kernel/ipx: Add a missing 'goto set_head;'.
[dragonfly.git] / sys / netproto / ipx / ipx_usrreq.c
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  * $FreeBSD: src/sys/netipx/ipx_usrreq.c,v 1.26.2.1 2001/02/22 09:44:18 bp Exp $
37  */
38
39 #include "opt_ipx.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/mbuf.h>
45 #include <sys/proc.h>
46 #include <sys/priv.h>
47 #include <sys/protosw.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50 #include <sys/socketvar2.h>
51 #include <sys/sysctl.h>
52
53 #include <sys/thread2.h>
54 #include <sys/msgport2.h>
55
56 #include <net/if.h>
57 #include <net/route.h>
58
59 #include <netinet/in.h>
60
61 #include "ipx.h"
62 #include "ipx_pcb.h"
63 #include "ipx_if.h"
64 #include "ipx_var.h"
65 #include "ipx_ip.h"
66
67 /*
68  * IPX protocol implementation.
69  */
70
71 static int ipxsendspace = IPXSNDQ;
72 SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxsendspace, CTLFLAG_RW,
73             &ipxsendspace, 0, "");
74 static int ipxrecvspace = IPXRCVQ;
75 SYSCTL_INT(_net_ipx_ipx, OID_AUTO, ipxrecvspace, CTLFLAG_RW,
76             &ipxrecvspace, 0, "");
77
78 static void ipx_usr_abort(netmsg_t msg);
79 static void ipx_attach(netmsg_t msg);
80 static void ipx_bind(netmsg_t msg);
81 static void ipx_connect(netmsg_t msg);
82 /*static void ipx_control(netmsg_t msg);*/
83 static void ipx_detach(netmsg_t msg);
84 static void ipx_disconnect(netmsg_t msg);
85 /*static void ipx_peeraddr(netmsg_t msg);*/
86 static void ipx_send(netmsg_t msg);
87 static void ipx_shutdown(netmsg_t msg);
88 /*static void ipx_sockaddr(netmsg_t msg);*/
89 static void ripx_attach(netmsg_t msg);
90
91 struct  pr_usrreqs ipx_usrreqs = {
92         .pru_abort = ipx_usr_abort,
93         .pru_accept = pr_generic_notsupp,
94         .pru_attach = ipx_attach,
95         .pru_bind = ipx_bind,
96         .pru_connect = ipx_connect,
97         .pru_connect2 = pr_generic_notsupp,
98         .pru_control = ipx_control,
99         .pru_detach = ipx_detach,
100         .pru_disconnect = ipx_disconnect,
101         .pru_listen = pr_generic_notsupp,
102         .pru_peeraddr = ipx_peeraddr,
103         .pru_rcvd = pr_generic_notsupp,
104         .pru_rcvoob = pr_generic_notsupp,
105         .pru_send = ipx_send,
106         .pru_sense = pru_sense_null,
107         .pru_shutdown = ipx_shutdown,
108         .pru_sockaddr = ipx_sockaddr,
109         .pru_sosend = sosend,
110         .pru_soreceive = soreceive
111 };
112
113 struct  pr_usrreqs ripx_usrreqs = {
114         .pru_abort = ipx_usr_abort,
115         .pru_accept = pr_generic_notsupp,
116         .pru_attach = ripx_attach,
117         .pru_bind = ipx_bind,
118         .pru_connect = ipx_connect,
119         .pru_connect2 = pr_generic_notsupp,
120         .pru_control = ipx_control,
121         .pru_detach = ipx_detach,
122         .pru_disconnect = ipx_disconnect,
123         .pru_listen = pr_generic_notsupp,
124         .pru_peeraddr = ipx_peeraddr,
125         .pru_rcvd = pr_generic_notsupp,
126         .pru_rcvoob = pr_generic_notsupp,
127         .pru_send = ipx_send,
128         .pru_sense = pru_sense_null,
129         .pru_shutdown = ipx_shutdown,
130         .pru_sockaddr = ipx_sockaddr,
131         .pru_sosend = sosend,
132         .pru_soreceive = soreceive
133 };
134
135 /*
136  *  This may also be called for raw listeners.
137  */
138 void
139 ipx_input(struct mbuf *m, struct ipxpcb *ipxp)
140 {
141         struct ipx *ipx = mtod(m, struct ipx *);
142         struct ifnet *ifp = m->m_pkthdr.rcvif;
143         struct sockaddr_ipx ipx_ipx;
144
145         if (ipxp == NULL)
146                 panic("No ipxpcb");
147         /*
148          * Construct sockaddr format source address.
149          * Stuff source address and datagram in user buffer.
150          */
151         ipx_ipx.sipx_len = sizeof(ipx_ipx);
152         ipx_ipx.sipx_family = AF_IPX;
153         ipx_ipx.sipx_addr = ipx->ipx_sna;
154         ipx_ipx.sipx_zero[0] = '\0';
155         ipx_ipx.sipx_zero[1] = '\0';
156         if (ipx_neteqnn(ipx->ipx_sna.x_net, ipx_zeronet) && ifp != NULL) {
157                 struct ifaddr_container *ifac;
158
159                 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
160                         struct ifaddr *ifa = ifac->ifa;
161
162                         if (ifa->ifa_addr->sa_family == AF_IPX) {
163                                 ipx_ipx.sipx_addr.x_net =
164                                         IA_SIPX(ifa)->sipx_addr.x_net;
165                                 break;
166                         }
167                 }
168         }
169         ipxp->ipxp_rpt = ipx->ipx_pt;
170         if (!(ipxp->ipxp_flags & IPXP_RAWIN) ) {
171                 m->m_len -= sizeof(struct ipx);
172                 m->m_pkthdr.len -= sizeof(struct ipx);
173                 m->m_data += sizeof(struct ipx);
174         }
175         if (ssb_appendaddr(&ipxp->ipxp_socket->so_rcv, (struct sockaddr *)&ipx_ipx,
176             m, NULL) == 0)
177                 goto bad;
178         sorwakeup(ipxp->ipxp_socket);
179         return;
180 bad:
181         m_freem(m);
182 }
183
184 void
185 ipx_abort(struct ipxpcb *ipxp)
186 {
187         struct socket *so = ipxp->ipxp_socket;
188
189         soreference(so);
190         ipx_pcbdisconnect(ipxp);
191         soisdisconnected(so);
192         sofree(so);
193 }
194
195 /*
196  * Drop connection, reporting
197  * the specified error.
198  */
199 void
200 ipx_drop(struct ipxpcb *ipxp, int errno)
201 {
202         struct socket *so = ipxp->ipxp_socket;
203
204         /*
205          * someday, in the IPX world
206          * we will generate error protocol packets
207          * announcing that the socket has gone away.
208          *
209          * XXX Probably never. IPX does not have error packets.
210          */
211         /*if (TCPS_HAVERCVDSYN(tp->t_state)) {
212                 tp->t_state = TCPS_CLOSED;
213                 tcp_output(tp);
214         }*/
215         so->so_error = errno;
216         soreference(so);
217         ipx_pcbdisconnect(ipxp);
218         soisdisconnected(so);
219         sofree(so);
220 }
221
222 static int
223 ipx_output(struct ipxpcb *ipxp, struct mbuf *m0)
224 {
225         struct ipx *ipx;
226         struct socket *so;
227         int len = 0;
228         struct route *ro;
229         struct mbuf *m;
230         struct mbuf *mprev = NULL;
231
232         /*
233          * Calculate data length.
234          */
235         for (m = m0; m != NULL; m = m->m_next) {
236                 mprev = m;
237                 len += m->m_len;
238         }
239         /*
240          * Make sure packet is actually of even length.
241          */
242         
243         if (len & 1) {
244                 m = mprev;
245                 if ((m->m_flags & M_EXT) == 0 &&
246                         (m->m_len + m->m_data < &m->m_dat[MLEN])) {
247                         mtod(m, char*)[m->m_len++] = 0;
248                 } else {
249                         struct mbuf *m1 = m_get(MB_DONTWAIT, MT_DATA);
250
251                         if (m1 == NULL) {
252                                 m_freem(m0);
253                                 return (ENOBUFS);
254                         }
255                         m1->m_len = 1;
256                         * mtod(m1, char *) = 0;
257                         m->m_next = m1;
258                 }
259                 m0->m_pkthdr.len++;
260         }
261
262         /*
263          * Fill in mbuf with extended IPX header
264          * and addresses and length put into network format.
265          */
266         m = m0;
267         if (ipxp->ipxp_flags & IPXP_RAWOUT) {
268                 ipx = mtod(m, struct ipx *);
269         } else {
270                 M_PREPEND(m, sizeof(struct ipx), MB_DONTWAIT);
271                 if (m == NULL)
272                         return (ENOBUFS);
273                 ipx = mtod(m, struct ipx *);
274                 ipx->ipx_tc = 0;
275                 ipx->ipx_pt = ipxp->ipxp_dpt;
276                 ipx->ipx_sna = ipxp->ipxp_laddr;
277                 ipx->ipx_dna = ipxp->ipxp_faddr;
278                 len += sizeof(struct ipx);
279         }
280
281         ipx->ipx_len = htons((u_short)len);
282
283         if (ipxp->ipxp_flags & IPXP_CHECKSUM) {
284                 ipx->ipx_sum = ipx_cksum(m, len);
285         } else
286                 ipx->ipx_sum = 0xffff;
287
288         /*
289          * Output datagram.
290          */
291         so = ipxp->ipxp_socket;
292         if (so->so_options & SO_DONTROUTE)
293                 return (ipx_outputfl(m, NULL,
294                     (so->so_options & SO_BROADCAST) | IPX_ROUTETOIF));
295         /*
296          * Use cached route for previous datagram if
297          * possible.  If the previous net was the same
298          * and the interface was a broadcast medium, or
299          * if the previous destination was identical,
300          * then we are ok.
301          *
302          * NB: We don't handle broadcasts because that
303          *     would require 3 subroutine calls.
304          */
305         ro = &ipxp->ipxp_route;
306 #ifdef ancient_history
307         /*
308          * I think that this will all be handled in ipx_pcbconnect!
309          */
310         if (ro->ro_rt != NULL) {
311                 if(ipx_neteq(ipxp->ipxp_lastdst, ipx->ipx_dna)) {
312                         /*
313                          * This assumes we have no GH type routes
314                          */
315                         if (ro->ro_rt->rt_flags & RTF_HOST) {
316                                 if (!ipx_hosteq(ipxp->ipxp_lastdst, ipx->ipx_dna))
317                                         goto re_route;
318
319                         }
320                         if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
321                                 struct ipx_addr *dst =
322                                                 &satoipx_addr(ro->ro_dst);
323                                 dst->x_host = ipx->ipx_dna.x_host;
324                         }
325                         /* 
326                          * Otherwise, we go through the same gateway
327                          * and dst is already set up.
328                          */
329                 } else {
330                 re_route:
331                         RTFREE(ro->ro_rt);
332                         ro->ro_rt = NULL;
333                 }
334         }
335         ipxp->ipxp_lastdst = ipx->ipx_dna;
336 #endif /* ancient_history */
337         return (ipx_outputfl(m, ro, so->so_options & SO_BROADCAST));
338 }
339
340 void
341 ipx_ctloutput(netmsg_t msg)
342 {
343         struct socket *so = msg->base.nm_so;
344         struct sockopt *sopt = msg->ctloutput.nm_sopt;
345         struct ipxpcb *ipxp = sotoipxpcb(so);
346         int mask, error, optval;
347         short soptval;
348         struct ipx ioptval;
349
350         error = 0;
351         if (ipxp == NULL) {
352                 error = EINVAL;
353                 goto out;
354         }
355
356         switch (sopt->sopt_dir) {
357         case SOPT_GET:
358                 switch (sopt->sopt_name) {
359                 case SO_ALL_PACKETS:
360                         mask = IPXP_ALL_PACKETS;
361                         goto get_flags;
362
363                 case SO_HEADERS_ON_INPUT:
364                         mask = IPXP_RAWIN;
365                         goto get_flags;
366
367                 case SO_IPX_CHECKSUM:
368                         mask = IPXP_CHECKSUM;
369                         goto get_flags;
370                         
371                 case SO_HEADERS_ON_OUTPUT:
372                         mask = IPXP_RAWOUT;
373                 get_flags:
374                         soptval = ipxp->ipxp_flags & mask;
375                         error = sooptcopyout(sopt, &soptval, sizeof soptval);
376                         break;
377
378                 case SO_DEFAULT_HEADERS:
379                         ioptval.ipx_len = 0;
380                         ioptval.ipx_sum = 0;
381                         ioptval.ipx_tc = 0;
382                         ioptval.ipx_pt = ipxp->ipxp_dpt;
383                         ioptval.ipx_dna = ipxp->ipxp_faddr;
384                         ioptval.ipx_sna = ipxp->ipxp_laddr;
385                         error = sooptcopyout(sopt, &soptval, sizeof soptval);
386                         break;
387
388                 case SO_SEQNO:
389                         error = sooptcopyout(sopt, &ipx_pexseq, 
390                                              sizeof ipx_pexseq);
391                         ipx_pexseq++;
392                         break;
393
394                 default:
395                         error = EINVAL;
396                 }
397                 break;
398
399         case SOPT_SET:
400                 switch (sopt->sopt_name) {
401                 case SO_ALL_PACKETS:
402                         mask = IPXP_ALL_PACKETS;
403                         goto set_head;
404
405                 case SO_HEADERS_ON_INPUT:
406                         mask = IPXP_RAWIN;
407                         goto set_head;
408
409                 case SO_IPX_CHECKSUM:
410                         mask = IPXP_CHECKSUM;
411                         goto set_head;
412
413                 case SO_HEADERS_ON_OUTPUT:
414                         mask = IPXP_RAWOUT;
415                 set_head:
416                         error = sooptcopyin(sopt, &optval, sizeof optval,
417                                             sizeof optval);
418                         if (error)
419                                 break;
420                         if (optval)
421                                 ipxp->ipxp_flags |= mask;
422                         else
423                                 ipxp->ipxp_flags &= ~mask;
424                         break;
425
426                 case SO_DEFAULT_HEADERS:
427                         error = sooptcopyin(sopt, &ioptval, sizeof ioptval,
428                                             sizeof ioptval);
429                         if (error)
430                                 break;
431                         ipxp->ipxp_dpt = ioptval.ipx_pt;
432                         break;
433 #ifdef IPXIP
434                 case SO_IPXIP_ROUTE:
435                         error = ipxip_route(so, sopt);
436                         break;
437 #endif /* IPXIP */
438 #ifdef IPTUNNEL
439 #if 0
440                 case SO_IPXTUNNEL_ROUTE:
441                         error = ipxtun_route(so, sopt);
442                         break;
443 #endif
444 #endif
445                 default:
446                         error = EINVAL;
447                 }
448                 break;
449         }
450 out:
451         lwkt_replymsg(&msg->lmsg, error);
452 }
453
454 /*
455  * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort()
456  *       will sofree() it when we return.
457  */
458 static void
459 ipx_usr_abort(netmsg_t msg)
460 {
461         struct socket *so = msg->base.nm_so;
462         struct ipxpcb *ipxp = sotoipxpcb(so);
463
464         ipx_pcbdetach(ipxp);
465         soisdisconnected(so);
466
467         lwkt_replymsg(&msg->lmsg, 0);
468 }
469
470 static void
471 ipx_attach(netmsg_t msg)
472 {
473         struct socket *so = msg->base.nm_so;
474         struct pru_attach_info *ai = msg->attach.nm_ai;
475         struct ipxpcb *ipxp = sotoipxpcb(so);
476         int error;
477
478         if (ipxp != NULL) {
479                 error = EINVAL;
480         } else {
481                 error = ipx_pcballoc(so, &ipxpcb_list);
482                 if (error == 0) {
483                         error = soreserve(so, ipxsendspace, ipxrecvspace,
484                                           ai->sb_rlimit);
485                 }
486         }
487         lwkt_replymsg(&msg->lmsg, error);
488 }
489
490 static void
491 ipx_bind(netmsg_t msg)
492 {
493         struct socket *so = msg->base.nm_so;
494         struct ipxpcb *ipxp = sotoipxpcb(so);
495         int error;
496
497         error = ipx_pcbbind(ipxp, msg->bind.nm_nam, msg->bind.nm_td);
498         lwkt_replymsg(&msg->lmsg, error);
499 }
500
501 static void
502 ipx_connect(netmsg_t msg)
503 {
504         struct socket *so = msg->base.nm_so;
505         struct ipxpcb *ipxp = sotoipxpcb(so);
506         int error;
507
508         if (ipx_nullhost(ipxp->ipxp_faddr)) {
509                 error = ipx_pcbconnect(ipxp,
510                                        msg->connect.nm_nam,
511                                        msg->connect.nm_td);
512                 if (error == 0)
513                         soisconnected(so);
514         } else {
515                 error = EISCONN;
516         }
517         lwkt_replymsg(&msg->lmsg, error);
518 }
519
520 void
521 ipx_control(netmsg_t msg)
522 {
523         int error;
524
525         error = ipx_control_oncpu(msg->base.nm_so,
526                                   msg->control.nm_cmd,
527                                   msg->control.nm_data,
528                                   msg->control.nm_ifp,
529                                   msg->control.nm_td);
530         lwkt_replymsg(&msg->lmsg, error);
531 }
532
533 static void
534 ipx_detach(netmsg_t msg)
535 {
536         struct socket *so = msg->base.nm_so;
537         struct ipxpcb *ipxp = sotoipxpcb(so);
538         int error;
539
540         if (ipxp) {
541                 ipx_pcbdetach(ipxp);
542                 error = 0;
543         } else {
544                 error = ENOTCONN;
545         }
546         lwkt_replymsg(&msg->lmsg, error);
547 }
548
549 static void
550 ipx_disconnect(netmsg_t msg)
551 {
552         struct socket *so = msg->base.nm_so;
553         struct ipxpcb *ipxp = sotoipxpcb(so);
554         int error;
555
556         if (ipx_nullhost(ipxp->ipxp_faddr)) {
557                 error= ENOTCONN;
558         } else {
559                 soreference(so);
560                 ipx_pcbdisconnect(ipxp);
561                 soisdisconnected(so);
562                 sofree(so);
563                 error = 0;
564         }
565         lwkt_replymsg(&msg->lmsg, error);
566 }
567
568 void
569 ipx_peeraddr(netmsg_t msg)
570 {
571         struct socket *so = msg->base.nm_so;
572         struct ipxpcb *ipxp = sotoipxpcb(so);
573
574         ipx_setpeeraddr(ipxp, msg->peeraddr.nm_nam);
575         lwkt_replymsg(&msg->lmsg, 0);
576 }
577
578 static void
579 ipx_send(netmsg_t msg)
580 {
581         struct socket *so = msg->base.nm_so;
582         struct mbuf *m = msg->send.nm_m;
583         struct sockaddr *nam = msg->send.nm_addr;
584         struct mbuf *control = msg->send.nm_control;
585         struct thread *td = msg->send.nm_td;
586         struct ipxpcb *ipxp = sotoipxpcb(so);
587         struct ipx_addr laddr;
588         int error;
589
590         if (control) {
591                 m_freem(control);
592                 control = NULL;
593         }
594
595         if (nam != NULL) {
596                 laddr = ipxp->ipxp_laddr;
597                 if (!ipx_nullhost(ipxp->ipxp_faddr)) {
598                         error = EISCONN;
599                         goto send_release;
600                 }
601                 /*
602                  * Must block input while temporarily connected.
603                  */
604                 error = ipx_pcbconnect(ipxp, nam, td);
605                 if (error) {
606                         goto send_release;
607                 }
608         } else {
609                 if (ipx_nullhost(ipxp->ipxp_faddr)) {
610                         error = ENOTCONN;
611                         goto send_release;
612                 }
613         }
614         error = ipx_output(ipxp, m);
615         m = NULL;
616         if (nam != NULL) {
617                 ipx_pcbdisconnect(ipxp);
618                 ipxp->ipxp_laddr = laddr;
619         }
620 send_release:
621         if (m != NULL)
622                 m_freem(m);
623         lwkt_replymsg(&msg->lmsg, error);
624 }
625
626 static void
627 ipx_shutdown(netmsg_t msg)
628 {
629         struct socket *so = msg->base.nm_so;
630
631         socantsendmore(so);
632
633         lwkt_replymsg(&msg->lmsg, 0);
634 }
635
636 void
637 ipx_sockaddr(netmsg_t msg)
638 {
639         struct socket *so = msg->base.nm_so;
640         struct ipxpcb *ipxp = sotoipxpcb(so);
641
642         /* XXX what if alloc fails? */
643         ipx_setsockaddr(ipxp, msg->sockaddr.nm_nam);
644         lwkt_replymsg(&msg->lmsg, 0);
645 }
646
647 static void
648 ripx_attach(netmsg_t msg)
649 {
650         struct socket *so = msg->base.nm_so;
651         struct pru_attach_info *ai = msg->attach.nm_ai;
652         struct ipxpcb *ipxp;
653         int error;
654
655         error = priv_check_cred(ai->p_ucred, PRIV_ROOT, NULL_CRED_OKAY);
656         if (error)
657                 goto out;
658         error = ipx_pcballoc(so, &ipxrawpcb_list);
659         if (error)
660                 goto out;
661         error = soreserve(so, ipxsendspace, ipxrecvspace, ai->sb_rlimit);
662         if (error)
663                 goto out;
664         ipxp = sotoipxpcb(so);
665         ipxp->ipxp_faddr.x_host = ipx_broadhost;
666         ipxp->ipxp_flags = IPXP_RAWIN | IPXP_RAWOUT;
667 out:
668         lwkt_replymsg(&msg->lmsg, error);
669 }