2/* $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 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#include "opt_ipsec.h"
34
35/* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
36
37#include <sys/types.h>
38#include <sys/param.h>
39#include <sys/domain.h>
40#include <sys/errno.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/malloc.h>
44#include <sys/mbuf.h>
45#include <sys/mutex.h>
46#include <sys/protosw.h>
47#include <sys/signalvar.h>
48#include <sys/socket.h>
49#include <sys/socketvar.h>
50#include <sys/sysctl.h>
51#include <sys/systm.h>
52
53#include <net/raw_cb.h>
54#include <net/route.h>
55
56#include <net/pfkeyv2.h>
57#include <netipsec/key.h>
58#include <netipsec/keysock.h>
59#include <netipsec/key_debug.h>
60
61#include <machine/stdarg.h>
62
63struct key_cb {
64 int key_count;
65 int any_count;
66};
67static struct key_cb key_cb;
68
69static struct sockaddr key_dst = { 2, PF_KEY, };
70static struct sockaddr key_src = { 2, PF_KEY, };
71
72static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
73
74struct pfkeystat pfkeystat;
75
76/*
77 * key_output()
78 */
79int
80#if __STDC__
81key_output(struct mbuf *m, ...)
82#else
83key_output(m, va_alist)
84 struct mbuf *m;
85 va_dcl
86#endif
87{
88 struct sadb_msg *msg;
89 int len, error = 0;
90 int s;
91 struct socket *so;
92 va_list ap;
93
94 va_start(ap, m);
95 so = va_arg(ap, struct socket *);
96 va_end(ap);
97
98 if (m == 0)
99 panic("%s: NULL pointer was passed.\n", __func__);
100
101 pfkeystat.out_total++;
102 pfkeystat.out_bytes += m->m_pkthdr.len;
103
104 len = m->m_pkthdr.len;
105 if (len < sizeof(struct sadb_msg)) {
106 pfkeystat.out_tooshort++;
107 error = EINVAL;
108 goto end;
109 }
110
111 if (m->m_len < sizeof(struct sadb_msg)) {
112 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
113 pfkeystat.out_nomem++;
114 error = ENOBUFS;
115 goto end;
116 }
117 }
118
119 M_ASSERTPKTHDR(m);
120
121 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
122
123 msg = mtod(m, struct sadb_msg *);
124 pfkeystat.out_msgtype[msg->sadb_msg_type]++;
125 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
126 pfkeystat.out_invlen++;
127 error = EINVAL;
128 goto end;
129 }
130
131 /*XXX giant lock*/
132 s = splnet();
133 error = key_parse(m, so);
134 m = NULL;
135 splx(s);
136end:
137 if (m)
138 m_freem(m);
139 return error;
140}
141
142/*
143 * send message to the socket.
144 */
145static int
146key_sendup0(rp, m, promisc)
147 struct rawcb *rp;
148 struct mbuf *m;
149 int promisc;
150{
151 int error;
152
153 if (promisc) {
154 struct sadb_msg *pmsg;
155
156 M_PREPEND(m, sizeof(struct sadb_msg), M_DONTWAIT);
157 if (m && m->m_len < sizeof(struct sadb_msg))
158 m = m_pullup(m, sizeof(struct sadb_msg));
159 if (!m) {
160 pfkeystat.in_nomem++;
161 m_freem(m);
162 return ENOBUFS;
163 }
164 m->m_pkthdr.len += sizeof(*pmsg);
165
166 pmsg = mtod(m, struct sadb_msg *);
167 bzero(pmsg, sizeof(*pmsg));
168 pmsg->sadb_msg_version = PF_KEY_V2;
169 pmsg->sadb_msg_type = SADB_X_PROMISC;
170 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
171 /* pid and seq? */
172
173 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
174 }
175
176 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
177 m, NULL)) {
178 pfkeystat.in_nomem++;
179 m_freem(m);
180 error = ENOBUFS;
181 } else
182 error = 0;
183 sorwakeup(rp->rcb_socket);
184 return error;
185}
186
187/* XXX this interface should be obsoleted. */
188int
189key_sendup(so, msg, len, target)
190 struct socket *so;
191 struct sadb_msg *msg;
192 u_int len;
193 int target; /*target of the resulting message*/
194{
195 struct mbuf *m, *n, *mprev;
196 int tlen;
197
198 /* sanity check */
199 if (so == 0 || msg == 0)
200 panic("%s: NULL pointer was passed.\n", __func__);
201
202 KEYDEBUG(KEYDEBUG_KEY_DUMP,
203 printf("%s: \n", __func__);
204 kdebug_sadb(msg));
205
206 /*
207 * we increment statistics here, just in case we have ENOBUFS
208 * in this function.
209 */
210 pfkeystat.in_total++;
211 pfkeystat.in_bytes += len;
212 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
213
214 /*
215 * Get mbuf chain whenever possible (not clusters),
216 * to save socket buffer. We'll be generating many SADB_ACQUIRE
217 * messages to listening key sockets. If we simply allocate clusters,
218 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
219 * sbspace() computes # of actual data bytes AND mbuf region.
220 *
221 * TODO: SADB_ACQUIRE filters should be implemented.
222 */
223 tlen = len;
224 m = mprev = NULL;
225 while (tlen > 0) {
226 if (tlen == len) {
227 MGETHDR(n, M_DONTWAIT, MT_DATA);
228 n->m_len = MHLEN;
229 } else {
230 MGET(n, M_DONTWAIT, MT_DATA);
231 n->m_len = MLEN;
232 }
233 if (!n) {
234 pfkeystat.in_nomem++;
235 return ENOBUFS;
236 }
237 if (tlen >= MCLBYTES) { /*XXX better threshold? */
238 MCLGET(n, M_DONTWAIT);
239 if ((n->m_flags & M_EXT) == 0) {
240 m_free(n);
241 m_freem(m);
242 pfkeystat.in_nomem++;
243 return ENOBUFS;
244 }
245 n->m_len = MCLBYTES;
246 }
247
248 if (tlen < n->m_len)
249 n->m_len = tlen;
250 n->m_next = NULL;
251 if (m == NULL)
252 m = mprev = n;
253 else {
254 mprev->m_next = n;
255 mprev = n;
256 }
257 tlen -= n->m_len;
258 n = NULL;
259 }
260 m->m_pkthdr.len = len;
261 m->m_pkthdr.rcvif = NULL;
262 m_copyback(m, 0, len, (caddr_t)msg);
263
264 /* avoid duplicated statistics */
265 pfkeystat.in_total--;
266 pfkeystat.in_bytes -= len;
267 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
268
269 return key_sendup_mbuf(so, m, target);
270}
271
272/* so can be NULL if target != KEY_SENDUP_ONE */
273int
274key_sendup_mbuf(so, m, target)
275 struct socket *so;
276 struct mbuf *m;
277 int target;
278{
279 struct mbuf *n;
280 struct keycb *kp;
281 int sendup;
282 struct rawcb *rp;
283 int error = 0;
284
285 if (m == NULL)
286 panic("key_sendup_mbuf: NULL pointer was passed.\n");
287 if (so == NULL && target == KEY_SENDUP_ONE)
288 panic("%s: NULL pointer was passed.\n", __func__);
289
290 pfkeystat.in_total++;
291 pfkeystat.in_bytes += m->m_pkthdr.len;
292 if (m->m_len < sizeof(struct sadb_msg)) {
293#if 1
294 m = m_pullup(m, sizeof(struct sadb_msg));
295 if (m == NULL) {
296 pfkeystat.in_nomem++;
297 return ENOBUFS;
298 }
299#else
300 /* don't bother pulling it up just for stats */
301#endif
302 }
303 if (m->m_len >= sizeof(struct sadb_msg)) {
304 struct sadb_msg *msg;
305 msg = mtod(m, struct sadb_msg *);
306 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
307 }
308
309 LIST_FOREACH(rp, &rawcb_list, list)
310 {
311 if (rp->rcb_proto.sp_family != PF_KEY)
312 continue;
313 if (rp->rcb_proto.sp_protocol
314 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
315 continue;
316 }
317
318 kp = (struct keycb *)rp;
319
320 /*
321 * If you are in promiscuous mode, and when you get broadcasted
322 * reply, you'll get two PF_KEY messages.
323 * (based on pf_key@inner.net message on 14 Oct 1998)
324 */
325 if (((struct keycb *)rp)->kp_promisc) {
326 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
327 (void)key_sendup0(rp, n, 1);
328 n = NULL;
329 }
330 }
331
332 /* the exact target will be processed later */
333 if (so && sotorawcb(so) == rp)
334 continue;
335
336 sendup = 0;
337 switch (target) {
338 case KEY_SENDUP_ONE:
339 /* the statement has no effect */
340 if (so && sotorawcb(so) == rp)
341 sendup++;
342 break;
343 case KEY_SENDUP_ALL:
344 sendup++;
345 break;
346 case KEY_SENDUP_REGISTERED:
347 if (kp->kp_registered)
348 sendup++;
349 break;
350 }
351 pfkeystat.in_msgtarget[target]++;
352
353 if (!sendup)
354 continue;
355
356 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
357 m_freem(m);
358 pfkeystat.in_nomem++;
359 return ENOBUFS;
360 }
361
362 if ((error = key_sendup0(rp, n, 0)) != 0) {
363 m_freem(m);
364 return error;
365 }
366
367 n = NULL;
368 }
369
370 if (so) {
371 error = key_sendup0(sotorawcb(so), m, 0);
372 m = NULL;
373 } else {
374 error = 0;
375 m_freem(m);
376 }
377 return error;
378}
379
380/*
381 * key_abort()
382 * derived from net/rtsock.c:rts_abort()
383 */
384static int
385key_abort(struct socket *so)
386{
387 int s, error;
388 s = splnet();
389 error = raw_usrreqs.pru_abort(so);
390 splx(s);
391 return error;
392}
393
394/*
395 * key_attach()
396 * derived from net/rtsock.c:rts_attach()
397 */
398static int
399key_attach(struct socket *so, int proto, struct thread *td)
400{
401 struct keycb *kp;
402 int s, error;
403
404 if (sotorawcb(so) != 0)
405 return EISCONN; /* XXX panic? */
406 kp = (struct keycb *)malloc(sizeof *kp, M_PCB, M_WAITOK|M_ZERO); /* XXX */
407 if (kp == 0)
408 return ENOBUFS;
409
410 /*
411 * The splnet() is necessary to block protocols from sending
412 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
413 * this PCB is extant but incompletely initialized.
414 * Probably we should try to do more of this work beforehand and
415 * eliminate the spl.
416 */
417 s = splnet();
418 so->so_pcb = (caddr_t)kp;
419 error = raw_usrreqs.pru_attach(so, proto, td);
420 kp = (struct keycb *)sotorawcb(so);
421 if (error) {
422 free(kp, M_PCB);
423 so->so_pcb = (caddr_t) 0;
424 splx(s);
425 return error;
426 }
427
428 kp->kp_promisc = kp->kp_registered = 0;
429
430 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
431 key_cb.key_count++;
432 key_cb.any_count++;
433 kp->kp_raw.rcb_laddr = &key_src;
434 kp->kp_raw.rcb_faddr = &key_dst;
435 soisconnected(so);
436 so->so_options |= SO_USELOOPBACK;
437
438 splx(s);
439 return 0;
440}
441
442/*
443 * key_bind()
444 * derived from net/rtsock.c:rts_bind()
445 */
446static int
447key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
448{
449 int s, error;
450 s = splnet();
451 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
452 splx(s);
453 return error;
454}
455
456/*
457 * key_connect()
458 * derived from net/rtsock.c:rts_connect()
459 */
460static int
461key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
462{
463 int s, error;
464 s = splnet();
465 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
466 splx(s);
467 return error;
468}
469
470/*
471 * key_detach()
472 * derived from net/rtsock.c:rts_detach()
473 */
474static int
475key_detach(struct socket *so)
476{
477 struct keycb *kp = (struct keycb *)sotorawcb(so);
478 int s, error;
479
480 s = splnet();
481 if (kp != 0) {
482 if (kp->kp_raw.rcb_proto.sp_protocol
483 == PF_KEY) /* XXX: AF_KEY */
484 key_cb.key_count--;
485 key_cb.any_count--;
486
487 key_freereg(so);
488 }
489 error = raw_usrreqs.pru_detach(so);
490 splx(s);
491 return error;
492}
493
494/*
495 * key_disconnect()
496 * derived from net/rtsock.c:key_disconnect()
497 */
498static int
499key_disconnect(struct socket *so)
500{
501 int s, error;
502 s = splnet();
503 error = raw_usrreqs.pru_disconnect(so);
504 splx(s);
505 return error;
506}
507
508/*
509 * key_peeraddr()
510 * derived from net/rtsock.c:rts_peeraddr()
511 */
512static int
513key_peeraddr(struct socket *so, struct sockaddr **nam)
514{
515 int s, error;
516 s = splnet();
517 error = raw_usrreqs.pru_peeraddr(so, nam);
518 splx(s);
519 return error;
520}
521
522/*
523 * key_send()
524 * derived from net/rtsock.c:rts_send()
525 */
526static int
527key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
528 struct mbuf *control, struct thread *td)
529{
530 int s, error;
531 s = splnet();
532 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
533 splx(s);
534 return error;
535}
536
537/*
538 * key_shutdown()
539 * derived from net/rtsock.c:rts_shutdown()
540 */
541static int
542key_shutdown(struct socket *so)
543{
544 int s, error;
545 s = splnet();
546 error = raw_usrreqs.pru_shutdown(so);
547 splx(s);
548 return error;
549}
550
551/*
552 * key_sockaddr()
553 * derived from net/rtsock.c:rts_sockaddr()
554 */
555static int
556key_sockaddr(struct socket *so, struct sockaddr **nam)
557{
558 int s, error;
559 s = splnet();
560 error = raw_usrreqs.pru_sockaddr(so, nam);
561 splx(s);
562 return error;
563}
564
565struct pr_usrreqs key_usrreqs = {
| 2/* $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 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#include "opt_ipsec.h"
34
35/* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
36
37#include <sys/types.h>
38#include <sys/param.h>
39#include <sys/domain.h>
40#include <sys/errno.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/malloc.h>
44#include <sys/mbuf.h>
45#include <sys/mutex.h>
46#include <sys/protosw.h>
47#include <sys/signalvar.h>
48#include <sys/socket.h>
49#include <sys/socketvar.h>
50#include <sys/sysctl.h>
51#include <sys/systm.h>
52
53#include <net/raw_cb.h>
54#include <net/route.h>
55
56#include <net/pfkeyv2.h>
57#include <netipsec/key.h>
58#include <netipsec/keysock.h>
59#include <netipsec/key_debug.h>
60
61#include <machine/stdarg.h>
62
63struct key_cb {
64 int key_count;
65 int any_count;
66};
67static struct key_cb key_cb;
68
69static struct sockaddr key_dst = { 2, PF_KEY, };
70static struct sockaddr key_src = { 2, PF_KEY, };
71
72static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
73
74struct pfkeystat pfkeystat;
75
76/*
77 * key_output()
78 */
79int
80#if __STDC__
81key_output(struct mbuf *m, ...)
82#else
83key_output(m, va_alist)
84 struct mbuf *m;
85 va_dcl
86#endif
87{
88 struct sadb_msg *msg;
89 int len, error = 0;
90 int s;
91 struct socket *so;
92 va_list ap;
93
94 va_start(ap, m);
95 so = va_arg(ap, struct socket *);
96 va_end(ap);
97
98 if (m == 0)
99 panic("%s: NULL pointer was passed.\n", __func__);
100
101 pfkeystat.out_total++;
102 pfkeystat.out_bytes += m->m_pkthdr.len;
103
104 len = m->m_pkthdr.len;
105 if (len < sizeof(struct sadb_msg)) {
106 pfkeystat.out_tooshort++;
107 error = EINVAL;
108 goto end;
109 }
110
111 if (m->m_len < sizeof(struct sadb_msg)) {
112 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
113 pfkeystat.out_nomem++;
114 error = ENOBUFS;
115 goto end;
116 }
117 }
118
119 M_ASSERTPKTHDR(m);
120
121 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
122
123 msg = mtod(m, struct sadb_msg *);
124 pfkeystat.out_msgtype[msg->sadb_msg_type]++;
125 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
126 pfkeystat.out_invlen++;
127 error = EINVAL;
128 goto end;
129 }
130
131 /*XXX giant lock*/
132 s = splnet();
133 error = key_parse(m, so);
134 m = NULL;
135 splx(s);
136end:
137 if (m)
138 m_freem(m);
139 return error;
140}
141
142/*
143 * send message to the socket.
144 */
145static int
146key_sendup0(rp, m, promisc)
147 struct rawcb *rp;
148 struct mbuf *m;
149 int promisc;
150{
151 int error;
152
153 if (promisc) {
154 struct sadb_msg *pmsg;
155
156 M_PREPEND(m, sizeof(struct sadb_msg), M_DONTWAIT);
157 if (m && m->m_len < sizeof(struct sadb_msg))
158 m = m_pullup(m, sizeof(struct sadb_msg));
159 if (!m) {
160 pfkeystat.in_nomem++;
161 m_freem(m);
162 return ENOBUFS;
163 }
164 m->m_pkthdr.len += sizeof(*pmsg);
165
166 pmsg = mtod(m, struct sadb_msg *);
167 bzero(pmsg, sizeof(*pmsg));
168 pmsg->sadb_msg_version = PF_KEY_V2;
169 pmsg->sadb_msg_type = SADB_X_PROMISC;
170 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
171 /* pid and seq? */
172
173 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
174 }
175
176 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
177 m, NULL)) {
178 pfkeystat.in_nomem++;
179 m_freem(m);
180 error = ENOBUFS;
181 } else
182 error = 0;
183 sorwakeup(rp->rcb_socket);
184 return error;
185}
186
187/* XXX this interface should be obsoleted. */
188int
189key_sendup(so, msg, len, target)
190 struct socket *so;
191 struct sadb_msg *msg;
192 u_int len;
193 int target; /*target of the resulting message*/
194{
195 struct mbuf *m, *n, *mprev;
196 int tlen;
197
198 /* sanity check */
199 if (so == 0 || msg == 0)
200 panic("%s: NULL pointer was passed.\n", __func__);
201
202 KEYDEBUG(KEYDEBUG_KEY_DUMP,
203 printf("%s: \n", __func__);
204 kdebug_sadb(msg));
205
206 /*
207 * we increment statistics here, just in case we have ENOBUFS
208 * in this function.
209 */
210 pfkeystat.in_total++;
211 pfkeystat.in_bytes += len;
212 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
213
214 /*
215 * Get mbuf chain whenever possible (not clusters),
216 * to save socket buffer. We'll be generating many SADB_ACQUIRE
217 * messages to listening key sockets. If we simply allocate clusters,
218 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
219 * sbspace() computes # of actual data bytes AND mbuf region.
220 *
221 * TODO: SADB_ACQUIRE filters should be implemented.
222 */
223 tlen = len;
224 m = mprev = NULL;
225 while (tlen > 0) {
226 if (tlen == len) {
227 MGETHDR(n, M_DONTWAIT, MT_DATA);
228 n->m_len = MHLEN;
229 } else {
230 MGET(n, M_DONTWAIT, MT_DATA);
231 n->m_len = MLEN;
232 }
233 if (!n) {
234 pfkeystat.in_nomem++;
235 return ENOBUFS;
236 }
237 if (tlen >= MCLBYTES) { /*XXX better threshold? */
238 MCLGET(n, M_DONTWAIT);
239 if ((n->m_flags & M_EXT) == 0) {
240 m_free(n);
241 m_freem(m);
242 pfkeystat.in_nomem++;
243 return ENOBUFS;
244 }
245 n->m_len = MCLBYTES;
246 }
247
248 if (tlen < n->m_len)
249 n->m_len = tlen;
250 n->m_next = NULL;
251 if (m == NULL)
252 m = mprev = n;
253 else {
254 mprev->m_next = n;
255 mprev = n;
256 }
257 tlen -= n->m_len;
258 n = NULL;
259 }
260 m->m_pkthdr.len = len;
261 m->m_pkthdr.rcvif = NULL;
262 m_copyback(m, 0, len, (caddr_t)msg);
263
264 /* avoid duplicated statistics */
265 pfkeystat.in_total--;
266 pfkeystat.in_bytes -= len;
267 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
268
269 return key_sendup_mbuf(so, m, target);
270}
271
272/* so can be NULL if target != KEY_SENDUP_ONE */
273int
274key_sendup_mbuf(so, m, target)
275 struct socket *so;
276 struct mbuf *m;
277 int target;
278{
279 struct mbuf *n;
280 struct keycb *kp;
281 int sendup;
282 struct rawcb *rp;
283 int error = 0;
284
285 if (m == NULL)
286 panic("key_sendup_mbuf: NULL pointer was passed.\n");
287 if (so == NULL && target == KEY_SENDUP_ONE)
288 panic("%s: NULL pointer was passed.\n", __func__);
289
290 pfkeystat.in_total++;
291 pfkeystat.in_bytes += m->m_pkthdr.len;
292 if (m->m_len < sizeof(struct sadb_msg)) {
293#if 1
294 m = m_pullup(m, sizeof(struct sadb_msg));
295 if (m == NULL) {
296 pfkeystat.in_nomem++;
297 return ENOBUFS;
298 }
299#else
300 /* don't bother pulling it up just for stats */
301#endif
302 }
303 if (m->m_len >= sizeof(struct sadb_msg)) {
304 struct sadb_msg *msg;
305 msg = mtod(m, struct sadb_msg *);
306 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
307 }
308
309 LIST_FOREACH(rp, &rawcb_list, list)
310 {
311 if (rp->rcb_proto.sp_family != PF_KEY)
312 continue;
313 if (rp->rcb_proto.sp_protocol
314 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
315 continue;
316 }
317
318 kp = (struct keycb *)rp;
319
320 /*
321 * If you are in promiscuous mode, and when you get broadcasted
322 * reply, you'll get two PF_KEY messages.
323 * (based on pf_key@inner.net message on 14 Oct 1998)
324 */
325 if (((struct keycb *)rp)->kp_promisc) {
326 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
327 (void)key_sendup0(rp, n, 1);
328 n = NULL;
329 }
330 }
331
332 /* the exact target will be processed later */
333 if (so && sotorawcb(so) == rp)
334 continue;
335
336 sendup = 0;
337 switch (target) {
338 case KEY_SENDUP_ONE:
339 /* the statement has no effect */
340 if (so && sotorawcb(so) == rp)
341 sendup++;
342 break;
343 case KEY_SENDUP_ALL:
344 sendup++;
345 break;
346 case KEY_SENDUP_REGISTERED:
347 if (kp->kp_registered)
348 sendup++;
349 break;
350 }
351 pfkeystat.in_msgtarget[target]++;
352
353 if (!sendup)
354 continue;
355
356 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
357 m_freem(m);
358 pfkeystat.in_nomem++;
359 return ENOBUFS;
360 }
361
362 if ((error = key_sendup0(rp, n, 0)) != 0) {
363 m_freem(m);
364 return error;
365 }
366
367 n = NULL;
368 }
369
370 if (so) {
371 error = key_sendup0(sotorawcb(so), m, 0);
372 m = NULL;
373 } else {
374 error = 0;
375 m_freem(m);
376 }
377 return error;
378}
379
380/*
381 * key_abort()
382 * derived from net/rtsock.c:rts_abort()
383 */
384static int
385key_abort(struct socket *so)
386{
387 int s, error;
388 s = splnet();
389 error = raw_usrreqs.pru_abort(so);
390 splx(s);
391 return error;
392}
393
394/*
395 * key_attach()
396 * derived from net/rtsock.c:rts_attach()
397 */
398static int
399key_attach(struct socket *so, int proto, struct thread *td)
400{
401 struct keycb *kp;
402 int s, error;
403
404 if (sotorawcb(so) != 0)
405 return EISCONN; /* XXX panic? */
406 kp = (struct keycb *)malloc(sizeof *kp, M_PCB, M_WAITOK|M_ZERO); /* XXX */
407 if (kp == 0)
408 return ENOBUFS;
409
410 /*
411 * The splnet() is necessary to block protocols from sending
412 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
413 * this PCB is extant but incompletely initialized.
414 * Probably we should try to do more of this work beforehand and
415 * eliminate the spl.
416 */
417 s = splnet();
418 so->so_pcb = (caddr_t)kp;
419 error = raw_usrreqs.pru_attach(so, proto, td);
420 kp = (struct keycb *)sotorawcb(so);
421 if (error) {
422 free(kp, M_PCB);
423 so->so_pcb = (caddr_t) 0;
424 splx(s);
425 return error;
426 }
427
428 kp->kp_promisc = kp->kp_registered = 0;
429
430 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
431 key_cb.key_count++;
432 key_cb.any_count++;
433 kp->kp_raw.rcb_laddr = &key_src;
434 kp->kp_raw.rcb_faddr = &key_dst;
435 soisconnected(so);
436 so->so_options |= SO_USELOOPBACK;
437
438 splx(s);
439 return 0;
440}
441
442/*
443 * key_bind()
444 * derived from net/rtsock.c:rts_bind()
445 */
446static int
447key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
448{
449 int s, error;
450 s = splnet();
451 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
452 splx(s);
453 return error;
454}
455
456/*
457 * key_connect()
458 * derived from net/rtsock.c:rts_connect()
459 */
460static int
461key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
462{
463 int s, error;
464 s = splnet();
465 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
466 splx(s);
467 return error;
468}
469
470/*
471 * key_detach()
472 * derived from net/rtsock.c:rts_detach()
473 */
474static int
475key_detach(struct socket *so)
476{
477 struct keycb *kp = (struct keycb *)sotorawcb(so);
478 int s, error;
479
480 s = splnet();
481 if (kp != 0) {
482 if (kp->kp_raw.rcb_proto.sp_protocol
483 == PF_KEY) /* XXX: AF_KEY */
484 key_cb.key_count--;
485 key_cb.any_count--;
486
487 key_freereg(so);
488 }
489 error = raw_usrreqs.pru_detach(so);
490 splx(s);
491 return error;
492}
493
494/*
495 * key_disconnect()
496 * derived from net/rtsock.c:key_disconnect()
497 */
498static int
499key_disconnect(struct socket *so)
500{
501 int s, error;
502 s = splnet();
503 error = raw_usrreqs.pru_disconnect(so);
504 splx(s);
505 return error;
506}
507
508/*
509 * key_peeraddr()
510 * derived from net/rtsock.c:rts_peeraddr()
511 */
512static int
513key_peeraddr(struct socket *so, struct sockaddr **nam)
514{
515 int s, error;
516 s = splnet();
517 error = raw_usrreqs.pru_peeraddr(so, nam);
518 splx(s);
519 return error;
520}
521
522/*
523 * key_send()
524 * derived from net/rtsock.c:rts_send()
525 */
526static int
527key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
528 struct mbuf *control, struct thread *td)
529{
530 int s, error;
531 s = splnet();
532 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
533 splx(s);
534 return error;
535}
536
537/*
538 * key_shutdown()
539 * derived from net/rtsock.c:rts_shutdown()
540 */
541static int
542key_shutdown(struct socket *so)
543{
544 int s, error;
545 s = splnet();
546 error = raw_usrreqs.pru_shutdown(so);
547 splx(s);
548 return error;
549}
550
551/*
552 * key_sockaddr()
553 * derived from net/rtsock.c:rts_sockaddr()
554 */
555static int
556key_sockaddr(struct socket *so, struct sockaddr **nam)
557{
558 int s, error;
559 s = splnet();
560 error = raw_usrreqs.pru_sockaddr(so, nam);
561 splx(s);
562 return error;
563}
564
565struct pr_usrreqs key_usrreqs = {
|
574};
575
576/* sysctl */
577SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
578
579/*
580 * Definitions of protocols supported in the KEY domain.
581 */
582
583extern struct domain keydomain;
584
585struct protosw keysw[] = {
586{ SOCK_RAW, &keydomain, PF_KEY_V2, PR_ATOMIC|PR_ADDR,
587 0, (pr_output_t *)key_output, raw_ctlinput, 0,
588 0,
589 raw_init, 0, 0, 0,
590 &key_usrreqs
591}
592};
593
594static void
595key_init0(void)
596{
597 bzero((caddr_t)&key_cb, sizeof(key_cb));
598 key_init();
599}
600
601struct domain keydomain =
602 { PF_KEY, "key", key_init0, 0, 0,
603 keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])] };
604
605DOMAIN_SET(key);
| 576};
577
578/* sysctl */
579SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
580
581/*
582 * Definitions of protocols supported in the KEY domain.
583 */
584
585extern struct domain keydomain;
586
587struct protosw keysw[] = {
588{ SOCK_RAW, &keydomain, PF_KEY_V2, PR_ATOMIC|PR_ADDR,
589 0, (pr_output_t *)key_output, raw_ctlinput, 0,
590 0,
591 raw_init, 0, 0, 0,
592 &key_usrreqs
593}
594};
595
596static void
597key_init0(void)
598{
599 bzero((caddr_t)&key_cb, sizeof(key_cb));
600 key_init();
601}
602
603struct domain keydomain =
604 { PF_KEY, "key", key_init0, 0, 0,
605 keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])] };
606
607DOMAIN_SET(key);
|