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Commit | Line | Data |
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1da177e4 LT |
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. | |
981c0ff6 | 14 | * Neither Alan Cox nor the Swansea University Computer Society admit |
1da177e4 LT |
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 | ||
4fc268d2 | 31 | #include <linux/capability.h> |
1da177e4 LT |
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> | |
5a0e3ad6 | 43 | #include <linux/slab.h> |
1da177e4 LT |
44 | #include <linux/skbuff.h> |
45 | #include <linux/socket.h> | |
46 | #include <linux/sockios.h> | |
47 | #include <linux/string.h> | |
1da177e4 LT |
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> | |
7780d8ae | 55 | #include <net/datalink.h> |
c752f073 | 56 | #include <net/tcp_states.h> |
1da177e4 LT |
57 | |
58 | #include <asm/uaccess.h> | |
59 | ||
60 | #ifdef CONFIG_SYSCTL | |
61 | extern void ipx_register_sysctl(void); | |
62 | extern void ipx_unregister_sysctl(void); | |
63 | #else | |
64 | #define ipx_register_sysctl() | |
65 | #define ipx_unregister_sysctl() | |
66 | #endif | |
67 | ||
68 | /* Configuration Variables */ | |
69 | static unsigned char ipxcfg_max_hops = 16; | |
70 | static char ipxcfg_auto_select_primary; | |
71 | static char ipxcfg_auto_create_interfaces; | |
72 | int sysctl_ipx_pprop_broadcasting = 1; | |
73 | ||
74 | /* Global Variables */ | |
75 | static struct datalink_proto *p8022_datalink; | |
76 | static struct datalink_proto *pEII_datalink; | |
77 | static struct datalink_proto *p8023_datalink; | |
78 | static struct datalink_proto *pSNAP_datalink; | |
79 | ||
90ddc4f0 | 80 | static const struct proto_ops ipx_dgram_ops; |
1da177e4 LT |
81 | |
82 | LIST_HEAD(ipx_interfaces); | |
83 | DEFINE_SPINLOCK(ipx_interfaces_lock); | |
84 | ||
85 | struct ipx_interface *ipx_primary_net; | |
86 | struct ipx_interface *ipx_internal_net; | |
87 | ||
1da177e4 LT |
88 | struct ipx_interface *ipx_interfaces_head(void) |
89 | { | |
90 | struct ipx_interface *rc = NULL; | |
91 | ||
92 | if (!list_empty(&ipx_interfaces)) | |
93 | rc = list_entry(ipx_interfaces.next, | |
94 | struct ipx_interface, node); | |
95 | return rc; | |
96 | } | |
97 | ||
98 | static void ipxcfg_set_auto_select(char val) | |
99 | { | |
100 | ipxcfg_auto_select_primary = val; | |
101 | if (val && !ipx_primary_net) | |
102 | ipx_primary_net = ipx_interfaces_head(); | |
103 | } | |
104 | ||
105 | static int ipxcfg_get_config_data(struct ipx_config_data __user *arg) | |
106 | { | |
107 | struct ipx_config_data vals; | |
108 | ||
109 | vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces; | |
110 | vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary; | |
111 | ||
112 | return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Note: Sockets may not be removed _during_ an interrupt or inet_bh | |
117 | * handler using this technique. They can be added although we do not | |
118 | * use this facility. | |
119 | */ | |
120 | ||
121 | static void ipx_remove_socket(struct sock *sk) | |
122 | { | |
123 | /* Determine interface with which socket is associated */ | |
124 | struct ipx_interface *intrfc = ipx_sk(sk)->intrfc; | |
125 | ||
126 | if (!intrfc) | |
127 | goto out; | |
128 | ||
129 | ipxitf_hold(intrfc); | |
130 | spin_lock_bh(&intrfc->if_sklist_lock); | |
131 | sk_del_node_init(sk); | |
132 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
133 | ipxitf_put(intrfc); | |
134 | out: | |
135 | return; | |
136 | } | |
137 | ||
138 | static void ipx_destroy_socket(struct sock *sk) | |
139 | { | |
140 | ipx_remove_socket(sk); | |
141 | skb_queue_purge(&sk->sk_receive_queue); | |
c2b42336 | 142 | sk_refcnt_debug_dec(sk); |
1da177e4 LT |
143 | } |
144 | ||
981c0ff6 | 145 | /* |
1da177e4 LT |
146 | * The following code is used to support IPX Interfaces (IPXITF). An |
147 | * IPX interface is defined by a physical device and a frame type. | |
148 | */ | |
149 | ||
150 | /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */ | |
151 | ||
152 | static void ipxitf_clear_primary_net(void) | |
153 | { | |
154 | ipx_primary_net = NULL; | |
155 | if (ipxcfg_auto_select_primary) | |
156 | ipx_primary_net = ipx_interfaces_head(); | |
157 | } | |
158 | ||
159 | static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev, | |
4833ed09 | 160 | __be16 datalink) |
1da177e4 LT |
161 | { |
162 | struct ipx_interface *i; | |
163 | ||
164 | list_for_each_entry(i, &ipx_interfaces, node) | |
165 | if (i->if_dev == dev && i->if_dlink_type == datalink) | |
166 | goto out; | |
167 | i = NULL; | |
168 | out: | |
169 | return i; | |
170 | } | |
171 | ||
172 | static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev, | |
4833ed09 | 173 | __be16 datalink) |
1da177e4 LT |
174 | { |
175 | struct ipx_interface *i; | |
176 | ||
177 | spin_lock_bh(&ipx_interfaces_lock); | |
178 | i = __ipxitf_find_using_phys(dev, datalink); | |
179 | if (i) | |
180 | ipxitf_hold(i); | |
181 | spin_unlock_bh(&ipx_interfaces_lock); | |
182 | return i; | |
183 | } | |
184 | ||
4833ed09 | 185 | struct ipx_interface *ipxitf_find_using_net(__be32 net) |
1da177e4 LT |
186 | { |
187 | struct ipx_interface *i; | |
188 | ||
189 | spin_lock_bh(&ipx_interfaces_lock); | |
190 | if (net) { | |
191 | list_for_each_entry(i, &ipx_interfaces, node) | |
192 | if (i->if_netnum == net) | |
193 | goto hold; | |
194 | i = NULL; | |
195 | goto unlock; | |
196 | } | |
197 | ||
198 | i = ipx_primary_net; | |
199 | if (i) | |
200 | hold: | |
201 | ipxitf_hold(i); | |
202 | unlock: | |
203 | spin_unlock_bh(&ipx_interfaces_lock); | |
204 | return i; | |
205 | } | |
206 | ||
207 | /* Sockets are bound to a particular IPX interface. */ | |
208 | static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk) | |
209 | { | |
210 | ipxitf_hold(intrfc); | |
211 | spin_lock_bh(&intrfc->if_sklist_lock); | |
212 | ipx_sk(sk)->intrfc = intrfc; | |
213 | sk_add_node(sk, &intrfc->if_sklist); | |
214 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
215 | ipxitf_put(intrfc); | |
216 | } | |
217 | ||
218 | /* caller must hold intrfc->if_sklist_lock */ | |
219 | static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc, | |
4833ed09 | 220 | __be16 port) |
1da177e4 LT |
221 | { |
222 | struct sock *s; | |
1da177e4 | 223 | |
b67bfe0d | 224 | sk_for_each(s, &intrfc->if_sklist) |
1da177e4 LT |
225 | if (ipx_sk(s)->port == port) |
226 | goto found; | |
227 | s = NULL; | |
228 | found: | |
229 | return s; | |
230 | } | |
231 | ||
232 | /* caller must hold a reference to intrfc */ | |
233 | static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc, | |
4833ed09 | 234 | __be16 port) |
1da177e4 LT |
235 | { |
236 | struct sock *s; | |
237 | ||
238 | spin_lock_bh(&intrfc->if_sklist_lock); | |
239 | s = __ipxitf_find_socket(intrfc, port); | |
240 | if (s) | |
241 | sock_hold(s); | |
242 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
243 | ||
244 | return s; | |
245 | } | |
246 | ||
247 | #ifdef CONFIG_IPX_INTERN | |
248 | static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc, | |
249 | unsigned char *ipx_node, | |
4833ed09 | 250 | __be16 port) |
1da177e4 LT |
251 | { |
252 | struct sock *s; | |
1da177e4 LT |
253 | |
254 | ipxitf_hold(intrfc); | |
255 | spin_lock_bh(&intrfc->if_sklist_lock); | |
256 | ||
b67bfe0d | 257 | sk_for_each(s, &intrfc->if_sklist) { |
1da177e4 LT |
258 | struct ipx_sock *ipxs = ipx_sk(s); |
259 | ||
260 | if (ipxs->port == port && | |
261 | !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN)) | |
262 | goto found; | |
263 | } | |
264 | s = NULL; | |
265 | found: | |
266 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
267 | ipxitf_put(intrfc); | |
268 | return s; | |
269 | } | |
270 | #endif | |
271 | ||
272 | static void __ipxitf_down(struct ipx_interface *intrfc) | |
273 | { | |
274 | struct sock *s; | |
b67bfe0d | 275 | struct hlist_node *t; |
1da177e4 LT |
276 | |
277 | /* Delete all routes associated with this interface */ | |
278 | ipxrtr_del_routes(intrfc); | |
279 | ||
280 | spin_lock_bh(&intrfc->if_sklist_lock); | |
281 | /* error sockets */ | |
b67bfe0d | 282 | sk_for_each_safe(s, t, &intrfc->if_sklist) { |
1da177e4 LT |
283 | struct ipx_sock *ipxs = ipx_sk(s); |
284 | ||
285 | s->sk_err = ENOLINK; | |
286 | s->sk_error_report(s); | |
287 | ipxs->intrfc = NULL; | |
288 | ipxs->port = 0; | |
289 | sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */ | |
290 | sk_del_node_init(s); | |
291 | } | |
292 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
293 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
294 | ||
295 | /* remove this interface from list */ | |
296 | list_del(&intrfc->node); | |
297 | ||
298 | /* remove this interface from *special* networks */ | |
299 | if (intrfc == ipx_primary_net) | |
300 | ipxitf_clear_primary_net(); | |
301 | if (intrfc == ipx_internal_net) | |
302 | ipx_internal_net = NULL; | |
303 | ||
304 | if (intrfc->if_dev) | |
305 | dev_put(intrfc->if_dev); | |
306 | kfree(intrfc); | |
307 | } | |
308 | ||
309 | void ipxitf_down(struct ipx_interface *intrfc) | |
310 | { | |
311 | spin_lock_bh(&ipx_interfaces_lock); | |
312 | __ipxitf_down(intrfc); | |
313 | spin_unlock_bh(&ipx_interfaces_lock); | |
314 | } | |
315 | ||
316 | static __inline__ void __ipxitf_put(struct ipx_interface *intrfc) | |
317 | { | |
318 | if (atomic_dec_and_test(&intrfc->refcnt)) | |
319 | __ipxitf_down(intrfc); | |
320 | } | |
321 | ||
322 | static int ipxitf_device_event(struct notifier_block *notifier, | |
323 | unsigned long event, void *ptr) | |
324 | { | |
351638e7 | 325 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
1da177e4 LT |
326 | struct ipx_interface *i, *tmp; |
327 | ||
721499e8 | 328 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
329 | return NOTIFY_DONE; |
330 | ||
1da177e4 LT |
331 | if (event != NETDEV_DOWN && event != NETDEV_UP) |
332 | goto out; | |
333 | ||
334 | spin_lock_bh(&ipx_interfaces_lock); | |
335 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) | |
336 | if (i->if_dev == dev) { | |
337 | if (event == NETDEV_UP) | |
338 | ipxitf_hold(i); | |
339 | else | |
340 | __ipxitf_put(i); | |
341 | } | |
342 | spin_unlock_bh(&ipx_interfaces_lock); | |
343 | out: | |
344 | return NOTIFY_DONE; | |
345 | } | |
346 | ||
347 | ||
348 | static __exit void ipxitf_cleanup(void) | |
349 | { | |
350 | struct ipx_interface *i, *tmp; | |
351 | ||
352 | spin_lock_bh(&ipx_interfaces_lock); | |
981c0ff6 | 353 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) |
1da177e4 LT |
354 | __ipxitf_put(i); |
355 | spin_unlock_bh(&ipx_interfaces_lock); | |
356 | } | |
357 | ||
358 | static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb) | |
359 | { | |
360 | if (sock_queue_rcv_skb(sock, skb) < 0) | |
361 | kfree_skb(skb); | |
362 | } | |
363 | ||
364 | /* | |
365 | * On input skb->sk is NULL. Nobody is charged for the memory. | |
366 | */ | |
367 | ||
368 | /* caller must hold a reference to intrfc */ | |
369 | ||
370 | #ifdef CONFIG_IPX_INTERN | |
371 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
372 | struct sk_buff *skb, int copy) | |
373 | { | |
374 | struct ipxhdr *ipx = ipx_hdr(skb); | |
375 | int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node, | |
376 | IPX_NODE_LEN); | |
377 | struct sock *s; | |
1da177e4 LT |
378 | int rc; |
379 | ||
380 | spin_lock_bh(&intrfc->if_sklist_lock); | |
381 | ||
b67bfe0d | 382 | sk_for_each(s, &intrfc->if_sklist) { |
1da177e4 LT |
383 | struct ipx_sock *ipxs = ipx_sk(s); |
384 | ||
385 | if (ipxs->port == ipx->ipx_dest.sock && | |
386 | (is_broadcast || !memcmp(ipx->ipx_dest.node, | |
387 | ipxs->node, IPX_NODE_LEN))) { | |
388 | /* We found a socket to which to send */ | |
389 | struct sk_buff *skb1; | |
390 | ||
391 | if (copy) { | |
392 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
393 | rc = -ENOMEM; | |
394 | if (!skb1) | |
395 | goto out; | |
396 | } else { | |
397 | skb1 = skb; | |
398 | copy = 1; /* skb may only be used once */ | |
399 | } | |
400 | ipxitf_def_skb_handler(s, skb1); | |
401 | ||
402 | /* On an external interface, one socket can listen */ | |
403 | if (intrfc != ipx_internal_net) | |
404 | break; | |
405 | } | |
406 | } | |
407 | ||
408 | /* skb was solely for us, and we did not make a copy, so free it. */ | |
409 | if (!copy) | |
410 | kfree_skb(skb); | |
411 | ||
412 | rc = 0; | |
413 | out: | |
414 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
415 | return rc; | |
416 | } | |
417 | #else | |
418 | static struct sock *ncp_connection_hack(struct ipx_interface *intrfc, | |
419 | struct ipxhdr *ipx) | |
420 | { | |
421 | /* The packet's target is a NCP connection handler. We want to hand it | |
422 | * to the correct socket directly within the kernel, so that the | |
423 | * mars_nwe packet distribution process does not have to do it. Here we | |
424 | * only care about NCP and BURST packets. | |
425 | * | |
426 | * You might call this a hack, but believe me, you do not want a | |
427 | * complete NCP layer in the kernel, and this is VERY fast as well. */ | |
428 | struct sock *sk = NULL; | |
981c0ff6 | 429 | int connection = 0; |
1da177e4 LT |
430 | u8 *ncphdr = (u8 *)(ipx + 1); |
431 | ||
981c0ff6 | 432 | if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */ |
1da177e4 LT |
433 | connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3); |
434 | else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */ | |
435 | connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8); | |
436 | ||
437 | if (connection) { | |
1da177e4 LT |
438 | /* Now we have to look for a special NCP connection handling |
439 | * socket. Only these sockets have ipx_ncp_conn != 0, set by | |
440 | * SIOCIPXNCPCONN. */ | |
441 | spin_lock_bh(&intrfc->if_sklist_lock); | |
b67bfe0d | 442 | sk_for_each(sk, &intrfc->if_sklist) |
1da177e4 LT |
443 | if (ipx_sk(sk)->ipx_ncp_conn == connection) { |
444 | sock_hold(sk); | |
445 | goto found; | |
446 | } | |
447 | sk = NULL; | |
448 | found: | |
449 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
450 | } | |
451 | return sk; | |
452 | } | |
453 | ||
454 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
455 | struct sk_buff *skb, int copy) | |
456 | { | |
457 | struct ipxhdr *ipx = ipx_hdr(skb); | |
458 | struct sock *sock1 = NULL, *sock2 = NULL; | |
459 | struct sk_buff *skb1 = NULL, *skb2 = NULL; | |
460 | int rc; | |
461 | ||
462 | if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451) | |
463 | sock1 = ncp_connection_hack(intrfc, ipx); | |
981c0ff6 | 464 | if (!sock1) |
1da177e4 LT |
465 | /* No special socket found, forward the packet the normal way */ |
466 | sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock); | |
467 | ||
468 | /* | |
469 | * We need to check if there is a primary net and if | |
470 | * this is addressed to one of the *SPECIAL* sockets because | |
471 | * these need to be propagated to the primary net. | |
472 | * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and | |
473 | * 0x456(Diagnostic). | |
474 | */ | |
475 | ||
476 | if (ipx_primary_net && intrfc != ipx_primary_net) { | |
477 | const int dsock = ntohs(ipx->ipx_dest.sock); | |
478 | ||
479 | if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456) | |
480 | /* The appropriate thing to do here is to dup the | |
481 | * packet and route to the primary net interface via | |
482 | * ipxitf_send; however, we'll cheat and just demux it | |
483 | * here. */ | |
484 | sock2 = ipxitf_find_socket(ipx_primary_net, | |
485 | ipx->ipx_dest.sock); | |
486 | } | |
487 | ||
488 | /* | |
489 | * If there is nothing to do return. The kfree will cancel any charging. | |
490 | */ | |
491 | rc = 0; | |
492 | if (!sock1 && !sock2) { | |
493 | if (!copy) | |
494 | kfree_skb(skb); | |
495 | goto out; | |
496 | } | |
497 | ||
498 | /* | |
499 | * This next segment of code is a little awkward, but it sets it up | |
500 | * so that the appropriate number of copies of the SKB are made and | |
501 | * that skb1 and skb2 point to it (them) so that it (they) can be | |
502 | * demuxed to sock1 and/or sock2. If we are unable to make enough | |
503 | * copies, we do as much as is possible. | |
504 | */ | |
505 | ||
506 | if (copy) | |
507 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
508 | else | |
509 | skb1 = skb; | |
510 | ||
511 | rc = -ENOMEM; | |
512 | if (!skb1) | |
513 | goto out_put; | |
514 | ||
515 | /* Do we need 2 SKBs? */ | |
516 | if (sock1 && sock2) | |
517 | skb2 = skb_clone(skb1, GFP_ATOMIC); | |
518 | else | |
519 | skb2 = skb1; | |
520 | ||
521 | if (sock1) | |
522 | ipxitf_def_skb_handler(sock1, skb1); | |
523 | ||
524 | if (!skb2) | |
525 | goto out_put; | |
526 | ||
527 | if (sock2) | |
528 | ipxitf_def_skb_handler(sock2, skb2); | |
529 | ||
530 | rc = 0; | |
531 | out_put: | |
532 | if (sock1) | |
533 | sock_put(sock1); | |
534 | if (sock2) | |
535 | sock_put(sock2); | |
536 | out: | |
537 | return rc; | |
538 | } | |
539 | #endif /* CONFIG_IPX_INTERN */ | |
540 | ||
541 | static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc, | |
542 | struct sk_buff *skb) | |
543 | { | |
544 | struct sk_buff *skb2; | |
545 | int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head; | |
546 | int out_offset = intrfc->if_ipx_offset; | |
547 | int len; | |
548 | ||
549 | /* Hopefully, most cases */ | |
550 | if (in_offset >= out_offset) | |
551 | return skb; | |
552 | ||
553 | /* Need new SKB */ | |
554 | len = skb->len + out_offset; | |
555 | skb2 = alloc_skb(len, GFP_ATOMIC); | |
556 | if (skb2) { | |
557 | skb_reserve(skb2, out_offset); | |
7e28ecc2 | 558 | skb_reset_network_header(skb2); |
badff6d0 | 559 | skb_reset_transport_header(skb2); |
7e28ecc2 | 560 | skb_put(skb2, skb->len); |
1da177e4 LT |
561 | memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len); |
562 | memcpy(skb2->cb, skb->cb, sizeof(skb->cb)); | |
563 | } | |
564 | kfree_skb(skb); | |
565 | return skb2; | |
566 | } | |
567 | ||
568 | /* caller must hold a reference to intrfc and the skb has to be unshared */ | |
569 | int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node) | |
570 | { | |
571 | struct ipxhdr *ipx = ipx_hdr(skb); | |
572 | struct net_device *dev = intrfc->if_dev; | |
573 | struct datalink_proto *dl = intrfc->if_dlink; | |
574 | char dest_node[IPX_NODE_LEN]; | |
575 | int send_to_wire = 1; | |
576 | int addr_len; | |
577 | ||
578 | ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl; | |
579 | ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net; | |
580 | ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net; | |
581 | ||
582 | /* see if we need to include the netnum in the route list */ | |
583 | if (IPX_SKB_CB(skb)->last_hop.index >= 0) { | |
4833ed09 | 584 | __be32 *last_hop = (__be32 *)(((u8 *) skb->data) + |
1da177e4 LT |
585 | sizeof(struct ipxhdr) + |
586 | IPX_SKB_CB(skb)->last_hop.index * | |
4833ed09 | 587 | sizeof(__be32)); |
1da177e4 LT |
588 | *last_hop = IPX_SKB_CB(skb)->last_hop.netnum; |
589 | IPX_SKB_CB(skb)->last_hop.index = -1; | |
590 | } | |
981c0ff6 YH |
591 | |
592 | /* | |
1da177e4 LT |
593 | * We need to know how many skbuffs it will take to send out this |
594 | * packet to avoid unnecessary copies. | |
595 | */ | |
981c0ff6 YH |
596 | |
597 | if (!dl || !dev || dev->flags & IFF_LOOPBACK) | |
1da177e4 LT |
598 | send_to_wire = 0; /* No non looped */ |
599 | ||
600 | /* | |
981c0ff6 | 601 | * See if this should be demuxed to sockets on this interface |
1da177e4 LT |
602 | * |
603 | * We want to ensure the original was eaten or that we only use | |
604 | * up clones. | |
605 | */ | |
981c0ff6 | 606 | |
1da177e4 LT |
607 | if (ipx->ipx_dest.net == intrfc->if_netnum) { |
608 | /* | |
609 | * To our own node, loop and free the original. | |
610 | * The internal net will receive on all node address. | |
611 | */ | |
612 | if (intrfc == ipx_internal_net || | |
613 | !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) { | |
614 | /* Don't charge sender */ | |
615 | skb_orphan(skb); | |
616 | ||
617 | /* Will charge receiver */ | |
618 | return ipxitf_demux_socket(intrfc, skb, 0); | |
619 | } | |
620 | ||
621 | /* Broadcast, loop and possibly keep to send on. */ | |
622 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) { | |
623 | if (!send_to_wire) | |
624 | skb_orphan(skb); | |
625 | ipxitf_demux_socket(intrfc, skb, send_to_wire); | |
626 | if (!send_to_wire) | |
627 | goto out; | |
628 | } | |
629 | } | |
630 | ||
631 | /* | |
632 | * If the originating net is not equal to our net; this is routed | |
633 | * We are still charging the sender. Which is right - the driver | |
634 | * free will handle this fairly. | |
635 | */ | |
636 | if (ipx->ipx_source.net != intrfc->if_netnum) { | |
637 | /* | |
638 | * Unshare the buffer before modifying the count in | |
639 | * case it's a flood or tcpdump | |
640 | */ | |
641 | skb = skb_unshare(skb, GFP_ATOMIC); | |
642 | if (!skb) | |
643 | goto out; | |
644 | if (++ipx->ipx_tctrl > ipxcfg_max_hops) | |
645 | send_to_wire = 0; | |
646 | } | |
647 | ||
648 | if (!send_to_wire) { | |
649 | kfree_skb(skb); | |
650 | goto out; | |
651 | } | |
652 | ||
653 | /* Determine the appropriate hardware address */ | |
654 | addr_len = dev->addr_len; | |
655 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) | |
656 | memcpy(dest_node, dev->broadcast, addr_len); | |
657 | else | |
658 | memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len); | |
659 | ||
660 | /* Make any compensation for differing physical/data link size */ | |
661 | skb = ipxitf_adjust_skbuff(intrfc, skb); | |
662 | if (!skb) | |
663 | goto out; | |
664 | ||
665 | /* set up data link and physical headers */ | |
666 | skb->dev = dev; | |
667 | skb->protocol = htons(ETH_P_IPX); | |
668 | ||
669 | /* Send it out */ | |
670 | dl->request(dl, skb, dest_node); | |
671 | out: | |
672 | return 0; | |
673 | } | |
674 | ||
675 | static int ipxitf_add_local_route(struct ipx_interface *intrfc) | |
676 | { | |
677 | return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL); | |
678 | } | |
679 | ||
680 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
681 | struct sk_buff *skb); | |
682 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb); | |
683 | ||
684 | static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb) | |
685 | { | |
686 | struct ipxhdr *ipx = ipx_hdr(skb); | |
687 | int rc = 0; | |
688 | ||
689 | ipxitf_hold(intrfc); | |
690 | ||
691 | /* See if we should update our network number */ | |
692 | if (!intrfc->if_netnum) /* net number of intrfc not known yet */ | |
981c0ff6 YH |
693 | ipxitf_discover_netnum(intrfc, skb); |
694 | ||
1da177e4 LT |
695 | IPX_SKB_CB(skb)->last_hop.index = -1; |
696 | if (ipx->ipx_type == IPX_TYPE_PPROP) { | |
697 | rc = ipxitf_pprop(intrfc, skb); | |
698 | if (rc) | |
699 | goto out_free_skb; | |
700 | } | |
701 | ||
702 | /* local processing follows */ | |
703 | if (!IPX_SKB_CB(skb)->ipx_dest_net) | |
704 | IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum; | |
705 | if (!IPX_SKB_CB(skb)->ipx_source_net) | |
706 | IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum; | |
707 | ||
708 | /* it doesn't make sense to route a pprop packet, there's no meaning | |
709 | * in the ipx_dest_net for such packets */ | |
710 | if (ipx->ipx_type != IPX_TYPE_PPROP && | |
711 | intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) { | |
712 | /* We only route point-to-point packets. */ | |
713 | if (skb->pkt_type == PACKET_HOST) { | |
714 | skb = skb_unshare(skb, GFP_ATOMIC); | |
715 | if (skb) | |
716 | rc = ipxrtr_route_skb(skb); | |
717 | goto out_intrfc; | |
718 | } | |
719 | ||
720 | goto out_free_skb; | |
721 | } | |
722 | ||
723 | /* see if we should keep it */ | |
724 | if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) || | |
725 | !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) { | |
726 | rc = ipxitf_demux_socket(intrfc, skb, 0); | |
727 | goto out_intrfc; | |
728 | } | |
729 | ||
730 | /* we couldn't pawn it off so unload it */ | |
731 | out_free_skb: | |
732 | kfree_skb(skb); | |
733 | out_intrfc: | |
734 | ipxitf_put(intrfc); | |
735 | return rc; | |
736 | } | |
737 | ||
738 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
739 | struct sk_buff *skb) | |
981c0ff6 | 740 | { |
1da177e4 LT |
741 | const struct ipx_cb *cb = IPX_SKB_CB(skb); |
742 | ||
743 | /* see if this is an intra packet: source_net == dest_net */ | |
744 | if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) { | |
745 | struct ipx_interface *i = | |
746 | ipxitf_find_using_net(cb->ipx_source_net); | |
747 | /* NB: NetWare servers lie about their hop count so we | |
748 | * dropped the test based on it. This is the best way | |
749 | * to determine this is a 0 hop count packet. */ | |
750 | if (!i) { | |
751 | intrfc->if_netnum = cb->ipx_source_net; | |
752 | ipxitf_add_local_route(intrfc); | |
753 | } else { | |
754 | printk(KERN_WARNING "IPX: Network number collision " | |
755 | "%lx\n %s %s and %s %s\n", | |
4833ed09 | 756 | (unsigned long) ntohl(cb->ipx_source_net), |
1da177e4 LT |
757 | ipx_device_name(i), |
758 | ipx_frame_name(i->if_dlink_type), | |
759 | ipx_device_name(intrfc), | |
760 | ipx_frame_name(intrfc->if_dlink_type)); | |
761 | ipxitf_put(i); | |
762 | } | |
763 | } | |
764 | } | |
765 | ||
766 | /** | |
767 | * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for | |
768 | * NetBIOS broadcasts | |
769 | * @intrfc: IPX interface receiving this packet | |
770 | * @skb: Received packet | |
771 | * | |
772 | * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it | |
773 | * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop | |
774 | * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we | |
775 | * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX | |
776 | * RIP and SAP Router Specification", Part Number 107-000029-001. | |
981c0ff6 | 777 | * |
1da177e4 LT |
778 | * If it is valid, check if we have pprop broadcasting enabled by the user, |
779 | * if not, just return zero for local processing. | |
780 | * | |
781 | * If it is enabled check the packet and don't broadcast it if we have already | |
782 | * seen this packet. | |
783 | * | |
784 | * Broadcast: send it to the interfaces that aren't on the packet visited nets | |
785 | * array, just after the IPX header. | |
786 | * | |
787 | * Returns -EINVAL for invalid packets, so that the calling function drops | |
788 | * the packet without local processing. 0 if packet is to be locally processed. | |
789 | */ | |
790 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb) | |
791 | { | |
792 | struct ipxhdr *ipx = ipx_hdr(skb); | |
793 | int i, rc = -EINVAL; | |
794 | struct ipx_interface *ifcs; | |
795 | char *c; | |
4833ed09 | 796 | __be32 *l; |
1da177e4 LT |
797 | |
798 | /* Illegal packet - too many hops or too short */ | |
799 | /* We decide to throw it away: no broadcasting, no local processing. | |
800 | * NetBIOS unaware implementations route them as normal packets - | |
801 | * tctrl <= 15, any data payload... */ | |
802 | if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS || | |
803 | ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) + | |
981c0ff6 | 804 | IPX_MAX_PPROP_HOPS * sizeof(u32)) |
1da177e4 LT |
805 | goto out; |
806 | /* are we broadcasting this damn thing? */ | |
807 | rc = 0; | |
808 | if (!sysctl_ipx_pprop_broadcasting) | |
809 | goto out; | |
810 | /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we | |
811 | * process it locally. All previous hops broadcasted it, and process it | |
812 | * locally. */ | |
813 | if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS) | |
814 | goto out; | |
981c0ff6 | 815 | |
1da177e4 | 816 | c = ((u8 *) ipx) + sizeof(struct ipxhdr); |
4833ed09 | 817 | l = (__be32 *) c; |
1da177e4 LT |
818 | |
819 | /* Don't broadcast packet if already seen this net */ | |
820 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
821 | if (*l++ == intrfc->if_netnum) | |
822 | goto out; | |
823 | ||
824 | /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the | |
825 | * position where we will insert recvd netnum into list, later on, | |
826 | * in ipxitf_send */ | |
827 | IPX_SKB_CB(skb)->last_hop.index = i; | |
828 | IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum; | |
829 | /* xmit on all other interfaces... */ | |
830 | spin_lock_bh(&ipx_interfaces_lock); | |
831 | list_for_each_entry(ifcs, &ipx_interfaces, node) { | |
832 | /* Except unconfigured interfaces */ | |
833 | if (!ifcs->if_netnum) | |
834 | continue; | |
981c0ff6 | 835 | |
1da177e4 LT |
836 | /* That aren't in the list */ |
837 | if (ifcs == intrfc) | |
838 | continue; | |
4833ed09 | 839 | l = (__be32 *) c; |
1da177e4 LT |
840 | /* don't consider the last entry in the packet list, |
841 | * it is our netnum, and it is not there yet */ | |
842 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
843 | if (ifcs->if_netnum == *l++) | |
844 | break; | |
845 | if (i == IPX_SKB_CB(skb)->ipx_tctrl) { | |
846 | struct sk_buff *s = skb_copy(skb, GFP_ATOMIC); | |
847 | ||
848 | if (s) { | |
849 | IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum; | |
850 | ipxrtr_route_skb(s); | |
851 | } | |
852 | } | |
853 | } | |
854 | spin_unlock_bh(&ipx_interfaces_lock); | |
855 | out: | |
856 | return rc; | |
857 | } | |
858 | ||
859 | static void ipxitf_insert(struct ipx_interface *intrfc) | |
860 | { | |
861 | spin_lock_bh(&ipx_interfaces_lock); | |
862 | list_add_tail(&intrfc->node, &ipx_interfaces); | |
863 | spin_unlock_bh(&ipx_interfaces_lock); | |
864 | ||
865 | if (ipxcfg_auto_select_primary && !ipx_primary_net) | |
866 | ipx_primary_net = intrfc; | |
867 | } | |
868 | ||
4833ed09 AV |
869 | static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum, |
870 | __be16 dlink_type, | |
1da177e4 LT |
871 | struct datalink_proto *dlink, |
872 | unsigned char internal, | |
873 | int ipx_offset) | |
874 | { | |
875 | struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC); | |
876 | ||
877 | if (intrfc) { | |
878 | intrfc->if_dev = dev; | |
879 | intrfc->if_netnum = netnum; | |
880 | intrfc->if_dlink_type = dlink_type; | |
881 | intrfc->if_dlink = dlink; | |
882 | intrfc->if_internal = internal; | |
883 | intrfc->if_ipx_offset = ipx_offset; | |
884 | intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET; | |
885 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
886 | atomic_set(&intrfc->refcnt, 1); | |
887 | spin_lock_init(&intrfc->if_sklist_lock); | |
888 | } | |
889 | ||
890 | return intrfc; | |
891 | } | |
892 | ||
893 | static int ipxitf_create_internal(struct ipx_interface_definition *idef) | |
894 | { | |
895 | struct ipx_interface *intrfc; | |
896 | int rc = -EEXIST; | |
897 | ||
898 | /* Only one primary network allowed */ | |
899 | if (ipx_primary_net) | |
900 | goto out; | |
901 | ||
902 | /* Must have a valid network number */ | |
903 | rc = -EADDRNOTAVAIL; | |
904 | if (!idef->ipx_network) | |
905 | goto out; | |
906 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
907 | rc = -EADDRINUSE; | |
908 | if (intrfc) { | |
909 | ipxitf_put(intrfc); | |
910 | goto out; | |
911 | } | |
912 | intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0); | |
913 | rc = -EAGAIN; | |
914 | if (!intrfc) | |
915 | goto out; | |
916 | memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN); | |
917 | ipx_internal_net = ipx_primary_net = intrfc; | |
918 | ipxitf_hold(intrfc); | |
919 | ipxitf_insert(intrfc); | |
920 | ||
921 | rc = ipxitf_add_local_route(intrfc); | |
922 | ipxitf_put(intrfc); | |
923 | out: | |
924 | return rc; | |
925 | } | |
926 | ||
4ac396c0 | 927 | static __be16 ipx_map_frame_type(unsigned char type) |
1da177e4 | 928 | { |
4ac396c0 | 929 | __be16 rc = 0; |
1da177e4 LT |
930 | |
931 | switch (type) { | |
932 | case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break; | |
933 | case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break; | |
934 | case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break; | |
935 | case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break; | |
936 | } | |
937 | ||
938 | return rc; | |
939 | } | |
940 | ||
941 | static int ipxitf_create(struct ipx_interface_definition *idef) | |
942 | { | |
943 | struct net_device *dev; | |
4833ed09 | 944 | __be16 dlink_type = 0; |
1da177e4 LT |
945 | struct datalink_proto *datalink = NULL; |
946 | struct ipx_interface *intrfc; | |
947 | int rc; | |
948 | ||
949 | if (idef->ipx_special == IPX_INTERNAL) { | |
950 | rc = ipxitf_create_internal(idef); | |
951 | goto out; | |
952 | } | |
953 | ||
954 | rc = -EEXIST; | |
955 | if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net) | |
956 | goto out; | |
957 | ||
958 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
959 | rc = -EADDRINUSE; | |
960 | if (idef->ipx_network && intrfc) { | |
961 | ipxitf_put(intrfc); | |
962 | goto out; | |
963 | } | |
964 | ||
965 | if (intrfc) | |
966 | ipxitf_put(intrfc); | |
967 | ||
881d966b | 968 | dev = dev_get_by_name(&init_net, idef->ipx_device); |
1da177e4 LT |
969 | rc = -ENODEV; |
970 | if (!dev) | |
971 | goto out; | |
972 | ||
973 | switch (idef->ipx_dlink_type) { | |
1da177e4 LT |
974 | case IPX_FRAME_8022: |
975 | dlink_type = htons(ETH_P_802_2); | |
976 | datalink = p8022_datalink; | |
977 | break; | |
978 | case IPX_FRAME_ETHERII: | |
979 | if (dev->type != ARPHRD_IEEE802) { | |
980 | dlink_type = htons(ETH_P_IPX); | |
981 | datalink = pEII_datalink; | |
982 | break; | |
211ed865 | 983 | } |
1da177e4 LT |
984 | /* fall through */ |
985 | case IPX_FRAME_SNAP: | |
986 | dlink_type = htons(ETH_P_SNAP); | |
987 | datalink = pSNAP_datalink; | |
988 | break; | |
989 | case IPX_FRAME_8023: | |
990 | dlink_type = htons(ETH_P_802_3); | |
991 | datalink = p8023_datalink; | |
992 | break; | |
993 | case IPX_FRAME_NONE: | |
994 | default: | |
995 | rc = -EPROTONOSUPPORT; | |
996 | goto out_dev; | |
997 | } | |
998 | ||
999 | rc = -ENETDOWN; | |
1000 | if (!(dev->flags & IFF_UP)) | |
1001 | goto out_dev; | |
1002 | ||
1003 | /* Check addresses are suitable */ | |
1004 | rc = -EINVAL; | |
1005 | if (dev->addr_len > IPX_NODE_LEN) | |
1006 | goto out_dev; | |
1007 | ||
1008 | intrfc = ipxitf_find_using_phys(dev, dlink_type); | |
1009 | if (!intrfc) { | |
1010 | /* Ok now create */ | |
1011 | intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type, | |
1012 | datalink, 0, dev->hard_header_len + | |
1013 | datalink->header_length); | |
1014 | rc = -EAGAIN; | |
1015 | if (!intrfc) | |
1016 | goto out_dev; | |
1017 | /* Setup primary if necessary */ | |
1018 | if (idef->ipx_special == IPX_PRIMARY) | |
1019 | ipx_primary_net = intrfc; | |
1020 | if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000", | |
1021 | IPX_NODE_LEN)) { | |
1022 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1023 | memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len, | |
1024 | dev->dev_addr, dev->addr_len); | |
1025 | } else | |
1026 | memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN); | |
1027 | ipxitf_hold(intrfc); | |
1028 | ipxitf_insert(intrfc); | |
1029 | } | |
1030 | ||
1031 | ||
1032 | /* If the network number is known, add a route */ | |
1033 | rc = 0; | |
1034 | if (!intrfc->if_netnum) | |
1035 | goto out_intrfc; | |
1036 | ||
1037 | rc = ipxitf_add_local_route(intrfc); | |
1038 | out_intrfc: | |
1039 | ipxitf_put(intrfc); | |
1040 | goto out; | |
1041 | out_dev: | |
1042 | dev_put(dev); | |
1043 | out: | |
1044 | return rc; | |
1045 | } | |
1046 | ||
1047 | static int ipxitf_delete(struct ipx_interface_definition *idef) | |
1048 | { | |
1049 | struct net_device *dev = NULL; | |
4833ed09 | 1050 | __be16 dlink_type = 0; |
1da177e4 LT |
1051 | struct ipx_interface *intrfc; |
1052 | int rc = 0; | |
1053 | ||
1054 | spin_lock_bh(&ipx_interfaces_lock); | |
1055 | if (idef->ipx_special == IPX_INTERNAL) { | |
1056 | if (ipx_internal_net) { | |
1057 | __ipxitf_put(ipx_internal_net); | |
1058 | goto out; | |
1059 | } | |
1060 | rc = -ENOENT; | |
1061 | goto out; | |
1062 | } | |
1063 | ||
1064 | dlink_type = ipx_map_frame_type(idef->ipx_dlink_type); | |
1065 | rc = -EPROTONOSUPPORT; | |
1066 | if (!dlink_type) | |
1067 | goto out; | |
1068 | ||
881d966b | 1069 | dev = __dev_get_by_name(&init_net, idef->ipx_device); |
1da177e4 LT |
1070 | rc = -ENODEV; |
1071 | if (!dev) | |
1072 | goto out; | |
1073 | ||
1074 | intrfc = __ipxitf_find_using_phys(dev, dlink_type); | |
1075 | rc = -EINVAL; | |
1076 | if (!intrfc) | |
1077 | goto out; | |
1078 | __ipxitf_put(intrfc); | |
1079 | ||
1080 | rc = 0; | |
1081 | out: | |
1082 | spin_unlock_bh(&ipx_interfaces_lock); | |
1083 | return rc; | |
1084 | } | |
1085 | ||
1086 | static struct ipx_interface *ipxitf_auto_create(struct net_device *dev, | |
4833ed09 | 1087 | __be16 dlink_type) |
1da177e4 LT |
1088 | { |
1089 | struct ipx_interface *intrfc = NULL; | |
1090 | struct datalink_proto *datalink; | |
1091 | ||
1092 | if (!dev) | |
1093 | goto out; | |
1094 | ||
1095 | /* Check addresses are suitable */ | |
1096 | if (dev->addr_len > IPX_NODE_LEN) | |
1097 | goto out; | |
1098 | ||
4833ed09 | 1099 | switch (ntohs(dlink_type)) { |
1da177e4 LT |
1100 | case ETH_P_IPX: datalink = pEII_datalink; break; |
1101 | case ETH_P_802_2: datalink = p8022_datalink; break; | |
1102 | case ETH_P_SNAP: datalink = pSNAP_datalink; break; | |
1103 | case ETH_P_802_3: datalink = p8023_datalink; break; | |
1104 | default: goto out; | |
1105 | } | |
1106 | ||
1107 | intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0, | |
1108 | dev->hard_header_len + datalink->header_length); | |
1109 | ||
1110 | if (intrfc) { | |
1111 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1112 | memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]), | |
1113 | dev->dev_addr, dev->addr_len); | |
1114 | spin_lock_init(&intrfc->if_sklist_lock); | |
1115 | atomic_set(&intrfc->refcnt, 1); | |
1116 | ipxitf_insert(intrfc); | |
1117 | dev_hold(dev); | |
1118 | } | |
1119 | ||
1120 | out: | |
1121 | return intrfc; | |
1122 | } | |
1123 | ||
1124 | static int ipxitf_ioctl(unsigned int cmd, void __user *arg) | |
1125 | { | |
1126 | int rc = -EINVAL; | |
1127 | struct ifreq ifr; | |
1128 | int val; | |
1129 | ||
1130 | switch (cmd) { | |
1131 | case SIOCSIFADDR: { | |
1132 | struct sockaddr_ipx *sipx; | |
1133 | struct ipx_interface_definition f; | |
1134 | ||
1135 | rc = -EFAULT; | |
1136 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1137 | break; | |
1138 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
1139 | rc = -EINVAL; | |
1140 | if (sipx->sipx_family != AF_IPX) | |
1141 | break; | |
1142 | f.ipx_network = sipx->sipx_network; | |
1143 | memcpy(f.ipx_device, ifr.ifr_name, | |
1144 | sizeof(f.ipx_device)); | |
1145 | memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN); | |
1146 | f.ipx_dlink_type = sipx->sipx_type; | |
1147 | f.ipx_special = sipx->sipx_special; | |
1148 | ||
1149 | if (sipx->sipx_action == IPX_DLTITF) | |
1150 | rc = ipxitf_delete(&f); | |
1151 | else | |
1152 | rc = ipxitf_create(&f); | |
1153 | break; | |
1154 | } | |
1155 | case SIOCGIFADDR: { | |
1156 | struct sockaddr_ipx *sipx; | |
1157 | struct ipx_interface *ipxif; | |
1158 | struct net_device *dev; | |
1159 | ||
1160 | rc = -EFAULT; | |
1161 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1162 | break; | |
1163 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
881d966b | 1164 | dev = __dev_get_by_name(&init_net, ifr.ifr_name); |
1da177e4 LT |
1165 | rc = -ENODEV; |
1166 | if (!dev) | |
1167 | break; | |
1168 | ipxif = ipxitf_find_using_phys(dev, | |
1169 | ipx_map_frame_type(sipx->sipx_type)); | |
1170 | rc = -EADDRNOTAVAIL; | |
1171 | if (!ipxif) | |
1172 | break; | |
1173 | ||
1174 | sipx->sipx_family = AF_IPX; | |
1175 | sipx->sipx_network = ipxif->if_netnum; | |
1176 | memcpy(sipx->sipx_node, ipxif->if_node, | |
1177 | sizeof(sipx->sipx_node)); | |
1178 | rc = -EFAULT; | |
1179 | if (copy_to_user(arg, &ifr, sizeof(ifr))) | |
1180 | break; | |
1181 | ipxitf_put(ipxif); | |
1182 | rc = 0; | |
1183 | break; | |
1184 | } | |
981c0ff6 | 1185 | case SIOCAIPXITFCRT: |
1da177e4 LT |
1186 | rc = -EFAULT; |
1187 | if (get_user(val, (unsigned char __user *) arg)) | |
1188 | break; | |
1189 | rc = 0; | |
1190 | ipxcfg_auto_create_interfaces = val; | |
1191 | break; | |
981c0ff6 | 1192 | case SIOCAIPXPRISLT: |
1da177e4 LT |
1193 | rc = -EFAULT; |
1194 | if (get_user(val, (unsigned char __user *) arg)) | |
1195 | break; | |
1196 | rc = 0; | |
1197 | ipxcfg_set_auto_select(val); | |
1198 | break; | |
1199 | } | |
1200 | ||
1201 | return rc; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * Checksum routine for IPX | |
1206 | */ | |
981c0ff6 | 1207 | |
1da177e4 LT |
1208 | /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */ |
1209 | /* This functions should *not* mess with packet contents */ | |
1210 | ||
02e60370 | 1211 | __be16 ipx_cksum(struct ipxhdr *packet, int length) |
1da177e4 | 1212 | { |
981c0ff6 YH |
1213 | /* |
1214 | * NOTE: sum is a net byte order quantity, which optimizes the | |
1da177e4 LT |
1215 | * loop. This only works on big and little endian machines. (I |
1216 | * don't know of a machine that isn't.) | |
1217 | */ | |
02e60370 AV |
1218 | /* handle the first 3 words separately; checksum should be skipped |
1219 | * and ipx_tctrl masked out */ | |
1220 | __u16 *p = (__u16 *)packet; | |
1221 | __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff)); | |
1222 | __u32 i = (length >> 1) - 3; /* Number of remaining complete words */ | |
1223 | ||
1224 | /* Loop through them */ | |
1225 | p += 3; | |
1226 | while (i--) | |
1da177e4 LT |
1227 | sum += *p++; |
1228 | ||
1229 | /* Add on the last part word if it exists */ | |
1230 | if (packet->ipx_pktsize & htons(1)) | |
02e60370 | 1231 | sum += (__force u16)htons(0xff00) & *p; |
1da177e4 LT |
1232 | |
1233 | /* Do final fixup */ | |
1234 | sum = (sum & 0xffff) + (sum >> 16); | |
1235 | ||
1236 | /* It's a pity there's no concept of carry in C */ | |
1237 | if (sum >= 0x10000) | |
1238 | sum++; | |
1239 | ||
02e60370 AV |
1240 | /* |
1241 | * Leave 0 alone; we don't want 0xffff here. Note that we can't get | |
1242 | * here with 0x10000, so this check is the same as ((__u16)sum) | |
1243 | */ | |
1244 | if (sum) | |
1245 | sum = ~sum; | |
1246 | ||
1247 | return (__force __be16)sum; | |
1da177e4 LT |
1248 | } |
1249 | ||
4833ed09 | 1250 | const char *ipx_frame_name(__be16 frame) |
1da177e4 LT |
1251 | { |
1252 | char* rc = "None"; | |
1253 | ||
1254 | switch (ntohs(frame)) { | |
1255 | case ETH_P_IPX: rc = "EtherII"; break; | |
1256 | case ETH_P_802_2: rc = "802.2"; break; | |
1257 | case ETH_P_SNAP: rc = "SNAP"; break; | |
1258 | case ETH_P_802_3: rc = "802.3"; break; | |
1da177e4 LT |
1259 | } |
1260 | ||
1261 | return rc; | |
1262 | } | |
1263 | ||
1264 | const char *ipx_device_name(struct ipx_interface *intrfc) | |
1265 | { | |
1266 | return intrfc->if_internal ? "Internal" : | |
1267 | intrfc->if_dev ? intrfc->if_dev->name : "Unknown"; | |
1268 | } | |
1269 | ||
1270 | /* Handling for system calls applied via the various interfaces to an IPX | |
1271 | * socket object. */ | |
1272 | ||
1273 | static int ipx_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 1274 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
1275 | { |
1276 | struct sock *sk = sock->sk; | |
1277 | int opt; | |
1278 | int rc = -EINVAL; | |
1279 | ||
b0d0d915 | 1280 | lock_sock(sk); |
1da177e4 LT |
1281 | if (optlen != sizeof(int)) |
1282 | goto out; | |
1283 | ||
1284 | rc = -EFAULT; | |
1285 | if (get_user(opt, (unsigned int __user *)optval)) | |
1286 | goto out; | |
1287 | ||
1288 | rc = -ENOPROTOOPT; | |
1289 | if (!(level == SOL_IPX && optname == IPX_TYPE)) | |
1290 | goto out; | |
1291 | ||
1292 | ipx_sk(sk)->type = opt; | |
1293 | rc = 0; | |
1294 | out: | |
b0d0d915 | 1295 | release_sock(sk); |
1da177e4 LT |
1296 | return rc; |
1297 | } | |
1298 | ||
1299 | static int ipx_getsockopt(struct socket *sock, int level, int optname, | |
1300 | char __user *optval, int __user *optlen) | |
1301 | { | |
1302 | struct sock *sk = sock->sk; | |
1303 | int val = 0; | |
1304 | int len; | |
1305 | int rc = -ENOPROTOOPT; | |
1306 | ||
b0d0d915 | 1307 | lock_sock(sk); |
1da177e4 LT |
1308 | if (!(level == SOL_IPX && optname == IPX_TYPE)) |
1309 | goto out; | |
1310 | ||
1311 | val = ipx_sk(sk)->type; | |
1312 | ||
1313 | rc = -EFAULT; | |
1314 | if (get_user(len, optlen)) | |
1315 | goto out; | |
1316 | ||
1317 | len = min_t(unsigned int, len, sizeof(int)); | |
1318 | rc = -EINVAL; | |
1319 | if(len < 0) | |
1320 | goto out; | |
981c0ff6 | 1321 | |
1da177e4 LT |
1322 | rc = -EFAULT; |
1323 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) | |
1324 | goto out; | |
1325 | ||
1326 | rc = 0; | |
1327 | out: | |
b0d0d915 | 1328 | release_sock(sk); |
1da177e4 LT |
1329 | return rc; |
1330 | } | |
1331 | ||
1332 | static struct proto ipx_proto = { | |
1333 | .name = "IPX", | |
1334 | .owner = THIS_MODULE, | |
1335 | .obj_size = sizeof(struct ipx_sock), | |
1336 | }; | |
1337 | ||
3f378b68 EP |
1338 | static int ipx_create(struct net *net, struct socket *sock, int protocol, |
1339 | int kern) | |
1da177e4 LT |
1340 | { |
1341 | int rc = -ESOCKTNOSUPPORT; | |
1342 | struct sock *sk; | |
1343 | ||
09ad9bc7 | 1344 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
1345 | return -EAFNOSUPPORT; |
1346 | ||
1da177e4 LT |
1347 | /* |
1348 | * SPX support is not anymore in the kernel sources. If you want to | |
1349 | * ressurrect it, completing it and making it understand shared skbs, | |
1350 | * be fully multithreaded, etc, grab the sources in an early 2.5 kernel | |
1351 | * tree. | |
1352 | */ | |
1353 | if (sock->type != SOCK_DGRAM) | |
1354 | goto out; | |
1355 | ||
981c0ff6 | 1356 | rc = -ENOMEM; |
6257ff21 | 1357 | sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto); |
1da177e4 LT |
1358 | if (!sk) |
1359 | goto out; | |
c2b42336 PE |
1360 | |
1361 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
1362 | sock_init_data(sock, sk); |
1363 | sk->sk_no_check = 1; /* Checksum off by default */ | |
1364 | sock->ops = &ipx_dgram_ops; | |
1365 | rc = 0; | |
1366 | out: | |
1367 | return rc; | |
1368 | } | |
1369 | ||
1370 | static int ipx_release(struct socket *sock) | |
1371 | { | |
1372 | struct sock *sk = sock->sk; | |
1373 | ||
1374 | if (!sk) | |
1375 | goto out; | |
1376 | ||
b0d0d915 | 1377 | lock_sock(sk); |
1da177e4 LT |
1378 | if (!sock_flag(sk, SOCK_DEAD)) |
1379 | sk->sk_state_change(sk); | |
1380 | ||
1381 | sock_set_flag(sk, SOCK_DEAD); | |
1382 | sock->sk = NULL; | |
c2b42336 | 1383 | sk_refcnt_debug_release(sk); |
1da177e4 | 1384 | ipx_destroy_socket(sk); |
b0d0d915 | 1385 | release_sock(sk); |
674f2115 | 1386 | sock_put(sk); |
1da177e4 LT |
1387 | out: |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | /* caller must hold a reference to intrfc */ | |
1392 | ||
4833ed09 | 1393 | static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc) |
1da177e4 LT |
1394 | { |
1395 | unsigned short socketNum = intrfc->if_sknum; | |
1396 | ||
1397 | spin_lock_bh(&intrfc->if_sklist_lock); | |
1398 | ||
1399 | if (socketNum < IPX_MIN_EPHEMERAL_SOCKET) | |
1400 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1401 | ||
4833ed09 | 1402 | while (__ipxitf_find_socket(intrfc, htons(socketNum))) |
1da177e4 LT |
1403 | if (socketNum > IPX_MAX_EPHEMERAL_SOCKET) |
1404 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1405 | else | |
1406 | socketNum++; | |
1407 | ||
1408 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
1409 | intrfc->if_sknum = socketNum; | |
1410 | ||
4833ed09 | 1411 | return htons(socketNum); |
1da177e4 LT |
1412 | } |
1413 | ||
83927ba0 AB |
1414 | static int __ipx_bind(struct socket *sock, |
1415 | struct sockaddr *uaddr, int addr_len) | |
1da177e4 LT |
1416 | { |
1417 | struct sock *sk = sock->sk; | |
1418 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1419 | struct ipx_interface *intrfc; | |
1420 | struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr; | |
1421 | int rc = -EINVAL; | |
1422 | ||
1423 | if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx)) | |
1424 | goto out; | |
1425 | ||
1426 | intrfc = ipxitf_find_using_net(addr->sipx_network); | |
1427 | rc = -EADDRNOTAVAIL; | |
1428 | if (!intrfc) | |
1429 | goto out; | |
1430 | ||
1431 | if (!addr->sipx_port) { | |
1432 | addr->sipx_port = ipx_first_free_socketnum(intrfc); | |
1433 | rc = -EINVAL; | |
1434 | if (!addr->sipx_port) | |
1435 | goto out_put; | |
1436 | } | |
1437 | ||
1438 | /* protect IPX system stuff like routing/sap */ | |
1439 | rc = -EACCES; | |
1440 | if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET && | |
1441 | !capable(CAP_NET_ADMIN)) | |
1442 | goto out_put; | |
1443 | ||
1444 | ipxs->port = addr->sipx_port; | |
1445 | ||
1446 | #ifdef CONFIG_IPX_INTERN | |
1447 | if (intrfc == ipx_internal_net) { | |
1448 | /* The source address is to be set explicitly if the | |
1449 | * socket is to be bound on the internal network. If a | |
1450 | * node number 0 was specified, the default is used. | |
1451 | */ | |
1452 | ||
1453 | rc = -EINVAL; | |
1454 | if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN)) | |
1455 | goto out_put; | |
1456 | if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN)) | |
1457 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1458 | else | |
1459 | memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN); | |
1460 | ||
1461 | rc = -EADDRINUSE; | |
1462 | if (ipxitf_find_internal_socket(intrfc, ipxs->node, | |
1463 | ipxs->port)) { | |
1464 | SOCK_DEBUG(sk, | |
1465 | "IPX: bind failed because port %X in use.\n", | |
4833ed09 | 1466 | ntohs(addr->sipx_port)); |
1da177e4 LT |
1467 | goto out_put; |
1468 | } | |
1469 | } else { | |
1470 | /* Source addresses are easy. It must be our | |
1471 | * network:node pair for an interface routed to IPX | |
1472 | * with the ipx routing ioctl() | |
1473 | */ | |
1474 | ||
1475 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1476 | ||
1477 | rc = -EADDRINUSE; | |
1478 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1479 | SOCK_DEBUG(sk, | |
1480 | "IPX: bind failed because port %X in use.\n", | |
4833ed09 | 1481 | ntohs(addr->sipx_port)); |
1da177e4 LT |
1482 | goto out_put; |
1483 | } | |
1484 | } | |
1485 | ||
1486 | #else /* !def CONFIG_IPX_INTERN */ | |
1487 | ||
1488 | /* Source addresses are easy. It must be our network:node pair for | |
1489 | an interface routed to IPX with the ipx routing ioctl() */ | |
1490 | ||
1491 | rc = -EADDRINUSE; | |
1492 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1493 | SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n", | |
1494 | ntohs((int)addr->sipx_port)); | |
1495 | goto out_put; | |
1496 | } | |
1497 | ||
1498 | #endif /* CONFIG_IPX_INTERN */ | |
1499 | ||
1500 | ipxitf_insert_socket(intrfc, sk); | |
1501 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1502 | ||
1503 | rc = 0; | |
1504 | out_put: | |
1505 | ipxitf_put(intrfc); | |
1506 | out: | |
1507 | return rc; | |
1508 | } | |
1509 | ||
83927ba0 AB |
1510 | static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
1511 | { | |
b0d0d915 | 1512 | struct sock *sk = sock->sk; |
83927ba0 AB |
1513 | int rc; |
1514 | ||
b0d0d915 | 1515 | lock_sock(sk); |
83927ba0 | 1516 | rc = __ipx_bind(sock, uaddr, addr_len); |
b0d0d915 | 1517 | release_sock(sk); |
83927ba0 AB |
1518 | |
1519 | return rc; | |
1520 | } | |
1521 | ||
1da177e4 LT |
1522 | static int ipx_connect(struct socket *sock, struct sockaddr *uaddr, |
1523 | int addr_len, int flags) | |
1524 | { | |
1525 | struct sock *sk = sock->sk; | |
1526 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1527 | struct sockaddr_ipx *addr; | |
1528 | int rc = -EINVAL; | |
1529 | struct ipx_route *rt; | |
1530 | ||
1531 | sk->sk_state = TCP_CLOSE; | |
1532 | sock->state = SS_UNCONNECTED; | |
1533 | ||
b0d0d915 | 1534 | lock_sock(sk); |
1da177e4 LT |
1535 | if (addr_len != sizeof(*addr)) |
1536 | goto out; | |
1537 | addr = (struct sockaddr_ipx *)uaddr; | |
1538 | ||
1539 | /* put the autobinding in */ | |
1540 | if (!ipxs->port) { | |
1541 | struct sockaddr_ipx uaddr; | |
1542 | ||
1543 | uaddr.sipx_port = 0; | |
1544 | uaddr.sipx_network = 0; | |
1545 | ||
1546 | #ifdef CONFIG_IPX_INTERN | |
1547 | rc = -ENETDOWN; | |
1548 | if (!ipxs->intrfc) | |
1549 | goto out; /* Someone zonked the iface */ | |
1550 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1551 | IPX_NODE_LEN); | |
1552 | #endif /* CONFIG_IPX_INTERN */ | |
1553 | ||
83927ba0 | 1554 | rc = __ipx_bind(sock, (struct sockaddr *)&uaddr, |
1da177e4 LT |
1555 | sizeof(struct sockaddr_ipx)); |
1556 | if (rc) | |
1557 | goto out; | |
1558 | } | |
1559 | ||
981c0ff6 | 1560 | /* We can either connect to primary network or somewhere |
1da177e4 LT |
1561 | * we can route to */ |
1562 | rt = ipxrtr_lookup(addr->sipx_network); | |
1563 | rc = -ENETUNREACH; | |
1564 | if (!rt && !(!addr->sipx_network && ipx_primary_net)) | |
1565 | goto out; | |
1566 | ||
1567 | ipxs->dest_addr.net = addr->sipx_network; | |
1568 | ipxs->dest_addr.sock = addr->sipx_port; | |
1569 | memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN); | |
1570 | ipxs->type = addr->sipx_type; | |
1571 | ||
1572 | if (sock->type == SOCK_DGRAM) { | |
1573 | sock->state = SS_CONNECTED; | |
1574 | sk->sk_state = TCP_ESTABLISHED; | |
1575 | } | |
1576 | ||
1577 | if (rt) | |
1578 | ipxrtr_put(rt); | |
1579 | rc = 0; | |
1580 | out: | |
b0d0d915 | 1581 | release_sock(sk); |
1da177e4 LT |
1582 | return rc; |
1583 | } | |
1584 | ||
1585 | ||
1586 | static int ipx_getname(struct socket *sock, struct sockaddr *uaddr, | |
1587 | int *uaddr_len, int peer) | |
1588 | { | |
1589 | struct ipx_address *addr; | |
1590 | struct sockaddr_ipx sipx; | |
1591 | struct sock *sk = sock->sk; | |
1592 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1593 | int rc; | |
1594 | ||
1595 | *uaddr_len = sizeof(struct sockaddr_ipx); | |
1596 | ||
b0d0d915 | 1597 | lock_sock(sk); |
1da177e4 LT |
1598 | if (peer) { |
1599 | rc = -ENOTCONN; | |
1600 | if (sk->sk_state != TCP_ESTABLISHED) | |
1601 | goto out; | |
1602 | ||
1603 | addr = &ipxs->dest_addr; | |
1604 | sipx.sipx_network = addr->net; | |
1605 | sipx.sipx_port = addr->sock; | |
1606 | memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN); | |
1607 | } else { | |
1608 | if (ipxs->intrfc) { | |
1609 | sipx.sipx_network = ipxs->intrfc->if_netnum; | |
1610 | #ifdef CONFIG_IPX_INTERN | |
1611 | memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN); | |
1612 | #else | |
1613 | memcpy(sipx.sipx_node, ipxs->intrfc->if_node, | |
1614 | IPX_NODE_LEN); | |
1615 | #endif /* CONFIG_IPX_INTERN */ | |
1616 | ||
1617 | } else { | |
1618 | sipx.sipx_network = 0; | |
1619 | memset(sipx.sipx_node, '\0', IPX_NODE_LEN); | |
1620 | } | |
1621 | ||
1622 | sipx.sipx_port = ipxs->port; | |
1623 | } | |
1624 | ||
1625 | sipx.sipx_family = AF_IPX; | |
1626 | sipx.sipx_type = ipxs->type; | |
1627 | sipx.sipx_zero = 0; | |
1628 | memcpy(uaddr, &sipx, sizeof(sipx)); | |
1629 | ||
1630 | rc = 0; | |
1631 | out: | |
b0d0d915 | 1632 | release_sock(sk); |
1da177e4 LT |
1633 | return rc; |
1634 | } | |
1635 | ||
f2ccd8fa | 1636 | static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
1637 | { |
1638 | /* NULL here for pt means the packet was looped back */ | |
1639 | struct ipx_interface *intrfc; | |
1640 | struct ipxhdr *ipx; | |
1641 | u16 ipx_pktsize; | |
1642 | int rc = 0; | |
981c0ff6 | 1643 | |
721499e8 | 1644 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
1645 | goto drop; |
1646 | ||
981c0ff6 YH |
1647 | /* Not ours */ |
1648 | if (skb->pkt_type == PACKET_OTHERHOST) | |
1649 | goto drop; | |
1da177e4 LT |
1650 | |
1651 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
1652 | goto out; | |
1653 | ||
7b1ba8de SH |
1654 | if (!pskb_may_pull(skb, sizeof(struct ipxhdr))) |
1655 | goto drop; | |
1656 | ||
fff64257 | 1657 | ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize); |
981c0ff6 | 1658 | |
1da177e4 | 1659 | /* Too small or invalid header? */ |
8b5cc5ef SH |
1660 | if (ipx_pktsize < sizeof(struct ipxhdr) || |
1661 | !pskb_may_pull(skb, ipx_pktsize)) | |
1da177e4 | 1662 | goto drop; |
981c0ff6 | 1663 | |
7b1ba8de | 1664 | ipx = ipx_hdr(skb); |
1da177e4 LT |
1665 | if (ipx->ipx_checksum != IPX_NO_CHECKSUM && |
1666 | ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize)) | |
1667 | goto drop; | |
1668 | ||
1669 | IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl; | |
1670 | IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net; | |
1671 | IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net; | |
1672 | ||
1673 | /* Determine what local ipx endpoint this is */ | |
1674 | intrfc = ipxitf_find_using_phys(dev, pt->type); | |
1675 | if (!intrfc) { | |
1676 | if (ipxcfg_auto_create_interfaces && | |
4833ed09 | 1677 | IPX_SKB_CB(skb)->ipx_dest_net) { |
1da177e4 LT |
1678 | intrfc = ipxitf_auto_create(dev, pt->type); |
1679 | if (intrfc) | |
1680 | ipxitf_hold(intrfc); | |
1681 | } | |
1682 | ||
1683 | if (!intrfc) /* Not one of ours */ | |
1684 | /* or invalid packet for auto creation */ | |
1685 | goto drop; | |
1686 | } | |
1687 | ||
1688 | rc = ipxitf_rcv(intrfc, skb); | |
1689 | ipxitf_put(intrfc); | |
1690 | goto out; | |
1691 | drop: | |
1692 | kfree_skb(skb); | |
1693 | out: | |
1694 | return rc; | |
1695 | } | |
1696 | ||
1697 | static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1698 | struct msghdr *msg, size_t len) | |
1699 | { | |
1700 | struct sock *sk = sock->sk; | |
1701 | struct ipx_sock *ipxs = ipx_sk(sk); | |
342dfc30 | 1702 | DECLARE_SOCKADDR(struct sockaddr_ipx *, usipx, msg->msg_name); |
1da177e4 LT |
1703 | struct sockaddr_ipx local_sipx; |
1704 | int rc = -EINVAL; | |
1705 | int flags = msg->msg_flags; | |
1706 | ||
b0d0d915 | 1707 | lock_sock(sk); |
1da177e4 LT |
1708 | /* Socket gets bound below anyway */ |
1709 | /* if (sk->sk_zapped) | |
1710 | return -EIO; */ /* Socket not bound */ | |
1711 | if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) | |
1712 | goto out; | |
1713 | ||
1714 | /* Max possible packet size limited by 16 bit pktsize in header */ | |
1715 | if (len >= 65535 - sizeof(struct ipxhdr)) | |
1716 | goto out; | |
1717 | ||
1718 | if (usipx) { | |
1719 | if (!ipxs->port) { | |
1720 | struct sockaddr_ipx uaddr; | |
1721 | ||
1722 | uaddr.sipx_port = 0; | |
1723 | uaddr.sipx_network = 0; | |
1724 | #ifdef CONFIG_IPX_INTERN | |
1725 | rc = -ENETDOWN; | |
1726 | if (!ipxs->intrfc) | |
1727 | goto out; /* Someone zonked the iface */ | |
1728 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1729 | IPX_NODE_LEN); | |
1730 | #endif | |
83927ba0 | 1731 | rc = __ipx_bind(sock, (struct sockaddr *)&uaddr, |
1da177e4 LT |
1732 | sizeof(struct sockaddr_ipx)); |
1733 | if (rc) | |
1734 | goto out; | |
1735 | } | |
1736 | ||
1737 | rc = -EINVAL; | |
1738 | if (msg->msg_namelen < sizeof(*usipx) || | |
1739 | usipx->sipx_family != AF_IPX) | |
1740 | goto out; | |
1741 | } else { | |
1742 | rc = -ENOTCONN; | |
1743 | if (sk->sk_state != TCP_ESTABLISHED) | |
1744 | goto out; | |
1745 | ||
1746 | usipx = &local_sipx; | |
1747 | usipx->sipx_family = AF_IPX; | |
1748 | usipx->sipx_type = ipxs->type; | |
1749 | usipx->sipx_port = ipxs->dest_addr.sock; | |
1750 | usipx->sipx_network = ipxs->dest_addr.net; | |
1751 | memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN); | |
1752 | } | |
1753 | ||
1754 | rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len, | |
1755 | flags & MSG_DONTWAIT); | |
1756 | if (rc >= 0) | |
1757 | rc = len; | |
1758 | out: | |
b0d0d915 | 1759 | release_sock(sk); |
1da177e4 LT |
1760 | return rc; |
1761 | } | |
1762 | ||
1763 | ||
1764 | static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1765 | struct msghdr *msg, size_t size, int flags) | |
1766 | { | |
1767 | struct sock *sk = sock->sk; | |
1768 | struct ipx_sock *ipxs = ipx_sk(sk); | |
342dfc30 | 1769 | DECLARE_SOCKADDR(struct sockaddr_ipx *, sipx, msg->msg_name); |
1da177e4 LT |
1770 | struct ipxhdr *ipx = NULL; |
1771 | struct sk_buff *skb; | |
1772 | int copied, rc; | |
1773 | ||
b0d0d915 | 1774 | lock_sock(sk); |
1da177e4 LT |
1775 | /* put the autobinding in */ |
1776 | if (!ipxs->port) { | |
1777 | struct sockaddr_ipx uaddr; | |
1778 | ||
1779 | uaddr.sipx_port = 0; | |
1780 | uaddr.sipx_network = 0; | |
1781 | ||
1782 | #ifdef CONFIG_IPX_INTERN | |
1783 | rc = -ENETDOWN; | |
1784 | if (!ipxs->intrfc) | |
1785 | goto out; /* Someone zonked the iface */ | |
1786 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN); | |
1787 | #endif /* CONFIG_IPX_INTERN */ | |
1788 | ||
83927ba0 | 1789 | rc = __ipx_bind(sock, (struct sockaddr *)&uaddr, |
1da177e4 LT |
1790 | sizeof(struct sockaddr_ipx)); |
1791 | if (rc) | |
1792 | goto out; | |
1793 | } | |
981c0ff6 | 1794 | |
1da177e4 LT |
1795 | rc = -ENOTCONN; |
1796 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1797 | goto out; | |
1798 | ||
1799 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1800 | flags & MSG_DONTWAIT, &rc); | |
1801 | if (!skb) | |
1802 | goto out; | |
1803 | ||
1804 | ipx = ipx_hdr(skb); | |
1805 | copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr); | |
1806 | if (copied > size) { | |
1807 | copied = size; | |
1808 | msg->msg_flags |= MSG_TRUNC; | |
1809 | } | |
1810 | ||
1811 | rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov, | |
1812 | copied); | |
1813 | if (rc) | |
1814 | goto out_free; | |
b7aa0bf7 ED |
1815 | if (skb->tstamp.tv64) |
1816 | sk->sk_stamp = skb->tstamp; | |
1da177e4 | 1817 | |
1da177e4 LT |
1818 | if (sipx) { |
1819 | sipx->sipx_family = AF_IPX; | |
1820 | sipx->sipx_port = ipx->ipx_source.sock; | |
1821 | memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN); | |
1822 | sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net; | |
1823 | sipx->sipx_type = ipx->ipx_type; | |
1824 | sipx->sipx_zero = 0; | |
f3d33426 | 1825 | msg->msg_namelen = sizeof(*sipx); |
1da177e4 LT |
1826 | } |
1827 | rc = copied; | |
1828 | ||
1829 | out_free: | |
1830 | skb_free_datagram(sk, skb); | |
1831 | out: | |
b0d0d915 | 1832 | release_sock(sk); |
1da177e4 LT |
1833 | return rc; |
1834 | } | |
1835 | ||
1836 | ||
1837 | static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1838 | { | |
1839 | int rc = 0; | |
1840 | long amount = 0; | |
1841 | struct sock *sk = sock->sk; | |
1842 | void __user *argp = (void __user *)arg; | |
1843 | ||
b0d0d915 | 1844 | lock_sock(sk); |
1da177e4 LT |
1845 | switch (cmd) { |
1846 | case TIOCOUTQ: | |
31e6d363 | 1847 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1da177e4 LT |
1848 | if (amount < 0) |
1849 | amount = 0; | |
1850 | rc = put_user(amount, (int __user *)argp); | |
1851 | break; | |
1852 | case TIOCINQ: { | |
1853 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); | |
1854 | /* These two are safe on a single CPU system as only | |
1855 | * user tasks fiddle here */ | |
1856 | if (skb) | |
1857 | amount = skb->len - sizeof(struct ipxhdr); | |
1858 | rc = put_user(amount, (int __user *)argp); | |
1859 | break; | |
1860 | } | |
1861 | case SIOCADDRT: | |
1862 | case SIOCDELRT: | |
1863 | rc = -EPERM; | |
1864 | if (capable(CAP_NET_ADMIN)) | |
1865 | rc = ipxrtr_ioctl(cmd, argp); | |
1866 | break; | |
1867 | case SIOCSIFADDR: | |
1868 | case SIOCAIPXITFCRT: | |
1869 | case SIOCAIPXPRISLT: | |
1870 | rc = -EPERM; | |
1871 | if (!capable(CAP_NET_ADMIN)) | |
1872 | break; | |
1873 | case SIOCGIFADDR: | |
1874 | rc = ipxitf_ioctl(cmd, argp); | |
1875 | break; | |
1876 | case SIOCIPXCFGDATA: | |
1877 | rc = ipxcfg_get_config_data(argp); | |
1878 | break; | |
1879 | case SIOCIPXNCPCONN: | |
1880 | /* | |
1881 | * This socket wants to take care of the NCP connection | |
1882 | * handed to us in arg. | |
1883 | */ | |
981c0ff6 YH |
1884 | rc = -EPERM; |
1885 | if (!capable(CAP_NET_ADMIN)) | |
1da177e4 LT |
1886 | break; |
1887 | rc = get_user(ipx_sk(sk)->ipx_ncp_conn, | |
1888 | (const unsigned short __user *)argp); | |
1889 | break; | |
1890 | case SIOCGSTAMP: | |
32e9072b | 1891 | rc = sock_get_timestamp(sk, argp); |
1da177e4 LT |
1892 | break; |
1893 | case SIOCGIFDSTADDR: | |
1894 | case SIOCSIFDSTADDR: | |
1895 | case SIOCGIFBRDADDR: | |
1896 | case SIOCSIFBRDADDR: | |
1897 | case SIOCGIFNETMASK: | |
1898 | case SIOCSIFNETMASK: | |
1899 | rc = -EINVAL; | |
1900 | break; | |
1901 | default: | |
b5e5fa5e | 1902 | rc = -ENOIOCTLCMD; |
1da177e4 LT |
1903 | break; |
1904 | } | |
b0d0d915 | 1905 | release_sock(sk); |
1da177e4 LT |
1906 | |
1907 | return rc; | |
1908 | } | |
1909 | ||
f6c90b71 PV |
1910 | |
1911 | #ifdef CONFIG_COMPAT | |
1912 | static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1913 | { | |
1914 | /* | |
1915 | * These 4 commands use same structure on 32bit and 64bit. Rest of IPX | |
1916 | * commands is handled by generic ioctl code. As these commands are | |
1917 | * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic | |
1918 | * code. | |
1919 | */ | |
1920 | switch (cmd) { | |
1921 | case SIOCAIPXITFCRT: | |
1922 | case SIOCAIPXPRISLT: | |
1923 | case SIOCIPXCFGDATA: | |
1924 | case SIOCIPXNCPCONN: | |
1925 | return ipx_ioctl(sock, cmd, arg); | |
1926 | default: | |
1927 | return -ENOIOCTLCMD; | |
1928 | } | |
1929 | } | |
1930 | #endif | |
1931 | ||
1932 | ||
1da177e4 LT |
1933 | /* |
1934 | * Socket family declarations | |
1935 | */ | |
1936 | ||
ec1b4cf7 | 1937 | static const struct net_proto_family ipx_family_ops = { |
1da177e4 LT |
1938 | .family = PF_IPX, |
1939 | .create = ipx_create, | |
1940 | .owner = THIS_MODULE, | |
1941 | }; | |
1942 | ||
83927ba0 | 1943 | static const struct proto_ops ipx_dgram_ops = { |
1da177e4 LT |
1944 | .family = PF_IPX, |
1945 | .owner = THIS_MODULE, | |
1946 | .release = ipx_release, | |
1947 | .bind = ipx_bind, | |
1948 | .connect = ipx_connect, | |
1949 | .socketpair = sock_no_socketpair, | |
1950 | .accept = sock_no_accept, | |
1951 | .getname = ipx_getname, | |
b0d0d915 | 1952 | .poll = datagram_poll, |
1da177e4 | 1953 | .ioctl = ipx_ioctl, |
f6c90b71 PV |
1954 | #ifdef CONFIG_COMPAT |
1955 | .compat_ioctl = ipx_compat_ioctl, | |
1956 | #endif | |
1da177e4 LT |
1957 | .listen = sock_no_listen, |
1958 | .shutdown = sock_no_shutdown, /* FIXME: support shutdown */ | |
1959 | .setsockopt = ipx_setsockopt, | |
1960 | .getsockopt = ipx_getsockopt, | |
1961 | .sendmsg = ipx_sendmsg, | |
1962 | .recvmsg = ipx_recvmsg, | |
1963 | .mmap = sock_no_mmap, | |
1964 | .sendpage = sock_no_sendpage, | |
1965 | }; | |
1966 | ||
7546dd97 | 1967 | static struct packet_type ipx_8023_packet_type __read_mostly = { |
09640e63 | 1968 | .type = cpu_to_be16(ETH_P_802_3), |
1da177e4 LT |
1969 | .func = ipx_rcv, |
1970 | }; | |
1971 | ||
7546dd97 | 1972 | static struct packet_type ipx_dix_packet_type __read_mostly = { |
09640e63 | 1973 | .type = cpu_to_be16(ETH_P_IPX), |
1da177e4 LT |
1974 | .func = ipx_rcv, |
1975 | }; | |
1976 | ||
1977 | static struct notifier_block ipx_dev_notifier = { | |
1978 | .notifier_call = ipxitf_device_event, | |
1979 | }; | |
1980 | ||
fa665ccf SH |
1981 | static const unsigned char ipx_8022_type = 0xE0; |
1982 | static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 }; | |
1983 | static const char ipx_EII_err_msg[] __initconst = | |
1da177e4 | 1984 | KERN_CRIT "IPX: Unable to register with Ethernet II\n"; |
fa665ccf | 1985 | static const char ipx_8023_err_msg[] __initconst = |
1da177e4 | 1986 | KERN_CRIT "IPX: Unable to register with 802.3\n"; |
fa665ccf | 1987 | static const char ipx_llc_err_msg[] __initconst = |
1da177e4 | 1988 | KERN_CRIT "IPX: Unable to register with 802.2\n"; |
fa665ccf | 1989 | static const char ipx_snap_err_msg[] __initconst = |
1da177e4 LT |
1990 | KERN_CRIT "IPX: Unable to register with SNAP\n"; |
1991 | ||
1992 | static int __init ipx_init(void) | |
1993 | { | |
1994 | int rc = proto_register(&ipx_proto, 1); | |
1995 | ||
1996 | if (rc != 0) | |
1997 | goto out; | |
1998 | ||
1999 | sock_register(&ipx_family_ops); | |
2000 | ||
2001 | pEII_datalink = make_EII_client(); | |
2002 | if (pEII_datalink) | |
2003 | dev_add_pack(&ipx_dix_packet_type); | |
2004 | else | |
2005 | printk(ipx_EII_err_msg); | |
2006 | ||
2007 | p8023_datalink = make_8023_client(); | |
2008 | if (p8023_datalink) | |
2009 | dev_add_pack(&ipx_8023_packet_type); | |
2010 | else | |
2011 | printk(ipx_8023_err_msg); | |
2012 | ||
2013 | p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv); | |
2014 | if (!p8022_datalink) | |
2015 | printk(ipx_llc_err_msg); | |
2016 | ||
2017 | pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv); | |
2018 | if (!pSNAP_datalink) | |
2019 | printk(ipx_snap_err_msg); | |
2020 | ||
2021 | register_netdevice_notifier(&ipx_dev_notifier); | |
2022 | ipx_register_sysctl(); | |
2023 | ipx_proc_init(); | |
2024 | out: | |
2025 | return rc; | |
2026 | } | |
2027 | ||
2028 | static void __exit ipx_proto_finito(void) | |
2029 | { | |
2030 | ipx_proc_exit(); | |
2031 | ipx_unregister_sysctl(); | |
2032 | ||
2033 | unregister_netdevice_notifier(&ipx_dev_notifier); | |
2034 | ||
2035 | ipxitf_cleanup(); | |
2036 | ||
1539b98b JB |
2037 | if (pSNAP_datalink) { |
2038 | unregister_snap_client(pSNAP_datalink); | |
2039 | pSNAP_datalink = NULL; | |
2040 | } | |
1da177e4 | 2041 | |
1539b98b JB |
2042 | if (p8022_datalink) { |
2043 | unregister_8022_client(p8022_datalink); | |
2044 | p8022_datalink = NULL; | |
2045 | } | |
1da177e4 LT |
2046 | |
2047 | dev_remove_pack(&ipx_8023_packet_type); | |
1539b98b JB |
2048 | if (p8023_datalink) { |
2049 | destroy_8023_client(p8023_datalink); | |
2050 | p8023_datalink = NULL; | |
2051 | } | |
1da177e4 LT |
2052 | |
2053 | dev_remove_pack(&ipx_dix_packet_type); | |
1539b98b JB |
2054 | if (pEII_datalink) { |
2055 | destroy_EII_client(pEII_datalink); | |
2056 | pEII_datalink = NULL; | |
2057 | } | |
1da177e4 LT |
2058 | |
2059 | proto_unregister(&ipx_proto); | |
2060 | sock_unregister(ipx_family_ops.family); | |
2061 | } | |
2062 | ||
2063 | module_init(ipx_init); | |
2064 | module_exit(ipx_proto_finito); | |
2065 | MODULE_LICENSE("GPL"); | |
2066 | MODULE_ALIAS_NETPROTO(PF_IPX); |