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sysctl: ipv6 route flushing (kill binary path)
[wrt350n-kernel.git] / net / ipx / af_ipx.c
blob29b063d4312052cefd1a9bbdfd02b62d8b212211
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/socket.h>
45 #include <linux/sockios.h>
46 #include <linux/string.h>
47 #include <linux/types.h>
48 #include <linux/termios.h>
49
50 #include <net/ipx.h>
51 #include <net/p8022.h>
52 #include <net/psnap.h>
53 #include <net/sock.h>
54 #include <net/tcp_states.h>
55
56 #include <asm/uaccess.h>
57
58 #ifdef CONFIG_SYSCTL
59 extern void ipx_register_sysctl(void);
60 extern void ipx_unregister_sysctl(void);
61 #else
62 #define ipx_register_sysctl()
63 #define ipx_unregister_sysctl()
64 #endif
65
66 /* Configuration Variables */
67 static unsigned char ipxcfg_max_hops = 16;
68 static char ipxcfg_auto_select_primary;
69 static char ipxcfg_auto_create_interfaces;
70 int sysctl_ipx_pprop_broadcasting = 1;
71
72 /* Global Variables */
73 static struct datalink_proto *p8022_datalink;
74 static struct datalink_proto *pEII_datalink;
75 static struct datalink_proto *p8023_datalink;
76 static struct datalink_proto *pSNAP_datalink;
77
78 static const struct proto_ops ipx_dgram_ops;
79
80 LIST_HEAD(ipx_interfaces);
81 DEFINE_SPINLOCK(ipx_interfaces_lock);
82
83 struct ipx_interface *ipx_primary_net;
84 struct ipx_interface *ipx_internal_net;
85
86 extern int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
87 unsigned char *node);
88 extern void ipxrtr_del_routes(struct ipx_interface *intrfc);
89 extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
90 struct iovec *iov, size_t len, int noblock);
91 extern int ipxrtr_route_skb(struct sk_buff *skb);
92 extern struct ipx_route *ipxrtr_lookup(__be32 net);
93 extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
94
95 #undef IPX_REFCNT_DEBUG
96 #ifdef IPX_REFCNT_DEBUG
97 atomic_t ipx_sock_nr;
98 #endif
99
100 struct ipx_interface *ipx_interfaces_head(void)
101 {
102 struct ipx_interface *rc = NULL;
103
104 if (!list_empty(&ipx_interfaces))
105 rc = list_entry(ipx_interfaces.next,
106 struct ipx_interface, node);
107 return rc;
108 }
109
110 static void ipxcfg_set_auto_select(char val)
111 {
112 ipxcfg_auto_select_primary = val;
113 if (val && !ipx_primary_net)
114 ipx_primary_net = ipx_interfaces_head();
115 }
116
117 static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
118 {
119 struct ipx_config_data vals;
120
121 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
122 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
123
124 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
125 }
126
127 /*
128 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
129 * handler using this technique. They can be added although we do not
130 * use this facility.
131 */
132
133 static void ipx_remove_socket(struct sock *sk)
134 {
135 /* Determine interface with which socket is associated */
136 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
137
138 if (!intrfc)
139 goto out;
140
141 ipxitf_hold(intrfc);
142 spin_lock_bh(&intrfc->if_sklist_lock);
143 sk_del_node_init(sk);
144 spin_unlock_bh(&intrfc->if_sklist_lock);
145 ipxitf_put(intrfc);
146 out:
147 return;
148 }
149
150 static void ipx_destroy_socket(struct sock *sk)
151 {
152 ipx_remove_socket(sk);
153 skb_queue_purge(&sk->sk_receive_queue);
154 #ifdef IPX_REFCNT_DEBUG
155 atomic_dec(&ipx_sock_nr);
156 printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk,
157 atomic_read(&ipx_sock_nr));
158 if (atomic_read(&sk->sk_refcnt) != 1)
159 printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n",
160 sk, atomic_read(&sk->sk_refcnt));
161 #endif
162 sock_put(sk);
163 }
164
165 /*
166 * The following code is used to support IPX Interfaces (IPXITF). An
167 * IPX interface is defined by a physical device and a frame type.
168 */
169
170 /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
171
172 static void ipxitf_clear_primary_net(void)
173 {
174 ipx_primary_net = NULL;
175 if (ipxcfg_auto_select_primary)
176 ipx_primary_net = ipx_interfaces_head();
177 }
178
179 static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
180 __be16 datalink)
181 {
182 struct ipx_interface *i;
183
184 list_for_each_entry(i, &ipx_interfaces, node)
185 if (i->if_dev == dev && i->if_dlink_type == datalink)
186 goto out;
187 i = NULL;
188 out:
189 return i;
190 }
191
192 static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
193 __be16 datalink)
194 {
195 struct ipx_interface *i;
196
197 spin_lock_bh(&ipx_interfaces_lock);
198 i = __ipxitf_find_using_phys(dev, datalink);
199 if (i)
200 ipxitf_hold(i);
201 spin_unlock_bh(&ipx_interfaces_lock);
202 return i;
203 }
204
205 struct ipx_interface *ipxitf_find_using_net(__be32 net)
206 {
207 struct ipx_interface *i;
208
209 spin_lock_bh(&ipx_interfaces_lock);
210 if (net) {
211 list_for_each_entry(i, &ipx_interfaces, node)
212 if (i->if_netnum == net)
213 goto hold;
214 i = NULL;
215 goto unlock;
216 }
217
218 i = ipx_primary_net;
219 if (i)
220 hold:
221 ipxitf_hold(i);
222 unlock:
223 spin_unlock_bh(&ipx_interfaces_lock);
224 return i;
225 }
226
227 /* Sockets are bound to a particular IPX interface. */
228 static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
229 {
230 ipxitf_hold(intrfc);
231 spin_lock_bh(&intrfc->if_sklist_lock);
232 ipx_sk(sk)->intrfc = intrfc;
233 sk_add_node(sk, &intrfc->if_sklist);
234 spin_unlock_bh(&intrfc->if_sklist_lock);
235 ipxitf_put(intrfc);
236 }
237
238 /* caller must hold intrfc->if_sklist_lock */
239 static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
240 __be16 port)
241 {
242 struct sock *s;
243 struct hlist_node *node;
244
245 sk_for_each(s, node, &intrfc->if_sklist)
246 if (ipx_sk(s)->port == port)
247 goto found;
248 s = NULL;
249 found:
250 return s;
251 }
252
253 /* caller must hold a reference to intrfc */
254 static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
255 __be16 port)
256 {
257 struct sock *s;
258
259 spin_lock_bh(&intrfc->if_sklist_lock);
260 s = __ipxitf_find_socket(intrfc, port);
261 if (s)
262 sock_hold(s);
263 spin_unlock_bh(&intrfc->if_sklist_lock);
264
265 return s;
266 }
267
268 #ifdef CONFIG_IPX_INTERN
269 static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
270 unsigned char *ipx_node,
271 __be16 port)
272 {
273 struct sock *s;
274 struct hlist_node *node;
275
276 ipxitf_hold(intrfc);
277 spin_lock_bh(&intrfc->if_sklist_lock);
278
279 sk_for_each(s, node, &intrfc->if_sklist) {
280 struct ipx_sock *ipxs = ipx_sk(s);
281
282 if (ipxs->port == port &&
283 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
284 goto found;
285 }
286 s = NULL;
287 found:
288 spin_unlock_bh(&intrfc->if_sklist_lock);
289 ipxitf_put(intrfc);
290 return s;
291 }
292 #endif
293
294 static void __ipxitf_down(struct ipx_interface *intrfc)
295 {
296 struct sock *s;
297 struct hlist_node *node, *t;
298
299 /* Delete all routes associated with this interface */
300 ipxrtr_del_routes(intrfc);
301
302 spin_lock_bh(&intrfc->if_sklist_lock);
303 /* error sockets */
304 sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
305 struct ipx_sock *ipxs = ipx_sk(s);
306
307 s->sk_err = ENOLINK;
308 s->sk_error_report(s);
309 ipxs->intrfc = NULL;
310 ipxs->port = 0;
311 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
312 sk_del_node_init(s);
313 }
314 INIT_HLIST_HEAD(&intrfc->if_sklist);
315 spin_unlock_bh(&intrfc->if_sklist_lock);
316
317 /* remove this interface from list */
318 list_del(&intrfc->node);
319
320 /* remove this interface from *special* networks */
321 if (intrfc == ipx_primary_net)
322 ipxitf_clear_primary_net();
323 if (intrfc == ipx_internal_net)
324 ipx_internal_net = NULL;
325
326 if (intrfc->if_dev)
327 dev_put(intrfc->if_dev);
328 kfree(intrfc);
329 }
330
331 void ipxitf_down(struct ipx_interface *intrfc)
332 {
333 spin_lock_bh(&ipx_interfaces_lock);
334 __ipxitf_down(intrfc);
335 spin_unlock_bh(&ipx_interfaces_lock);
336 }
337
338 static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
339 {
340 if (atomic_dec_and_test(&intrfc->refcnt))
341 __ipxitf_down(intrfc);
342 }
343
344 static int ipxitf_device_event(struct notifier_block *notifier,
345 unsigned long event, void *ptr)
346 {
347 struct net_device *dev = ptr;
348 struct ipx_interface *i, *tmp;
349
350 if (dev->nd_net != &init_net)
351 return NOTIFY_DONE;
352
353 if (event != NETDEV_DOWN && event != NETDEV_UP)
354 goto out;
355
356 spin_lock_bh(&ipx_interfaces_lock);
357 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
358 if (i->if_dev == dev) {
359 if (event == NETDEV_UP)
360 ipxitf_hold(i);
361 else
362 __ipxitf_put(i);
363 }
364 spin_unlock_bh(&ipx_interfaces_lock);
365 out:
366 return NOTIFY_DONE;
367 }
368
369
370 static __exit void ipxitf_cleanup(void)
371 {
372 struct ipx_interface *i, *tmp;
373
374 spin_lock_bh(&ipx_interfaces_lock);
375 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
376 __ipxitf_put(i);
377 spin_unlock_bh(&ipx_interfaces_lock);
378 }
379
380 static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
381 {
382 if (sock_queue_rcv_skb(sock, skb) < 0)
383 kfree_skb(skb);
384 }
385
386 /*
387 * On input skb->sk is NULL. Nobody is charged for the memory.
388 */
389
390 /* caller must hold a reference to intrfc */
391
392 #ifdef CONFIG_IPX_INTERN
393 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
394 struct sk_buff *skb, int copy)
395 {
396 struct ipxhdr *ipx = ipx_hdr(skb);
397 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
398 IPX_NODE_LEN);
399 struct sock *s;
400 struct hlist_node *node;
401 int rc;
402
403 spin_lock_bh(&intrfc->if_sklist_lock);
404
405 sk_for_each(s, node, &intrfc->if_sklist) {
406 struct ipx_sock *ipxs = ipx_sk(s);
407
408 if (ipxs->port == ipx->ipx_dest.sock &&
409 (is_broadcast || !memcmp(ipx->ipx_dest.node,
410 ipxs->node, IPX_NODE_LEN))) {
411 /* We found a socket to which to send */
412 struct sk_buff *skb1;
413
414 if (copy) {
415 skb1 = skb_clone(skb, GFP_ATOMIC);
416 rc = -ENOMEM;
417 if (!skb1)
418 goto out;
419 } else {
420 skb1 = skb;
421 copy = 1; /* skb may only be used once */
422 }
423 ipxitf_def_skb_handler(s, skb1);
424
425 /* On an external interface, one socket can listen */
426 if (intrfc != ipx_internal_net)
427 break;
428 }
429 }
430
431 /* skb was solely for us, and we did not make a copy, so free it. */
432 if (!copy)
433 kfree_skb(skb);
434
435 rc = 0;
436 out:
437 spin_unlock_bh(&intrfc->if_sklist_lock);
438 return rc;
439 }
440 #else
441 static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
442 struct ipxhdr *ipx)
443 {
444 /* The packet's target is a NCP connection handler. We want to hand it
445 * to the correct socket directly within the kernel, so that the
446 * mars_nwe packet distribution process does not have to do it. Here we
447 * only care about NCP and BURST packets.
448 *
449 * You might call this a hack, but believe me, you do not want a
450 * complete NCP layer in the kernel, and this is VERY fast as well. */
451 struct sock *sk = NULL;
452 int connection = 0;
453 u8 *ncphdr = (u8 *)(ipx + 1);
454
455 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
456 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
457 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
458 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
459
460 if (connection) {
461 struct hlist_node *node;
462 /* Now we have to look for a special NCP connection handling
463 * socket. Only these sockets have ipx_ncp_conn != 0, set by
464 * SIOCIPXNCPCONN. */
465 spin_lock_bh(&intrfc->if_sklist_lock);
466 sk_for_each(sk, node, &intrfc->if_sklist)
467 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
468 sock_hold(sk);
469 goto found;
470 }
471 sk = NULL;
472 found:
473 spin_unlock_bh(&intrfc->if_sklist_lock);
474 }
475 return sk;
476 }
477
478 static int ipxitf_demux_socket(struct ipx_interface *intrfc,
479 struct sk_buff *skb, int copy)
480 {
481 struct ipxhdr *ipx = ipx_hdr(skb);
482 struct sock *sock1 = NULL, *sock2 = NULL;
483 struct sk_buff *skb1 = NULL, *skb2 = NULL;
484 int rc;
485
486 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
487 sock1 = ncp_connection_hack(intrfc, ipx);
488 if (!sock1)
489 /* No special socket found, forward the packet the normal way */
490 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
491
492 /*
493 * We need to check if there is a primary net and if
494 * this is addressed to one of the *SPECIAL* sockets because
495 * these need to be propagated to the primary net.
496 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
497 * 0x456(Diagnostic).
498 */
499
500 if (ipx_primary_net && intrfc != ipx_primary_net) {
501 const int dsock = ntohs(ipx->ipx_dest.sock);
502
503 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
504 /* The appropriate thing to do here is to dup the
505 * packet and route to the primary net interface via
506 * ipxitf_send; however, we'll cheat and just demux it
507 * here. */
508 sock2 = ipxitf_find_socket(ipx_primary_net,
509 ipx->ipx_dest.sock);
510 }
511
512 /*
513 * If there is nothing to do return. The kfree will cancel any charging.
514 */
515 rc = 0;
516 if (!sock1 && !sock2) {
517 if (!copy)
518 kfree_skb(skb);
519 goto out;
520 }
521
522 /*
523 * This next segment of code is a little awkward, but it sets it up
524 * so that the appropriate number of copies of the SKB are made and
525 * that skb1 and skb2 point to it (them) so that it (they) can be
526 * demuxed to sock1 and/or sock2. If we are unable to make enough
527 * copies, we do as much as is possible.
528 */
529
530 if (copy)
531 skb1 = skb_clone(skb, GFP_ATOMIC);
532 else
533 skb1 = skb;
534
535 rc = -ENOMEM;
536 if (!skb1)
537 goto out_put;
538
539 /* Do we need 2 SKBs? */
540 if (sock1 && sock2)
541 skb2 = skb_clone(skb1, GFP_ATOMIC);
542 else
543 skb2 = skb1;
544
545 if (sock1)
546 ipxitf_def_skb_handler(sock1, skb1);
547
548 if (!skb2)
549 goto out_put;
550
551 if (sock2)
552 ipxitf_def_skb_handler(sock2, skb2);
553
554 rc = 0;
555 out_put:
556 if (sock1)
557 sock_put(sock1);
558 if (sock2)
559 sock_put(sock2);
560 out:
561 return rc;
562 }
563 #endif /* CONFIG_IPX_INTERN */
564
565 static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
566 struct sk_buff *skb)
567 {
568 struct sk_buff *skb2;
569 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
570 int out_offset = intrfc->if_ipx_offset;
571 int len;
572
573 /* Hopefully, most cases */
574 if (in_offset >= out_offset)
575 return skb;
576
577 /* Need new SKB */
578 len = skb->len + out_offset;
579 skb2 = alloc_skb(len, GFP_ATOMIC);
580 if (skb2) {
581 skb_reserve(skb2, out_offset);
582 skb_reset_network_header(skb2);
583 skb_reset_transport_header(skb2);
584 skb_put(skb2, skb->len);
585 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
586 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
587 }
588 kfree_skb(skb);
589 return skb2;
590 }
591
592 /* caller must hold a reference to intrfc and the skb has to be unshared */
593 int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
594 {
595 struct ipxhdr *ipx = ipx_hdr(skb);
596 struct net_device *dev = intrfc->if_dev;
597 struct datalink_proto *dl = intrfc->if_dlink;
598 char dest_node[IPX_NODE_LEN];
599 int send_to_wire = 1;
600 int addr_len;
601
602 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
603 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
604 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
605
606 /* see if we need to include the netnum in the route list */
607 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
608 __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
609 sizeof(struct ipxhdr) +
610 IPX_SKB_CB(skb)->last_hop.index *
611 sizeof(__be32));
612 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
613 IPX_SKB_CB(skb)->last_hop.index = -1;
614 }
615
616 /*
617 * We need to know how many skbuffs it will take to send out this
618 * packet to avoid unnecessary copies.
619 */
620
621 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
622 send_to_wire = 0; /* No non looped */
623
624 /*
625 * See if this should be demuxed to sockets on this interface
626 *
627 * We want to ensure the original was eaten or that we only use
628 * up clones.
629 */
630
631 if (ipx->ipx_dest.net == intrfc->if_netnum) {
632 /*
633 * To our own node, loop and free the original.
634 * The internal net will receive on all node address.
635 */
636 if (intrfc == ipx_internal_net ||
637 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
638 /* Don't charge sender */
639 skb_orphan(skb);
640
641 /* Will charge receiver */
642 return ipxitf_demux_socket(intrfc, skb, 0);
643 }
644
645 /* Broadcast, loop and possibly keep to send on. */
646 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
647 if (!send_to_wire)
648 skb_orphan(skb);
649 ipxitf_demux_socket(intrfc, skb, send_to_wire);
650 if (!send_to_wire)
651 goto out;
652 }
653 }
654
655 /*
656 * If the originating net is not equal to our net; this is routed
657 * We are still charging the sender. Which is right - the driver
658 * free will handle this fairly.
659 */
660 if (ipx->ipx_source.net != intrfc->if_netnum) {
661 /*
662 * Unshare the buffer before modifying the count in
663 * case it's a flood or tcpdump
664 */
665 skb = skb_unshare(skb, GFP_ATOMIC);
666 if (!skb)
667 goto out;
668 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
669 send_to_wire = 0;
670 }
671
672 if (!send_to_wire) {
673 kfree_skb(skb);
674 goto out;
675 }
676
677 /* Determine the appropriate hardware address */
678 addr_len = dev->addr_len;
679 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
680 memcpy(dest_node, dev->broadcast, addr_len);
681 else
682 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
683
684 /* Make any compensation for differing physical/data link size */
685 skb = ipxitf_adjust_skbuff(intrfc, skb);
686 if (!skb)
687 goto out;
688
689 /* set up data link and physical headers */
690 skb->dev = dev;
691 skb->protocol = htons(ETH_P_IPX);
692
693 /* Send it out */
694 dl->request(dl, skb, dest_node);
695 out:
696 return 0;
697 }
698
699 static int ipxitf_add_local_route(struct ipx_interface *intrfc)
700 {
701 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
702 }
703
704 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
705 struct sk_buff *skb);
706 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
707
708 static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
709 {
710 struct ipxhdr *ipx = ipx_hdr(skb);
711 int rc = 0;
712
713 ipxitf_hold(intrfc);
714
715 /* See if we should update our network number */
716 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
717 ipxitf_discover_netnum(intrfc, skb);
718
719 IPX_SKB_CB(skb)->last_hop.index = -1;
720 if (ipx->ipx_type == IPX_TYPE_PPROP) {
721 rc = ipxitf_pprop(intrfc, skb);
722 if (rc)
723 goto out_free_skb;
724 }
725
726 /* local processing follows */
727 if (!IPX_SKB_CB(skb)->ipx_dest_net)
728 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
729 if (!IPX_SKB_CB(skb)->ipx_source_net)
730 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
731
732 /* it doesn't make sense to route a pprop packet, there's no meaning
733 * in the ipx_dest_net for such packets */
734 if (ipx->ipx_type != IPX_TYPE_PPROP &&
735 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
736 /* We only route point-to-point packets. */
737 if (skb->pkt_type == PACKET_HOST) {
738 skb = skb_unshare(skb, GFP_ATOMIC);
739 if (skb)
740 rc = ipxrtr_route_skb(skb);
741 goto out_intrfc;
742 }
743
744 goto out_free_skb;
745 }
746
747 /* see if we should keep it */
748 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
749 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
750 rc = ipxitf_demux_socket(intrfc, skb, 0);
751 goto out_intrfc;
752 }
753
754 /* we couldn't pawn it off so unload it */
755 out_free_skb:
756 kfree_skb(skb);
757 out_intrfc:
758 ipxitf_put(intrfc);
759 return rc;
760 }
761
762 static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
763 struct sk_buff *skb)
764 {
765 const struct ipx_cb *cb = IPX_SKB_CB(skb);
766
767 /* see if this is an intra packet: source_net == dest_net */
768 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
769 struct ipx_interface *i =
770 ipxitf_find_using_net(cb->ipx_source_net);
771 /* NB: NetWare servers lie about their hop count so we
772 * dropped the test based on it. This is the best way
773 * to determine this is a 0 hop count packet. */
774 if (!i) {
775 intrfc->if_netnum = cb->ipx_source_net;
776 ipxitf_add_local_route(intrfc);
777 } else {
778 printk(KERN_WARNING "IPX: Network number collision "
779 "%lx\n %s %s and %s %s\n",
780 (unsigned long) ntohl(cb->ipx_source_net),
781 ipx_device_name(i),
782 ipx_frame_name(i->if_dlink_type),
783 ipx_device_name(intrfc),
784 ipx_frame_name(intrfc->if_dlink_type));
785 ipxitf_put(i);
786 }
787 }
788 }
789
790 /**
791 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
792 * NetBIOS broadcasts
793 * @intrfc: IPX interface receiving this packet
794 * @skb: Received packet
795 *
796 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
797 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
798 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
799 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
800 * RIP and SAP Router Specification", Part Number 107-000029-001.
801 *
802 * If it is valid, check if we have pprop broadcasting enabled by the user,
803 * if not, just return zero for local processing.
804 *
805 * If it is enabled check the packet and don't broadcast it if we have already
806 * seen this packet.
807 *
808 * Broadcast: send it to the interfaces that aren't on the packet visited nets
809 * array, just after the IPX header.
810 *
811 * Returns -EINVAL for invalid packets, so that the calling function drops
812 * the packet without local processing. 0 if packet is to be locally processed.
813 */
814 static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
815 {
816 struct ipxhdr *ipx = ipx_hdr(skb);
817 int i, rc = -EINVAL;
818 struct ipx_interface *ifcs;
819 char *c;
820 __be32 *l;
821
822 /* Illegal packet - too many hops or too short */
823 /* We decide to throw it away: no broadcasting, no local processing.
824 * NetBIOS unaware implementations route them as normal packets -
825 * tctrl <= 15, any data payload... */
826 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
827 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
828 IPX_MAX_PPROP_HOPS * sizeof(u32))
829 goto out;
830 /* are we broadcasting this damn thing? */
831 rc = 0;
832 if (!sysctl_ipx_pprop_broadcasting)
833 goto out;
834 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
835 * process it locally. All previous hops broadcasted it, and process it
836 * locally. */
837 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
838 goto out;
839
840 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
841 l = (__be32 *) c;
842
843 /* Don't broadcast packet if already seen this net */
844 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
845 if (*l++ == intrfc->if_netnum)
846 goto out;
847
848 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
849 * position where we will insert recvd netnum into list, later on,
850 * in ipxitf_send */
851 IPX_SKB_CB(skb)->last_hop.index = i;
852 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
853 /* xmit on all other interfaces... */
854 spin_lock_bh(&ipx_interfaces_lock);
855 list_for_each_entry(ifcs, &ipx_interfaces, node) {
856 /* Except unconfigured interfaces */
857 if (!ifcs->if_netnum)
858 continue;
859
860 /* That aren't in the list */
861 if (ifcs == intrfc)
862 continue;
863 l = (__be32 *) c;
864 /* don't consider the last entry in the packet list,
865 * it is our netnum, and it is not there yet */
866 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
867 if (ifcs->if_netnum == *l++)
868 break;
869 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
870 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
871
872 if (s) {
873 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
874 ipxrtr_route_skb(s);
875 }
876 }
877 }
878 spin_unlock_bh(&ipx_interfaces_lock);
879 out:
880 return rc;
881 }
882
883 static void ipxitf_insert(struct ipx_interface *intrfc)
884 {
885 spin_lock_bh(&ipx_interfaces_lock);
886 list_add_tail(&intrfc->node, &ipx_interfaces);
887 spin_unlock_bh(&ipx_interfaces_lock);
888
889 if (ipxcfg_auto_select_primary && !ipx_primary_net)
890 ipx_primary_net = intrfc;
891 }
892
893 static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
894 __be16 dlink_type,
895 struct datalink_proto *dlink,
896 unsigned char internal,
897 int ipx_offset)
898 {
899 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
900
901 if (intrfc) {
902 intrfc->if_dev = dev;
903 intrfc->if_netnum = netnum;
904 intrfc->if_dlink_type = dlink_type;
905 intrfc->if_dlink = dlink;
906 intrfc->if_internal = internal;
907 intrfc->if_ipx_offset = ipx_offset;
908 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
909 INIT_HLIST_HEAD(&intrfc->if_sklist);
910 atomic_set(&intrfc->refcnt, 1);
911 spin_lock_init(&intrfc->if_sklist_lock);
912 }
913
914 return intrfc;
915 }
916
917 static int ipxitf_create_internal(struct ipx_interface_definition *idef)
918 {
919 struct ipx_interface *intrfc;
920 int rc = -EEXIST;
921
922 /* Only one primary network allowed */
923 if (ipx_primary_net)
924 goto out;
925
926 /* Must have a valid network number */
927 rc = -EADDRNOTAVAIL;
928 if (!idef->ipx_network)
929 goto out;
930 intrfc = ipxitf_find_using_net(idef->ipx_network);
931 rc = -EADDRINUSE;
932 if (intrfc) {
933 ipxitf_put(intrfc);
934 goto out;
935 }
936 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
937 rc = -EAGAIN;
938 if (!intrfc)
939 goto out;
940 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
941 ipx_internal_net = ipx_primary_net = intrfc;
942 ipxitf_hold(intrfc);
943 ipxitf_insert(intrfc);
944
945 rc = ipxitf_add_local_route(intrfc);
946 ipxitf_put(intrfc);
947 out:
948 return rc;
949 }
950
951 static __be16 ipx_map_frame_type(unsigned char type)
952 {
953 __be16 rc = 0;
954
955 switch (type) {
956 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
957 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
958 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
959 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
960 }
961
962 return rc;
963 }
964
965 static int ipxitf_create(struct ipx_interface_definition *idef)
966 {
967 struct net_device *dev;
968 __be16 dlink_type = 0;
969 struct datalink_proto *datalink = NULL;
970 struct ipx_interface *intrfc;
971 int rc;
972
973 if (idef->ipx_special == IPX_INTERNAL) {
974 rc = ipxitf_create_internal(idef);
975 goto out;
976 }
977
978 rc = -EEXIST;
979 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
980 goto out;
981
982 intrfc = ipxitf_find_using_net(idef->ipx_network);
983 rc = -EADDRINUSE;
984 if (idef->ipx_network && intrfc) {
985 ipxitf_put(intrfc);
986 goto out;
987 }
988
989 if (intrfc)
990 ipxitf_put(intrfc);
991
992 dev = dev_get_by_name(&init_net, idef->ipx_device);
993 rc = -ENODEV;
994 if (!dev)
995 goto out;
996
997 switch (idef->ipx_dlink_type) {
998 case IPX_FRAME_TR_8022:
999 printk(KERN_WARNING "IPX frame type 802.2TR is "
1000 "obsolete Use 802.2 instead.\n");
1001 /* fall through */
1002 case IPX_FRAME_8022:
1003 dlink_type = htons(ETH_P_802_2);
1004 datalink = p8022_datalink;
1005 break;
1006 case IPX_FRAME_ETHERII:
1007 if (dev->type != ARPHRD_IEEE802) {
1008 dlink_type = htons(ETH_P_IPX);
1009 datalink = pEII_datalink;
1010 break;
1011 } else
1012 printk(KERN_WARNING "IPX frame type EtherII over "
1013 "token-ring is obsolete. Use SNAP "
1014 "instead.\n");
1015 /* fall through */
1016 case IPX_FRAME_SNAP:
1017 dlink_type = htons(ETH_P_SNAP);
1018 datalink = pSNAP_datalink;
1019 break;
1020 case IPX_FRAME_8023:
1021 dlink_type = htons(ETH_P_802_3);
1022 datalink = p8023_datalink;
1023 break;
1024 case IPX_FRAME_NONE:
1025 default:
1026 rc = -EPROTONOSUPPORT;
1027 goto out_dev;
1028 }
1029
1030 rc = -ENETDOWN;
1031 if (!(dev->flags & IFF_UP))
1032 goto out_dev;
1033
1034 /* Check addresses are suitable */
1035 rc = -EINVAL;
1036 if (dev->addr_len > IPX_NODE_LEN)
1037 goto out_dev;
1038
1039 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1040 if (!intrfc) {
1041 /* Ok now create */
1042 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1043 datalink, 0, dev->hard_header_len +
1044 datalink->header_length);
1045 rc = -EAGAIN;
1046 if (!intrfc)
1047 goto out_dev;
1048 /* Setup primary if necessary */
1049 if (idef->ipx_special == IPX_PRIMARY)
1050 ipx_primary_net = intrfc;
1051 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1052 IPX_NODE_LEN)) {
1053 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1054 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1055 dev->dev_addr, dev->addr_len);
1056 } else
1057 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1058 ipxitf_hold(intrfc);
1059 ipxitf_insert(intrfc);
1060 }
1061
1062
1063 /* If the network number is known, add a route */
1064 rc = 0;
1065 if (!intrfc->if_netnum)
1066 goto out_intrfc;
1067
1068 rc = ipxitf_add_local_route(intrfc);
1069 out_intrfc:
1070 ipxitf_put(intrfc);
1071 goto out;
1072 out_dev:
1073 dev_put(dev);
1074 out:
1075 return rc;
1076 }
1077
1078 static int ipxitf_delete(struct ipx_interface_definition *idef)
1079 {
1080 struct net_device *dev = NULL;
1081 __be16 dlink_type = 0;
1082 struct ipx_interface *intrfc;
1083 int rc = 0;
1084
1085 spin_lock_bh(&ipx_interfaces_lock);
1086 if (idef->ipx_special == IPX_INTERNAL) {
1087 if (ipx_internal_net) {
1088 __ipxitf_put(ipx_internal_net);
1089 goto out;
1090 }
1091 rc = -ENOENT;
1092 goto out;
1093 }
1094
1095 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1096 rc = -EPROTONOSUPPORT;
1097 if (!dlink_type)
1098 goto out;
1099
1100 dev = __dev_get_by_name(&init_net, idef->ipx_device);
1101 rc = -ENODEV;
1102 if (!dev)
1103 goto out;
1104
1105 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1106 rc = -EINVAL;
1107 if (!intrfc)
1108 goto out;
1109 __ipxitf_put(intrfc);
1110
1111 rc = 0;
1112 out:
1113 spin_unlock_bh(&ipx_interfaces_lock);
1114 return rc;
1115 }
1116
1117 static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1118 __be16 dlink_type)
1119 {
1120 struct ipx_interface *intrfc = NULL;
1121 struct datalink_proto *datalink;
1122
1123 if (!dev)
1124 goto out;
1125
1126 /* Check addresses are suitable */
1127 if (dev->addr_len > IPX_NODE_LEN)
1128 goto out;
1129
1130 switch (ntohs(dlink_type)) {
1131 case ETH_P_IPX: datalink = pEII_datalink; break;
1132 case ETH_P_802_2: datalink = p8022_datalink; break;
1133 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1134 case ETH_P_802_3: datalink = p8023_datalink; break;
1135 default: goto out;
1136 }
1137
1138 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1139 dev->hard_header_len + datalink->header_length);
1140
1141 if (intrfc) {
1142 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1143 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1144 dev->dev_addr, dev->addr_len);
1145 spin_lock_init(&intrfc->if_sklist_lock);
1146 atomic_set(&intrfc->refcnt, 1);
1147 ipxitf_insert(intrfc);
1148 dev_hold(dev);
1149 }
1150
1151 out:
1152 return intrfc;
1153 }
1154
1155 static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1156 {
1157 int rc = -EINVAL;
1158 struct ifreq ifr;
1159 int val;
1160
1161 switch (cmd) {
1162 case SIOCSIFADDR: {
1163 struct sockaddr_ipx *sipx;
1164 struct ipx_interface_definition f;
1165
1166 rc = -EFAULT;
1167 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1168 break;
1169 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1170 rc = -EINVAL;
1171 if (sipx->sipx_family != AF_IPX)
1172 break;
1173 f.ipx_network = sipx->sipx_network;
1174 memcpy(f.ipx_device, ifr.ifr_name,
1175 sizeof(f.ipx_device));
1176 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1177 f.ipx_dlink_type = sipx->sipx_type;
1178 f.ipx_special = sipx->sipx_special;
1179
1180 if (sipx->sipx_action == IPX_DLTITF)
1181 rc = ipxitf_delete(&f);
1182 else
1183 rc = ipxitf_create(&f);
1184 break;
1185 }
1186 case SIOCGIFADDR: {
1187 struct sockaddr_ipx *sipx;
1188 struct ipx_interface *ipxif;
1189 struct net_device *dev;
1190
1191 rc = -EFAULT;
1192 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1193 break;
1194 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1195 dev = __dev_get_by_name(&init_net, ifr.ifr_name);
1196 rc = -ENODEV;
1197 if (!dev)
1198 break;
1199 ipxif = ipxitf_find_using_phys(dev,
1200 ipx_map_frame_type(sipx->sipx_type));
1201 rc = -EADDRNOTAVAIL;
1202 if (!ipxif)
1203 break;
1204
1205 sipx->sipx_family = AF_IPX;
1206 sipx->sipx_network = ipxif->if_netnum;
1207 memcpy(sipx->sipx_node, ipxif->if_node,
1208 sizeof(sipx->sipx_node));
1209 rc = -EFAULT;
1210 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1211 break;
1212 ipxitf_put(ipxif);
1213 rc = 0;
1214 break;
1215 }
1216 case SIOCAIPXITFCRT:
1217 rc = -EFAULT;
1218 if (get_user(val, (unsigned char __user *) arg))
1219 break;
1220 rc = 0;
1221 ipxcfg_auto_create_interfaces = val;
1222 break;
1223 case SIOCAIPXPRISLT:
1224 rc = -EFAULT;
1225 if (get_user(val, (unsigned char __user *) arg))
1226 break;
1227 rc = 0;
1228 ipxcfg_set_auto_select(val);
1229 break;
1230 }
1231
1232 return rc;
1233 }
1234
1235 /*
1236 * Checksum routine for IPX
1237 */
1238
1239 /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1240 /* This functions should *not* mess with packet contents */
1241
1242 __be16 ipx_cksum(struct ipxhdr *packet, int length)
1243 {
1244 /*
1245 * NOTE: sum is a net byte order quantity, which optimizes the
1246 * loop. This only works on big and little endian machines. (I
1247 * don't know of a machine that isn't.)
1248 */
1249 /* handle the first 3 words separately; checksum should be skipped
1250 * and ipx_tctrl masked out */
1251 __u16 *p = (__u16 *)packet;
1252 __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff));
1253 __u32 i = (length >> 1) - 3; /* Number of remaining complete words */
1254
1255 /* Loop through them */
1256 p += 3;
1257 while (i--)
1258 sum += *p++;
1259
1260 /* Add on the last part word if it exists */
1261 if (packet->ipx_pktsize & htons(1))
1262 sum += (__force u16)htons(0xff00) & *p;
1263
1264 /* Do final fixup */
1265 sum = (sum & 0xffff) + (sum >> 16);
1266
1267 /* It's a pity there's no concept of carry in C */
1268 if (sum >= 0x10000)
1269 sum++;
1270
1271 /*
1272 * Leave 0 alone; we don't want 0xffff here. Note that we can't get
1273 * here with 0x10000, so this check is the same as ((__u16)sum)
1274 */
1275 if (sum)
1276 sum = ~sum;
1277
1278 return (__force __be16)sum;
1279 }
1280
1281 const char *ipx_frame_name(__be16 frame)
1282 {
1283 char* rc = "None";
1284
1285 switch (ntohs(frame)) {
1286 case ETH_P_IPX: rc = "EtherII"; break;
1287 case ETH_P_802_2: rc = "802.2"; break;
1288 case ETH_P_SNAP: rc = "SNAP"; break;
1289 case ETH_P_802_3: rc = "802.3"; break;
1290 case ETH_P_TR_802_2: rc = "802.2TR"; break;
1291 }
1292
1293 return rc;
1294 }
1295
1296 const char *ipx_device_name(struct ipx_interface *intrfc)
1297 {
1298 return intrfc->if_internal ? "Internal" :
1299 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1300 }
1301
1302 /* Handling for system calls applied via the various interfaces to an IPX
1303 * socket object. */
1304
1305 static int ipx_setsockopt(struct socket *sock, int level, int optname,
1306 char __user *optval, int optlen)
1307 {
1308 struct sock *sk = sock->sk;
1309 int opt;
1310 int rc = -EINVAL;
1311
1312 if (optlen != sizeof(int))
1313 goto out;
1314
1315 rc = -EFAULT;
1316 if (get_user(opt, (unsigned int __user *)optval))
1317 goto out;
1318
1319 rc = -ENOPROTOOPT;
1320 if (!(level == SOL_IPX && optname == IPX_TYPE))
1321 goto out;
1322
1323 ipx_sk(sk)->type = opt;
1324 rc = 0;
1325 out:
1326 return rc;
1327 }
1328
1329 static int ipx_getsockopt(struct socket *sock, int level, int optname,
1330 char __user *optval, int __user *optlen)
1331 {
1332 struct sock *sk = sock->sk;
1333 int val = 0;
1334 int len;
1335 int rc = -ENOPROTOOPT;
1336
1337 if (!(level == SOL_IPX && optname == IPX_TYPE))
1338 goto out;
1339
1340 val = ipx_sk(sk)->type;
1341
1342 rc = -EFAULT;
1343 if (get_user(len, optlen))
1344 goto out;
1345
1346 len = min_t(unsigned int, len, sizeof(int));
1347 rc = -EINVAL;
1348 if(len < 0)
1349 goto out;
1350
1351 rc = -EFAULT;
1352 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1353 goto out;
1354
1355 rc = 0;
1356 out:
1357 return rc;
1358 }
1359
1360 static struct proto ipx_proto = {
1361 .name = "IPX",
1362 .owner = THIS_MODULE,
1363 .obj_size = sizeof(struct ipx_sock),
1364 };
1365
1366 static int ipx_create(struct net *net, struct socket *sock, int protocol)
1367 {
1368 int rc = -ESOCKTNOSUPPORT;
1369 struct sock *sk;
1370
1371 if (net != &init_net)
1372 return -EAFNOSUPPORT;
1373
1374 /*
1375 * SPX support is not anymore in the kernel sources. If you want to
1376 * ressurrect it, completing it and making it understand shared skbs,
1377 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1378 * tree.
1379 */
1380 if (sock->type != SOCK_DGRAM)
1381 goto out;
1382
1383 rc = -ENOMEM;
1384 sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto, 1);
1385 if (!sk)
1386 goto out;
1387 #ifdef IPX_REFCNT_DEBUG
1388 atomic_inc(&ipx_sock_nr);
1389 printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk,
1390 atomic_read(&ipx_sock_nr));
1391 #endif
1392 sock_init_data(sock, sk);
1393 sk->sk_no_check = 1; /* Checksum off by default */
1394 sock->ops = &ipx_dgram_ops;
1395 rc = 0;
1396 out:
1397 return rc;
1398 }
1399
1400 static int ipx_release(struct socket *sock)
1401 {
1402 struct sock *sk = sock->sk;
1403
1404 if (!sk)
1405 goto out;
1406
1407 if (!sock_flag(sk, SOCK_DEAD))
1408 sk->sk_state_change(sk);
1409
1410 sock_set_flag(sk, SOCK_DEAD);
1411 sock->sk = NULL;
1412 ipx_destroy_socket(sk);
1413 out:
1414 return 0;
1415 }
1416
1417 /* caller must hold a reference to intrfc */
1418
1419 static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
1420 {
1421 unsigned short socketNum = intrfc->if_sknum;
1422
1423 spin_lock_bh(&intrfc->if_sklist_lock);
1424
1425 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1426 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1427
1428 while (__ipxitf_find_socket(intrfc, htons(socketNum)))
1429 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1430 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1431 else
1432 socketNum++;
1433
1434 spin_unlock_bh(&intrfc->if_sklist_lock);
1435 intrfc->if_sknum = socketNum;
1436
1437 return htons(socketNum);
1438 }
1439
1440 static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1441 {
1442 struct sock *sk = sock->sk;
1443 struct ipx_sock *ipxs = ipx_sk(sk);
1444 struct ipx_interface *intrfc;
1445 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1446 int rc = -EINVAL;
1447
1448 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1449 goto out;
1450
1451 intrfc = ipxitf_find_using_net(addr->sipx_network);
1452 rc = -EADDRNOTAVAIL;
1453 if (!intrfc)
1454 goto out;
1455
1456 if (!addr->sipx_port) {
1457 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1458 rc = -EINVAL;
1459 if (!addr->sipx_port)
1460 goto out_put;
1461 }
1462
1463 /* protect IPX system stuff like routing/sap */
1464 rc = -EACCES;
1465 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1466 !capable(CAP_NET_ADMIN))
1467 goto out_put;
1468
1469 ipxs->port = addr->sipx_port;
1470
1471 #ifdef CONFIG_IPX_INTERN
1472 if (intrfc == ipx_internal_net) {
1473 /* The source address is to be set explicitly if the
1474 * socket is to be bound on the internal network. If a
1475 * node number 0 was specified, the default is used.
1476 */
1477
1478 rc = -EINVAL;
1479 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1480 goto out_put;
1481 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1482 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1483 else
1484 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1485
1486 rc = -EADDRINUSE;
1487 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1488 ipxs->port)) {
1489 SOCK_DEBUG(sk,
1490 "IPX: bind failed because port %X in use.\n",
1491 ntohs(addr->sipx_port));
1492 goto out_put;
1493 }
1494 } else {
1495 /* Source addresses are easy. It must be our
1496 * network:node pair for an interface routed to IPX
1497 * with the ipx routing ioctl()
1498 */
1499
1500 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1501
1502 rc = -EADDRINUSE;
1503 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1504 SOCK_DEBUG(sk,
1505 "IPX: bind failed because port %X in use.\n",
1506 ntohs(addr->sipx_port));
1507 goto out_put;
1508 }
1509 }
1510
1511 #else /* !def CONFIG_IPX_INTERN */
1512
1513 /* Source addresses are easy. It must be our network:node pair for
1514 an interface routed to IPX with the ipx routing ioctl() */
1515
1516 rc = -EADDRINUSE;
1517 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1518 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1519 ntohs((int)addr->sipx_port));
1520 goto out_put;
1521 }
1522
1523 #endif /* CONFIG_IPX_INTERN */
1524
1525 ipxitf_insert_socket(intrfc, sk);
1526 sock_reset_flag(sk, SOCK_ZAPPED);
1527
1528 rc = 0;
1529 out_put:
1530 ipxitf_put(intrfc);
1531 out:
1532 return rc;
1533 }
1534
1535 static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1536 int addr_len, int flags)
1537 {
1538 struct sock *sk = sock->sk;
1539 struct ipx_sock *ipxs = ipx_sk(sk);
1540 struct sockaddr_ipx *addr;
1541 int rc = -EINVAL;
1542 struct ipx_route *rt;
1543
1544 sk->sk_state = TCP_CLOSE;
1545 sock->state = SS_UNCONNECTED;
1546
1547 if (addr_len != sizeof(*addr))
1548 goto out;
1549 addr = (struct sockaddr_ipx *)uaddr;
1550
1551 /* put the autobinding in */
1552 if (!ipxs->port) {
1553 struct sockaddr_ipx uaddr;
1554
1555 uaddr.sipx_port = 0;
1556 uaddr.sipx_network = 0;
1557
1558 #ifdef CONFIG_IPX_INTERN
1559 rc = -ENETDOWN;
1560 if (!ipxs->intrfc)
1561 goto out; /* Someone zonked the iface */
1562 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1563 IPX_NODE_LEN);
1564 #endif /* CONFIG_IPX_INTERN */
1565
1566 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1567 sizeof(struct sockaddr_ipx));
1568 if (rc)
1569 goto out;
1570 }
1571
1572 /* We can either connect to primary network or somewhere
1573 * we can route to */
1574 rt = ipxrtr_lookup(addr->sipx_network);
1575 rc = -ENETUNREACH;
1576 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1577 goto out;
1578
1579 ipxs->dest_addr.net = addr->sipx_network;
1580 ipxs->dest_addr.sock = addr->sipx_port;
1581 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1582 ipxs->type = addr->sipx_type;
1583
1584 if (sock->type == SOCK_DGRAM) {
1585 sock->state = SS_CONNECTED;
1586 sk->sk_state = TCP_ESTABLISHED;
1587 }
1588
1589 if (rt)
1590 ipxrtr_put(rt);
1591 rc = 0;
1592 out:
1593 return rc;
1594 }
1595
1596
1597 static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1598 int *uaddr_len, int peer)
1599 {
1600 struct ipx_address *addr;
1601 struct sockaddr_ipx sipx;
1602 struct sock *sk = sock->sk;
1603 struct ipx_sock *ipxs = ipx_sk(sk);
1604 int rc;
1605
1606 *uaddr_len = sizeof(struct sockaddr_ipx);
1607
1608 if (peer) {
1609 rc = -ENOTCONN;
1610 if (sk->sk_state != TCP_ESTABLISHED)
1611 goto out;
1612
1613 addr = &ipxs->dest_addr;
1614 sipx.sipx_network = addr->net;
1615 sipx.sipx_port = addr->sock;
1616 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1617 } else {
1618 if (ipxs->intrfc) {
1619 sipx.sipx_network = ipxs->intrfc->if_netnum;
1620 #ifdef CONFIG_IPX_INTERN
1621 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1622 #else
1623 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1624 IPX_NODE_LEN);
1625 #endif /* CONFIG_IPX_INTERN */
1626
1627 } else {
1628 sipx.sipx_network = 0;
1629 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1630 }
1631
1632 sipx.sipx_port = ipxs->port;
1633 }
1634
1635 sipx.sipx_family = AF_IPX;
1636 sipx.sipx_type = ipxs->type;
1637 sipx.sipx_zero = 0;
1638 memcpy(uaddr, &sipx, sizeof(sipx));
1639
1640 rc = 0;
1641 out:
1642 return rc;
1643 }
1644
1645 static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1646 {
1647 /* NULL here for pt means the packet was looped back */
1648 struct ipx_interface *intrfc;
1649 struct ipxhdr *ipx;
1650 u16 ipx_pktsize;
1651 int rc = 0;
1652
1653 if (dev->nd_net != &init_net)
1654 goto drop;
1655
1656 /* Not ours */
1657 if (skb->pkt_type == PACKET_OTHERHOST)
1658 goto drop;
1659
1660 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1661 goto out;
1662
1663 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1664 goto drop;
1665
1666 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
1667
1668 /* Too small or invalid header? */
1669 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1670 !pskb_may_pull(skb, ipx_pktsize))
1671 goto drop;
1672
1673 ipx = ipx_hdr(skb);
1674 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1675 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1676 goto drop;
1677
1678 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1679 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1680 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1681
1682 /* Determine what local ipx endpoint this is */
1683 intrfc = ipxitf_find_using_phys(dev, pt->type);
1684 if (!intrfc) {
1685 if (ipxcfg_auto_create_interfaces &&
1686 IPX_SKB_CB(skb)->ipx_dest_net) {
1687 intrfc = ipxitf_auto_create(dev, pt->type);
1688 if (intrfc)
1689 ipxitf_hold(intrfc);
1690 }
1691
1692 if (!intrfc) /* Not one of ours */
1693 /* or invalid packet for auto creation */
1694 goto drop;
1695 }
1696
1697 rc = ipxitf_rcv(intrfc, skb);
1698 ipxitf_put(intrfc);
1699 goto out;
1700 drop:
1701 kfree_skb(skb);
1702 out:
1703 return rc;
1704 }
1705
1706 static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1707 struct msghdr *msg, size_t len)
1708 {
1709 struct sock *sk = sock->sk;
1710 struct ipx_sock *ipxs = ipx_sk(sk);
1711 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1712 struct sockaddr_ipx local_sipx;
1713 int rc = -EINVAL;
1714 int flags = msg->msg_flags;
1715
1716 /* Socket gets bound below anyway */
1717 /* if (sk->sk_zapped)
1718 return -EIO; */ /* Socket not bound */
1719 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1720 goto out;
1721
1722 /* Max possible packet size limited by 16 bit pktsize in header */
1723 if (len >= 65535 - sizeof(struct ipxhdr))
1724 goto out;
1725
1726 if (usipx) {
1727 if (!ipxs->port) {
1728 struct sockaddr_ipx uaddr;
1729
1730 uaddr.sipx_port = 0;
1731 uaddr.sipx_network = 0;
1732 #ifdef CONFIG_IPX_INTERN
1733 rc = -ENETDOWN;
1734 if (!ipxs->intrfc)
1735 goto out; /* Someone zonked the iface */
1736 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1737 IPX_NODE_LEN);
1738 #endif
1739 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1740 sizeof(struct sockaddr_ipx));
1741 if (rc)
1742 goto out;
1743 }
1744
1745 rc = -EINVAL;
1746 if (msg->msg_namelen < sizeof(*usipx) ||
1747 usipx->sipx_family != AF_IPX)
1748 goto out;
1749 } else {
1750 rc = -ENOTCONN;
1751 if (sk->sk_state != TCP_ESTABLISHED)
1752 goto out;
1753
1754 usipx = &local_sipx;
1755 usipx->sipx_family = AF_IPX;
1756 usipx->sipx_type = ipxs->type;
1757 usipx->sipx_port = ipxs->dest_addr.sock;
1758 usipx->sipx_network = ipxs->dest_addr.net;
1759 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1760 }
1761
1762 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1763 flags & MSG_DONTWAIT);
1764 if (rc >= 0)
1765 rc = len;
1766 out:
1767 return rc;
1768 }
1769
1770
1771 static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1772 struct msghdr *msg, size_t size, int flags)
1773 {
1774 struct sock *sk = sock->sk;
1775 struct ipx_sock *ipxs = ipx_sk(sk);
1776 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1777 struct ipxhdr *ipx = NULL;
1778 struct sk_buff *skb;
1779 int copied, rc;
1780
1781 /* put the autobinding in */
1782 if (!ipxs->port) {
1783 struct sockaddr_ipx uaddr;
1784
1785 uaddr.sipx_port = 0;
1786 uaddr.sipx_network = 0;
1787
1788 #ifdef CONFIG_IPX_INTERN
1789 rc = -ENETDOWN;
1790 if (!ipxs->intrfc)
1791 goto out; /* Someone zonked the iface */
1792 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1793 #endif /* CONFIG_IPX_INTERN */
1794
1795 rc = ipx_bind(sock, (struct sockaddr *)&uaddr,
1796 sizeof(struct sockaddr_ipx));
1797 if (rc)
1798 goto out;
1799 }
1800
1801 rc = -ENOTCONN;
1802 if (sock_flag(sk, SOCK_ZAPPED))
1803 goto out;
1804
1805 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1806 flags & MSG_DONTWAIT, &rc);
1807 if (!skb)
1808 goto out;
1809
1810 ipx = ipx_hdr(skb);
1811 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1812 if (copied > size) {
1813 copied = size;
1814 msg->msg_flags |= MSG_TRUNC;
1815 }
1816
1817 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1818 copied);
1819 if (rc)
1820 goto out_free;
1821 if (skb->tstamp.tv64)
1822 sk->sk_stamp = skb->tstamp;
1823
1824 msg->msg_namelen = sizeof(*sipx);
1825
1826 if (sipx) {
1827 sipx->sipx_family = AF_IPX;
1828 sipx->sipx_port = ipx->ipx_source.sock;
1829 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1830 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1831 sipx->sipx_type = ipx->ipx_type;
1832 sipx->sipx_zero = 0;
1833 }
1834 rc = copied;
1835
1836 out_free:
1837 skb_free_datagram(sk, skb);
1838 out:
1839 return rc;
1840 }
1841
1842
1843 static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1844 {
1845 int rc = 0;
1846 long amount = 0;
1847 struct sock *sk = sock->sk;
1848 void __user *argp = (void __user *)arg;
1849
1850 switch (cmd) {
1851 case TIOCOUTQ:
1852 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1853 if (amount < 0)
1854 amount = 0;
1855 rc = put_user(amount, (int __user *)argp);
1856 break;
1857 case TIOCINQ: {
1858 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1859 /* These two are safe on a single CPU system as only
1860 * user tasks fiddle here */
1861 if (skb)
1862 amount = skb->len - sizeof(struct ipxhdr);
1863 rc = put_user(amount, (int __user *)argp);
1864 break;
1865 }
1866 case SIOCADDRT:
1867 case SIOCDELRT:
1868 rc = -EPERM;
1869 if (capable(CAP_NET_ADMIN))
1870 rc = ipxrtr_ioctl(cmd, argp);
1871 break;
1872 case SIOCSIFADDR:
1873 case SIOCAIPXITFCRT:
1874 case SIOCAIPXPRISLT:
1875 rc = -EPERM;
1876 if (!capable(CAP_NET_ADMIN))
1877 break;
1878 case SIOCGIFADDR:
1879 rc = ipxitf_ioctl(cmd, argp);
1880 break;
1881 case SIOCIPXCFGDATA:
1882 rc = ipxcfg_get_config_data(argp);
1883 break;
1884 case SIOCIPXNCPCONN:
1885 /*
1886 * This socket wants to take care of the NCP connection
1887 * handed to us in arg.
1888 */
1889 rc = -EPERM;
1890 if (!capable(CAP_NET_ADMIN))
1891 break;
1892 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1893 (const unsigned short __user *)argp);
1894 break;
1895 case SIOCGSTAMP:
1896 rc = -EINVAL;
1897 if (sk)
1898 rc = sock_get_timestamp(sk, argp);
1899 break;
1900 case SIOCGIFDSTADDR:
1901 case SIOCSIFDSTADDR:
1902 case SIOCGIFBRDADDR:
1903 case SIOCSIFBRDADDR:
1904 case SIOCGIFNETMASK:
1905 case SIOCSIFNETMASK:
1906 rc = -EINVAL;
1907 break;
1908 default:
1909 rc = -ENOIOCTLCMD;
1910 break;
1911 }
1912
1913 return rc;
1914 }
1915
1916
1917 #ifdef CONFIG_COMPAT
1918 static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1919 {
1920 /*
1921 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1922 * commands is handled by generic ioctl code. As these commands are
1923 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1924 * code.
1925 */
1926 switch (cmd) {
1927 case SIOCAIPXITFCRT:
1928 case SIOCAIPXPRISLT:
1929 case SIOCIPXCFGDATA:
1930 case SIOCIPXNCPCONN:
1931 return ipx_ioctl(sock, cmd, arg);
1932 default:
1933 return -ENOIOCTLCMD;
1934 }
1935 }
1936 #endif
1937
1938
1939 /*
1940 * Socket family declarations
1941 */
1942
1943 static struct net_proto_family ipx_family_ops = {
1944 .family = PF_IPX,
1945 .create = ipx_create,
1946 .owner = THIS_MODULE,
1947 };
1948
1949 static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = {
1950 .family = PF_IPX,
1951 .owner = THIS_MODULE,
1952 .release = ipx_release,
1953 .bind = ipx_bind,
1954 .connect = ipx_connect,
1955 .socketpair = sock_no_socketpair,
1956 .accept = sock_no_accept,
1957 .getname = ipx_getname,
1958 .poll = datagram_poll,
1959 .ioctl = ipx_ioctl,
1960 #ifdef CONFIG_COMPAT
1961 .compat_ioctl = ipx_compat_ioctl,
1962 #endif
1963 .listen = sock_no_listen,
1964 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1965 .setsockopt = ipx_setsockopt,
1966 .getsockopt = ipx_getsockopt,
1967 .sendmsg = ipx_sendmsg,
1968 .recvmsg = ipx_recvmsg,
1969 .mmap = sock_no_mmap,
1970 .sendpage = sock_no_sendpage,
1971 };
1972
1973 SOCKOPS_WRAP(ipx_dgram, PF_IPX);
1974
1975 static struct packet_type ipx_8023_packet_type = {
1976 .type = __constant_htons(ETH_P_802_3),
1977 .func = ipx_rcv,
1978 };
1979
1980 static struct packet_type ipx_dix_packet_type = {
1981 .type = __constant_htons(ETH_P_IPX),
1982 .func = ipx_rcv,
1983 };
1984
1985 static struct notifier_block ipx_dev_notifier = {
1986 .notifier_call = ipxitf_device_event,
1987 };
1988
1989 extern struct datalink_proto *make_EII_client(void);
1990 extern void destroy_EII_client(struct datalink_proto *);
1991
1992 static unsigned char ipx_8022_type = 0xE0;
1993 static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1994 static char ipx_EII_err_msg[] __initdata =
1995 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
1996 static char ipx_8023_err_msg[] __initdata =
1997 KERN_CRIT "IPX: Unable to register with 802.3\n";
1998 static char ipx_llc_err_msg[] __initdata =
1999 KERN_CRIT "IPX: Unable to register with 802.2\n";
2000 static char ipx_snap_err_msg[] __initdata =
2001 KERN_CRIT "IPX: Unable to register with SNAP\n";
2002
2003 static int __init ipx_init(void)
2004 {
2005 int rc = proto_register(&ipx_proto, 1);
2006
2007 if (rc != 0)
2008 goto out;
2009
2010 sock_register(&ipx_family_ops);
2011
2012 pEII_datalink = make_EII_client();
2013 if (pEII_datalink)
2014 dev_add_pack(&ipx_dix_packet_type);
2015 else
2016 printk(ipx_EII_err_msg);
2017
2018 p8023_datalink = make_8023_client();
2019 if (p8023_datalink)
2020 dev_add_pack(&ipx_8023_packet_type);
2021 else
2022 printk(ipx_8023_err_msg);
2023
2024 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2025 if (!p8022_datalink)
2026 printk(ipx_llc_err_msg);
2027
2028 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2029 if (!pSNAP_datalink)
2030 printk(ipx_snap_err_msg);
2031
2032 register_netdevice_notifier(&ipx_dev_notifier);
2033 ipx_register_sysctl();
2034 ipx_proc_init();
2035 out:
2036 return rc;
2037 }
2038
2039 static void __exit ipx_proto_finito(void)
2040 {
2041 ipx_proc_exit();
2042 ipx_unregister_sysctl();
2043
2044 unregister_netdevice_notifier(&ipx_dev_notifier);
2045
2046 ipxitf_cleanup();
2047
2048 if (pSNAP_datalink) {
2049 unregister_snap_client(pSNAP_datalink);
2050 pSNAP_datalink = NULL;
2051 }
2052
2053 if (p8022_datalink) {
2054 unregister_8022_client(p8022_datalink);
2055 p8022_datalink = NULL;
2056 }
2057
2058 dev_remove_pack(&ipx_8023_packet_type);
2059 if (p8023_datalink) {
2060 destroy_8023_client(p8023_datalink);
2061 p8023_datalink = NULL;
2062 }
2063
2064 dev_remove_pack(&ipx_dix_packet_type);
2065 if (pEII_datalink) {
2066 destroy_EII_client(pEII_datalink);
2067 pEII_datalink = NULL;
2068 }
2069
2070 proto_unregister(&ipx_proto);
2071 sock_unregister(ipx_family_ops.family);
2072 }
2073
2074 module_init(ipx_init);
2075 module_exit(ipx_proto_finito);
2076 MODULE_LICENSE("GPL");
2077 MODULE_ALIAS_NETPROTO(PF_IPX);
WRT350N Kernel Patches