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1/*
2 * Implements an IPX socket layer.
3 *
4 * This code is derived from work by
5 * Ross Biro : Writing the original IP stack
6 * Fred Van Kempen : Tidying up the TCP/IP
7 *
8 * Many thanks go to Keith Baker, Institute For Industrial Information
9 * Technology Ltd, Swansea University for allowing me to work on this
10 * in my own time even though it was in some ways related to commercial
11 * work I am currently employed to do there.
12 *
13 * All the material in this file is subject to the Gnu license version 2.
14 * Neither Alan Cox nor the Swansea University Computer Society admit
15 * liability nor provide warranty for any of this software. This material
16 * is provided as is and at no charge.
17 *
18 * Portions Copyright (c) 2000-2003 Conectiva, Inc. <acme@conectiva.com.br>
19 * Neither Arnaldo Carvalho de Melo nor Conectiva, Inc. admit liability nor
20 * provide warranty for any of this software. This material is provided
21 * "AS-IS" and at no charge.
22 *
23 * Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com>
24 * Neither Greg Page nor Caldera, Inc. admit liability nor provide
25 * warranty for any of this software. This material is provided
26 * "AS-IS" and at no charge.
27 *
28 * See net/ipx/ChangeLog.
29 */
30
31#include <linux/capability.h>
32#include <linux/errno.h>
33#include <linux/if_arp.h>
34#include <linux/if_ether.h>
35#include <linux/init.h>
36#include <linux/ipx.h>
37#include <linux/kernel.h>
38#include <linux/list.h>
39#include <linux/module.h>
40#include <linux/net.h>
41#include <linux/netdevice.h>
42#include <linux/uio.h>
43#include <linux/slab.h>
44#include <linux/skbuff.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
47#include <linux/string.h>
48#include <linux/types.h>
49#include <linux/termios.h>
50
51#include <net/ipx.h>
52#include <net/p8022.h>
53#include <net/psnap.h>
54#include <net/sock.h>
55#include <net/tcp_states.h>
56
57#include <asm/uaccess.h>
58
59#ifdef CONFIG_SYSCTL
60extern void ipx_register_sysctl(void);
61extern void ipx_unregister_sysctl(void);
62#else
63#define ipx_register_sysctl()
64#define ipx_unregister_sysctl()
65#endif
66
67/* Configuration Variables */
68static unsigned char ipxcfg_max_hops = 16;
69static char ipxcfg_auto_select_primary;
70static char ipxcfg_auto_create_interfaces;
71int sysctl_ipx_pprop_broadcasting = 1;
72
73/* Global Variables */
74static struct datalink_proto *p8022_datalink;
75static struct datalink_proto *pEII_datalink;
76static struct datalink_proto *p8023_datalink;
77static struct datalink_proto *pSNAP_datalink;
78
79static const struct proto_ops ipx_dgram_ops;
80
81LIST_HEAD(ipx_interfaces);
82DEFINE_SPINLOCK(ipx_interfaces_lock);
83
84struct ipx_interface *ipx_primary_net;
85struct ipx_interface *ipx_internal_net;
86
87extern int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
88 unsigned char *node);
89extern void ipxrtr_del_routes(struct ipx_interface *intrfc);
90extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx,
91 struct iovec *iov, size_t len, int noblock);
92extern int ipxrtr_route_skb(struct sk_buff *skb);
93extern struct ipx_route *ipxrtr_lookup(__be32 net);
94extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg);
95
96struct ipx_interface *ipx_interfaces_head(void)
97{
98 struct ipx_interface *rc = NULL;
99
100 if (!list_empty(&ipx_interfaces))
101 rc = list_entry(ipx_interfaces.next,
102 struct ipx_interface, node);
103 return rc;
104}
105
106static void ipxcfg_set_auto_select(char val)
107{
108 ipxcfg_auto_select_primary = val;
109 if (val && !ipx_primary_net)
110 ipx_primary_net = ipx_interfaces_head();
111}
112
113static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
114{
115 struct ipx_config_data vals;
116
117 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
118 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
119
120 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
121}
122
123/*
124 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
125 * handler using this technique. They can be added although we do not
126 * use this facility.
127 */
128
129static void ipx_remove_socket(struct sock *sk)
130{
131 /* Determine interface with which socket is associated */
132 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
133
134 if (!intrfc)
135 goto out;
136
137 ipxitf_hold(intrfc);
138 spin_lock_bh(&intrfc->if_sklist_lock);
139 sk_del_node_init(sk);
140 spin_unlock_bh(&intrfc->if_sklist_lock);
141 ipxitf_put(intrfc);
142out:
143 return;
144}
145
146static void ipx_destroy_socket(struct sock *sk)
147{
148 ipx_remove_socket(sk);
149 skb_queue_purge(&sk->sk_receive_queue);
150 sk_refcnt_debug_dec(sk);
151}
152
153/*
154 * The following code is used to support IPX Interfaces (IPXITF). An
155 * IPX interface is defined by a physical device and a frame type.
156 */
157
158/* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
159
160static void ipxitf_clear_primary_net(void)
161{
162 ipx_primary_net = NULL;
163 if (ipxcfg_auto_select_primary)
164 ipx_primary_net = ipx_interfaces_head();
165}
166
167static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
168 __be16 datalink)
169{
170 struct ipx_interface *i;
171
172 list_for_each_entry(i, &ipx_interfaces, node)
173 if (i->if_dev == dev && i->if_dlink_type == datalink)
174 goto out;
175 i = NULL;
176out:
177 return i;
178}
179
180static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
181 __be16 datalink)
182{
183 struct ipx_interface *i;
184
185 spin_lock_bh(&ipx_interfaces_lock);
186 i = __ipxitf_find_using_phys(dev, datalink);
187 if (i)
188 ipxitf_hold(i);
189 spin_unlock_bh(&ipx_interfaces_lock);
190 return i;
191}
192
193struct ipx_interface *ipxitf_find_using_net(__be32 net)
194{
195 struct ipx_interface *i;
196
197 spin_lock_bh(&ipx_interfaces_lock);
198 if (net) {
199 list_for_each_entry(i, &ipx_interfaces, node)
200 if (i->if_netnum == net)
201 goto hold;
202 i = NULL;
203 goto unlock;
204 }
205
206 i = ipx_primary_net;
207 if (i)
208hold:
209 ipxitf_hold(i);
210unlock:
211 spin_unlock_bh(&ipx_interfaces_lock);
212 return i;
213}
214
215/* Sockets are bound to a particular IPX interface. */
216static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
217{
218 ipxitf_hold(intrfc);
219 spin_lock_bh(&intrfc->if_sklist_lock);
220 ipx_sk(sk)->intrfc = intrfc;
221 sk_add_node(sk, &intrfc->if_sklist);
222 spin_unlock_bh(&intrfc->if_sklist_lock);
223 ipxitf_put(intrfc);
224}
225
226/* caller must hold intrfc->if_sklist_lock */
227static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
228 __be16 port)
229{
230 struct sock *s;
231 struct hlist_node *node;
232
233 sk_for_each(s, node, &intrfc->if_sklist)
234 if (ipx_sk(s)->port == port)
235 goto found;
236 s = NULL;
237found:
238 return s;
239}
240
241/* caller must hold a reference to intrfc */
242static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
243 __be16 port)
244{
245 struct sock *s;
246
247 spin_lock_bh(&intrfc->if_sklist_lock);
248 s = __ipxitf_find_socket(intrfc, port);
249 if (s)
250 sock_hold(s);
251 spin_unlock_bh(&intrfc->if_sklist_lock);
252
253 return s;
254}
255
256#ifdef CONFIG_IPX_INTERN
257static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
258 unsigned char *ipx_node,
259 __be16 port)
260{
261 struct sock *s;
262 struct hlist_node *node;
263
264 ipxitf_hold(intrfc);
265 spin_lock_bh(&intrfc->if_sklist_lock);
266
267 sk_for_each(s, node, &intrfc->if_sklist) {
268 struct ipx_sock *ipxs = ipx_sk(s);
269
270 if (ipxs->port == port &&
271 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
272 goto found;
273 }
274 s = NULL;
275found:
276 spin_unlock_bh(&intrfc->if_sklist_lock);
277 ipxitf_put(intrfc);
278 return s;
279}
280#endif
281
282static void __ipxitf_down(struct ipx_interface *intrfc)
283{
284 struct sock *s;
285 struct hlist_node *node, *t;
286
287 /* Delete all routes associated with this interface */
288 ipxrtr_del_routes(intrfc);
289
290 spin_lock_bh(&intrfc->if_sklist_lock);
291 /* error sockets */
292 sk_for_each_safe(s, node, t, &intrfc->if_sklist) {
293 struct ipx_sock *ipxs = ipx_sk(s);
294
295 s->sk_err = ENOLINK;
296 s->sk_error_report(s);
297 ipxs->intrfc = NULL;
298 ipxs->port = 0;
299 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
300 sk_del_node_init(s);
301 }
302 INIT_HLIST_HEAD(&intrfc->if_sklist);
303 spin_unlock_bh(&intrfc->if_sklist_lock);
304
305 /* remove this interface from list */
306 list_del(&intrfc->node);
307
308 /* remove this interface from *special* networks */
309 if (intrfc == ipx_primary_net)
310 ipxitf_clear_primary_net();
311 if (intrfc == ipx_internal_net)
312 ipx_internal_net = NULL;
313
314 if (intrfc->if_dev)
315 dev_put(intrfc->if_dev);
316 kfree(intrfc);
317}
318
319void ipxitf_down(struct ipx_interface *intrfc)
320{
321 spin_lock_bh(&ipx_interfaces_lock);
322 __ipxitf_down(intrfc);
323 spin_unlock_bh(&ipx_interfaces_lock);
324}
325
326static __inline__ void __ipxitf_put(struct ipx_interface *intrfc)
327{
328 if (atomic_dec_and_test(&intrfc->refcnt))
329 __ipxitf_down(intrfc);
330}
331
332static int ipxitf_device_event(struct notifier_block *notifier,
333 unsigned long event, void *ptr)
334{
335 struct net_device *dev = ptr;
336 struct ipx_interface *i, *tmp;
337
338 if (!net_eq(dev_net(dev), &init_net))
339 return NOTIFY_DONE;
340
341 if (event != NETDEV_DOWN && event != NETDEV_UP)
342 goto out;
343
344 spin_lock_bh(&ipx_interfaces_lock);
345 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
346 if (i->if_dev == dev) {
347 if (event == NETDEV_UP)
348 ipxitf_hold(i);
349 else
350 __ipxitf_put(i);
351 }
352 spin_unlock_bh(&ipx_interfaces_lock);
353out:
354 return NOTIFY_DONE;
355}
356
357
358static __exit void ipxitf_cleanup(void)
359{
360 struct ipx_interface *i, *tmp;
361
362 spin_lock_bh(&ipx_interfaces_lock);
363 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
364 __ipxitf_put(i);
365 spin_unlock_bh(&ipx_interfaces_lock);
366}
367
368static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
369{
370 if (sock_queue_rcv_skb(sock, skb) < 0)
371 kfree_skb(skb);
372}
373
374/*
375 * On input skb->sk is NULL. Nobody is charged for the memory.
376 */
377
378/* caller must hold a reference to intrfc */
379
380#ifdef CONFIG_IPX_INTERN
381static int ipxitf_demux_socket(struct ipx_interface *intrfc,
382 struct sk_buff *skb, int copy)
383{
384 struct ipxhdr *ipx = ipx_hdr(skb);
385 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
386 IPX_NODE_LEN);
387 struct sock *s;
388 struct hlist_node *node;
389 int rc;
390
391 spin_lock_bh(&intrfc->if_sklist_lock);
392
393 sk_for_each(s, node, &intrfc->if_sklist) {
394 struct ipx_sock *ipxs = ipx_sk(s);
395
396 if (ipxs->port == ipx->ipx_dest.sock &&
397 (is_broadcast || !memcmp(ipx->ipx_dest.node,
398 ipxs->node, IPX_NODE_LEN))) {
399 /* We found a socket to which to send */
400 struct sk_buff *skb1;
401
402 if (copy) {
403 skb1 = skb_clone(skb, GFP_ATOMIC);
404 rc = -ENOMEM;
405 if (!skb1)
406 goto out;
407 } else {
408 skb1 = skb;
409 copy = 1; /* skb may only be used once */
410 }
411 ipxitf_def_skb_handler(s, skb1);
412
413 /* On an external interface, one socket can listen */
414 if (intrfc != ipx_internal_net)
415 break;
416 }
417 }
418
419 /* skb was solely for us, and we did not make a copy, so free it. */
420 if (!copy)
421 kfree_skb(skb);
422
423 rc = 0;
424out:
425 spin_unlock_bh(&intrfc->if_sklist_lock);
426 return rc;
427}
428#else
429static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
430 struct ipxhdr *ipx)
431{
432 /* The packet's target is a NCP connection handler. We want to hand it
433 * to the correct socket directly within the kernel, so that the
434 * mars_nwe packet distribution process does not have to do it. Here we
435 * only care about NCP and BURST packets.
436 *
437 * You might call this a hack, but believe me, you do not want a
438 * complete NCP layer in the kernel, and this is VERY fast as well. */
439 struct sock *sk = NULL;
440 int connection = 0;
441 u8 *ncphdr = (u8 *)(ipx + 1);
442
443 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
444 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
445 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
446 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
447
448 if (connection) {
449 struct hlist_node *node;
450 /* Now we have to look for a special NCP connection handling
451 * socket. Only these sockets have ipx_ncp_conn != 0, set by
452 * SIOCIPXNCPCONN. */
453 spin_lock_bh(&intrfc->if_sklist_lock);
454 sk_for_each(sk, node, &intrfc->if_sklist)
455 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
456 sock_hold(sk);
457 goto found;
458 }
459 sk = NULL;
460 found:
461 spin_unlock_bh(&intrfc->if_sklist_lock);
462 }
463 return sk;
464}
465
466static int ipxitf_demux_socket(struct ipx_interface *intrfc,
467 struct sk_buff *skb, int copy)
468{
469 struct ipxhdr *ipx = ipx_hdr(skb);
470 struct sock *sock1 = NULL, *sock2 = NULL;
471 struct sk_buff *skb1 = NULL, *skb2 = NULL;
472 int rc;
473
474 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
475 sock1 = ncp_connection_hack(intrfc, ipx);
476 if (!sock1)
477 /* No special socket found, forward the packet the normal way */
478 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
479
480 /*
481 * We need to check if there is a primary net and if
482 * this is addressed to one of the *SPECIAL* sockets because
483 * these need to be propagated to the primary net.
484 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
485 * 0x456(Diagnostic).
486 */
487
488 if (ipx_primary_net && intrfc != ipx_primary_net) {
489 const int dsock = ntohs(ipx->ipx_dest.sock);
490
491 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
492 /* The appropriate thing to do here is to dup the
493 * packet and route to the primary net interface via
494 * ipxitf_send; however, we'll cheat and just demux it
495 * here. */
496 sock2 = ipxitf_find_socket(ipx_primary_net,
497 ipx->ipx_dest.sock);
498 }
499
500 /*
501 * If there is nothing to do return. The kfree will cancel any charging.
502 */
503 rc = 0;
504 if (!sock1 && !sock2) {
505 if (!copy)
506 kfree_skb(skb);
507 goto out;
508 }
509
510 /*
511 * This next segment of code is a little awkward, but it sets it up
512 * so that the appropriate number of copies of the SKB are made and
513 * that skb1 and skb2 point to it (them) so that it (they) can be
514 * demuxed to sock1 and/or sock2. If we are unable to make enough
515 * copies, we do as much as is possible.
516 */
517
518 if (copy)
519 skb1 = skb_clone(skb, GFP_ATOMIC);
520 else
521 skb1 = skb;
522
523 rc = -ENOMEM;
524 if (!skb1)
525 goto out_put;
526
527 /* Do we need 2 SKBs? */
528 if (sock1 && sock2)
529 skb2 = skb_clone(skb1, GFP_ATOMIC);
530 else
531 skb2 = skb1;
532
533 if (sock1)
534 ipxitf_def_skb_handler(sock1, skb1);
535
536 if (!skb2)
537 goto out_put;
538
539 if (sock2)
540 ipxitf_def_skb_handler(sock2, skb2);
541
542 rc = 0;
543out_put:
544 if (sock1)
545 sock_put(sock1);
546 if (sock2)
547 sock_put(sock2);
548out:
549 return rc;
550}
551#endif /* CONFIG_IPX_INTERN */
552
553static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
554 struct sk_buff *skb)
555{
556 struct sk_buff *skb2;
557 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
558 int out_offset = intrfc->if_ipx_offset;
559 int len;
560
561 /* Hopefully, most cases */
562 if (in_offset >= out_offset)
563 return skb;
564
565 /* Need new SKB */
566 len = skb->len + out_offset;
567 skb2 = alloc_skb(len, GFP_ATOMIC);
568 if (skb2) {
569 skb_reserve(skb2, out_offset);
570 skb_reset_network_header(skb2);
571 skb_reset_transport_header(skb2);
572 skb_put(skb2, skb->len);
573 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
574 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
575 }
576 kfree_skb(skb);
577 return skb2;
578}
579
580/* caller must hold a reference to intrfc and the skb has to be unshared */
581int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
582{
583 struct ipxhdr *ipx = ipx_hdr(skb);
584 struct net_device *dev = intrfc->if_dev;
585 struct datalink_proto *dl = intrfc->if_dlink;
586 char dest_node[IPX_NODE_LEN];
587 int send_to_wire = 1;
588 int addr_len;
589
590 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
591 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
592 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
593
594 /* see if we need to include the netnum in the route list */
595 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
596 __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
597 sizeof(struct ipxhdr) +
598 IPX_SKB_CB(skb)->last_hop.index *
599 sizeof(__be32));
600 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
601 IPX_SKB_CB(skb)->last_hop.index = -1;
602 }
603
604 /*
605 * We need to know how many skbuffs it will take to send out this
606 * packet to avoid unnecessary copies.
607 */
608
609 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
610 send_to_wire = 0; /* No non looped */
611
612 /*
613 * See if this should be demuxed to sockets on this interface
614 *
615 * We want to ensure the original was eaten or that we only use
616 * up clones.
617 */
618
619 if (ipx->ipx_dest.net == intrfc->if_netnum) {
620 /*
621 * To our own node, loop and free the original.
622 * The internal net will receive on all node address.
623 */
624 if (intrfc == ipx_internal_net ||
625 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
626 /* Don't charge sender */
627 skb_orphan(skb);
628
629 /* Will charge receiver */
630 return ipxitf_demux_socket(intrfc, skb, 0);
631 }
632
633 /* Broadcast, loop and possibly keep to send on. */
634 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
635 if (!send_to_wire)
636 skb_orphan(skb);
637 ipxitf_demux_socket(intrfc, skb, send_to_wire);
638 if (!send_to_wire)
639 goto out;
640 }
641 }
642
643 /*
644 * If the originating net is not equal to our net; this is routed
645 * We are still charging the sender. Which is right - the driver
646 * free will handle this fairly.
647 */
648 if (ipx->ipx_source.net != intrfc->if_netnum) {
649 /*
650 * Unshare the buffer before modifying the count in
651 * case it's a flood or tcpdump
652 */
653 skb = skb_unshare(skb, GFP_ATOMIC);
654 if (!skb)
655 goto out;
656 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
657 send_to_wire = 0;
658 }
659
660 if (!send_to_wire) {
661 kfree_skb(skb);
662 goto out;
663 }
664
665 /* Determine the appropriate hardware address */
666 addr_len = dev->addr_len;
667 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
668 memcpy(dest_node, dev->broadcast, addr_len);
669 else
670 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
671
672 /* Make any compensation for differing physical/data link size */
673 skb = ipxitf_adjust_skbuff(intrfc, skb);
674 if (!skb)
675 goto out;
676
677 /* set up data link and physical headers */
678 skb->dev = dev;
679 skb->protocol = htons(ETH_P_IPX);
680
681 /* Send it out */
682 dl->request(dl, skb, dest_node);
683out:
684 return 0;
685}
686
687static int ipxitf_add_local_route(struct ipx_interface *intrfc)
688{
689 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
690}
691
692static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
693 struct sk_buff *skb);
694static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
695
696static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
697{
698 struct ipxhdr *ipx = ipx_hdr(skb);
699 int rc = 0;
700
701 ipxitf_hold(intrfc);
702
703 /* See if we should update our network number */
704 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
705 ipxitf_discover_netnum(intrfc, skb);
706
707 IPX_SKB_CB(skb)->last_hop.index = -1;
708 if (ipx->ipx_type == IPX_TYPE_PPROP) {
709 rc = ipxitf_pprop(intrfc, skb);
710 if (rc)
711 goto out_free_skb;
712 }
713
714 /* local processing follows */
715 if (!IPX_SKB_CB(skb)->ipx_dest_net)
716 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
717 if (!IPX_SKB_CB(skb)->ipx_source_net)
718 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
719
720 /* it doesn't make sense to route a pprop packet, there's no meaning
721 * in the ipx_dest_net for such packets */
722 if (ipx->ipx_type != IPX_TYPE_PPROP &&
723 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
724 /* We only route point-to-point packets. */
725 if (skb->pkt_type == PACKET_HOST) {
726 skb = skb_unshare(skb, GFP_ATOMIC);
727 if (skb)
728 rc = ipxrtr_route_skb(skb);
729 goto out_intrfc;
730 }
731
732 goto out_free_skb;
733 }
734
735 /* see if we should keep it */
736 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
737 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
738 rc = ipxitf_demux_socket(intrfc, skb, 0);
739 goto out_intrfc;
740 }
741
742 /* we couldn't pawn it off so unload it */
743out_free_skb:
744 kfree_skb(skb);
745out_intrfc:
746 ipxitf_put(intrfc);
747 return rc;
748}
749
750static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
751 struct sk_buff *skb)
752{
753 const struct ipx_cb *cb = IPX_SKB_CB(skb);
754
755 /* see if this is an intra packet: source_net == dest_net */
756 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
757 struct ipx_interface *i =
758 ipxitf_find_using_net(cb->ipx_source_net);
759 /* NB: NetWare servers lie about their hop count so we
760 * dropped the test based on it. This is the best way
761 * to determine this is a 0 hop count packet. */
762 if (!i) {
763 intrfc->if_netnum = cb->ipx_source_net;
764 ipxitf_add_local_route(intrfc);
765 } else {
766 printk(KERN_WARNING "IPX: Network number collision "
767 "%lx\n %s %s and %s %s\n",
768 (unsigned long) ntohl(cb->ipx_source_net),
769 ipx_device_name(i),
770 ipx_frame_name(i->if_dlink_type),
771 ipx_device_name(intrfc),
772 ipx_frame_name(intrfc->if_dlink_type));
773 ipxitf_put(i);
774 }
775 }
776}
777
778/**
779 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
780 * NetBIOS broadcasts
781 * @intrfc: IPX interface receiving this packet
782 * @skb: Received packet
783 *
784 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
785 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
786 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
787 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
788 * RIP and SAP Router Specification", Part Number 107-000029-001.
789 *
790 * If it is valid, check if we have pprop broadcasting enabled by the user,
791 * if not, just return zero for local processing.
792 *
793 * If it is enabled check the packet and don't broadcast it if we have already
794 * seen this packet.
795 *
796 * Broadcast: send it to the interfaces that aren't on the packet visited nets
797 * array, just after the IPX header.
798 *
799 * Returns -EINVAL for invalid packets, so that the calling function drops
800 * the packet without local processing. 0 if packet is to be locally processed.
801 */
802static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
803{
804 struct ipxhdr *ipx = ipx_hdr(skb);
805 int i, rc = -EINVAL;
806 struct ipx_interface *ifcs;
807 char *c;
808 __be32 *l;
809
810 /* Illegal packet - too many hops or too short */
811 /* We decide to throw it away: no broadcasting, no local processing.
812 * NetBIOS unaware implementations route them as normal packets -
813 * tctrl <= 15, any data payload... */
814 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
815 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
816 IPX_MAX_PPROP_HOPS * sizeof(u32))
817 goto out;
818 /* are we broadcasting this damn thing? */
819 rc = 0;
820 if (!sysctl_ipx_pprop_broadcasting)
821 goto out;
822 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
823 * process it locally. All previous hops broadcasted it, and process it
824 * locally. */
825 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
826 goto out;
827
828 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
829 l = (__be32 *) c;
830
831 /* Don't broadcast packet if already seen this net */
832 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
833 if (*l++ == intrfc->if_netnum)
834 goto out;
835
836 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
837 * position where we will insert recvd netnum into list, later on,
838 * in ipxitf_send */
839 IPX_SKB_CB(skb)->last_hop.index = i;
840 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
841 /* xmit on all other interfaces... */
842 spin_lock_bh(&ipx_interfaces_lock);
843 list_for_each_entry(ifcs, &ipx_interfaces, node) {
844 /* Except unconfigured interfaces */
845 if (!ifcs->if_netnum)
846 continue;
847
848 /* That aren't in the list */
849 if (ifcs == intrfc)
850 continue;
851 l = (__be32 *) c;
852 /* don't consider the last entry in the packet list,
853 * it is our netnum, and it is not there yet */
854 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
855 if (ifcs->if_netnum == *l++)
856 break;
857 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
858 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
859
860 if (s) {
861 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
862 ipxrtr_route_skb(s);
863 }
864 }
865 }
866 spin_unlock_bh(&ipx_interfaces_lock);
867out:
868 return rc;
869}
870
871static void ipxitf_insert(struct ipx_interface *intrfc)
872{
873 spin_lock_bh(&ipx_interfaces_lock);
874 list_add_tail(&intrfc->node, &ipx_interfaces);
875 spin_unlock_bh(&ipx_interfaces_lock);
876
877 if (ipxcfg_auto_select_primary && !ipx_primary_net)
878 ipx_primary_net = intrfc;
879}
880
881static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
882 __be16 dlink_type,
883 struct datalink_proto *dlink,
884 unsigned char internal,
885 int ipx_offset)
886{
887 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
888
889 if (intrfc) {
890 intrfc->if_dev = dev;
891 intrfc->if_netnum = netnum;
892 intrfc->if_dlink_type = dlink_type;
893 intrfc->if_dlink = dlink;
894 intrfc->if_internal = internal;
895 intrfc->if_ipx_offset = ipx_offset;
896 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
897 INIT_HLIST_HEAD(&intrfc->if_sklist);
898 atomic_set(&intrfc->refcnt, 1);
899 spin_lock_init(&intrfc->if_sklist_lock);
900 }
901
902 return intrfc;
903}
904
905static int ipxitf_create_internal(struct ipx_interface_definition *idef)
906{
907 struct ipx_interface *intrfc;
908 int rc = -EEXIST;
909
910 /* Only one primary network allowed */
911 if (ipx_primary_net)
912 goto out;
913
914 /* Must have a valid network number */
915 rc = -EADDRNOTAVAIL;
916 if (!idef->ipx_network)
917 goto out;
918 intrfc = ipxitf_find_using_net(idef->ipx_network);
919 rc = -EADDRINUSE;
920 if (intrfc) {
921 ipxitf_put(intrfc);
922 goto out;
923 }
924 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
925 rc = -EAGAIN;
926 if (!intrfc)
927 goto out;
928 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
929 ipx_internal_net = ipx_primary_net = intrfc;
930 ipxitf_hold(intrfc);
931 ipxitf_insert(intrfc);
932
933 rc = ipxitf_add_local_route(intrfc);
934 ipxitf_put(intrfc);
935out:
936 return rc;
937}
938
939static __be16 ipx_map_frame_type(unsigned char type)
940{
941 __be16 rc = 0;
942
943 switch (type) {
944 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
945 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
946 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
947 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
948 }
949
950 return rc;
951}
952
953static int ipxitf_create(struct ipx_interface_definition *idef)
954{
955 struct net_device *dev;
956 __be16 dlink_type = 0;
957 struct datalink_proto *datalink = NULL;
958 struct ipx_interface *intrfc;
959 int rc;
960
961 if (idef->ipx_special == IPX_INTERNAL) {
962 rc = ipxitf_create_internal(idef);
963 goto out;
964 }
965
966 rc = -EEXIST;
967 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
968 goto out;
969
970 intrfc = ipxitf_find_using_net(idef->ipx_network);
971 rc = -EADDRINUSE;
972 if (idef->ipx_network && intrfc) {
973 ipxitf_put(intrfc);
974 goto out;
975 }
976
977 if (intrfc)
978 ipxitf_put(intrfc);
979
980 dev = dev_get_by_name(&init_net, idef->ipx_device);
981 rc = -ENODEV;
982 if (!dev)
983 goto out;
984
985 switch (idef->ipx_dlink_type) {
986 case IPX_FRAME_TR_8022:
987 printk(KERN_WARNING "IPX frame type 802.2TR is "
988 "obsolete Use 802.2 instead.\n");
989 /* fall through */
990 case IPX_FRAME_8022:
991 dlink_type = htons(ETH_P_802_2);
992 datalink = p8022_datalink;
993 break;
994 case IPX_FRAME_ETHERII:
995 if (dev->type != ARPHRD_IEEE802) {
996 dlink_type = htons(ETH_P_IPX);
997 datalink = pEII_datalink;
998 break;
999 } else
1000 printk(KERN_WARNING "IPX frame type EtherII over "
1001 "token-ring is obsolete. Use SNAP "
1002 "instead.\n");
1003 /* fall through */
1004 case IPX_FRAME_SNAP:
1005 dlink_type = htons(ETH_P_SNAP);
1006 datalink = pSNAP_datalink;
1007 break;
1008 case IPX_FRAME_8023:
1009 dlink_type = htons(ETH_P_802_3);
1010 datalink = p8023_datalink;
1011 break;
1012 case IPX_FRAME_NONE:
1013 default:
1014 rc = -EPROTONOSUPPORT;
1015 goto out_dev;
1016 }
1017
1018 rc = -ENETDOWN;
1019 if (!(dev->flags & IFF_UP))
1020 goto out_dev;
1021
1022 /* Check addresses are suitable */
1023 rc = -EINVAL;
1024 if (dev->addr_len > IPX_NODE_LEN)
1025 goto out_dev;
1026
1027 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1028 if (!intrfc) {
1029 /* Ok now create */
1030 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1031 datalink, 0, dev->hard_header_len +
1032 datalink->header_length);
1033 rc = -EAGAIN;
1034 if (!intrfc)
1035 goto out_dev;
1036 /* Setup primary if necessary */
1037 if (idef->ipx_special == IPX_PRIMARY)
1038 ipx_primary_net = intrfc;
1039 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1040 IPX_NODE_LEN)) {
1041 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1042 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1043 dev->dev_addr, dev->addr_len);
1044 } else
1045 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1046 ipxitf_hold(intrfc);
1047 ipxitf_insert(intrfc);
1048 }
1049
1050
1051 /* If the network number is known, add a route */
1052 rc = 0;
1053 if (!intrfc->if_netnum)
1054 goto out_intrfc;
1055
1056 rc = ipxitf_add_local_route(intrfc);
1057out_intrfc:
1058 ipxitf_put(intrfc);
1059 goto out;
1060out_dev:
1061 dev_put(dev);
1062out:
1063 return rc;
1064}
1065
1066static int ipxitf_delete(struct ipx_interface_definition *idef)
1067{
1068 struct net_device *dev = NULL;
1069 __be16 dlink_type = 0;
1070 struct ipx_interface *intrfc;
1071 int rc = 0;
1072
1073 spin_lock_bh(&ipx_interfaces_lock);
1074 if (idef->ipx_special == IPX_INTERNAL) {
1075 if (ipx_internal_net) {
1076 __ipxitf_put(ipx_internal_net);
1077 goto out;
1078 }
1079 rc = -ENOENT;
1080 goto out;
1081 }
1082
1083 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1084 rc = -EPROTONOSUPPORT;
1085 if (!dlink_type)
1086 goto out;
1087
1088 dev = __dev_get_by_name(&init_net, idef->ipx_device);
1089 rc = -ENODEV;
1090 if (!dev)
1091 goto out;
1092
1093 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1094 rc = -EINVAL;
1095 if (!intrfc)
1096 goto out;
1097 __ipxitf_put(intrfc);
1098
1099 rc = 0;
1100out:
1101 spin_unlock_bh(&ipx_interfaces_lock);
1102 return rc;
1103}
1104
1105static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1106 __be16 dlink_type)
1107{
1108 struct ipx_interface *intrfc = NULL;
1109 struct datalink_proto *datalink;
1110
1111 if (!dev)
1112 goto out;
1113
1114 /* Check addresses are suitable */
1115 if (dev->addr_len > IPX_NODE_LEN)
1116 goto out;
1117
1118 switch (ntohs(dlink_type)) {
1119 case ETH_P_IPX: datalink = pEII_datalink; break;
1120 case ETH_P_802_2: datalink = p8022_datalink; break;
1121 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1122 case ETH_P_802_3: datalink = p8023_datalink; break;
1123 default: goto out;
1124 }
1125
1126 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1127 dev->hard_header_len + datalink->header_length);
1128
1129 if (intrfc) {
1130 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1131 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1132 dev->dev_addr, dev->addr_len);
1133 spin_lock_init(&intrfc->if_sklist_lock);
1134 atomic_set(&intrfc->refcnt, 1);
1135 ipxitf_insert(intrfc);
1136 dev_hold(dev);
1137 }
1138
1139out:
1140 return intrfc;
1141}
1142
1143static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1144{
1145 int rc = -EINVAL;
1146 struct ifreq ifr;
1147 int val;
1148
1149 switch (cmd) {
1150 case SIOCSIFADDR: {
1151 struct sockaddr_ipx *sipx;
1152 struct ipx_interface_definition f;
1153
1154 rc = -EFAULT;
1155 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1156 break;
1157 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1158 rc = -EINVAL;
1159 if (sipx->sipx_family != AF_IPX)
1160 break;
1161 f.ipx_network = sipx->sipx_network;
1162 memcpy(f.ipx_device, ifr.ifr_name,
1163 sizeof(f.ipx_device));
1164 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1165 f.ipx_dlink_type = sipx->sipx_type;
1166 f.ipx_special = sipx->sipx_special;
1167
1168 if (sipx->sipx_action == IPX_DLTITF)
1169 rc = ipxitf_delete(&f);
1170 else
1171 rc = ipxitf_create(&f);
1172 break;
1173 }
1174 case SIOCGIFADDR: {
1175 struct sockaddr_ipx *sipx;
1176 struct ipx_interface *ipxif;
1177 struct net_device *dev;
1178
1179 rc = -EFAULT;
1180 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1181 break;
1182 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1183 dev = __dev_get_by_name(&init_net, ifr.ifr_name);
1184 rc = -ENODEV;
1185 if (!dev)
1186 break;
1187 ipxif = ipxitf_find_using_phys(dev,
1188 ipx_map_frame_type(sipx->sipx_type));
1189 rc = -EADDRNOTAVAIL;
1190 if (!ipxif)
1191 break;
1192
1193 sipx->sipx_family = AF_IPX;
1194 sipx->sipx_network = ipxif->if_netnum;
1195 memcpy(sipx->sipx_node, ipxif->if_node,
1196 sizeof(sipx->sipx_node));
1197 rc = -EFAULT;
1198 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1199 break;
1200 ipxitf_put(ipxif);
1201 rc = 0;
1202 break;
1203 }
1204 case SIOCAIPXITFCRT:
1205 rc = -EFAULT;
1206 if (get_user(val, (unsigned char __user *) arg))
1207 break;
1208 rc = 0;
1209 ipxcfg_auto_create_interfaces = val;
1210 break;
1211 case SIOCAIPXPRISLT:
1212 rc = -EFAULT;
1213 if (get_user(val, (unsigned char __user *) arg))
1214 break;
1215 rc = 0;
1216 ipxcfg_set_auto_select(val);
1217 break;
1218 }
1219
1220 return rc;
1221}
1222
1223/*
1224 * Checksum routine for IPX
1225 */
1226
1227/* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1228/* This functions should *not* mess with packet contents */
1229
1230__be16 ipx_cksum(struct ipxhdr *packet, int length)
1231{
1232 /*
1233 * NOTE: sum is a net byte order quantity, which optimizes the
1234 * loop. This only works on big and little endian machines. (I
1235 * don't know of a machine that isn't.)
1236 */
1237 /* handle the first 3 words separately; checksum should be skipped
1238 * and ipx_tctrl masked out */
1239 __u16 *p = (__u16 *)packet;
1240 __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff));
1241 __u32 i = (length >> 1) - 3; /* Number of remaining complete words */
1242
1243 /* Loop through them */
1244 p += 3;
1245 while (i--)
1246 sum += *p++;
1247
1248 /* Add on the last part word if it exists */
1249 if (packet->ipx_pktsize & htons(1))
1250 sum += (__force u16)htons(0xff00) & *p;
1251
1252 /* Do final fixup */
1253 sum = (sum & 0xffff) + (sum >> 16);
1254
1255 /* It's a pity there's no concept of carry in C */
1256 if (sum >= 0x10000)
1257 sum++;
1258
1259 /*
1260 * Leave 0 alone; we don't want 0xffff here. Note that we can't get
1261 * here with 0x10000, so this check is the same as ((__u16)sum)
1262 */
1263 if (sum)
1264 sum = ~sum;
1265
1266 return (__force __be16)sum;
1267}
1268
1269const char *ipx_frame_name(__be16 frame)
1270{
1271 char* rc = "None";
1272
1273 switch (ntohs(frame)) {
1274 case ETH_P_IPX: rc = "EtherII"; break;
1275 case ETH_P_802_2: rc = "802.2"; break;
1276 case ETH_P_SNAP: rc = "SNAP"; break;
1277 case ETH_P_802_3: rc = "802.3"; break;
1278 case ETH_P_TR_802_2: rc = "802.2TR"; break;
1279 }
1280
1281 return rc;
1282}
1283
1284const char *ipx_device_name(struct ipx_interface *intrfc)
1285{
1286 return intrfc->if_internal ? "Internal" :
1287 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1288}
1289
1290/* Handling for system calls applied via the various interfaces to an IPX
1291 * socket object. */
1292
1293static int ipx_setsockopt(struct socket *sock, int level, int optname,
1294 char __user *optval, unsigned int optlen)
1295{
1296 struct sock *sk = sock->sk;
1297 int opt;
1298 int rc = -EINVAL;
1299
1300 lock_sock(sk);
1301 if (optlen != sizeof(int))
1302 goto out;
1303
1304 rc = -EFAULT;
1305 if (get_user(opt, (unsigned int __user *)optval))
1306 goto out;
1307
1308 rc = -ENOPROTOOPT;
1309 if (!(level == SOL_IPX && optname == IPX_TYPE))
1310 goto out;
1311
1312 ipx_sk(sk)->type = opt;
1313 rc = 0;
1314out:
1315 release_sock(sk);
1316 return rc;
1317}
1318
1319static int ipx_getsockopt(struct socket *sock, int level, int optname,
1320 char __user *optval, int __user *optlen)
1321{
1322 struct sock *sk = sock->sk;
1323 int val = 0;
1324 int len;
1325 int rc = -ENOPROTOOPT;
1326
1327 lock_sock(sk);
1328 if (!(level == SOL_IPX && optname == IPX_TYPE))
1329 goto out;
1330
1331 val = ipx_sk(sk)->type;
1332
1333 rc = -EFAULT;
1334 if (get_user(len, optlen))
1335 goto out;
1336
1337 len = min_t(unsigned int, len, sizeof(int));
1338 rc = -EINVAL;
1339 if(len < 0)
1340 goto out;
1341
1342 rc = -EFAULT;
1343 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1344 goto out;
1345
1346 rc = 0;
1347out:
1348 release_sock(sk);
1349 return rc;
1350}
1351
1352static struct proto ipx_proto = {
1353 .name = "IPX",
1354 .owner = THIS_MODULE,
1355 .obj_size = sizeof(struct ipx_sock),
1356};
1357
1358static int ipx_create(struct net *net, struct socket *sock, int protocol,
1359 int kern)
1360{
1361 int rc = -ESOCKTNOSUPPORT;
1362 struct sock *sk;
1363
1364 if (!net_eq(net, &init_net))
1365 return -EAFNOSUPPORT;
1366
1367 /*
1368 * SPX support is not anymore in the kernel sources. If you want to
1369 * ressurrect it, completing it and making it understand shared skbs,
1370 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1371 * tree.
1372 */
1373 if (sock->type != SOCK_DGRAM)
1374 goto out;
1375
1376 rc = -ENOMEM;
1377 sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto);
1378 if (!sk)
1379 goto out;
1380
1381 sk_refcnt_debug_inc(sk);
1382 sock_init_data(sock, sk);
1383 sk->sk_no_check = 1; /* Checksum off by default */
1384 sock->ops = &ipx_dgram_ops;
1385 rc = 0;
1386out:
1387 return rc;
1388}
1389
1390static int ipx_release(struct socket *sock)
1391{
1392 struct sock *sk = sock->sk;
1393
1394 if (!sk)
1395 goto out;
1396
1397 lock_sock(sk);
1398 if (!sock_flag(sk, SOCK_DEAD))
1399 sk->sk_state_change(sk);
1400
1401 sock_set_flag(sk, SOCK_DEAD);
1402 sock->sk = NULL;
1403 sk_refcnt_debug_release(sk);
1404 ipx_destroy_socket(sk);
1405 release_sock(sk);
1406 sock_put(sk);
1407out:
1408 return 0;
1409}
1410
1411/* caller must hold a reference to intrfc */
1412
1413static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
1414{
1415 unsigned short socketNum = intrfc->if_sknum;
1416
1417 spin_lock_bh(&intrfc->if_sklist_lock);
1418
1419 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1420 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1421
1422 while (__ipxitf_find_socket(intrfc, htons(socketNum)))
1423 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1424 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1425 else
1426 socketNum++;
1427
1428 spin_unlock_bh(&intrfc->if_sklist_lock);
1429 intrfc->if_sknum = socketNum;
1430
1431 return htons(socketNum);
1432}
1433
1434static int __ipx_bind(struct socket *sock,
1435 struct sockaddr *uaddr, int addr_len)
1436{
1437 struct sock *sk = sock->sk;
1438 struct ipx_sock *ipxs = ipx_sk(sk);
1439 struct ipx_interface *intrfc;
1440 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1441 int rc = -EINVAL;
1442
1443 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1444 goto out;
1445
1446 intrfc = ipxitf_find_using_net(addr->sipx_network);
1447 rc = -EADDRNOTAVAIL;
1448 if (!intrfc)
1449 goto out;
1450
1451 if (!addr->sipx_port) {
1452 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1453 rc = -EINVAL;
1454 if (!addr->sipx_port)
1455 goto out_put;
1456 }
1457
1458 /* protect IPX system stuff like routing/sap */
1459 rc = -EACCES;
1460 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1461 !capable(CAP_NET_ADMIN))
1462 goto out_put;
1463
1464 ipxs->port = addr->sipx_port;
1465
1466#ifdef CONFIG_IPX_INTERN
1467 if (intrfc == ipx_internal_net) {
1468 /* The source address is to be set explicitly if the
1469 * socket is to be bound on the internal network. If a
1470 * node number 0 was specified, the default is used.
1471 */
1472
1473 rc = -EINVAL;
1474 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1475 goto out_put;
1476 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1477 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1478 else
1479 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1480
1481 rc = -EADDRINUSE;
1482 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1483 ipxs->port)) {
1484 SOCK_DEBUG(sk,
1485 "IPX: bind failed because port %X in use.\n",
1486 ntohs(addr->sipx_port));
1487 goto out_put;
1488 }
1489 } else {
1490 /* Source addresses are easy. It must be our
1491 * network:node pair for an interface routed to IPX
1492 * with the ipx routing ioctl()
1493 */
1494
1495 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1496
1497 rc = -EADDRINUSE;
1498 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1499 SOCK_DEBUG(sk,
1500 "IPX: bind failed because port %X in use.\n",
1501 ntohs(addr->sipx_port));
1502 goto out_put;
1503 }
1504 }
1505
1506#else /* !def CONFIG_IPX_INTERN */
1507
1508 /* Source addresses are easy. It must be our network:node pair for
1509 an interface routed to IPX with the ipx routing ioctl() */
1510
1511 rc = -EADDRINUSE;
1512 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1513 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1514 ntohs((int)addr->sipx_port));
1515 goto out_put;
1516 }
1517
1518#endif /* CONFIG_IPX_INTERN */
1519
1520 ipxitf_insert_socket(intrfc, sk);
1521 sock_reset_flag(sk, SOCK_ZAPPED);
1522
1523 rc = 0;
1524out_put:
1525 ipxitf_put(intrfc);
1526out:
1527 return rc;
1528}
1529
1530static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1531{
1532 struct sock *sk = sock->sk;
1533 int rc;
1534
1535 lock_sock(sk);
1536 rc = __ipx_bind(sock, uaddr, addr_len);
1537 release_sock(sk);
1538
1539 return rc;
1540}
1541
1542static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1543 int addr_len, int flags)
1544{
1545 struct sock *sk = sock->sk;
1546 struct ipx_sock *ipxs = ipx_sk(sk);
1547 struct sockaddr_ipx *addr;
1548 int rc = -EINVAL;
1549 struct ipx_route *rt;
1550
1551 sk->sk_state = TCP_CLOSE;
1552 sock->state = SS_UNCONNECTED;
1553
1554 lock_sock(sk);
1555 if (addr_len != sizeof(*addr))
1556 goto out;
1557 addr = (struct sockaddr_ipx *)uaddr;
1558
1559 /* put the autobinding in */
1560 if (!ipxs->port) {
1561 struct sockaddr_ipx uaddr;
1562
1563 uaddr.sipx_port = 0;
1564 uaddr.sipx_network = 0;
1565
1566#ifdef CONFIG_IPX_INTERN
1567 rc = -ENETDOWN;
1568 if (!ipxs->intrfc)
1569 goto out; /* Someone zonked the iface */
1570 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1571 IPX_NODE_LEN);
1572#endif /* CONFIG_IPX_INTERN */
1573
1574 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1575 sizeof(struct sockaddr_ipx));
1576 if (rc)
1577 goto out;
1578 }
1579
1580 /* We can either connect to primary network or somewhere
1581 * we can route to */
1582 rt = ipxrtr_lookup(addr->sipx_network);
1583 rc = -ENETUNREACH;
1584 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1585 goto out;
1586
1587 ipxs->dest_addr.net = addr->sipx_network;
1588 ipxs->dest_addr.sock = addr->sipx_port;
1589 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1590 ipxs->type = addr->sipx_type;
1591
1592 if (sock->type == SOCK_DGRAM) {
1593 sock->state = SS_CONNECTED;
1594 sk->sk_state = TCP_ESTABLISHED;
1595 }
1596
1597 if (rt)
1598 ipxrtr_put(rt);
1599 rc = 0;
1600out:
1601 release_sock(sk);
1602 return rc;
1603}
1604
1605
1606static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1607 int *uaddr_len, int peer)
1608{
1609 struct ipx_address *addr;
1610 struct sockaddr_ipx sipx;
1611 struct sock *sk = sock->sk;
1612 struct ipx_sock *ipxs = ipx_sk(sk);
1613 int rc;
1614
1615 *uaddr_len = sizeof(struct sockaddr_ipx);
1616
1617 lock_sock(sk);
1618 if (peer) {
1619 rc = -ENOTCONN;
1620 if (sk->sk_state != TCP_ESTABLISHED)
1621 goto out;
1622
1623 addr = &ipxs->dest_addr;
1624 sipx.sipx_network = addr->net;
1625 sipx.sipx_port = addr->sock;
1626 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1627 } else {
1628 if (ipxs->intrfc) {
1629 sipx.sipx_network = ipxs->intrfc->if_netnum;
1630#ifdef CONFIG_IPX_INTERN
1631 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1632#else
1633 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1634 IPX_NODE_LEN);
1635#endif /* CONFIG_IPX_INTERN */
1636
1637 } else {
1638 sipx.sipx_network = 0;
1639 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1640 }
1641
1642 sipx.sipx_port = ipxs->port;
1643 }
1644
1645 sipx.sipx_family = AF_IPX;
1646 sipx.sipx_type = ipxs->type;
1647 sipx.sipx_zero = 0;
1648 memcpy(uaddr, &sipx, sizeof(sipx));
1649
1650 rc = 0;
1651out:
1652 release_sock(sk);
1653 return rc;
1654}
1655
1656static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1657{
1658 /* NULL here for pt means the packet was looped back */
1659 struct ipx_interface *intrfc;
1660 struct ipxhdr *ipx;
1661 u16 ipx_pktsize;
1662 int rc = 0;
1663
1664 if (!net_eq(dev_net(dev), &init_net))
1665 goto drop;
1666
1667 /* Not ours */
1668 if (skb->pkt_type == PACKET_OTHERHOST)
1669 goto drop;
1670
1671 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1672 goto out;
1673
1674 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1675 goto drop;
1676
1677 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
1678
1679 /* Too small or invalid header? */
1680 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1681 !pskb_may_pull(skb, ipx_pktsize))
1682 goto drop;
1683
1684 ipx = ipx_hdr(skb);
1685 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1686 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1687 goto drop;
1688
1689 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1690 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1691 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1692
1693 /* Determine what local ipx endpoint this is */
1694 intrfc = ipxitf_find_using_phys(dev, pt->type);
1695 if (!intrfc) {
1696 if (ipxcfg_auto_create_interfaces &&
1697 IPX_SKB_CB(skb)->ipx_dest_net) {
1698 intrfc = ipxitf_auto_create(dev, pt->type);
1699 if (intrfc)
1700 ipxitf_hold(intrfc);
1701 }
1702
1703 if (!intrfc) /* Not one of ours */
1704 /* or invalid packet for auto creation */
1705 goto drop;
1706 }
1707
1708 rc = ipxitf_rcv(intrfc, skb);
1709 ipxitf_put(intrfc);
1710 goto out;
1711drop:
1712 kfree_skb(skb);
1713out:
1714 return rc;
1715}
1716
1717static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1718 struct msghdr *msg, size_t len)
1719{
1720 struct sock *sk = sock->sk;
1721 struct ipx_sock *ipxs = ipx_sk(sk);
1722 struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name;
1723 struct sockaddr_ipx local_sipx;
1724 int rc = -EINVAL;
1725 int flags = msg->msg_flags;
1726
1727 lock_sock(sk);
1728 /* Socket gets bound below anyway */
1729/* if (sk->sk_zapped)
1730 return -EIO; */ /* Socket not bound */
1731 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1732 goto out;
1733
1734 /* Max possible packet size limited by 16 bit pktsize in header */
1735 if (len >= 65535 - sizeof(struct ipxhdr))
1736 goto out;
1737
1738 if (usipx) {
1739 if (!ipxs->port) {
1740 struct sockaddr_ipx uaddr;
1741
1742 uaddr.sipx_port = 0;
1743 uaddr.sipx_network = 0;
1744#ifdef CONFIG_IPX_INTERN
1745 rc = -ENETDOWN;
1746 if (!ipxs->intrfc)
1747 goto out; /* Someone zonked the iface */
1748 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1749 IPX_NODE_LEN);
1750#endif
1751 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1752 sizeof(struct sockaddr_ipx));
1753 if (rc)
1754 goto out;
1755 }
1756
1757 rc = -EINVAL;
1758 if (msg->msg_namelen < sizeof(*usipx) ||
1759 usipx->sipx_family != AF_IPX)
1760 goto out;
1761 } else {
1762 rc = -ENOTCONN;
1763 if (sk->sk_state != TCP_ESTABLISHED)
1764 goto out;
1765
1766 usipx = &local_sipx;
1767 usipx->sipx_family = AF_IPX;
1768 usipx->sipx_type = ipxs->type;
1769 usipx->sipx_port = ipxs->dest_addr.sock;
1770 usipx->sipx_network = ipxs->dest_addr.net;
1771 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1772 }
1773
1774 rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len,
1775 flags & MSG_DONTWAIT);
1776 if (rc >= 0)
1777 rc = len;
1778out:
1779 release_sock(sk);
1780 return rc;
1781}
1782
1783
1784static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1785 struct msghdr *msg, size_t size, int flags)
1786{
1787 struct sock *sk = sock->sk;
1788 struct ipx_sock *ipxs = ipx_sk(sk);
1789 struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name;
1790 struct ipxhdr *ipx = NULL;
1791 struct sk_buff *skb;
1792 int copied, rc;
1793
1794 lock_sock(sk);
1795 /* put the autobinding in */
1796 if (!ipxs->port) {
1797 struct sockaddr_ipx uaddr;
1798
1799 uaddr.sipx_port = 0;
1800 uaddr.sipx_network = 0;
1801
1802#ifdef CONFIG_IPX_INTERN
1803 rc = -ENETDOWN;
1804 if (!ipxs->intrfc)
1805 goto out; /* Someone zonked the iface */
1806 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1807#endif /* CONFIG_IPX_INTERN */
1808
1809 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1810 sizeof(struct sockaddr_ipx));
1811 if (rc)
1812 goto out;
1813 }
1814
1815 rc = -ENOTCONN;
1816 if (sock_flag(sk, SOCK_ZAPPED))
1817 goto out;
1818
1819 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1820 flags & MSG_DONTWAIT, &rc);
1821 if (!skb)
1822 goto out;
1823
1824 ipx = ipx_hdr(skb);
1825 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1826 if (copied > size) {
1827 copied = size;
1828 msg->msg_flags |= MSG_TRUNC;
1829 }
1830
1831 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1832 copied);
1833 if (rc)
1834 goto out_free;
1835 if (skb->tstamp.tv64)
1836 sk->sk_stamp = skb->tstamp;
1837
1838 msg->msg_namelen = sizeof(*sipx);
1839
1840 if (sipx) {
1841 sipx->sipx_family = AF_IPX;
1842 sipx->sipx_port = ipx->ipx_source.sock;
1843 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1844 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1845 sipx->sipx_type = ipx->ipx_type;
1846 sipx->sipx_zero = 0;
1847 }
1848 rc = copied;
1849
1850out_free:
1851 skb_free_datagram(sk, skb);
1852out:
1853 release_sock(sk);
1854 return rc;
1855}
1856
1857
1858static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1859{
1860 int rc = 0;
1861 long amount = 0;
1862 struct sock *sk = sock->sk;
1863 void __user *argp = (void __user *)arg;
1864
1865 lock_sock(sk);
1866 switch (cmd) {
1867 case TIOCOUTQ:
1868 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1869 if (amount < 0)
1870 amount = 0;
1871 rc = put_user(amount, (int __user *)argp);
1872 break;
1873 case TIOCINQ: {
1874 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1875 /* These two are safe on a single CPU system as only
1876 * user tasks fiddle here */
1877 if (skb)
1878 amount = skb->len - sizeof(struct ipxhdr);
1879 rc = put_user(amount, (int __user *)argp);
1880 break;
1881 }
1882 case SIOCADDRT:
1883 case SIOCDELRT:
1884 rc = -EPERM;
1885 if (capable(CAP_NET_ADMIN))
1886 rc = ipxrtr_ioctl(cmd, argp);
1887 break;
1888 case SIOCSIFADDR:
1889 case SIOCAIPXITFCRT:
1890 case SIOCAIPXPRISLT:
1891 rc = -EPERM;
1892 if (!capable(CAP_NET_ADMIN))
1893 break;
1894 case SIOCGIFADDR:
1895 rc = ipxitf_ioctl(cmd, argp);
1896 break;
1897 case SIOCIPXCFGDATA:
1898 rc = ipxcfg_get_config_data(argp);
1899 break;
1900 case SIOCIPXNCPCONN:
1901 /*
1902 * This socket wants to take care of the NCP connection
1903 * handed to us in arg.
1904 */
1905 rc = -EPERM;
1906 if (!capable(CAP_NET_ADMIN))
1907 break;
1908 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1909 (const unsigned short __user *)argp);
1910 break;
1911 case SIOCGSTAMP:
1912 rc = -EINVAL;
1913 if (sk)
1914 rc = sock_get_timestamp(sk, argp);
1915 break;
1916 case SIOCGIFDSTADDR:
1917 case SIOCSIFDSTADDR:
1918 case SIOCGIFBRDADDR:
1919 case SIOCSIFBRDADDR:
1920 case SIOCGIFNETMASK:
1921 case SIOCSIFNETMASK:
1922 rc = -EINVAL;
1923 break;
1924 default:
1925 rc = -ENOIOCTLCMD;
1926 break;
1927 }
1928 release_sock(sk);
1929
1930 return rc;
1931}
1932
1933
1934#ifdef CONFIG_COMPAT
1935static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1936{
1937 /*
1938 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1939 * commands is handled by generic ioctl code. As these commands are
1940 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1941 * code.
1942 */
1943 switch (cmd) {
1944 case SIOCAIPXITFCRT:
1945 case SIOCAIPXPRISLT:
1946 case SIOCIPXCFGDATA:
1947 case SIOCIPXNCPCONN:
1948 return ipx_ioctl(sock, cmd, arg);
1949 default:
1950 return -ENOIOCTLCMD;
1951 }
1952}
1953#endif
1954
1955
1956/*
1957 * Socket family declarations
1958 */
1959
1960static const struct net_proto_family ipx_family_ops = {
1961 .family = PF_IPX,
1962 .create = ipx_create,
1963 .owner = THIS_MODULE,
1964};
1965
1966static const struct proto_ops ipx_dgram_ops = {
1967 .family = PF_IPX,
1968 .owner = THIS_MODULE,
1969 .release = ipx_release,
1970 .bind = ipx_bind,
1971 .connect = ipx_connect,
1972 .socketpair = sock_no_socketpair,
1973 .accept = sock_no_accept,
1974 .getname = ipx_getname,
1975 .poll = datagram_poll,
1976 .ioctl = ipx_ioctl,
1977#ifdef CONFIG_COMPAT
1978 .compat_ioctl = ipx_compat_ioctl,
1979#endif
1980 .listen = sock_no_listen,
1981 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1982 .setsockopt = ipx_setsockopt,
1983 .getsockopt = ipx_getsockopt,
1984 .sendmsg = ipx_sendmsg,
1985 .recvmsg = ipx_recvmsg,
1986 .mmap = sock_no_mmap,
1987 .sendpage = sock_no_sendpage,
1988};
1989
1990static struct packet_type ipx_8023_packet_type __read_mostly = {
1991 .type = cpu_to_be16(ETH_P_802_3),
1992 .func = ipx_rcv,
1993};
1994
1995static struct packet_type ipx_dix_packet_type __read_mostly = {
1996 .type = cpu_to_be16(ETH_P_IPX),
1997 .func = ipx_rcv,
1998};
1999
2000static struct notifier_block ipx_dev_notifier = {
2001 .notifier_call = ipxitf_device_event,
2002};
2003
2004extern struct datalink_proto *make_EII_client(void);
2005extern void destroy_EII_client(struct datalink_proto *);
2006
2007static const unsigned char ipx_8022_type = 0xE0;
2008static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
2009static const char ipx_EII_err_msg[] __initconst =
2010 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
2011static const char ipx_8023_err_msg[] __initconst =
2012 KERN_CRIT "IPX: Unable to register with 802.3\n";
2013static const char ipx_llc_err_msg[] __initconst =
2014 KERN_CRIT "IPX: Unable to register with 802.2\n";
2015static const char ipx_snap_err_msg[] __initconst =
2016 KERN_CRIT "IPX: Unable to register with SNAP\n";
2017
2018static int __init ipx_init(void)
2019{
2020 int rc = proto_register(&ipx_proto, 1);
2021
2022 if (rc != 0)
2023 goto out;
2024
2025 sock_register(&ipx_family_ops);
2026
2027 pEII_datalink = make_EII_client();
2028 if (pEII_datalink)
2029 dev_add_pack(&ipx_dix_packet_type);
2030 else
2031 printk(ipx_EII_err_msg);
2032
2033 p8023_datalink = make_8023_client();
2034 if (p8023_datalink)
2035 dev_add_pack(&ipx_8023_packet_type);
2036 else
2037 printk(ipx_8023_err_msg);
2038
2039 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2040 if (!p8022_datalink)
2041 printk(ipx_llc_err_msg);
2042
2043 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2044 if (!pSNAP_datalink)
2045 printk(ipx_snap_err_msg);
2046
2047 register_netdevice_notifier(&ipx_dev_notifier);
2048 ipx_register_sysctl();
2049 ipx_proc_init();
2050out:
2051 return rc;
2052}
2053
2054static void __exit ipx_proto_finito(void)
2055{
2056 ipx_proc_exit();
2057 ipx_unregister_sysctl();
2058
2059 unregister_netdevice_notifier(&ipx_dev_notifier);
2060
2061 ipxitf_cleanup();
2062
2063 if (pSNAP_datalink) {
2064 unregister_snap_client(pSNAP_datalink);
2065 pSNAP_datalink = NULL;
2066 }
2067
2068 if (p8022_datalink) {
2069 unregister_8022_client(p8022_datalink);
2070 p8022_datalink = NULL;
2071 }
2072
2073 dev_remove_pack(&ipx_8023_packet_type);
2074 if (p8023_datalink) {
2075 destroy_8023_client(p8023_datalink);
2076 p8023_datalink = NULL;
2077 }
2078
2079 dev_remove_pack(&ipx_dix_packet_type);
2080 if (pEII_datalink) {
2081 destroy_EII_client(pEII_datalink);
2082 pEII_datalink = NULL;
2083 }
2084
2085 proto_unregister(&ipx_proto);
2086 sock_unregister(ipx_family_ops.family);
2087}
2088
2089module_init(ipx_init);
2090module_exit(ipx_proto_finito);
2091MODULE_LICENSE("GPL");
2092MODULE_ALIAS_NETPROTO(PF_IPX);
1/*
2 * Implements an IPX socket layer.
3 *
4 * This code is derived from work by
5 * Ross Biro : Writing the original IP stack
6 * Fred Van Kempen : Tidying up the TCP/IP
7 *
8 * Many thanks go to Keith Baker, Institute For Industrial Information
9 * Technology Ltd, Swansea University for allowing me to work on this
10 * in my own time even though it was in some ways related to commercial
11 * work I am currently employed to do there.
12 *
13 * All the material in this file is subject to the Gnu license version 2.
14 * Neither Alan Cox nor the Swansea University Computer Society admit
15 * liability nor provide warranty for any of this software. This material
16 * is provided as is and at no charge.
17 *
18 * Portions Copyright (c) 2000-2003 Conectiva, Inc. <acme@conectiva.com.br>
19 * Neither Arnaldo Carvalho de Melo nor Conectiva, Inc. admit liability nor
20 * provide warranty for any of this software. This material is provided
21 * "AS-IS" and at no charge.
22 *
23 * Portions Copyright (c) 1995 Caldera, Inc. <greg@caldera.com>
24 * Neither Greg Page nor Caldera, Inc. admit liability nor provide
25 * warranty for any of this software. This material is provided
26 * "AS-IS" and at no charge.
27 *
28 * See net/ipx/ChangeLog.
29 */
30
31#include <linux/capability.h>
32#include <linux/errno.h>
33#include <linux/if_arp.h>
34#include <linux/if_ether.h>
35#include <linux/init.h>
36#include <linux/ipx.h>
37#include <linux/kernel.h>
38#include <linux/list.h>
39#include <linux/module.h>
40#include <linux/net.h>
41#include <linux/netdevice.h>
42#include <linux/uio.h>
43#include <linux/slab.h>
44#include <linux/skbuff.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
47#include <linux/string.h>
48#include <linux/types.h>
49#include <linux/termios.h>
50
51#include <net/ipx.h>
52#include <net/p8022.h>
53#include <net/psnap.h>
54#include <net/sock.h>
55#include <net/datalink.h>
56#include <net/tcp_states.h>
57#include <net/net_namespace.h>
58
59#include <asm/uaccess.h>
60
61/* Configuration Variables */
62static unsigned char ipxcfg_max_hops = 16;
63static char ipxcfg_auto_select_primary;
64static char ipxcfg_auto_create_interfaces;
65int sysctl_ipx_pprop_broadcasting = 1;
66
67/* Global Variables */
68static struct datalink_proto *p8022_datalink;
69static struct datalink_proto *pEII_datalink;
70static struct datalink_proto *p8023_datalink;
71static struct datalink_proto *pSNAP_datalink;
72
73static const struct proto_ops ipx_dgram_ops;
74
75LIST_HEAD(ipx_interfaces);
76DEFINE_SPINLOCK(ipx_interfaces_lock);
77
78struct ipx_interface *ipx_primary_net;
79struct ipx_interface *ipx_internal_net;
80
81struct ipx_interface *ipx_interfaces_head(void)
82{
83 struct ipx_interface *rc = NULL;
84
85 if (!list_empty(&ipx_interfaces))
86 rc = list_entry(ipx_interfaces.next,
87 struct ipx_interface, node);
88 return rc;
89}
90
91static void ipxcfg_set_auto_select(char val)
92{
93 ipxcfg_auto_select_primary = val;
94 if (val && !ipx_primary_net)
95 ipx_primary_net = ipx_interfaces_head();
96}
97
98static int ipxcfg_get_config_data(struct ipx_config_data __user *arg)
99{
100 struct ipx_config_data vals;
101
102 vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces;
103 vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary;
104
105 return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0;
106}
107
108/*
109 * Note: Sockets may not be removed _during_ an interrupt or inet_bh
110 * handler using this technique. They can be added although we do not
111 * use this facility.
112 */
113
114static void ipx_remove_socket(struct sock *sk)
115{
116 /* Determine interface with which socket is associated */
117 struct ipx_interface *intrfc = ipx_sk(sk)->intrfc;
118
119 if (!intrfc)
120 goto out;
121
122 ipxitf_hold(intrfc);
123 spin_lock_bh(&intrfc->if_sklist_lock);
124 sk_del_node_init(sk);
125 spin_unlock_bh(&intrfc->if_sklist_lock);
126 ipxitf_put(intrfc);
127out:
128 return;
129}
130
131static void ipx_destroy_socket(struct sock *sk)
132{
133 ipx_remove_socket(sk);
134 skb_queue_purge(&sk->sk_receive_queue);
135 sk_refcnt_debug_dec(sk);
136}
137
138/*
139 * The following code is used to support IPX Interfaces (IPXITF). An
140 * IPX interface is defined by a physical device and a frame type.
141 */
142
143/* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */
144
145static void ipxitf_clear_primary_net(void)
146{
147 ipx_primary_net = NULL;
148 if (ipxcfg_auto_select_primary)
149 ipx_primary_net = ipx_interfaces_head();
150}
151
152static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev,
153 __be16 datalink)
154{
155 struct ipx_interface *i;
156
157 list_for_each_entry(i, &ipx_interfaces, node)
158 if (i->if_dev == dev && i->if_dlink_type == datalink)
159 goto out;
160 i = NULL;
161out:
162 return i;
163}
164
165static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev,
166 __be16 datalink)
167{
168 struct ipx_interface *i;
169
170 spin_lock_bh(&ipx_interfaces_lock);
171 i = __ipxitf_find_using_phys(dev, datalink);
172 if (i)
173 ipxitf_hold(i);
174 spin_unlock_bh(&ipx_interfaces_lock);
175 return i;
176}
177
178struct ipx_interface *ipxitf_find_using_net(__be32 net)
179{
180 struct ipx_interface *i;
181
182 spin_lock_bh(&ipx_interfaces_lock);
183 if (net) {
184 list_for_each_entry(i, &ipx_interfaces, node)
185 if (i->if_netnum == net)
186 goto hold;
187 i = NULL;
188 goto unlock;
189 }
190
191 i = ipx_primary_net;
192 if (i)
193hold:
194 ipxitf_hold(i);
195unlock:
196 spin_unlock_bh(&ipx_interfaces_lock);
197 return i;
198}
199
200/* Sockets are bound to a particular IPX interface. */
201static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk)
202{
203 ipxitf_hold(intrfc);
204 spin_lock_bh(&intrfc->if_sklist_lock);
205 ipx_sk(sk)->intrfc = intrfc;
206 sk_add_node(sk, &intrfc->if_sklist);
207 spin_unlock_bh(&intrfc->if_sklist_lock);
208 ipxitf_put(intrfc);
209}
210
211/* caller must hold intrfc->if_sklist_lock */
212static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc,
213 __be16 port)
214{
215 struct sock *s;
216
217 sk_for_each(s, &intrfc->if_sklist)
218 if (ipx_sk(s)->port == port)
219 goto found;
220 s = NULL;
221found:
222 return s;
223}
224
225/* caller must hold a reference to intrfc */
226static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc,
227 __be16 port)
228{
229 struct sock *s;
230
231 spin_lock_bh(&intrfc->if_sklist_lock);
232 s = __ipxitf_find_socket(intrfc, port);
233 if (s)
234 sock_hold(s);
235 spin_unlock_bh(&intrfc->if_sklist_lock);
236
237 return s;
238}
239
240#ifdef CONFIG_IPX_INTERN
241static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc,
242 unsigned char *ipx_node,
243 __be16 port)
244{
245 struct sock *s;
246
247 ipxitf_hold(intrfc);
248 spin_lock_bh(&intrfc->if_sklist_lock);
249
250 sk_for_each(s, &intrfc->if_sklist) {
251 struct ipx_sock *ipxs = ipx_sk(s);
252
253 if (ipxs->port == port &&
254 !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN))
255 goto found;
256 }
257 s = NULL;
258found:
259 spin_unlock_bh(&intrfc->if_sklist_lock);
260 ipxitf_put(intrfc);
261 return s;
262}
263#endif
264
265static void __ipxitf_down(struct ipx_interface *intrfc)
266{
267 struct sock *s;
268 struct hlist_node *t;
269
270 /* Delete all routes associated with this interface */
271 ipxrtr_del_routes(intrfc);
272
273 spin_lock_bh(&intrfc->if_sklist_lock);
274 /* error sockets */
275 sk_for_each_safe(s, t, &intrfc->if_sklist) {
276 struct ipx_sock *ipxs = ipx_sk(s);
277
278 s->sk_err = ENOLINK;
279 s->sk_error_report(s);
280 ipxs->intrfc = NULL;
281 ipxs->port = 0;
282 sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */
283 sk_del_node_init(s);
284 }
285 INIT_HLIST_HEAD(&intrfc->if_sklist);
286 spin_unlock_bh(&intrfc->if_sklist_lock);
287
288 /* remove this interface from list */
289 list_del(&intrfc->node);
290
291 /* remove this interface from *special* networks */
292 if (intrfc == ipx_primary_net)
293 ipxitf_clear_primary_net();
294 if (intrfc == ipx_internal_net)
295 ipx_internal_net = NULL;
296
297 if (intrfc->if_dev)
298 dev_put(intrfc->if_dev);
299 kfree(intrfc);
300}
301
302void ipxitf_down(struct ipx_interface *intrfc)
303{
304 spin_lock_bh(&ipx_interfaces_lock);
305 __ipxitf_down(intrfc);
306 spin_unlock_bh(&ipx_interfaces_lock);
307}
308
309static void __ipxitf_put(struct ipx_interface *intrfc)
310{
311 if (atomic_dec_and_test(&intrfc->refcnt))
312 __ipxitf_down(intrfc);
313}
314
315static int ipxitf_device_event(struct notifier_block *notifier,
316 unsigned long event, void *ptr)
317{
318 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
319 struct ipx_interface *i, *tmp;
320
321 if (!net_eq(dev_net(dev), &init_net))
322 return NOTIFY_DONE;
323
324 if (event != NETDEV_DOWN && event != NETDEV_UP)
325 goto out;
326
327 spin_lock_bh(&ipx_interfaces_lock);
328 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
329 if (i->if_dev == dev) {
330 if (event == NETDEV_UP)
331 ipxitf_hold(i);
332 else
333 __ipxitf_put(i);
334 }
335 spin_unlock_bh(&ipx_interfaces_lock);
336out:
337 return NOTIFY_DONE;
338}
339
340
341static __exit void ipxitf_cleanup(void)
342{
343 struct ipx_interface *i, *tmp;
344
345 spin_lock_bh(&ipx_interfaces_lock);
346 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
347 __ipxitf_put(i);
348 spin_unlock_bh(&ipx_interfaces_lock);
349}
350
351static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb)
352{
353 if (sock_queue_rcv_skb(sock, skb) < 0)
354 kfree_skb(skb);
355}
356
357/*
358 * On input skb->sk is NULL. Nobody is charged for the memory.
359 */
360
361/* caller must hold a reference to intrfc */
362
363#ifdef CONFIG_IPX_INTERN
364static int ipxitf_demux_socket(struct ipx_interface *intrfc,
365 struct sk_buff *skb, int copy)
366{
367 struct ipxhdr *ipx = ipx_hdr(skb);
368 int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node,
369 IPX_NODE_LEN);
370 struct sock *s;
371 int rc;
372
373 spin_lock_bh(&intrfc->if_sklist_lock);
374
375 sk_for_each(s, &intrfc->if_sklist) {
376 struct ipx_sock *ipxs = ipx_sk(s);
377
378 if (ipxs->port == ipx->ipx_dest.sock &&
379 (is_broadcast || !memcmp(ipx->ipx_dest.node,
380 ipxs->node, IPX_NODE_LEN))) {
381 /* We found a socket to which to send */
382 struct sk_buff *skb1;
383
384 if (copy) {
385 skb1 = skb_clone(skb, GFP_ATOMIC);
386 rc = -ENOMEM;
387 if (!skb1)
388 goto out;
389 } else {
390 skb1 = skb;
391 copy = 1; /* skb may only be used once */
392 }
393 ipxitf_def_skb_handler(s, skb1);
394
395 /* On an external interface, one socket can listen */
396 if (intrfc != ipx_internal_net)
397 break;
398 }
399 }
400
401 /* skb was solely for us, and we did not make a copy, so free it. */
402 if (!copy)
403 kfree_skb(skb);
404
405 rc = 0;
406out:
407 spin_unlock_bh(&intrfc->if_sklist_lock);
408 return rc;
409}
410#else
411static struct sock *ncp_connection_hack(struct ipx_interface *intrfc,
412 struct ipxhdr *ipx)
413{
414 /* The packet's target is a NCP connection handler. We want to hand it
415 * to the correct socket directly within the kernel, so that the
416 * mars_nwe packet distribution process does not have to do it. Here we
417 * only care about NCP and BURST packets.
418 *
419 * You might call this a hack, but believe me, you do not want a
420 * complete NCP layer in the kernel, and this is VERY fast as well. */
421 struct sock *sk = NULL;
422 int connection = 0;
423 u8 *ncphdr = (u8 *)(ipx + 1);
424
425 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
426 connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3);
427 else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */
428 connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8);
429
430 if (connection) {
431 /* Now we have to look for a special NCP connection handling
432 * socket. Only these sockets have ipx_ncp_conn != 0, set by
433 * SIOCIPXNCPCONN. */
434 spin_lock_bh(&intrfc->if_sklist_lock);
435 sk_for_each(sk, &intrfc->if_sklist)
436 if (ipx_sk(sk)->ipx_ncp_conn == connection) {
437 sock_hold(sk);
438 goto found;
439 }
440 sk = NULL;
441 found:
442 spin_unlock_bh(&intrfc->if_sklist_lock);
443 }
444 return sk;
445}
446
447static int ipxitf_demux_socket(struct ipx_interface *intrfc,
448 struct sk_buff *skb, int copy)
449{
450 struct ipxhdr *ipx = ipx_hdr(skb);
451 struct sock *sock1 = NULL, *sock2 = NULL;
452 struct sk_buff *skb1 = NULL, *skb2 = NULL;
453 int rc;
454
455 if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451)
456 sock1 = ncp_connection_hack(intrfc, ipx);
457 if (!sock1)
458 /* No special socket found, forward the packet the normal way */
459 sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock);
460
461 /*
462 * We need to check if there is a primary net and if
463 * this is addressed to one of the *SPECIAL* sockets because
464 * these need to be propagated to the primary net.
465 * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and
466 * 0x456(Diagnostic).
467 */
468
469 if (ipx_primary_net && intrfc != ipx_primary_net) {
470 const int dsock = ntohs(ipx->ipx_dest.sock);
471
472 if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456)
473 /* The appropriate thing to do here is to dup the
474 * packet and route to the primary net interface via
475 * ipxitf_send; however, we'll cheat and just demux it
476 * here. */
477 sock2 = ipxitf_find_socket(ipx_primary_net,
478 ipx->ipx_dest.sock);
479 }
480
481 /*
482 * If there is nothing to do return. The kfree will cancel any charging.
483 */
484 rc = 0;
485 if (!sock1 && !sock2) {
486 if (!copy)
487 kfree_skb(skb);
488 goto out;
489 }
490
491 /*
492 * This next segment of code is a little awkward, but it sets it up
493 * so that the appropriate number of copies of the SKB are made and
494 * that skb1 and skb2 point to it (them) so that it (they) can be
495 * demuxed to sock1 and/or sock2. If we are unable to make enough
496 * copies, we do as much as is possible.
497 */
498
499 if (copy)
500 skb1 = skb_clone(skb, GFP_ATOMIC);
501 else
502 skb1 = skb;
503
504 rc = -ENOMEM;
505 if (!skb1)
506 goto out_put;
507
508 /* Do we need 2 SKBs? */
509 if (sock1 && sock2)
510 skb2 = skb_clone(skb1, GFP_ATOMIC);
511 else
512 skb2 = skb1;
513
514 if (sock1)
515 ipxitf_def_skb_handler(sock1, skb1);
516
517 if (!skb2)
518 goto out_put;
519
520 if (sock2)
521 ipxitf_def_skb_handler(sock2, skb2);
522
523 rc = 0;
524out_put:
525 if (sock1)
526 sock_put(sock1);
527 if (sock2)
528 sock_put(sock2);
529out:
530 return rc;
531}
532#endif /* CONFIG_IPX_INTERN */
533
534static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc,
535 struct sk_buff *skb)
536{
537 struct sk_buff *skb2;
538 int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head;
539 int out_offset = intrfc->if_ipx_offset;
540 int len;
541
542 /* Hopefully, most cases */
543 if (in_offset >= out_offset)
544 return skb;
545
546 /* Need new SKB */
547 len = skb->len + out_offset;
548 skb2 = alloc_skb(len, GFP_ATOMIC);
549 if (skb2) {
550 skb_reserve(skb2, out_offset);
551 skb_reset_network_header(skb2);
552 skb_reset_transport_header(skb2);
553 skb_put(skb2, skb->len);
554 memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len);
555 memcpy(skb2->cb, skb->cb, sizeof(skb->cb));
556 }
557 kfree_skb(skb);
558 return skb2;
559}
560
561/* caller must hold a reference to intrfc and the skb has to be unshared */
562int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node)
563{
564 struct ipxhdr *ipx = ipx_hdr(skb);
565 struct net_device *dev = intrfc->if_dev;
566 struct datalink_proto *dl = intrfc->if_dlink;
567 char dest_node[IPX_NODE_LEN];
568 int send_to_wire = 1;
569 int addr_len;
570
571 ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl;
572 ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net;
573 ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net;
574
575 /* see if we need to include the netnum in the route list */
576 if (IPX_SKB_CB(skb)->last_hop.index >= 0) {
577 __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
578 sizeof(struct ipxhdr) +
579 IPX_SKB_CB(skb)->last_hop.index *
580 sizeof(__be32));
581 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
582 IPX_SKB_CB(skb)->last_hop.index = -1;
583 }
584
585 /*
586 * We need to know how many skbuffs it will take to send out this
587 * packet to avoid unnecessary copies.
588 */
589
590 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
591 send_to_wire = 0; /* No non looped */
592
593 /*
594 * See if this should be demuxed to sockets on this interface
595 *
596 * We want to ensure the original was eaten or that we only use
597 * up clones.
598 */
599
600 if (ipx->ipx_dest.net == intrfc->if_netnum) {
601 /*
602 * To our own node, loop and free the original.
603 * The internal net will receive on all node address.
604 */
605 if (intrfc == ipx_internal_net ||
606 !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) {
607 /* Don't charge sender */
608 skb_orphan(skb);
609
610 /* Will charge receiver */
611 return ipxitf_demux_socket(intrfc, skb, 0);
612 }
613
614 /* Broadcast, loop and possibly keep to send on. */
615 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) {
616 if (!send_to_wire)
617 skb_orphan(skb);
618 ipxitf_demux_socket(intrfc, skb, send_to_wire);
619 if (!send_to_wire)
620 goto out;
621 }
622 }
623
624 /*
625 * If the originating net is not equal to our net; this is routed
626 * We are still charging the sender. Which is right - the driver
627 * free will handle this fairly.
628 */
629 if (ipx->ipx_source.net != intrfc->if_netnum) {
630 /*
631 * Unshare the buffer before modifying the count in
632 * case it's a flood or tcpdump
633 */
634 skb = skb_unshare(skb, GFP_ATOMIC);
635 if (!skb)
636 goto out;
637 if (++ipx->ipx_tctrl > ipxcfg_max_hops)
638 send_to_wire = 0;
639 }
640
641 if (!send_to_wire) {
642 kfree_skb(skb);
643 goto out;
644 }
645
646 /* Determine the appropriate hardware address */
647 addr_len = dev->addr_len;
648 if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN))
649 memcpy(dest_node, dev->broadcast, addr_len);
650 else
651 memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len);
652
653 /* Make any compensation for differing physical/data link size */
654 skb = ipxitf_adjust_skbuff(intrfc, skb);
655 if (!skb)
656 goto out;
657
658 /* set up data link and physical headers */
659 skb->dev = dev;
660 skb->protocol = htons(ETH_P_IPX);
661
662 /* Send it out */
663 dl->request(dl, skb, dest_node);
664out:
665 return 0;
666}
667
668static int ipxitf_add_local_route(struct ipx_interface *intrfc)
669{
670 return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL);
671}
672
673static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
674 struct sk_buff *skb);
675static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb);
676
677static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb)
678{
679 struct ipxhdr *ipx = ipx_hdr(skb);
680 int rc = 0;
681
682 ipxitf_hold(intrfc);
683
684 /* See if we should update our network number */
685 if (!intrfc->if_netnum) /* net number of intrfc not known yet */
686 ipxitf_discover_netnum(intrfc, skb);
687
688 IPX_SKB_CB(skb)->last_hop.index = -1;
689 if (ipx->ipx_type == IPX_TYPE_PPROP) {
690 rc = ipxitf_pprop(intrfc, skb);
691 if (rc)
692 goto out_free_skb;
693 }
694
695 /* local processing follows */
696 if (!IPX_SKB_CB(skb)->ipx_dest_net)
697 IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum;
698 if (!IPX_SKB_CB(skb)->ipx_source_net)
699 IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum;
700
701 /* it doesn't make sense to route a pprop packet, there's no meaning
702 * in the ipx_dest_net for such packets */
703 if (ipx->ipx_type != IPX_TYPE_PPROP &&
704 intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) {
705 /* We only route point-to-point packets. */
706 if (skb->pkt_type == PACKET_HOST) {
707 skb = skb_unshare(skb, GFP_ATOMIC);
708 if (skb)
709 rc = ipxrtr_route_skb(skb);
710 goto out_intrfc;
711 }
712
713 goto out_free_skb;
714 }
715
716 /* see if we should keep it */
717 if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) ||
718 !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) {
719 rc = ipxitf_demux_socket(intrfc, skb, 0);
720 goto out_intrfc;
721 }
722
723 /* we couldn't pawn it off so unload it */
724out_free_skb:
725 kfree_skb(skb);
726out_intrfc:
727 ipxitf_put(intrfc);
728 return rc;
729}
730
731static void ipxitf_discover_netnum(struct ipx_interface *intrfc,
732 struct sk_buff *skb)
733{
734 const struct ipx_cb *cb = IPX_SKB_CB(skb);
735
736 /* see if this is an intra packet: source_net == dest_net */
737 if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) {
738 struct ipx_interface *i =
739 ipxitf_find_using_net(cb->ipx_source_net);
740 /* NB: NetWare servers lie about their hop count so we
741 * dropped the test based on it. This is the best way
742 * to determine this is a 0 hop count packet. */
743 if (!i) {
744 intrfc->if_netnum = cb->ipx_source_net;
745 ipxitf_add_local_route(intrfc);
746 } else {
747 printk(KERN_WARNING "IPX: Network number collision "
748 "%lx\n %s %s and %s %s\n",
749 (unsigned long) ntohl(cb->ipx_source_net),
750 ipx_device_name(i),
751 ipx_frame_name(i->if_dlink_type),
752 ipx_device_name(intrfc),
753 ipx_frame_name(intrfc->if_dlink_type));
754 ipxitf_put(i);
755 }
756 }
757}
758
759/**
760 * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for
761 * NetBIOS broadcasts
762 * @intrfc: IPX interface receiving this packet
763 * @skb: Received packet
764 *
765 * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it
766 * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop
767 * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we
768 * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX
769 * RIP and SAP Router Specification", Part Number 107-000029-001.
770 *
771 * If it is valid, check if we have pprop broadcasting enabled by the user,
772 * if not, just return zero for local processing.
773 *
774 * If it is enabled check the packet and don't broadcast it if we have already
775 * seen this packet.
776 *
777 * Broadcast: send it to the interfaces that aren't on the packet visited nets
778 * array, just after the IPX header.
779 *
780 * Returns -EINVAL for invalid packets, so that the calling function drops
781 * the packet without local processing. 0 if packet is to be locally processed.
782 */
783static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb)
784{
785 struct ipxhdr *ipx = ipx_hdr(skb);
786 int i, rc = -EINVAL;
787 struct ipx_interface *ifcs;
788 char *c;
789 __be32 *l;
790
791 /* Illegal packet - too many hops or too short */
792 /* We decide to throw it away: no broadcasting, no local processing.
793 * NetBIOS unaware implementations route them as normal packets -
794 * tctrl <= 15, any data payload... */
795 if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS ||
796 ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) +
797 IPX_MAX_PPROP_HOPS * sizeof(u32))
798 goto out;
799 /* are we broadcasting this damn thing? */
800 rc = 0;
801 if (!sysctl_ipx_pprop_broadcasting)
802 goto out;
803 /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we
804 * process it locally. All previous hops broadcasted it, and process it
805 * locally. */
806 if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS)
807 goto out;
808
809 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
810 l = (__be32 *) c;
811
812 /* Don't broadcast packet if already seen this net */
813 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
814 if (*l++ == intrfc->if_netnum)
815 goto out;
816
817 /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the
818 * position where we will insert recvd netnum into list, later on,
819 * in ipxitf_send */
820 IPX_SKB_CB(skb)->last_hop.index = i;
821 IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum;
822 /* xmit on all other interfaces... */
823 spin_lock_bh(&ipx_interfaces_lock);
824 list_for_each_entry(ifcs, &ipx_interfaces, node) {
825 /* Except unconfigured interfaces */
826 if (!ifcs->if_netnum)
827 continue;
828
829 /* That aren't in the list */
830 if (ifcs == intrfc)
831 continue;
832 l = (__be32 *) c;
833 /* don't consider the last entry in the packet list,
834 * it is our netnum, and it is not there yet */
835 for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++)
836 if (ifcs->if_netnum == *l++)
837 break;
838 if (i == IPX_SKB_CB(skb)->ipx_tctrl) {
839 struct sk_buff *s = skb_copy(skb, GFP_ATOMIC);
840
841 if (s) {
842 IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum;
843 ipxrtr_route_skb(s);
844 }
845 }
846 }
847 spin_unlock_bh(&ipx_interfaces_lock);
848out:
849 return rc;
850}
851
852static void ipxitf_insert(struct ipx_interface *intrfc)
853{
854 spin_lock_bh(&ipx_interfaces_lock);
855 list_add_tail(&intrfc->node, &ipx_interfaces);
856 spin_unlock_bh(&ipx_interfaces_lock);
857
858 if (ipxcfg_auto_select_primary && !ipx_primary_net)
859 ipx_primary_net = intrfc;
860}
861
862static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
863 __be16 dlink_type,
864 struct datalink_proto *dlink,
865 unsigned char internal,
866 int ipx_offset)
867{
868 struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC);
869
870 if (intrfc) {
871 intrfc->if_dev = dev;
872 intrfc->if_netnum = netnum;
873 intrfc->if_dlink_type = dlink_type;
874 intrfc->if_dlink = dlink;
875 intrfc->if_internal = internal;
876 intrfc->if_ipx_offset = ipx_offset;
877 intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET;
878 INIT_HLIST_HEAD(&intrfc->if_sklist);
879 atomic_set(&intrfc->refcnt, 1);
880 spin_lock_init(&intrfc->if_sklist_lock);
881 }
882
883 return intrfc;
884}
885
886static int ipxitf_create_internal(struct ipx_interface_definition *idef)
887{
888 struct ipx_interface *intrfc;
889 int rc = -EEXIST;
890
891 /* Only one primary network allowed */
892 if (ipx_primary_net)
893 goto out;
894
895 /* Must have a valid network number */
896 rc = -EADDRNOTAVAIL;
897 if (!idef->ipx_network)
898 goto out;
899 intrfc = ipxitf_find_using_net(idef->ipx_network);
900 rc = -EADDRINUSE;
901 if (intrfc) {
902 ipxitf_put(intrfc);
903 goto out;
904 }
905 intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0);
906 rc = -EAGAIN;
907 if (!intrfc)
908 goto out;
909 memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN);
910 ipx_internal_net = ipx_primary_net = intrfc;
911 ipxitf_hold(intrfc);
912 ipxitf_insert(intrfc);
913
914 rc = ipxitf_add_local_route(intrfc);
915 ipxitf_put(intrfc);
916out:
917 return rc;
918}
919
920static __be16 ipx_map_frame_type(unsigned char type)
921{
922 __be16 rc = 0;
923
924 switch (type) {
925 case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break;
926 case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break;
927 case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break;
928 case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break;
929 }
930
931 return rc;
932}
933
934static int ipxitf_create(struct ipx_interface_definition *idef)
935{
936 struct net_device *dev;
937 __be16 dlink_type = 0;
938 struct datalink_proto *datalink = NULL;
939 struct ipx_interface *intrfc;
940 int rc;
941
942 if (idef->ipx_special == IPX_INTERNAL) {
943 rc = ipxitf_create_internal(idef);
944 goto out;
945 }
946
947 rc = -EEXIST;
948 if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net)
949 goto out;
950
951 intrfc = ipxitf_find_using_net(idef->ipx_network);
952 rc = -EADDRINUSE;
953 if (idef->ipx_network && intrfc) {
954 ipxitf_put(intrfc);
955 goto out;
956 }
957
958 if (intrfc)
959 ipxitf_put(intrfc);
960
961 dev = dev_get_by_name(&init_net, idef->ipx_device);
962 rc = -ENODEV;
963 if (!dev)
964 goto out;
965
966 switch (idef->ipx_dlink_type) {
967 case IPX_FRAME_8022:
968 dlink_type = htons(ETH_P_802_2);
969 datalink = p8022_datalink;
970 break;
971 case IPX_FRAME_ETHERII:
972 if (dev->type != ARPHRD_IEEE802) {
973 dlink_type = htons(ETH_P_IPX);
974 datalink = pEII_datalink;
975 break;
976 }
977 /* fall through */
978 case IPX_FRAME_SNAP:
979 dlink_type = htons(ETH_P_SNAP);
980 datalink = pSNAP_datalink;
981 break;
982 case IPX_FRAME_8023:
983 dlink_type = htons(ETH_P_802_3);
984 datalink = p8023_datalink;
985 break;
986 case IPX_FRAME_NONE:
987 default:
988 rc = -EPROTONOSUPPORT;
989 goto out_dev;
990 }
991
992 rc = -ENETDOWN;
993 if (!(dev->flags & IFF_UP))
994 goto out_dev;
995
996 /* Check addresses are suitable */
997 rc = -EINVAL;
998 if (dev->addr_len > IPX_NODE_LEN)
999 goto out_dev;
1000
1001 intrfc = ipxitf_find_using_phys(dev, dlink_type);
1002 if (!intrfc) {
1003 /* Ok now create */
1004 intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type,
1005 datalink, 0, dev->hard_header_len +
1006 datalink->header_length);
1007 rc = -EAGAIN;
1008 if (!intrfc)
1009 goto out_dev;
1010 /* Setup primary if necessary */
1011 if (idef->ipx_special == IPX_PRIMARY)
1012 ipx_primary_net = intrfc;
1013 if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000",
1014 IPX_NODE_LEN)) {
1015 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1016 memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len,
1017 dev->dev_addr, dev->addr_len);
1018 } else
1019 memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN);
1020 ipxitf_hold(intrfc);
1021 ipxitf_insert(intrfc);
1022 }
1023
1024
1025 /* If the network number is known, add a route */
1026 rc = 0;
1027 if (!intrfc->if_netnum)
1028 goto out_intrfc;
1029
1030 rc = ipxitf_add_local_route(intrfc);
1031out_intrfc:
1032 ipxitf_put(intrfc);
1033 goto out;
1034out_dev:
1035 dev_put(dev);
1036out:
1037 return rc;
1038}
1039
1040static int ipxitf_delete(struct ipx_interface_definition *idef)
1041{
1042 struct net_device *dev = NULL;
1043 __be16 dlink_type = 0;
1044 struct ipx_interface *intrfc;
1045 int rc = 0;
1046
1047 spin_lock_bh(&ipx_interfaces_lock);
1048 if (idef->ipx_special == IPX_INTERNAL) {
1049 if (ipx_internal_net) {
1050 __ipxitf_put(ipx_internal_net);
1051 goto out;
1052 }
1053 rc = -ENOENT;
1054 goto out;
1055 }
1056
1057 dlink_type = ipx_map_frame_type(idef->ipx_dlink_type);
1058 rc = -EPROTONOSUPPORT;
1059 if (!dlink_type)
1060 goto out;
1061
1062 dev = __dev_get_by_name(&init_net, idef->ipx_device);
1063 rc = -ENODEV;
1064 if (!dev)
1065 goto out;
1066
1067 intrfc = __ipxitf_find_using_phys(dev, dlink_type);
1068 rc = -EINVAL;
1069 if (!intrfc)
1070 goto out;
1071 __ipxitf_put(intrfc);
1072
1073 rc = 0;
1074out:
1075 spin_unlock_bh(&ipx_interfaces_lock);
1076 return rc;
1077}
1078
1079static struct ipx_interface *ipxitf_auto_create(struct net_device *dev,
1080 __be16 dlink_type)
1081{
1082 struct ipx_interface *intrfc = NULL;
1083 struct datalink_proto *datalink;
1084
1085 if (!dev)
1086 goto out;
1087
1088 /* Check addresses are suitable */
1089 if (dev->addr_len > IPX_NODE_LEN)
1090 goto out;
1091
1092 switch (ntohs(dlink_type)) {
1093 case ETH_P_IPX: datalink = pEII_datalink; break;
1094 case ETH_P_802_2: datalink = p8022_datalink; break;
1095 case ETH_P_SNAP: datalink = pSNAP_datalink; break;
1096 case ETH_P_802_3: datalink = p8023_datalink; break;
1097 default: goto out;
1098 }
1099
1100 intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0,
1101 dev->hard_header_len + datalink->header_length);
1102
1103 if (intrfc) {
1104 memset(intrfc->if_node, 0, IPX_NODE_LEN);
1105 memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]),
1106 dev->dev_addr, dev->addr_len);
1107 spin_lock_init(&intrfc->if_sklist_lock);
1108 atomic_set(&intrfc->refcnt, 1);
1109 ipxitf_insert(intrfc);
1110 dev_hold(dev);
1111 }
1112
1113out:
1114 return intrfc;
1115}
1116
1117static int ipxitf_ioctl(unsigned int cmd, void __user *arg)
1118{
1119 int rc = -EINVAL;
1120 struct ifreq ifr;
1121 int val;
1122
1123 switch (cmd) {
1124 case SIOCSIFADDR: {
1125 struct sockaddr_ipx *sipx;
1126 struct ipx_interface_definition f;
1127
1128 rc = -EFAULT;
1129 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1130 break;
1131 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1132 rc = -EINVAL;
1133 if (sipx->sipx_family != AF_IPX)
1134 break;
1135 f.ipx_network = sipx->sipx_network;
1136 memcpy(f.ipx_device, ifr.ifr_name,
1137 sizeof(f.ipx_device));
1138 memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN);
1139 f.ipx_dlink_type = sipx->sipx_type;
1140 f.ipx_special = sipx->sipx_special;
1141
1142 if (sipx->sipx_action == IPX_DLTITF)
1143 rc = ipxitf_delete(&f);
1144 else
1145 rc = ipxitf_create(&f);
1146 break;
1147 }
1148 case SIOCGIFADDR: {
1149 struct sockaddr_ipx *sipx;
1150 struct ipx_interface *ipxif;
1151 struct net_device *dev;
1152
1153 rc = -EFAULT;
1154 if (copy_from_user(&ifr, arg, sizeof(ifr)))
1155 break;
1156 sipx = (struct sockaddr_ipx *)&ifr.ifr_addr;
1157 dev = __dev_get_by_name(&init_net, ifr.ifr_name);
1158 rc = -ENODEV;
1159 if (!dev)
1160 break;
1161 ipxif = ipxitf_find_using_phys(dev,
1162 ipx_map_frame_type(sipx->sipx_type));
1163 rc = -EADDRNOTAVAIL;
1164 if (!ipxif)
1165 break;
1166
1167 sipx->sipx_family = AF_IPX;
1168 sipx->sipx_network = ipxif->if_netnum;
1169 memcpy(sipx->sipx_node, ipxif->if_node,
1170 sizeof(sipx->sipx_node));
1171 rc = -EFAULT;
1172 if (copy_to_user(arg, &ifr, sizeof(ifr)))
1173 break;
1174 ipxitf_put(ipxif);
1175 rc = 0;
1176 break;
1177 }
1178 case SIOCAIPXITFCRT:
1179 rc = -EFAULT;
1180 if (get_user(val, (unsigned char __user *) arg))
1181 break;
1182 rc = 0;
1183 ipxcfg_auto_create_interfaces = val;
1184 break;
1185 case SIOCAIPXPRISLT:
1186 rc = -EFAULT;
1187 if (get_user(val, (unsigned char __user *) arg))
1188 break;
1189 rc = 0;
1190 ipxcfg_set_auto_select(val);
1191 break;
1192 }
1193
1194 return rc;
1195}
1196
1197/*
1198 * Checksum routine for IPX
1199 */
1200
1201/* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1202/* This functions should *not* mess with packet contents */
1203
1204__be16 ipx_cksum(struct ipxhdr *packet, int length)
1205{
1206 /*
1207 * NOTE: sum is a net byte order quantity, which optimizes the
1208 * loop. This only works on big and little endian machines. (I
1209 * don't know of a machine that isn't.)
1210 */
1211 /* handle the first 3 words separately; checksum should be skipped
1212 * and ipx_tctrl masked out */
1213 __u16 *p = (__u16 *)packet;
1214 __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff));
1215 __u32 i = (length >> 1) - 3; /* Number of remaining complete words */
1216
1217 /* Loop through them */
1218 p += 3;
1219 while (i--)
1220 sum += *p++;
1221
1222 /* Add on the last part word if it exists */
1223 if (packet->ipx_pktsize & htons(1))
1224 sum += (__force u16)htons(0xff00) & *p;
1225
1226 /* Do final fixup */
1227 sum = (sum & 0xffff) + (sum >> 16);
1228
1229 /* It's a pity there's no concept of carry in C */
1230 if (sum >= 0x10000)
1231 sum++;
1232
1233 /*
1234 * Leave 0 alone; we don't want 0xffff here. Note that we can't get
1235 * here with 0x10000, so this check is the same as ((__u16)sum)
1236 */
1237 if (sum)
1238 sum = ~sum;
1239
1240 return (__force __be16)sum;
1241}
1242
1243const char *ipx_frame_name(__be16 frame)
1244{
1245 char* rc = "None";
1246
1247 switch (ntohs(frame)) {
1248 case ETH_P_IPX: rc = "EtherII"; break;
1249 case ETH_P_802_2: rc = "802.2"; break;
1250 case ETH_P_SNAP: rc = "SNAP"; break;
1251 case ETH_P_802_3: rc = "802.3"; break;
1252 }
1253
1254 return rc;
1255}
1256
1257const char *ipx_device_name(struct ipx_interface *intrfc)
1258{
1259 return intrfc->if_internal ? "Internal" :
1260 intrfc->if_dev ? intrfc->if_dev->name : "Unknown";
1261}
1262
1263/* Handling for system calls applied via the various interfaces to an IPX
1264 * socket object. */
1265
1266static int ipx_setsockopt(struct socket *sock, int level, int optname,
1267 char __user *optval, unsigned int optlen)
1268{
1269 struct sock *sk = sock->sk;
1270 int opt;
1271 int rc = -EINVAL;
1272
1273 lock_sock(sk);
1274 if (optlen != sizeof(int))
1275 goto out;
1276
1277 rc = -EFAULT;
1278 if (get_user(opt, (unsigned int __user *)optval))
1279 goto out;
1280
1281 rc = -ENOPROTOOPT;
1282 if (!(level == SOL_IPX && optname == IPX_TYPE))
1283 goto out;
1284
1285 ipx_sk(sk)->type = opt;
1286 rc = 0;
1287out:
1288 release_sock(sk);
1289 return rc;
1290}
1291
1292static int ipx_getsockopt(struct socket *sock, int level, int optname,
1293 char __user *optval, int __user *optlen)
1294{
1295 struct sock *sk = sock->sk;
1296 int val = 0;
1297 int len;
1298 int rc = -ENOPROTOOPT;
1299
1300 lock_sock(sk);
1301 if (!(level == SOL_IPX && optname == IPX_TYPE))
1302 goto out;
1303
1304 val = ipx_sk(sk)->type;
1305
1306 rc = -EFAULT;
1307 if (get_user(len, optlen))
1308 goto out;
1309
1310 len = min_t(unsigned int, len, sizeof(int));
1311 rc = -EINVAL;
1312 if(len < 0)
1313 goto out;
1314
1315 rc = -EFAULT;
1316 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1317 goto out;
1318
1319 rc = 0;
1320out:
1321 release_sock(sk);
1322 return rc;
1323}
1324
1325static struct proto ipx_proto = {
1326 .name = "IPX",
1327 .owner = THIS_MODULE,
1328 .obj_size = sizeof(struct ipx_sock),
1329};
1330
1331static int ipx_create(struct net *net, struct socket *sock, int protocol,
1332 int kern)
1333{
1334 int rc = -ESOCKTNOSUPPORT;
1335 struct sock *sk;
1336
1337 if (!net_eq(net, &init_net))
1338 return -EAFNOSUPPORT;
1339
1340 /*
1341 * SPX support is not anymore in the kernel sources. If you want to
1342 * ressurrect it, completing it and making it understand shared skbs,
1343 * be fully multithreaded, etc, grab the sources in an early 2.5 kernel
1344 * tree.
1345 */
1346 if (sock->type != SOCK_DGRAM)
1347 goto out;
1348
1349 rc = -ENOMEM;
1350 sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto, kern);
1351 if (!sk)
1352 goto out;
1353
1354 sk_refcnt_debug_inc(sk);
1355 sock_init_data(sock, sk);
1356 sk->sk_no_check_tx = 1; /* Checksum off by default */
1357 sock->ops = &ipx_dgram_ops;
1358 rc = 0;
1359out:
1360 return rc;
1361}
1362
1363static int ipx_release(struct socket *sock)
1364{
1365 struct sock *sk = sock->sk;
1366
1367 if (!sk)
1368 goto out;
1369
1370 lock_sock(sk);
1371 sk->sk_shutdown = SHUTDOWN_MASK;
1372 if (!sock_flag(sk, SOCK_DEAD))
1373 sk->sk_state_change(sk);
1374
1375 sock_set_flag(sk, SOCK_DEAD);
1376 sock->sk = NULL;
1377 sk_refcnt_debug_release(sk);
1378 ipx_destroy_socket(sk);
1379 release_sock(sk);
1380 sock_put(sk);
1381out:
1382 return 0;
1383}
1384
1385/* caller must hold a reference to intrfc */
1386
1387static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
1388{
1389 unsigned short socketNum = intrfc->if_sknum;
1390
1391 spin_lock_bh(&intrfc->if_sklist_lock);
1392
1393 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1394 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1395
1396 while (__ipxitf_find_socket(intrfc, htons(socketNum)))
1397 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1398 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1399 else
1400 socketNum++;
1401
1402 spin_unlock_bh(&intrfc->if_sklist_lock);
1403 intrfc->if_sknum = socketNum;
1404
1405 return htons(socketNum);
1406}
1407
1408static int __ipx_bind(struct socket *sock,
1409 struct sockaddr *uaddr, int addr_len)
1410{
1411 struct sock *sk = sock->sk;
1412 struct ipx_sock *ipxs = ipx_sk(sk);
1413 struct ipx_interface *intrfc;
1414 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1415 int rc = -EINVAL;
1416
1417 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1418 goto out;
1419
1420 intrfc = ipxitf_find_using_net(addr->sipx_network);
1421 rc = -EADDRNOTAVAIL;
1422 if (!intrfc)
1423 goto out;
1424
1425 if (!addr->sipx_port) {
1426 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1427 rc = -EINVAL;
1428 if (!addr->sipx_port)
1429 goto out_put;
1430 }
1431
1432 /* protect IPX system stuff like routing/sap */
1433 rc = -EACCES;
1434 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1435 !capable(CAP_NET_ADMIN))
1436 goto out_put;
1437
1438 ipxs->port = addr->sipx_port;
1439
1440#ifdef CONFIG_IPX_INTERN
1441 if (intrfc == ipx_internal_net) {
1442 /* The source address is to be set explicitly if the
1443 * socket is to be bound on the internal network. If a
1444 * node number 0 was specified, the default is used.
1445 */
1446
1447 rc = -EINVAL;
1448 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1449 goto out_put;
1450 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1451 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1452 else
1453 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1454
1455 rc = -EADDRINUSE;
1456 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1457 ipxs->port)) {
1458 SOCK_DEBUG(sk,
1459 "IPX: bind failed because port %X in use.\n",
1460 ntohs(addr->sipx_port));
1461 goto out_put;
1462 }
1463 } else {
1464 /* Source addresses are easy. It must be our
1465 * network:node pair for an interface routed to IPX
1466 * with the ipx routing ioctl()
1467 */
1468
1469 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1470
1471 rc = -EADDRINUSE;
1472 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1473 SOCK_DEBUG(sk,
1474 "IPX: bind failed because port %X in use.\n",
1475 ntohs(addr->sipx_port));
1476 goto out_put;
1477 }
1478 }
1479
1480#else /* !def CONFIG_IPX_INTERN */
1481
1482 /* Source addresses are easy. It must be our network:node pair for
1483 an interface routed to IPX with the ipx routing ioctl() */
1484
1485 rc = -EADDRINUSE;
1486 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1487 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1488 ntohs((int)addr->sipx_port));
1489 goto out_put;
1490 }
1491
1492#endif /* CONFIG_IPX_INTERN */
1493
1494 ipxitf_insert_socket(intrfc, sk);
1495 sock_reset_flag(sk, SOCK_ZAPPED);
1496
1497 rc = 0;
1498out_put:
1499 ipxitf_put(intrfc);
1500out:
1501 return rc;
1502}
1503
1504static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1505{
1506 struct sock *sk = sock->sk;
1507 int rc;
1508
1509 lock_sock(sk);
1510 rc = __ipx_bind(sock, uaddr, addr_len);
1511 release_sock(sk);
1512
1513 return rc;
1514}
1515
1516static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1517 int addr_len, int flags)
1518{
1519 struct sock *sk = sock->sk;
1520 struct ipx_sock *ipxs = ipx_sk(sk);
1521 struct sockaddr_ipx *addr;
1522 int rc = -EINVAL;
1523 struct ipx_route *rt;
1524
1525 sk->sk_state = TCP_CLOSE;
1526 sock->state = SS_UNCONNECTED;
1527
1528 lock_sock(sk);
1529 if (addr_len != sizeof(*addr))
1530 goto out;
1531 addr = (struct sockaddr_ipx *)uaddr;
1532
1533 /* put the autobinding in */
1534 if (!ipxs->port) {
1535 struct sockaddr_ipx uaddr;
1536
1537 uaddr.sipx_port = 0;
1538 uaddr.sipx_network = 0;
1539
1540#ifdef CONFIG_IPX_INTERN
1541 rc = -ENETDOWN;
1542 if (!ipxs->intrfc)
1543 goto out; /* Someone zonked the iface */
1544 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1545 IPX_NODE_LEN);
1546#endif /* CONFIG_IPX_INTERN */
1547
1548 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1549 sizeof(struct sockaddr_ipx));
1550 if (rc)
1551 goto out;
1552 }
1553
1554 /* We can either connect to primary network or somewhere
1555 * we can route to */
1556 rt = ipxrtr_lookup(addr->sipx_network);
1557 rc = -ENETUNREACH;
1558 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1559 goto out;
1560
1561 ipxs->dest_addr.net = addr->sipx_network;
1562 ipxs->dest_addr.sock = addr->sipx_port;
1563 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1564 ipxs->type = addr->sipx_type;
1565
1566 if (sock->type == SOCK_DGRAM) {
1567 sock->state = SS_CONNECTED;
1568 sk->sk_state = TCP_ESTABLISHED;
1569 }
1570
1571 if (rt)
1572 ipxrtr_put(rt);
1573 rc = 0;
1574out:
1575 release_sock(sk);
1576 return rc;
1577}
1578
1579
1580static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1581 int *uaddr_len, int peer)
1582{
1583 struct ipx_address *addr;
1584 struct sockaddr_ipx sipx;
1585 struct sock *sk = sock->sk;
1586 struct ipx_sock *ipxs = ipx_sk(sk);
1587 int rc;
1588
1589 *uaddr_len = sizeof(struct sockaddr_ipx);
1590
1591 lock_sock(sk);
1592 if (peer) {
1593 rc = -ENOTCONN;
1594 if (sk->sk_state != TCP_ESTABLISHED)
1595 goto out;
1596
1597 addr = &ipxs->dest_addr;
1598 sipx.sipx_network = addr->net;
1599 sipx.sipx_port = addr->sock;
1600 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1601 } else {
1602 if (ipxs->intrfc) {
1603 sipx.sipx_network = ipxs->intrfc->if_netnum;
1604#ifdef CONFIG_IPX_INTERN
1605 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1606#else
1607 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1608 IPX_NODE_LEN);
1609#endif /* CONFIG_IPX_INTERN */
1610
1611 } else {
1612 sipx.sipx_network = 0;
1613 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1614 }
1615
1616 sipx.sipx_port = ipxs->port;
1617 }
1618
1619 sipx.sipx_family = AF_IPX;
1620 sipx.sipx_type = ipxs->type;
1621 sipx.sipx_zero = 0;
1622 memcpy(uaddr, &sipx, sizeof(sipx));
1623
1624 rc = 0;
1625out:
1626 release_sock(sk);
1627 return rc;
1628}
1629
1630static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
1631{
1632 /* NULL here for pt means the packet was looped back */
1633 struct ipx_interface *intrfc;
1634 struct ipxhdr *ipx;
1635 u16 ipx_pktsize;
1636 int rc = 0;
1637
1638 if (!net_eq(dev_net(dev), &init_net))
1639 goto drop;
1640
1641 /* Not ours */
1642 if (skb->pkt_type == PACKET_OTHERHOST)
1643 goto drop;
1644
1645 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1646 goto out;
1647
1648 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1649 goto drop;
1650
1651 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
1652
1653 /* Too small or invalid header? */
1654 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1655 !pskb_may_pull(skb, ipx_pktsize))
1656 goto drop;
1657
1658 ipx = ipx_hdr(skb);
1659 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1660 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1661 goto drop;
1662
1663 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1664 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1665 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1666
1667 /* Determine what local ipx endpoint this is */
1668 intrfc = ipxitf_find_using_phys(dev, pt->type);
1669 if (!intrfc) {
1670 if (ipxcfg_auto_create_interfaces &&
1671 IPX_SKB_CB(skb)->ipx_dest_net) {
1672 intrfc = ipxitf_auto_create(dev, pt->type);
1673 if (intrfc)
1674 ipxitf_hold(intrfc);
1675 }
1676
1677 if (!intrfc) /* Not one of ours */
1678 /* or invalid packet for auto creation */
1679 goto drop;
1680 }
1681
1682 rc = ipxitf_rcv(intrfc, skb);
1683 ipxitf_put(intrfc);
1684 goto out;
1685drop:
1686 kfree_skb(skb);
1687out:
1688 return rc;
1689}
1690
1691static int ipx_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1692{
1693 struct sock *sk = sock->sk;
1694 struct ipx_sock *ipxs = ipx_sk(sk);
1695 DECLARE_SOCKADDR(struct sockaddr_ipx *, usipx, msg->msg_name);
1696 struct sockaddr_ipx local_sipx;
1697 int rc = -EINVAL;
1698 int flags = msg->msg_flags;
1699
1700 lock_sock(sk);
1701 /* Socket gets bound below anyway */
1702/* if (sk->sk_zapped)
1703 return -EIO; */ /* Socket not bound */
1704 if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1705 goto out;
1706
1707 /* Max possible packet size limited by 16 bit pktsize in header */
1708 if (len >= 65535 - sizeof(struct ipxhdr))
1709 goto out;
1710
1711 if (usipx) {
1712 if (!ipxs->port) {
1713 struct sockaddr_ipx uaddr;
1714
1715 uaddr.sipx_port = 0;
1716 uaddr.sipx_network = 0;
1717#ifdef CONFIG_IPX_INTERN
1718 rc = -ENETDOWN;
1719 if (!ipxs->intrfc)
1720 goto out; /* Someone zonked the iface */
1721 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1722 IPX_NODE_LEN);
1723#endif
1724 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1725 sizeof(struct sockaddr_ipx));
1726 if (rc)
1727 goto out;
1728 }
1729
1730 rc = -EINVAL;
1731 if (msg->msg_namelen < sizeof(*usipx) ||
1732 usipx->sipx_family != AF_IPX)
1733 goto out;
1734 } else {
1735 rc = -ENOTCONN;
1736 if (sk->sk_state != TCP_ESTABLISHED)
1737 goto out;
1738
1739 usipx = &local_sipx;
1740 usipx->sipx_family = AF_IPX;
1741 usipx->sipx_type = ipxs->type;
1742 usipx->sipx_port = ipxs->dest_addr.sock;
1743 usipx->sipx_network = ipxs->dest_addr.net;
1744 memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN);
1745 }
1746
1747 rc = ipxrtr_route_packet(sk, usipx, msg, len, flags & MSG_DONTWAIT);
1748 if (rc >= 0)
1749 rc = len;
1750out:
1751 release_sock(sk);
1752 return rc;
1753}
1754
1755
1756static int ipx_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1757 int flags)
1758{
1759 struct sock *sk = sock->sk;
1760 struct ipx_sock *ipxs = ipx_sk(sk);
1761 DECLARE_SOCKADDR(struct sockaddr_ipx *, sipx, msg->msg_name);
1762 struct ipxhdr *ipx = NULL;
1763 struct sk_buff *skb;
1764 int copied, rc;
1765 bool locked = true;
1766
1767 lock_sock(sk);
1768 /* put the autobinding in */
1769 if (!ipxs->port) {
1770 struct sockaddr_ipx uaddr;
1771
1772 uaddr.sipx_port = 0;
1773 uaddr.sipx_network = 0;
1774
1775#ifdef CONFIG_IPX_INTERN
1776 rc = -ENETDOWN;
1777 if (!ipxs->intrfc)
1778 goto out; /* Someone zonked the iface */
1779 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN);
1780#endif /* CONFIG_IPX_INTERN */
1781
1782 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
1783 sizeof(struct sockaddr_ipx));
1784 if (rc)
1785 goto out;
1786 }
1787
1788 rc = -ENOTCONN;
1789 if (sock_flag(sk, SOCK_ZAPPED))
1790 goto out;
1791
1792 release_sock(sk);
1793 locked = false;
1794 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1795 flags & MSG_DONTWAIT, &rc);
1796 if (!skb) {
1797 if (rc == -EAGAIN && (sk->sk_shutdown & RCV_SHUTDOWN))
1798 rc = 0;
1799 goto out;
1800 }
1801
1802 ipx = ipx_hdr(skb);
1803 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1804 if (copied > size) {
1805 copied = size;
1806 msg->msg_flags |= MSG_TRUNC;
1807 }
1808
1809 rc = skb_copy_datagram_msg(skb, sizeof(struct ipxhdr), msg, copied);
1810 if (rc)
1811 goto out_free;
1812 if (skb->tstamp.tv64)
1813 sk->sk_stamp = skb->tstamp;
1814
1815 if (sipx) {
1816 sipx->sipx_family = AF_IPX;
1817 sipx->sipx_port = ipx->ipx_source.sock;
1818 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1819 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1820 sipx->sipx_type = ipx->ipx_type;
1821 sipx->sipx_zero = 0;
1822 msg->msg_namelen = sizeof(*sipx);
1823 }
1824 rc = copied;
1825
1826out_free:
1827 skb_free_datagram(sk, skb);
1828out:
1829 if (locked)
1830 release_sock(sk);
1831 return rc;
1832}
1833
1834
1835static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1836{
1837 int rc = 0;
1838 long amount = 0;
1839 struct sock *sk = sock->sk;
1840 void __user *argp = (void __user *)arg;
1841
1842 lock_sock(sk);
1843 switch (cmd) {
1844 case TIOCOUTQ:
1845 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1846 if (amount < 0)
1847 amount = 0;
1848 rc = put_user(amount, (int __user *)argp);
1849 break;
1850 case TIOCINQ: {
1851 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1852 /* These two are safe on a single CPU system as only
1853 * user tasks fiddle here */
1854 if (skb)
1855 amount = skb->len - sizeof(struct ipxhdr);
1856 rc = put_user(amount, (int __user *)argp);
1857 break;
1858 }
1859 case SIOCADDRT:
1860 case SIOCDELRT:
1861 rc = -EPERM;
1862 if (capable(CAP_NET_ADMIN))
1863 rc = ipxrtr_ioctl(cmd, argp);
1864 break;
1865 case SIOCSIFADDR:
1866 case SIOCAIPXITFCRT:
1867 case SIOCAIPXPRISLT:
1868 rc = -EPERM;
1869 if (!capable(CAP_NET_ADMIN))
1870 break;
1871 case SIOCGIFADDR:
1872 rc = ipxitf_ioctl(cmd, argp);
1873 break;
1874 case SIOCIPXCFGDATA:
1875 rc = ipxcfg_get_config_data(argp);
1876 break;
1877 case SIOCIPXNCPCONN:
1878 /*
1879 * This socket wants to take care of the NCP connection
1880 * handed to us in arg.
1881 */
1882 rc = -EPERM;
1883 if (!capable(CAP_NET_ADMIN))
1884 break;
1885 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1886 (const unsigned short __user *)argp);
1887 break;
1888 case SIOCGSTAMP:
1889 rc = sock_get_timestamp(sk, argp);
1890 break;
1891 case SIOCGIFDSTADDR:
1892 case SIOCSIFDSTADDR:
1893 case SIOCGIFBRDADDR:
1894 case SIOCSIFBRDADDR:
1895 case SIOCGIFNETMASK:
1896 case SIOCSIFNETMASK:
1897 rc = -EINVAL;
1898 break;
1899 default:
1900 rc = -ENOIOCTLCMD;
1901 break;
1902 }
1903 release_sock(sk);
1904
1905 return rc;
1906}
1907
1908
1909#ifdef CONFIG_COMPAT
1910static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1911{
1912 /*
1913 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1914 * commands is handled by generic ioctl code. As these commands are
1915 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1916 * code.
1917 */
1918 switch (cmd) {
1919 case SIOCAIPXITFCRT:
1920 case SIOCAIPXPRISLT:
1921 case SIOCIPXCFGDATA:
1922 case SIOCIPXNCPCONN:
1923 return ipx_ioctl(sock, cmd, arg);
1924 default:
1925 return -ENOIOCTLCMD;
1926 }
1927}
1928#endif
1929
1930static int ipx_shutdown(struct socket *sock, int mode)
1931{
1932 struct sock *sk = sock->sk;
1933
1934 if (mode < SHUT_RD || mode > SHUT_RDWR)
1935 return -EINVAL;
1936 /* This maps:
1937 * SHUT_RD (0) -> RCV_SHUTDOWN (1)
1938 * SHUT_WR (1) -> SEND_SHUTDOWN (2)
1939 * SHUT_RDWR (2) -> SHUTDOWN_MASK (3)
1940 */
1941 ++mode;
1942
1943 lock_sock(sk);
1944 sk->sk_shutdown |= mode;
1945 release_sock(sk);
1946 sk->sk_state_change(sk);
1947
1948 return 0;
1949}
1950
1951/*
1952 * Socket family declarations
1953 */
1954
1955static const struct net_proto_family ipx_family_ops = {
1956 .family = PF_IPX,
1957 .create = ipx_create,
1958 .owner = THIS_MODULE,
1959};
1960
1961static const struct proto_ops ipx_dgram_ops = {
1962 .family = PF_IPX,
1963 .owner = THIS_MODULE,
1964 .release = ipx_release,
1965 .bind = ipx_bind,
1966 .connect = ipx_connect,
1967 .socketpair = sock_no_socketpair,
1968 .accept = sock_no_accept,
1969 .getname = ipx_getname,
1970 .poll = datagram_poll,
1971 .ioctl = ipx_ioctl,
1972#ifdef CONFIG_COMPAT
1973 .compat_ioctl = ipx_compat_ioctl,
1974#endif
1975 .listen = sock_no_listen,
1976 .shutdown = ipx_shutdown,
1977 .setsockopt = ipx_setsockopt,
1978 .getsockopt = ipx_getsockopt,
1979 .sendmsg = ipx_sendmsg,
1980 .recvmsg = ipx_recvmsg,
1981 .mmap = sock_no_mmap,
1982 .sendpage = sock_no_sendpage,
1983};
1984
1985static struct packet_type ipx_8023_packet_type __read_mostly = {
1986 .type = cpu_to_be16(ETH_P_802_3),
1987 .func = ipx_rcv,
1988};
1989
1990static struct packet_type ipx_dix_packet_type __read_mostly = {
1991 .type = cpu_to_be16(ETH_P_IPX),
1992 .func = ipx_rcv,
1993};
1994
1995static struct notifier_block ipx_dev_notifier = {
1996 .notifier_call = ipxitf_device_event,
1997};
1998
1999static const unsigned char ipx_8022_type = 0xE0;
2000static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
2001static const char ipx_EII_err_msg[] __initconst =
2002 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
2003static const char ipx_8023_err_msg[] __initconst =
2004 KERN_CRIT "IPX: Unable to register with 802.3\n";
2005static const char ipx_llc_err_msg[] __initconst =
2006 KERN_CRIT "IPX: Unable to register with 802.2\n";
2007static const char ipx_snap_err_msg[] __initconst =
2008 KERN_CRIT "IPX: Unable to register with SNAP\n";
2009
2010static int __init ipx_init(void)
2011{
2012 int rc = proto_register(&ipx_proto, 1);
2013
2014 if (rc != 0)
2015 goto out;
2016
2017 sock_register(&ipx_family_ops);
2018
2019 pEII_datalink = make_EII_client();
2020 if (pEII_datalink)
2021 dev_add_pack(&ipx_dix_packet_type);
2022 else
2023 printk(ipx_EII_err_msg);
2024
2025 p8023_datalink = make_8023_client();
2026 if (p8023_datalink)
2027 dev_add_pack(&ipx_8023_packet_type);
2028 else
2029 printk(ipx_8023_err_msg);
2030
2031 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2032 if (!p8022_datalink)
2033 printk(ipx_llc_err_msg);
2034
2035 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2036 if (!pSNAP_datalink)
2037 printk(ipx_snap_err_msg);
2038
2039 register_netdevice_notifier(&ipx_dev_notifier);
2040 ipx_register_sysctl();
2041 ipx_proc_init();
2042out:
2043 return rc;
2044}
2045
2046static void __exit ipx_proto_finito(void)
2047{
2048 ipx_proc_exit();
2049 ipx_unregister_sysctl();
2050
2051 unregister_netdevice_notifier(&ipx_dev_notifier);
2052
2053 ipxitf_cleanup();
2054
2055 if (pSNAP_datalink) {
2056 unregister_snap_client(pSNAP_datalink);
2057 pSNAP_datalink = NULL;
2058 }
2059
2060 if (p8022_datalink) {
2061 unregister_8022_client(p8022_datalink);
2062 p8022_datalink = NULL;
2063 }
2064
2065 dev_remove_pack(&ipx_8023_packet_type);
2066 if (p8023_datalink) {
2067 destroy_8023_client(p8023_datalink);
2068 p8023_datalink = NULL;
2069 }
2070
2071 dev_remove_pack(&ipx_dix_packet_type);
2072 if (pEII_datalink) {
2073 destroy_EII_client(pEII_datalink);
2074 pEII_datalink = NULL;
2075 }
2076
2077 proto_unregister(&ipx_proto);
2078 sock_unregister(ipx_family_ops.family);
2079}
2080
2081module_init(ipx_init);
2082module_exit(ipx_proto_finito);
2083MODULE_LICENSE("GPL");
2084MODULE_ALIAS_NETPROTO(PF_IPX);