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>
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.");
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))) == NULL) {
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, &key_src, m, NULL)) {
162 pfkeystat.in_nomem++;
168 lwkt_reltoken(&key_token);
169 sorwakeup(rp->rcb_socket);
174 * XXX this interface should be obsoleted.
177 * target: target of the resulting message
180 key_sendup(struct socket *so, struct sadb_msg *msg, u_int len,
183 struct mbuf *m, *n, *mprev;
187 if (so == NULL || msg == NULL)
188 panic("key_sendup: NULL pointer was passed.");
190 KEYDEBUG(KEYDEBUG_KEY_DUMP,
191 kprintf("key_sendup: \n");
195 * we increment statistics here, just in case we have ENOBUFS
198 pfkeystat.in_total++;
199 pfkeystat.in_bytes += len;
200 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
203 * Get mbuf chain whenever possible (not clusters),
204 * to save socket buffer. We'll be generating many SADB_ACQUIRE
205 * messages to listening key sockets. If we simply allocate clusters,
206 * ssb_appendaddr() will raise ENOBUFS due to too little ssb_space().
207 * ssb_space() computes # of actual data bytes AND mbuf region.
209 * TODO: SADB_ACQUIRE filters should be implemented.
215 MGETHDR(n, MB_DONTWAIT, MT_DATA);
218 MGET(n, MB_DONTWAIT, MT_DATA);
222 pfkeystat.in_nomem++;
225 if (tlen >= MCLBYTES) { /*XXX better threshold? */
226 MCLGET(n, MB_DONTWAIT);
227 if ((n->m_flags & M_EXT) == 0) {
230 pfkeystat.in_nomem++;
248 m->m_pkthdr.len = len;
249 m->m_pkthdr.rcvif = NULL;
250 m_copyback(m, 0, len, (caddr_t)msg);
252 /* avoid duplicated statistics */
253 pfkeystat.in_total--;
254 pfkeystat.in_bytes -= len;
255 pfkeystat.in_msgtype[msg->sadb_msg_type]--;
257 return key_sendup_mbuf(so, m, target);
260 /* so can be NULL if target != KEY_SENDUP_ONE */
262 key_sendup_mbuf(struct socket *so, struct mbuf *m, int target)
271 panic("key_sendup_mbuf: NULL pointer was passed.");
272 if (so == NULL && target == KEY_SENDUP_ONE)
273 panic("key_sendup_mbuf: NULL pointer was passed.");
275 pfkeystat.in_total++;
276 pfkeystat.in_bytes += m->m_pkthdr.len;
277 if (m->m_len < sizeof(struct sadb_msg)) {
279 m = m_pullup(m, sizeof(struct sadb_msg));
281 pfkeystat.in_nomem++;
285 /* don't bother pulling it up just for stats */
288 if (m->m_len >= sizeof(struct sadb_msg)) {
289 struct sadb_msg *msg;
290 msg = mtod(m, struct sadb_msg *);
291 pfkeystat.in_msgtype[msg->sadb_msg_type]++;
294 lwkt_gettoken(&key_token);
296 LIST_FOREACH(rp, &rawcb_list, list)
298 if (rp->rcb_proto.sp_family != PF_KEY)
300 if (rp->rcb_proto.sp_protocol
301 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
305 kp = (struct keycb *)rp;
308 * If you are in promiscuous mode, and when you get broadcasted
309 * reply, you'll get two PF_KEY messages.
310 * (based on pf_key@inner.net message on 14 Oct 1998)
312 if (((struct keycb *)rp)->kp_promisc) {
313 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
314 key_sendup0(rp, n, 1);
319 /* the exact target will be processed later */
320 if (so && sotorawcb(so) == rp)
326 /* the statement has no effect */
327 if (so && sotorawcb(so) == rp)
333 case KEY_SENDUP_REGISTERED:
334 if (kp->kp_registered)
338 pfkeystat.in_msgtarget[target]++;
343 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
345 pfkeystat.in_nomem++;
346 lwkt_reltoken(&key_token);
350 if ((error = key_sendup0(rp, n, 0)) != 0) {
351 lwkt_reltoken(&key_token);
358 lwkt_reltoken(&key_token);
361 error = key_sendup0(sotorawcb(so), m, 0);
372 * derived from net/rtsock.c:rts_abort()
375 key_abort(netmsg_t msg)
377 lwkt_gettoken(&key_token);
379 raw_usrreqs.pru_abort(msg);
380 /* msg invalid now */
382 lwkt_reltoken(&key_token);
387 * derived from net/rtsock.c:rts_attach()
390 key_attach(netmsg_t msg)
392 struct socket *so = msg->attach.base.nm_so;
393 int proto = msg->attach.nm_proto;
394 struct pru_attach_info *ai = msg->attach.nm_ai;
396 struct netmsg_pru_attach smsg;
399 if (sotorawcb(so) != 0) {
400 error = EISCONN; /* XXX panic? */
405 kp = kmalloc(sizeof *kp, M_PCB, M_WAITOK | M_ZERO);
408 * The critical section is necessary to block protocols from sending
409 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
410 * this PCB is extant but incompletely initialized.
411 * Probably we should try to do more of this work beforehand and
412 * eliminate the critical section.
414 lwkt_gettoken(&key_token);
415 so->so_pcb = (caddr_t)kp;
417 netmsg_init(&smsg.base, so, &netisr_adone_rport, 0,
418 raw_usrreqs.pru_attach);
419 smsg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
420 smsg.base.lmsg.ms_flags |= MSGF_SYNC;
421 smsg.nm_proto = proto;
423 raw_usrreqs.pru_attach((netmsg_t)&smsg);
424 error = smsg.base.lmsg.ms_error;
426 kp = (struct keycb *)sotorawcb(so);
429 so->so_pcb = (caddr_t) 0;
430 lwkt_reltoken(&key_token);
434 kp->kp_promisc = kp->kp_registered = 0;
436 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
439 kp->kp_raw.rcb_laddr = &key_src;
440 kp->kp_raw.rcb_faddr = &key_dst;
442 so->so_options |= SO_USELOOPBACK;
444 lwkt_reltoken(&key_token);
447 lwkt_replymsg(&msg->attach.base.lmsg, error);
452 * derived from net/rtsock.c:rts_bind()
455 key_bind(netmsg_t msg)
457 lwkt_gettoken(&key_token);
459 raw_usrreqs.pru_bind(msg); /* xxx just EINVAL */
460 /* msg invalid now */
462 lwkt_reltoken(&key_token);
467 * derived from net/rtsock.c:rts_connect()
470 key_connect(netmsg_t msg)
472 lwkt_gettoken(&key_token);
474 raw_usrreqs.pru_connect(msg); /* XXX just EINVAL */
475 /* msg invalid now */
477 lwkt_reltoken(&key_token);
482 * derived from net/rtsock.c:rts_detach()
485 key_detach(netmsg_t msg)
487 struct socket *so = msg->detach.base.nm_so;
488 struct keycb *kp = (struct keycb *)sotorawcb(so);
490 lwkt_gettoken(&key_token);
493 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) {
501 raw_usrreqs.pru_detach(msg);
502 /* msg invalid now */
504 lwkt_reltoken(&key_token);
509 * derived from net/rtsock.c:key_disconnect()
512 key_disconnect(netmsg_t msg)
514 lwkt_gettoken(&key_token);
516 raw_usrreqs.pru_disconnect(msg);
517 /* msg invalid now */
519 lwkt_reltoken(&key_token);
524 * derived from net/rtsock.c:rts_peeraddr()
527 key_peeraddr(netmsg_t msg)
529 lwkt_gettoken(&key_token);
531 raw_usrreqs.pru_peeraddr(msg);
532 /* msg invalid now */
534 lwkt_reltoken(&key_token);
539 * derived from net/rtsock.c:rts_send()
542 key_send(netmsg_t msg)
544 lwkt_gettoken(&key_token);
546 raw_usrreqs.pru_send(msg);
547 /* msg invalid now */
549 lwkt_reltoken(&key_token);
554 * derived from net/rtsock.c:rts_shutdown()
557 key_shutdown(netmsg_t msg)
559 lwkt_gettoken(&key_token);
561 raw_usrreqs.pru_shutdown(msg);
562 /* msg invalid now */
564 lwkt_reltoken(&key_token);
569 * derived from net/rtsock.c:rts_sockaddr()
572 key_sockaddr(netmsg_t msg)
574 lwkt_gettoken(&key_token);
576 raw_usrreqs.pru_sockaddr(msg);
577 /* msg invalid now */
579 lwkt_reltoken(&key_token);
582 struct pr_usrreqs key_usrreqs = {
583 .pru_abort = key_abort,
584 .pru_accept = pr_generic_notsupp,
585 .pru_attach = key_attach,
586 .pru_bind = key_bind,
587 .pru_connect = key_connect,
588 .pru_connect2 = pr_generic_notsupp,
589 .pru_control = pr_generic_notsupp,
590 .pru_detach = key_detach,
591 .pru_disconnect = key_disconnect,
592 .pru_listen = pr_generic_notsupp,
593 .pru_peeraddr = key_peeraddr,
594 .pru_rcvd = pr_generic_notsupp,
595 .pru_rcvoob = pr_generic_notsupp,
596 .pru_send = key_send,
597 .pru_sense = pru_sense_null,
598 .pru_shutdown = key_shutdown,
599 .pru_sockaddr = key_sockaddr,
600 .pru_sosend = sosend,
601 .pru_soreceive = soreceive
605 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
608 * Definitions of protocols supported in the KEY domain.
611 extern struct domain keydomain;
613 struct protosw keysw[] = {
616 .pr_domain = &keydomain,
617 .pr_protocol = PF_KEY_V2,
618 .pr_flags = PR_ATOMIC|PR_ADDR,
621 .pr_output = key_output,
622 .pr_ctlinput = raw_ctlinput,
623 .pr_ctloutput = NULL,
625 .pr_ctlport = cpu0_ctlport,
627 .pr_usrreqs = &key_usrreqs
631 struct domain keydomain = {
632 PF_KEY, "key", key_init, NULL, NULL,
633 keysw, &keysw[NELEM(keysw)],