2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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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 * $KAME: keysock.c,v 1.25 2001/08/13 20:07:41 itojun Exp $
33 #include "opt_ipsec.h"
35 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
37 #include <sys/types.h>
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/sysctl.h>
43 #include <sys/malloc.h>
44 #include <sys/socket.h>
45 #include <sys/socketvar.h>
46 #include <sys/domain.h>
47 #include <sys/protosw.h>
48 #include <sys/errno.h>
50 #include <sys/thread2.h>
51 #include <sys/msgport2.h>
53 #include <net/raw_cb.h>
54 #include <net/route.h>
55 #include <net/netmsg.h>
56 #include <netinet/in.h>
58 #include <net/pfkeyv2.h>
59 #include <net/netmsg2.h>
64 #include "key_debug.h"
66 #include <machine/stdarg.h>
68 struct sockaddr key_dst = { 2, PF_KEY, };
69 struct sockaddr key_src = { 2, PF_KEY, };
71 static int key_sendup0 (struct rawcb *, struct mbuf *, int);
73 struct pfkeystat pfkeystat;
79 key_output(struct mbuf *m, struct socket *so, ...)
85 panic("key_output: NULL pointer was passed.\n");
87 pfkeystat.out_total++;
88 pfkeystat.out_bytes += m->m_pkthdr.len;
90 len = m->m_pkthdr.len;
91 if (len < sizeof(struct sadb_msg)) {
92 pfkeystat.out_tooshort++;
97 if (m->m_len < sizeof(struct sadb_msg)) {
98 if ((m = m_pullup(m, sizeof(struct sadb_msg))) == 0) {
99 pfkeystat.out_nomem++;
105 if ((m->m_flags & M_PKTHDR) == 0)
106 panic("key_output: not M_PKTHDR ??");
108 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
110 msg = mtod(m, struct sadb_msg *);
111 pfkeystat.out_msgtype[msg->sadb_msg_type]++;
112 if (len != PFKEY_UNUNIT64(msg->sadb_msg_len)) {
113 pfkeystat.out_invlen++;
119 lwkt_gettoken(&key_token);
120 error = key_parse(m, so);
122 lwkt_reltoken(&key_token);
130 * send message to the socket.
133 key_sendup0(struct rawcb *rp, struct mbuf *m, int promisc)
138 struct sadb_msg *pmsg;
140 M_PREPEND(m, sizeof(struct sadb_msg), MB_DONTWAIT);
141 if (m && m->m_len < sizeof(struct sadb_msg))
142 m = m_pullup(m, sizeof(struct sadb_msg));
144 pfkeystat.in_nomem++;
148 m->m_pkthdr.len += sizeof(*pmsg);
150 pmsg = mtod(m, struct sadb_msg *);
151 bzero(pmsg, sizeof(*pmsg));
152 pmsg->sadb_msg_version = PF_KEY_V2;
153 pmsg->sadb_msg_type = SADB_X_PROMISC;
154 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
157 pfkeystat.in_msgtype[pmsg->sadb_msg_type]++;
160 lwkt_gettoken(&key_token);
161 if (!ssb_appendaddr(&rp->rcb_socket->so_rcv,
162 (struct sockaddr *)&key_src, m, NULL)) {
163 pfkeystat.in_nomem++;
169 lwkt_reltoken(&key_token);
170 sorwakeup(rp->rcb_socket);
175 * XXX this interface should be obsoleted.
178 * target: target of the resulting message
181 key_sendup(struct socket *so, struct sadb_msg *msg, u_int len,
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.
216 MGETHDR(n, MB_DONTWAIT, MT_DATA);
219 MGET(n, MB_DONTWAIT, MT_DATA);
223 pfkeystat.in_nomem++;
226 if (tlen >= MCLBYTES) { /*XXX better threshold? */
227 MCLGET(n, MB_DONTWAIT);
228 if ((n->m_flags & M_EXT) == 0) {
231 pfkeystat.in_nomem++;
249 m->m_pkthdr.len = len;
250 m->m_pkthdr.rcvif = NULL;
251 m_copyback(m, 0, len, (caddr_t)msg);
253 /* avoid duplicated statistics */
254 pfkeystat.in_total--;
255 pfkeystat.in_bytes -= len;
256 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
258 return key_sendup_mbuf(so, m, target);
261 /* so can be NULL if target != KEY_SENDUP_ONE */
263 key_sendup_mbuf(struct socket *so, struct mbuf *m, int target)
272 panic("key_sendup_mbuf: NULL pointer was passed.\n");
273 if (so == NULL && target == KEY_SENDUP_ONE)
274 panic("key_sendup_mbuf: NULL pointer was passed.\n");
276 pfkeystat.in_total++;
277 pfkeystat.in_bytes += m->m_pkthdr.len;
278 if (m->m_len < sizeof(struct sadb_msg)) {
280 m = m_pullup(m, sizeof(struct sadb_msg));
282 pfkeystat.in_nomem++;
286 /* don't bother pulling it up just for stats */
289 if (m->m_len >= sizeof(struct sadb_msg)) {
290 struct sadb_msg *msg;
291 msg = mtod(m, struct sadb_msg *);
292 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
295 lwkt_gettoken(&key_token);
297 LIST_FOREACH(rp, &rawcb_list, list)
299 if (rp->rcb_proto.sp_family != PF_KEY)
301 if (rp->rcb_proto.sp_protocol
302 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
306 kp = (struct keycb *)rp;
309 * If you are in promiscuous mode, and when you get broadcasted
310 * reply, you'll get two PF_KEY messages.
311 * (based on pf_key@inner.net message on 14 Oct 1998)
313 if (((struct keycb *)rp)->kp_promisc) {
314 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
315 key_sendup0(rp, n, 1);
320 /* the exact target will be processed later */
321 if (so && sotorawcb(so) == rp)
327 /* the statement has no effect */
328 if (so && sotorawcb(so) == rp)
334 case KEY_SENDUP_REGISTERED:
335 if (kp->kp_registered)
339 pfkeystat.in_msgtarget[target]++;
344 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
346 pfkeystat.in_nomem++;
347 lwkt_reltoken(&key_token);
351 if ((error = key_sendup0(rp, n, 0)) != 0) {
352 lwkt_reltoken(&key_token);
359 lwkt_reltoken(&key_token);
362 error = key_sendup0(sotorawcb(so), m, 0);
373 * derived from net/rtsock.c:rts_abort()
376 key_abort(netmsg_t msg)
378 lwkt_gettoken(&key_token);
380 raw_usrreqs.pru_abort(msg);
381 /* msg invalid now */
383 lwkt_reltoken(&key_token);
388 * derived from net/rtsock.c:rts_attach()
391 key_attach(netmsg_t msg)
393 struct socket *so = msg->attach.base.nm_so;
394 int proto = msg->attach.nm_proto;
395 struct pru_attach_info *ai = msg->attach.nm_ai;
397 struct netmsg_pru_attach smsg;
400 if (sotorawcb(so) != 0) {
401 error = EISCONN; /* XXX panic? */
406 kp = kmalloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
409 * The critical section is necessary to block protocols from sending
410 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
411 * this PCB is extant but incompletely initialized.
412 * Probably we should try to do more of this work beforehand and
413 * eliminate the critical section.
415 lwkt_gettoken(&key_token);
416 so->so_pcb = (caddr_t)kp;
418 netmsg_init(&smsg.base, so, &netisr_adone_rport, 0,
419 raw_usrreqs.pru_attach);
420 smsg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
421 smsg.base.lmsg.ms_flags |= MSGF_SYNC;
422 smsg.nm_proto = proto;
424 raw_usrreqs.pru_attach((netmsg_t)&smsg);
425 error = smsg.base.lmsg.ms_error;
427 kp = (struct keycb *)sotorawcb(so);
430 so->so_pcb = (caddr_t) 0;
431 lwkt_reltoken(&key_token);
435 kp->kp_promisc = kp->kp_registered = 0;
437 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
440 kp->kp_raw.rcb_laddr = &key_src;
441 kp->kp_raw.rcb_faddr = &key_dst;
443 so->so_options |= SO_USELOOPBACK;
445 lwkt_reltoken(&key_token);
448 lwkt_replymsg(&msg->attach.base.lmsg, error);
453 * derived from net/rtsock.c:rts_bind()
456 key_bind(netmsg_t msg)
458 lwkt_gettoken(&key_token);
460 raw_usrreqs.pru_bind(msg); /* xxx just EINVAL */
461 /* msg invalid now */
463 lwkt_reltoken(&key_token);
468 * derived from net/rtsock.c:rts_connect()
471 key_connect(netmsg_t msg)
473 lwkt_gettoken(&key_token);
475 raw_usrreqs.pru_connect(msg); /* XXX just EINVAL */
476 /* msg invalid now */
478 lwkt_reltoken(&key_token);
483 * derived from net/rtsock.c:rts_detach()
486 key_detach(netmsg_t msg)
488 struct socket *so = msg->detach.base.nm_so;
489 struct keycb *kp = (struct keycb *)sotorawcb(so);
491 lwkt_gettoken(&key_token);
494 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) {
502 raw_usrreqs.pru_detach(msg);
503 /* msg invalid now */
505 lwkt_reltoken(&key_token);
510 * derived from net/rtsock.c:key_disconnect()
513 key_disconnect(netmsg_t msg)
515 lwkt_gettoken(&key_token);
517 raw_usrreqs.pru_disconnect(msg);
518 /* msg invalid now */
520 lwkt_reltoken(&key_token);
525 * derived from net/rtsock.c:rts_peeraddr()
528 key_peeraddr(netmsg_t msg)
530 lwkt_gettoken(&key_token);
532 raw_usrreqs.pru_peeraddr(msg);
533 /* msg invalid now */
535 lwkt_reltoken(&key_token);
540 * derived from net/rtsock.c:rts_send()
543 key_send(netmsg_t msg)
545 lwkt_gettoken(&key_token);
547 raw_usrreqs.pru_send(msg);
548 /* msg invalid now */
550 lwkt_reltoken(&key_token);
555 * derived from net/rtsock.c:rts_shutdown()
558 key_shutdown(netmsg_t msg)
560 lwkt_gettoken(&key_token);
562 raw_usrreqs.pru_shutdown(msg);
563 /* msg invalid now */
565 lwkt_reltoken(&key_token);
570 * derived from net/rtsock.c:rts_sockaddr()
573 key_sockaddr(netmsg_t msg)
575 lwkt_gettoken(&key_token);
577 raw_usrreqs.pru_sockaddr(msg);
578 /* msg invalid now */
580 lwkt_reltoken(&key_token);
583 struct pr_usrreqs key_usrreqs = {
584 .pru_abort = key_abort,
585 .pru_accept = pr_generic_notsupp,
586 .pru_attach = key_attach,
587 .pru_bind = key_bind,
588 .pru_connect = key_connect,
589 .pru_connect2 = pr_generic_notsupp,
590 .pru_control = pr_generic_notsupp,
591 .pru_detach = key_detach,
592 .pru_disconnect = key_disconnect,
593 .pru_listen = pr_generic_notsupp,
594 .pru_peeraddr = key_peeraddr,
595 .pru_rcvd = pr_generic_notsupp,
596 .pru_rcvoob = pr_generic_notsupp,
597 .pru_send = key_send,
598 .pru_sense = pru_sense_null,
599 .pru_shutdown = key_shutdown,
600 .pru_sockaddr = key_sockaddr,
601 .pru_sosend = sosend,
602 .pru_soreceive = soreceive
606 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
609 * Definitions of protocols supported in the KEY domain.
612 extern struct domain keydomain;
614 struct protosw keysw[] = {
617 .pr_domain = &keydomain,
618 .pr_protocol = PF_KEY_V2,
619 .pr_flags = PR_ATOMIC|PR_ADDR,
622 .pr_output = key_output,
623 .pr_ctlinput = raw_ctlinput,
624 .pr_ctloutput = NULL,
626 .pr_ctlport = cpu0_ctlport,
628 .pr_usrreqs = &key_usrreqs
632 struct domain keydomain = {
633 PF_KEY, "key", key_init, NULL, NULL,
634 keysw, &keysw[NELEM(keysw)],