Commit | Line | Data |
---|---|---|
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 | 44 | #include <linux/skbuff.h> |
405f5571 | 45 | #include <linux/smp_lock.h> |
1da177e4 LT |
46 | #include <linux/socket.h> |
47 | #include <linux/sockios.h> | |
48 | #include <linux/string.h> | |
1da177e4 LT |
49 | #include <linux/types.h> |
50 | #include <linux/termios.h> | |
51 | ||
52 | #include <net/ipx.h> | |
53 | #include <net/p8022.h> | |
54 | #include <net/psnap.h> | |
55 | #include <net/sock.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 | ||
4833ed09 | 88 | extern int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc, |
1da177e4 LT |
89 | unsigned char *node); |
90 | extern void ipxrtr_del_routes(struct ipx_interface *intrfc); | |
91 | extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, | |
0479ea0e | 92 | struct iovec *iov, size_t len, int noblock); |
1da177e4 | 93 | extern int ipxrtr_route_skb(struct sk_buff *skb); |
4833ed09 | 94 | extern struct ipx_route *ipxrtr_lookup(__be32 net); |
1da177e4 LT |
95 | extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg); |
96 | ||
1da177e4 LT |
97 | struct ipx_interface *ipx_interfaces_head(void) |
98 | { | |
99 | struct ipx_interface *rc = NULL; | |
100 | ||
101 | if (!list_empty(&ipx_interfaces)) | |
102 | rc = list_entry(ipx_interfaces.next, | |
103 | struct ipx_interface, node); | |
104 | return rc; | |
105 | } | |
106 | ||
107 | static void ipxcfg_set_auto_select(char val) | |
108 | { | |
109 | ipxcfg_auto_select_primary = val; | |
110 | if (val && !ipx_primary_net) | |
111 | ipx_primary_net = ipx_interfaces_head(); | |
112 | } | |
113 | ||
114 | static int ipxcfg_get_config_data(struct ipx_config_data __user *arg) | |
115 | { | |
116 | struct ipx_config_data vals; | |
117 | ||
118 | vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces; | |
119 | vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary; | |
120 | ||
121 | return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0; | |
122 | } | |
123 | ||
124 | /* | |
125 | * Note: Sockets may not be removed _during_ an interrupt or inet_bh | |
126 | * handler using this technique. They can be added although we do not | |
127 | * use this facility. | |
128 | */ | |
129 | ||
130 | static void ipx_remove_socket(struct sock *sk) | |
131 | { | |
132 | /* Determine interface with which socket is associated */ | |
133 | struct ipx_interface *intrfc = ipx_sk(sk)->intrfc; | |
134 | ||
135 | if (!intrfc) | |
136 | goto out; | |
137 | ||
138 | ipxitf_hold(intrfc); | |
139 | spin_lock_bh(&intrfc->if_sklist_lock); | |
140 | sk_del_node_init(sk); | |
141 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
142 | ipxitf_put(intrfc); | |
143 | out: | |
144 | return; | |
145 | } | |
146 | ||
147 | static void ipx_destroy_socket(struct sock *sk) | |
148 | { | |
149 | ipx_remove_socket(sk); | |
150 | skb_queue_purge(&sk->sk_receive_queue); | |
c2b42336 | 151 | sk_refcnt_debug_dec(sk); |
1da177e4 LT |
152 | sock_put(sk); |
153 | } | |
154 | ||
981c0ff6 | 155 | /* |
1da177e4 LT |
156 | * The following code is used to support IPX Interfaces (IPXITF). An |
157 | * IPX interface is defined by a physical device and a frame type. | |
158 | */ | |
159 | ||
160 | /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */ | |
161 | ||
162 | static void ipxitf_clear_primary_net(void) | |
163 | { | |
164 | ipx_primary_net = NULL; | |
165 | if (ipxcfg_auto_select_primary) | |
166 | ipx_primary_net = ipx_interfaces_head(); | |
167 | } | |
168 | ||
169 | static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev, | |
4833ed09 | 170 | __be16 datalink) |
1da177e4 LT |
171 | { |
172 | struct ipx_interface *i; | |
173 | ||
174 | list_for_each_entry(i, &ipx_interfaces, node) | |
175 | if (i->if_dev == dev && i->if_dlink_type == datalink) | |
176 | goto out; | |
177 | i = NULL; | |
178 | out: | |
179 | return i; | |
180 | } | |
181 | ||
182 | static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev, | |
4833ed09 | 183 | __be16 datalink) |
1da177e4 LT |
184 | { |
185 | struct ipx_interface *i; | |
186 | ||
187 | spin_lock_bh(&ipx_interfaces_lock); | |
188 | i = __ipxitf_find_using_phys(dev, datalink); | |
189 | if (i) | |
190 | ipxitf_hold(i); | |
191 | spin_unlock_bh(&ipx_interfaces_lock); | |
192 | return i; | |
193 | } | |
194 | ||
4833ed09 | 195 | struct ipx_interface *ipxitf_find_using_net(__be32 net) |
1da177e4 LT |
196 | { |
197 | struct ipx_interface *i; | |
198 | ||
199 | spin_lock_bh(&ipx_interfaces_lock); | |
200 | if (net) { | |
201 | list_for_each_entry(i, &ipx_interfaces, node) | |
202 | if (i->if_netnum == net) | |
203 | goto hold; | |
204 | i = NULL; | |
205 | goto unlock; | |
206 | } | |
207 | ||
208 | i = ipx_primary_net; | |
209 | if (i) | |
210 | hold: | |
211 | ipxitf_hold(i); | |
212 | unlock: | |
213 | spin_unlock_bh(&ipx_interfaces_lock); | |
214 | return i; | |
215 | } | |
216 | ||
217 | /* Sockets are bound to a particular IPX interface. */ | |
218 | static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk) | |
219 | { | |
220 | ipxitf_hold(intrfc); | |
221 | spin_lock_bh(&intrfc->if_sklist_lock); | |
222 | ipx_sk(sk)->intrfc = intrfc; | |
223 | sk_add_node(sk, &intrfc->if_sklist); | |
224 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
225 | ipxitf_put(intrfc); | |
226 | } | |
227 | ||
228 | /* caller must hold intrfc->if_sklist_lock */ | |
229 | static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc, | |
4833ed09 | 230 | __be16 port) |
1da177e4 LT |
231 | { |
232 | struct sock *s; | |
233 | struct hlist_node *node; | |
234 | ||
235 | sk_for_each(s, node, &intrfc->if_sklist) | |
236 | if (ipx_sk(s)->port == port) | |
237 | goto found; | |
238 | s = NULL; | |
239 | found: | |
240 | return s; | |
241 | } | |
242 | ||
243 | /* caller must hold a reference to intrfc */ | |
244 | static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc, | |
4833ed09 | 245 | __be16 port) |
1da177e4 LT |
246 | { |
247 | struct sock *s; | |
248 | ||
249 | spin_lock_bh(&intrfc->if_sklist_lock); | |
250 | s = __ipxitf_find_socket(intrfc, port); | |
251 | if (s) | |
252 | sock_hold(s); | |
253 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
254 | ||
255 | return s; | |
256 | } | |
257 | ||
258 | #ifdef CONFIG_IPX_INTERN | |
259 | static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc, | |
260 | unsigned char *ipx_node, | |
4833ed09 | 261 | __be16 port) |
1da177e4 LT |
262 | { |
263 | struct sock *s; | |
264 | struct hlist_node *node; | |
265 | ||
266 | ipxitf_hold(intrfc); | |
267 | spin_lock_bh(&intrfc->if_sklist_lock); | |
268 | ||
269 | sk_for_each(s, node, &intrfc->if_sklist) { | |
270 | struct ipx_sock *ipxs = ipx_sk(s); | |
271 | ||
272 | if (ipxs->port == port && | |
273 | !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN)) | |
274 | goto found; | |
275 | } | |
276 | s = NULL; | |
277 | found: | |
278 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
279 | ipxitf_put(intrfc); | |
280 | return s; | |
281 | } | |
282 | #endif | |
283 | ||
284 | static void __ipxitf_down(struct ipx_interface *intrfc) | |
285 | { | |
286 | struct sock *s; | |
287 | struct hlist_node *node, *t; | |
288 | ||
289 | /* Delete all routes associated with this interface */ | |
290 | ipxrtr_del_routes(intrfc); | |
291 | ||
292 | spin_lock_bh(&intrfc->if_sklist_lock); | |
293 | /* error sockets */ | |
294 | sk_for_each_safe(s, node, t, &intrfc->if_sklist) { | |
295 | struct ipx_sock *ipxs = ipx_sk(s); | |
296 | ||
297 | s->sk_err = ENOLINK; | |
298 | s->sk_error_report(s); | |
299 | ipxs->intrfc = NULL; | |
300 | ipxs->port = 0; | |
301 | sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */ | |
302 | sk_del_node_init(s); | |
303 | } | |
304 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
305 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
306 | ||
307 | /* remove this interface from list */ | |
308 | list_del(&intrfc->node); | |
309 | ||
310 | /* remove this interface from *special* networks */ | |
311 | if (intrfc == ipx_primary_net) | |
312 | ipxitf_clear_primary_net(); | |
313 | if (intrfc == ipx_internal_net) | |
314 | ipx_internal_net = NULL; | |
315 | ||
316 | if (intrfc->if_dev) | |
317 | dev_put(intrfc->if_dev); | |
318 | kfree(intrfc); | |
319 | } | |
320 | ||
321 | void ipxitf_down(struct ipx_interface *intrfc) | |
322 | { | |
323 | spin_lock_bh(&ipx_interfaces_lock); | |
324 | __ipxitf_down(intrfc); | |
325 | spin_unlock_bh(&ipx_interfaces_lock); | |
326 | } | |
327 | ||
328 | static __inline__ void __ipxitf_put(struct ipx_interface *intrfc) | |
329 | { | |
330 | if (atomic_dec_and_test(&intrfc->refcnt)) | |
331 | __ipxitf_down(intrfc); | |
332 | } | |
333 | ||
334 | static int ipxitf_device_event(struct notifier_block *notifier, | |
335 | unsigned long event, void *ptr) | |
336 | { | |
337 | struct net_device *dev = ptr; | |
338 | struct ipx_interface *i, *tmp; | |
339 | ||
721499e8 | 340 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
341 | return NOTIFY_DONE; |
342 | ||
1da177e4 LT |
343 | if (event != NETDEV_DOWN && event != NETDEV_UP) |
344 | goto out; | |
345 | ||
346 | spin_lock_bh(&ipx_interfaces_lock); | |
347 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) | |
348 | if (i->if_dev == dev) { | |
349 | if (event == NETDEV_UP) | |
350 | ipxitf_hold(i); | |
351 | else | |
352 | __ipxitf_put(i); | |
353 | } | |
354 | spin_unlock_bh(&ipx_interfaces_lock); | |
355 | out: | |
356 | return NOTIFY_DONE; | |
357 | } | |
358 | ||
359 | ||
360 | static __exit void ipxitf_cleanup(void) | |
361 | { | |
362 | struct ipx_interface *i, *tmp; | |
363 | ||
364 | spin_lock_bh(&ipx_interfaces_lock); | |
981c0ff6 | 365 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) |
1da177e4 LT |
366 | __ipxitf_put(i); |
367 | spin_unlock_bh(&ipx_interfaces_lock); | |
368 | } | |
369 | ||
370 | static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb) | |
371 | { | |
372 | if (sock_queue_rcv_skb(sock, skb) < 0) | |
373 | kfree_skb(skb); | |
374 | } | |
375 | ||
376 | /* | |
377 | * On input skb->sk is NULL. Nobody is charged for the memory. | |
378 | */ | |
379 | ||
380 | /* caller must hold a reference to intrfc */ | |
381 | ||
382 | #ifdef CONFIG_IPX_INTERN | |
383 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
384 | struct sk_buff *skb, int copy) | |
385 | { | |
386 | struct ipxhdr *ipx = ipx_hdr(skb); | |
387 | int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node, | |
388 | IPX_NODE_LEN); | |
389 | struct sock *s; | |
390 | struct hlist_node *node; | |
391 | int rc; | |
392 | ||
393 | spin_lock_bh(&intrfc->if_sklist_lock); | |
394 | ||
395 | sk_for_each(s, node, &intrfc->if_sklist) { | |
396 | struct ipx_sock *ipxs = ipx_sk(s); | |
397 | ||
398 | if (ipxs->port == ipx->ipx_dest.sock && | |
399 | (is_broadcast || !memcmp(ipx->ipx_dest.node, | |
400 | ipxs->node, IPX_NODE_LEN))) { | |
401 | /* We found a socket to which to send */ | |
402 | struct sk_buff *skb1; | |
403 | ||
404 | if (copy) { | |
405 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
406 | rc = -ENOMEM; | |
407 | if (!skb1) | |
408 | goto out; | |
409 | } else { | |
410 | skb1 = skb; | |
411 | copy = 1; /* skb may only be used once */ | |
412 | } | |
413 | ipxitf_def_skb_handler(s, skb1); | |
414 | ||
415 | /* On an external interface, one socket can listen */ | |
416 | if (intrfc != ipx_internal_net) | |
417 | break; | |
418 | } | |
419 | } | |
420 | ||
421 | /* skb was solely for us, and we did not make a copy, so free it. */ | |
422 | if (!copy) | |
423 | kfree_skb(skb); | |
424 | ||
425 | rc = 0; | |
426 | out: | |
427 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
428 | return rc; | |
429 | } | |
430 | #else | |
431 | static struct sock *ncp_connection_hack(struct ipx_interface *intrfc, | |
432 | struct ipxhdr *ipx) | |
433 | { | |
434 | /* The packet's target is a NCP connection handler. We want to hand it | |
435 | * to the correct socket directly within the kernel, so that the | |
436 | * mars_nwe packet distribution process does not have to do it. Here we | |
437 | * only care about NCP and BURST packets. | |
438 | * | |
439 | * You might call this a hack, but believe me, you do not want a | |
440 | * complete NCP layer in the kernel, and this is VERY fast as well. */ | |
441 | struct sock *sk = NULL; | |
981c0ff6 | 442 | int connection = 0; |
1da177e4 LT |
443 | u8 *ncphdr = (u8 *)(ipx + 1); |
444 | ||
981c0ff6 | 445 | if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */ |
1da177e4 LT |
446 | connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3); |
447 | else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */ | |
448 | connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8); | |
449 | ||
450 | if (connection) { | |
451 | struct hlist_node *node; | |
452 | /* Now we have to look for a special NCP connection handling | |
453 | * socket. Only these sockets have ipx_ncp_conn != 0, set by | |
454 | * SIOCIPXNCPCONN. */ | |
455 | spin_lock_bh(&intrfc->if_sklist_lock); | |
456 | sk_for_each(sk, node, &intrfc->if_sklist) | |
457 | if (ipx_sk(sk)->ipx_ncp_conn == connection) { | |
458 | sock_hold(sk); | |
459 | goto found; | |
460 | } | |
461 | sk = NULL; | |
462 | found: | |
463 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
464 | } | |
465 | return sk; | |
466 | } | |
467 | ||
468 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
469 | struct sk_buff *skb, int copy) | |
470 | { | |
471 | struct ipxhdr *ipx = ipx_hdr(skb); | |
472 | struct sock *sock1 = NULL, *sock2 = NULL; | |
473 | struct sk_buff *skb1 = NULL, *skb2 = NULL; | |
474 | int rc; | |
475 | ||
476 | if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451) | |
477 | sock1 = ncp_connection_hack(intrfc, ipx); | |
981c0ff6 | 478 | if (!sock1) |
1da177e4 LT |
479 | /* No special socket found, forward the packet the normal way */ |
480 | sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock); | |
481 | ||
482 | /* | |
483 | * We need to check if there is a primary net and if | |
484 | * this is addressed to one of the *SPECIAL* sockets because | |
485 | * these need to be propagated to the primary net. | |
486 | * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and | |
487 | * 0x456(Diagnostic). | |
488 | */ | |
489 | ||
490 | if (ipx_primary_net && intrfc != ipx_primary_net) { | |
491 | const int dsock = ntohs(ipx->ipx_dest.sock); | |
492 | ||
493 | if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456) | |
494 | /* The appropriate thing to do here is to dup the | |
495 | * packet and route to the primary net interface via | |
496 | * ipxitf_send; however, we'll cheat and just demux it | |
497 | * here. */ | |
498 | sock2 = ipxitf_find_socket(ipx_primary_net, | |
499 | ipx->ipx_dest.sock); | |
500 | } | |
501 | ||
502 | /* | |
503 | * If there is nothing to do return. The kfree will cancel any charging. | |
504 | */ | |
505 | rc = 0; | |
506 | if (!sock1 && !sock2) { | |
507 | if (!copy) | |
508 | kfree_skb(skb); | |
509 | goto out; | |
510 | } | |
511 | ||
512 | /* | |
513 | * This next segment of code is a little awkward, but it sets it up | |
514 | * so that the appropriate number of copies of the SKB are made and | |
515 | * that skb1 and skb2 point to it (them) so that it (they) can be | |
516 | * demuxed to sock1 and/or sock2. If we are unable to make enough | |
517 | * copies, we do as much as is possible. | |
518 | */ | |
519 | ||
520 | if (copy) | |
521 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
522 | else | |
523 | skb1 = skb; | |
524 | ||
525 | rc = -ENOMEM; | |
526 | if (!skb1) | |
527 | goto out_put; | |
528 | ||
529 | /* Do we need 2 SKBs? */ | |
530 | if (sock1 && sock2) | |
531 | skb2 = skb_clone(skb1, GFP_ATOMIC); | |
532 | else | |
533 | skb2 = skb1; | |
534 | ||
535 | if (sock1) | |
536 | ipxitf_def_skb_handler(sock1, skb1); | |
537 | ||
538 | if (!skb2) | |
539 | goto out_put; | |
540 | ||
541 | if (sock2) | |
542 | ipxitf_def_skb_handler(sock2, skb2); | |
543 | ||
544 | rc = 0; | |
545 | out_put: | |
546 | if (sock1) | |
547 | sock_put(sock1); | |
548 | if (sock2) | |
549 | sock_put(sock2); | |
550 | out: | |
551 | return rc; | |
552 | } | |
553 | #endif /* CONFIG_IPX_INTERN */ | |
554 | ||
555 | static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc, | |
556 | struct sk_buff *skb) | |
557 | { | |
558 | struct sk_buff *skb2; | |
559 | int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head; | |
560 | int out_offset = intrfc->if_ipx_offset; | |
561 | int len; | |
562 | ||
563 | /* Hopefully, most cases */ | |
564 | if (in_offset >= out_offset) | |
565 | return skb; | |
566 | ||
567 | /* Need new SKB */ | |
568 | len = skb->len + out_offset; | |
569 | skb2 = alloc_skb(len, GFP_ATOMIC); | |
570 | if (skb2) { | |
571 | skb_reserve(skb2, out_offset); | |
7e28ecc2 | 572 | skb_reset_network_header(skb2); |
badff6d0 | 573 | skb_reset_transport_header(skb2); |
7e28ecc2 | 574 | skb_put(skb2, skb->len); |
1da177e4 LT |
575 | memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len); |
576 | memcpy(skb2->cb, skb->cb, sizeof(skb->cb)); | |
577 | } | |
578 | kfree_skb(skb); | |
579 | return skb2; | |
580 | } | |
581 | ||
582 | /* caller must hold a reference to intrfc and the skb has to be unshared */ | |
583 | int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node) | |
584 | { | |
585 | struct ipxhdr *ipx = ipx_hdr(skb); | |
586 | struct net_device *dev = intrfc->if_dev; | |
587 | struct datalink_proto *dl = intrfc->if_dlink; | |
588 | char dest_node[IPX_NODE_LEN]; | |
589 | int send_to_wire = 1; | |
590 | int addr_len; | |
591 | ||
592 | ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl; | |
593 | ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net; | |
594 | ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net; | |
595 | ||
596 | /* see if we need to include the netnum in the route list */ | |
597 | if (IPX_SKB_CB(skb)->last_hop.index >= 0) { | |
4833ed09 | 598 | __be32 *last_hop = (__be32 *)(((u8 *) skb->data) + |
1da177e4 LT |
599 | sizeof(struct ipxhdr) + |
600 | IPX_SKB_CB(skb)->last_hop.index * | |
4833ed09 | 601 | sizeof(__be32)); |
1da177e4 LT |
602 | *last_hop = IPX_SKB_CB(skb)->last_hop.netnum; |
603 | IPX_SKB_CB(skb)->last_hop.index = -1; | |
604 | } | |
981c0ff6 YH |
605 | |
606 | /* | |
1da177e4 LT |
607 | * We need to know how many skbuffs it will take to send out this |
608 | * packet to avoid unnecessary copies. | |
609 | */ | |
981c0ff6 YH |
610 | |
611 | if (!dl || !dev || dev->flags & IFF_LOOPBACK) | |
1da177e4 LT |
612 | send_to_wire = 0; /* No non looped */ |
613 | ||
614 | /* | |
981c0ff6 | 615 | * See if this should be demuxed to sockets on this interface |
1da177e4 LT |
616 | * |
617 | * We want to ensure the original was eaten or that we only use | |
618 | * up clones. | |
619 | */ | |
981c0ff6 | 620 | |
1da177e4 LT |
621 | if (ipx->ipx_dest.net == intrfc->if_netnum) { |
622 | /* | |
623 | * To our own node, loop and free the original. | |
624 | * The internal net will receive on all node address. | |
625 | */ | |
626 | if (intrfc == ipx_internal_net || | |
627 | !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) { | |
628 | /* Don't charge sender */ | |
629 | skb_orphan(skb); | |
630 | ||
631 | /* Will charge receiver */ | |
632 | return ipxitf_demux_socket(intrfc, skb, 0); | |
633 | } | |
634 | ||
635 | /* Broadcast, loop and possibly keep to send on. */ | |
636 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) { | |
637 | if (!send_to_wire) | |
638 | skb_orphan(skb); | |
639 | ipxitf_demux_socket(intrfc, skb, send_to_wire); | |
640 | if (!send_to_wire) | |
641 | goto out; | |
642 | } | |
643 | } | |
644 | ||
645 | /* | |
646 | * If the originating net is not equal to our net; this is routed | |
647 | * We are still charging the sender. Which is right - the driver | |
648 | * free will handle this fairly. | |
649 | */ | |
650 | if (ipx->ipx_source.net != intrfc->if_netnum) { | |
651 | /* | |
652 | * Unshare the buffer before modifying the count in | |
653 | * case it's a flood or tcpdump | |
654 | */ | |
655 | skb = skb_unshare(skb, GFP_ATOMIC); | |
656 | if (!skb) | |
657 | goto out; | |
658 | if (++ipx->ipx_tctrl > ipxcfg_max_hops) | |
659 | send_to_wire = 0; | |
660 | } | |
661 | ||
662 | if (!send_to_wire) { | |
663 | kfree_skb(skb); | |
664 | goto out; | |
665 | } | |
666 | ||
667 | /* Determine the appropriate hardware address */ | |
668 | addr_len = dev->addr_len; | |
669 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) | |
670 | memcpy(dest_node, dev->broadcast, addr_len); | |
671 | else | |
672 | memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len); | |
673 | ||
674 | /* Make any compensation for differing physical/data link size */ | |
675 | skb = ipxitf_adjust_skbuff(intrfc, skb); | |
676 | if (!skb) | |
677 | goto out; | |
678 | ||
679 | /* set up data link and physical headers */ | |
680 | skb->dev = dev; | |
681 | skb->protocol = htons(ETH_P_IPX); | |
682 | ||
683 | /* Send it out */ | |
684 | dl->request(dl, skb, dest_node); | |
685 | out: | |
686 | return 0; | |
687 | } | |
688 | ||
689 | static int ipxitf_add_local_route(struct ipx_interface *intrfc) | |
690 | { | |
691 | return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL); | |
692 | } | |
693 | ||
694 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
695 | struct sk_buff *skb); | |
696 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb); | |
697 | ||
698 | static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb) | |
699 | { | |
700 | struct ipxhdr *ipx = ipx_hdr(skb); | |
701 | int rc = 0; | |
702 | ||
703 | ipxitf_hold(intrfc); | |
704 | ||
705 | /* See if we should update our network number */ | |
706 | if (!intrfc->if_netnum) /* net number of intrfc not known yet */ | |
981c0ff6 YH |
707 | ipxitf_discover_netnum(intrfc, skb); |
708 | ||
1da177e4 LT |
709 | IPX_SKB_CB(skb)->last_hop.index = -1; |
710 | if (ipx->ipx_type == IPX_TYPE_PPROP) { | |
711 | rc = ipxitf_pprop(intrfc, skb); | |
712 | if (rc) | |
713 | goto out_free_skb; | |
714 | } | |
715 | ||
716 | /* local processing follows */ | |
717 | if (!IPX_SKB_CB(skb)->ipx_dest_net) | |
718 | IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum; | |
719 | if (!IPX_SKB_CB(skb)->ipx_source_net) | |
720 | IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum; | |
721 | ||
722 | /* it doesn't make sense to route a pprop packet, there's no meaning | |
723 | * in the ipx_dest_net for such packets */ | |
724 | if (ipx->ipx_type != IPX_TYPE_PPROP && | |
725 | intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) { | |
726 | /* We only route point-to-point packets. */ | |
727 | if (skb->pkt_type == PACKET_HOST) { | |
728 | skb = skb_unshare(skb, GFP_ATOMIC); | |
729 | if (skb) | |
730 | rc = ipxrtr_route_skb(skb); | |
731 | goto out_intrfc; | |
732 | } | |
733 | ||
734 | goto out_free_skb; | |
735 | } | |
736 | ||
737 | /* see if we should keep it */ | |
738 | if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) || | |
739 | !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) { | |
740 | rc = ipxitf_demux_socket(intrfc, skb, 0); | |
741 | goto out_intrfc; | |
742 | } | |
743 | ||
744 | /* we couldn't pawn it off so unload it */ | |
745 | out_free_skb: | |
746 | kfree_skb(skb); | |
747 | out_intrfc: | |
748 | ipxitf_put(intrfc); | |
749 | return rc; | |
750 | } | |
751 | ||
752 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
753 | struct sk_buff *skb) | |
981c0ff6 | 754 | { |
1da177e4 LT |
755 | const struct ipx_cb *cb = IPX_SKB_CB(skb); |
756 | ||
757 | /* see if this is an intra packet: source_net == dest_net */ | |
758 | if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) { | |
759 | struct ipx_interface *i = | |
760 | ipxitf_find_using_net(cb->ipx_source_net); | |
761 | /* NB: NetWare servers lie about their hop count so we | |
762 | * dropped the test based on it. This is the best way | |
763 | * to determine this is a 0 hop count packet. */ | |
764 | if (!i) { | |
765 | intrfc->if_netnum = cb->ipx_source_net; | |
766 | ipxitf_add_local_route(intrfc); | |
767 | } else { | |
768 | printk(KERN_WARNING "IPX: Network number collision " | |
769 | "%lx\n %s %s and %s %s\n", | |
4833ed09 | 770 | (unsigned long) ntohl(cb->ipx_source_net), |
1da177e4 LT |
771 | ipx_device_name(i), |
772 | ipx_frame_name(i->if_dlink_type), | |
773 | ipx_device_name(intrfc), | |
774 | ipx_frame_name(intrfc->if_dlink_type)); | |
775 | ipxitf_put(i); | |
776 | } | |
777 | } | |
778 | } | |
779 | ||
780 | /** | |
781 | * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for | |
782 | * NetBIOS broadcasts | |
783 | * @intrfc: IPX interface receiving this packet | |
784 | * @skb: Received packet | |
785 | * | |
786 | * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it | |
787 | * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop | |
788 | * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we | |
789 | * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX | |
790 | * RIP and SAP Router Specification", Part Number 107-000029-001. | |
981c0ff6 | 791 | * |
1da177e4 LT |
792 | * If it is valid, check if we have pprop broadcasting enabled by the user, |
793 | * if not, just return zero for local processing. | |
794 | * | |
795 | * If it is enabled check the packet and don't broadcast it if we have already | |
796 | * seen this packet. | |
797 | * | |
798 | * Broadcast: send it to the interfaces that aren't on the packet visited nets | |
799 | * array, just after the IPX header. | |
800 | * | |
801 | * Returns -EINVAL for invalid packets, so that the calling function drops | |
802 | * the packet without local processing. 0 if packet is to be locally processed. | |
803 | */ | |
804 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb) | |
805 | { | |
806 | struct ipxhdr *ipx = ipx_hdr(skb); | |
807 | int i, rc = -EINVAL; | |
808 | struct ipx_interface *ifcs; | |
809 | char *c; | |
4833ed09 | 810 | __be32 *l; |
1da177e4 LT |
811 | |
812 | /* Illegal packet - too many hops or too short */ | |
813 | /* We decide to throw it away: no broadcasting, no local processing. | |
814 | * NetBIOS unaware implementations route them as normal packets - | |
815 | * tctrl <= 15, any data payload... */ | |
816 | if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS || | |
817 | ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) + | |
981c0ff6 | 818 | IPX_MAX_PPROP_HOPS * sizeof(u32)) |
1da177e4 LT |
819 | goto out; |
820 | /* are we broadcasting this damn thing? */ | |
821 | rc = 0; | |
822 | if (!sysctl_ipx_pprop_broadcasting) | |
823 | goto out; | |
824 | /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we | |
825 | * process it locally. All previous hops broadcasted it, and process it | |
826 | * locally. */ | |
827 | if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS) | |
828 | goto out; | |
981c0ff6 | 829 | |
1da177e4 | 830 | c = ((u8 *) ipx) + sizeof(struct ipxhdr); |
4833ed09 | 831 | l = (__be32 *) c; |
1da177e4 LT |
832 | |
833 | /* Don't broadcast packet if already seen this net */ | |
834 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
835 | if (*l++ == intrfc->if_netnum) | |
836 | goto out; | |
837 | ||
838 | /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the | |
839 | * position where we will insert recvd netnum into list, later on, | |
840 | * in ipxitf_send */ | |
841 | IPX_SKB_CB(skb)->last_hop.index = i; | |
842 | IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum; | |
843 | /* xmit on all other interfaces... */ | |
844 | spin_lock_bh(&ipx_interfaces_lock); | |
845 | list_for_each_entry(ifcs, &ipx_interfaces, node) { | |
846 | /* Except unconfigured interfaces */ | |
847 | if (!ifcs->if_netnum) | |
848 | continue; | |
981c0ff6 | 849 | |
1da177e4 LT |
850 | /* That aren't in the list */ |
851 | if (ifcs == intrfc) | |
852 | continue; | |
4833ed09 | 853 | l = (__be32 *) c; |
1da177e4 LT |
854 | /* don't consider the last entry in the packet list, |
855 | * it is our netnum, and it is not there yet */ | |
856 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
857 | if (ifcs->if_netnum == *l++) | |
858 | break; | |
859 | if (i == IPX_SKB_CB(skb)->ipx_tctrl) { | |
860 | struct sk_buff *s = skb_copy(skb, GFP_ATOMIC); | |
861 | ||
862 | if (s) { | |
863 | IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum; | |
864 | ipxrtr_route_skb(s); | |
865 | } | |
866 | } | |
867 | } | |
868 | spin_unlock_bh(&ipx_interfaces_lock); | |
869 | out: | |
870 | return rc; | |
871 | } | |
872 | ||
873 | static void ipxitf_insert(struct ipx_interface *intrfc) | |
874 | { | |
875 | spin_lock_bh(&ipx_interfaces_lock); | |
876 | list_add_tail(&intrfc->node, &ipx_interfaces); | |
877 | spin_unlock_bh(&ipx_interfaces_lock); | |
878 | ||
879 | if (ipxcfg_auto_select_primary && !ipx_primary_net) | |
880 | ipx_primary_net = intrfc; | |
881 | } | |
882 | ||
4833ed09 AV |
883 | static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum, |
884 | __be16 dlink_type, | |
1da177e4 LT |
885 | struct datalink_proto *dlink, |
886 | unsigned char internal, | |
887 | int ipx_offset) | |
888 | { | |
889 | struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC); | |
890 | ||
891 | if (intrfc) { | |
892 | intrfc->if_dev = dev; | |
893 | intrfc->if_netnum = netnum; | |
894 | intrfc->if_dlink_type = dlink_type; | |
895 | intrfc->if_dlink = dlink; | |
896 | intrfc->if_internal = internal; | |
897 | intrfc->if_ipx_offset = ipx_offset; | |
898 | intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET; | |
899 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
900 | atomic_set(&intrfc->refcnt, 1); | |
901 | spin_lock_init(&intrfc->if_sklist_lock); | |
902 | } | |
903 | ||
904 | return intrfc; | |
905 | } | |
906 | ||
907 | static int ipxitf_create_internal(struct ipx_interface_definition *idef) | |
908 | { | |
909 | struct ipx_interface *intrfc; | |
910 | int rc = -EEXIST; | |
911 | ||
912 | /* Only one primary network allowed */ | |
913 | if (ipx_primary_net) | |
914 | goto out; | |
915 | ||
916 | /* Must have a valid network number */ | |
917 | rc = -EADDRNOTAVAIL; | |
918 | if (!idef->ipx_network) | |
919 | goto out; | |
920 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
921 | rc = -EADDRINUSE; | |
922 | if (intrfc) { | |
923 | ipxitf_put(intrfc); | |
924 | goto out; | |
925 | } | |
926 | intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0); | |
927 | rc = -EAGAIN; | |
928 | if (!intrfc) | |
929 | goto out; | |
930 | memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN); | |
931 | ipx_internal_net = ipx_primary_net = intrfc; | |
932 | ipxitf_hold(intrfc); | |
933 | ipxitf_insert(intrfc); | |
934 | ||
935 | rc = ipxitf_add_local_route(intrfc); | |
936 | ipxitf_put(intrfc); | |
937 | out: | |
938 | return rc; | |
939 | } | |
940 | ||
4ac396c0 | 941 | static __be16 ipx_map_frame_type(unsigned char type) |
1da177e4 | 942 | { |
4ac396c0 | 943 | __be16 rc = 0; |
1da177e4 LT |
944 | |
945 | switch (type) { | |
946 | case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break; | |
947 | case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break; | |
948 | case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break; | |
949 | case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break; | |
950 | } | |
951 | ||
952 | return rc; | |
953 | } | |
954 | ||
955 | static int ipxitf_create(struct ipx_interface_definition *idef) | |
956 | { | |
957 | struct net_device *dev; | |
4833ed09 | 958 | __be16 dlink_type = 0; |
1da177e4 LT |
959 | struct datalink_proto *datalink = NULL; |
960 | struct ipx_interface *intrfc; | |
961 | int rc; | |
962 | ||
963 | if (idef->ipx_special == IPX_INTERNAL) { | |
964 | rc = ipxitf_create_internal(idef); | |
965 | goto out; | |
966 | } | |
967 | ||
968 | rc = -EEXIST; | |
969 | if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net) | |
970 | goto out; | |
971 | ||
972 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
973 | rc = -EADDRINUSE; | |
974 | if (idef->ipx_network && intrfc) { | |
975 | ipxitf_put(intrfc); | |
976 | goto out; | |
977 | } | |
978 | ||
979 | if (intrfc) | |
980 | ipxitf_put(intrfc); | |
981 | ||
881d966b | 982 | dev = dev_get_by_name(&init_net, idef->ipx_device); |
1da177e4 LT |
983 | rc = -ENODEV; |
984 | if (!dev) | |
985 | goto out; | |
986 | ||
987 | switch (idef->ipx_dlink_type) { | |
988 | case IPX_FRAME_TR_8022: | |
989 | printk(KERN_WARNING "IPX frame type 802.2TR is " | |
990 | "obsolete Use 802.2 instead.\n"); | |
991 | /* fall through */ | |
992 | case IPX_FRAME_8022: | |
993 | dlink_type = htons(ETH_P_802_2); | |
994 | datalink = p8022_datalink; | |
995 | break; | |
996 | case IPX_FRAME_ETHERII: | |
997 | if (dev->type != ARPHRD_IEEE802) { | |
998 | dlink_type = htons(ETH_P_IPX); | |
999 | datalink = pEII_datalink; | |
1000 | break; | |
981c0ff6 | 1001 | } else |
1da177e4 LT |
1002 | printk(KERN_WARNING "IPX frame type EtherII over " |
1003 | "token-ring is obsolete. Use SNAP " | |
1004 | "instead.\n"); | |
1005 | /* fall through */ | |
1006 | case IPX_FRAME_SNAP: | |
1007 | dlink_type = htons(ETH_P_SNAP); | |
1008 | datalink = pSNAP_datalink; | |
1009 | break; | |
1010 | case IPX_FRAME_8023: | |
1011 | dlink_type = htons(ETH_P_802_3); | |
1012 | datalink = p8023_datalink; | |
1013 | break; | |
1014 | case IPX_FRAME_NONE: | |
1015 | default: | |
1016 | rc = -EPROTONOSUPPORT; | |
1017 | goto out_dev; | |
1018 | } | |
1019 | ||
1020 | rc = -ENETDOWN; | |
1021 | if (!(dev->flags & IFF_UP)) | |
1022 | goto out_dev; | |
1023 | ||
1024 | /* Check addresses are suitable */ | |
1025 | rc = -EINVAL; | |
1026 | if (dev->addr_len > IPX_NODE_LEN) | |
1027 | goto out_dev; | |
1028 | ||
1029 | intrfc = ipxitf_find_using_phys(dev, dlink_type); | |
1030 | if (!intrfc) { | |
1031 | /* Ok now create */ | |
1032 | intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type, | |
1033 | datalink, 0, dev->hard_header_len + | |
1034 | datalink->header_length); | |
1035 | rc = -EAGAIN; | |
1036 | if (!intrfc) | |
1037 | goto out_dev; | |
1038 | /* Setup primary if necessary */ | |
1039 | if (idef->ipx_special == IPX_PRIMARY) | |
1040 | ipx_primary_net = intrfc; | |
1041 | if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000", | |
1042 | IPX_NODE_LEN)) { | |
1043 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1044 | memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len, | |
1045 | dev->dev_addr, dev->addr_len); | |
1046 | } else | |
1047 | memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN); | |
1048 | ipxitf_hold(intrfc); | |
1049 | ipxitf_insert(intrfc); | |
1050 | } | |
1051 | ||
1052 | ||
1053 | /* If the network number is known, add a route */ | |
1054 | rc = 0; | |
1055 | if (!intrfc->if_netnum) | |
1056 | goto out_intrfc; | |
1057 | ||
1058 | rc = ipxitf_add_local_route(intrfc); | |
1059 | out_intrfc: | |
1060 | ipxitf_put(intrfc); | |
1061 | goto out; | |
1062 | out_dev: | |
1063 | dev_put(dev); | |
1064 | out: | |
1065 | return rc; | |
1066 | } | |
1067 | ||
1068 | static int ipxitf_delete(struct ipx_interface_definition *idef) | |
1069 | { | |
1070 | struct net_device *dev = NULL; | |
4833ed09 | 1071 | __be16 dlink_type = 0; |
1da177e4 LT |
1072 | struct ipx_interface *intrfc; |
1073 | int rc = 0; | |
1074 | ||
1075 | spin_lock_bh(&ipx_interfaces_lock); | |
1076 | if (idef->ipx_special == IPX_INTERNAL) { | |
1077 | if (ipx_internal_net) { | |
1078 | __ipxitf_put(ipx_internal_net); | |
1079 | goto out; | |
1080 | } | |
1081 | rc = -ENOENT; | |
1082 | goto out; | |
1083 | } | |
1084 | ||
1085 | dlink_type = ipx_map_frame_type(idef->ipx_dlink_type); | |
1086 | rc = -EPROTONOSUPPORT; | |
1087 | if (!dlink_type) | |
1088 | goto out; | |
1089 | ||
881d966b | 1090 | dev = __dev_get_by_name(&init_net, idef->ipx_device); |
1da177e4 LT |
1091 | rc = -ENODEV; |
1092 | if (!dev) | |
1093 | goto out; | |
1094 | ||
1095 | intrfc = __ipxitf_find_using_phys(dev, dlink_type); | |
1096 | rc = -EINVAL; | |
1097 | if (!intrfc) | |
1098 | goto out; | |
1099 | __ipxitf_put(intrfc); | |
1100 | ||
1101 | rc = 0; | |
1102 | out: | |
1103 | spin_unlock_bh(&ipx_interfaces_lock); | |
1104 | return rc; | |
1105 | } | |
1106 | ||
1107 | static struct ipx_interface *ipxitf_auto_create(struct net_device *dev, | |
4833ed09 | 1108 | __be16 dlink_type) |
1da177e4 LT |
1109 | { |
1110 | struct ipx_interface *intrfc = NULL; | |
1111 | struct datalink_proto *datalink; | |
1112 | ||
1113 | if (!dev) | |
1114 | goto out; | |
1115 | ||
1116 | /* Check addresses are suitable */ | |
1117 | if (dev->addr_len > IPX_NODE_LEN) | |
1118 | goto out; | |
1119 | ||
4833ed09 | 1120 | switch (ntohs(dlink_type)) { |
1da177e4 LT |
1121 | case ETH_P_IPX: datalink = pEII_datalink; break; |
1122 | case ETH_P_802_2: datalink = p8022_datalink; break; | |
1123 | case ETH_P_SNAP: datalink = pSNAP_datalink; break; | |
1124 | case ETH_P_802_3: datalink = p8023_datalink; break; | |
1125 | default: goto out; | |
1126 | } | |
1127 | ||
1128 | intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0, | |
1129 | dev->hard_header_len + datalink->header_length); | |
1130 | ||
1131 | if (intrfc) { | |
1132 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1133 | memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]), | |
1134 | dev->dev_addr, dev->addr_len); | |
1135 | spin_lock_init(&intrfc->if_sklist_lock); | |
1136 | atomic_set(&intrfc->refcnt, 1); | |
1137 | ipxitf_insert(intrfc); | |
1138 | dev_hold(dev); | |
1139 | } | |
1140 | ||
1141 | out: | |
1142 | return intrfc; | |
1143 | } | |
1144 | ||
1145 | static int ipxitf_ioctl(unsigned int cmd, void __user *arg) | |
1146 | { | |
1147 | int rc = -EINVAL; | |
1148 | struct ifreq ifr; | |
1149 | int val; | |
1150 | ||
1151 | switch (cmd) { | |
1152 | case SIOCSIFADDR: { | |
1153 | struct sockaddr_ipx *sipx; | |
1154 | struct ipx_interface_definition f; | |
1155 | ||
1156 | rc = -EFAULT; | |
1157 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1158 | break; | |
1159 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
1160 | rc = -EINVAL; | |
1161 | if (sipx->sipx_family != AF_IPX) | |
1162 | break; | |
1163 | f.ipx_network = sipx->sipx_network; | |
1164 | memcpy(f.ipx_device, ifr.ifr_name, | |
1165 | sizeof(f.ipx_device)); | |
1166 | memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN); | |
1167 | f.ipx_dlink_type = sipx->sipx_type; | |
1168 | f.ipx_special = sipx->sipx_special; | |
1169 | ||
1170 | if (sipx->sipx_action == IPX_DLTITF) | |
1171 | rc = ipxitf_delete(&f); | |
1172 | else | |
1173 | rc = ipxitf_create(&f); | |
1174 | break; | |
1175 | } | |
1176 | case SIOCGIFADDR: { | |
1177 | struct sockaddr_ipx *sipx; | |
1178 | struct ipx_interface *ipxif; | |
1179 | struct net_device *dev; | |
1180 | ||
1181 | rc = -EFAULT; | |
1182 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1183 | break; | |
1184 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
881d966b | 1185 | dev = __dev_get_by_name(&init_net, ifr.ifr_name); |
1da177e4 LT |
1186 | rc = -ENODEV; |
1187 | if (!dev) | |
1188 | break; | |
1189 | ipxif = ipxitf_find_using_phys(dev, | |
1190 | ipx_map_frame_type(sipx->sipx_type)); | |
1191 | rc = -EADDRNOTAVAIL; | |
1192 | if (!ipxif) | |
1193 | break; | |
1194 | ||
1195 | sipx->sipx_family = AF_IPX; | |
1196 | sipx->sipx_network = ipxif->if_netnum; | |
1197 | memcpy(sipx->sipx_node, ipxif->if_node, | |
1198 | sizeof(sipx->sipx_node)); | |
1199 | rc = -EFAULT; | |
1200 | if (copy_to_user(arg, &ifr, sizeof(ifr))) | |
1201 | break; | |
1202 | ipxitf_put(ipxif); | |
1203 | rc = 0; | |
1204 | break; | |
1205 | } | |
981c0ff6 | 1206 | case SIOCAIPXITFCRT: |
1da177e4 LT |
1207 | rc = -EFAULT; |
1208 | if (get_user(val, (unsigned char __user *) arg)) | |
1209 | break; | |
1210 | rc = 0; | |
1211 | ipxcfg_auto_create_interfaces = val; | |
1212 | break; | |
981c0ff6 | 1213 | case SIOCAIPXPRISLT: |
1da177e4 LT |
1214 | rc = -EFAULT; |
1215 | if (get_user(val, (unsigned char __user *) arg)) | |
1216 | break; | |
1217 | rc = 0; | |
1218 | ipxcfg_set_auto_select(val); | |
1219 | break; | |
1220 | } | |
1221 | ||
1222 | return rc; | |
1223 | } | |
1224 | ||
1225 | /* | |
1226 | * Checksum routine for IPX | |
1227 | */ | |
981c0ff6 | 1228 | |
1da177e4 LT |
1229 | /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */ |
1230 | /* This functions should *not* mess with packet contents */ | |
1231 | ||
02e60370 | 1232 | __be16 ipx_cksum(struct ipxhdr *packet, int length) |
1da177e4 | 1233 | { |
981c0ff6 YH |
1234 | /* |
1235 | * NOTE: sum is a net byte order quantity, which optimizes the | |
1da177e4 LT |
1236 | * loop. This only works on big and little endian machines. (I |
1237 | * don't know of a machine that isn't.) | |
1238 | */ | |
02e60370 AV |
1239 | /* handle the first 3 words separately; checksum should be skipped |
1240 | * and ipx_tctrl masked out */ | |
1241 | __u16 *p = (__u16 *)packet; | |
1242 | __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff)); | |
1243 | __u32 i = (length >> 1) - 3; /* Number of remaining complete words */ | |
1244 | ||
1245 | /* Loop through them */ | |
1246 | p += 3; | |
1247 | while (i--) | |
1da177e4 LT |
1248 | sum += *p++; |
1249 | ||
1250 | /* Add on the last part word if it exists */ | |
1251 | if (packet->ipx_pktsize & htons(1)) | |
02e60370 | 1252 | sum += (__force u16)htons(0xff00) & *p; |
1da177e4 LT |
1253 | |
1254 | /* Do final fixup */ | |
1255 | sum = (sum & 0xffff) + (sum >> 16); | |
1256 | ||
1257 | /* It's a pity there's no concept of carry in C */ | |
1258 | if (sum >= 0x10000) | |
1259 | sum++; | |
1260 | ||
02e60370 AV |
1261 | /* |
1262 | * Leave 0 alone; we don't want 0xffff here. Note that we can't get | |
1263 | * here with 0x10000, so this check is the same as ((__u16)sum) | |
1264 | */ | |
1265 | if (sum) | |
1266 | sum = ~sum; | |
1267 | ||
1268 | return (__force __be16)sum; | |
1da177e4 LT |
1269 | } |
1270 | ||
4833ed09 | 1271 | const char *ipx_frame_name(__be16 frame) |
1da177e4 LT |
1272 | { |
1273 | char* rc = "None"; | |
1274 | ||
1275 | switch (ntohs(frame)) { | |
1276 | case ETH_P_IPX: rc = "EtherII"; break; | |
1277 | case ETH_P_802_2: rc = "802.2"; break; | |
1278 | case ETH_P_SNAP: rc = "SNAP"; break; | |
1279 | case ETH_P_802_3: rc = "802.3"; break; | |
1280 | case ETH_P_TR_802_2: rc = "802.2TR"; break; | |
1281 | } | |
1282 | ||
1283 | return rc; | |
1284 | } | |
1285 | ||
1286 | const char *ipx_device_name(struct ipx_interface *intrfc) | |
1287 | { | |
1288 | return intrfc->if_internal ? "Internal" : | |
1289 | intrfc->if_dev ? intrfc->if_dev->name : "Unknown"; | |
1290 | } | |
1291 | ||
1292 | /* Handling for system calls applied via the various interfaces to an IPX | |
1293 | * socket object. */ | |
1294 | ||
1295 | static int ipx_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 1296 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
1297 | { |
1298 | struct sock *sk = sock->sk; | |
1299 | int opt; | |
1300 | int rc = -EINVAL; | |
1301 | ||
83927ba0 | 1302 | lock_kernel(); |
1da177e4 LT |
1303 | if (optlen != sizeof(int)) |
1304 | goto out; | |
1305 | ||
1306 | rc = -EFAULT; | |
1307 | if (get_user(opt, (unsigned int __user *)optval)) | |
1308 | goto out; | |
1309 | ||
1310 | rc = -ENOPROTOOPT; | |
1311 | if (!(level == SOL_IPX && optname == IPX_TYPE)) | |
1312 | goto out; | |
1313 | ||
1314 | ipx_sk(sk)->type = opt; | |
1315 | rc = 0; | |
1316 | out: | |
83927ba0 | 1317 | unlock_kernel(); |
1da177e4 LT |
1318 | return rc; |
1319 | } | |
1320 | ||
1321 | static int ipx_getsockopt(struct socket *sock, int level, int optname, | |
1322 | char __user *optval, int __user *optlen) | |
1323 | { | |
1324 | struct sock *sk = sock->sk; | |
1325 | int val = 0; | |
1326 | int len; | |
1327 | int rc = -ENOPROTOOPT; | |
1328 | ||
83927ba0 | 1329 | lock_kernel(); |
1da177e4 LT |
1330 | if (!(level == SOL_IPX && optname == IPX_TYPE)) |
1331 | goto out; | |
1332 | ||
1333 | val = ipx_sk(sk)->type; | |
1334 | ||
1335 | rc = -EFAULT; | |
1336 | if (get_user(len, optlen)) | |
1337 | goto out; | |
1338 | ||
1339 | len = min_t(unsigned int, len, sizeof(int)); | |
1340 | rc = -EINVAL; | |
1341 | if(len < 0) | |
1342 | goto out; | |
981c0ff6 | 1343 | |
1da177e4 LT |
1344 | rc = -EFAULT; |
1345 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) | |
1346 | goto out; | |
1347 | ||
1348 | rc = 0; | |
1349 | out: | |
83927ba0 | 1350 | unlock_kernel(); |
1da177e4 LT |
1351 | return rc; |
1352 | } | |
1353 | ||
1354 | static struct proto ipx_proto = { | |
1355 | .name = "IPX", | |
1356 | .owner = THIS_MODULE, | |
1357 | .obj_size = sizeof(struct ipx_sock), | |
1358 | }; | |
1359 | ||
3f378b68 EP |
1360 | static int ipx_create(struct net *net, struct socket *sock, int protocol, |
1361 | int kern) | |
1da177e4 LT |
1362 | { |
1363 | int rc = -ESOCKTNOSUPPORT; | |
1364 | struct sock *sk; | |
1365 | ||
09ad9bc7 | 1366 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
1367 | return -EAFNOSUPPORT; |
1368 | ||
1da177e4 LT |
1369 | /* |
1370 | * SPX support is not anymore in the kernel sources. If you want to | |
1371 | * ressurrect it, completing it and making it understand shared skbs, | |
1372 | * be fully multithreaded, etc, grab the sources in an early 2.5 kernel | |
1373 | * tree. | |
1374 | */ | |
1375 | if (sock->type != SOCK_DGRAM) | |
1376 | goto out; | |
1377 | ||
981c0ff6 | 1378 | rc = -ENOMEM; |
6257ff21 | 1379 | sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto); |
1da177e4 LT |
1380 | if (!sk) |
1381 | goto out; | |
c2b42336 PE |
1382 | |
1383 | sk_refcnt_debug_inc(sk); | |
1da177e4 LT |
1384 | sock_init_data(sock, sk); |
1385 | sk->sk_no_check = 1; /* Checksum off by default */ | |
1386 | sock->ops = &ipx_dgram_ops; | |
1387 | rc = 0; | |
1388 | out: | |
1389 | return rc; | |
1390 | } | |
1391 | ||
1392 | static int ipx_release(struct socket *sock) | |
1393 | { | |
1394 | struct sock *sk = sock->sk; | |
1395 | ||
1396 | if (!sk) | |
1397 | goto out; | |
1398 | ||
83927ba0 | 1399 | lock_kernel(); |
1da177e4 LT |
1400 | if (!sock_flag(sk, SOCK_DEAD)) |
1401 | sk->sk_state_change(sk); | |
1402 | ||
1403 | sock_set_flag(sk, SOCK_DEAD); | |
1404 | sock->sk = NULL; | |
c2b42336 | 1405 | sk_refcnt_debug_release(sk); |
1da177e4 | 1406 | ipx_destroy_socket(sk); |
83927ba0 | 1407 | unlock_kernel(); |
1da177e4 LT |
1408 | out: |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | /* caller must hold a reference to intrfc */ | |
1413 | ||
4833ed09 | 1414 | static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc) |
1da177e4 LT |
1415 | { |
1416 | unsigned short socketNum = intrfc->if_sknum; | |
1417 | ||
1418 | spin_lock_bh(&intrfc->if_sklist_lock); | |
1419 | ||
1420 | if (socketNum < IPX_MIN_EPHEMERAL_SOCKET) | |
1421 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1422 | ||
4833ed09 | 1423 | while (__ipxitf_find_socket(intrfc, htons(socketNum))) |
1da177e4 LT |
1424 | if (socketNum > IPX_MAX_EPHEMERAL_SOCKET) |
1425 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1426 | else | |
1427 | socketNum++; | |
1428 | ||
1429 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
1430 | intrfc->if_sknum = socketNum; | |
1431 | ||
4833ed09 | 1432 | return htons(socketNum); |
1da177e4 LT |
1433 | } |
1434 | ||
83927ba0 AB |
1435 | static int __ipx_bind(struct socket *sock, |
1436 | struct sockaddr *uaddr, int addr_len) | |
1da177e4 LT |
1437 | { |
1438 | struct sock *sk = sock->sk; | |
1439 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1440 | struct ipx_interface *intrfc; | |
1441 | struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr; | |
1442 | int rc = -EINVAL; | |
1443 | ||
1444 | if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx)) | |
1445 | goto out; | |
1446 | ||
1447 | intrfc = ipxitf_find_using_net(addr->sipx_network); | |
1448 | rc = -EADDRNOTAVAIL; | |
1449 | if (!intrfc) | |
1450 | goto out; | |
1451 | ||
1452 | if (!addr->sipx_port) { | |
1453 | addr->sipx_port = ipx_first_free_socketnum(intrfc); | |
1454 | rc = -EINVAL; | |
1455 | if (!addr->sipx_port) | |
1456 | goto out_put; | |
1457 | } | |
1458 | ||
1459 | /* protect IPX system stuff like routing/sap */ | |
1460 | rc = -EACCES; | |
1461 | if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET && | |
1462 | !capable(CAP_NET_ADMIN)) | |
1463 | goto out_put; | |
1464 | ||
1465 | ipxs->port = addr->sipx_port; | |
1466 | ||
1467 | #ifdef CONFIG_IPX_INTERN | |
1468 | if (intrfc == ipx_internal_net) { | |
1469 | /* The source address is to be set explicitly if the | |
1470 | * socket is to be bound on the internal network. If a | |
1471 | * node number 0 was specified, the default is used. | |
1472 | */ | |
1473 | ||
1474 | rc = -EINVAL; | |
1475 | if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN)) | |
1476 | goto out_put; | |
1477 | if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN)) | |
1478 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1479 | else | |
1480 | memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN); | |
1481 | ||
1482 | rc = -EADDRINUSE; | |
1483 | if (ipxitf_find_internal_socket(intrfc, ipxs->node, | |
1484 | ipxs->port)) { | |
1485 | SOCK_DEBUG(sk, | |
1486 | "IPX: bind failed because port %X in use.\n", | |
4833ed09 | 1487 | ntohs(addr->sipx_port)); |
1da177e4 LT |
1488 | goto out_put; |
1489 | } | |
1490 | } else { | |
1491 | /* Source addresses are easy. It must be our | |
1492 | * network:node pair for an interface routed to IPX | |
1493 | * with the ipx routing ioctl() | |
1494 | */ | |
1495 | ||
1496 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1497 | ||
1498 | rc = -EADDRINUSE; | |
1499 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1500 | SOCK_DEBUG(sk, | |
1501 | "IPX: bind failed because port %X in use.\n", | |
4833ed09 | 1502 | ntohs(addr->sipx_port)); |
1da177e4 LT |
1503 | goto out_put; |
1504 | } | |
1505 | } | |
1506 | ||
1507 | #else /* !def CONFIG_IPX_INTERN */ | |
1508 | ||
1509 | /* Source addresses are easy. It must be our network:node pair for | |
1510 | an interface routed to IPX with the ipx routing ioctl() */ | |
1511 | ||
1512 | rc = -EADDRINUSE; | |
1513 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1514 | SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n", | |
1515 | ntohs((int)addr->sipx_port)); | |
1516 | goto out_put; | |
1517 | } | |
1518 | ||
1519 | #endif /* CONFIG_IPX_INTERN */ | |
1520 | ||
1521 | ipxitf_insert_socket(intrfc, sk); | |
1522 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1523 | ||
1524 | rc = 0; | |
1525 | out_put: | |
1526 | ipxitf_put(intrfc); | |
1527 | out: | |
1528 | return rc; | |
1529 | } | |
1530 | ||
83927ba0 AB |
1531 | static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
1532 | { | |
1533 | int rc; | |
1534 | ||
1535 | lock_kernel(); | |
1536 | rc = __ipx_bind(sock, uaddr, addr_len); | |
1537 | unlock_kernel(); | |
1538 | ||
1539 | return rc; | |
1540 | } | |
1541 | ||
1da177e4 LT |
1542 | static int ipx_connect(struct socket *sock, struct sockaddr *uaddr, |
1543 | int addr_len, int flags) | |
1544 | { | |
1545 | struct sock *sk = sock->sk; | |
1546 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1547 | struct sockaddr_ipx *addr; | |
1548 | int rc = -EINVAL; | |
1549 | struct ipx_route *rt; | |
1550 | ||
1551 | sk->sk_state = TCP_CLOSE; | |
1552 | sock->state = SS_UNCONNECTED; | |
1553 | ||
83927ba0 | 1554 | lock_kernel(); |
1da177e4 LT |
1555 | if (addr_len != sizeof(*addr)) |
1556 | goto out; | |
1557 | addr = (struct sockaddr_ipx *)uaddr; | |
1558 | ||
1559 | /* put the autobinding in */ | |
1560 | if (!ipxs->port) { | |
1561 | struct sockaddr_ipx uaddr; | |
1562 | ||
1563 | uaddr.sipx_port = 0; | |
1564 | uaddr.sipx_network = 0; | |
1565 | ||
1566 | #ifdef CONFIG_IPX_INTERN | |
1567 | rc = -ENETDOWN; | |
1568 | if (!ipxs->intrfc) | |
1569 | goto out; /* Someone zonked the iface */ | |
1570 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1571 | IPX_NODE_LEN); | |
1572 | #endif /* CONFIG_IPX_INTERN */ | |
1573 | ||
83927ba0 | 1574 | rc = __ipx_bind(sock, (struct sockaddr *)&uaddr, |
1da177e4 LT |
1575 | sizeof(struct sockaddr_ipx)); |
1576 | if (rc) | |
1577 | goto out; | |
1578 | } | |
1579 | ||
981c0ff6 | 1580 | /* We can either connect to primary network or somewhere |
1da177e4 LT |
1581 | * we can route to */ |
1582 | rt = ipxrtr_lookup(addr->sipx_network); | |
1583 | rc = -ENETUNREACH; | |
1584 | if (!rt && !(!addr->sipx_network && ipx_primary_net)) | |
1585 | goto out; | |
1586 | ||
1587 | ipxs->dest_addr.net = addr->sipx_network; | |
1588 | ipxs->dest_addr.sock = addr->sipx_port; | |
1589 | memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN); | |
1590 | ipxs->type = addr->sipx_type; | |
1591 | ||
1592 | if (sock->type == SOCK_DGRAM) { | |
1593 | sock->state = SS_CONNECTED; | |
1594 | sk->sk_state = TCP_ESTABLISHED; | |
1595 | } | |
1596 | ||
1597 | if (rt) | |
1598 | ipxrtr_put(rt); | |
1599 | rc = 0; | |
1600 | out: | |
83927ba0 | 1601 | unlock_kernel(); |
1da177e4 LT |
1602 | return rc; |
1603 | } | |
1604 | ||
1605 | ||
1606 | static int ipx_getname(struct socket *sock, struct sockaddr *uaddr, | |
1607 | int *uaddr_len, int peer) | |
1608 | { | |
1609 | struct ipx_address *addr; | |
1610 | struct sockaddr_ipx sipx; | |
1611 | struct sock *sk = sock->sk; | |
1612 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1613 | int rc; | |
1614 | ||
1615 | *uaddr_len = sizeof(struct sockaddr_ipx); | |
1616 | ||
83927ba0 | 1617 | lock_kernel(); |
1da177e4 LT |
1618 | if (peer) { |
1619 | rc = -ENOTCONN; | |
1620 | if (sk->sk_state != TCP_ESTABLISHED) | |
1621 | goto out; | |
1622 | ||
1623 | addr = &ipxs->dest_addr; | |
1624 | sipx.sipx_network = addr->net; | |
1625 | sipx.sipx_port = addr->sock; | |
1626 | memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN); | |
1627 | } else { | |
1628 | if (ipxs->intrfc) { | |
1629 | sipx.sipx_network = ipxs->intrfc->if_netnum; | |
1630 | #ifdef CONFIG_IPX_INTERN | |
1631 | memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN); | |
1632 | #else | |
1633 | memcpy(sipx.sipx_node, ipxs->intrfc->if_node, | |
1634 | IPX_NODE_LEN); | |
1635 | #endif /* CONFIG_IPX_INTERN */ | |
1636 | ||
1637 | } else { | |
1638 | sipx.sipx_network = 0; | |
1639 | memset(sipx.sipx_node, '\0', IPX_NODE_LEN); | |
1640 | } | |
1641 | ||
1642 | sipx.sipx_port = ipxs->port; | |
1643 | } | |
1644 | ||
1645 | sipx.sipx_family = AF_IPX; | |
1646 | sipx.sipx_type = ipxs->type; | |
1647 | sipx.sipx_zero = 0; | |
1648 | memcpy(uaddr, &sipx, sizeof(sipx)); | |
1649 | ||
1650 | rc = 0; | |
1651 | out: | |
83927ba0 AB |
1652 | unlock_kernel(); |
1653 | return rc; | |
1654 | } | |
1655 | ||
1656 | static unsigned int ipx_datagram_poll(struct file *file, struct socket *sock, | |
1657 | poll_table *wait) | |
1658 | { | |
1659 | int rc; | |
1660 | ||
1661 | lock_kernel(); | |
1662 | rc = datagram_poll(file, sock, wait); | |
1663 | unlock_kernel(); | |
1664 | ||
1da177e4 LT |
1665 | return rc; |
1666 | } | |
1667 | ||
f2ccd8fa | 1668 | static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
1669 | { |
1670 | /* NULL here for pt means the packet was looped back */ | |
1671 | struct ipx_interface *intrfc; | |
1672 | struct ipxhdr *ipx; | |
1673 | u16 ipx_pktsize; | |
1674 | int rc = 0; | |
981c0ff6 | 1675 | |
721499e8 | 1676 | if (!net_eq(dev_net(dev), &init_net)) |
e730c155 EB |
1677 | goto drop; |
1678 | ||
981c0ff6 YH |
1679 | /* Not ours */ |
1680 | if (skb->pkt_type == PACKET_OTHERHOST) | |
1681 | goto drop; | |
1da177e4 LT |
1682 | |
1683 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
1684 | goto out; | |
1685 | ||
7b1ba8de SH |
1686 | if (!pskb_may_pull(skb, sizeof(struct ipxhdr))) |
1687 | goto drop; | |
1688 | ||
fff64257 | 1689 | ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize); |
981c0ff6 | 1690 | |
1da177e4 | 1691 | /* Too small or invalid header? */ |
8b5cc5ef SH |
1692 | if (ipx_pktsize < sizeof(struct ipxhdr) || |
1693 | !pskb_may_pull(skb, ipx_pktsize)) | |
1da177e4 | 1694 | goto drop; |
981c0ff6 | 1695 | |
7b1ba8de | 1696 | ipx = ipx_hdr(skb); |
1da177e4 LT |
1697 | if (ipx->ipx_checksum != IPX_NO_CHECKSUM && |
1698 | ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize)) | |
1699 | goto drop; | |
1700 | ||
1701 | IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl; | |
1702 | IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net; | |
1703 | IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net; | |
1704 | ||
1705 | /* Determine what local ipx endpoint this is */ | |
1706 | intrfc = ipxitf_find_using_phys(dev, pt->type); | |
1707 | if (!intrfc) { | |
1708 | if (ipxcfg_auto_create_interfaces && | |
4833ed09 | 1709 | IPX_SKB_CB(skb)->ipx_dest_net) { |
1da177e4 LT |
1710 | intrfc = ipxitf_auto_create(dev, pt->type); |
1711 | if (intrfc) | |
1712 | ipxitf_hold(intrfc); | |
1713 | } | |
1714 | ||
1715 | if (!intrfc) /* Not one of ours */ | |
1716 | /* or invalid packet for auto creation */ | |
1717 | goto drop; | |
1718 | } | |
1719 | ||
1720 | rc = ipxitf_rcv(intrfc, skb); | |
1721 | ipxitf_put(intrfc); | |
1722 | goto out; | |
1723 | drop: | |
1724 | kfree_skb(skb); | |
1725 | out: | |
1726 | return rc; | |
1727 | } | |
1728 | ||
1729 | static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1730 | struct msghdr *msg, size_t len) | |
1731 | { | |
1732 | struct sock *sk = sock->sk; | |
1733 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1734 | struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name; | |
1735 | struct sockaddr_ipx local_sipx; | |
1736 | int rc = -EINVAL; | |
1737 | int flags = msg->msg_flags; | |
1738 | ||
83927ba0 | 1739 | lock_kernel(); |
1da177e4 LT |
1740 | /* Socket gets bound below anyway */ |
1741 | /* if (sk->sk_zapped) | |
1742 | return -EIO; */ /* Socket not bound */ | |
1743 | if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) | |
1744 | goto out; | |
1745 | ||
1746 | /* Max possible packet size limited by 16 bit pktsize in header */ | |
1747 | if (len >= 65535 - sizeof(struct ipxhdr)) | |
1748 | goto out; | |
1749 | ||
1750 | if (usipx) { | |
1751 | if (!ipxs->port) { | |
1752 | struct sockaddr_ipx uaddr; | |
1753 | ||
1754 | uaddr.sipx_port = 0; | |
1755 | uaddr.sipx_network = 0; | |
1756 | #ifdef CONFIG_IPX_INTERN | |
1757 | rc = -ENETDOWN; | |
1758 | if (!ipxs->intrfc) | |
1759 | goto out; /* Someone zonked the iface */ | |
1760 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1761 | IPX_NODE_LEN); | |
1762 | #endif | |
83927ba0 | 1763 | rc = __ipx_bind(sock, (struct sockaddr *)&uaddr, |
1da177e4 LT |
1764 | sizeof(struct sockaddr_ipx)); |
1765 | if (rc) | |
1766 | goto out; | |
1767 | } | |
1768 | ||
1769 | rc = -EINVAL; | |
1770 | if (msg->msg_namelen < sizeof(*usipx) || | |
1771 | usipx->sipx_family != AF_IPX) | |
1772 | goto out; | |
1773 | } else { | |
1774 | rc = -ENOTCONN; | |
1775 | if (sk->sk_state != TCP_ESTABLISHED) | |
1776 | goto out; | |
1777 | ||
1778 | usipx = &local_sipx; | |
1779 | usipx->sipx_family = AF_IPX; | |
1780 | usipx->sipx_type = ipxs->type; | |
1781 | usipx->sipx_port = ipxs->dest_addr.sock; | |
1782 | usipx->sipx_network = ipxs->dest_addr.net; | |
1783 | memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN); | |
1784 | } | |
1785 | ||
1786 | rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len, | |
1787 | flags & MSG_DONTWAIT); | |
1788 | if (rc >= 0) | |
1789 | rc = len; | |
1790 | out: | |
83927ba0 | 1791 | unlock_kernel(); |
1da177e4 LT |
1792 | return rc; |
1793 | } | |
1794 | ||
1795 | ||
1796 | static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1797 | struct msghdr *msg, size_t size, int flags) | |
1798 | { | |
1799 | struct sock *sk = sock->sk; | |
1800 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1801 | struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name; | |
1802 | struct ipxhdr *ipx = NULL; | |
1803 | struct sk_buff *skb; | |
1804 | int copied, rc; | |
1805 | ||
83927ba0 | 1806 | lock_kernel(); |
1da177e4 LT |
1807 | /* put the autobinding in */ |
1808 | if (!ipxs->port) { | |
1809 | struct sockaddr_ipx uaddr; | |
1810 | ||
1811 | uaddr.sipx_port = 0; | |
1812 | uaddr.sipx_network = 0; | |
1813 | ||
1814 | #ifdef CONFIG_IPX_INTERN | |
1815 | rc = -ENETDOWN; | |
1816 | if (!ipxs->intrfc) | |
1817 | goto out; /* Someone zonked the iface */ | |
1818 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN); | |
1819 | #endif /* CONFIG_IPX_INTERN */ | |
1820 | ||
83927ba0 | 1821 | rc = __ipx_bind(sock, (struct sockaddr *)&uaddr, |
1da177e4 LT |
1822 | sizeof(struct sockaddr_ipx)); |
1823 | if (rc) | |
1824 | goto out; | |
1825 | } | |
981c0ff6 | 1826 | |
1da177e4 LT |
1827 | rc = -ENOTCONN; |
1828 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1829 | goto out; | |
1830 | ||
1831 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1832 | flags & MSG_DONTWAIT, &rc); | |
1833 | if (!skb) | |
1834 | goto out; | |
1835 | ||
1836 | ipx = ipx_hdr(skb); | |
1837 | copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr); | |
1838 | if (copied > size) { | |
1839 | copied = size; | |
1840 | msg->msg_flags |= MSG_TRUNC; | |
1841 | } | |
1842 | ||
1843 | rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov, | |
1844 | copied); | |
1845 | if (rc) | |
1846 | goto out_free; | |
b7aa0bf7 ED |
1847 | if (skb->tstamp.tv64) |
1848 | sk->sk_stamp = skb->tstamp; | |
1da177e4 LT |
1849 | |
1850 | msg->msg_namelen = sizeof(*sipx); | |
1851 | ||
1852 | if (sipx) { | |
1853 | sipx->sipx_family = AF_IPX; | |
1854 | sipx->sipx_port = ipx->ipx_source.sock; | |
1855 | memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN); | |
1856 | sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net; | |
1857 | sipx->sipx_type = ipx->ipx_type; | |
1858 | sipx->sipx_zero = 0; | |
1859 | } | |
1860 | rc = copied; | |
1861 | ||
1862 | out_free: | |
1863 | skb_free_datagram(sk, skb); | |
1864 | out: | |
83927ba0 | 1865 | unlock_kernel(); |
1da177e4 LT |
1866 | return rc; |
1867 | } | |
1868 | ||
1869 | ||
1870 | static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1871 | { | |
1872 | int rc = 0; | |
1873 | long amount = 0; | |
1874 | struct sock *sk = sock->sk; | |
1875 | void __user *argp = (void __user *)arg; | |
1876 | ||
83927ba0 | 1877 | lock_kernel(); |
1da177e4 LT |
1878 | switch (cmd) { |
1879 | case TIOCOUTQ: | |
31e6d363 | 1880 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1da177e4 LT |
1881 | if (amount < 0) |
1882 | amount = 0; | |
1883 | rc = put_user(amount, (int __user *)argp); | |
1884 | break; | |
1885 | case TIOCINQ: { | |
1886 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); | |
1887 | /* These two are safe on a single CPU system as only | |
1888 | * user tasks fiddle here */ | |
1889 | if (skb) | |
1890 | amount = skb->len - sizeof(struct ipxhdr); | |
1891 | rc = put_user(amount, (int __user *)argp); | |
1892 | break; | |
1893 | } | |
1894 | case SIOCADDRT: | |
1895 | case SIOCDELRT: | |
1896 | rc = -EPERM; | |
1897 | if (capable(CAP_NET_ADMIN)) | |
1898 | rc = ipxrtr_ioctl(cmd, argp); | |
1899 | break; | |
1900 | case SIOCSIFADDR: | |
1901 | case SIOCAIPXITFCRT: | |
1902 | case SIOCAIPXPRISLT: | |
1903 | rc = -EPERM; | |
1904 | if (!capable(CAP_NET_ADMIN)) | |
1905 | break; | |
1906 | case SIOCGIFADDR: | |
1907 | rc = ipxitf_ioctl(cmd, argp); | |
1908 | break; | |
1909 | case SIOCIPXCFGDATA: | |
1910 | rc = ipxcfg_get_config_data(argp); | |
1911 | break; | |
1912 | case SIOCIPXNCPCONN: | |
1913 | /* | |
1914 | * This socket wants to take care of the NCP connection | |
1915 | * handed to us in arg. | |
1916 | */ | |
981c0ff6 YH |
1917 | rc = -EPERM; |
1918 | if (!capable(CAP_NET_ADMIN)) | |
1da177e4 LT |
1919 | break; |
1920 | rc = get_user(ipx_sk(sk)->ipx_ncp_conn, | |
1921 | (const unsigned short __user *)argp); | |
1922 | break; | |
1923 | case SIOCGSTAMP: | |
1924 | rc = -EINVAL; | |
981c0ff6 | 1925 | if (sk) |
1da177e4 LT |
1926 | rc = sock_get_timestamp(sk, argp); |
1927 | break; | |
1928 | case SIOCGIFDSTADDR: | |
1929 | case SIOCSIFDSTADDR: | |
1930 | case SIOCGIFBRDADDR: | |
1931 | case SIOCSIFBRDADDR: | |
1932 | case SIOCGIFNETMASK: | |
1933 | case SIOCSIFNETMASK: | |
1934 | rc = -EINVAL; | |
1935 | break; | |
1936 | default: | |
b5e5fa5e | 1937 | rc = -ENOIOCTLCMD; |
1da177e4 LT |
1938 | break; |
1939 | } | |
83927ba0 | 1940 | unlock_kernel(); |
1da177e4 LT |
1941 | |
1942 | return rc; | |
1943 | } | |
1944 | ||
f6c90b71 PV |
1945 | |
1946 | #ifdef CONFIG_COMPAT | |
1947 | static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1948 | { | |
1949 | /* | |
1950 | * These 4 commands use same structure on 32bit and 64bit. Rest of IPX | |
1951 | * commands is handled by generic ioctl code. As these commands are | |
1952 | * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic | |
1953 | * code. | |
1954 | */ | |
1955 | switch (cmd) { | |
1956 | case SIOCAIPXITFCRT: | |
1957 | case SIOCAIPXPRISLT: | |
1958 | case SIOCIPXCFGDATA: | |
1959 | case SIOCIPXNCPCONN: | |
1960 | return ipx_ioctl(sock, cmd, arg); | |
1961 | default: | |
1962 | return -ENOIOCTLCMD; | |
1963 | } | |
1964 | } | |
1965 | #endif | |
1966 | ||
1967 | ||
1da177e4 LT |
1968 | /* |
1969 | * Socket family declarations | |
1970 | */ | |
1971 | ||
ec1b4cf7 | 1972 | static const struct net_proto_family ipx_family_ops = { |
1da177e4 LT |
1973 | .family = PF_IPX, |
1974 | .create = ipx_create, | |
1975 | .owner = THIS_MODULE, | |
1976 | }; | |
1977 | ||
83927ba0 | 1978 | static const struct proto_ops ipx_dgram_ops = { |
1da177e4 LT |
1979 | .family = PF_IPX, |
1980 | .owner = THIS_MODULE, | |
1981 | .release = ipx_release, | |
1982 | .bind = ipx_bind, | |
1983 | .connect = ipx_connect, | |
1984 | .socketpair = sock_no_socketpair, | |
1985 | .accept = sock_no_accept, | |
1986 | .getname = ipx_getname, | |
83927ba0 | 1987 | .poll = ipx_datagram_poll, |
1da177e4 | 1988 | .ioctl = ipx_ioctl, |
f6c90b71 PV |
1989 | #ifdef CONFIG_COMPAT |
1990 | .compat_ioctl = ipx_compat_ioctl, | |
1991 | #endif | |
1da177e4 LT |
1992 | .listen = sock_no_listen, |
1993 | .shutdown = sock_no_shutdown, /* FIXME: support shutdown */ | |
1994 | .setsockopt = ipx_setsockopt, | |
1995 | .getsockopt = ipx_getsockopt, | |
1996 | .sendmsg = ipx_sendmsg, | |
1997 | .recvmsg = ipx_recvmsg, | |
1998 | .mmap = sock_no_mmap, | |
1999 | .sendpage = sock_no_sendpage, | |
2000 | }; | |
2001 | ||
7546dd97 | 2002 | static struct packet_type ipx_8023_packet_type __read_mostly = { |
09640e63 | 2003 | .type = cpu_to_be16(ETH_P_802_3), |
1da177e4 LT |
2004 | .func = ipx_rcv, |
2005 | }; | |
2006 | ||
7546dd97 | 2007 | static struct packet_type ipx_dix_packet_type __read_mostly = { |
09640e63 | 2008 | .type = cpu_to_be16(ETH_P_IPX), |
1da177e4 LT |
2009 | .func = ipx_rcv, |
2010 | }; | |
2011 | ||
2012 | static struct notifier_block ipx_dev_notifier = { | |
2013 | .notifier_call = ipxitf_device_event, | |
2014 | }; | |
2015 | ||
2016 | extern struct datalink_proto *make_EII_client(void); | |
1da177e4 | 2017 | extern void destroy_EII_client(struct datalink_proto *); |
1da177e4 | 2018 | |
fa665ccf SH |
2019 | static const unsigned char ipx_8022_type = 0xE0; |
2020 | static const unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 }; | |
2021 | static const char ipx_EII_err_msg[] __initconst = | |
1da177e4 | 2022 | KERN_CRIT "IPX: Unable to register with Ethernet II\n"; |
fa665ccf | 2023 | static const char ipx_8023_err_msg[] __initconst = |
1da177e4 | 2024 | KERN_CRIT "IPX: Unable to register with 802.3\n"; |
fa665ccf | 2025 | static const char ipx_llc_err_msg[] __initconst = |
1da177e4 | 2026 | KERN_CRIT "IPX: Unable to register with 802.2\n"; |
fa665ccf | 2027 | static const char ipx_snap_err_msg[] __initconst = |
1da177e4 LT |
2028 | KERN_CRIT "IPX: Unable to register with SNAP\n"; |
2029 | ||
2030 | static int __init ipx_init(void) | |
2031 | { | |
2032 | int rc = proto_register(&ipx_proto, 1); | |
2033 | ||
2034 | if (rc != 0) | |
2035 | goto out; | |
2036 | ||
2037 | sock_register(&ipx_family_ops); | |
2038 | ||
2039 | pEII_datalink = make_EII_client(); | |
2040 | if (pEII_datalink) | |
2041 | dev_add_pack(&ipx_dix_packet_type); | |
2042 | else | |
2043 | printk(ipx_EII_err_msg); | |
2044 | ||
2045 | p8023_datalink = make_8023_client(); | |
2046 | if (p8023_datalink) | |
2047 | dev_add_pack(&ipx_8023_packet_type); | |
2048 | else | |
2049 | printk(ipx_8023_err_msg); | |
2050 | ||
2051 | p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv); | |
2052 | if (!p8022_datalink) | |
2053 | printk(ipx_llc_err_msg); | |
2054 | ||
2055 | pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv); | |
2056 | if (!pSNAP_datalink) | |
2057 | printk(ipx_snap_err_msg); | |
2058 | ||
2059 | register_netdevice_notifier(&ipx_dev_notifier); | |
2060 | ipx_register_sysctl(); | |
2061 | ipx_proc_init(); | |
2062 | out: | |
2063 | return rc; | |
2064 | } | |
2065 | ||
2066 | static void __exit ipx_proto_finito(void) | |
2067 | { | |
2068 | ipx_proc_exit(); | |
2069 | ipx_unregister_sysctl(); | |
2070 | ||
2071 | unregister_netdevice_notifier(&ipx_dev_notifier); | |
2072 | ||
2073 | ipxitf_cleanup(); | |
2074 | ||
1539b98b JB |
2075 | if (pSNAP_datalink) { |
2076 | unregister_snap_client(pSNAP_datalink); | |
2077 | pSNAP_datalink = NULL; | |
2078 | } | |
1da177e4 | 2079 | |
1539b98b JB |
2080 | if (p8022_datalink) { |
2081 | unregister_8022_client(p8022_datalink); | |
2082 | p8022_datalink = NULL; | |
2083 | } | |
1da177e4 LT |
2084 | |
2085 | dev_remove_pack(&ipx_8023_packet_type); | |
1539b98b JB |
2086 | if (p8023_datalink) { |
2087 | destroy_8023_client(p8023_datalink); | |
2088 | p8023_datalink = NULL; | |
2089 | } | |
1da177e4 LT |
2090 | |
2091 | dev_remove_pack(&ipx_dix_packet_type); | |
1539b98b JB |
2092 | if (pEII_datalink) { |
2093 | destroy_EII_client(pEII_datalink); | |
2094 | pEII_datalink = NULL; | |
2095 | } | |
1da177e4 LT |
2096 | |
2097 | proto_unregister(&ipx_proto); | |
2098 | sock_unregister(ipx_family_ops.family); | |
2099 | } | |
2100 | ||
2101 | module_init(ipx_init); | |
2102 | module_exit(ipx_proto_finito); | |
2103 | MODULE_LICENSE("GPL"); | |
2104 | MODULE_ALIAS_NETPROTO(PF_IPX); |