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 * Portions Copyright (c) 2000-2003 Conectiva, Inc. <acme@conectiva.com.br>
19 * Neither Arnaldo Carvalho de Melo nor Conectiva, Inc. admit liability nor
20 * provide warranty for any of this software. This material is provided
21 * "AS-IS" and at no charge.
22 *
23 * Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com>
24 * Neither Greg Page nor Caldera, Inc. admit liability nor provide
25 * warranty for any of this software. This material is provided
26 * "AS-IS" and at no charge.
27 *
28 * See net/ipx/ChangeLog.
29 */
30
31 #include <linux/config.h>
32 #include <linux/errno.h>
33 #include <linux/if_arp.h>
34 #include <linux/if_ether.h>
35 #include <linux/init.h>
36 #include <linux/ipx.h>
37 #include <linux/kernel.h>
38 #include <linux/list.h>
39 #include <linux/module.h>
40 #include <linux/net.h>
41 #include <linux/netdevice.h>
42 #include <linux/uio.h>
43 #include <linux/skbuff.h>
44 #include <linux/socket.h>
45 #include <linux/sockios.h>
46 #include <linux/string.h>
47 #include <linux/tcp.h>
48 #include <linux/types.h>
49 #include <linux/termios.h>
50
51 #include <net/ipx.h>
52 #include <net/p8022.h>
53 #include <net/psnap.h>
54 #include <net/sock.h>
55
56 #include <asm/uaccess.h>
57
58 #ifdef CONFIG_SYSCTL
59 extern void ipx_register_sysctl(void);
60 extern void ipx_unregister_sysctl(void);
61 #else
62 #define ipx_register_sysctl()
63 #define ipx_unregister_sysctl()
64 #endif
65
66 /* Configuration Variables */
67 static unsigned char ipxcfg_max_hops = 16;
68 static char ipxcfg_auto_select_primary;
69 static char ipxcfg_auto_create_interfaces;
70 int sysctl_ipx_pprop_broadcasting = 1;
71
72 /* Global Variables */
73 static struct datalink_proto *p8022_datalink;
74 static struct datalink_proto *pEII_datalink;
75 static struct datalink_proto *p8023_datalink;
76 static struct datalink_proto *pSNAP_datalink;
77
78 static struct proto_ops ipx_dgram_ops;
79
80 LIST_HEAD(ipx_interfaces);
81 DEFINE_SPINLOCK(ipx_interfaces_lock);
82
83 static kmem_cache_t *ipx_sk_slab;
84
85 struct ipx_interface *ipx_primary_net;
86 struct ipx_interface *ipx_internal_net;
87
88 extern int ipxrtr_add_route(__u32 network, struct ipx_interface *intrfc,
89 unsigned char *node);
90 extern void ipxrtr_del_routes(struct ipx_interface *intrfc);
91 extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
92 struct iovec *iov, int len, int noblock);
93 extern int ipxrtr_route_skb(struct sk_buff *skb);
94 extern struct ipx_route *ipxrtr_lookup(__u32 net);
95 extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
96
97 #undef IPX_REFCNT_DEBUG
98 #ifdef IPX_REFCNT_DEBUG
99 atomic_t ipx_sock_nr;
100 #endif
101
102 struct ipx_interface *ipx_interfaces_head(void)
103 {
104 struct ipx_interface *rc = NULL;
105
106 if (!list_empty(&ipx_interfaces))
107 rc = list_entry(ipx_interfaces.next,
108 struct ipx_interface, node);
109 return rc;
110 }
111
112 static void ipxcfg_set_auto_select(char val)
113 {
114 ipxcfg_auto_select_primary = val;
115 if (val && !ipx_primary_net)
116 ipx_primary_net = ipx_interfaces_head();
117 }
118
119 static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
120 {
121 struct ipx_config_data vals;
122
123 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
124 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
125
126 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
127 }
128
129 /*
130 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
131 * handler using this technique. They can be added although we do not
132 * use this facility.
133 */
134
135 static void ipx_remove_socket(struct sock *sk)
136 {
137 /* Determine interface with which socket is associated */
138 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
139
140 if (!intrfc)
141 goto out;
142
143 ipxitf_hold(intrfc);
144 spin_lock_bh(&intrfc->if_sklist_lock);
145 sk_del_node_init(sk);
146 spin_unlock_bh(&intrfc->if_sklist_lock);
147 ipxitf_put(intrfc);
148 out:
149 return;
150 }
151
152 static void ipx_destroy_socket(struct sock *sk)
153 {
154 ipx_remove_socket(sk);
155 skb_queue_purge(&sk->sk_receive_queue);
156 #ifdef IPX_REFCNT_DEBUG
157 atomic_dec(&ipx_sock_nr);
158 printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk,
159 atomic_read(&ipx_sock_nr));
160 if (atomic_read(&sk->sk_refcnt) != 1)
161 printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n",
162 sk, atomic_read(&sk->sk_refcnt));
163 #endif
164 sock_put(sk);
165 }
166
167 /*
168 * The following code is used to support IPX Interfaces (IPXITF). An
169 * IPX interface is defined by a physical device and a frame type.
170 */
171
172 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
173
174 static void ipxitf_clear_primary_net(void)
175 {
176 ipx_primary_net = NULL;
177 if (ipxcfg_auto_select_primary)
178 ipx_primary_net = ipx_interfaces_head();
179 }
180
181 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
182 unsigned short datalink)
183 {
184 struct ipx_interface *i;
185
186 list_for_each_entry(i, &ipx_interfaces, node)
187 if (i->if_dev == dev && i->if_dlink_type == datalink)
188 goto out;
189 i = NULL;
190 out:
191 return i;
192 }
193
194 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
195 unsigned short datalink)
196 {
197 struct ipx_interface *i;
198
199 spin_lock_bh(&ipx_interfaces_lock);
200 i = __ipxitf_find_using_phys(dev, datalink);
201 if (i)
202 ipxitf_hold(i);
203 spin_unlock_bh(&ipx_interfaces_lock);
204 return i;
205 }
206
207 struct ipx_interface *ipxitf_find_using_net(__u32 net)
208 {
209 struct ipx_interface *i;
210
211 spin_lock_bh(&ipx_interfaces_lock);
212 if (net) {
213 list_for_each_entry(i, &ipx_interfaces, node)
214 if (i->if_netnum == net)
215 goto hold;
216 i = NULL;
217 goto unlock;
218 }
219
220 i = ipx_primary_net;
221 if (i)
222 hold:
223 ipxitf_hold(i);
224 unlock:
225 spin_unlock_bh(&ipx_interfaces_lock);
226 return i;
227 }
228
229 /* Sockets are bound to a particular IPX interface. */
230 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
231 {
232 ipxitf_hold(intrfc);
233 spin_lock_bh(&intrfc->if_sklist_lock);
234 ipx_sk(sk)->intrfc = intrfc;
235 sk_add_node(sk, &intrfc->if_sklist);
236 spin_unlock_bh(&intrfc->if_sklist_lock);
237 ipxitf_put(intrfc);
238 }
239
240 /* caller must hold intrfc->if_sklist_lock */
241 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
242 unsigned short port)
243 {
244 struct sock *s;
245 struct hlist_node *node;
246
247 sk_for_each(s, node, &intrfc->if_sklist)
248 if (ipx_sk(s)->port == port)
249 goto found;
250 s = NULL;
251 found:
252 return s;
253 }
254
255 /* caller must hold a reference to intrfc */
256 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
257 unsigned short port)
258 {
259 struct sock *s;
260
261 spin_lock_bh(&intrfc->if_sklist_lock);
262 s = __ipxitf_find_socket(intrfc, port);
263 if (s)
264 sock_hold(s);
265 spin_unlock_bh(&intrfc->if_sklist_lock);
266
267 return s;
268 }
269
270 #ifdef CONFIG_IPX_INTERN
271 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
272 unsigned char *ipx_node,
273 unsigned short port)
274 {
275 struct sock *s;
276 struct hlist_node *node;
277
278 ipxitf_hold(intrfc);
279 spin_lock_bh(&intrfc->if_sklist_lock);
280
281 sk_for_each(s, node, &intrfc->if_sklist) {
282 struct ipx_sock *ipxs = ipx_sk(s);
283
284 if (ipxs->port == port &&
285 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
286 goto found;
287 }
288 s = NULL;
289 found:
290 spin_unlock_bh(&intrfc->if_sklist_lock);
291 ipxitf_put(intrfc);
292 return s;
293 }
294 #endif
295
296 static void __ipxitf_down(struct ipx_interface *intrfc)
297 {
298 struct sock *s;
299 struct hlist_node *node, *t;
300
301 /* Delete all routes associated with this interface */
302 ipxrtr_del_routes(intrfc);
303
304 spin_lock_bh(&intrfc->if_sklist_lock);
305 /* error sockets */
306 sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
307 struct ipx_sock *ipxs = ipx_sk(s);
308
309 s->sk_err = ENOLINK;
310 s->sk_error_report(s);
311 ipxs->intrfc = NULL;
312 ipxs->port = 0;
313 s->sk_zapped = 1; /* Indicates it is no longer bound */
314 sk_del_node_init(s);
315 }
316 INIT_HLIST_HEAD(&intrfc->if_sklist);
317 spin_unlock_bh(&intrfc->if_sklist_lock);
318
319 /* remove this interface from list */
320 list_del(&intrfc->node);
321
322 /* remove this interface from *special* networks */
323 if (intrfc == ipx_primary_net)
324 ipxitf_clear_primary_net();
325 if (intrfc == ipx_internal_net)
326 ipx_internal_net = NULL;
327
328 if (intrfc->if_dev)
329 dev_put(intrfc->if_dev);
330 kfree(intrfc);
331 }
332
333 void ipxitf_down(struct ipx_interface *intrfc)
334 {
335 spin_lock_bh(&ipx_interfaces_lock);
336 __ipxitf_down(intrfc);
337 spin_unlock_bh(&ipx_interfaces_lock);
338 }
339
340 static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
341 {
342 if (atomic_dec_and_test(&intrfc->refcnt))
343 __ipxitf_down(intrfc);
344 }
345
346 static int ipxitf_device_event(struct notifier_block *notifier,
347 unsigned long event, void *ptr)
348 {
349 struct net_device *dev = ptr;
350 struct ipx_interface *i, *tmp;
351
352 if (event != NETDEV_DOWN && event != NETDEV_UP)
353 goto out;
354
355 spin_lock_bh(&ipx_interfaces_lock);
356 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
357 if (i->if_dev == dev) {
358 if (event == NETDEV_UP)
359 ipxitf_hold(i);
360 else
361 __ipxitf_put(i);
362 }
363 spin_unlock_bh(&ipx_interfaces_lock);
364 out:
365 return NOTIFY_DONE;
366 }
367
368
369 static __exit void ipxitf_cleanup(void)
370 {
371 struct ipx_interface *i, *tmp;
372
373 spin_lock_bh(&ipx_interfaces_lock);
374 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
375 __ipxitf_put(i);
376 spin_unlock_bh(&ipx_interfaces_lock);
377 }
378
379 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
380 {
381 if (sock_queue_rcv_skb(sock, skb) < 0)
382 kfree_skb(skb);
383 }
384
385 /*
386 * On input skb->sk is NULL. Nobody is charged for the memory.
387 */
388
389 /* caller must hold a reference to intrfc */
390
391 #ifdef CONFIG_IPX_INTERN
392 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
393 struct sk_buff *skb, int copy)
394 {
395 struct ipxhdr *ipx = ipx_hdr(skb);
396 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
397 IPX_NODE_LEN);
398 struct sock *s;
399 struct hlist_node *node;
400 int rc;
401
402 spin_lock_bh(&intrfc->if_sklist_lock);
403
404 sk_for_each(s, node, &intrfc->if_sklist) {
405 struct ipx_sock *ipxs = ipx_sk(s);
406
407 if (ipxs->port == ipx->ipx_dest.sock &&
408 (is_broadcast || !memcmp(ipx->ipx_dest.node,
409 ipxs->node, IPX_NODE_LEN))) {
410 /* We found a socket to which to send */
411 struct sk_buff *skb1;
412
413 if (copy) {
414 skb1 = skb_clone(skb, GFP_ATOMIC);
415 rc = -ENOMEM;
416 if (!skb1)
417 goto out;
418 } else {
419 skb1 = skb;
420 copy = 1; /* skb may only be used once */
421 }
422 ipxitf_def_skb_handler(s, skb1);
423
424 /* On an external interface, one socket can listen */
425 if (intrfc != ipx_internal_net)
426 break;
427 }
428 }
429
430 /* skb was solely for us, and we did not make a copy, so free it. */
431 if (!copy)
432 kfree_skb(skb);
433
434 rc = 0;
435 out:
436 spin_unlock_bh(&intrfc->if_sklist_lock);
437 return rc;
438 }
439 #else
440 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
441 struct ipxhdr *ipx)
442 {
443 /* The packet's target is a NCP connection handler. We want to hand it
444 * to the correct socket directly within the kernel, so that the
445 * mars_nwe packet distribution process does not have to do it. Here we
446 * only care about NCP and BURST packets.
447 *
448 * You might call this a hack, but believe me, you do not want a
449 * complete NCP layer in the kernel, and this is VERY fast as well. */
450 struct sock *sk = NULL;
451 int connection = 0;
452 u8 *ncphdr = (u8 *)(ipx + 1);
453
454 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
455 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
456 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
457 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
458
459 if (connection) {
460 struct hlist_node *node;
461 /* Now we have to look for a special NCP connection handling
462 * socket. Only these sockets have ipx_ncp_conn != 0, set by
463 * SIOCIPXNCPCONN. */
464 spin_lock_bh(&intrfc->if_sklist_lock);
465 sk_for_each(sk, node, &intrfc->if_sklist)
466 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
467 sock_hold(sk);
468 goto found;
469 }
470 sk = NULL;
471 found:
472 spin_unlock_bh(&intrfc->if_sklist_lock);
473 }
474 return sk;
475 }
476
477 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
478 struct sk_buff *skb, int copy)
479 {
480 struct ipxhdr *ipx = ipx_hdr(skb);
481 struct sock *sock1 = NULL, *sock2 = NULL;
482 struct sk_buff *skb1 = NULL, *skb2 = NULL;
483 int rc;
484
485 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
486 sock1 = ncp_connection_hack(intrfc, ipx);
487 if (!sock1)
488 /* No special socket found, forward the packet the normal way */
489 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
490
491 /*
492 * We need to check if there is a primary net and if
493 * this is addressed to one of the *SPECIAL* sockets because
494 * these need to be propagated to the primary net.
495 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
496 * 0x456(Diagnostic).
497 */
498
499 if (ipx_primary_net && intrfc != ipx_primary_net) {
500 const int dsock = ntohs(ipx->ipx_dest.sock);
501
502 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
503 /* The appropriate thing to do here is to dup the
504 * packet and route to the primary net interface via
505 * ipxitf_send; however, we'll cheat and just demux it
506 * here. */
507 sock2 = ipxitf_find_socket(ipx_primary_net,
508 ipx->ipx_dest.sock);
509 }
510
511 /*
512 * If there is nothing to do return. The kfree will cancel any charging.
513 */
514 rc = 0;
515 if (!sock1 && !sock2) {
516 if (!copy)
517 kfree_skb(skb);
518 goto out;
519 }
520
521 /*
522 * This next segment of code is a little awkward, but it sets it up
523 * so that the appropriate number of copies of the SKB are made and
524 * that skb1 and skb2 point to it (them) so that it (they) can be
525 * demuxed to sock1 and/or sock2. If we are unable to make enough
526 * copies, we do as much as is possible.
527 */
528
529 if (copy)
530 skb1 = skb_clone(skb, GFP_ATOMIC);
531 else
532 skb1 = skb;
533
534 rc = -ENOMEM;
535 if (!skb1)
536 goto out_put;
537
538 /* Do we need 2 SKBs? */
539 if (sock1 && sock2)
540 skb2 = skb_clone(skb1, GFP_ATOMIC);
541 else
542 skb2 = skb1;
543
544 if (sock1)
545 ipxitf_def_skb_handler(sock1, skb1);
546
547 if (!skb2)
548 goto out_put;
549
550 if (sock2)
551 ipxitf_def_skb_handler(sock2, skb2);
552
553 rc = 0;
554 out_put:
555 if (sock1)
556 sock_put(sock1);
557 if (sock2)
558 sock_put(sock2);
559 out:
560 return rc;
561 }
562 #endif /* CONFIG_IPX_INTERN */
563
564 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
565 struct sk_buff *skb)
566 {
567 struct sk_buff *skb2;
568 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
569 int out_offset = intrfc->if_ipx_offset;
570 int len;
571
572 /* Hopefully, most cases */
573 if (in_offset >= out_offset)
574 return skb;
575
576 /* Need new SKB */
577 len = skb->len + out_offset;
578 skb2 = alloc_skb(len, GFP_ATOMIC);
579 if (skb2) {
580 skb_reserve(skb2, out_offset);
581 skb2->nh.raw = skb2->h.raw = skb_put(skb2, skb->len);
582 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
583 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
584 }
585 kfree_skb(skb);
586 return skb2;
587 }
588
589 /* caller must hold a reference to intrfc and the skb has to be unshared */
590 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
591 {
592 struct ipxhdr *ipx = ipx_hdr(skb);
593 struct net_device *dev = intrfc->if_dev;
594 struct datalink_proto *dl = intrfc->if_dlink;
595 char dest_node[IPX_NODE_LEN];
596 int send_to_wire = 1;
597 int addr_len;
598
599 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
600 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
601 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
602
603 /* see if we need to include the netnum in the route list */
604 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
605 u32 *last_hop = (u32 *)(((u8 *) skb->data) +
606 sizeof(struct ipxhdr) +
607 IPX_SKB_CB(skb)->last_hop.index *
608 sizeof(u32));
609 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
610 IPX_SKB_CB(skb)->last_hop.index = -1;
611 }
612
613 /*
614 * We need to know how many skbuffs it will take to send out this
615 * packet to avoid unnecessary copies.
616 */
617
618 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
619 send_to_wire = 0; /* No non looped */
620
621 /*
622 * See if this should be demuxed to sockets on this interface
623 *
624 * We want to ensure the original was eaten or that we only use
625 * up clones.
626 */
627
628 if (ipx->ipx_dest.net == intrfc->if_netnum) {
629 /*
630 * To our own node, loop and free the original.
631 * The internal net will receive on all node address.
632 */
633 if (intrfc == ipx_internal_net ||
634 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
635 /* Don't charge sender */
636 skb_orphan(skb);
637
638 /* Will charge receiver */
639 return ipxitf_demux_socket(intrfc, skb, 0);
640 }
641
642 /* Broadcast, loop and possibly keep to send on. */
643 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
644 if (!send_to_wire)
645 skb_orphan(skb);
646 ipxitf_demux_socket(intrfc, skb, send_to_wire);
647 if (!send_to_wire)
648 goto out;
649 }
650 }
651
652 /*
653 * If the originating net is not equal to our net; this is routed
654 * We are still charging the sender. Which is right - the driver
655 * free will handle this fairly.
656 */
657 if (ipx->ipx_source.net != intrfc->if_netnum) {
658 /*
659 * Unshare the buffer before modifying the count in
660 * case it's a flood or tcpdump
661 */
662 skb = skb_unshare(skb, GFP_ATOMIC);
663 if (!skb)
664 goto out;
665 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
666 send_to_wire = 0;
667 }
668
669 if (!send_to_wire) {
670 kfree_skb(skb);
671 goto out;
672 }
673
674 /* Determine the appropriate hardware address */
675 addr_len = dev->addr_len;
676 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
677 memcpy(dest_node, dev->broadcast, addr_len);
678 else
679 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
680
681 /* Make any compensation for differing physical/data link size */
682 skb = ipxitf_adjust_skbuff(intrfc, skb);
683 if (!skb)
684 goto out;
685
686 /* set up data link and physical headers */
687 skb->dev = dev;
688 skb->protocol = htons(ETH_P_IPX);
689
690 /* Send it out */
691 dl->request(dl, skb, dest_node);
692 out:
693 return 0;
694 }
695
696 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
697 {
698 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
699 }
700
701 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
702 struct sk_buff *skb);
703 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
704
705 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
706 {
707 struct ipxhdr *ipx = ipx_hdr(skb);
708 int rc = 0;
709
710 ipxitf_hold(intrfc);
711
712 /* See if we should update our network number */
713 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
714 ipxitf_discover_netnum(intrfc, skb);
715
716 IPX_SKB_CB(skb)->last_hop.index = -1;
717 if (ipx->ipx_type == IPX_TYPE_PPROP) {
718 rc = ipxitf_pprop(intrfc, skb);
719 if (rc)
720 goto out_free_skb;
721 }
722
723 /* local processing follows */
724 if (!IPX_SKB_CB(skb)->ipx_dest_net)
725 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
726 if (!IPX_SKB_CB(skb)->ipx_source_net)
727 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
728
729 /* it doesn't make sense to route a pprop packet, there's no meaning
730 * in the ipx_dest_net for such packets */
731 if (ipx->ipx_type != IPX_TYPE_PPROP &&
732 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
733 /* We only route point-to-point packets. */
734 if (skb->pkt_type == PACKET_HOST) {
735 skb = skb_unshare(skb, GFP_ATOMIC);
736 if (skb)
737 rc = ipxrtr_route_skb(skb);
738 goto out_intrfc;
739 }
740
741 goto out_free_skb;
742 }
743
744 /* see if we should keep it */
745 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
746 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
747 rc = ipxitf_demux_socket(intrfc, skb, 0);
748 goto out_intrfc;
749 }
750
751 /* we couldn't pawn it off so unload it */
752 out_free_skb:
753 kfree_skb(skb);
754 out_intrfc:
755 ipxitf_put(intrfc);
756 return rc;
757 }
758
759 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
760 struct sk_buff *skb)
761 {
762 const struct ipx_cb *cb = IPX_SKB_CB(skb);
763
764 /* see if this is an intra packet: source_net == dest_net */
765 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
766 struct ipx_interface *i =
767 ipxitf_find_using_net(cb->ipx_source_net);
768 /* NB: NetWare servers lie about their hop count so we
769 * dropped the test based on it. This is the best way
770 * to determine this is a 0 hop count packet. */
771 if (!i) {
772 intrfc->if_netnum = cb->ipx_source_net;
773 ipxitf_add_local_route(intrfc);
774 } else {
775 printk(KERN_WARNING "IPX: Network number collision "
776 "%lx\n %s %s and %s %s\n",
777 (unsigned long) htonl(cb->ipx_source_net),
778 ipx_device_name(i),
779 ipx_frame_name(i->if_dlink_type),
780 ipx_device_name(intrfc),
781 ipx_frame_name(intrfc->if_dlink_type));
782 ipxitf_put(i);
783 }
784 }
785 }
786
787 /**
788 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
789 * NetBIOS broadcasts
790 * @intrfc: IPX interface receiving this packet
791 * @skb: Received packet
792 *
793 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
794 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
795 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
796 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
797 * RIP and SAP Router Specification", Part Number 107-000029-001.
798 *
799 * If it is valid, check if we have pprop broadcasting enabled by the user,
800 * if not, just return zero for local processing.
801 *
802 * If it is enabled check the packet and don't broadcast it if we have already
803 * seen this packet.
804 *
805 * Broadcast: send it to the interfaces that aren't on the packet visited nets
806 * array, just after the IPX header.
807 *
808 * Returns -EINVAL for invalid packets, so that the calling function drops
809 * the packet without local processing. 0 if packet is to be locally processed.
810 */
811 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
812 {
813 struct ipxhdr *ipx = ipx_hdr(skb);
814 int i, rc = -EINVAL;
815 struct ipx_interface *ifcs;
816 char *c;
817 u32 *l;
818
819 /* Illegal packet - too many hops or too short */
820 /* We decide to throw it away: no broadcasting, no local processing.
821 * NetBIOS unaware implementations route them as normal packets -
822 * tctrl <= 15, any data payload... */
823 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
824 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
825 IPX_MAX_PPROP_HOPS * sizeof(u32))
826 goto out;
827 /* are we broadcasting this damn thing? */
828 rc = 0;
829 if (!sysctl_ipx_pprop_broadcasting)
830 goto out;
831 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
832 * process it locally. All previous hops broadcasted it, and process it
833 * locally. */
834 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
835 goto out;
836
837 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
838 l = (u32 *) c;
839
840 /* Don't broadcast packet if already seen this net */
841 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
842 if (*l++ == intrfc->if_netnum)
843 goto out;
844
845 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
846 * position where we will insert recvd netnum into list, later on,
847 * in ipxitf_send */
848 IPX_SKB_CB(skb)->last_hop.index = i;
849 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
850 /* xmit on all other interfaces... */
851 spin_lock_bh(&ipx_interfaces_lock);
852 list_for_each_entry(ifcs, &ipx_interfaces, node) {
853 /* Except unconfigured interfaces */
854 if (!ifcs->if_netnum)
855 continue;
856
857 /* That aren't in the list */
858 if (ifcs == intrfc)
859 continue;
860 l = (__u32 *) c;
861 /* don't consider the last entry in the packet list,
862 * it is our netnum, and it is not there yet */
863 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
864 if (ifcs->if_netnum == *l++)
865 break;
866 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
867 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
868
869 if (s) {
870 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
871 ipxrtr_route_skb(s);
872 }
873 }
874 }
875 spin_unlock_bh(&ipx_interfaces_lock);
876 out:
877 return rc;
878 }
879
880 static void ipxitf_insert(struct ipx_interface *intrfc)
881 {
882 spin_lock_bh(&ipx_interfaces_lock);
883 list_add_tail(&intrfc->node, &ipx_interfaces);
884 spin_unlock_bh(&ipx_interfaces_lock);
885
886 if (ipxcfg_auto_select_primary && !ipx_primary_net)
887 ipx_primary_net = intrfc;
888 }
889
890 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __u32 netnum,
891 unsigned short dlink_type,
892 struct datalink_proto *dlink,
893 unsigned char internal,
894 int ipx_offset)
895 {
896 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
897
898 if (intrfc) {
899 intrfc->if_dev = dev;
900 intrfc->if_netnum = netnum;
901 intrfc->if_dlink_type = dlink_type;
902 intrfc->if_dlink = dlink;
903 intrfc->if_internal = internal;
904 intrfc->if_ipx_offset = ipx_offset;
905 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
906 INIT_HLIST_HEAD(&intrfc->if_sklist);
907 atomic_set(&intrfc->refcnt, 1);
908 spin_lock_init(&intrfc->if_sklist_lock);
909 }
910
911 return intrfc;
912 }
913
914 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
915 {
916 struct ipx_interface *intrfc;
917 int rc = -EEXIST;
918
919 /* Only one primary network allowed */
920 if (ipx_primary_net)
921 goto out;
922
923 /* Must have a valid network number */
924 rc = -EADDRNOTAVAIL;
925 if (!idef->ipx_network)
926 goto out;
927 intrfc = ipxitf_find_using_net(idef->ipx_network);
928 rc = -EADDRINUSE;
929 if (intrfc) {
930 ipxitf_put(intrfc);
931 goto out;
932 }
933 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
934 rc = -EAGAIN;
935 if (!intrfc)
936 goto out;
937 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
938 ipx_internal_net = ipx_primary_net = intrfc;
939 ipxitf_hold(intrfc);
940 ipxitf_insert(intrfc);
941
942 rc = ipxitf_add_local_route(intrfc);
943 ipxitf_put(intrfc);
944 out:
945 return rc;
946 }
947
948 static int ipx_map_frame_type(unsigned char type)
949 {
950 int rc = 0;
951
952 switch (type) {
953 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
954 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
955 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
956 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
957 }
958
959 return rc;
960 }
961
962 static int ipxitf_create(struct ipx_interface_definition *idef)
963 {
964 struct net_device *dev;
965 unsigned short dlink_type = 0;
966 struct datalink_proto *datalink = NULL;
967 struct ipx_interface *intrfc;
968 int rc;
969
970 if (idef->ipx_special == IPX_INTERNAL) {
971 rc = ipxitf_create_internal(idef);
972 goto out;
973 }
974
975 rc = -EEXIST;
976 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
977 goto out;
978
979 intrfc = ipxitf_find_using_net(idef->ipx_network);
980 rc = -EADDRINUSE;
981 if (idef->ipx_network && intrfc) {
982 ipxitf_put(intrfc);
983 goto out;
984 }
985
986 if (intrfc)
987 ipxitf_put(intrfc);
988
989 dev = dev_get_by_name(idef->ipx_device);
990 rc = -ENODEV;
991 if (!dev)
992 goto out;
993
994 switch (idef->ipx_dlink_type) {
995 case IPX_FRAME_TR_8022:
996 printk(KERN_WARNING "IPX frame type 802.2TR is "
997 "obsolete Use 802.2 instead.\n");
998 /* fall through */
999 case IPX_FRAME_8022:
1000 dlink_type = htons(ETH_P_802_2);
1001 datalink = p8022_datalink;
1002 break;
1003 case IPX_FRAME_ETHERII:
1004 if (dev->type != ARPHRD_IEEE802) {
1005 dlink_type = htons(ETH_P_IPX);
1006 datalink = pEII_datalink;
1007 break;
1008 } else
1009 printk(KERN_WARNING "IPX frame type EtherII over "
1010 "token-ring is obsolete. Use SNAP "
1011 "instead.\n");
1012 /* fall through */
1013 case IPX_FRAME_SNAP:
1014 dlink_type = htons(ETH_P_SNAP);
1015 datalink = pSNAP_datalink;
1016 break;
1017 case IPX_FRAME_8023:
1018 dlink_type = htons(ETH_P_802_3);
1019 datalink = p8023_datalink;
1020 break;
1021 case IPX_FRAME_NONE:
1022 default:
1023 rc = -EPROTONOSUPPORT;
1024 goto out_dev;
1025 }
1026
1027 rc = -ENETDOWN;
1028 if (!(dev->flags & IFF_UP))
1029 goto out_dev;
1030
1031 /* Check addresses are suitable */
1032 rc = -EINVAL;
1033 if (dev->addr_len > IPX_NODE_LEN)
1034 goto out_dev;
1035
1036 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1037 if (!intrfc) {
1038 /* Ok now create */
1039 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1040 datalink, 0, dev->hard_header_len +
1041 datalink->header_length);
1042 rc = -EAGAIN;
1043 if (!intrfc)
1044 goto out_dev;
1045 /* Setup primary if necessary */
1046 if (idef->ipx_special == IPX_PRIMARY)
1047 ipx_primary_net = intrfc;
1048 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1049 IPX_NODE_LEN)) {
1050 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1051 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1052 dev->dev_addr, dev->addr_len);
1053 } else
1054 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1055 ipxitf_hold(intrfc);
1056 ipxitf_insert(intrfc);
1057 }
1058
1059
1060 /* If the network number is known, add a route */
1061 rc = 0;
1062 if (!intrfc->if_netnum)
1063 goto out_intrfc;
1064
1065 rc = ipxitf_add_local_route(intrfc);
1066 out_intrfc:
1067 ipxitf_put(intrfc);
1068 goto out;
1069 out_dev:
1070 dev_put(dev);
1071 out:
1072 return rc;
1073 }
1074
1075 static int ipxitf_delete(struct ipx_interface_definition *idef)
1076 {
1077 struct net_device *dev = NULL;
1078 unsigned short dlink_type = 0;
1079 struct ipx_interface *intrfc;
1080 int rc = 0;
1081
1082 spin_lock_bh(&ipx_interfaces_lock);
1083 if (idef->ipx_special == IPX_INTERNAL) {
1084 if (ipx_internal_net) {
1085 __ipxitf_put(ipx_internal_net);
1086 goto out;
1087 }
1088 rc = -ENOENT;
1089 goto out;
1090 }
1091
1092 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1093 rc = -EPROTONOSUPPORT;
1094 if (!dlink_type)
1095 goto out;
1096
1097 dev = __dev_get_by_name(idef->ipx_device);
1098 rc = -ENODEV;
1099 if (!dev)
1100 goto out;
1101
1102 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1103 rc = -EINVAL;
1104 if (!intrfc)
1105 goto out;
1106 __ipxitf_put(intrfc);
1107
1108 rc = 0;
1109 out:
1110 spin_unlock_bh(&ipx_interfaces_lock);
1111 return rc;
1112 }
1113
1114 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1115 unsigned short dlink_type)
1116 {
1117 struct ipx_interface *intrfc = NULL;
1118 struct datalink_proto *datalink;
1119
1120 if (!dev)
1121 goto out;
1122
1123 /* Check addresses are suitable */
1124 if (dev->addr_len > IPX_NODE_LEN)
1125 goto out;
1126
1127 switch (htons(dlink_type)) {
1128 case ETH_P_IPX: datalink = pEII_datalink; break;
1129 case ETH_P_802_2: datalink = p8022_datalink; break;
1130 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1131 case ETH_P_802_3: datalink = p8023_datalink; break;
1132 default: goto out;
1133 }
1134
1135 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1136 dev->hard_header_len + datalink->header_length);
1137
1138 if (intrfc) {
1139 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1140 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1141 dev->dev_addr, dev->addr_len);
1142 spin_lock_init(&intrfc->if_sklist_lock);
1143 atomic_set(&intrfc->refcnt, 1);
1144 ipxitf_insert(intrfc);
1145 dev_hold(dev);
1146 }
1147
1148 out:
1149 return intrfc;
1150 }
1151
1152 static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1153 {
1154 int rc = -EINVAL;
1155 struct ifreq ifr;
1156 int val;
1157
1158 switch (cmd) {
1159 case SIOCSIFADDR: {
1160 struct sockaddr_ipx *sipx;
1161 struct ipx_interface_definition f;
1162
1163 rc = -EFAULT;
1164 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1165 break;
1166 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1167 rc = -EINVAL;
1168 if (sipx->sipx_family != AF_IPX)
1169 break;
1170 f.ipx_network = sipx->sipx_network;
1171 memcpy(f.ipx_device, ifr.ifr_name,
1172 sizeof(f.ipx_device));
1173 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1174 f.ipx_dlink_type = sipx->sipx_type;
1175 f.ipx_special = sipx->sipx_special;
1176
1177 if (sipx->sipx_action == IPX_DLTITF)
1178 rc = ipxitf_delete(&f);
1179 else
1180 rc = ipxitf_create(&f);
1181 break;
1182 }
1183 case SIOCGIFADDR: {
1184 struct sockaddr_ipx *sipx;
1185 struct ipx_interface *ipxif;
1186 struct net_device *dev;
1187
1188 rc = -EFAULT;
1189 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1190 break;
1191 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1192 dev = __dev_get_by_name(ifr.ifr_name);
1193 rc = -ENODEV;
1194 if (!dev)
1195 break;
1196 ipxif = ipxitf_find_using_phys(dev,
1197 ipx_map_frame_type(sipx->sipx_type));
1198 rc = -EADDRNOTAVAIL;
1199 if (!ipxif)
1200 break;
1201
1202 sipx->sipx_family = AF_IPX;
1203 sipx->sipx_network = ipxif->if_netnum;
1204 memcpy(sipx->sipx_node, ipxif->if_node,
1205 sizeof(sipx->sipx_node));
1206 rc = -EFAULT;
1207 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1208 break;
1209 ipxitf_put(ipxif);
1210 rc = 0;
1211 break;
1212 }
1213 case SIOCAIPXITFCRT:
1214 rc = -EFAULT;
1215 if (get_user(val, (unsigned char __user *) arg))
1216 break;
1217 rc = 0;
1218 ipxcfg_auto_create_interfaces = val;
1219 break;
1220 case SIOCAIPXPRISLT:
1221 rc = -EFAULT;
1222 if (get_user(val, (unsigned char __user *) arg))
1223 break;
1224 rc = 0;
1225 ipxcfg_set_auto_select(val);
1226 break;
1227 }
1228
1229 return rc;
1230 }
1231
1232 /*
1233 * Checksum routine for IPX
1234 */
1235
1236 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1237 /* This functions should *not* mess with packet contents */
1238
1239 __u16 ipx_cksum(struct ipxhdr *packet, int length)
1240 {
1241 /*
1242 * NOTE: sum is a net byte order quantity, which optimizes the
1243 * loop. This only works on big and little endian machines. (I
1244 * don't know of a machine that isn't.)
1245 */
1246 /* start at ipx_dest - We skip the checksum field and start with
1247 * ipx_type before the loop, not considering ipx_tctrl in the calc */
1248 __u16 *p = (__u16 *)&packet->ipx_dest;
1249 __u32 i = (length >> 1) - 1; /* Number of complete words */
1250 __u32 sum = packet->ipx_type << sizeof(packet->ipx_tctrl);
1251
1252 /* Loop through all complete words except the checksum field,
1253 * ipx_type (accounted above) and ipx_tctrl (not used in the cksum) */
1254 while (--i)
1255 sum += *p++;
1256
1257 /* Add on the last part word if it exists */
1258 if (packet->ipx_pktsize & htons(1))
1259 sum += ntohs(0xff00) & *p;
1260
1261 /* Do final fixup */
1262 sum = (sum & 0xffff) + (sum >> 16);
1263
1264 /* It's a pity there's no concept of carry in C */
1265 if (sum >= 0x10000)
1266 sum++;
1267
1268 return ~sum;
1269 }
1270
1271 const char *ipx_frame_name(unsigned short frame)
1272 {
1273 char* rc = "None";
1274
1275 switch (ntohs(frame)) {
1276 case ETH_P_IPX: rc = "EtherII"; break;
1277 case ETH_P_802_2: rc = "802.2"; break;
1278 case ETH_P_SNAP: rc = "SNAP"; break;
1279 case ETH_P_802_3: rc = "802.3"; break;
1280 case ETH_P_TR_802_2: rc = "802.2TR"; break;
1281 }
1282
1283 return rc;
1284 }
1285
1286 const char *ipx_device_name(struct ipx_interface *intrfc)
1287 {
1288 return intrfc->if_internal ? "Internal" :
1289 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1290 }
1291
1292 /* Handling for system calls applied via the various interfaces to an IPX
1293 * socket object. */
1294
1295 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1296 char __user *optval, int optlen)
1297 {
1298 struct sock *sk = sock->sk;
1299 int opt;
1300 int rc = -EINVAL;
1301
1302 if (optlen != sizeof(int))
1303 goto out;
1304
1305 rc = -EFAULT;
1306 if (get_user(opt, (unsigned int __user *)optval))
1307 goto out;
1308
1309 rc = -ENOPROTOOPT;
1310 if (!(level == SOL_IPX && optname == IPX_TYPE))
1311 goto out;
1312
1313 ipx_sk(sk)->type = opt;
1314 rc = 0;
1315 out:
1316 return rc;
1317 }
1318
1319 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1320 char __user *optval, int __user *optlen)
1321 {
1322 struct sock *sk = sock->sk;
1323 int val = 0;
1324 int len;
1325 int rc = -ENOPROTOOPT;
1326
1327 if (!(level == SOL_IPX && optname == IPX_TYPE))
1328 goto out;
1329
1330 val = ipx_sk(sk)->type;
1331
1332 rc = -EFAULT;
1333 if (get_user(len, optlen))
1334 goto out;
1335
1336 len = min_t(unsigned int, len, sizeof(int));
1337 rc = -EINVAL;
1338 if(len < 0)
1339 goto out;
1340
1341 rc = -EFAULT;
1342 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1343 goto out;
1344
1345 rc = 0;
1346 out:
1347 return rc;
1348 }
1349
1350 static int ipx_create(struct socket *sock, int protocol)
1351 {
1352 int rc = -ESOCKTNOSUPPORT;
1353 struct sock *sk;
1354
1355 /*
1356 * SPX support is not anymore in the kernel sources. If you want to
1357 * ressurrect it, completing it and making it understand shared skbs,
1358 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1359 * tree.
1360 */
1361 if (sock->type != SOCK_DGRAM)
1362 goto out;
1363
1364 sk = sk_alloc(PF_IPX, GFP_KERNEL, sizeof(struct ipx_sock), ipx_sk_slab);
1365 rc = -ENOMEM;
1366 if (!sk)
1367 goto out;
1368 #ifdef IPX_REFCNT_DEBUG
1369 atomic_inc(&ipx_sock_nr);
1370 printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk,
1371 atomic_read(&ipx_sock_nr));
1372 #endif
1373 sock_init_data(sock, sk);
1374 sk_set_owner(sk, THIS_MODULE);
1375 sk->sk_no_check = 1; /* Checksum off by default */
1376 sock->ops = &ipx_dgram_ops;
1377 rc = 0;
1378 out:
1379 return rc;
1380 }
1381
1382 static int ipx_release(struct socket *sock)
1383 {
1384 struct sock *sk = sock->sk;
1385
1386 if (!sk)
1387 goto out;
1388
1389 if (!sock_flag(sk, SOCK_DEAD))
1390 sk->sk_state_change(sk);
1391
1392 sock_set_flag(sk, SOCK_DEAD);
1393 sock->sk = NULL;
1394 ipx_destroy_socket(sk);
1395 out:
1396 return 0;
1397 }
1398
1399 /* caller must hold a reference to intrfc */
1400
1401 static unsigned short ipx_first_free_socketnum(struct ipx_interface *intrfc)
1402 {
1403 unsigned short socketNum = intrfc->if_sknum;
1404
1405 spin_lock_bh(&intrfc->if_sklist_lock);
1406
1407 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1408 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1409
1410 while (__ipxitf_find_socket(intrfc, ntohs(socketNum)))
1411 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1412 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1413 else
1414 socketNum++;
1415
1416 spin_unlock_bh(&intrfc->if_sklist_lock);
1417 intrfc->if_sknum = socketNum;
1418
1419 return ntohs(socketNum);
1420 }
1421
1422 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1423 {
1424 struct sock *sk = sock->sk;
1425 struct ipx_sock *ipxs = ipx_sk(sk);
1426 struct ipx_interface *intrfc;
1427 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1428 int rc = -EINVAL;
1429
1430 if (!sk->sk_zapped || addr_len != sizeof(struct sockaddr_ipx))
1431 goto out;
1432
1433 intrfc = ipxitf_find_using_net(addr->sipx_network);
1434 rc = -EADDRNOTAVAIL;
1435 if (!intrfc)
1436 goto out;
1437
1438 if (!addr->sipx_port) {
1439 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1440 rc = -EINVAL;
1441 if (!addr->sipx_port)
1442 goto out_put;
1443 }
1444
1445 /* protect IPX system stuff like routing/sap */
1446 rc = -EACCES;
1447 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1448 !capable(CAP_NET_ADMIN))
1449 goto out_put;
1450
1451 ipxs->port = addr->sipx_port;
1452
1453 #ifdef CONFIG_IPX_INTERN
1454 if (intrfc == ipx_internal_net) {
1455 /* The source address is to be set explicitly if the
1456 * socket is to be bound on the internal network. If a
1457 * node number 0 was specified, the default is used.
1458 */
1459
1460 rc = -EINVAL;
1461 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1462 goto out_put;
1463 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1464 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1465 else
1466 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1467
1468 rc = -EADDRINUSE;
1469 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1470 ipxs->port)) {
1471 SOCK_DEBUG(sk,
1472 "IPX: bind failed because port %X in use.\n",
1473 ntohs((int)addr->sipx_port));
1474 goto out_put;
1475 }
1476 } else {
1477 /* Source addresses are easy. It must be our
1478 * network:node pair for an interface routed to IPX
1479 * with the ipx routing ioctl()
1480 */
1481
1482 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1483
1484 rc = -EADDRINUSE;
1485 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1486 SOCK_DEBUG(sk,
1487 "IPX: bind failed because port %X in use.\n",
1488 ntohs((int)addr->sipx_port));
1489 goto out_put;
1490 }
1491 }
1492
1493 #else /* !def CONFIG_IPX_INTERN */
1494
1495 /* Source addresses are easy. It must be our network:node pair for
1496 an interface routed to IPX with the ipx routing ioctl() */
1497
1498 rc = -EADDRINUSE;
1499 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1500 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1501 ntohs((int)addr->sipx_port));
1502 goto out_put;
1503 }
1504
1505 #endif /* CONFIG_IPX_INTERN */
1506
1507 ipxitf_insert_socket(intrfc, sk);
1508 sk->sk_zapped = 0;
1509
1510 rc = 0;
1511 out_put:
1512 ipxitf_put(intrfc);
1513 out:
1514 return rc;
1515 }
1516
1517 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1518 int addr_len, int flags)
1519 {
1520 struct sock *sk = sock->sk;
1521 struct ipx_sock *ipxs = ipx_sk(sk);
1522 struct sockaddr_ipx *addr;
1523 int rc = -EINVAL;
1524 struct ipx_route *rt;
1525
1526 sk->sk_state = TCP_CLOSE;
1527 sock->state = SS_UNCONNECTED;
1528
1529 if (addr_len != sizeof(*addr))
1530 goto out;
1531 addr = (struct sockaddr_ipx *)uaddr;
1532
1533 /* put the autobinding in */
1534 if (!ipxs->port) {
1535 struct sockaddr_ipx uaddr;
1536
1537 uaddr.sipx_port = 0;
1538 uaddr.sipx_network = 0;
1539
1540 #ifdef CONFIG_IPX_INTERN
1541 rc = -ENETDOWN;
1542 if (!ipxs->intrfc)
1543 goto out; /* Someone zonked the iface */
1544 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1545 IPX_NODE_LEN);
1546 #endif /* CONFIG_IPX_INTERN */
1547
1548 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1549 sizeof(struct sockaddr_ipx));
1550 if (rc)
1551 goto out;
1552 }
1553
1554 /* We can either connect to primary network or somewhere
1555 * we can route to */
1556 rt = ipxrtr_lookup(addr->sipx_network);
1557 rc = -ENETUNREACH;
1558 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1559 goto out;
1560
1561 ipxs->dest_addr.net = addr->sipx_network;
1562 ipxs->dest_addr.sock = addr->sipx_port;
1563 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1564 ipxs->type = addr->sipx_type;
1565
1566 if (sock->type == SOCK_DGRAM) {
1567 sock->state = SS_CONNECTED;
1568 sk->sk_state = TCP_ESTABLISHED;
1569 }
1570
1571 if (rt)
1572 ipxrtr_put(rt);
1573 rc = 0;
1574 out:
1575 return rc;
1576 }
1577
1578
1579 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1580 int *uaddr_len, int peer)
1581 {
1582 struct ipx_address *addr;
1583 struct sockaddr_ipx sipx;
1584 struct sock *sk = sock->sk;
1585 struct ipx_sock *ipxs = ipx_sk(sk);
1586 int rc;
1587
1588 *uaddr_len = sizeof(struct sockaddr_ipx);
1589
1590 if (peer) {
1591 rc = -ENOTCONN;
1592 if (sk->sk_state != TCP_ESTABLISHED)
1593 goto out;
1594
1595 addr = &ipxs->dest_addr;
1596 sipx.sipx_network = addr->net;
1597 sipx.sipx_port = addr->sock;
1598 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1599 } else {
1600 if (ipxs->intrfc) {
1601 sipx.sipx_network = ipxs->intrfc->if_netnum;
1602 #ifdef CONFIG_IPX_INTERN
1603 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1604 #else
1605 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1606 IPX_NODE_LEN);
1607 #endif /* CONFIG_IPX_INTERN */
1608
1609 } else {
1610 sipx.sipx_network = 0;
1611 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1612 }
1613
1614 sipx.sipx_port = ipxs->port;
1615 }
1616
1617 sipx.sipx_family = AF_IPX;
1618 sipx.sipx_type = ipxs->type;
1619 sipx.sipx_zero = 0;
1620 memcpy(uaddr, &sipx, sizeof(sipx));
1621
1622 rc = 0;
1623 out:
1624 return rc;
1625 }
1626
1627 static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
1628 {
1629 /* NULL here for pt means the packet was looped back */
1630 struct ipx_interface *intrfc;
1631 struct ipxhdr *ipx;
1632 u16 ipx_pktsize;
1633 int rc = 0;
1634
1635 /* Not ours */
1636 if (skb->pkt_type == PACKET_OTHERHOST)
1637 goto drop;
1638
1639 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1640 goto out;
1641
1642 ipx = ipx_hdr(skb);
1643 ipx_pktsize = ntohs(ipx->ipx_pktsize);
1644
1645 /* Too small or invalid header? */
1646 if (ipx_pktsize < sizeof(struct ipxhdr) || ipx_pktsize > skb->len)
1647 goto drop;
1648
1649 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1650 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1651 goto drop;
1652
1653 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1654 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1655 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1656
1657 /* Determine what local ipx endpoint this is */
1658 intrfc = ipxitf_find_using_phys(dev, pt->type);
1659 if (!intrfc) {
1660 if (ipxcfg_auto_create_interfaces &&
1661 ntohl(IPX_SKB_CB(skb)->ipx_dest_net)) {
1662 intrfc = ipxitf_auto_create(dev, pt->type);
1663 if (intrfc)
1664 ipxitf_hold(intrfc);
1665 }
1666
1667 if (!intrfc) /* Not one of ours */
1668 /* or invalid packet for auto creation */
1669 goto drop;
1670 }
1671
1672 rc = ipxitf_rcv(intrfc, skb);
1673 ipxitf_put(intrfc);
1674 goto out;
1675 drop:
1676 kfree_skb(skb);
1677 out:
1678 return rc;
1679 }
1680
1681 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1682 struct msghdr *msg, size_t len)
1683 {
1684 struct sock *sk = sock->sk;
1685 struct ipx_sock *ipxs = ipx_sk(sk);
1686 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1687 struct sockaddr_ipx local_sipx;
1688 int rc = -EINVAL;
1689 int flags = msg->msg_flags;
1690
1691 /* Socket gets bound below anyway */
1692 /* if (sk->sk_zapped)
1693 return -EIO; */ /* Socket not bound */
1694 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1695 goto out;
1696
1697 /* Max possible packet size limited by 16 bit pktsize in header */
1698 if (len >= 65535 - sizeof(struct ipxhdr))
1699 goto out;
1700
1701 if (usipx) {
1702 if (!ipxs->port) {
1703 struct sockaddr_ipx uaddr;
1704
1705 uaddr.sipx_port = 0;
1706 uaddr.sipx_network = 0;
1707 #ifdef CONFIG_IPX_INTERN
1708 rc = -ENETDOWN;
1709 if (!ipxs->intrfc)
1710 goto out; /* Someone zonked the iface */
1711 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1712 IPX_NODE_LEN);
1713 #endif
1714 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1715 sizeof(struct sockaddr_ipx));
1716 if (rc)
1717 goto out;
1718 }
1719
1720 rc = -EINVAL;
1721 if (msg->msg_namelen < sizeof(*usipx) ||
1722 usipx->sipx_family != AF_IPX)
1723 goto out;
1724 } else {
1725 rc = -ENOTCONN;
1726 if (sk->sk_state != TCP_ESTABLISHED)
1727 goto out;
1728
1729 usipx = &local_sipx;
1730 usipx->sipx_family = AF_IPX;
1731 usipx->sipx_type = ipxs->type;
1732 usipx->sipx_port = ipxs->dest_addr.sock;
1733 usipx->sipx_network = ipxs->dest_addr.net;
1734 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1735 }
1736
1737 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1738 flags & MSG_DONTWAIT);
1739 if (rc >= 0)
1740 rc = len;
1741 out:
1742 return rc;
1743 }
1744
1745
1746 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1747 struct msghdr *msg, size_t size, int flags)
1748 {
1749 struct sock *sk = sock->sk;
1750 struct ipx_sock *ipxs = ipx_sk(sk);
1751 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1752 struct ipxhdr *ipx = NULL;
1753 struct sk_buff *skb;
1754 int copied, rc;
1755
1756 /* put the autobinding in */
1757 if (!ipxs->port) {
1758 struct sockaddr_ipx uaddr;
1759
1760 uaddr.sipx_port = 0;
1761 uaddr.sipx_network = 0;
1762
1763 #ifdef CONFIG_IPX_INTERN
1764 rc = -ENETDOWN;
1765 if (!ipxs->intrfc)
1766 goto out; /* Someone zonked the iface */
1767 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1768 #endif /* CONFIG_IPX_INTERN */
1769
1770 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1771 sizeof(struct sockaddr_ipx));
1772 if (rc)
1773 goto out;
1774 }
1775
1776 rc = -ENOTCONN;
1777 if (sk->sk_zapped)
1778 goto out;
1779
1780 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1781 flags & MSG_DONTWAIT, &rc);
1782 if (!skb)
1783 goto out;
1784
1785 ipx = ipx_hdr(skb);
1786 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1787 if (copied > size) {
1788 copied = size;
1789 msg->msg_flags |= MSG_TRUNC;
1790 }
1791
1792 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1793 copied);
1794 if (rc)
1795 goto out_free;
1796 if (skb->stamp.tv_sec)
1797 sk->sk_stamp = skb->stamp;
1798
1799 msg->msg_namelen = sizeof(*sipx);
1800
1801 if (sipx) {
1802 sipx->sipx_family = AF_IPX;
1803 sipx->sipx_port = ipx->ipx_source.sock;
1804 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1805 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1806 sipx->sipx_type = ipx->ipx_type;
1807 sipx->sipx_zero = 0;
1808 }
1809 rc = copied;
1810
1811 out_free:
1812 skb_free_datagram(sk, skb);
1813 out:
1814 return rc;
1815 }
1816
1817
1818 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1819 {
1820 int rc = 0;
1821 long amount = 0;
1822 struct sock *sk = sock->sk;
1823 void __user *argp = (void __user *)arg;
1824
1825 switch (cmd) {
1826 case TIOCOUTQ:
1827 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1828 if (amount < 0)
1829 amount = 0;
1830 rc = put_user(amount, (int __user *)argp);
1831 break;
1832 case TIOCINQ: {
1833 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1834 /* These two are safe on a single CPU system as only
1835 * user tasks fiddle here */
1836 if (skb)
1837 amount = skb->len - sizeof(struct ipxhdr);
1838 rc = put_user(amount, (int __user *)argp);
1839 break;
1840 }
1841 case SIOCADDRT:
1842 case SIOCDELRT:
1843 rc = -EPERM;
1844 if (capable(CAP_NET_ADMIN))
1845 rc = ipxrtr_ioctl(cmd, argp);
1846 break;
1847 case SIOCSIFADDR:
1848 case SIOCAIPXITFCRT:
1849 case SIOCAIPXPRISLT:
1850 rc = -EPERM;
1851 if (!capable(CAP_NET_ADMIN))
1852 break;
1853 case SIOCGIFADDR:
1854 rc = ipxitf_ioctl(cmd, argp);
1855 break;
1856 case SIOCIPXCFGDATA:
1857 rc = ipxcfg_get_config_data(argp);
1858 break;
1859 case SIOCIPXNCPCONN:
1860 /*
1861 * This socket wants to take care of the NCP connection
1862 * handed to us in arg.
1863 */
1864 rc = -EPERM;
1865 if (!capable(CAP_NET_ADMIN))
1866 break;
1867 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1868 (const unsigned short __user *)argp);
1869 break;
1870 case SIOCGSTAMP:
1871 rc = -EINVAL;
1872 if (sk)
1873 rc = sock_get_timestamp(sk, argp);
1874 break;
1875 case SIOCGIFDSTADDR:
1876 case SIOCSIFDSTADDR:
1877 case SIOCGIFBRDADDR:
1878 case SIOCSIFBRDADDR:
1879 case SIOCGIFNETMASK:
1880 case SIOCSIFNETMASK:
1881 rc = -EINVAL;
1882 break;
1883 default:
1884 rc = dev_ioctl(cmd, argp);
1885 break;
1886 }
1887
1888 return rc;
1889 }
1890
1891 /*
1892 * Socket family declarations
1893 */
1894
1895 static struct net_proto_family ipx_family_ops = {
1896 .family = PF_IPX,
1897 .create = ipx_create,
1898 .owner = THIS_MODULE,
1899 };
1900
1901 static struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
1902 .family = PF_IPX,
1903 .owner = THIS_MODULE,
1904 .release = ipx_release,
1905 .bind = ipx_bind,
1906 .connect = ipx_connect,
1907 .socketpair = sock_no_socketpair,
1908 .accept = sock_no_accept,
1909 .getname = ipx_getname,
1910 .poll = datagram_poll,
1911 .ioctl = ipx_ioctl,
1912 .listen = sock_no_listen,
1913 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1914 .setsockopt = ipx_setsockopt,
1915 .getsockopt = ipx_getsockopt,
1916 .sendmsg = ipx_sendmsg,
1917 .recvmsg = ipx_recvmsg,
1918 .mmap = sock_no_mmap,
1919 .sendpage = sock_no_sendpage,
1920 };
1921
1922 #include <linux/smp_lock.h>
1923 SOCKOPS_WRAP(ipx_dgram, PF_IPX);
1924
1925 static struct packet_type ipx_8023_packet_type = {
1926 .type = __constant_htons(ETH_P_802_3),
1927 .func = ipx_rcv,
1928 };
1929
1930 static struct packet_type ipx_dix_packet_type = {
1931 .type = __constant_htons(ETH_P_IPX),
1932 .func = ipx_rcv,
1933 };
1934
1935 static struct notifier_block ipx_dev_notifier = {
1936 .notifier_call = ipxitf_device_event,
1937 };
1938
1939 extern struct datalink_proto *make_EII_client(void);
1940 extern struct datalink_proto *make_8023_client(void);
1941 extern void destroy_EII_client(struct datalink_proto *);
1942 extern void destroy_8023_client(struct datalink_proto *);
1943
1944 static unsigned char ipx_8022_type = 0xE0;
1945 static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1946 static char ipx_EII_err_msg[] __initdata =
1947 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1948 static char ipx_8023_err_msg[] __initdata =
1949 KERN_CRIT "IPX: Unable to register with 802.3\n";
1950 static char ipx_llc_err_msg[] __initdata =
1951 KERN_CRIT "IPX: Unable to register with 802.2\n";
1952 static char ipx_snap_err_msg[] __initdata =
1953 KERN_CRIT "IPX: Unable to register with SNAP\n";
1954
1955 static int __init ipx_init(void)
1956 {
1957 ipx_sk_slab = kmem_cache_create("ipx_sock",
1958 sizeof(struct ipx_sock), 0,
1959 SLAB_HWCACHE_ALIGN, NULL, NULL);
1960
1961 if (ipx_sk_slab == NULL)
1962 return -ENOMEM;
1963
1964 sock_register(&ipx_family_ops);
1965
1966 pEII_datalink = make_EII_client();
1967 if (pEII_datalink)
1968 dev_add_pack(&ipx_dix_packet_type);
1969 else
1970 printk(ipx_EII_err_msg);
1971
1972 p8023_datalink = make_8023_client();
1973 if (p8023_datalink)
1974 dev_add_pack(&ipx_8023_packet_type);
1975 else
1976 printk(ipx_8023_err_msg);
1977
1978 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
1979 if (!p8022_datalink)
1980 printk(ipx_llc_err_msg);
1981
1982 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
1983 if (!pSNAP_datalink)
1984 printk(ipx_snap_err_msg);
1985
1986 register_netdevice_notifier(&ipx_dev_notifier);
1987 ipx_register_sysctl();
1988 ipx_proc_init();
1989 return 0;
1990 }
1991
1992 static void __exit ipx_proto_finito(void)
1993 {
1994 ipx_proc_exit();
1995 ipx_unregister_sysctl();
1996
1997 unregister_netdevice_notifier(&ipx_dev_notifier);
1998
1999 ipxitf_cleanup();
2000
2001 unregister_snap_client(pSNAP_datalink);
2002 pSNAP_datalink = NULL;
2003
2004 unregister_8022_client(p8022_datalink);
2005 p8022_datalink = NULL;
2006
2007 dev_remove_pack(&ipx_8023_packet_type);
2008 destroy_8023_client(p8023_datalink);
2009 p8023_datalink = NULL;
2010
2011 dev_remove_pack(&ipx_dix_packet_type);
2012 destroy_EII_client(pEII_datalink);
2013 pEII_datalink = NULL;
2014
2015 if (ipx_sk_slab != NULL) {
2016 kmem_cache_destroy(ipx_sk_slab);
2017 ipx_sk_slab = NULL;
2018 }
2019
2020 sock_unregister(ipx_family_ops.family);
2021 }
2022
2023 module_init(ipx_init);
2024 module_exit(ipx_proto_finito);
2025 MODULE_LICENSE("GPL");
2026 MODULE_ALIAS_NETPROTO(PF_IPX);
2027
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