File: /usr/src/linux/net/ipx/af_ipx.c
1 /*
2 * Implements an IPX socket layer.
3 *
4 * This code is derived from work by
5 * Ross Biro : Writing the original IP stack
6 * Fred Van Kempen : Tidying up the TCP/IP
7 *
8 * Many thanks go to Keith Baker, Institute For Industrial Information
9 * Technology Ltd, Swansea University for allowing me to work on this
10 * in my own time even though it was in some ways related to commercial
11 * work I am currently employed to do there.
12 *
13 * All the material in this file is subject to the Gnu license version 2.
14 * Neither Alan Cox nor the Swansea University Computer Society admit
15 * liability nor provide warranty for any of this software. This material
16 * is provided as is and at no charge.
17 *
18 * Revision 0.21: Uses the new generic socket option code.
19 * Revision 0.22: Gcc clean ups and drop out device registration. Use the
20 * new multi-protocol edition of hard_header
21 * Revision 0.23: IPX /proc by Mark Evans. Adding a route will
22 * will overwrite any existing route to the same network.
23 * Revision 0.24: Supports new /proc with no 4K limit
24 * Revision 0.25: Add ephemeral sockets, passive local network
25 * identification, support for local net 0 and
26 * multiple datalinks <Greg Page>
27 * Revision 0.26: Device drop kills IPX routes via it. (needed for module)
28 * Revision 0.27: Autobind <Mark Evans>
29 * Revision 0.28: Small fix for multiple local networks <Thomas Winder>
30 * Revision 0.29: Assorted major errors removed <Mark Evans>
31 * Small correction to promisc mode error fix <Alan Cox>
32 * Asynchronous I/O support. Changed to use notifiers
33 * and the newer packet_type stuff. Assorted major
34 * fixes <Alejandro Liu>
35 * Revision 0.30: Moved to net/ipx/... <Alan Cox>
36 * Don't set address length on recvfrom that errors.
37 * Incorrect verify_area.
38 * Revision 0.31: New sk_buffs. This still needs a lot of
39 * testing. <Alan Cox>
40 * Revision 0.32: Using sock_alloc_send_skb, firewall hooks. <Alan Cox>
41 * Supports sendmsg/recvmsg
42 * Revision 0.33: Internal network support, routing changes, uses a
43 * protocol private area for ipx data.
44 * Revision 0.34: Module support. <Jim Freeman>
45 * Revision 0.35: Checksum support. <Neil Turton>, hooked in by <Alan Cox>
46 * Handles WIN95 discovery packets <Volker Lendecke>
47 * Revision 0.36: Internal bump up for 2.1
48 * Revision 0.37: Began adding POSIXisms.
49 * Revision 0.38: Asynchronous socket stuff made current.
50 * Revision 0.39: SPX interfaces
51 * Revision 0.40: Tiny SIOCGSTAMP fix (chris@cybernet.co.nz)
52 * Revision 0.41: 802.2TR removed (p.norton@computer.org)
53 * Fixed connecting to primary net,
54 * Automatic binding on send & receive,
55 * Martijn van Oosterhout <kleptogimp@geocities.com>
56 * Revision 042: Multithreading - use spinlocks and refcounting to
57 * protect some structures: ipx_interface sock list, list
58 * of ipx interfaces, etc.
59 * Bugfixes - do refcounting on net_devices, check function
60 * results, etc. Thanks to davem and freitag for
61 * suggestions and guidance.
62 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>,
63 * November, 2000
64 * Revision 043: Shared SKBs, don't mangle packets, some cleanups
65 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>,
66 * December, 2000
67 * Revision 044: Call ipxitf_hold on NETDEV_UP (acme)
68 * Revision 045: fix PPROP routing bug (acme)
69 * Revision 046: Further fixes to PPROP, ipxitf_create_internal was
70 * doing an unneeded MOD_INC_USE_COUNT, implement
71 * sysctl for ipx_pprop_broacasting, fix the ipx sysctl
72 * handling, making it dynamic, some cleanups, thanks to
73 * Petr Vandrovec for review and good suggestions. (acme)
74 * Revision 047: Cleanups, CodingStyle changes, move the ncp connection
75 * hack out of line (acme)
76 *
77 * Protect the module by a MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT
78 * pair. Also, now usage count is managed this way
79 * -Count one if the auto_interface mode is on
80 * -Count one per configured interface
81 *
82 * Jacques Gelinas (jacques@solucorp.qc.ca)
83 *
84 *
85 * Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com>
86 * Neither Greg Page nor Caldera, Inc. admit liability nor provide
87 * warranty for any of this software. This material is provided
88 * "AS-IS" and at no charge.
89 */
90
91 #include <linux/config.h>
92 #include <linux/module.h>
93 #include <linux/errno.h>
94 #include <linux/types.h>
95 #include <linux/socket.h>
96 #include <linux/in.h>
97 #include <linux/kernel.h>
98 #include <linux/sched.h>
99 #include <linux/timer.h>
100 #include <linux/string.h>
101 #include <linux/sockios.h>
102 #include <linux/net.h>
103 #include <linux/netdevice.h>
104 #include <net/ipx.h>
105 #include <linux/inet.h>
106 #include <linux/route.h>
107 #include <net/sock.h>
108 #include <asm/uaccess.h>
109 #include <asm/system.h>
110 #include <linux/fcntl.h>
111 #include <linux/mm.h>
112 #include <linux/termios.h> /* For TIOCOUTQ/INQ */
113 #include <linux/interrupt.h>
114 #include <net/p8022.h>
115 #include <net/psnap.h>
116 #include <linux/proc_fs.h>
117 #include <linux/stat.h>
118 #include <linux/init.h>
119 #include <linux/if_arp.h>
120
121 #ifdef CONFIG_SYSCTL
122 extern void ipx_register_sysctl(void);
123 extern void ipx_unregister_sysctl(void);
124 #else
125 #define ipx_register_sysctl()
126 #define ipx_unregister_sysctl()
127 #endif
128
129 /* Configuration Variables */
130 static unsigned char ipxcfg_max_hops = 16;
131 static char ipxcfg_auto_select_primary;
132 static char ipxcfg_auto_create_interfaces;
133 int sysctl_ipx_pprop_broadcasting = 1;
134
135 /* Global Variables */
136 static struct datalink_proto *p8022_datalink;
137 static struct datalink_proto *pEII_datalink;
138 static struct datalink_proto *p8023_datalink;
139 static struct datalink_proto *pSNAP_datalink;
140
141 static struct proto_ops ipx_dgram_ops;
142
143 static struct net_proto_family *spx_family_ops;
144
145 static ipx_route *ipx_routes;
146 static rwlock_t ipx_routes_lock = RW_LOCK_UNLOCKED;
147
148 static ipx_interface *ipx_interfaces;
149 static spinlock_t ipx_interfaces_lock = SPIN_LOCK_UNLOCKED;
150
151 static ipx_interface *ipx_primary_net;
152 static ipx_interface *ipx_internal_net;
153
154 #define IPX_SKB_CB(__skb) ((struct ipx_cb *)&((__skb)->cb[0]))
155
156 #undef IPX_REFCNT_DEBUG
157 #ifdef IPX_REFCNT_DEBUG
158 atomic_t ipx_sock_nr;
159 #endif
160
161 static void ipxcfg_set_auto_create(char val)
162 {
163 if (ipxcfg_auto_create_interfaces != val) {
164 if (val)
165 MOD_INC_USE_COUNT;
166 else
167 MOD_DEC_USE_COUNT;
168
169 ipxcfg_auto_create_interfaces = val;
170 }
171 }
172
173 static void ipxcfg_set_auto_select(char val)
174 {
175 ipxcfg_auto_select_primary = val;
176 if (val && !ipx_primary_net)
177 ipx_primary_net = ipx_interfaces;
178 }
179
180 static int ipxcfg_get_config_data(ipx_config_data *arg)
181 {
182 ipx_config_data vals;
183
184 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
185 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
186
187 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
188 }
189
190 /* Handlers for the socket list. */
191
192 static inline void ipxitf_hold(ipx_interface *intrfc)
193 {
194 atomic_inc(&intrfc->refcnt);
195 }
196
197 static void ipxitf_down(ipx_interface *intrfc);
198
199 static inline void ipxitf_put(ipx_interface *intrfc)
200 {
201 if (atomic_dec_and_test(&intrfc->refcnt))
202 ipxitf_down(intrfc);
203 }
204
205 static void __ipxitf_down(ipx_interface *intrfc);
206
207 static inline void __ipxitf_put(ipx_interface *intrfc)
208 {
209 if (atomic_dec_and_test(&intrfc->refcnt))
210 __ipxitf_down(intrfc);
211 }
212 /*
213 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
214 * handler using this technique. They can be added although we do not
215 * use this facility.
216 */
217
218 void ipx_remove_socket(struct sock *sk)
219 {
220 struct sock *s;
221 ipx_interface *intrfc;
222
223 /* Determine interface with which socket is associated */
224 intrfc = sk->protinfo.af_ipx.intrfc;
225 if (!intrfc)
226 goto out;
227
228 ipxitf_hold(intrfc);
229 spin_lock_bh(&intrfc->if_sklist_lock);
230 s = intrfc->if_sklist;
231 if (s == sk) {
232 intrfc->if_sklist = s->next;
233 goto out_unlock;
234 }
235
236 while (s && s->next) {
237 if (s->next == sk) {
238 s->next = sk->next;
239 goto out_unlock;
240 }
241 s = s->next;
242 }
243 out_unlock:
244 spin_unlock_bh(&intrfc->if_sklist_lock);
245 sock_put(sk);
246 ipxitf_put(intrfc);
247 out: return;
248 }
249
250 static void ipx_destroy_socket(struct sock *sk)
251 {
252 ipx_remove_socket(sk);
253 skb_queue_purge(&sk->receive_queue);
254 #ifdef IPX_REFCNT_DEBUG
255 atomic_dec(&ipx_sock_nr);
256 printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk,
257 atomic_read(&ipx_sock_nr));
258 if (atomic_read(&sk->refcnt) != 1)
259 printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n",
260 sk, atomic_read(&sk->refcnt));
261 #endif
262 sock_put(sk);
263 }
264
265 /*
266 * The following code is used to support IPX Interfaces (IPXITF). An
267 * IPX interface is defined by a physical device and a frame type.
268 */
269 static ipx_route * ipxrtr_lookup(__u32);
270
271 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
272
273 static void ipxitf_clear_primary_net(void)
274 {
275 ipx_primary_net = ipxcfg_auto_select_primary ? ipx_interfaces : NULL;
276 }
277
278 static ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
279 unsigned short datalink)
280 {
281 ipx_interface *i = ipx_interfaces;
282
283 while (i && (i->if_dev != dev || i->if_dlink_type != datalink))
284 i = i->if_next;
285
286 return i;
287 }
288
289 static ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
290 unsigned short datalink)
291 {
292 ipx_interface *i;
293
294 spin_lock_bh(&ipx_interfaces_lock);
295 i = __ipxitf_find_using_phys(dev, datalink);
296 if (i)
297 ipxitf_hold(i);
298 spin_unlock_bh(&ipx_interfaces_lock);
299 return i;
300 }
301
302 static ipx_interface *ipxitf_find_using_net(__u32 net)
303 {
304 ipx_interface *i;
305
306 spin_lock_bh(&ipx_interfaces_lock);
307 if (net)
308 for (i = ipx_interfaces; i && i->if_netnum != net;
309 i = i->if_next)
310 ;
311 else
312 i = ipx_primary_net;
313 if (i)
314 ipxitf_hold(i);
315 spin_unlock_bh(&ipx_interfaces_lock);
316
317 return i;
318 }
319
320 /* Sockets are bound to a particular IPX interface. */
321 static void ipxitf_insert_socket(ipx_interface *intrfc, struct sock *sk)
322 {
323 ipxitf_hold(intrfc);
324 sock_hold(sk);
325 spin_lock_bh(&intrfc->if_sklist_lock);
326 sk->protinfo.af_ipx.intrfc = intrfc;
327 sk->next = NULL;
328 if (!intrfc->if_sklist)
329 intrfc->if_sklist = sk;
330 else {
331 struct sock *s = intrfc->if_sklist;
332 while (s->next)
333 s = s->next;
334 s->next = sk;
335 }
336 spin_unlock_bh(&intrfc->if_sklist_lock);
337 ipxitf_put(intrfc);
338 }
339
340 /* caller must hold intrfc->if_sklist_lock */
341 static struct sock *__ipxitf_find_socket(ipx_interface *intrfc,
342 unsigned short port)
343 {
344 struct sock *s = intrfc->if_sklist;
345
346 while (s && s->protinfo.af_ipx.port != port)
347 s = s->next;
348
349 return s;
350 }
351
352 /* caller must hold a reference to intrfc */
353 static struct sock *ipxitf_find_socket(ipx_interface *intrfc,
354 unsigned short port)
355 {
356 struct sock *s;
357
358 spin_lock_bh(&intrfc->if_sklist_lock);
359 s = __ipxitf_find_socket(intrfc, port);
360 if (s)
361 sock_hold(s);
362 spin_unlock_bh(&intrfc->if_sklist_lock);
363
364 return s;
365 }
366
367 #ifdef CONFIG_IPX_INTERN
368 static struct sock *ipxitf_find_internal_socket(ipx_interface *intrfc,
369 unsigned char *node, unsigned short port)
370 {
371 struct sock *s;
372
373 ipxitf_hold(intrfc);
374 spin_lock_bh(&intrfc->if_sklist_lock);
375 s = intrfc->if_sklist;
376
377 while (s) {
378 if (s->protinfo.af_ipx.port == port &&
379 !memcmp(node, s->protinfo.af_ipx.node, IPX_NODE_LEN))
380 break;
381 s = s->next;
382 }
383 spin_unlock_bh(&intrfc->if_sklist_lock);
384 ipxitf_put(intrfc);
385
386 return s;
387 }
388 #endif
389
390 static void ipxrtr_del_routes(ipx_interface *);
391
392 static void __ipxitf_down(ipx_interface *intrfc)
393 {
394 struct sock *s, *t;
395
396 /* Delete all routes associated with this interface */
397 ipxrtr_del_routes(intrfc);
398
399 spin_lock_bh(&intrfc->if_sklist_lock);
400 /* error sockets */
401 for (s = intrfc->if_sklist; s;) {
402 s->err = ENOLINK;
403 s->error_report(s);
404 s->protinfo.af_ipx.intrfc = NULL;
405 s->protinfo.af_ipx.port = 0;
406 s->zapped = 1; /* Indicates it is no longer bound */
407 t = s;
408 s = s->next;
409 t->next = NULL;
410 }
411 intrfc->if_sklist = NULL;
412 spin_unlock_bh(&intrfc->if_sklist_lock);
413
414 /* remove this interface from list */
415 if (intrfc == ipx_interfaces)
416 ipx_interfaces = intrfc->if_next;
417 else {
418 ipx_interface *i = ipx_interfaces;
419 while (i && i->if_next != intrfc)
420 i = i->if_next;
421 if (i && i->if_next == intrfc)
422 i->if_next = intrfc->if_next;
423 }
424
425 /* remove this interface from *special* networks */
426 if (intrfc == ipx_primary_net)
427 ipxitf_clear_primary_net();
428 if (intrfc == ipx_internal_net)
429 ipx_internal_net = NULL;
430
431 if (intrfc->if_dev)
432 dev_put(intrfc->if_dev);
433 kfree(intrfc);
434 MOD_DEC_USE_COUNT;
435 }
436
437 static void ipxitf_down(ipx_interface *intrfc)
438 {
439 spin_lock_bh(&ipx_interfaces_lock);
440 __ipxitf_down(intrfc);
441 spin_unlock_bh(&ipx_interfaces_lock);
442 }
443
444 static int ipxitf_device_event(struct notifier_block *notifier,
445 unsigned long event, void *ptr)
446 {
447 struct net_device *dev = ptr;
448 ipx_interface *i, *tmp;
449
450 if (event != NETDEV_DOWN && event != NETDEV_UP)
451 goto out;
452
453 spin_lock_bh(&ipx_interfaces_lock);
454 for (i = ipx_interfaces; i;) {
455 tmp = i->if_next;
456 if (i->if_dev == dev) {
457 if (event == NETDEV_UP)
458 ipxitf_hold(i);
459 else
460 __ipxitf_put(i);
461 }
462 i = tmp;
463 }
464 spin_unlock_bh(&ipx_interfaces_lock);
465 out: return NOTIFY_DONE;
466 }
467
468 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
469 {
470 if (sock_queue_rcv_skb(sock, skb) < 0)
471 kfree_skb(skb);
472 }
473
474 /*
475 * On input skb->sk is NULL. Nobody is charged for the memory.
476 */
477
478 /* caller must hold a reference to intrfc */
479
480 #ifdef CONFIG_IPX_INTERN
481 static int ipxitf_demux_socket(ipx_interface *intrfc, struct sk_buff *skb,
482 int copy)
483 {
484 struct ipxhdr *ipx = skb->nh.ipxh;
485 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
486 IPX_NODE_LEN);
487 struct sock *s;
488 int ret;
489
490 spin_lock_bh(&intrfc->if_sklist_lock);
491 s = intrfc->if_sklist;
492
493 while (s) {
494 if (s->protinfo.af_ipx.port == ipx->ipx_dest.sock &&
495 (is_broadcast || !memcmp(ipx->ipx_dest.node,
496 s->protinfo.af_ipx.node,
497 IPX_NODE_LEN))) {
498 /* We found a socket to which to send */
499 struct sk_buff *skb1;
500
501 if (copy) {
502 skb1 = skb_clone(skb, GFP_ATOMIC);
503 ret = -ENOMEM;
504 if (!skb1)
505 goto out;
506 } else {
507 skb1 = skb;
508 copy = 1; /* skb may only be used once */
509 }
510 ipxitf_def_skb_handler(s, skb1);
511
512 /* On an external interface, one socket can listen */
513 if (intrfc != ipx_internal_net)
514 break;
515 }
516 s = s->next;
517 }
518
519 /* skb was solely for us, and we did not make a copy, so free it. */
520 if (!copy)
521 kfree_skb(skb);
522
523 ret = 0;
524 out: spin_unlock_bh(&intrfc->if_sklist_lock);
525 return ret;
526 }
527 #else
528 static struct sock *ncp_connection_hack(ipx_interface *intrfc,
529 struct ipxhdr *ipx)
530 {
531 /* The packet's target is a NCP connection handler. We want to hand it
532 * to the correct socket directly within the kernel, so that the
533 * mars_nwe packet distribution process does not have to do it. Here we
534 * only care about NCP and BURST packets.
535 *
536 * You might call this a hack, but believe me, you do not want a
537 * complete NCP layer in the kernel, and this is VERY fast as well. */
538 struct sock *sk = NULL;
539 int connection = 0;
540 u8 *ncphdr = (u8 *)(ipx + 1);
541
542 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
543 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
544 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
545 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
546
547 if (connection) {
548 /* Now we have to look for a special NCP connection handling
549 * socket. Only these sockets have ipx_ncp_conn != 0, set by
550 * SIOCIPXNCPCONN. */
551 spin_lock_bh(&intrfc->if_sklist_lock);
552 for (sk = intrfc->if_sklist;
553 sk && sk->protinfo.af_ipx.ipx_ncp_conn != connection;
554 sk = sk->next);
555 if (sk)
556 sock_hold(sk);
557 spin_unlock_bh(&intrfc->if_sklist_lock);
558 }
559 return sk;
560 }
561
562 static int ipxitf_demux_socket(ipx_interface *intrfc, struct sk_buff *skb,
563 int copy)
564 {
565 struct ipxhdr *ipx = skb->nh.ipxh;
566 struct sock *sock1 = NULL, *sock2 = NULL;
567 struct sk_buff *skb1 = NULL, *skb2 = NULL;
568 int ret;
569
570 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
571 sock1 = ncp_connection_hack(intrfc, ipx);
572 if (!sock1)
573 /* No special socket found, forward the packet the normal way */
574 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
575
576 /*
577 * We need to check if there is a primary net and if
578 * this is addressed to one of the *SPECIAL* sockets because
579 * these need to be propagated to the primary net.
580 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
581 * 0x456(Diagnostic).
582 */
583
584 if (ipx_primary_net && intrfc != ipx_primary_net) {
585 const int dsock = ntohs(ipx->ipx_dest.sock);
586
587 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
588 /* The appropriate thing to do here is to dup the
589 * packet and route to the primary net interface via
590 * ipxitf_send; however, we'll cheat and just demux it
591 * here. */
592 sock2 = ipxitf_find_socket(ipx_primary_net,
593 ipx->ipx_dest.sock);
594 }
595
596 /*
597 * If there is nothing to do return. The kfree will cancel any charging.
598 */
599 if (!sock1 && !sock2) {
600 if (!copy)
601 kfree_skb(skb);
602 return 0;
603 }
604
605 /*
606 * This next segment of code is a little awkward, but it sets it up
607 * so that the appropriate number of copies of the SKB are made and
608 * that skb1 and skb2 point to it (them) so that it (they) can be
609 * demuxed to sock1 and/or sock2. If we are unable to make enough
610 * copies, we do as much as is possible.
611 */
612
613 if (copy)
614 skb1 = skb_clone(skb, GFP_ATOMIC);
615 else
616 skb1 = skb;
617
618 ret = -ENOMEM;
619 if (!skb1)
620 goto out;
621
622 /* Do we need 2 SKBs? */
623 if (sock1 && sock2)
624 skb2 = skb_clone(skb1, GFP_ATOMIC);
625 else
626 skb2 = skb1;
627
628 if (sock1)
629 ipxitf_def_skb_handler(sock1, skb1);
630
631 ret = -ENOMEM;
632 if (!skb2)
633 goto out;
634
635 if (sock2)
636 ipxitf_def_skb_handler(sock2, skb2);
637
638 ret = 0;
639 out: if (sock1)
640 sock_put(sock1);
641 if (sock2)
642 sock_put(sock2);
643 return ret;
644 }
645 #endif /* CONFIG_IPX_INTERN */
646
647 static struct sk_buff *ipxitf_adjust_skbuff(ipx_interface *intrfc,
648 struct sk_buff *skb)
649 {
650 struct sk_buff *skb2;
651 int in_offset = skb->h.raw - skb->head;
652 int out_offset = intrfc->if_ipx_offset;
653 int len;
654
655 /* Hopefully, most cases */
656 if (in_offset >= out_offset)
657 return skb;
658
659 /* Need new SKB */
660 len = skb->len + out_offset;
661 skb2 = alloc_skb(len, GFP_ATOMIC);
662 if (skb2) {
663 skb_reserve(skb2, out_offset);
664 skb2->nh.raw = skb2->h.raw = skb_put(skb2, skb->len);
665 memcpy(skb2->h.raw, skb->h.raw, skb->len);
666 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
667 }
668 kfree_skb(skb);
669 return skb2;
670 }
671
672 /* caller must hold a reference to intrfc and the skb has to be unshared */
673
674 static int ipxitf_send(ipx_interface *intrfc, struct sk_buff *skb, char *node)
675 {
676 struct ipxhdr *ipx = skb->nh.ipxh;
677 struct net_device *dev = intrfc->if_dev;
678 struct datalink_proto *dl = intrfc->if_dlink;
679 char dest_node[IPX_NODE_LEN];
680 int send_to_wire = 1;
681 int addr_len;
682
683 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
684 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
685 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
686
687 /* see if we need to include the netnum in the route list */
688 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
689 u32 *last_hop = (u32 *)(((u8 *) skb->data) +
690 sizeof(struct ipxhdr) +
691 IPX_SKB_CB(skb)->last_hop.index *
692 sizeof(u32));
693 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
694 IPX_SKB_CB(skb)->last_hop.index = -1;
695 }
696
697 /*
698 * We need to know how many skbuffs it will take to send out this
699 * packet to avoid unnecessary copies.
700 */
701
702 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
703 send_to_wire = 0; /* No non looped */
704
705 /*
706 * See if this should be demuxed to sockets on this interface
707 *
708 * We want to ensure the original was eaten or that we only use
709 * up clones.
710 */
711
712 if (ipx->ipx_dest.net == intrfc->if_netnum) {
713 /*
714 * To our own node, loop and free the original.
715 * The internal net will receive on all node address.
716 */
717 if (intrfc == ipx_internal_net ||
718 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
719 /* Don't charge sender */
720 skb_orphan(skb);
721
722 /* Will charge receiver */
723 return ipxitf_demux_socket(intrfc, skb, 0);
724 }
725
726 /* Broadcast, loop and possibly keep to send on. */
727 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
728 if (!send_to_wire)
729 skb_orphan(skb);
730 ipxitf_demux_socket(intrfc, skb, send_to_wire);
731 if (!send_to_wire)
732 goto out;
733 }
734 }
735
736 /*
737 * If the originating net is not equal to our net; this is routed
738 * We are still charging the sender. Which is right - the driver
739 * free will handle this fairly.
740 */
741 if (ipx->ipx_source.net != intrfc->if_netnum) {
742 /*
743 * Unshare the buffer before modifying the count in
744 * case its a flood or tcpdump
745 */
746 skb = skb_unshare(skb, GFP_ATOMIC);
747 if (!skb)
748 goto out;
749 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
750 send_to_wire = 0;
751 }
752
753 if (!send_to_wire) {
754 kfree_skb(skb);
755 goto out;
756 }
757
758 /* Determine the appropriate hardware address */
759 addr_len = dev->addr_len;
760 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
761 memcpy(dest_node, dev->broadcast, addr_len);
762 else
763 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
764
765 /* Make any compensation for differing physical/data link size */
766 skb = ipxitf_adjust_skbuff(intrfc, skb);
767 if (!skb)
768 goto out;
769
770 /* set up data link and physical headers */
771 skb->dev = dev;
772 skb->protocol = __constant_htons(ETH_P_IPX);
773 dl->datalink_header(dl, skb, dest_node);
774
775 /* Send it out */
776 dev_queue_xmit(skb);
777 out: return 0;
778 }
779
780 static int ipxrtr_add_route(__u32, ipx_interface *, unsigned char *);
781
782 static int ipxitf_add_local_route(ipx_interface *intrfc)
783 {
784 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
785 }
786
787 static const char * ipx_frame_name(unsigned short);
788 static const char * ipx_device_name(ipx_interface *);
789 static void ipxitf_discover_netnum(ipx_interface *intrfc, struct sk_buff *skb);
790 static int ipxitf_pprop(ipx_interface *intrfc, struct sk_buff *skb);
791
792 static int ipxitf_rcv(ipx_interface *intrfc, struct sk_buff *skb)
793 {
794 struct ipxhdr *ipx = skb->nh.ipxh;
795 int ret = 0;
796
797 ipxitf_hold(intrfc);
798
799 /* See if we should update our network number */
800 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
801 ipxitf_discover_netnum(intrfc, skb);
802
803 IPX_SKB_CB(skb)->last_hop.index = -1;
804 if (ipx->ipx_type == IPX_TYPE_PPROP) {
805 ret = ipxitf_pprop(intrfc, skb);
806 if (ret)
807 goto out_free_skb;
808 }
809
810 /* local processing follows */
811 if (!IPX_SKB_CB(skb)->ipx_dest_net)
812 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
813 if (!IPX_SKB_CB(skb)->ipx_source_net)
814 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
815
816 /* it doesn't make sense to route a pprop packet, there's no meaning
817 * in the ipx_dest_net for such packets */
818 if (ipx->ipx_type != IPX_TYPE_PPROP &&
819 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
820 /* We only route point-to-point packets. */
821 if (skb->pkt_type == PACKET_HOST) {
822 skb = skb_unshare(skb, GFP_ATOMIC);
823 if (skb)
824 ret = ipxrtr_route_skb(skb);
825 goto out_intrfc;
826 }
827
828 goto out_free_skb;
829 }
830
831 /* see if we should keep it */
832 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
833 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
834 ret = ipxitf_demux_socket(intrfc, skb, 0);
835 goto out_intrfc;
836 }
837
838 /* we couldn't pawn it off so unload it */
839 out_free_skb:
840 kfree_skb(skb);
841 out_intrfc:
842 ipxitf_put(intrfc);
843 return ret;
844 }
845
846 static void ipxitf_discover_netnum(ipx_interface *intrfc, struct sk_buff *skb)
847 {
848 const struct ipx_cb *cb = IPX_SKB_CB(skb);
849
850 /* see if this is an intra packet: source_net == dest_net */
851 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
852 ipx_interface *i = ipxitf_find_using_net(cb->ipx_source_net);
853 /* NB: NetWare servers lie about their hop count so we
854 * dropped the test based on it. This is the best way
855 * to determine this is a 0 hop count packet. */
856 if (!i) {
857 intrfc->if_netnum = cb->ipx_source_net;
858 ipxitf_add_local_route(intrfc);
859 } else {
860 printk(KERN_WARNING "IPX: Network number collision "
861 "%lx\n %s %s and %s %s\n",
862 (unsigned long) htonl(cb->ipx_source_net),
863 ipx_device_name(i),
864 ipx_frame_name(i->if_dlink_type),
865 ipx_device_name(intrfc),
866 ipx_frame_name(intrfc->if_dlink_type));
867 ipxitf_put(i);
868 }
869 }
870 }
871
872 /**
873 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
874 * NetBIOS broadcasts
875 * @intrfc: IPX interface receiving this packet
876 * @skb: Received packet
877 *
878 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
879 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
880 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
881 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
882 * RIP and SAP Router Specification", Part Number 107-000029-001.
883 *
884 * If it is valid, check if we have pprop broadcasting enabled by the user,
885 * if not, just return zero for local processing.
886 *
887 * If it is enabled check the packet and don't broadcast it if we have already
888 * seen this packet.
889 *
890 * Broadcast: send it to the interfaces that aren't on the packet visited nets
891 * array, just after the IPX header.
892 *
893 * Returns -EINVAL for invalid packets, so that the calling function drops
894 * the packet without local processing. 0 if packet is to be locally processed.
895 */
896 static int ipxitf_pprop(ipx_interface *intrfc, struct sk_buff *skb)
897 {
898 struct ipxhdr *ipx = skb->nh.ipxh;
899 int i, ret = -EINVAL;
900 ipx_interface *ifcs;
901 char *c;
902 u32 *l;
903
904 /* Illegal packet - too many hops or too short */
905 /* We decide to throw it away: no broadcasting, no local processing.
906 * NetBIOS unaware implementations route them as normal packets -
907 * tctrl <= 15, any data payload... */
908 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
909 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
910 IPX_MAX_PPROP_HOPS * sizeof(u32))
911 goto out;
912 /* are we broadcasting this damn thing? */
913 ret = 0;
914 if (!sysctl_ipx_pprop_broadcasting)
915 goto out;
916 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
917 * process it locally. All previous hops broadcasted it, and process it
918 * locally. */
919 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
920 goto out;
921
922 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
923 l = (u32 *) c;
924
925 /* Don't broadcast packet if already seen this net */
926 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
927 if (*l++ == intrfc->if_netnum)
928 goto out;
929
930 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
931 * position where we will insert recvd netnum into list, later on,
932 * in ipxitf_send */
933 IPX_SKB_CB(skb)->last_hop.index = i;
934 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
935 /* xmit on all other interfaces... */
936 spin_lock_bh(&ipx_interfaces_lock);
937 for (ifcs = ipx_interfaces; ifcs; ifcs = ifcs->if_next) {
938 /* Except unconfigured interfaces */
939 if (!ifcs->if_netnum)
940 continue;
941
942 /* That aren't in the list */
943 if (ifcs == intrfc)
944 continue;
945 l = (__u32 *) c;
946 /* don't consider the last entry in the packet list,
947 * it is our netnum, and it is not there yet */
948 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
949 if (ifcs->if_netnum == *l++)
950 break;
951 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
952 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
953
954 if (s) {
955 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
956 ipxrtr_route_skb(s);
957 }
958 }
959 }
960 spin_unlock_bh(&ipx_interfaces_lock);
961 out: return ret;
962 }
963
964 static void ipxitf_insert(ipx_interface *intrfc)
965 {
966 intrfc->if_next = NULL;
967 spin_lock_bh(&ipx_interfaces_lock);
968 if (!ipx_interfaces)
969 ipx_interfaces = intrfc;
970 else {
971 ipx_interface *i = ipx_interfaces;
972 while (i->if_next)
973 i = i->if_next;
974 i->if_next = intrfc;
975 }
976 spin_unlock_bh(&ipx_interfaces_lock);
977
978 if (ipxcfg_auto_select_primary && !ipx_primary_net)
979 ipx_primary_net = intrfc;
980 }
981
982 static ipx_interface *ipxitf_alloc(struct net_device *dev, __u32 netnum,
983 unsigned short dlink_type,
984 struct datalink_proto *dlink,
985 unsigned char internal, int ipx_offset)
986 {
987 ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
988
989 if (intrfc) {
990 intrfc->if_dev = dev;
991 intrfc->if_netnum = netnum;
992 intrfc->if_dlink_type = dlink_type;
993 intrfc->if_dlink = dlink;
994 intrfc->if_internal = internal;
995 intrfc->if_ipx_offset = ipx_offset;
996 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
997 intrfc->if_sklist = NULL;
998 atomic_set(&intrfc->refcnt, 1);
999 spin_lock_init(&intrfc->if_sklist_lock);
1000 MOD_INC_USE_COUNT;
1001 }
1002
1003 return intrfc;
1004 }
1005
1006 static int ipxitf_create_internal(ipx_interface_definition *idef)
1007 {
1008 ipx_interface *intrfc;
1009 int ret = -EEXIST;
1010
1011 /* Only one primary network allowed */
1012 if (ipx_primary_net)
1013 goto out;
1014
1015 /* Must have a valid network number */
1016 ret = -EADDRNOTAVAIL;
1017 if (!idef->ipx_network)
1018 goto out;
1019 intrfc = ipxitf_find_using_net(idef->ipx_network);
1020 ret = -EADDRINUSE;
1021 if (intrfc) {
1022 ipxitf_put(intrfc);
1023 goto out;
1024 }
1025 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
1026 ret = -EAGAIN;
1027 if (!intrfc)
1028 goto out;
1029 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
1030 ipx_internal_net = ipx_primary_net = intrfc;
1031 ipxitf_hold(intrfc);
1032 ipxitf_insert(intrfc);
1033
1034 ret = ipxitf_add_local_route(intrfc);
1035 ipxitf_put(intrfc);
1036 out: return ret;
1037 }
1038
1039 static int ipx_map_frame_type(unsigned char type)
1040 {
1041 int ret = 0;
1042
1043 switch (type) {
1044 case IPX_FRAME_ETHERII:
1045 ret = __constant_htons(ETH_P_IPX);
1046 break;
1047 case IPX_FRAME_8022:
1048 ret = __constant_htons(ETH_P_802_2);
1049 break;
1050 case IPX_FRAME_SNAP:
1051 ret = __constant_htons(ETH_P_SNAP);
1052 break;
1053 case IPX_FRAME_8023:
1054 ret = __constant_htons(ETH_P_802_3);
1055 break;
1056 }
1057
1058 return ret;
1059 }
1060
1061 static int ipxitf_create(ipx_interface_definition *idef)
1062 {
1063 struct net_device *dev;
1064 unsigned short dlink_type = 0;
1065 struct datalink_proto *datalink = NULL;
1066 ipx_interface *intrfc;
1067 int err;
1068
1069 if (idef->ipx_special == IPX_INTERNAL) {
1070 err = ipxitf_create_internal(idef);
1071 goto out;
1072 }
1073
1074 err = -EEXIST;
1075 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
1076 goto out;
1077
1078 intrfc = ipxitf_find_using_net(idef->ipx_network);
1079 err = -EADDRINUSE;
1080 if (idef->ipx_network && intrfc) {
1081 ipxitf_put(intrfc);
1082 goto out;
1083 }
1084
1085 if (intrfc)
1086 ipxitf_put(intrfc);
1087
1088 dev = dev_get_by_name(idef->ipx_device);
1089 err = -ENODEV;
1090 if (!dev)
1091 goto out;
1092
1093 switch (idef->ipx_dlink_type) {
1094 case IPX_FRAME_TR_8022:
1095 printk(KERN_WARNING "IPX frame type 802.2TR is "
1096 "obsolete Use 802.2 instead.\n");
1097 /* fall through */
1098 case IPX_FRAME_8022:
1099 dlink_type = __constant_htons(ETH_P_802_2);
1100 datalink = p8022_datalink;
1101 break;
1102 case IPX_FRAME_ETHERII:
1103 if (dev->type != ARPHRD_IEEE802) {
1104 dlink_type = __constant_htons(ETH_P_IPX);
1105 datalink = pEII_datalink;
1106 break;
1107 } else
1108 printk(KERN_WARNING "IPX frame type EtherII "
1109 "over token-ring is obsolete. Use SNAP "
1110 "instead.\n");
1111 /* fall through */
1112 case IPX_FRAME_SNAP:
1113 dlink_type = __constant_htons(ETH_P_SNAP);
1114 datalink = pSNAP_datalink;
1115 break;
1116 case IPX_FRAME_8023:
1117 dlink_type = __constant_htons(ETH_P_802_3);
1118 datalink = p8023_datalink;
1119 break;
1120 case IPX_FRAME_NONE:
1121 default:
1122 err = -EPROTONOSUPPORT;
1123 goto out_dev;
1124 }
1125
1126 err = -ENETDOWN;
1127 if (!(dev->flags & IFF_UP))
1128 goto out_dev;
1129
1130 /* Check addresses are suitable */
1131 err = -EINVAL;
1132 if (dev->addr_len > IPX_NODE_LEN)
1133 goto out_dev;
1134
1135 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1136 if (!intrfc) {
1137 /* Ok now create */
1138 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1139 datalink, 0, dev->hard_header_len +
1140 datalink->header_length);
1141 err = -EAGAIN;
1142 if (!intrfc)
1143 goto out_dev;
1144 /* Setup primary if necessary */
1145 if (idef->ipx_special == IPX_PRIMARY)
1146 ipx_primary_net = intrfc;
1147 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1148 IPX_NODE_LEN)) {
1149 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1150 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1151 dev->dev_addr, dev->addr_len);
1152 } else
1153 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1154 ipxitf_hold(intrfc);
1155 ipxitf_insert(intrfc);
1156 }
1157
1158
1159 /* If the network number is known, add a route */
1160 err = 0;
1161 if (!intrfc->if_netnum)
1162 goto out_intrfc;
1163
1164 err = ipxitf_add_local_route(intrfc);
1165 out_intrfc:
1166 ipxitf_put(intrfc);
1167 goto out;
1168 out_dev:
1169 dev_put(dev);
1170 out: return err;
1171 }
1172
1173 static int ipxitf_delete(ipx_interface_definition *idef)
1174 {
1175 struct net_device *dev = NULL;
1176 unsigned short dlink_type = 0;
1177 ipx_interface *intrfc;
1178 int ret = 0;
1179
1180 spin_lock_bh(&ipx_interfaces_lock);
1181 if (idef->ipx_special == IPX_INTERNAL) {
1182 if (ipx_internal_net) {
1183 __ipxitf_put(ipx_internal_net);
1184 goto out;
1185 }
1186 ret = -ENOENT;
1187 goto out;
1188 }
1189
1190 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1191 ret = -EPROTONOSUPPORT;
1192 if (!dlink_type)
1193 goto out;
1194
1195 dev = __dev_get_by_name(idef->ipx_device);
1196 ret = -ENODEV;
1197 if (!dev)
1198 goto out;
1199
1200 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1201 ret = -EINVAL;
1202 if (!intrfc)
1203 goto out;
1204 __ipxitf_put(intrfc);
1205
1206 ret = 0;
1207 out: spin_unlock_bh(&ipx_interfaces_lock);
1208 return ret;
1209 }
1210
1211 static ipx_interface *ipxitf_auto_create(struct net_device *dev,
1212 unsigned short dlink_type)
1213 {
1214 ipx_interface *intrfc = NULL;
1215 struct datalink_proto *datalink;
1216
1217 if (!dev)
1218 goto out;
1219
1220 /* Check addresses are suitable */
1221 if (dev->addr_len > IPX_NODE_LEN)
1222 goto out;
1223
1224 switch (htons(dlink_type)) {
1225 case ETH_P_IPX:
1226 datalink = pEII_datalink;
1227 break;
1228
1229 case ETH_P_802_2:
1230 datalink = p8022_datalink;
1231 break;
1232
1233 case ETH_P_SNAP:
1234 datalink = pSNAP_datalink;
1235 break;
1236
1237 case ETH_P_802_3:
1238 datalink = p8023_datalink;
1239 break;
1240
1241 default:
1242 goto out;
1243 }
1244
1245 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1246 dev->hard_header_len + datalink->header_length);
1247
1248 if (intrfc) {
1249 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1250 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1251 dev->dev_addr, dev->addr_len);
1252 spin_lock_init(&intrfc->if_sklist_lock);
1253 atomic_set(&intrfc->refcnt, 1);
1254 ipxitf_insert(intrfc);
1255 dev_hold(dev);
1256 }
1257
1258 out: return intrfc;
1259 }
1260
1261 static int ipxitf_ioctl(unsigned int cmd, void *arg)
1262 {
1263 struct ifreq ifr;
1264 int val;
1265
1266 switch (cmd) {
1267 case SIOCSIFADDR: {
1268 struct sockaddr_ipx *sipx;
1269 ipx_interface_definition f;
1270
1271 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1272 return -EFAULT;
1273
1274 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1275 if (sipx->sipx_family != AF_IPX)
1276 return -EINVAL;
1277
1278 f.ipx_network = sipx->sipx_network;
1279 memcpy(f.ipx_device, ifr.ifr_name,
1280 sizeof(f.ipx_device));
1281 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1282 f.ipx_dlink_type = sipx->sipx_type;
1283 f.ipx_special = sipx->sipx_special;
1284
1285 if (sipx->sipx_action == IPX_DLTITF)
1286 return ipxitf_delete(&f);
1287 else
1288 return ipxitf_create(&f);
1289 }
1290
1291 case SIOCGIFADDR: {
1292 int err = 0;
1293 struct sockaddr_ipx *sipx;
1294 ipx_interface *ipxif;
1295 struct net_device *dev;
1296
1297 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1298 return -EFAULT;
1299
1300 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1301 dev = __dev_get_by_name(ifr.ifr_name);
1302 if (!dev)
1303 return -ENODEV;
1304
1305 ipxif = ipxitf_find_using_phys(dev, ipx_map_frame_type(sipx->sipx_type));
1306 if (!ipxif)
1307 return -EADDRNOTAVAIL;
1308
1309 sipx->sipx_family = AF_IPX;
1310 sipx->sipx_network = ipxif->if_netnum;
1311 memcpy(sipx->sipx_node, ipxif->if_node,
1312 sizeof(sipx->sipx_node));
1313 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1314 err = -EFAULT;
1315
1316 ipxitf_put(ipxif);
1317 return err;
1318 }
1319
1320 case SIOCAIPXITFCRT:
1321 if (get_user(val, (unsigned char *) arg))
1322 return -EFAULT;
1323 ipxcfg_set_auto_create(val);
1324 break;
1325
1326 case SIOCAIPXPRISLT:
1327 if (get_user(val, (unsigned char *) arg))
1328 return -EFAULT;
1329 ipxcfg_set_auto_select(val);
1330 break;
1331
1332 default:
1333 return -EINVAL;
1334 }
1335
1336 return 0;
1337 }
1338
1339 /* Routing tables for the IPX socket layer. */
1340
1341 static inline void ipxrtr_hold(ipx_route *rt)
1342 {
1343 atomic_inc(&rt->refcnt);
1344 }
1345
1346 static inline void ipxrtr_put(ipx_route *rt)
1347 {
1348 if (atomic_dec_and_test(&rt->refcnt))
1349 kfree(rt);
1350 }
1351
1352 static ipx_route *ipxrtr_lookup(__u32 net)
1353 {
1354 ipx_route *r;
1355
1356 read_lock_bh(&ipx_routes_lock);
1357 for (r = ipx_routes; r && r->ir_net != net; r = r->ir_next)
1358 ;
1359 if (r)
1360 ipxrtr_hold(r);
1361 read_unlock_bh(&ipx_routes_lock);
1362
1363 return r;
1364 }
1365
1366 /* caller must hold a reference to intrfc */
1367
1368 static int ipxrtr_add_route(__u32 network, ipx_interface *intrfc,
1369 unsigned char *node)
1370 {
1371 ipx_route *rt;
1372 int ret;
1373
1374 /* Get a route structure; either existing or create */
1375 rt = ipxrtr_lookup(network);
1376 if (!rt) {
1377 rt = kmalloc(sizeof(ipx_route), GFP_ATOMIC);
1378 ret = -EAGAIN;
1379 if (!rt)
1380 goto out;
1381
1382 atomic_set(&rt->refcnt, 1);
1383 ipxrtr_hold(rt);
1384 write_lock_bh(&ipx_routes_lock);
1385 rt->ir_next = ipx_routes;
1386 ipx_routes = rt;
1387 write_unlock_bh(&ipx_routes_lock);
1388 } else {
1389 ret = -EEXIST;
1390 if (intrfc == ipx_internal_net)
1391 goto out_put;
1392 }
1393
1394 rt->ir_net = network;
1395 rt->ir_intrfc = intrfc;
1396 if (!node) {
1397 memset(rt->ir_router_node, '\0', IPX_NODE_LEN);
1398 rt->ir_routed = 0;
1399 } else {
1400 memcpy(rt->ir_router_node, node, IPX_NODE_LEN);
1401 rt->ir_routed = 1;
1402 }
1403
1404 ret = 0;
1405 out_put:
1406 ipxrtr_put(rt);
1407 out: return ret;
1408 }
1409
1410 static void ipxrtr_del_routes(ipx_interface *intrfc)
1411 {
1412 ipx_route **r, *tmp;
1413
1414 write_lock_bh(&ipx_routes_lock);
1415 for (r = &ipx_routes; (tmp = *r) != NULL;) {
1416 if (tmp->ir_intrfc == intrfc) {
1417 *r = tmp->ir_next;
1418 ipxrtr_put(tmp);
1419 } else
1420 r = &(tmp->ir_next);
1421 }
1422 write_unlock_bh(&ipx_routes_lock);
1423 }
1424
1425 static int ipxrtr_create(ipx_route_definition *rd)
1426 {
1427 ipx_interface *intrfc;
1428 int ret = -ENETUNREACH;
1429
1430 /* Find the appropriate interface */
1431 intrfc = ipxitf_find_using_net(rd->ipx_router_network);
1432 if (!intrfc)
1433 goto out;
1434 ret = ipxrtr_add_route(rd->ipx_network, intrfc, rd->ipx_router_node);
1435 ipxitf_put(intrfc);
1436 out: return ret;
1437 }
1438
1439 static int ipxrtr_delete(long net)
1440 {
1441 ipx_route **r;
1442 ipx_route *tmp;
1443 int err;
1444
1445 write_lock_bh(&ipx_routes_lock);
1446 for (r = &ipx_routes; (tmp = *r) != NULL;) {
1447 if (tmp->ir_net == net) {
1448 /* Directly connected; can't lose route */
1449 err = -EPERM;
1450 if (!tmp->ir_routed)
1451 goto out;
1452
1453 *r = tmp->ir_next;
1454 ipxrtr_put(tmp);
1455 err = 0;
1456 goto out;
1457 }
1458
1459 r = &(tmp->ir_next);
1460 }
1461 err = -ENOENT;
1462 out: write_unlock_bh(&ipx_routes_lock);
1463 return err;
1464 }
1465
1466 /*
1467 * Checksum routine for IPX
1468 */
1469
1470 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1471 /* This functions should *not* mess with packet contents */
1472
1473 static __u16 ipx_cksum(struct ipxhdr *packet, int length)
1474 {
1475 /*
1476 * NOTE: sum is a net byte order quantity, which optimizes the
1477 * loop. This only works on big and little endian machines. (I
1478 * don't know of a machine that isn't.)
1479 */
1480 /* start at ipx_dest - We skip the checksum field and start with
1481 * ipx_type before the loop, not considering ipx_tctrl in the calc */
1482 __u16 *p = (__u16 *)&packet->ipx_dest;
1483 __u32 i = (length >> 1) - 1; /* Number of complete words */
1484 __u32 sum = packet->ipx_type << sizeof(packet->ipx_tctrl);
1485
1486 /* Loop through all complete words except the checksum field,
1487 * ipx_type (accounted above) and ipx_tctrl (not used in the cksum) */
1488 while (--i)
1489 sum += *p++;
1490
1491 /* Add on the last part word if it exists */
1492 if (packet->ipx_pktsize & __constant_htons(1))
1493 sum += ntohs(0xff00) & *p;
1494
1495 /* Do final fixup */
1496 sum = (sum & 0xffff) + (sum >> 16);
1497
1498 /* It's a pity there's no concept of carry in C */
1499 if (sum >= 0x10000)
1500 sum++;
1501
1502 return ~sum;
1503 }
1504
1505 /*
1506 * Route an outgoing frame from a socket.
1507 */
1508 static int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
1509 struct iovec *iov, int len, int noblock)
1510 {
1511 struct sk_buff *skb;
1512 ipx_interface *intrfc;
1513 struct ipxhdr *ipx;
1514 int size;
1515 int ipx_offset;
1516 ipx_route *rt = NULL;
1517 int err;
1518
1519 /* Find the appropriate interface on which to send packet */
1520 if (!usipx->sipx_network && ipx_primary_net) {
1521 usipx->sipx_network = ipx_primary_net->if_netnum;
1522 intrfc = ipx_primary_net;
1523 } else {
1524 rt = ipxrtr_lookup(usipx->sipx_network);
1525 err = -ENETUNREACH;
1526 if (!rt)
1527 goto out;
1528 intrfc = rt->ir_intrfc;
1529 }
1530
1531 ipxitf_hold(intrfc);
1532 ipx_offset = intrfc->if_ipx_offset;
1533 size = sizeof(struct ipxhdr) + len + ipx_offset;
1534
1535 skb = sock_alloc_send_skb(sk, size, noblock, &err);
1536 if (!skb)
1537 goto out_put;
1538
1539 skb_reserve(skb, ipx_offset);
1540 skb->sk = sk;
1541
1542 /* Fill in IPX header */
1543 ipx = (struct ipxhdr *)skb_put(skb, sizeof(struct ipxhdr));
1544 ipx->ipx_pktsize = htons(len + sizeof(struct ipxhdr));
1545 IPX_SKB_CB(skb)->ipx_tctrl = 0;
1546 ipx->ipx_type = usipx->sipx_type;
1547 skb->h.raw = (void *)skb->nh.ipxh = ipx;
1548
1549 IPX_SKB_CB(skb)->last_hop.index = -1;
1550 #ifdef CONFIG_IPX_INTERN
1551 IPX_SKB_CB(skb)->ipx_source_net = sk->protinfo.af_ipx.intrfc->if_netnum;
1552 memcpy(ipx->ipx_source.node, sk->protinfo.af_ipx.node, IPX_NODE_LEN);
1553 #else
1554 err = ntohs(sk->protinfo.af_ipx.port);
1555 if (err == 0x453 || err == 0x452) {
1556 /* RIP/SAP special handling for mars_nwe */
1557 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
1558 memcpy(ipx->ipx_source.node, intrfc->if_node, IPX_NODE_LEN);
1559 } else {
1560 IPX_SKB_CB(skb)->ipx_source_net =
1561 sk->protinfo.af_ipx.intrfc->if_netnum;
1562 memcpy(ipx->ipx_source.node, sk->protinfo.af_ipx.intrfc->if_node, IPX_NODE_LEN);
1563 }
1564 #endif /* CONFIG_IPX_INTERN */
1565 ipx->ipx_source.sock = sk->protinfo.af_ipx.port;
1566 IPX_SKB_CB(skb)->ipx_dest_net = usipx->sipx_network;
1567 memcpy(ipx->ipx_dest.node, usipx->sipx_node, IPX_NODE_LEN);
1568 ipx->ipx_dest.sock = usipx->sipx_port;
1569
1570 err = memcpy_fromiovec(skb_put(skb, len), iov, len);
1571 if (err) {
1572 kfree_skb(skb);
1573 goto out_put;
1574 }
1575
1576 /* Apply checksum. Not allowed on 802.3 links. */
1577 if (sk->no_check || intrfc->if_dlink_type == IPX_FRAME_8023)
1578 ipx->ipx_checksum = 0xFFFF;
1579 else
1580 ipx->ipx_checksum = ipx_cksum(ipx, len + sizeof(struct ipxhdr));
1581
1582 err = ipxitf_send(intrfc, skb, (rt && rt->ir_routed) ?
1583 rt->ir_router_node : ipx->ipx_dest.node);
1584 out_put:
1585 ipxitf_put(intrfc);
1586 if (rt)
1587 ipxrtr_put(rt);
1588 out: return err;
1589 }
1590
1591 /* the skb has to be unshared, we'll end up calling ipxitf_send, that'll
1592 * modify the packet */
1593 int ipxrtr_route_skb(struct sk_buff *skb)
1594 {
1595 struct ipxhdr *ipx = skb->nh.ipxh;
1596 ipx_route *r = ipxrtr_lookup(IPX_SKB_CB(skb)->ipx_dest_net);
1597
1598 if (!r) { /* no known route */
1599 kfree_skb(skb);
1600 return 0;
1601 }
1602
1603 ipxitf_hold(r->ir_intrfc);
1604 ipxitf_send(r->ir_intrfc, skb, r->ir_routed ?
1605 r->ir_router_node : ipx->ipx_dest.node);
1606 ipxitf_put(r->ir_intrfc);
1607 ipxrtr_put(r);
1608
1609 return 0;
1610 }
1611
1612 /*
1613 * We use a normal struct rtentry for route handling
1614 */
1615 static int ipxrtr_ioctl(unsigned int cmd, void *arg)
1616 {
1617 struct rtentry rt; /* Use these to behave like 'other' stacks */
1618 struct sockaddr_ipx *sg, *st;
1619 int ret = -EFAULT;
1620
1621 if (copy_from_user(&rt, arg, sizeof(rt)))
1622 goto out;
1623
1624 sg = (struct sockaddr_ipx *)&rt.rt_gateway;
1625 st = (struct sockaddr_ipx *)&rt.rt_dst;
1626
1627 ret = -EINVAL;
1628 if (!(rt.rt_flags & RTF_GATEWAY) || /* Direct routes are fixed */
1629 sg->sipx_family != AF_IPX ||
1630 st->sipx_family != AF_IPX)
1631 goto out;
1632
1633 switch (cmd) {
1634 case SIOCDELRT:
1635 ret = ipxrtr_delete(st->sipx_network);
1636 break;
1637 case SIOCADDRT: {
1638 struct ipx_route_definition f;
1639 f.ipx_network = st->sipx_network;
1640 f.ipx_router_network = sg->sipx_network;
1641 memcpy(f.ipx_router_node, sg->sipx_node, IPX_NODE_LEN);
1642 ret = ipxrtr_create(&f);
1643 break;
1644 }
1645 }
1646
1647 out: return ret;
1648 }
1649
1650 static const char *ipx_frame_name(unsigned short frame)
1651 {
1652 char* ret = "None";
1653
1654 switch (ntohs(frame)) {
1655 case ETH_P_IPX: ret = "EtherII"; break;
1656 case ETH_P_802_2: ret = "802.2"; break;
1657 case ETH_P_SNAP: ret = "SNAP"; break;
1658 case ETH_P_802_3: ret = "802.3"; break;
1659 case ETH_P_TR_802_2: ret = "802.2TR"; break;
1660 }
1661
1662 return ret;
1663 }
1664
1665 static const char *ipx_device_name(ipx_interface *intrfc)
1666 {
1667 return intrfc->if_internal ? "Internal" :
1668 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1669 }
1670
1671 /* Called from proc fs */
1672 static int ipx_interface_get_info(char *buffer, char **start, off_t offset,
1673 int length)
1674 {
1675 ipx_interface *i;
1676 off_t begin = 0, pos = 0;
1677 int len = 0;
1678
1679 /* Theory.. Keep printing in the same place until we pass offset */
1680
1681 len += sprintf(buffer, "%-11s%-15s%-9s%-11s%s", "Network",
1682 "Node_Address", "Primary", "Device", "Frame_Type");
1683 #ifdef IPX_REFCNT_DEBUG
1684 len += sprintf(buffer + len, " refcnt");
1685 #endif
1686 strcat(buffer + len++, "\n");
1687 spin_lock_bh(&ipx_interfaces_lock);
1688 for (i = ipx_interfaces; i; i = i->if_next) {
1689 len += sprintf(buffer + len, "%08lX ",
1690 (long unsigned int) ntohl(i->if_netnum));
1691 len += sprintf(buffer + len, "%02X%02X%02X%02X%02X%02X ",
1692 i->if_node[0], i->if_node[1], i->if_node[2],
1693 i->if_node[3], i->if_node[4], i->if_node[5]);
1694 len += sprintf(buffer + len, "%-9s", i == ipx_primary_net ?
1695 "Yes" : "No");
1696 len += sprintf(buffer + len, "%-11s", ipx_device_name(i));
1697 len += sprintf(buffer + len, "%-9s",
1698 ipx_frame_name(i->if_dlink_type));
1699 #ifdef IPX_REFCNT_DEBUG
1700 len += sprintf(buffer + len, "%6d", atomic_read(&i->refcnt));
1701 #endif
1702 strcat(buffer + len++, "\n");
1703 /* Are we still dumping unwanted data then discard the record */
1704 pos = begin + len;
1705
1706 if (pos < offset) {
1707 len = 0; /* Keep dumping into the buffer start */
1708 begin = pos;
1709 }
1710 if (pos > offset + length) /* We have dumped enough */
1711 break;
1712 }
1713 spin_unlock_bh(&ipx_interfaces_lock);
1714
1715 /* The data in question runs from begin to begin+len */
1716 *start = buffer + (offset - begin); /* Start of wanted data */
1717 len -= (offset - begin); /* Remove unwanted header data from length */
1718 if (len > length)
1719 len = length; /* Remove unwanted tail data from length */
1720
1721 return len;
1722 }
1723
1724 static int ipx_get_info(char *buffer, char **start, off_t offset, int length)
1725 {
1726 struct sock *s;
1727 ipx_interface *i;
1728 off_t begin = 0, pos = 0;
1729 int len = 0;
1730
1731 /* Theory.. Keep printing in the same place until we pass offset */
1732
1733 #ifdef CONFIG_IPX_INTERN
1734 len += sprintf(buffer, "%-28s%-28s%-10s%-10s%-7s%s\n", "Local_Address",
1735 #else
1736 len += sprintf(buffer, "%-15s%-28s%-10s%-10s%-7s%s\n", "Local_Address",
1737 #endif /* CONFIG_IPX_INTERN */
1738 "Remote_Address", "Tx_Queue", "Rx_Queue",
1739 "State", "Uid");
1740
1741 spin_lock_bh(&ipx_interfaces_lock);
1742 for (i = ipx_interfaces; i; i = i->if_next) {
1743 ipxitf_hold(i);
1744 spin_lock_bh(&i->if_sklist_lock);
1745 for (s = i->if_sklist; s; s = s->next) {
1746 #ifdef CONFIG_IPX_INTERN
1747 len += sprintf(buffer + len,
1748 "%08lX:%02X%02X%02X%02X%02X%02X:%04X ",
1749 (unsigned long) htonl(s->protinfo.af_ipx.intrfc->if_netnum),
1750 s->protinfo.af_ipx.node[0],
1751 s->protinfo.af_ipx.node[1],
1752 s->protinfo.af_ipx.node[2],
1753 s->protinfo.af_ipx.node[3],
1754 s->protinfo.af_ipx.node[4],
1755 s->protinfo.af_ipx.node[5],
1756 htons(s->protinfo.af_ipx.port));
1757 #else
1758 len += sprintf(buffer + len, "%08lX:%04X ",
1759 (unsigned long) htonl(i->if_netnum),
1760 htons(s->protinfo.af_ipx.port));
1761 #endif /* CONFIG_IPX_INTERN */
1762 if (s->state != TCP_ESTABLISHED)
1763 len += sprintf(buffer + len, "%-28s",
1764 "Not_Connected");
1765 else {
1766 len += sprintf(buffer + len,
1767 "%08lX:%02X%02X%02X%02X%02X%02X:%04X ",
1768 (unsigned long) htonl(s->protinfo.af_ipx.dest_addr.net),
1769 s->protinfo.af_ipx.dest_addr.node[0],
1770 s->protinfo.af_ipx.dest_addr.node[1],
1771 s->protinfo.af_ipx.dest_addr.node[2],
1772 s->protinfo.af_ipx.dest_addr.node[3],
1773 s->protinfo.af_ipx.dest_addr.node[4],
1774 s->protinfo.af_ipx.dest_addr.node[5],
1775 htons(s->protinfo.af_ipx.dest_addr.sock));
1776 }
1777
1778 len += sprintf(buffer + len, "%08X %08X ",
1779 atomic_read(&s->wmem_alloc),
1780 atomic_read(&s->rmem_alloc));
1781 len += sprintf(buffer + len, "%02X %03d\n",
1782 s->state, SOCK_INODE(s->socket)->i_uid);
1783
1784 pos = begin + len;
1785 if (pos < offset) {
1786 len = 0;
1787 begin = pos;
1788 }
1789
1790 if (pos > offset + length) /* We have dumped enough */
1791 break;
1792 }
1793 spin_unlock_bh(&i->if_sklist_lock);
1794 ipxitf_put(i);
1795 }
1796 spin_unlock_bh(&ipx_interfaces_lock);
1797
1798 /* The data in question runs from begin to begin+len */
1799 *start = buffer + offset - begin;
1800 len -= (offset - begin);
1801 if (len > length)
1802 len = length;
1803
1804 return len;
1805 }
1806
1807 static int ipx_rt_get_info(char *buffer, char **start, off_t offset, int length)
1808 {
1809 ipx_route *rt;
1810 off_t begin = 0, pos = 0;
1811 int len = 0;
1812
1813 len += sprintf(buffer, "%-11s%-13s%s\n",
1814 "Network", "Router_Net", "Router_Node");
1815 read_lock_bh(&ipx_routes_lock);
1816 for (rt = ipx_routes; rt; rt = rt->ir_next) {
1817 len += sprintf(buffer + len, "%08lX ",
1818 (long unsigned int) ntohl(rt->ir_net));
1819 if (rt->ir_routed) {
1820 len += sprintf(buffer + len,
1821 "%08lX %02X%02X%02X%02X%02X%02X\n",
1822 (long unsigned int) ntohl(rt->ir_intrfc->if_netnum),
1823 rt->ir_router_node[0], rt->ir_router_node[1],
1824 rt->ir_router_node[2], rt->ir_router_node[3],
1825 rt->ir_router_node[4], rt->ir_router_node[5]);
1826 } else {
1827 len += sprintf(buffer + len, "%-13s%s\n",
1828 "Directly", "Connected");
1829 }
1830
1831 pos = begin + len;
1832 if (pos < offset) {
1833 len = 0;
1834 begin = pos;
1835 }
1836
1837 if (pos > offset + length)
1838 break;
1839 }
1840 read_unlock_bh(&ipx_routes_lock);
1841
1842 *start = buffer + (offset - begin);
1843 len -= (offset - begin);
1844 if (len > length)
1845 len = length;
1846
1847 return len;
1848 }
1849
1850 /* Handling for system calls applied via the various interfaces to an IPX
1851 * socket object. */
1852
1853 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1854 char *optval, int optlen)
1855 {
1856 struct sock *sk = sock->sk;
1857 int opt;
1858 int ret = -EINVAL;
1859
1860 if (optlen != sizeof(int))
1861 goto out;
1862
1863 ret = -EFAULT;
1864 if (get_user(opt, (unsigned int *)optval))
1865 goto out;
1866
1867 ret = -ENOPROTOOPT;
1868 if (!(level == SOL_IPX && optname == IPX_TYPE))
1869 goto out;
1870
1871 sk->protinfo.af_ipx.type = opt;
1872 ret = 0;
1873 out: return ret;
1874 }
1875
1876 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1877 char *optval, int *optlen)
1878 {
1879 struct sock *sk = sock->sk;
1880 int val = 0;
1881 int len;
1882 int ret = -ENOPROTOOPT;
1883
1884 if (!(level == SOL_IPX && optname == IPX_TYPE))
1885 goto out;
1886
1887 val = sk->protinfo.af_ipx.type;
1888
1889 ret = -EFAULT;
1890 if (get_user(len, optlen))
1891 goto out;
1892
1893 len = min_t(unsigned int, len, sizeof(int));
1894 ret = -EINVAL;
1895 if(len < 0)
1896 goto out;
1897
1898 ret = -EFAULT;
1899 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1900 goto out;
1901
1902 ret = 0;
1903 out: return ret;
1904 }
1905
1906 static int ipx_create(struct socket *sock, int protocol)
1907 {
1908 int ret = -ESOCKTNOSUPPORT;
1909 struct sock *sk;
1910
1911 switch (sock->type) {
1912 case SOCK_DGRAM:
1913 sk = sk_alloc(PF_IPX, GFP_KERNEL, 1);
1914 ret = -ENOMEM;
1915 if (!sk)
1916 goto out;
1917 sock->ops = &ipx_dgram_ops;
1918 break;
1919
1920 case SOCK_SEQPACKET:
1921 /*
1922 * From this point on SPX sockets are handled
1923 * by af_spx.c and the methods replaced.
1924 */
1925 if (spx_family_ops) {
1926 ret = spx_family_ops->create(sock, protocol);
1927 goto out;
1928 }
1929 /* Fall through if SPX is not loaded */
1930 case SOCK_STREAM: /* Allow higher levels to piggyback */
1931 default:
1932 goto out;
1933 }
1934 #ifdef IPX_REFCNT_DEBUG
1935 atomic_inc(&ipx_sock_nr);
1936 printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk,
1937 atomic_read(&ipx_sock_nr));
1938 #endif
1939 sock_init_data(sock, sk);
1940 sk->destruct = NULL;
1941 sk->no_check = 1; /* Checksum off by default */
1942
1943 MOD_INC_USE_COUNT;
1944 ret = 0;
1945 out: return ret;
1946 }
1947
1948 static int ipx_release(struct socket *sock)
1949 {
1950 struct sock *sk = sock->sk;
1951
1952 if (!sk)
1953 goto out;
1954
1955 if (!sk->dead)
1956 sk->state_change(sk);
1957
1958 sk->dead = 1;
1959 sock->sk = NULL;
1960 ipx_destroy_socket(sk);
1961
1962 if (sock->type == SOCK_DGRAM)
1963 MOD_DEC_USE_COUNT;
1964
1965 out: return 0;
1966 }
1967
1968 /* caller must hold a reference to intrfc */
1969
1970 static unsigned short ipx_first_free_socketnum(ipx_interface *intrfc)
1971 {
1972 unsigned short socketNum = intrfc->if_sknum;
1973
1974 spin_lock_bh(&intrfc->if_sklist_lock);
1975
1976 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1977 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1978
1979 while (__ipxitf_find_socket(intrfc, ntohs(socketNum)))
1980 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1981 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1982 else
1983 socketNum++;
1984
1985 spin_unlock_bh(&intrfc->if_sklist_lock);
1986 intrfc->if_sknum = socketNum;
1987
1988 return ntohs(socketNum);
1989 }
1990
1991 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1992 {
1993 struct sock *sk = sock->sk;
1994 ipx_interface *intrfc;
1995 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1996 int ret = -EINVAL;
1997
1998 if (!sk->zapped || addr_len != sizeof(struct sockaddr_ipx))
1999 goto out;
2000
2001 intrfc = ipxitf_find_using_net(addr->sipx_network);
2002 ret = -EADDRNOTAVAIL;
2003 if (!intrfc)
2004 goto out;
2005
2006 if (!addr->sipx_port) {
2007 addr->sipx_port = ipx_first_free_socketnum(intrfc);
2008 ret = -EINVAL;
2009 if (!addr->sipx_port)
2010 goto out_put;
2011 }
2012
2013 /* protect IPX system stuff like routing/sap */
2014 ret = -EACCES;
2015 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
2016 !capable(CAP_NET_ADMIN))
2017 goto out_put;
2018
2019 sk->protinfo.af_ipx.port = addr->sipx_port;
2020
2021 #ifdef CONFIG_IPX_INTERN
2022 if (intrfc == ipx_internal_net) {
2023 /* The source address is to be set explicitly if the
2024 * socket is to be bound on the internal network. If a
2025 * node number 0 was specified, the default is used.
2026 */
2027
2028 ret = -EINVAL;
2029 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
2030 goto out_put;
2031 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
2032 memcpy(sk->protinfo.af_ipx.node, intrfc->if_node,
2033 IPX_NODE_LEN);
2034 else
2035 memcpy(sk->protinfo.af_ipx.node, addr->sipx_node,
2036 IPX_NODE_LEN);
2037
2038 ret = -EADDRINUSE;
2039 if (ipxitf_find_internal_socket(intrfc,
2040 sk->protinfo.af_ipx.node,
2041 sk->protinfo.af_ipx.port)) {
2042 SOCK_DEBUG(sk,
2043 "IPX: bind failed because port %X in use.\n",
2044 ntohs((int)addr->sipx_port));
2045 goto out_put;
2046 }
2047 } else {
2048 /* Source addresses are easy. It must be our
2049 * network:node pair for an interface routed to IPX
2050 * with the ipx routing ioctl()
2051 */
2052
2053 memcpy(sk->protinfo.af_ipx.node, intrfc->if_node,
2054 IPX_NODE_LEN);
2055
2056 ret = -EADDRINUSE;
2057 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
2058 SOCK_DEBUG(sk,
2059 "IPX: bind failed because port %X in use.\n",
2060 ntohs((int)addr->sipx_port));
2061 goto out_put;
2062 }
2063 }
2064
2065 #else /* !def CONFIG_IPX_INTERN */
2066
2067 /* Source addresses are easy. It must be our network:node pair for
2068 an interface routed to IPX with the ipx routing ioctl() */
2069
2070 ret = -EADDRINUSE;
2071 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
2072 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
2073 ntohs((int)addr->sipx_port));
2074 goto out_put;
2075 }
2076
2077 #endif /* CONFIG_IPX_INTERN */
2078
2079 ipxitf_insert_socket(intrfc, sk);
2080 sk->zapped = 0;
2081 SOCK_DEBUG(sk, "IPX: bound socket 0x%04X.\n", ntohs(addr->sipx_port) );
2082
2083 ret = 0;
2084 out_put:
2085 ipxitf_put(intrfc);
2086 out: return ret;
2087 }
2088
2089 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
2090 int addr_len, int flags)
2091 {
2092 struct sock *sk = sock->sk;
2093 struct sockaddr_ipx *addr;
2094 int ret = -EINVAL;
2095 ipx_route *rt;
2096
2097 sk->state = TCP_CLOSE;
2098 sock->state = SS_UNCONNECTED;
2099
2100 if (addr_len != sizeof(*addr))
2101 goto out;
2102 addr = (struct sockaddr_ipx *)uaddr;
2103
2104 /* put the autobinding in */
2105 if (!sk->protinfo.af_ipx.port) {
2106 struct sockaddr_ipx uaddr;
2107
2108 uaddr.sipx_port = 0;
2109 uaddr.sipx_network = 0;
2110
2111 #ifdef CONFIG_IPX_INTERN
2112 ret = -ENETDOWN;
2113 if (!sk->protinfo.af_ipx.intrfc)
2114 goto out; /* Someone zonked the iface */
2115 memcpy(uaddr.sipx_node, sk->protinfo.af_ipx.intrfc->if_node,
2116 IPX_NODE_LEN);
2117 #endif /* CONFIG_IPX_INTERN */
2118
2119 ret = ipx_bind(sock, (struct sockaddr *)&uaddr,
2120 sizeof(struct sockaddr_ipx));
2121 if (ret)
2122 goto out;
2123 }
2124
2125 /* We can either connect to primary network or somewhere
2126 * we can route to */
2127 rt = ipxrtr_lookup(addr->sipx_network);
2128 ret = -ENETUNREACH;
2129 if (!rt && !(!addr->sipx_network && ipx_primary_net))
2130 goto out;
2131
2132 sk->protinfo.af_ipx.dest_addr.net = addr->sipx_network;
2133 sk->protinfo.af_ipx.dest_addr.sock = addr->sipx_port;
2134 memcpy(sk->protinfo.af_ipx.dest_addr.node,
2135 addr->sipx_node, IPX_NODE_LEN);
2136 sk->protinfo.af_ipx.type = addr->sipx_type;
2137
2138 if (sock->type == SOCK_DGRAM) {
2139 sock->state = SS_CONNECTED;
2140 sk->state = TCP_ESTABLISHED;
2141 }
2142
2143 if (rt)
2144 ipxrtr_put(rt);
2145 ret = 0;
2146 out: return ret;
2147 }
2148
2149
2150 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
2151 int *uaddr_len, int peer)
2152 {
2153 ipx_address *addr;
2154 struct sockaddr_ipx sipx;
2155 struct sock *sk = sock->sk;
2156 int ret;
2157
2158 *uaddr_len = sizeof(struct sockaddr_ipx);
2159
2160 if (peer) {
2161 ret = -ENOTCONN;
2162 if (sk->state != TCP_ESTABLISHED)
2163 goto out;
2164
2165 addr = &sk->protinfo.af_ipx.dest_addr;
2166 sipx.sipx_network = addr->net;
2167 sipx.sipx_port = addr->sock;
2168 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
2169 } else {
2170 if (sk->protinfo.af_ipx.intrfc) {
2171 sipx.sipx_network =
2172 sk->protinfo.af_ipx.intrfc->if_netnum;
2173 #ifdef CONFIG_IPX_INTERN
2174 memcpy(sipx.sipx_node, sk->protinfo.af_ipx.node,
2175 IPX_NODE_LEN);
2176 #else
2177 memcpy(sipx.sipx_node,
2178 sk->protinfo.af_ipx.intrfc->if_node,
2179 IPX_NODE_LEN);
2180 #endif /* CONFIG_IPX_INTERN */
2181
2182 } else {
2183 sipx.sipx_network = 0;
2184 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
2185 }
2186
2187 sipx.sipx_port = sk->protinfo.af_ipx.port;
2188 }
2189
2190 sipx.sipx_family = AF_IPX;
2191 sipx.sipx_type = sk->protinfo.af_ipx.type;
2192 memcpy(uaddr, &sipx, sizeof(sipx));
2193
2194 ret = 0;
2195 out: return ret;
2196 }
2197
2198 int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
2199 {
2200 /* NULL here for pt means the packet was looped back */
2201 ipx_interface *intrfc;
2202 struct ipxhdr *ipx;
2203 u16 ipx_pktsize;
2204 int ret = 0;
2205
2206 /* Not ours */
2207 if (skb->pkt_type == PACKET_OTHERHOST)
2208 goto drop;
2209
2210 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
2211 goto out;
2212
2213 ipx = skb->nh.ipxh;
2214 ipx_pktsize = ntohs(ipx->ipx_pktsize);
2215
2216 /* Too small or invalid header? */
2217 if (ipx_pktsize < sizeof(struct ipxhdr) || ipx_pktsize > skb->len)
2218 goto drop;
2219
2220 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
2221 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
2222 goto drop;
2223
2224 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
2225 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
2226 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
2227
2228 /* Determine what local ipx endpoint this is */
2229 intrfc = ipxitf_find_using_phys(dev, pt->type);
2230 if (!intrfc) {
2231 if (ipxcfg_auto_create_interfaces &&
2232 ntohl(IPX_SKB_CB(skb)->ipx_dest_net)) {
2233 intrfc = ipxitf_auto_create(dev, pt->type);
2234 if (intrfc)
2235 ipxitf_hold(intrfc);
2236 }
2237
2238 if (!intrfc) /* Not one of ours */
2239 /* or invalid packet for auto creation */
2240 goto drop;
2241 }
2242
2243 ret = ipxitf_rcv(intrfc, skb);
2244 ipxitf_put(intrfc);
2245 goto out;
2246 drop: kfree_skb(skb);
2247 out: return ret;
2248 }
2249
2250 static int ipx_sendmsg(struct socket *sock, struct msghdr *msg, int len,
2251 struct scm_cookie *scm)
2252 {
2253 struct sock *sk = sock->sk;
2254 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
2255 struct sockaddr_ipx local_sipx;
2256 int ret = -EINVAL;
2257 int flags = msg->msg_flags;
2258
2259 /* Socket gets bound below anyway */
2260 /* if (sk->zapped)
2261 return -EIO; */ /* Socket not bound */
2262 if (flags & ~MSG_DONTWAIT)
2263 goto out;
2264
2265 if (usipx) {
2266 if (!sk->protinfo.af_ipx.port) {
2267 struct sockaddr_ipx uaddr;
2268
2269 uaddr.sipx_port = 0;
2270 uaddr.sipx_network = 0;
2271 #ifdef CONFIG_IPX_INTERN
2272 ret = -ENETDOWN;
2273 if (!sk->protinfo.af_ipx.intrfc)
2274 goto out; /* Someone zonked the iface */
2275 memcpy(uaddr.sipx_node,
2276 sk->protinfo.af_ipx.intrfc->if_node,
2277 IPX_NODE_LEN);
2278 #endif
2279 ret = ipx_bind(sock, (struct sockaddr *)&uaddr,
2280 sizeof(struct sockaddr_ipx));
2281 if (ret)
2282 goto out;
2283 }
2284
2285 ret = -EINVAL;
2286 if (msg->msg_namelen < sizeof(*usipx) ||
2287 usipx->sipx_family != AF_IPX)
2288 goto out;
2289 } else {
2290 ret = -ENOTCONN;
2291 if (sk->state != TCP_ESTABLISHED)
2292 goto out;
2293
2294 usipx = &local_sipx;
2295 usipx->sipx_family = AF_IPX;
2296 usipx->sipx_type = sk->protinfo.af_ipx.type;
2297 usipx->sipx_port = sk->protinfo.af_ipx.dest_addr.sock;
2298 usipx->sipx_network = sk->protinfo.af_ipx.dest_addr.net;
2299 memcpy(usipx->sipx_node, sk->protinfo.af_ipx.dest_addr.node,
2300 IPX_NODE_LEN);
2301 }
2302
2303 ret = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
2304 flags & MSG_DONTWAIT);
2305 if (ret >= 0)
2306 ret = len;
2307 out: return ret;
2308 }
2309
2310
2311 static int ipx_recvmsg(struct socket *sock, struct msghdr *msg, int size,
2312 int flags, struct scm_cookie *scm)
2313 {
2314 struct sock *sk = sock->sk;
2315 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
2316 struct ipxhdr *ipx = NULL;
2317 struct sk_buff *skb;
2318 int copied, err;
2319
2320 /* put the autobinding in */
2321 if (!sk->protinfo.af_ipx.port) {
2322 struct sockaddr_ipx uaddr;
2323
2324 uaddr.sipx_port = 0;
2325 uaddr.sipx_network = 0;
2326
2327 #ifdef CONFIG_IPX_INTERN
2328 err = -ENETDOWN;
2329 if (!sk->protinfo.af_ipx.intrfc)
2330 goto out; /* Someone zonked the iface */
2331 memcpy(uaddr.sipx_node,
2332 sk->protinfo.af_ipx.intrfc->if_node, IPX_NODE_LEN);
2333 #endif /* CONFIG_IPX_INTERN */
2334
2335 err = ipx_bind(sock, (struct sockaddr *)&uaddr,
2336 sizeof(struct sockaddr_ipx));
2337 if (err)
2338 goto out;
2339 }
2340
2341 err = -ENOTCONN;
2342 if (sk->zapped)
2343 goto out;
2344
2345 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
2346 flags & MSG_DONTWAIT, &err);
2347 if (!skb)
2348 goto out;
2349
2350 ipx = skb->nh.ipxh;
2351 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
2352 if (copied > size) {
2353 copied = size;
2354 msg->msg_flags |= MSG_TRUNC;
2355 }
2356
2357 err = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
2358 copied);
2359 if (err)
2360 goto out_free;
2361 sk->stamp = skb->stamp;
2362
2363 msg->msg_namelen = sizeof(*sipx);
2364
2365 if (sipx) {
2366 sipx->sipx_family = AF_IPX;
2367 sipx->sipx_port = ipx->ipx_source.sock;
2368 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
2369 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
2370 sipx->sipx_type = ipx->ipx_type;
2371 }
2372 err = copied;
2373
2374 out_free:
2375 skb_free_datagram(sk, skb);
2376 out: return err;
2377 }
2378
2379
2380 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
2381 {
2382 long amount = 0;
2383 struct sock *sk = sock->sk;
2384
2385 switch (cmd) {
2386 case TIOCOUTQ:
2387 amount = sk->sndbuf - atomic_read(&sk->wmem_alloc);
2388 if (amount < 0)
2389 amount = 0;
2390 return put_user(amount, (int *)arg);
2391
2392 case TIOCINQ: {
2393 struct sk_buff *skb = skb_peek(&sk->receive_queue);
2394 /* These two are safe on a single CPU system as only
2395 * user tasks fiddle here */
2396 if (skb)
2397 amount = skb->len - sizeof(struct ipxhdr);
2398 return put_user(amount, (int *)arg);
2399 }
2400
2401 case SIOCADDRT:
2402 case SIOCDELRT:
2403 if (!capable(CAP_NET_ADMIN))
2404 return -EPERM;
2405 return ipxrtr_ioctl(cmd, (void *)arg);
2406
2407 case SIOCSIFADDR:
2408 case SIOCAIPXITFCRT:
2409 case SIOCAIPXPRISLT:
2410 if (!capable(CAP_NET_ADMIN))
2411 return -EPERM;
2412
2413 case SIOCGIFADDR:
2414 return ipxitf_ioctl(cmd, (void *)arg);
2415
2416 case SIOCIPXCFGDATA:
2417 return ipxcfg_get_config_data((void *)arg);
2418
2419 case SIOCIPXNCPCONN:
2420 /*
2421 * This socket wants to take care of the NCP connection
2422 * handed to us in arg.
2423 */
2424 if (!capable(CAP_NET_ADMIN))
2425 return -EPERM;
2426 return get_user(sk->protinfo.af_ipx.ipx_ncp_conn,
2427 (const unsigned short *)(arg));
2428
2429 case SIOCGSTAMP: {
2430 int ret = -EINVAL;
2431 if (sk) {
2432 if (!sk->stamp.tv_sec)
2433 return -ENOENT;
2434 ret = -EFAULT;
2435 if (!copy_to_user((void *)arg, &sk->stamp,
2436 sizeof(struct timeval)))
2437 ret = 0;
2438 }
2439
2440 return ret;
2441 }
2442
2443 case SIOCGIFDSTADDR:
2444 case SIOCSIFDSTADDR:
2445 case SIOCGIFBRDADDR:
2446 case SIOCSIFBRDADDR:
2447 case SIOCGIFNETMASK:
2448 case SIOCSIFNETMASK:
2449 return -EINVAL;
2450
2451 default:
2452 return dev_ioctl(cmd,(void *) arg);
2453 }
2454
2455 /*NOT REACHED*/
2456 return 0;
2457 }
2458
2459 /*
2460 * SPX interface support
2461 */
2462
2463 int ipx_register_spx(struct proto_ops **p, struct net_proto_family *spx)
2464 {
2465 if (spx_family_ops)
2466 return -EBUSY;
2467 cli();
2468 MOD_INC_USE_COUNT;
2469 *p = &ipx_dgram_ops;
2470 spx_family_ops = spx;
2471 sti();
2472 return 0;
2473 }
2474
2475 int ipx_unregister_spx(void)
2476 {
2477 spx_family_ops = NULL;
2478 MOD_DEC_USE_COUNT;
2479 return 0;
2480 }
2481
2482 /*
2483 * Socket family declarations
2484 */
2485
2486 static struct net_proto_family ipx_family_ops = {
2487 family: PF_IPX,
2488 create: ipx_create,
2489 };
2490
2491 static struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
2492 family: PF_IPX,
2493
2494 release: ipx_release,
2495 bind: ipx_bind,
2496 connect: ipx_connect,
2497 socketpair: sock_no_socketpair,
2498 accept: sock_no_accept,
2499 getname: ipx_getname,
2500 poll: datagram_poll,
2501 ioctl: ipx_ioctl,
2502 listen: sock_no_listen,
2503 shutdown: sock_no_shutdown, /* FIXME: have to support shutdown */
2504 setsockopt: ipx_setsockopt,
2505 getsockopt: ipx_getsockopt,
2506 sendmsg: ipx_sendmsg,
2507 recvmsg: ipx_recvmsg,
2508 mmap: sock_no_mmap,
2509 sendpage: sock_no_sendpage,
2510 };
2511
2512 #include <linux/smp_lock.h>
2513 SOCKOPS_WRAP(ipx_dgram, PF_IPX);
2514
2515 static struct packet_type ipx_8023_packet_type = {
2516 type: __constant_htons(ETH_P_802_3),
2517 func: ipx_rcv,
2518 data: (void *) 1, /* yap, I understand shared skbs :-) */
2519 };
2520
2521 static struct packet_type ipx_dix_packet_type = {
2522 type: __constant_htons(ETH_P_IPX),
2523 func: ipx_rcv,
2524 data: (void *) 1, /* yap, I understand shared skbs :-) */
2525 };
2526
2527 static struct notifier_block ipx_dev_notifier = {
2528 notifier_call: ipxitf_device_event,
2529 };
2530
2531
2532 extern struct datalink_proto *make_EII_client(void);
2533 extern struct datalink_proto *make_8023_client(void);
2534 extern void destroy_EII_client(struct datalink_proto *);
2535 extern void destroy_8023_client(struct datalink_proto *);
2536
2537 static unsigned char ipx_8022_type = 0xE0;
2538 static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
2539 static char banner[] __initdata =
2540 KERN_INFO "NET4: Linux IPX 0.47 for NET4.0\n"
2541 KERN_INFO "IPX Portions Copyright (c) 1995 Caldera, Inc.\n"
2542 KERN_INFO "IPX Portions Copyright (c) 2000, 2001 Conectiva, Inc.\n";
2543
2544 static int __init ipx_init(void)
2545 {
2546 sock_register(&ipx_family_ops);
2547
2548 pEII_datalink = make_EII_client();
2549 dev_add_pack(&ipx_dix_packet_type);
2550
2551 p8023_datalink = make_8023_client();
2552 dev_add_pack(&ipx_8023_packet_type);
2553
2554 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2555 if (!p8022_datalink)
2556 printk(KERN_CRIT "IPX: Unable to register with 802.2\n");
2557
2558 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2559 if (!pSNAP_datalink)
2560 printk(KERN_CRIT "IPX: Unable to register with SNAP\n");
2561
2562 register_netdevice_notifier(&ipx_dev_notifier);
2563 ipx_register_sysctl();
2564 #ifdef CONFIG_PROC_FS
2565 proc_net_create("ipx", 0, ipx_get_info);
2566 proc_net_create("ipx_interface", 0, ipx_interface_get_info);
2567 proc_net_create("ipx_route", 0, ipx_rt_get_info);
2568 #endif
2569 printk(banner);
2570 return 0;
2571 }
2572
2573 module_init(ipx_init);
2574
2575 /* Higher layers need this info to prep tx pkts */
2576 int ipx_if_offset(unsigned long ipx_net_number)
2577 {
2578 ipx_route *rt = ipxrtr_lookup(ipx_net_number);
2579 int ret = -ENETUNREACH;
2580
2581 if (!rt)
2582 goto out;
2583 ret = rt->ir_intrfc->if_ipx_offset;
2584 ipxrtr_put(rt);
2585 out: return ret;
2586 }
2587
2588 /* Export symbols for higher layers */
2589 EXPORT_SYMBOL(ipxrtr_route_skb);
2590 EXPORT_SYMBOL(ipx_if_offset);
2591 EXPORT_SYMBOL(ipx_remove_socket);
2592 EXPORT_SYMBOL(ipx_register_spx);
2593 EXPORT_SYMBOL(ipx_unregister_spx);
2594
2595 /* Note on MOD_{INC,DEC}_USE_COUNT:
2596 *
2597 * Use counts are incremented/decremented when
2598 * sockets are created/deleted.
2599 *
2600 * Routes are always associated with an interface, and
2601 * allocs/frees will remain properly accounted for by
2602 * their associated interfaces.
2603 *
2604 * Ergo, before the ipx module can be removed, all IPX
2605 * sockets be closed from user space.
2606 */
2607
2608 static void __exit ipx_proto_finito(void)
2609 {
2610 /* no need to worry about having anything on the ipx_interfaces
2611 * list, when a interface is created we increment the module
2612 * usage count, so the module will only be unloaded when there
2613 * are no more interfaces */
2614
2615 proc_net_remove("ipx_route");
2616 proc_net_remove("ipx_interface");
2617 proc_net_remove("ipx");
2618 ipx_unregister_sysctl();
2619
2620 unregister_netdevice_notifier(&ipx_dev_notifier);
2621
2622 unregister_snap_client(ipx_snap_id);
2623 pSNAP_datalink = NULL;
2624
2625 unregister_8022_client(ipx_8022_type);
2626 p8022_datalink = NULL;
2627
2628 dev_remove_pack(&ipx_8023_packet_type);
2629 destroy_8023_client(p8023_datalink);
2630 p8023_datalink = NULL;
2631
2632 dev_remove_pack(&ipx_dix_packet_type);
2633 destroy_EII_client(pEII_datalink);
2634 pEII_datalink = NULL;
2635
2636 sock_unregister(ipx_family_ops.family);
2637 }
2638
2639 module_exit(ipx_proto_finito);
2640