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_DEFINE(struct pfkeystat, pfkeystat);
86 key_output(struct mbuf *m, struct socket *so)
92 panic("%s: NULL pointer was passed.\n", __func__);
94 PFKEYSTAT_INC(out_total);
95 PFKEYSTAT_ADD(out_bytes, m->m_pkthdr.len);
97 len = m->m_pkthdr.len;
98 if (len < sizeof(struct sadb_msg)) {
99 PFKEYSTAT_INC(out_tooshort);
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);
114 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
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);
124 error = key_parse(m, so);
133 * send message to the socket.
136 key_sendup0(rp, m, promisc)
144 struct sadb_msg *pmsg;
146 M_PREPEND(m, sizeof(struct sadb_msg), M_DONTWAIT);
148 PFKEYSTAT_INC(in_nomem);
151 pmsg = mtod(m, struct sadb_msg *);
152 bzero(pmsg, sizeof(*pmsg));
153 pmsg->sadb_msg_version = PF_KEY_V2;
154 pmsg->sadb_msg_type = SADB_X_PROMISC;
155 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
158 PFKEYSTAT_INC(in_msgtype[pmsg->sadb_msg_type]);
161 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
163 PFKEYSTAT_INC(in_nomem);
168 sorwakeup(rp->rcb_socket);
172 /* XXX this interface should be obsoleted. */
174 key_sendup(so, msg, len, target)
176 struct sadb_msg *msg;
178 int target; /*target of the resulting message*/
180 struct mbuf *m, *n, *mprev;
184 if (so == 0 || msg == 0)
185 panic("%s: NULL pointer was passed.\n", __func__);
187 KEYDEBUG(KEYDEBUG_KEY_DUMP,
188 printf("%s: \n", __func__);
192 * we increment statistics here, just in case we have ENOBUFS
195 PFKEYSTAT_INC(in_total);
196 PFKEYSTAT_ADD(in_bytes, len);
197 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
200 * Get mbuf chain whenever possible (not clusters),
201 * to save socket buffer. We'll be generating many SADB_ACQUIRE
202 * messages to listening key sockets. If we simply allocate clusters,
203 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
204 * sbspace() computes # of actual data bytes AND mbuf region.
206 * TODO: SADB_ACQUIRE filters should be implemented.
212 MGETHDR(n, M_DONTWAIT, MT_DATA);
214 PFKEYSTAT_INC(in_nomem);
219 MGET(n, M_DONTWAIT, MT_DATA);
221 PFKEYSTAT_INC(in_nomem);
226 if (tlen >= MCLBYTES) { /*XXX better threshold? */
227 MCLGET(n, M_DONTWAIT);
228 if ((n->m_flags & M_EXT) == 0) {
231 PFKEYSTAT_INC(in_nomem);
249 m->m_pkthdr.len = len;
250 m->m_pkthdr.rcvif = NULL;
251 m_copyback(m, 0, len, (caddr_t)msg);
253 /* avoid duplicated statistics */
254 PFKEYSTAT_ADD(in_total, -1);
255 PFKEYSTAT_ADD(in_bytes, -len);
256 PFKEYSTAT_ADD(in_msgtype[msg->sadb_msg_type], -1);
258 return key_sendup_mbuf(so, m, target);
261 /* so can be NULL if target != KEY_SENDUP_ONE */
263 key_sendup_mbuf(so, m, target)
275 panic("key_sendup_mbuf: NULL pointer was passed.\n");
276 if (so == NULL && target == KEY_SENDUP_ONE)
277 panic("%s: NULL pointer was passed.\n", __func__);
279 PFKEYSTAT_INC(in_total);
280 PFKEYSTAT_ADD(in_bytes, m->m_pkthdr.len);
281 if (m->m_len < sizeof(struct sadb_msg)) {
282 m = m_pullup(m, sizeof(struct sadb_msg));
284 PFKEYSTAT_INC(in_nomem);
288 if (m->m_len >= sizeof(struct sadb_msg)) {
289 struct sadb_msg *msg;
290 msg = mtod(m, struct sadb_msg *);
291 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
293 mtx_lock(&rawcb_mtx);
294 LIST_FOREACH(rp, &V_rawcb_list, list)
296 if (rp->rcb_proto.sp_family != PF_KEY)
298 if (rp->rcb_proto.sp_protocol
299 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
303 kp = (struct keycb *)rp;
306 * If you are in promiscuous mode, and when you get broadcasted
307 * reply, you'll get two PF_KEY messages.
308 * (based on pf_key@inner.net message on 14 Oct 1998)
310 if (((struct keycb *)rp)->kp_promisc) {
311 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
312 (void)key_sendup0(rp, n, 1);
317 /* the exact target will be processed later */
318 if (so && sotorawcb(so) == rp)
324 /* the statement has no effect */
325 if (so && sotorawcb(so) == rp)
331 case KEY_SENDUP_REGISTERED:
332 if (kp->kp_registered)
336 PFKEYSTAT_INC(in_msgtarget[target]);
341 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
343 PFKEYSTAT_INC(in_nomem);
344 mtx_unlock(&rawcb_mtx);
348 if ((error = key_sendup0(rp, n, 0)) != 0) {
350 mtx_unlock(&rawcb_mtx);
358 error = key_sendup0(sotorawcb(so), m, 0);
364 mtx_unlock(&rawcb_mtx);
370 * derived from net/rtsock.c:rts_abort()
373 key_abort(struct socket *so)
375 raw_usrreqs.pru_abort(so);
380 * derived from net/rtsock.c:rts_attach()
383 key_attach(struct socket *so, int proto, struct thread *td)
388 KASSERT(so->so_pcb == NULL, ("key_attach: so_pcb != NULL"));
391 error = priv_check(td, PRIV_NET_RAW);
397 kp = malloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
401 so->so_pcb = (caddr_t)kp;
402 error = raw_attach(so, proto);
403 kp = (struct keycb *)sotorawcb(so);
406 so->so_pcb = (caddr_t) 0;
410 kp->kp_promisc = kp->kp_registered = 0;
412 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
413 V_key_cb.key_count++;
414 V_key_cb.any_count++;
416 so->so_options |= SO_USELOOPBACK;
423 * derived from net/rtsock.c:rts_bind()
426 key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
433 * derived from net/rtsock.c:rts_close().
436 key_close(struct socket *so)
439 raw_usrreqs.pru_close(so);
444 * derived from net/rtsock.c:rts_connect()
447 key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
454 * derived from net/rtsock.c:rts_detach()
457 key_detach(struct socket *so)
459 struct keycb *kp = (struct keycb *)sotorawcb(so);
461 KASSERT(kp != NULL, ("key_detach: kp == NULL"));
462 if (kp->kp_raw.rcb_proto.sp_protocol
463 == PF_KEY) /* XXX: AF_KEY */
464 V_key_cb.key_count--;
465 V_key_cb.any_count--;
468 raw_usrreqs.pru_detach(so);
473 * derived from net/rtsock.c:key_disconnect()
476 key_disconnect(struct socket *so)
478 return(raw_usrreqs.pru_disconnect(so));
483 * derived from net/rtsock.c:rts_peeraddr()
486 key_peeraddr(struct socket *so, struct sockaddr **nam)
488 return(raw_usrreqs.pru_peeraddr(so, nam));
493 * derived from net/rtsock.c:rts_send()
496 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
497 struct mbuf *control, struct thread *td)
499 return(raw_usrreqs.pru_send(so, flags, m, nam, control, td));
504 * derived from net/rtsock.c:rts_shutdown()
507 key_shutdown(struct socket *so)
509 return(raw_usrreqs.pru_shutdown(so));
514 * derived from net/rtsock.c:rts_sockaddr()
517 key_sockaddr(struct socket *so, struct sockaddr **nam)
519 return(raw_usrreqs.pru_sockaddr(so, nam));
522 struct pr_usrreqs key_usrreqs = {
523 .pru_abort = key_abort,
524 .pru_attach = key_attach,
525 .pru_bind = key_bind,
526 .pru_connect = key_connect,
527 .pru_detach = key_detach,
528 .pru_disconnect = key_disconnect,
529 .pru_peeraddr = key_peeraddr,
530 .pru_send = key_send,
531 .pru_shutdown = key_shutdown,
532 .pru_sockaddr = key_sockaddr,
533 .pru_close = key_close,
537 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
540 * Definitions of protocols supported in the KEY domain.
543 extern struct domain keydomain;
545 struct protosw keysw[] = {
548 .pr_domain = &keydomain,
549 .pr_protocol = PF_KEY_V2,
550 .pr_flags = PR_ATOMIC|PR_ADDR,
551 .pr_output = key_output,
552 .pr_ctlinput = raw_ctlinput,
554 .pr_usrreqs = &key_usrreqs
562 bzero((caddr_t)&V_key_cb, sizeof(V_key_cb));
566 struct domain keydomain = {
567 .dom_family = PF_KEY,
569 .dom_init = key_init0,
571 .dom_destroy = key_destroy,
573 .dom_protosw = keysw,
574 .dom_protoswNPROTOSW = &keysw[sizeof(keysw)/sizeof(keysw[0])]
577 VNET_DOMAIN_SET(key);