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kbuild: stepping down as maintainer
[wandboard.git] / net / ipx / af_ipx.c
blob66c7a20011f36b3147bb66c5169f5c292236f597
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/skbuff.h>
44 #include <linux/smp_lock.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 sock_put(sk);
152 }
153
154 /*
155 * The following code is used to support IPX Interfaces (IPXITF). An
156 * IPX interface is defined by a physical device and a frame type.
157 */
158
159 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
160
161 static void ipxitf_clear_primary_net(void)
162 {
163 ipx_primary_net = NULL;
164 if (ipxcfg_auto_select_primary)
165 ipx_primary_net = ipx_interfaces_head();
166 }
167
168 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
169 __be16 datalink)
170 {
171 struct ipx_interface *i;
172
173 list_for_each_entry(i, &ipx_interfaces, node)
174 if (i->if_dev == dev && i->if_dlink_type == datalink)
175 goto out;
176 i = NULL;
177 out:
178 return i;
179 }
180
181 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
182 __be16 datalink)
183 {
184 struct ipx_interface *i;
185
186 spin_lock_bh(&ipx_interfaces_lock);
187 i = __ipxitf_find_using_phys(dev, datalink);
188 if (i)
189 ipxitf_hold(i);
190 spin_unlock_bh(&ipx_interfaces_lock);
191 return i;
192 }
193
194 struct ipx_interface *ipxitf_find_using_net(__be32 net)
195 {
196 struct ipx_interface *i;
197
198 spin_lock_bh(&ipx_interfaces_lock);
199 if (net) {
200 list_for_each_entry(i, &ipx_interfaces, node)
201 if (i->if_netnum == net)
202 goto hold;
203 i = NULL;
204 goto unlock;
205 }
206
207 i = ipx_primary_net;
208 if (i)
209 hold:
210 ipxitf_hold(i);
211 unlock:
212 spin_unlock_bh(&ipx_interfaces_lock);
213 return i;
214 }
215
216 /* Sockets are bound to a particular IPX interface. */
217 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
218 {
219 ipxitf_hold(intrfc);
220 spin_lock_bh(&intrfc->if_sklist_lock);
221 ipx_sk(sk)->intrfc = intrfc;
222 sk_add_node(sk, &intrfc->if_sklist);
223 spin_unlock_bh(&intrfc->if_sklist_lock);
224 ipxitf_put(intrfc);
225 }
226
227 /* caller must hold intrfc->if_sklist_lock */
228 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
229 __be16 port)
230 {
231 struct sock *s;
232 struct hlist_node *node;
233
234 sk_for_each(s, node, &intrfc->if_sklist)
235 if (ipx_sk(s)->port == port)
236 goto found;
237 s = NULL;
238 found:
239 return s;
240 }
241
242 /* caller must hold a reference to intrfc */
243 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
244 __be16 port)
245 {
246 struct sock *s;
247
248 spin_lock_bh(&intrfc->if_sklist_lock);
249 s = __ipxitf_find_socket(intrfc, port);
250 if (s)
251 sock_hold(s);
252 spin_unlock_bh(&intrfc->if_sklist_lock);
253
254 return s;
255 }
256
257 #ifdef CONFIG_IPX_INTERN
258 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
259 unsigned char *ipx_node,
260 __be16 port)
261 {
262 struct sock *s;
263 struct hlist_node *node;
264
265 ipxitf_hold(intrfc);
266 spin_lock_bh(&intrfc->if_sklist_lock);
267
268 sk_for_each(s, node, &intrfc->if_sklist) {
269 struct ipx_sock *ipxs = ipx_sk(s);
270
271 if (ipxs->port == port &&
272 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
273 goto found;
274 }
275 s = NULL;
276 found:
277 spin_unlock_bh(&intrfc->if_sklist_lock);
278 ipxitf_put(intrfc);
279 return s;
280 }
281 #endif
282
283 static void __ipxitf_down(struct ipx_interface *intrfc)
284 {
285 struct sock *s;
286 struct hlist_node *node, *t;
287
288 /* Delete all routes associated with this interface */
289 ipxrtr_del_routes(intrfc);
290
291 spin_lock_bh(&intrfc->if_sklist_lock);
292 /* error sockets */
293 sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
294 struct ipx_sock *ipxs = ipx_sk(s);
295
296 s->sk_err = ENOLINK;
297 s->sk_error_report(s);
298 ipxs->intrfc = NULL;
299 ipxs->port = 0;
300 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
301 sk_del_node_init(s);
302 }
303 INIT_HLIST_HEAD(&intrfc->if_sklist);
304 spin_unlock_bh(&intrfc->if_sklist_lock);
305
306 /* remove this interface from list */
307 list_del(&intrfc->node);
308
309 /* remove this interface from *special* networks */
310 if (intrfc == ipx_primary_net)
311 ipxitf_clear_primary_net();
312 if (intrfc == ipx_internal_net)
313 ipx_internal_net = NULL;
314
315 if (intrfc->if_dev)
316 dev_put(intrfc->if_dev);
317 kfree(intrfc);
318 }
319
320 void ipxitf_down(struct ipx_interface *intrfc)
321 {
322 spin_lock_bh(&ipx_interfaces_lock);
323 __ipxitf_down(intrfc);
324 spin_unlock_bh(&ipx_interfaces_lock);
325 }
326
327 static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
328 {
329 if (atomic_dec_and_test(&intrfc->refcnt))
330 __ipxitf_down(intrfc);
331 }
332
333 static int ipxitf_device_event(struct notifier_block *notifier,
334 unsigned long event, void *ptr)
335 {
336 struct net_device *dev = ptr;
337 struct ipx_interface *i, *tmp;
338
339 if (!net_eq(dev_net(dev), &init_net))
340 return NOTIFY_DONE;
341
342 if (event != NETDEV_DOWN && event != NETDEV_UP)
343 goto out;
344
345 spin_lock_bh(&ipx_interfaces_lock);
346 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
347 if (i->if_dev == dev) {
348 if (event == NETDEV_UP)
349 ipxitf_hold(i);
350 else
351 __ipxitf_put(i);
352 }
353 spin_unlock_bh(&ipx_interfaces_lock);
354 out:
355 return NOTIFY_DONE;
356 }
357
358
359 static __exit void ipxitf_cleanup(void)
360 {
361 struct ipx_interface *i, *tmp;
362
363 spin_lock_bh(&ipx_interfaces_lock);
364 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
365 __ipxitf_put(i);
366 spin_unlock_bh(&ipx_interfaces_lock);
367 }
368
369 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
370 {
371 if (sock_queue_rcv_skb(sock, skb) < 0)
372 kfree_skb(skb);
373 }
374
375 /*
376 * On input skb->sk is NULL. Nobody is charged for the memory.
377 */
378
379 /* caller must hold a reference to intrfc */
380
381 #ifdef CONFIG_IPX_INTERN
382 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
383 struct sk_buff *skb, int copy)
384 {
385 struct ipxhdr *ipx = ipx_hdr(skb);
386 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
387 IPX_NODE_LEN);
388 struct sock *s;
389 struct hlist_node *node;
390 int rc;
391
392 spin_lock_bh(&intrfc->if_sklist_lock);
393
394 sk_for_each(s, node, &intrfc->if_sklist) {
395 struct ipx_sock *ipxs = ipx_sk(s);
396
397 if (ipxs->port == ipx->ipx_dest.sock &&
398 (is_broadcast || !memcmp(ipx->ipx_dest.node,
399 ipxs->node, IPX_NODE_LEN))) {
400 /* We found a socket to which to send */
401 struct sk_buff *skb1;
402
403 if (copy) {
404 skb1 = skb_clone(skb, GFP_ATOMIC);
405 rc = -ENOMEM;
406 if (!skb1)
407 goto out;
408 } else {
409 skb1 = skb;
410 copy = 1; /* skb may only be used once */
411 }
412 ipxitf_def_skb_handler(s, skb1);
413
414 /* On an external interface, one socket can listen */
415 if (intrfc != ipx_internal_net)
416 break;
417 }
418 }
419
420 /* skb was solely for us, and we did not make a copy, so free it. */
421 if (!copy)
422 kfree_skb(skb);
423
424 rc = 0;
425 out:
426 spin_unlock_bh(&intrfc->if_sklist_lock);
427 return rc;
428 }
429 #else
430 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
431 struct ipxhdr *ipx)
432 {
433 /* The packet's target is a NCP connection handler. We want to hand it
434 * to the correct socket directly within the kernel, so that the
435 * mars_nwe packet distribution process does not have to do it. Here we
436 * only care about NCP and BURST packets.
437 *
438 * You might call this a hack, but believe me, you do not want a
439 * complete NCP layer in the kernel, and this is VERY fast as well. */
440 struct sock *sk = NULL;
441 int connection = 0;
442 u8 *ncphdr = (u8 *)(ipx + 1);
443
444 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
445 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
446 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
447 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
448
449 if (connection) {
450 struct hlist_node *node;
451 /* Now we have to look for a special NCP connection handling
452 * socket. Only these sockets have ipx_ncp_conn != 0, set by
453 * SIOCIPXNCPCONN. */
454 spin_lock_bh(&intrfc->if_sklist_lock);
455 sk_for_each(sk, node, &intrfc->if_sklist)
456 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
457 sock_hold(sk);
458 goto found;
459 }
460 sk = NULL;
461 found:
462 spin_unlock_bh(&intrfc->if_sklist_lock);
463 }
464 return sk;
465 }
466
467 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
468 struct sk_buff *skb, int copy)
469 {
470 struct ipxhdr *ipx = ipx_hdr(skb);
471 struct sock *sock1 = NULL, *sock2 = NULL;
472 struct sk_buff *skb1 = NULL, *skb2 = NULL;
473 int rc;
474
475 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
476 sock1 = ncp_connection_hack(intrfc, ipx);
477 if (!sock1)
478 /* No special socket found, forward the packet the normal way */
479 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
480
481 /*
482 * We need to check if there is a primary net and if
483 * this is addressed to one of the *SPECIAL* sockets because
484 * these need to be propagated to the primary net.
485 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
486 * 0x456(Diagnostic).
487 */
488
489 if (ipx_primary_net && intrfc != ipx_primary_net) {
490 const int dsock = ntohs(ipx->ipx_dest.sock);
491
492 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
493 /* The appropriate thing to do here is to dup the
494 * packet and route to the primary net interface via
495 * ipxitf_send; however, we'll cheat and just demux it
496 * here. */
497 sock2 = ipxitf_find_socket(ipx_primary_net,
498 ipx->ipx_dest.sock);
499 }
500
501 /*
502 * If there is nothing to do return. The kfree will cancel any charging.
503 */
504 rc = 0;
505 if (!sock1 && !sock2) {
506 if (!copy)
507 kfree_skb(skb);
508 goto out;
509 }
510
511 /*
512 * This next segment of code is a little awkward, but it sets it up
513 * so that the appropriate number of copies of the SKB are made and
514 * that skb1 and skb2 point to it (them) so that it (they) can be
515 * demuxed to sock1 and/or sock2. If we are unable to make enough
516 * copies, we do as much as is possible.
517 */
518
519 if (copy)
520 skb1 = skb_clone(skb, GFP_ATOMIC);
521 else
522 skb1 = skb;
523
524 rc = -ENOMEM;
525 if (!skb1)
526 goto out_put;
527
528 /* Do we need 2 SKBs? */
529 if (sock1 && sock2)
530 skb2 = skb_clone(skb1, GFP_ATOMIC);
531 else
532 skb2 = skb1;
533
534 if (sock1)
535 ipxitf_def_skb_handler(sock1, skb1);
536
537 if (!skb2)
538 goto out_put;
539
540 if (sock2)
541 ipxitf_def_skb_handler(sock2, skb2);
542
543 rc = 0;
544 out_put:
545 if (sock1)
546 sock_put(sock1);
547 if (sock2)
548 sock_put(sock2);
549 out:
550 return rc;
551 }
552 #endif /* CONFIG_IPX_INTERN */
553
554 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
555 struct sk_buff *skb)
556 {
557 struct sk_buff *skb2;
558 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
559 int out_offset = intrfc->if_ipx_offset;
560 int len;
561
562 /* Hopefully, most cases */
563 if (in_offset >= out_offset)
564 return skb;
565
566 /* Need new SKB */
567 len = skb->len + out_offset;
568 skb2 = alloc_skb(len, GFP_ATOMIC);
569 if (skb2) {
570 skb_reserve(skb2, out_offset);
571 skb_reset_network_header(skb2);
572 skb_reset_transport_header(skb2);
573 skb_put(skb2, skb->len);
574 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
575 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
576 }
577 kfree_skb(skb);
578 return skb2;
579 }
580
581 /* caller must hold a reference to intrfc and the skb has to be unshared */
582 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
583 {
584 struct ipxhdr *ipx = ipx_hdr(skb);
585 struct net_device *dev = intrfc->if_dev;
586 struct datalink_proto *dl = intrfc->if_dlink;
587 char dest_node[IPX_NODE_LEN];
588 int send_to_wire = 1;
589 int addr_len;
590
591 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
592 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
593 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
594
595 /* see if we need to include the netnum in the route list */
596 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
597 __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
598 sizeof(struct ipxhdr) +
599 IPX_SKB_CB(skb)->last_hop.index *
600 sizeof(__be32));
601 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
602 IPX_SKB_CB(skb)->last_hop.index = -1;
603 }
604
605 /*
606 * We need to know how many skbuffs it will take to send out this
607 * packet to avoid unnecessary copies.
608 */
609
610 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
611 send_to_wire = 0; /* No non looped */
612
613 /*
614 * See if this should be demuxed to sockets on this interface
615 *
616 * We want to ensure the original was eaten or that we only use
617 * up clones.
618 */
619
620 if (ipx->ipx_dest.net == intrfc->if_netnum) {
621 /*
622 * To our own node, loop and free the original.
623 * The internal net will receive on all node address.
624 */
625 if (intrfc == ipx_internal_net ||
626 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
627 /* Don't charge sender */
628 skb_orphan(skb);
629
630 /* Will charge receiver */
631 return ipxitf_demux_socket(intrfc, skb, 0);
632 }
633
634 /* Broadcast, loop and possibly keep to send on. */
635 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
636 if (!send_to_wire)
637 skb_orphan(skb);
638 ipxitf_demux_socket(intrfc, skb, send_to_wire);
639 if (!send_to_wire)
640 goto out;
641 }
642 }
643
644 /*
645 * If the originating net is not equal to our net; this is routed
646 * We are still charging the sender. Which is right - the driver
647 * free will handle this fairly.
648 */
649 if (ipx->ipx_source.net != intrfc->if_netnum) {
650 /*
651 * Unshare the buffer before modifying the count in
652 * case it's a flood or tcpdump
653 */
654 skb = skb_unshare(skb, GFP_ATOMIC);
655 if (!skb)
656 goto out;
657 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
658 send_to_wire = 0;
659 }
660
661 if (!send_to_wire) {
662 kfree_skb(skb);
663 goto out;
664 }
665
666 /* Determine the appropriate hardware address */
667 addr_len = dev->addr_len;
668 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
669 memcpy(dest_node, dev->broadcast, addr_len);
670 else
671 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
672
673 /* Make any compensation for differing physical/data link size */
674 skb = ipxitf_adjust_skbuff(intrfc, skb);
675 if (!skb)
676 goto out;
677
678 /* set up data link and physical headers */
679 skb->dev = dev;
680 skb->protocol = htons(ETH_P_IPX);
681
682 /* Send it out */
683 dl->request(dl, skb, dest_node);
684 out:
685 return 0;
686 }
687
688 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
689 {
690 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
691 }
692
693 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
694 struct sk_buff *skb);
695 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
696
697 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
698 {
699 struct ipxhdr *ipx = ipx_hdr(skb);
700 int rc = 0;
701
702 ipxitf_hold(intrfc);
703
704 /* See if we should update our network number */
705 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
706 ipxitf_discover_netnum(intrfc, skb);
707
708 IPX_SKB_CB(skb)->last_hop.index = -1;
709 if (ipx->ipx_type == IPX_TYPE_PPROP) {
710 rc = ipxitf_pprop(intrfc, skb);
711 if (rc)
712 goto out_free_skb;
713 }
714
715 /* local processing follows */
716 if (!IPX_SKB_CB(skb)->ipx_dest_net)
717 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
718 if (!IPX_SKB_CB(skb)->ipx_source_net)
719 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
720
721 /* it doesn't make sense to route a pprop packet, there's no meaning
722 * in the ipx_dest_net for such packets */
723 if (ipx->ipx_type != IPX_TYPE_PPROP &&
724 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
725 /* We only route point-to-point packets. */
726 if (skb->pkt_type == PACKET_HOST) {
727 skb = skb_unshare(skb, GFP_ATOMIC);
728 if (skb)
729 rc = ipxrtr_route_skb(skb);
730 goto out_intrfc;
731 }
732
733 goto out_free_skb;
734 }
735
736 /* see if we should keep it */
737 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
738 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
739 rc = ipxitf_demux_socket(intrfc, skb, 0);
740 goto out_intrfc;
741 }
742
743 /* we couldn't pawn it off so unload it */
744 out_free_skb:
745 kfree_skb(skb);
746 out_intrfc:
747 ipxitf_put(intrfc);
748 return rc;
749 }
750
751 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
752 struct sk_buff *skb)
753 {
754 const struct ipx_cb *cb = IPX_SKB_CB(skb);
755
756 /* see if this is an intra packet: source_net == dest_net */
757 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
758 struct ipx_interface *i =
759 ipxitf_find_using_net(cb->ipx_source_net);
760 /* NB: NetWare servers lie about their hop count so we
761 * dropped the test based on it. This is the best way
762 * to determine this is a 0 hop count packet. */
763 if (!i) {
764 intrfc->if_netnum = cb->ipx_source_net;
765 ipxitf_add_local_route(intrfc);
766 } else {
767 printk(KERN_WARNING "IPX: Network number collision "
768 "%lx\n %s %s and %s %s\n",
769 (unsigned long) ntohl(cb->ipx_source_net),
770 ipx_device_name(i),
771 ipx_frame_name(i->if_dlink_type),
772 ipx_device_name(intrfc),
773 ipx_frame_name(intrfc->if_dlink_type));
774 ipxitf_put(i);
775 }
776 }
777 }
778
779 /**
780 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
781 * NetBIOS broadcasts
782 * @intrfc: IPX interface receiving this packet
783 * @skb: Received packet
784 *
785 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
786 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
787 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
788 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
789 * RIP and SAP Router Specification", Part Number 107-000029-001.
790 *
791 * If it is valid, check if we have pprop broadcasting enabled by the user,
792 * if not, just return zero for local processing.
793 *
794 * If it is enabled check the packet and don't broadcast it if we have already
795 * seen this packet.
796 *
797 * Broadcast: send it to the interfaces that aren't on the packet visited nets
798 * array, just after the IPX header.
799 *
800 * Returns -EINVAL for invalid packets, so that the calling function drops
801 * the packet without local processing. 0 if packet is to be locally processed.
802 */
803 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
804 {
805 struct ipxhdr *ipx = ipx_hdr(skb);
806 int i, rc = -EINVAL;
807 struct ipx_interface *ifcs;
808 char *c;
809 __be32 *l;
810
811 /* Illegal packet - too many hops or too short */
812 /* We decide to throw it away: no broadcasting, no local processing.
813 * NetBIOS unaware implementations route them as normal packets -
814 * tctrl <= 15, any data payload... */
815 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
816 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
817 IPX_MAX_PPROP_HOPS * sizeof(u32))
818 goto out;
819 /* are we broadcasting this damn thing? */
820 rc = 0;
821 if (!sysctl_ipx_pprop_broadcasting)
822 goto out;
823 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
824 * process it locally. All previous hops broadcasted it, and process it
825 * locally. */
826 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
827 goto out;
828
829 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
830 l = (__be32 *) c;
831
832 /* Don't broadcast packet if already seen this net */
833 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
834 if (*l++ == intrfc->if_netnum)
835 goto out;
836
837 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
838 * position where we will insert recvd netnum into list, later on,
839 * in ipxitf_send */
840 IPX_SKB_CB(skb)->last_hop.index = i;
841 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
842 /* xmit on all other interfaces... */
843 spin_lock_bh(&ipx_interfaces_lock);
844 list_for_each_entry(ifcs, &ipx_interfaces, node) {
845 /* Except unconfigured interfaces */
846 if (!ifcs->if_netnum)
847 continue;
848
849 /* That aren't in the list */
850 if (ifcs == intrfc)
851 continue;
852 l = (__be32 *) c;
853 /* don't consider the last entry in the packet list,
854 * it is our netnum, and it is not there yet */
855 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
856 if (ifcs->if_netnum == *l++)
857 break;
858 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
859 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
860
861 if (s) {
862 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
863 ipxrtr_route_skb(s);
864 }
865 }
866 }
867 spin_unlock_bh(&ipx_interfaces_lock);
868 out:
869 return rc;
870 }
871
872 static void ipxitf_insert(struct ipx_interface *intrfc)
873 {
874 spin_lock_bh(&ipx_interfaces_lock);
875 list_add_tail(&intrfc->node, &ipx_interfaces);
876 spin_unlock_bh(&ipx_interfaces_lock);
877
878 if (ipxcfg_auto_select_primary && !ipx_primary_net)
879 ipx_primary_net = intrfc;
880 }
881
882 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
883 __be16 dlink_type,
884 struct datalink_proto *dlink,
885 unsigned char internal,
886 int ipx_offset)
887 {
888 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
889
890 if (intrfc) {
891 intrfc->if_dev = dev;
892 intrfc->if_netnum = netnum;
893 intrfc->if_dlink_type = dlink_type;
894 intrfc->if_dlink = dlink;
895 intrfc->if_internal = internal;
896 intrfc->if_ipx_offset = ipx_offset;
897 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
898 INIT_HLIST_HEAD(&intrfc->if_sklist);
899 atomic_set(&intrfc->refcnt, 1);
900 spin_lock_init(&intrfc->if_sklist_lock);
901 }
902
903 return intrfc;
904 }
905
906 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
907 {
908 struct ipx_interface *intrfc;
909 int rc = -EEXIST;
910
911 /* Only one primary network allowed */
912 if (ipx_primary_net)
913 goto out;
914
915 /* Must have a valid network number */
916 rc = -EADDRNOTAVAIL;
917 if (!idef->ipx_network)
918 goto out;
919 intrfc = ipxitf_find_using_net(idef->ipx_network);
920 rc = -EADDRINUSE;
921 if (intrfc) {
922 ipxitf_put(intrfc);
923 goto out;
924 }
925 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
926 rc = -EAGAIN;
927 if (!intrfc)
928 goto out;
929 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
930 ipx_internal_net = ipx_primary_net = intrfc;
931 ipxitf_hold(intrfc);
932 ipxitf_insert(intrfc);
933
934 rc = ipxitf_add_local_route(intrfc);
935 ipxitf_put(intrfc);
936 out:
937 return rc;
938 }
939
940 static __be16 ipx_map_frame_type(unsigned char type)
941 {
942 __be16 rc = 0;
943
944 switch (type) {
945 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
946 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
947 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
948 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
949 }
950
951 return rc;
952 }
953
954 static int ipxitf_create(struct ipx_interface_definition *idef)
955 {
956 struct net_device *dev;
957 __be16 dlink_type = 0;
958 struct datalink_proto *datalink = NULL;
959 struct ipx_interface *intrfc;
960 int rc;
961
962 if (idef->ipx_special == IPX_INTERNAL) {
963 rc = ipxitf_create_internal(idef);
964 goto out;
965 }
966
967 rc = -EEXIST;
968 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
969 goto out;
970
971 intrfc = ipxitf_find_using_net(idef->ipx_network);
972 rc = -EADDRINUSE;
973 if (idef->ipx_network && intrfc) {
974 ipxitf_put(intrfc);
975 goto out;
976 }
977
978 if (intrfc)
979 ipxitf_put(intrfc);
980
981 dev = dev_get_by_name(&init_net, idef->ipx_device);
982 rc = -ENODEV;
983 if (!dev)
984 goto out;
985
986 switch (idef->ipx_dlink_type) {
987 case IPX_FRAME_TR_8022:
988 printk(KERN_WARNING "IPX frame type 802.2TR is "
989 "obsolete Use 802.2 instead.\n");
990 /* fall through */
991 case IPX_FRAME_8022:
992 dlink_type = htons(ETH_P_802_2);
993 datalink = p8022_datalink;
994 break;
995 case IPX_FRAME_ETHERII:
996 if (dev->type != ARPHRD_IEEE802) {
997 dlink_type = htons(ETH_P_IPX);
998 datalink = pEII_datalink;
999 break;
1000 } else
1001 printk(KERN_WARNING "IPX frame type EtherII over "
1002 "token-ring is obsolete. Use SNAP "
1003 "instead.\n");
1004 /* fall through */
1005 case IPX_FRAME_SNAP:
1006 dlink_type = htons(ETH_P_SNAP);
1007 datalink = pSNAP_datalink;
1008 break;
1009 case IPX_FRAME_8023:
1010 dlink_type = htons(ETH_P_802_3);
1011 datalink = p8023_datalink;
1012 break;
1013 case IPX_FRAME_NONE:
1014 default:
1015 rc = -EPROTONOSUPPORT;
1016 goto out_dev;
1017 }
1018
1019 rc = -ENETDOWN;
1020 if (!(dev->flags & IFF_UP))
1021 goto out_dev;
1022
1023 /* Check addresses are suitable */
1024 rc = -EINVAL;
1025 if (dev->addr_len > IPX_NODE_LEN)
1026 goto out_dev;
1027
1028 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1029 if (!intrfc) {
1030 /* Ok now create */
1031 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1032 datalink, 0, dev->hard_header_len +
1033 datalink->header_length);
1034 rc = -EAGAIN;
1035 if (!intrfc)
1036 goto out_dev;
1037 /* Setup primary if necessary */
1038 if (idef->ipx_special == IPX_PRIMARY)
1039 ipx_primary_net = intrfc;
1040 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1041 IPX_NODE_LEN)) {
1042 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1043 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1044 dev->dev_addr, dev->addr_len);
1045 } else
1046 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1047 ipxitf_hold(intrfc);
1048 ipxitf_insert(intrfc);
1049 }
1050
1051
1052 /* If the network number is known, add a route */
1053 rc = 0;
1054 if (!intrfc->if_netnum)
1055 goto out_intrfc;
1056
1057 rc = ipxitf_add_local_route(intrfc);
1058 out_intrfc:
1059 ipxitf_put(intrfc);
1060 goto out;
1061 out_dev:
1062 dev_put(dev);
1063 out:
1064 return rc;
1065 }
1066
1067 static int ipxitf_delete(struct ipx_interface_definition *idef)
1068 {
1069 struct net_device *dev = NULL;
1070 __be16 dlink_type = 0;
1071 struct ipx_interface *intrfc;
1072 int rc = 0;
1073
1074 spin_lock_bh(&ipx_interfaces_lock);
1075 if (idef->ipx_special == IPX_INTERNAL) {
1076 if (ipx_internal_net) {
1077 __ipxitf_put(ipx_internal_net);
1078 goto out;
1079 }
1080 rc = -ENOENT;
1081 goto out;
1082 }
1083
1084 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1085 rc = -EPROTONOSUPPORT;
1086 if (!dlink_type)
1087 goto out;
1088
1089 dev = __dev_get_by_name(&init_net, idef->ipx_device);
1090 rc = -ENODEV;
1091 if (!dev)
1092 goto out;
1093
1094 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1095 rc = -EINVAL;
1096 if (!intrfc)
1097 goto out;
1098 __ipxitf_put(intrfc);
1099
1100 rc = 0;
1101 out:
1102 spin_unlock_bh(&ipx_interfaces_lock);
1103 return rc;
1104 }
1105
1106 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1107 __be16 dlink_type)
1108 {
1109 struct ipx_interface *intrfc = NULL;
1110 struct datalink_proto *datalink;
1111
1112 if (!dev)
1113 goto out;
1114
1115 /* Check addresses are suitable */
1116 if (dev->addr_len > IPX_NODE_LEN)
1117 goto out;
1118
1119 switch (ntohs(dlink_type)) {
1120 case ETH_P_IPX: datalink = pEII_datalink; break;
1121 case ETH_P_802_2: datalink = p8022_datalink; break;
1122 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1123 case ETH_P_802_3: datalink = p8023_datalink; break;
1124 default: goto out;
1125 }
1126
1127 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1128 dev->hard_header_len + datalink->header_length);
1129
1130 if (intrfc) {
1131 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1132 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1133 dev->dev_addr, dev->addr_len);
1134 spin_lock_init(&intrfc->if_sklist_lock);
1135 atomic_set(&intrfc->refcnt, 1);
1136 ipxitf_insert(intrfc);
1137 dev_hold(dev);
1138 }
1139
1140 out:
1141 return intrfc;
1142 }
1143
1144 static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1145 {
1146 int rc = -EINVAL;
1147 struct ifreq ifr;
1148 int val;
1149
1150 switch (cmd) {
1151 case SIOCSIFADDR: {
1152 struct sockaddr_ipx *sipx;
1153 struct ipx_interface_definition f;
1154
1155 rc = -EFAULT;
1156 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1157 break;
1158 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1159 rc = -EINVAL;
1160 if (sipx->sipx_family != AF_IPX)
1161 break;
1162 f.ipx_network = sipx->sipx_network;
1163 memcpy(f.ipx_device, ifr.ifr_name,
1164 sizeof(f.ipx_device));
1165 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1166 f.ipx_dlink_type = sipx->sipx_type;
1167 f.ipx_special = sipx->sipx_special;
1168
1169 if (sipx->sipx_action == IPX_DLTITF)
1170 rc = ipxitf_delete(&f);
1171 else
1172 rc = ipxitf_create(&f);
1173 break;
1174 }
1175 case SIOCGIFADDR: {
1176 struct sockaddr_ipx *sipx;
1177 struct ipx_interface *ipxif;
1178 struct net_device *dev;
1179
1180 rc = -EFAULT;
1181 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1182 break;
1183 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1184 dev = __dev_get_by_name(&init_net, ifr.ifr_name);
1185 rc = -ENODEV;
1186 if (!dev)
1187 break;
1188 ipxif = ipxitf_find_using_phys(dev,
1189 ipx_map_frame_type(sipx->sipx_type));
1190 rc = -EADDRNOTAVAIL;
1191 if (!ipxif)
1192 break;
1193
1194 sipx->sipx_family = AF_IPX;
1195 sipx->sipx_network = ipxif->if_netnum;
1196 memcpy(sipx->sipx_node, ipxif->if_node,
1197 sizeof(sipx->sipx_node));
1198 rc = -EFAULT;
1199 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1200 break;
1201 ipxitf_put(ipxif);
1202 rc = 0;
1203 break;
1204 }
1205 case SIOCAIPXITFCRT:
1206 rc = -EFAULT;
1207 if (get_user(val, (unsigned char __user *) arg))
1208 break;
1209 rc = 0;
1210 ipxcfg_auto_create_interfaces = val;
1211 break;
1212 case SIOCAIPXPRISLT:
1213 rc = -EFAULT;
1214 if (get_user(val, (unsigned char __user *) arg))
1215 break;
1216 rc = 0;
1217 ipxcfg_set_auto_select(val);
1218 break;
1219 }
1220
1221 return rc;
1222 }
1223
1224 /*
1225 * Checksum routine for IPX
1226 */
1227
1228 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1229 /* This functions should *not* mess with packet contents */
1230
1231 __be16 ipx_cksum(struct ipxhdr *packet, int length)
1232 {
1233 /*
1234 * NOTE: sum is a net byte order quantity, which optimizes the
1235 * loop. This only works on big and little endian machines. (I
1236 * don't know of a machine that isn't.)
1237 */
1238 /* handle the first 3 words separately; checksum should be skipped
1239 * and ipx_tctrl masked out */
1240 __u16 *p = (__u16 *)packet;
1241 __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff));
1242 __u32 i = (length >> 1) - 3; /* Number of remaining complete words */
1243
1244 /* Loop through them */
1245 p += 3;
1246 while (i--)
1247 sum += *p++;
1248
1249 /* Add on the last part word if it exists */
1250 if (packet->ipx_pktsize & htons(1))
1251 sum += (__force u16)htons(0xff00) & *p;
1252
1253 /* Do final fixup */
1254 sum = (sum & 0xffff) + (sum >> 16);
1255
1256 /* It's a pity there's no concept of carry in C */
1257 if (sum >= 0x10000)
1258 sum++;
1259
1260 /*
1261 * Leave 0 alone; we don't want 0xffff here. Note that we can't get
1262 * here with 0x10000, so this check is the same as ((__u16)sum)
1263 */
1264 if (sum)
1265 sum = ~sum;
1266
1267 return (__force __be16)sum;
1268 }
1269
1270 const char *ipx_frame_name(__be16 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, unsigned 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 net *net, struct socket *sock, int protocol)
1356 {
1357 int rc = -ESOCKTNOSUPPORT;
1358 struct sock *sk;
1359
1360 if (net != &init_net)
1361 return -EAFNOSUPPORT;
1362
1363 /*
1364 * SPX support is not anymore in the kernel sources. If you want to
1365 * ressurrect it, completing it and making it understand shared skbs,
1366 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1367 * tree.
1368 */
1369 if (sock->type != SOCK_DGRAM)
1370 goto out;
1371
1372 rc = -ENOMEM;
1373 sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto);
1374 if (!sk)
1375 goto out;
1376
1377 sk_refcnt_debug_inc(sk);
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 sk_refcnt_debug_release(sk);
1399 ipx_destroy_socket(sk);
1400 out:
1401 return 0;
1402 }
1403
1404 /* caller must hold a reference to intrfc */
1405
1406 static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
1407 {
1408 unsigned short socketNum = intrfc->if_sknum;
1409
1410 spin_lock_bh(&intrfc->if_sklist_lock);
1411
1412 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1413 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1414
1415 while (__ipxitf_find_socket(intrfc, htons(socketNum)))
1416 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1417 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1418 else
1419 socketNum++;
1420
1421 spin_unlock_bh(&intrfc->if_sklist_lock);
1422 intrfc->if_sknum = socketNum;
1423
1424 return htons(socketNum);
1425 }
1426
1427 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1428 {
1429 struct sock *sk = sock->sk;
1430 struct ipx_sock *ipxs = ipx_sk(sk);
1431 struct ipx_interface *intrfc;
1432 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1433 int rc = -EINVAL;
1434
1435 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1436 goto out;
1437
1438 intrfc = ipxitf_find_using_net(addr->sipx_network);
1439 rc = -EADDRNOTAVAIL;
1440 if (!intrfc)
1441 goto out;
1442
1443 if (!addr->sipx_port) {
1444 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1445 rc = -EINVAL;
1446 if (!addr->sipx_port)
1447 goto out_put;
1448 }
1449
1450 /* protect IPX system stuff like routing/sap */
1451 rc = -EACCES;
1452 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1453 !capable(CAP_NET_ADMIN))
1454 goto out_put;
1455
1456 ipxs->port = addr->sipx_port;
1457
1458 #ifdef CONFIG_IPX_INTERN
1459 if (intrfc == ipx_internal_net) {
1460 /* The source address is to be set explicitly if the
1461 * socket is to be bound on the internal network. If a
1462 * node number 0 was specified, the default is used.
1463 */
1464
1465 rc = -EINVAL;
1466 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1467 goto out_put;
1468 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1469 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1470 else
1471 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1472
1473 rc = -EADDRINUSE;
1474 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1475 ipxs->port)) {
1476 SOCK_DEBUG(sk,
1477 "IPX: bind failed because port %X in use.\n",
1478 ntohs(addr->sipx_port));
1479 goto out_put;
1480 }
1481 } else {
1482 /* Source addresses are easy. It must be our
1483 * network:node pair for an interface routed to IPX
1484 * with the ipx routing ioctl()
1485 */
1486
1487 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1488
1489 rc = -EADDRINUSE;
1490 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1491 SOCK_DEBUG(sk,
1492 "IPX: bind failed because port %X in use.\n",
1493 ntohs(addr->sipx_port));
1494 goto out_put;
1495 }
1496 }
1497
1498 #else /* !def CONFIG_IPX_INTERN */
1499
1500 /* Source addresses are easy. It must be our network:node pair for
1501 an interface routed to IPX with the ipx routing ioctl() */
1502
1503 rc = -EADDRINUSE;
1504 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1505 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1506 ntohs((int)addr->sipx_port));
1507 goto out_put;
1508 }
1509
1510 #endif /* CONFIG_IPX_INTERN */
1511
1512 ipxitf_insert_socket(intrfc, sk);
1513 sock_reset_flag(sk, SOCK_ZAPPED);
1514
1515 rc = 0;
1516 out_put:
1517 ipxitf_put(intrfc);
1518 out:
1519 return rc;
1520 }
1521
1522 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1523 int addr_len, int flags)
1524 {
1525 struct sock *sk = sock->sk;
1526 struct ipx_sock *ipxs = ipx_sk(sk);
1527 struct sockaddr_ipx *addr;
1528 int rc = -EINVAL;
1529 struct ipx_route *rt;
1530
1531 sk->sk_state = TCP_CLOSE;
1532 sock->state = SS_UNCONNECTED;
1533
1534 if (addr_len != sizeof(*addr))
1535 goto out;
1536 addr = (struct sockaddr_ipx *)uaddr;
1537
1538 /* put the autobinding in */
1539 if (!ipxs->port) {
1540 struct sockaddr_ipx uaddr;
1541
1542 uaddr.sipx_port = 0;
1543 uaddr.sipx_network = 0;
1544
1545 #ifdef CONFIG_IPX_INTERN
1546 rc = -ENETDOWN;
1547 if (!ipxs->intrfc)
1548 goto out; /* Someone zonked the iface */
1549 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1550 IPX_NODE_LEN);
1551 #endif /* CONFIG_IPX_INTERN */
1552
1553 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1554 sizeof(struct sockaddr_ipx));
1555 if (rc)
1556 goto out;
1557 }
1558
1559 /* We can either connect to primary network or somewhere
1560 * we can route to */
1561 rt = ipxrtr_lookup(addr->sipx_network);
1562 rc = -ENETUNREACH;
1563 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1564 goto out;
1565
1566 ipxs->dest_addr.net = addr->sipx_network;
1567 ipxs->dest_addr.sock = addr->sipx_port;
1568 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1569 ipxs->type = addr->sipx_type;
1570
1571 if (sock->type == SOCK_DGRAM) {
1572 sock->state = SS_CONNECTED;
1573 sk->sk_state = TCP_ESTABLISHED;
1574 }
1575
1576 if (rt)
1577 ipxrtr_put(rt);
1578 rc = 0;
1579 out:
1580 return rc;
1581 }
1582
1583
1584 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1585 int *uaddr_len, int peer)
1586 {
1587 struct ipx_address *addr;
1588 struct sockaddr_ipx sipx;
1589 struct sock *sk = sock->sk;
1590 struct ipx_sock *ipxs = ipx_sk(sk);
1591 int rc;
1592
1593 *uaddr_len = sizeof(struct sockaddr_ipx);
1594
1595 if (peer) {
1596 rc = -ENOTCONN;
1597 if (sk->sk_state != TCP_ESTABLISHED)
1598 goto out;
1599
1600 addr = &ipxs->dest_addr;
1601 sipx.sipx_network = addr->net;
1602 sipx.sipx_port = addr->sock;
1603 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1604 } else {
1605 if (ipxs->intrfc) {
1606 sipx.sipx_network = ipxs->intrfc->if_netnum;
1607 #ifdef CONFIG_IPX_INTERN
1608 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1609 #else
1610 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1611 IPX_NODE_LEN);
1612 #endif /* CONFIG_IPX_INTERN */
1613
1614 } else {
1615 sipx.sipx_network = 0;
1616 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1617 }
1618
1619 sipx.sipx_port = ipxs->port;
1620 }
1621
1622 sipx.sipx_family = AF_IPX;
1623 sipx.sipx_type = ipxs->type;
1624 sipx.sipx_zero = 0;
1625 memcpy(uaddr, &sipx, sizeof(sipx));
1626
1627 rc = 0;
1628 out:
1629 return rc;
1630 }
1631
1632 static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1633 {
1634 /* NULL here for pt means the packet was looped back */
1635 struct ipx_interface *intrfc;
1636 struct ipxhdr *ipx;
1637 u16 ipx_pktsize;
1638 int rc = 0;
1639
1640 if (!net_eq(dev_net(dev), &init_net))
1641 goto drop;
1642
1643 /* Not ours */
1644 if (skb->pkt_type == PACKET_OTHERHOST)
1645 goto drop;
1646
1647 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1648 goto out;
1649
1650 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1651 goto drop;
1652
1653 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
1654
1655 /* Too small or invalid header? */
1656 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1657 !pskb_may_pull(skb, ipx_pktsize))
1658 goto drop;
1659
1660 ipx = ipx_hdr(skb);
1661 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1662 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1663 goto drop;
1664
1665 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1666 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1667 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1668
1669 /* Determine what local ipx endpoint this is */
1670 intrfc = ipxitf_find_using_phys(dev, pt->type);
1671 if (!intrfc) {
1672 if (ipxcfg_auto_create_interfaces &&
1673 IPX_SKB_CB(skb)->ipx_dest_net) {
1674 intrfc = ipxitf_auto_create(dev, pt->type);
1675 if (intrfc)
1676 ipxitf_hold(intrfc);
1677 }
1678
1679 if (!intrfc) /* Not one of ours */
1680 /* or invalid packet for auto creation */
1681 goto drop;
1682 }
1683
1684 rc = ipxitf_rcv(intrfc, skb);
1685 ipxitf_put(intrfc);
1686 goto out;
1687 drop:
1688 kfree_skb(skb);
1689 out:
1690 return rc;
1691 }
1692
1693 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1694 struct msghdr *msg, size_t len)
1695 {
1696 struct sock *sk = sock->sk;
1697 struct ipx_sock *ipxs = ipx_sk(sk);
1698 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1699 struct sockaddr_ipx local_sipx;
1700 int rc = -EINVAL;
1701 int flags = msg->msg_flags;
1702
1703 /* Socket gets bound below anyway */
1704 /* if (sk->sk_zapped)
1705 return -EIO; */ /* Socket not bound */
1706 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1707 goto out;
1708
1709 /* Max possible packet size limited by 16 bit pktsize in header */
1710 if (len >= 65535 - sizeof(struct ipxhdr))
1711 goto out;
1712
1713 if (usipx) {
1714 if (!ipxs->port) {
1715 struct sockaddr_ipx uaddr;
1716
1717 uaddr.sipx_port = 0;
1718 uaddr.sipx_network = 0;
1719 #ifdef CONFIG_IPX_INTERN
1720 rc = -ENETDOWN;
1721 if (!ipxs->intrfc)
1722 goto out; /* Someone zonked the iface */
1723 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1724 IPX_NODE_LEN);
1725 #endif
1726 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1727 sizeof(struct sockaddr_ipx));
1728 if (rc)
1729 goto out;
1730 }
1731
1732 rc = -EINVAL;
1733 if (msg->msg_namelen < sizeof(*usipx) ||
1734 usipx->sipx_family != AF_IPX)
1735 goto out;
1736 } else {
1737 rc = -ENOTCONN;
1738 if (sk->sk_state != TCP_ESTABLISHED)
1739 goto out;
1740
1741 usipx = &local_sipx;
1742 usipx->sipx_family = AF_IPX;
1743 usipx->sipx_type = ipxs->type;
1744 usipx->sipx_port = ipxs->dest_addr.sock;
1745 usipx->sipx_network = ipxs->dest_addr.net;
1746 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1747 }
1748
1749 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1750 flags & MSG_DONTWAIT);
1751 if (rc >= 0)
1752 rc = len;
1753 out:
1754 return rc;
1755 }
1756
1757
1758 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1759 struct msghdr *msg, size_t size, int flags)
1760 {
1761 struct sock *sk = sock->sk;
1762 struct ipx_sock *ipxs = ipx_sk(sk);
1763 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1764 struct ipxhdr *ipx = NULL;
1765 struct sk_buff *skb;
1766 int copied, rc;
1767
1768 /* put the autobinding in */
1769 if (!ipxs->port) {
1770 struct sockaddr_ipx uaddr;
1771
1772 uaddr.sipx_port = 0;
1773 uaddr.sipx_network = 0;
1774
1775 #ifdef CONFIG_IPX_INTERN
1776 rc = -ENETDOWN;
1777 if (!ipxs->intrfc)
1778 goto out; /* Someone zonked the iface */
1779 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1780 #endif /* CONFIG_IPX_INTERN */
1781
1782 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1783 sizeof(struct sockaddr_ipx));
1784 if (rc)
1785 goto out;
1786 }
1787
1788 rc = -ENOTCONN;
1789 if (sock_flag(sk, SOCK_ZAPPED))
1790 goto out;
1791
1792 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1793 flags & MSG_DONTWAIT, &rc);
1794 if (!skb)
1795 goto out;
1796
1797 ipx = ipx_hdr(skb);
1798 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1799 if (copied > size) {
1800 copied = size;
1801 msg->msg_flags |= MSG_TRUNC;
1802 }
1803
1804 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1805 copied);
1806 if (rc)
1807 goto out_free;
1808 if (skb->tstamp.tv64)
1809 sk->sk_stamp = skb->tstamp;
1810
1811 msg->msg_namelen = sizeof(*sipx);
1812
1813 if (sipx) {
1814 sipx->sipx_family = AF_IPX;
1815 sipx->sipx_port = ipx->ipx_source.sock;
1816 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1817 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1818 sipx->sipx_type = ipx->ipx_type;
1819 sipx->sipx_zero = 0;
1820 }
1821 rc = copied;
1822
1823 out_free:
1824 skb_free_datagram(sk, skb);
1825 out:
1826 return rc;
1827 }
1828
1829
1830 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1831 {
1832 int rc = 0;
1833 long amount = 0;
1834 struct sock *sk = sock->sk;
1835 void __user *argp = (void __user *)arg;
1836
1837 switch (cmd) {
1838 case TIOCOUTQ:
1839 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1840 if (amount < 0)
1841 amount = 0;
1842 rc = put_user(amount, (int __user *)argp);
1843 break;
1844 case TIOCINQ: {
1845 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1846 /* These two are safe on a single CPU system as only
1847 * user tasks fiddle here */
1848 if (skb)
1849 amount = skb->len - sizeof(struct ipxhdr);
1850 rc = put_user(amount, (int __user *)argp);
1851 break;
1852 }
1853 case SIOCADDRT:
1854 case SIOCDELRT:
1855 rc = -EPERM;
1856 if (capable(CAP_NET_ADMIN))
1857 rc = ipxrtr_ioctl(cmd, argp);
1858 break;
1859 case SIOCSIFADDR:
1860 case SIOCAIPXITFCRT:
1861 case SIOCAIPXPRISLT:
1862 rc = -EPERM;
1863 if (!capable(CAP_NET_ADMIN))
1864 break;
1865 case SIOCGIFADDR:
1866 rc = ipxitf_ioctl(cmd, argp);
1867 break;
1868 case SIOCIPXCFGDATA:
1869 rc = ipxcfg_get_config_data(argp);
1870 break;
1871 case SIOCIPXNCPCONN:
1872 /*
1873 * This socket wants to take care of the NCP connection
1874 * handed to us in arg.
1875 */
1876 rc = -EPERM;
1877 if (!capable(CAP_NET_ADMIN))
1878 break;
1879 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1880 (const unsigned short __user *)argp);
1881 break;
1882 case SIOCGSTAMP:
1883 rc = -EINVAL;
1884 if (sk)
1885 rc = sock_get_timestamp(sk, argp);
1886 break;
1887 case SIOCGIFDSTADDR:
1888 case SIOCSIFDSTADDR:
1889 case SIOCGIFBRDADDR:
1890 case SIOCSIFBRDADDR:
1891 case SIOCGIFNETMASK:
1892 case SIOCSIFNETMASK:
1893 rc = -EINVAL;
1894 break;
1895 default:
1896 rc = -ENOIOCTLCMD;
1897 break;
1898 }
1899
1900 return rc;
1901 }
1902
1903
1904 #ifdef CONFIG_COMPAT
1905 static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1906 {
1907 /*
1908 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1909 * commands is handled by generic ioctl code. As these commands are
1910 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1911 * code.
1912 */
1913 switch (cmd) {
1914 case SIOCAIPXITFCRT:
1915 case SIOCAIPXPRISLT:
1916 case SIOCIPXCFGDATA:
1917 case SIOCIPXNCPCONN:
1918 return ipx_ioctl(sock, cmd, arg);
1919 default:
1920 return -ENOIOCTLCMD;
1921 }
1922 }
1923 #endif
1924
1925
1926 /*
1927 * Socket family declarations
1928 */
1929
1930 static struct net_proto_family ipx_family_ops = {
1931 .family = PF_IPX,
1932 .create = ipx_create,
1933 .owner = THIS_MODULE,
1934 };
1935
1936 static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
1937 .family = PF_IPX,
1938 .owner = THIS_MODULE,
1939 .release = ipx_release,
1940 .bind = ipx_bind,
1941 .connect = ipx_connect,
1942 .socketpair = sock_no_socketpair,
1943 .accept = sock_no_accept,
1944 .getname = ipx_getname,
1945 .poll = datagram_poll,
1946 .ioctl = ipx_ioctl,
1947 #ifdef CONFIG_COMPAT
1948 .compat_ioctl = ipx_compat_ioctl,
1949 #endif
1950 .listen = sock_no_listen,
1951 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1952 .setsockopt = ipx_setsockopt,
1953 .getsockopt = ipx_getsockopt,
1954 .sendmsg = ipx_sendmsg,
1955 .recvmsg = ipx_recvmsg,
1956 .mmap = sock_no_mmap,
1957 .sendpage = sock_no_sendpage,
1958 };
1959
1960 SOCKOPS_WRAP(ipx_dgram, PF_IPX);
1961
1962 static struct packet_type ipx_8023_packet_type __read_mostly = {
1963 .type = cpu_to_be16(ETH_P_802_3),
1964 .func = ipx_rcv,
1965 };
1966
1967 static struct packet_type ipx_dix_packet_type __read_mostly = {
1968 .type = cpu_to_be16(ETH_P_IPX),
1969 .func = ipx_rcv,
1970 };
1971
1972 static struct notifier_block ipx_dev_notifier = {
1973 .notifier_call = ipxitf_device_event,
1974 };
1975
1976 extern struct datalink_proto *make_EII_client(void);
1977 extern void destroy_EII_client(struct datalink_proto *);
1978
1979 static const unsigned char ipx_8022_type = 0xE0;
1980 static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1981 static const char ipx_EII_err_msg[] __initconst =
1982 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1983 static const char ipx_8023_err_msg[] __initconst =
1984 KERN_CRIT "IPX: Unable to register with 802.3\n";
1985 static const char ipx_llc_err_msg[] __initconst =
1986 KERN_CRIT "IPX: Unable to register with 802.2\n";
1987 static const char ipx_snap_err_msg[] __initconst =
1988 KERN_CRIT "IPX: Unable to register with SNAP\n";
1989
1990 static int __init ipx_init(void)
1991 {
1992 int rc = proto_register(&ipx_proto, 1);
1993
1994 if (rc != 0)
1995 goto out;
1996
1997 sock_register(&ipx_family_ops);
1998
1999 pEII_datalink = make_EII_client();
2000 if (pEII_datalink)
2001 dev_add_pack(&ipx_dix_packet_type);
2002 else
2003 printk(ipx_EII_err_msg);
2004
2005 p8023_datalink = make_8023_client();
2006 if (p8023_datalink)
2007 dev_add_pack(&ipx_8023_packet_type);
2008 else
2009 printk(ipx_8023_err_msg);
2010
2011 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2012 if (!p8022_datalink)
2013 printk(ipx_llc_err_msg);
2014
2015 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2016 if (!pSNAP_datalink)
2017 printk(ipx_snap_err_msg);
2018
2019 register_netdevice_notifier(&ipx_dev_notifier);
2020 ipx_register_sysctl();
2021 ipx_proc_init();
2022 out:
2023 return rc;
2024 }
2025
2026 static void __exit ipx_proto_finito(void)
2027 {
2028 ipx_proc_exit();
2029 ipx_unregister_sysctl();
2030
2031 unregister_netdevice_notifier(&ipx_dev_notifier);
2032
2033 ipxitf_cleanup();
2034
2035 if (pSNAP_datalink) {
2036 unregister_snap_client(pSNAP_datalink);
2037 pSNAP_datalink = NULL;
2038 }
2039
2040 if (p8022_datalink) {
2041 unregister_8022_client(p8022_datalink);
2042 p8022_datalink = NULL;
2043 }
2044
2045 dev_remove_pack(&ipx_8023_packet_type);
2046 if (p8023_datalink) {
2047 destroy_8023_client(p8023_datalink);
2048 p8023_datalink = NULL;
2049 }
2050
2051 dev_remove_pack(&ipx_dix_packet_type);
2052 if (pEII_datalink) {
2053 destroy_EII_client(pEII_datalink);
2054 pEII_datalink = NULL;
2055 }
2056
2057 proto_unregister(&ipx_proto);
2058 sock_unregister(ipx_family_ops.family);
2059 }
2060
2061 module_init(ipx_init);
2062 module_exit(ipx_proto_finito);
2063 MODULE_LICENSE("GPL");
2064 MODULE_ALIAS_NETPROTO(PF_IPX);
WandBoard kernel