2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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32 /* KAME @(#)$Id: keysock.c,v 1.2 1999/08/16 19:30:36 shin Exp $ */
34 /* This code has derived from sys/net/rtsock.c on FreeBSD2.2.5 */
36 #include <opt_ipsec.h>
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 <machine/ipl.h>
53 #include <net/raw_cb.h>
54 #include <net/route.h>
56 #include <net/pfkeyv2.h>
57 #include <netkey/keydb.h>
58 #include <netkey/key.h>
59 #include <netkey/keysock.h>
61 #include <netkey/key_debug.h>
63 #define KEYDEBUG(lev,arg)
66 #include <machine/stdarg.h>
68 static MALLOC_DEFINE(M_SECA, "key mgmt",
69 "security associations, key management");
71 struct sockaddr key_dst = { 2, PF_KEY, };
72 struct sockaddr key_src = { 2, PF_KEY, };
73 struct sockproto key_proto = { PF_KEY, PF_KEY_V2 };
75 static int key_sendup0 __P((struct rawcb *, struct mbuf *, int));
77 #define KMALLOC(p, t, n) \
78 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT))
80 free((caddr_t)(p), M_SECA);
84 * derived from net/rtsock.c:rts_abort()
87 key_abort(struct socket *so)
91 error = raw_usrreqs.pru_abort(so);
98 * derived from net/rtsock.c:rts_attach()
101 key_attach(struct socket *so, int proto, struct proc *p)
106 if (sotorawcb(so) != 0)
107 return EISCONN; /* XXX panic? */
108 MALLOC(kp, struct keycb *, sizeof *kp, M_PCB, M_WAITOK); /* XXX */
111 bzero(kp, sizeof *kp);
114 * The splnet() is necessary to block protocols from sending
115 * error notifications (like RTM_REDIRECT or RTM_LOSING) while
116 * this PCB is extant but incompletely initialized.
117 * Probably we should try to do more of this work beforehand and
121 so->so_pcb = (caddr_t)kp;
122 error = raw_usrreqs.pru_attach(so, proto, p);
123 kp = (struct keycb *)sotorawcb(so);
126 so->so_pcb = (caddr_t) 0;
128 printf("key_usrreq: key_usrreq results %d\n", error);
132 kp->kp_promisc = kp->kp_registered = 0;
134 if (kp->kp_raw.rcb_proto.sp_protocol == PF_KEY) /* XXX: AF_KEY */
137 kp->kp_raw.rcb_laddr = &key_src;
138 kp->kp_raw.rcb_faddr = &key_dst;
140 so->so_options |= SO_USELOOPBACK;
148 * derived from net/rtsock.c:rts_bind()
151 key_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
155 error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */
162 * derived from net/rtsock.c:rts_connect()
165 key_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
169 error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */
176 * derived from net/rtsock.c:rts_detach()
179 key_detach(struct socket *so)
181 struct keycb *kp = (struct keycb *)sotorawcb(so);
186 if (kp->kp_raw.rcb_proto.sp_protocol
187 == PF_KEY) /* XXX: AF_KEY */
193 error = raw_usrreqs.pru_detach(so);
200 * derived from net/rtsock.c:key_disconnect()
203 key_disconnect(struct socket *so)
207 error = raw_usrreqs.pru_disconnect(so);
214 * derived from net/rtsock.c:rts_peeraddr()
217 key_peeraddr(struct socket *so, struct sockaddr **nam)
221 error = raw_usrreqs.pru_peeraddr(so, nam);
228 * derived from net/rtsock.c:rts_send()
231 key_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
232 struct mbuf *control, struct proc *p)
236 error = raw_usrreqs.pru_send(so, flags, m, nam, control, p);
243 * derived from net/rtsock.c:rts_shutdown()
246 key_shutdown(struct socket *so)
250 error = raw_usrreqs.pru_shutdown(so);
257 * derived from net/rtsock.c:rts_sockaddr()
260 key_sockaddr(struct socket *so, struct sockaddr **nam)
264 error = raw_usrreqs.pru_sockaddr(so, nam);
269 struct pr_usrreqs key_usrreqs = {
270 key_abort, pru_accept_notsupp, key_attach, key_bind,
272 pru_connect2_notsupp, pru_control_notsupp, key_detach,
273 key_disconnect, pru_listen_notsupp, key_peeraddr,
275 pru_rcvoob_notsupp, key_send, pru_sense_null, key_shutdown,
276 key_sockaddr, sosend, soreceive, sopoll
283 key_output(struct mbuf *m, struct socket *so)
285 struct sadb_msg *msg = NULL;
291 panic("key_output: NULL pointer was passed.\n");
293 if (m->m_len < sizeof(long)
294 && (m = m_pullup(m, 8)) == 0) {
295 printf("key_output: can't pullup mbuf\n");
300 if ((m->m_flags & M_PKTHDR) == 0)
301 panic("key_output: not M_PKTHDR ??");
303 #if defined(IPSEC_DEBUG)
304 KEYDEBUG(KEYDEBUG_KEY_DUMP, kdebug_mbuf(m));
305 #endif /* defined(IPSEC_DEBUG) */
307 len = m->m_pkthdr.len;
308 if (len < sizeof(struct sadb_msg)
309 || len != PFKEY_UNUNIT64(mtod(m, struct sadb_msg *)->sadb_msg_len)) {
310 printf("key_output: Invalid message length.\n");
316 * allocate memory for sadb_msg, and copy to sadb_msg from mbuf
317 * XXX: To be processed directly without a copy.
319 KMALLOC(msg, struct sadb_msg *, len);
321 printf("key_output: No more memory.\n");
326 m_copydata(m, 0, len, (caddr_t)msg);
330 if ((len = key_parse(&msg, so, &target)) == 0) {
331 /* discard. i.e. no need to reply. */
337 /* send up message to the socket */
338 error = key_sendup(so, msg, len, target);
347 * send message to the socket.
350 key_sendup0(rp, m, promisc)
356 struct sadb_msg *pmsg;
358 M_PREPEND(m, sizeof(struct sadb_msg), M_NOWAIT);
359 if (m && m->m_len < sizeof(struct sadb_msg))
360 m = m_pullup(m, sizeof(struct sadb_msg));
362 printf("key_sendup0: cannot pullup\n");
366 m->m_pkthdr.len += sizeof(*pmsg);
368 pmsg = mtod(m, struct sadb_msg *);
369 bzero(pmsg, sizeof(*pmsg));
370 pmsg->sadb_msg_version = PF_KEY_V2;
371 pmsg->sadb_msg_type = SADB_X_PROMISC;
372 pmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
376 if (!sbappendaddr(&rp->rcb_socket->so_rcv,
377 (struct sockaddr *)&key_src, m, NULL)) {
378 printf("key_sendup0: sbappendaddr failed\n");
382 sorwakeup(rp->rcb_socket);
387 key_sendup(so, msg, len, target)
389 struct sadb_msg *msg;
391 int target; /*target of the resulting message*/
393 struct mbuf *m, *n, *mprev;
401 if (so == 0 || msg == 0)
402 panic("key_sendup: NULL pointer was passed.\n");
404 KEYDEBUG(KEYDEBUG_KEY_DUMP,
405 printf("key_sendup: \n");
409 * Get mbuf chain whenever possible (not clusters),
410 * to save socket buffer. We'll be generating many SADB_ACQUIRE
411 * messages to listening key sockets. If we simmply allocate clusters,
412 * sbappendaddr() will raise ENOBUFS due to too little sbspace().
413 * sbspace() computes # of actual data bytes AND mbuf region.
415 * TODO: SADB_ACQUIRE filters should be implemented.
421 MGETHDR(n, M_DONTWAIT, MT_DATA);
424 MGET(n, M_DONTWAIT, MT_DATA);
429 if (tlen > MCLBYTES) { /*XXX better threshold? */
430 MCLGET(n, M_DONTWAIT);
431 if ((n->m_flags & M_EXT) == 0) {
451 m->m_pkthdr.len = len;
452 m->m_pkthdr.rcvif = NULL;
453 m_copyback(m, 0, len, (caddr_t)msg);
455 LIST_FOREACH(rp, &rawcb_list, list)
457 if (rp->rcb_proto.sp_family != PF_KEY)
459 if (rp->rcb_proto.sp_protocol
460 && rp->rcb_proto.sp_protocol != PF_KEY_V2) {
464 kp = (struct keycb *)rp;
467 * If you are in promiscuous mode, and when you get broadcasted
468 * reply, you'll get two PF_KEY messages.
469 * (based on pf_key@inner.net message on 14 Oct 1998)
471 if (((struct keycb *)rp)->kp_promisc) {
472 if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
473 (void)key_sendup0(rp, n, 1);
478 /* the exact target will be processed later */
479 if (sotorawcb(so) == rp)
485 /* the statement has no effect */
486 if (sotorawcb(so) == rp)
492 case KEY_SENDUP_REGISTERED:
493 if (kp->kp_registered)
501 if ((n = m_copy(m, 0, (int)M_COPYALL)) == NULL) {
502 printf("key_sendup: m_copy fail\n");
507 if ((error = key_sendup0(rp, n, 0)) != 0) {
515 error = key_sendup0(sotorawcb(so), m, 0);
521 SYSCTL_NODE(_net, PF_KEY, key, CTLFLAG_RW, 0, "Key Family");
524 * Definitions of protocols supported in the KEY domain.
527 extern struct domain keydomain;
529 struct protosw keysw[] = {
530 { SOCK_RAW, &keydomain, PF_KEY_V2, PR_ATOMIC|PR_ADDR,
531 0, key_output, raw_ctlinput, 0,
538 struct domain keydomain =
539 { PF_KEY, "key", key_init, 0, 0,
540 keysw, &keysw[sizeof(keysw)/sizeof(keysw[0])] };