1 /* $FreeBSD: src/sys/netipsec/keysock.c,v 1.3.2.1 2003/01/24 05:11:36 sam Exp $ */
2 /* $DragonFly: src/sys/netproto/ipsec/keysock.c,v 1.18 2008/01/06 16:55:52 swildner Exp $ */
3 /* $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $ */
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "opt_ipsec.h"
36 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <sys/domain.h>
41 #include <sys/errno.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
45 #include <sys/protosw.h>
46 #include <sys/signalvar.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/sysctl.h>
50 #include <sys/systm.h>
51 #include <sys/thread2.h>
53 #include <net/raw_cb.h>
54 #include <net/route.h>
56 #include <net/pfkeyv2.h>
57 #include <netproto/ipsec/key.h>
58 #include <netproto/ipsec/keysock.h>
59 #include <netproto/ipsec/key_debug.h>
61 #include <machine/stdarg.h>
63 typedef int pr_output_t (struct mbuf *, struct socket *);
69 static struct key_cb key_cb;
71 static struct sockaddr key_dst = { 2, PF_KEY, };
72 static struct sockaddr key_src = { 2, PF_KEY, };
74 static int key_sendup0 (struct rawcb *, struct mbuf *, int);
76 struct pfkeystat pfkeystat;
82 key_output(struct mbuf *m, struct socket *so, ...)
89 panic("key_output: NULL pointer was passed.\n");
91 pfkeystat.out_total++;
92 pfkeystat.out_bytes += m->m_pkthdr.len;
94 len = m->m_pkthdr.len;
95 if (len < sizeof(struct sadb_msg)) {
96 pfkeystat.out_tooshort++;
101 if (m->m_len < sizeof(struct sadb_msg)) {
102 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
103 pfkeystat.out_nomem++;
109 if ((m->m_flags & M_PKTHDR) == 0)
110 panic("key_output: not M_PKTHDR ??");
112 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
114 msg = mtod(m, struct sadb_msg *);
115 pfkeystat.out_msgtype[msg->sadb_msg_type]++;
116 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
117 pfkeystat.out_invlen++;
124 error = key_parse(m, so);
134 * send message to the socket.
137 key_sendup0(struct rawcb *rp, struct mbuf *m, int promisc)
142 struct sadb_msg *pmsg;
144 M_PREPEND(m, sizeof(struct sadb_msg), MB_DONTWAIT);
145 if (m && m->m_len < sizeof(struct sadb_msg))
146 m = m_pullup(m, sizeof(struct sadb_msg));
148 pfkeystat.in_nomem++;
152 m->m_pkthdr.len += sizeof(*pmsg);
154 pmsg = mtod(m, struct sadb_msg *);
155 bzero(pmsg, sizeof(*pmsg));
156 pmsg->sadb_msg_version = PF_KEY_V2;
157 pmsg->sadb_msg_type = SADB_X_PROMISC;
158 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
161 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
164 if (!ssb_appendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
166 pfkeystat.in_nomem++;
171 sorwakeup(rp->rcb_socket);
176 * XXX this interface should be obsoleted.
179 * target: target of the resulting message
182 key_sendup(struct socket *so, struct sadb_msg *msg, u_int len, int target)
184 struct mbuf *m, *n, *mprev;
188 if (so == 0 || msg == 0)
189 panic("key_sendup: NULL pointer was passed.\n");
191 KEYDEBUG(KEYDEBUG_KEY_DUMP,
192 kprintf("key_sendup: \n");
196 * we increment statistics here, just in case we have ENOBUFS
199 pfkeystat.in_total++;
200 pfkeystat.in_bytes += len;
201 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
204 * Get mbuf chain whenever possible (not clusters),
205 * to save socket buffer. We'll be generating many SADB_ACQUIRE
206 * messages to listening key sockets. If we simply allocate clusters,
207 * ssb_appendaddr() will raise ENOBUFS due to too little ssb_space().
208 * ssb_space() computes # of actual data bytes AND mbuf region.
210 * TODO: SADB_ACQUIRE filters should be implemented.
217 n = m_getl(tlen, MB_DONTWAIT, MT_DATA,
218 (tlen == len) ? M_PKTHDR : 0, &nsize);
221 pfkeystat.in_nomem++;
224 n->m_len = (tlen < n->m_len) ? tlen : nsize;
234 m->m_pkthdr.len = len;
235 m_copyback(m, 0, len, (caddr_t)msg);
237 /* avoid duplicated statistics */
238 pfkeystat.in_total--;
239 pfkeystat.in_bytes -= len;
240 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
242 return key_sendup_mbuf(so, m, target);
245 /* so can be NULL if target != KEY_SENDUP_ONE */
247 key_sendup_mbuf(struct socket *so, struct mbuf *m, int target)
256 panic("key_sendup_mbuf: NULL pointer was passed.\n");
257 if (so == NULL && target == KEY_SENDUP_ONE)
258 panic("key_sendup_mbuf: NULL pointer was passed.\n");
260 pfkeystat.in_total++;
261 pfkeystat.in_bytes += m->m_pkthdr.len;
262 if (m->m_len < sizeof(struct sadb_msg)) {
264 m = m_pullup(m, sizeof(struct sadb_msg));
266 pfkeystat.in_nomem++;
270 /* don't bother pulling it up just for stats */
273 if (m->m_len >= sizeof(struct sadb_msg)) {
274 struct sadb_msg *msg;
275 msg = mtod(m, struct sadb_msg *);
276 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
279 LIST_FOREACH(rp, &rawcb_list, list)
281 if (rp->rcb_proto.sp_family != PF_KEY)
283 if (rp->rcb_proto.sp_protocol
284 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
288 kp = (struct keycb *)rp;
291 * If you are in promiscuous mode, and when you get broadcasted
292 * reply, you'll get two PF_KEY messages.
293 * (based on pf_key@inner.net message on 14 Oct 1998)
295 if (((struct keycb *)rp)->kp_promisc) {
296 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
297 key_sendup0(rp, n, 1);
302 /* the exact target will be processed later */
303 if (so && sotorawcb(so) == rp)
309 /* the statement has no effect */
310 if (so && sotorawcb(so) == rp)
316 case KEY_SENDUP_REGISTERED:
317 if (kp->kp_registered)
321 pfkeystat.in_msgtarget[target]++;
326 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
328 pfkeystat.in_nomem++;
332 if ((error = key_sendup0(rp, n, 0)) != 0) {
341 error = key_sendup0(sotorawcb(so), m, 0);
352 * derived from net/rtsock.c:rts_abort()
355 key_abort(struct socket *so)
359 error = raw_usrreqs.pru_abort(so);
366 * derived from net/rtsock.c:rts_attach()
369 key_attach(struct socket *so, int proto, struct pru_attach_info *ai)
374 if (sotorawcb(so) != 0)
375 return EISCONN; /* XXX panic? */
376 kp = (struct keycb *)kmalloc(sizeof *kp, M_PCB, M_WAITOK|M_ZERO); /* XXX */
379 * The critical section is necessary to block protocols from sending
380 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
381 * this PCB is extant but incompletely initialized.
382 * Probably we should try to do more of this work beforehand and
386 so->so_pcb = (caddr_t)kp;
387 error = raw_usrreqs.pru_attach(so, proto, ai);
388 kp = (struct keycb *)sotorawcb(so);
391 so->so_pcb = (caddr_t) 0;
396 kp->kp_promisc = kp->kp_registered = 0;
398 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
401 kp->kp_raw.rcb_laddr = &key_src;
402 kp->kp_raw.rcb_faddr = &key_dst;
404 so->so_options |= SO_USELOOPBACK;
412 * derived from net/rtsock.c:rts_bind()
415 key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
419 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
426 * derived from net/rtsock.c:rts_connect()
429 key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
433 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
440 * derived from net/rtsock.c:rts_detach()
443 key_detach(struct socket *so)
445 struct keycb *kp = (struct keycb *)sotorawcb(so);
450 if (kp->kp_raw.rcb_proto.sp_protocol
451 == PF_KEY) /* XXX: AF_KEY */
457 error = raw_usrreqs.pru_detach(so);
464 * derived from net/rtsock.c:key_disconnect()
467 key_disconnect(struct socket *so)
471 error = raw_usrreqs.pru_disconnect(so);
478 * derived from net/rtsock.c:rts_peeraddr()
481 key_peeraddr(struct socket *so, struct sockaddr **nam)
485 error = raw_usrreqs.pru_peeraddr(so, nam);
492 * derived from net/rtsock.c:rts_send()
495 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
496 struct mbuf *control, struct thread *td)
500 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
507 * derived from net/rtsock.c:rts_shutdown()
510 key_shutdown(struct socket *so)
514 error = raw_usrreqs.pru_shutdown(so);
521 * derived from net/rtsock.c:rts_sockaddr()
524 key_sockaddr(struct socket *so, struct sockaddr **nam)
528 error = raw_usrreqs.pru_sockaddr(so, nam);
533 struct pr_usrreqs key_usrreqs = {
534 .pru_abort = key_abort,
535 .pru_accept = pru_accept_notsupp,
536 .pru_attach = key_attach,
537 .pru_bind = key_bind,
538 .pru_connect = key_connect,
539 .pru_connect2 = pru_connect2_notsupp,
540 .pru_control = pru_control_notsupp,
541 .pru_detach = key_detach,
542 .pru_disconnect = key_disconnect,
543 .pru_listen = pru_listen_notsupp,
544 .pru_peeraddr = key_peeraddr,
545 .pru_rcvd = pru_rcvd_notsupp,
546 .pru_rcvoob = pru_rcvoob_notsupp,
547 .pru_send = key_send,
548 .pru_sense = pru_sense_null,
549 .pru_shutdown = key_shutdown,
550 .pru_sockaddr = key_sockaddr,
551 .pru_sosend = sosend,
552 .pru_soreceive = soreceive,
557 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
560 * Definitions of protocols supported in the KEY domain.
563 extern struct domain keydomain;
565 struct protosw keysw[] = {
566 { SOCK_RAW, &keydomain, PF_KEY_V2, PR_ATOMIC|PR_ADDR,
567 0, key_output, raw_ctlinput, 0,
577 bzero((caddr_t)&key_cb, sizeof(key_cb));
581 struct domain keydomain = {
582 PF_KEY, "key", key_init0, NULL, NULL,
583 keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])],