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/malloc.h>
43#include <sys/mbuf.h>
44#include <sys/protosw.h>
45#include <sys/signalvar.h>
46#include <sys/socket.h>
47#include <sys/socketvar.h>
48#include <sys/sysctl.h>
49#include <sys/systm.h>
50
51#include <net/raw_cb.h>
52#include <net/route.h>
53
54#include <net/pfkeyv2.h>
55#include <netipsec/key.h>
56#include <netipsec/keysock.h>
57#include <netipsec/key_debug.h>
58
59#include <machine/stdarg.h>
60
61struct key_cb {
62 int key_count;
63 int any_count;
64};
65static struct key_cb key_cb;
66
67static struct sockaddr key_dst = { 2, PF_KEY, };
68static struct sockaddr key_src = { 2, PF_KEY, };
69
70static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
71
72struct pfkeystat pfkeystat;
73
74/*
75 * key_output()
76 */
77int
78#if __STDC__
79key_output(struct mbuf *m, ...)
80#else
81key_output(m, va_alist)
82 struct mbuf *m;
83 va_dcl
84#endif
85{
86 struct sadb_msg *msg;
87 int len, error = 0;
88 int s;
89 struct socket *so;
90 va_list ap;
91
92 va_start(ap, m);
93 so = va_arg(ap, struct socket *);
94 va_end(ap);
95
96 if (m == 0)
97 panic("key_output: NULL pointer was passed.\n");
98
99 pfkeystat.out_total++;
100 pfkeystat.out_bytes += m->m_pkthdr.len;
101
102 len = m->m_pkthdr.len;
103 if (len < sizeof(struct sadb_msg)) {
104 pfkeystat.out_tooshort++;
105 error = EINVAL;
106 goto end;
107 }
108
109 if (m->m_len < sizeof(struct sadb_msg)) {
110 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
111 pfkeystat.out_nomem++;
112 error = ENOBUFS;
113 goto end;
114 }
115 }
116
| 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/malloc.h>
43#include <sys/mbuf.h>
44#include <sys/protosw.h>
45#include <sys/signalvar.h>
46#include <sys/socket.h>
47#include <sys/socketvar.h>
48#include <sys/sysctl.h>
49#include <sys/systm.h>
50
51#include <net/raw_cb.h>
52#include <net/route.h>
53
54#include <net/pfkeyv2.h>
55#include <netipsec/key.h>
56#include <netipsec/keysock.h>
57#include <netipsec/key_debug.h>
58
59#include <machine/stdarg.h>
60
61struct key_cb {
62 int key_count;
63 int any_count;
64};
65static struct key_cb key_cb;
66
67static struct sockaddr key_dst = { 2, PF_KEY, };
68static struct sockaddr key_src = { 2, PF_KEY, };
69
70static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
71
72struct pfkeystat pfkeystat;
73
74/*
75 * key_output()
76 */
77int
78#if __STDC__
79key_output(struct mbuf *m, ...)
80#else
81key_output(m, va_alist)
82 struct mbuf *m;
83 va_dcl
84#endif
85{
86 struct sadb_msg *msg;
87 int len, error = 0;
88 int s;
89 struct socket *so;
90 va_list ap;
91
92 va_start(ap, m);
93 so = va_arg(ap, struct socket *);
94 va_end(ap);
95
96 if (m == 0)
97 panic("key_output: NULL pointer was passed.\n");
98
99 pfkeystat.out_total++;
100 pfkeystat.out_bytes += m->m_pkthdr.len;
101
102 len = m->m_pkthdr.len;
103 if (len < sizeof(struct sadb_msg)) {
104 pfkeystat.out_tooshort++;
105 error = EINVAL;
106 goto end;
107 }
108
109 if (m->m_len < sizeof(struct sadb_msg)) {
110 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
111 pfkeystat.out_nomem++;
112 error = ENOBUFS;
113 goto end;
114 }
115 }
116
|
119
120 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
121
122 msg = mtod(m, struct sadb_msg *);
123 pfkeystat.out_msgtype[msg->sadb_msg_type]++;
124 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
125 pfkeystat.out_invlen++;
126 error = EINVAL;
127 goto end;
128 }
129
130 /*XXX giant lock*/
131 s = splnet();
132 error = key_parse(m, so);
133 m = NULL;
134 splx(s);
135end:
136 if (m)
137 m_freem(m);
138 return error;
139}
140
141/*
142 * send message to the socket.
143 */
144static int
145key_sendup0(rp, m, promisc)
146 struct rawcb *rp;
147 struct mbuf *m;
148 int promisc;
149{
150 int error;
151
152 if (promisc) {
153 struct sadb_msg *pmsg;
154
155 M_PREPEND(m, sizeof(struct sadb_msg), M_DONTWAIT);
156 if (m && m->m_len < sizeof(struct sadb_msg))
157 m = m_pullup(m, sizeof(struct sadb_msg));
158 if (!m) {
159 pfkeystat.in_nomem++;
160 m_freem(m);
161 return ENOBUFS;
162 }
163 m->m_pkthdr.len += sizeof(*pmsg);
164
165 pmsg = mtod(m, struct sadb_msg *);
166 bzero(pmsg, sizeof(*pmsg));
167 pmsg->sadb_msg_version = PF_KEY_V2;
168 pmsg->sadb_msg_type = SADB_X_PROMISC;
169 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
170 /* pid and seq? */
171
172 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
173 }
174
175 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
176 m, NULL)) {
177 pfkeystat.in_nomem++;
178 m_freem(m);
179 error = ENOBUFS;
180 } else
181 error = 0;
182 sorwakeup(rp->rcb_socket);
183 return error;
184}
185
186/* XXX this interface should be obsoleted. */
187int
188key_sendup(so, msg, len, target)
189 struct socket *so;
190 struct sadb_msg *msg;
191 u_int len;
192 int target; /*target of the resulting message*/
193{
194 struct mbuf *m, *n, *mprev;
195 int tlen;
196
197 /* sanity check */
198 if (so == 0 || msg == 0)
199 panic("key_sendup: NULL pointer was passed.\n");
200
201 KEYDEBUG(KEYDEBUG_KEY_DUMP,
202 printf("key_sendup: \n");
203 kdebug_sadb(msg));
204
205 /*
206 * we increment statistics here, just in case we have ENOBUFS
207 * in this function.
208 */
209 pfkeystat.in_total++;
210 pfkeystat.in_bytes += len;
211 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
212
213 /*
214 * Get mbuf chain whenever possible (not clusters),
215 * to save socket buffer. We'll be generating many SADB_ACQUIRE
216 * messages to listening key sockets. If we simply allocate clusters,
217 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
218 * sbspace() computes # of actual data bytes AND mbuf region.
219 *
220 * TODO: SADB_ACQUIRE filters should be implemented.
221 */
222 tlen = len;
223 m = mprev = NULL;
224 while (tlen > 0) {
225 if (tlen == len) {
226 MGETHDR(n, M_DONTWAIT, MT_DATA);
227 n->m_len = MHLEN;
228 } else {
229 MGET(n, M_DONTWAIT, MT_DATA);
230 n->m_len = MLEN;
231 }
232 if (!n) {
233 pfkeystat.in_nomem++;
234 return ENOBUFS;
235 }
236 if (tlen >= MCLBYTES) { /*XXX better threshold? */
237 MCLGET(n, M_DONTWAIT);
238 if ((n->m_flags & M_EXT) == 0) {
239 m_free(n);
240 m_freem(m);
241 pfkeystat.in_nomem++;
242 return ENOBUFS;
243 }
244 n->m_len = MCLBYTES;
245 }
246
247 if (tlen < n->m_len)
248 n->m_len = tlen;
249 n->m_next = NULL;
250 if (m == NULL)
251 m = mprev = n;
252 else {
253 mprev->m_next = n;
254 mprev = n;
255 }
256 tlen -= n->m_len;
257 n = NULL;
258 }
259 m->m_pkthdr.len = len;
260 m->m_pkthdr.rcvif = NULL;
261 m_copyback(m, 0, len, (caddr_t)msg);
262
263 /* avoid duplicated statistics */
264 pfkeystat.in_total--;
265 pfkeystat.in_bytes -= len;
266 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
267
268 return key_sendup_mbuf(so, m, target);
269}
270
271/* so can be NULL if target != KEY_SENDUP_ONE */
272int
273key_sendup_mbuf(so, m, target)
274 struct socket *so;
275 struct mbuf *m;
276 int target;
277{
278 struct mbuf *n;
279 struct keycb *kp;
280 int sendup;
281 struct rawcb *rp;
282 int error = 0;
283
284 if (m == NULL)
285 panic("key_sendup_mbuf: NULL pointer was passed.\n");
286 if (so == NULL && target == KEY_SENDUP_ONE)
287 panic("key_sendup_mbuf: NULL pointer was passed.\n");
288
289 pfkeystat.in_total++;
290 pfkeystat.in_bytes += m->m_pkthdr.len;
291 if (m->m_len < sizeof(struct sadb_msg)) {
292#if 1
293 m = m_pullup(m, sizeof(struct sadb_msg));
294 if (m == NULL) {
295 pfkeystat.in_nomem++;
296 return ENOBUFS;
297 }
298#else
299 /* don't bother pulling it up just for stats */
300#endif
301 }
302 if (m->m_len >= sizeof(struct sadb_msg)) {
303 struct sadb_msg *msg;
304 msg = mtod(m, struct sadb_msg *);
305 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
306 }
307
308 LIST_FOREACH(rp, &rawcb_list, list)
309 {
310 if (rp->rcb_proto.sp_family != PF_KEY)
311 continue;
312 if (rp->rcb_proto.sp_protocol
313 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
314 continue;
315 }
316
317 kp = (struct keycb *)rp;
318
319 /*
320 * If you are in promiscuous mode, and when you get broadcasted
321 * reply, you'll get two PF_KEY messages.
322 * (based on pf_key@inner.net message on 14 Oct 1998)
323 */
324 if (((struct keycb *)rp)->kp_promisc) {
325 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
326 (void)key_sendup0(rp, n, 1);
327 n = NULL;
328 }
329 }
330
331 /* the exact target will be processed later */
332 if (so && sotorawcb(so) == rp)
333 continue;
334
335 sendup = 0;
336 switch (target) {
337 case KEY_SENDUP_ONE:
338 /* the statement has no effect */
339 if (so && sotorawcb(so) == rp)
340 sendup++;
341 break;
342 case KEY_SENDUP_ALL:
343 sendup++;
344 break;
345 case KEY_SENDUP_REGISTERED:
346 if (kp->kp_registered)
347 sendup++;
348 break;
349 }
350 pfkeystat.in_msgtarget[target]++;
351
352 if (!sendup)
353 continue;
354
355 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
356 m_freem(m);
357 pfkeystat.in_nomem++;
358 return ENOBUFS;
359 }
360
361 if ((error = key_sendup0(rp, n, 0)) != 0) {
362 m_freem(m);
363 return error;
364 }
365
366 n = NULL;
367 }
368
369 if (so) {
370 error = key_sendup0(sotorawcb(so), m, 0);
371 m = NULL;
372 } else {
373 error = 0;
374 m_freem(m);
375 }
376 return error;
377}
378
379/*
380 * key_abort()
381 * derived from net/rtsock.c:rts_abort()
382 */
383static int
384key_abort(struct socket *so)
385{
386 int s, error;
387 s = splnet();
388 error = raw_usrreqs.pru_abort(so);
389 splx(s);
390 return error;
391}
392
393/*
394 * key_attach()
395 * derived from net/rtsock.c:rts_attach()
396 */
397static int
398key_attach(struct socket *so, int proto, struct thread *td)
399{
400 struct keycb *kp;
401 int s, error;
402
403 if (sotorawcb(so) != 0)
404 return EISCONN; /* XXX panic? */
405 kp = (struct keycb *)malloc(sizeof *kp, M_PCB, M_WAITOK|M_ZERO); /* XXX */
406 if (kp == 0)
407 return ENOBUFS;
408
409 /*
410 * The splnet() is necessary to block protocols from sending
411 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
412 * this PCB is extant but incompletely initialized.
413 * Probably we should try to do more of this work beforehand and
414 * eliminate the spl.
415 */
416 s = splnet();
417 so->so_pcb = (caddr_t)kp;
418 error = raw_usrreqs.pru_attach(so, proto, td);
419 kp = (struct keycb *)sotorawcb(so);
420 if (error) {
421 free(kp, M_PCB);
422 so->so_pcb = (caddr_t) 0;
423 splx(s);
424 return error;
425 }
426
427 kp->kp_promisc = kp->kp_registered = 0;
428
429 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
430 key_cb.key_count++;
431 key_cb.any_count++;
432 kp->kp_raw.rcb_laddr = &key_src;
433 kp->kp_raw.rcb_faddr = &key_dst;
434 soisconnected(so);
435 so->so_options |= SO_USELOOPBACK;
436
437 splx(s);
438 return 0;
439}
440
441/*
442 * key_bind()
443 * derived from net/rtsock.c:rts_bind()
444 */
445static int
446key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
447{
448 int s, error;
449 s = splnet();
450 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
451 splx(s);
452 return error;
453}
454
455/*
456 * key_connect()
457 * derived from net/rtsock.c:rts_connect()
458 */
459static int
460key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
461{
462 int s, error;
463 s = splnet();
464 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
465 splx(s);
466 return error;
467}
468
469/*
470 * key_detach()
471 * derived from net/rtsock.c:rts_detach()
472 */
473static int
474key_detach(struct socket *so)
475{
476 struct keycb *kp = (struct keycb *)sotorawcb(so);
477 int s, error;
478
479 s = splnet();
480 if (kp != 0) {
481 if (kp->kp_raw.rcb_proto.sp_protocol
482 == PF_KEY) /* XXX: AF_KEY */
483 key_cb.key_count--;
484 key_cb.any_count--;
485
486 key_freereg(so);
487 }
488 error = raw_usrreqs.pru_detach(so);
489 splx(s);
490 return error;
491}
492
493/*
494 * key_disconnect()
495 * derived from net/rtsock.c:key_disconnect()
496 */
497static int
498key_disconnect(struct socket *so)
499{
500 int s, error;
501 s = splnet();
502 error = raw_usrreqs.pru_disconnect(so);
503 splx(s);
504 return error;
505}
506
507/*
508 * key_peeraddr()
509 * derived from net/rtsock.c:rts_peeraddr()
510 */
511static int
512key_peeraddr(struct socket *so, struct sockaddr **nam)
513{
514 int s, error;
515 s = splnet();
516 error = raw_usrreqs.pru_peeraddr(so, nam);
517 splx(s);
518 return error;
519}
520
521/*
522 * key_send()
523 * derived from net/rtsock.c:rts_send()
524 */
525static int
526key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
527 struct mbuf *control, struct thread *td)
528{
529 int s, error;
530 s = splnet();
531 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
532 splx(s);
533 return error;
534}
535
536/*
537 * key_shutdown()
538 * derived from net/rtsock.c:rts_shutdown()
539 */
540static int
541key_shutdown(struct socket *so)
542{
543 int s, error;
544 s = splnet();
545 error = raw_usrreqs.pru_shutdown(so);
546 splx(s);
547 return error;
548}
549
550/*
551 * key_sockaddr()
552 * derived from net/rtsock.c:rts_sockaddr()
553 */
554static int
555key_sockaddr(struct socket *so, struct sockaddr **nam)
556{
557 int s, error;
558 s = splnet();
559 error = raw_usrreqs.pru_sockaddr(so, nam);
560 splx(s);
561 return error;
562}
563
564struct pr_usrreqs key_usrreqs = {
565 key_abort, pru_accept_notsupp, key_attach, key_bind,
566 key_connect,
567 pru_connect2_notsupp, pru_control_notsupp, key_detach,
568 key_disconnect, pru_listen_notsupp, key_peeraddr,
569 pru_rcvd_notsupp,
570 pru_rcvoob_notsupp, key_send, pru_sense_null, key_shutdown,
571 key_sockaddr, sosend, soreceive, sopoll
572};
573
574/* sysctl */
575SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
576
577/*
578 * Definitions of protocols supported in the KEY domain.
579 */
580
581extern struct domain keydomain;
582
583struct protosw keysw[] = {
584{ SOCK_RAW, &keydomain, PF_KEY_V2, PR_ATOMIC|PR_ADDR,
585 0, (pr_output_t *)key_output, raw_ctlinput, 0,
586 0,
587 raw_init, 0, 0, 0,
588 &key_usrreqs
589}
590};
591
592static void
593key_init0(void)
594{
595 bzero((caddr_t)&key_cb, sizeof(key_cb));
596 key_init();
597}
598
599struct domain keydomain =
600 { PF_KEY, "key", key_init0, 0, 0,
601 keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])] };
602
603DOMAIN_SET(key);
| 118
119 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
120
121 msg = mtod(m, struct sadb_msg *);
122 pfkeystat.out_msgtype[msg->sadb_msg_type]++;
123 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
124 pfkeystat.out_invlen++;
125 error = EINVAL;
126 goto end;
127 }
128
129 /*XXX giant lock*/
130 s = splnet();
131 error = key_parse(m, so);
132 m = NULL;
133 splx(s);
134end:
135 if (m)
136 m_freem(m);
137 return error;
138}
139
140/*
141 * send message to the socket.
142 */
143static int
144key_sendup0(rp, m, promisc)
145 struct rawcb *rp;
146 struct mbuf *m;
147 int promisc;
148{
149 int error;
150
151 if (promisc) {
152 struct sadb_msg *pmsg;
153
154 M_PREPEND(m, sizeof(struct sadb_msg), M_DONTWAIT);
155 if (m && m->m_len < sizeof(struct sadb_msg))
156 m = m_pullup(m, sizeof(struct sadb_msg));
157 if (!m) {
158 pfkeystat.in_nomem++;
159 m_freem(m);
160 return ENOBUFS;
161 }
162 m->m_pkthdr.len += sizeof(*pmsg);
163
164 pmsg = mtod(m, struct sadb_msg *);
165 bzero(pmsg, sizeof(*pmsg));
166 pmsg->sadb_msg_version = PF_KEY_V2;
167 pmsg->sadb_msg_type = SADB_X_PROMISC;
168 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
169 /* pid and seq? */
170
171 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
172 }
173
174 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
175 m, NULL)) {
176 pfkeystat.in_nomem++;
177 m_freem(m);
178 error = ENOBUFS;
179 } else
180 error = 0;
181 sorwakeup(rp->rcb_socket);
182 return error;
183}
184
185/* XXX this interface should be obsoleted. */
186int
187key_sendup(so, msg, len, target)
188 struct socket *so;
189 struct sadb_msg *msg;
190 u_int len;
191 int target; /*target of the resulting message*/
192{
193 struct mbuf *m, *n, *mprev;
194 int tlen;
195
196 /* sanity check */
197 if (so == 0 || msg == 0)
198 panic("key_sendup: NULL pointer was passed.\n");
199
200 KEYDEBUG(KEYDEBUG_KEY_DUMP,
201 printf("key_sendup: \n");
202 kdebug_sadb(msg));
203
204 /*
205 * we increment statistics here, just in case we have ENOBUFS
206 * in this function.
207 */
208 pfkeystat.in_total++;
209 pfkeystat.in_bytes += len;
210 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
211
212 /*
213 * Get mbuf chain whenever possible (not clusters),
214 * to save socket buffer. We'll be generating many SADB_ACQUIRE
215 * messages to listening key sockets. If we simply allocate clusters,
216 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
217 * sbspace() computes # of actual data bytes AND mbuf region.
218 *
219 * TODO: SADB_ACQUIRE filters should be implemented.
220 */
221 tlen = len;
222 m = mprev = NULL;
223 while (tlen > 0) {
224 if (tlen == len) {
225 MGETHDR(n, M_DONTWAIT, MT_DATA);
226 n->m_len = MHLEN;
227 } else {
228 MGET(n, M_DONTWAIT, MT_DATA);
229 n->m_len = MLEN;
230 }
231 if (!n) {
232 pfkeystat.in_nomem++;
233 return ENOBUFS;
234 }
235 if (tlen >= MCLBYTES) { /*XXX better threshold? */
236 MCLGET(n, M_DONTWAIT);
237 if ((n->m_flags & M_EXT) == 0) {
238 m_free(n);
239 m_freem(m);
240 pfkeystat.in_nomem++;
241 return ENOBUFS;
242 }
243 n->m_len = MCLBYTES;
244 }
245
246 if (tlen < n->m_len)
247 n->m_len = tlen;
248 n->m_next = NULL;
249 if (m == NULL)
250 m = mprev = n;
251 else {
252 mprev->m_next = n;
253 mprev = n;
254 }
255 tlen -= n->m_len;
256 n = NULL;
257 }
258 m->m_pkthdr.len = len;
259 m->m_pkthdr.rcvif = NULL;
260 m_copyback(m, 0, len, (caddr_t)msg);
261
262 /* avoid duplicated statistics */
263 pfkeystat.in_total--;
264 pfkeystat.in_bytes -= len;
265 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
266
267 return key_sendup_mbuf(so, m, target);
268}
269
270/* so can be NULL if target != KEY_SENDUP_ONE */
271int
272key_sendup_mbuf(so, m, target)
273 struct socket *so;
274 struct mbuf *m;
275 int target;
276{
277 struct mbuf *n;
278 struct keycb *kp;
279 int sendup;
280 struct rawcb *rp;
281 int error = 0;
282
283 if (m == NULL)
284 panic("key_sendup_mbuf: NULL pointer was passed.\n");
285 if (so == NULL && target == KEY_SENDUP_ONE)
286 panic("key_sendup_mbuf: NULL pointer was passed.\n");
287
288 pfkeystat.in_total++;
289 pfkeystat.in_bytes += m->m_pkthdr.len;
290 if (m->m_len < sizeof(struct sadb_msg)) {
291#if 1
292 m = m_pullup(m, sizeof(struct sadb_msg));
293 if (m == NULL) {
294 pfkeystat.in_nomem++;
295 return ENOBUFS;
296 }
297#else
298 /* don't bother pulling it up just for stats */
299#endif
300 }
301 if (m->m_len >= sizeof(struct sadb_msg)) {
302 struct sadb_msg *msg;
303 msg = mtod(m, struct sadb_msg *);
304 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
305 }
306
307 LIST_FOREACH(rp, &rawcb_list, list)
308 {
309 if (rp->rcb_proto.sp_family != PF_KEY)
310 continue;
311 if (rp->rcb_proto.sp_protocol
312 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
313 continue;
314 }
315
316 kp = (struct keycb *)rp;
317
318 /*
319 * If you are in promiscuous mode, and when you get broadcasted
320 * reply, you'll get two PF_KEY messages.
321 * (based on pf_key@inner.net message on 14 Oct 1998)
322 */
323 if (((struct keycb *)rp)->kp_promisc) {
324 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
325 (void)key_sendup0(rp, n, 1);
326 n = NULL;
327 }
328 }
329
330 /* the exact target will be processed later */
331 if (so && sotorawcb(so) == rp)
332 continue;
333
334 sendup = 0;
335 switch (target) {
336 case KEY_SENDUP_ONE:
337 /* the statement has no effect */
338 if (so && sotorawcb(so) == rp)
339 sendup++;
340 break;
341 case KEY_SENDUP_ALL:
342 sendup++;
343 break;
344 case KEY_SENDUP_REGISTERED:
345 if (kp->kp_registered)
346 sendup++;
347 break;
348 }
349 pfkeystat.in_msgtarget[target]++;
350
351 if (!sendup)
352 continue;
353
354 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
355 m_freem(m);
356 pfkeystat.in_nomem++;
357 return ENOBUFS;
358 }
359
360 if ((error = key_sendup0(rp, n, 0)) != 0) {
361 m_freem(m);
362 return error;
363 }
364
365 n = NULL;
366 }
367
368 if (so) {
369 error = key_sendup0(sotorawcb(so), m, 0);
370 m = NULL;
371 } else {
372 error = 0;
373 m_freem(m);
374 }
375 return error;
376}
377
378/*
379 * key_abort()
380 * derived from net/rtsock.c:rts_abort()
381 */
382static int
383key_abort(struct socket *so)
384{
385 int s, error;
386 s = splnet();
387 error = raw_usrreqs.pru_abort(so);
388 splx(s);
389 return error;
390}
391
392/*
393 * key_attach()
394 * derived from net/rtsock.c:rts_attach()
395 */
396static int
397key_attach(struct socket *so, int proto, struct thread *td)
398{
399 struct keycb *kp;
400 int s, error;
401
402 if (sotorawcb(so) != 0)
403 return EISCONN; /* XXX panic? */
404 kp = (struct keycb *)malloc(sizeof *kp, M_PCB, M_WAITOK|M_ZERO); /* XXX */
405 if (kp == 0)
406 return ENOBUFS;
407
408 /*
409 * The splnet() is necessary to block protocols from sending
410 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
411 * this PCB is extant but incompletely initialized.
412 * Probably we should try to do more of this work beforehand and
413 * eliminate the spl.
414 */
415 s = splnet();
416 so->so_pcb = (caddr_t)kp;
417 error = raw_usrreqs.pru_attach(so, proto, td);
418 kp = (struct keycb *)sotorawcb(so);
419 if (error) {
420 free(kp, M_PCB);
421 so->so_pcb = (caddr_t) 0;
422 splx(s);
423 return error;
424 }
425
426 kp->kp_promisc = kp->kp_registered = 0;
427
428 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
429 key_cb.key_count++;
430 key_cb.any_count++;
431 kp->kp_raw.rcb_laddr = &key_src;
432 kp->kp_raw.rcb_faddr = &key_dst;
433 soisconnected(so);
434 so->so_options |= SO_USELOOPBACK;
435
436 splx(s);
437 return 0;
438}
439
440/*
441 * key_bind()
442 * derived from net/rtsock.c:rts_bind()
443 */
444static int
445key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
446{
447 int s, error;
448 s = splnet();
449 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
450 splx(s);
451 return error;
452}
453
454/*
455 * key_connect()
456 * derived from net/rtsock.c:rts_connect()
457 */
458static int
459key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
460{
461 int s, error;
462 s = splnet();
463 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
464 splx(s);
465 return error;
466}
467
468/*
469 * key_detach()
470 * derived from net/rtsock.c:rts_detach()
471 */
472static int
473key_detach(struct socket *so)
474{
475 struct keycb *kp = (struct keycb *)sotorawcb(so);
476 int s, error;
477
478 s = splnet();
479 if (kp != 0) {
480 if (kp->kp_raw.rcb_proto.sp_protocol
481 == PF_KEY) /* XXX: AF_KEY */
482 key_cb.key_count--;
483 key_cb.any_count--;
484
485 key_freereg(so);
486 }
487 error = raw_usrreqs.pru_detach(so);
488 splx(s);
489 return error;
490}
491
492/*
493 * key_disconnect()
494 * derived from net/rtsock.c:key_disconnect()
495 */
496static int
497key_disconnect(struct socket *so)
498{
499 int s, error;
500 s = splnet();
501 error = raw_usrreqs.pru_disconnect(so);
502 splx(s);
503 return error;
504}
505
506/*
507 * key_peeraddr()
508 * derived from net/rtsock.c:rts_peeraddr()
509 */
510static int
511key_peeraddr(struct socket *so, struct sockaddr **nam)
512{
513 int s, error;
514 s = splnet();
515 error = raw_usrreqs.pru_peeraddr(so, nam);
516 splx(s);
517 return error;
518}
519
520/*
521 * key_send()
522 * derived from net/rtsock.c:rts_send()
523 */
524static int
525key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
526 struct mbuf *control, struct thread *td)
527{
528 int s, error;
529 s = splnet();
530 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
531 splx(s);
532 return error;
533}
534
535/*
536 * key_shutdown()
537 * derived from net/rtsock.c:rts_shutdown()
538 */
539static int
540key_shutdown(struct socket *so)
541{
542 int s, error;
543 s = splnet();
544 error = raw_usrreqs.pru_shutdown(so);
545 splx(s);
546 return error;
547}
548
549/*
550 * key_sockaddr()
551 * derived from net/rtsock.c:rts_sockaddr()
552 */
553static int
554key_sockaddr(struct socket *so, struct sockaddr **nam)
555{
556 int s, error;
557 s = splnet();
558 error = raw_usrreqs.pru_sockaddr(so, nam);
559 splx(s);
560 return error;
561}
562
563struct pr_usrreqs key_usrreqs = {
564 key_abort, pru_accept_notsupp, key_attach, key_bind,
565 key_connect,
566 pru_connect2_notsupp, pru_control_notsupp, key_detach,
567 key_disconnect, pru_listen_notsupp, key_peeraddr,
568 pru_rcvd_notsupp,
569 pru_rcvoob_notsupp, key_send, pru_sense_null, key_shutdown,
570 key_sockaddr, sosend, soreceive, sopoll
571};
572
573/* sysctl */
574SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
575
576/*
577 * Definitions of protocols supported in the KEY domain.
578 */
579
580extern struct domain keydomain;
581
582struct protosw keysw[] = {
583{ SOCK_RAW, &keydomain, PF_KEY_V2, PR_ATOMIC|PR_ADDR,
584 0, (pr_output_t *)key_output, raw_ctlinput, 0,
585 0,
586 raw_init, 0, 0, 0,
587 &key_usrreqs
588}
589};
590
591static void
592key_init0(void)
593{
594 bzero((caddr_t)&key_cb, sizeof(key_cb));
595 key_init();
596}
597
598struct domain keydomain =
599 { PF_KEY, "key", key_init0, 0, 0,
600 keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])] };
601
602DOMAIN_SET(key);
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