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