1/* $FreeBSD: head/sys/net/if_stf.c 78701 2001-06-24 14:52:55Z ume $ */
| 1/* $FreeBSD: head/sys/net/if_stf.c 79106 2001-07-02 21:02:09Z brooks $ */
|
2/* $KAME: if_stf.c,v 1.62 2001/06/07 22:32:16 itojun Exp $ */
3
4/*
5 * Copyright (C) 2000 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * 6to4 interface, based on RFC3056.
35 *
36 * 6to4 interface is NOT capable of link-layer (I mean, IPv4) multicasting.
37 * There is no address mapping defined from IPv6 multicast address to IPv4
38 * address. Therefore, we do not have IFF_MULTICAST on the interface.
39 *
40 * Due to the lack of address mapping for link-local addresses, we cannot
41 * throw packets toward link-local addresses (fe80::x). Also, we cannot throw
42 * packets to link-local multicast addresses (ff02::x).
43 *
44 * Here are interesting symptoms due to the lack of link-local address:
45 *
46 * Unicast routing exchange:
47 * - RIPng: Impossible. Uses link-local multicast packet toward ff02::9,
48 * and link-local addresses as nexthop.
49 * - OSPFv6: Impossible. OSPFv6 assumes that there's link-local address
50 * assigned to the link, and makes use of them. Also, HELLO packets use
51 * link-local multicast addresses (ff02::5 and ff02::6).
52 * - BGP4+: Maybe. You can only use global address as nexthop, and global
53 * address as TCP endpoint address.
54 *
55 * Multicast routing protocols:
56 * - PIM: Hello packet cannot be used to discover adjacent PIM routers.
57 * Adjacent PIM routers must be configured manually (is it really spec-wise
58 * correct thing to do?).
59 *
60 * ICMPv6:
61 * - Redirects cannot be used due to the lack of link-local address.
62 *
63 * stf interface does not have, and will not need, a link-local address.
64 * It seems to have no real benefit and does not help the above symptoms much.
65 * Even if we assign link-locals to interface, we cannot really
66 * use link-local unicast/multicast on top of 6to4 cloud (since there's no
67 * encapsulation defined for link-local address), and the above analysis does
68 * not change. RFC3056 does not mandate the assignment of link-local address
69 * either.
70 *
71 * 6to4 interface has security issues. Refer to
72 * http://playground.iijlab.net/i-d/draft-itojun-ipv6-transition-abuse-00.txt
73 * for details. The code tries to filter out some of malicious packets.
74 * Note that there is no way to be 100% secure.
75 */
76
77#include "opt_inet.h"
78#include "opt_inet6.h"
79
80#include <sys/param.h>
81#include <sys/systm.h>
82#include <sys/socket.h>
83#include <sys/sockio.h>
84#include <sys/mbuf.h>
85#include <sys/errno.h>
86#include <sys/protosw.h>
87#include <sys/kernel.h>
88#include <machine/cpu.h>
89
90#include <sys/malloc.h>
91
92#include <net/if.h>
93#include <net/route.h>
94#include <net/netisr.h>
95#include <net/if_types.h>
96#include <net/if_stf.h>
97
98#include <netinet/in.h>
99#include <netinet/in_systm.h>
100#include <netinet/ip.h>
| 2/* $KAME: if_stf.c,v 1.62 2001/06/07 22:32:16 itojun Exp $ */
3
4/*
5 * Copyright (C) 2000 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * 6to4 interface, based on RFC3056.
35 *
36 * 6to4 interface is NOT capable of link-layer (I mean, IPv4) multicasting.
37 * There is no address mapping defined from IPv6 multicast address to IPv4
38 * address. Therefore, we do not have IFF_MULTICAST on the interface.
39 *
40 * Due to the lack of address mapping for link-local addresses, we cannot
41 * throw packets toward link-local addresses (fe80::x). Also, we cannot throw
42 * packets to link-local multicast addresses (ff02::x).
43 *
44 * Here are interesting symptoms due to the lack of link-local address:
45 *
46 * Unicast routing exchange:
47 * - RIPng: Impossible. Uses link-local multicast packet toward ff02::9,
48 * and link-local addresses as nexthop.
49 * - OSPFv6: Impossible. OSPFv6 assumes that there's link-local address
50 * assigned to the link, and makes use of them. Also, HELLO packets use
51 * link-local multicast addresses (ff02::5 and ff02::6).
52 * - BGP4+: Maybe. You can only use global address as nexthop, and global
53 * address as TCP endpoint address.
54 *
55 * Multicast routing protocols:
56 * - PIM: Hello packet cannot be used to discover adjacent PIM routers.
57 * Adjacent PIM routers must be configured manually (is it really spec-wise
58 * correct thing to do?).
59 *
60 * ICMPv6:
61 * - Redirects cannot be used due to the lack of link-local address.
62 *
63 * stf interface does not have, and will not need, a link-local address.
64 * It seems to have no real benefit and does not help the above symptoms much.
65 * Even if we assign link-locals to interface, we cannot really
66 * use link-local unicast/multicast on top of 6to4 cloud (since there's no
67 * encapsulation defined for link-local address), and the above analysis does
68 * not change. RFC3056 does not mandate the assignment of link-local address
69 * either.
70 *
71 * 6to4 interface has security issues. Refer to
72 * http://playground.iijlab.net/i-d/draft-itojun-ipv6-transition-abuse-00.txt
73 * for details. The code tries to filter out some of malicious packets.
74 * Note that there is no way to be 100% secure.
75 */
76
77#include "opt_inet.h"
78#include "opt_inet6.h"
79
80#include <sys/param.h>
81#include <sys/systm.h>
82#include <sys/socket.h>
83#include <sys/sockio.h>
84#include <sys/mbuf.h>
85#include <sys/errno.h>
86#include <sys/protosw.h>
87#include <sys/kernel.h>
88#include <machine/cpu.h>
89
90#include <sys/malloc.h>
91
92#include <net/if.h>
93#include <net/route.h>
94#include <net/netisr.h>
95#include <net/if_types.h>
96#include <net/if_stf.h>
97
98#include <netinet/in.h>
99#include <netinet/in_systm.h>
100#include <netinet/ip.h>
|
| 101#include <netinet/ipprotosw.h>
|
101#include <netinet/ip_var.h>
102#include <netinet/in_var.h>
103
104#include <netinet/ip6.h>
105#include <netinet6/ip6_var.h>
| 102#include <netinet/ip_var.h>
103#include <netinet/in_var.h>
104
105#include <netinet/ip6.h>
106#include <netinet6/ip6_var.h>
|
106#include <netinet6/in6_gif.h>
| |
107#include <netinet6/in6_var.h>
108#include <netinet/ip_ecn.h>
109
110#include <netinet/ip_encap.h>
111
112#include <machine/stdarg.h>
113
114#include <net/net_osdep.h>
115
| 107#include <netinet6/in6_var.h>
108#include <netinet/ip_ecn.h>
109
110#include <netinet/ip_encap.h>
111
112#include <machine/stdarg.h>
113
114#include <net/net_osdep.h>
115
|
116#include "bpf.h"
117#define NBPFILTER NBPF
118#include "stf.h"
119#include "gif.h" /*XXX*/
120
121#if NBPFILTER > 0
| |
122#include <net/bpf.h>
| 116#include <net/bpf.h>
|
123#endif
| |
124
| 117
|
125#if NGIF > 0
126#include <net/if_gif.h>
127#endif
128
129#if NSTF > 0
130#if NSTF != 1
131# error only single stf interface allowed
132#endif
133
| |
134#define IN6_IS_ADDR_6TO4(x) (ntohs((x)->s6_addr16[0]) == 0x2002)
135#define GET_V4(x) ((struct in_addr *)(&(x)->s6_addr16[1]))
136
137struct stf_softc {
138 struct ifnet sc_if; /* common area */
139 union {
140 struct route __sc_ro4;
141 struct route_in6 __sc_ro6; /* just for safety */
142 } __sc_ro46;
143#define sc_ro __sc_ro46.__sc_ro4
144 const struct encaptab *encap_cookie;
145};
146
147static struct stf_softc *stf;
| 118#define IN6_IS_ADDR_6TO4(x) (ntohs((x)->s6_addr16[0]) == 0x2002)
119#define GET_V4(x) ((struct in_addr *)(&(x)->s6_addr16[1]))
120
121struct stf_softc {
122 struct ifnet sc_if; /* common area */
123 union {
124 struct route __sc_ro4;
125 struct route_in6 __sc_ro6; /* just for safety */
126 } __sc_ro46;
127#define sc_ro __sc_ro46.__sc_ro4
128 const struct encaptab *encap_cookie;
129};
130
131static struct stf_softc *stf;
|
148static int nstf;
| |
149
| 132
|
150#if NGIF > 0
151extern int ip_gif_ttl; /*XXX*/
152#else
153static int ip_gif_ttl = 40; /*XXX*/
154#endif
| 133static MALLOC_DEFINE(M_STF, "stf", "6to4 Tunnel Interface");
134static int ip_stf_ttl = 40;
|
155
| 135
|
156extern struct protosw in_stf_protosw;
| 136extern struct domain inetdomain;
137struct ipprotosw in_stf_protosw =
138{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
139 in_stf_input, rip_output, 0, rip_ctloutput,
140 0,
141 0, 0, 0, 0,
142 &rip_usrreqs
143};
|
157
| 144
|
158void stfattach __P((void *));
| 145static int stfmodevent __P((module_t, int, void *));
|
159static int stf_encapcheck __P((const struct mbuf *, int, int, void *));
160static struct in6_ifaddr *stf_getsrcifa6 __P((struct ifnet *));
161static int stf_output __P((struct ifnet *, struct mbuf *, struct sockaddr *,
162 struct rtentry *));
163static int stf_checkaddr4 __P((struct stf_softc *, struct in_addr *,
164 struct ifnet *));
165static int stf_checkaddr6 __P((struct stf_softc *, struct in6_addr *,
166 struct ifnet *));
167static void stf_rtrequest __P((int, struct rtentry *, struct sockaddr *));
168static int stf_ioctl __P((struct ifnet *, u_long, caddr_t));
169
| 146static int stf_encapcheck __P((const struct mbuf *, int, int, void *));
147static struct in6_ifaddr *stf_getsrcifa6 __P((struct ifnet *));
148static int stf_output __P((struct ifnet *, struct mbuf *, struct sockaddr *,
149 struct rtentry *));
150static int stf_checkaddr4 __P((struct stf_softc *, struct in_addr *,
151 struct ifnet *));
152static int stf_checkaddr6 __P((struct stf_softc *, struct in6_addr *,
153 struct ifnet *));
154static void stf_rtrequest __P((int, struct rtentry *, struct sockaddr *));
155static int stf_ioctl __P((struct ifnet *, u_long, caddr_t));
156
|
170void
171stfattach(dummy)
172 void *dummy;
| 157static int
158stfmodevent(mod, type, data)
159 module_t mod;
160 int type;
161 void *data;
|
173{
174 struct stf_softc *sc;
| 162{
163 struct stf_softc *sc;
|
175 int i;
| 164 int err;
|
176 const struct encaptab *p;
177
| 165 const struct encaptab *p;
166
|
178 nstf = NSTF;
179 stf = malloc(nstf * sizeof(struct stf_softc), M_DEVBUF, M_WAITOK);
180 bzero(stf, nstf * sizeof(struct stf_softc));
181 sc = stf;
| 167 switch (type) {
168 case MOD_LOAD:
169 stf = malloc(sizeof(struct stf_softc), M_STF, M_WAITOK);
170 bzero(stf, sizeof(struct stf_softc));
171 sc = stf;
|
182
| 172
|
183 /* XXX just in case... */
184 for (i = 0; i < nstf; i++) {
185 sc = &stf[i];
| |
186 bzero(sc, sizeof(*sc));
187 sc->sc_if.if_name = "stf";
| 173 bzero(sc, sizeof(*sc));
174 sc->sc_if.if_name = "stf";
|
188 sc->sc_if.if_unit = i;
| 175 sc->sc_if.if_unit = 0;
|
189
190 p = encap_attach_func(AF_INET, IPPROTO_IPV6, stf_encapcheck,
191 &in_stf_protosw, sc);
192 if (p == NULL) {
193 printf("%s: attach failed\n", if_name(&sc->sc_if));
| 176
177 p = encap_attach_func(AF_INET, IPPROTO_IPV6, stf_encapcheck,
178 &in_stf_protosw, sc);
179 if (p == NULL) {
180 printf("%s: attach failed\n", if_name(&sc->sc_if));
|
194 continue;
| 181 return (ENOMEM);
|
195 }
196 sc->encap_cookie = p;
197
198 sc->sc_if.if_mtu = IPV6_MMTU;
199 sc->sc_if.if_flags = 0;
200 sc->sc_if.if_ioctl = stf_ioctl;
201 sc->sc_if.if_output = stf_output;
202 sc->sc_if.if_type = IFT_STF;
203#if 0
204 /* turn off ingress filter */
205 sc->sc_if.if_flags |= IFF_LINK2;
206#endif
207 sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
208 if_attach(&sc->sc_if);
| 182 }
183 sc->encap_cookie = p;
184
185 sc->sc_if.if_mtu = IPV6_MMTU;
186 sc->sc_if.if_flags = 0;
187 sc->sc_if.if_ioctl = stf_ioctl;
188 sc->sc_if.if_output = stf_output;
189 sc->sc_if.if_type = IFT_STF;
190#if 0
191 /* turn off ingress filter */
192 sc->sc_if.if_flags |= IFF_LINK2;
193#endif
194 sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
195 if_attach(&sc->sc_if);
|
209#if NBPFILTER > 0
| |
210#ifdef HAVE_OLD_BPF
211 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
212#else
213 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
214#endif
| 196#ifdef HAVE_OLD_BPF
197 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
198#else
199 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
200#endif
|
215#endif
| 201 break;
202 case MOD_UNLOAD:
203 sc = stf;
204 bpfdetach(&sc->sc_if);
205 if_detach(&sc->sc_if);
206 err = encap_detach(sc->encap_cookie);
207 KASSERT(err == 0, ("Unexpected error detaching encap_cookie"));
208 free(sc, M_STF);
209 break;
|
216 }
| 210 }
|
| 211
212 return (0);
|
217}
218
| 213}
214
|
219PSEUDO_SET(stfattach, if_stf);
| 215static moduledata_t stf_mod = {
216 "if_stf",
217 stfmodevent,
218 0
219};
|
220
| 220
|
| 221DECLARE_MODULE(if_stf, stf_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
222
|
221static int
222stf_encapcheck(m, off, proto, arg)
223 const struct mbuf *m;
224 int off;
225 int proto;
226 void *arg;
227{
228 struct ip ip;
229 struct in6_ifaddr *ia6;
230 struct stf_softc *sc;
231 struct in_addr a, b;
232
233 sc = (struct stf_softc *)arg;
234 if (sc == NULL)
235 return 0;
236
237 if ((sc->sc_if.if_flags & IFF_UP) == 0)
238 return 0;
239
240 /* IFF_LINK0 means "no decapsulation" */
241 if ((sc->sc_if.if_flags & IFF_LINK0) != 0)
242 return 0;
243
244 if (proto != IPPROTO_IPV6)
245 return 0;
246
247 /* LINTED const cast */
248 m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip);
249
250 if (ip.ip_v != 4)
251 return 0;
252
253 ia6 = stf_getsrcifa6(&sc->sc_if);
254 if (ia6 == NULL)
255 return 0;
256
257 /*
258 * check if IPv4 dst matches the IPv4 address derived from the
259 * local 6to4 address.
260 * success on: dst = 10.1.1.1, ia6->ia_addr = 2002:0a01:0101:...
261 */
262 if (bcmp(GET_V4(&ia6->ia_addr.sin6_addr), &ip.ip_dst,
263 sizeof(ip.ip_dst)) != 0)
264 return 0;
265
266 /*
267 * check if IPv4 src matches the IPv4 address derived from the
268 * local 6to4 address masked by prefixmask.
269 * success on: src = 10.1.1.1, ia6->ia_addr = 2002:0a00:.../24
270 * fail on: src = 10.1.1.1, ia6->ia_addr = 2002:0b00:.../24
271 */
272 bzero(&a, sizeof(a));
273 a.s_addr = GET_V4(&ia6->ia_addr.sin6_addr)->s_addr;
274 a.s_addr &= GET_V4(&ia6->ia_prefixmask.sin6_addr)->s_addr;
275 b = ip.ip_src;
276 b.s_addr &= GET_V4(&ia6->ia_prefixmask.sin6_addr)->s_addr;
277 if (a.s_addr != b.s_addr)
278 return 0;
279
280 /* stf interface makes single side match only */
281 return 32;
282}
283
284static struct in6_ifaddr *
285stf_getsrcifa6(ifp)
286 struct ifnet *ifp;
287{
288 struct ifaddr *ia;
289 struct in_ifaddr *ia4;
290 struct sockaddr_in6 *sin6;
291 struct in_addr in;
292
293 for (ia = TAILQ_FIRST(&ifp->if_addrlist);
294 ia;
295 ia = TAILQ_NEXT(ia, ifa_list))
296 {
297 if (ia->ifa_addr == NULL)
298 continue;
299 if (ia->ifa_addr->sa_family != AF_INET6)
300 continue;
301 sin6 = (struct sockaddr_in6 *)ia->ifa_addr;
302 if (!IN6_IS_ADDR_6TO4(&sin6->sin6_addr))
303 continue;
304
305 bcopy(GET_V4(&sin6->sin6_addr), &in, sizeof(in));
306 for (ia4 = TAILQ_FIRST(&in_ifaddrhead);
307 ia4;
308 ia4 = TAILQ_NEXT(ia4, ia_link))
309 {
310 if (ia4->ia_addr.sin_addr.s_addr == in.s_addr)
311 break;
312 }
313 if (ia4 == NULL)
314 continue;
315
316 return (struct in6_ifaddr *)ia;
317 }
318
319 return NULL;
320}
321
322static int
323stf_output(ifp, m, dst, rt)
324 struct ifnet *ifp;
325 struct mbuf *m;
326 struct sockaddr *dst;
327 struct rtentry *rt;
328{
329 struct stf_softc *sc;
330 struct sockaddr_in6 *dst6;
331 struct in_addr *in4;
332 struct sockaddr_in *dst4;
333 u_int8_t tos;
334 struct ip *ip;
335 struct ip6_hdr *ip6;
336 struct in6_ifaddr *ia6;
337
338 sc = (struct stf_softc*)ifp;
339 dst6 = (struct sockaddr_in6 *)dst;
340
341 /* just in case */
342 if ((ifp->if_flags & IFF_UP) == 0) {
343 m_freem(m);
344 return ENETDOWN;
345 }
346
347 /*
348 * If we don't have an ip4 address that match my inner ip6 address,
349 * we shouldn't generate output. Without this check, we'll end up
350 * using wrong IPv4 source.
351 */
352 ia6 = stf_getsrcifa6(ifp);
353 if (ia6 == NULL) {
354 m_freem(m);
355 return ENETDOWN;
356 }
357
358 if (m->m_len < sizeof(*ip6)) {
359 m = m_pullup(m, sizeof(*ip6));
360 if (!m)
361 return ENOBUFS;
362 }
363 ip6 = mtod(m, struct ip6_hdr *);
364 tos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
365
366 /*
367 * Pickup the right outer dst addr from the list of candidates.
368 * ip6_dst has priority as it may be able to give us shorter IPv4 hops.
369 */
370 if (IN6_IS_ADDR_6TO4(&ip6->ip6_dst))
371 in4 = GET_V4(&ip6->ip6_dst);
372 else if (IN6_IS_ADDR_6TO4(&dst6->sin6_addr))
373 in4 = GET_V4(&dst6->sin6_addr);
374 else {
375 m_freem(m);
376 return ENETUNREACH;
377 }
378
379#if NBPFILTER > 0
380 if (ifp->if_bpf) {
381 /*
382 * We need to prepend the address family as
383 * a four byte field. Cons up a dummy header
384 * to pacify bpf. This is safe because bpf
385 * will only read from the mbuf (i.e., it won't
386 * try to free it or keep a pointer a to it).
387 */
388 struct mbuf m0;
389 u_int32_t af = AF_INET6;
390
391 m0.m_next = m;
392 m0.m_len = 4;
393 m0.m_data = (char *)⁡
394
395#ifdef HAVE_OLD_BPF
396 bpf_mtap(ifp, &m0);
397#else
398 bpf_mtap(ifp->if_bpf, &m0);
399#endif
400 }
401#endif /*NBPFILTER > 0*/
402
403 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
404 if (m && m->m_len < sizeof(struct ip))
405 m = m_pullup(m, sizeof(struct ip));
406 if (m == NULL)
407 return ENOBUFS;
408 ip = mtod(m, struct ip *);
409
410 bzero(ip, sizeof(*ip));
411
412 bcopy(GET_V4(&((struct sockaddr_in6 *)&ia6->ia_addr)->sin6_addr),
413 &ip->ip_src, sizeof(ip->ip_src));
414 bcopy(in4, &ip->ip_dst, sizeof(ip->ip_dst));
415 ip->ip_p = IPPROTO_IPV6;
| 223static int
224stf_encapcheck(m, off, proto, arg)
225 const struct mbuf *m;
226 int off;
227 int proto;
228 void *arg;
229{
230 struct ip ip;
231 struct in6_ifaddr *ia6;
232 struct stf_softc *sc;
233 struct in_addr a, b;
234
235 sc = (struct stf_softc *)arg;
236 if (sc == NULL)
237 return 0;
238
239 if ((sc->sc_if.if_flags & IFF_UP) == 0)
240 return 0;
241
242 /* IFF_LINK0 means "no decapsulation" */
243 if ((sc->sc_if.if_flags & IFF_LINK0) != 0)
244 return 0;
245
246 if (proto != IPPROTO_IPV6)
247 return 0;
248
249 /* LINTED const cast */
250 m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip);
251
252 if (ip.ip_v != 4)
253 return 0;
254
255 ia6 = stf_getsrcifa6(&sc->sc_if);
256 if (ia6 == NULL)
257 return 0;
258
259 /*
260 * check if IPv4 dst matches the IPv4 address derived from the
261 * local 6to4 address.
262 * success on: dst = 10.1.1.1, ia6->ia_addr = 2002:0a01:0101:...
263 */
264 if (bcmp(GET_V4(&ia6->ia_addr.sin6_addr), &ip.ip_dst,
265 sizeof(ip.ip_dst)) != 0)
266 return 0;
267
268 /*
269 * check if IPv4 src matches the IPv4 address derived from the
270 * local 6to4 address masked by prefixmask.
271 * success on: src = 10.1.1.1, ia6->ia_addr = 2002:0a00:.../24
272 * fail on: src = 10.1.1.1, ia6->ia_addr = 2002:0b00:.../24
273 */
274 bzero(&a, sizeof(a));
275 a.s_addr = GET_V4(&ia6->ia_addr.sin6_addr)->s_addr;
276 a.s_addr &= GET_V4(&ia6->ia_prefixmask.sin6_addr)->s_addr;
277 b = ip.ip_src;
278 b.s_addr &= GET_V4(&ia6->ia_prefixmask.sin6_addr)->s_addr;
279 if (a.s_addr != b.s_addr)
280 return 0;
281
282 /* stf interface makes single side match only */
283 return 32;
284}
285
286static struct in6_ifaddr *
287stf_getsrcifa6(ifp)
288 struct ifnet *ifp;
289{
290 struct ifaddr *ia;
291 struct in_ifaddr *ia4;
292 struct sockaddr_in6 *sin6;
293 struct in_addr in;
294
295 for (ia = TAILQ_FIRST(&ifp->if_addrlist);
296 ia;
297 ia = TAILQ_NEXT(ia, ifa_list))
298 {
299 if (ia->ifa_addr == NULL)
300 continue;
301 if (ia->ifa_addr->sa_family != AF_INET6)
302 continue;
303 sin6 = (struct sockaddr_in6 *)ia->ifa_addr;
304 if (!IN6_IS_ADDR_6TO4(&sin6->sin6_addr))
305 continue;
306
307 bcopy(GET_V4(&sin6->sin6_addr), &in, sizeof(in));
308 for (ia4 = TAILQ_FIRST(&in_ifaddrhead);
309 ia4;
310 ia4 = TAILQ_NEXT(ia4, ia_link))
311 {
312 if (ia4->ia_addr.sin_addr.s_addr == in.s_addr)
313 break;
314 }
315 if (ia4 == NULL)
316 continue;
317
318 return (struct in6_ifaddr *)ia;
319 }
320
321 return NULL;
322}
323
324static int
325stf_output(ifp, m, dst, rt)
326 struct ifnet *ifp;
327 struct mbuf *m;
328 struct sockaddr *dst;
329 struct rtentry *rt;
330{
331 struct stf_softc *sc;
332 struct sockaddr_in6 *dst6;
333 struct in_addr *in4;
334 struct sockaddr_in *dst4;
335 u_int8_t tos;
336 struct ip *ip;
337 struct ip6_hdr *ip6;
338 struct in6_ifaddr *ia6;
339
340 sc = (struct stf_softc*)ifp;
341 dst6 = (struct sockaddr_in6 *)dst;
342
343 /* just in case */
344 if ((ifp->if_flags & IFF_UP) == 0) {
345 m_freem(m);
346 return ENETDOWN;
347 }
348
349 /*
350 * If we don't have an ip4 address that match my inner ip6 address,
351 * we shouldn't generate output. Without this check, we'll end up
352 * using wrong IPv4 source.
353 */
354 ia6 = stf_getsrcifa6(ifp);
355 if (ia6 == NULL) {
356 m_freem(m);
357 return ENETDOWN;
358 }
359
360 if (m->m_len < sizeof(*ip6)) {
361 m = m_pullup(m, sizeof(*ip6));
362 if (!m)
363 return ENOBUFS;
364 }
365 ip6 = mtod(m, struct ip6_hdr *);
366 tos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
367
368 /*
369 * Pickup the right outer dst addr from the list of candidates.
370 * ip6_dst has priority as it may be able to give us shorter IPv4 hops.
371 */
372 if (IN6_IS_ADDR_6TO4(&ip6->ip6_dst))
373 in4 = GET_V4(&ip6->ip6_dst);
374 else if (IN6_IS_ADDR_6TO4(&dst6->sin6_addr))
375 in4 = GET_V4(&dst6->sin6_addr);
376 else {
377 m_freem(m);
378 return ENETUNREACH;
379 }
380
381#if NBPFILTER > 0
382 if (ifp->if_bpf) {
383 /*
384 * We need to prepend the address family as
385 * a four byte field. Cons up a dummy header
386 * to pacify bpf. This is safe because bpf
387 * will only read from the mbuf (i.e., it won't
388 * try to free it or keep a pointer a to it).
389 */
390 struct mbuf m0;
391 u_int32_t af = AF_INET6;
392
393 m0.m_next = m;
394 m0.m_len = 4;
395 m0.m_data = (char *)⁡
396
397#ifdef HAVE_OLD_BPF
398 bpf_mtap(ifp, &m0);
399#else
400 bpf_mtap(ifp->if_bpf, &m0);
401#endif
402 }
403#endif /*NBPFILTER > 0*/
404
405 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
406 if (m && m->m_len < sizeof(struct ip))
407 m = m_pullup(m, sizeof(struct ip));
408 if (m == NULL)
409 return ENOBUFS;
410 ip = mtod(m, struct ip *);
411
412 bzero(ip, sizeof(*ip));
413
414 bcopy(GET_V4(&((struct sockaddr_in6 *)&ia6->ia_addr)->sin6_addr),
415 &ip->ip_src, sizeof(ip->ip_src));
416 bcopy(in4, &ip->ip_dst, sizeof(ip->ip_dst));
417 ip->ip_p = IPPROTO_IPV6;
|
416 ip->ip_ttl = ip_gif_ttl; /*XXX*/
| 418 ip->ip_ttl = ip_stf_ttl;
|
417 ip->ip_len = m->m_pkthdr.len; /*host order*/
418 if (ifp->if_flags & IFF_LINK1)
419 ip_ecn_ingress(ECN_ALLOWED, &ip->ip_tos, &tos);
420 else
421 ip_ecn_ingress(ECN_NOCARE, &ip->ip_tos, &tos);
422
423 dst4 = (struct sockaddr_in *)&sc->sc_ro.ro_dst;
424 if (dst4->sin_family != AF_INET ||
425 bcmp(&dst4->sin_addr, &ip->ip_dst, sizeof(ip->ip_dst)) != 0) {
426 /* cache route doesn't match */
427 dst4->sin_family = AF_INET;
428 dst4->sin_len = sizeof(struct sockaddr_in);
429 bcopy(&ip->ip_dst, &dst4->sin_addr, sizeof(dst4->sin_addr));
430 if (sc->sc_ro.ro_rt) {
431 RTFREE(sc->sc_ro.ro_rt);
432 sc->sc_ro.ro_rt = NULL;
433 }
434 }
435
436 if (sc->sc_ro.ro_rt == NULL) {
437 rtalloc(&sc->sc_ro);
438 if (sc->sc_ro.ro_rt == NULL) {
439 m_freem(m);
440 return ENETUNREACH;
441 }
442 }
443
444 return ip_output(m, NULL, &sc->sc_ro, 0, NULL);
445}
446
447static int
448stf_checkaddr4(sc, in, inifp)
449 struct stf_softc *sc;
450 struct in_addr *in;
451 struct ifnet *inifp; /* incoming interface */
452{
453 struct in_ifaddr *ia4;
454
455 /*
456 * reject packets with the following address:
457 * 224.0.0.0/4 0.0.0.0/8 127.0.0.0/8 255.0.0.0/8
458 */
459 if (IN_MULTICAST(ntohl(in->s_addr)))
460 return -1;
461 switch ((ntohl(in->s_addr) & 0xff000000) >> 24) {
462 case 0: case 127: case 255:
463 return -1;
464 }
465
466 /*
467 * reject packets with broadcast
468 */
469 for (ia4 = TAILQ_FIRST(&in_ifaddrhead);
470 ia4;
471 ia4 = TAILQ_NEXT(ia4, ia_link))
472 {
473 if ((ia4->ia_ifa.ifa_ifp->if_flags & IFF_BROADCAST) == 0)
474 continue;
475 if (in->s_addr == ia4->ia_broadaddr.sin_addr.s_addr)
476 return -1;
477 }
478
479 /*
480 * perform ingress filter
481 */
482 if (sc && (sc->sc_if.if_flags & IFF_LINK2) == 0 && inifp) {
483 struct sockaddr_in sin;
484 struct rtentry *rt;
485
486 bzero(&sin, sizeof(sin));
487 sin.sin_family = AF_INET;
488 sin.sin_len = sizeof(struct sockaddr_in);
489 sin.sin_addr = *in;
490 rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
491 if (!rt || rt->rt_ifp != inifp) {
492#if 0
493 log(LOG_WARNING, "%s: packet from 0x%x dropped "
494 "due to ingress filter\n", if_name(&sc->sc_if),
495 (u_int32_t)ntohl(sin.sin_addr.s_addr));
496#endif
497 if (rt)
498 rtfree(rt);
499 return -1;
500 }
501 rtfree(rt);
502 }
503
504 return 0;
505}
506
507static int
508stf_checkaddr6(sc, in6, inifp)
509 struct stf_softc *sc;
510 struct in6_addr *in6;
511 struct ifnet *inifp; /* incoming interface */
512{
513 /*
514 * check 6to4 addresses
515 */
516 if (IN6_IS_ADDR_6TO4(in6))
517 return stf_checkaddr4(sc, GET_V4(in6), inifp);
518
519 /*
520 * reject anything that look suspicious. the test is implemented
521 * in ip6_input too, but we check here as well to
522 * (1) reject bad packets earlier, and
523 * (2) to be safe against future ip6_input change.
524 */
525 if (IN6_IS_ADDR_V4COMPAT(in6) || IN6_IS_ADDR_V4MAPPED(in6))
526 return -1;
527
528 return 0;
529}
530
531void
532#if __STDC__
533in_stf_input(struct mbuf *m, ...)
534#else
535in_stf_input(m, va_alist)
536 struct mbuf *m;
537#endif
538{
539 int off, proto;
540 struct stf_softc *sc;
541 struct ip *ip;
542 struct ip6_hdr *ip6;
543 u_int8_t otos, itos;
544 int len, isr;
545 struct ifqueue *ifq = NULL;
546 struct ifnet *ifp;
547 va_list ap;
548
549 va_start(ap, m);
550 off = va_arg(ap, int);
551 proto = va_arg(ap, int);
552 va_end(ap);
553
554 if (proto != IPPROTO_IPV6) {
555 m_freem(m);
556 return;
557 }
558
559 ip = mtod(m, struct ip *);
560
561 sc = (struct stf_softc *)encap_getarg(m);
562
563 if (sc == NULL || (sc->sc_if.if_flags & IFF_UP) == 0) {
564 m_freem(m);
565 return;
566 }
567
568 ifp = &sc->sc_if;
569
570 /*
571 * perform sanity check against outer src/dst.
572 * for source, perform ingress filter as well.
573 */
574 if (stf_checkaddr4(sc, &ip->ip_dst, NULL) < 0 ||
575 stf_checkaddr4(sc, &ip->ip_src, m->m_pkthdr.rcvif) < 0) {
576 m_freem(m);
577 return;
578 }
579
580 otos = ip->ip_tos;
581 m_adj(m, off);
582
583 if (m->m_len < sizeof(*ip6)) {
584 m = m_pullup(m, sizeof(*ip6));
585 if (!m)
586 return;
587 }
588 ip6 = mtod(m, struct ip6_hdr *);
589
590 /*
591 * perform sanity check against inner src/dst.
592 * for source, perform ingress filter as well.
593 */
594 if (stf_checkaddr6(sc, &ip6->ip6_dst, NULL) < 0 ||
595 stf_checkaddr6(sc, &ip6->ip6_src, m->m_pkthdr.rcvif) < 0) {
596 m_freem(m);
597 return;
598 }
599
600 itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
601 if ((ifp->if_flags & IFF_LINK1) != 0)
602 ip_ecn_egress(ECN_ALLOWED, &otos, &itos);
603 else
604 ip_ecn_egress(ECN_NOCARE, &otos, &itos);
605 ip6->ip6_flow &= ~htonl(0xff << 20);
606 ip6->ip6_flow |= htonl((u_int32_t)itos << 20);
607
608 m->m_pkthdr.rcvif = ifp;
609
| 419 ip->ip_len = m->m_pkthdr.len; /*host order*/
420 if (ifp->if_flags & IFF_LINK1)
421 ip_ecn_ingress(ECN_ALLOWED, &ip->ip_tos, &tos);
422 else
423 ip_ecn_ingress(ECN_NOCARE, &ip->ip_tos, &tos);
424
425 dst4 = (struct sockaddr_in *)&sc->sc_ro.ro_dst;
426 if (dst4->sin_family != AF_INET ||
427 bcmp(&dst4->sin_addr, &ip->ip_dst, sizeof(ip->ip_dst)) != 0) {
428 /* cache route doesn't match */
429 dst4->sin_family = AF_INET;
430 dst4->sin_len = sizeof(struct sockaddr_in);
431 bcopy(&ip->ip_dst, &dst4->sin_addr, sizeof(dst4->sin_addr));
432 if (sc->sc_ro.ro_rt) {
433 RTFREE(sc->sc_ro.ro_rt);
434 sc->sc_ro.ro_rt = NULL;
435 }
436 }
437
438 if (sc->sc_ro.ro_rt == NULL) {
439 rtalloc(&sc->sc_ro);
440 if (sc->sc_ro.ro_rt == NULL) {
441 m_freem(m);
442 return ENETUNREACH;
443 }
444 }
445
446 return ip_output(m, NULL, &sc->sc_ro, 0, NULL);
447}
448
449static int
450stf_checkaddr4(sc, in, inifp)
451 struct stf_softc *sc;
452 struct in_addr *in;
453 struct ifnet *inifp; /* incoming interface */
454{
455 struct in_ifaddr *ia4;
456
457 /*
458 * reject packets with the following address:
459 * 224.0.0.0/4 0.0.0.0/8 127.0.0.0/8 255.0.0.0/8
460 */
461 if (IN_MULTICAST(ntohl(in->s_addr)))
462 return -1;
463 switch ((ntohl(in->s_addr) & 0xff000000) >> 24) {
464 case 0: case 127: case 255:
465 return -1;
466 }
467
468 /*
469 * reject packets with broadcast
470 */
471 for (ia4 = TAILQ_FIRST(&in_ifaddrhead);
472 ia4;
473 ia4 = TAILQ_NEXT(ia4, ia_link))
474 {
475 if ((ia4->ia_ifa.ifa_ifp->if_flags & IFF_BROADCAST) == 0)
476 continue;
477 if (in->s_addr == ia4->ia_broadaddr.sin_addr.s_addr)
478 return -1;
479 }
480
481 /*
482 * perform ingress filter
483 */
484 if (sc && (sc->sc_if.if_flags & IFF_LINK2) == 0 && inifp) {
485 struct sockaddr_in sin;
486 struct rtentry *rt;
487
488 bzero(&sin, sizeof(sin));
489 sin.sin_family = AF_INET;
490 sin.sin_len = sizeof(struct sockaddr_in);
491 sin.sin_addr = *in;
492 rt = rtalloc1((struct sockaddr *)&sin, 0, 0UL);
493 if (!rt || rt->rt_ifp != inifp) {
494#if 0
495 log(LOG_WARNING, "%s: packet from 0x%x dropped "
496 "due to ingress filter\n", if_name(&sc->sc_if),
497 (u_int32_t)ntohl(sin.sin_addr.s_addr));
498#endif
499 if (rt)
500 rtfree(rt);
501 return -1;
502 }
503 rtfree(rt);
504 }
505
506 return 0;
507}
508
509static int
510stf_checkaddr6(sc, in6, inifp)
511 struct stf_softc *sc;
512 struct in6_addr *in6;
513 struct ifnet *inifp; /* incoming interface */
514{
515 /*
516 * check 6to4 addresses
517 */
518 if (IN6_IS_ADDR_6TO4(in6))
519 return stf_checkaddr4(sc, GET_V4(in6), inifp);
520
521 /*
522 * reject anything that look suspicious. the test is implemented
523 * in ip6_input too, but we check here as well to
524 * (1) reject bad packets earlier, and
525 * (2) to be safe against future ip6_input change.
526 */
527 if (IN6_IS_ADDR_V4COMPAT(in6) || IN6_IS_ADDR_V4MAPPED(in6))
528 return -1;
529
530 return 0;
531}
532
533void
534#if __STDC__
535in_stf_input(struct mbuf *m, ...)
536#else
537in_stf_input(m, va_alist)
538 struct mbuf *m;
539#endif
540{
541 int off, proto;
542 struct stf_softc *sc;
543 struct ip *ip;
544 struct ip6_hdr *ip6;
545 u_int8_t otos, itos;
546 int len, isr;
547 struct ifqueue *ifq = NULL;
548 struct ifnet *ifp;
549 va_list ap;
550
551 va_start(ap, m);
552 off = va_arg(ap, int);
553 proto = va_arg(ap, int);
554 va_end(ap);
555
556 if (proto != IPPROTO_IPV6) {
557 m_freem(m);
558 return;
559 }
560
561 ip = mtod(m, struct ip *);
562
563 sc = (struct stf_softc *)encap_getarg(m);
564
565 if (sc == NULL || (sc->sc_if.if_flags & IFF_UP) == 0) {
566 m_freem(m);
567 return;
568 }
569
570 ifp = &sc->sc_if;
571
572 /*
573 * perform sanity check against outer src/dst.
574 * for source, perform ingress filter as well.
575 */
576 if (stf_checkaddr4(sc, &ip->ip_dst, NULL) < 0 ||
577 stf_checkaddr4(sc, &ip->ip_src, m->m_pkthdr.rcvif) < 0) {
578 m_freem(m);
579 return;
580 }
581
582 otos = ip->ip_tos;
583 m_adj(m, off);
584
585 if (m->m_len < sizeof(*ip6)) {
586 m = m_pullup(m, sizeof(*ip6));
587 if (!m)
588 return;
589 }
590 ip6 = mtod(m, struct ip6_hdr *);
591
592 /*
593 * perform sanity check against inner src/dst.
594 * for source, perform ingress filter as well.
595 */
596 if (stf_checkaddr6(sc, &ip6->ip6_dst, NULL) < 0 ||
597 stf_checkaddr6(sc, &ip6->ip6_src, m->m_pkthdr.rcvif) < 0) {
598 m_freem(m);
599 return;
600 }
601
602 itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff;
603 if ((ifp->if_flags & IFF_LINK1) != 0)
604 ip_ecn_egress(ECN_ALLOWED, &otos, &itos);
605 else
606 ip_ecn_egress(ECN_NOCARE, &otos, &itos);
607 ip6->ip6_flow &= ~htonl(0xff << 20);
608 ip6->ip6_flow |= htonl((u_int32_t)itos << 20);
609
610 m->m_pkthdr.rcvif = ifp;
611
|
610#if NBPFILTER > 0
| |
611 if (ifp->if_bpf) {
612 /*
613 * We need to prepend the address family as
614 * a four byte field. Cons up a dummy header
615 * to pacify bpf. This is safe because bpf
616 * will only read from the mbuf (i.e., it won't
617 * try to free it or keep a pointer a to it).
618 */
619 struct mbuf m0;
620 u_int32_t af = AF_INET6;
621
622 m0.m_next = m;
623 m0.m_len = 4;
624 m0.m_data = (char *)⁡
625
626#ifdef HAVE_OLD_BPF
627 bpf_mtap(ifp, &m0);
628#else
629 bpf_mtap(ifp->if_bpf, &m0);
630#endif
631 }
| 612 if (ifp->if_bpf) {
613 /*
614 * We need to prepend the address family as
615 * a four byte field. Cons up a dummy header
616 * to pacify bpf. This is safe because bpf
617 * will only read from the mbuf (i.e., it won't
618 * try to free it or keep a pointer a to it).
619 */
620 struct mbuf m0;
621 u_int32_t af = AF_INET6;
622
623 m0.m_next = m;
624 m0.m_len = 4;
625 m0.m_data = (char *)⁡
626
627#ifdef HAVE_OLD_BPF
628 bpf_mtap(ifp, &m0);
629#else
630 bpf_mtap(ifp->if_bpf, &m0);
631#endif
632 }
|
632#endif /*NBPFILTER > 0*/
| |
633
634 /*
635 * Put the packet to the network layer input queue according to the
636 * specified address family.
637 * See net/if_gif.c for possible issues with packet processing
638 * reorder due to extra queueing.
639 */
640 ifq = &ip6intrq;
641 isr = NETISR_IPV6;
642
643 len = m->m_pkthdr.len;
644 if (! IF_HANDOFF(ifq, m, NULL))
645 return;
646 schednetisr(isr);
647 ifp->if_ipackets++;
648 ifp->if_ibytes += len;
649}
650
651/* ARGSUSED */
652static void
653stf_rtrequest(cmd, rt, sa)
654 int cmd;
655 struct rtentry *rt;
656 struct sockaddr *sa;
657{
658
659 if (rt)
660 rt->rt_rmx.rmx_mtu = IPV6_MMTU;
661}
662
663static int
664stf_ioctl(ifp, cmd, data)
665 struct ifnet *ifp;
666 u_long cmd;
667 caddr_t data;
668{
669 struct ifaddr *ifa;
670 struct ifreq *ifr;
671 struct sockaddr_in6 *sin6;
672 int error;
673
674 error = 0;
675 switch (cmd) {
676 case SIOCSIFADDR:
677 ifa = (struct ifaddr *)data;
678 if (ifa == NULL || ifa->ifa_addr->sa_family != AF_INET6) {
679 error = EAFNOSUPPORT;
680 break;
681 }
682 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
683 if (IN6_IS_ADDR_6TO4(&sin6->sin6_addr)) {
684 ifa->ifa_rtrequest = stf_rtrequest;
685 ifp->if_flags |= IFF_UP;
686 } else
687 error = EINVAL;
688 break;
689
690 case SIOCADDMULTI:
691 case SIOCDELMULTI:
692 ifr = (struct ifreq *)data;
693 if (ifr && ifr->ifr_addr.sa_family == AF_INET6)
694 ;
695 else
696 error = EAFNOSUPPORT;
697 break;
698
699 default:
700 error = EINVAL;
701 break;
702 }
703
704 return error;
705}
| 633
634 /*
635 * Put the packet to the network layer input queue according to the
636 * specified address family.
637 * See net/if_gif.c for possible issues with packet processing
638 * reorder due to extra queueing.
639 */
640 ifq = &ip6intrq;
641 isr = NETISR_IPV6;
642
643 len = m->m_pkthdr.len;
644 if (! IF_HANDOFF(ifq, m, NULL))
645 return;
646 schednetisr(isr);
647 ifp->if_ipackets++;
648 ifp->if_ibytes += len;
649}
650
651/* ARGSUSED */
652static void
653stf_rtrequest(cmd, rt, sa)
654 int cmd;
655 struct rtentry *rt;
656 struct sockaddr *sa;
657{
658
659 if (rt)
660 rt->rt_rmx.rmx_mtu = IPV6_MMTU;
661}
662
663static int
664stf_ioctl(ifp, cmd, data)
665 struct ifnet *ifp;
666 u_long cmd;
667 caddr_t data;
668{
669 struct ifaddr *ifa;
670 struct ifreq *ifr;
671 struct sockaddr_in6 *sin6;
672 int error;
673
674 error = 0;
675 switch (cmd) {
676 case SIOCSIFADDR:
677 ifa = (struct ifaddr *)data;
678 if (ifa == NULL || ifa->ifa_addr->sa_family != AF_INET6) {
679 error = EAFNOSUPPORT;
680 break;
681 }
682 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
683 if (IN6_IS_ADDR_6TO4(&sin6->sin6_addr)) {
684 ifa->ifa_rtrequest = stf_rtrequest;
685 ifp->if_flags |= IFF_UP;
686 } else
687 error = EINVAL;
688 break;
689
690 case SIOCADDMULTI:
691 case SIOCDELMULTI:
692 ifr = (struct ifreq *)data;
693 if (ifr && ifr->ifr_addr.sa_family == AF_INET6)
694 ;
695 else
696 error = EAFNOSUPPORT;
697 break;
698
699 default:
700 error = EINVAL;
701 break;
702 }
703
704 return error;
705}
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706
707#endif /* NSTF > 0 */
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