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-rw-r--r--sys/netipsec/keysock.c603
1 files changed, 603 insertions, 0 deletions
diff --git a/sys/netipsec/keysock.c b/sys/netipsec/keysock.c
new file mode 100644
index 000000000000..39f57e5ea6e8
--- /dev/null
+++ b/sys/netipsec/keysock.c
@@ -0,0 +1,603 @@
+/* $FreeBSD$ */
+/* $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun 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.
+ */
+
+#include "opt_ipsec.h"
+
+/* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/domain.h>
+#include <sys/errno.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/protosw.h>
+#include <sys/signalvar.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/sysctl.h>
+#include <sys/systm.h>
+
+#include <net/raw_cb.h>
+#include <net/route.h>
+
+#include <net/pfkeyv2.h>
+#include <netipsec/key.h>
+#include <netipsec/keysock.h>
+#include <netipsec/key_debug.h>
+
+#include <machine/stdarg.h>
+
+struct key_cb {
+ int key_count;
+ int any_count;
+};
+static struct key_cb key_cb;
+
+static struct sockaddr key_dst = { 2, PF_KEY, };
+static struct sockaddr key_src = { 2, PF_KEY, };
+
+static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
+
+struct pfkeystat pfkeystat;
+
+/*
+ * key_output()
+ */
+int
+#if __STDC__
+key_output(struct mbuf *m, ...)
+#else
+key_output(m, va_alist)
+ struct mbuf *m;
+ va_dcl
+#endif
+{
+ struct sadb_msg *msg;
+ int len, error = 0;
+ int s;
+ struct socket *so;
+ va_list ap;
+
+ va_start(ap, m);
+ so = va_arg(ap, struct socket *);
+ va_end(ap);
+
+ if (m == 0)
+ panic("key_output: NULL pointer was passed.\n");
+
+ pfkeystat.out_total++;
+ pfkeystat.out_bytes += m->m_pkthdr.len;
+
+ len = m->m_pkthdr.len;
+ if (len < sizeof(struct sadb_msg)) {
+ 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) {
+ pfkeystat.out_nomem++;
+ error = ENOBUFS;
+ goto end;
+ }
+ }
+
+ if ((m->m_flags & M_PKTHDR) == 0)
+ panic("key_output: not M_PKTHDR ??");
+
+ KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
+
+ msg = mtod(m, struct sadb_msg *);
+ pfkeystat.out_msgtype[msg->sadb_msg_type]++;
+ if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
+ pfkeystat.out_invlen++;
+ error = EINVAL;
+ goto end;
+ }
+
+ /*XXX giant lock*/
+ s = splnet();
+ error = key_parse(m, so);
+ m = NULL;
+ splx(s);
+end:
+ if (m)
+ m_freem(m);
+ 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) {
+ 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? */
+
+ pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
+ }
+
+ if (!sbappendaddr(&rp->rcb_socket->so_rcv, (struct sockaddr *)&key_src,
+ m, NULL)) {
+ pfkeystat.in_nomem++;
+ m_freem(m);
+ error = ENOBUFS;
+ } else
+ error = 0;
+ sorwakeup(rp->rcb_socket);
+ return error;
+}
+
+/* XXX this interface should be obsoleted. */
+int
+key_sendup(so, msg, len, target)
+ struct socket *so;
+ struct sadb_msg *msg;
+ u_int len;
+ int target; /*target of the resulting message*/
+{
+ struct mbuf *m, *n, *mprev;
+ int tlen;
+
+ /* sanity check */
+ if (so == 0 || msg == 0)
+ panic("key_sendup: NULL pointer was passed.\n");
+
+ KEYDEBUG(KEYDEBUG_KEY_DUMP,
+ printf("key_sendup: \n");
+ kdebug_sadb(msg));
+
+ /*
+ * we increment statistics here, just in case we have ENOBUFS
+ * in this function.
+ */
+ pfkeystat.in_total++;
+ pfkeystat.in_bytes += len;
+ pfkeystat.in_msgtype[msg->sadb_msg_type]++;
+
+ /*
+ * Get mbuf chain whenever possible (not clusters),
+ * to save socket buffer. We'll be generating many SADB_ACQUIRE
+ * messages to listening key sockets. If we simply allocate clusters,
+ * sbappendaddr() will raise ENOBUFS due to too little sbspace().
+ * sbspace() computes # of actual data bytes AND mbuf region.
+ *
+ * TODO: SADB_ACQUIRE filters should be implemented.
+ */
+ tlen = len;
+ m = mprev = NULL;
+ while (tlen > 0) {
+ if (tlen == len) {
+ MGETHDR(n, M_DONTWAIT, MT_DATA);
+ n->m_len = MHLEN;
+ } else {
+ MGET(n, M_DONTWAIT, MT_DATA);
+ n->m_len = MLEN;
+ }
+ if (!n) {
+ pfkeystat.in_nomem++;
+ return ENOBUFS;
+ }
+ if (tlen >= MCLBYTES) { /*XXX better threshold? */
+ MCLGET(n, M_DONTWAIT);
+ if ((n->m_flags & M_EXT) == 0) {
+ m_free(n);
+ m_freem(m);
+ pfkeystat.in_nomem++;
+ return ENOBUFS;
+ }
+ n->m_len = MCLBYTES;
+ }
+
+ if (tlen < n->m_len)
+ n->m_len = tlen;
+ n->m_next = NULL;
+ if (m == NULL)
+ m = mprev = n;
+ else {
+ mprev->m_next = n;
+ mprev = n;
+ }
+ tlen -= n->m_len;
+ n = NULL;
+ }
+ m->m_pkthdr.len = len;
+ m->m_pkthdr.rcvif = NULL;
+ m_copyback(m, 0, len, (caddr_t)msg);
+
+ /* avoid duplicated statistics */
+ pfkeystat.in_total--;
+ pfkeystat.in_bytes -= len;
+ pfkeystat.in_msgtype[msg->sadb_msg_type]--;
+
+ return key_sendup_mbuf(so, m, target);
+}
+
+/* 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");
+
+ pfkeystat.in_total++;
+ pfkeystat.in_bytes += m->m_pkthdr.len;
+ if (m->m_len < sizeof(struct sadb_msg)) {
+#if 1
+ m = m_pullup(m, sizeof(struct sadb_msg));
+ if (m == NULL) {
+ 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 *);
+ pfkeystat.in_msgtype[msg->sadb_msg_type]++;
+ }
+
+ 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;
+
+ /*
+ * 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)
+ continue;
+
+ sendup = 0;
+ switch (target) {
+ case KEY_SENDUP_ONE:
+ /* the statement has no effect */
+ if (so && sotorawcb(so) == rp)
+ sendup++;
+ break;
+ case KEY_SENDUP_ALL:
+ sendup++;
+ break;
+ case KEY_SENDUP_REGISTERED:
+ if (kp->kp_registered)
+ sendup++;
+ break;
+ }
+ pfkeystat.in_msgtarget[target]++;
+
+ if (!sendup)
+ continue;
+
+ if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
+ m_freem(m);
+ pfkeystat.in_nomem++;
+ return ENOBUFS;
+ }
+
+ if ((error = key_sendup0(rp, n, 0)) != 0) {
+ m_freem(m);
+ return error;
+ }
+
+ n = NULL;
+ }
+
+ if (so) {
+ error = key_sendup0(sotorawcb(so), m, 0);
+ 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 s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_abort(so);
+ splx(s);
+ return error;
+}
+
+/*
+ * key_attach()
+ * derived from net/rtsock.c:rts_attach()
+ */
+static int
+key_attach(struct socket *so, int proto, struct thread *td)
+{
+ struct keycb *kp;
+ int s, error;
+
+ if (sotorawcb(so) != 0)
+ return EISCONN; /* XXX panic? */
+ kp = (struct keycb *)malloc(sizeof *kp, M_PCB, M_WAITOK|M_ZERO); /* XXX */
+ if (kp == 0)
+ return ENOBUFS;
+
+ /*
+ * The splnet() is necessary to block protocols from sending
+ * error notifications (like RTM_REDIRECT or RTM_LOSING) while
+ * this PCB is extant but incompletely initialized.
+ * Probably we should try to do more of this work beforehand and
+ * eliminate the spl.
+ */
+ s = splnet();
+ so->so_pcb = (caddr_t)kp;
+ error = raw_usrreqs.pru_attach(so, proto, td);
+ kp = (struct keycb *)sotorawcb(so);
+ if (error) {
+ free(kp, M_PCB);
+ so->so_pcb = (caddr_t) 0;
+ splx(s);
+ return error;
+ }
+
+ kp->kp_promisc = kp->kp_registered = 0;
+
+ if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
+ key_cb.key_count++;
+ key_cb.any_count++;
+ kp->kp_raw.rcb_laddr = &key_src;
+ kp->kp_raw.rcb_faddr = &key_dst;
+ soisconnected(so);
+ so->so_options |= SO_USELOOPBACK;
+
+ splx(s);
+ return 0;
+}
+
+/*
+ * key_bind()
+ * derived from net/rtsock.c:rts_bind()
+ */
+static int
+key_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
+{
+ int s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */
+ splx(s);
+ return error;
+}
+
+/*
+ * key_connect()
+ * derived from net/rtsock.c:rts_connect()
+ */
+static int
+key_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
+{
+ int s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */
+ splx(s);
+ 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 s, error;
+
+ s = splnet();
+ if (kp != 0) {
+ if (kp->kp_raw.rcb_proto.sp_protocol
+ == PF_KEY) /* XXX: AF_KEY */
+ key_cb.key_count--;
+ key_cb.any_count--;
+
+ key_freereg(so);
+ }
+ error = raw_usrreqs.pru_detach(so);
+ splx(s);
+ return error;
+}
+
+/*
+ * key_disconnect()
+ * derived from net/rtsock.c:key_disconnect()
+ */
+static int
+key_disconnect(struct socket *so)
+{
+ int s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_disconnect(so);
+ splx(s);
+ return error;
+}
+
+/*
+ * key_peeraddr()
+ * derived from net/rtsock.c:rts_peeraddr()
+ */
+static int
+key_peeraddr(struct socket *so, struct sockaddr **nam)
+{
+ int s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_peeraddr(so, nam);
+ splx(s);
+ 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 thread *td)
+{
+ int s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_send(so, flags, m, nam, control, td);
+ splx(s);
+ return error;
+}
+
+/*
+ * key_shutdown()
+ * derived from net/rtsock.c:rts_shutdown()
+ */
+static int
+key_shutdown(struct socket *so)
+{
+ int s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_shutdown(so);
+ splx(s);
+ return error;
+}
+
+/*
+ * key_sockaddr()
+ * derived from net/rtsock.c:rts_sockaddr()
+ */
+static int
+key_sockaddr(struct socket *so, struct sockaddr **nam)
+{
+ int s, error;
+ s = splnet();
+ error = raw_usrreqs.pru_sockaddr(so, nam);
+ splx(s);
+ 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, sopoll
+};
+
+/* sysctl */
+SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 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,
+ 0, (pr_output_t *)key_output, raw_ctlinput, 0,
+ 0,
+ raw_init, 0, 0, 0,
+ &key_usrreqs
+}
+};
+
+static void
+key_init0(void)
+{
+ bzero((caddr_t)&key_cb, sizeof(key_cb));
+ key_init();
+}
+
+struct domain keydomain =
+ { PF_KEY, "key", key_init0, 0, 0,
+ keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])] };
+
+DOMAIN_SET(key);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-04 15:51:50 +0000