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Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
[linux-2.6.git] / net / ipx / af_ipx.c
blobf547a47d381ca0596244bfbf692ef8134b508ccc
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/capability.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/slab.h>
44 #include <linux/skbuff.h>
45 #include <linux/socket.h>
46 #include <linux/sockios.h>
47 #include <linux/string.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 #include <net/tcp_states.h>
56
57 #include <asm/uaccess.h>
58
59 #ifdef CONFIG_SYSCTL
60 extern void ipx_register_sysctl(void);
61 extern void ipx_unregister_sysctl(void);
62 #else
63 #define ipx_register_sysctl()
64 #define ipx_unregister_sysctl()
65 #endif
66
67 /* Configuration Variables */
68 static unsigned char ipxcfg_max_hops = 16;
69 static char ipxcfg_auto_select_primary;
70 static char ipxcfg_auto_create_interfaces;
71 int sysctl_ipx_pprop_broadcasting = 1;
72
73 /* Global Variables */
74 static struct datalink_proto *p8022_datalink;
75 static struct datalink_proto *pEII_datalink;
76 static struct datalink_proto *p8023_datalink;
77 static struct datalink_proto *pSNAP_datalink;
78
79 static const struct proto_ops ipx_dgram_ops;
80
81 LIST_HEAD(ipx_interfaces);
82 DEFINE_SPINLOCK(ipx_interfaces_lock);
83
84 struct ipx_interface *ipx_primary_net;
85 struct ipx_interface *ipx_internal_net;
86
87 extern int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
88 unsigned char *node);
89 extern void ipxrtr_del_routes(struct ipx_interface *intrfc);
90 extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
91 struct iovec *iov, size_t len, int noblock);
92 extern int ipxrtr_route_skb(struct sk_buff *skb);
93 extern struct ipx_route *ipxrtr_lookup(__be32 net);
94 extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
95
96 struct ipx_interface *ipx_interfaces_head(void)
97 {
98 struct ipx_interface *rc = NULL;
99
100 if (!list_empty(&ipx_interfaces))
101 rc = list_entry(ipx_interfaces.next,
102 struct ipx_interface, node);
103 return rc;
104 }
105
106 static void ipxcfg_set_auto_select(char val)
107 {
108 ipxcfg_auto_select_primary = val;
109 if (val && !ipx_primary_net)
110 ipx_primary_net = ipx_interfaces_head();
111 }
112
113 static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
114 {
115 struct ipx_config_data vals;
116
117 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
118 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
119
120 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
121 }
122
123 /*
124 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
125 * handler using this technique. They can be added although we do not
126 * use this facility.
127 */
128
129 static void ipx_remove_socket(struct sock *sk)
130 {
131 /* Determine interface with which socket is associated */
132 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
133
134 if (!intrfc)
135 goto out;
136
137 ipxitf_hold(intrfc);
138 spin_lock_bh(&intrfc->if_sklist_lock);
139 sk_del_node_init(sk);
140 spin_unlock_bh(&intrfc->if_sklist_lock);
141 ipxitf_put(intrfc);
142 out:
143 return;
144 }
145
146 static void ipx_destroy_socket(struct sock *sk)
147 {
148 ipx_remove_socket(sk);
149 skb_queue_purge(&sk->sk_receive_queue);
150 sk_refcnt_debug_dec(sk);
151 }
152
153 /*
154 * The following code is used to support IPX Interfaces (IPXITF). An
155 * IPX interface is defined by a physical device and a frame type.
156 */
157
158 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
159
160 static void ipxitf_clear_primary_net(void)
161 {
162 ipx_primary_net = NULL;
163 if (ipxcfg_auto_select_primary)
164 ipx_primary_net = ipx_interfaces_head();
165 }
166
167 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
168 __be16 datalink)
169 {
170 struct ipx_interface *i;
171
172 list_for_each_entry(i, &ipx_interfaces, node)
173 if (i->if_dev == dev && i->if_dlink_type == datalink)
174 goto out;
175 i = NULL;
176 out:
177 return i;
178 }
179
180 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
181 __be16 datalink)
182 {
183 struct ipx_interface *i;
184
185 spin_lock_bh(&ipx_interfaces_lock);
186 i = __ipxitf_find_using_phys(dev, datalink);
187 if (i)
188 ipxitf_hold(i);
189 spin_unlock_bh(&ipx_interfaces_lock);
190 return i;
191 }
192
193 struct ipx_interface *ipxitf_find_using_net(__be32 net)
194 {
195 struct ipx_interface *i;
196
197 spin_lock_bh(&ipx_interfaces_lock);
198 if (net) {
199 list_for_each_entry(i, &ipx_interfaces, node)
200 if (i->if_netnum == net)
201 goto hold;
202 i = NULL;
203 goto unlock;
204 }
205
206 i = ipx_primary_net;
207 if (i)
208 hold:
209 ipxitf_hold(i);
210 unlock:
211 spin_unlock_bh(&ipx_interfaces_lock);
212 return i;
213 }
214
215 /* Sockets are bound to a particular IPX interface. */
216 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
217 {
218 ipxitf_hold(intrfc);
219 spin_lock_bh(&intrfc->if_sklist_lock);
220 ipx_sk(sk)->intrfc = intrfc;
221 sk_add_node(sk, &intrfc->if_sklist);
222 spin_unlock_bh(&intrfc->if_sklist_lock);
223 ipxitf_put(intrfc);
224 }
225
226 /* caller must hold intrfc->if_sklist_lock */
227 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
228 __be16 port)
229 {
230 struct sock *s;
231
232 sk_for_each(s, &intrfc->if_sklist)
233 if (ipx_sk(s)->port == port)
234 goto found;
235 s = NULL;
236 found:
237 return s;
238 }
239
240 /* caller must hold a reference to intrfc */
241 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
242 __be16 port)
243 {
244 struct sock *s;
245
246 spin_lock_bh(&intrfc->if_sklist_lock);
247 s = __ipxitf_find_socket(intrfc, port);
248 if (s)
249 sock_hold(s);
250 spin_unlock_bh(&intrfc->if_sklist_lock);
251
252 return s;
253 }
254
255 #ifdef CONFIG_IPX_INTERN
256 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
257 unsigned char *ipx_node,
258 __be16 port)
259 {
260 struct sock *s;
261
262 ipxitf_hold(intrfc);
263 spin_lock_bh(&intrfc->if_sklist_lock);
264
265 sk_for_each(s, &intrfc->if_sklist) {
266 struct ipx_sock *ipxs = ipx_sk(s);
267
268 if (ipxs->port == port &&
269 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
270 goto found;
271 }
272 s = NULL;
273 found:
274 spin_unlock_bh(&intrfc->if_sklist_lock);
275 ipxitf_put(intrfc);
276 return s;
277 }
278 #endif
279
280 static void __ipxitf_down(struct ipx_interface *intrfc)
281 {
282 struct sock *s;
283 struct hlist_node *t;
284
285 /* Delete all routes associated with this interface */
286 ipxrtr_del_routes(intrfc);
287
288 spin_lock_bh(&intrfc->if_sklist_lock);
289 /* error sockets */
290 sk_for_each_safe(s, t, &intrfc->if_sklist) {
291 struct ipx_sock *ipxs = ipx_sk(s);
292
293 s->sk_err = ENOLINK;
294 s->sk_error_report(s);
295 ipxs->intrfc = NULL;
296 ipxs->port = 0;
297 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
298 sk_del_node_init(s);
299 }
300 INIT_HLIST_HEAD(&intrfc->if_sklist);
301 spin_unlock_bh(&intrfc->if_sklist_lock);
302
303 /* remove this interface from list */
304 list_del(&intrfc->node);
305
306 /* remove this interface from *special* networks */
307 if (intrfc == ipx_primary_net)
308 ipxitf_clear_primary_net();
309 if (intrfc == ipx_internal_net)
310 ipx_internal_net = NULL;
311
312 if (intrfc->if_dev)
313 dev_put(intrfc->if_dev);
314 kfree(intrfc);
315 }
316
317 void ipxitf_down(struct ipx_interface *intrfc)
318 {
319 spin_lock_bh(&ipx_interfaces_lock);
320 __ipxitf_down(intrfc);
321 spin_unlock_bh(&ipx_interfaces_lock);
322 }
323
324 static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
325 {
326 if (atomic_dec_and_test(&intrfc->refcnt))
327 __ipxitf_down(intrfc);
328 }
329
330 static int ipxitf_device_event(struct notifier_block *notifier,
331 unsigned long event, void *ptr)
332 {
333 struct net_device *dev = ptr;
334 struct ipx_interface *i, *tmp;
335
336 if (!net_eq(dev_net(dev), &init_net))
337 return NOTIFY_DONE;
338
339 if (event != NETDEV_DOWN && event != NETDEV_UP)
340 goto out;
341
342 spin_lock_bh(&ipx_interfaces_lock);
343 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
344 if (i->if_dev == dev) {
345 if (event == NETDEV_UP)
346 ipxitf_hold(i);
347 else
348 __ipxitf_put(i);
349 }
350 spin_unlock_bh(&ipx_interfaces_lock);
351 out:
352 return NOTIFY_DONE;
353 }
354
355
356 static __exit void ipxitf_cleanup(void)
357 {
358 struct ipx_interface *i, *tmp;
359
360 spin_lock_bh(&ipx_interfaces_lock);
361 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
362 __ipxitf_put(i);
363 spin_unlock_bh(&ipx_interfaces_lock);
364 }
365
366 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
367 {
368 if (sock_queue_rcv_skb(sock, skb) < 0)
369 kfree_skb(skb);
370 }
371
372 /*
373 * On input skb->sk is NULL. Nobody is charged for the memory.
374 */
375
376 /* caller must hold a reference to intrfc */
377
378 #ifdef CONFIG_IPX_INTERN
379 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
380 struct sk_buff *skb, int copy)
381 {
382 struct ipxhdr *ipx = ipx_hdr(skb);
383 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
384 IPX_NODE_LEN);
385 struct sock *s;
386 int rc;
387
388 spin_lock_bh(&intrfc->if_sklist_lock);
389
390 sk_for_each(s, &intrfc->if_sklist) {
391 struct ipx_sock *ipxs = ipx_sk(s);
392
393 if (ipxs->port == ipx->ipx_dest.sock &&
394 (is_broadcast || !memcmp(ipx->ipx_dest.node,
395 ipxs->node, IPX_NODE_LEN))) {
396 /* We found a socket to which to send */
397 struct sk_buff *skb1;
398
399 if (copy) {
400 skb1 = skb_clone(skb, GFP_ATOMIC);
401 rc = -ENOMEM;
402 if (!skb1)
403 goto out;
404 } else {
405 skb1 = skb;
406 copy = 1; /* skb may only be used once */
407 }
408 ipxitf_def_skb_handler(s, skb1);
409
410 /* On an external interface, one socket can listen */
411 if (intrfc != ipx_internal_net)
412 break;
413 }
414 }
415
416 /* skb was solely for us, and we did not make a copy, so free it. */
417 if (!copy)
418 kfree_skb(skb);
419
420 rc = 0;
421 out:
422 spin_unlock_bh(&intrfc->if_sklist_lock);
423 return rc;
424 }
425 #else
426 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
427 struct ipxhdr *ipx)
428 {
429 /* The packet's target is a NCP connection handler. We want to hand it
430 * to the correct socket directly within the kernel, so that the
431 * mars_nwe packet distribution process does not have to do it. Here we
432 * only care about NCP and BURST packets.
433 *
434 * You might call this a hack, but believe me, you do not want a
435 * complete NCP layer in the kernel, and this is VERY fast as well. */
436 struct sock *sk = NULL;
437 int connection = 0;
438 u8 *ncphdr = (u8 *)(ipx + 1);
439
440 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
441 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
442 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
443 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
444
445 if (connection) {
446 /* Now we have to look for a special NCP connection handling
447 * socket. Only these sockets have ipx_ncp_conn != 0, set by
448 * SIOCIPXNCPCONN. */
449 spin_lock_bh(&intrfc->if_sklist_lock);
450 sk_for_each(sk, &intrfc->if_sklist)
451 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
452 sock_hold(sk);
453 goto found;
454 }
455 sk = NULL;
456 found:
457 spin_unlock_bh(&intrfc->if_sklist_lock);
458 }
459 return sk;
460 }
461
462 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
463 struct sk_buff *skb, int copy)
464 {
465 struct ipxhdr *ipx = ipx_hdr(skb);
466 struct sock *sock1 = NULL, *sock2 = NULL;
467 struct sk_buff *skb1 = NULL, *skb2 = NULL;
468 int rc;
469
470 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
471 sock1 = ncp_connection_hack(intrfc, ipx);
472 if (!sock1)
473 /* No special socket found, forward the packet the normal way */
474 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
475
476 /*
477 * We need to check if there is a primary net and if
478 * this is addressed to one of the *SPECIAL* sockets because
479 * these need to be propagated to the primary net.
480 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
481 * 0x456(Diagnostic).
482 */
483
484 if (ipx_primary_net && intrfc != ipx_primary_net) {
485 const int dsock = ntohs(ipx->ipx_dest.sock);
486
487 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
488 /* The appropriate thing to do here is to dup the
489 * packet and route to the primary net interface via
490 * ipxitf_send; however, we'll cheat and just demux it
491 * here. */
492 sock2 = ipxitf_find_socket(ipx_primary_net,
493 ipx->ipx_dest.sock);
494 }
495
496 /*
497 * If there is nothing to do return. The kfree will cancel any charging.
498 */
499 rc = 0;
500 if (!sock1 && !sock2) {
501 if (!copy)
502 kfree_skb(skb);
503 goto out;
504 }
505
506 /*
507 * This next segment of code is a little awkward, but it sets it up
508 * so that the appropriate number of copies of the SKB are made and
509 * that skb1 and skb2 point to it (them) so that it (they) can be
510 * demuxed to sock1 and/or sock2. If we are unable to make enough
511 * copies, we do as much as is possible.
512 */
513
514 if (copy)
515 skb1 = skb_clone(skb, GFP_ATOMIC);
516 else
517 skb1 = skb;
518
519 rc = -ENOMEM;
520 if (!skb1)
521 goto out_put;
522
523 /* Do we need 2 SKBs? */
524 if (sock1 && sock2)
525 skb2 = skb_clone(skb1, GFP_ATOMIC);
526 else
527 skb2 = skb1;
528
529 if (sock1)
530 ipxitf_def_skb_handler(sock1, skb1);
531
532 if (!skb2)
533 goto out_put;
534
535 if (sock2)
536 ipxitf_def_skb_handler(sock2, skb2);
537
538 rc = 0;
539 out_put:
540 if (sock1)
541 sock_put(sock1);
542 if (sock2)
543 sock_put(sock2);
544 out:
545 return rc;
546 }
547 #endif /* CONFIG_IPX_INTERN */
548
549 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
550 struct sk_buff *skb)
551 {
552 struct sk_buff *skb2;
553 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
554 int out_offset = intrfc->if_ipx_offset;
555 int len;
556
557 /* Hopefully, most cases */
558 if (in_offset >= out_offset)
559 return skb;
560
561 /* Need new SKB */
562 len = skb->len + out_offset;
563 skb2 = alloc_skb(len, GFP_ATOMIC);
564 if (skb2) {
565 skb_reserve(skb2, out_offset);
566 skb_reset_network_header(skb2);
567 skb_reset_transport_header(skb2);
568 skb_put(skb2, skb->len);
569 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
570 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
571 }
572 kfree_skb(skb);
573 return skb2;
574 }
575
576 /* caller must hold a reference to intrfc and the skb has to be unshared */
577 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
578 {
579 struct ipxhdr *ipx = ipx_hdr(skb);
580 struct net_device *dev = intrfc->if_dev;
581 struct datalink_proto *dl = intrfc->if_dlink;
582 char dest_node[IPX_NODE_LEN];
583 int send_to_wire = 1;
584 int addr_len;
585
586 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
587 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
588 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
589
590 /* see if we need to include the netnum in the route list */
591 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
592 __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
593 sizeof(struct ipxhdr) +
594 IPX_SKB_CB(skb)->last_hop.index *
595 sizeof(__be32));
596 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
597 IPX_SKB_CB(skb)->last_hop.index = -1;
598 }
599
600 /*
601 * We need to know how many skbuffs it will take to send out this
602 * packet to avoid unnecessary copies.
603 */
604
605 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
606 send_to_wire = 0; /* No non looped */
607
608 /*
609 * See if this should be demuxed to sockets on this interface
610 *
611 * We want to ensure the original was eaten or that we only use
612 * up clones.
613 */
614
615 if (ipx->ipx_dest.net == intrfc->if_netnum) {
616 /*
617 * To our own node, loop and free the original.
618 * The internal net will receive on all node address.
619 */
620 if (intrfc == ipx_internal_net ||
621 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
622 /* Don't charge sender */
623 skb_orphan(skb);
624
625 /* Will charge receiver */
626 return ipxitf_demux_socket(intrfc, skb, 0);
627 }
628
629 /* Broadcast, loop and possibly keep to send on. */
630 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
631 if (!send_to_wire)
632 skb_orphan(skb);
633 ipxitf_demux_socket(intrfc, skb, send_to_wire);
634 if (!send_to_wire)
635 goto out;
636 }
637 }
638
639 /*
640 * If the originating net is not equal to our net; this is routed
641 * We are still charging the sender. Which is right - the driver
642 * free will handle this fairly.
643 */
644 if (ipx->ipx_source.net != intrfc->if_netnum) {
645 /*
646 * Unshare the buffer before modifying the count in
647 * case it's a flood or tcpdump
648 */
649 skb = skb_unshare(skb, GFP_ATOMIC);
650 if (!skb)
651 goto out;
652 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
653 send_to_wire = 0;
654 }
655
656 if (!send_to_wire) {
657 kfree_skb(skb);
658 goto out;
659 }
660
661 /* Determine the appropriate hardware address */
662 addr_len = dev->addr_len;
663 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
664 memcpy(dest_node, dev->broadcast, addr_len);
665 else
666 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
667
668 /* Make any compensation for differing physical/data link size */
669 skb = ipxitf_adjust_skbuff(intrfc, skb);
670 if (!skb)
671 goto out;
672
673 /* set up data link and physical headers */
674 skb->dev = dev;
675 skb->protocol = htons(ETH_P_IPX);
676
677 /* Send it out */
678 dl->request(dl, skb, dest_node);
679 out:
680 return 0;
681 }
682
683 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
684 {
685 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
686 }
687
688 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
689 struct sk_buff *skb);
690 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
691
692 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
693 {
694 struct ipxhdr *ipx = ipx_hdr(skb);
695 int rc = 0;
696
697 ipxitf_hold(intrfc);
698
699 /* See if we should update our network number */
700 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
701 ipxitf_discover_netnum(intrfc, skb);
702
703 IPX_SKB_CB(skb)->last_hop.index = -1;
704 if (ipx->ipx_type == IPX_TYPE_PPROP) {
705 rc = ipxitf_pprop(intrfc, skb);
706 if (rc)
707 goto out_free_skb;
708 }
709
710 /* local processing follows */
711 if (!IPX_SKB_CB(skb)->ipx_dest_net)
712 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
713 if (!IPX_SKB_CB(skb)->ipx_source_net)
714 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
715
716 /* it doesn't make sense to route a pprop packet, there's no meaning
717 * in the ipx_dest_net for such packets */
718 if (ipx->ipx_type != IPX_TYPE_PPROP &&
719 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
720 /* We only route point-to-point packets. */
721 if (skb->pkt_type == PACKET_HOST) {
722 skb = skb_unshare(skb, GFP_ATOMIC);
723 if (skb)
724 rc = ipxrtr_route_skb(skb);
725 goto out_intrfc;
726 }
727
728 goto out_free_skb;
729 }
730
731 /* see if we should keep it */
732 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
733 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
734 rc = ipxitf_demux_socket(intrfc, skb, 0);
735 goto out_intrfc;
736 }
737
738 /* we couldn't pawn it off so unload it */
739 out_free_skb:
740 kfree_skb(skb);
741 out_intrfc:
742 ipxitf_put(intrfc);
743 return rc;
744 }
745
746 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
747 struct sk_buff *skb)
748 {
749 const struct ipx_cb *cb = IPX_SKB_CB(skb);
750
751 /* see if this is an intra packet: source_net == dest_net */
752 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
753 struct ipx_interface *i =
754 ipxitf_find_using_net(cb->ipx_source_net);
755 /* NB: NetWare servers lie about their hop count so we
756 * dropped the test based on it. This is the best way
757 * to determine this is a 0 hop count packet. */
758 if (!i) {
759 intrfc->if_netnum = cb->ipx_source_net;
760 ipxitf_add_local_route(intrfc);
761 } else {
762 printk(KERN_WARNING "IPX: Network number collision "
763 "%lx\n %s %s and %s %s\n",
764 (unsigned long) ntohl(cb->ipx_source_net),
765 ipx_device_name(i),
766 ipx_frame_name(i->if_dlink_type),
767 ipx_device_name(intrfc),
768 ipx_frame_name(intrfc->if_dlink_type));
769 ipxitf_put(i);
770 }
771 }
772 }
773
774 /**
775 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
776 * NetBIOS broadcasts
777 * @intrfc: IPX interface receiving this packet
778 * @skb: Received packet
779 *
780 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
781 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
782 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
783 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
784 * RIP and SAP Router Specification", Part Number 107-000029-001.
785 *
786 * If it is valid, check if we have pprop broadcasting enabled by the user,
787 * if not, just return zero for local processing.
788 *
789 * If it is enabled check the packet and don't broadcast it if we have already
790 * seen this packet.
791 *
792 * Broadcast: send it to the interfaces that aren't on the packet visited nets
793 * array, just after the IPX header.
794 *
795 * Returns -EINVAL for invalid packets, so that the calling function drops
796 * the packet without local processing. 0 if packet is to be locally processed.
797 */
798 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
799 {
800 struct ipxhdr *ipx = ipx_hdr(skb);
801 int i, rc = -EINVAL;
802 struct ipx_interface *ifcs;
803 char *c;
804 __be32 *l;
805
806 /* Illegal packet - too many hops or too short */
807 /* We decide to throw it away: no broadcasting, no local processing.
808 * NetBIOS unaware implementations route them as normal packets -
809 * tctrl <= 15, any data payload... */
810 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
811 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
812 IPX_MAX_PPROP_HOPS * sizeof(u32))
813 goto out;
814 /* are we broadcasting this damn thing? */
815 rc = 0;
816 if (!sysctl_ipx_pprop_broadcasting)
817 goto out;
818 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
819 * process it locally. All previous hops broadcasted it, and process it
820 * locally. */
821 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
822 goto out;
823
824 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
825 l = (__be32 *) c;
826
827 /* Don't broadcast packet if already seen this net */
828 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
829 if (*l++ == intrfc->if_netnum)
830 goto out;
831
832 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
833 * position where we will insert recvd netnum into list, later on,
834 * in ipxitf_send */
835 IPX_SKB_CB(skb)->last_hop.index = i;
836 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
837 /* xmit on all other interfaces... */
838 spin_lock_bh(&ipx_interfaces_lock);
839 list_for_each_entry(ifcs, &ipx_interfaces, node) {
840 /* Except unconfigured interfaces */
841 if (!ifcs->if_netnum)
842 continue;
843
844 /* That aren't in the list */
845 if (ifcs == intrfc)
846 continue;
847 l = (__be32 *) c;
848 /* don't consider the last entry in the packet list,
849 * it is our netnum, and it is not there yet */
850 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
851 if (ifcs->if_netnum == *l++)
852 break;
853 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
854 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
855
856 if (s) {
857 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
858 ipxrtr_route_skb(s);
859 }
860 }
861 }
862 spin_unlock_bh(&ipx_interfaces_lock);
863 out:
864 return rc;
865 }
866
867 static void ipxitf_insert(struct ipx_interface *intrfc)
868 {
869 spin_lock_bh(&ipx_interfaces_lock);
870 list_add_tail(&intrfc->node, &ipx_interfaces);
871 spin_unlock_bh(&ipx_interfaces_lock);
872
873 if (ipxcfg_auto_select_primary && !ipx_primary_net)
874 ipx_primary_net = intrfc;
875 }
876
877 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
878 __be16 dlink_type,
879 struct datalink_proto *dlink,
880 unsigned char internal,
881 int ipx_offset)
882 {
883 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
884
885 if (intrfc) {
886 intrfc->if_dev = dev;
887 intrfc->if_netnum = netnum;
888 intrfc->if_dlink_type = dlink_type;
889 intrfc->if_dlink = dlink;
890 intrfc->if_internal = internal;
891 intrfc->if_ipx_offset = ipx_offset;
892 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
893 INIT_HLIST_HEAD(&intrfc->if_sklist);
894 atomic_set(&intrfc->refcnt, 1);
895 spin_lock_init(&intrfc->if_sklist_lock);
896 }
897
898 return intrfc;
899 }
900
901 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
902 {
903 struct ipx_interface *intrfc;
904 int rc = -EEXIST;
905
906 /* Only one primary network allowed */
907 if (ipx_primary_net)
908 goto out;
909
910 /* Must have a valid network number */
911 rc = -EADDRNOTAVAIL;
912 if (!idef->ipx_network)
913 goto out;
914 intrfc = ipxitf_find_using_net(idef->ipx_network);
915 rc = -EADDRINUSE;
916 if (intrfc) {
917 ipxitf_put(intrfc);
918 goto out;
919 }
920 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
921 rc = -EAGAIN;
922 if (!intrfc)
923 goto out;
924 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
925 ipx_internal_net = ipx_primary_net = intrfc;
926 ipxitf_hold(intrfc);
927 ipxitf_insert(intrfc);
928
929 rc = ipxitf_add_local_route(intrfc);
930 ipxitf_put(intrfc);
931 out:
932 return rc;
933 }
934
935 static __be16 ipx_map_frame_type(unsigned char type)
936 {
937 __be16 rc = 0;
938
939 switch (type) {
940 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
941 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
942 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
943 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
944 }
945
946 return rc;
947 }
948
949 static int ipxitf_create(struct ipx_interface_definition *idef)
950 {
951 struct net_device *dev;
952 __be16 dlink_type = 0;
953 struct datalink_proto *datalink = NULL;
954 struct ipx_interface *intrfc;
955 int rc;
956
957 if (idef->ipx_special == IPX_INTERNAL) {
958 rc = ipxitf_create_internal(idef);
959 goto out;
960 }
961
962 rc = -EEXIST;
963 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
964 goto out;
965
966 intrfc = ipxitf_find_using_net(idef->ipx_network);
967 rc = -EADDRINUSE;
968 if (idef->ipx_network && intrfc) {
969 ipxitf_put(intrfc);
970 goto out;
971 }
972
973 if (intrfc)
974 ipxitf_put(intrfc);
975
976 dev = dev_get_by_name(&init_net, idef->ipx_device);
977 rc = -ENODEV;
978 if (!dev)
979 goto out;
980
981 switch (idef->ipx_dlink_type) {
982 case IPX_FRAME_8022:
983 dlink_type = htons(ETH_P_802_2);
984 datalink = p8022_datalink;
985 break;
986 case IPX_FRAME_ETHERII:
987 if (dev->type != ARPHRD_IEEE802) {
988 dlink_type = htons(ETH_P_IPX);
989 datalink = pEII_datalink;
990 break;
991 }
992 /* fall through */
993 case IPX_FRAME_SNAP:
994 dlink_type = htons(ETH_P_SNAP);
995 datalink = pSNAP_datalink;
996 break;
997 case IPX_FRAME_8023:
998 dlink_type = htons(ETH_P_802_3);
999 datalink = p8023_datalink;
1000 break;
1001 case IPX_FRAME_NONE:
1002 default:
1003 rc = -EPROTONOSUPPORT;
1004 goto out_dev;
1005 }
1006
1007 rc = -ENETDOWN;
1008 if (!(dev->flags & IFF_UP))
1009 goto out_dev;
1010
1011 /* Check addresses are suitable */
1012 rc = -EINVAL;
1013 if (dev->addr_len > IPX_NODE_LEN)
1014 goto out_dev;
1015
1016 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1017 if (!intrfc) {
1018 /* Ok now create */
1019 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1020 datalink, 0, dev->hard_header_len +
1021 datalink->header_length);
1022 rc = -EAGAIN;
1023 if (!intrfc)
1024 goto out_dev;
1025 /* Setup primary if necessary */
1026 if (idef->ipx_special == IPX_PRIMARY)
1027 ipx_primary_net = intrfc;
1028 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1029 IPX_NODE_LEN)) {
1030 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1031 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1032 dev->dev_addr, dev->addr_len);
1033 } else
1034 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1035 ipxitf_hold(intrfc);
1036 ipxitf_insert(intrfc);
1037 }
1038
1039
1040 /* If the network number is known, add a route */
1041 rc = 0;
1042 if (!intrfc->if_netnum)
1043 goto out_intrfc;
1044
1045 rc = ipxitf_add_local_route(intrfc);
1046 out_intrfc:
1047 ipxitf_put(intrfc);
1048 goto out;
1049 out_dev:
1050 dev_put(dev);
1051 out:
1052 return rc;
1053 }
1054
1055 static int ipxitf_delete(struct ipx_interface_definition *idef)
1056 {
1057 struct net_device *dev = NULL;
1058 __be16 dlink_type = 0;
1059 struct ipx_interface *intrfc;
1060 int rc = 0;
1061
1062 spin_lock_bh(&ipx_interfaces_lock);
1063 if (idef->ipx_special == IPX_INTERNAL) {
1064 if (ipx_internal_net) {
1065 __ipxitf_put(ipx_internal_net);
1066 goto out;
1067 }
1068 rc = -ENOENT;
1069 goto out;
1070 }
1071
1072 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1073 rc = -EPROTONOSUPPORT;
1074 if (!dlink_type)
1075 goto out;
1076
1077 dev = __dev_get_by_name(&init_net, idef->ipx_device);
1078 rc = -ENODEV;
1079 if (!dev)
1080 goto out;
1081
1082 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1083 rc = -EINVAL;
1084 if (!intrfc)
1085 goto out;
1086 __ipxitf_put(intrfc);
1087
1088 rc = 0;
1089 out:
1090 spin_unlock_bh(&ipx_interfaces_lock);
1091 return rc;
1092 }
1093
1094 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1095 __be16 dlink_type)
1096 {
1097 struct ipx_interface *intrfc = NULL;
1098 struct datalink_proto *datalink;
1099
1100 if (!dev)
1101 goto out;
1102
1103 /* Check addresses are suitable */
1104 if (dev->addr_len > IPX_NODE_LEN)
1105 goto out;
1106
1107 switch (ntohs(dlink_type)) {
1108 case ETH_P_IPX: datalink = pEII_datalink; break;
1109 case ETH_P_802_2: datalink = p8022_datalink; break;
1110 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1111 case ETH_P_802_3: datalink = p8023_datalink; break;
1112 default: goto out;
1113 }
1114
1115 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1116 dev->hard_header_len + datalink->header_length);
1117
1118 if (intrfc) {
1119 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1120 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1121 dev->dev_addr, dev->addr_len);
1122 spin_lock_init(&intrfc->if_sklist_lock);
1123 atomic_set(&intrfc->refcnt, 1);
1124 ipxitf_insert(intrfc);
1125 dev_hold(dev);
1126 }
1127
1128 out:
1129 return intrfc;
1130 }
1131
1132 static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1133 {
1134 int rc = -EINVAL;
1135 struct ifreq ifr;
1136 int val;
1137
1138 switch (cmd) {
1139 case SIOCSIFADDR: {
1140 struct sockaddr_ipx *sipx;
1141 struct ipx_interface_definition f;
1142
1143 rc = -EFAULT;
1144 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1145 break;
1146 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1147 rc = -EINVAL;
1148 if (sipx->sipx_family != AF_IPX)
1149 break;
1150 f.ipx_network = sipx->sipx_network;
1151 memcpy(f.ipx_device, ifr.ifr_name,
1152 sizeof(f.ipx_device));
1153 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1154 f.ipx_dlink_type = sipx->sipx_type;
1155 f.ipx_special = sipx->sipx_special;
1156
1157 if (sipx->sipx_action == IPX_DLTITF)
1158 rc = ipxitf_delete(&f);
1159 else
1160 rc = ipxitf_create(&f);
1161 break;
1162 }
1163 case SIOCGIFADDR: {
1164 struct sockaddr_ipx *sipx;
1165 struct ipx_interface *ipxif;
1166 struct net_device *dev;
1167
1168 rc = -EFAULT;
1169 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1170 break;
1171 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1172 dev = __dev_get_by_name(&init_net, ifr.ifr_name);
1173 rc = -ENODEV;
1174 if (!dev)
1175 break;
1176 ipxif = ipxitf_find_using_phys(dev,
1177 ipx_map_frame_type(sipx->sipx_type));
1178 rc = -EADDRNOTAVAIL;
1179 if (!ipxif)
1180 break;
1181
1182 sipx->sipx_family = AF_IPX;
1183 sipx->sipx_network = ipxif->if_netnum;
1184 memcpy(sipx->sipx_node, ipxif->if_node,
1185 sizeof(sipx->sipx_node));
1186 rc = -EFAULT;
1187 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1188 break;
1189 ipxitf_put(ipxif);
1190 rc = 0;
1191 break;
1192 }
1193 case SIOCAIPXITFCRT:
1194 rc = -EFAULT;
1195 if (get_user(val, (unsigned char __user *) arg))
1196 break;
1197 rc = 0;
1198 ipxcfg_auto_create_interfaces = val;
1199 break;
1200 case SIOCAIPXPRISLT:
1201 rc = -EFAULT;
1202 if (get_user(val, (unsigned char __user *) arg))
1203 break;
1204 rc = 0;
1205 ipxcfg_set_auto_select(val);
1206 break;
1207 }
1208
1209 return rc;
1210 }
1211
1212 /*
1213 * Checksum routine for IPX
1214 */
1215
1216 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1217 /* This functions should *not* mess with packet contents */
1218
1219 __be16 ipx_cksum(struct ipxhdr *packet, int length)
1220 {
1221 /*
1222 * NOTE: sum is a net byte order quantity, which optimizes the
1223 * loop. This only works on big and little endian machines. (I
1224 * don't know of a machine that isn't.)
1225 */
1226 /* handle the first 3 words separately; checksum should be skipped
1227 * and ipx_tctrl masked out */
1228 __u16 *p = (__u16 *)packet;
1229 __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff));
1230 __u32 i = (length >> 1) - 3; /* Number of remaining complete words */
1231
1232 /* Loop through them */
1233 p += 3;
1234 while (i--)
1235 sum += *p++;
1236
1237 /* Add on the last part word if it exists */
1238 if (packet->ipx_pktsize & htons(1))
1239 sum += (__force u16)htons(0xff00) & *p;
1240
1241 /* Do final fixup */
1242 sum = (sum & 0xffff) + (sum >> 16);
1243
1244 /* It's a pity there's no concept of carry in C */
1245 if (sum >= 0x10000)
1246 sum++;
1247
1248 /*
1249 * Leave 0 alone; we don't want 0xffff here. Note that we can't get
1250 * here with 0x10000, so this check is the same as ((__u16)sum)
1251 */
1252 if (sum)
1253 sum = ~sum;
1254
1255 return (__force __be16)sum;
1256 }
1257
1258 const char *ipx_frame_name(__be16 frame)
1259 {
1260 char* rc = "None";
1261
1262 switch (ntohs(frame)) {
1263 case ETH_P_IPX: rc = "EtherII"; break;
1264 case ETH_P_802_2: rc = "802.2"; break;
1265 case ETH_P_SNAP: rc = "SNAP"; break;
1266 case ETH_P_802_3: rc = "802.3"; break;
1267 }
1268
1269 return rc;
1270 }
1271
1272 const char *ipx_device_name(struct ipx_interface *intrfc)
1273 {
1274 return intrfc->if_internal ? "Internal" :
1275 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1276 }
1277
1278 /* Handling for system calls applied via the various interfaces to an IPX
1279 * socket object. */
1280
1281 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1282 char __user *optval, unsigned int optlen)
1283 {
1284 struct sock *sk = sock->sk;
1285 int opt;
1286 int rc = -EINVAL;
1287
1288 lock_sock(sk);
1289 if (optlen != sizeof(int))
1290 goto out;
1291
1292 rc = -EFAULT;
1293 if (get_user(opt, (unsigned int __user *)optval))
1294 goto out;
1295
1296 rc = -ENOPROTOOPT;
1297 if (!(level == SOL_IPX && optname == IPX_TYPE))
1298 goto out;
1299
1300 ipx_sk(sk)->type = opt;
1301 rc = 0;
1302 out:
1303 release_sock(sk);
1304 return rc;
1305 }
1306
1307 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1308 char __user *optval, int __user *optlen)
1309 {
1310 struct sock *sk = sock->sk;
1311 int val = 0;
1312 int len;
1313 int rc = -ENOPROTOOPT;
1314
1315 lock_sock(sk);
1316 if (!(level == SOL_IPX && optname == IPX_TYPE))
1317 goto out;
1318
1319 val = ipx_sk(sk)->type;
1320
1321 rc = -EFAULT;
1322 if (get_user(len, optlen))
1323 goto out;
1324
1325 len = min_t(unsigned int, len, sizeof(int));
1326 rc = -EINVAL;
1327 if(len < 0)
1328 goto out;
1329
1330 rc = -EFAULT;
1331 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1332 goto out;
1333
1334 rc = 0;
1335 out:
1336 release_sock(sk);
1337 return rc;
1338 }
1339
1340 static struct proto ipx_proto = {
1341 .name = "IPX",
1342 .owner = THIS_MODULE,
1343 .obj_size = sizeof(struct ipx_sock),
1344 };
1345
1346 static int ipx_create(struct net *net, struct socket *sock, int protocol,
1347 int kern)
1348 {
1349 int rc = -ESOCKTNOSUPPORT;
1350 struct sock *sk;
1351
1352 if (!net_eq(net, &init_net))
1353 return -EAFNOSUPPORT;
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 rc = -ENOMEM;
1365 sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto);
1366 if (!sk)
1367 goto out;
1368
1369 sk_refcnt_debug_inc(sk);
1370 sock_init_data(sock, sk);
1371 sk->sk_no_check = 1; /* Checksum off by default */
1372 sock->ops = &ipx_dgram_ops;
1373 rc = 0;
1374 out:
1375 return rc;
1376 }
1377
1378 static int ipx_release(struct socket *sock)
1379 {
1380 struct sock *sk = sock->sk;
1381
1382 if (!sk)
1383 goto out;
1384
1385 lock_sock(sk);
1386 if (!sock_flag(sk, SOCK_DEAD))
1387 sk->sk_state_change(sk);
1388
1389 sock_set_flag(sk, SOCK_DEAD);
1390 sock->sk = NULL;
1391 sk_refcnt_debug_release(sk);
1392 ipx_destroy_socket(sk);
1393 release_sock(sk);
1394 sock_put(sk);
1395 out:
1396 return 0;
1397 }
1398
1399 /* caller must hold a reference to intrfc */
1400
1401 static __be16 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, htons(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 htons(socketNum);
1420 }
1421
1422 static int __ipx_bind(struct socket *sock,
1423 struct sockaddr *uaddr, int addr_len)
1424 {
1425 struct sock *sk = sock->sk;
1426 struct ipx_sock *ipxs = ipx_sk(sk);
1427 struct ipx_interface *intrfc;
1428 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1429 int rc = -EINVAL;
1430
1431 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1432 goto out;
1433
1434 intrfc = ipxitf_find_using_net(addr->sipx_network);
1435 rc = -EADDRNOTAVAIL;
1436 if (!intrfc)
1437 goto out;
1438
1439 if (!addr->sipx_port) {
1440 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1441 rc = -EINVAL;
1442 if (!addr->sipx_port)
1443 goto out_put;
1444 }
1445
1446 /* protect IPX system stuff like routing/sap */
1447 rc = -EACCES;
1448 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1449 !capable(CAP_NET_ADMIN))
1450 goto out_put;
1451
1452 ipxs->port = addr->sipx_port;
1453
1454 #ifdef CONFIG_IPX_INTERN
1455 if (intrfc == ipx_internal_net) {
1456 /* The source address is to be set explicitly if the
1457 * socket is to be bound on the internal network. If a
1458 * node number 0 was specified, the default is used.
1459 */
1460
1461 rc = -EINVAL;
1462 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1463 goto out_put;
1464 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1465 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1466 else
1467 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1468
1469 rc = -EADDRINUSE;
1470 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1471 ipxs->port)) {
1472 SOCK_DEBUG(sk,
1473 "IPX: bind failed because port %X in use.\n",
1474 ntohs(addr->sipx_port));
1475 goto out_put;
1476 }
1477 } else {
1478 /* Source addresses are easy. It must be our
1479 * network:node pair for an interface routed to IPX
1480 * with the ipx routing ioctl()
1481 */
1482
1483 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1484
1485 rc = -EADDRINUSE;
1486 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1487 SOCK_DEBUG(sk,
1488 "IPX: bind failed because port %X in use.\n",
1489 ntohs(addr->sipx_port));
1490 goto out_put;
1491 }
1492 }
1493
1494 #else /* !def CONFIG_IPX_INTERN */
1495
1496 /* Source addresses are easy. It must be our network:node pair for
1497 an interface routed to IPX with the ipx routing ioctl() */
1498
1499 rc = -EADDRINUSE;
1500 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1501 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1502 ntohs((int)addr->sipx_port));
1503 goto out_put;
1504 }
1505
1506 #endif /* CONFIG_IPX_INTERN */
1507
1508 ipxitf_insert_socket(intrfc, sk);
1509 sock_reset_flag(sk, SOCK_ZAPPED);
1510
1511 rc = 0;
1512 out_put:
1513 ipxitf_put(intrfc);
1514 out:
1515 return rc;
1516 }
1517
1518 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1519 {
1520 struct sock *sk = sock->sk;
1521 int rc;
1522
1523 lock_sock(sk);
1524 rc = __ipx_bind(sock, uaddr, addr_len);
1525 release_sock(sk);
1526
1527 return rc;
1528 }
1529
1530 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1531 int addr_len, int flags)
1532 {
1533 struct sock *sk = sock->sk;
1534 struct ipx_sock *ipxs = ipx_sk(sk);
1535 struct sockaddr_ipx *addr;
1536 int rc = -EINVAL;
1537 struct ipx_route *rt;
1538
1539 sk->sk_state = TCP_CLOSE;
1540 sock->state = SS_UNCONNECTED;
1541
1542 lock_sock(sk);
1543 if (addr_len != sizeof(*addr))
1544 goto out;
1545 addr = (struct sockaddr_ipx *)uaddr;
1546
1547 /* put the autobinding in */
1548 if (!ipxs->port) {
1549 struct sockaddr_ipx uaddr;
1550
1551 uaddr.sipx_port = 0;
1552 uaddr.sipx_network = 0;
1553
1554 #ifdef CONFIG_IPX_INTERN
1555 rc = -ENETDOWN;
1556 if (!ipxs->intrfc)
1557 goto out; /* Someone zonked the iface */
1558 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1559 IPX_NODE_LEN);
1560 #endif /* CONFIG_IPX_INTERN */
1561
1562 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1563 sizeof(struct sockaddr_ipx));
1564 if (rc)
1565 goto out;
1566 }
1567
1568 /* We can either connect to primary network or somewhere
1569 * we can route to */
1570 rt = ipxrtr_lookup(addr->sipx_network);
1571 rc = -ENETUNREACH;
1572 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1573 goto out;
1574
1575 ipxs->dest_addr.net = addr->sipx_network;
1576 ipxs->dest_addr.sock = addr->sipx_port;
1577 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1578 ipxs->type = addr->sipx_type;
1579
1580 if (sock->type == SOCK_DGRAM) {
1581 sock->state = SS_CONNECTED;
1582 sk->sk_state = TCP_ESTABLISHED;
1583 }
1584
1585 if (rt)
1586 ipxrtr_put(rt);
1587 rc = 0;
1588 out:
1589 release_sock(sk);
1590 return rc;
1591 }
1592
1593
1594 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1595 int *uaddr_len, int peer)
1596 {
1597 struct ipx_address *addr;
1598 struct sockaddr_ipx sipx;
1599 struct sock *sk = sock->sk;
1600 struct ipx_sock *ipxs = ipx_sk(sk);
1601 int rc;
1602
1603 *uaddr_len = sizeof(struct sockaddr_ipx);
1604
1605 lock_sock(sk);
1606 if (peer) {
1607 rc = -ENOTCONN;
1608 if (sk->sk_state != TCP_ESTABLISHED)
1609 goto out;
1610
1611 addr = &ipxs->dest_addr;
1612 sipx.sipx_network = addr->net;
1613 sipx.sipx_port = addr->sock;
1614 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1615 } else {
1616 if (ipxs->intrfc) {
1617 sipx.sipx_network = ipxs->intrfc->if_netnum;
1618 #ifdef CONFIG_IPX_INTERN
1619 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1620 #else
1621 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1622 IPX_NODE_LEN);
1623 #endif /* CONFIG_IPX_INTERN */
1624
1625 } else {
1626 sipx.sipx_network = 0;
1627 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1628 }
1629
1630 sipx.sipx_port = ipxs->port;
1631 }
1632
1633 sipx.sipx_family = AF_IPX;
1634 sipx.sipx_type = ipxs->type;
1635 sipx.sipx_zero = 0;
1636 memcpy(uaddr, &sipx, sizeof(sipx));
1637
1638 rc = 0;
1639 out:
1640 release_sock(sk);
1641 return rc;
1642 }
1643
1644 static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1645 {
1646 /* NULL here for pt means the packet was looped back */
1647 struct ipx_interface *intrfc;
1648 struct ipxhdr *ipx;
1649 u16 ipx_pktsize;
1650 int rc = 0;
1651
1652 if (!net_eq(dev_net(dev), &init_net))
1653 goto drop;
1654
1655 /* Not ours */
1656 if (skb->pkt_type == PACKET_OTHERHOST)
1657 goto drop;
1658
1659 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1660 goto out;
1661
1662 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1663 goto drop;
1664
1665 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
1666
1667 /* Too small or invalid header? */
1668 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1669 !pskb_may_pull(skb, ipx_pktsize))
1670 goto drop;
1671
1672 ipx = ipx_hdr(skb);
1673 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1674 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1675 goto drop;
1676
1677 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1678 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1679 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1680
1681 /* Determine what local ipx endpoint this is */
1682 intrfc = ipxitf_find_using_phys(dev, pt->type);
1683 if (!intrfc) {
1684 if (ipxcfg_auto_create_interfaces &&
1685 IPX_SKB_CB(skb)->ipx_dest_net) {
1686 intrfc = ipxitf_auto_create(dev, pt->type);
1687 if (intrfc)
1688 ipxitf_hold(intrfc);
1689 }
1690
1691 if (!intrfc) /* Not one of ours */
1692 /* or invalid packet for auto creation */
1693 goto drop;
1694 }
1695
1696 rc = ipxitf_rcv(intrfc, skb);
1697 ipxitf_put(intrfc);
1698 goto out;
1699 drop:
1700 kfree_skb(skb);
1701 out:
1702 return rc;
1703 }
1704
1705 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1706 struct msghdr *msg, size_t len)
1707 {
1708 struct sock *sk = sock->sk;
1709 struct ipx_sock *ipxs = ipx_sk(sk);
1710 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1711 struct sockaddr_ipx local_sipx;
1712 int rc = -EINVAL;
1713 int flags = msg->msg_flags;
1714
1715 lock_sock(sk);
1716 /* Socket gets bound below anyway */
1717 /* if (sk->sk_zapped)
1718 return -EIO; */ /* Socket not bound */
1719 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1720 goto out;
1721
1722 /* Max possible packet size limited by 16 bit pktsize in header */
1723 if (len >= 65535 - sizeof(struct ipxhdr))
1724 goto out;
1725
1726 if (usipx) {
1727 if (!ipxs->port) {
1728 struct sockaddr_ipx uaddr;
1729
1730 uaddr.sipx_port = 0;
1731 uaddr.sipx_network = 0;
1732 #ifdef CONFIG_IPX_INTERN
1733 rc = -ENETDOWN;
1734 if (!ipxs->intrfc)
1735 goto out; /* Someone zonked the iface */
1736 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1737 IPX_NODE_LEN);
1738 #endif
1739 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1740 sizeof(struct sockaddr_ipx));
1741 if (rc)
1742 goto out;
1743 }
1744
1745 rc = -EINVAL;
1746 if (msg->msg_namelen < sizeof(*usipx) ||
1747 usipx->sipx_family != AF_IPX)
1748 goto out;
1749 } else {
1750 rc = -ENOTCONN;
1751 if (sk->sk_state != TCP_ESTABLISHED)
1752 goto out;
1753
1754 usipx = &local_sipx;
1755 usipx->sipx_family = AF_IPX;
1756 usipx->sipx_type = ipxs->type;
1757 usipx->sipx_port = ipxs->dest_addr.sock;
1758 usipx->sipx_network = ipxs->dest_addr.net;
1759 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1760 }
1761
1762 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1763 flags & MSG_DONTWAIT);
1764 if (rc >= 0)
1765 rc = len;
1766 out:
1767 release_sock(sk);
1768 return rc;
1769 }
1770
1771
1772 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1773 struct msghdr *msg, size_t size, int flags)
1774 {
1775 struct sock *sk = sock->sk;
1776 struct ipx_sock *ipxs = ipx_sk(sk);
1777 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1778 struct ipxhdr *ipx = NULL;
1779 struct sk_buff *skb;
1780 int copied, rc;
1781
1782 lock_sock(sk);
1783 /* put the autobinding in */
1784 if (!ipxs->port) {
1785 struct sockaddr_ipx uaddr;
1786
1787 uaddr.sipx_port = 0;
1788 uaddr.sipx_network = 0;
1789
1790 #ifdef CONFIG_IPX_INTERN
1791 rc = -ENETDOWN;
1792 if (!ipxs->intrfc)
1793 goto out; /* Someone zonked the iface */
1794 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1795 #endif /* CONFIG_IPX_INTERN */
1796
1797 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1798 sizeof(struct sockaddr_ipx));
1799 if (rc)
1800 goto out;
1801 }
1802
1803 rc = -ENOTCONN;
1804 if (sock_flag(sk, SOCK_ZAPPED))
1805 goto out;
1806
1807 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1808 flags & MSG_DONTWAIT, &rc);
1809 if (!skb)
1810 goto out;
1811
1812 ipx = ipx_hdr(skb);
1813 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1814 if (copied > size) {
1815 copied = size;
1816 msg->msg_flags |= MSG_TRUNC;
1817 }
1818
1819 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1820 copied);
1821 if (rc)
1822 goto out_free;
1823 if (skb->tstamp.tv64)
1824 sk->sk_stamp = skb->tstamp;
1825
1826 msg->msg_namelen = sizeof(*sipx);
1827
1828 if (sipx) {
1829 sipx->sipx_family = AF_IPX;
1830 sipx->sipx_port = ipx->ipx_source.sock;
1831 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1832 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1833 sipx->sipx_type = ipx->ipx_type;
1834 sipx->sipx_zero = 0;
1835 }
1836 rc = copied;
1837
1838 out_free:
1839 skb_free_datagram(sk, skb);
1840 out:
1841 release_sock(sk);
1842 return rc;
1843 }
1844
1845
1846 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1847 {
1848 int rc = 0;
1849 long amount = 0;
1850 struct sock *sk = sock->sk;
1851 void __user *argp = (void __user *)arg;
1852
1853 lock_sock(sk);
1854 switch (cmd) {
1855 case TIOCOUTQ:
1856 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1857 if (amount < 0)
1858 amount = 0;
1859 rc = put_user(amount, (int __user *)argp);
1860 break;
1861 case TIOCINQ: {
1862 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1863 /* These two are safe on a single CPU system as only
1864 * user tasks fiddle here */
1865 if (skb)
1866 amount = skb->len - sizeof(struct ipxhdr);
1867 rc = put_user(amount, (int __user *)argp);
1868 break;
1869 }
1870 case SIOCADDRT:
1871 case SIOCDELRT:
1872 rc = -EPERM;
1873 if (capable(CAP_NET_ADMIN))
1874 rc = ipxrtr_ioctl(cmd, argp);
1875 break;
1876 case SIOCSIFADDR:
1877 case SIOCAIPXITFCRT:
1878 case SIOCAIPXPRISLT:
1879 rc = -EPERM;
1880 if (!capable(CAP_NET_ADMIN))
1881 break;
1882 case SIOCGIFADDR:
1883 rc = ipxitf_ioctl(cmd, argp);
1884 break;
1885 case SIOCIPXCFGDATA:
1886 rc = ipxcfg_get_config_data(argp);
1887 break;
1888 case SIOCIPXNCPCONN:
1889 /*
1890 * This socket wants to take care of the NCP connection
1891 * handed to us in arg.
1892 */
1893 rc = -EPERM;
1894 if (!capable(CAP_NET_ADMIN))
1895 break;
1896 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1897 (const unsigned short __user *)argp);
1898 break;
1899 case SIOCGSTAMP:
1900 rc = sock_get_timestamp(sk, argp);
1901 break;
1902 case SIOCGIFDSTADDR:
1903 case SIOCSIFDSTADDR:
1904 case SIOCGIFBRDADDR:
1905 case SIOCSIFBRDADDR:
1906 case SIOCGIFNETMASK:
1907 case SIOCSIFNETMASK:
1908 rc = -EINVAL;
1909 break;
1910 default:
1911 rc = -ENOIOCTLCMD;
1912 break;
1913 }
1914 release_sock(sk);
1915
1916 return rc;
1917 }
1918
1919
1920 #ifdef CONFIG_COMPAT
1921 static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1922 {
1923 /*
1924 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1925 * commands is handled by generic ioctl code. As these commands are
1926 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1927 * code.
1928 */
1929 switch (cmd) {
1930 case SIOCAIPXITFCRT:
1931 case SIOCAIPXPRISLT:
1932 case SIOCIPXCFGDATA:
1933 case SIOCIPXNCPCONN:
1934 return ipx_ioctl(sock, cmd, arg);
1935 default:
1936 return -ENOIOCTLCMD;
1937 }
1938 }
1939 #endif
1940
1941
1942 /*
1943 * Socket family declarations
1944 */
1945
1946 static const struct net_proto_family ipx_family_ops = {
1947 .family = PF_IPX,
1948 .create = ipx_create,
1949 .owner = THIS_MODULE,
1950 };
1951
1952 static const struct proto_ops ipx_dgram_ops = {
1953 .family = PF_IPX,
1954 .owner = THIS_MODULE,
1955 .release = ipx_release,
1956 .bind = ipx_bind,
1957 .connect = ipx_connect,
1958 .socketpair = sock_no_socketpair,
1959 .accept = sock_no_accept,
1960 .getname = ipx_getname,
1961 .poll = datagram_poll,
1962 .ioctl = ipx_ioctl,
1963 #ifdef CONFIG_COMPAT
1964 .compat_ioctl = ipx_compat_ioctl,
1965 #endif
1966 .listen = sock_no_listen,
1967 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1968 .setsockopt = ipx_setsockopt,
1969 .getsockopt = ipx_getsockopt,
1970 .sendmsg = ipx_sendmsg,
1971 .recvmsg = ipx_recvmsg,
1972 .mmap = sock_no_mmap,
1973 .sendpage = sock_no_sendpage,
1974 };
1975
1976 static struct packet_type ipx_8023_packet_type __read_mostly = {
1977 .type = cpu_to_be16(ETH_P_802_3),
1978 .func = ipx_rcv,
1979 };
1980
1981 static struct packet_type ipx_dix_packet_type __read_mostly = {
1982 .type = cpu_to_be16(ETH_P_IPX),
1983 .func = ipx_rcv,
1984 };
1985
1986 static struct notifier_block ipx_dev_notifier = {
1987 .notifier_call = ipxitf_device_event,
1988 };
1989
1990 extern struct datalink_proto *make_EII_client(void);
1991 extern void destroy_EII_client(struct datalink_proto *);
1992
1993 static const unsigned char ipx_8022_type = 0xE0;
1994 static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1995 static const char ipx_EII_err_msg[] __initconst =
1996 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1997 static const char ipx_8023_err_msg[] __initconst =
1998 KERN_CRIT "IPX: Unable to register with 802.3\n";
1999 static const char ipx_llc_err_msg[] __initconst =
2000 KERN_CRIT "IPX: Unable to register with 802.2\n";
2001 static const char ipx_snap_err_msg[] __initconst =
2002 KERN_CRIT "IPX: Unable to register with SNAP\n";
2003
2004 static int __init ipx_init(void)
2005 {
2006 int rc = proto_register(&ipx_proto, 1);
2007
2008 if (rc != 0)
2009 goto out;
2010
2011 sock_register(&ipx_family_ops);
2012
2013 pEII_datalink = make_EII_client();
2014 if (pEII_datalink)
2015 dev_add_pack(&ipx_dix_packet_type);
2016 else
2017 printk(ipx_EII_err_msg);
2018
2019 p8023_datalink = make_8023_client();
2020 if (p8023_datalink)
2021 dev_add_pack(&ipx_8023_packet_type);
2022 else
2023 printk(ipx_8023_err_msg);
2024
2025 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2026 if (!p8022_datalink)
2027 printk(ipx_llc_err_msg);
2028
2029 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2030 if (!pSNAP_datalink)
2031 printk(ipx_snap_err_msg);
2032
2033 register_netdevice_notifier(&ipx_dev_notifier);
2034 ipx_register_sysctl();
2035 ipx_proc_init();
2036 out:
2037 return rc;
2038 }
2039
2040 static void __exit ipx_proto_finito(void)
2041 {
2042 ipx_proc_exit();
2043 ipx_unregister_sysctl();
2044
2045 unregister_netdevice_notifier(&ipx_dev_notifier);
2046
2047 ipxitf_cleanup();
2048
2049 if (pSNAP_datalink) {
2050 unregister_snap_client(pSNAP_datalink);
2051 pSNAP_datalink = NULL;
2052 }
2053
2054 if (p8022_datalink) {
2055 unregister_8022_client(p8022_datalink);
2056 p8022_datalink = NULL;
2057 }
2058
2059 dev_remove_pack(&ipx_8023_packet_type);
2060 if (p8023_datalink) {
2061 destroy_8023_client(p8023_datalink);
2062 p8023_datalink = NULL;
2063 }
2064
2065 dev_remove_pack(&ipx_dix_packet_type);
2066 if (pEII_datalink) {
2067 destroy_EII_client(pEII_datalink);
2068 pEII_datalink = NULL;
2069 }
2070
2071 proto_unregister(&ipx_proto);
2072 sock_unregister(ipx_family_ops.family);
2073 }
2074
2075 module_init(ipx_init);
2076 module_exit(ipx_proto_finito);
2077 MODULE_LICENSE("GPL");
2078 MODULE_ALIAS_NETPROTO(PF_IPX);
Linus' kernel tree