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