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> | |
43 | #include <linux/skbuff.h> | |
44 | #include <linux/socket.h> | |
45 | #include <linux/sockios.h> | |
46 | #include <linux/string.h> | |
1da177e4 LT |
47 | #include <linux/types.h> |
48 | #include <linux/termios.h> | |
49 | ||
50 | #include <net/ipx.h> | |
51 | #include <net/p8022.h> | |
52 | #include <net/psnap.h> | |
53 | #include <net/sock.h> | |
c752f073 | 54 | #include <net/tcp_states.h> |
1da177e4 LT |
55 | |
56 | #include <asm/uaccess.h> | |
57 | ||
58 | #ifdef CONFIG_SYSCTL | |
59 | extern void ipx_register_sysctl(void); | |
60 | extern void ipx_unregister_sysctl(void); | |
61 | #else | |
62 | #define ipx_register_sysctl() | |
63 | #define ipx_unregister_sysctl() | |
64 | #endif | |
65 | ||
66 | /* Configuration Variables */ | |
67 | static unsigned char ipxcfg_max_hops = 16; | |
68 | static char ipxcfg_auto_select_primary; | |
69 | static char ipxcfg_auto_create_interfaces; | |
70 | int sysctl_ipx_pprop_broadcasting = 1; | |
71 | ||
72 | /* Global Variables */ | |
73 | static struct datalink_proto *p8022_datalink; | |
74 | static struct datalink_proto *pEII_datalink; | |
75 | static struct datalink_proto *p8023_datalink; | |
76 | static struct datalink_proto *pSNAP_datalink; | |
77 | ||
90ddc4f0 | 78 | static const struct proto_ops ipx_dgram_ops; |
1da177e4 LT |
79 | |
80 | LIST_HEAD(ipx_interfaces); | |
81 | DEFINE_SPINLOCK(ipx_interfaces_lock); | |
82 | ||
83 | struct ipx_interface *ipx_primary_net; | |
84 | struct ipx_interface *ipx_internal_net; | |
85 | ||
4833ed09 | 86 | extern int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc, |
1da177e4 LT |
87 | unsigned char *node); |
88 | extern void ipxrtr_del_routes(struct ipx_interface *intrfc); | |
89 | extern int ipxrtr_route_packet(struct sock *sk, struct sockaddr_ipx *usipx, | |
0479ea0e | 90 | struct iovec *iov, size_t len, int noblock); |
1da177e4 | 91 | extern int ipxrtr_route_skb(struct sk_buff *skb); |
4833ed09 | 92 | extern struct ipx_route *ipxrtr_lookup(__be32 net); |
1da177e4 LT |
93 | extern int ipxrtr_ioctl(unsigned int cmd, void __user *arg); |
94 | ||
95 | #undef IPX_REFCNT_DEBUG | |
96 | #ifdef IPX_REFCNT_DEBUG | |
97 | atomic_t ipx_sock_nr; | |
98 | #endif | |
99 | ||
100 | struct ipx_interface *ipx_interfaces_head(void) | |
101 | { | |
102 | struct ipx_interface *rc = NULL; | |
103 | ||
104 | if (!list_empty(&ipx_interfaces)) | |
105 | rc = list_entry(ipx_interfaces.next, | |
106 | struct ipx_interface, node); | |
107 | return rc; | |
108 | } | |
109 | ||
110 | static void ipxcfg_set_auto_select(char val) | |
111 | { | |
112 | ipxcfg_auto_select_primary = val; | |
113 | if (val && !ipx_primary_net) | |
114 | ipx_primary_net = ipx_interfaces_head(); | |
115 | } | |
116 | ||
117 | static int ipxcfg_get_config_data(struct ipx_config_data __user *arg) | |
118 | { | |
119 | struct ipx_config_data vals; | |
120 | ||
121 | vals.ipxcfg_auto_create_interfaces = ipxcfg_auto_create_interfaces; | |
122 | vals.ipxcfg_auto_select_primary = ipxcfg_auto_select_primary; | |
123 | ||
124 | return copy_to_user(arg, &vals, sizeof(vals)) ? -EFAULT : 0; | |
125 | } | |
126 | ||
127 | /* | |
128 | * Note: Sockets may not be removed _during_ an interrupt or inet_bh | |
129 | * handler using this technique. They can be added although we do not | |
130 | * use this facility. | |
131 | */ | |
132 | ||
133 | static void ipx_remove_socket(struct sock *sk) | |
134 | { | |
135 | /* Determine interface with which socket is associated */ | |
136 | struct ipx_interface *intrfc = ipx_sk(sk)->intrfc; | |
137 | ||
138 | if (!intrfc) | |
139 | goto out; | |
140 | ||
141 | ipxitf_hold(intrfc); | |
142 | spin_lock_bh(&intrfc->if_sklist_lock); | |
143 | sk_del_node_init(sk); | |
144 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
145 | ipxitf_put(intrfc); | |
146 | out: | |
147 | return; | |
148 | } | |
149 | ||
150 | static void ipx_destroy_socket(struct sock *sk) | |
151 | { | |
152 | ipx_remove_socket(sk); | |
153 | skb_queue_purge(&sk->sk_receive_queue); | |
154 | #ifdef IPX_REFCNT_DEBUG | |
981c0ff6 YH |
155 | atomic_dec(&ipx_sock_nr); |
156 | printk(KERN_DEBUG "IPX socket %p released, %d are still alive\n", sk, | |
1da177e4 LT |
157 | atomic_read(&ipx_sock_nr)); |
158 | if (atomic_read(&sk->sk_refcnt) != 1) | |
159 | printk(KERN_DEBUG "Destruction sock ipx %p delayed, cnt=%d\n", | |
160 | sk, atomic_read(&sk->sk_refcnt)); | |
161 | #endif | |
162 | sock_put(sk); | |
163 | } | |
164 | ||
981c0ff6 | 165 | /* |
1da177e4 LT |
166 | * The following code is used to support IPX Interfaces (IPXITF). An |
167 | * IPX interface is defined by a physical device and a frame type. | |
168 | */ | |
169 | ||
170 | /* ipxitf_clear_primary_net has to be called with ipx_interfaces_lock held */ | |
171 | ||
172 | static void ipxitf_clear_primary_net(void) | |
173 | { | |
174 | ipx_primary_net = NULL; | |
175 | if (ipxcfg_auto_select_primary) | |
176 | ipx_primary_net = ipx_interfaces_head(); | |
177 | } | |
178 | ||
179 | static struct ipx_interface *__ipxitf_find_using_phys(struct net_device *dev, | |
4833ed09 | 180 | __be16 datalink) |
1da177e4 LT |
181 | { |
182 | struct ipx_interface *i; | |
183 | ||
184 | list_for_each_entry(i, &ipx_interfaces, node) | |
185 | if (i->if_dev == dev && i->if_dlink_type == datalink) | |
186 | goto out; | |
187 | i = NULL; | |
188 | out: | |
189 | return i; | |
190 | } | |
191 | ||
192 | static struct ipx_interface *ipxitf_find_using_phys(struct net_device *dev, | |
4833ed09 | 193 | __be16 datalink) |
1da177e4 LT |
194 | { |
195 | struct ipx_interface *i; | |
196 | ||
197 | spin_lock_bh(&ipx_interfaces_lock); | |
198 | i = __ipxitf_find_using_phys(dev, datalink); | |
199 | if (i) | |
200 | ipxitf_hold(i); | |
201 | spin_unlock_bh(&ipx_interfaces_lock); | |
202 | return i; | |
203 | } | |
204 | ||
4833ed09 | 205 | struct ipx_interface *ipxitf_find_using_net(__be32 net) |
1da177e4 LT |
206 | { |
207 | struct ipx_interface *i; | |
208 | ||
209 | spin_lock_bh(&ipx_interfaces_lock); | |
210 | if (net) { | |
211 | list_for_each_entry(i, &ipx_interfaces, node) | |
212 | if (i->if_netnum == net) | |
213 | goto hold; | |
214 | i = NULL; | |
215 | goto unlock; | |
216 | } | |
217 | ||
218 | i = ipx_primary_net; | |
219 | if (i) | |
220 | hold: | |
221 | ipxitf_hold(i); | |
222 | unlock: | |
223 | spin_unlock_bh(&ipx_interfaces_lock); | |
224 | return i; | |
225 | } | |
226 | ||
227 | /* Sockets are bound to a particular IPX interface. */ | |
228 | static void ipxitf_insert_socket(struct ipx_interface *intrfc, struct sock *sk) | |
229 | { | |
230 | ipxitf_hold(intrfc); | |
231 | spin_lock_bh(&intrfc->if_sklist_lock); | |
232 | ipx_sk(sk)->intrfc = intrfc; | |
233 | sk_add_node(sk, &intrfc->if_sklist); | |
234 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
235 | ipxitf_put(intrfc); | |
236 | } | |
237 | ||
238 | /* caller must hold intrfc->if_sklist_lock */ | |
239 | static struct sock *__ipxitf_find_socket(struct ipx_interface *intrfc, | |
4833ed09 | 240 | __be16 port) |
1da177e4 LT |
241 | { |
242 | struct sock *s; | |
243 | struct hlist_node *node; | |
244 | ||
245 | sk_for_each(s, node, &intrfc->if_sklist) | |
246 | if (ipx_sk(s)->port == port) | |
247 | goto found; | |
248 | s = NULL; | |
249 | found: | |
250 | return s; | |
251 | } | |
252 | ||
253 | /* caller must hold a reference to intrfc */ | |
254 | static struct sock *ipxitf_find_socket(struct ipx_interface *intrfc, | |
4833ed09 | 255 | __be16 port) |
1da177e4 LT |
256 | { |
257 | struct sock *s; | |
258 | ||
259 | spin_lock_bh(&intrfc->if_sklist_lock); | |
260 | s = __ipxitf_find_socket(intrfc, port); | |
261 | if (s) | |
262 | sock_hold(s); | |
263 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
264 | ||
265 | return s; | |
266 | } | |
267 | ||
268 | #ifdef CONFIG_IPX_INTERN | |
269 | static struct sock *ipxitf_find_internal_socket(struct ipx_interface *intrfc, | |
270 | unsigned char *ipx_node, | |
4833ed09 | 271 | __be16 port) |
1da177e4 LT |
272 | { |
273 | struct sock *s; | |
274 | struct hlist_node *node; | |
275 | ||
276 | ipxitf_hold(intrfc); | |
277 | spin_lock_bh(&intrfc->if_sklist_lock); | |
278 | ||
279 | sk_for_each(s, node, &intrfc->if_sklist) { | |
280 | struct ipx_sock *ipxs = ipx_sk(s); | |
281 | ||
282 | if (ipxs->port == port && | |
283 | !memcmp(ipx_node, ipxs->node, IPX_NODE_LEN)) | |
284 | goto found; | |
285 | } | |
286 | s = NULL; | |
287 | found: | |
288 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
289 | ipxitf_put(intrfc); | |
290 | return s; | |
291 | } | |
292 | #endif | |
293 | ||
294 | static void __ipxitf_down(struct ipx_interface *intrfc) | |
295 | { | |
296 | struct sock *s; | |
297 | struct hlist_node *node, *t; | |
298 | ||
299 | /* Delete all routes associated with this interface */ | |
300 | ipxrtr_del_routes(intrfc); | |
301 | ||
302 | spin_lock_bh(&intrfc->if_sklist_lock); | |
303 | /* error sockets */ | |
304 | sk_for_each_safe(s, node, t, &intrfc->if_sklist) { | |
305 | struct ipx_sock *ipxs = ipx_sk(s); | |
306 | ||
307 | s->sk_err = ENOLINK; | |
308 | s->sk_error_report(s); | |
309 | ipxs->intrfc = NULL; | |
310 | ipxs->port = 0; | |
311 | sock_set_flag(s, SOCK_ZAPPED); /* Indicates it is no longer bound */ | |
312 | sk_del_node_init(s); | |
313 | } | |
314 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
315 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
316 | ||
317 | /* remove this interface from list */ | |
318 | list_del(&intrfc->node); | |
319 | ||
320 | /* remove this interface from *special* networks */ | |
321 | if (intrfc == ipx_primary_net) | |
322 | ipxitf_clear_primary_net(); | |
323 | if (intrfc == ipx_internal_net) | |
324 | ipx_internal_net = NULL; | |
325 | ||
326 | if (intrfc->if_dev) | |
327 | dev_put(intrfc->if_dev); | |
328 | kfree(intrfc); | |
329 | } | |
330 | ||
331 | void ipxitf_down(struct ipx_interface *intrfc) | |
332 | { | |
333 | spin_lock_bh(&ipx_interfaces_lock); | |
334 | __ipxitf_down(intrfc); | |
335 | spin_unlock_bh(&ipx_interfaces_lock); | |
336 | } | |
337 | ||
338 | static __inline__ void __ipxitf_put(struct ipx_interface *intrfc) | |
339 | { | |
340 | if (atomic_dec_and_test(&intrfc->refcnt)) | |
341 | __ipxitf_down(intrfc); | |
342 | } | |
343 | ||
344 | static int ipxitf_device_event(struct notifier_block *notifier, | |
345 | unsigned long event, void *ptr) | |
346 | { | |
347 | struct net_device *dev = ptr; | |
348 | struct ipx_interface *i, *tmp; | |
349 | ||
e9dc8653 EB |
350 | if (dev->nd_net != &init_net) |
351 | return NOTIFY_DONE; | |
352 | ||
1da177e4 LT |
353 | if (event != NETDEV_DOWN && event != NETDEV_UP) |
354 | goto out; | |
355 | ||
356 | spin_lock_bh(&ipx_interfaces_lock); | |
357 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) | |
358 | if (i->if_dev == dev) { | |
359 | if (event == NETDEV_UP) | |
360 | ipxitf_hold(i); | |
361 | else | |
362 | __ipxitf_put(i); | |
363 | } | |
364 | spin_unlock_bh(&ipx_interfaces_lock); | |
365 | out: | |
366 | return NOTIFY_DONE; | |
367 | } | |
368 | ||
369 | ||
370 | static __exit void ipxitf_cleanup(void) | |
371 | { | |
372 | struct ipx_interface *i, *tmp; | |
373 | ||
374 | spin_lock_bh(&ipx_interfaces_lock); | |
981c0ff6 | 375 | list_for_each_entry_safe(i, tmp, &ipx_interfaces, node) |
1da177e4 LT |
376 | __ipxitf_put(i); |
377 | spin_unlock_bh(&ipx_interfaces_lock); | |
378 | } | |
379 | ||
380 | static void ipxitf_def_skb_handler(struct sock *sock, struct sk_buff *skb) | |
381 | { | |
382 | if (sock_queue_rcv_skb(sock, skb) < 0) | |
383 | kfree_skb(skb); | |
384 | } | |
385 | ||
386 | /* | |
387 | * On input skb->sk is NULL. Nobody is charged for the memory. | |
388 | */ | |
389 | ||
390 | /* caller must hold a reference to intrfc */ | |
391 | ||
392 | #ifdef CONFIG_IPX_INTERN | |
393 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
394 | struct sk_buff *skb, int copy) | |
395 | { | |
396 | struct ipxhdr *ipx = ipx_hdr(skb); | |
397 | int is_broadcast = !memcmp(ipx->ipx_dest.node, ipx_broadcast_node, | |
398 | IPX_NODE_LEN); | |
399 | struct sock *s; | |
400 | struct hlist_node *node; | |
401 | int rc; | |
402 | ||
403 | spin_lock_bh(&intrfc->if_sklist_lock); | |
404 | ||
405 | sk_for_each(s, node, &intrfc->if_sklist) { | |
406 | struct ipx_sock *ipxs = ipx_sk(s); | |
407 | ||
408 | if (ipxs->port == ipx->ipx_dest.sock && | |
409 | (is_broadcast || !memcmp(ipx->ipx_dest.node, | |
410 | ipxs->node, IPX_NODE_LEN))) { | |
411 | /* We found a socket to which to send */ | |
412 | struct sk_buff *skb1; | |
413 | ||
414 | if (copy) { | |
415 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
416 | rc = -ENOMEM; | |
417 | if (!skb1) | |
418 | goto out; | |
419 | } else { | |
420 | skb1 = skb; | |
421 | copy = 1; /* skb may only be used once */ | |
422 | } | |
423 | ipxitf_def_skb_handler(s, skb1); | |
424 | ||
425 | /* On an external interface, one socket can listen */ | |
426 | if (intrfc != ipx_internal_net) | |
427 | break; | |
428 | } | |
429 | } | |
430 | ||
431 | /* skb was solely for us, and we did not make a copy, so free it. */ | |
432 | if (!copy) | |
433 | kfree_skb(skb); | |
434 | ||
435 | rc = 0; | |
436 | out: | |
437 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
438 | return rc; | |
439 | } | |
440 | #else | |
441 | static struct sock *ncp_connection_hack(struct ipx_interface *intrfc, | |
442 | struct ipxhdr *ipx) | |
443 | { | |
444 | /* The packet's target is a NCP connection handler. We want to hand it | |
445 | * to the correct socket directly within the kernel, so that the | |
446 | * mars_nwe packet distribution process does not have to do it. Here we | |
447 | * only care about NCP and BURST packets. | |
448 | * | |
449 | * You might call this a hack, but believe me, you do not want a | |
450 | * complete NCP layer in the kernel, and this is VERY fast as well. */ | |
451 | struct sock *sk = NULL; | |
981c0ff6 | 452 | int connection = 0; |
1da177e4 LT |
453 | u8 *ncphdr = (u8 *)(ipx + 1); |
454 | ||
981c0ff6 | 455 | if (*ncphdr == 0x22 && *(ncphdr + 1) == 0x22) /* NCP request */ |
1da177e4 LT |
456 | connection = (((int) *(ncphdr + 5)) << 8) | (int) *(ncphdr + 3); |
457 | else if (*ncphdr == 0x77 && *(ncphdr + 1) == 0x77) /* BURST packet */ | |
458 | connection = (((int) *(ncphdr + 9)) << 8) | (int) *(ncphdr + 8); | |
459 | ||
460 | if (connection) { | |
461 | struct hlist_node *node; | |
462 | /* Now we have to look for a special NCP connection handling | |
463 | * socket. Only these sockets have ipx_ncp_conn != 0, set by | |
464 | * SIOCIPXNCPCONN. */ | |
465 | spin_lock_bh(&intrfc->if_sklist_lock); | |
466 | sk_for_each(sk, node, &intrfc->if_sklist) | |
467 | if (ipx_sk(sk)->ipx_ncp_conn == connection) { | |
468 | sock_hold(sk); | |
469 | goto found; | |
470 | } | |
471 | sk = NULL; | |
472 | found: | |
473 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
474 | } | |
475 | return sk; | |
476 | } | |
477 | ||
478 | static int ipxitf_demux_socket(struct ipx_interface *intrfc, | |
479 | struct sk_buff *skb, int copy) | |
480 | { | |
481 | struct ipxhdr *ipx = ipx_hdr(skb); | |
482 | struct sock *sock1 = NULL, *sock2 = NULL; | |
483 | struct sk_buff *skb1 = NULL, *skb2 = NULL; | |
484 | int rc; | |
485 | ||
486 | if (intrfc == ipx_primary_net && ntohs(ipx->ipx_dest.sock) == 0x451) | |
487 | sock1 = ncp_connection_hack(intrfc, ipx); | |
981c0ff6 | 488 | if (!sock1) |
1da177e4 LT |
489 | /* No special socket found, forward the packet the normal way */ |
490 | sock1 = ipxitf_find_socket(intrfc, ipx->ipx_dest.sock); | |
491 | ||
492 | /* | |
493 | * We need to check if there is a primary net and if | |
494 | * this is addressed to one of the *SPECIAL* sockets because | |
495 | * these need to be propagated to the primary net. | |
496 | * The *SPECIAL* socket list contains: 0x452(SAP), 0x453(RIP) and | |
497 | * 0x456(Diagnostic). | |
498 | */ | |
499 | ||
500 | if (ipx_primary_net && intrfc != ipx_primary_net) { | |
501 | const int dsock = ntohs(ipx->ipx_dest.sock); | |
502 | ||
503 | if (dsock == 0x452 || dsock == 0x453 || dsock == 0x456) | |
504 | /* The appropriate thing to do here is to dup the | |
505 | * packet and route to the primary net interface via | |
506 | * ipxitf_send; however, we'll cheat and just demux it | |
507 | * here. */ | |
508 | sock2 = ipxitf_find_socket(ipx_primary_net, | |
509 | ipx->ipx_dest.sock); | |
510 | } | |
511 | ||
512 | /* | |
513 | * If there is nothing to do return. The kfree will cancel any charging. | |
514 | */ | |
515 | rc = 0; | |
516 | if (!sock1 && !sock2) { | |
517 | if (!copy) | |
518 | kfree_skb(skb); | |
519 | goto out; | |
520 | } | |
521 | ||
522 | /* | |
523 | * This next segment of code is a little awkward, but it sets it up | |
524 | * so that the appropriate number of copies of the SKB are made and | |
525 | * that skb1 and skb2 point to it (them) so that it (they) can be | |
526 | * demuxed to sock1 and/or sock2. If we are unable to make enough | |
527 | * copies, we do as much as is possible. | |
528 | */ | |
529 | ||
530 | if (copy) | |
531 | skb1 = skb_clone(skb, GFP_ATOMIC); | |
532 | else | |
533 | skb1 = skb; | |
534 | ||
535 | rc = -ENOMEM; | |
536 | if (!skb1) | |
537 | goto out_put; | |
538 | ||
539 | /* Do we need 2 SKBs? */ | |
540 | if (sock1 && sock2) | |
541 | skb2 = skb_clone(skb1, GFP_ATOMIC); | |
542 | else | |
543 | skb2 = skb1; | |
544 | ||
545 | if (sock1) | |
546 | ipxitf_def_skb_handler(sock1, skb1); | |
547 | ||
548 | if (!skb2) | |
549 | goto out_put; | |
550 | ||
551 | if (sock2) | |
552 | ipxitf_def_skb_handler(sock2, skb2); | |
553 | ||
554 | rc = 0; | |
555 | out_put: | |
556 | if (sock1) | |
557 | sock_put(sock1); | |
558 | if (sock2) | |
559 | sock_put(sock2); | |
560 | out: | |
561 | return rc; | |
562 | } | |
563 | #endif /* CONFIG_IPX_INTERN */ | |
564 | ||
565 | static struct sk_buff *ipxitf_adjust_skbuff(struct ipx_interface *intrfc, | |
566 | struct sk_buff *skb) | |
567 | { | |
568 | struct sk_buff *skb2; | |
569 | int in_offset = (unsigned char *)ipx_hdr(skb) - skb->head; | |
570 | int out_offset = intrfc->if_ipx_offset; | |
571 | int len; | |
572 | ||
573 | /* Hopefully, most cases */ | |
574 | if (in_offset >= out_offset) | |
575 | return skb; | |
576 | ||
577 | /* Need new SKB */ | |
578 | len = skb->len + out_offset; | |
579 | skb2 = alloc_skb(len, GFP_ATOMIC); | |
580 | if (skb2) { | |
581 | skb_reserve(skb2, out_offset); | |
7e28ecc2 | 582 | skb_reset_network_header(skb2); |
badff6d0 | 583 | skb_reset_transport_header(skb2); |
7e28ecc2 | 584 | skb_put(skb2, skb->len); |
1da177e4 LT |
585 | memcpy(ipx_hdr(skb2), ipx_hdr(skb), skb->len); |
586 | memcpy(skb2->cb, skb->cb, sizeof(skb->cb)); | |
587 | } | |
588 | kfree_skb(skb); | |
589 | return skb2; | |
590 | } | |
591 | ||
592 | /* caller must hold a reference to intrfc and the skb has to be unshared */ | |
593 | int ipxitf_send(struct ipx_interface *intrfc, struct sk_buff *skb, char *node) | |
594 | { | |
595 | struct ipxhdr *ipx = ipx_hdr(skb); | |
596 | struct net_device *dev = intrfc->if_dev; | |
597 | struct datalink_proto *dl = intrfc->if_dlink; | |
598 | char dest_node[IPX_NODE_LEN]; | |
599 | int send_to_wire = 1; | |
600 | int addr_len; | |
601 | ||
602 | ipx->ipx_tctrl = IPX_SKB_CB(skb)->ipx_tctrl; | |
603 | ipx->ipx_dest.net = IPX_SKB_CB(skb)->ipx_dest_net; | |
604 | ipx->ipx_source.net = IPX_SKB_CB(skb)->ipx_source_net; | |
605 | ||
606 | /* see if we need to include the netnum in the route list */ | |
607 | if (IPX_SKB_CB(skb)->last_hop.index >= 0) { | |
4833ed09 | 608 | __be32 *last_hop = (__be32 *)(((u8 *) skb->data) + |
1da177e4 LT |
609 | sizeof(struct ipxhdr) + |
610 | IPX_SKB_CB(skb)->last_hop.index * | |
4833ed09 | 611 | sizeof(__be32)); |
1da177e4 LT |
612 | *last_hop = IPX_SKB_CB(skb)->last_hop.netnum; |
613 | IPX_SKB_CB(skb)->last_hop.index = -1; | |
614 | } | |
981c0ff6 YH |
615 | |
616 | /* | |
1da177e4 LT |
617 | * We need to know how many skbuffs it will take to send out this |
618 | * packet to avoid unnecessary copies. | |
619 | */ | |
981c0ff6 YH |
620 | |
621 | if (!dl || !dev || dev->flags & IFF_LOOPBACK) | |
1da177e4 LT |
622 | send_to_wire = 0; /* No non looped */ |
623 | ||
624 | /* | |
981c0ff6 | 625 | * See if this should be demuxed to sockets on this interface |
1da177e4 LT |
626 | * |
627 | * We want to ensure the original was eaten or that we only use | |
628 | * up clones. | |
629 | */ | |
981c0ff6 | 630 | |
1da177e4 LT |
631 | if (ipx->ipx_dest.net == intrfc->if_netnum) { |
632 | /* | |
633 | * To our own node, loop and free the original. | |
634 | * The internal net will receive on all node address. | |
635 | */ | |
636 | if (intrfc == ipx_internal_net || | |
637 | !memcmp(intrfc->if_node, node, IPX_NODE_LEN)) { | |
638 | /* Don't charge sender */ | |
639 | skb_orphan(skb); | |
640 | ||
641 | /* Will charge receiver */ | |
642 | return ipxitf_demux_socket(intrfc, skb, 0); | |
643 | } | |
644 | ||
645 | /* Broadcast, loop and possibly keep to send on. */ | |
646 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) { | |
647 | if (!send_to_wire) | |
648 | skb_orphan(skb); | |
649 | ipxitf_demux_socket(intrfc, skb, send_to_wire); | |
650 | if (!send_to_wire) | |
651 | goto out; | |
652 | } | |
653 | } | |
654 | ||
655 | /* | |
656 | * If the originating net is not equal to our net; this is routed | |
657 | * We are still charging the sender. Which is right - the driver | |
658 | * free will handle this fairly. | |
659 | */ | |
660 | if (ipx->ipx_source.net != intrfc->if_netnum) { | |
661 | /* | |
662 | * Unshare the buffer before modifying the count in | |
663 | * case it's a flood or tcpdump | |
664 | */ | |
665 | skb = skb_unshare(skb, GFP_ATOMIC); | |
666 | if (!skb) | |
667 | goto out; | |
668 | if (++ipx->ipx_tctrl > ipxcfg_max_hops) | |
669 | send_to_wire = 0; | |
670 | } | |
671 | ||
672 | if (!send_to_wire) { | |
673 | kfree_skb(skb); | |
674 | goto out; | |
675 | } | |
676 | ||
677 | /* Determine the appropriate hardware address */ | |
678 | addr_len = dev->addr_len; | |
679 | if (!memcmp(ipx_broadcast_node, node, IPX_NODE_LEN)) | |
680 | memcpy(dest_node, dev->broadcast, addr_len); | |
681 | else | |
682 | memcpy(dest_node, &(node[IPX_NODE_LEN-addr_len]), addr_len); | |
683 | ||
684 | /* Make any compensation for differing physical/data link size */ | |
685 | skb = ipxitf_adjust_skbuff(intrfc, skb); | |
686 | if (!skb) | |
687 | goto out; | |
688 | ||
689 | /* set up data link and physical headers */ | |
690 | skb->dev = dev; | |
691 | skb->protocol = htons(ETH_P_IPX); | |
692 | ||
693 | /* Send it out */ | |
694 | dl->request(dl, skb, dest_node); | |
695 | out: | |
696 | return 0; | |
697 | } | |
698 | ||
699 | static int ipxitf_add_local_route(struct ipx_interface *intrfc) | |
700 | { | |
701 | return ipxrtr_add_route(intrfc->if_netnum, intrfc, NULL); | |
702 | } | |
703 | ||
704 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
705 | struct sk_buff *skb); | |
706 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb); | |
707 | ||
708 | static int ipxitf_rcv(struct ipx_interface *intrfc, struct sk_buff *skb) | |
709 | { | |
710 | struct ipxhdr *ipx = ipx_hdr(skb); | |
711 | int rc = 0; | |
712 | ||
713 | ipxitf_hold(intrfc); | |
714 | ||
715 | /* See if we should update our network number */ | |
716 | if (!intrfc->if_netnum) /* net number of intrfc not known yet */ | |
981c0ff6 YH |
717 | ipxitf_discover_netnum(intrfc, skb); |
718 | ||
1da177e4 LT |
719 | IPX_SKB_CB(skb)->last_hop.index = -1; |
720 | if (ipx->ipx_type == IPX_TYPE_PPROP) { | |
721 | rc = ipxitf_pprop(intrfc, skb); | |
722 | if (rc) | |
723 | goto out_free_skb; | |
724 | } | |
725 | ||
726 | /* local processing follows */ | |
727 | if (!IPX_SKB_CB(skb)->ipx_dest_net) | |
728 | IPX_SKB_CB(skb)->ipx_dest_net = intrfc->if_netnum; | |
729 | if (!IPX_SKB_CB(skb)->ipx_source_net) | |
730 | IPX_SKB_CB(skb)->ipx_source_net = intrfc->if_netnum; | |
731 | ||
732 | /* it doesn't make sense to route a pprop packet, there's no meaning | |
733 | * in the ipx_dest_net for such packets */ | |
734 | if (ipx->ipx_type != IPX_TYPE_PPROP && | |
735 | intrfc->if_netnum != IPX_SKB_CB(skb)->ipx_dest_net) { | |
736 | /* We only route point-to-point packets. */ | |
737 | if (skb->pkt_type == PACKET_HOST) { | |
738 | skb = skb_unshare(skb, GFP_ATOMIC); | |
739 | if (skb) | |
740 | rc = ipxrtr_route_skb(skb); | |
741 | goto out_intrfc; | |
742 | } | |
743 | ||
744 | goto out_free_skb; | |
745 | } | |
746 | ||
747 | /* see if we should keep it */ | |
748 | if (!memcmp(ipx_broadcast_node, ipx->ipx_dest.node, IPX_NODE_LEN) || | |
749 | !memcmp(intrfc->if_node, ipx->ipx_dest.node, IPX_NODE_LEN)) { | |
750 | rc = ipxitf_demux_socket(intrfc, skb, 0); | |
751 | goto out_intrfc; | |
752 | } | |
753 | ||
754 | /* we couldn't pawn it off so unload it */ | |
755 | out_free_skb: | |
756 | kfree_skb(skb); | |
757 | out_intrfc: | |
758 | ipxitf_put(intrfc); | |
759 | return rc; | |
760 | } | |
761 | ||
762 | static void ipxitf_discover_netnum(struct ipx_interface *intrfc, | |
763 | struct sk_buff *skb) | |
981c0ff6 | 764 | { |
1da177e4 LT |
765 | const struct ipx_cb *cb = IPX_SKB_CB(skb); |
766 | ||
767 | /* see if this is an intra packet: source_net == dest_net */ | |
768 | if (cb->ipx_source_net == cb->ipx_dest_net && cb->ipx_source_net) { | |
769 | struct ipx_interface *i = | |
770 | ipxitf_find_using_net(cb->ipx_source_net); | |
771 | /* NB: NetWare servers lie about their hop count so we | |
772 | * dropped the test based on it. This is the best way | |
773 | * to determine this is a 0 hop count packet. */ | |
774 | if (!i) { | |
775 | intrfc->if_netnum = cb->ipx_source_net; | |
776 | ipxitf_add_local_route(intrfc); | |
777 | } else { | |
778 | printk(KERN_WARNING "IPX: Network number collision " | |
779 | "%lx\n %s %s and %s %s\n", | |
4833ed09 | 780 | (unsigned long) ntohl(cb->ipx_source_net), |
1da177e4 LT |
781 | ipx_device_name(i), |
782 | ipx_frame_name(i->if_dlink_type), | |
783 | ipx_device_name(intrfc), | |
784 | ipx_frame_name(intrfc->if_dlink_type)); | |
785 | ipxitf_put(i); | |
786 | } | |
787 | } | |
788 | } | |
789 | ||
790 | /** | |
791 | * ipxitf_pprop - Process packet propagation IPX packet type 0x14, used for | |
792 | * NetBIOS broadcasts | |
793 | * @intrfc: IPX interface receiving this packet | |
794 | * @skb: Received packet | |
795 | * | |
796 | * Checks if packet is valid: if its more than %IPX_MAX_PPROP_HOPS hops or if it | |
797 | * is smaller than a IPX header + the room for %IPX_MAX_PPROP_HOPS hops we drop | |
798 | * it, not even processing it locally, if it has exact %IPX_MAX_PPROP_HOPS we | |
799 | * don't broadcast it, but process it locally. See chapter 5 of Novell's "IPX | |
800 | * RIP and SAP Router Specification", Part Number 107-000029-001. | |
981c0ff6 | 801 | * |
1da177e4 LT |
802 | * If it is valid, check if we have pprop broadcasting enabled by the user, |
803 | * if not, just return zero for local processing. | |
804 | * | |
805 | * If it is enabled check the packet and don't broadcast it if we have already | |
806 | * seen this packet. | |
807 | * | |
808 | * Broadcast: send it to the interfaces that aren't on the packet visited nets | |
809 | * array, just after the IPX header. | |
810 | * | |
811 | * Returns -EINVAL for invalid packets, so that the calling function drops | |
812 | * the packet without local processing. 0 if packet is to be locally processed. | |
813 | */ | |
814 | static int ipxitf_pprop(struct ipx_interface *intrfc, struct sk_buff *skb) | |
815 | { | |
816 | struct ipxhdr *ipx = ipx_hdr(skb); | |
817 | int i, rc = -EINVAL; | |
818 | struct ipx_interface *ifcs; | |
819 | char *c; | |
4833ed09 | 820 | __be32 *l; |
1da177e4 LT |
821 | |
822 | /* Illegal packet - too many hops or too short */ | |
823 | /* We decide to throw it away: no broadcasting, no local processing. | |
824 | * NetBIOS unaware implementations route them as normal packets - | |
825 | * tctrl <= 15, any data payload... */ | |
826 | if (IPX_SKB_CB(skb)->ipx_tctrl > IPX_MAX_PPROP_HOPS || | |
827 | ntohs(ipx->ipx_pktsize) < sizeof(struct ipxhdr) + | |
981c0ff6 | 828 | IPX_MAX_PPROP_HOPS * sizeof(u32)) |
1da177e4 LT |
829 | goto out; |
830 | /* are we broadcasting this damn thing? */ | |
831 | rc = 0; | |
832 | if (!sysctl_ipx_pprop_broadcasting) | |
833 | goto out; | |
834 | /* We do broadcast packet on the IPX_MAX_PPROP_HOPS hop, but we | |
835 | * process it locally. All previous hops broadcasted it, and process it | |
836 | * locally. */ | |
837 | if (IPX_SKB_CB(skb)->ipx_tctrl == IPX_MAX_PPROP_HOPS) | |
838 | goto out; | |
981c0ff6 | 839 | |
1da177e4 | 840 | c = ((u8 *) ipx) + sizeof(struct ipxhdr); |
4833ed09 | 841 | l = (__be32 *) c; |
1da177e4 LT |
842 | |
843 | /* Don't broadcast packet if already seen this net */ | |
844 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
845 | if (*l++ == intrfc->if_netnum) | |
846 | goto out; | |
847 | ||
848 | /* < IPX_MAX_PPROP_HOPS hops && input interface not in list. Save the | |
849 | * position where we will insert recvd netnum into list, later on, | |
850 | * in ipxitf_send */ | |
851 | IPX_SKB_CB(skb)->last_hop.index = i; | |
852 | IPX_SKB_CB(skb)->last_hop.netnum = intrfc->if_netnum; | |
853 | /* xmit on all other interfaces... */ | |
854 | spin_lock_bh(&ipx_interfaces_lock); | |
855 | list_for_each_entry(ifcs, &ipx_interfaces, node) { | |
856 | /* Except unconfigured interfaces */ | |
857 | if (!ifcs->if_netnum) | |
858 | continue; | |
981c0ff6 | 859 | |
1da177e4 LT |
860 | /* That aren't in the list */ |
861 | if (ifcs == intrfc) | |
862 | continue; | |
4833ed09 | 863 | l = (__be32 *) c; |
1da177e4 LT |
864 | /* don't consider the last entry in the packet list, |
865 | * it is our netnum, and it is not there yet */ | |
866 | for (i = 0; i < IPX_SKB_CB(skb)->ipx_tctrl; i++) | |
867 | if (ifcs->if_netnum == *l++) | |
868 | break; | |
869 | if (i == IPX_SKB_CB(skb)->ipx_tctrl) { | |
870 | struct sk_buff *s = skb_copy(skb, GFP_ATOMIC); | |
871 | ||
872 | if (s) { | |
873 | IPX_SKB_CB(s)->ipx_dest_net = ifcs->if_netnum; | |
874 | ipxrtr_route_skb(s); | |
875 | } | |
876 | } | |
877 | } | |
878 | spin_unlock_bh(&ipx_interfaces_lock); | |
879 | out: | |
880 | return rc; | |
881 | } | |
882 | ||
883 | static void ipxitf_insert(struct ipx_interface *intrfc) | |
884 | { | |
885 | spin_lock_bh(&ipx_interfaces_lock); | |
886 | list_add_tail(&intrfc->node, &ipx_interfaces); | |
887 | spin_unlock_bh(&ipx_interfaces_lock); | |
888 | ||
889 | if (ipxcfg_auto_select_primary && !ipx_primary_net) | |
890 | ipx_primary_net = intrfc; | |
891 | } | |
892 | ||
4833ed09 AV |
893 | static struct ipx_interface *ipxitf_alloc(struct net_device *dev, __be32 netnum, |
894 | __be16 dlink_type, | |
1da177e4 LT |
895 | struct datalink_proto *dlink, |
896 | unsigned char internal, | |
897 | int ipx_offset) | |
898 | { | |
899 | struct ipx_interface *intrfc = kmalloc(sizeof(*intrfc), GFP_ATOMIC); | |
900 | ||
901 | if (intrfc) { | |
902 | intrfc->if_dev = dev; | |
903 | intrfc->if_netnum = netnum; | |
904 | intrfc->if_dlink_type = dlink_type; | |
905 | intrfc->if_dlink = dlink; | |
906 | intrfc->if_internal = internal; | |
907 | intrfc->if_ipx_offset = ipx_offset; | |
908 | intrfc->if_sknum = IPX_MIN_EPHEMERAL_SOCKET; | |
909 | INIT_HLIST_HEAD(&intrfc->if_sklist); | |
910 | atomic_set(&intrfc->refcnt, 1); | |
911 | spin_lock_init(&intrfc->if_sklist_lock); | |
912 | } | |
913 | ||
914 | return intrfc; | |
915 | } | |
916 | ||
917 | static int ipxitf_create_internal(struct ipx_interface_definition *idef) | |
918 | { | |
919 | struct ipx_interface *intrfc; | |
920 | int rc = -EEXIST; | |
921 | ||
922 | /* Only one primary network allowed */ | |
923 | if (ipx_primary_net) | |
924 | goto out; | |
925 | ||
926 | /* Must have a valid network number */ | |
927 | rc = -EADDRNOTAVAIL; | |
928 | if (!idef->ipx_network) | |
929 | goto out; | |
930 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
931 | rc = -EADDRINUSE; | |
932 | if (intrfc) { | |
933 | ipxitf_put(intrfc); | |
934 | goto out; | |
935 | } | |
936 | intrfc = ipxitf_alloc(NULL, idef->ipx_network, 0, NULL, 1, 0); | |
937 | rc = -EAGAIN; | |
938 | if (!intrfc) | |
939 | goto out; | |
940 | memcpy((char *)&(intrfc->if_node), idef->ipx_node, IPX_NODE_LEN); | |
941 | ipx_internal_net = ipx_primary_net = intrfc; | |
942 | ipxitf_hold(intrfc); | |
943 | ipxitf_insert(intrfc); | |
944 | ||
945 | rc = ipxitf_add_local_route(intrfc); | |
946 | ipxitf_put(intrfc); | |
947 | out: | |
948 | return rc; | |
949 | } | |
950 | ||
4ac396c0 | 951 | static __be16 ipx_map_frame_type(unsigned char type) |
1da177e4 | 952 | { |
4ac396c0 | 953 | __be16 rc = 0; |
1da177e4 LT |
954 | |
955 | switch (type) { | |
956 | case IPX_FRAME_ETHERII: rc = htons(ETH_P_IPX); break; | |
957 | case IPX_FRAME_8022: rc = htons(ETH_P_802_2); break; | |
958 | case IPX_FRAME_SNAP: rc = htons(ETH_P_SNAP); break; | |
959 | case IPX_FRAME_8023: rc = htons(ETH_P_802_3); break; | |
960 | } | |
961 | ||
962 | return rc; | |
963 | } | |
964 | ||
965 | static int ipxitf_create(struct ipx_interface_definition *idef) | |
966 | { | |
967 | struct net_device *dev; | |
4833ed09 | 968 | __be16 dlink_type = 0; |
1da177e4 LT |
969 | struct datalink_proto *datalink = NULL; |
970 | struct ipx_interface *intrfc; | |
971 | int rc; | |
972 | ||
973 | if (idef->ipx_special == IPX_INTERNAL) { | |
974 | rc = ipxitf_create_internal(idef); | |
975 | goto out; | |
976 | } | |
977 | ||
978 | rc = -EEXIST; | |
979 | if (idef->ipx_special == IPX_PRIMARY && ipx_primary_net) | |
980 | goto out; | |
981 | ||
982 | intrfc = ipxitf_find_using_net(idef->ipx_network); | |
983 | rc = -EADDRINUSE; | |
984 | if (idef->ipx_network && intrfc) { | |
985 | ipxitf_put(intrfc); | |
986 | goto out; | |
987 | } | |
988 | ||
989 | if (intrfc) | |
990 | ipxitf_put(intrfc); | |
991 | ||
992 | dev = dev_get_by_name(idef->ipx_device); | |
993 | rc = -ENODEV; | |
994 | if (!dev) | |
995 | goto out; | |
996 | ||
997 | switch (idef->ipx_dlink_type) { | |
998 | case IPX_FRAME_TR_8022: | |
999 | printk(KERN_WARNING "IPX frame type 802.2TR is " | |
1000 | "obsolete Use 802.2 instead.\n"); | |
1001 | /* fall through */ | |
1002 | case IPX_FRAME_8022: | |
1003 | dlink_type = htons(ETH_P_802_2); | |
1004 | datalink = p8022_datalink; | |
1005 | break; | |
1006 | case IPX_FRAME_ETHERII: | |
1007 | if (dev->type != ARPHRD_IEEE802) { | |
1008 | dlink_type = htons(ETH_P_IPX); | |
1009 | datalink = pEII_datalink; | |
1010 | break; | |
981c0ff6 | 1011 | } else |
1da177e4 LT |
1012 | printk(KERN_WARNING "IPX frame type EtherII over " |
1013 | "token-ring is obsolete. Use SNAP " | |
1014 | "instead.\n"); | |
1015 | /* fall through */ | |
1016 | case IPX_FRAME_SNAP: | |
1017 | dlink_type = htons(ETH_P_SNAP); | |
1018 | datalink = pSNAP_datalink; | |
1019 | break; | |
1020 | case IPX_FRAME_8023: | |
1021 | dlink_type = htons(ETH_P_802_3); | |
1022 | datalink = p8023_datalink; | |
1023 | break; | |
1024 | case IPX_FRAME_NONE: | |
1025 | default: | |
1026 | rc = -EPROTONOSUPPORT; | |
1027 | goto out_dev; | |
1028 | } | |
1029 | ||
1030 | rc = -ENETDOWN; | |
1031 | if (!(dev->flags & IFF_UP)) | |
1032 | goto out_dev; | |
1033 | ||
1034 | /* Check addresses are suitable */ | |
1035 | rc = -EINVAL; | |
1036 | if (dev->addr_len > IPX_NODE_LEN) | |
1037 | goto out_dev; | |
1038 | ||
1039 | intrfc = ipxitf_find_using_phys(dev, dlink_type); | |
1040 | if (!intrfc) { | |
1041 | /* Ok now create */ | |
1042 | intrfc = ipxitf_alloc(dev, idef->ipx_network, dlink_type, | |
1043 | datalink, 0, dev->hard_header_len + | |
1044 | datalink->header_length); | |
1045 | rc = -EAGAIN; | |
1046 | if (!intrfc) | |
1047 | goto out_dev; | |
1048 | /* Setup primary if necessary */ | |
1049 | if (idef->ipx_special == IPX_PRIMARY) | |
1050 | ipx_primary_net = intrfc; | |
1051 | if (!memcmp(idef->ipx_node, "\000\000\000\000\000\000", | |
1052 | IPX_NODE_LEN)) { | |
1053 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1054 | memcpy(intrfc->if_node + IPX_NODE_LEN - dev->addr_len, | |
1055 | dev->dev_addr, dev->addr_len); | |
1056 | } else | |
1057 | memcpy(intrfc->if_node, idef->ipx_node, IPX_NODE_LEN); | |
1058 | ipxitf_hold(intrfc); | |
1059 | ipxitf_insert(intrfc); | |
1060 | } | |
1061 | ||
1062 | ||
1063 | /* If the network number is known, add a route */ | |
1064 | rc = 0; | |
1065 | if (!intrfc->if_netnum) | |
1066 | goto out_intrfc; | |
1067 | ||
1068 | rc = ipxitf_add_local_route(intrfc); | |
1069 | out_intrfc: | |
1070 | ipxitf_put(intrfc); | |
1071 | goto out; | |
1072 | out_dev: | |
1073 | dev_put(dev); | |
1074 | out: | |
1075 | return rc; | |
1076 | } | |
1077 | ||
1078 | static int ipxitf_delete(struct ipx_interface_definition *idef) | |
1079 | { | |
1080 | struct net_device *dev = NULL; | |
4833ed09 | 1081 | __be16 dlink_type = 0; |
1da177e4 LT |
1082 | struct ipx_interface *intrfc; |
1083 | int rc = 0; | |
1084 | ||
1085 | spin_lock_bh(&ipx_interfaces_lock); | |
1086 | if (idef->ipx_special == IPX_INTERNAL) { | |
1087 | if (ipx_internal_net) { | |
1088 | __ipxitf_put(ipx_internal_net); | |
1089 | goto out; | |
1090 | } | |
1091 | rc = -ENOENT; | |
1092 | goto out; | |
1093 | } | |
1094 | ||
1095 | dlink_type = ipx_map_frame_type(idef->ipx_dlink_type); | |
1096 | rc = -EPROTONOSUPPORT; | |
1097 | if (!dlink_type) | |
1098 | goto out; | |
1099 | ||
1100 | dev = __dev_get_by_name(idef->ipx_device); | |
1101 | rc = -ENODEV; | |
1102 | if (!dev) | |
1103 | goto out; | |
1104 | ||
1105 | intrfc = __ipxitf_find_using_phys(dev, dlink_type); | |
1106 | rc = -EINVAL; | |
1107 | if (!intrfc) | |
1108 | goto out; | |
1109 | __ipxitf_put(intrfc); | |
1110 | ||
1111 | rc = 0; | |
1112 | out: | |
1113 | spin_unlock_bh(&ipx_interfaces_lock); | |
1114 | return rc; | |
1115 | } | |
1116 | ||
1117 | static struct ipx_interface *ipxitf_auto_create(struct net_device *dev, | |
4833ed09 | 1118 | __be16 dlink_type) |
1da177e4 LT |
1119 | { |
1120 | struct ipx_interface *intrfc = NULL; | |
1121 | struct datalink_proto *datalink; | |
1122 | ||
1123 | if (!dev) | |
1124 | goto out; | |
1125 | ||
1126 | /* Check addresses are suitable */ | |
1127 | if (dev->addr_len > IPX_NODE_LEN) | |
1128 | goto out; | |
1129 | ||
4833ed09 | 1130 | switch (ntohs(dlink_type)) { |
1da177e4 LT |
1131 | case ETH_P_IPX: datalink = pEII_datalink; break; |
1132 | case ETH_P_802_2: datalink = p8022_datalink; break; | |
1133 | case ETH_P_SNAP: datalink = pSNAP_datalink; break; | |
1134 | case ETH_P_802_3: datalink = p8023_datalink; break; | |
1135 | default: goto out; | |
1136 | } | |
1137 | ||
1138 | intrfc = ipxitf_alloc(dev, 0, dlink_type, datalink, 0, | |
1139 | dev->hard_header_len + datalink->header_length); | |
1140 | ||
1141 | if (intrfc) { | |
1142 | memset(intrfc->if_node, 0, IPX_NODE_LEN); | |
1143 | memcpy((char *)&(intrfc->if_node[IPX_NODE_LEN-dev->addr_len]), | |
1144 | dev->dev_addr, dev->addr_len); | |
1145 | spin_lock_init(&intrfc->if_sklist_lock); | |
1146 | atomic_set(&intrfc->refcnt, 1); | |
1147 | ipxitf_insert(intrfc); | |
1148 | dev_hold(dev); | |
1149 | } | |
1150 | ||
1151 | out: | |
1152 | return intrfc; | |
1153 | } | |
1154 | ||
1155 | static int ipxitf_ioctl(unsigned int cmd, void __user *arg) | |
1156 | { | |
1157 | int rc = -EINVAL; | |
1158 | struct ifreq ifr; | |
1159 | int val; | |
1160 | ||
1161 | switch (cmd) { | |
1162 | case SIOCSIFADDR: { | |
1163 | struct sockaddr_ipx *sipx; | |
1164 | struct ipx_interface_definition f; | |
1165 | ||
1166 | rc = -EFAULT; | |
1167 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1168 | break; | |
1169 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
1170 | rc = -EINVAL; | |
1171 | if (sipx->sipx_family != AF_IPX) | |
1172 | break; | |
1173 | f.ipx_network = sipx->sipx_network; | |
1174 | memcpy(f.ipx_device, ifr.ifr_name, | |
1175 | sizeof(f.ipx_device)); | |
1176 | memcpy(f.ipx_node, sipx->sipx_node, IPX_NODE_LEN); | |
1177 | f.ipx_dlink_type = sipx->sipx_type; | |
1178 | f.ipx_special = sipx->sipx_special; | |
1179 | ||
1180 | if (sipx->sipx_action == IPX_DLTITF) | |
1181 | rc = ipxitf_delete(&f); | |
1182 | else | |
1183 | rc = ipxitf_create(&f); | |
1184 | break; | |
1185 | } | |
1186 | case SIOCGIFADDR: { | |
1187 | struct sockaddr_ipx *sipx; | |
1188 | struct ipx_interface *ipxif; | |
1189 | struct net_device *dev; | |
1190 | ||
1191 | rc = -EFAULT; | |
1192 | if (copy_from_user(&ifr, arg, sizeof(ifr))) | |
1193 | break; | |
1194 | sipx = (struct sockaddr_ipx *)&ifr.ifr_addr; | |
1195 | dev = __dev_get_by_name(ifr.ifr_name); | |
1196 | rc = -ENODEV; | |
1197 | if (!dev) | |
1198 | break; | |
1199 | ipxif = ipxitf_find_using_phys(dev, | |
1200 | ipx_map_frame_type(sipx->sipx_type)); | |
1201 | rc = -EADDRNOTAVAIL; | |
1202 | if (!ipxif) | |
1203 | break; | |
1204 | ||
1205 | sipx->sipx_family = AF_IPX; | |
1206 | sipx->sipx_network = ipxif->if_netnum; | |
1207 | memcpy(sipx->sipx_node, ipxif->if_node, | |
1208 | sizeof(sipx->sipx_node)); | |
1209 | rc = -EFAULT; | |
1210 | if (copy_to_user(arg, &ifr, sizeof(ifr))) | |
1211 | break; | |
1212 | ipxitf_put(ipxif); | |
1213 | rc = 0; | |
1214 | break; | |
1215 | } | |
981c0ff6 | 1216 | case SIOCAIPXITFCRT: |
1da177e4 LT |
1217 | rc = -EFAULT; |
1218 | if (get_user(val, (unsigned char __user *) arg)) | |
1219 | break; | |
1220 | rc = 0; | |
1221 | ipxcfg_auto_create_interfaces = val; | |
1222 | break; | |
981c0ff6 | 1223 | case SIOCAIPXPRISLT: |
1da177e4 LT |
1224 | rc = -EFAULT; |
1225 | if (get_user(val, (unsigned char __user *) arg)) | |
1226 | break; | |
1227 | rc = 0; | |
1228 | ipxcfg_set_auto_select(val); | |
1229 | break; | |
1230 | } | |
1231 | ||
1232 | return rc; | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * Checksum routine for IPX | |
1237 | */ | |
981c0ff6 | 1238 | |
1da177e4 LT |
1239 | /* Note: We assume ipx_tctrl==0 and htons(length)==ipx_pktsize */ |
1240 | /* This functions should *not* mess with packet contents */ | |
1241 | ||
02e60370 | 1242 | __be16 ipx_cksum(struct ipxhdr *packet, int length) |
1da177e4 | 1243 | { |
981c0ff6 YH |
1244 | /* |
1245 | * NOTE: sum is a net byte order quantity, which optimizes the | |
1da177e4 LT |
1246 | * loop. This only works on big and little endian machines. (I |
1247 | * don't know of a machine that isn't.) | |
1248 | */ | |
02e60370 AV |
1249 | /* handle the first 3 words separately; checksum should be skipped |
1250 | * and ipx_tctrl masked out */ | |
1251 | __u16 *p = (__u16 *)packet; | |
1252 | __u32 sum = p[1] + (p[2] & (__force u16)htons(0x00ff)); | |
1253 | __u32 i = (length >> 1) - 3; /* Number of remaining complete words */ | |
1254 | ||
1255 | /* Loop through them */ | |
1256 | p += 3; | |
1257 | while (i--) | |
1da177e4 LT |
1258 | sum += *p++; |
1259 | ||
1260 | /* Add on the last part word if it exists */ | |
1261 | if (packet->ipx_pktsize & htons(1)) | |
02e60370 | 1262 | sum += (__force u16)htons(0xff00) & *p; |
1da177e4 LT |
1263 | |
1264 | /* Do final fixup */ | |
1265 | sum = (sum & 0xffff) + (sum >> 16); | |
1266 | ||
1267 | /* It's a pity there's no concept of carry in C */ | |
1268 | if (sum >= 0x10000) | |
1269 | sum++; | |
1270 | ||
02e60370 AV |
1271 | /* |
1272 | * Leave 0 alone; we don't want 0xffff here. Note that we can't get | |
1273 | * here with 0x10000, so this check is the same as ((__u16)sum) | |
1274 | */ | |
1275 | if (sum) | |
1276 | sum = ~sum; | |
1277 | ||
1278 | return (__force __be16)sum; | |
1da177e4 LT |
1279 | } |
1280 | ||
4833ed09 | 1281 | const char *ipx_frame_name(__be16 frame) |
1da177e4 LT |
1282 | { |
1283 | char* rc = "None"; | |
1284 | ||
1285 | switch (ntohs(frame)) { | |
1286 | case ETH_P_IPX: rc = "EtherII"; break; | |
1287 | case ETH_P_802_2: rc = "802.2"; break; | |
1288 | case ETH_P_SNAP: rc = "SNAP"; break; | |
1289 | case ETH_P_802_3: rc = "802.3"; break; | |
1290 | case ETH_P_TR_802_2: rc = "802.2TR"; break; | |
1291 | } | |
1292 | ||
1293 | return rc; | |
1294 | } | |
1295 | ||
1296 | const char *ipx_device_name(struct ipx_interface *intrfc) | |
1297 | { | |
1298 | return intrfc->if_internal ? "Internal" : | |
1299 | intrfc->if_dev ? intrfc->if_dev->name : "Unknown"; | |
1300 | } | |
1301 | ||
1302 | /* Handling for system calls applied via the various interfaces to an IPX | |
1303 | * socket object. */ | |
1304 | ||
1305 | static int ipx_setsockopt(struct socket *sock, int level, int optname, | |
1306 | char __user *optval, int optlen) | |
1307 | { | |
1308 | struct sock *sk = sock->sk; | |
1309 | int opt; | |
1310 | int rc = -EINVAL; | |
1311 | ||
1312 | if (optlen != sizeof(int)) | |
1313 | goto out; | |
1314 | ||
1315 | rc = -EFAULT; | |
1316 | if (get_user(opt, (unsigned int __user *)optval)) | |
1317 | goto out; | |
1318 | ||
1319 | rc = -ENOPROTOOPT; | |
1320 | if (!(level == SOL_IPX && optname == IPX_TYPE)) | |
1321 | goto out; | |
1322 | ||
1323 | ipx_sk(sk)->type = opt; | |
1324 | rc = 0; | |
1325 | out: | |
1326 | return rc; | |
1327 | } | |
1328 | ||
1329 | static int ipx_getsockopt(struct socket *sock, int level, int optname, | |
1330 | char __user *optval, int __user *optlen) | |
1331 | { | |
1332 | struct sock *sk = sock->sk; | |
1333 | int val = 0; | |
1334 | int len; | |
1335 | int rc = -ENOPROTOOPT; | |
1336 | ||
1337 | if (!(level == SOL_IPX && optname == IPX_TYPE)) | |
1338 | goto out; | |
1339 | ||
1340 | val = ipx_sk(sk)->type; | |
1341 | ||
1342 | rc = -EFAULT; | |
1343 | if (get_user(len, optlen)) | |
1344 | goto out; | |
1345 | ||
1346 | len = min_t(unsigned int, len, sizeof(int)); | |
1347 | rc = -EINVAL; | |
1348 | if(len < 0) | |
1349 | goto out; | |
981c0ff6 | 1350 | |
1da177e4 LT |
1351 | rc = -EFAULT; |
1352 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) | |
1353 | goto out; | |
1354 | ||
1355 | rc = 0; | |
1356 | out: | |
1357 | return rc; | |
1358 | } | |
1359 | ||
1360 | static struct proto ipx_proto = { | |
1361 | .name = "IPX", | |
1362 | .owner = THIS_MODULE, | |
1363 | .obj_size = sizeof(struct ipx_sock), | |
1364 | }; | |
1365 | ||
1b8d7ae4 | 1366 | static int ipx_create(struct net *net, struct socket *sock, int protocol) |
1da177e4 LT |
1367 | { |
1368 | int rc = -ESOCKTNOSUPPORT; | |
1369 | struct sock *sk; | |
1370 | ||
1b8d7ae4 EB |
1371 | if (net != &init_net) |
1372 | return -EAFNOSUPPORT; | |
1373 | ||
1da177e4 LT |
1374 | /* |
1375 | * SPX support is not anymore in the kernel sources. If you want to | |
1376 | * ressurrect it, completing it and making it understand shared skbs, | |
1377 | * be fully multithreaded, etc, grab the sources in an early 2.5 kernel | |
1378 | * tree. | |
1379 | */ | |
1380 | if (sock->type != SOCK_DGRAM) | |
1381 | goto out; | |
1382 | ||
981c0ff6 | 1383 | rc = -ENOMEM; |
1b8d7ae4 | 1384 | sk = sk_alloc(net, PF_IPX, GFP_KERNEL, &ipx_proto, 1); |
1da177e4 LT |
1385 | if (!sk) |
1386 | goto out; | |
1387 | #ifdef IPX_REFCNT_DEBUG | |
981c0ff6 YH |
1388 | atomic_inc(&ipx_sock_nr); |
1389 | printk(KERN_DEBUG "IPX socket %p created, now we have %d alive\n", sk, | |
1da177e4 LT |
1390 | atomic_read(&ipx_sock_nr)); |
1391 | #endif | |
1392 | sock_init_data(sock, sk); | |
1393 | sk->sk_no_check = 1; /* Checksum off by default */ | |
1394 | sock->ops = &ipx_dgram_ops; | |
1395 | rc = 0; | |
1396 | out: | |
1397 | return rc; | |
1398 | } | |
1399 | ||
1400 | static int ipx_release(struct socket *sock) | |
1401 | { | |
1402 | struct sock *sk = sock->sk; | |
1403 | ||
1404 | if (!sk) | |
1405 | goto out; | |
1406 | ||
1407 | if (!sock_flag(sk, SOCK_DEAD)) | |
1408 | sk->sk_state_change(sk); | |
1409 | ||
1410 | sock_set_flag(sk, SOCK_DEAD); | |
1411 | sock->sk = NULL; | |
1412 | ipx_destroy_socket(sk); | |
1413 | out: | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | /* caller must hold a reference to intrfc */ | |
1418 | ||
4833ed09 | 1419 | static __be16 ipx_first_free_socketnum(struct ipx_interface *intrfc) |
1da177e4 LT |
1420 | { |
1421 | unsigned short socketNum = intrfc->if_sknum; | |
1422 | ||
1423 | spin_lock_bh(&intrfc->if_sklist_lock); | |
1424 | ||
1425 | if (socketNum < IPX_MIN_EPHEMERAL_SOCKET) | |
1426 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1427 | ||
4833ed09 | 1428 | while (__ipxitf_find_socket(intrfc, htons(socketNum))) |
1da177e4 LT |
1429 | if (socketNum > IPX_MAX_EPHEMERAL_SOCKET) |
1430 | socketNum = IPX_MIN_EPHEMERAL_SOCKET; | |
1431 | else | |
1432 | socketNum++; | |
1433 | ||
1434 | spin_unlock_bh(&intrfc->if_sklist_lock); | |
1435 | intrfc->if_sknum = socketNum; | |
1436 | ||
4833ed09 | 1437 | return htons(socketNum); |
1da177e4 LT |
1438 | } |
1439 | ||
1440 | static int ipx_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
1441 | { | |
1442 | struct sock *sk = sock->sk; | |
1443 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1444 | struct ipx_interface *intrfc; | |
1445 | struct sockaddr_ipx *addr = (struct sockaddr_ipx *)uaddr; | |
1446 | int rc = -EINVAL; | |
1447 | ||
1448 | if (!sock_flag(sk, SOCK_ZAPPED) || addr_len != sizeof(struct sockaddr_ipx)) | |
1449 | goto out; | |
1450 | ||
1451 | intrfc = ipxitf_find_using_net(addr->sipx_network); | |
1452 | rc = -EADDRNOTAVAIL; | |
1453 | if (!intrfc) | |
1454 | goto out; | |
1455 | ||
1456 | if (!addr->sipx_port) { | |
1457 | addr->sipx_port = ipx_first_free_socketnum(intrfc); | |
1458 | rc = -EINVAL; | |
1459 | if (!addr->sipx_port) | |
1460 | goto out_put; | |
1461 | } | |
1462 | ||
1463 | /* protect IPX system stuff like routing/sap */ | |
1464 | rc = -EACCES; | |
1465 | if (ntohs(addr->sipx_port) < IPX_MIN_EPHEMERAL_SOCKET && | |
1466 | !capable(CAP_NET_ADMIN)) | |
1467 | goto out_put; | |
1468 | ||
1469 | ipxs->port = addr->sipx_port; | |
1470 | ||
1471 | #ifdef CONFIG_IPX_INTERN | |
1472 | if (intrfc == ipx_internal_net) { | |
1473 | /* The source address is to be set explicitly if the | |
1474 | * socket is to be bound on the internal network. If a | |
1475 | * node number 0 was specified, the default is used. | |
1476 | */ | |
1477 | ||
1478 | rc = -EINVAL; | |
1479 | if (!memcmp(addr->sipx_node, ipx_broadcast_node, IPX_NODE_LEN)) | |
1480 | goto out_put; | |
1481 | if (!memcmp(addr->sipx_node, ipx_this_node, IPX_NODE_LEN)) | |
1482 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1483 | else | |
1484 | memcpy(ipxs->node, addr->sipx_node, IPX_NODE_LEN); | |
1485 | ||
1486 | rc = -EADDRINUSE; | |
1487 | if (ipxitf_find_internal_socket(intrfc, ipxs->node, | |
1488 | ipxs->port)) { | |
1489 | SOCK_DEBUG(sk, | |
1490 | "IPX: bind failed because port %X in use.\n", | |
4833ed09 | 1491 | ntohs(addr->sipx_port)); |
1da177e4 LT |
1492 | goto out_put; |
1493 | } | |
1494 | } else { | |
1495 | /* Source addresses are easy. It must be our | |
1496 | * network:node pair for an interface routed to IPX | |
1497 | * with the ipx routing ioctl() | |
1498 | */ | |
1499 | ||
1500 | memcpy(ipxs->node, intrfc->if_node, IPX_NODE_LEN); | |
1501 | ||
1502 | rc = -EADDRINUSE; | |
1503 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1504 | SOCK_DEBUG(sk, | |
1505 | "IPX: bind failed because port %X in use.\n", | |
4833ed09 | 1506 | ntohs(addr->sipx_port)); |
1da177e4 LT |
1507 | goto out_put; |
1508 | } | |
1509 | } | |
1510 | ||
1511 | #else /* !def CONFIG_IPX_INTERN */ | |
1512 | ||
1513 | /* Source addresses are easy. It must be our network:node pair for | |
1514 | an interface routed to IPX with the ipx routing ioctl() */ | |
1515 | ||
1516 | rc = -EADDRINUSE; | |
1517 | if (ipxitf_find_socket(intrfc, addr->sipx_port)) { | |
1518 | SOCK_DEBUG(sk, "IPX: bind failed because port %X in use.\n", | |
1519 | ntohs((int)addr->sipx_port)); | |
1520 | goto out_put; | |
1521 | } | |
1522 | ||
1523 | #endif /* CONFIG_IPX_INTERN */ | |
1524 | ||
1525 | ipxitf_insert_socket(intrfc, sk); | |
1526 | sock_reset_flag(sk, SOCK_ZAPPED); | |
1527 | ||
1528 | rc = 0; | |
1529 | out_put: | |
1530 | ipxitf_put(intrfc); | |
1531 | out: | |
1532 | return rc; | |
1533 | } | |
1534 | ||
1535 | static int ipx_connect(struct socket *sock, struct sockaddr *uaddr, | |
1536 | int addr_len, int flags) | |
1537 | { | |
1538 | struct sock *sk = sock->sk; | |
1539 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1540 | struct sockaddr_ipx *addr; | |
1541 | int rc = -EINVAL; | |
1542 | struct ipx_route *rt; | |
1543 | ||
1544 | sk->sk_state = TCP_CLOSE; | |
1545 | sock->state = SS_UNCONNECTED; | |
1546 | ||
1547 | if (addr_len != sizeof(*addr)) | |
1548 | goto out; | |
1549 | addr = (struct sockaddr_ipx *)uaddr; | |
1550 | ||
1551 | /* put the autobinding in */ | |
1552 | if (!ipxs->port) { | |
1553 | struct sockaddr_ipx uaddr; | |
1554 | ||
1555 | uaddr.sipx_port = 0; | |
1556 | uaddr.sipx_network = 0; | |
1557 | ||
1558 | #ifdef CONFIG_IPX_INTERN | |
1559 | rc = -ENETDOWN; | |
1560 | if (!ipxs->intrfc) | |
1561 | goto out; /* Someone zonked the iface */ | |
1562 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1563 | IPX_NODE_LEN); | |
1564 | #endif /* CONFIG_IPX_INTERN */ | |
1565 | ||
1566 | rc = ipx_bind(sock, (struct sockaddr *)&uaddr, | |
1567 | sizeof(struct sockaddr_ipx)); | |
1568 | if (rc) | |
1569 | goto out; | |
1570 | } | |
1571 | ||
981c0ff6 | 1572 | /* We can either connect to primary network or somewhere |
1da177e4 LT |
1573 | * we can route to */ |
1574 | rt = ipxrtr_lookup(addr->sipx_network); | |
1575 | rc = -ENETUNREACH; | |
1576 | if (!rt && !(!addr->sipx_network && ipx_primary_net)) | |
1577 | goto out; | |
1578 | ||
1579 | ipxs->dest_addr.net = addr->sipx_network; | |
1580 | ipxs->dest_addr.sock = addr->sipx_port; | |
1581 | memcpy(ipxs->dest_addr.node, addr->sipx_node, IPX_NODE_LEN); | |
1582 | ipxs->type = addr->sipx_type; | |
1583 | ||
1584 | if (sock->type == SOCK_DGRAM) { | |
1585 | sock->state = SS_CONNECTED; | |
1586 | sk->sk_state = TCP_ESTABLISHED; | |
1587 | } | |
1588 | ||
1589 | if (rt) | |
1590 | ipxrtr_put(rt); | |
1591 | rc = 0; | |
1592 | out: | |
1593 | return rc; | |
1594 | } | |
1595 | ||
1596 | ||
1597 | static int ipx_getname(struct socket *sock, struct sockaddr *uaddr, | |
1598 | int *uaddr_len, int peer) | |
1599 | { | |
1600 | struct ipx_address *addr; | |
1601 | struct sockaddr_ipx sipx; | |
1602 | struct sock *sk = sock->sk; | |
1603 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1604 | int rc; | |
1605 | ||
1606 | *uaddr_len = sizeof(struct sockaddr_ipx); | |
1607 | ||
1608 | if (peer) { | |
1609 | rc = -ENOTCONN; | |
1610 | if (sk->sk_state != TCP_ESTABLISHED) | |
1611 | goto out; | |
1612 | ||
1613 | addr = &ipxs->dest_addr; | |
1614 | sipx.sipx_network = addr->net; | |
1615 | sipx.sipx_port = addr->sock; | |
1616 | memcpy(sipx.sipx_node, addr->node, IPX_NODE_LEN); | |
1617 | } else { | |
1618 | if (ipxs->intrfc) { | |
1619 | sipx.sipx_network = ipxs->intrfc->if_netnum; | |
1620 | #ifdef CONFIG_IPX_INTERN | |
1621 | memcpy(sipx.sipx_node, ipxs->node, IPX_NODE_LEN); | |
1622 | #else | |
1623 | memcpy(sipx.sipx_node, ipxs->intrfc->if_node, | |
1624 | IPX_NODE_LEN); | |
1625 | #endif /* CONFIG_IPX_INTERN */ | |
1626 | ||
1627 | } else { | |
1628 | sipx.sipx_network = 0; | |
1629 | memset(sipx.sipx_node, '\0', IPX_NODE_LEN); | |
1630 | } | |
1631 | ||
1632 | sipx.sipx_port = ipxs->port; | |
1633 | } | |
1634 | ||
1635 | sipx.sipx_family = AF_IPX; | |
1636 | sipx.sipx_type = ipxs->type; | |
1637 | sipx.sipx_zero = 0; | |
1638 | memcpy(uaddr, &sipx, sizeof(sipx)); | |
1639 | ||
1640 | rc = 0; | |
1641 | out: | |
1642 | return rc; | |
1643 | } | |
1644 | ||
f2ccd8fa | 1645 | static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
1da177e4 LT |
1646 | { |
1647 | /* NULL here for pt means the packet was looped back */ | |
1648 | struct ipx_interface *intrfc; | |
1649 | struct ipxhdr *ipx; | |
1650 | u16 ipx_pktsize; | |
1651 | int rc = 0; | |
981c0ff6 | 1652 | |
e730c155 EB |
1653 | if (dev->nd_net != &init_net) |
1654 | goto drop; | |
1655 | ||
981c0ff6 YH |
1656 | /* Not ours */ |
1657 | if (skb->pkt_type == PACKET_OTHERHOST) | |
1658 | goto drop; | |
1da177e4 LT |
1659 | |
1660 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) | |
1661 | goto out; | |
1662 | ||
7b1ba8de SH |
1663 | if (!pskb_may_pull(skb, sizeof(struct ipxhdr))) |
1664 | goto drop; | |
1665 | ||
fff64257 | 1666 | ipx_pktsize = ntohs(ipx_hdr(skb)->ipx_pktsize); |
981c0ff6 | 1667 | |
1da177e4 | 1668 | /* Too small or invalid header? */ |
8b5cc5ef SH |
1669 | if (ipx_pktsize < sizeof(struct ipxhdr) || |
1670 | !pskb_may_pull(skb, ipx_pktsize)) | |
1da177e4 | 1671 | goto drop; |
981c0ff6 | 1672 | |
7b1ba8de | 1673 | ipx = ipx_hdr(skb); |
1da177e4 LT |
1674 | if (ipx->ipx_checksum != IPX_NO_CHECKSUM && |
1675 | ipx->ipx_checksum != ipx_cksum(ipx, ipx_pktsize)) | |
1676 | goto drop; | |
1677 | ||
1678 | IPX_SKB_CB(skb)->ipx_tctrl = ipx->ipx_tctrl; | |
1679 | IPX_SKB_CB(skb)->ipx_dest_net = ipx->ipx_dest.net; | |
1680 | IPX_SKB_CB(skb)->ipx_source_net = ipx->ipx_source.net; | |
1681 | ||
1682 | /* Determine what local ipx endpoint this is */ | |
1683 | intrfc = ipxitf_find_using_phys(dev, pt->type); | |
1684 | if (!intrfc) { | |
1685 | if (ipxcfg_auto_create_interfaces && | |
4833ed09 | 1686 | IPX_SKB_CB(skb)->ipx_dest_net) { |
1da177e4 LT |
1687 | intrfc = ipxitf_auto_create(dev, pt->type); |
1688 | if (intrfc) | |
1689 | ipxitf_hold(intrfc); | |
1690 | } | |
1691 | ||
1692 | if (!intrfc) /* Not one of ours */ | |
1693 | /* or invalid packet for auto creation */ | |
1694 | goto drop; | |
1695 | } | |
1696 | ||
1697 | rc = ipxitf_rcv(intrfc, skb); | |
1698 | ipxitf_put(intrfc); | |
1699 | goto out; | |
1700 | drop: | |
1701 | kfree_skb(skb); | |
1702 | out: | |
1703 | return rc; | |
1704 | } | |
1705 | ||
1706 | static int ipx_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1707 | struct msghdr *msg, size_t len) | |
1708 | { | |
1709 | struct sock *sk = sock->sk; | |
1710 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1711 | struct sockaddr_ipx *usipx = (struct sockaddr_ipx *)msg->msg_name; | |
1712 | struct sockaddr_ipx local_sipx; | |
1713 | int rc = -EINVAL; | |
1714 | int flags = msg->msg_flags; | |
1715 | ||
1716 | /* Socket gets bound below anyway */ | |
1717 | /* if (sk->sk_zapped) | |
1718 | return -EIO; */ /* Socket not bound */ | |
1719 | if (flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) | |
1720 | goto out; | |
1721 | ||
1722 | /* Max possible packet size limited by 16 bit pktsize in header */ | |
1723 | if (len >= 65535 - sizeof(struct ipxhdr)) | |
1724 | goto out; | |
1725 | ||
1726 | if (usipx) { | |
1727 | if (!ipxs->port) { | |
1728 | struct sockaddr_ipx uaddr; | |
1729 | ||
1730 | uaddr.sipx_port = 0; | |
1731 | uaddr.sipx_network = 0; | |
1732 | #ifdef CONFIG_IPX_INTERN | |
1733 | rc = -ENETDOWN; | |
1734 | if (!ipxs->intrfc) | |
1735 | goto out; /* Someone zonked the iface */ | |
1736 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, | |
1737 | IPX_NODE_LEN); | |
1738 | #endif | |
1739 | rc = ipx_bind(sock, (struct sockaddr *)&uaddr, | |
1740 | sizeof(struct sockaddr_ipx)); | |
1741 | if (rc) | |
1742 | goto out; | |
1743 | } | |
1744 | ||
1745 | rc = -EINVAL; | |
1746 | if (msg->msg_namelen < sizeof(*usipx) || | |
1747 | usipx->sipx_family != AF_IPX) | |
1748 | goto out; | |
1749 | } else { | |
1750 | rc = -ENOTCONN; | |
1751 | if (sk->sk_state != TCP_ESTABLISHED) | |
1752 | goto out; | |
1753 | ||
1754 | usipx = &local_sipx; | |
1755 | usipx->sipx_family = AF_IPX; | |
1756 | usipx->sipx_type = ipxs->type; | |
1757 | usipx->sipx_port = ipxs->dest_addr.sock; | |
1758 | usipx->sipx_network = ipxs->dest_addr.net; | |
1759 | memcpy(usipx->sipx_node, ipxs->dest_addr.node, IPX_NODE_LEN); | |
1760 | } | |
1761 | ||
1762 | rc = ipxrtr_route_packet(sk, usipx, msg->msg_iov, len, | |
1763 | flags & MSG_DONTWAIT); | |
1764 | if (rc >= 0) | |
1765 | rc = len; | |
1766 | out: | |
1767 | return rc; | |
1768 | } | |
1769 | ||
1770 | ||
1771 | static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1772 | struct msghdr *msg, size_t size, int flags) | |
1773 | { | |
1774 | struct sock *sk = sock->sk; | |
1775 | struct ipx_sock *ipxs = ipx_sk(sk); | |
1776 | struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)msg->msg_name; | |
1777 | struct ipxhdr *ipx = NULL; | |
1778 | struct sk_buff *skb; | |
1779 | int copied, rc; | |
1780 | ||
1781 | /* put the autobinding in */ | |
1782 | if (!ipxs->port) { | |
1783 | struct sockaddr_ipx uaddr; | |
1784 | ||
1785 | uaddr.sipx_port = 0; | |
1786 | uaddr.sipx_network = 0; | |
1787 | ||
1788 | #ifdef CONFIG_IPX_INTERN | |
1789 | rc = -ENETDOWN; | |
1790 | if (!ipxs->intrfc) | |
1791 | goto out; /* Someone zonked the iface */ | |
1792 | memcpy(uaddr.sipx_node, ipxs->intrfc->if_node, IPX_NODE_LEN); | |
1793 | #endif /* CONFIG_IPX_INTERN */ | |
1794 | ||
1795 | rc = ipx_bind(sock, (struct sockaddr *)&uaddr, | |
1796 | sizeof(struct sockaddr_ipx)); | |
1797 | if (rc) | |
1798 | goto out; | |
1799 | } | |
981c0ff6 | 1800 | |
1da177e4 LT |
1801 | rc = -ENOTCONN; |
1802 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1803 | goto out; | |
1804 | ||
1805 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1806 | flags & MSG_DONTWAIT, &rc); | |
1807 | if (!skb) | |
1808 | goto out; | |
1809 | ||
1810 | ipx = ipx_hdr(skb); | |
1811 | copied = ntohs(ipx->ipx_pktsize) - sizeof(struct ipxhdr); | |
1812 | if (copied > size) { | |
1813 | copied = size; | |
1814 | msg->msg_flags |= MSG_TRUNC; | |
1815 | } | |
1816 | ||
1817 | rc = skb_copy_datagram_iovec(skb, sizeof(struct ipxhdr), msg->msg_iov, | |
1818 | copied); | |
1819 | if (rc) | |
1820 | goto out_free; | |
b7aa0bf7 ED |
1821 | if (skb->tstamp.tv64) |
1822 | sk->sk_stamp = skb->tstamp; | |
1da177e4 LT |
1823 | |
1824 | msg->msg_namelen = sizeof(*sipx); | |
1825 | ||
1826 | if (sipx) { | |
1827 | sipx->sipx_family = AF_IPX; | |
1828 | sipx->sipx_port = ipx->ipx_source.sock; | |
1829 | memcpy(sipx->sipx_node, ipx->ipx_source.node, IPX_NODE_LEN); | |
1830 | sipx->sipx_network = IPX_SKB_CB(skb)->ipx_source_net; | |
1831 | sipx->sipx_type = ipx->ipx_type; | |
1832 | sipx->sipx_zero = 0; | |
1833 | } | |
1834 | rc = copied; | |
1835 | ||
1836 | out_free: | |
1837 | skb_free_datagram(sk, skb); | |
1838 | out: | |
1839 | return rc; | |
1840 | } | |
1841 | ||
1842 | ||
1843 | static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1844 | { | |
1845 | int rc = 0; | |
1846 | long amount = 0; | |
1847 | struct sock *sk = sock->sk; | |
1848 | void __user *argp = (void __user *)arg; | |
1849 | ||
1850 | switch (cmd) { | |
1851 | case TIOCOUTQ: | |
1852 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1853 | if (amount < 0) | |
1854 | amount = 0; | |
1855 | rc = put_user(amount, (int __user *)argp); | |
1856 | break; | |
1857 | case TIOCINQ: { | |
1858 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); | |
1859 | /* These two are safe on a single CPU system as only | |
1860 | * user tasks fiddle here */ | |
1861 | if (skb) | |
1862 | amount = skb->len - sizeof(struct ipxhdr); | |
1863 | rc = put_user(amount, (int __user *)argp); | |
1864 | break; | |
1865 | } | |
1866 | case SIOCADDRT: | |
1867 | case SIOCDELRT: | |
1868 | rc = -EPERM; | |
1869 | if (capable(CAP_NET_ADMIN)) | |
1870 | rc = ipxrtr_ioctl(cmd, argp); | |
1871 | break; | |
1872 | case SIOCSIFADDR: | |
1873 | case SIOCAIPXITFCRT: | |
1874 | case SIOCAIPXPRISLT: | |
1875 | rc = -EPERM; | |
1876 | if (!capable(CAP_NET_ADMIN)) | |
1877 | break; | |
1878 | case SIOCGIFADDR: | |
1879 | rc = ipxitf_ioctl(cmd, argp); | |
1880 | break; | |
1881 | case SIOCIPXCFGDATA: | |
1882 | rc = ipxcfg_get_config_data(argp); | |
1883 | break; | |
1884 | case SIOCIPXNCPCONN: | |
1885 | /* | |
1886 | * This socket wants to take care of the NCP connection | |
1887 | * handed to us in arg. | |
1888 | */ | |
981c0ff6 YH |
1889 | rc = -EPERM; |
1890 | if (!capable(CAP_NET_ADMIN)) | |
1da177e4 LT |
1891 | break; |
1892 | rc = get_user(ipx_sk(sk)->ipx_ncp_conn, | |
1893 | (const unsigned short __user *)argp); | |
1894 | break; | |
1895 | case SIOCGSTAMP: | |
1896 | rc = -EINVAL; | |
981c0ff6 | 1897 | if (sk) |
1da177e4 LT |
1898 | rc = sock_get_timestamp(sk, argp); |
1899 | break; | |
1900 | case SIOCGIFDSTADDR: | |
1901 | case SIOCSIFDSTADDR: | |
1902 | case SIOCGIFBRDADDR: | |
1903 | case SIOCSIFBRDADDR: | |
1904 | case SIOCGIFNETMASK: | |
1905 | case SIOCSIFNETMASK: | |
1906 | rc = -EINVAL; | |
1907 | break; | |
1908 | default: | |
b5e5fa5e | 1909 | rc = -ENOIOCTLCMD; |
1da177e4 LT |
1910 | break; |
1911 | } | |
1912 | ||
1913 | return rc; | |
1914 | } | |
1915 | ||
f6c90b71 PV |
1916 | |
1917 | #ifdef CONFIG_COMPAT | |
1918 | static int ipx_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1919 | { | |
1920 | /* | |
1921 | * These 4 commands use same structure on 32bit and 64bit. Rest of IPX | |
1922 | * commands is handled by generic ioctl code. As these commands are | |
1923 | * SIOCPROTOPRIVATE..SIOCPROTOPRIVATE+3, they cannot be handled by generic | |
1924 | * code. | |
1925 | */ | |
1926 | switch (cmd) { | |
1927 | case SIOCAIPXITFCRT: | |
1928 | case SIOCAIPXPRISLT: | |
1929 | case SIOCIPXCFGDATA: | |
1930 | case SIOCIPXNCPCONN: | |
1931 | return ipx_ioctl(sock, cmd, arg); | |
1932 | default: | |
1933 | return -ENOIOCTLCMD; | |
1934 | } | |
1935 | } | |
1936 | #endif | |
1937 | ||
1938 | ||
1da177e4 LT |
1939 | /* |
1940 | * Socket family declarations | |
1941 | */ | |
1942 | ||
1943 | static struct net_proto_family ipx_family_ops = { | |
1944 | .family = PF_IPX, | |
1945 | .create = ipx_create, | |
1946 | .owner = THIS_MODULE, | |
1947 | }; | |
1948 | ||
90ddc4f0 | 1949 | static const struct proto_ops SOCKOPS_WRAPPED(ipx_dgram_ops) = { |
1da177e4 LT |
1950 | .family = PF_IPX, |
1951 | .owner = THIS_MODULE, | |
1952 | .release = ipx_release, | |
1953 | .bind = ipx_bind, | |
1954 | .connect = ipx_connect, | |
1955 | .socketpair = sock_no_socketpair, | |
1956 | .accept = sock_no_accept, | |
1957 | .getname = ipx_getname, | |
1958 | .poll = datagram_poll, | |
1959 | .ioctl = ipx_ioctl, | |
f6c90b71 PV |
1960 | #ifdef CONFIG_COMPAT |
1961 | .compat_ioctl = ipx_compat_ioctl, | |
1962 | #endif | |
1da177e4 LT |
1963 | .listen = sock_no_listen, |
1964 | .shutdown = sock_no_shutdown, /* FIXME: support shutdown */ | |
1965 | .setsockopt = ipx_setsockopt, | |
1966 | .getsockopt = ipx_getsockopt, | |
1967 | .sendmsg = ipx_sendmsg, | |
1968 | .recvmsg = ipx_recvmsg, | |
1969 | .mmap = sock_no_mmap, | |
1970 | .sendpage = sock_no_sendpage, | |
1971 | }; | |
1972 | ||
1da177e4 LT |
1973 | SOCKOPS_WRAP(ipx_dgram, PF_IPX); |
1974 | ||
1975 | static struct packet_type ipx_8023_packet_type = { | |
1976 | .type = __constant_htons(ETH_P_802_3), | |
1977 | .func = ipx_rcv, | |
1978 | }; | |
1979 | ||
1980 | static struct packet_type ipx_dix_packet_type = { | |
1981 | .type = __constant_htons(ETH_P_IPX), | |
1982 | .func = ipx_rcv, | |
1983 | }; | |
1984 | ||
1985 | static struct notifier_block ipx_dev_notifier = { | |
1986 | .notifier_call = ipxitf_device_event, | |
1987 | }; | |
1988 | ||
1989 | extern struct datalink_proto *make_EII_client(void); | |
1da177e4 | 1990 | extern void destroy_EII_client(struct datalink_proto *); |
1da177e4 LT |
1991 | |
1992 | static unsigned char ipx_8022_type = 0xE0; | |
1993 | static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 }; | |
1994 | static char ipx_EII_err_msg[] __initdata = | |
1995 | KERN_CRIT "IPX: Unable to register with Ethernet II\n"; | |
1996 | static char ipx_8023_err_msg[] __initdata = | |
1997 | KERN_CRIT "IPX: Unable to register with 802.3\n"; | |
1998 | static char ipx_llc_err_msg[] __initdata = | |
1999 | KERN_CRIT "IPX: Unable to register with 802.2\n"; | |
2000 | static char ipx_snap_err_msg[] __initdata = | |
2001 | KERN_CRIT "IPX: Unable to register with SNAP\n"; | |
2002 | ||
2003 | static int __init ipx_init(void) | |
2004 | { | |
2005 | int rc = proto_register(&ipx_proto, 1); | |
2006 | ||
2007 | if (rc != 0) | |
2008 | goto out; | |
2009 | ||
2010 | sock_register(&ipx_family_ops); | |
2011 | ||
2012 | pEII_datalink = make_EII_client(); | |
2013 | if (pEII_datalink) | |
2014 | dev_add_pack(&ipx_dix_packet_type); | |
2015 | else | |
2016 | printk(ipx_EII_err_msg); | |
2017 | ||
2018 | p8023_datalink = make_8023_client(); | |
2019 | if (p8023_datalink) | |
2020 | dev_add_pack(&ipx_8023_packet_type); | |
2021 | else | |
2022 | printk(ipx_8023_err_msg); | |
2023 | ||
2024 | p8022_datalink = register_8022_client(ipx_8022_type, ipx_rcv); | |
2025 | if (!p8022_datalink) | |
2026 | printk(ipx_llc_err_msg); | |
2027 | ||
2028 | pSNAP_datalink = register_snap_client(ipx_snap_id, ipx_rcv); | |
2029 | if (!pSNAP_datalink) | |
2030 | printk(ipx_snap_err_msg); | |
2031 | ||
2032 | register_netdevice_notifier(&ipx_dev_notifier); | |
2033 | ipx_register_sysctl(); | |
2034 | ipx_proc_init(); | |
2035 | out: | |
2036 | return rc; | |
2037 | } | |
2038 | ||
2039 | static void __exit ipx_proto_finito(void) | |
2040 | { | |
2041 | ipx_proc_exit(); | |
2042 | ipx_unregister_sysctl(); | |
2043 | ||
2044 | unregister_netdevice_notifier(&ipx_dev_notifier); | |
2045 | ||
2046 | ipxitf_cleanup(); | |
2047 | ||
1539b98b JB |
2048 | if (pSNAP_datalink) { |
2049 | unregister_snap_client(pSNAP_datalink); | |
2050 | pSNAP_datalink = NULL; | |
2051 | } | |
1da177e4 | 2052 | |
1539b98b JB |
2053 | if (p8022_datalink) { |
2054 | unregister_8022_client(p8022_datalink); | |
2055 | p8022_datalink = NULL; | |
2056 | } | |
1da177e4 LT |
2057 | |
2058 | dev_remove_pack(&ipx_8023_packet_type); | |
1539b98b JB |
2059 | if (p8023_datalink) { |
2060 | destroy_8023_client(p8023_datalink); | |
2061 | p8023_datalink = NULL; | |
2062 | } | |
1da177e4 LT |
2063 | |
2064 | dev_remove_pack(&ipx_dix_packet_type); | |
1539b98b JB |
2065 | if (pEII_datalink) { |
2066 | destroy_EII_client(pEII_datalink); | |
2067 | pEII_datalink = NULL; | |
2068 | } | |
1da177e4 LT |
2069 | |
2070 | proto_unregister(&ipx_proto); | |
2071 | sock_unregister(ipx_family_ops.family); | |
2072 | } | |
2073 | ||
2074 | module_init(ipx_init); | |
2075 | module_exit(ipx_proto_finito); | |
2076 | MODULE_LICENSE("GPL"); | |
2077 | MODULE_ALIAS_NETPROTO(PF_IPX); |