2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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29 * $FreeBSD: src/sys/netkey/keysock.c,v 1.1.2.4 2003/01/11 19:10:59 ume Exp $
30 * $DragonFly: src/sys/netproto/key/keysock.c,v 1.21 2008/11/01 04:22:16 sephe Exp $
31 * $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $
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/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/sysctl.h>
44 #include <sys/malloc.h>
45 #include <sys/socket.h>
46 #include <sys/socketvar.h>
47 #include <sys/domain.h>
48 #include <sys/protosw.h>
49 #include <sys/errno.h>
51 #include <sys/thread2.h>
52 #include <sys/msgport2.h>
54 #include <net/raw_cb.h>
55 #include <net/route.h>
56 #include <net/netmsg.h>
57 #include <netinet/in.h>
59 #include <net/pfkeyv2.h>
60 #include <net/netmsg2.h>
65 #include "key_debug.h"
67 #include <machine/stdarg.h>
69 struct sockaddr key_dst = { 2, PF_KEY, };
70 struct sockaddr key_src = { 2, PF_KEY, };
72 static int key_sendup0 (struct rawcb *, struct mbuf *, int);
74 struct pfkeystat pfkeystat;
80 key_output(struct mbuf *m, struct socket *so, ...)
86 panic("key_output: NULL pointer was passed.\n");
88 pfkeystat.out_total++;
89 pfkeystat.out_bytes += m->m_pkthdr.len;
91 len = m->m_pkthdr.len;
92 if (len < sizeof(struct sadb_msg)) {
93 pfkeystat.out_tooshort++;
98 if (m->m_len < sizeof(struct sadb_msg)) {
99 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
100 pfkeystat.out_nomem++;
106 if ((m->m_flags & M_PKTHDR) == 0)
107 panic("key_output: not M_PKTHDR ??");
109 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
111 msg = mtod(m, struct sadb_msg *);
112 pfkeystat.out_msgtype[msg->sadb_msg_type]++;
113 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
114 pfkeystat.out_invlen++;
120 lwkt_gettoken(&key_token);
121 error = key_parse(m, so);
123 lwkt_reltoken(&key_token);
131 * send message to the socket.
134 key_sendup0(struct rawcb *rp, struct mbuf *m, int promisc)
139 struct sadb_msg *pmsg;
141 M_PREPEND(m, sizeof(struct sadb_msg), MB_DONTWAIT);
142 if (m && m->m_len < sizeof(struct sadb_msg))
143 m = m_pullup(m, sizeof(struct sadb_msg));
145 pfkeystat.in_nomem++;
149 m->m_pkthdr.len += sizeof(*pmsg);
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.in_msgtype[pmsg->sadb_msg_type]++;
161 lwkt_gettoken(&key_token);
162 if (!ssb_appendaddr(&rp->rcb_socket->so_rcv,
163 (struct sockaddr *)&key_src, m, NULL)) {
164 pfkeystat.in_nomem++;
170 lwkt_reltoken(&key_token);
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,
185 struct mbuf *m, *n, *mprev;
189 if (so == 0 || msg == 0)
190 panic("key_sendup: NULL pointer was passed.\n");
192 KEYDEBUG(KEYDEBUG_KEY_DUMP,
193 kprintf("key_sendup: \n");
197 * we increment statistics here, just in case we have ENOBUFS
200 pfkeystat.in_total++;
201 pfkeystat.in_bytes += len;
202 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
205 * Get mbuf chain whenever possible (not clusters),
206 * to save socket buffer. We'll be generating many SADB_ACQUIRE
207 * messages to listening key sockets. If we simply allocate clusters,
208 * ssb_appendaddr() will raise ENOBUFS due to too little ssb_space().
209 * ssb_space() computes # of actual data bytes AND mbuf region.
211 * TODO: SADB_ACQUIRE filters should be implemented.
217 MGETHDR(n, MB_DONTWAIT, MT_DATA);
220 MGET(n, MB_DONTWAIT, MT_DATA);
224 pfkeystat.in_nomem++;
227 if (tlen >= MCLBYTES) { /*XXX better threshold? */
228 MCLGET(n, MB_DONTWAIT);
229 if ((n->m_flags & M_EXT) == 0) {
232 pfkeystat.in_nomem++;
250 m->m_pkthdr.len = len;
251 m->m_pkthdr.rcvif = NULL;
252 m_copyback(m, 0, len, (caddr_t)msg);
254 /* avoid duplicated statistics */
255 pfkeystat.in_total--;
256 pfkeystat.in_bytes -= len;
257 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
259 return key_sendup_mbuf(so, m, target);
262 /* so can be NULL if target != KEY_SENDUP_ONE */
264 key_sendup_mbuf(struct socket *so, struct mbuf *m, int target)
273 panic("key_sendup_mbuf: NULL pointer was passed.\n");
274 if (so == NULL && target == KEY_SENDUP_ONE)
275 panic("key_sendup_mbuf: NULL pointer was passed.\n");
277 pfkeystat.in_total++;
278 pfkeystat.in_bytes += m->m_pkthdr.len;
279 if (m->m_len < sizeof(struct sadb_msg)) {
281 m = m_pullup(m, sizeof(struct sadb_msg));
283 pfkeystat.in_nomem++;
287 /* don't bother pulling it up just for stats */
290 if (m->m_len >= sizeof(struct sadb_msg)) {
291 struct sadb_msg *msg;
292 msg = mtod(m, struct sadb_msg *);
293 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
296 lwkt_gettoken(&key_token);
298 LIST_FOREACH(rp, &rawcb_list, list)
300 if (rp->rcb_proto.sp_family != PF_KEY)
302 if (rp->rcb_proto.sp_protocol
303 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
307 kp = (struct keycb *)rp;
310 * If you are in promiscuous mode, and when you get broadcasted
311 * reply, you'll get two PF_KEY messages.
312 * (based on pf_key@inner.net message on 14 Oct 1998)
314 if (((struct keycb *)rp)->kp_promisc) {
315 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
316 key_sendup0(rp, n, 1);
321 /* the exact target will be processed later */
322 if (so && sotorawcb(so) == rp)
328 /* the statement has no effect */
329 if (so && sotorawcb(so) == rp)
335 case KEY_SENDUP_REGISTERED:
336 if (kp->kp_registered)
340 pfkeystat.in_msgtarget[target]++;
345 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
347 pfkeystat.in_nomem++;
348 lwkt_reltoken(&key_token);
352 if ((error = key_sendup0(rp, n, 0)) != 0) {
353 lwkt_reltoken(&key_token);
360 lwkt_reltoken(&key_token);
363 error = key_sendup0(sotorawcb(so), m, 0);
374 * derived from net/rtsock.c:rts_abort()
377 key_abort(netmsg_t msg)
379 lwkt_gettoken(&key_token);
381 raw_usrreqs.pru_abort(msg);
382 /* msg invalid now */
384 lwkt_reltoken(&key_token);
389 * derived from net/rtsock.c:rts_attach()
392 key_attach(netmsg_t msg)
394 struct socket *so = msg->attach.base.nm_so;
395 int proto = msg->attach.nm_proto;
396 struct pru_attach_info *ai = msg->attach.nm_ai;
398 struct netmsg_pru_attach smsg;
401 if (sotorawcb(so) != 0) {
402 error = EISCONN; /* XXX panic? */
407 kp = kmalloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
410 * The critical section is necessary to block protocols from sending
411 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
412 * this PCB is extant but incompletely initialized.
413 * Probably we should try to do more of this work beforehand and
414 * eliminate the critical section.
416 lwkt_gettoken(&key_token);
417 so->so_pcb = (caddr_t)kp;
419 netmsg_init(&smsg.base, so, &netisr_adone_rport, 0,
420 raw_usrreqs.pru_attach);
421 smsg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
422 smsg.base.lmsg.ms_flags |= MSGF_SYNC;
423 smsg.nm_proto = proto;
425 raw_usrreqs.pru_attach((netmsg_t)&smsg);
426 error = smsg.base.lmsg.ms_error;
428 kp = (struct keycb *)sotorawcb(so);
431 so->so_pcb = (caddr_t) 0;
432 lwkt_reltoken(&key_token);
436 kp->kp_promisc = kp->kp_registered = 0;
438 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
441 kp->kp_raw.rcb_laddr = &key_src;
442 kp->kp_raw.rcb_faddr = &key_dst;
444 so->so_options |= SO_USELOOPBACK;
446 lwkt_reltoken(&key_token);
449 lwkt_replymsg(&msg->attach.base.lmsg, error);
454 * derived from net/rtsock.c:rts_bind()
457 key_bind(netmsg_t msg)
459 lwkt_gettoken(&key_token);
461 raw_usrreqs.pru_bind(msg); /* xxx just EINVAL */
462 /* msg invalid now */
464 lwkt_reltoken(&key_token);
469 * derived from net/rtsock.c:rts_connect()
472 key_connect(netmsg_t msg)
474 lwkt_gettoken(&key_token);
476 raw_usrreqs.pru_connect(msg); /* XXX just EINVAL */
477 /* msg invalid now */
479 lwkt_reltoken(&key_token);
484 * derived from net/rtsock.c:rts_detach()
487 key_detach(netmsg_t msg)
489 struct socket *so = msg->detach.base.nm_so;
490 struct keycb *kp = (struct keycb *)sotorawcb(so);
492 lwkt_gettoken(&key_token);
495 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) {
503 raw_usrreqs.pru_detach(msg);
504 /* msg invalid now */
506 lwkt_reltoken(&key_token);
511 * derived from net/rtsock.c:key_disconnect()
514 key_disconnect(netmsg_t msg)
516 lwkt_gettoken(&key_token);
518 raw_usrreqs.pru_disconnect(msg);
519 /* msg invalid now */
521 lwkt_reltoken(&key_token);
526 * derived from net/rtsock.c:rts_peeraddr()
529 key_peeraddr(netmsg_t msg)
531 lwkt_gettoken(&key_token);
533 raw_usrreqs.pru_peeraddr(msg);
534 /* msg invalid now */
536 lwkt_reltoken(&key_token);
541 * derived from net/rtsock.c:rts_send()
544 key_send(netmsg_t msg)
546 lwkt_gettoken(&key_token);
548 raw_usrreqs.pru_send(msg);
549 /* msg invalid now */
551 lwkt_reltoken(&key_token);
556 * derived from net/rtsock.c:rts_shutdown()
559 key_shutdown(netmsg_t msg)
561 lwkt_gettoken(&key_token);
563 raw_usrreqs.pru_shutdown(msg);
564 /* msg invalid now */
566 lwkt_reltoken(&key_token);
571 * derived from net/rtsock.c:rts_sockaddr()
574 key_sockaddr(netmsg_t msg)
576 lwkt_gettoken(&key_token);
578 raw_usrreqs.pru_sockaddr(msg);
579 /* msg invalid now */
581 lwkt_reltoken(&key_token);
584 struct pr_usrreqs key_usrreqs = {
585 .pru_abort = key_abort,
586 .pru_accept = pr_generic_notsupp,
587 .pru_attach = key_attach,
588 .pru_bind = key_bind,
589 .pru_connect = key_connect,
590 .pru_connect2 = pr_generic_notsupp,
591 .pru_control = pr_generic_notsupp,
592 .pru_detach = key_detach,
593 .pru_disconnect = key_disconnect,
594 .pru_listen = pr_generic_notsupp,
595 .pru_peeraddr = key_peeraddr,
596 .pru_rcvd = pr_generic_notsupp,
597 .pru_rcvoob = pr_generic_notsupp,
598 .pru_send = key_send,
599 .pru_sense = pru_sense_null,
600 .pru_shutdown = key_shutdown,
601 .pru_sockaddr = key_sockaddr,
602 .pru_sosend = sosend,
603 .pru_soreceive = soreceive
607 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
610 * Definitions of protocols supported in the KEY domain.
613 extern struct domain keydomain;
615 struct protosw keysw[] = {
618 .pr_domain = &keydomain,
619 .pr_protocol = PF_KEY_V2,
620 .pr_flags = PR_ATOMIC|PR_ADDR,
623 .pr_output = key_output,
624 .pr_ctlinput = raw_ctlinput,
625 .pr_ctloutput = NULL,
627 .pr_ctlport = cpu0_ctlport,
629 .pr_usrreqs = &key_usrreqs
633 struct domain keydomain = {
634 PF_KEY, "key", key_init, NULL, NULL,
635 keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])],