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 * $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>
49 #include <sys/socketvar2.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.");
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))) == NULL) {
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, &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 == NULL || msg == NULL)
189 panic("key_sendup: NULL pointer was passed.");
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.");
273 if (so == NULL && target == KEY_SENDUP_ONE)
274 panic("key_sendup_mbuf: NULL pointer was passed.");
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) != NULL) {
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;
417 soreference(so); /* so_pcb assignment */
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 atomic_add_int(&so->so_refs, -1);
432 so->so_pcb = (caddr_t) 0;
433 lwkt_reltoken(&key_token);
437 kp->kp_promisc = kp->kp_registered = 0;
439 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
442 kp->kp_raw.rcb_laddr = &key_src;
443 kp->kp_raw.rcb_faddr = &key_dst;
445 so->so_options |= SO_USELOOPBACK;
447 lwkt_reltoken(&key_token);
450 lwkt_replymsg(&msg->attach.base.lmsg, error);
455 * derived from net/rtsock.c:rts_bind()
458 key_bind(netmsg_t msg)
460 lwkt_gettoken(&key_token);
462 raw_usrreqs.pru_bind(msg); /* xxx just EINVAL */
463 /* msg invalid now */
465 lwkt_reltoken(&key_token);
470 * derived from net/rtsock.c:rts_connect()
473 key_connect(netmsg_t msg)
475 lwkt_gettoken(&key_token);
477 raw_usrreqs.pru_connect(msg); /* XXX just EINVAL */
478 /* msg invalid now */
480 lwkt_reltoken(&key_token);
485 * derived from net/rtsock.c:rts_detach()
488 key_detach(netmsg_t msg)
490 struct socket *so = msg->detach.base.nm_so;
491 struct keycb *kp = (struct keycb *)sotorawcb(so);
493 lwkt_gettoken(&key_token);
496 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) {
504 raw_usrreqs.pru_detach(msg);
505 /* msg invalid now */
507 lwkt_reltoken(&key_token);
512 * derived from net/rtsock.c:key_disconnect()
515 key_disconnect(netmsg_t msg)
517 lwkt_gettoken(&key_token);
519 raw_usrreqs.pru_disconnect(msg);
520 /* msg invalid now */
522 lwkt_reltoken(&key_token);
527 * derived from net/rtsock.c:rts_peeraddr()
530 key_peeraddr(netmsg_t msg)
532 lwkt_gettoken(&key_token);
534 raw_usrreqs.pru_peeraddr(msg);
535 /* msg invalid now */
537 lwkt_reltoken(&key_token);
542 * derived from net/rtsock.c:rts_send()
545 key_send(netmsg_t msg)
547 lwkt_gettoken(&key_token);
549 raw_usrreqs.pru_send(msg);
550 /* msg invalid now */
552 lwkt_reltoken(&key_token);
557 * derived from net/rtsock.c:rts_shutdown()
560 key_shutdown(netmsg_t msg)
562 lwkt_gettoken(&key_token);
564 raw_usrreqs.pru_shutdown(msg);
565 /* msg invalid now */
567 lwkt_reltoken(&key_token);
572 * derived from net/rtsock.c:rts_sockaddr()
575 key_sockaddr(netmsg_t msg)
577 lwkt_gettoken(&key_token);
579 raw_usrreqs.pru_sockaddr(msg);
580 /* msg invalid now */
582 lwkt_reltoken(&key_token);
585 struct pr_usrreqs key_usrreqs = {
586 .pru_abort = key_abort,
587 .pru_accept = pr_generic_notsupp,
588 .pru_attach = key_attach,
589 .pru_bind = key_bind,
590 .pru_connect = key_connect,
591 .pru_connect2 = pr_generic_notsupp,
592 .pru_control = pr_generic_notsupp,
593 .pru_detach = key_detach,
594 .pru_disconnect = key_disconnect,
595 .pru_listen = pr_generic_notsupp,
596 .pru_peeraddr = key_peeraddr,
597 .pru_rcvd = pr_generic_notsupp,
598 .pru_rcvoob = pr_generic_notsupp,
599 .pru_send = key_send,
600 .pru_sense = pru_sense_null,
601 .pru_shutdown = key_shutdown,
602 .pru_sockaddr = key_sockaddr,
603 .pru_sosend = sosend,
604 .pru_soreceive = soreceive
608 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
611 * Definitions of protocols supported in the KEY domain.
614 extern struct domain keydomain;
616 struct protosw keysw[] = {
619 .pr_domain = &keydomain,
620 .pr_protocol = PF_KEY_V2,
621 .pr_flags = PR_ATOMIC|PR_ADDR,
624 .pr_output = key_output,
625 .pr_ctlinput = raw_ctlinput,
626 .pr_ctloutput = NULL,
628 .pr_ctlport = cpu0_ctlport,
630 .pr_usrreqs = &key_usrreqs
634 struct domain keydomain = {
635 PF_KEY, "key", key_init, NULL, NULL,
636 keysw, &keysw[NELEM(keysw)],