ipx_usrreq.c revision 116189 
1/*
2 * Copyright (c) 1995, Mike Mitchell
3 * Copyright (c) 1984, 1985, 1986, 1987, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *	This product includes software developed by the University of
17 *	California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)ipx_usrreq.c
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/sys/netipx/ipx_usrreq.c 116189 2003-06-11 05:37:42Z obrien $");
39
40#include "opt_ipx.h"
41
42#include <sys/param.h>
43#include <sys/kernel.h>
44#include <sys/lock.h>
45#include <sys/mbuf.h>
46#include <sys/protosw.h>
47#include <sys/signalvar.h>
48#include <sys/socket.h>
49#include <sys/socketvar.h>
50#include <sys/sx.h>
51#include <sys/sysctl.h>
52#include <sys/systm.h>
53
54#include <net/if.h>
55#include <net/route.h>
56
57#include <netinet/in.h>
58
59#include <netipx/ipx.h>
60#include <netipx/ipx_if.h>
61#include <netipx/ipx_ip.h>
62#include <netipx/ipx_pcb.h>
63#include <netipx/ipx_var.h>
64
65/*
66 * IPX protocol implementation.
67 */
68
69static int ipxsendspace = IPXSNDQ;
70SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxsendspace, CTLFLAG_RW,
71            &ipxsendspace, 0, "");
72static int ipxrecvspace = IPXRCVQ;
73SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxrecvspace, CTLFLAG_RW,
74            &ipxrecvspace, 0, "");
75
76static	int ipx_usr_abort(struct socket *so);
77static	int ipx_attach(struct socket *so, int proto, struct thread *td);
78static	int ipx_bind(struct socket *so, struct sockaddr *nam, struct thread *td);
79static	int ipx_connect(struct socket *so, struct sockaddr *nam,
80			struct thread *td);
81static	int ipx_detach(struct socket *so);
82static	int ipx_disconnect(struct socket *so);
83static	int ipx_send(struct socket *so, int flags, struct mbuf *m,
84		     struct sockaddr *addr, struct mbuf *control,
85		     struct thread *td);
86static	int ipx_shutdown(struct socket *so);
87static	int ripx_attach(struct socket *so, int proto, struct thread *td);
88static	int ipx_output(struct ipxpcb *ipxp, struct mbuf *m0);
89
90struct	pr_usrreqs ipx_usrreqs = {
91	ipx_usr_abort, pru_accept_notsupp, ipx_attach, ipx_bind,
92	ipx_connect, pru_connect2_notsupp, ipx_control, ipx_detach,
93	ipx_disconnect, pru_listen_notsupp, ipx_peeraddr, pru_rcvd_notsupp,
94	pru_rcvoob_notsupp, ipx_send, pru_sense_null, ipx_shutdown,
95	ipx_sockaddr, sosend, soreceive, sopoll
96};
97
98struct	pr_usrreqs ripx_usrreqs = {
99	ipx_usr_abort, pru_accept_notsupp, ripx_attach, ipx_bind,
100	ipx_connect, pru_connect2_notsupp, ipx_control, ipx_detach,
101	ipx_disconnect, pru_listen_notsupp, ipx_peeraddr, pru_rcvd_notsupp,
102	pru_rcvoob_notsupp, ipx_send, pru_sense_null, ipx_shutdown,
103	ipx_sockaddr, sosend, soreceive, sopoll
104};
105
106/*
107 *  This may also be called for raw listeners.
108 */
109void
110ipx_input(m, ipxp)
111	struct mbuf *m;
112	register struct ipxpcb *ipxp;
113{
114	register struct ipx *ipx = mtod(m, struct ipx *);
115	struct ifnet *ifp = m->m_pkthdr.rcvif;
116	struct sockaddr_ipx ipx_ipx;
117
118	if (ipxp == NULL)
119		panic("No ipxpcb");
120	/*
121	 * Construct sockaddr format source address.
122	 * Stuff source address and datagram in user buffer.
123	 */
124	ipx_ipx.sipx_len = sizeof(ipx_ipx);
125	ipx_ipx.sipx_family = AF_IPX;
126	ipx_ipx.sipx_addr = ipx->ipx_sna;
127	ipx_ipx.sipx_zero[0] = '\0';
128	ipx_ipx.sipx_zero[1] = '\0';
129	if (ipx_neteqnn(ipx->ipx_sna.x_net, ipx_zeronet) && ifp != NULL) {
130		register struct ifaddr *ifa;
131
132		for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa != NULL;
133		     ifa = TAILQ_NEXT(ifa, ifa_link)) {
134			if (ifa->ifa_addr->sa_family == AF_IPX) {
135				ipx_ipx.sipx_addr.x_net =
136					IA_SIPX(ifa)->sipx_addr.x_net;
137				break;
138			}
139		}
140	}
141	ipxp->ipxp_rpt = ipx->ipx_pt;
142	if (!(ipxp->ipxp_flags & IPXP_RAWIN) ) {
143		m->m_len -= sizeof(struct ipx);
144		m->m_pkthdr.len -= sizeof(struct ipx);
145		m->m_data += sizeof(struct ipx);
146	}
147	if (sbappendaddr(&ipxp->ipxp_socket->so_rcv, (struct sockaddr *)&ipx_ipx,
148	    m, (struct mbuf *)NULL) == 0)
149		goto bad;
150	sorwakeup(ipxp->ipxp_socket);
151	return;
152bad:
153	m_freem(m);
154}
155
156void
157ipx_abort(ipxp)
158	struct ipxpcb *ipxp;
159{
160	struct socket *so = ipxp->ipxp_socket;
161
162	ipx_pcbdisconnect(ipxp);
163	soisdisconnected(so);
164}
165
166/*
167 * Drop connection, reporting
168 * the specified error.
169 */
170void
171ipx_drop(ipxp, errno)
172	register struct ipxpcb *ipxp;
173	int errno;
174{
175	struct socket *so = ipxp->ipxp_socket;
176
177	/*
178	 * someday, in the IPX world
179	 * we will generate error protocol packets
180	 * announcing that the socket has gone away.
181	 *
182	 * XXX Probably never. IPX does not have error packets.
183	 */
184	/*if (TCPS_HAVERCVDSYN(tp->t_state)) {
185		tp->t_state = TCPS_CLOSED;
186		tcp_output(tp);
187	}*/
188	so->so_error = errno;
189	ipx_pcbdisconnect(ipxp);
190	soisdisconnected(so);
191}
192
193static int
194ipx_output(ipxp, m0)
195	struct ipxpcb *ipxp;
196	struct mbuf *m0;
197{
198	register struct ipx *ipx;
199	register struct socket *so;
200	register int len = 0;
201	register struct route *ro;
202	struct mbuf *m;
203	struct mbuf *mprev = NULL;
204
205	/*
206	 * Calculate data length.
207	 */
208	for (m = m0; m != NULL; m = m->m_next) {
209		mprev = m;
210		len += m->m_len;
211	}
212	/*
213	 * Make sure packet is actually of even length.
214	 */
215
216	if (len & 1) {
217		m = mprev;
218		if ((m->m_flags & M_EXT) == 0 &&
219			(m->m_len + m->m_data < &m->m_dat[MLEN])) {
220			mtod(m, char*)[m->m_len++] = 0;
221		} else {
222			struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);
223
224			if (m1 == NULL) {
225				m_freem(m0);
226				return (ENOBUFS);
227			}
228			m1->m_len = 1;
229			* mtod(m1, char *) = 0;
230			m->m_next = m1;
231		}
232		m0->m_pkthdr.len++;
233	}
234
235	/*
236	 * Fill in mbuf with extended IPX header
237	 * and addresses and length put into network format.
238	 */
239	m = m0;
240	if (ipxp->ipxp_flags & IPXP_RAWOUT) {
241		ipx = mtod(m, struct ipx *);
242	} else {
243		M_PREPEND(m, sizeof(struct ipx), M_DONTWAIT);
244		if (m == NULL)
245			return (ENOBUFS);
246		ipx = mtod(m, struct ipx *);
247		ipx->ipx_tc = 0;
248		ipx->ipx_pt = ipxp->ipxp_dpt;
249		ipx->ipx_sna = ipxp->ipxp_laddr;
250		ipx->ipx_dna = ipxp->ipxp_faddr;
251		len += sizeof(struct ipx);
252	}
253
254	ipx->ipx_len = htons((u_short)len);
255
256	if (ipxp->ipxp_flags & IPXP_CHECKSUM) {
257		ipx->ipx_sum = ipx_cksum(m, len);
258	} else
259		ipx->ipx_sum = 0xffff;
260
261	/*
262	 * Output datagram.
263	 */
264	so = ipxp->ipxp_socket;
265	if (so->so_options & SO_DONTROUTE)
266		return (ipx_outputfl(m, (struct route *)NULL,
267		    (so->so_options & SO_BROADCAST) | IPX_ROUTETOIF));
268	/*
269	 * Use cached route for previous datagram if
270	 * possible.  If the previous net was the same
271	 * and the interface was a broadcast medium, or
272	 * if the previous destination was identical,
273	 * then we are ok.
274	 *
275	 * NB: We don't handle broadcasts because that
276	 *     would require 3 subroutine calls.
277	 */
278	ro = &ipxp->ipxp_route;
279#ifdef ancient_history
280	/*
281	 * I think that this will all be handled in ipx_pcbconnect!
282	 */
283	if (ro->ro_rt != NULL) {
284		if(ipx_neteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) {
285			/*
286			 * This assumes we have no GH type routes
287			 */
288			if (ro->ro_rt->rt_flags & RTF_HOST) {
289				if (!ipx_hosteq(ipxp->ipxp_lastdst, ipx->ipx_dna))
290					goto re_route;
291
292			}
293			if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
294				register struct ipx_addr *dst =
295						&satoipx_addr(ro->ro_dst);
296				dst->x_host = ipx->ipx_dna.x_host;
297			}
298			/*
299			 * Otherwise, we go through the same gateway
300			 * and dst is already set up.
301			 */
302		} else {
303		re_route:
304			RTFREE(ro->ro_rt);
305			ro->ro_rt = NULL;
306		}
307	}
308	ipxp->ipxp_lastdst = ipx->ipx_dna;
309#endif /* ancient_history */
310	return (ipx_outputfl(m, ro, so->so_options & SO_BROADCAST));
311}
312
313int
314ipx_ctloutput(so, sopt)
315	struct socket *so;
316	struct sockopt *sopt;
317{
318	struct ipxpcb *ipxp = sotoipxpcb(so);
319	int mask, error, optval;
320	short soptval;
321	struct ipx ioptval;
322
323	error = 0;
324	if (ipxp == NULL)
325		return (EINVAL);
326
327	switch (sopt->sopt_dir) {
328	case SOPT_GET:
329		switch (sopt->sopt_name) {
330		case SO_ALL_PACKETS:
331			mask = IPXP_ALL_PACKETS;
332			goto get_flags;
333
334		case SO_HEADERS_ON_INPUT:
335			mask = IPXP_RAWIN;
336			goto get_flags;
337
338		case SO_IPX_CHECKSUM:
339			mask = IPXP_CHECKSUM;
340			goto get_flags;
341
342		case SO_HEADERS_ON_OUTPUT:
343			mask = IPXP_RAWOUT;
344		get_flags:
345			soptval = ipxp->ipxp_flags & mask;
346			error = sooptcopyout(sopt, &soptval, sizeof soptval);
347			break;
348
349		case SO_DEFAULT_HEADERS:
350			ioptval.ipx_len = 0;
351			ioptval.ipx_sum = 0;
352			ioptval.ipx_tc = 0;
353			ioptval.ipx_pt = ipxp->ipxp_dpt;
354			ioptval.ipx_dna = ipxp->ipxp_faddr;
355			ioptval.ipx_sna = ipxp->ipxp_laddr;
356			error = sooptcopyout(sopt, &soptval, sizeof soptval);
357			break;
358
359		case SO_SEQNO:
360			error = sooptcopyout(sopt, &ipx_pexseq,
361					     sizeof ipx_pexseq);
362			ipx_pexseq++;
363			break;
364
365		default:
366			error = EINVAL;
367		}
368		break;
369
370	case SOPT_SET:
371		switch (sopt->sopt_name) {
372		case SO_ALL_PACKETS:
373			mask = IPXP_ALL_PACKETS;
374			goto set_head;
375
376		case SO_HEADERS_ON_INPUT:
377			mask = IPXP_RAWIN;
378			goto set_head;
379
380		case SO_IPX_CHECKSUM:
381			mask = IPXP_CHECKSUM;
382
383		case SO_HEADERS_ON_OUTPUT:
384			mask = IPXP_RAWOUT;
385		set_head:
386			error = sooptcopyin(sopt, &optval, sizeof optval,
387					    sizeof optval);
388			if (error)
389				break;
390			if (optval)
391				ipxp->ipxp_flags |= mask;
392			else
393				ipxp->ipxp_flags &= ~mask;
394			break;
395
396		case SO_DEFAULT_HEADERS:
397			error = sooptcopyin(sopt, &ioptval, sizeof ioptval,
398					    sizeof ioptval);
399			if (error)
400				break;
401			ipxp->ipxp_dpt = ioptval.ipx_pt;
402			break;
403#ifdef IPXIP
404		case SO_IPXIP_ROUTE:
405			error = ipxip_route(so, sopt);
406			break;
407#endif /* IPXIP */
408		default:
409			error = EINVAL;
410		}
411		break;
412	}
413	return (error);
414}
415
416static int
417ipx_usr_abort(so)
418	struct socket *so;
419{
420	int s;
421	struct ipxpcb *ipxp = sotoipxpcb(so);
422
423	s = splnet();
424	ipx_pcbdetach(ipxp);
425	splx(s);
426	sotryfree(so);
427	soisdisconnected(so);
428	return (0);
429}
430
431static int
432ipx_attach(so, proto, td)
433	struct socket *so;
434	int proto;
435	struct thread *td;
436{
437	int error;
438	int s;
439	struct ipxpcb *ipxp = sotoipxpcb(so);
440
441	if (ipxp != NULL)
442		return (EINVAL);
443	s = splnet();
444	error = ipx_pcballoc(so, &ipxpcb, td);
445	splx(s);
446	if (error == 0)
447		error = soreserve(so, ipxsendspace, ipxrecvspace);
448	return (error);
449}
450
451static int
452ipx_bind(so, nam, td)
453	struct socket *so;
454	struct sockaddr *nam;
455	struct thread *td;
456{
457	struct ipxpcb *ipxp = sotoipxpcb(so);
458
459	return (ipx_pcbbind(ipxp, nam, td));
460}
461
462static int
463ipx_connect(so, nam, td)
464	struct socket *so;
465	struct sockaddr *nam;
466	struct thread *td;
467{
468	int error;
469	int s;
470	struct ipxpcb *ipxp = sotoipxpcb(so);
471
472	if (!ipx_nullhost(ipxp->ipxp_faddr))
473		return (EISCONN);
474	s = splnet();
475	error = ipx_pcbconnect(ipxp, nam, td);
476	splx(s);
477	if (error == 0)
478		soisconnected(so);
479	return (error);
480}
481
482static int
483ipx_detach(so)
484	struct socket *so;
485{
486	int s;
487	struct ipxpcb *ipxp = sotoipxpcb(so);
488
489	if (ipxp == NULL)
490		return (ENOTCONN);
491	s = splnet();
492	ipx_pcbdetach(ipxp);
493	splx(s);
494	return (0);
495}
496
497static int
498ipx_disconnect(so)
499	struct socket *so;
500{
501	int s;
502	struct ipxpcb *ipxp = sotoipxpcb(so);
503
504	if (ipx_nullhost(ipxp->ipxp_faddr))
505		return (ENOTCONN);
506	s = splnet();
507	ipx_pcbdisconnect(ipxp);
508	splx(s);
509	soisdisconnected(so);
510	return (0);
511}
512
513int
514ipx_peeraddr(so, nam)
515	struct socket *so;
516	struct sockaddr **nam;
517{
518	struct ipxpcb *ipxp = sotoipxpcb(so);
519
520	ipx_setpeeraddr(ipxp, nam); /* XXX what if alloc fails? */
521	return (0);
522}
523
524static int
525ipx_send(so, flags, m, nam, control, td)
526	struct socket *so;
527	int flags;
528	struct mbuf *m;
529	struct sockaddr *nam;
530	struct mbuf *control;
531	struct thread *td;
532{
533	int error;
534	struct ipxpcb *ipxp = sotoipxpcb(so);
535	struct ipx_addr laddr;
536	int s = 0;
537
538	if (nam != NULL) {
539		laddr = ipxp->ipxp_laddr;
540		if (!ipx_nullhost(ipxp->ipxp_faddr)) {
541			error = EISCONN;
542			goto send_release;
543		}
544		/*
545		 * Must block input while temporarily connected.
546		 */
547		s = splnet();
548		error = ipx_pcbconnect(ipxp, nam, td);
549		if (error) {
550			splx(s);
551			goto send_release;
552		}
553	} else {
554		if (ipx_nullhost(ipxp->ipxp_faddr)) {
555			error = ENOTCONN;
556			goto send_release;
557		}
558	}
559	error = ipx_output(ipxp, m);
560	m = NULL;
561	if (nam != NULL) {
562		ipx_pcbdisconnect(ipxp);
563		splx(s);
564		ipxp->ipxp_laddr = laddr;
565	}
566
567send_release:
568	if (m != NULL)
569		m_freem(m);
570	return (error);
571}
572
573static int
574ipx_shutdown(so)
575	struct socket *so;
576{
577	socantsendmore(so);
578	return (0);
579}
580
581int
582ipx_sockaddr(so, nam)
583	struct socket *so;
584	struct sockaddr **nam;
585{
586	struct ipxpcb *ipxp = sotoipxpcb(so);
587
588	ipx_setsockaddr(ipxp, nam); /* XXX what if alloc fails? */
589	return (0);
590}
591
592static int
593ripx_attach(so, proto, td)
594	struct socket *so;
595	int proto;
596	struct thread *td;
597{
598	int error = 0;
599	int s;
600	struct ipxpcb *ipxp = sotoipxpcb(so);
601
602	if (td != NULL && (error = suser(td)) != 0)
603		return (error);
604	s = splnet();
605	error = ipx_pcballoc(so, &ipxrawpcb, td);
606	splx(s);
607	if (error)
608		return (error);
609	error = soreserve(so, ipxsendspace, ipxrecvspace);
610	if (error)
611		return (error);
612	ipxp = sotoipxpcb(so);
613	ipxp->ipxp_faddr.x_host = ipx_broadhost;
614	ipxp->ipxp_flags = IPXP_RAWIN | IPXP_RAWOUT;
615	return (error);
616}
617