1/*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $KAME: in6_ifattach.c,v 1.118 2001/05/24 07:44:00 itojun Exp $
30 */
31
32#include <sys/cdefs.h>
| 1/*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $KAME: in6_ifattach.c,v 1.118 2001/05/24 07:44:00 itojun Exp $
30 */
31
32#include <sys/cdefs.h>
|
33__FBSDID("$FreeBSD: head/sys/netinet6/in6_ifattach.c 250251 2013-05-04 19:16:26Z hrs $");
| 33__FBSDID("$FreeBSD: head/sys/netinet6/in6_ifattach.c 252511 2013-07-02 16:58:15Z hrs $");
|
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/malloc.h>
38#include <sys/socket.h>
39#include <sys/sockio.h>
40#include <sys/jail.h>
41#include <sys/kernel.h>
42#include <sys/proc.h>
43#include <sys/syslog.h>
44#include <sys/md5.h>
45
46#include <net/if.h>
47#include <net/if_dl.h>
48#include <net/if_types.h>
49#include <net/route.h>
50#include <net/vnet.h>
51
52#include <netinet/in.h>
53#include <netinet/in_var.h>
54#include <netinet/if_ether.h>
55#include <netinet/in_pcb.h>
56#include <netinet/ip_var.h>
57#include <netinet/udp.h>
58#include <netinet/udp_var.h>
59
60#include <netinet/ip6.h>
61#include <netinet6/ip6_var.h>
62#include <netinet6/in6_var.h>
63#include <netinet6/in6_pcb.h>
64#include <netinet6/in6_ifattach.h>
65#include <netinet6/ip6_var.h>
66#include <netinet6/nd6.h>
67#include <netinet6/mld6_var.h>
68#include <netinet6/scope6_var.h>
69
70VNET_DEFINE(unsigned long, in6_maxmtu) = 0;
71
72#ifdef IP6_AUTO_LINKLOCAL
73VNET_DEFINE(int, ip6_auto_linklocal) = IP6_AUTO_LINKLOCAL;
74#else
75VNET_DEFINE(int, ip6_auto_linklocal) = 1; /* enabled by default */
76#endif
77
78VNET_DEFINE(struct callout, in6_tmpaddrtimer_ch);
79#define V_in6_tmpaddrtimer_ch VNET(in6_tmpaddrtimer_ch)
80
81VNET_DECLARE(struct inpcbinfo, ripcbinfo);
82#define V_ripcbinfo VNET(ripcbinfo)
83
84static int get_rand_ifid(struct ifnet *, struct in6_addr *);
85static int generate_tmp_ifid(u_int8_t *, const u_int8_t *, u_int8_t *);
86static int get_ifid(struct ifnet *, struct ifnet *, struct in6_addr *);
87static int in6_ifattach_linklocal(struct ifnet *, struct ifnet *);
88static int in6_ifattach_loopback(struct ifnet *);
89static void in6_purgemaddrs(struct ifnet *);
90
91#define EUI64_GBIT 0x01
92#define EUI64_UBIT 0x02
93#define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
94#define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
95#define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
96#define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
97#define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
98
99#define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
100#define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
101
102/*
103 * Generate a last-resort interface identifier, when the machine has no
104 * IEEE802/EUI64 address sources.
105 * The goal here is to get an interface identifier that is
106 * (1) random enough and (2) does not change across reboot.
107 * We currently use MD5(hostname) for it.
108 *
109 * in6 - upper 64bits are preserved
110 */
111static int
112get_rand_ifid(struct ifnet *ifp, struct in6_addr *in6)
113{
114 MD5_CTX ctxt;
115 struct prison *pr;
116 u_int8_t digest[16];
117 int hostnamelen;
118
119 pr = curthread->td_ucred->cr_prison;
120 mtx_lock(&pr->pr_mtx);
121 hostnamelen = strlen(pr->pr_hostname);
122#if 0
123 /* we need at least several letters as seed for ifid */
124 if (hostnamelen < 3) {
125 mtx_unlock(&pr->pr_mtx);
126 return -1;
127 }
128#endif
129
130 /* generate 8 bytes of pseudo-random value. */
131 bzero(&ctxt, sizeof(ctxt));
132 MD5Init(&ctxt);
133 MD5Update(&ctxt, pr->pr_hostname, hostnamelen);
134 mtx_unlock(&pr->pr_mtx);
135 MD5Final(digest, &ctxt);
136
137 /* assumes sizeof(digest) > sizeof(ifid) */
138 bcopy(digest, &in6->s6_addr[8], 8);
139
140 /* make sure to set "u" bit to local, and "g" bit to individual. */
141 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
142 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
143
144 /* convert EUI64 into IPv6 interface identifier */
145 EUI64_TO_IFID(in6);
146
147 return 0;
148}
149
150static int
151generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
152{
153 MD5_CTX ctxt;
154 u_int8_t seed[16], digest[16], nullbuf[8];
155 u_int32_t val32;
156
157 /* If there's no history, start with a random seed. */
158 bzero(nullbuf, sizeof(nullbuf));
159 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
160 int i;
161
162 for (i = 0; i < 2; i++) {
163 val32 = arc4random();
164 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
165 }
166 } else
167 bcopy(seed0, seed, 8);
168
169 /* copy the right-most 64-bits of the given address */
170 /* XXX assumption on the size of IFID */
171 bcopy(seed1, &seed[8], 8);
172
173 if (0) { /* for debugging purposes only */
174 int i;
175
176 printf("generate_tmp_ifid: new randomized ID from: ");
177 for (i = 0; i < 16; i++)
178 printf("%02x", seed[i]);
179 printf(" ");
180 }
181
182 /* generate 16 bytes of pseudo-random value. */
183 bzero(&ctxt, sizeof(ctxt));
184 MD5Init(&ctxt);
185 MD5Update(&ctxt, seed, sizeof(seed));
186 MD5Final(digest, &ctxt);
187
188 /*
189 * RFC 3041 3.2.1. (3)
190 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
191 * left-most bit is numbered 0) to zero.
192 */
193 bcopy(digest, ret, 8);
194 ret[0] &= ~EUI64_UBIT;
195
196 /*
197 * XXX: we'd like to ensure that the generated value is not zero
198 * for simplicity. If the caclculated digest happens to be zero,
199 * use a random non-zero value as the last resort.
200 */
201 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
202 nd6log((LOG_INFO,
203 "generate_tmp_ifid: computed MD5 value is zero.\n"));
204
205 val32 = arc4random();
206 val32 = 1 + (val32 % (0xffffffff - 1));
207 }
208
209 /*
210 * RFC 3041 3.2.1. (4)
211 * Take the rightmost 64-bits of the MD5 digest and save them in
212 * stable storage as the history value to be used in the next
213 * iteration of the algorithm.
214 */
215 bcopy(&digest[8], seed0, 8);
216
217 if (0) { /* for debugging purposes only */
218 int i;
219
220 printf("to: ");
221 for (i = 0; i < 16; i++)
222 printf("%02x", digest[i]);
223 printf("\n");
224 }
225
226 return 0;
227}
228
229/*
230 * Get interface identifier for the specified interface.
231 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
232 *
233 * in6 - upper 64bits are preserved
234 */
235int
236in6_get_hw_ifid(struct ifnet *ifp, struct in6_addr *in6)
237{
238 struct ifaddr *ifa;
239 struct sockaddr_dl *sdl;
240 u_int8_t *addr;
241 size_t addrlen;
242 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
243 static u_int8_t allone[8] =
244 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
245
246 IF_ADDR_RLOCK(ifp);
247 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
248 if (ifa->ifa_addr->sa_family != AF_LINK)
249 continue;
250 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
251 if (sdl == NULL)
252 continue;
253 if (sdl->sdl_alen == 0)
254 continue;
255
256 goto found;
257 }
258 IF_ADDR_RUNLOCK(ifp);
259
260 return -1;
261
262found:
263 IF_ADDR_LOCK_ASSERT(ifp);
264 addr = LLADDR(sdl);
265 addrlen = sdl->sdl_alen;
266
267 /* get EUI64 */
268 switch (ifp->if_type) {
| 34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/malloc.h>
38#include <sys/socket.h>
39#include <sys/sockio.h>
40#include <sys/jail.h>
41#include <sys/kernel.h>
42#include <sys/proc.h>
43#include <sys/syslog.h>
44#include <sys/md5.h>
45
46#include <net/if.h>
47#include <net/if_dl.h>
48#include <net/if_types.h>
49#include <net/route.h>
50#include <net/vnet.h>
51
52#include <netinet/in.h>
53#include <netinet/in_var.h>
54#include <netinet/if_ether.h>
55#include <netinet/in_pcb.h>
56#include <netinet/ip_var.h>
57#include <netinet/udp.h>
58#include <netinet/udp_var.h>
59
60#include <netinet/ip6.h>
61#include <netinet6/ip6_var.h>
62#include <netinet6/in6_var.h>
63#include <netinet6/in6_pcb.h>
64#include <netinet6/in6_ifattach.h>
65#include <netinet6/ip6_var.h>
66#include <netinet6/nd6.h>
67#include <netinet6/mld6_var.h>
68#include <netinet6/scope6_var.h>
69
70VNET_DEFINE(unsigned long, in6_maxmtu) = 0;
71
72#ifdef IP6_AUTO_LINKLOCAL
73VNET_DEFINE(int, ip6_auto_linklocal) = IP6_AUTO_LINKLOCAL;
74#else
75VNET_DEFINE(int, ip6_auto_linklocal) = 1; /* enabled by default */
76#endif
77
78VNET_DEFINE(struct callout, in6_tmpaddrtimer_ch);
79#define V_in6_tmpaddrtimer_ch VNET(in6_tmpaddrtimer_ch)
80
81VNET_DECLARE(struct inpcbinfo, ripcbinfo);
82#define V_ripcbinfo VNET(ripcbinfo)
83
84static int get_rand_ifid(struct ifnet *, struct in6_addr *);
85static int generate_tmp_ifid(u_int8_t *, const u_int8_t *, u_int8_t *);
86static int get_ifid(struct ifnet *, struct ifnet *, struct in6_addr *);
87static int in6_ifattach_linklocal(struct ifnet *, struct ifnet *);
88static int in6_ifattach_loopback(struct ifnet *);
89static void in6_purgemaddrs(struct ifnet *);
90
91#define EUI64_GBIT 0x01
92#define EUI64_UBIT 0x02
93#define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0)
94#define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT)
95#define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6))
96#define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT)
97#define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6))
98
99#define IFID_LOCAL(in6) (!EUI64_LOCAL(in6))
100#define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6))
101
102/*
103 * Generate a last-resort interface identifier, when the machine has no
104 * IEEE802/EUI64 address sources.
105 * The goal here is to get an interface identifier that is
106 * (1) random enough and (2) does not change across reboot.
107 * We currently use MD5(hostname) for it.
108 *
109 * in6 - upper 64bits are preserved
110 */
111static int
112get_rand_ifid(struct ifnet *ifp, struct in6_addr *in6)
113{
114 MD5_CTX ctxt;
115 struct prison *pr;
116 u_int8_t digest[16];
117 int hostnamelen;
118
119 pr = curthread->td_ucred->cr_prison;
120 mtx_lock(&pr->pr_mtx);
121 hostnamelen = strlen(pr->pr_hostname);
122#if 0
123 /* we need at least several letters as seed for ifid */
124 if (hostnamelen < 3) {
125 mtx_unlock(&pr->pr_mtx);
126 return -1;
127 }
128#endif
129
130 /* generate 8 bytes of pseudo-random value. */
131 bzero(&ctxt, sizeof(ctxt));
132 MD5Init(&ctxt);
133 MD5Update(&ctxt, pr->pr_hostname, hostnamelen);
134 mtx_unlock(&pr->pr_mtx);
135 MD5Final(digest, &ctxt);
136
137 /* assumes sizeof(digest) > sizeof(ifid) */
138 bcopy(digest, &in6->s6_addr[8], 8);
139
140 /* make sure to set "u" bit to local, and "g" bit to individual. */
141 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
142 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
143
144 /* convert EUI64 into IPv6 interface identifier */
145 EUI64_TO_IFID(in6);
146
147 return 0;
148}
149
150static int
151generate_tmp_ifid(u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret)
152{
153 MD5_CTX ctxt;
154 u_int8_t seed[16], digest[16], nullbuf[8];
155 u_int32_t val32;
156
157 /* If there's no history, start with a random seed. */
158 bzero(nullbuf, sizeof(nullbuf));
159 if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
160 int i;
161
162 for (i = 0; i < 2; i++) {
163 val32 = arc4random();
164 bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32));
165 }
166 } else
167 bcopy(seed0, seed, 8);
168
169 /* copy the right-most 64-bits of the given address */
170 /* XXX assumption on the size of IFID */
171 bcopy(seed1, &seed[8], 8);
172
173 if (0) { /* for debugging purposes only */
174 int i;
175
176 printf("generate_tmp_ifid: new randomized ID from: ");
177 for (i = 0; i < 16; i++)
178 printf("%02x", seed[i]);
179 printf(" ");
180 }
181
182 /* generate 16 bytes of pseudo-random value. */
183 bzero(&ctxt, sizeof(ctxt));
184 MD5Init(&ctxt);
185 MD5Update(&ctxt, seed, sizeof(seed));
186 MD5Final(digest, &ctxt);
187
188 /*
189 * RFC 3041 3.2.1. (3)
190 * Take the left-most 64-bits of the MD5 digest and set bit 6 (the
191 * left-most bit is numbered 0) to zero.
192 */
193 bcopy(digest, ret, 8);
194 ret[0] &= ~EUI64_UBIT;
195
196 /*
197 * XXX: we'd like to ensure that the generated value is not zero
198 * for simplicity. If the caclculated digest happens to be zero,
199 * use a random non-zero value as the last resort.
200 */
201 if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
202 nd6log((LOG_INFO,
203 "generate_tmp_ifid: computed MD5 value is zero.\n"));
204
205 val32 = arc4random();
206 val32 = 1 + (val32 % (0xffffffff - 1));
207 }
208
209 /*
210 * RFC 3041 3.2.1. (4)
211 * Take the rightmost 64-bits of the MD5 digest and save them in
212 * stable storage as the history value to be used in the next
213 * iteration of the algorithm.
214 */
215 bcopy(&digest[8], seed0, 8);
216
217 if (0) { /* for debugging purposes only */
218 int i;
219
220 printf("to: ");
221 for (i = 0; i < 16; i++)
222 printf("%02x", digest[i]);
223 printf("\n");
224 }
225
226 return 0;
227}
228
229/*
230 * Get interface identifier for the specified interface.
231 * XXX assumes single sockaddr_dl (AF_LINK address) per an interface
232 *
233 * in6 - upper 64bits are preserved
234 */
235int
236in6_get_hw_ifid(struct ifnet *ifp, struct in6_addr *in6)
237{
238 struct ifaddr *ifa;
239 struct sockaddr_dl *sdl;
240 u_int8_t *addr;
241 size_t addrlen;
242 static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
243 static u_int8_t allone[8] =
244 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
245
246 IF_ADDR_RLOCK(ifp);
247 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
248 if (ifa->ifa_addr->sa_family != AF_LINK)
249 continue;
250 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
251 if (sdl == NULL)
252 continue;
253 if (sdl->sdl_alen == 0)
254 continue;
255
256 goto found;
257 }
258 IF_ADDR_RUNLOCK(ifp);
259
260 return -1;
261
262found:
263 IF_ADDR_LOCK_ASSERT(ifp);
264 addr = LLADDR(sdl);
265 addrlen = sdl->sdl_alen;
266
267 /* get EUI64 */
268 switch (ifp->if_type) {
|
| 269 case IFT_BRIDGE:
|
269 case IFT_ETHER:
270 case IFT_L2VLAN:
271 case IFT_FDDI:
272 case IFT_ISO88025:
273 case IFT_ATM:
274 case IFT_IEEE1394:
275#ifdef IFT_IEEE80211
276 case IFT_IEEE80211:
277#endif
278 /* IEEE802/EUI64 cases - what others? */
279 /* IEEE1394 uses 16byte length address starting with EUI64 */
280 if (addrlen > 8)
281 addrlen = 8;
282
283 /* look at IEEE802/EUI64 only */
284 if (addrlen != 8 && addrlen != 6) {
285 IF_ADDR_RUNLOCK(ifp);
286 return -1;
287 }
288
289 /*
290 * check for invalid MAC address - on bsdi, we see it a lot
291 * since wildboar configures all-zero MAC on pccard before
292 * card insertion.
293 */
294 if (bcmp(addr, allzero, addrlen) == 0) {
295 IF_ADDR_RUNLOCK(ifp);
296 return -1;
297 }
298 if (bcmp(addr, allone, addrlen) == 0) {
299 IF_ADDR_RUNLOCK(ifp);
300 return -1;
301 }
302
303 /* make EUI64 address */
304 if (addrlen == 8)
305 bcopy(addr, &in6->s6_addr[8], 8);
306 else if (addrlen == 6) {
307 in6->s6_addr[8] = addr[0];
308 in6->s6_addr[9] = addr[1];
309 in6->s6_addr[10] = addr[2];
310 in6->s6_addr[11] = 0xff;
311 in6->s6_addr[12] = 0xfe;
312 in6->s6_addr[13] = addr[3];
313 in6->s6_addr[14] = addr[4];
314 in6->s6_addr[15] = addr[5];
315 }
316 break;
317
318 case IFT_ARCNET:
319 if (addrlen != 1) {
320 IF_ADDR_RUNLOCK(ifp);
321 return -1;
322 }
323 if (!addr[0]) {
324 IF_ADDR_RUNLOCK(ifp);
325 return -1;
326 }
327
328 bzero(&in6->s6_addr[8], 8);
329 in6->s6_addr[15] = addr[0];
330
331 /*
332 * due to insufficient bitwidth, we mark it local.
333 */
334 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
335 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
336 break;
337
338 case IFT_GIF:
339#ifdef IFT_STF
340 case IFT_STF:
341#endif
342 /*
343 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
344 * however, IPv4 address is not very suitable as unique
345 * identifier source (can be renumbered).
346 * we don't do this.
347 */
348 IF_ADDR_RUNLOCK(ifp);
349 return -1;
350
351 default:
352 IF_ADDR_RUNLOCK(ifp);
353 return -1;
354 }
355
356 /* sanity check: g bit must not indicate "group" */
357 if (EUI64_GROUP(in6)) {
358 IF_ADDR_RUNLOCK(ifp);
359 return -1;
360 }
361
362 /* convert EUI64 into IPv6 interface identifier */
363 EUI64_TO_IFID(in6);
364
365 /*
366 * sanity check: ifid must not be all zero, avoid conflict with
367 * subnet router anycast
368 */
369 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
370 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
371 IF_ADDR_RUNLOCK(ifp);
372 return -1;
373 }
374
375 IF_ADDR_RUNLOCK(ifp);
376 return 0;
377}
378
379/*
380 * Get interface identifier for the specified interface. If it is not
381 * available on ifp0, borrow interface identifier from other information
382 * sources.
383 *
384 * altifp - secondary EUI64 source
385 */
386static int
387get_ifid(struct ifnet *ifp0, struct ifnet *altifp,
388 struct in6_addr *in6)
389{
390 struct ifnet *ifp;
391
392 /* first, try to get it from the interface itself */
393 if (in6_get_hw_ifid(ifp0, in6) == 0) {
394 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
395 if_name(ifp0)));
396 goto success;
397 }
398
399 /* try secondary EUI64 source. this basically is for ATM PVC */
400 if (altifp && in6_get_hw_ifid(altifp, in6) == 0) {
401 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
402 if_name(ifp0), if_name(altifp)));
403 goto success;
404 }
405
406 /* next, try to get it from some other hardware interface */
407 IFNET_RLOCK_NOSLEEP();
408 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
409 if (ifp == ifp0)
410 continue;
411 if (in6_get_hw_ifid(ifp, in6) != 0)
412 continue;
413
414 /*
415 * to borrow ifid from other interface, ifid needs to be
416 * globally unique
417 */
418 if (IFID_UNIVERSAL(in6)) {
419 nd6log((LOG_DEBUG,
420 "%s: borrow interface identifier from %s\n",
421 if_name(ifp0), if_name(ifp)));
422 IFNET_RUNLOCK_NOSLEEP();
423 goto success;
424 }
425 }
426 IFNET_RUNLOCK_NOSLEEP();
427
428 /* last resort: get from random number source */
429 if (get_rand_ifid(ifp, in6) == 0) {
430 nd6log((LOG_DEBUG,
431 "%s: interface identifier generated by random number\n",
432 if_name(ifp0)));
433 goto success;
434 }
435
436 printf("%s: failed to get interface identifier\n", if_name(ifp0));
437 return -1;
438
439success:
440 nd6log((LOG_INFO, "%s: ifid: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
441 if_name(ifp0), in6->s6_addr[8], in6->s6_addr[9], in6->s6_addr[10],
442 in6->s6_addr[11], in6->s6_addr[12], in6->s6_addr[13],
443 in6->s6_addr[14], in6->s6_addr[15]));
444 return 0;
445}
446
447/*
448 * altifp - secondary EUI64 source
449 */
450static int
451in6_ifattach_linklocal(struct ifnet *ifp, struct ifnet *altifp)
452{
453 struct in6_ifaddr *ia;
454 struct in6_aliasreq ifra;
455 struct nd_prefixctl pr0;
456 int i, error;
457
458 /*
459 * configure link-local address.
460 */
461 bzero(&ifra, sizeof(ifra));
462
463 /*
464 * in6_update_ifa() does not use ifra_name, but we accurately set it
465 * for safety.
466 */
467 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
468
469 ifra.ifra_addr.sin6_family = AF_INET6;
470 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
471 ifra.ifra_addr.sin6_addr.s6_addr32[0] = htonl(0xfe800000);
472 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
473 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
474 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
475 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
476 } else {
477 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
478 nd6log((LOG_ERR,
479 "%s: no ifid available\n", if_name(ifp)));
480 return (-1);
481 }
482 }
483 if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL))
484 return (-1);
485
486 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
487 ifra.ifra_prefixmask.sin6_family = AF_INET6;
488 ifra.ifra_prefixmask.sin6_addr = in6mask64;
489 /* link-local addresses should NEVER expire. */
490 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
491 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
492
493 /*
494 * Now call in6_update_ifa() to do a bunch of procedures to configure
495 * a link-local address. We can set the 3rd argument to NULL, because
496 * we know there's no other link-local address on the interface
497 * and therefore we are adding one (instead of updating one).
498 */
499 if ((error = in6_update_ifa(ifp, &ifra, NULL,
500 IN6_IFAUPDATE_DADDELAY)) != 0) {
501 /*
502 * XXX: When the interface does not support IPv6, this call
503 * would fail in the SIOCSIFADDR ioctl. I believe the
504 * notification is rather confusing in this case, so just
505 * suppress it. (jinmei@kame.net 20010130)
506 */
507 if (error != EAFNOSUPPORT)
508 nd6log((LOG_NOTICE, "in6_ifattach_linklocal: failed to "
509 "configure a link-local address on %s "
510 "(errno=%d)\n",
511 if_name(ifp), error));
512 return (-1);
513 }
514
515 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
516 KASSERT(ia != NULL, ("%s: ia == NULL, ifp=%p", __func__, ifp));
517
518 ifa_free(&ia->ia_ifa);
519
520 /*
521 * Make the link-local prefix (fe80::%link/64) as on-link.
522 * Since we'd like to manage prefixes separately from addresses,
523 * we make an ND6 prefix structure for the link-local prefix,
524 * and add it to the prefix list as a never-expire prefix.
525 * XXX: this change might affect some existing code base...
526 */
527 bzero(&pr0, sizeof(pr0));
528 pr0.ndpr_ifp = ifp;
529 /* this should be 64 at this moment. */
530 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
531 pr0.ndpr_prefix = ifra.ifra_addr;
532 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
533 for (i = 0; i < 4; i++) {
534 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
535 in6mask64.s6_addr32[i];
536 }
537 /*
538 * Initialize parameters. The link-local prefix must always be
539 * on-link, and its lifetimes never expire.
540 */
541 pr0.ndpr_raf_onlink = 1;
542 pr0.ndpr_raf_auto = 1; /* probably meaningless */
543 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
544 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
545 /*
546 * Since there is no other link-local addresses, nd6_prefix_lookup()
547 * probably returns NULL. However, we cannot always expect the result.
548 * For example, if we first remove the (only) existing link-local
549 * address, and then reconfigure another one, the prefix is still
550 * valid with referring to the old link-local address.
551 */
552 if (nd6_prefix_lookup(&pr0) == NULL) {
553 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
554 return (error);
555 }
556
557 return 0;
558}
559
560/*
561 * ifp - must be IFT_LOOP
562 */
563static int
564in6_ifattach_loopback(struct ifnet *ifp)
565{
566 struct in6_aliasreq ifra;
567 int error;
568
569 bzero(&ifra, sizeof(ifra));
570
571 /*
572 * in6_update_ifa() does not use ifra_name, but we accurately set it
573 * for safety.
574 */
575 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
576
577 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
578 ifra.ifra_prefixmask.sin6_family = AF_INET6;
579 ifra.ifra_prefixmask.sin6_addr = in6mask128;
580
581 /*
582 * Always initialize ia_dstaddr (= broadcast address) to loopback
583 * address. Follows IPv4 practice - see in_ifinit().
584 */
585 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
586 ifra.ifra_dstaddr.sin6_family = AF_INET6;
587 ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
588
589 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
590 ifra.ifra_addr.sin6_family = AF_INET6;
591 ifra.ifra_addr.sin6_addr = in6addr_loopback;
592
593 /* the loopback address should NEVER expire. */
594 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
595 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
596
597 /* we don't need to perform DAD on loopback interfaces. */
598 ifra.ifra_flags |= IN6_IFF_NODAD;
599
600 /* skip registration to the prefix list. XXX should be temporary. */
601 ifra.ifra_flags |= IN6_IFF_NOPFX;
602
603 /*
604 * We are sure that this is a newly assigned address, so we can set
605 * NULL to the 3rd arg.
606 */
607 if ((error = in6_update_ifa(ifp, &ifra, NULL, 0)) != 0) {
608 nd6log((LOG_ERR, "in6_ifattach_loopback: failed to configure "
609 "the loopback address on %s (errno=%d)\n",
610 if_name(ifp), error));
611 return (-1);
612 }
613
614 return 0;
615}
616
617/*
618 * compute NI group address, based on the current hostname setting.
619 * see RFC 4620.
620 *
621 * when ifp == NULL, the caller is responsible for filling scopeid.
622 *
623 * If oldmcprefix == 1, FF02:0:0:0:0:2::/96 is used for NI group address
624 * while it is FF02:0:0:0:0:2:FF00::/104 in RFC 4620.
625 */
626static int
627in6_nigroup0(struct ifnet *ifp, const char *name, int namelen,
628 struct in6_addr *in6, int oldmcprefix)
629{
630 struct prison *pr;
631 const char *p;
632 u_char *q;
633 MD5_CTX ctxt;
634 u_int8_t digest[16];
635 char l;
636 char n[64]; /* a single label must not exceed 63 chars */
637
638 /*
639 * If no name is given and namelen is -1,
640 * we try to do the hostname lookup ourselves.
641 */
642 if (!name && namelen == -1) {
643 pr = curthread->td_ucred->cr_prison;
644 mtx_lock(&pr->pr_mtx);
645 name = pr->pr_hostname;
646 namelen = strlen(name);
647 } else
648 pr = NULL;
649 if (!name || !namelen) {
650 if (pr != NULL)
651 mtx_unlock(&pr->pr_mtx);
652 return -1;
653 }
654
655 p = name;
656 while (p && *p && *p != '.' && p - name < namelen)
657 p++;
658 if (p == name || p - name > sizeof(n) - 1) {
659 if (pr != NULL)
660 mtx_unlock(&pr->pr_mtx);
661 return -1; /* label too long */
662 }
663 l = p - name;
664 strncpy(n, name, l);
665 if (pr != NULL)
666 mtx_unlock(&pr->pr_mtx);
667 n[(int)l] = '\0';
668 for (q = n; *q; q++) {
669 if ('A' <= *q && *q <= 'Z')
670 *q = *q - 'A' + 'a';
671 }
672
673 /* generate 16 bytes of pseudo-random value. */
674 bzero(&ctxt, sizeof(ctxt));
675 MD5Init(&ctxt);
676 MD5Update(&ctxt, &l, sizeof(l));
677 MD5Update(&ctxt, n, l);
678 MD5Final(digest, &ctxt);
679
680 bzero(in6, sizeof(*in6));
681 in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL;
682 in6->s6_addr8[11] = 2;
683 if (oldmcprefix == 0) {
684 in6->s6_addr8[12] = 0xff;
685 /* Copy the first 24 bits of 128-bit hash into the address. */
686 bcopy(digest, &in6->s6_addr8[13], 3);
687 } else {
688 /* Copy the first 32 bits of 128-bit hash into the address. */
689 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
690 }
691 if (in6_setscope(in6, ifp, NULL))
692 return (-1); /* XXX: should not fail */
693
694 return 0;
695}
696
697int
698in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
699 struct in6_addr *in6)
700{
701
702 return (in6_nigroup0(ifp, name, namelen, in6, 0));
703}
704
705int
706in6_nigroup_oldmcprefix(struct ifnet *ifp, const char *name, int namelen,
707 struct in6_addr *in6)
708{
709
710 return (in6_nigroup0(ifp, name, namelen, in6, 1));
711}
712
713/*
714 * XXX multiple loopback interface needs more care. for instance,
715 * nodelocal address needs to be configured onto only one of them.
716 * XXX multiple link-local address case
717 *
718 * altifp - secondary EUI64 source
719 */
720void
721in6_ifattach(struct ifnet *ifp, struct ifnet *altifp)
722{
723 struct in6_ifaddr *ia;
724 struct in6_addr in6;
725
726 /* some of the interfaces are inherently not IPv6 capable */
727 switch (ifp->if_type) {
728 case IFT_PFLOG:
729 case IFT_PFSYNC:
| 270 case IFT_ETHER:
271 case IFT_L2VLAN:
272 case IFT_FDDI:
273 case IFT_ISO88025:
274 case IFT_ATM:
275 case IFT_IEEE1394:
276#ifdef IFT_IEEE80211
277 case IFT_IEEE80211:
278#endif
279 /* IEEE802/EUI64 cases - what others? */
280 /* IEEE1394 uses 16byte length address starting with EUI64 */
281 if (addrlen > 8)
282 addrlen = 8;
283
284 /* look at IEEE802/EUI64 only */
285 if (addrlen != 8 && addrlen != 6) {
286 IF_ADDR_RUNLOCK(ifp);
287 return -1;
288 }
289
290 /*
291 * check for invalid MAC address - on bsdi, we see it a lot
292 * since wildboar configures all-zero MAC on pccard before
293 * card insertion.
294 */
295 if (bcmp(addr, allzero, addrlen) == 0) {
296 IF_ADDR_RUNLOCK(ifp);
297 return -1;
298 }
299 if (bcmp(addr, allone, addrlen) == 0) {
300 IF_ADDR_RUNLOCK(ifp);
301 return -1;
302 }
303
304 /* make EUI64 address */
305 if (addrlen == 8)
306 bcopy(addr, &in6->s6_addr[8], 8);
307 else if (addrlen == 6) {
308 in6->s6_addr[8] = addr[0];
309 in6->s6_addr[9] = addr[1];
310 in6->s6_addr[10] = addr[2];
311 in6->s6_addr[11] = 0xff;
312 in6->s6_addr[12] = 0xfe;
313 in6->s6_addr[13] = addr[3];
314 in6->s6_addr[14] = addr[4];
315 in6->s6_addr[15] = addr[5];
316 }
317 break;
318
319 case IFT_ARCNET:
320 if (addrlen != 1) {
321 IF_ADDR_RUNLOCK(ifp);
322 return -1;
323 }
324 if (!addr[0]) {
325 IF_ADDR_RUNLOCK(ifp);
326 return -1;
327 }
328
329 bzero(&in6->s6_addr[8], 8);
330 in6->s6_addr[15] = addr[0];
331
332 /*
333 * due to insufficient bitwidth, we mark it local.
334 */
335 in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */
336 in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */
337 break;
338
339 case IFT_GIF:
340#ifdef IFT_STF
341 case IFT_STF:
342#endif
343 /*
344 * RFC2893 says: "SHOULD use IPv4 address as ifid source".
345 * however, IPv4 address is not very suitable as unique
346 * identifier source (can be renumbered).
347 * we don't do this.
348 */
349 IF_ADDR_RUNLOCK(ifp);
350 return -1;
351
352 default:
353 IF_ADDR_RUNLOCK(ifp);
354 return -1;
355 }
356
357 /* sanity check: g bit must not indicate "group" */
358 if (EUI64_GROUP(in6)) {
359 IF_ADDR_RUNLOCK(ifp);
360 return -1;
361 }
362
363 /* convert EUI64 into IPv6 interface identifier */
364 EUI64_TO_IFID(in6);
365
366 /*
367 * sanity check: ifid must not be all zero, avoid conflict with
368 * subnet router anycast
369 */
370 if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 &&
371 bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
372 IF_ADDR_RUNLOCK(ifp);
373 return -1;
374 }
375
376 IF_ADDR_RUNLOCK(ifp);
377 return 0;
378}
379
380/*
381 * Get interface identifier for the specified interface. If it is not
382 * available on ifp0, borrow interface identifier from other information
383 * sources.
384 *
385 * altifp - secondary EUI64 source
386 */
387static int
388get_ifid(struct ifnet *ifp0, struct ifnet *altifp,
389 struct in6_addr *in6)
390{
391 struct ifnet *ifp;
392
393 /* first, try to get it from the interface itself */
394 if (in6_get_hw_ifid(ifp0, in6) == 0) {
395 nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
396 if_name(ifp0)));
397 goto success;
398 }
399
400 /* try secondary EUI64 source. this basically is for ATM PVC */
401 if (altifp && in6_get_hw_ifid(altifp, in6) == 0) {
402 nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
403 if_name(ifp0), if_name(altifp)));
404 goto success;
405 }
406
407 /* next, try to get it from some other hardware interface */
408 IFNET_RLOCK_NOSLEEP();
409 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
410 if (ifp == ifp0)
411 continue;
412 if (in6_get_hw_ifid(ifp, in6) != 0)
413 continue;
414
415 /*
416 * to borrow ifid from other interface, ifid needs to be
417 * globally unique
418 */
419 if (IFID_UNIVERSAL(in6)) {
420 nd6log((LOG_DEBUG,
421 "%s: borrow interface identifier from %s\n",
422 if_name(ifp0), if_name(ifp)));
423 IFNET_RUNLOCK_NOSLEEP();
424 goto success;
425 }
426 }
427 IFNET_RUNLOCK_NOSLEEP();
428
429 /* last resort: get from random number source */
430 if (get_rand_ifid(ifp, in6) == 0) {
431 nd6log((LOG_DEBUG,
432 "%s: interface identifier generated by random number\n",
433 if_name(ifp0)));
434 goto success;
435 }
436
437 printf("%s: failed to get interface identifier\n", if_name(ifp0));
438 return -1;
439
440success:
441 nd6log((LOG_INFO, "%s: ifid: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
442 if_name(ifp0), in6->s6_addr[8], in6->s6_addr[9], in6->s6_addr[10],
443 in6->s6_addr[11], in6->s6_addr[12], in6->s6_addr[13],
444 in6->s6_addr[14], in6->s6_addr[15]));
445 return 0;
446}
447
448/*
449 * altifp - secondary EUI64 source
450 */
451static int
452in6_ifattach_linklocal(struct ifnet *ifp, struct ifnet *altifp)
453{
454 struct in6_ifaddr *ia;
455 struct in6_aliasreq ifra;
456 struct nd_prefixctl pr0;
457 int i, error;
458
459 /*
460 * configure link-local address.
461 */
462 bzero(&ifra, sizeof(ifra));
463
464 /*
465 * in6_update_ifa() does not use ifra_name, but we accurately set it
466 * for safety.
467 */
468 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
469
470 ifra.ifra_addr.sin6_family = AF_INET6;
471 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
472 ifra.ifra_addr.sin6_addr.s6_addr32[0] = htonl(0xfe800000);
473 ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0;
474 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
475 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0;
476 ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1);
477 } else {
478 if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
479 nd6log((LOG_ERR,
480 "%s: no ifid available\n", if_name(ifp)));
481 return (-1);
482 }
483 }
484 if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL))
485 return (-1);
486
487 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
488 ifra.ifra_prefixmask.sin6_family = AF_INET6;
489 ifra.ifra_prefixmask.sin6_addr = in6mask64;
490 /* link-local addresses should NEVER expire. */
491 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
492 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
493
494 /*
495 * Now call in6_update_ifa() to do a bunch of procedures to configure
496 * a link-local address. We can set the 3rd argument to NULL, because
497 * we know there's no other link-local address on the interface
498 * and therefore we are adding one (instead of updating one).
499 */
500 if ((error = in6_update_ifa(ifp, &ifra, NULL,
501 IN6_IFAUPDATE_DADDELAY)) != 0) {
502 /*
503 * XXX: When the interface does not support IPv6, this call
504 * would fail in the SIOCSIFADDR ioctl. I believe the
505 * notification is rather confusing in this case, so just
506 * suppress it. (jinmei@kame.net 20010130)
507 */
508 if (error != EAFNOSUPPORT)
509 nd6log((LOG_NOTICE, "in6_ifattach_linklocal: failed to "
510 "configure a link-local address on %s "
511 "(errno=%d)\n",
512 if_name(ifp), error));
513 return (-1);
514 }
515
516 ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
517 KASSERT(ia != NULL, ("%s: ia == NULL, ifp=%p", __func__, ifp));
518
519 ifa_free(&ia->ia_ifa);
520
521 /*
522 * Make the link-local prefix (fe80::%link/64) as on-link.
523 * Since we'd like to manage prefixes separately from addresses,
524 * we make an ND6 prefix structure for the link-local prefix,
525 * and add it to the prefix list as a never-expire prefix.
526 * XXX: this change might affect some existing code base...
527 */
528 bzero(&pr0, sizeof(pr0));
529 pr0.ndpr_ifp = ifp;
530 /* this should be 64 at this moment. */
531 pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL);
532 pr0.ndpr_prefix = ifra.ifra_addr;
533 /* apply the mask for safety. (nd6_prelist_add will apply it again) */
534 for (i = 0; i < 4; i++) {
535 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
536 in6mask64.s6_addr32[i];
537 }
538 /*
539 * Initialize parameters. The link-local prefix must always be
540 * on-link, and its lifetimes never expire.
541 */
542 pr0.ndpr_raf_onlink = 1;
543 pr0.ndpr_raf_auto = 1; /* probably meaningless */
544 pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
545 pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
546 /*
547 * Since there is no other link-local addresses, nd6_prefix_lookup()
548 * probably returns NULL. However, we cannot always expect the result.
549 * For example, if we first remove the (only) existing link-local
550 * address, and then reconfigure another one, the prefix is still
551 * valid with referring to the old link-local address.
552 */
553 if (nd6_prefix_lookup(&pr0) == NULL) {
554 if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0)
555 return (error);
556 }
557
558 return 0;
559}
560
561/*
562 * ifp - must be IFT_LOOP
563 */
564static int
565in6_ifattach_loopback(struct ifnet *ifp)
566{
567 struct in6_aliasreq ifra;
568 int error;
569
570 bzero(&ifra, sizeof(ifra));
571
572 /*
573 * in6_update_ifa() does not use ifra_name, but we accurately set it
574 * for safety.
575 */
576 strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
577
578 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
579 ifra.ifra_prefixmask.sin6_family = AF_INET6;
580 ifra.ifra_prefixmask.sin6_addr = in6mask128;
581
582 /*
583 * Always initialize ia_dstaddr (= broadcast address) to loopback
584 * address. Follows IPv4 practice - see in_ifinit().
585 */
586 ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6);
587 ifra.ifra_dstaddr.sin6_family = AF_INET6;
588 ifra.ifra_dstaddr.sin6_addr = in6addr_loopback;
589
590 ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
591 ifra.ifra_addr.sin6_family = AF_INET6;
592 ifra.ifra_addr.sin6_addr = in6addr_loopback;
593
594 /* the loopback address should NEVER expire. */
595 ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
596 ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
597
598 /* we don't need to perform DAD on loopback interfaces. */
599 ifra.ifra_flags |= IN6_IFF_NODAD;
600
601 /* skip registration to the prefix list. XXX should be temporary. */
602 ifra.ifra_flags |= IN6_IFF_NOPFX;
603
604 /*
605 * We are sure that this is a newly assigned address, so we can set
606 * NULL to the 3rd arg.
607 */
608 if ((error = in6_update_ifa(ifp, &ifra, NULL, 0)) != 0) {
609 nd6log((LOG_ERR, "in6_ifattach_loopback: failed to configure "
610 "the loopback address on %s (errno=%d)\n",
611 if_name(ifp), error));
612 return (-1);
613 }
614
615 return 0;
616}
617
618/*
619 * compute NI group address, based on the current hostname setting.
620 * see RFC 4620.
621 *
622 * when ifp == NULL, the caller is responsible for filling scopeid.
623 *
624 * If oldmcprefix == 1, FF02:0:0:0:0:2::/96 is used for NI group address
625 * while it is FF02:0:0:0:0:2:FF00::/104 in RFC 4620.
626 */
627static int
628in6_nigroup0(struct ifnet *ifp, const char *name, int namelen,
629 struct in6_addr *in6, int oldmcprefix)
630{
631 struct prison *pr;
632 const char *p;
633 u_char *q;
634 MD5_CTX ctxt;
635 u_int8_t digest[16];
636 char l;
637 char n[64]; /* a single label must not exceed 63 chars */
638
639 /*
640 * If no name is given and namelen is -1,
641 * we try to do the hostname lookup ourselves.
642 */
643 if (!name && namelen == -1) {
644 pr = curthread->td_ucred->cr_prison;
645 mtx_lock(&pr->pr_mtx);
646 name = pr->pr_hostname;
647 namelen = strlen(name);
648 } else
649 pr = NULL;
650 if (!name || !namelen) {
651 if (pr != NULL)
652 mtx_unlock(&pr->pr_mtx);
653 return -1;
654 }
655
656 p = name;
657 while (p && *p && *p != '.' && p - name < namelen)
658 p++;
659 if (p == name || p - name > sizeof(n) - 1) {
660 if (pr != NULL)
661 mtx_unlock(&pr->pr_mtx);
662 return -1; /* label too long */
663 }
664 l = p - name;
665 strncpy(n, name, l);
666 if (pr != NULL)
667 mtx_unlock(&pr->pr_mtx);
668 n[(int)l] = '\0';
669 for (q = n; *q; q++) {
670 if ('A' <= *q && *q <= 'Z')
671 *q = *q - 'A' + 'a';
672 }
673
674 /* generate 16 bytes of pseudo-random value. */
675 bzero(&ctxt, sizeof(ctxt));
676 MD5Init(&ctxt);
677 MD5Update(&ctxt, &l, sizeof(l));
678 MD5Update(&ctxt, n, l);
679 MD5Final(digest, &ctxt);
680
681 bzero(in6, sizeof(*in6));
682 in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL;
683 in6->s6_addr8[11] = 2;
684 if (oldmcprefix == 0) {
685 in6->s6_addr8[12] = 0xff;
686 /* Copy the first 24 bits of 128-bit hash into the address. */
687 bcopy(digest, &in6->s6_addr8[13], 3);
688 } else {
689 /* Copy the first 32 bits of 128-bit hash into the address. */
690 bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
691 }
692 if (in6_setscope(in6, ifp, NULL))
693 return (-1); /* XXX: should not fail */
694
695 return 0;
696}
697
698int
699in6_nigroup(struct ifnet *ifp, const char *name, int namelen,
700 struct in6_addr *in6)
701{
702
703 return (in6_nigroup0(ifp, name, namelen, in6, 0));
704}
705
706int
707in6_nigroup_oldmcprefix(struct ifnet *ifp, const char *name, int namelen,
708 struct in6_addr *in6)
709{
710
711 return (in6_nigroup0(ifp, name, namelen, in6, 1));
712}
713
714/*
715 * XXX multiple loopback interface needs more care. for instance,
716 * nodelocal address needs to be configured onto only one of them.
717 * XXX multiple link-local address case
718 *
719 * altifp - secondary EUI64 source
720 */
721void
722in6_ifattach(struct ifnet *ifp, struct ifnet *altifp)
723{
724 struct in6_ifaddr *ia;
725 struct in6_addr in6;
726
727 /* some of the interfaces are inherently not IPv6 capable */
728 switch (ifp->if_type) {
729 case IFT_PFLOG:
730 case IFT_PFSYNC:
|
| 731 ND_IFINFO(ifp)->flags &= ~ND6_IFF_AUTO_LINKLOCAL;
732 ND_IFINFO(ifp)->flags |= ND6_IFF_IFDISABLED;
|
730 return;
731 }
732
733 /*
734 * quirks based on interface type
735 */
736 switch (ifp->if_type) {
| 733 return;
734 }
735
736 /*
737 * quirks based on interface type
738 */
739 switch (ifp->if_type) {
|
737#ifdef IFT_STF
| |
738 case IFT_STF:
739 /*
740 * 6to4 interface is a very special kind of beast.
741 * no multicast, no linklocal. RFC2529 specifies how to make
742 * linklocals for 6to4 interface, but there's no use and
743 * it is rather harmful to have one.
744 */
| 740 case IFT_STF:
741 /*
742 * 6to4 interface is a very special kind of beast.
743 * no multicast, no linklocal. RFC2529 specifies how to make
744 * linklocals for 6to4 interface, but there's no use and
745 * it is rather harmful to have one.
746 */
|
745 goto statinit;
746#endif
| 747 ND_IFINFO(ifp)->flags &= ~ND6_IFF_AUTO_LINKLOCAL;
748 break;
|
747 default:
748 break;
749 }
750
751 /*
752 * usually, we require multicast capability to the interface
753 */
754 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
755 nd6log((LOG_INFO, "in6_ifattach: "
756 "%s is not multicast capable, IPv6 not enabled\n",
757 if_name(ifp)));
758 return;
759 }
760
761 /*
762 * assign loopback address for loopback interface.
763 * XXX multiple loopback interface case.
764 */
765 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
766 struct ifaddr *ifa;
767
768 in6 = in6addr_loopback;
769 ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp, &in6);
770 if (ifa == NULL) {
771 if (in6_ifattach_loopback(ifp) != 0)
772 return;
773 } else
774 ifa_free(ifa);
775 }
776
777 /*
778 * assign a link-local address, if there's none.
779 */
| 749 default:
750 break;
751 }
752
753 /*
754 * usually, we require multicast capability to the interface
755 */
756 if ((ifp->if_flags & IFF_MULTICAST) == 0) {
757 nd6log((LOG_INFO, "in6_ifattach: "
758 "%s is not multicast capable, IPv6 not enabled\n",
759 if_name(ifp)));
760 return;
761 }
762
763 /*
764 * assign loopback address for loopback interface.
765 * XXX multiple loopback interface case.
766 */
767 if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
768 struct ifaddr *ifa;
769
770 in6 = in6addr_loopback;
771 ifa = (struct ifaddr *)in6ifa_ifpwithaddr(ifp, &in6);
772 if (ifa == NULL) {
773 if (in6_ifattach_loopback(ifp) != 0)
774 return;
775 } else
776 ifa_free(ifa);
777 }
778
779 /*
780 * assign a link-local address, if there's none.
781 */
|
780 if (ifp->if_type != IFT_BRIDGE &&
781 !(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
| 782 if (!(ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) &&
|
782 ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL) {
783 int error;
784
785 ia = in6ifa_ifpforlinklocal(ifp, 0);
786 if (ia == NULL) {
787 error = in6_ifattach_linklocal(ifp, altifp);
788#if 0
789 if (error)
790 log(LOG_NOTICE, "in6_ifattach_linklocal: "
791 "failed to add a link-local addr to %s\n",
792 if_name(ifp));
793#endif
794 } else
795 ifa_free(&ia->ia_ifa);
796 }
797
| 783 ND_IFINFO(ifp)->flags & ND6_IFF_AUTO_LINKLOCAL) {
784 int error;
785
786 ia = in6ifa_ifpforlinklocal(ifp, 0);
787 if (ia == NULL) {
788 error = in6_ifattach_linklocal(ifp, altifp);
789#if 0
790 if (error)
791 log(LOG_NOTICE, "in6_ifattach_linklocal: "
792 "failed to add a link-local addr to %s\n",
793 if_name(ifp));
794#endif
795 } else
796 ifa_free(&ia->ia_ifa);
797 }
798
|
798#ifdef IFT_STF /* XXX */
799statinit:
800#endif
801
| |
802 /* update dynamically. */
803 if (V_in6_maxmtu < ifp->if_mtu)
804 V_in6_maxmtu = ifp->if_mtu;
805}
806
807/*
808 * NOTE: in6_ifdetach() does not support loopback if at this moment.
809 * We don't need this function in bsdi, because interfaces are never removed
810 * from the ifnet list in bsdi.
811 */
812void
813in6_ifdetach(struct ifnet *ifp)
814{
815 struct in6_ifaddr *ia;
816 struct ifaddr *ifa, *next;
817 struct radix_node_head *rnh;
818 struct rtentry *rt;
819 struct sockaddr_in6 sin6;
820 struct in6_multi_mship *imm;
821
822 /* remove neighbor management table */
823 nd6_purge(ifp);
824
825 /* nuke any of IPv6 addresses we have */
826 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
827 if (ifa->ifa_addr->sa_family != AF_INET6)
828 continue;
829 in6_purgeaddr(ifa);
830 }
831
832 /* undo everything done by in6_ifattach(), just in case */
833 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
834 if (ifa->ifa_addr->sa_family != AF_INET6
835 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
836 continue;
837 }
838
839 ia = (struct in6_ifaddr *)ifa;
840
841 /*
842 * leave from multicast groups we have joined for the interface
843 */
844 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
845 LIST_REMOVE(imm, i6mm_chain);
846 in6_leavegroup(imm);
847 }
848
849 /* Remove link-local from the routing table. */
850 if (ia->ia_flags & IFA_ROUTE)
851 (void)rtinit(&ia->ia_ifa, RTM_DELETE, ia->ia_flags);
852
853 /* remove from the linked list */
854 IF_ADDR_WLOCK(ifp);
855 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
856 IF_ADDR_WUNLOCK(ifp);
857 ifa_free(ifa); /* if_addrhead */
858
859 IN6_IFADDR_WLOCK();
860 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
861 IN6_IFADDR_WUNLOCK();
862 ifa_free(ifa);
863 }
864
865 in6_pcbpurgeif0(&V_udbinfo, ifp);
866 in6_pcbpurgeif0(&V_ripcbinfo, ifp);
867 /* leave from all multicast groups joined */
868 in6_purgemaddrs(ifp);
869
870 /*
871 * remove neighbor management table. we call it twice just to make
872 * sure we nuke everything. maybe we need just one call.
873 * XXX: since the first call did not release addresses, some prefixes
874 * might remain. We should call nd6_purge() again to release the
875 * prefixes after removing all addresses above.
876 * (Or can we just delay calling nd6_purge until at this point?)
877 */
878 nd6_purge(ifp);
879
880 /*
881 * Remove route to link-local allnodes multicast (ff02::1).
882 * These only get automatically installed for the default FIB.
883 */
884 bzero(&sin6, sizeof(sin6));
885 sin6.sin6_len = sizeof(struct sockaddr_in6);
886 sin6.sin6_family = AF_INET6;
887 sin6.sin6_addr = in6addr_linklocal_allnodes;
888 if (in6_setscope(&sin6.sin6_addr, ifp, NULL))
889 /* XXX: should not fail */
890 return;
891 /* XXX grab lock first to avoid LOR */
892 rnh = rt_tables_get_rnh(RT_DEFAULT_FIB, AF_INET6);
893 if (rnh != NULL) {
894 RADIX_NODE_HEAD_LOCK(rnh);
895 rt = in6_rtalloc1((struct sockaddr *)&sin6, 0, RTF_RNH_LOCKED,
896 RT_DEFAULT_FIB);
897 if (rt) {
898 if (rt->rt_ifp == ifp)
899 rtexpunge(rt);
900 RTFREE_LOCKED(rt);
901 }
902 RADIX_NODE_HEAD_UNLOCK(rnh);
903 }
904}
905
906int
907in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf,
908 const u_int8_t *baseid, int generate)
909{
910 u_int8_t nullbuf[8];
911 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
912
913 bzero(nullbuf, sizeof(nullbuf));
914 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
915 /* we've never created a random ID. Create a new one. */
916 generate = 1;
917 }
918
919 if (generate) {
920 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
921
922 /* generate_tmp_ifid will update seedn and buf */
923 (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
924 ndi->randomid);
925 }
926 bcopy(ndi->randomid, retbuf, 8);
927
928 return (0);
929}
930
931void
932in6_tmpaddrtimer(void *arg)
933{
934 CURVNET_SET((struct vnet *) arg);
935 struct nd_ifinfo *ndi;
936 u_int8_t nullbuf[8];
937 struct ifnet *ifp;
938
939 callout_reset(&V_in6_tmpaddrtimer_ch,
940 (V_ip6_temp_preferred_lifetime - V_ip6_desync_factor -
941 V_ip6_temp_regen_advance) * hz, in6_tmpaddrtimer, curvnet);
942
943 bzero(nullbuf, sizeof(nullbuf));
944 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
945 ndi = ND_IFINFO(ifp);
946 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
947 /*
948 * We've been generating a random ID on this interface.
949 * Create a new one.
950 */
951 (void)generate_tmp_ifid(ndi->randomseed0,
952 ndi->randomseed1, ndi->randomid);
953 }
954 }
955
956 CURVNET_RESTORE();
957}
958
959static void
960in6_purgemaddrs(struct ifnet *ifp)
961{
962 LIST_HEAD(,in6_multi) purgeinms;
963 struct in6_multi *inm, *tinm;
964 struct ifmultiaddr *ifma;
965
966 LIST_INIT(&purgeinms);
967 IN6_MULTI_LOCK();
968
969 /*
970 * Extract list of in6_multi associated with the detaching ifp
971 * which the PF_INET6 layer is about to release.
972 * We need to do this as IF_ADDR_LOCK() may be re-acquired
973 * by code further down.
974 */
975 IF_ADDR_RLOCK(ifp);
976 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
977 if (ifma->ifma_addr->sa_family != AF_INET6 ||
978 ifma->ifma_protospec == NULL)
979 continue;
980 inm = (struct in6_multi *)ifma->ifma_protospec;
981 LIST_INSERT_HEAD(&purgeinms, inm, in6m_entry);
982 }
983 IF_ADDR_RUNLOCK(ifp);
984
985 LIST_FOREACH_SAFE(inm, &purgeinms, in6m_entry, tinm) {
986 LIST_REMOVE(inm, in6m_entry);
987 in6m_release_locked(inm);
988 }
989 mld_ifdetach(ifp);
990
991 IN6_MULTI_UNLOCK();
992}
| 799 /* update dynamically. */
800 if (V_in6_maxmtu < ifp->if_mtu)
801 V_in6_maxmtu = ifp->if_mtu;
802}
803
804/*
805 * NOTE: in6_ifdetach() does not support loopback if at this moment.
806 * We don't need this function in bsdi, because interfaces are never removed
807 * from the ifnet list in bsdi.
808 */
809void
810in6_ifdetach(struct ifnet *ifp)
811{
812 struct in6_ifaddr *ia;
813 struct ifaddr *ifa, *next;
814 struct radix_node_head *rnh;
815 struct rtentry *rt;
816 struct sockaddr_in6 sin6;
817 struct in6_multi_mship *imm;
818
819 /* remove neighbor management table */
820 nd6_purge(ifp);
821
822 /* nuke any of IPv6 addresses we have */
823 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
824 if (ifa->ifa_addr->sa_family != AF_INET6)
825 continue;
826 in6_purgeaddr(ifa);
827 }
828
829 /* undo everything done by in6_ifattach(), just in case */
830 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
831 if (ifa->ifa_addr->sa_family != AF_INET6
832 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) {
833 continue;
834 }
835
836 ia = (struct in6_ifaddr *)ifa;
837
838 /*
839 * leave from multicast groups we have joined for the interface
840 */
841 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
842 LIST_REMOVE(imm, i6mm_chain);
843 in6_leavegroup(imm);
844 }
845
846 /* Remove link-local from the routing table. */
847 if (ia->ia_flags & IFA_ROUTE)
848 (void)rtinit(&ia->ia_ifa, RTM_DELETE, ia->ia_flags);
849
850 /* remove from the linked list */
851 IF_ADDR_WLOCK(ifp);
852 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
853 IF_ADDR_WUNLOCK(ifp);
854 ifa_free(ifa); /* if_addrhead */
855
856 IN6_IFADDR_WLOCK();
857 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
858 IN6_IFADDR_WUNLOCK();
859 ifa_free(ifa);
860 }
861
862 in6_pcbpurgeif0(&V_udbinfo, ifp);
863 in6_pcbpurgeif0(&V_ripcbinfo, ifp);
864 /* leave from all multicast groups joined */
865 in6_purgemaddrs(ifp);
866
867 /*
868 * remove neighbor management table. we call it twice just to make
869 * sure we nuke everything. maybe we need just one call.
870 * XXX: since the first call did not release addresses, some prefixes
871 * might remain. We should call nd6_purge() again to release the
872 * prefixes after removing all addresses above.
873 * (Or can we just delay calling nd6_purge until at this point?)
874 */
875 nd6_purge(ifp);
876
877 /*
878 * Remove route to link-local allnodes multicast (ff02::1).
879 * These only get automatically installed for the default FIB.
880 */
881 bzero(&sin6, sizeof(sin6));
882 sin6.sin6_len = sizeof(struct sockaddr_in6);
883 sin6.sin6_family = AF_INET6;
884 sin6.sin6_addr = in6addr_linklocal_allnodes;
885 if (in6_setscope(&sin6.sin6_addr, ifp, NULL))
886 /* XXX: should not fail */
887 return;
888 /* XXX grab lock first to avoid LOR */
889 rnh = rt_tables_get_rnh(RT_DEFAULT_FIB, AF_INET6);
890 if (rnh != NULL) {
891 RADIX_NODE_HEAD_LOCK(rnh);
892 rt = in6_rtalloc1((struct sockaddr *)&sin6, 0, RTF_RNH_LOCKED,
893 RT_DEFAULT_FIB);
894 if (rt) {
895 if (rt->rt_ifp == ifp)
896 rtexpunge(rt);
897 RTFREE_LOCKED(rt);
898 }
899 RADIX_NODE_HEAD_UNLOCK(rnh);
900 }
901}
902
903int
904in6_get_tmpifid(struct ifnet *ifp, u_int8_t *retbuf,
905 const u_int8_t *baseid, int generate)
906{
907 u_int8_t nullbuf[8];
908 struct nd_ifinfo *ndi = ND_IFINFO(ifp);
909
910 bzero(nullbuf, sizeof(nullbuf));
911 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) {
912 /* we've never created a random ID. Create a new one. */
913 generate = 1;
914 }
915
916 if (generate) {
917 bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
918
919 /* generate_tmp_ifid will update seedn and buf */
920 (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
921 ndi->randomid);
922 }
923 bcopy(ndi->randomid, retbuf, 8);
924
925 return (0);
926}
927
928void
929in6_tmpaddrtimer(void *arg)
930{
931 CURVNET_SET((struct vnet *) arg);
932 struct nd_ifinfo *ndi;
933 u_int8_t nullbuf[8];
934 struct ifnet *ifp;
935
936 callout_reset(&V_in6_tmpaddrtimer_ch,
937 (V_ip6_temp_preferred_lifetime - V_ip6_desync_factor -
938 V_ip6_temp_regen_advance) * hz, in6_tmpaddrtimer, curvnet);
939
940 bzero(nullbuf, sizeof(nullbuf));
941 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
942 ndi = ND_IFINFO(ifp);
943 if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
944 /*
945 * We've been generating a random ID on this interface.
946 * Create a new one.
947 */
948 (void)generate_tmp_ifid(ndi->randomseed0,
949 ndi->randomseed1, ndi->randomid);
950 }
951 }
952
953 CURVNET_RESTORE();
954}
955
956static void
957in6_purgemaddrs(struct ifnet *ifp)
958{
959 LIST_HEAD(,in6_multi) purgeinms;
960 struct in6_multi *inm, *tinm;
961 struct ifmultiaddr *ifma;
962
963 LIST_INIT(&purgeinms);
964 IN6_MULTI_LOCK();
965
966 /*
967 * Extract list of in6_multi associated with the detaching ifp
968 * which the PF_INET6 layer is about to release.
969 * We need to do this as IF_ADDR_LOCK() may be re-acquired
970 * by code further down.
971 */
972 IF_ADDR_RLOCK(ifp);
973 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
974 if (ifma->ifma_addr->sa_family != AF_INET6 ||
975 ifma->ifma_protospec == NULL)
976 continue;
977 inm = (struct in6_multi *)ifma->ifma_protospec;
978 LIST_INSERT_HEAD(&purgeinms, inm, in6m_entry);
979 }
980 IF_ADDR_RUNLOCK(ifp);
981
982 LIST_FOREACH_SAFE(inm, &purgeinms, in6m_entry, tinm) {
983 LIST_REMOVE(inm, in6m_entry);
984 in6m_release_locked(inm);
985 }
986 mld_ifdetach(ifp);
987
988 IN6_MULTI_UNLOCK();
989}
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