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Commit | Line | Data |
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1da177e4 LT |
1 | |
2 | /* | |
3 | * DECnet An implementation of the DECnet protocol suite for the LINUX | |
4 | * operating system. DECnet is implemented using the BSD Socket | |
5 | * interface as the means of communication with the user level. | |
6 | * | |
7 | * DECnet Socket Layer Interface | |
8 | * | |
9 | * Authors: Eduardo Marcelo Serrat <emserrat@geocities.com> | |
10 | * Patrick Caulfield <patrick@pandh.demon.co.uk> | |
11 | * | |
12 | * Changes: | |
13 | * Steve Whitehouse: Copied from Eduardo Serrat and Patrick Caulfield's | |
14 | * version of the code. Original copyright preserved | |
15 | * below. | |
16 | * Steve Whitehouse: Some bug fixes, cleaning up some code to make it | |
17 | * compatible with my routing layer. | |
18 | * Steve Whitehouse: Merging changes from Eduardo Serrat and Patrick | |
19 | * Caulfield. | |
20 | * Steve Whitehouse: Further bug fixes, checking module code still works | |
21 | * with new routing layer. | |
22 | * Steve Whitehouse: Additional set/get_sockopt() calls. | |
23 | * Steve Whitehouse: Fixed TIOCINQ ioctl to be same as Eduardo's new | |
24 | * code. | |
25 | * Steve Whitehouse: recvmsg() changed to try and behave in a POSIX like | |
26 | * way. Didn't manage it entirely, but its better. | |
27 | * Steve Whitehouse: ditto for sendmsg(). | |
28 | * Steve Whitehouse: A selection of bug fixes to various things. | |
29 | * Steve Whitehouse: Added TIOCOUTQ ioctl. | |
30 | * Steve Whitehouse: Fixes to username2sockaddr & sockaddr2username. | |
31 | * Steve Whitehouse: Fixes to connect() error returns. | |
32 | * Patrick Caulfield: Fixes to delayed acceptance logic. | |
33 | * David S. Miller: New socket locking | |
34 | * Steve Whitehouse: Socket list hashing/locking | |
35 | * Arnaldo C. Melo: use capable, not suser | |
36 | * Steve Whitehouse: Removed unused code. Fix to use sk->allocation | |
37 | * when required. | |
38 | * Patrick Caulfield: /proc/net/decnet now has object name/number | |
39 | * Steve Whitehouse: Fixed local port allocation, hashed sk list | |
40 | * Matthew Wilcox: Fixes for dn_ioctl() | |
41 | * Steve Whitehouse: New connect/accept logic to allow timeouts and | |
42 | * prepare for sendpage etc. | |
43 | */ | |
44 | ||
45 | ||
46 | /****************************************************************************** | |
47 | (c) 1995-1998 E.M. Serrat emserrat@geocities.com | |
48 | ||
49 | This program is free software; you can redistribute it and/or modify | |
50 | it under the terms of the GNU General Public License as published by | |
51 | the Free Software Foundation; either version 2 of the License, or | |
52 | any later version. | |
53 | ||
54 | This program is distributed in the hope that it will be useful, | |
55 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
56 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
57 | GNU General Public License for more details. | |
58 | ||
59 | HISTORY: | |
60 | ||
61 | Version Kernel Date Author/Comments | |
62 | ------- ------ ---- --------------- | |
63 | Version 0.0.1 2.0.30 01-dic-97 Eduardo Marcelo Serrat | |
64 | (emserrat@geocities.com) | |
65 | ||
66 | First Development of DECnet Socket La- | |
67 | yer for Linux. Only supports outgoing | |
68 | connections. | |
69 | ||
70 | Version 0.0.2 2.1.105 20-jun-98 Patrick J. Caulfield | |
71 | (patrick@pandh.demon.co.uk) | |
72 | ||
73 | Port to new kernel development version. | |
74 | ||
75 | Version 0.0.3 2.1.106 25-jun-98 Eduardo Marcelo Serrat | |
76 | (emserrat@geocities.com) | |
77 | _ | |
78 | Added support for incoming connections | |
79 | so we can start developing server apps | |
80 | on Linux. | |
81 | - | |
82 | Module Support | |
83 | Version 0.0.4 2.1.109 21-jul-98 Eduardo Marcelo Serrat | |
84 | (emserrat@geocities.com) | |
85 | _ | |
86 | Added support for X11R6.4. Now we can | |
87 | use DECnet transport for X on Linux!!! | |
88 | - | |
89 | Version 0.0.5 2.1.110 01-aug-98 Eduardo Marcelo Serrat | |
90 | (emserrat@geocities.com) | |
91 | Removed bugs on flow control | |
92 | Removed bugs on incoming accessdata | |
93 | order | |
94 | - | |
95 | Version 0.0.6 2.1.110 07-aug-98 Eduardo Marcelo Serrat | |
96 | dn_recvmsg fixes | |
97 | ||
98 | Patrick J. Caulfield | |
99 | dn_bind fixes | |
100 | *******************************************************************************/ | |
101 | ||
102 | #include <linux/config.h> | |
103 | #include <linux/module.h> | |
104 | #include <linux/errno.h> | |
105 | #include <linux/types.h> | |
106 | #include <linux/slab.h> | |
107 | #include <linux/socket.h> | |
108 | #include <linux/in.h> | |
109 | #include <linux/kernel.h> | |
110 | #include <linux/sched.h> | |
111 | #include <linux/timer.h> | |
112 | #include <linux/string.h> | |
113 | #include <linux/sockios.h> | |
114 | #include <linux/net.h> | |
115 | #include <linux/netdevice.h> | |
116 | #include <linux/inet.h> | |
117 | #include <linux/route.h> | |
118 | #include <linux/netfilter.h> | |
119 | #include <linux/seq_file.h> | |
120 | #include <net/sock.h> | |
c752f073 | 121 | #include <net/tcp_states.h> |
1da177e4 LT |
122 | #include <net/flow.h> |
123 | #include <asm/system.h> | |
124 | #include <asm/ioctls.h> | |
125 | #include <linux/mm.h> | |
126 | #include <linux/interrupt.h> | |
127 | #include <linux/proc_fs.h> | |
128 | #include <linux/stat.h> | |
129 | #include <linux/init.h> | |
130 | #include <linux/poll.h> | |
131 | #include <net/neighbour.h> | |
132 | #include <net/dst.h> | |
133 | #include <net/dn.h> | |
134 | #include <net/dn_nsp.h> | |
135 | #include <net/dn_dev.h> | |
136 | #include <net/dn_route.h> | |
137 | #include <net/dn_fib.h> | |
138 | #include <net/dn_neigh.h> | |
139 | ||
140 | struct dn_sock { | |
141 | struct sock sk; | |
142 | struct dn_scp scp; | |
143 | }; | |
144 | ||
145 | static void dn_keepalive(struct sock *sk); | |
146 | ||
147 | #define DN_SK_HASH_SHIFT 8 | |
148 | #define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT) | |
149 | #define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1) | |
150 | ||
151 | ||
152 | static struct proto_ops dn_proto_ops; | |
153 | static DEFINE_RWLOCK(dn_hash_lock); | |
154 | static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE]; | |
155 | static struct hlist_head dn_wild_sk; | |
156 | ||
157 | static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen, int flags); | |
158 | static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags); | |
159 | ||
160 | static struct hlist_head *dn_find_list(struct sock *sk) | |
161 | { | |
162 | struct dn_scp *scp = DN_SK(sk); | |
163 | ||
164 | if (scp->addr.sdn_flags & SDF_WILD) | |
165 | return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL; | |
166 | ||
167 | return &dn_sk_hash[scp->addrloc & DN_SK_HASH_MASK]; | |
168 | } | |
169 | ||
170 | /* | |
171 | * Valid ports are those greater than zero and not already in use. | |
172 | */ | |
173 | static int check_port(unsigned short port) | |
174 | { | |
175 | struct sock *sk; | |
176 | struct hlist_node *node; | |
177 | ||
178 | if (port == 0) | |
179 | return -1; | |
180 | ||
181 | sk_for_each(sk, node, &dn_sk_hash[port & DN_SK_HASH_MASK]) { | |
182 | struct dn_scp *scp = DN_SK(sk); | |
183 | if (scp->addrloc == port) | |
184 | return -1; | |
185 | } | |
186 | return 0; | |
187 | } | |
188 | ||
189 | static unsigned short port_alloc(struct sock *sk) | |
190 | { | |
191 | struct dn_scp *scp = DN_SK(sk); | |
192 | static unsigned short port = 0x2000; | |
193 | unsigned short i_port = port; | |
194 | ||
195 | while(check_port(++port) != 0) { | |
196 | if (port == i_port) | |
197 | return 0; | |
198 | } | |
199 | ||
200 | scp->addrloc = port; | |
201 | ||
202 | return 1; | |
203 | } | |
204 | ||
205 | /* | |
206 | * Since this is only ever called from user | |
207 | * level, we don't need a write_lock() version | |
208 | * of this. | |
209 | */ | |
210 | static int dn_hash_sock(struct sock *sk) | |
211 | { | |
212 | struct dn_scp *scp = DN_SK(sk); | |
213 | struct hlist_head *list; | |
214 | int rv = -EUSERS; | |
215 | ||
216 | BUG_ON(sk_hashed(sk)); | |
217 | ||
218 | write_lock_bh(&dn_hash_lock); | |
219 | ||
220 | if (!scp->addrloc && !port_alloc(sk)) | |
221 | goto out; | |
222 | ||
223 | rv = -EADDRINUSE; | |
224 | if ((list = dn_find_list(sk)) == NULL) | |
225 | goto out; | |
226 | ||
227 | sk_add_node(sk, list); | |
228 | rv = 0; | |
229 | out: | |
230 | write_unlock_bh(&dn_hash_lock); | |
231 | return rv; | |
232 | } | |
233 | ||
234 | static void dn_unhash_sock(struct sock *sk) | |
235 | { | |
236 | write_lock(&dn_hash_lock); | |
237 | sk_del_node_init(sk); | |
238 | write_unlock(&dn_hash_lock); | |
239 | } | |
240 | ||
241 | static void dn_unhash_sock_bh(struct sock *sk) | |
242 | { | |
243 | write_lock_bh(&dn_hash_lock); | |
244 | sk_del_node_init(sk); | |
245 | write_unlock_bh(&dn_hash_lock); | |
246 | } | |
247 | ||
248 | static struct hlist_head *listen_hash(struct sockaddr_dn *addr) | |
249 | { | |
250 | int i; | |
251 | unsigned hash = addr->sdn_objnum; | |
252 | ||
253 | if (hash == 0) { | |
254 | hash = addr->sdn_objnamel; | |
255 | for(i = 0; i < dn_ntohs(addr->sdn_objnamel); i++) { | |
256 | hash ^= addr->sdn_objname[i]; | |
257 | hash ^= (hash << 3); | |
258 | } | |
259 | } | |
260 | ||
261 | return &dn_sk_hash[hash & DN_SK_HASH_MASK]; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Called to transform a socket from bound (i.e. with a local address) | |
266 | * into a listening socket (doesn't need a local port number) and rehashes | |
267 | * based upon the object name/number. | |
268 | */ | |
269 | static void dn_rehash_sock(struct sock *sk) | |
270 | { | |
271 | struct hlist_head *list; | |
272 | struct dn_scp *scp = DN_SK(sk); | |
273 | ||
274 | if (scp->addr.sdn_flags & SDF_WILD) | |
275 | return; | |
276 | ||
277 | write_lock_bh(&dn_hash_lock); | |
278 | sk_del_node_init(sk); | |
279 | DN_SK(sk)->addrloc = 0; | |
280 | list = listen_hash(&DN_SK(sk)->addr); | |
281 | sk_add_node(sk, list); | |
282 | write_unlock_bh(&dn_hash_lock); | |
283 | } | |
284 | ||
285 | int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type) | |
286 | { | |
287 | int len = 2; | |
288 | ||
289 | *buf++ = type; | |
290 | ||
291 | switch(type) { | |
292 | case 0: | |
293 | *buf++ = sdn->sdn_objnum; | |
294 | break; | |
295 | case 1: | |
296 | *buf++ = 0; | |
297 | *buf++ = dn_ntohs(sdn->sdn_objnamel); | |
298 | memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel)); | |
299 | len = 3 + dn_ntohs(sdn->sdn_objnamel); | |
300 | break; | |
301 | case 2: | |
302 | memset(buf, 0, 5); | |
303 | buf += 5; | |
304 | *buf++ = dn_ntohs(sdn->sdn_objnamel); | |
305 | memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel)); | |
306 | len = 7 + dn_ntohs(sdn->sdn_objnamel); | |
307 | break; | |
308 | } | |
309 | ||
310 | return len; | |
311 | } | |
312 | ||
313 | /* | |
314 | * On reception of usernames, we handle types 1 and 0 for destination | |
315 | * addresses only. Types 2 and 4 are used for source addresses, but the | |
316 | * UIC, GIC are ignored and they are both treated the same way. Type 3 | |
317 | * is never used as I've no idea what its purpose might be or what its | |
318 | * format is. | |
319 | */ | |
320 | int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt) | |
321 | { | |
322 | unsigned char type; | |
323 | int size = len; | |
324 | int namel = 12; | |
325 | ||
326 | sdn->sdn_objnum = 0; | |
327 | sdn->sdn_objnamel = dn_htons(0); | |
328 | memset(sdn->sdn_objname, 0, DN_MAXOBJL); | |
329 | ||
330 | if (len < 2) | |
331 | return -1; | |
332 | ||
333 | len -= 2; | |
334 | *fmt = *data++; | |
335 | type = *data++; | |
336 | ||
337 | switch(*fmt) { | |
338 | case 0: | |
339 | sdn->sdn_objnum = type; | |
340 | return 2; | |
341 | case 1: | |
342 | namel = 16; | |
343 | break; | |
344 | case 2: | |
345 | len -= 4; | |
346 | data += 4; | |
347 | break; | |
348 | case 4: | |
349 | len -= 8; | |
350 | data += 8; | |
351 | break; | |
352 | default: | |
353 | return -1; | |
354 | } | |
355 | ||
356 | len -= 1; | |
357 | ||
358 | if (len < 0) | |
359 | return -1; | |
360 | ||
361 | sdn->sdn_objnamel = dn_htons(*data++); | |
362 | len -= dn_ntohs(sdn->sdn_objnamel); | |
363 | ||
364 | if ((len < 0) || (dn_ntohs(sdn->sdn_objnamel) > namel)) | |
365 | return -1; | |
366 | ||
367 | memcpy(sdn->sdn_objname, data, dn_ntohs(sdn->sdn_objnamel)); | |
368 | ||
369 | return size - len; | |
370 | } | |
371 | ||
372 | struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr) | |
373 | { | |
374 | struct hlist_head *list = listen_hash(addr); | |
375 | struct hlist_node *node; | |
376 | struct sock *sk; | |
377 | ||
378 | read_lock(&dn_hash_lock); | |
379 | sk_for_each(sk, node, list) { | |
380 | struct dn_scp *scp = DN_SK(sk); | |
381 | if (sk->sk_state != TCP_LISTEN) | |
382 | continue; | |
383 | if (scp->addr.sdn_objnum) { | |
384 | if (scp->addr.sdn_objnum != addr->sdn_objnum) | |
385 | continue; | |
386 | } else { | |
387 | if (addr->sdn_objnum) | |
388 | continue; | |
389 | if (scp->addr.sdn_objnamel != addr->sdn_objnamel) | |
390 | continue; | |
391 | if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, dn_ntohs(addr->sdn_objnamel)) != 0) | |
392 | continue; | |
393 | } | |
394 | sock_hold(sk); | |
395 | read_unlock(&dn_hash_lock); | |
396 | return sk; | |
397 | } | |
398 | ||
399 | sk = sk_head(&dn_wild_sk); | |
400 | if (sk) { | |
401 | if (sk->sk_state == TCP_LISTEN) | |
402 | sock_hold(sk); | |
403 | else | |
404 | sk = NULL; | |
405 | } | |
406 | ||
407 | read_unlock(&dn_hash_lock); | |
408 | return sk; | |
409 | } | |
410 | ||
411 | struct sock *dn_find_by_skb(struct sk_buff *skb) | |
412 | { | |
413 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
414 | struct sock *sk; | |
415 | struct hlist_node *node; | |
416 | struct dn_scp *scp; | |
417 | ||
418 | read_lock(&dn_hash_lock); | |
419 | sk_for_each(sk, node, &dn_sk_hash[cb->dst_port & DN_SK_HASH_MASK]) { | |
420 | scp = DN_SK(sk); | |
421 | if (cb->src != dn_saddr2dn(&scp->peer)) | |
422 | continue; | |
423 | if (cb->dst_port != scp->addrloc) | |
424 | continue; | |
425 | if (scp->addrrem && (cb->src_port != scp->addrrem)) | |
426 | continue; | |
427 | sock_hold(sk); | |
428 | goto found; | |
429 | } | |
430 | sk = NULL; | |
431 | found: | |
432 | read_unlock(&dn_hash_lock); | |
433 | return sk; | |
434 | } | |
435 | ||
436 | ||
437 | ||
438 | static void dn_destruct(struct sock *sk) | |
439 | { | |
440 | struct dn_scp *scp = DN_SK(sk); | |
441 | ||
442 | skb_queue_purge(&scp->data_xmit_queue); | |
443 | skb_queue_purge(&scp->other_xmit_queue); | |
444 | skb_queue_purge(&scp->other_receive_queue); | |
445 | ||
446 | dst_release(xchg(&sk->sk_dst_cache, NULL)); | |
447 | } | |
448 | ||
449 | static struct proto dn_proto = { | |
450 | .name = "DECNET", | |
451 | .owner = THIS_MODULE, | |
452 | .obj_size = sizeof(struct dn_sock), | |
453 | }; | |
454 | ||
dd0fc66f | 455 | static struct sock *dn_alloc_sock(struct socket *sock, gfp_t gfp) |
1da177e4 LT |
456 | { |
457 | struct dn_scp *scp; | |
458 | struct sock *sk = sk_alloc(PF_DECnet, gfp, &dn_proto, 1); | |
459 | ||
460 | if (!sk) | |
461 | goto out; | |
462 | ||
463 | if (sock) | |
464 | sock->ops = &dn_proto_ops; | |
465 | sock_init_data(sock, sk); | |
466 | ||
467 | sk->sk_backlog_rcv = dn_nsp_backlog_rcv; | |
468 | sk->sk_destruct = dn_destruct; | |
469 | sk->sk_no_check = 1; | |
470 | sk->sk_family = PF_DECnet; | |
471 | sk->sk_protocol = 0; | |
472 | sk->sk_allocation = gfp; | |
473 | ||
474 | /* Initialization of DECnet Session Control Port */ | |
475 | scp = DN_SK(sk); | |
476 | scp->state = DN_O; /* Open */ | |
477 | scp->numdat = 1; /* Next data seg to tx */ | |
478 | scp->numoth = 1; /* Next oth data to tx */ | |
479 | scp->ackxmt_dat = 0; /* Last data seg ack'ed */ | |
480 | scp->ackxmt_oth = 0; /* Last oth data ack'ed */ | |
481 | scp->ackrcv_dat = 0; /* Highest data ack recv*/ | |
482 | scp->ackrcv_oth = 0; /* Last oth data ack rec*/ | |
483 | scp->flowrem_sw = DN_SEND; | |
484 | scp->flowloc_sw = DN_SEND; | |
485 | scp->flowrem_dat = 0; | |
486 | scp->flowrem_oth = 1; | |
487 | scp->flowloc_dat = 0; | |
488 | scp->flowloc_oth = 1; | |
489 | scp->services_rem = 0; | |
490 | scp->services_loc = 1 | NSP_FC_NONE; | |
491 | scp->info_rem = 0; | |
492 | scp->info_loc = 0x03; /* NSP version 4.1 */ | |
493 | scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */ | |
494 | scp->nonagle = 0; | |
495 | scp->multi_ireq = 1; | |
496 | scp->accept_mode = ACC_IMMED; | |
497 | scp->addr.sdn_family = AF_DECnet; | |
498 | scp->peer.sdn_family = AF_DECnet; | |
499 | scp->accessdata.acc_accl = 5; | |
500 | memcpy(scp->accessdata.acc_acc, "LINUX", 5); | |
501 | ||
502 | scp->max_window = NSP_MAX_WINDOW; | |
503 | scp->snd_window = NSP_MIN_WINDOW; | |
504 | scp->nsp_srtt = NSP_INITIAL_SRTT; | |
505 | scp->nsp_rttvar = NSP_INITIAL_RTTVAR; | |
506 | scp->nsp_rxtshift = 0; | |
507 | ||
508 | skb_queue_head_init(&scp->data_xmit_queue); | |
509 | skb_queue_head_init(&scp->other_xmit_queue); | |
510 | skb_queue_head_init(&scp->other_receive_queue); | |
511 | ||
512 | scp->persist = 0; | |
513 | scp->persist_fxn = NULL; | |
514 | scp->keepalive = 10 * HZ; | |
515 | scp->keepalive_fxn = dn_keepalive; | |
516 | ||
517 | init_timer(&scp->delack_timer); | |
518 | scp->delack_pending = 0; | |
519 | scp->delack_fxn = dn_nsp_delayed_ack; | |
520 | ||
521 | dn_start_slow_timer(sk); | |
522 | out: | |
523 | return sk; | |
524 | } | |
525 | ||
526 | /* | |
527 | * Keepalive timer. | |
528 | * FIXME: Should respond to SO_KEEPALIVE etc. | |
529 | */ | |
530 | static void dn_keepalive(struct sock *sk) | |
531 | { | |
532 | struct dn_scp *scp = DN_SK(sk); | |
533 | ||
534 | /* | |
535 | * By checking the other_data transmit queue is empty | |
536 | * we are double checking that we are not sending too | |
537 | * many of these keepalive frames. | |
538 | */ | |
b03efcfb | 539 | if (skb_queue_empty(&scp->other_xmit_queue)) |
1da177e4 LT |
540 | dn_nsp_send_link(sk, DN_NOCHANGE, 0); |
541 | } | |
542 | ||
543 | ||
544 | /* | |
545 | * Timer for shutdown/destroyed sockets. | |
546 | * When socket is dead & no packets have been sent for a | |
547 | * certain amount of time, they are removed by this | |
548 | * routine. Also takes care of sending out DI & DC | |
549 | * frames at correct times. | |
550 | */ | |
551 | int dn_destroy_timer(struct sock *sk) | |
552 | { | |
553 | struct dn_scp *scp = DN_SK(sk); | |
554 | ||
555 | scp->persist = dn_nsp_persist(sk); | |
556 | ||
557 | switch(scp->state) { | |
558 | case DN_DI: | |
559 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC); | |
560 | if (scp->nsp_rxtshift >= decnet_di_count) | |
561 | scp->state = DN_CN; | |
562 | return 0; | |
563 | ||
564 | case DN_DR: | |
565 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC); | |
566 | if (scp->nsp_rxtshift >= decnet_dr_count) | |
567 | scp->state = DN_DRC; | |
568 | return 0; | |
569 | ||
570 | case DN_DN: | |
571 | if (scp->nsp_rxtshift < decnet_dn_count) { | |
572 | /* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */ | |
573 | dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC); | |
574 | return 0; | |
575 | } | |
576 | } | |
577 | ||
578 | scp->persist = (HZ * decnet_time_wait); | |
579 | ||
580 | if (sk->sk_socket) | |
581 | return 0; | |
582 | ||
583 | if ((jiffies - scp->stamp) >= (HZ * decnet_time_wait)) { | |
584 | dn_unhash_sock(sk); | |
585 | sock_put(sk); | |
586 | return 1; | |
587 | } | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | static void dn_destroy_sock(struct sock *sk) | |
593 | { | |
594 | struct dn_scp *scp = DN_SK(sk); | |
595 | ||
596 | scp->nsp_rxtshift = 0; /* reset back off */ | |
597 | ||
598 | if (sk->sk_socket) { | |
599 | if (sk->sk_socket->state != SS_UNCONNECTED) | |
600 | sk->sk_socket->state = SS_DISCONNECTING; | |
601 | } | |
602 | ||
603 | sk->sk_state = TCP_CLOSE; | |
604 | ||
605 | switch(scp->state) { | |
606 | case DN_DN: | |
607 | dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, | |
608 | sk->sk_allocation); | |
609 | scp->persist_fxn = dn_destroy_timer; | |
610 | scp->persist = dn_nsp_persist(sk); | |
611 | break; | |
612 | case DN_CR: | |
613 | scp->state = DN_DR; | |
614 | goto disc_reject; | |
615 | case DN_RUN: | |
616 | scp->state = DN_DI; | |
617 | case DN_DI: | |
618 | case DN_DR: | |
619 | disc_reject: | |
620 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation); | |
621 | case DN_NC: | |
622 | case DN_NR: | |
623 | case DN_RJ: | |
624 | case DN_DIC: | |
625 | case DN_CN: | |
626 | case DN_DRC: | |
627 | case DN_CI: | |
628 | case DN_CD: | |
629 | scp->persist_fxn = dn_destroy_timer; | |
630 | scp->persist = dn_nsp_persist(sk); | |
631 | break; | |
632 | default: | |
633 | printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n"); | |
634 | case DN_O: | |
635 | dn_stop_slow_timer(sk); | |
636 | ||
637 | dn_unhash_sock_bh(sk); | |
638 | sock_put(sk); | |
639 | ||
640 | break; | |
641 | } | |
642 | } | |
643 | ||
644 | char *dn_addr2asc(dn_address addr, char *buf) | |
645 | { | |
646 | unsigned short node, area; | |
647 | ||
648 | node = addr & 0x03ff; | |
649 | area = addr >> 10; | |
650 | sprintf(buf, "%hd.%hd", area, node); | |
651 | ||
652 | return buf; | |
653 | } | |
654 | ||
655 | ||
656 | ||
657 | static int dn_create(struct socket *sock, int protocol) | |
658 | { | |
659 | struct sock *sk; | |
660 | ||
661 | switch(sock->type) { | |
662 | case SOCK_SEQPACKET: | |
663 | if (protocol != DNPROTO_NSP) | |
664 | return -EPROTONOSUPPORT; | |
665 | break; | |
666 | case SOCK_STREAM: | |
667 | break; | |
668 | default: | |
669 | return -ESOCKTNOSUPPORT; | |
670 | } | |
671 | ||
672 | ||
673 | if ((sk = dn_alloc_sock(sock, GFP_KERNEL)) == NULL) | |
674 | return -ENOBUFS; | |
675 | ||
676 | sk->sk_protocol = protocol; | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | ||
682 | static int | |
683 | dn_release(struct socket *sock) | |
684 | { | |
685 | struct sock *sk = sock->sk; | |
686 | ||
687 | if (sk) { | |
688 | sock_orphan(sk); | |
689 | sock_hold(sk); | |
690 | lock_sock(sk); | |
691 | dn_destroy_sock(sk); | |
692 | release_sock(sk); | |
693 | sock_put(sk); | |
694 | } | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
700 | { | |
701 | struct sock *sk = sock->sk; | |
702 | struct dn_scp *scp = DN_SK(sk); | |
703 | struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr; | |
704 | struct net_device *dev; | |
705 | int rv; | |
706 | ||
707 | if (addr_len != sizeof(struct sockaddr_dn)) | |
708 | return -EINVAL; | |
709 | ||
710 | if (saddr->sdn_family != AF_DECnet) | |
711 | return -EINVAL; | |
712 | ||
713 | if (dn_ntohs(saddr->sdn_nodeaddrl) && (dn_ntohs(saddr->sdn_nodeaddrl) != 2)) | |
714 | return -EINVAL; | |
715 | ||
716 | if (dn_ntohs(saddr->sdn_objnamel) > DN_MAXOBJL) | |
717 | return -EINVAL; | |
718 | ||
719 | if (saddr->sdn_flags & ~SDF_WILD) | |
720 | return -EINVAL; | |
721 | ||
722 | #if 1 | |
723 | if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum || | |
724 | (saddr->sdn_flags & SDF_WILD))) | |
725 | return -EACCES; | |
726 | #else | |
727 | /* | |
728 | * Maybe put the default actions in the default security ops for | |
729 | * dn_prot_sock ? Would be nice if the capable call would go there | |
730 | * too. | |
731 | */ | |
732 | if (security_dn_prot_sock(saddr) && | |
733 | !capable(CAP_NET_BIND_SERVICE) || | |
734 | saddr->sdn_objnum || (saddr->sdn_flags & SDF_WILD)) | |
735 | return -EACCES; | |
736 | #endif | |
737 | ||
738 | ||
739 | if (!(saddr->sdn_flags & SDF_WILD)) { | |
740 | if (dn_ntohs(saddr->sdn_nodeaddrl)) { | |
741 | read_lock(&dev_base_lock); | |
742 | for(dev = dev_base; dev; dev = dev->next) { | |
743 | if (!dev->dn_ptr) | |
744 | continue; | |
745 | if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) | |
746 | break; | |
747 | } | |
748 | read_unlock(&dev_base_lock); | |
749 | if (dev == NULL) | |
750 | return -EADDRNOTAVAIL; | |
751 | } | |
752 | } | |
753 | ||
754 | rv = -EINVAL; | |
755 | lock_sock(sk); | |
756 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
757 | memcpy(&scp->addr, saddr, addr_len); | |
758 | sock_reset_flag(sk, SOCK_ZAPPED); | |
759 | ||
760 | rv = dn_hash_sock(sk); | |
761 | if (rv) | |
762 | sock_set_flag(sk, SOCK_ZAPPED); | |
763 | } | |
764 | release_sock(sk); | |
765 | ||
766 | return rv; | |
767 | } | |
768 | ||
769 | ||
770 | static int dn_auto_bind(struct socket *sock) | |
771 | { | |
772 | struct sock *sk = sock->sk; | |
773 | struct dn_scp *scp = DN_SK(sk); | |
774 | int rv; | |
775 | ||
776 | sock_reset_flag(sk, SOCK_ZAPPED); | |
777 | ||
778 | scp->addr.sdn_flags = 0; | |
779 | scp->addr.sdn_objnum = 0; | |
780 | ||
781 | /* | |
782 | * This stuff is to keep compatibility with Eduardo's | |
783 | * patch. I hope I can dispense with it shortly... | |
784 | */ | |
785 | if ((scp->accessdata.acc_accl != 0) && | |
786 | (scp->accessdata.acc_accl <= 12)) { | |
787 | ||
788 | scp->addr.sdn_objnamel = dn_htons(scp->accessdata.acc_accl); | |
789 | memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, dn_ntohs(scp->addr.sdn_objnamel)); | |
790 | ||
791 | scp->accessdata.acc_accl = 0; | |
792 | memset(scp->accessdata.acc_acc, 0, 40); | |
793 | } | |
794 | /* End of compatibility stuff */ | |
795 | ||
796 | scp->addr.sdn_add.a_len = dn_htons(2); | |
797 | rv = dn_dev_bind_default((dn_address *)scp->addr.sdn_add.a_addr); | |
798 | if (rv == 0) { | |
799 | rv = dn_hash_sock(sk); | |
800 | if (rv) | |
801 | sock_set_flag(sk, SOCK_ZAPPED); | |
802 | } | |
803 | ||
804 | return rv; | |
805 | } | |
806 | ||
dd0fc66f | 807 | static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation) |
1da177e4 LT |
808 | { |
809 | struct dn_scp *scp = DN_SK(sk); | |
810 | DEFINE_WAIT(wait); | |
811 | int err; | |
812 | ||
813 | if (scp->state != DN_CR) | |
814 | return -EINVAL; | |
815 | ||
816 | scp->state = DN_CC; | |
817 | scp->segsize_loc = dst_metric(__sk_dst_get(sk), RTAX_ADVMSS); | |
818 | dn_send_conn_conf(sk, allocation); | |
819 | ||
820 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
821 | for(;;) { | |
822 | release_sock(sk); | |
823 | if (scp->state == DN_CC) | |
824 | *timeo = schedule_timeout(*timeo); | |
825 | lock_sock(sk); | |
826 | err = 0; | |
827 | if (scp->state == DN_RUN) | |
828 | break; | |
829 | err = sock_error(sk); | |
830 | if (err) | |
831 | break; | |
832 | err = sock_intr_errno(*timeo); | |
833 | if (signal_pending(current)) | |
834 | break; | |
835 | err = -EAGAIN; | |
836 | if (!*timeo) | |
837 | break; | |
838 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
839 | } | |
840 | finish_wait(sk->sk_sleep, &wait); | |
841 | if (err == 0) { | |
842 | sk->sk_socket->state = SS_CONNECTED; | |
843 | } else if (scp->state != DN_CC) { | |
844 | sk->sk_socket->state = SS_UNCONNECTED; | |
845 | } | |
846 | return err; | |
847 | } | |
848 | ||
849 | static int dn_wait_run(struct sock *sk, long *timeo) | |
850 | { | |
851 | struct dn_scp *scp = DN_SK(sk); | |
852 | DEFINE_WAIT(wait); | |
853 | int err = 0; | |
854 | ||
855 | if (scp->state == DN_RUN) | |
856 | goto out; | |
857 | ||
858 | if (!*timeo) | |
859 | return -EALREADY; | |
860 | ||
861 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
862 | for(;;) { | |
863 | release_sock(sk); | |
864 | if (scp->state == DN_CI || scp->state == DN_CC) | |
865 | *timeo = schedule_timeout(*timeo); | |
866 | lock_sock(sk); | |
867 | err = 0; | |
868 | if (scp->state == DN_RUN) | |
869 | break; | |
870 | err = sock_error(sk); | |
871 | if (err) | |
872 | break; | |
873 | err = sock_intr_errno(*timeo); | |
874 | if (signal_pending(current)) | |
875 | break; | |
876 | err = -ETIMEDOUT; | |
877 | if (!*timeo) | |
878 | break; | |
879 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
880 | } | |
881 | finish_wait(sk->sk_sleep, &wait); | |
882 | out: | |
883 | if (err == 0) { | |
884 | sk->sk_socket->state = SS_CONNECTED; | |
885 | } else if (scp->state != DN_CI && scp->state != DN_CC) { | |
886 | sk->sk_socket->state = SS_UNCONNECTED; | |
887 | } | |
888 | return err; | |
889 | } | |
890 | ||
891 | static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) | |
892 | { | |
893 | struct socket *sock = sk->sk_socket; | |
894 | struct dn_scp *scp = DN_SK(sk); | |
895 | int err = -EISCONN; | |
896 | struct flowi fl; | |
897 | ||
898 | if (sock->state == SS_CONNECTED) | |
899 | goto out; | |
900 | ||
901 | if (sock->state == SS_CONNECTING) { | |
902 | err = 0; | |
903 | if (scp->state == DN_RUN) { | |
904 | sock->state = SS_CONNECTED; | |
905 | goto out; | |
906 | } | |
907 | err = -ECONNREFUSED; | |
908 | if (scp->state != DN_CI && scp->state != DN_CC) { | |
909 | sock->state = SS_UNCONNECTED; | |
910 | goto out; | |
911 | } | |
912 | return dn_wait_run(sk, timeo); | |
913 | } | |
914 | ||
915 | err = -EINVAL; | |
916 | if (scp->state != DN_O) | |
917 | goto out; | |
918 | ||
919 | if (addr == NULL || addrlen != sizeof(struct sockaddr_dn)) | |
920 | goto out; | |
921 | if (addr->sdn_family != AF_DECnet) | |
922 | goto out; | |
923 | if (addr->sdn_flags & SDF_WILD) | |
924 | goto out; | |
925 | ||
926 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
927 | err = dn_auto_bind(sk->sk_socket); | |
928 | if (err) | |
929 | goto out; | |
930 | } | |
931 | ||
932 | memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn)); | |
933 | ||
934 | err = -EHOSTUNREACH; | |
935 | memset(&fl, 0, sizeof(fl)); | |
936 | fl.oif = sk->sk_bound_dev_if; | |
937 | fl.fld_dst = dn_saddr2dn(&scp->peer); | |
938 | fl.fld_src = dn_saddr2dn(&scp->addr); | |
939 | dn_sk_ports_copy(&fl, scp); | |
940 | fl.proto = DNPROTO_NSP; | |
941 | if (dn_route_output_sock(&sk->sk_dst_cache, &fl, sk, flags) < 0) | |
942 | goto out; | |
943 | sk->sk_route_caps = sk->sk_dst_cache->dev->features; | |
944 | sock->state = SS_CONNECTING; | |
945 | scp->state = DN_CI; | |
946 | scp->segsize_loc = dst_metric(sk->sk_dst_cache, RTAX_ADVMSS); | |
947 | ||
948 | dn_nsp_send_conninit(sk, NSP_CI); | |
949 | err = -EINPROGRESS; | |
950 | if (*timeo) { | |
951 | err = dn_wait_run(sk, timeo); | |
952 | } | |
953 | out: | |
954 | return err; | |
955 | } | |
956 | ||
957 | static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags) | |
958 | { | |
959 | struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr; | |
960 | struct sock *sk = sock->sk; | |
961 | int err; | |
962 | long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
963 | ||
964 | lock_sock(sk); | |
965 | err = __dn_connect(sk, addr, addrlen, &timeo, 0); | |
966 | release_sock(sk); | |
967 | ||
968 | return err; | |
969 | } | |
970 | ||
971 | static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) | |
972 | { | |
973 | struct dn_scp *scp = DN_SK(sk); | |
974 | ||
975 | switch(scp->state) { | |
976 | case DN_RUN: | |
977 | return 0; | |
978 | case DN_CR: | |
979 | return dn_confirm_accept(sk, timeo, sk->sk_allocation); | |
980 | case DN_CI: | |
981 | case DN_CC: | |
982 | return dn_wait_run(sk, timeo); | |
983 | case DN_O: | |
984 | return __dn_connect(sk, addr, addrlen, timeo, flags); | |
985 | } | |
986 | ||
987 | return -EINVAL; | |
988 | } | |
989 | ||
990 | ||
991 | static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc) | |
992 | { | |
993 | unsigned char *ptr = skb->data; | |
994 | ||
995 | acc->acc_userl = *ptr++; | |
996 | memcpy(&acc->acc_user, ptr, acc->acc_userl); | |
997 | ptr += acc->acc_userl; | |
998 | ||
999 | acc->acc_passl = *ptr++; | |
1000 | memcpy(&acc->acc_pass, ptr, acc->acc_passl); | |
1001 | ptr += acc->acc_passl; | |
1002 | ||
1003 | acc->acc_accl = *ptr++; | |
1004 | memcpy(&acc->acc_acc, ptr, acc->acc_accl); | |
1005 | ||
1006 | skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3); | |
1007 | ||
1008 | } | |
1009 | ||
1010 | static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt) | |
1011 | { | |
1012 | unsigned char *ptr = skb->data; | |
1013 | ||
1014 | opt->opt_optl = *ptr++; | |
1015 | opt->opt_status = 0; | |
1016 | memcpy(opt->opt_data, ptr, opt->opt_optl); | |
1017 | skb_pull(skb, opt->opt_optl + 1); | |
1018 | ||
1019 | } | |
1020 | ||
1021 | static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo) | |
1022 | { | |
1023 | DEFINE_WAIT(wait); | |
1024 | struct sk_buff *skb = NULL; | |
1025 | int err = 0; | |
1026 | ||
1027 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
1028 | for(;;) { | |
1029 | release_sock(sk); | |
1030 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1031 | if (skb == NULL) { | |
1032 | *timeo = schedule_timeout(*timeo); | |
1033 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1034 | } | |
1035 | lock_sock(sk); | |
1036 | if (skb != NULL) | |
1037 | break; | |
1038 | err = -EINVAL; | |
1039 | if (sk->sk_state != TCP_LISTEN) | |
1040 | break; | |
1041 | err = sock_intr_errno(*timeo); | |
1042 | if (signal_pending(current)) | |
1043 | break; | |
1044 | err = -EAGAIN; | |
1045 | if (!*timeo) | |
1046 | break; | |
1047 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
1048 | } | |
1049 | finish_wait(sk->sk_sleep, &wait); | |
1050 | ||
1051 | return skb == NULL ? ERR_PTR(err) : skb; | |
1052 | } | |
1053 | ||
1054 | static int dn_accept(struct socket *sock, struct socket *newsock, int flags) | |
1055 | { | |
1056 | struct sock *sk = sock->sk, *newsk; | |
1057 | struct sk_buff *skb = NULL; | |
1058 | struct dn_skb_cb *cb; | |
1059 | unsigned char menuver; | |
1060 | int err = 0; | |
1061 | unsigned char type; | |
1062 | long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1063 | ||
1064 | lock_sock(sk); | |
1065 | ||
1066 | if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) { | |
1067 | release_sock(sk); | |
1068 | return -EINVAL; | |
1069 | } | |
1070 | ||
1071 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1072 | if (skb == NULL) { | |
1073 | skb = dn_wait_for_connect(sk, &timeo); | |
1074 | if (IS_ERR(skb)) { | |
1075 | release_sock(sk); | |
1076 | return PTR_ERR(skb); | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | cb = DN_SKB_CB(skb); | |
1081 | sk->sk_ack_backlog--; | |
1082 | newsk = dn_alloc_sock(newsock, sk->sk_allocation); | |
1083 | if (newsk == NULL) { | |
1084 | release_sock(sk); | |
1085 | kfree_skb(skb); | |
1086 | return -ENOBUFS; | |
1087 | } | |
1088 | release_sock(sk); | |
1089 | ||
1090 | dst_release(xchg(&newsk->sk_dst_cache, skb->dst)); | |
1091 | skb->dst = NULL; | |
1092 | ||
1093 | DN_SK(newsk)->state = DN_CR; | |
1094 | DN_SK(newsk)->addrrem = cb->src_port; | |
1095 | DN_SK(newsk)->services_rem = cb->services; | |
1096 | DN_SK(newsk)->info_rem = cb->info; | |
1097 | DN_SK(newsk)->segsize_rem = cb->segsize; | |
1098 | DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode; | |
1099 | ||
1100 | if (DN_SK(newsk)->segsize_rem < 230) | |
1101 | DN_SK(newsk)->segsize_rem = 230; | |
1102 | ||
1103 | if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE) | |
1104 | DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd; | |
1105 | ||
1106 | newsk->sk_state = TCP_LISTEN; | |
1107 | memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn)); | |
1108 | ||
1109 | /* | |
1110 | * If we are listening on a wild socket, we don't want | |
1111 | * the newly created socket on the wrong hash queue. | |
1112 | */ | |
1113 | DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD; | |
1114 | ||
1115 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type)); | |
1116 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type)); | |
1117 | *(dn_address *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src; | |
1118 | *(dn_address *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst; | |
1119 | ||
1120 | menuver = *skb->data; | |
1121 | skb_pull(skb, 1); | |
1122 | ||
1123 | if (menuver & DN_MENUVER_ACC) | |
1124 | dn_access_copy(skb, &(DN_SK(newsk)->accessdata)); | |
1125 | ||
1126 | if (menuver & DN_MENUVER_USR) | |
1127 | dn_user_copy(skb, &(DN_SK(newsk)->conndata_in)); | |
1128 | ||
1129 | if (menuver & DN_MENUVER_PRX) | |
1130 | DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY; | |
1131 | ||
1132 | if (menuver & DN_MENUVER_UIC) | |
1133 | DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY; | |
1134 | ||
1135 | kfree_skb(skb); | |
1136 | ||
1137 | memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out), | |
1138 | sizeof(struct optdata_dn)); | |
1139 | memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out), | |
1140 | sizeof(struct optdata_dn)); | |
1141 | ||
1142 | lock_sock(newsk); | |
1143 | err = dn_hash_sock(newsk); | |
1144 | if (err == 0) { | |
1145 | sock_reset_flag(newsk, SOCK_ZAPPED); | |
1146 | dn_send_conn_ack(newsk); | |
1147 | ||
1148 | /* | |
1149 | * Here we use sk->sk_allocation since although the conn conf is | |
1150 | * for the newsk, the context is the old socket. | |
1151 | */ | |
1152 | if (DN_SK(newsk)->accept_mode == ACC_IMMED) | |
1153 | err = dn_confirm_accept(newsk, &timeo, | |
1154 | sk->sk_allocation); | |
1155 | } | |
1156 | release_sock(newsk); | |
1157 | return err; | |
1158 | } | |
1159 | ||
1160 | ||
1161 | static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int *uaddr_len,int peer) | |
1162 | { | |
1163 | struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr; | |
1164 | struct sock *sk = sock->sk; | |
1165 | struct dn_scp *scp = DN_SK(sk); | |
1166 | ||
1167 | *uaddr_len = sizeof(struct sockaddr_dn); | |
1168 | ||
1169 | lock_sock(sk); | |
1170 | ||
1171 | if (peer) { | |
1172 | if ((sock->state != SS_CONNECTED && | |
1173 | sock->state != SS_CONNECTING) && | |
1174 | scp->accept_mode == ACC_IMMED) | |
1175 | return -ENOTCONN; | |
1176 | ||
1177 | memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn)); | |
1178 | } else { | |
1179 | memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn)); | |
1180 | } | |
1181 | ||
1182 | release_sock(sk); | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | ||
1188 | static unsigned int dn_poll(struct file *file, struct socket *sock, poll_table *wait) | |
1189 | { | |
1190 | struct sock *sk = sock->sk; | |
1191 | struct dn_scp *scp = DN_SK(sk); | |
1192 | int mask = datagram_poll(file, sock, wait); | |
1193 | ||
b03efcfb | 1194 | if (!skb_queue_empty(&scp->other_receive_queue)) |
1da177e4 LT |
1195 | mask |= POLLRDBAND; |
1196 | ||
1197 | return mask; | |
1198 | } | |
1199 | ||
1200 | static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1201 | { | |
1202 | struct sock *sk = sock->sk; | |
1203 | struct dn_scp *scp = DN_SK(sk); | |
1204 | int err = -EOPNOTSUPP; | |
1205 | long amount = 0; | |
1206 | struct sk_buff *skb; | |
1207 | int val; | |
1208 | ||
1209 | switch(cmd) | |
1210 | { | |
1211 | case SIOCGIFADDR: | |
1212 | case SIOCSIFADDR: | |
1213 | return dn_dev_ioctl(cmd, (void __user *)arg); | |
1214 | ||
1215 | case SIOCATMARK: | |
1216 | lock_sock(sk); | |
b03efcfb | 1217 | val = !skb_queue_empty(&scp->other_receive_queue); |
1da177e4 LT |
1218 | if (scp->state != DN_RUN) |
1219 | val = -ENOTCONN; | |
1220 | release_sock(sk); | |
1221 | return val; | |
1222 | ||
1223 | case TIOCOUTQ: | |
1224 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1225 | if (amount < 0) | |
1226 | amount = 0; | |
1227 | err = put_user(amount, (int __user *)arg); | |
1228 | break; | |
1229 | ||
1230 | case TIOCINQ: | |
1231 | lock_sock(sk); | |
1232 | if ((skb = skb_peek(&scp->other_receive_queue)) != NULL) { | |
1233 | amount = skb->len; | |
1234 | } else { | |
1235 | struct sk_buff *skb = sk->sk_receive_queue.next; | |
1236 | for(;;) { | |
1237 | if (skb == | |
1238 | (struct sk_buff *)&sk->sk_receive_queue) | |
1239 | break; | |
1240 | amount += skb->len; | |
1241 | skb = skb->next; | |
1242 | } | |
1243 | } | |
1244 | release_sock(sk); | |
1245 | err = put_user(amount, (int __user *)arg); | |
1246 | break; | |
1247 | ||
1248 | default: | |
1249 | err = dev_ioctl(cmd, (void __user *)arg); | |
1250 | break; | |
1251 | } | |
1252 | ||
1253 | return err; | |
1254 | } | |
1255 | ||
1256 | static int dn_listen(struct socket *sock, int backlog) | |
1257 | { | |
1258 | struct sock *sk = sock->sk; | |
1259 | int err = -EINVAL; | |
1260 | ||
1261 | lock_sock(sk); | |
1262 | ||
1263 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1264 | goto out; | |
1265 | ||
1266 | if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN)) | |
1267 | goto out; | |
1268 | ||
1269 | sk->sk_max_ack_backlog = backlog; | |
1270 | sk->sk_ack_backlog = 0; | |
1271 | sk->sk_state = TCP_LISTEN; | |
1272 | err = 0; | |
1273 | dn_rehash_sock(sk); | |
1274 | ||
1275 | out: | |
1276 | release_sock(sk); | |
1277 | ||
1278 | return err; | |
1279 | } | |
1280 | ||
1281 | ||
1282 | static int dn_shutdown(struct socket *sock, int how) | |
1283 | { | |
1284 | struct sock *sk = sock->sk; | |
1285 | struct dn_scp *scp = DN_SK(sk); | |
1286 | int err = -ENOTCONN; | |
1287 | ||
1288 | lock_sock(sk); | |
1289 | ||
1290 | if (sock->state == SS_UNCONNECTED) | |
1291 | goto out; | |
1292 | ||
1293 | err = 0; | |
1294 | if (sock->state == SS_DISCONNECTING) | |
1295 | goto out; | |
1296 | ||
1297 | err = -EINVAL; | |
1298 | if (scp->state == DN_O) | |
1299 | goto out; | |
1300 | ||
1301 | if (how != SHUTDOWN_MASK) | |
1302 | goto out; | |
1303 | ||
1304 | sk->sk_shutdown = how; | |
1305 | dn_destroy_sock(sk); | |
1306 | err = 0; | |
1307 | ||
1308 | out: | |
1309 | release_sock(sk); | |
1310 | ||
1311 | return err; | |
1312 | } | |
1313 | ||
1314 | static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
1315 | { | |
1316 | struct sock *sk = sock->sk; | |
1317 | int err; | |
1318 | ||
1319 | lock_sock(sk); | |
1320 | err = __dn_setsockopt(sock, level, optname, optval, optlen, 0); | |
1321 | release_sock(sk); | |
1322 | ||
1323 | return err; | |
1324 | } | |
1325 | ||
1326 | static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, int optlen, int flags) | |
1327 | { | |
1328 | struct sock *sk = sock->sk; | |
1329 | struct dn_scp *scp = DN_SK(sk); | |
1330 | long timeo; | |
1331 | union { | |
1332 | struct optdata_dn opt; | |
1333 | struct accessdata_dn acc; | |
1334 | int mode; | |
1335 | unsigned long win; | |
1336 | int val; | |
1337 | unsigned char services; | |
1338 | unsigned char info; | |
1339 | } u; | |
1340 | int err; | |
1341 | ||
1342 | if (optlen && !optval) | |
1343 | return -EINVAL; | |
1344 | ||
1345 | if (optlen > sizeof(u)) | |
1346 | return -EINVAL; | |
1347 | ||
1348 | if (copy_from_user(&u, optval, optlen)) | |
1349 | return -EFAULT; | |
1350 | ||
1351 | switch(optname) { | |
1352 | case DSO_CONDATA: | |
1353 | if (sock->state == SS_CONNECTED) | |
1354 | return -EISCONN; | |
1355 | if ((scp->state != DN_O) && (scp->state != DN_CR)) | |
1356 | return -EINVAL; | |
1357 | ||
1358 | if (optlen != sizeof(struct optdata_dn)) | |
1359 | return -EINVAL; | |
1360 | ||
1361 | if (u.opt.opt_optl > 16) | |
1362 | return -EINVAL; | |
1363 | ||
1364 | memcpy(&scp->conndata_out, &u.opt, optlen); | |
1365 | break; | |
1366 | ||
1367 | case DSO_DISDATA: | |
1368 | if (sock->state != SS_CONNECTED && scp->accept_mode == ACC_IMMED) | |
1369 | return -ENOTCONN; | |
1370 | ||
1371 | if (optlen != sizeof(struct optdata_dn)) | |
1372 | return -EINVAL; | |
1373 | ||
1374 | if (u.opt.opt_optl > 16) | |
1375 | return -EINVAL; | |
1376 | ||
1377 | memcpy(&scp->discdata_out, &u.opt, optlen); | |
1378 | break; | |
1379 | ||
1380 | case DSO_CONACCESS: | |
1381 | if (sock->state == SS_CONNECTED) | |
1382 | return -EISCONN; | |
1383 | if (scp->state != DN_O) | |
1384 | return -EINVAL; | |
1385 | ||
1386 | if (optlen != sizeof(struct accessdata_dn)) | |
1387 | return -EINVAL; | |
1388 | ||
1389 | if ((u.acc.acc_accl > DN_MAXACCL) || | |
1390 | (u.acc.acc_passl > DN_MAXACCL) || | |
1391 | (u.acc.acc_userl > DN_MAXACCL)) | |
1392 | return -EINVAL; | |
1393 | ||
1394 | memcpy(&scp->accessdata, &u.acc, optlen); | |
1395 | break; | |
1396 | ||
1397 | case DSO_ACCEPTMODE: | |
1398 | if (sock->state == SS_CONNECTED) | |
1399 | return -EISCONN; | |
1400 | if (scp->state != DN_O) | |
1401 | return -EINVAL; | |
1402 | ||
1403 | if (optlen != sizeof(int)) | |
1404 | return -EINVAL; | |
1405 | ||
1406 | if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER)) | |
1407 | return -EINVAL; | |
1408 | ||
1409 | scp->accept_mode = (unsigned char)u.mode; | |
1410 | break; | |
1411 | ||
1412 | case DSO_CONACCEPT: | |
1413 | ||
1414 | if (scp->state != DN_CR) | |
1415 | return -EINVAL; | |
1416 | timeo = sock_rcvtimeo(sk, 0); | |
1417 | err = dn_confirm_accept(sk, &timeo, sk->sk_allocation); | |
1418 | return err; | |
1419 | ||
1420 | case DSO_CONREJECT: | |
1421 | ||
1422 | if (scp->state != DN_CR) | |
1423 | return -EINVAL; | |
1424 | ||
1425 | scp->state = DN_DR; | |
1426 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1427 | dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation); | |
1428 | break; | |
1429 | ||
1430 | default: | |
1431 | #ifdef CONFIG_NETFILTER | |
1432 | return nf_setsockopt(sk, PF_DECnet, optname, optval, optlen); | |
1433 | #endif | |
1434 | case DSO_LINKINFO: | |
1435 | case DSO_STREAM: | |
1436 | case DSO_SEQPACKET: | |
1437 | return -ENOPROTOOPT; | |
1438 | ||
1439 | case DSO_MAXWINDOW: | |
1440 | if (optlen != sizeof(unsigned long)) | |
1441 | return -EINVAL; | |
1442 | if (u.win > NSP_MAX_WINDOW) | |
1443 | u.win = NSP_MAX_WINDOW; | |
1444 | if (u.win == 0) | |
1445 | return -EINVAL; | |
1446 | scp->max_window = u.win; | |
1447 | if (scp->snd_window > u.win) | |
1448 | scp->snd_window = u.win; | |
1449 | break; | |
1450 | ||
1451 | case DSO_NODELAY: | |
1452 | if (optlen != sizeof(int)) | |
1453 | return -EINVAL; | |
1454 | if (scp->nonagle == 2) | |
1455 | return -EINVAL; | |
1456 | scp->nonagle = (u.val == 0) ? 0 : 1; | |
1457 | /* if (scp->nonagle == 1) { Push pending frames } */ | |
1458 | break; | |
1459 | ||
1460 | case DSO_CORK: | |
1461 | if (optlen != sizeof(int)) | |
1462 | return -EINVAL; | |
1463 | if (scp->nonagle == 1) | |
1464 | return -EINVAL; | |
1465 | scp->nonagle = (u.val == 0) ? 0 : 2; | |
1466 | /* if (scp->nonagle == 0) { Push pending frames } */ | |
1467 | break; | |
1468 | ||
1469 | case DSO_SERVICES: | |
1470 | if (optlen != sizeof(unsigned char)) | |
1471 | return -EINVAL; | |
1472 | if ((u.services & ~NSP_FC_MASK) != 0x01) | |
1473 | return -EINVAL; | |
1474 | if ((u.services & NSP_FC_MASK) == NSP_FC_MASK) | |
1475 | return -EINVAL; | |
1476 | scp->services_loc = u.services; | |
1477 | break; | |
1478 | ||
1479 | case DSO_INFO: | |
1480 | if (optlen != sizeof(unsigned char)) | |
1481 | return -EINVAL; | |
1482 | if (u.info & 0xfc) | |
1483 | return -EINVAL; | |
1484 | scp->info_loc = u.info; | |
1485 | break; | |
1486 | } | |
1487 | ||
1488 | return 0; | |
1489 | } | |
1490 | ||
1491 | static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
1492 | { | |
1493 | struct sock *sk = sock->sk; | |
1494 | int err; | |
1495 | ||
1496 | lock_sock(sk); | |
1497 | err = __dn_getsockopt(sock, level, optname, optval, optlen, 0); | |
1498 | release_sock(sk); | |
1499 | ||
1500 | return err; | |
1501 | } | |
1502 | ||
1503 | static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags) | |
1504 | { | |
1505 | struct sock *sk = sock->sk; | |
1506 | struct dn_scp *scp = DN_SK(sk); | |
1507 | struct linkinfo_dn link; | |
1508 | unsigned int r_len; | |
1509 | void *r_data = NULL; | |
1510 | unsigned int val; | |
1511 | ||
1512 | if(get_user(r_len , optlen)) | |
1513 | return -EFAULT; | |
1514 | ||
1515 | switch(optname) { | |
1516 | case DSO_CONDATA: | |
1517 | if (r_len > sizeof(struct optdata_dn)) | |
1518 | r_len = sizeof(struct optdata_dn); | |
1519 | r_data = &scp->conndata_in; | |
1520 | break; | |
1521 | ||
1522 | case DSO_DISDATA: | |
1523 | if (r_len > sizeof(struct optdata_dn)) | |
1524 | r_len = sizeof(struct optdata_dn); | |
1525 | r_data = &scp->discdata_in; | |
1526 | break; | |
1527 | ||
1528 | case DSO_CONACCESS: | |
1529 | if (r_len > sizeof(struct accessdata_dn)) | |
1530 | r_len = sizeof(struct accessdata_dn); | |
1531 | r_data = &scp->accessdata; | |
1532 | break; | |
1533 | ||
1534 | case DSO_ACCEPTMODE: | |
1535 | if (r_len > sizeof(unsigned char)) | |
1536 | r_len = sizeof(unsigned char); | |
1537 | r_data = &scp->accept_mode; | |
1538 | break; | |
1539 | ||
1540 | case DSO_LINKINFO: | |
1541 | if (r_len > sizeof(struct linkinfo_dn)) | |
1542 | r_len = sizeof(struct linkinfo_dn); | |
1543 | ||
1544 | switch(sock->state) { | |
1545 | case SS_CONNECTING: | |
1546 | link.idn_linkstate = LL_CONNECTING; | |
1547 | break; | |
1548 | case SS_DISCONNECTING: | |
1549 | link.idn_linkstate = LL_DISCONNECTING; | |
1550 | break; | |
1551 | case SS_CONNECTED: | |
1552 | link.idn_linkstate = LL_RUNNING; | |
1553 | break; | |
1554 | default: | |
1555 | link.idn_linkstate = LL_INACTIVE; | |
1556 | } | |
1557 | ||
1558 | link.idn_segsize = scp->segsize_rem; | |
1559 | r_data = &link; | |
1560 | break; | |
1561 | ||
1562 | default: | |
1563 | #ifdef CONFIG_NETFILTER | |
1564 | { | |
1565 | int val, len; | |
1566 | ||
1567 | if(get_user(len, optlen)) | |
1568 | return -EFAULT; | |
1569 | ||
1570 | val = nf_getsockopt(sk, PF_DECnet, optname, | |
1571 | optval, &len); | |
1572 | if (val >= 0) | |
1573 | val = put_user(len, optlen); | |
1574 | return val; | |
1575 | } | |
1576 | #endif | |
1577 | case DSO_STREAM: | |
1578 | case DSO_SEQPACKET: | |
1579 | case DSO_CONACCEPT: | |
1580 | case DSO_CONREJECT: | |
1581 | return -ENOPROTOOPT; | |
1582 | ||
1583 | case DSO_MAXWINDOW: | |
1584 | if (r_len > sizeof(unsigned long)) | |
1585 | r_len = sizeof(unsigned long); | |
1586 | r_data = &scp->max_window; | |
1587 | break; | |
1588 | ||
1589 | case DSO_NODELAY: | |
1590 | if (r_len > sizeof(int)) | |
1591 | r_len = sizeof(int); | |
1592 | val = (scp->nonagle == 1); | |
1593 | r_data = &val; | |
1594 | break; | |
1595 | ||
1596 | case DSO_CORK: | |
1597 | if (r_len > sizeof(int)) | |
1598 | r_len = sizeof(int); | |
1599 | val = (scp->nonagle == 2); | |
1600 | r_data = &val; | |
1601 | break; | |
1602 | ||
1603 | case DSO_SERVICES: | |
1604 | if (r_len > sizeof(unsigned char)) | |
1605 | r_len = sizeof(unsigned char); | |
1606 | r_data = &scp->services_rem; | |
1607 | break; | |
1608 | ||
1609 | case DSO_INFO: | |
1610 | if (r_len > sizeof(unsigned char)) | |
1611 | r_len = sizeof(unsigned char); | |
1612 | r_data = &scp->info_rem; | |
1613 | break; | |
1614 | } | |
1615 | ||
1616 | if (r_data) { | |
1617 | if (copy_to_user(optval, r_data, r_len)) | |
1618 | return -EFAULT; | |
1619 | if (put_user(r_len, optlen)) | |
1620 | return -EFAULT; | |
1621 | } | |
1622 | ||
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | ||
1627 | static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target) | |
1628 | { | |
1629 | struct sk_buff *skb = q->next; | |
1630 | int len = 0; | |
1631 | ||
1632 | if (flags & MSG_OOB) | |
b03efcfb | 1633 | return !skb_queue_empty(q) ? 1 : 0; |
1da177e4 LT |
1634 | |
1635 | while(skb != (struct sk_buff *)q) { | |
1636 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
1637 | len += skb->len; | |
1638 | ||
1639 | if (cb->nsp_flags & 0x40) { | |
1640 | /* SOCK_SEQPACKET reads to EOM */ | |
1641 | if (sk->sk_type == SOCK_SEQPACKET) | |
1642 | return 1; | |
1643 | /* so does SOCK_STREAM unless WAITALL is specified */ | |
1644 | if (!(flags & MSG_WAITALL)) | |
1645 | return 1; | |
1646 | } | |
1647 | ||
1648 | /* minimum data length for read exceeded */ | |
1649 | if (len >= target) | |
1650 | return 1; | |
1651 | ||
1652 | skb = skb->next; | |
1653 | } | |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | ||
1659 | static int dn_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1660 | struct msghdr *msg, size_t size, int flags) | |
1661 | { | |
1662 | struct sock *sk = sock->sk; | |
1663 | struct dn_scp *scp = DN_SK(sk); | |
1664 | struct sk_buff_head *queue = &sk->sk_receive_queue; | |
1665 | size_t target = size > 1 ? 1 : 0; | |
1666 | size_t copied = 0; | |
1667 | int rv = 0; | |
1668 | struct sk_buff *skb, *nskb; | |
1669 | struct dn_skb_cb *cb = NULL; | |
1670 | unsigned char eor = 0; | |
1671 | long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
1672 | ||
1673 | lock_sock(sk); | |
1674 | ||
1675 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1676 | rv = -EADDRNOTAVAIL; | |
1677 | goto out; | |
1678 | } | |
1679 | ||
1680 | rv = dn_check_state(sk, NULL, 0, &timeo, flags); | |
1681 | if (rv) | |
1682 | goto out; | |
1683 | ||
1684 | if (sk->sk_shutdown & RCV_SHUTDOWN) { | |
1685 | if (!(flags & MSG_NOSIGNAL)) | |
1686 | send_sig(SIGPIPE, current, 0); | |
1687 | rv = -EPIPE; | |
1688 | goto out; | |
1689 | } | |
1690 | ||
1691 | if (flags & ~(MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) { | |
1692 | rv = -EOPNOTSUPP; | |
1693 | goto out; | |
1694 | } | |
1695 | ||
1696 | if (flags & MSG_OOB) | |
1697 | queue = &scp->other_receive_queue; | |
1698 | ||
1699 | if (flags & MSG_WAITALL) | |
1700 | target = size; | |
1701 | ||
1702 | ||
1703 | /* | |
1704 | * See if there is data ready to read, sleep if there isn't | |
1705 | */ | |
1706 | for(;;) { | |
1707 | if (sk->sk_err) | |
1708 | goto out; | |
1709 | ||
b03efcfb | 1710 | if (!skb_queue_empty(&scp->other_receive_queue)) { |
1da177e4 LT |
1711 | if (!(flags & MSG_OOB)) { |
1712 | msg->msg_flags |= MSG_OOB; | |
1713 | if (!scp->other_report) { | |
1714 | scp->other_report = 1; | |
1715 | goto out; | |
1716 | } | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | if (scp->state != DN_RUN) | |
1721 | goto out; | |
1722 | ||
1723 | if (signal_pending(current)) { | |
1724 | rv = sock_intr_errno(timeo); | |
1725 | goto out; | |
1726 | } | |
1727 | ||
1728 | if (dn_data_ready(sk, queue, flags, target)) | |
1729 | break; | |
1730 | ||
1731 | if (flags & MSG_DONTWAIT) { | |
1732 | rv = -EWOULDBLOCK; | |
1733 | goto out; | |
1734 | } | |
1735 | ||
1736 | set_bit(SOCK_ASYNC_WAITDATA, &sock->flags); | |
1737 | SOCK_SLEEP_PRE(sk) | |
1738 | ||
1739 | if (!dn_data_ready(sk, queue, flags, target)) | |
1740 | schedule(); | |
1741 | ||
1742 | SOCK_SLEEP_POST(sk) | |
1743 | clear_bit(SOCK_ASYNC_WAITDATA, &sock->flags); | |
1744 | } | |
1745 | ||
1746 | for(skb = queue->next; skb != (struct sk_buff *)queue; skb = nskb) { | |
1747 | unsigned int chunk = skb->len; | |
1748 | cb = DN_SKB_CB(skb); | |
1749 | ||
1750 | if ((chunk + copied) > size) | |
1751 | chunk = size - copied; | |
1752 | ||
1753 | if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) { | |
1754 | rv = -EFAULT; | |
1755 | break; | |
1756 | } | |
1757 | copied += chunk; | |
1758 | ||
1759 | if (!(flags & MSG_PEEK)) | |
1760 | skb_pull(skb, chunk); | |
1761 | ||
1762 | eor = cb->nsp_flags & 0x40; | |
1763 | nskb = skb->next; | |
1764 | ||
1765 | if (skb->len == 0) { | |
8728b834 | 1766 | skb_unlink(skb, queue); |
1da177e4 LT |
1767 | kfree_skb(skb); |
1768 | /* | |
1769 | * N.B. Don't refer to skb or cb after this point | |
1770 | * in loop. | |
1771 | */ | |
1772 | if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) { | |
1773 | scp->flowloc_sw = DN_SEND; | |
1774 | dn_nsp_send_link(sk, DN_SEND, 0); | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | if (eor) { | |
1779 | if (sk->sk_type == SOCK_SEQPACKET) | |
1780 | break; | |
1781 | if (!(flags & MSG_WAITALL)) | |
1782 | break; | |
1783 | } | |
1784 | ||
1785 | if (flags & MSG_OOB) | |
1786 | break; | |
1787 | ||
1788 | if (copied >= target) | |
1789 | break; | |
1790 | } | |
1791 | ||
1792 | rv = copied; | |
1793 | ||
1794 | ||
1795 | if (eor && (sk->sk_type == SOCK_SEQPACKET)) | |
1796 | msg->msg_flags |= MSG_EOR; | |
1797 | ||
1798 | out: | |
1799 | if (rv == 0) | |
1800 | rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk); | |
1801 | ||
1802 | if ((rv >= 0) && msg->msg_name) { | |
1803 | memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn)); | |
1804 | msg->msg_namelen = sizeof(struct sockaddr_dn); | |
1805 | } | |
1806 | ||
1807 | release_sock(sk); | |
1808 | ||
1809 | return rv; | |
1810 | } | |
1811 | ||
1812 | ||
1813 | static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags) | |
1814 | { | |
1815 | unsigned char fctype = scp->services_rem & NSP_FC_MASK; | |
1816 | if (skb_queue_len(queue) >= scp->snd_window) | |
1817 | return 1; | |
1818 | if (fctype != NSP_FC_NONE) { | |
1819 | if (flags & MSG_OOB) { | |
1820 | if (scp->flowrem_oth == 0) | |
1821 | return 1; | |
1822 | } else { | |
1823 | if (scp->flowrem_dat == 0) | |
1824 | return 1; | |
1825 | } | |
1826 | } | |
1827 | return 0; | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * The DECnet spec requires the the "routing layer" accepts packets which | |
1832 | * are at least 230 bytes in size. This excludes any headers which the NSP | |
1833 | * layer might add, so we always assume that we'll be using the maximal | |
1834 | * length header on data packets. The variation in length is due to the | |
1835 | * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't | |
1836 | * make much practical difference. | |
1837 | */ | |
1838 | unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu) | |
1839 | { | |
1840 | unsigned mss = 230 - DN_MAX_NSP_DATA_HEADER; | |
1841 | if (dev) { | |
1842 | struct dn_dev *dn_db = dev->dn_ptr; | |
1843 | mtu -= LL_RESERVED_SPACE(dev); | |
1844 | if (dn_db->use_long) | |
1845 | mtu -= 21; | |
1846 | else | |
1847 | mtu -= 6; | |
1848 | mtu -= DN_MAX_NSP_DATA_HEADER; | |
1849 | } else { | |
1850 | /* | |
1851 | * 21 = long header, 16 = guess at MAC header length | |
1852 | */ | |
1853 | mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16); | |
1854 | } | |
1855 | if (mtu > mss) | |
1856 | mss = mtu; | |
1857 | return mss; | |
1858 | } | |
1859 | ||
1860 | static inline unsigned int dn_current_mss(struct sock *sk, int flags) | |
1861 | { | |
1862 | struct dst_entry *dst = __sk_dst_get(sk); | |
1863 | struct dn_scp *scp = DN_SK(sk); | |
1864 | int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem); | |
1865 | ||
1866 | /* Other data messages are limited to 16 bytes per packet */ | |
1867 | if (flags & MSG_OOB) | |
1868 | return 16; | |
1869 | ||
1870 | /* This works out the maximum size of segment we can send out */ | |
1871 | if (dst) { | |
1872 | u32 mtu = dst_mtu(dst); | |
1873 | mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now); | |
1874 | } | |
1875 | ||
1876 | return mss_now; | |
1877 | } | |
1878 | ||
12a49ffd PC |
1879 | /* |
1880 | * N.B. We get the timeout wrong here, but then we always did get it | |
1881 | * wrong before and this is another step along the road to correcting | |
1882 | * it. It ought to get updated each time we pass through the routine, | |
1883 | * but in practise it probably doesn't matter too much for now. | |
1884 | */ | |
1885 | static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk, | |
1886 | unsigned long datalen, int noblock, | |
1887 | int *errcode) | |
1888 | { | |
1889 | struct sk_buff *skb = sock_alloc_send_skb(sk, datalen, | |
1890 | noblock, errcode); | |
1891 | if (skb) { | |
1892 | skb->protocol = __constant_htons(ETH_P_DNA_RT); | |
1893 | skb->pkt_type = PACKET_OUTGOING; | |
1894 | } | |
1895 | return skb; | |
1896 | } | |
1897 | ||
1da177e4 | 1898 | static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, |
12a49ffd | 1899 | struct msghdr *msg, size_t size) |
1da177e4 LT |
1900 | { |
1901 | struct sock *sk = sock->sk; | |
1902 | struct dn_scp *scp = DN_SK(sk); | |
1903 | size_t mss; | |
1904 | struct sk_buff_head *queue = &scp->data_xmit_queue; | |
1905 | int flags = msg->msg_flags; | |
1906 | int err = 0; | |
1907 | size_t sent = 0; | |
1908 | int addr_len = msg->msg_namelen; | |
1909 | struct sockaddr_dn *addr = (struct sockaddr_dn *)msg->msg_name; | |
1910 | struct sk_buff *skb = NULL; | |
1911 | struct dn_skb_cb *cb; | |
1912 | size_t len; | |
1913 | unsigned char fctype; | |
12a49ffd | 1914 | long timeo; |
1da177e4 LT |
1915 | |
1916 | if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT)) | |
1917 | return -EOPNOTSUPP; | |
1918 | ||
1919 | if (addr_len && (addr_len != sizeof(struct sockaddr_dn))) | |
1920 | return -EINVAL; | |
1921 | ||
12a49ffd PC |
1922 | lock_sock(sk); |
1923 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); | |
1da177e4 LT |
1924 | /* |
1925 | * The only difference between stream sockets and sequenced packet | |
1926 | * sockets is that the stream sockets always behave as if MSG_EOR | |
1927 | * has been set. | |
1928 | */ | |
1929 | if (sock->type == SOCK_STREAM) { | |
12a49ffd PC |
1930 | if (flags & MSG_EOR) { |
1931 | err = -EINVAL; | |
1932 | goto out; | |
1933 | } | |
1da177e4 LT |
1934 | flags |= MSG_EOR; |
1935 | } | |
1936 | ||
1da177e4 LT |
1937 | |
1938 | err = dn_check_state(sk, addr, addr_len, &timeo, flags); | |
1939 | if (err) | |
1940 | goto out_err; | |
1941 | ||
1942 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1943 | err = -EPIPE; | |
1944 | goto out_err; | |
1945 | } | |
1946 | ||
1947 | if ((flags & MSG_TRYHARD) && sk->sk_dst_cache) | |
1948 | dst_negative_advice(&sk->sk_dst_cache); | |
1949 | ||
1950 | mss = scp->segsize_rem; | |
1951 | fctype = scp->services_rem & NSP_FC_MASK; | |
1952 | ||
1953 | mss = dn_current_mss(sk, flags); | |
1954 | ||
1955 | if (flags & MSG_OOB) { | |
1956 | queue = &scp->other_xmit_queue; | |
1957 | if (size > mss) { | |
1958 | err = -EMSGSIZE; | |
1959 | goto out; | |
1960 | } | |
1961 | } | |
1962 | ||
1963 | scp->persist_fxn = dn_nsp_xmit_timeout; | |
1964 | ||
1965 | while(sent < size) { | |
1966 | err = sock_error(sk); | |
1967 | if (err) | |
1968 | goto out; | |
1969 | ||
1970 | if (signal_pending(current)) { | |
1971 | err = sock_intr_errno(timeo); | |
1972 | goto out; | |
1973 | } | |
1974 | ||
1975 | /* | |
1976 | * Calculate size that we wish to send. | |
1977 | */ | |
1978 | len = size - sent; | |
1979 | ||
1980 | if (len > mss) | |
1981 | len = mss; | |
1982 | ||
1983 | /* | |
1984 | * Wait for queue size to go down below the window | |
1985 | * size. | |
1986 | */ | |
1987 | if (dn_queue_too_long(scp, queue, flags)) { | |
1988 | if (flags & MSG_DONTWAIT) { | |
1989 | err = -EWOULDBLOCK; | |
1990 | goto out; | |
1991 | } | |
1992 | ||
1993 | SOCK_SLEEP_PRE(sk) | |
1994 | ||
1995 | if (dn_queue_too_long(scp, queue, flags)) | |
1996 | schedule(); | |
1997 | ||
1998 | SOCK_SLEEP_POST(sk) | |
1999 | ||
2000 | continue; | |
2001 | } | |
2002 | ||
2003 | /* | |
2004 | * Get a suitably sized skb. | |
12a49ffd PC |
2005 | * 64 is a bit of a hack really, but its larger than any |
2006 | * link-layer headers and has served us well as a good | |
2007 | * guess as to their real length. | |
1da177e4 | 2008 | */ |
12a49ffd PC |
2009 | skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER, |
2010 | flags & MSG_DONTWAIT, &err); | |
1da177e4 LT |
2011 | |
2012 | if (err) | |
2013 | break; | |
2014 | ||
2015 | if (!skb) | |
2016 | continue; | |
2017 | ||
2018 | cb = DN_SKB_CB(skb); | |
2019 | ||
12a49ffd | 2020 | skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER); |
1da177e4 LT |
2021 | |
2022 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | |
2023 | err = -EFAULT; | |
2024 | goto out; | |
2025 | } | |
2026 | ||
2027 | if (flags & MSG_OOB) { | |
2028 | cb->nsp_flags = 0x30; | |
2029 | if (fctype != NSP_FC_NONE) | |
2030 | scp->flowrem_oth--; | |
2031 | } else { | |
2032 | cb->nsp_flags = 0x00; | |
2033 | if (scp->seg_total == 0) | |
2034 | cb->nsp_flags |= 0x20; | |
2035 | ||
2036 | scp->seg_total += len; | |
2037 | ||
2038 | if (((sent + len) == size) && (flags & MSG_EOR)) { | |
2039 | cb->nsp_flags |= 0x40; | |
2040 | scp->seg_total = 0; | |
2041 | if (fctype == NSP_FC_SCMC) | |
2042 | scp->flowrem_dat--; | |
2043 | } | |
2044 | if (fctype == NSP_FC_SRC) | |
2045 | scp->flowrem_dat--; | |
2046 | } | |
2047 | ||
2048 | sent += len; | |
2049 | dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB); | |
2050 | skb = NULL; | |
2051 | ||
2052 | scp->persist = dn_nsp_persist(sk); | |
2053 | ||
2054 | } | |
2055 | out: | |
2056 | ||
2057 | if (skb) | |
2058 | kfree_skb(skb); | |
2059 | ||
2060 | release_sock(sk); | |
2061 | ||
2062 | return sent ? sent : err; | |
2063 | ||
2064 | out_err: | |
001ab02a | 2065 | err = sk_stream_error(sk, flags, err); |
1da177e4 LT |
2066 | release_sock(sk); |
2067 | return err; | |
2068 | } | |
2069 | ||
2070 | static int dn_device_event(struct notifier_block *this, unsigned long event, | |
2071 | void *ptr) | |
2072 | { | |
2073 | struct net_device *dev = (struct net_device *)ptr; | |
2074 | ||
2075 | switch(event) { | |
2076 | case NETDEV_UP: | |
2077 | dn_dev_up(dev); | |
2078 | break; | |
2079 | case NETDEV_DOWN: | |
2080 | dn_dev_down(dev); | |
2081 | break; | |
2082 | default: | |
2083 | break; | |
2084 | } | |
2085 | ||
2086 | return NOTIFY_DONE; | |
2087 | } | |
2088 | ||
2089 | static struct notifier_block dn_dev_notifier = { | |
2090 | .notifier_call = dn_device_event, | |
2091 | }; | |
2092 | ||
f2ccd8fa | 2093 | extern int dn_route_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); |
1da177e4 LT |
2094 | |
2095 | static struct packet_type dn_dix_packet_type = { | |
2096 | .type = __constant_htons(ETH_P_DNA_RT), | |
2097 | .dev = NULL, /* All devices */ | |
2098 | .func = dn_route_rcv, | |
2099 | }; | |
2100 | ||
2101 | #ifdef CONFIG_PROC_FS | |
2102 | struct dn_iter_state { | |
2103 | int bucket; | |
2104 | }; | |
2105 | ||
2106 | static struct sock *dn_socket_get_first(struct seq_file *seq) | |
2107 | { | |
2108 | struct dn_iter_state *state = seq->private; | |
2109 | struct sock *n = NULL; | |
2110 | ||
2111 | for(state->bucket = 0; | |
2112 | state->bucket < DN_SK_HASH_SIZE; | |
2113 | ++state->bucket) { | |
2114 | n = sk_head(&dn_sk_hash[state->bucket]); | |
2115 | if (n) | |
2116 | break; | |
2117 | } | |
2118 | ||
2119 | return n; | |
2120 | } | |
2121 | ||
2122 | static struct sock *dn_socket_get_next(struct seq_file *seq, | |
2123 | struct sock *n) | |
2124 | { | |
2125 | struct dn_iter_state *state = seq->private; | |
2126 | ||
2127 | n = sk_next(n); | |
2128 | try_again: | |
2129 | if (n) | |
2130 | goto out; | |
2131 | if (++state->bucket >= DN_SK_HASH_SIZE) | |
2132 | goto out; | |
2133 | n = sk_head(&dn_sk_hash[state->bucket]); | |
2134 | goto try_again; | |
2135 | out: | |
2136 | return n; | |
2137 | } | |
2138 | ||
2139 | static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos) | |
2140 | { | |
2141 | struct sock *sk = dn_socket_get_first(seq); | |
2142 | ||
2143 | if (sk) { | |
2144 | while(*pos && (sk = dn_socket_get_next(seq, sk))) | |
2145 | --*pos; | |
2146 | } | |
2147 | return *pos ? NULL : sk; | |
2148 | } | |
2149 | ||
2150 | static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos) | |
2151 | { | |
2152 | void *rc; | |
2153 | read_lock_bh(&dn_hash_lock); | |
2154 | rc = socket_get_idx(seq, &pos); | |
2155 | if (!rc) { | |
2156 | read_unlock_bh(&dn_hash_lock); | |
2157 | } | |
2158 | return rc; | |
2159 | } | |
2160 | ||
2161 | static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos) | |
2162 | { | |
2163 | return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2164 | } | |
2165 | ||
2166 | static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2167 | { | |
2168 | void *rc; | |
2169 | ||
2170 | if (v == SEQ_START_TOKEN) { | |
2171 | rc = dn_socket_get_idx(seq, 0); | |
2172 | goto out; | |
2173 | } | |
2174 | ||
2175 | rc = dn_socket_get_next(seq, v); | |
2176 | if (rc) | |
2177 | goto out; | |
2178 | read_unlock_bh(&dn_hash_lock); | |
2179 | out: | |
2180 | ++*pos; | |
2181 | return rc; | |
2182 | } | |
2183 | ||
2184 | static void dn_socket_seq_stop(struct seq_file *seq, void *v) | |
2185 | { | |
2186 | if (v && v != SEQ_START_TOKEN) | |
2187 | read_unlock_bh(&dn_hash_lock); | |
2188 | } | |
2189 | ||
2190 | #define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126) | |
2191 | ||
2192 | static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf) | |
2193 | { | |
2194 | int i; | |
2195 | ||
2196 | switch (dn_ntohs(dn->sdn_objnamel)) { | |
2197 | case 0: | |
2198 | sprintf(buf, "%d", dn->sdn_objnum); | |
2199 | break; | |
2200 | default: | |
2201 | for (i = 0; i < dn_ntohs(dn->sdn_objnamel); i++) { | |
2202 | buf[i] = dn->sdn_objname[i]; | |
2203 | if (IS_NOT_PRINTABLE(buf[i])) | |
2204 | buf[i] = '.'; | |
2205 | } | |
2206 | buf[i] = 0; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | static char *dn_state2asc(unsigned char state) | |
2211 | { | |
2212 | switch(state) { | |
2213 | case DN_O: | |
2214 | return "OPEN"; | |
2215 | case DN_CR: | |
2216 | return " CR"; | |
2217 | case DN_DR: | |
2218 | return " DR"; | |
2219 | case DN_DRC: | |
2220 | return " DRC"; | |
2221 | case DN_CC: | |
2222 | return " CC"; | |
2223 | case DN_CI: | |
2224 | return " CI"; | |
2225 | case DN_NR: | |
2226 | return " NR"; | |
2227 | case DN_NC: | |
2228 | return " NC"; | |
2229 | case DN_CD: | |
2230 | return " CD"; | |
2231 | case DN_RJ: | |
2232 | return " RJ"; | |
2233 | case DN_RUN: | |
2234 | return " RUN"; | |
2235 | case DN_DI: | |
2236 | return " DI"; | |
2237 | case DN_DIC: | |
2238 | return " DIC"; | |
2239 | case DN_DN: | |
2240 | return " DN"; | |
2241 | case DN_CL: | |
2242 | return " CL"; | |
2243 | case DN_CN: | |
2244 | return " CN"; | |
2245 | } | |
2246 | ||
2247 | return "????"; | |
2248 | } | |
2249 | ||
2250 | static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk) | |
2251 | { | |
2252 | struct dn_scp *scp = DN_SK(sk); | |
2253 | char buf1[DN_ASCBUF_LEN]; | |
2254 | char buf2[DN_ASCBUF_LEN]; | |
2255 | char local_object[DN_MAXOBJL+3]; | |
2256 | char remote_object[DN_MAXOBJL+3]; | |
2257 | ||
2258 | dn_printable_object(&scp->addr, local_object); | |
2259 | dn_printable_object(&scp->peer, remote_object); | |
2260 | ||
2261 | seq_printf(seq, | |
2262 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s " | |
2263 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n", | |
2264 | dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->addr)), buf1), | |
2265 | scp->addrloc, | |
2266 | scp->numdat, | |
2267 | scp->numoth, | |
2268 | scp->ackxmt_dat, | |
2269 | scp->ackxmt_oth, | |
2270 | scp->flowloc_sw, | |
2271 | local_object, | |
2272 | dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->peer)), buf2), | |
2273 | scp->addrrem, | |
2274 | scp->numdat_rcv, | |
2275 | scp->numoth_rcv, | |
2276 | scp->ackrcv_dat, | |
2277 | scp->ackrcv_oth, | |
2278 | scp->flowrem_sw, | |
2279 | remote_object, | |
2280 | dn_state2asc(scp->state), | |
2281 | ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER")); | |
2282 | } | |
2283 | ||
2284 | static int dn_socket_seq_show(struct seq_file *seq, void *v) | |
2285 | { | |
2286 | if (v == SEQ_START_TOKEN) { | |
2287 | seq_puts(seq, "Local Remote\n"); | |
2288 | } else { | |
2289 | dn_socket_format_entry(seq, v); | |
2290 | } | |
2291 | return 0; | |
2292 | } | |
2293 | ||
2294 | static struct seq_operations dn_socket_seq_ops = { | |
2295 | .start = dn_socket_seq_start, | |
2296 | .next = dn_socket_seq_next, | |
2297 | .stop = dn_socket_seq_stop, | |
2298 | .show = dn_socket_seq_show, | |
2299 | }; | |
2300 | ||
2301 | static int dn_socket_seq_open(struct inode *inode, struct file *file) | |
2302 | { | |
2303 | struct seq_file *seq; | |
2304 | int rc = -ENOMEM; | |
2305 | struct dn_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
2306 | ||
2307 | if (!s) | |
2308 | goto out; | |
2309 | ||
2310 | rc = seq_open(file, &dn_socket_seq_ops); | |
2311 | if (rc) | |
2312 | goto out_kfree; | |
2313 | ||
2314 | seq = file->private_data; | |
2315 | seq->private = s; | |
2316 | memset(s, 0, sizeof(*s)); | |
2317 | out: | |
2318 | return rc; | |
2319 | out_kfree: | |
2320 | kfree(s); | |
2321 | goto out; | |
2322 | } | |
2323 | ||
2324 | static struct file_operations dn_socket_seq_fops = { | |
2325 | .owner = THIS_MODULE, | |
2326 | .open = dn_socket_seq_open, | |
2327 | .read = seq_read, | |
2328 | .llseek = seq_lseek, | |
2329 | .release = seq_release_private, | |
2330 | }; | |
2331 | #endif | |
2332 | ||
2333 | static struct net_proto_family dn_family_ops = { | |
2334 | .family = AF_DECnet, | |
2335 | .create = dn_create, | |
2336 | .owner = THIS_MODULE, | |
2337 | }; | |
2338 | ||
2339 | static struct proto_ops dn_proto_ops = { | |
2340 | .family = AF_DECnet, | |
2341 | .owner = THIS_MODULE, | |
2342 | .release = dn_release, | |
2343 | .bind = dn_bind, | |
2344 | .connect = dn_connect, | |
2345 | .socketpair = sock_no_socketpair, | |
2346 | .accept = dn_accept, | |
2347 | .getname = dn_getname, | |
2348 | .poll = dn_poll, | |
2349 | .ioctl = dn_ioctl, | |
2350 | .listen = dn_listen, | |
2351 | .shutdown = dn_shutdown, | |
2352 | .setsockopt = dn_setsockopt, | |
2353 | .getsockopt = dn_getsockopt, | |
2354 | .sendmsg = dn_sendmsg, | |
2355 | .recvmsg = dn_recvmsg, | |
2356 | .mmap = sock_no_mmap, | |
2357 | .sendpage = sock_no_sendpage, | |
2358 | }; | |
2359 | ||
2360 | void dn_register_sysctl(void); | |
2361 | void dn_unregister_sysctl(void); | |
2362 | ||
2363 | MODULE_DESCRIPTION("The Linux DECnet Network Protocol"); | |
2364 | MODULE_AUTHOR("Linux DECnet Project Team"); | |
2365 | MODULE_LICENSE("GPL"); | |
2366 | MODULE_ALIAS_NETPROTO(PF_DECnet); | |
2367 | ||
2368 | static char banner[] __initdata = KERN_INFO "NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n"; | |
2369 | ||
2370 | static int __init decnet_init(void) | |
2371 | { | |
2372 | int rc; | |
2373 | ||
2374 | printk(banner); | |
2375 | ||
2376 | rc = proto_register(&dn_proto, 1); | |
2377 | if (rc != 0) | |
2378 | goto out; | |
2379 | ||
2380 | dn_neigh_init(); | |
2381 | dn_dev_init(); | |
2382 | dn_route_init(); | |
2383 | dn_fib_init(); | |
2384 | ||
2385 | sock_register(&dn_family_ops); | |
2386 | dev_add_pack(&dn_dix_packet_type); | |
2387 | register_netdevice_notifier(&dn_dev_notifier); | |
2388 | ||
2389 | proc_net_fops_create("decnet", S_IRUGO, &dn_socket_seq_fops); | |
2390 | dn_register_sysctl(); | |
2391 | out: | |
2392 | return rc; | |
2393 | ||
2394 | } | |
2395 | module_init(decnet_init); | |
2396 | ||
2397 | /* | |
2398 | * Prevent DECnet module unloading until its fixed properly. | |
2399 | * Requires an audit of the code to check for memory leaks and | |
2400 | * initialisation problems etc. | |
2401 | */ | |
2402 | #if 0 | |
2403 | static void __exit decnet_exit(void) | |
2404 | { | |
2405 | sock_unregister(AF_DECnet); | |
2406 | dev_remove_pack(&dn_dix_packet_type); | |
2407 | ||
2408 | dn_unregister_sysctl(); | |
2409 | ||
2410 | unregister_netdevice_notifier(&dn_dev_notifier); | |
2411 | ||
2412 | dn_route_cleanup(); | |
2413 | dn_dev_cleanup(); | |
2414 | dn_neigh_cleanup(); | |
2415 | dn_fib_cleanup(); | |
2416 | ||
2417 | proc_net_remove("decnet"); | |
2418 | ||
2419 | proto_unregister(&dn_proto); | |
2420 | } | |
2421 | module_exit(decnet_exit); | |
2422 | #endif |