blob: 00b2a6d1c0092a7d0ec668b0b657f520637f31cd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +090014 * Neither Alan Cox nor the Swansea University Computer Society admit
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 * 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
Randy Dunlap4fc268d2006-01-11 12:17:47 -080031#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090043#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/skbuff.h>
45#include <linux/socket.h>
46#include <linux/sockios.h>
47#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#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>
Rashika Kheria7780d8a2014-02-09 22:27:41 +053055#include <net/datalink.h>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070056#include <net/tcp_states.h>
Rashika Kheria535d3ae2014-02-09 22:29:14 +053057#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59#include <asm/uaccess.h>
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061/* 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
Eric Dumazet90ddc4f2005-12-22 12:49:22 -080073static const struct proto_ops ipx_dgram_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75LIST_HEAD(ipx_interfaces);
76DEFINE_SPINLOCK(ipx_interfaces_lock);
77
78struct ipx_interface *ipx_primary_net;
79struct ipx_interface *ipx_internal_net;
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081struct 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);
Pavel Emelyanovc2b42332007-11-10 21:39:26 -0800135 sk_refcnt_debug_dec(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900138/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 * 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,
Al Viro4833ed02006-11-03 00:27:06 -0800153 __be16 datalink)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154{
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,
Al Viro4833ed02006-11-03 00:27:06 -0800166 __be16 datalink)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
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
Al Viro4833ed02006-11-03 00:27:06 -0800178struct ipx_interface *ipxitf_find_using_net(__be32 net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179{
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,
Al Viro4833ed02006-11-03 00:27:06 -0800213 __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
215 struct sock *s;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
Sasha Levinb67bfe02013-02-27 17:06:00 -0800217 sk_for_each(s, &intrfc->if_sklist)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 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,
Al Viro4833ed02006-11-03 00:27:06 -0800227 __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
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,
Al Viro4833ed02006-11-03 00:27:06 -0800243 __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244{
245 struct sock *s;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 ipxitf_hold(intrfc);
248 spin_lock_bh(&intrfc->if_sklist_lock);
249
Sasha Levinb67bfe02013-02-27 17:06:00 -0800250 sk_for_each(s, &intrfc->if_sklist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 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;
Sasha Levinb67bfe02013-02-27 17:06:00 -0800268 struct hlist_node *t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
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 */
Sasha Levinb67bfe02013-02-27 17:06:00 -0800275 sk_for_each_safe(s, t, &intrfc->if_sklist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 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 __inline__ 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{
Jiri Pirko351638e2013-05-28 01:30:21 +0000318 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 struct ipx_interface *i, *tmp;
320
YOSHIFUJI Hideaki721499e2008-07-19 22:34:43 -0700321 if (!net_eq(dev_net(dev), &init_net))
Eric W. Biedermane9dc8652007-09-12 13:02:17 +0200322 return NOTIFY_DONE;
323
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 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);
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900346 list_for_each_entry_safe(i, tmp, &ipx_interfaces, node)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 __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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 int rc;
372
373 spin_lock_bh(&intrfc->if_sklist_lock);
374
Sasha Levinb67bfe02013-02-27 17:06:00 -0800375 sk_for_each(s, &intrfc->if_sklist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 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;
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900422 int connection = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 u8 *ncphdr = (u8 *)(ipx + 1);
424
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900425 if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 /* 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);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800435 sk_for_each(sk, &intrfc->if_sklist)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 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);
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900457 if (!sock1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 /* 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);
Arnaldo Carvalho de Melo7e28ecc2007-03-10 18:40:59 -0300551 skb_reset_network_header(skb2);
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -0300552 skb_reset_transport_header(skb2);
Arnaldo Carvalho de Melo7e28ecc2007-03-10 18:40:59 -0300553 skb_put(skb2, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 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) {
Al Viro4833ed02006-11-03 00:27:06 -0800577 __be32 *last_hop = (__be32 *)(((u8 *) skb->data) +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 sizeof(struct ipxhdr) +
579 IPX_SKB_CB(skb)->last_hop.index *
Al Viro4833ed02006-11-03 00:27:06 -0800580 sizeof(__be32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 *last_hop = IPX_SKB_CB(skb)->last_hop.netnum;
582 IPX_SKB_CB(skb)->last_hop.index = -1;
583 }
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900584
585 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 * We need to know how many skbuffs it will take to send out this
587 * packet to avoid unnecessary copies.
588 */
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900589
590 if (!dl || !dev || dev->flags & IFF_LOOPBACK)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 send_to_wire = 0; /* No non looped */
592
593 /*
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900594 * See if this should be demuxed to sockets on this interface
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 *
596 * We want to ensure the original was eaten or that we only use
597 * up clones.
598 */
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 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 */
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900686 ipxitf_discover_netnum(intrfc, skb);
687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 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)
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900733{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 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",
Al Viro4833ed02006-11-03 00:27:06 -0800749 (unsigned long) ntohl(cb->ipx_source_net),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 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.
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900770 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 * 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;
Al Viro4833ed02006-11-03 00:27:06 -0800789 __be32 *l;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
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) +
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900797 IPX_MAX_PPROP_HOPS * sizeof(u32))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 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;
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 c = ((u8 *) ipx) + sizeof(struct ipxhdr);
Al Viro4833ed02006-11-03 00:27:06 -0800810 l = (__be32 *) c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
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;
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +0900828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 /* That aren't in the list */
830 if (ifcs == intrfc)
831 continue;
Al Viro4833ed02006-11-03 00:27:06 -0800832 l = (__be32 *) c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 /* 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
Al Viro4833ed02006-11-03 00:27:06 -0800862static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum,
863 __be16 dlink_type,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 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
Alexey Dobriyan4ac396c2006-05-16 15:17:49 -0700920static __be16 ipx_map_frame_type(unsigned char type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921{
Alexey Dobriyan4ac396c2006-05-16 15:17:49 -0700922 __be16 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
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;
Al Viro4833ed02006-11-03 00:27:06 -0800937 __be16 dlink_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 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
Eric W. Biederman881d9662007-09-17 11:56:21 -0700961 dev = dev_get_by_name(&init_net, idef->ipx_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 rc = -ENODEV;
963 if (!dev)
964 goto out;
965
966 switch (idef->ipx_dlink_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 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;
Paul Gortmaker211ed862012-05-10 17:14:35 -0400976 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 /* 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;
Al Viro4833ed02006-11-03 00:27:06 -08001043 __be16 dlink_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 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
Eric W. Biederman881d9662007-09-17 11:56:21 -07001062 dev = __dev_get_by_name(&init_net, idef->ipx_device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 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,
Al Viro4833ed02006-11-03 00:27:06 -08001080 __be16 dlink_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081{
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
Al Viro4833ed02006-11-03 00:27:06 -08001092 switch (ntohs(dlink_type)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 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;
Eric W. Biederman881d9662007-09-17 11:56:21 -07001157 dev = __dev_get_by_name(&init_net, ifr.ifr_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 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 }
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001178 case SIOCAIPXITFCRT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 rc = -EFAULT;
1180 if (get_user(val, (unsigned char __user *) arg))
1181 break;
1182 rc = 0;
1183 ipxcfg_auto_create_interfaces = val;
1184 break;
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001185 case SIOCAIPXPRISLT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186 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 */
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001200
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201/* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */
1202/* This functions should *not* mess with packet contents */
1203
Al Viro02e60372006-11-03 00:28:23 -08001204__be16 ipx_cksum(struct ipxhdr *packet, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205{
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001206 /*
1207 * NOTE: sum is a net byte order quantity, which optimizes the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 * loop. This only works on big and little endian machines. (I
1209 * don't know of a machine that isn't.)
1210 */
Al Viro02e60372006-11-03 00:28:23 -08001211 /* 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216
Al Viro02e60372006-11-03 00:28:23 -08001217 /* Loop through them */
1218 p += 3;
1219 while (i--)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 sum += *p++;
1221
1222 /* Add on the last part word if it exists */
1223 if (packet->ipx_pktsize & htons(1))
Al Viro02e60372006-11-03 00:28:23 -08001224 sum += (__force u16)htons(0xff00) & *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
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
Al Viro02e60372006-11-03 00:28:23 -08001233 /*
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241}
1242
Al Viro4833ed02006-11-03 00:27:06 -08001243const char *ipx_frame_name(__be16 frame)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244{
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 }
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,
David S. Millerb7058842009-09-30 16:12:20 -07001267 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268{
1269 struct sock *sk = sock->sk;
1270 int opt;
1271 int rc = -EINVAL;
1272
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001273 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 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:
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001288 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 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
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001300 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 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;
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 rc = -EFAULT;
1316 if (put_user(len, optlen) || copy_to_user(optval, &val, len))
1317 goto out;
1318
1319 rc = 0;
1320out:
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001321 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322 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
Eric Paris3f378b62009-11-05 22:18:14 -08001331static int ipx_create(struct net *net, struct socket *sock, int protocol,
1332 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333{
1334 int rc = -ESOCKTNOSUPPORT;
1335 struct sock *sk;
1336
Octavian Purdila09ad9bc2009-11-25 15:14:13 -08001337 if (!net_eq(net, &init_net))
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -07001338 return -EAFNOSUPPORT;
1339
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 /*
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
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001349 rc = -ENOMEM;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -07001350 sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 if (!sk)
1352 goto out;
Pavel Emelyanovc2b42332007-11-10 21:39:26 -08001353
1354 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 sock_init_data(sock, sk);
1356 sk->sk_no_check = 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
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001370 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 if (!sock_flag(sk, SOCK_DEAD))
1372 sk->sk_state_change(sk);
1373
1374 sock_set_flag(sk, SOCK_DEAD);
1375 sock->sk = NULL;
Pavel Emelyanovc2b42332007-11-10 21:39:26 -08001376 sk_refcnt_debug_release(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 ipx_destroy_socket(sk);
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001378 release_sock(sk);
Eric Dumazet674f2112011-03-21 18:16:39 -07001379 sock_put(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380out:
1381 return 0;
1382}
1383
1384/* caller must hold a reference to intrfc */
1385
Al Viro4833ed02006-11-03 00:27:06 -08001386static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387{
1388 unsigned short socketNum = intrfc->if_sknum;
1389
1390 spin_lock_bh(&intrfc->if_sklist_lock);
1391
1392 if (socketNum < IPX_MIN_EPHEMERAL_SOCKET)
1393 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1394
Al Viro4833ed02006-11-03 00:27:06 -08001395 while (__ipxitf_find_socket(intrfc, htons(socketNum)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 if (socketNum > IPX_MAX_EPHEMERAL_SOCKET)
1397 socketNum = IPX_MIN_EPHEMERAL_SOCKET;
1398 else
1399 socketNum++;
1400
1401 spin_unlock_bh(&intrfc->if_sklist_lock);
1402 intrfc->if_sknum = socketNum;
1403
Al Viro4833ed02006-11-03 00:27:06 -08001404 return htons(socketNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405}
1406
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001407static int __ipx_bind(struct socket *sock,
1408 struct sockaddr *uaddr, int addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409{
1410 struct sock *sk = sock->sk;
1411 struct ipx_sock *ipxs = ipx_sk(sk);
1412 struct ipx_interface *intrfc;
1413 struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr;
1414 int rc = -EINVAL;
1415
1416 if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx))
1417 goto out;
1418
1419 intrfc = ipxitf_find_using_net(addr->sipx_network);
1420 rc = -EADDRNOTAVAIL;
1421 if (!intrfc)
1422 goto out;
1423
1424 if (!addr->sipx_port) {
1425 addr->sipx_port = ipx_first_free_socketnum(intrfc);
1426 rc = -EINVAL;
1427 if (!addr->sipx_port)
1428 goto out_put;
1429 }
1430
1431 /* protect IPX system stuff like routing/sap */
1432 rc = -EACCES;
1433 if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET &&
1434 !capable(CAP_NET_ADMIN))
1435 goto out_put;
1436
1437 ipxs->port = addr->sipx_port;
1438
1439#ifdef CONFIG_IPX_INTERN
1440 if (intrfc == ipx_internal_net) {
1441 /* The source address is to be set explicitly if the
1442 * socket is to be bound on the internal network. If a
1443 * node number 0 was specified, the default is used.
1444 */
1445
1446 rc = -EINVAL;
1447 if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN))
1448 goto out_put;
1449 if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN))
1450 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1451 else
1452 memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN);
1453
1454 rc = -EADDRINUSE;
1455 if (ipxitf_find_internal_socket(intrfc, ipxs->node,
1456 ipxs->port)) {
1457 SOCK_DEBUG(sk,
1458 "IPX: bind failed because port %X in use.\n",
Al Viro4833ed02006-11-03 00:27:06 -08001459 ntohs(addr->sipx_port));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 goto out_put;
1461 }
1462 } else {
1463 /* Source addresses are easy. It must be our
1464 * network:node pair for an interface routed to IPX
1465 * with the ipx routing ioctl()
1466 */
1467
1468 memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN);
1469
1470 rc = -EADDRINUSE;
1471 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1472 SOCK_DEBUG(sk,
1473 "IPX: bind failed because port %X in use.\n",
Al Viro4833ed02006-11-03 00:27:06 -08001474 ntohs(addr->sipx_port));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 goto out_put;
1476 }
1477 }
1478
1479#else /* !def CONFIG_IPX_INTERN */
1480
1481 /* Source addresses are easy. It must be our network:node pair for
1482 an interface routed to IPX with the ipx routing ioctl() */
1483
1484 rc = -EADDRINUSE;
1485 if (ipxitf_find_socket(intrfc, addr->sipx_port)) {
1486 SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n",
1487 ntohs((int)addr->sipx_port));
1488 goto out_put;
1489 }
1490
1491#endif /* CONFIG_IPX_INTERN */
1492
1493 ipxitf_insert_socket(intrfc, sk);
1494 sock_reset_flag(sk, SOCK_ZAPPED);
1495
1496 rc = 0;
1497out_put:
1498 ipxitf_put(intrfc);
1499out:
1500 return rc;
1501}
1502
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001503static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1504{
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001505 struct sock *sk = sock->sk;
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001506 int rc;
1507
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001508 lock_sock(sk);
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001509 rc = __ipx_bind(sock, uaddr, addr_len);
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001510 release_sock(sk);
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001511
1512 return rc;
1513}
1514
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515static int ipx_connect(struct socket *sock, struct sockaddr *uaddr,
1516 int addr_len, int flags)
1517{
1518 struct sock *sk = sock->sk;
1519 struct ipx_sock *ipxs = ipx_sk(sk);
1520 struct sockaddr_ipx *addr;
1521 int rc = -EINVAL;
1522 struct ipx_route *rt;
1523
1524 sk->sk_state = TCP_CLOSE;
1525 sock->state = SS_UNCONNECTED;
1526
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001527 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 if (addr_len != sizeof(*addr))
1529 goto out;
1530 addr = (struct sockaddr_ipx *)uaddr;
1531
1532 /* put the autobinding in */
1533 if (!ipxs->port) {
1534 struct sockaddr_ipx uaddr;
1535
1536 uaddr.sipx_port = 0;
1537 uaddr.sipx_network = 0;
1538
1539#ifdef CONFIG_IPX_INTERN
1540 rc = -ENETDOWN;
1541 if (!ipxs->intrfc)
1542 goto out; /* Someone zonked the iface */
1543 memcpy(uaddr.sipx_node, ipxs->intrfc->if_node,
1544 IPX_NODE_LEN);
1545#endif /* CONFIG_IPX_INTERN */
1546
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001547 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 sizeof(struct sockaddr_ipx));
1549 if (rc)
1550 goto out;
1551 }
1552
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001553 /* We can either connect to primary network or somewhere
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 * we can route to */
1555 rt = ipxrtr_lookup(addr->sipx_network);
1556 rc = -ENETUNREACH;
1557 if (!rt && !(!addr->sipx_network && ipx_primary_net))
1558 goto out;
1559
1560 ipxs->dest_addr.net = addr->sipx_network;
1561 ipxs->dest_addr.sock = addr->sipx_port;
1562 memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN);
1563 ipxs->type = addr->sipx_type;
1564
1565 if (sock->type == SOCK_DGRAM) {
1566 sock->state = SS_CONNECTED;
1567 sk->sk_state = TCP_ESTABLISHED;
1568 }
1569
1570 if (rt)
1571 ipxrtr_put(rt);
1572 rc = 0;
1573out:
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001574 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 return rc;
1576}
1577
1578
1579static int ipx_getname(struct socket *sock, struct sockaddr *uaddr,
1580 int *uaddr_len, int peer)
1581{
1582 struct ipx_address *addr;
1583 struct sockaddr_ipx sipx;
1584 struct sock *sk = sock->sk;
1585 struct ipx_sock *ipxs = ipx_sk(sk);
1586 int rc;
1587
1588 *uaddr_len = sizeof(struct sockaddr_ipx);
1589
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001590 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 if (peer) {
1592 rc = -ENOTCONN;
1593 if (sk->sk_state != TCP_ESTABLISHED)
1594 goto out;
1595
1596 addr = &ipxs->dest_addr;
1597 sipx.sipx_network = addr->net;
1598 sipx.sipx_port = addr->sock;
1599 memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN);
1600 } else {
1601 if (ipxs->intrfc) {
1602 sipx.sipx_network = ipxs->intrfc->if_netnum;
1603#ifdef CONFIG_IPX_INTERN
1604 memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN);
1605#else
1606 memcpy(sipx.sipx_node, ipxs->intrfc->if_node,
1607 IPX_NODE_LEN);
1608#endif /* CONFIG_IPX_INTERN */
1609
1610 } else {
1611 sipx.sipx_network = 0;
1612 memset(sipx.sipx_node, '\0', IPX_NODE_LEN);
1613 }
1614
1615 sipx.sipx_port = ipxs->port;
1616 }
1617
1618 sipx.sipx_family = AF_IPX;
1619 sipx.sipx_type = ipxs->type;
1620 sipx.sipx_zero = 0;
1621 memcpy(uaddr, &sipx, sizeof(sipx));
1622
1623 rc = 0;
1624out:
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001625 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 return rc;
1627}
1628
David S. Millerf2ccd8f2005-08-09 19:34:12 -07001629static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630{
1631 /* NULL here for pt means the packet was looped back */
1632 struct ipx_interface *intrfc;
1633 struct ipxhdr *ipx;
1634 u16 ipx_pktsize;
1635 int rc = 0;
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001636
YOSHIFUJI Hideaki721499e2008-07-19 22:34:43 -07001637 if (!net_eq(dev_net(dev), &init_net))
Eric W. Biedermane730c152007-09-17 11:53:39 -07001638 goto drop;
1639
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001640 /* Not ours */
1641 if (skb->pkt_type == PACKET_OTHERHOST)
1642 goto drop;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643
1644 if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
1645 goto out;
1646
Stephen Hemminger7b1ba8d2006-08-08 16:48:51 -07001647 if (!pskb_may_pull(skb, sizeof(struct ipxhdr)))
1648 goto drop;
1649
David S. Millerfff64252006-08-09 17:36:15 -07001650 ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize);
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001651
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 /* Too small or invalid header? */
Stephen Hemminger8b5cc5e2006-08-07 20:09:20 -07001653 if (ipx_pktsize < sizeof(struct ipxhdr) ||
1654 !pskb_may_pull(skb, ipx_pktsize))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 goto drop;
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001656
Stephen Hemminger7b1ba8d2006-08-08 16:48:51 -07001657 ipx = ipx_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658 if (ipx->ipx_checksum != IPX_NO_CHECKSUM &&
1659 ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize))
1660 goto drop;
1661
1662 IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl;
1663 IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net;
1664 IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net;
1665
1666 /* Determine what local ipx endpoint this is */
1667 intrfc = ipxitf_find_using_phys(dev, pt->type);
1668 if (!intrfc) {
1669 if (ipxcfg_auto_create_interfaces &&
Al Viro4833ed02006-11-03 00:27:06 -08001670 IPX_SKB_CB(skb)->ipx_dest_net) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 intrfc = ipxitf_auto_create(dev, pt->type);
1672 if (intrfc)
1673 ipxitf_hold(intrfc);
1674 }
1675
1676 if (!intrfc) /* Not one of ours */
1677 /* or invalid packet for auto creation */
1678 goto drop;
1679 }
1680
1681 rc = ipxitf_rcv(intrfc, skb);
1682 ipxitf_put(intrfc);
1683 goto out;
1684drop:
1685 kfree_skb(skb);
1686out:
1687 return rc;
1688}
1689
1690static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock,
1691 struct msghdr *msg, size_t len)
1692{
1693 struct sock *sk = sock->sk;
1694 struct ipx_sock *ipxs = ipx_sk(sk);
Steffen Hurrle342dfc32014-01-17 22:53:15 +01001695 DECLARE_SOCKADDR(struct sockaddr_ipx *, usipx, msg->msg_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 struct sockaddr_ipx local_sipx;
1697 int rc = -EINVAL;
1698 int flags = msg->msg_flags;
1699
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001700 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 /* 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
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001724 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 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->msg_iov, len,
1748 flags & MSG_DONTWAIT);
1749 if (rc >= 0)
1750 rc = len;
1751out:
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001752 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 return rc;
1754}
1755
1756
1757static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
1758 struct msghdr *msg, size_t size, int flags)
1759{
1760 struct sock *sk = sock->sk;
1761 struct ipx_sock *ipxs = ipx_sk(sk);
Steffen Hurrle342dfc32014-01-17 22:53:15 +01001762 DECLARE_SOCKADDR(struct sockaddr_ipx *, sipx, msg->msg_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763 struct ipxhdr *ipx = NULL;
1764 struct sk_buff *skb;
1765 int copied, rc;
1766
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001767 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 /* 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
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001782 rc = __ipx_bind(sock, (struct sockaddr *)&uaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 sizeof(struct sockaddr_ipx));
1784 if (rc)
1785 goto out;
1786 }
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001787
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788 rc = -ENOTCONN;
1789 if (sock_flag(sk, SOCK_ZAPPED))
1790 goto out;
1791
1792 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1793 flags & MSG_DONTWAIT, &rc);
1794 if (!skb)
1795 goto out;
1796
1797 ipx = ipx_hdr(skb);
1798 copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr);
1799 if (copied > size) {
1800 copied = size;
1801 msg->msg_flags |= MSG_TRUNC;
1802 }
1803
1804 rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov,
1805 copied);
1806 if (rc)
1807 goto out_free;
Eric Dumazetb7aa0bf2007-04-19 16:16:32 -07001808 if (skb->tstamp.tv64)
1809 sk->sk_stamp = skb->tstamp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 if (sipx) {
1812 sipx->sipx_family = AF_IPX;
1813 sipx->sipx_port = ipx->ipx_source.sock;
1814 memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN);
1815 sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net;
1816 sipx->sipx_type = ipx->ipx_type;
1817 sipx->sipx_zero = 0;
Hannes Frederic Sowaf3d33422013-11-21 03:14:22 +01001818 msg->msg_namelen = sizeof(*sipx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819 }
1820 rc = copied;
1821
1822out_free:
1823 skb_free_datagram(sk, skb);
1824out:
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001825 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 return rc;
1827}
1828
1829
1830static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1831{
1832 int rc = 0;
1833 long amount = 0;
1834 struct sock *sk = sock->sk;
1835 void __user *argp = (void __user *)arg;
1836
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001837 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 switch (cmd) {
1839 case TIOCOUTQ:
Eric Dumazet31e6d362009-06-17 19:05:41 -07001840 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841 if (amount < 0)
1842 amount = 0;
1843 rc = put_user(amount, (int __user *)argp);
1844 break;
1845 case TIOCINQ: {
1846 struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
1847 /* These two are safe on a single CPU system as only
1848 * user tasks fiddle here */
1849 if (skb)
1850 amount = skb->len - sizeof(struct ipxhdr);
1851 rc = put_user(amount, (int __user *)argp);
1852 break;
1853 }
1854 case SIOCADDRT:
1855 case SIOCDELRT:
1856 rc = -EPERM;
1857 if (capable(CAP_NET_ADMIN))
1858 rc = ipxrtr_ioctl(cmd, argp);
1859 break;
1860 case SIOCSIFADDR:
1861 case SIOCAIPXITFCRT:
1862 case SIOCAIPXPRISLT:
1863 rc = -EPERM;
1864 if (!capable(CAP_NET_ADMIN))
1865 break;
1866 case SIOCGIFADDR:
1867 rc = ipxitf_ioctl(cmd, argp);
1868 break;
1869 case SIOCIPXCFGDATA:
1870 rc = ipxcfg_get_config_data(argp);
1871 break;
1872 case SIOCIPXNCPCONN:
1873 /*
1874 * This socket wants to take care of the NCP connection
1875 * handed to us in arg.
1876 */
YOSHIFUJI Hideaki981c0ff2007-02-09 23:24:51 +09001877 rc = -EPERM;
1878 if (!capable(CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 break;
1880 rc = get_user(ipx_sk(sk)->ipx_ncp_conn,
1881 (const unsigned short __user *)argp);
1882 break;
1883 case SIOCGSTAMP:
David S. Miller32e90722012-05-19 00:51:04 -04001884 rc = sock_get_timestamp(sk, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 break;
1886 case SIOCGIFDSTADDR:
1887 case SIOCSIFDSTADDR:
1888 case SIOCGIFBRDADDR:
1889 case SIOCSIFBRDADDR:
1890 case SIOCGIFNETMASK:
1891 case SIOCSIFNETMASK:
1892 rc = -EINVAL;
1893 break;
1894 default:
Christoph Hellwigb5e5fa52006-01-03 14:18:33 -08001895 rc = -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 break;
1897 }
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001898 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899
1900 return rc;
1901}
1902
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08001903
1904#ifdef CONFIG_COMPAT
1905static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1906{
1907 /*
1908 * These 4 commands use same structure on 32bit and 64bit. Rest of IPX
1909 * commands is handled by generic ioctl code. As these commands are
1910 * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic
1911 * code.
1912 */
1913 switch (cmd) {
1914 case SIOCAIPXITFCRT:
1915 case SIOCAIPXPRISLT:
1916 case SIOCIPXCFGDATA:
1917 case SIOCIPXNCPCONN:
1918 return ipx_ioctl(sock, cmd, arg);
1919 default:
1920 return -ENOIOCTLCMD;
1921 }
1922}
1923#endif
1924
1925
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926/*
1927 * Socket family declarations
1928 */
1929
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +00001930static const struct net_proto_family ipx_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 .family = PF_IPX,
1932 .create = ipx_create,
1933 .owner = THIS_MODULE,
1934};
1935
Arnd Bergmann83927ba2009-11-05 04:37:27 +00001936static const struct proto_ops ipx_dgram_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 .family = PF_IPX,
1938 .owner = THIS_MODULE,
1939 .release = ipx_release,
1940 .bind = ipx_bind,
1941 .connect = ipx_connect,
1942 .socketpair = sock_no_socketpair,
1943 .accept = sock_no_accept,
1944 .getname = ipx_getname,
Arnd Bergmannb0d0d912011-01-25 21:49:56 +01001945 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 .ioctl = ipx_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08001947#ifdef CONFIG_COMPAT
1948 .compat_ioctl = ipx_compat_ioctl,
1949#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 .listen = sock_no_listen,
1951 .shutdown = sock_no_shutdown, /* FIXME: support shutdown */
1952 .setsockopt = ipx_setsockopt,
1953 .getsockopt = ipx_getsockopt,
1954 .sendmsg = ipx_sendmsg,
1955 .recvmsg = ipx_recvmsg,
1956 .mmap = sock_no_mmap,
1957 .sendpage = sock_no_sendpage,
1958};
1959
Stephen Hemminger7546dd92009-03-09 08:18:29 +00001960static struct packet_type ipx_8023_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -08001961 .type = cpu_to_be16(ETH_P_802_3),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 .func = ipx_rcv,
1963};
1964
Stephen Hemminger7546dd92009-03-09 08:18:29 +00001965static struct packet_type ipx_dix_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -08001966 .type = cpu_to_be16(ETH_P_IPX),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967 .func = ipx_rcv,
1968};
1969
1970static struct notifier_block ipx_dev_notifier = {
1971 .notifier_call = ipxitf_device_event,
1972};
1973
Stephen Hemmingerfa665cc2009-03-20 05:45:39 +00001974static const unsigned char ipx_8022_type = 0xE0;
1975static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
1976static const char ipx_EII_err_msg[] __initconst =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 KERN_CRIT "IPX: Unable to register with Ethernet II\n";
Stephen Hemmingerfa665cc2009-03-20 05:45:39 +00001978static const char ipx_8023_err_msg[] __initconst =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 KERN_CRIT "IPX: Unable to register with 802.3\n";
Stephen Hemmingerfa665cc2009-03-20 05:45:39 +00001980static const char ipx_llc_err_msg[] __initconst =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 KERN_CRIT "IPX: Unable to register with 802.2\n";
Stephen Hemmingerfa665cc2009-03-20 05:45:39 +00001982static const char ipx_snap_err_msg[] __initconst =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 KERN_CRIT "IPX: Unable to register with SNAP\n";
1984
1985static int __init ipx_init(void)
1986{
1987 int rc = proto_register(&ipx_proto, 1);
1988
1989 if (rc != 0)
1990 goto out;
1991
1992 sock_register(&ipx_family_ops);
1993
1994 pEII_datalink = make_EII_client();
1995 if (pEII_datalink)
1996 dev_add_pack(&ipx_dix_packet_type);
1997 else
1998 printk(ipx_EII_err_msg);
1999
2000 p8023_datalink = make_8023_client();
2001 if (p8023_datalink)
2002 dev_add_pack(&ipx_8023_packet_type);
2003 else
2004 printk(ipx_8023_err_msg);
2005
2006 p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv);
2007 if (!p8022_datalink)
2008 printk(ipx_llc_err_msg);
2009
2010 pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv);
2011 if (!pSNAP_datalink)
2012 printk(ipx_snap_err_msg);
2013
2014 register_netdevice_notifier(&ipx_dev_notifier);
2015 ipx_register_sysctl();
2016 ipx_proc_init();
2017out:
2018 return rc;
2019}
2020
2021static void __exit ipx_proto_finito(void)
2022{
2023 ipx_proc_exit();
2024 ipx_unregister_sysctl();
2025
2026 unregister_netdevice_notifier(&ipx_dev_notifier);
2027
2028 ipxitf_cleanup();
2029
Jiri Bohac1539b982007-02-08 16:02:21 -08002030 if (pSNAP_datalink) {
2031 unregister_snap_client(pSNAP_datalink);
2032 pSNAP_datalink = NULL;
2033 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034
Jiri Bohac1539b982007-02-08 16:02:21 -08002035 if (p8022_datalink) {
2036 unregister_8022_client(p8022_datalink);
2037 p8022_datalink = NULL;
2038 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039
2040 dev_remove_pack(&ipx_8023_packet_type);
Jiri Bohac1539b982007-02-08 16:02:21 -08002041 if (p8023_datalink) {
2042 destroy_8023_client(p8023_datalink);
2043 p8023_datalink = NULL;
2044 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045
2046 dev_remove_pack(&ipx_dix_packet_type);
Jiri Bohac1539b982007-02-08 16:02:21 -08002047 if (pEII_datalink) {
2048 destroy_EII_client(pEII_datalink);
2049 pEII_datalink = NULL;
2050 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051
2052 proto_unregister(&ipx_proto);
2053 sock_unregister(ipx_family_ops.family);
2054}
2055
2056module_init(ipx_init);
2057module_exit(ipx_proto_finito);
2058MODULE_LICENSE("GPL");
2059MODULE_ALIAS_NETPROTO(PF_IPX);