[apple/xnu.git] / bsd / netkey / keysock.c

/*	$KAME: keysock.c,v 1.13 2000/03/25 07:24:13 sumikawa Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/errno.h>

#include <kern/locks.h>

#include <net/raw_cb.h>
#include <net/route.h>

#include <net/pfkeyv2.h>
#include <netkey/keydb.h>
#include <netkey/key.h>
#include <netkey/keysock.h>
#include <netkey/key_debug.h>

extern lck_mtx_t *raw_mtx;
extern void key_init(void) __attribute__((section("__TEXT, initcode")));

struct sockaddr key_dst = { 2, PF_KEY, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,} };
struct sockaddr key_src = { 2, PF_KEY, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,} };

static int key_sendup0(struct rawcb *, struct mbuf *, int);

struct pfkeystat pfkeystat;


extern lck_mtx_t *pfkey_stat_mutex;

/*
 * key_output()
 */
int
#ifdef __APPLE__
/* No variable argument support? */
key_output(struct mbuf *m, struct socket *so)
#else
#if __STDC__
key_output(struct mbuf *m, ...)
#else
key_output(m, va_alist)
	struct mbuf *m;
	va_dcl
#endif
#endif
{
	struct sadb_msg *msg;
	int len, error = 0;
#ifndef __APPLE__
	struct socket *so;
	va_list ap;

	va_start(ap, m);
	so = va_arg(ap, struct socket *);
	va_end(ap);
#endif

	if (m == 0)
		panic("key_output: NULL pointer was passed.\n");

	socket_unlock(so, 0);
	lck_mtx_lock(pfkey_stat_mutex);
	pfkeystat.out_total++;
	pfkeystat.out_bytes += m->m_pkthdr.len;
	lck_mtx_unlock(pfkey_stat_mutex);

	len = m->m_pkthdr.len;
	if (len < sizeof(struct sadb_msg)) {
#if IPSEC_DEBUG
		printf("key_output: Invalid message length.\n");
#endif
		PFKEY_STAT_INCREMENT(pfkeystat.out_tooshort);
		error = EINVAL;
		goto end;
	}

	if (m->m_len < sizeof(struct sadb_msg)) {
		if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
#if IPSEC_DEBUG
			printf("key_output: can't pullup mbuf\n");
#endif
			PFKEY_STAT_INCREMENT(pfkeystat.out_nomem);
			error = ENOBUFS;
			goto end;
		}
	}

	if ((m->m_flags & M_PKTHDR) == 0)
		panic("key_output: not M_PKTHDR ??");

#if IPSEC_DEBUG
	KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
#endif /* defined(IPSEC_DEBUG) */

	msg = mtod(m, struct sadb_msg *);
	PFKEY_STAT_INCREMENT(pfkeystat.out_msgtype[msg->sadb_msg_type]);
	if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
#if IPSEC_DEBUG
		printf("key_output: Invalid message length.\n");
#endif
		PFKEY_STAT_INCREMENT(pfkeystat.out_invlen);
		error = EINVAL;
		goto end;
	}

	error = key_parse(m, so);
	m = NULL;

end:
	if (m)
		m_freem(m);
	socket_lock(so, 0);
	return error;
}

/*
 * send message to the socket.
 */
static int
key_sendup0(rp, m, promisc)
	struct rawcb *rp;
	struct mbuf *m;
	int promisc;
{
	int error;

	if (promisc) {
		struct sadb_msg *pmsg;

		M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
		if (m && m->m_len < sizeof(struct sadb_msg))
			m = m_pullup(m, sizeof(struct sadb_msg));
		if (!m) {
#if IPSEC_DEBUG
			printf("key_sendup0: cannot pullup\n");
#endif
			PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
			m_freem(m);
			return ENOBUFS;
		}
		m->m_pkthdr.len += sizeof(*pmsg);

		pmsg = mtod(m, struct sadb_msg *);
		bzero(pmsg, sizeof(*pmsg));
		pmsg->sadb_msg_version = PF_KEY_V2;
		pmsg->sadb_msg_type = SADB_X_PROMISC;
		pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
		/* pid and seq? */

		PFKEY_STAT_INCREMENT(pfkeystat.in_msgtype[pmsg->sadb_msg_type]);
	}

	if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
	    m, NULL, &error)) {
#if IPSEC_DEBUG
		printf("key_sendup0: sbappendaddr failed\n");
#endif
		PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
	}
	else {
		sorwakeup(rp->rcb_socket);
	}
	return error;
}


/* so can be NULL if target != KEY_SENDUP_ONE */
int
key_sendup_mbuf(so, m, target)
	struct socket *so;
	struct mbuf *m;
	int target;
{
	struct mbuf *n;
	struct keycb *kp;
	int sendup;
	struct rawcb *rp;
	int error = 0;

	if (m == NULL)
		panic("key_sendup_mbuf: NULL pointer was passed.\n");
	if (so == NULL && target == KEY_SENDUP_ONE)
		panic("key_sendup_mbuf: NULL pointer was passed.\n");

	lck_mtx_lock(pfkey_stat_mutex);
	pfkeystat.in_total++;
	pfkeystat.in_bytes += m->m_pkthdr.len;
	lck_mtx_unlock(pfkey_stat_mutex);
	if (m->m_len < sizeof(struct sadb_msg)) {
#if 1
		m = m_pullup(m, sizeof(struct sadb_msg));
		if (m == NULL) {
			PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
			return ENOBUFS;
		}
#else
		/* don't bother pulling it up just for stats */
#endif
	}
	if (m->m_len >= sizeof(struct sadb_msg)) {
		struct sadb_msg *msg;
		msg = mtod(m, struct sadb_msg *);
		PFKEY_STAT_INCREMENT(pfkeystat.in_msgtype[msg->sadb_msg_type]);
	}
	
	lck_mtx_lock(raw_mtx);
	LIST_FOREACH(rp, &rawcb_list, list)
	{
		if (rp->rcb_proto.sp_family != PF_KEY)
			continue;
		if (rp->rcb_proto.sp_protocol
		 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
			continue;
		}

		kp = (struct keycb *)rp;
		
		socket_lock(rp->rcb_socket, 1);
		/*
		 * If you are in promiscuous mode, and when you get broadcasted
		 * reply, you'll get two PF_KEY messages.
		 * (based on pf_key@inner.net message on 14 Oct 1998)
		 */
		if (((struct keycb *)rp)->kp_promisc) {
			if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
				(void)key_sendup0(rp, n, 1);
				n = NULL;
			}
		}

		/* the exact target will be processed later */
		if (so && sotorawcb(so) == rp) {
			socket_unlock(rp->rcb_socket, 1);
			continue;
		}

		sendup = 0;
		switch (target) {
		case KEY_SENDUP_ONE:
			/* the statement has no effect */
			break;
		case KEY_SENDUP_ALL:
			sendup++;
			break;
		case KEY_SENDUP_REGISTERED:
			if (kp->kp_registered)
				sendup++;
			break;
		}
		PFKEY_STAT_INCREMENT(pfkeystat.in_msgtarget[target]);

		if (!sendup) {
			socket_unlock(rp->rcb_socket, 1);
			continue;
		}
		else
			sendup = 0;  // clear for next iteration

		if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
#if IPSEC_DEBUG
			printf("key_sendup: m_copy fail\n");
#endif
			m_freem(m);
			PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
			socket_unlock(rp->rcb_socket, 1);
			lck_mtx_unlock(raw_mtx);
			return ENOBUFS;
		}

		/*
		 * ignore error even if queue is full.  PF_KEY does not
		 * guarantee the delivery of the message.
		 * this is important when target == KEY_SENDUP_ALL.
		 */
		key_sendup0(rp, n, 0);
		socket_unlock(rp->rcb_socket, 1);
		n = NULL;
	}

	lck_mtx_unlock(raw_mtx);
	if (so) {
		socket_lock(so, 1);
		error = key_sendup0(sotorawcb(so), m, 0);
		socket_unlock(so, 1);
		m = NULL;
	} else {
		error = 0;
		m_freem(m);
	}
	return error;
}

/*
 * key_abort()
 * derived from net/rtsock.c:rts_abort()
 */
static int
key_abort(struct socket *so)
{
	int error;
	error = raw_usrreqs.pru_abort(so);
	return error;
}

/*
 * key_attach()
 * derived from net/rtsock.c:rts_attach()
 */
static int
key_attach(struct socket *so, int proto, struct proc *p)
{
	struct keycb *kp;
	int error;

	if (sotorawcb(so) != 0)
		return EISCONN;	/* XXX panic? */
	kp = (struct keycb *)_MALLOC(sizeof *kp, M_PCB, M_WAITOK); /* XXX */
	if (kp == 0)
		return ENOBUFS;
	bzero(kp, sizeof *kp);

	so->so_pcb = (caddr_t)kp;
	kp->kp_promisc = kp->kp_registered = 0;
	kp->kp_raw.rcb_laddr = &key_src;
	kp->kp_raw.rcb_faddr = &key_dst;

	error = raw_usrreqs.pru_attach(so, proto, p);
	kp = (struct keycb *)sotorawcb(so);
	if (error) {
		_FREE(kp, M_PCB);
		so->so_pcb = (caddr_t) 0;
		so->so_flags |= SOF_PCBCLEARING;
		printf("key_usrreq: key_usrreq results %d\n", error);
		return error;
	}

	/* so is already locked when calling key_attach */
	if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
		key_cb.key_count++;
	key_cb.any_count++;
	soisconnected(so);
	so->so_options |= SO_USELOOPBACK;

	return 0;
}

/*
 * key_bind()
 * derived from net/rtsock.c:rts_bind()
 */
static int
key_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
{
	int error;
	error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */
	return error;
}

/*
 * key_connect()
 * derived from net/rtsock.c:rts_connect()
 */
static int
key_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
{
	int error;
	error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */
	return error;
}

/*
 * key_detach()
 * derived from net/rtsock.c:rts_detach()
 */
static int
key_detach(struct socket *so)
{
	struct keycb *kp = (struct keycb *)sotorawcb(so);
	int error;

	if (kp != 0) {
		if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
			key_cb.key_count--;
		key_cb.any_count--;
		socket_unlock(so, 0);
		key_freereg(so);
		socket_lock(so, 0);
	}
	error = raw_usrreqs.pru_detach(so);
	return error;
}

/*
 * key_disconnect()
 * derived from net/rtsock.c:key_disconnect()
 */
static int
key_disconnect(struct socket *so)
{
	int error;
	error = raw_usrreqs.pru_disconnect(so);
	return error;
}

/*
 * key_peeraddr()
 * derived from net/rtsock.c:rts_peeraddr()
 */
static int
key_peeraddr(struct socket *so, struct sockaddr **nam)
{
	int error;
	error = raw_usrreqs.pru_peeraddr(so, nam);
	return error;
}

/*
 * key_send()
 * derived from net/rtsock.c:rts_send()
 */
static int
key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
	 struct mbuf *control, struct proc *p)
{
	int error;
	error = raw_usrreqs.pru_send(so, flags, m, nam, control, p);
	return error;
}

/*
 * key_shutdown()
 * derived from net/rtsock.c:rts_shutdown()
 */
static int
key_shutdown(struct socket *so)
{
	int error;
	error = raw_usrreqs.pru_shutdown(so);
	return error;
}

/*
 * key_sockaddr()
 * derived from net/rtsock.c:rts_sockaddr()
 */
static int
key_sockaddr(struct socket *so, struct sockaddr **nam)
{
	int error;
	error = raw_usrreqs.pru_sockaddr(so, nam);
	return error;
}

struct pr_usrreqs key_usrreqs = {
	key_abort, pru_accept_notsupp, key_attach, key_bind,
	key_connect,
	pru_connect2_notsupp, pru_control_notsupp, key_detach,
	key_disconnect, pru_listen_notsupp, key_peeraddr,
	pru_rcvd_notsupp,
	pru_rcvoob_notsupp, key_send, pru_sense_null, key_shutdown,
	key_sockaddr, sosend, soreceive, pru_sopoll_notsupp
};

/* sysctl */
SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW|CTLFLAG_LOCKED, 0, "Key Family");

/*
 * Definitions of protocols supported in the KEY domain.
 */

extern struct domain keydomain;

struct protosw keysw[] = {
{ SOCK_RAW,	&keydomain,	PF_KEY_V2,	PR_ATOMIC|PR_ADDR,
  NULL,		key_output,	raw_ctlinput,	NULL,
  NULL,
  key_init,	NULL,		NULL,		NULL,
  NULL,
  &key_usrreqs,
  NULL,		NULL,		NULL,
  { NULL, NULL }, NULL, { 0 }
}
};

struct domain keydomain = { PF_KEY, "key", key_domain_init, NULL, NULL,
      keysw, NULL,
      NULL, 0,
      sizeof(struct key_cb), 0, 0,
      NULL, 0, { 0, 0}
};

DOMAIN_SET(key);
Commit	Line	Data
1c79356b A	1	/* $KAME: keysock.c,v 1.13 2000/03/25 07:24:13 sumikawa Exp $ */
	2
	3	/*
	4	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. Neither the name of the project nor the names of its contributors
	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
1c79356b A	32	/* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
1c79356b A	33
1c79356b A	34	#include <sys/types.h>
	35	#include <sys/param.h>
	36	#include <sys/systm.h>
	37	#include <sys/kernel.h>
1c79356b	38	#include <sys/sysctl.h>
1c79356b	39	#include <sys/mbuf.h>
1c79356b	40	#include <sys/malloc.h>
1c79356b A	41	#include <sys/socket.h>
	42	#include <sys/socketvar.h>
	43	#include <sys/domain.h>
	44	#include <sys/protosw.h>
	45	#include <sys/errno.h>
1c79356b	46
91447636	47	#include <kern/locks.h>
1c79356b A	48
	49	#include <net/raw_cb.h>
	50	#include <net/route.h>
	51
	52	#include <net/pfkeyv2.h>
	53	#include <netkey/keydb.h>
	54	#include <netkey/key.h>
	55	#include <netkey/keysock.h>
	56	#include <netkey/key_debug.h>
	57
91447636	58	extern lck_mtx_t *raw_mtx;
2d21ac55	59	extern void key_init(void) __attribute__((section("__TEXT, initcode")));
91447636	60
2d21ac55 A	61	struct sockaddr key_dst = { 2, PF_KEY, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,} };
2d21ac55 A	62	struct sockaddr key_src = { 2, PF_KEY, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,} };
1c79356b	63
91447636	64	static int key_sendup0(struct rawcb , struct mbuf , int);
1c79356b A	65
	66	struct pfkeystat pfkeystat;
	67
2d21ac55 A	68
	69	extern lck_mtx_t *pfkey_stat_mutex;
	70
1c79356b	71	/*
9bccf70c	72	* key_output()
1c79356b	73	*/
1c79356b	74	int
9bccf70c A	75	#ifdef __APPLE__
	76	/* No variable argument support? */
	77	key_output(struct mbuf m, struct socket so)
1c79356b	78	#else
9bccf70c A	79	#if __STDC__
9bccf70c A	80	key_output(struct mbuf *m, ...)
1c79356b	81	#else
9bccf70c A	82	key_output(m, va_alist)
	83	struct mbuf *m;
	84	va_dcl
1c79356b	85	#endif
1c79356b	86	#endif
1c79356b	87	{
9bccf70c	88	struct sadb_msg *msg;
1c79356b	89	int len, error = 0;
9bccf70c A	90	#ifndef __APPLE__
	91	struct socket *so;
	92	va_list ap;
	93
	94	va_start(ap, m);
	95	so = va_arg(ap, struct socket *);
	96	va_end(ap);
	97	#endif
1c79356b A	98
	99	if (m == 0)
	100	panic("key_output: NULL pointer was passed.\n");
	101
91447636	102	socket_unlock(so, 0);
2d21ac55	103	lck_mtx_lock(pfkey_stat_mutex);
1c79356b A	104	pfkeystat.out_total++;
1c79356b A	105	pfkeystat.out_bytes += m->m_pkthdr.len;
2d21ac55	106	lck_mtx_unlock(pfkey_stat_mutex);
1c79356b A	107
	108	len = m->m_pkthdr.len;
	109	if (len < sizeof(struct sadb_msg)) {
	110	#if IPSEC_DEBUG
	111	printf("key_output: Invalid message length.\n");
	112	#endif
2d21ac55	113	PFKEY_STAT_INCREMENT(pfkeystat.out_tooshort);
1c79356b A	114	error = EINVAL;
	115	goto end;
	116	}
	117
	118	if (m->m_len < sizeof(struct sadb_msg)) {
	119	if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
	120	#if IPSEC_DEBUG
	121	printf("key_output: can't pullup mbuf\n");
	122	#endif
2d21ac55	123	PFKEY_STAT_INCREMENT(pfkeystat.out_nomem);
1c79356b A	124	error = ENOBUFS;
	125	goto end;
	126	}
	127	}
	128
	129	if ((m->m_flags & M_PKTHDR) == 0)
	130	panic("key_output: not M_PKTHDR ??");
	131
9bccf70c	132	#if IPSEC_DEBUG
1c79356b A	133	KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
	134	#endif /* defined(IPSEC_DEBUG) */
	135
	136	msg = mtod(m, struct sadb_msg *);
2d21ac55	137	PFKEY_STAT_INCREMENT(pfkeystat.out_msgtype[msg->sadb_msg_type]);
1c79356b A	138	if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
	139	#if IPSEC_DEBUG
	140	printf("key_output: Invalid message length.\n");
	141	#endif
2d21ac55	142	PFKEY_STAT_INCREMENT(pfkeystat.out_invlen);
1c79356b A	143	error = EINVAL;
	144	goto end;
	145	}
	146
9bccf70c A	147	error = key_parse(m, so);
9bccf70c A	148	m = NULL;
91447636	149
1c79356b	150	end:
9bccf70c A	151	if (m)
9bccf70c A	152	m_freem(m);
91447636	153	socket_lock(so, 0);
9bccf70c	154	return error;
1c79356b A	155	}
	156
	157	/*
	158	* send message to the socket.
	159	*/
	160	static int
	161	key_sendup0(rp, m, promisc)
	162	struct rawcb *rp;
	163	struct mbuf *m;
	164	int promisc;
	165	{
9bccf70c A	166	int error;
9bccf70c A	167
1c79356b A	168	if (promisc) {
	169	struct sadb_msg *pmsg;
	170
	171	M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
	172	if (m && m->m_len < sizeof(struct sadb_msg))
	173	m = m_pullup(m, sizeof(struct sadb_msg));
	174	if (!m) {
	175	#if IPSEC_DEBUG
	176	printf("key_sendup0: cannot pullup\n");
	177	#endif
2d21ac55	178	PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
1c79356b A	179	m_freem(m);
	180	return ENOBUFS;
	181	}
	182	m->m_pkthdr.len += sizeof(*pmsg);
	183
	184	pmsg = mtod(m, struct sadb_msg *);
	185	bzero(pmsg, sizeof(*pmsg));
	186	pmsg->sadb_msg_version = PF_KEY_V2;
	187	pmsg->sadb_msg_type = SADB_X_PROMISC;
	188	pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
	189	/* pid and seq? */
	190
2d21ac55	191	PFKEY_STAT_INCREMENT(pfkeystat.in_msgtype[pmsg->sadb_msg_type]);
1c79356b A	192	}
1c79356b A	193
9bccf70c	194	if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
91447636	195	m, NULL, &error)) {
1c79356b A	196	#if IPSEC_DEBUG
	197	printf("key_sendup0: sbappendaddr failed\n");
	198	#endif
2d21ac55	199	PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
91447636 A	200	}
	201	else {
	202	sorwakeup(rp->rcb_socket);
	203	}
9bccf70c	204	return error;
1c79356b A	205	}
1c79356b A	206
1c79356b	207
9bccf70c	208	/* so can be NULL if target != KEY_SENDUP_ONE */
1c79356b A	209	int
	210	key_sendup_mbuf(so, m, target)
	211	struct socket *so;
	212	struct mbuf *m;
	213	int target;
	214	{
	215	struct mbuf *n;
	216	struct keycb *kp;
	217	int sendup;
	218	struct rawcb *rp;
9bccf70c	219	int error = 0;
1c79356b	220
9bccf70c A	221	if (m == NULL)
	222	panic("key_sendup_mbuf: NULL pointer was passed.\n");
	223	if (so == NULL && target == KEY_SENDUP_ONE)
1c79356b A	224	panic("key_sendup_mbuf: NULL pointer was passed.\n");
1c79356b A	225
2d21ac55	226	lck_mtx_lock(pfkey_stat_mutex);
1c79356b A	227	pfkeystat.in_total++;
1c79356b A	228	pfkeystat.in_bytes += m->m_pkthdr.len;
2d21ac55	229	lck_mtx_unlock(pfkey_stat_mutex);
1c79356b A	230	if (m->m_len < sizeof(struct sadb_msg)) {
	231	#if 1
	232	m = m_pullup(m, sizeof(struct sadb_msg));
	233	if (m == NULL) {
2d21ac55	234	PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
1c79356b A	235	return ENOBUFS;
	236	}
	237	#else
	238	/* don't bother pulling it up just for stats */
	239	#endif
	240	}
	241	if (m->m_len >= sizeof(struct sadb_msg)) {
	242	struct sadb_msg *msg;
	243	msg = mtod(m, struct sadb_msg *);
2d21ac55	244	PFKEY_STAT_INCREMENT(pfkeystat.in_msgtype[msg->sadb_msg_type]);
1c79356b	245	}
91447636 A	246
91447636 A	247	lck_mtx_lock(raw_mtx);
1c79356b	248	LIST_FOREACH(rp, &rawcb_list, list)
1c79356b A	249	{
	250	if (rp->rcb_proto.sp_family != PF_KEY)
	251	continue;
	252	if (rp->rcb_proto.sp_protocol
	253	&& rp->rcb_proto.sp_protocol != PF_KEY_V2) {
	254	continue;
	255	}
	256
	257	kp = (struct keycb *)rp;
91447636 A	258
91447636 A	259	socket_lock(rp->rcb_socket, 1);
1c79356b A	260	/*
	261	* If you are in promiscuous mode, and when you get broadcasted
	262	* reply, you'll get two PF_KEY messages.
	263	* (based on pf_key@inner.net message on 14 Oct 1998)
	264	*/
	265	if (((struct keycb *)rp)->kp_promisc) {
	266	if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
	267	(void)key_sendup0(rp, n, 1);
	268	n = NULL;
	269	}
	270	}
	271
	272	/* the exact target will be processed later */
91447636 A	273	if (so && sotorawcb(so) == rp) {
91447636 A	274	socket_unlock(rp->rcb_socket, 1);
1c79356b	275	continue;
91447636	276	}
1c79356b A	277
	278	sendup = 0;
	279	switch (target) {
	280	case KEY_SENDUP_ONE:
	281	/* the statement has no effect */
1c79356b A	282	break;
	283	case KEY_SENDUP_ALL:
	284	sendup++;
	285	break;
	286	case KEY_SENDUP_REGISTERED:
	287	if (kp->kp_registered)
	288	sendup++;
	289	break;
	290	}
2d21ac55	291	PFKEY_STAT_INCREMENT(pfkeystat.in_msgtarget[target]);
1c79356b	292
91447636 A	293	if (!sendup) {
91447636 A	294	socket_unlock(rp->rcb_socket, 1);
1c79356b	295	continue;
91447636 A	296	}
	297	else
	298	sendup = 0; // clear for next iteration
1c79356b A	299
	300	if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
	301	#if IPSEC_DEBUG
	302	printf("key_sendup: m_copy fail\n");
	303	#endif
	304	m_freem(m);
2d21ac55	305	PFKEY_STAT_INCREMENT(pfkeystat.in_nomem);
91447636 A	306	socket_unlock(rp->rcb_socket, 1);
91447636 A	307	lck_mtx_unlock(raw_mtx);
1c79356b A	308	return ENOBUFS;
	309	}
	310
91447636 A	311	/*
	312	* ignore error even if queue is full. PF_KEY does not
	313	* guarantee the delivery of the message.
	314	* this is important when target == KEY_SENDUP_ALL.
	315	*/
	316	key_sendup0(rp, n, 0);
	317	socket_unlock(rp->rcb_socket, 1);
1c79356b A	318	n = NULL;
	319	}
	320
91447636	321	lck_mtx_unlock(raw_mtx);
9bccf70c	322	if (so) {
91447636	323	socket_lock(so, 1);
9bccf70c	324	error = key_sendup0(sotorawcb(so), m, 0);
91447636	325	socket_unlock(so, 1);
9bccf70c A	326	m = NULL;
	327	} else {
	328	error = 0;
	329	m_freem(m);
	330	}
1c79356b A	331	return error;
	332	}
	333
1c79356b A	334	/*
	335	* key_abort()
	336	* derived from net/rtsock.c:rts_abort()
	337	*/
	338	static int
	339	key_abort(struct socket *so)
	340	{
91447636	341	int error;
1c79356b	342	error = raw_usrreqs.pru_abort(so);
1c79356b A	343	return error;
	344	}
	345
	346	/*
	347	* key_attach()
	348	* derived from net/rtsock.c:rts_attach()
	349	*/
	350	static int
	351	key_attach(struct socket so, int proto, struct proc p)
	352	{
	353	struct keycb *kp;
91447636	354	int error;
1c79356b A	355
	356	if (sotorawcb(so) != 0)
	357	return EISCONN; /* XXX panic? */
	358	kp = (struct keycb )_MALLOC(sizeof kp, M_PCB, M_WAITOK); /* XXX */
	359	if (kp == 0)
	360	return ENOBUFS;
	361	bzero(kp, sizeof *kp);
	362
1c79356b	363	so->so_pcb = (caddr_t)kp;
91447636 A	364	kp->kp_promisc = kp->kp_registered = 0;
	365	kp->kp_raw.rcb_laddr = &key_src;
	366	kp->kp_raw.rcb_faddr = &key_dst;
	367
1c79356b A	368	error = raw_usrreqs.pru_attach(so, proto, p);
	369	kp = (struct keycb *)sotorawcb(so);
	370	if (error) {
	371	_FREE(kp, M_PCB);
	372	so->so_pcb = (caddr_t) 0;
91447636	373	so->so_flags \|= SOF_PCBCLEARING;
1c79356b A	374	printf("key_usrreq: key_usrreq results %d\n", error);
	375	return error;
	376	}
	377
37839358	378	/* so is already locked when calling key_attach */
1c79356b A	379	if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
	380	key_cb.key_count++;
	381	key_cb.any_count++;
1c79356b A	382	soisconnected(so);
	383	so->so_options \|= SO_USELOOPBACK;
	384
1c79356b A	385	return 0;
	386	}
	387
	388	/*
	389	* key_bind()
	390	* derived from net/rtsock.c:rts_bind()
	391	*/
	392	static int
	393	key_bind(struct socket so, struct sockaddr nam, struct proc *p)
	394	{
91447636	395	int error;
1c79356b	396	error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */
1c79356b A	397	return error;
	398	}
	399
	400	/*
	401	* key_connect()
	402	* derived from net/rtsock.c:rts_connect()
	403	*/
	404	static int
	405	key_connect(struct socket so, struct sockaddr nam, struct proc *p)
	406	{
91447636	407	int error;
1c79356b	408	error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */
1c79356b A	409	return error;
	410	}
	411
	412	/*
	413	* key_detach()
	414	* derived from net/rtsock.c:rts_detach()
	415	*/
	416	static int
	417	key_detach(struct socket *so)
	418	{
	419	struct keycb kp = (struct keycb )sotorawcb(so);
91447636	420	int error;
1c79356b	421
1c79356b	422	if (kp != 0) {
91447636	423	if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
1c79356b A	424	key_cb.key_count--;
1c79356b A	425	key_cb.any_count--;
91447636	426	socket_unlock(so, 0);
1c79356b	427	key_freereg(so);
91447636	428	socket_lock(so, 0);
1c79356b A	429	}
1c79356b A	430	error = raw_usrreqs.pru_detach(so);
1c79356b A	431	return error;
	432	}
	433
	434	/*
	435	* key_disconnect()
	436	* derived from net/rtsock.c:key_disconnect()
	437	*/
	438	static int
	439	key_disconnect(struct socket *so)
	440	{
91447636	441	int error;
1c79356b	442	error = raw_usrreqs.pru_disconnect(so);
1c79356b A	443	return error;
	444	}
	445
	446	/*
	447	* key_peeraddr()
	448	* derived from net/rtsock.c:rts_peeraddr()
	449	*/
	450	static int
	451	key_peeraddr(struct socket so, struct sockaddr *nam)
	452	{
91447636	453	int error;
1c79356b	454	error = raw_usrreqs.pru_peeraddr(so, nam);
1c79356b A	455	return error;
	456	}
	457
	458	/*
	459	* key_send()
	460	* derived from net/rtsock.c:rts_send()
	461	*/
	462	static int
	463	key_send(struct socket so, int flags, struct mbuf m, struct sockaddr *nam,
	464	struct mbuf control, struct proc p)
	465	{
91447636	466	int error;
1c79356b	467	error = raw_usrreqs.pru_send(so, flags, m, nam, control, p);
1c79356b A	468	return error;
	469	}
	470
	471	/*
	472	* key_shutdown()
	473	* derived from net/rtsock.c:rts_shutdown()
	474	*/
	475	static int
	476	key_shutdown(struct socket *so)
	477	{
91447636	478	int error;
1c79356b	479	error = raw_usrreqs.pru_shutdown(so);
1c79356b A	480	return error;
	481	}
	482
	483	/*
	484	* key_sockaddr()
	485	* derived from net/rtsock.c:rts_sockaddr()
	486	*/
	487	static int
	488	key_sockaddr(struct socket so, struct sockaddr *nam)
	489	{
91447636	490	int error;
1c79356b	491	error = raw_usrreqs.pru_sockaddr(so, nam);
1c79356b A	492	return error;
	493	}
	494
	495	struct pr_usrreqs key_usrreqs = {
	496	key_abort, pru_accept_notsupp, key_attach, key_bind,
	497	key_connect,
	498	pru_connect2_notsupp, pru_control_notsupp, key_detach,
	499	key_disconnect, pru_listen_notsupp, key_peeraddr,
	500	pru_rcvd_notsupp,
	501	pru_rcvoob_notsupp, key_send, pru_sense_null, key_shutdown,
91447636	502	key_sockaddr, sosend, soreceive, pru_sopoll_notsupp
1c79356b	503	};
1c79356b	504
1c79356b	505	/* sysctl */
2d21ac55	506	SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW\|CTLFLAG_LOCKED, 0, "Key Family");
1c79356b A	507
	508	/*
	509	* Definitions of protocols supported in the KEY domain.
	510	*/
	511
	512	extern struct domain keydomain;
	513
	514	struct protosw keysw[] = {
	515	{ SOCK_RAW, &keydomain, PF_KEY_V2, PR_ATOMIC\|PR_ADDR,
2d21ac55 A	516	NULL, key_output, raw_ctlinput, NULL,
	517	NULL,
	518	key_init, NULL, NULL, NULL,
	519	NULL,
91447636	520	&key_usrreqs,
2d21ac55 A	521	NULL, NULL, NULL,
2d21ac55 A	522	{ NULL, NULL }, NULL, { 0 }
1c79356b A	523	}
	524	};
	525
2d21ac55 A	526	struct domain keydomain = { PF_KEY, "key", key_domain_init, NULL, NULL,
	527	keysw, NULL,
	528	NULL, 0,
	529	sizeof(struct key_cb), 0, 0,
	530	NULL, 0, { 0, 0}
	531	};
1c79356b A	532
1c79356b A	533	DOMAIN_SET(key);