2 /* $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $ */
5 * SPDX-License-Identifier: BSD-3-Clause
7 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include "opt_ipsec.h"
37 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
39 #include <sys/types.h>
40 #include <sys/param.h>
41 #include <sys/domain.h>
42 #include <sys/errno.h>
43 #include <sys/kernel.h>
45 #include <sys/malloc.h>
47 #include <sys/mutex.h>
49 #include <sys/protosw.h>
50 #include <sys/signalvar.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/sysctl.h>
54 #include <sys/systm.h>
58 #include <net/raw_cb.h>
60 #include <netinet/in.h>
62 #include <net/pfkeyv2.h>
63 #include <netipsec/key.h>
64 #include <netipsec/keysock.h>
65 #include <netipsec/key_debug.h>
66 #include <netipsec/ipsec.h>
68 #include <machine/stdarg.h>
74 VNET_DEFINE_STATIC(struct key_cb, key_cb);
75 #define V_key_cb VNET(key_cb)
77 static struct sockaddr key_src = { 2, PF_KEY, };
79 static int key_sendup0(struct rawcb *, struct mbuf *, int);
81 VNET_PCPUSTAT_DEFINE(struct pfkeystat, pfkeystat);
82 VNET_PCPUSTAT_SYSINIT(pfkeystat);
85 VNET_PCPUSTAT_SYSUNINIT(pfkeystat);
92 key_output(struct mbuf *m, struct socket *so, ...)
98 panic("%s: NULL pointer was passed.\n", __func__);
100 PFKEYSTAT_INC(out_total);
101 PFKEYSTAT_ADD(out_bytes, m->m_pkthdr.len);
103 len = m->m_pkthdr.len;
104 if (len < sizeof(struct sadb_msg)) {
105 PFKEYSTAT_INC(out_tooshort);
110 if (m->m_len < sizeof(struct sadb_msg)) {
111 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == NULL) {
112 PFKEYSTAT_INC(out_nomem);
120 KEYDBG(KEY_DUMP, kdebug_mbuf(m));
122 msg = mtod(m, struct sadb_msg *);
123 PFKEYSTAT_INC(out_msgtype[msg->sadb_msg_type]);
124 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
125 PFKEYSTAT_INC(out_invlen);
130 error = key_parse(m, so);
139 * send message to the socket.
142 key_sendup0(struct rawcb *rp, struct mbuf *m, int promisc)
147 struct sadb_msg *pmsg;
149 M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
151 PFKEYSTAT_INC(in_nomem);
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_INC(in_msgtype[pmsg->sadb_msg_type]);
164 if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
166 PFKEYSTAT_INC(in_nomem);
171 sorwakeup(rp->rcb_socket);
175 /* so can be NULL if target != KEY_SENDUP_ONE */
177 key_sendup_mbuf(struct socket *so, struct mbuf *m, int target)
184 KASSERT(m != NULL, ("NULL mbuf pointer was passed."));
185 KASSERT(so != NULL || target != KEY_SENDUP_ONE,
186 ("NULL socket pointer was passed."));
187 KASSERT(target == KEY_SENDUP_ONE || target == KEY_SENDUP_ALL ||
188 target == KEY_SENDUP_REGISTERED, ("Wrong target %d", target));
190 PFKEYSTAT_INC(in_total);
191 PFKEYSTAT_ADD(in_bytes, m->m_pkthdr.len);
192 if (m->m_len < sizeof(struct sadb_msg)) {
193 m = m_pullup(m, sizeof(struct sadb_msg));
195 PFKEYSTAT_INC(in_nomem);
199 if (m->m_len >= sizeof(struct sadb_msg)) {
200 struct sadb_msg *msg;
201 msg = mtod(m, struct sadb_msg *);
202 PFKEYSTAT_INC(in_msgtype[msg->sadb_msg_type]);
204 mtx_lock(&rawcb_mtx);
205 if (V_key_cb.any_count == 0) {
206 mtx_unlock(&rawcb_mtx);
210 LIST_FOREACH(rp, &V_rawcb_list, list)
212 if (rp->rcb_proto.sp_family != PF_KEY)
214 if (rp->rcb_proto.sp_protocol
215 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
220 * If you are in promiscuous mode, and when you get broadcasted
221 * reply, you'll get two PF_KEY messages.
222 * (based on pf_key@inner.net message on 14 Oct 1998)
224 kp = (struct keycb *)rp;
225 if (kp->kp_promisc) {
226 n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
228 key_sendup0(rp, n, 1);
230 PFKEYSTAT_INC(in_nomem);
233 /* the exact target will be processed later */
234 if (so && sotorawcb(so) == rp)
237 if (target == KEY_SENDUP_ONE || (
238 target == KEY_SENDUP_REGISTERED && kp->kp_registered == 0))
241 /* KEY_SENDUP_ALL + KEY_SENDUP_REGISTERED */
242 n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
244 PFKEYSTAT_INC(in_nomem);
245 /* Try send to another socket */
249 if (key_sendup0(rp, n, 0) == 0)
250 PFKEYSTAT_INC(in_msgtarget[target]);
253 if (so) { /* KEY_SENDUP_ONE */
254 error = key_sendup0(sotorawcb(so), m, 0);
256 PFKEYSTAT_INC(in_msgtarget[KEY_SENDUP_ONE]);
261 mtx_unlock(&rawcb_mtx);
267 * derived from net/rtsock.c:rts_abort()
270 key_abort(struct socket *so)
272 raw_usrreqs.pru_abort(so);
277 * derived from net/rtsock.c:rts_attach()
280 key_attach(struct socket *so, int proto, struct thread *td)
285 KASSERT(so->so_pcb == NULL, ("key_attach: so_pcb != NULL"));
288 error = priv_check(td, PRIV_NET_RAW);
294 kp = malloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
298 so->so_pcb = (caddr_t)kp;
299 error = raw_attach(so, proto);
300 kp = (struct keycb *)sotorawcb(so);
303 so->so_pcb = (caddr_t) 0;
307 kp->kp_promisc = kp->kp_registered = 0;
309 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
310 V_key_cb.key_count++;
311 V_key_cb.any_count++;
313 so->so_options |= SO_USELOOPBACK;
320 * derived from net/rtsock.c:rts_bind()
323 key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
330 * derived from net/rtsock.c:rts_close().
333 key_close(struct socket *so)
336 raw_usrreqs.pru_close(so);
341 * derived from net/rtsock.c:rts_connect()
344 key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
351 * derived from net/rtsock.c:rts_detach()
354 key_detach(struct socket *so)
356 struct keycb *kp = (struct keycb *)sotorawcb(so);
358 KASSERT(kp != NULL, ("key_detach: kp == NULL"));
359 if (kp->kp_raw.rcb_proto.sp_protocol
360 == PF_KEY) /* XXX: AF_KEY */
361 V_key_cb.key_count--;
362 V_key_cb.any_count--;
365 raw_usrreqs.pru_detach(so);
370 * derived from net/rtsock.c:key_disconnect()
373 key_disconnect(struct socket *so)
375 return(raw_usrreqs.pru_disconnect(so));
380 * derived from net/rtsock.c:rts_peeraddr()
383 key_peeraddr(struct socket *so, struct sockaddr **nam)
385 return(raw_usrreqs.pru_peeraddr(so, nam));
390 * derived from net/rtsock.c:rts_send()
393 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
394 struct mbuf *control, struct thread *td)
396 return(raw_usrreqs.pru_send(so, flags, m, nam, control, td));
401 * derived from net/rtsock.c:rts_shutdown()
404 key_shutdown(struct socket *so)
406 return(raw_usrreqs.pru_shutdown(so));
411 * derived from net/rtsock.c:rts_sockaddr()
414 key_sockaddr(struct socket *so, struct sockaddr **nam)
416 return(raw_usrreqs.pru_sockaddr(so, nam));
419 struct pr_usrreqs key_usrreqs = {
420 .pru_abort = key_abort,
421 .pru_attach = key_attach,
422 .pru_bind = key_bind,
423 .pru_connect = key_connect,
424 .pru_detach = key_detach,
425 .pru_disconnect = key_disconnect,
426 .pru_peeraddr = key_peeraddr,
427 .pru_send = key_send,
428 .pru_shutdown = key_shutdown,
429 .pru_sockaddr = key_sockaddr,
430 .pru_close = key_close,
434 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
438 * Definitions of protocols supported in the KEY domain.
441 extern struct domain keydomain;
443 struct protosw keysw[] = {
446 .pr_domain = &keydomain,
447 .pr_protocol = PF_KEY_V2,
448 .pr_flags = PR_ATOMIC|PR_ADDR,
449 .pr_output = key_output,
450 .pr_ctlinput = raw_ctlinput,
452 .pr_usrreqs = &key_usrreqs
460 bzero((caddr_t)&V_key_cb, sizeof(V_key_cb));
464 struct domain keydomain = {
465 .dom_family = PF_KEY,
467 .dom_init = key_init0,
469 .dom_destroy = key_destroy,
471 .dom_protosw = keysw,
472 .dom_protoswNPROTOSW = &keysw[nitems(keysw)]
475 VNET_DOMAIN_SET(key);