2 /* $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
33 #include "opt_ipsec.h"
35 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
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>
43 #include <sys/malloc.h>
45 #include <sys/mutex.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>
55 #include <net/raw_cb.h>
56 #include <net/route.h>
59 #include <netinet/in.h>
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>
67 #include <machine/stdarg.h>
73 static VNET_DEFINE(struct key_cb, key_cb);
74 #define V_key_cb VNET(key_cb)
76 static struct sockaddr key_src = { 2, PF_KEY, };
78 static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
80 VNET_PCPUSTAT_DEFINE(struct pfkeystat, pfkeystat);
81 VNET_PCPUSTAT_SYSINIT(pfkeystat);
84 VNET_PCPUSTAT_SYSUNINIT(pfkeystat);
91 key_output(struct mbuf *m, struct socket *so)
97 panic("%s: NULL pointer was passed.\n", __func__);
99 PFKEYSTAT_INC(out_total);
100 PFKEYSTAT_ADD(out_bytes, m->m_pkthdr.len);
102 len = m->m_pkthdr.len;
103 if (len < sizeof(struct sadb_msg)) {
104 PFKEYSTAT_INC(out_tooshort);
109 if (m->m_len < sizeof(struct sadb_msg)) {
110 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
111 PFKEYSTAT_INC(out_nomem);
119 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
121 msg = mtod(m, struct sadb_msg *);
122 PFKEYSTAT_INC(out_msgtype[msg->sadb_msg_type]);
123 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
124 PFKEYSTAT_INC(out_invlen);
129 error = key_parse(m, so);
138 * send message to the socket.
141 key_sendup0(rp, m, promisc)
149 struct sadb_msg *pmsg;
151 M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
152 if (m && m->m_len < sizeof(struct sadb_msg))
153 m = m_pullup(m, sizeof(struct sadb_msg));
155 PFKEYSTAT_INC(in_nomem);
159 m->m_pkthdr.len += sizeof(*pmsg);
161 pmsg = mtod(m, struct sadb_msg *);
162 bzero(pmsg, sizeof(*pmsg));
163 pmsg->sadb_msg_version = PF_KEY_V2;
164 pmsg->sadb_msg_type = SADB_X_PROMISC;
165 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
168 PFKEYSTAT_INC(in_msgtype[pmsg->sadb_msg_type]);
171 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
173 PFKEYSTAT_INC(in_nomem);
178 sorwakeup(rp->rcb_socket);
182 /* XXX this interface should be obsoleted. */
184 key_sendup(so, msg, len, target)
186 struct sadb_msg *msg;
188 int target; /*target of the resulting message*/
190 struct mbuf *m, *n, *mprev;
194 if (so == 0 || msg == 0)
195 panic("%s: NULL pointer was passed.\n", __func__);
197 KEYDEBUG(KEYDEBUG_KEY_DUMP,
198 printf("%s: \n", __func__);
202 * we increment statistics here, just in case we have ENOBUFS
205 PFKEYSTAT_INC(in_total);
206 PFKEYSTAT_ADD(in_bytes, len);
207 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
210 * Get mbuf chain whenever possible (not clusters),
211 * to save socket buffer. We'll be generating many SADB_ACQUIRE
212 * messages to listening key sockets. If we simply allocate clusters,
213 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
214 * sbspace() computes # of actual data bytes AND mbuf region.
216 * TODO: SADB_ACQUIRE filters should be implemented.
222 MGETHDR(n, M_NOWAIT, MT_DATA);
224 PFKEYSTAT_INC(in_nomem);
229 MGET(n, M_NOWAIT, MT_DATA);
231 PFKEYSTAT_INC(in_nomem);
236 if (tlen >= MCLBYTES) { /*XXX better threshold? */
238 if ((n->m_flags & M_EXT) == 0) {
241 PFKEYSTAT_INC(in_nomem);
259 m->m_pkthdr.len = len;
260 m->m_pkthdr.rcvif = NULL;
261 m_copyback(m, 0, len, (caddr_t)msg);
263 /* avoid duplicated statistics */
264 PFKEYSTAT_ADD(in_total, -1);
265 PFKEYSTAT_ADD(in_bytes, -len);
266 PFKEYSTAT_ADD(in_msgtype[msg->sadb_msg_type], -1);
268 return key_sendup_mbuf(so, m, target);
271 /* so can be NULL if target != KEY_SENDUP_ONE */
273 key_sendup_mbuf(so, m, target)
285 panic("key_sendup_mbuf: NULL pointer was passed.\n");
286 if (so == NULL && target == KEY_SENDUP_ONE)
287 panic("%s: NULL pointer was passed.\n", __func__);
289 PFKEYSTAT_INC(in_total);
290 PFKEYSTAT_ADD(in_bytes, m->m_pkthdr.len);
291 if (m->m_len < sizeof(struct sadb_msg)) {
292 m = m_pullup(m, sizeof(struct sadb_msg));
294 PFKEYSTAT_INC(in_nomem);
298 if (m->m_len >= sizeof(struct sadb_msg)) {
299 struct sadb_msg *msg;
300 msg = mtod(m, struct sadb_msg *);
301 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
303 mtx_lock(&rawcb_mtx);
304 LIST_FOREACH(rp, &V_rawcb_list, list)
306 if (rp->rcb_proto.sp_family != PF_KEY)
308 if (rp->rcb_proto.sp_protocol
309 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
313 kp = (struct keycb *)rp;
316 * If you are in promiscuous mode, and when you get broadcasted
317 * reply, you'll get two PF_KEY messages.
318 * (based on pf_key@inner.net message on 14 Oct 1998)
320 if (((struct keycb *)rp)->kp_promisc) {
321 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
322 (void)key_sendup0(rp, n, 1);
327 /* the exact target will be processed later */
328 if (so && sotorawcb(so) == rp)
334 /* the statement has no effect */
335 if (so && sotorawcb(so) == rp)
341 case KEY_SENDUP_REGISTERED:
342 if (kp->kp_registered)
346 PFKEYSTAT_INC(in_msgtarget[target]);
351 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
353 PFKEYSTAT_INC(in_nomem);
354 mtx_unlock(&rawcb_mtx);
358 if ((error = key_sendup0(rp, n, 0)) != 0) {
360 mtx_unlock(&rawcb_mtx);
368 error = key_sendup0(sotorawcb(so), m, 0);
374 mtx_unlock(&rawcb_mtx);
380 * derived from net/rtsock.c:rts_abort()
383 key_abort(struct socket *so)
385 raw_usrreqs.pru_abort(so);
390 * derived from net/rtsock.c:rts_attach()
393 key_attach(struct socket *so, int proto, struct thread *td)
398 KASSERT(so->so_pcb == NULL, ("key_attach: so_pcb != NULL"));
401 error = priv_check(td, PRIV_NET_RAW);
407 kp = malloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
411 so->so_pcb = (caddr_t)kp;
412 error = raw_attach(so, proto);
413 kp = (struct keycb *)sotorawcb(so);
416 so->so_pcb = (caddr_t) 0;
420 kp->kp_promisc = kp->kp_registered = 0;
422 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
423 V_key_cb.key_count++;
424 V_key_cb.any_count++;
426 so->so_options |= SO_USELOOPBACK;
433 * derived from net/rtsock.c:rts_bind()
436 key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
443 * derived from net/rtsock.c:rts_close().
446 key_close(struct socket *so)
449 raw_usrreqs.pru_close(so);
454 * derived from net/rtsock.c:rts_connect()
457 key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
464 * derived from net/rtsock.c:rts_detach()
467 key_detach(struct socket *so)
469 struct keycb *kp = (struct keycb *)sotorawcb(so);
471 KASSERT(kp != NULL, ("key_detach: kp == NULL"));
472 if (kp->kp_raw.rcb_proto.sp_protocol
473 == PF_KEY) /* XXX: AF_KEY */
474 V_key_cb.key_count--;
475 V_key_cb.any_count--;
478 raw_usrreqs.pru_detach(so);
483 * derived from net/rtsock.c:key_disconnect()
486 key_disconnect(struct socket *so)
488 return(raw_usrreqs.pru_disconnect(so));
493 * derived from net/rtsock.c:rts_peeraddr()
496 key_peeraddr(struct socket *so, struct sockaddr **nam)
498 return(raw_usrreqs.pru_peeraddr(so, nam));
503 * derived from net/rtsock.c:rts_send()
506 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
507 struct mbuf *control, struct thread *td)
509 return(raw_usrreqs.pru_send(so, flags, m, nam, control, td));
514 * derived from net/rtsock.c:rts_shutdown()
517 key_shutdown(struct socket *so)
519 return(raw_usrreqs.pru_shutdown(so));
524 * derived from net/rtsock.c:rts_sockaddr()
527 key_sockaddr(struct socket *so, struct sockaddr **nam)
529 return(raw_usrreqs.pru_sockaddr(so, nam));
532 struct pr_usrreqs key_usrreqs = {
533 .pru_abort = key_abort,
534 .pru_attach = key_attach,
535 .pru_bind = key_bind,
536 .pru_connect = key_connect,
537 .pru_detach = key_detach,
538 .pru_disconnect = key_disconnect,
539 .pru_peeraddr = key_peeraddr,
540 .pru_send = key_send,
541 .pru_shutdown = key_shutdown,
542 .pru_sockaddr = key_sockaddr,
543 .pru_close = key_close,
547 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
550 * Definitions of protocols supported in the KEY domain.
553 extern struct domain keydomain;
555 struct protosw keysw[] = {
558 .pr_domain = &keydomain,
559 .pr_protocol = PF_KEY_V2,
560 .pr_flags = PR_ATOMIC|PR_ADDR,
561 .pr_output = key_output,
562 .pr_ctlinput = raw_ctlinput,
564 .pr_usrreqs = &key_usrreqs
572 bzero((caddr_t)&V_key_cb, sizeof(V_key_cb));
576 struct domain keydomain = {
577 .dom_family = PF_KEY,
579 .dom_init = key_init0,
581 .dom_destroy = key_destroy,
583 .dom_protosw = keysw,
584 .dom_protoswNPROTOSW = &keysw[sizeof(keysw)/sizeof(keysw[0])]
587 VNET_DOMAIN_SET(key);