1/* $FreeBSD: head/sys/netipsec/keysock.c 252028 2013-06-20 11:44:16Z ae $ */
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/priv.h>
47#include <sys/protosw.h>
48#include <sys/signalvar.h>
49#include <sys/socket.h>
50#include <sys/socketvar.h>
51#include <sys/sysctl.h>
52#include <sys/systm.h>
53
54#include <net/if.h>
55#include <net/raw_cb.h>
56#include <net/route.h>
57#include <net/vnet.h>
58
59#include <netinet/in.h>
60
61#include <net/pfkeyv2.h>
62#include <netipsec/key.h>
63#include <netipsec/keysock.h>
64#include <netipsec/key_debug.h>
65#include <netipsec/ipsec.h>
66
67#include <machine/stdarg.h>
68
69struct key_cb {
70 int key_count;
71 int any_count;
72};
73static VNET_DEFINE(struct key_cb, key_cb);
74#define V_key_cb VNET(key_cb)
75
76static struct sockaddr key_src = { 2, PF_KEY, };
77
78static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
79
80VNET_DEFINE(struct pfkeystat, pfkeystat);
81
82/*
83 * key_output()
84 */
85int
86key_output(struct mbuf *m, struct socket *so)
87{
88 struct sadb_msg *msg;
89 int len, error = 0;
90
91 if (m == 0)
92 panic("%s: NULL pointer was passed.\n", __func__);
93
94 PFKEYSTAT_INC(out_total);
95 PFKEYSTAT_ADD(out_bytes, m->m_pkthdr.len);
96
97 len = m->m_pkthdr.len;
98 if (len < sizeof(struct sadb_msg)) {
99 PFKEYSTAT_INC(out_tooshort);
100 error = EINVAL;
101 goto end;
102 }
103
104 if (m->m_len < sizeof(struct sadb_msg)) {
105 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
106 PFKEYSTAT_INC(out_nomem);
107 error = ENOBUFS;
108 goto end;
109 }
110 }
111
112 M_ASSERTPKTHDR(m);
113
114 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
115
116 msg = mtod(m, struct sadb_msg *);
117 PFKEYSTAT_INC(out_msgtype[msg->sadb_msg_type]);
118 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
119 PFKEYSTAT_INC(out_invlen);
120 error = EINVAL;
121 goto end;
122 }
123
124 error = key_parse(m, so);
125 m = NULL;
126end:
127 if (m)
128 m_freem(m);
129 return error;
130}
131
132/*
133 * send message to the socket.
134 */
135static int
136key_sendup0(rp, m, promisc)
137 struct rawcb *rp;
138 struct mbuf *m;
139 int promisc;
140{
141 int error;
142
143 if (promisc) {
144 struct sadb_msg *pmsg;
145
146 M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
147 if (m && m->m_len < sizeof(struct sadb_msg))
148 m = m_pullup(m, sizeof(struct sadb_msg));
149 if (!m) {
150 PFKEYSTAT_INC(in_nomem);
151 m_freem(m);
152 return ENOBUFS;
153 }
154 m->m_pkthdr.len += sizeof(*pmsg);
155
156 pmsg = mtod(m, struct sadb_msg *);
157 bzero(pmsg, sizeof(*pmsg));
158 pmsg->sadb_msg_version = PF_KEY_V2;
159 pmsg->sadb_msg_type = SADB_X_PROMISC;
160 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
161 /* pid and seq? */
162
163 PFKEYSTAT_INC(in_msgtype[pmsg->sadb_msg_type]);
164 }
165
166 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
167 m, NULL)) {
168 PFKEYSTAT_INC(in_nomem);
169 m_freem(m);
170 error = ENOBUFS;
171 } else
172 error = 0;
173 sorwakeup(rp->rcb_socket);
174 return error;
175}
176
177/* XXX this interface should be obsoleted. */
178int
179key_sendup(so, msg, len, target)
180 struct socket *so;
181 struct sadb_msg *msg;
182 u_int len;
183 int target; /*target of the resulting message*/
184{
185 struct mbuf *m, *n, *mprev;
186 int tlen;
187
188 /* sanity check */
189 if (so == 0 || msg == 0)
190 panic("%s: NULL pointer was passed.\n", __func__);
191
192 KEYDEBUG(KEYDEBUG_KEY_DUMP,
193 printf("%s: \n", __func__);
194 kdebug_sadb(msg));
195
196 /*
197 * we increment statistics here, just in case we have ENOBUFS
198 * in this function.
199 */
200 PFKEYSTAT_INC(in_total);
201 PFKEYSTAT_ADD(in_bytes, len);
202 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
203
204 /*
205 * Get mbuf chain whenever possible (not clusters),
206 * to save socket buffer. We'll be generating many SADB_ACQUIRE
207 * messages to listening key sockets. If we simply allocate clusters,
208 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
209 * sbspace() computes # of actual data bytes AND mbuf region.
210 *
211 * TODO: SADB_ACQUIRE filters should be implemented.
212 */
213 tlen = len;
214 m = mprev = NULL;
215 while (tlen > 0) {
216 if (tlen == len) {
217 MGETHDR(n, M_NOWAIT, MT_DATA);
218 if (n == NULL) {
219 PFKEYSTAT_INC(in_nomem);
220 return ENOBUFS;
221 }
222 n->m_len = MHLEN;
223 } else {
224 MGET(n, M_NOWAIT, MT_DATA);
225 if (n == NULL) {
226 PFKEYSTAT_INC(in_nomem);
227 return ENOBUFS;
228 }
229 n->m_len = MLEN;
230 }
231 if (tlen >= MCLBYTES) { /*XXX better threshold? */
232 MCLGET(n, M_NOWAIT);
233 if ((n->m_flags & M_EXT) == 0) {
234 m_free(n);
235 m_freem(m);
236 PFKEYSTAT_INC(in_nomem);
237 return ENOBUFS;
238 }
239 n->m_len = MCLBYTES;
240 }
241
242 if (tlen < n->m_len)
243 n->m_len = tlen;
244 n->m_next = NULL;
245 if (m == NULL)
246 m = mprev = n;
247 else {
248 mprev->m_next = n;
249 mprev = n;
250 }
251 tlen -= n->m_len;
252 n = NULL;
253 }
254 m->m_pkthdr.len = len;
255 m->m_pkthdr.rcvif = NULL;
256 m_copyback(m, 0, len, (caddr_t)msg);
257
258 /* avoid duplicated statistics */
259 PFKEYSTAT_ADD(in_total, -1);
260 PFKEYSTAT_ADD(in_bytes, -len);
261 PFKEYSTAT_ADD(in_msgtype[msg->sadb_msg_type], -1);
262
263 return key_sendup_mbuf(so, m, target);
264}
265
266/* so can be NULL if target != KEY_SENDUP_ONE */
267int
268key_sendup_mbuf(so, m, target)
269 struct socket *so;
270 struct mbuf *m;
271 int target;
272{
273 struct mbuf *n;
274 struct keycb *kp;
275 int sendup;
276 struct rawcb *rp;
277 int error = 0;
278
279 if (m == NULL)
280 panic("key_sendup_mbuf: NULL pointer was passed.\n");
281 if (so == NULL && target == KEY_SENDUP_ONE)
282 panic("%s: NULL pointer was passed.\n", __func__);
283
284 PFKEYSTAT_INC(in_total);
285 PFKEYSTAT_ADD(in_bytes, m->m_pkthdr.len);
286 if (m->m_len < sizeof(struct sadb_msg)) {
287 m = m_pullup(m, sizeof(struct sadb_msg));
288 if (m == NULL) {
289 PFKEYSTAT_INC(in_nomem);
290 return ENOBUFS;
291 }
292 }
293 if (m->m_len >= sizeof(struct sadb_msg)) {
294 struct sadb_msg *msg;
295 msg = mtod(m, struct sadb_msg *);
296 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
297 }
298 mtx_lock(&rawcb_mtx);
299 LIST_FOREACH(rp, &V_rawcb_list, list)
300 {
301 if (rp->rcb_proto.sp_family != PF_KEY)
302 continue;
303 if (rp->rcb_proto.sp_protocol
304 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
305 continue;
306 }
307
308 kp = (struct keycb *)rp;
309
310 /*
311 * If you are in promiscuous mode, and when you get broadcasted
312 * reply, you'll get two PF_KEY messages.
313 * (based on pf_key@inner.net message on 14 Oct 1998)
314 */
315 if (((struct keycb *)rp)->kp_promisc) {
316 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
317 (void)key_sendup0(rp, n, 1);
318 n = NULL;
319 }
320 }
321
322 /* the exact target will be processed later */
323 if (so && sotorawcb(so) == rp)
324 continue;
325
326 sendup = 0;
327 switch (target) {
328 case KEY_SENDUP_ONE:
329 /* the statement has no effect */
330 if (so && sotorawcb(so) == rp)
331 sendup++;
332 break;
333 case KEY_SENDUP_ALL:
334 sendup++;
335 break;
336 case KEY_SENDUP_REGISTERED:
337 if (kp->kp_registered)
338 sendup++;
339 break;
340 }
341 PFKEYSTAT_INC(in_msgtarget[target]);
342
343 if (!sendup)
344 continue;
345
346 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
347 m_freem(m);
348 PFKEYSTAT_INC(in_nomem);
349 mtx_unlock(&rawcb_mtx);
350 return ENOBUFS;
351 }
352
353 if ((error = key_sendup0(rp, n, 0)) != 0) {
354 m_freem(m);
355 mtx_unlock(&rawcb_mtx);
356 return error;
357 }
358
359 n = NULL;
360 }
361
362 if (so) {
363 error = key_sendup0(sotorawcb(so), m, 0);
364 m = NULL;
365 } else {
366 error = 0;
367 m_freem(m);
368 }
369 mtx_unlock(&rawcb_mtx);
370 return error;
371}
372
373/*
374 * key_abort()
375 * derived from net/rtsock.c:rts_abort()
376 */
377static void
378key_abort(struct socket *so)
379{
380 raw_usrreqs.pru_abort(so);
381}
382
383/*
384 * key_attach()
385 * derived from net/rtsock.c:rts_attach()
386 */
387static int
388key_attach(struct socket *so, int proto, struct thread *td)
389{
390 struct keycb *kp;
391 int error;
392
393 KASSERT(so->so_pcb == NULL, ("key_attach: so_pcb != NULL"));
394
395 if (td != NULL) {
396 error = priv_check(td, PRIV_NET_RAW);
397 if (error)
398 return error;
399 }
400
401 /* XXX */
402 kp = malloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
403 if (kp == 0)
404 return ENOBUFS;
405
406 so->so_pcb = (caddr_t)kp;
407 error = raw_attach(so, proto);
408 kp = (struct keycb *)sotorawcb(so);
409 if (error) {
410 free(kp, M_PCB);
411 so->so_pcb = (caddr_t) 0;
412 return error;
413 }
414
415 kp->kp_promisc = kp->kp_registered = 0;
416
417 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
418 V_key_cb.key_count++;
419 V_key_cb.any_count++;
420 soisconnected(so);
421 so->so_options |= SO_USELOOPBACK;
422
423 return 0;
424}
425
426/*
427 * key_bind()
428 * derived from net/rtsock.c:rts_bind()
429 */
430static int
431key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
432{
433 return EINVAL;
434}
435
436/*
437 * key_close()
438 * derived from net/rtsock.c:rts_close().
439 */
440static void
441key_close(struct socket *so)
442{
443
444 raw_usrreqs.pru_close(so);
445}
446
447/*
448 * key_connect()
449 * derived from net/rtsock.c:rts_connect()
450 */
451static int
452key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
453{
454 return EINVAL;
455}
456
457/*
458 * key_detach()
459 * derived from net/rtsock.c:rts_detach()
460 */
461static void
462key_detach(struct socket *so)
463{
464 struct keycb *kp = (struct keycb *)sotorawcb(so);
465
466 KASSERT(kp != NULL, ("key_detach: kp == NULL"));
467 if (kp->kp_raw.rcb_proto.sp_protocol
468 == PF_KEY) /* XXX: AF_KEY */
469 V_key_cb.key_count--;
470 V_key_cb.any_count--;
471
472 key_freereg(so);
473 raw_usrreqs.pru_detach(so);
474}
475
476/*
477 * key_disconnect()
478 * derived from net/rtsock.c:key_disconnect()
479 */
480static int
481key_disconnect(struct socket *so)
482{
483 return(raw_usrreqs.pru_disconnect(so));
484}
485
486/*
487 * key_peeraddr()
488 * derived from net/rtsock.c:rts_peeraddr()
489 */
490static int
491key_peeraddr(struct socket *so, struct sockaddr **nam)
492{
493 return(raw_usrreqs.pru_peeraddr(so, nam));
494}
495
496/*
497 * key_send()
498 * derived from net/rtsock.c:rts_send()
499 */
500static int
501key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
502 struct mbuf *control, struct thread *td)
503{
504 return(raw_usrreqs.pru_send(so, flags, m, nam, control, td));
505}
506
507/*
508 * key_shutdown()
509 * derived from net/rtsock.c:rts_shutdown()
510 */
511static int
512key_shutdown(struct socket *so)
513{
514 return(raw_usrreqs.pru_shutdown(so));
515}
516
517/*
518 * key_sockaddr()
519 * derived from net/rtsock.c:rts_sockaddr()
520 */
521static int
522key_sockaddr(struct socket *so, struct sockaddr **nam)
523{
524 return(raw_usrreqs.pru_sockaddr(so, nam));
525}
526
527struct pr_usrreqs key_usrreqs = {
528 .pru_abort = key_abort,
529 .pru_attach = key_attach,
530 .pru_bind = key_bind,
531 .pru_connect = key_connect,
532 .pru_detach = key_detach,
533 .pru_disconnect = key_disconnect,
534 .pru_peeraddr = key_peeraddr,
535 .pru_send = key_send,
536 .pru_shutdown = key_shutdown,
537 .pru_sockaddr = key_sockaddr,
538 .pru_close = key_close,
539};
540
541/* sysctl */
542SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
543
544/*
545 * Definitions of protocols supported in the KEY domain.
546 */
547
548extern struct domain keydomain;
549
550struct protosw keysw[] = {
551{
552 .pr_type = SOCK_RAW,
553 .pr_domain = &keydomain,
554 .pr_protocol = PF_KEY_V2,
555 .pr_flags = PR_ATOMIC|PR_ADDR,
556 .pr_output = key_output,
557 .pr_ctlinput = raw_ctlinput,
558 .pr_init = raw_init,
559 .pr_usrreqs = &key_usrreqs
560}
561};
562
563static void
564key_init0(void)
565{
566
567 bzero((caddr_t)&V_key_cb, sizeof(V_key_cb));
568 key_init();
569}
570
571struct domain keydomain = {
572 .dom_family = PF_KEY,
573 .dom_name = "key",
574 .dom_init = key_init0,
575#ifdef VIMAGE
576 .dom_destroy = key_destroy,
577#endif
578 .dom_protosw = keysw,
579 .dom_protoswNPROTOSW = &keysw[sizeof(keysw)/sizeof(keysw[0])]
580};
581
582VNET_DOMAIN_SET(key);
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/priv.h>
47#include <sys/protosw.h>
48#include <sys/signalvar.h>
49#include <sys/socket.h>
50#include <sys/socketvar.h>
51#include <sys/sysctl.h>
52#include <sys/systm.h>
53
54#include <net/if.h>
55#include <net/raw_cb.h>
56#include <net/route.h>
57#include <net/vnet.h>
58
59#include <netinet/in.h>
60
61#include <net/pfkeyv2.h>
62#include <netipsec/key.h>
63#include <netipsec/keysock.h>
64#include <netipsec/key_debug.h>
65#include <netipsec/ipsec.h>
66
67#include <machine/stdarg.h>
68
69struct key_cb {
70 int key_count;
71 int any_count;
72};
73static VNET_DEFINE(struct key_cb, key_cb);
74#define V_key_cb VNET(key_cb)
75
76static struct sockaddr key_src = { 2, PF_KEY, };
77
78static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
79
80VNET_DEFINE(struct pfkeystat, pfkeystat);
81
82/*
83 * key_output()
84 */
85int
86key_output(struct mbuf *m, struct socket *so)
87{
88 struct sadb_msg *msg;
89 int len, error = 0;
90
91 if (m == 0)
92 panic("%s: NULL pointer was passed.\n", __func__);
93
94 PFKEYSTAT_INC(out_total);
95 PFKEYSTAT_ADD(out_bytes, m->m_pkthdr.len);
96
97 len = m->m_pkthdr.len;
98 if (len < sizeof(struct sadb_msg)) {
99 PFKEYSTAT_INC(out_tooshort);
100 error = EINVAL;
101 goto end;
102 }
103
104 if (m->m_len < sizeof(struct sadb_msg)) {
105 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
106 PFKEYSTAT_INC(out_nomem);
107 error = ENOBUFS;
108 goto end;
109 }
110 }
111
112 M_ASSERTPKTHDR(m);
113
114 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
115
116 msg = mtod(m, struct sadb_msg *);
117 PFKEYSTAT_INC(out_msgtype[msg->sadb_msg_type]);
118 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
119 PFKEYSTAT_INC(out_invlen);
120 error = EINVAL;
121 goto end;
122 }
123
124 error = key_parse(m, so);
125 m = NULL;
126end:
127 if (m)
128 m_freem(m);
129 return error;
130}
131
132/*
133 * send message to the socket.
134 */
135static int
136key_sendup0(rp, m, promisc)
137 struct rawcb *rp;
138 struct mbuf *m;
139 int promisc;
140{
141 int error;
142
143 if (promisc) {
144 struct sadb_msg *pmsg;
145
146 M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
147 if (m && m->m_len < sizeof(struct sadb_msg))
148 m = m_pullup(m, sizeof(struct sadb_msg));
149 if (!m) {
150 PFKEYSTAT_INC(in_nomem);
151 m_freem(m);
152 return ENOBUFS;
153 }
154 m->m_pkthdr.len += sizeof(*pmsg);
155
156 pmsg = mtod(m, struct sadb_msg *);
157 bzero(pmsg, sizeof(*pmsg));
158 pmsg->sadb_msg_version = PF_KEY_V2;
159 pmsg->sadb_msg_type = SADB_X_PROMISC;
160 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
161 /* pid and seq? */
162
163 PFKEYSTAT_INC(in_msgtype[pmsg->sadb_msg_type]);
164 }
165
166 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
167 m, NULL)) {
168 PFKEYSTAT_INC(in_nomem);
169 m_freem(m);
170 error = ENOBUFS;
171 } else
172 error = 0;
173 sorwakeup(rp->rcb_socket);
174 return error;
175}
176
177/* XXX this interface should be obsoleted. */
178int
179key_sendup(so, msg, len, target)
180 struct socket *so;
181 struct sadb_msg *msg;
182 u_int len;
183 int target; /*target of the resulting message*/
184{
185 struct mbuf *m, *n, *mprev;
186 int tlen;
187
188 /* sanity check */
189 if (so == 0 || msg == 0)
190 panic("%s: NULL pointer was passed.\n", __func__);
191
192 KEYDEBUG(KEYDEBUG_KEY_DUMP,
193 printf("%s: \n", __func__);
194 kdebug_sadb(msg));
195
196 /*
197 * we increment statistics here, just in case we have ENOBUFS
198 * in this function.
199 */
200 PFKEYSTAT_INC(in_total);
201 PFKEYSTAT_ADD(in_bytes, len);
202 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
203
204 /*
205 * Get mbuf chain whenever possible (not clusters),
206 * to save socket buffer. We'll be generating many SADB_ACQUIRE
207 * messages to listening key sockets. If we simply allocate clusters,
208 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
209 * sbspace() computes # of actual data bytes AND mbuf region.
210 *
211 * TODO: SADB_ACQUIRE filters should be implemented.
212 */
213 tlen = len;
214 m = mprev = NULL;
215 while (tlen > 0) {
216 if (tlen == len) {
217 MGETHDR(n, M_NOWAIT, MT_DATA);
218 if (n == NULL) {
219 PFKEYSTAT_INC(in_nomem);
220 return ENOBUFS;
221 }
222 n->m_len = MHLEN;
223 } else {
224 MGET(n, M_NOWAIT, MT_DATA);
225 if (n == NULL) {
226 PFKEYSTAT_INC(in_nomem);
227 return ENOBUFS;
228 }
229 n->m_len = MLEN;
230 }
231 if (tlen >= MCLBYTES) { /*XXX better threshold? */
232 MCLGET(n, M_NOWAIT);
233 if ((n->m_flags & M_EXT) == 0) {
234 m_free(n);
235 m_freem(m);
236 PFKEYSTAT_INC(in_nomem);
237 return ENOBUFS;
238 }
239 n->m_len = MCLBYTES;
240 }
241
242 if (tlen < n->m_len)
243 n->m_len = tlen;
244 n->m_next = NULL;
245 if (m == NULL)
246 m = mprev = n;
247 else {
248 mprev->m_next = n;
249 mprev = n;
250 }
251 tlen -= n->m_len;
252 n = NULL;
253 }
254 m->m_pkthdr.len = len;
255 m->m_pkthdr.rcvif = NULL;
256 m_copyback(m, 0, len, (caddr_t)msg);
257
258 /* avoid duplicated statistics */
259 PFKEYSTAT_ADD(in_total, -1);
260 PFKEYSTAT_ADD(in_bytes, -len);
261 PFKEYSTAT_ADD(in_msgtype[msg->sadb_msg_type], -1);
262
263 return key_sendup_mbuf(so, m, target);
264}
265
266/* so can be NULL if target != KEY_SENDUP_ONE */
267int
268key_sendup_mbuf(so, m, target)
269 struct socket *so;
270 struct mbuf *m;
271 int target;
272{
273 struct mbuf *n;
274 struct keycb *kp;
275 int sendup;
276 struct rawcb *rp;
277 int error = 0;
278
279 if (m == NULL)
280 panic("key_sendup_mbuf: NULL pointer was passed.\n");
281 if (so == NULL && target == KEY_SENDUP_ONE)
282 panic("%s: NULL pointer was passed.\n", __func__);
283
284 PFKEYSTAT_INC(in_total);
285 PFKEYSTAT_ADD(in_bytes, m->m_pkthdr.len);
286 if (m->m_len < sizeof(struct sadb_msg)) {
287 m = m_pullup(m, sizeof(struct sadb_msg));
288 if (m == NULL) {
289 PFKEYSTAT_INC(in_nomem);
290 return ENOBUFS;
291 }
292 }
293 if (m->m_len >= sizeof(struct sadb_msg)) {
294 struct sadb_msg *msg;
295 msg = mtod(m, struct sadb_msg *);
296 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
297 }
298 mtx_lock(&rawcb_mtx);
299 LIST_FOREACH(rp, &V_rawcb_list, list)
300 {
301 if (rp->rcb_proto.sp_family != PF_KEY)
302 continue;
303 if (rp->rcb_proto.sp_protocol
304 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
305 continue;
306 }
307
308 kp = (struct keycb *)rp;
309
310 /*
311 * If you are in promiscuous mode, and when you get broadcasted
312 * reply, you'll get two PF_KEY messages.
313 * (based on pf_key@inner.net message on 14 Oct 1998)
314 */
315 if (((struct keycb *)rp)->kp_promisc) {
316 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
317 (void)key_sendup0(rp, n, 1);
318 n = NULL;
319 }
320 }
321
322 /* the exact target will be processed later */
323 if (so && sotorawcb(so) == rp)
324 continue;
325
326 sendup = 0;
327 switch (target) {
328 case KEY_SENDUP_ONE:
329 /* the statement has no effect */
330 if (so && sotorawcb(so) == rp)
331 sendup++;
332 break;
333 case KEY_SENDUP_ALL:
334 sendup++;
335 break;
336 case KEY_SENDUP_REGISTERED:
337 if (kp->kp_registered)
338 sendup++;
339 break;
340 }
341 PFKEYSTAT_INC(in_msgtarget[target]);
342
343 if (!sendup)
344 continue;
345
346 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
347 m_freem(m);
348 PFKEYSTAT_INC(in_nomem);
349 mtx_unlock(&rawcb_mtx);
350 return ENOBUFS;
351 }
352
353 if ((error = key_sendup0(rp, n, 0)) != 0) {
354 m_freem(m);
355 mtx_unlock(&rawcb_mtx);
356 return error;
357 }
358
359 n = NULL;
360 }
361
362 if (so) {
363 error = key_sendup0(sotorawcb(so), m, 0);
364 m = NULL;
365 } else {
366 error = 0;
367 m_freem(m);
368 }
369 mtx_unlock(&rawcb_mtx);
370 return error;
371}
372
373/*
374 * key_abort()
375 * derived from net/rtsock.c:rts_abort()
376 */
377static void
378key_abort(struct socket *so)
379{
380 raw_usrreqs.pru_abort(so);
381}
382
383/*
384 * key_attach()
385 * derived from net/rtsock.c:rts_attach()
386 */
387static int
388key_attach(struct socket *so, int proto, struct thread *td)
389{
390 struct keycb *kp;
391 int error;
392
393 KASSERT(so->so_pcb == NULL, ("key_attach: so_pcb != NULL"));
394
395 if (td != NULL) {
396 error = priv_check(td, PRIV_NET_RAW);
397 if (error)
398 return error;
399 }
400
401 /* XXX */
402 kp = malloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
403 if (kp == 0)
404 return ENOBUFS;
405
406 so->so_pcb = (caddr_t)kp;
407 error = raw_attach(so, proto);
408 kp = (struct keycb *)sotorawcb(so);
409 if (error) {
410 free(kp, M_PCB);
411 so->so_pcb = (caddr_t) 0;
412 return error;
413 }
414
415 kp->kp_promisc = kp->kp_registered = 0;
416
417 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
418 V_key_cb.key_count++;
419 V_key_cb.any_count++;
420 soisconnected(so);
421 so->so_options |= SO_USELOOPBACK;
422
423 return 0;
424}
425
426/*
427 * key_bind()
428 * derived from net/rtsock.c:rts_bind()
429 */
430static int
431key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
432{
433 return EINVAL;
434}
435
436/*
437 * key_close()
438 * derived from net/rtsock.c:rts_close().
439 */
440static void
441key_close(struct socket *so)
442{
443
444 raw_usrreqs.pru_close(so);
445}
446
447/*
448 * key_connect()
449 * derived from net/rtsock.c:rts_connect()
450 */
451static int
452key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
453{
454 return EINVAL;
455}
456
457/*
458 * key_detach()
459 * derived from net/rtsock.c:rts_detach()
460 */
461static void
462key_detach(struct socket *so)
463{
464 struct keycb *kp = (struct keycb *)sotorawcb(so);
465
466 KASSERT(kp != NULL, ("key_detach: kp == NULL"));
467 if (kp->kp_raw.rcb_proto.sp_protocol
468 == PF_KEY) /* XXX: AF_KEY */
469 V_key_cb.key_count--;
470 V_key_cb.any_count--;
471
472 key_freereg(so);
473 raw_usrreqs.pru_detach(so);
474}
475
476/*
477 * key_disconnect()
478 * derived from net/rtsock.c:key_disconnect()
479 */
480static int
481key_disconnect(struct socket *so)
482{
483 return(raw_usrreqs.pru_disconnect(so));
484}
485
486/*
487 * key_peeraddr()
488 * derived from net/rtsock.c:rts_peeraddr()
489 */
490static int
491key_peeraddr(struct socket *so, struct sockaddr **nam)
492{
493 return(raw_usrreqs.pru_peeraddr(so, nam));
494}
495
496/*
497 * key_send()
498 * derived from net/rtsock.c:rts_send()
499 */
500static int
501key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
502 struct mbuf *control, struct thread *td)
503{
504 return(raw_usrreqs.pru_send(so, flags, m, nam, control, td));
505}
506
507/*
508 * key_shutdown()
509 * derived from net/rtsock.c:rts_shutdown()
510 */
511static int
512key_shutdown(struct socket *so)
513{
514 return(raw_usrreqs.pru_shutdown(so));
515}
516
517/*
518 * key_sockaddr()
519 * derived from net/rtsock.c:rts_sockaddr()
520 */
521static int
522key_sockaddr(struct socket *so, struct sockaddr **nam)
523{
524 return(raw_usrreqs.pru_sockaddr(so, nam));
525}
526
527struct pr_usrreqs key_usrreqs = {
528 .pru_abort = key_abort,
529 .pru_attach = key_attach,
530 .pru_bind = key_bind,
531 .pru_connect = key_connect,
532 .pru_detach = key_detach,
533 .pru_disconnect = key_disconnect,
534 .pru_peeraddr = key_peeraddr,
535 .pru_send = key_send,
536 .pru_shutdown = key_shutdown,
537 .pru_sockaddr = key_sockaddr,
538 .pru_close = key_close,
539};
540
541/* sysctl */
542SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
543
544/*
545 * Definitions of protocols supported in the KEY domain.
546 */
547
548extern struct domain keydomain;
549
550struct protosw keysw[] = {
551{
552 .pr_type = SOCK_RAW,
553 .pr_domain = &keydomain,
554 .pr_protocol = PF_KEY_V2,
555 .pr_flags = PR_ATOMIC|PR_ADDR,
556 .pr_output = key_output,
557 .pr_ctlinput = raw_ctlinput,
558 .pr_init = raw_init,
559 .pr_usrreqs = &key_usrreqs
560}
561};
562
563static void
564key_init0(void)
565{
566
567 bzero((caddr_t)&V_key_cb, sizeof(V_key_cb));
568 key_init();
569}
570
571struct domain keydomain = {
572 .dom_family = PF_KEY,
573 .dom_name = "key",
574 .dom_init = key_init0,
575#ifdef VIMAGE
576 .dom_destroy = key_destroy,
577#endif
578 .dom_protosw = keysw,
579 .dom_protoswNPROTOSW = &keysw[sizeof(keysw)/sizeof(keysw[0])]
580};
581
582VNET_DOMAIN_SET(key);