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[libata sata_promise] Add PATA cable detection.
[linux-2.6.22.y-op.git] / net / ipx / af_ipx.c
blob811d998725bc6728bec208ad90ef81157f8235a0
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/capability.h>
33 #include <linux/errno.h>
34 #include <linux/if_arp.h>
35 #include <linux/if_ether.h>
36 #include <linux/init.h>
37 #include <linux/ipx.h>
38 #include <linux/kernel.h>
39 #include <linux/list.h>
40 #include <linux/module.h>
41 #include <linux/net.h>
42 #include <linux/netdevice.h>
43 #include <linux/uio.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(__u32 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, int len, int noblock);
92 extern int ipxrtr_route_skb(struct sk_buff *skb);
93 extern struct ipx_route *ipxrtr_lookup(__u32 net);
94 extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
95
96 #undef IPX_REFCNT_DEBUG
97 #ifdef IPX_REFCNT_DEBUG
98 atomic_t ipx_sock_nr;
99 #endif
100
101 struct ipx_interface *ipx_interfaces_head(void)
102 {
103 struct ipx_interface *rc = NULL;
104
105 if (!list_empty(&ipx_interfaces))
106 rc = list_entry(ipx_interfaces.next,
107 struct ipx_interface, node);
108 return rc;
109 }
110
111 static void ipxcfg_set_auto_select(char val)
112 {
113 ipxcfg_auto_select_primary = val;
114 if (val && !ipx_primary_net)
115 ipx_primary_net = ipx_interfaces_head();
116 }
117
118 static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
119 {
120 struct ipx_config_data vals;
121
122 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
123 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
124
125 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
126 }
127
128 /*
129 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
130 * handler using this technique. They can be added although we do not
131 * use this facility.
132 */
133
134 static void ipx_remove_socket(struct sock *sk)
135 {
136 /* Determine interface with which socket is associated */
137 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
138
139 if (!intrfc)
140 goto out;
141
142 ipxitf_hold(intrfc);
143 spin_lock_bh(&intrfc->if_sklist_lock);
144 sk_del_node_init(sk);
145 spin_unlock_bh(&intrfc->if_sklist_lock);
146 ipxitf_put(intrfc);
147 out:
148 return;
149 }
150
151 static void ipx_destroy_socket(struct sock *sk)
152 {
153 ipx_remove_socket(sk);
154 skb_queue_purge(&sk->sk_receive_queue);
155 #ifdef IPX_REFCNT_DEBUG
156 atomic_dec(&ipx_sock_nr);
157 printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk,
158 atomic_read(&ipx_sock_nr));
159 if (atomic_read(&sk->sk_refcnt) != 1)
160 printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n",
161 sk, atomic_read(&sk->sk_refcnt));
162 #endif
163 sock_put(sk);
164 }
165
166 /*
167 * The following code is used to support IPX Interfaces (IPXITF). An
168 * IPX interface is defined by a physical device and a frame type.
169 */
170
171 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
172
173 static void ipxitf_clear_primary_net(void)
174 {
175 ipx_primary_net = NULL;
176 if (ipxcfg_auto_select_primary)
177 ipx_primary_net = ipx_interfaces_head();
178 }
179
180 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
181 unsigned short datalink)
182 {
183 struct ipx_interface *i;
184
185 list_for_each_entry(i, &ipx_interfaces, node)
186 if (i->if_dev == dev && i->if_dlink_type == datalink)
187 goto out;
188 i = NULL;
189 out:
190 return i;
191 }
192
193 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
194 unsigned short datalink)
195 {
196 struct ipx_interface *i;
197
198 spin_lock_bh(&ipx_interfaces_lock);
199 i = __ipxitf_find_using_phys(dev, datalink);
200 if (i)
201 ipxitf_hold(i);
202 spin_unlock_bh(&ipx_interfaces_lock);
203 return i;
204 }
205
206 struct ipx_interface *ipxitf_find_using_net(__u32 net)
207 {
208 struct ipx_interface *i;
209
210 spin_lock_bh(&ipx_interfaces_lock);
211 if (net) {
212 list_for_each_entry(i, &ipx_interfaces, node)
213 if (i->if_netnum == net)
214 goto hold;
215 i = NULL;
216 goto unlock;
217 }
218
219 i = ipx_primary_net;
220 if (i)
221 hold:
222 ipxitf_hold(i);
223 unlock:
224 spin_unlock_bh(&ipx_interfaces_lock);
225 return i;
226 }
227
228 /* Sockets are bound to a particular IPX interface. */
229 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
230 {
231 ipxitf_hold(intrfc);
232 spin_lock_bh(&intrfc->if_sklist_lock);
233 ipx_sk(sk)->intrfc = intrfc;
234 sk_add_node(sk, &intrfc->if_sklist);
235 spin_unlock_bh(&intrfc->if_sklist_lock);
236 ipxitf_put(intrfc);
237 }
238
239 /* caller must hold intrfc->if_sklist_lock */
240 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
241 unsigned short port)
242 {
243 struct sock *s;
244 struct hlist_node *node;
245
246 sk_for_each(s, node, &intrfc->if_sklist)
247 if (ipx_sk(s)->port == port)
248 goto found;
249 s = NULL;
250 found:
251 return s;
252 }
253
254 /* caller must hold a reference to intrfc */
255 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
256 unsigned short port)
257 {
258 struct sock *s;
259
260 spin_lock_bh(&intrfc->if_sklist_lock);
261 s = __ipxitf_find_socket(intrfc, port);
262 if (s)
263 sock_hold(s);
264 spin_unlock_bh(&intrfc->if_sklist_lock);
265
266 return s;
267 }
268
269 #ifdef CONFIG_IPX_INTERN
270 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
271 unsigned char *ipx_node,
272 unsigned short port)
273 {
274 struct sock *s;
275 struct hlist_node *node;
276
277 ipxitf_hold(intrfc);
278 spin_lock_bh(&intrfc->if_sklist_lock);
279
280 sk_for_each(s, node, &intrfc->if_sklist) {
281 struct ipx_sock *ipxs = ipx_sk(s);
282
283 if (ipxs->port == port &&
284 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
285 goto found;
286 }
287 s = NULL;
288 found:
289 spin_unlock_bh(&intrfc->if_sklist_lock);
290 ipxitf_put(intrfc);
291 return s;
292 }
293 #endif
294
295 static void __ipxitf_down(struct ipx_interface *intrfc)
296 {
297 struct sock *s;
298 struct hlist_node *node, *t;
299
300 /* Delete all routes associated with this interface */
301 ipxrtr_del_routes(intrfc);
302
303 spin_lock_bh(&intrfc->if_sklist_lock);
304 /* error sockets */
305 sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
306 struct ipx_sock *ipxs = ipx_sk(s);
307
308 s->sk_err = ENOLINK;
309 s->sk_error_report(s);
310 ipxs->intrfc = NULL;
311 ipxs->port = 0;
312 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
313 sk_del_node_init(s);
314 }
315 INIT_HLIST_HEAD(&intrfc->if_sklist);
316 spin_unlock_bh(&intrfc->if_sklist_lock);
317
318 /* remove this interface from list */
319 list_del(&intrfc->node);
320
321 /* remove this interface from *special* networks */
322 if (intrfc == ipx_primary_net)
323 ipxitf_clear_primary_net();
324 if (intrfc == ipx_internal_net)
325 ipx_internal_net = NULL;
326
327 if (intrfc->if_dev)
328 dev_put(intrfc->if_dev);
329 kfree(intrfc);
330 }
331
332 void ipxitf_down(struct ipx_interface *intrfc)
333 {
334 spin_lock_bh(&ipx_interfaces_lock);
335 __ipxitf_down(intrfc);
336 spin_unlock_bh(&ipx_interfaces_lock);
337 }
338
339 static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
340 {
341 if (atomic_dec_and_test(&intrfc->refcnt))
342 __ipxitf_down(intrfc);
343 }
344
345 static int ipxitf_device_event(struct notifier_block *notifier,
346 unsigned long event, void *ptr)
347 {
348 struct net_device *dev = ptr;
349 struct ipx_interface *i, *tmp;
350
351 if (event != NETDEV_DOWN && event != NETDEV_UP)
352 goto out;
353
354 spin_lock_bh(&ipx_interfaces_lock);
355 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
356 if (i->if_dev == dev) {
357 if (event == NETDEV_UP)
358 ipxitf_hold(i);
359 else
360 __ipxitf_put(i);
361 }
362 spin_unlock_bh(&ipx_interfaces_lock);
363 out:
364 return NOTIFY_DONE;
365 }
366
367
368 static __exit void ipxitf_cleanup(void)
369 {
370 struct ipx_interface *i, *tmp;
371
372 spin_lock_bh(&ipx_interfaces_lock);
373 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
374 __ipxitf_put(i);
375 spin_unlock_bh(&ipx_interfaces_lock);
376 }
377
378 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
379 {
380 if (sock_queue_rcv_skb(sock, skb) < 0)
381 kfree_skb(skb);
382 }
383
384 /*
385 * On input skb->sk is NULL. Nobody is charged for the memory.
386 */
387
388 /* caller must hold a reference to intrfc */
389
390 #ifdef CONFIG_IPX_INTERN
391 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
392 struct sk_buff *skb, int copy)
393 {
394 struct ipxhdr *ipx = ipx_hdr(skb);
395 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
396 IPX_NODE_LEN);
397 struct sock *s;
398 struct hlist_node *node;
399 int rc;
400
401 spin_lock_bh(&intrfc->if_sklist_lock);
402
403 sk_for_each(s, node, &intrfc->if_sklist) {
404 struct ipx_sock *ipxs = ipx_sk(s);
405
406 if (ipxs->port == ipx->ipx_dest.sock &&
407 (is_broadcast || !memcmp(ipx->ipx_dest.node,
408 ipxs->node, IPX_NODE_LEN))) {
409 /* We found a socket to which to send */
410 struct sk_buff *skb1;
411
412 if (copy) {
413 skb1 = skb_clone(skb, GFP_ATOMIC);
414 rc = -ENOMEM;
415 if (!skb1)
416 goto out;
417 } else {
418 skb1 = skb;
419 copy = 1; /* skb may only be used once */
420 }
421 ipxitf_def_skb_handler(s, skb1);
422
423 /* On an external interface, one socket can listen */
424 if (intrfc != ipx_internal_net)
425 break;
426 }
427 }
428
429 /* skb was solely for us, and we did not make a copy, so free it. */
430 if (!copy)
431 kfree_skb(skb);
432
433 rc = 0;
434 out:
435 spin_unlock_bh(&intrfc->if_sklist_lock);
436 return rc;
437 }
438 #else
439 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
440 struct ipxhdr *ipx)
441 {
442 /* The packet's target is a NCP connection handler. We want to hand it
443 * to the correct socket directly within the kernel, so that the
444 * mars_nwe packet distribution process does not have to do it. Here we
445 * only care about NCP and BURST packets.
446 *
447 * You might call this a hack, but believe me, you do not want a
448 * complete NCP layer in the kernel, and this is VERY fast as well. */
449 struct sock *sk = NULL;
450 int connection = 0;
451 u8 *ncphdr = (u8 *)(ipx + 1);
452
453 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
454 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
455 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
456 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
457
458 if (connection) {
459 struct hlist_node *node;
460 /* Now we have to look for a special NCP connection handling
461 * socket. Only these sockets have ipx_ncp_conn != 0, set by
462 * SIOCIPXNCPCONN. */
463 spin_lock_bh(&intrfc->if_sklist_lock);
464 sk_for_each(sk, node, &intrfc->if_sklist)
465 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
466 sock_hold(sk);
467 goto found;
468 }
469 sk = NULL;
470 found:
471 spin_unlock_bh(&intrfc->if_sklist_lock);
472 }
473 return sk;
474 }
475
476 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
477 struct sk_buff *skb, int copy)
478 {
479 struct ipxhdr *ipx = ipx_hdr(skb);
480 struct sock *sock1 = NULL, *sock2 = NULL;
481 struct sk_buff *skb1 = NULL, *skb2 = NULL;
482 int rc;
483
484 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
485 sock1 = ncp_connection_hack(intrfc, ipx);
486 if (!sock1)
487 /* No special socket found, forward the packet the normal way */
488 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
489
490 /*
491 * We need to check if there is a primary net and if
492 * this is addressed to one of the *SPECIAL* sockets because
493 * these need to be propagated to the primary net.
494 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
495 * 0x456(Diagnostic).
496 */
497
498 if (ipx_primary_net && intrfc != ipx_primary_net) {
499 const int dsock = ntohs(ipx->ipx_dest.sock);
500
501 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
502 /* The appropriate thing to do here is to dup the
503 * packet and route to the primary net interface via
504 * ipxitf_send; however, we'll cheat and just demux it
505 * here. */
506 sock2 = ipxitf_find_socket(ipx_primary_net,
507 ipx->ipx_dest.sock);
508 }
509
510 /*
511 * If there is nothing to do return. The kfree will cancel any charging.
512 */
513 rc = 0;
514 if (!sock1 && !sock2) {
515 if (!copy)
516 kfree_skb(skb);
517 goto out;
518 }
519
520 /*
521 * This next segment of code is a little awkward, but it sets it up
522 * so that the appropriate number of copies of the SKB are made and
523 * that skb1 and skb2 point to it (them) so that it (they) can be
524 * demuxed to sock1 and/or sock2. If we are unable to make enough
525 * copies, we do as much as is possible.
526 */
527
528 if (copy)
529 skb1 = skb_clone(skb, GFP_ATOMIC);
530 else
531 skb1 = skb;
532
533 rc = -ENOMEM;
534 if (!skb1)
535 goto out_put;
536
537 /* Do we need 2 SKBs? */
538 if (sock1 && sock2)
539 skb2 = skb_clone(skb1, GFP_ATOMIC);
540 else
541 skb2 = skb1;
542
543 if (sock1)
544 ipxitf_def_skb_handler(sock1, skb1);
545
546 if (!skb2)
547 goto out_put;
548
549 if (sock2)
550 ipxitf_def_skb_handler(sock2, skb2);
551
552 rc = 0;
553 out_put:
554 if (sock1)
555 sock_put(sock1);
556 if (sock2)
557 sock_put(sock2);
558 out:
559 return rc;
560 }
561 #endif /* CONFIG_IPX_INTERN */
562
563 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
564 struct sk_buff *skb)
565 {
566 struct sk_buff *skb2;
567 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
568 int out_offset = intrfc->if_ipx_offset;
569 int len;
570
571 /* Hopefully, most cases */
572 if (in_offset >= out_offset)
573 return skb;
574
575 /* Need new SKB */
576 len = skb->len + out_offset;
577 skb2 = alloc_skb(len, GFP_ATOMIC);
578 if (skb2) {
579 skb_reserve(skb2, out_offset);
580 skb2->nh.raw = skb2->h.raw = skb_put(skb2, skb->len);
581 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
582 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
583 }
584 kfree_skb(skb);
585 return skb2;
586 }
587
588 /* caller must hold a reference to intrfc and the skb has to be unshared */
589 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
590 {
591 struct ipxhdr *ipx = ipx_hdr(skb);
592 struct net_device *dev = intrfc->if_dev;
593 struct datalink_proto *dl = intrfc->if_dlink;
594 char dest_node[IPX_NODE_LEN];
595 int send_to_wire = 1;
596 int addr_len;
597
598 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
599 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
600 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
601
602 /* see if we need to include the netnum in the route list */
603 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
604 u32 *last_hop = (u32 *)(((u8 *) skb->data) +
605 sizeof(struct ipxhdr) +
606 IPX_SKB_CB(skb)->last_hop.index *
607 sizeof(u32));
608 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
609 IPX_SKB_CB(skb)->last_hop.index = -1;
610 }
611
612 /*
613 * We need to know how many skbuffs it will take to send out this
614 * packet to avoid unnecessary copies.
615 */
616
617 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
618 send_to_wire = 0; /* No non looped */
619
620 /*
621 * See if this should be demuxed to sockets on this interface
622 *
623 * We want to ensure the original was eaten or that we only use
624 * up clones.
625 */
626
627 if (ipx->ipx_dest.net == intrfc->if_netnum) {
628 /*
629 * To our own node, loop and free the original.
630 * The internal net will receive on all node address.
631 */
632 if (intrfc == ipx_internal_net ||
633 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
634 /* Don't charge sender */
635 skb_orphan(skb);
636
637 /* Will charge receiver */
638 return ipxitf_demux_socket(intrfc, skb, 0);
639 }
640
641 /* Broadcast, loop and possibly keep to send on. */
642 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
643 if (!send_to_wire)
644 skb_orphan(skb);
645 ipxitf_demux_socket(intrfc, skb, send_to_wire);
646 if (!send_to_wire)
647 goto out;
648 }
649 }
650
651 /*
652 * If the originating net is not equal to our net; this is routed
653 * We are still charging the sender. Which is right - the driver
654 * free will handle this fairly.
655 */
656 if (ipx->ipx_source.net != intrfc->if_netnum) {
657 /*
658 * Unshare the buffer before modifying the count in
659 * case it's a flood or tcpdump
660 */
661 skb = skb_unshare(skb, GFP_ATOMIC);
662 if (!skb)
663 goto out;
664 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
665 send_to_wire = 0;
666 }
667
668 if (!send_to_wire) {
669 kfree_skb(skb);
670 goto out;
671 }
672
673 /* Determine the appropriate hardware address */
674 addr_len = dev->addr_len;
675 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
676 memcpy(dest_node, dev->broadcast, addr_len);
677 else
678 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
679
680 /* Make any compensation for differing physical/data link size */
681 skb = ipxitf_adjust_skbuff(intrfc, skb);
682 if (!skb)
683 goto out;
684
685 /* set up data link and physical headers */
686 skb->dev = dev;
687 skb->protocol = htons(ETH_P_IPX);
688
689 /* Send it out */
690 dl->request(dl, skb, dest_node);
691 out:
692 return 0;
693 }
694
695 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
696 {
697 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
698 }
699
700 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
701 struct sk_buff *skb);
702 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
703
704 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
705 {
706 struct ipxhdr *ipx = ipx_hdr(skb);
707 int rc = 0;
708
709 ipxitf_hold(intrfc);
710
711 /* See if we should update our network number */
712 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
713 ipxitf_discover_netnum(intrfc, skb);
714
715 IPX_SKB_CB(skb)->last_hop.index = -1;
716 if (ipx->ipx_type == IPX_TYPE_PPROP) {
717 rc = ipxitf_pprop(intrfc, skb);
718 if (rc)
719 goto out_free_skb;
720 }
721
722 /* local processing follows */
723 if (!IPX_SKB_CB(skb)->ipx_dest_net)
724 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
725 if (!IPX_SKB_CB(skb)->ipx_source_net)
726 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
727
728 /* it doesn't make sense to route a pprop packet, there's no meaning
729 * in the ipx_dest_net for such packets */
730 if (ipx->ipx_type != IPX_TYPE_PPROP &&
731 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
732 /* We only route point-to-point packets. */
733 if (skb->pkt_type == PACKET_HOST) {
734 skb = skb_unshare(skb, GFP_ATOMIC);
735 if (skb)
736 rc = ipxrtr_route_skb(skb);
737 goto out_intrfc;
738 }
739
740 goto out_free_skb;
741 }
742
743 /* see if we should keep it */
744 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
745 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
746 rc = ipxitf_demux_socket(intrfc, skb, 0);
747 goto out_intrfc;
748 }
749
750 /* we couldn't pawn it off so unload it */
751 out_free_skb:
752 kfree_skb(skb);
753 out_intrfc:
754 ipxitf_put(intrfc);
755 return rc;
756 }
757
758 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
759 struct sk_buff *skb)
760 {
761 const struct ipx_cb *cb = IPX_SKB_CB(skb);
762
763 /* see if this is an intra packet: source_net == dest_net */
764 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
765 struct ipx_interface *i =
766 ipxitf_find_using_net(cb->ipx_source_net);
767 /* NB: NetWare servers lie about their hop count so we
768 * dropped the test based on it. This is the best way
769 * to determine this is a 0 hop count packet. */
770 if (!i) {
771 intrfc->if_netnum = cb->ipx_source_net;
772 ipxitf_add_local_route(intrfc);
773 } else {
774 printk(KERN_WARNING "IPX: Network number collision "
775 "%lx\n %s %s and %s %s\n",
776 (unsigned long) htonl(cb->ipx_source_net),
777 ipx_device_name(i),
778 ipx_frame_name(i->if_dlink_type),
779 ipx_device_name(intrfc),
780 ipx_frame_name(intrfc->if_dlink_type));
781 ipxitf_put(i);
782 }
783 }
784 }
785
786 /**
787 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
788 * NetBIOS broadcasts
789 * @intrfc: IPX interface receiving this packet
790 * @skb: Received packet
791 *
792 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
793 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
794 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
795 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
796 * RIP and SAP Router Specification", Part Number 107-000029-001.
797 *
798 * If it is valid, check if we have pprop broadcasting enabled by the user,
799 * if not, just return zero for local processing.
800 *
801 * If it is enabled check the packet and don't broadcast it if we have already
802 * seen this packet.
803 *
804 * Broadcast: send it to the interfaces that aren't on the packet visited nets
805 * array, just after the IPX header.
806 *
807 * Returns -EINVAL for invalid packets, so that the calling function drops
808 * the packet without local processing. 0 if packet is to be locally processed.
809 */
810 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
811 {
812 struct ipxhdr *ipx = ipx_hdr(skb);
813 int i, rc = -EINVAL;
814 struct ipx_interface *ifcs;
815 char *c;
816 u32 *l;
817
818 /* Illegal packet - too many hops or too short */
819 /* We decide to throw it away: no broadcasting, no local processing.
820 * NetBIOS unaware implementations route them as normal packets -
821 * tctrl <= 15, any data payload... */
822 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
823 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
824 IPX_MAX_PPROP_HOPS * sizeof(u32))
825 goto out;
826 /* are we broadcasting this damn thing? */
827 rc = 0;
828 if (!sysctl_ipx_pprop_broadcasting)
829 goto out;
830 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
831 * process it locally. All previous hops broadcasted it, and process it
832 * locally. */
833 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
834 goto out;
835
836 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
837 l = (u32 *) c;
838
839 /* Don't broadcast packet if already seen this net */
840 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
841 if (*l++ == intrfc->if_netnum)
842 goto out;
843
844 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
845 * position where we will insert recvd netnum into list, later on,
846 * in ipxitf_send */
847 IPX_SKB_CB(skb)->last_hop.index = i;
848 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
849 /* xmit on all other interfaces... */
850 spin_lock_bh(&ipx_interfaces_lock);
851 list_for_each_entry(ifcs, &ipx_interfaces, node) {
852 /* Except unconfigured interfaces */
853 if (!ifcs->if_netnum)
854 continue;
855
856 /* That aren't in the list */
857 if (ifcs == intrfc)
858 continue;
859 l = (__u32 *) c;
860 /* don't consider the last entry in the packet list,
861 * it is our netnum, and it is not there yet */
862 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
863 if (ifcs->if_netnum == *l++)
864 break;
865 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
866 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
867
868 if (s) {
869 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
870 ipxrtr_route_skb(s);
871 }
872 }
873 }
874 spin_unlock_bh(&ipx_interfaces_lock);
875 out:
876 return rc;
877 }
878
879 static void ipxitf_insert(struct ipx_interface *intrfc)
880 {
881 spin_lock_bh(&ipx_interfaces_lock);
882 list_add_tail(&intrfc->node, &ipx_interfaces);
883 spin_unlock_bh(&ipx_interfaces_lock);
884
885 if (ipxcfg_auto_select_primary && !ipx_primary_net)
886 ipx_primary_net = intrfc;
887 }
888
889 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __u32 netnum,
890 unsigned short dlink_type,
891 struct datalink_proto *dlink,
892 unsigned char internal,
893 int ipx_offset)
894 {
895 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
896
897 if (intrfc) {
898 intrfc->if_dev = dev;
899 intrfc->if_netnum = netnum;
900 intrfc->if_dlink_type = dlink_type;
901 intrfc->if_dlink = dlink;
902 intrfc->if_internal = internal;
903 intrfc->if_ipx_offset = ipx_offset;
904 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
905 INIT_HLIST_HEAD(&intrfc->if_sklist);
906 atomic_set(&intrfc->refcnt, 1);
907 spin_lock_init(&intrfc->if_sklist_lock);
908 }
909
910 return intrfc;
911 }
912
913 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
914 {
915 struct ipx_interface *intrfc;
916 int rc = -EEXIST;
917
918 /* Only one primary network allowed */
919 if (ipx_primary_net)
920 goto out;
921
922 /* Must have a valid network number */
923 rc = -EADDRNOTAVAIL;
924 if (!idef->ipx_network)
925 goto out;
926 intrfc = ipxitf_find_using_net(idef->ipx_network);
927 rc = -EADDRINUSE;
928 if (intrfc) {
929 ipxitf_put(intrfc);
930 goto out;
931 }
932 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
933 rc = -EAGAIN;
934 if (!intrfc)
935 goto out;
936 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
937 ipx_internal_net = ipx_primary_net = intrfc;
938 ipxitf_hold(intrfc);
939 ipxitf_insert(intrfc);
940
941 rc = ipxitf_add_local_route(intrfc);
942 ipxitf_put(intrfc);
943 out:
944 return rc;
945 }
946
947 static __be16 ipx_map_frame_type(unsigned char type)
948 {
949 __be16 rc = 0;
950
951 switch (type) {
952 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
953 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
954 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
955 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
956 }
957
958 return rc;
959 }
960
961 static int ipxitf_create(struct ipx_interface_definition *idef)
962 {
963 struct net_device *dev;
964 unsigned short dlink_type = 0;
965 struct datalink_proto *datalink = NULL;
966 struct ipx_interface *intrfc;
967 int rc;
968
969 if (idef->ipx_special == IPX_INTERNAL) {
970 rc = ipxitf_create_internal(idef);
971 goto out;
972 }
973
974 rc = -EEXIST;
975 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
976 goto out;
977
978 intrfc = ipxitf_find_using_net(idef->ipx_network);
979 rc = -EADDRINUSE;
980 if (idef->ipx_network && intrfc) {
981 ipxitf_put(intrfc);
982 goto out;
983 }
984
985 if (intrfc)
986 ipxitf_put(intrfc);
987
988 dev = dev_get_by_name(idef->ipx_device);
989 rc = -ENODEV;
990 if (!dev)
991 goto out;
992
993 switch (idef->ipx_dlink_type) {
994 case IPX_FRAME_TR_8022:
995 printk(KERN_WARNING "IPX frame type 802.2TR is "
996 "obsolete Use 802.2 instead.\n");
997 /* fall through */
998 case IPX_FRAME_8022:
999 dlink_type = htons(ETH_P_802_2);
1000 datalink = p8022_datalink;
1001 break;
1002 case IPX_FRAME_ETHERII:
1003 if (dev->type != ARPHRD_IEEE802) {
1004 dlink_type = htons(ETH_P_IPX);
1005 datalink = pEII_datalink;
1006 break;
1007 } else
1008 printk(KERN_WARNING "IPX frame type EtherII over "
1009 "token-ring is obsolete. Use SNAP "
1010 "instead.\n");
1011 /* fall through */
1012 case IPX_FRAME_SNAP:
1013 dlink_type = htons(ETH_P_SNAP);
1014 datalink = pSNAP_datalink;
1015 break;
1016 case IPX_FRAME_8023:
1017 dlink_type = htons(ETH_P_802_3);
1018 datalink = p8023_datalink;
1019 break;
1020 case IPX_FRAME_NONE:
1021 default:
1022 rc = -EPROTONOSUPPORT;
1023 goto out_dev;
1024 }
1025
1026 rc = -ENETDOWN;
1027 if (!(dev->flags & IFF_UP))
1028 goto out_dev;
1029
1030 /* Check addresses are suitable */
1031 rc = -EINVAL;
1032 if (dev->addr_len > IPX_NODE_LEN)
1033 goto out_dev;
1034
1035 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1036 if (!intrfc) {
1037 /* Ok now create */
1038 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1039 datalink, 0, dev->hard_header_len +
1040 datalink->header_length);
1041 rc = -EAGAIN;
1042 if (!intrfc)
1043 goto out_dev;
1044 /* Setup primary if necessary */
1045 if (idef->ipx_special == IPX_PRIMARY)
1046 ipx_primary_net = intrfc;
1047 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1048 IPX_NODE_LEN)) {
1049 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1050 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1051 dev->dev_addr, dev->addr_len);
1052 } else
1053 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1054 ipxitf_hold(intrfc);
1055 ipxitf_insert(intrfc);
1056 }
1057
1058
1059 /* If the network number is known, add a route */
1060 rc = 0;
1061 if (!intrfc->if_netnum)
1062 goto out_intrfc;
1063
1064 rc = ipxitf_add_local_route(intrfc);
1065 out_intrfc:
1066 ipxitf_put(intrfc);
1067 goto out;
1068 out_dev:
1069 dev_put(dev);
1070 out:
1071 return rc;
1072 }
1073
1074 static int ipxitf_delete(struct ipx_interface_definition *idef)
1075 {
1076 struct net_device *dev = NULL;
1077 unsigned short dlink_type = 0;
1078 struct ipx_interface *intrfc;
1079 int rc = 0;
1080
1081 spin_lock_bh(&ipx_interfaces_lock);
1082 if (idef->ipx_special == IPX_INTERNAL) {
1083 if (ipx_internal_net) {
1084 __ipxitf_put(ipx_internal_net);
1085 goto out;
1086 }
1087 rc = -ENOENT;
1088 goto out;
1089 }
1090
1091 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1092 rc = -EPROTONOSUPPORT;
1093 if (!dlink_type)
1094 goto out;
1095
1096 dev = __dev_get_by_name(idef->ipx_device);
1097 rc = -ENODEV;
1098 if (!dev)
1099 goto out;
1100
1101 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1102 rc = -EINVAL;
1103 if (!intrfc)
1104 goto out;
1105 __ipxitf_put(intrfc);
1106
1107 rc = 0;
1108 out:
1109 spin_unlock_bh(&ipx_interfaces_lock);
1110 return rc;
1111 }
1112
1113 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1114 unsigned short dlink_type)
1115 {
1116 struct ipx_interface *intrfc = NULL;
1117 struct datalink_proto *datalink;
1118
1119 if (!dev)
1120 goto out;
1121
1122 /* Check addresses are suitable */
1123 if (dev->addr_len > IPX_NODE_LEN)
1124 goto out;
1125
1126 switch (htons(dlink_type)) {
1127 case ETH_P_IPX: datalink = pEII_datalink; break;
1128 case ETH_P_802_2: datalink = p8022_datalink; break;
1129 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1130 case ETH_P_802_3: datalink = p8023_datalink; break;
1131 default: goto out;
1132 }
1133
1134 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1135 dev->hard_header_len + datalink->header_length);
1136
1137 if (intrfc) {
1138 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1139 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1140 dev->dev_addr, dev->addr_len);
1141 spin_lock_init(&intrfc->if_sklist_lock);
1142 atomic_set(&intrfc->refcnt, 1);
1143 ipxitf_insert(intrfc);
1144 dev_hold(dev);
1145 }
1146
1147 out:
1148 return intrfc;
1149 }
1150
1151 static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1152 {
1153 int rc = -EINVAL;
1154 struct ifreq ifr;
1155 int val;
1156
1157 switch (cmd) {
1158 case SIOCSIFADDR: {
1159 struct sockaddr_ipx *sipx;
1160 struct ipx_interface_definition f;
1161
1162 rc = -EFAULT;
1163 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1164 break;
1165 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1166 rc = -EINVAL;
1167 if (sipx->sipx_family != AF_IPX)
1168 break;
1169 f.ipx_network = sipx->sipx_network;
1170 memcpy(f.ipx_device, ifr.ifr_name,
1171 sizeof(f.ipx_device));
1172 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1173 f.ipx_dlink_type = sipx->sipx_type;
1174 f.ipx_special = sipx->sipx_special;
1175
1176 if (sipx->sipx_action == IPX_DLTITF)
1177 rc = ipxitf_delete(&f);
1178 else
1179 rc = ipxitf_create(&f);
1180 break;
1181 }
1182 case SIOCGIFADDR: {
1183 struct sockaddr_ipx *sipx;
1184 struct ipx_interface *ipxif;
1185 struct net_device *dev;
1186
1187 rc = -EFAULT;
1188 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1189 break;
1190 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1191 dev = __dev_get_by_name(ifr.ifr_name);
1192 rc = -ENODEV;
1193 if (!dev)
1194 break;
1195 ipxif = ipxitf_find_using_phys(dev,
1196 ipx_map_frame_type(sipx->sipx_type));
1197 rc = -EADDRNOTAVAIL;
1198 if (!ipxif)
1199 break;
1200
1201 sipx->sipx_family = AF_IPX;
1202 sipx->sipx_network = ipxif->if_netnum;
1203 memcpy(sipx->sipx_node, ipxif->if_node,
1204 sizeof(sipx->sipx_node));
1205 rc = -EFAULT;
1206 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1207 break;
1208 ipxitf_put(ipxif);
1209 rc = 0;
1210 break;
1211 }
1212 case SIOCAIPXITFCRT:
1213 rc = -EFAULT;
1214 if (get_user(val, (unsigned char __user *) arg))
1215 break;
1216 rc = 0;
1217 ipxcfg_auto_create_interfaces = val;
1218 break;
1219 case SIOCAIPXPRISLT:
1220 rc = -EFAULT;
1221 if (get_user(val, (unsigned char __user *) arg))
1222 break;
1223 rc = 0;
1224 ipxcfg_set_auto_select(val);
1225 break;
1226 }
1227
1228 return rc;
1229 }
1230
1231 /*
1232 * Checksum routine for IPX
1233 */
1234
1235 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1236 /* This functions should *not* mess with packet contents */
1237
1238 __u16 ipx_cksum(struct ipxhdr *packet, int length)
1239 {
1240 /*
1241 * NOTE: sum is a net byte order quantity, which optimizes the
1242 * loop. This only works on big and little endian machines. (I
1243 * don't know of a machine that isn't.)
1244 */
1245 /* start at ipx_dest - We skip the checksum field and start with
1246 * ipx_type before the loop, not considering ipx_tctrl in the calc */
1247 __u16 *p = (__u16 *)&packet->ipx_dest;
1248 __u32 i = (length >> 1) - 1; /* Number of complete words */
1249 __u32 sum = packet->ipx_type << sizeof(packet->ipx_tctrl);
1250
1251 /* Loop through all complete words except the checksum field,
1252 * ipx_type (accounted above) and ipx_tctrl (not used in the cksum) */
1253 while (--i)
1254 sum += *p++;
1255
1256 /* Add on the last part word if it exists */
1257 if (packet->ipx_pktsize & htons(1))
1258 sum += ntohs(0xff00) & *p;
1259
1260 /* Do final fixup */
1261 sum = (sum & 0xffff) + (sum >> 16);
1262
1263 /* It's a pity there's no concept of carry in C */
1264 if (sum >= 0x10000)
1265 sum++;
1266
1267 return ~sum;
1268 }
1269
1270 const char *ipx_frame_name(unsigned short frame)
1271 {
1272 char* rc = "None";
1273
1274 switch (ntohs(frame)) {
1275 case ETH_P_IPX: rc = "EtherII"; break;
1276 case ETH_P_802_2: rc = "802.2"; break;
1277 case ETH_P_SNAP: rc = "SNAP"; break;
1278 case ETH_P_802_3: rc = "802.3"; break;
1279 case ETH_P_TR_802_2: rc = "802.2TR"; break;
1280 }
1281
1282 return rc;
1283 }
1284
1285 const char *ipx_device_name(struct ipx_interface *intrfc)
1286 {
1287 return intrfc->if_internal ? "Internal" :
1288 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1289 }
1290
1291 /* Handling for system calls applied via the various interfaces to an IPX
1292 * socket object. */
1293
1294 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1295 char __user *optval, int optlen)
1296 {
1297 struct sock *sk = sock->sk;
1298 int opt;
1299 int rc = -EINVAL;
1300
1301 if (optlen != sizeof(int))
1302 goto out;
1303
1304 rc = -EFAULT;
1305 if (get_user(opt, (unsigned int __user *)optval))
1306 goto out;
1307
1308 rc = -ENOPROTOOPT;
1309 if (!(level == SOL_IPX && optname == IPX_TYPE))
1310 goto out;
1311
1312 ipx_sk(sk)->type = opt;
1313 rc = 0;
1314 out:
1315 return rc;
1316 }
1317
1318 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1319 char __user *optval, int __user *optlen)
1320 {
1321 struct sock *sk = sock->sk;
1322 int val = 0;
1323 int len;
1324 int rc = -ENOPROTOOPT;
1325
1326 if (!(level == SOL_IPX && optname == IPX_TYPE))
1327 goto out;
1328
1329 val = ipx_sk(sk)->type;
1330
1331 rc = -EFAULT;
1332 if (get_user(len, optlen))
1333 goto out;
1334
1335 len = min_t(unsigned int, len, sizeof(int));
1336 rc = -EINVAL;
1337 if(len < 0)
1338 goto out;
1339
1340 rc = -EFAULT;
1341 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1342 goto out;
1343
1344 rc = 0;
1345 out:
1346 return rc;
1347 }
1348
1349 static struct proto ipx_proto = {
1350 .name = "IPX",
1351 .owner = THIS_MODULE,
1352 .obj_size = sizeof(struct ipx_sock),
1353 };
1354
1355 static int ipx_create(struct socket *sock, int protocol)
1356 {
1357 int rc = -ESOCKTNOSUPPORT;
1358 struct sock *sk;
1359
1360 /*
1361 * SPX support is not anymore in the kernel sources. If you want to
1362 * ressurrect it, completing it and making it understand shared skbs,
1363 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1364 * tree.
1365 */
1366 if (sock->type != SOCK_DGRAM)
1367 goto out;
1368
1369 rc = -ENOMEM;
1370 sk = sk_alloc(PF_IPX, GFP_KERNEL, &ipx_proto, 1);
1371 if (!sk)
1372 goto out;
1373 #ifdef IPX_REFCNT_DEBUG
1374 atomic_inc(&ipx_sock_nr);
1375 printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk,
1376 atomic_read(&ipx_sock_nr));
1377 #endif
1378 sock_init_data(sock, sk);
1379 sk->sk_no_check = 1; /* Checksum off by default */
1380 sock->ops = &ipx_dgram_ops;
1381 rc = 0;
1382 out:
1383 return rc;
1384 }
1385
1386 static int ipx_release(struct socket *sock)
1387 {
1388 struct sock *sk = sock->sk;
1389
1390 if (!sk)
1391 goto out;
1392
1393 if (!sock_flag(sk, SOCK_DEAD))
1394 sk->sk_state_change(sk);
1395
1396 sock_set_flag(sk, SOCK_DEAD);
1397 sock->sk = NULL;
1398 ipx_destroy_socket(sk);
1399 out:
1400 return 0;
1401 }
1402
1403 /* caller must hold a reference to intrfc */
1404
1405 static unsigned short ipx_first_free_socketnum(struct ipx_interface *intrfc)
1406 {
1407 unsigned short socketNum = intrfc->if_sknum;
1408
1409 spin_lock_bh(&intrfc->if_sklist_lock);
1410
1411 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1412 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1413
1414 while (__ipxitf_find_socket(intrfc, ntohs(socketNum)))
1415 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1416 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1417 else
1418 socketNum++;
1419
1420 spin_unlock_bh(&intrfc->if_sklist_lock);
1421 intrfc->if_sknum = socketNum;
1422
1423 return ntohs(socketNum);
1424 }
1425
1426 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1427 {
1428 struct sock *sk = sock->sk;
1429 struct ipx_sock *ipxs = ipx_sk(sk);
1430 struct ipx_interface *intrfc;
1431 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1432 int rc = -EINVAL;
1433
1434 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1435 goto out;
1436
1437 intrfc = ipxitf_find_using_net(addr->sipx_network);
1438 rc = -EADDRNOTAVAIL;
1439 if (!intrfc)
1440 goto out;
1441
1442 if (!addr->sipx_port) {
1443 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1444 rc = -EINVAL;
1445 if (!addr->sipx_port)
1446 goto out_put;
1447 }
1448
1449 /* protect IPX system stuff like routing/sap */
1450 rc = -EACCES;
1451 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1452 !capable(CAP_NET_ADMIN))
1453 goto out_put;
1454
1455 ipxs->port = addr->sipx_port;
1456
1457 #ifdef CONFIG_IPX_INTERN
1458 if (intrfc == ipx_internal_net) {
1459 /* The source address is to be set explicitly if the
1460 * socket is to be bound on the internal network. If a
1461 * node number 0 was specified, the default is used.
1462 */
1463
1464 rc = -EINVAL;
1465 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1466 goto out_put;
1467 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1468 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1469 else
1470 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1471
1472 rc = -EADDRINUSE;
1473 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1474 ipxs->port)) {
1475 SOCK_DEBUG(sk,
1476 "IPX: bind failed because port %X in use.\n",
1477 ntohs((int)addr->sipx_port));
1478 goto out_put;
1479 }
1480 } else {
1481 /* Source addresses are easy. It must be our
1482 * network:node pair for an interface routed to IPX
1483 * with the ipx routing ioctl()
1484 */
1485
1486 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1487
1488 rc = -EADDRINUSE;
1489 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1490 SOCK_DEBUG(sk,
1491 "IPX: bind failed because port %X in use.\n",
1492 ntohs((int)addr->sipx_port));
1493 goto out_put;
1494 }
1495 }
1496
1497 #else /* !def CONFIG_IPX_INTERN */
1498
1499 /* Source addresses are easy. It must be our network:node pair for
1500 an interface routed to IPX with the ipx routing ioctl() */
1501
1502 rc = -EADDRINUSE;
1503 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1504 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1505 ntohs((int)addr->sipx_port));
1506 goto out_put;
1507 }
1508
1509 #endif /* CONFIG_IPX_INTERN */
1510
1511 ipxitf_insert_socket(intrfc, sk);
1512 sock_reset_flag(sk, SOCK_ZAPPED);
1513
1514 rc = 0;
1515 out_put:
1516 ipxitf_put(intrfc);
1517 out:
1518 return rc;
1519 }
1520
1521 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1522 int addr_len, int flags)
1523 {
1524 struct sock *sk = sock->sk;
1525 struct ipx_sock *ipxs = ipx_sk(sk);
1526 struct sockaddr_ipx *addr;
1527 int rc = -EINVAL;
1528 struct ipx_route *rt;
1529
1530 sk->sk_state = TCP_CLOSE;
1531 sock->state = SS_UNCONNECTED;
1532
1533 if (addr_len != sizeof(*addr))
1534 goto out;
1535 addr = (struct sockaddr_ipx *)uaddr;
1536
1537 /* put the autobinding in */
1538 if (!ipxs->port) {
1539 struct sockaddr_ipx uaddr;
1540
1541 uaddr.sipx_port = 0;
1542 uaddr.sipx_network = 0;
1543
1544 #ifdef CONFIG_IPX_INTERN
1545 rc = -ENETDOWN;
1546 if (!ipxs->intrfc)
1547 goto out; /* Someone zonked the iface */
1548 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1549 IPX_NODE_LEN);
1550 #endif /* CONFIG_IPX_INTERN */
1551
1552 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1553 sizeof(struct sockaddr_ipx));
1554 if (rc)
1555 goto out;
1556 }
1557
1558 /* We can either connect to primary network or somewhere
1559 * we can route to */
1560 rt = ipxrtr_lookup(addr->sipx_network);
1561 rc = -ENETUNREACH;
1562 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1563 goto out;
1564
1565 ipxs->dest_addr.net = addr->sipx_network;
1566 ipxs->dest_addr.sock = addr->sipx_port;
1567 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1568 ipxs->type = addr->sipx_type;
1569
1570 if (sock->type == SOCK_DGRAM) {
1571 sock->state = SS_CONNECTED;
1572 sk->sk_state = TCP_ESTABLISHED;
1573 }
1574
1575 if (rt)
1576 ipxrtr_put(rt);
1577 rc = 0;
1578 out:
1579 return rc;
1580 }
1581
1582
1583 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1584 int *uaddr_len, int peer)
1585 {
1586 struct ipx_address *addr;
1587 struct sockaddr_ipx sipx;
1588 struct sock *sk = sock->sk;
1589 struct ipx_sock *ipxs = ipx_sk(sk);
1590 int rc;
1591
1592 *uaddr_len = sizeof(struct sockaddr_ipx);
1593
1594 if (peer) {
1595 rc = -ENOTCONN;
1596 if (sk->sk_state != TCP_ESTABLISHED)
1597 goto out;
1598
1599 addr = &ipxs->dest_addr;
1600 sipx.sipx_network = addr->net;
1601 sipx.sipx_port = addr->sock;
1602 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1603 } else {
1604 if (ipxs->intrfc) {
1605 sipx.sipx_network = ipxs->intrfc->if_netnum;
1606 #ifdef CONFIG_IPX_INTERN
1607 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1608 #else
1609 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1610 IPX_NODE_LEN);
1611 #endif /* CONFIG_IPX_INTERN */
1612
1613 } else {
1614 sipx.sipx_network = 0;
1615 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1616 }
1617
1618 sipx.sipx_port = ipxs->port;
1619 }
1620
1621 sipx.sipx_family = AF_IPX;
1622 sipx.sipx_type = ipxs->type;
1623 sipx.sipx_zero = 0;
1624 memcpy(uaddr, &sipx, sizeof(sipx));
1625
1626 rc = 0;
1627 out:
1628 return rc;
1629 }
1630
1631 static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1632 {
1633 /* NULL here for pt means the packet was looped back */
1634 struct ipx_interface *intrfc;
1635 struct ipxhdr *ipx;
1636 u16 ipx_pktsize;
1637 int rc = 0;
1638
1639 /* Not ours */
1640 if (skb->pkt_type == PACKET_OTHERHOST)
1641 goto drop;
1642
1643 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1644 goto out;
1645
1646 ipx = ipx_hdr(skb);
1647 ipx_pktsize = ntohs(ipx->ipx_pktsize);
1648
1649 /* Too small or invalid header? */
1650 if (ipx_pktsize < sizeof(struct ipxhdr) || ipx_pktsize > skb->len)
1651 goto drop;
1652
1653 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1654 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1655 goto drop;
1656
1657 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1658 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1659 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1660
1661 /* Determine what local ipx endpoint this is */
1662 intrfc = ipxitf_find_using_phys(dev, pt->type);
1663 if (!intrfc) {
1664 if (ipxcfg_auto_create_interfaces &&
1665 ntohl(IPX_SKB_CB(skb)->ipx_dest_net)) {
1666 intrfc = ipxitf_auto_create(dev, pt->type);
1667 if (intrfc)
1668 ipxitf_hold(intrfc);
1669 }
1670
1671 if (!intrfc) /* Not one of ours */
1672 /* or invalid packet for auto creation */
1673 goto drop;
1674 }
1675
1676 rc = ipxitf_rcv(intrfc, skb);
1677 ipxitf_put(intrfc);
1678 goto out;
1679 drop:
1680 kfree_skb(skb);
1681 out:
1682 return rc;
1683 }
1684
1685 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1686 struct msghdr *msg, size_t len)
1687 {
1688 struct sock *sk = sock->sk;
1689 struct ipx_sock *ipxs = ipx_sk(sk);
1690 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1691 struct sockaddr_ipx local_sipx;
1692 int rc = -EINVAL;
1693 int flags = msg->msg_flags;
1694
1695 /* Socket gets bound below anyway */
1696 /* if (sk->sk_zapped)
1697 return -EIO; */ /* Socket not bound */
1698 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1699 goto out;
1700
1701 /* Max possible packet size limited by 16 bit pktsize in header */
1702 if (len >= 65535 - sizeof(struct ipxhdr))
1703 goto out;
1704
1705 if (usipx) {
1706 if (!ipxs->port) {
1707 struct sockaddr_ipx uaddr;
1708
1709 uaddr.sipx_port = 0;
1710 uaddr.sipx_network = 0;
1711 #ifdef CONFIG_IPX_INTERN
1712 rc = -ENETDOWN;
1713 if (!ipxs->intrfc)
1714 goto out; /* Someone zonked the iface */
1715 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1716 IPX_NODE_LEN);
1717 #endif
1718 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1719 sizeof(struct sockaddr_ipx));
1720 if (rc)
1721 goto out;
1722 }
1723
1724 rc = -EINVAL;
1725 if (msg->msg_namelen < sizeof(*usipx) ||
1726 usipx->sipx_family != AF_IPX)
1727 goto out;
1728 } else {
1729 rc = -ENOTCONN;
1730 if (sk->sk_state != TCP_ESTABLISHED)
1731 goto out;
1732
1733 usipx = &local_sipx;
1734 usipx->sipx_family = AF_IPX;
1735 usipx->sipx_type = ipxs->type;
1736 usipx->sipx_port = ipxs->dest_addr.sock;
1737 usipx->sipx_network = ipxs->dest_addr.net;
1738 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1739 }
1740
1741 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1742 flags & MSG_DONTWAIT);
1743 if (rc >= 0)
1744 rc = len;
1745 out:
1746 return rc;
1747 }
1748
1749
1750 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1751 struct msghdr *msg, size_t size, int flags)
1752 {
1753 struct sock *sk = sock->sk;
1754 struct ipx_sock *ipxs = ipx_sk(sk);
1755 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1756 struct ipxhdr *ipx = NULL;
1757 struct sk_buff *skb;
1758 int copied, rc;
1759
1760 /* put the autobinding in */
1761 if (!ipxs->port) {
1762 struct sockaddr_ipx uaddr;
1763
1764 uaddr.sipx_port = 0;
1765 uaddr.sipx_network = 0;
1766
1767 #ifdef CONFIG_IPX_INTERN
1768 rc = -ENETDOWN;
1769 if (!ipxs->intrfc)
1770 goto out; /* Someone zonked the iface */
1771 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1772 #endif /* CONFIG_IPX_INTERN */
1773
1774 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1775 sizeof(struct sockaddr_ipx));
1776 if (rc)
1777 goto out;
1778 }
1779
1780 rc = -ENOTCONN;
1781 if (sock_flag(sk, SOCK_ZAPPED))
1782 goto out;
1783
1784 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1785 flags & MSG_DONTWAIT, &rc);
1786 if (!skb)
1787 goto out;
1788
1789 ipx = ipx_hdr(skb);
1790 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1791 if (copied > size) {
1792 copied = size;
1793 msg->msg_flags |= MSG_TRUNC;
1794 }
1795
1796 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1797 copied);
1798 if (rc)
1799 goto out_free;
1800 if (skb->tstamp.off_sec)
1801 skb_get_timestamp(skb, &sk->sk_stamp);
1802
1803 msg->msg_namelen = sizeof(*sipx);
1804
1805 if (sipx) {
1806 sipx->sipx_family = AF_IPX;
1807 sipx->sipx_port = ipx->ipx_source.sock;
1808 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1809 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1810 sipx->sipx_type = ipx->ipx_type;
1811 sipx->sipx_zero = 0;
1812 }
1813 rc = copied;
1814
1815 out_free:
1816 skb_free_datagram(sk, skb);
1817 out:
1818 return rc;
1819 }
1820
1821
1822 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1823 {
1824 int rc = 0;
1825 long amount = 0;
1826 struct sock *sk = sock->sk;
1827 void __user *argp = (void __user *)arg;
1828
1829 switch (cmd) {
1830 case TIOCOUTQ:
1831 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1832 if (amount < 0)
1833 amount = 0;
1834 rc = put_user(amount, (int __user *)argp);
1835 break;
1836 case TIOCINQ: {
1837 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1838 /* These two are safe on a single CPU system as only
1839 * user tasks fiddle here */
1840 if (skb)
1841 amount = skb->len - sizeof(struct ipxhdr);
1842 rc = put_user(amount, (int __user *)argp);
1843 break;
1844 }
1845 case SIOCADDRT:
1846 case SIOCDELRT:
1847 rc = -EPERM;
1848 if (capable(CAP_NET_ADMIN))
1849 rc = ipxrtr_ioctl(cmd, argp);
1850 break;
1851 case SIOCSIFADDR:
1852 case SIOCAIPXITFCRT:
1853 case SIOCAIPXPRISLT:
1854 rc = -EPERM;
1855 if (!capable(CAP_NET_ADMIN))
1856 break;
1857 case SIOCGIFADDR:
1858 rc = ipxitf_ioctl(cmd, argp);
1859 break;
1860 case SIOCIPXCFGDATA:
1861 rc = ipxcfg_get_config_data(argp);
1862 break;
1863 case SIOCIPXNCPCONN:
1864 /*
1865 * This socket wants to take care of the NCP connection
1866 * handed to us in arg.
1867 */
1868 rc = -EPERM;
1869 if (!capable(CAP_NET_ADMIN))
1870 break;
1871 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1872 (const unsigned short __user *)argp);
1873 break;
1874 case SIOCGSTAMP:
1875 rc = -EINVAL;
1876 if (sk)
1877 rc = sock_get_timestamp(sk, argp);
1878 break;
1879 case SIOCGIFDSTADDR:
1880 case SIOCSIFDSTADDR:
1881 case SIOCGIFBRDADDR:
1882 case SIOCSIFBRDADDR:
1883 case SIOCGIFNETMASK:
1884 case SIOCSIFNETMASK:
1885 rc = -EINVAL;
1886 break;
1887 default:
1888 rc = -ENOIOCTLCMD;
1889 break;
1890 }
1891
1892 return rc;
1893 }
1894
1895
1896 #ifdef CONFIG_COMPAT
1897 static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1898 {
1899 /*
1900 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1901 * commands is handled by generic ioctl code. As these commands are
1902 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1903 * code.
1904 */
1905 switch (cmd) {
1906 case SIOCAIPXITFCRT:
1907 case SIOCAIPXPRISLT:
1908 case SIOCIPXCFGDATA:
1909 case SIOCIPXNCPCONN:
1910 return ipx_ioctl(sock, cmd, arg);
1911 default:
1912 return -ENOIOCTLCMD;
1913 }
1914 }
1915 #endif
1916
1917
1918 /*
1919 * Socket family declarations
1920 */
1921
1922 static struct net_proto_family ipx_family_ops = {
1923 .family = PF_IPX,
1924 .create = ipx_create,
1925 .owner = THIS_MODULE,
1926 };
1927
1928 static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
1929 .family = PF_IPX,
1930 .owner = THIS_MODULE,
1931 .release = ipx_release,
1932 .bind = ipx_bind,
1933 .connect = ipx_connect,
1934 .socketpair = sock_no_socketpair,
1935 .accept = sock_no_accept,
1936 .getname = ipx_getname,
1937 .poll = datagram_poll,
1938 .ioctl = ipx_ioctl,
1939 #ifdef CONFIG_COMPAT
1940 .compat_ioctl = ipx_compat_ioctl,
1941 #endif
1942 .listen = sock_no_listen,
1943 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1944 .setsockopt = ipx_setsockopt,
1945 .getsockopt = ipx_getsockopt,
1946 .sendmsg = ipx_sendmsg,
1947 .recvmsg = ipx_recvmsg,
1948 .mmap = sock_no_mmap,
1949 .sendpage = sock_no_sendpage,
1950 };
1951
1952 #include <linux/smp_lock.h>
1953 SOCKOPS_WRAP(ipx_dgram, PF_IPX);
1954
1955 static struct packet_type ipx_8023_packet_type = {
1956 .type = __constant_htons(ETH_P_802_3),
1957 .func = ipx_rcv,
1958 };
1959
1960 static struct packet_type ipx_dix_packet_type = {
1961 .type = __constant_htons(ETH_P_IPX),
1962 .func = ipx_rcv,
1963 };
1964
1965 static struct notifier_block ipx_dev_notifier = {
1966 .notifier_call = ipxitf_device_event,
1967 };
1968
1969 extern struct datalink_proto *make_EII_client(void);
1970 extern void destroy_EII_client(struct datalink_proto *);
1971
1972 static unsigned char ipx_8022_type = 0xE0;
1973 static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1974 static char ipx_EII_err_msg[] __initdata =
1975 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1976 static char ipx_8023_err_msg[] __initdata =
1977 KERN_CRIT "IPX: Unable to register with 802.3\n";
1978 static char ipx_llc_err_msg[] __initdata =
1979 KERN_CRIT "IPX: Unable to register with 802.2\n";
1980 static char ipx_snap_err_msg[] __initdata =
1981 KERN_CRIT "IPX: Unable to register with SNAP\n";
1982
1983 static int __init ipx_init(void)
1984 {
1985 int rc = proto_register(&ipx_proto, 1);
1986
1987 if (rc != 0)
1988 goto out;
1989
1990 sock_register(&ipx_family_ops);
1991
1992 pEII_datalink = make_EII_client();
1993 if (pEII_datalink)
1994 dev_add_pack(&ipx_dix_packet_type);
1995 else
1996 printk(ipx_EII_err_msg);
1997
1998 p8023_datalink = make_8023_client();
1999 if (p8023_datalink)
2000 dev_add_pack(&ipx_8023_packet_type);
2001 else
2002 printk(ipx_8023_err_msg);
2003
2004 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2005 if (!p8022_datalink)
2006 printk(ipx_llc_err_msg);
2007
2008 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2009 if (!pSNAP_datalink)
2010 printk(ipx_snap_err_msg);
2011
2012 register_netdevice_notifier(&ipx_dev_notifier);
2013 ipx_register_sysctl();
2014 ipx_proc_init();
2015 out:
2016 return rc;
2017 }
2018
2019 static void __exit ipx_proto_finito(void)
2020 {
2021 ipx_proc_exit();
2022 ipx_unregister_sysctl();
2023
2024 unregister_netdevice_notifier(&ipx_dev_notifier);
2025
2026 ipxitf_cleanup();
2027
2028 unregister_snap_client(pSNAP_datalink);
2029 pSNAP_datalink = NULL;
2030
2031 unregister_8022_client(p8022_datalink);
2032 p8022_datalink = NULL;
2033
2034 dev_remove_pack(&ipx_8023_packet_type);
2035 destroy_8023_client(p8023_datalink);
2036 p8023_datalink = NULL;
2037
2038 dev_remove_pack(&ipx_dix_packet_type);
2039 destroy_EII_client(pEII_datalink);
2040 pEII_datalink = NULL;
2041
2042 proto_unregister(&ipx_proto);
2043 sock_unregister(ipx_family_ops.family);
2044 }
2045
2046 module_init(ipx_init);
2047 module_exit(ipx_proto_finito);
2048 MODULE_LICENSE("GPL");
2049 MODULE_ALIAS_NETPROTO(PF_IPX);
linux v2.6.22.y-op