 1.9 perseant if (!(nflags & IFBF_FILT_USEIPF) && (oflags & IFBF_FILT_USEIPF)) {
1042 1.9 perseant pfil_remove_hook((void *)bridge_ipf, NULL, PFIL_IN|PFIL_OUT,
1043 1.9 perseant &sc->sc_if.if_pfil);
1044 1.9 perseant }
1045 1.9 perseant
1046 1.9 perseant sc->sc_filter_flags = nflags;
1047 1.9 perseant
1048 1.9 perseant return (0);
1049 1.9 perseant }
1050 1.25 christos #endif /* BRIDGE_IPF && PFIL_HOOKS */
1051 1.9 perseant
1052 1.33 thorpej static int
1053 1.11 bouyer bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1054 1.11 bouyer {
1055 1.11 bouyer struct ifbreq *req = arg;
1056 1.11 bouyer struct bridge_iflist *bif;
1057 1.11 bouyer
1058 1.11 bouyer bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1059 1.11 bouyer if (bif == NULL)
1060 1.11 bouyer return (ENOENT);
1061 1.11 bouyer
1062 1.11 bouyer bif->bif_path_cost = req->ifbr_path_cost;
1063 1.11 bouyer
1064 1.11 bouyer if (sc->sc_if.if_flags & IFF_RUNNING)
1065 1.11 bouyer bstp_initialization(sc);
1066 1.11 bouyer
1067 1.11 bouyer return (0);
1068 1.11 bouyer }
1069 1.11 bouyer
1070 1.1 thorpej /*
1071 1.1 thorpej * bridge_ifdetach:
1072 1.1 thorpej *
1073 1.1 thorpej * Detach an interface from a bridge. Called when a member
1074 1.1 thorpej * interface is detaching.
1075 1.1 thorpej */
1076 1.1 thorpej void
1077 1.1 thorpej bridge_ifdetach(struct ifnet *ifp)
1078 1.1 thorpej {
1079 1.1 thorpej struct bridge_softc *sc = ifp->if_bridge;
1080 1.1 thorpej struct ifbreq breq;
1081 1.1 thorpej
1082 1.1 thorpej memset(&breq, 0, sizeof(breq));
1083 1.24 itojun snprintf(breq.ifbr_ifsname, sizeof(breq.ifbr_ifsname), ifp->if_xname);
1084 1.1 thorpej
1085 1.1 thorpej (void) bridge_ioctl_del(sc, &breq);
1086 1.1 thorpej }
1087 1.1 thorpej
1088 1.1 thorpej /*
1089 1.1 thorpej * bridge_init:
1090 1.1 thorpej *
1091 1.1 thorpej * Initialize a bridge interface.
1092 1.1 thorpej */
1093 1.33 thorpej static int
1094 1.1 thorpej bridge_init(struct ifnet *ifp)
1095 1.1 thorpej {
1096 1.1 thorpej struct bridge_softc *sc = ifp->if_softc;
1097 1.1 thorpej
1098 1.1 thorpej if (ifp->if_flags & IFF_RUNNING)
1099 1.1 thorpej return (0);
1100 1.1 thorpej
1101 1.1 thorpej callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
1102 1.1 thorpej bridge_timer, sc);
1103 1.1 thorpej
1104 1.1 thorpej ifp->if_flags |= IFF_RUNNING;
1105 1.11 bouyer bstp_initialization(sc);
1106 1.1 thorpej return (0);
1107 1.1 thorpej }
1108 1.1 thorpej
1109 1.1 thorpej /*
1110 1.1 thorpej * bridge_stop:
1111 1.1 thorpej *
1112 1.1 thorpej * Stop the bridge interface.
1113 1.1 thorpej */
1114 1.33 thorpej static void
1115 1.45 christos bridge_stop(struct ifnet *ifp, int disable)
1116 1.1 thorpej {
1117 1.1 thorpej struct bridge_softc *sc = ifp->if_softc;
1118 1.1 thorpej
1119 1.1 thorpej if ((ifp->if_flags & IFF_RUNNING) == 0)
1120 1.1 thorpej return;
1121 1.1 thorpej
1122 1.1 thorpej callout_stop(&sc->sc_brcallout);
1123 1.1 thorpej bstp_stop(sc);
1124 1.1 thorpej
1125 1.1 thorpej IF_PURGE(&ifp->if_snd);
1126 1.1 thorpej
1127 1.1 thorpej bridge_rtflush(sc, IFBF_FLUSHDYN);
1128 1.1 thorpej
1129 1.1 thorpej ifp->if_flags &= ~IFF_RUNNING;
1130 1.1 thorpej }
1131 1.1 thorpej
1132 1.1 thorpej /*
1133 1.1 thorpej * bridge_enqueue:
1134 1.1 thorpej *
1135 1.1 thorpej * Enqueue a packet on a bridge member interface.
1136 1.1 thorpej *
1137 1.1 thorpej * NOTE: must be called at splnet().
1138 1.1 thorpej */
1139 1.33 thorpej void
1140 1.18 jdc bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m,
1141 1.18 jdc int runfilt)
1142 1.1 thorpej {
1143 1.1 thorpej ALTQ_DECL(struct altq_pktattr pktattr;)
1144 1.1 thorpej int len, error;
1145 1.1 thorpej short mflags;
1146 1.1 thorpej
1147 1.26 bad /*
1148 1.26 bad * Clear any in-bound checksum flags for this packet.
1149 1.26 bad */
1150 1.26 bad m->m_pkthdr.csum_flags = 0;
1151 1.26 bad
1152 1.9 perseant #ifdef PFIL_HOOKS
1153 1.18 jdc if (runfilt) {
1154 1.22 jdc if (pfil_run_hooks(&sc->sc_if.if_pfil, &m,
1155 1.22 jdc dst_ifp, PFIL_OUT) != 0) {
1156 1.22 jdc if (m != NULL)
1157 1.22 jdc m_freem(m);
1158 1.18 jdc return;
1159 1.18 jdc }
1160 1.22 jdc if (m == NULL)
1161 1.22 jdc return;
1162 1.9 perseant }
1163 1.9 perseant #endif /* PFIL_HOOKS */
1164 1.9 perseant
1165 1.1 thorpej #ifdef ALTQ
1166 1.1 thorpej /*
1167 1.1 thorpej * If ALTQ is enabled on the member interface, do
1168 1.1 thorpej * classification; the queueing discipline might
1169 1.1 thorpej * not require classification, but might require
1170 1.1 thorpej * the address family/header pointer in the pktattr.
1171 1.1 thorpej */
1172 1.1 thorpej if (ALTQ_IS_ENABLED(&dst_ifp->if_snd)) {
1173 1.1 thorpej /* XXX IFT_ETHER */
1174 1.1 thorpej altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
1175 1.1 thorpej }
1176 1.1 thorpej #endif /* ALTQ */
1177 1.1 thorpej
1178 1.1 thorpej len = m->m_pkthdr.len;
1179 1.28 kim m->m_flags |= M_PROTO1;
1180 1.1 thorpej mflags = m->m_flags;
1181 1.1 thorpej IFQ_ENQUEUE(&dst_ifp->if_snd, m, &pktattr, error);
1182 1.1 thorpej if (error) {
1183 1.1 thorpej /* mbuf is already freed */
1184 1.1 thorpej sc->sc_if.if_oerrors++;
1185 1.1 thorpej return;
1186 1.1 thorpej }
1187 1.1 thorpej
1188 1.1 thorpej sc->sc_if.if_opackets++;
1189 1.1 thorpej sc->sc_if.if_obytes += len;
1190 1.1 thorpej
1191 1.1 thorpej dst_ifp->if_obytes += len;
1192 1.1 thorpej
1193 1.1 thorpej if (mflags & M_MCAST) {
1194 1.1 thorpej sc->sc_if.if_omcasts++;
1195 1.1 thorpej dst_ifp->if_omcasts++;
1196 1.1 thorpej }
1197 1.1 thorpej
1198 1.1 thorpej if ((dst_ifp->if_flags & IFF_OACTIVE) == 0)
1199 1.1 thorpej (*dst_ifp->if_start)(dst_ifp);
1200 1.1 thorpej }
1201 1.1 thorpej
1202 1.1 thorpej /*
1203 1.1 thorpej * bridge_output:
1204 1.1 thorpej *
1205 1.1 thorpej * Send output from a bridge member interface. This
1206 1.1 thorpej * performs the bridging function for locally originated
1207 1.1 thorpej * packets.
1208 1.1 thorpej *
1209 1.1 thorpej * The mbuf has the Ethernet header already attached. We must
1210 1.1 thorpej * enqueue or free the mbuf before returning.
1211 1.1 thorpej */
1212 1.1 thorpej int
1213 1.48 dyoung bridge_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *sa,
1214 1.45 christos struct rtentry *rt)
1215 1.1 thorpej {
1216 1.1 thorpej struct ether_header *eh;
1217 1.1 thorpej struct ifnet *dst_if;
1218 1.1 thorpej struct bridge_softc *sc;
1219 1.1 thorpej int s;
1220 1.1 thorpej
1221 1.1 thorpej if (m->m_len < ETHER_HDR_LEN) {
1222 1.1 thorpej m = m_pullup(m, ETHER_HDR_LEN);
1223 1.1 thorpej if (m == NULL)
1224 1.1 thorpej return (0);
1225 1.1 thorpej }
1226 1.1 thorpej
1227 1.1 thorpej eh = mtod(m, struct ether_header *);
1228 1.1 thorpej sc = ifp->if_bridge;
1229 1.1 thorpej
1230 1.1 thorpej s = splnet();
1231 1.1 thorpej
1232 1.1 thorpej /*
1233 1.1 thorpej * If bridge is down, but the original output interface is up,
1234 1.1 thorpej * go ahead and send out that interface. Otherwise, the packet
1235 1.1 thorpej * is dropped below.
1236 1.1 thorpej */
1237 1.1 thorpej if ((sc->sc_if.if_flags & IFF_RUNNING) == 0) {
1238 1.1 thorpej dst_if = ifp;
1239 1.1 thorpej goto sendunicast;
1240 1.1 thorpej }
1241 1.1 thorpej
1242 1.1 thorpej /*
1243 1.1 thorpej * If the packet is a multicast, or we don't know a better way to
1244 1.1 thorpej * get there, send to all interfaces.
1245 1.1 thorpej */
1246 1.1 thorpej if (ETHER_IS_MULTICAST(eh->ether_dhost))
1247 1.1 thorpej dst_if = NULL;
1248 1.1 thorpej else
1249 1.1 thorpej dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1250 1.1 thorpej if (dst_if == NULL) {
1251 1.1 thorpej struct bridge_iflist *bif;
1252 1.1 thorpej struct mbuf *mc;
1253 1.1 thorpej int used = 0;
1254 1.1 thorpej
1255 1.1 thorpej LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1256 1.1 thorpej dst_if = bif->bif_ifp;
1257 1.1 thorpej if ((dst_if->if_flags & IFF_RUNNING) == 0)
1258 1.1 thorpej continue;
1259 1.1 thorpej
1260 1.1 thorpej /*
1261 1.1 thorpej * If this is not the original output interface,
1262 1.1 thorpej * and the interface is participating in spanning
1263 1.1 thorpej * tree, make sure the port is in a state that
1264 1.1 thorpej * allows forwarding.
1265 1.1 thorpej */
1266 1.1 thorpej if (dst_if != ifp &&
1267 1.1 thorpej (bif->bif_flags & IFBIF_STP) != 0) {
1268 1.1 thorpej switch (bif->bif_state) {
1269 1.1 thorpej case BSTP_IFSTATE_BLOCKING:
1270 1.1 thorpej case BSTP_IFSTATE_LISTENING:
1271 1.1 thorpej case BSTP_IFSTATE_DISABLED:
1272 1.1 thorpej continue;
1273 1.1 thorpej }
1274 1.1 thorpej }
1275 1.1 thorpej
1276 1.1 thorpej if (LIST_NEXT(bif, bif_next) == NULL) {
1277 1.1 thorpej used = 1;
1278 1.1 thorpej mc = m;
1279 1.1 thorpej } else {
1280 1.1 thorpej mc = m_copym(m, 0, M_COPYALL, M_NOWAIT);
1281 1.1 thorpej if (mc == NULL) {
1282 1.1 thorpej sc->sc_if.if_oerrors++;
1283 1.1 thorpej continue;
1284 1.1 thorpej }
1285 1.1 thorpej }
1286 1.1 thorpej
1287 1.18 jdc bridge_enqueue(sc, dst_if, mc, 0);
1288 1.1 thorpej }
1289 1.1 thorpej if (used == 0)
1290 1.1 thorpej m_freem(m);
1291 1.1 thorpej splx(s);
1292 1.1 thorpej return (0);
1293 1.1 thorpej }
1294 1.1 thorpej
1295 1.1 thorpej sendunicast:
1296 1.1 thorpej /*
1297 1.1 thorpej * XXX Spanning tree consideration here?
1298 1.1 thorpej */
1299 1.1 thorpej
1300 1.1 thorpej if ((dst_if->if_flags & IFF_RUNNING) == 0) {
1301 1.1 thorpej m_freem(m);
1302 1.1 thorpej splx(s);
1303 1.1 thorpej return (0);
1304 1.1 thorpej }
1305 1.1 thorpej
1306 1.18 jdc bridge_enqueue(sc, dst_if, m, 0);
1307 1.1 thorpej
1308 1.1 thorpej splx(s);
1309 1.1 thorpej return (0);
1310 1.1 thorpej }
1311 1.1 thorpej
1312 1.1 thorpej /*
1313 1.1 thorpej * bridge_start:
1314 1.1 thorpej *
1315 1.1 thorpej * Start output on a bridge.
1316 1.1 thorpej *
1317 1.1 thorpej * NOTE: This routine should never be called in this implementation.
1318 1.1 thorpej */
1319 1.33 thorpej static void
1320 1.1 thorpej bridge_start(struct ifnet *ifp)
1321 1.1 thorpej {
1322 1.1 thorpej
1323 1.1 thorpej printf("%s: bridge_start() called\n", ifp->if_xname);
1324 1.1 thorpej }
1325 1.1 thorpej
1326 1.1 thorpej /*
1327 1.1 thorpej * bridge_forward:
1328 1.1 thorpej *
1329 1.21 augustss * The forwarding function of the bridge.
1330 1.1 thorpej */
1331 1.33 thorpej static void
1332 1.65 bouyer bridge_forward(void *v)
1333 1.1 thorpej {
1334 1.65 bouyer struct bridge_softc *sc = v;
1335 1.65 bouyer struct mbuf *m;
1336 1.1 thorpej struct bridge_iflist *bif;
1337 1.1 thorpej struct ifnet *src_if, *dst_if;
1338 1.1 thorpej struct ether_header *eh;
1339 1.65 bouyer int s;
1340 1.1 thorpej
1341 1.66 bouyer mutex_enter(softnet_lock);
1342 1.66 bouyer if ((sc->sc_if.if_flags & IFF_RUNNING) == 0) {
1343 1.66 bouyer mutex_exit(softnet_lock);
1344 1.65 bouyer return;
1345 1.66 bouyer }
1346 1.1 thorpej
1347 1.66 bouyer s = splnet();
1348 1.65 bouyer while (1) {
1349 1.65 bouyer IFQ_POLL(&sc->sc_if.if_snd, m);
1350 1.65 bouyer if (m == NULL)
1351 1.65 bouyer break;
1352 1.65 bouyer IFQ_DEQUEUE(&sc->sc_if.if_snd, m);
1353 1.1 thorpej
1354 1.65 bouyer src_if = m->m_pkthdr.rcvif;
1355 1.65 bouyer
1356 1.65 bouyer sc->sc_if.if_ipackets++;
1357 1.65 bouyer sc->sc_if.if_ibytes += m->m_pkthdr.len;
1358 1.1 thorpej
1359 1.65 bouyer /*
1360 1.65 bouyer * Look up the bridge_iflist.
1361 1.65 bouyer */
1362 1.65 bouyer bif = bridge_lookup_member_if(sc, src_if);
1363 1.65 bouyer if (bif == NULL) {
1364 1.65 bouyer /* Interface is not a bridge member (anymore?) */
1365 1.1 thorpej m_freem(m);
1366 1.65 bouyer continue;
1367 1.65 bouyer }
1368 1.65 bouyer
1369 1.65 bouyer if (bif->bif_flags & IFBIF_STP) {
1370 1.65 bouyer switch (bif->bif_state) {
1371 1.65 bouyer case BSTP_IFSTATE_BLOCKING:
1372 1.65 bouyer case BSTP_IFSTATE_LISTENING:
1373 1.65 bouyer case BSTP_IFSTATE_DISABLED:
1374 1.65 bouyer m_freem(m);
1375 1.65 bouyer continue;
1376 1.65 bouyer }
1377 1.1 thorpej }
1378 1.1 thorpej
1379 1.65 bouyer eh = mtod(m, struct ether_header *);
1380 1.1 thorpej
1381 1.65 bouyer /*
1382 1.65 bouyer * If the interface is learning, and the source
1383 1.65 bouyer * address is valid and not multicast, record
1384 1.65 bouyer * the address.
1385 1.65 bouyer */
1386 1.65 bouyer if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
1387 1.65 bouyer ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
1388 1.65 bouyer (eh->ether_shost[0] == 0 &&
1389 1.65 bouyer eh->ether_shost[1] == 0 &&
1390 1.65 bouyer eh->ether_shost[2] == 0 &&
1391 1.65 bouyer eh->ether_shost[3] == 0 &&
1392 1.65 bouyer eh->ether_shost[4] == 0 &&
1393 1.65 bouyer eh->ether_shost[5] == 0) == 0) {
1394 1.65 bouyer (void) bridge_rtupdate(sc, eh->ether_shost,
1395 1.65 bouyer src_if, 0, IFBAF_DYNAMIC);
1396 1.65 bouyer }
1397 1.1 thorpej
1398 1.65 bouyer if ((bif->bif_flags & IFBIF_STP) != 0 &&
1399 1.65 bouyer bif->bif_state == BSTP_IFSTATE_LEARNING) {
1400 1.65 bouyer m_freem(m);
1401 1.65 bouyer continue;
1402 1.65 bouyer }
1403 1.1 thorpej
1404 1.65 bouyer /*
1405 1.65 bouyer * At this point, the port either doesn't participate
1406 1.65 bouyer * in spanning tree or it is in the forwarding state.
1407 1.65 bouyer */
1408 1.1 thorpej
1409 1.65 bouyer /*
1410 1.65 bouyer * If the packet is unicast, destined for someone on
1411 1.65 bouyer * "this" side of the bridge, drop it.
1412 1.65 bouyer */
1413 1.65 bouyer if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
1414 1.65 bouyer dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1415 1.65 bouyer if (src_if == dst_if) {
1416 1.65 bouyer m_freem(m);
1417 1.65 bouyer continue;
1418 1.65 bouyer }
1419 1.65 bouyer } else {
1420 1.65 bouyer /* ...forward it to all interfaces. */
1421 1.65 bouyer sc->sc_if.if_imcasts++;
1422 1.65 bouyer dst_if = NULL;
1423 1.1 thorpej }
1424 1.1 thorpej
1425 1.9 perseant #ifdef PFIL_HOOKS
1426 1.65 bouyer if (pfil_run_hooks(&sc->sc_if.if_pfil, &m,
1427 1.65 bouyer m->m_pkthdr.rcvif, PFIL_IN) != 0) {
1428 1.65 bouyer if (m != NULL)
1429 1.65 bouyer m_freem(m);
1430 1.65 bouyer continue;
1431 1.65 bouyer }
1432 1.65 bouyer if (m == NULL)
1433 1.65 bouyer continue;
1434 1.9 perseant #endif /* PFIL_HOOKS */
1435 1.9 perseant
1436 1.65 bouyer if (dst_if == NULL) {
1437 1.65 bouyer bridge_broadcast(sc, src_if, m);
1438 1.65 bouyer continue;
1439 1.65 bouyer }
1440 1.1 thorpej
1441 1.65 bouyer /*
1442 1.65 bouyer * At this point, we're dealing with a unicast frame
1443 1.65 bouyer * going to a different interface.
1444 1.65 bouyer */
1445 1.65 bouyer if ((dst_if->if_flags & IFF_RUNNING) == 0) {
1446 1.65 bouyer m_freem(m);
1447 1.65 bouyer continue;
1448 1.65 bouyer }
1449 1.65 bouyer bif = bridge_lookup_member_if(sc, dst_if);
1450 1.65 bouyer if (bif == NULL) {
1451 1.65 bouyer /* Not a member of the bridge (anymore?) */
1452 1.65 bouyer m_freem(m);
1453 1.65 bouyer continue;
1454 1.65 bouyer }
1455 1.1 thorpej
1456 1.65 bouyer if (bif->bif_flags & IFBIF_STP) {
1457 1.65 bouyer switch (bif->bif_state) {
1458 1.65 bouyer case BSTP_IFSTATE_DISABLED:
1459 1.65 bouyer case BSTP_IFSTATE_BLOCKING:
1460 1.65 bouyer m_freem(m);
1461 1.65 bouyer continue;
1462 1.65 bouyer }
1463 1.1 thorpej }
1464 1.65 bouyer
1465 1.65 bouyer bridge_enqueue(sc, dst_if, m, 1);
1466 1.1 thorpej }
1467 1.65 bouyer splx(s);
1468 1.66 bouyer mutex_exit(softnet_lock);
1469 1.1 thorpej }
1470 1.1 thorpej
1471 1.1 thorpej /*
1472 1.1 thorpej * bridge_input:
1473 1.1 thorpej *
1474 1.1 thorpej * Receive input from a member interface. Queue the packet for
1475 1.1 thorpej * bridging if it is not for us.
1476 1.67 bouyer * should be called at splnet()
1477 1.1 thorpej */
1478 1.1 thorpej struct mbuf *
1479 1.1 thorpej bridge_input(struct ifnet *ifp, struct mbuf *m)
1480 1.1 thorpej {
1481 1.1 thorpej struct bridge_softc *sc = ifp->if_bridge;
1482 1.1 thorpej struct bridge_iflist *bif;
1483 1.1 thorpej struct ether_header *eh;
1484 1.1 thorpej struct mbuf *mc;
1485 1.1 thorpej
1486 1.1 thorpej if ((sc->sc_if.if_flags & IFF_RUNNING) == 0)
1487 1.1 thorpej return (m);
1488 1.1 thorpej
1489 1.8 martin bif = bridge_lookup_member_if(sc, ifp);
1490 1.1 thorpej if (bif == NULL)
1491 1.1 thorpej return (m);
1492 1.1 thorpej
1493 1.1 thorpej eh = mtod(m, struct ether_header *);
1494 1.1 thorpej
1495 1.1 thorpej if (m->m_flags & (M_BCAST|M_MCAST)) {
1496 1.64 mrg if (bif->bif_flags & IFBIF_STP) {
1497 1.64 mrg /* Tap off 802.1D packets; they do not get forwarded. */
1498 1.64 mrg if (memcmp(eh->ether_dhost, bstp_etheraddr,
1499 1.64 mrg ETHER_ADDR_LEN) == 0) {
1500 1.64 mrg m = bstp_input(sc, bif, m);
1501 1.64 mrg if (m == NULL)
1502 1.64 mrg return (NULL);
1503 1.64 mrg }
1504 1.1 thorpej
1505 1.1 thorpej switch (bif->bif_state) {
1506 1.1 thorpej case BSTP_IFSTATE_BLOCKING:
1507 1.1 thorpej case BSTP_IFSTATE_LISTENING:
1508 1.1 thorpej case BSTP_IFSTATE_DISABLED:
1509 1.1 thorpej return (m);
1510 1.1 thorpej }
1511 1.1 thorpej }
1512 1.1 thorpej
1513 1.1 thorpej /*
1514 1.1 thorpej * Make a deep copy of the packet and enqueue the copy
1515 1.1 thorpej * for bridge processing; return the original packet for
1516 1.1 thorpej * local processing.
1517 1.1 thorpej */
1518 1.65 bouyer if (IF_QFULL(&sc->sc_if.if_snd)) {
1519 1.65 bouyer IF_DROP(&sc->sc_if.if_snd);
1520 1.65 bouyer return (m);
1521 1.65 bouyer }
1522 1.1 thorpej mc = m_dup(m, 0, M_COPYALL, M_NOWAIT);
1523 1.1 thorpej if (mc == NULL)
1524 1.1 thorpej return (m);
1525 1.1 thorpej
1526 1.1 thorpej /* Perform the bridge forwarding function with the copy. */
1527 1.65 bouyer IF_ENQUEUE(&sc->sc_if.if_snd, mc);
1528 1.65 bouyer softint_schedule(sc->sc_softintr);
1529 1.1 thorpej
1530 1.1 thorpej /* Return the original packet for local processing. */
1531 1.1 thorpej return (m);
1532 1.1 thorpej }
1533 1.1 thorpej
1534 1.1 thorpej if (bif->bif_flags & IFBIF_STP) {
1535 1.1 thorpej switch (bif->bif_state) {
1536 1.1 thorpej case BSTP_IFSTATE_BLOCKING:
1537 1.1 thorpej case BSTP_IFSTATE_LISTENING:
1538 1.1 thorpej case BSTP_IFSTATE_DISABLED:
1539 1.1 thorpej return (m);
1540 1.1 thorpej }
1541 1.1 thorpej }
1542 1.1 thorpej
1543 1.1 thorpej /*
1544 1.1 thorpej * Unicast. Make sure it's not for us.
1545 1.1 thorpej */
1546 1.1 thorpej LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1547 1.1 thorpej /* It is destined for us. */
1548 1.54 dyoung if (memcmp(CLLADDR(bif->bif_ifp->if_sadl), eh->ether_dhost,
1549 1.38 liamjfoy ETHER_ADDR_LEN) == 0
1550 1.38 liamjfoy #if NCARP > 0
1551 1.38 liamjfoy || (bif->bif_ifp->if_carp && carp_ourether(bif->bif_ifp->if_carp,
1552 1.38 liamjfoy eh, IFT_ETHER, 0) != NULL)
1553 1.38 liamjfoy #endif /* NCARP > 0 */
1554 1.38 liamjfoy ) {
1555 1.1 thorpej if (bif->bif_flags & IFBIF_LEARNING)
1556 1.1 thorpej (void) bridge_rtupdate(sc,
1557 1.1 thorpej eh->ether_shost, ifp, 0, IFBAF_DYNAMIC);
1558 1.1 thorpej m->m_pkthdr.rcvif = bif->bif_ifp;
1559 1.1 thorpej return (m);
1560 1.1 thorpej }
1561 1.1 thorpej
1562 1.1 thorpej /* We just received a packet that we sent out. */
1563 1.53 dyoung if (memcmp(CLLADDR(bif->bif_ifp->if_sadl), eh->ether_shost,
1564 1.38 liamjfoy ETHER_ADDR_LEN) == 0
1565 1.38 liamjfoy #if NCARP > 0
1566 1.38 liamjfoy || (bif->bif_ifp->if_carp && carp_ourether(bif->bif_ifp->if_carp,
1567 1.38 liamjfoy eh, IFT_ETHER, 1) != NULL)
1568 1.38 liamjfoy #endif /* NCARP > 0 */
1569 1.38 liamjfoy ) {
1570 1.1 thorpej m_freem(m);
1571 1.1 thorpej return (NULL);
1572 1.1 thorpej }
1573 1.1 thorpej }
1574 1.1 thorpej
1575 1.1 thorpej /* Perform the bridge forwarding function. */
1576 1.65 bouyer if (IF_QFULL(&sc->sc_if.if_snd)) {
1577 1.65 bouyer IF_DROP(&sc->sc_if.if_snd);
1578 1.65 bouyer m_freem(m);
1579 1.65 bouyer return (NULL);
1580 1.65 bouyer }
1581 1.65 bouyer IF_ENQUEUE(&sc->sc_if.if_snd, m);
1582 1.65 bouyer softint_schedule(sc->sc_softintr);
1583 1.1 thorpej
1584 1.1 thorpej return (NULL);
1585 1.1 thorpej }
1586 1.1 thorpej
1587 1.1 thorpej /*
1588 1.1 thorpej * bridge_broadcast:
1589 1.1 thorpej *
1590 1.1 thorpej * Send a frame to all interfaces that are members of
1591 1.1 thorpej * the bridge, except for the one on which the packet
1592 1.1 thorpej * arrived.
1593 1.1 thorpej */
1594 1.33 thorpej static void
1595 1.1 thorpej bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
1596 1.1 thorpej struct mbuf *m)
1597 1.1 thorpej {
1598 1.1 thorpej struct bridge_iflist *bif;
1599 1.1 thorpej struct mbuf *mc;
1600 1.1 thorpej struct ifnet *dst_if;
1601 1.1 thorpej int used = 0;
1602 1.1 thorpej
1603 1.1 thorpej LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1604 1.1 thorpej dst_if = bif->bif_ifp;
1605 1.1 thorpej if (dst_if == src_if)
1606 1.1 thorpej continue;
1607 1.1 thorpej
1608 1.1 thorpej if (bif->bif_flags & IFBIF_STP) {
1609 1.1 thorpej switch (bif->bif_state) {
1610 1.1 thorpej case BSTP_IFSTATE_BLOCKING:
1611 1.1 thorpej case BSTP_IFSTATE_DISABLED:
1612 1.1 thorpej continue;
1613 1.1 thorpej }
1614 1.1 thorpej }
1615 1.1 thorpej
1616 1.1 thorpej if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
1617 1.1 thorpej (m->m_flags & (M_BCAST|M_MCAST)) == 0)
1618 1.1 thorpej continue;
1619 1.1 thorpej
1620 1.1 thorpej if ((dst_if->if_flags & IFF_RUNNING) == 0)
1621 1.1 thorpej continue;
1622 1.1 thorpej
1623 1.1 thorpej if (LIST_NEXT(bif, bif_next) == NULL) {
1624 1.1 thorpej mc = m;
1625 1.1 thorpej used = 1;
1626 1.1 thorpej } else {
1627 1.1 thorpej mc = m_copym(m, 0, M_COPYALL, M_DONTWAIT);
1628 1.1 thorpej if (mc == NULL) {
1629 1.1 thorpej sc->sc_if.if_oerrors++;
1630 1.1 thorpej continue;
1631 1.1 thorpej }
1632 1.1 thorpej }
1633 1.1 thorpej
1634 1.18 jdc bridge_enqueue(sc, dst_if, mc, 1);
1635 1.1 thorpej }
1636 1.1 thorpej if (used == 0)
1637 1.1 thorpej m_freem(m);
1638 1.1 thorpej }
1639 1.1 thorpej
1640 1.1 thorpej /*
1641 1.1 thorpej * bridge_rtupdate:
1642 1.1 thorpej *
1643 1.1 thorpej * Add a bridge routing entry.
1644 1.1 thorpej */
1645 1.33 thorpej static int
1646 1.1 thorpej bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
1647 1.1 thorpej struct ifnet *dst_if, int setflags, uint8_t flags)
1648 1.1 thorpej {
1649 1.1 thorpej struct bridge_rtnode *brt;
1650 1.41 tls int error, s;
1651 1.1 thorpej
1652 1.1 thorpej /*
1653 1.1 thorpej * A route for this destination might already exist. If so,
1654 1.1 thorpej * update it, otherwise create a new one.
1655 1.1 thorpej */
1656 1.1 thorpej if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
1657 1.1 thorpej if (sc->sc_brtcnt >= sc->sc_brtmax)
1658 1.1 thorpej return (ENOSPC);
1659 1.1 thorpej
1660 1.1 thorpej /*
1661 1.1 thorpej * Allocate a new bridge forwarding node, and
1662 1.1 thorpej * initialize the expiration time and Ethernet
1663 1.1 thorpej * address.
1664 1.1 thorpej */
1665 1.41 tls s = splnet();
1666 1.1 thorpej brt = pool_get(&bridge_rtnode_pool, PR_NOWAIT);
1667 1.41 tls splx(s);
1668 1.1 thorpej if (brt == NULL)
1669 1.1 thorpej return (ENOMEM);
1670 1.1 thorpej
1671 1.1 thorpej memset(brt, 0, sizeof(*brt));
1672 1.39 kardel brt->brt_expire = time_uptime + sc->sc_brttimeout;
1673 1.1 thorpej brt->brt_flags = IFBAF_DYNAMIC;
1674 1.1 thorpej memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
1675 1.1 thorpej
1676 1.1 thorpej if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
1677 1.41 tls s = splnet();
1678 1.1 thorpej pool_put(&bridge_rtnode_pool, brt);
1679 1.41 tls splx(s);
1680 1.1 thorpej return (error);
1681 1.1 thorpej }
1682 1.1 thorpej }
1683 1.1 thorpej
1684 1.1 thorpej brt->brt_ifp = dst_if;
1685 1.1 thorpej if (setflags) {
1686 1.1 thorpej brt->brt_flags = flags;
1687 1.39 kardel if (flags & IFBAF_STATIC)
1688 1.39 kardel brt->brt_expire = 0;
1689 1.39 kardel else
1690 1.39 kardel brt->brt_expire = time_uptime + sc->sc_brttimeout;
1691 1.1 thorpej }
1692 1.1 thorpej
1693 1.1 thorpej return (0);
1694 1.1 thorpej }
1695 1.1 thorpej
1696 1.1 thorpej /*
1697 1.1 thorpej * bridge_rtlookup:
1698 1.1 thorpej *
1699 1.1 thorpej * Lookup the destination interface for an address.
1700 1.1 thorpej */
1701 1.33 thorpej static struct ifnet *
1702 1.1 thorpej bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
1703 1.1 thorpej {
1704 1.1 thorpej struct bridge_rtnode *brt;
1705 1.1 thorpej
1706 1.1 thorpej if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
1707 1.1 thorpej return (NULL);
1708 1.1 thorpej
1709 1.1 thorpej return (brt->brt_ifp);
1710 1.1 thorpej }
1711 1.1 thorpej
1712 1.1 thorpej /*
1713 1.1 thorpej * bridge_rttrim:
1714 1.1 thorpej *
1715 1.1 thorpej * Trim the routine table so that we have a number
1716 1.1 thorpej * of routing entries less than or equal to the
1717 1.1 thorpej * maximum number.
1718 1.1 thorpej */
1719 1.33 thorpej static void
1720 1.1 thorpej bridge_rttrim(struct bridge_softc *sc)
1721 1.1 thorpej {
1722 1.1 thorpej struct bridge_rtnode *brt, *nbrt;
1723 1.1 thorpej
1724 1.1 thorpej /* Make sure we actually need to do this. */
1725 1.1 thorpej if (sc->sc_brtcnt <= sc->sc_brtmax)
1726 1.1 thorpej return;
1727 1.1 thorpej
1728 1.1 thorpej /* Force an aging cycle; this might trim enough addresses. */
1729 1.1 thorpej bridge_rtage(sc);
1730 1.1 thorpej if (sc->sc_brtcnt <= sc->sc_brtmax)
1731 1.1 thorpej return;
1732 1.1 thorpej
1733 1.1 thorpej for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
1734 1.1 thorpej nbrt = LIST_NEXT(brt, brt_list);
1735 1.1 thorpej if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
1736 1.1 thorpej bridge_rtnode_destroy(sc, brt);
1737 1.1 thorpej if (sc->sc_brtcnt <= sc->sc_brtmax)
1738 1.1 thorpej return;
1739 1.1 thorpej }
1740 1.1 thorpej }
1741 1.1 thorpej }
1742 1.1 thorpej
1743 1.1 thorpej /*
1744 1.1 thorpej * bridge_timer:
1745 1.1 thorpej *
1746 1.1 thorpej * Aging timer for the bridge.
1747 1.1 thorpej */
1748 1.33 thorpej static void
1749 1.1 thorpej bridge_timer(void *arg)
1750 1.1 thorpej {
1751 1.1 thorpej struct bridge_softc *sc = arg;
1752 1.1 thorpej int s;
1753 1.1 thorpej
1754 1.1 thorpej s = splnet();
1755 1.1 thorpej bridge_rtage(sc);
1756 1.1 thorpej splx(s);
1757 1.1 thorpej
1758 1.1 thorpej if (sc->sc_if.if_flags & IFF_RUNNING)
1759 1.1 thorpej callout_reset(&sc->sc_brcallout,
1760 1.1 thorpej bridge_rtable_prune_period * hz, bridge_timer, sc);
1761 1.1 thorpej }
1762 1.1 thorpej
1763 1.1 thorpej /*
1764 1.1 thorpej * bridge_rtage:
1765 1.1 thorpej *
1766 1.1 thorpej * Perform an aging cycle.
1767 1.1 thorpej */
1768 1.33 thorpej static void
1769 1.1 thorpej bridge_rtage(struct bridge_softc *sc)
1770 1.1 thorpej {
1771 1.1 thorpej struct bridge_rtnode *brt, *nbrt;
1772 1.1 thorpej
1773 1.1 thorpej for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
1774 1.1 thorpej nbrt = LIST_NEXT(brt, brt_list);
1775 1.1 thorpej if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
1776 1.39 kardel if (time_uptime >= brt->brt_expire)
1777 1.1 thorpej bridge_rtnode_destroy(sc, brt);
1778 1.1 thorpej }
1779 1.1 thorpej }
1780 1.1 thorpej }
1781 1.1 thorpej
1782 1.1 thorpej /*
1783 1.1 thorpej * bridge_rtflush:
1784 1.1 thorpej *
1785 1.1 thorpej * Remove all dynamic addresses from the bridge.
1786 1.1 thorpej */
1787 1.33 thorpej static void
1788 1.1 thorpej bridge_rtflush(struct bridge_softc *sc, int full)
1789 1.1 thorpej {
1790 1.1 thorpej struct bridge_rtnode *brt, *nbrt;
1791 1.1 thorpej
1792 1.1 thorpej for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
1793 1.1 thorpej nbrt = LIST_NEXT(brt, brt_list);
1794 1.1 thorpej if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
1795 1.1 thorpej bridge_rtnode_destroy(sc, brt);
1796 1.1 thorpej }
1797 1.1 thorpej }
1798 1.1 thorpej
1799 1.1 thorpej /*
1800 1.1 thorpej * bridge_rtdaddr:
1801 1.1 thorpej *
1802 1.1 thorpej * Remove an address from the table.
1803 1.1 thorpej */
1804 1.33 thorpej static int
1805 1.1 thorpej bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
1806 1.1 thorpej {
1807 1.1 thorpej struct bridge_rtnode *brt;
1808 1.1 thorpej
1809 1.1 thorpej if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
1810 1.1 thorpej return (ENOENT);
1811 1.1 thorpej
1812 1.1 thorpej bridge_rtnode_destroy(sc, brt);
1813 1.1 thorpej return (0);
1814 1.1 thorpej }
1815 1.1 thorpej
1816 1.1 thorpej /*
1817 1.1 thorpej * bridge_rtdelete:
1818 1.1 thorpej *
1819 1.1 thorpej * Delete routes to a speicifc member interface.
1820 1.1 thorpej */
1821 1.33 thorpej static void
1822 1.1 thorpej bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp)
1823 1.1 thorpej {
1824 1.1 thorpej struct bridge_rtnode *brt, *nbrt;
1825 1.1 thorpej
1826 1.1 thorpej for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
1827 1.1 thorpej nbrt = LIST_NEXT(brt, brt_list);
1828 1.1 thorpej if (brt->brt_ifp == ifp)
1829 1.1 thorpej bridge_rtnode_destroy(sc, brt);
1830 1.1 thorpej }
1831 1.1 thorpej }
1832 1.1 thorpej
1833 1.1 thorpej /*
1834 1.1 thorpej * bridge_rtable_init:
1835 1.1 thorpej *
1836 1.1 thorpej * Initialize the route table for this bridge.
1837 1.1 thorpej */
1838 1.33 thorpej static int
1839 1.1 thorpej bridge_rtable_init(struct bridge_softc *sc)
1840 1.1 thorpej {
1841 1.1 thorpej int i;
1842 1.1 thorpej
1843 1.1 thorpej sc->sc_rthash = malloc(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
1844 1.1 thorpej M_DEVBUF, M_NOWAIT);
1845 1.1 thorpej if (sc->sc_rthash == NULL)
1846 1.1 thorpej return (ENOMEM);
1847 1.1 thorpej
1848 1.1 thorpej for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
1849 1.1 thorpej LIST_INIT(&sc->sc_rthash[i]);
1850 1.1 thorpej
1851 1.12 itojun sc->sc_rthash_key = arc4random();
1852 1.1 thorpej
1853 1.1 thorpej LIST_INIT(&sc->sc_rtlist);
1854 1.1 thorpej
1855 1.1 thorpej return (0);
1856 1.1 thorpej }
1857 1.1 thorpej
1858 1.1 thorpej /*
1859 1.1 thorpej * bridge_rtable_fini:
1860 1.1 thorpej *
1861 1.1 thorpej * Deconstruct the route table for this bridge.
1862 1.1 thorpej */
1863 1.33 thorpej static void
1864 1.1 thorpej bridge_rtable_fini(struct bridge_softc *sc)
1865 1.1 thorpej {
1866 1.1 thorpej
1867 1.1 thorpej free(sc->sc_rthash, M_DEVBUF);
1868 1.1 thorpej }
1869 1.1 thorpej
1870 1.1 thorpej /*
1871 1.1 thorpej * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1872 1.1 thorpej * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1873 1.1 thorpej */
1874 1.1 thorpej #define mix(a, b, c) \
1875 1.1 thorpej do { \
1876 1.1 thorpej a -= b; a -= c; a ^= (c >> 13); \
1877 1.1 thorpej b -= c; b -= a; b ^= (a << 8); \
1878 1.1 thorpej c -= a; c -= b; c ^= (b >> 13); \
1879 1.1 thorpej a -= b; a -= c; a ^= (c >> 12); \
1880 1.1 thorpej b -= c; b -= a; b ^= (a << 16); \
1881 1.1 thorpej c -= a; c -= b; c ^= (b >> 5); \
1882 1.1 thorpej a -= b; a -= c; a ^= (c >> 3); \
1883 1.1 thorpej b -= c; b -= a; b ^= (a << 10); \
1884 1.1 thorpej c -= a; c -= b; c ^= (b >> 15); \
1885 1.1 thorpej } while (/*CONSTCOND*/0)
1886 1.1 thorpej
1887 1.34 perry static inline uint32_t
1888 1.1 thorpej bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
1889 1.1 thorpej {
1890 1.1 thorpej uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
1891 1.1 thorpej
1892 1.1 thorpej b += addr[5] << 8;
1893 1.1 thorpej b += addr[4];
1894 1.1 thorpej a += addr[3] << 24;
1895 1.1 thorpej a += addr[2] << 16;
1896 1.1 thorpej a += addr[1] << 8;
1897 1.1 thorpej a += addr[0];
1898 1.1 thorpej
1899 1.1 thorpej mix(a, b, c);
1900 1.1 thorpej
1901 1.1 thorpej return (c & BRIDGE_RTHASH_MASK);
1902 1.1 thorpej }
1903 1.1 thorpej
1904 1.1 thorpej #undef mix
1905 1.1 thorpej
1906 1.1 thorpej /*
1907 1.1 thorpej * bridge_rtnode_lookup:
1908 1.1 thorpej *
1909 1.1 thorpej * Look up a bridge route node for the specified destination.
1910 1.1 thorpej */
1911 1.33 thorpej static struct bridge_rtnode *
1912 1.1 thorpej bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
1913 1.1 thorpej {
1914 1.1 thorpej struct bridge_rtnode *brt;
1915 1.1 thorpej uint32_t hash;
1916 1.1 thorpej int dir;
1917 1.1 thorpej
1918 1.1 thorpej hash = bridge_rthash(sc, addr);
1919 1.1 thorpej LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
1920 1.1 thorpej dir = memcmp(addr, brt->brt_addr, ETHER_ADDR_LEN);
1921 1.1 thorpej if (dir == 0)
1922 1.1 thorpej return (brt);
1923 1.1 thorpej if (dir > 0)
1924 1.1 thorpej return (NULL);
1925 1.1 thorpej }
1926 1.1 thorpej
1927 1.1 thorpej return (NULL);
1928 1.1 thorpej }
1929 1.1 thorpej
1930 1.1 thorpej /*
1931 1.1 thorpej * bridge_rtnode_insert:
1932 1.1 thorpej *
1933 1.1 thorpej * Insert the specified bridge node into the route table. We
1934 1.1 thorpej * assume the entry is not already in the table.
1935 1.1 thorpej */
1936 1.33 thorpej static int
1937 1.1 thorpej bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
1938 1.1 thorpej {
1939 1.1 thorpej struct bridge_rtnode *lbrt;
1940 1.1 thorpej uint32_t hash;
1941 1.1 thorpej int dir;
1942 1.1 thorpej
1943 1.1 thorpej hash = bridge_rthash(sc, brt->brt_addr);
1944 1.1 thorpej
1945 1.1 thorpej lbrt = LIST_FIRST(&sc->sc_rthash[hash]);
1946 1.1 thorpej if (lbrt == NULL) {
1947 1.1 thorpej LIST_INSERT_HEAD(&sc->sc_rthash[hash], brt, brt_hash);
1948 1.1 thorpej goto out;
1949 1.1 thorpej }
1950 1.1 thorpej
1951 1.1 thorpej do {
1952 1.1 thorpej dir = memcmp(brt->brt_addr, lbrt->brt_addr, ETHER_ADDR_LEN);
1953 1.1 thorpej if (dir == 0)
1954 1.1 thorpej return (EEXIST);
1955 1.1 thorpej if (dir > 0) {
1956 1.1 thorpej LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
1957 1.1 thorpej goto out;
1958 1.1 thorpej }
1959 1.1 thorpej if (LIST_NEXT(lbrt, brt_hash) == NULL) {
1960 1.1 thorpej LIST_INSERT_AFTER(lbrt, brt, brt_hash);
1961 1.1 thorpej goto out;
1962 1.1 thorpej }
1963 1.1 thorpej lbrt = LIST_NEXT(lbrt, brt_hash);
1964 1.1 thorpej } while (lbrt != NULL);
1965 1.1 thorpej
1966 1.1 thorpej #ifdef DIAGNOSTIC
1967 1.1 thorpej panic("bridge_rtnode_insert: impossible");
1968 1.1 thorpej #endif
1969 1.1 thorpej
1970 1.1 thorpej out:
1971 1.1 thorpej LIST_INSERT_HEAD(&sc->sc_rtlist, brt, brt_list);
1972 1.1 thorpej sc->sc_brtcnt++;
1973 1.1 thorpej
1974 1.1 thorpej return (0);
1975 1.1 thorpej }
1976 1.1 thorpej
1977 1.1 thorpej /*
1978 1.1 thorpej * bridge_rtnode_destroy:
1979 1.1 thorpej *
1980 1.1 thorpej * Destroy a bridge rtnode.
1981 1.1 thorpej */
1982 1.33 thorpej static void
1983 1.1 thorpej bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
1984 1.1 thorpej {
1985 1.41 tls int s = splnet();
1986 1.1 thorpej
1987 1.1 thorpej LIST_REMOVE(brt, brt_hash);
1988 1.1 thorpej
1989 1.1 thorpej LIST_REMOVE(brt, brt_list);
1990 1.1 thorpej sc->sc_brtcnt--;
1991 1.1 thorpej pool_put(&bridge_rtnode_pool, brt);
1992 1.41 tls
1993 1.41 tls splx(s);
1994 1.1 thorpej }
1995 1.9 perseant
1996 1.25 christos #if defined(BRIDGE_IPF) && defined(PFIL_HOOKS)
1997 1.9 perseant extern struct pfil_head inet_pfil_hook; /* XXX */
1998 1.9 perseant extern struct pfil_head inet6_pfil_hook; /* XXX */
1999 1.9 perseant
2000 1.9 perseant /*
2001 1.9 perseant * Send bridge packets through IPF if they are one of the types IPF can deal
2002 1.9 perseant * with, or if they are ARP or REVARP. (IPF will pass ARP and REVARP without
2003 1.9 perseant * question.)
2004 1.9 perseant */
2005 1.33 thorpej static int
2006 1.45 christos bridge_ipf(void *arg, struct mbuf **mp, struct ifnet *ifp, int dir)
2007 1.9 perseant {
2008 1.22 jdc int snap, error;
2009 1.22 jdc struct ether_header *eh1, eh2;
2010 1.31 jdc struct llc llc1;
2011 1.56 matt uint16_t ether_type;
2012 1.9 perseant
2013 1.9 perseant snap = 0;
2014 1.22 jdc error = -1; /* Default error if not error == 0 */
2015 1.22 jdc eh1 = mtod(*mp, struct ether_header *);
2016 1.22 jdc ether_type = ntohs(eh1->ether_type);
2017 1.9 perseant
2018 1.9 perseant /*
2019 1.9 perseant * Check for SNAP/LLC.
2020 1.9 perseant */
2021 1.29 perry if (ether_type < ETHERMTU) {
2022 1.31 jdc struct llc *llc2 = (struct llc *)(eh1 + 1);
2023 1.29 perry
2024 1.9 perseant if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
2025 1.31 jdc llc2->llc_dsap == LLC_SNAP_LSAP &&
2026 1.31 jdc llc2->llc_ssap == LLC_SNAP_LSAP &&
2027 1.31 jdc llc2->llc_control == LLC_UI) {
2028 1.31 jdc ether_type = htons(llc2->llc_un.type_snap.ether_type);
2029 1.9 perseant snap = 1;
2030 1.9 perseant }
2031 1.29 perry }
2032 1.9 perseant
2033 1.9 perseant /*
2034 1.9 perseant * If we're trying to filter bridge traffic, don't look at anything
2035 1.9 perseant * other than IP and ARP traffic. If the filter doesn't understand
2036 1.9 perseant * IPv6, don't allow IPv6 through the bridge either. This is lame
2037 1.9 perseant * since if we really wanted, say, an AppleTalk filter, we are hosed,
2038 1.9 perseant * but of course we don't have an AppleTalk filter to begin with.
2039 1.9 perseant * (Note that since IPF doesn't understand ARP it will pass *ALL*
2040 1.9 perseant * ARP traffic.)
2041 1.9 perseant */
2042 1.9 perseant switch (ether_type) {
2043 1.9 perseant case ETHERTYPE_ARP:
2044 1.9 perseant case ETHERTYPE_REVARP:
2045 1.9 perseant return 0; /* Automatically pass */
2046 1.9 perseant case ETHERTYPE_IP:
2047 1.9 perseant # ifdef INET6
2048 1.9 perseant case ETHERTYPE_IPV6:
2049 1.9 perseant # endif /* INET6 */
2050 1.9 perseant break;
2051 1.9 perseant default:
2052 1.9 perseant goto bad;
2053 1.9 perseant }
2054 1.9 perseant
2055 1.22 jdc /* Strip off the Ethernet header and keep a copy. */
2056 1.50 christos m_copydata(*mp, 0, ETHER_HDR_LEN, (void *) &eh2);
2057 1.22 jdc m_adj(*mp, ETHER_HDR_LEN);
2058 1.22 jdc
2059 1.9 perseant /* Strip off snap header, if present */
2060 1.9 perseant if (snap) {
2061 1.50 christos m_copydata(*mp, 0, sizeof(struct llc), (void *) &llc1);
2062 1.22 jdc m_adj(*mp, sizeof(struct llc));
2063 1.19 christos }
2064 1.9 perseant
2065 1.9 perseant /*
2066 1.22 jdc * Check basic packet sanity and run IPF through pfil.
2067 1.9 perseant */
2068 1.65 bouyer KASSERT(!cpu_intr_p());
2069 1.22 jdc switch (ether_type)
2070 1.22 jdc {
2071 1.22 jdc case ETHERTYPE_IP :
2072 1.22 jdc error = (dir == PFIL_IN) ? bridge_ip_checkbasic(mp) : 0;
2073 1.22 jdc if (error == 0)
2074 1.22 jdc error = pfil_run_hooks(&inet_pfil_hook, mp, ifp, dir);
2075 1.22 jdc break;
2076 1.9 perseant # ifdef INET6
2077 1.22 jdc case ETHERTYPE_IPV6 :
2078 1.22 jdc error = (dir == PFIL_IN) ? bridge_ip6_checkbasic(mp) : 0;
2079 1.22 jdc if (error == 0)
2080 1.22 jdc error = pfil_run_hooks(&inet6_pfil_hook, mp, ifp, dir);
2081 1.22 jdc break;
2082 1.22 jdc # endif
2083 1.22 jdc default :
2084 1.22 jdc error = 0;
2085 1.22 jdc break;
2086 1.9 perseant }
2087 1.22 jdc
2088 1.22 jdc if (*mp == NULL)
2089 1.22 jdc return error;
2090 1.22 jdc if (error != 0)
2091 1.22 jdc goto bad;
2092 1.22 jdc
2093 1.22 jdc error = -1;
2094 1.9 perseant
2095 1.9 perseant /*
2096 1.9 perseant * Finally, put everything back the way it was and return
2097 1.9 perseant */
2098 1.18 jdc if (snap) {
2099 1.22 jdc M_PREPEND(*mp, sizeof(struct llc), M_DONTWAIT);
2100 1.22 jdc if (*mp == NULL)
2101 1.22 jdc return error;
2102 1.50 christos bcopy(&llc1, mtod(*mp, void *), sizeof(struct llc));
2103 1.18 jdc }
2104 1.18 jdc
2105 1.22 jdc M_PREPEND(*mp, ETHER_HDR_LEN, M_DONTWAIT);
2106 1.22 jdc if (*mp == NULL)
2107 1.22 jdc return error;
2108 1.50 christos bcopy(&eh2, mtod(*mp, void *), ETHER_HDR_LEN);
2109 1.22 jdc
2110 1.9 perseant return 0;
2111 1.9 perseant
2112 1.9 perseant bad:
2113 1.9 perseant m_freem(*mp);
2114 1.9 perseant *mp = NULL;
2115 1.9 perseant return error;
2116 1.9 perseant }
2117 1.9 perseant
2118 1.9 perseant /*
2119 1.9 perseant * Perform basic checks on header size since
2120 1.9 perseant * IPF assumes ip_input has already processed
2121 1.9 perseant * it for it. Cut-and-pasted from ip_input.c.
2122 1.9 perseant * Given how simple the IPv6 version is,
2123 1.9 perseant * does the IPv4 version really need to be
2124 1.9 perseant * this complicated?
2125 1.9 perseant *
2126 1.9 perseant * XXX Should we update ipstat here, or not?
2127 1.9 perseant * XXX Right now we update ipstat but not
2128 1.9 perseant * XXX csum_counter.
2129 1.9 perseant */
2130 1.9 perseant static int
2131 1.9 perseant bridge_ip_checkbasic(struct mbuf **mp)
2132 1.9 perseant {
2133 1.9 perseant struct mbuf *m = *mp;
2134 1.9 perseant struct ip *ip;
2135 1.9 perseant int len, hlen;
2136 1.9 perseant
2137 1.9 perseant if (*mp == NULL)
2138 1.9 perseant return -1;
2139 1.9 perseant
2140 1.50 christos if (IP_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
2141 1.9 perseant if ((m = m_copyup(m, sizeof(struct ip),
2142 1.9 perseant (max_linkhdr + 3) & ~3)) == NULL) {
2143 1.9 perseant /* XXXJRT new stat, please */
2144 1.59 thorpej ip_statinc(IP_STAT_TOOSMALL);
2145 1.9 perseant goto bad;
2146 1.9 perseant }
2147 1.9 perseant } else if (__predict_false(m->m_len < sizeof (struct ip))) {
2148 1.9 perseant if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
2149 1.59 thorpej ip_statinc(IP_STAT_TOOSMALL);
2150 1.9 perseant goto bad;
2151 1.29 perry }
2152 1.9 perseant }
2153 1.9 perseant ip = mtod(m, struct ip *);
2154 1.9 perseant if (ip == NULL) goto bad;
2155 1.9 perseant
2156 1.9 perseant if (ip->ip_v != IPVERSION) {
2157 1.59 thorpej ip_statinc(IP_STAT_BADVERS);
2158 1.9 perseant goto bad;
2159 1.9 perseant }
2160 1.9 perseant hlen = ip->ip_hl << 2;
2161 1.9 perseant if (hlen < sizeof(struct ip)) { /* minimum header length */
2162 1.59 thorpej ip_statinc(IP_STAT_BADHLEN);
2163 1.9 perseant goto bad;
2164 1.9 perseant }
2165 1.9 perseant if (hlen > m->m_len) {
2166 1.9 perseant if ((m = m_pullup(m, hlen)) == 0) {
2167 1.59 thorpej ip_statinc(IP_STAT_BADHLEN);
2168 1.9 perseant goto bad;
2169 1.9 perseant }
2170 1.9 perseant ip = mtod(m, struct ip *);
2171 1.9 perseant if (ip == NULL) goto bad;
2172 1.9 perseant }
2173 1.9 perseant
2174 1.9 perseant switch (m->m_pkthdr.csum_flags &
2175 1.9 perseant ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_IPv4) |
2176 1.9 perseant M_CSUM_IPv4_BAD)) {
2177 1.9 perseant case M_CSUM_IPv4|M_CSUM_IPv4_BAD:
2178 1.9 perseant /* INET_CSUM_COUNTER_INCR(&ip_hwcsum_bad); */
2179 1.9 perseant goto bad;
2180 1.9 perseant
2181 1.9 perseant case M_CSUM_IPv4:
2182 1.9 perseant /* Checksum was okay. */
2183 1.9 perseant /* INET_CSUM_COUNTER_INCR(&ip_hwcsum_ok); */
2184 1.9 perseant break;
2185 1.9 perseant
2186 1.9 perseant default:
2187 1.9 perseant /* Must compute it ourselves. */
2188 1.9 perseant /* INET_CSUM_COUNTER_INCR(&ip_swcsum); */
2189 1.9 perseant if (in_cksum(m, hlen) != 0)
2190 1.9 perseant goto bad;
2191 1.9 perseant break;
2192 1.9 perseant }
2193 1.9 perseant
2194 1.9 perseant /* Retrieve the packet length. */
2195 1.9 perseant len = ntohs(ip->ip_len);
2196 1.9 perseant
2197 1.9 perseant /*
2198 1.9 perseant * Check for additional length bogosity
2199 1.9 perseant */
2200 1.9 perseant if (len < hlen) {
2201 1.59 thorpej ip_statinc(IP_STAT_BADLEN);
2202 1.9 perseant goto bad;
2203 1.9 perseant }
2204 1.9 perseant
2205 1.9 perseant /*
2206 1.9 perseant * Check that the amount of data in the buffers
2207 1.9 perseant * is as at least much as the IP header would have us expect.
2208 1.9 perseant * Drop packet if shorter than we expect.
2209 1.9 perseant */
2210 1.9 perseant if (m->m_pkthdr.len < len) {
2211 1.59 thorpej ip_statinc(IP_STAT_TOOSHORT);
2212 1.9 perseant goto bad;
2213 1.9 perseant }
2214 1.9 perseant
2215 1.9 perseant /* Checks out, proceed */
2216 1.9 perseant *mp = m;
2217 1.9 perseant return 0;
2218 1.9 perseant
2219 1.9 perseant bad:
2220 1.9 perseant *mp = m;
2221 1.9 perseant return -1;
2222 1.9 perseant }
2223 1.9 perseant
2224 1.9 perseant # ifdef INET6
2225 1.9 perseant /*
2226 1.9 perseant * Same as above, but for IPv6.
2227 1.9 perseant * Cut-and-pasted from ip6_input.c.
2228 1.9 perseant * XXX Should we update ip6stat, or not?
2229 1.9 perseant */
2230 1.9 perseant static int
2231 1.9 perseant bridge_ip6_checkbasic(struct mbuf **mp)
2232 1.9 perseant {
2233 1.9 perseant struct mbuf *m = *mp;
2234 1.16 jdc struct ip6_hdr *ip6;
2235 1.9 perseant
2236 1.9 perseant /*
2237 1.9 perseant * If the IPv6 header is not aligned, slurp it up into a new
2238 1.9 perseant * mbuf with space for link headers, in the event we forward
2239 1.9 perseant * it. Otherwise, if it is aligned, make sure the entire base
2240 1.9 perseant * IPv6 header is in the first mbuf of the chain.
2241 1.9 perseant */
2242 1.50 christos if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
2243 1.9 perseant struct ifnet *inifp = m->m_pkthdr.rcvif;
2244 1.9 perseant if ((m = m_copyup(m, sizeof(struct ip6_hdr),
2245 1.9 perseant (max_linkhdr + 3) & ~3)) == NULL) {
2246 1.9 perseant /* XXXJRT new stat, please */
2247 1.61 thorpej ip6_statinc(IP6_STAT_TOOSMALL);
2248 1.9 perseant in6_ifstat_inc(inifp, ifs6_in_hdrerr);
2249 1.9 perseant goto bad;
2250 1.9 perseant }
2251 1.9 perseant } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
2252 1.9 perseant struct ifnet *inifp = m->m_pkthdr.rcvif;
2253 1.9 perseant if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
2254 1.61 thorpej ip6_statinc(IP6_STAT_TOOSMALL);
2255 1.9 perseant in6_ifstat_inc(inifp, ifs6_in_hdrerr);
2256 1.9 perseant goto bad;
2257 1.9 perseant }
2258 1.9 perseant }
2259 1.9 perseant
2260 1.9 perseant ip6 = mtod(m, struct ip6_hdr *);
2261 1.9 perseant
2262 1.9 perseant if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
2263 1.61 thorpej ip6_statinc(IP6_STAT_BADVERS);
2264 1.9 perseant in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
2265 1.9 perseant goto bad;
2266 1.9 perseant }
2267 1.9 perseant
2268 1.9 perseant /* Checks out, proceed */
2269 1.9 perseant *mp = m;
2270 1.9 perseant return 0;
2271 1.9 perseant
2272 1.9 perseant bad:
2273 1.9 perseant *mp = m;
2274 1.9 perseant return -1;
2275 1.9 perseant }
2276 1.9 perseant # endif /* INET6 */
2277 1.25 christos #endif /* BRIDGE_IPF && PFIL_HOOKS */
2278