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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 | ||
1da177e4 LT |
102 | #include <linux/module.h> |
103 | #include <linux/errno.h> | |
104 | #include <linux/types.h> | |
105 | #include <linux/slab.h> | |
106 | #include <linux/socket.h> | |
107 | #include <linux/in.h> | |
108 | #include <linux/kernel.h> | |
109 | #include <linux/sched.h> | |
110 | #include <linux/timer.h> | |
111 | #include <linux/string.h> | |
112 | #include <linux/sockios.h> | |
113 | #include <linux/net.h> | |
114 | #include <linux/netdevice.h> | |
115 | #include <linux/inet.h> | |
116 | #include <linux/route.h> | |
117 | #include <linux/netfilter.h> | |
118 | #include <linux/seq_file.h> | |
119 | #include <net/sock.h> | |
c752f073 | 120 | #include <net/tcp_states.h> |
1da177e4 LT |
121 | #include <net/flow.h> |
122 | #include <asm/system.h> | |
123 | #include <asm/ioctls.h> | |
4fc268d2 | 124 | #include <linux/capability.h> |
1da177e4 LT |
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 | ||
90ddc4f0 | 152 | static const struct proto_ops dn_proto_ops; |
1da177e4 LT |
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; | |
1f12bcc9 | 156 | static atomic_t decnet_memory_allocated; |
1da177e4 LT |
157 | |
158 | static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen, int flags); | |
159 | static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags); | |
160 | ||
161 | static struct hlist_head *dn_find_list(struct sock *sk) | |
162 | { | |
163 | struct dn_scp *scp = DN_SK(sk); | |
164 | ||
165 | if (scp->addr.sdn_flags & SDF_WILD) | |
166 | return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL; | |
167 | ||
168 | return &dn_sk_hash[scp->addrloc & DN_SK_HASH_MASK]; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Valid ports are those greater than zero and not already in use. | |
173 | */ | |
c4ea94ab | 174 | static int check_port(__le16 port) |
1da177e4 LT |
175 | { |
176 | struct sock *sk; | |
177 | struct hlist_node *node; | |
178 | ||
179 | if (port == 0) | |
180 | return -1; | |
181 | ||
182 | sk_for_each(sk, node, &dn_sk_hash[port & DN_SK_HASH_MASK]) { | |
183 | struct dn_scp *scp = DN_SK(sk); | |
184 | if (scp->addrloc == port) | |
185 | return -1; | |
186 | } | |
187 | return 0; | |
188 | } | |
189 | ||
190 | static unsigned short port_alloc(struct sock *sk) | |
191 | { | |
192 | struct dn_scp *scp = DN_SK(sk); | |
193 | static unsigned short port = 0x2000; | |
194 | unsigned short i_port = port; | |
195 | ||
196 | while(check_port(++port) != 0) { | |
197 | if (port == i_port) | |
198 | return 0; | |
199 | } | |
200 | ||
201 | scp->addrloc = port; | |
202 | ||
203 | return 1; | |
204 | } | |
205 | ||
206 | /* | |
207 | * Since this is only ever called from user | |
208 | * level, we don't need a write_lock() version | |
209 | * of this. | |
210 | */ | |
211 | static int dn_hash_sock(struct sock *sk) | |
212 | { | |
213 | struct dn_scp *scp = DN_SK(sk); | |
214 | struct hlist_head *list; | |
215 | int rv = -EUSERS; | |
216 | ||
217 | BUG_ON(sk_hashed(sk)); | |
218 | ||
219 | write_lock_bh(&dn_hash_lock); | |
220 | ||
221 | if (!scp->addrloc && !port_alloc(sk)) | |
222 | goto out; | |
223 | ||
224 | rv = -EADDRINUSE; | |
225 | if ((list = dn_find_list(sk)) == NULL) | |
226 | goto out; | |
227 | ||
228 | sk_add_node(sk, list); | |
229 | rv = 0; | |
230 | out: | |
231 | write_unlock_bh(&dn_hash_lock); | |
232 | return rv; | |
233 | } | |
234 | ||
235 | static void dn_unhash_sock(struct sock *sk) | |
236 | { | |
237 | write_lock(&dn_hash_lock); | |
238 | sk_del_node_init(sk); | |
239 | write_unlock(&dn_hash_lock); | |
240 | } | |
241 | ||
242 | static void dn_unhash_sock_bh(struct sock *sk) | |
243 | { | |
244 | write_lock_bh(&dn_hash_lock); | |
245 | sk_del_node_init(sk); | |
246 | write_unlock_bh(&dn_hash_lock); | |
247 | } | |
248 | ||
249 | static struct hlist_head *listen_hash(struct sockaddr_dn *addr) | |
250 | { | |
251 | int i; | |
252 | unsigned hash = addr->sdn_objnum; | |
253 | ||
254 | if (hash == 0) { | |
255 | hash = addr->sdn_objnamel; | |
256 | for(i = 0; i < dn_ntohs(addr->sdn_objnamel); i++) { | |
257 | hash ^= addr->sdn_objname[i]; | |
258 | hash ^= (hash << 3); | |
259 | } | |
260 | } | |
261 | ||
262 | return &dn_sk_hash[hash & DN_SK_HASH_MASK]; | |
263 | } | |
264 | ||
265 | /* | |
266 | * Called to transform a socket from bound (i.e. with a local address) | |
267 | * into a listening socket (doesn't need a local port number) and rehashes | |
268 | * based upon the object name/number. | |
269 | */ | |
270 | static void dn_rehash_sock(struct sock *sk) | |
271 | { | |
272 | struct hlist_head *list; | |
273 | struct dn_scp *scp = DN_SK(sk); | |
274 | ||
275 | if (scp->addr.sdn_flags & SDF_WILD) | |
276 | return; | |
277 | ||
278 | write_lock_bh(&dn_hash_lock); | |
279 | sk_del_node_init(sk); | |
280 | DN_SK(sk)->addrloc = 0; | |
281 | list = listen_hash(&DN_SK(sk)->addr); | |
282 | sk_add_node(sk, list); | |
283 | write_unlock_bh(&dn_hash_lock); | |
284 | } | |
285 | ||
286 | int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type) | |
287 | { | |
288 | int len = 2; | |
289 | ||
290 | *buf++ = type; | |
291 | ||
292 | switch(type) { | |
293 | case 0: | |
294 | *buf++ = sdn->sdn_objnum; | |
295 | break; | |
296 | case 1: | |
297 | *buf++ = 0; | |
298 | *buf++ = dn_ntohs(sdn->sdn_objnamel); | |
299 | memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel)); | |
300 | len = 3 + dn_ntohs(sdn->sdn_objnamel); | |
301 | break; | |
302 | case 2: | |
303 | memset(buf, 0, 5); | |
304 | buf += 5; | |
305 | *buf++ = dn_ntohs(sdn->sdn_objnamel); | |
306 | memcpy(buf, sdn->sdn_objname, dn_ntohs(sdn->sdn_objnamel)); | |
307 | len = 7 + dn_ntohs(sdn->sdn_objnamel); | |
308 | break; | |
309 | } | |
310 | ||
311 | return len; | |
312 | } | |
313 | ||
314 | /* | |
315 | * On reception of usernames, we handle types 1 and 0 for destination | |
316 | * addresses only. Types 2 and 4 are used for source addresses, but the | |
317 | * UIC, GIC are ignored and they are both treated the same way. Type 3 | |
318 | * is never used as I've no idea what its purpose might be or what its | |
319 | * format is. | |
320 | */ | |
321 | int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt) | |
322 | { | |
323 | unsigned char type; | |
324 | int size = len; | |
325 | int namel = 12; | |
326 | ||
327 | sdn->sdn_objnum = 0; | |
328 | sdn->sdn_objnamel = dn_htons(0); | |
329 | memset(sdn->sdn_objname, 0, DN_MAXOBJL); | |
330 | ||
331 | if (len < 2) | |
332 | return -1; | |
333 | ||
334 | len -= 2; | |
335 | *fmt = *data++; | |
336 | type = *data++; | |
337 | ||
338 | switch(*fmt) { | |
339 | case 0: | |
340 | sdn->sdn_objnum = type; | |
341 | return 2; | |
342 | case 1: | |
343 | namel = 16; | |
344 | break; | |
345 | case 2: | |
346 | len -= 4; | |
347 | data += 4; | |
348 | break; | |
349 | case 4: | |
350 | len -= 8; | |
351 | data += 8; | |
352 | break; | |
353 | default: | |
354 | return -1; | |
355 | } | |
356 | ||
357 | len -= 1; | |
358 | ||
359 | if (len < 0) | |
360 | return -1; | |
361 | ||
362 | sdn->sdn_objnamel = dn_htons(*data++); | |
363 | len -= dn_ntohs(sdn->sdn_objnamel); | |
364 | ||
365 | if ((len < 0) || (dn_ntohs(sdn->sdn_objnamel) > namel)) | |
366 | return -1; | |
367 | ||
368 | memcpy(sdn->sdn_objname, data, dn_ntohs(sdn->sdn_objnamel)); | |
369 | ||
370 | return size - len; | |
371 | } | |
372 | ||
373 | struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr) | |
374 | { | |
375 | struct hlist_head *list = listen_hash(addr); | |
376 | struct hlist_node *node; | |
377 | struct sock *sk; | |
378 | ||
379 | read_lock(&dn_hash_lock); | |
380 | sk_for_each(sk, node, list) { | |
381 | struct dn_scp *scp = DN_SK(sk); | |
382 | if (sk->sk_state != TCP_LISTEN) | |
383 | continue; | |
384 | if (scp->addr.sdn_objnum) { | |
385 | if (scp->addr.sdn_objnum != addr->sdn_objnum) | |
386 | continue; | |
387 | } else { | |
388 | if (addr->sdn_objnum) | |
389 | continue; | |
390 | if (scp->addr.sdn_objnamel != addr->sdn_objnamel) | |
391 | continue; | |
392 | if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, dn_ntohs(addr->sdn_objnamel)) != 0) | |
393 | continue; | |
394 | } | |
395 | sock_hold(sk); | |
396 | read_unlock(&dn_hash_lock); | |
397 | return sk; | |
398 | } | |
399 | ||
400 | sk = sk_head(&dn_wild_sk); | |
401 | if (sk) { | |
402 | if (sk->sk_state == TCP_LISTEN) | |
403 | sock_hold(sk); | |
404 | else | |
405 | sk = NULL; | |
406 | } | |
407 | ||
408 | read_unlock(&dn_hash_lock); | |
409 | return sk; | |
410 | } | |
411 | ||
412 | struct sock *dn_find_by_skb(struct sk_buff *skb) | |
413 | { | |
414 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
415 | struct sock *sk; | |
416 | struct hlist_node *node; | |
417 | struct dn_scp *scp; | |
418 | ||
419 | read_lock(&dn_hash_lock); | |
420 | sk_for_each(sk, node, &dn_sk_hash[cb->dst_port & DN_SK_HASH_MASK]) { | |
421 | scp = DN_SK(sk); | |
422 | if (cb->src != dn_saddr2dn(&scp->peer)) | |
423 | continue; | |
424 | if (cb->dst_port != scp->addrloc) | |
425 | continue; | |
426 | if (scp->addrrem && (cb->src_port != scp->addrrem)) | |
427 | continue; | |
428 | sock_hold(sk); | |
429 | goto found; | |
430 | } | |
431 | sk = NULL; | |
432 | found: | |
433 | read_unlock(&dn_hash_lock); | |
434 | return sk; | |
435 | } | |
436 | ||
437 | ||
438 | ||
439 | static void dn_destruct(struct sock *sk) | |
440 | { | |
441 | struct dn_scp *scp = DN_SK(sk); | |
442 | ||
443 | skb_queue_purge(&scp->data_xmit_queue); | |
444 | skb_queue_purge(&scp->other_xmit_queue); | |
445 | skb_queue_purge(&scp->other_receive_queue); | |
446 | ||
447 | dst_release(xchg(&sk->sk_dst_cache, NULL)); | |
448 | } | |
449 | ||
1f12bcc9 SW |
450 | static int dn_memory_pressure; |
451 | ||
452 | static void dn_enter_memory_pressure(void) | |
453 | { | |
454 | if (!dn_memory_pressure) { | |
455 | dn_memory_pressure = 1; | |
456 | } | |
457 | } | |
458 | ||
1da177e4 | 459 | static struct proto dn_proto = { |
1f12bcc9 SW |
460 | .name = "NSP", |
461 | .owner = THIS_MODULE, | |
462 | .enter_memory_pressure = dn_enter_memory_pressure, | |
463 | .memory_pressure = &dn_memory_pressure, | |
464 | .memory_allocated = &decnet_memory_allocated, | |
465 | .sysctl_mem = sysctl_decnet_mem, | |
466 | .sysctl_wmem = sysctl_decnet_wmem, | |
467 | .sysctl_rmem = sysctl_decnet_rmem, | |
468 | .max_header = DN_MAX_NSP_DATA_HEADER + 64, | |
469 | .obj_size = sizeof(struct dn_sock), | |
1da177e4 LT |
470 | }; |
471 | ||
dd0fc66f | 472 | static struct sock *dn_alloc_sock(struct socket *sock, gfp_t gfp) |
1da177e4 LT |
473 | { |
474 | struct dn_scp *scp; | |
475 | struct sock *sk = sk_alloc(PF_DECnet, gfp, &dn_proto, 1); | |
476 | ||
477 | if (!sk) | |
478 | goto out; | |
479 | ||
480 | if (sock) | |
481 | sock->ops = &dn_proto_ops; | |
482 | sock_init_data(sock, sk); | |
483 | ||
484 | sk->sk_backlog_rcv = dn_nsp_backlog_rcv; | |
485 | sk->sk_destruct = dn_destruct; | |
486 | sk->sk_no_check = 1; | |
487 | sk->sk_family = PF_DECnet; | |
488 | sk->sk_protocol = 0; | |
489 | sk->sk_allocation = gfp; | |
1f12bcc9 SW |
490 | sk->sk_sndbuf = sysctl_decnet_wmem[1]; |
491 | sk->sk_rcvbuf = sysctl_decnet_rmem[1]; | |
1da177e4 LT |
492 | |
493 | /* Initialization of DECnet Session Control Port */ | |
494 | scp = DN_SK(sk); | |
495 | scp->state = DN_O; /* Open */ | |
496 | scp->numdat = 1; /* Next data seg to tx */ | |
497 | scp->numoth = 1; /* Next oth data to tx */ | |
498 | scp->ackxmt_dat = 0; /* Last data seg ack'ed */ | |
499 | scp->ackxmt_oth = 0; /* Last oth data ack'ed */ | |
500 | scp->ackrcv_dat = 0; /* Highest data ack recv*/ | |
501 | scp->ackrcv_oth = 0; /* Last oth data ack rec*/ | |
502 | scp->flowrem_sw = DN_SEND; | |
503 | scp->flowloc_sw = DN_SEND; | |
504 | scp->flowrem_dat = 0; | |
505 | scp->flowrem_oth = 1; | |
506 | scp->flowloc_dat = 0; | |
507 | scp->flowloc_oth = 1; | |
508 | scp->services_rem = 0; | |
509 | scp->services_loc = 1 | NSP_FC_NONE; | |
510 | scp->info_rem = 0; | |
511 | scp->info_loc = 0x03; /* NSP version 4.1 */ | |
512 | scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */ | |
513 | scp->nonagle = 0; | |
514 | scp->multi_ireq = 1; | |
515 | scp->accept_mode = ACC_IMMED; | |
516 | scp->addr.sdn_family = AF_DECnet; | |
517 | scp->peer.sdn_family = AF_DECnet; | |
518 | scp->accessdata.acc_accl = 5; | |
519 | memcpy(scp->accessdata.acc_acc, "LINUX", 5); | |
520 | ||
521 | scp->max_window = NSP_MAX_WINDOW; | |
522 | scp->snd_window = NSP_MIN_WINDOW; | |
523 | scp->nsp_srtt = NSP_INITIAL_SRTT; | |
524 | scp->nsp_rttvar = NSP_INITIAL_RTTVAR; | |
525 | scp->nsp_rxtshift = 0; | |
526 | ||
527 | skb_queue_head_init(&scp->data_xmit_queue); | |
528 | skb_queue_head_init(&scp->other_xmit_queue); | |
529 | skb_queue_head_init(&scp->other_receive_queue); | |
530 | ||
531 | scp->persist = 0; | |
532 | scp->persist_fxn = NULL; | |
533 | scp->keepalive = 10 * HZ; | |
534 | scp->keepalive_fxn = dn_keepalive; | |
535 | ||
536 | init_timer(&scp->delack_timer); | |
537 | scp->delack_pending = 0; | |
538 | scp->delack_fxn = dn_nsp_delayed_ack; | |
539 | ||
540 | dn_start_slow_timer(sk); | |
541 | out: | |
542 | return sk; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Keepalive timer. | |
547 | * FIXME: Should respond to SO_KEEPALIVE etc. | |
548 | */ | |
549 | static void dn_keepalive(struct sock *sk) | |
550 | { | |
551 | struct dn_scp *scp = DN_SK(sk); | |
552 | ||
553 | /* | |
554 | * By checking the other_data transmit queue is empty | |
555 | * we are double checking that we are not sending too | |
556 | * many of these keepalive frames. | |
557 | */ | |
b03efcfb | 558 | if (skb_queue_empty(&scp->other_xmit_queue)) |
1da177e4 LT |
559 | dn_nsp_send_link(sk, DN_NOCHANGE, 0); |
560 | } | |
561 | ||
562 | ||
563 | /* | |
564 | * Timer for shutdown/destroyed sockets. | |
565 | * When socket is dead & no packets have been sent for a | |
566 | * certain amount of time, they are removed by this | |
567 | * routine. Also takes care of sending out DI & DC | |
568 | * frames at correct times. | |
569 | */ | |
570 | int dn_destroy_timer(struct sock *sk) | |
571 | { | |
572 | struct dn_scp *scp = DN_SK(sk); | |
573 | ||
574 | scp->persist = dn_nsp_persist(sk); | |
575 | ||
576 | switch(scp->state) { | |
577 | case DN_DI: | |
578 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC); | |
579 | if (scp->nsp_rxtshift >= decnet_di_count) | |
580 | scp->state = DN_CN; | |
581 | return 0; | |
582 | ||
583 | case DN_DR: | |
584 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC); | |
585 | if (scp->nsp_rxtshift >= decnet_dr_count) | |
586 | scp->state = DN_DRC; | |
587 | return 0; | |
588 | ||
589 | case DN_DN: | |
590 | if (scp->nsp_rxtshift < decnet_dn_count) { | |
591 | /* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */ | |
592 | dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC); | |
593 | return 0; | |
594 | } | |
595 | } | |
596 | ||
597 | scp->persist = (HZ * decnet_time_wait); | |
598 | ||
599 | if (sk->sk_socket) | |
600 | return 0; | |
601 | ||
602 | if ((jiffies - scp->stamp) >= (HZ * decnet_time_wait)) { | |
603 | dn_unhash_sock(sk); | |
604 | sock_put(sk); | |
605 | return 1; | |
606 | } | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | static void dn_destroy_sock(struct sock *sk) | |
612 | { | |
613 | struct dn_scp *scp = DN_SK(sk); | |
614 | ||
615 | scp->nsp_rxtshift = 0; /* reset back off */ | |
616 | ||
617 | if (sk->sk_socket) { | |
618 | if (sk->sk_socket->state != SS_UNCONNECTED) | |
619 | sk->sk_socket->state = SS_DISCONNECTING; | |
620 | } | |
621 | ||
622 | sk->sk_state = TCP_CLOSE; | |
623 | ||
624 | switch(scp->state) { | |
625 | case DN_DN: | |
626 | dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, | |
627 | sk->sk_allocation); | |
628 | scp->persist_fxn = dn_destroy_timer; | |
629 | scp->persist = dn_nsp_persist(sk); | |
630 | break; | |
631 | case DN_CR: | |
632 | scp->state = DN_DR; | |
633 | goto disc_reject; | |
634 | case DN_RUN: | |
635 | scp->state = DN_DI; | |
636 | case DN_DI: | |
637 | case DN_DR: | |
638 | disc_reject: | |
639 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation); | |
640 | case DN_NC: | |
641 | case DN_NR: | |
642 | case DN_RJ: | |
643 | case DN_DIC: | |
644 | case DN_CN: | |
645 | case DN_DRC: | |
646 | case DN_CI: | |
647 | case DN_CD: | |
648 | scp->persist_fxn = dn_destroy_timer; | |
649 | scp->persist = dn_nsp_persist(sk); | |
650 | break; | |
651 | default: | |
652 | printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n"); | |
653 | case DN_O: | |
654 | dn_stop_slow_timer(sk); | |
655 | ||
656 | dn_unhash_sock_bh(sk); | |
657 | sock_put(sk); | |
658 | ||
659 | break; | |
660 | } | |
661 | } | |
662 | ||
c4ea94ab | 663 | char *dn_addr2asc(__u16 addr, char *buf) |
1da177e4 LT |
664 | { |
665 | unsigned short node, area; | |
666 | ||
667 | node = addr & 0x03ff; | |
668 | area = addr >> 10; | |
669 | sprintf(buf, "%hd.%hd", area, node); | |
670 | ||
671 | return buf; | |
672 | } | |
673 | ||
674 | ||
675 | ||
676 | static int dn_create(struct socket *sock, int protocol) | |
677 | { | |
678 | struct sock *sk; | |
679 | ||
680 | switch(sock->type) { | |
681 | case SOCK_SEQPACKET: | |
682 | if (protocol != DNPROTO_NSP) | |
683 | return -EPROTONOSUPPORT; | |
684 | break; | |
685 | case SOCK_STREAM: | |
686 | break; | |
687 | default: | |
688 | return -ESOCKTNOSUPPORT; | |
689 | } | |
690 | ||
691 | ||
692 | if ((sk = dn_alloc_sock(sock, GFP_KERNEL)) == NULL) | |
693 | return -ENOBUFS; | |
694 | ||
695 | sk->sk_protocol = protocol; | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | ||
701 | static int | |
702 | dn_release(struct socket *sock) | |
703 | { | |
704 | struct sock *sk = sock->sk; | |
705 | ||
706 | if (sk) { | |
707 | sock_orphan(sk); | |
708 | sock_hold(sk); | |
709 | lock_sock(sk); | |
710 | dn_destroy_sock(sk); | |
711 | release_sock(sk); | |
712 | sock_put(sk); | |
713 | } | |
714 | ||
715 | return 0; | |
716 | } | |
717 | ||
718 | static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
719 | { | |
720 | struct sock *sk = sock->sk; | |
721 | struct dn_scp *scp = DN_SK(sk); | |
722 | struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr; | |
723 | struct net_device *dev; | |
724 | int rv; | |
725 | ||
726 | if (addr_len != sizeof(struct sockaddr_dn)) | |
727 | return -EINVAL; | |
728 | ||
729 | if (saddr->sdn_family != AF_DECnet) | |
730 | return -EINVAL; | |
731 | ||
732 | if (dn_ntohs(saddr->sdn_nodeaddrl) && (dn_ntohs(saddr->sdn_nodeaddrl) != 2)) | |
733 | return -EINVAL; | |
734 | ||
735 | if (dn_ntohs(saddr->sdn_objnamel) > DN_MAXOBJL) | |
736 | return -EINVAL; | |
737 | ||
738 | if (saddr->sdn_flags & ~SDF_WILD) | |
739 | return -EINVAL; | |
740 | ||
1da177e4 LT |
741 | if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum || |
742 | (saddr->sdn_flags & SDF_WILD))) | |
743 | return -EACCES; | |
1da177e4 LT |
744 | |
745 | if (!(saddr->sdn_flags & SDF_WILD)) { | |
746 | if (dn_ntohs(saddr->sdn_nodeaddrl)) { | |
747 | read_lock(&dev_base_lock); | |
748 | for(dev = dev_base; dev; dev = dev->next) { | |
749 | if (!dev->dn_ptr) | |
750 | continue; | |
751 | if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) | |
752 | break; | |
753 | } | |
754 | read_unlock(&dev_base_lock); | |
755 | if (dev == NULL) | |
756 | return -EADDRNOTAVAIL; | |
757 | } | |
758 | } | |
759 | ||
760 | rv = -EINVAL; | |
761 | lock_sock(sk); | |
762 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
763 | memcpy(&scp->addr, saddr, addr_len); | |
764 | sock_reset_flag(sk, SOCK_ZAPPED); | |
765 | ||
766 | rv = dn_hash_sock(sk); | |
767 | if (rv) | |
768 | sock_set_flag(sk, SOCK_ZAPPED); | |
769 | } | |
770 | release_sock(sk); | |
771 | ||
772 | return rv; | |
773 | } | |
774 | ||
775 | ||
776 | static int dn_auto_bind(struct socket *sock) | |
777 | { | |
778 | struct sock *sk = sock->sk; | |
779 | struct dn_scp *scp = DN_SK(sk); | |
780 | int rv; | |
781 | ||
782 | sock_reset_flag(sk, SOCK_ZAPPED); | |
783 | ||
784 | scp->addr.sdn_flags = 0; | |
785 | scp->addr.sdn_objnum = 0; | |
786 | ||
787 | /* | |
788 | * This stuff is to keep compatibility with Eduardo's | |
789 | * patch. I hope I can dispense with it shortly... | |
790 | */ | |
791 | if ((scp->accessdata.acc_accl != 0) && | |
792 | (scp->accessdata.acc_accl <= 12)) { | |
793 | ||
794 | scp->addr.sdn_objnamel = dn_htons(scp->accessdata.acc_accl); | |
795 | memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, dn_ntohs(scp->addr.sdn_objnamel)); | |
796 | ||
797 | scp->accessdata.acc_accl = 0; | |
798 | memset(scp->accessdata.acc_acc, 0, 40); | |
799 | } | |
800 | /* End of compatibility stuff */ | |
801 | ||
802 | scp->addr.sdn_add.a_len = dn_htons(2); | |
c4ea94ab | 803 | rv = dn_dev_bind_default((__le16 *)scp->addr.sdn_add.a_addr); |
1da177e4 LT |
804 | if (rv == 0) { |
805 | rv = dn_hash_sock(sk); | |
806 | if (rv) | |
807 | sock_set_flag(sk, SOCK_ZAPPED); | |
808 | } | |
809 | ||
810 | return rv; | |
811 | } | |
812 | ||
dd0fc66f | 813 | static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation) |
1da177e4 LT |
814 | { |
815 | struct dn_scp *scp = DN_SK(sk); | |
816 | DEFINE_WAIT(wait); | |
817 | int err; | |
818 | ||
819 | if (scp->state != DN_CR) | |
820 | return -EINVAL; | |
821 | ||
822 | scp->state = DN_CC; | |
823 | scp->segsize_loc = dst_metric(__sk_dst_get(sk), RTAX_ADVMSS); | |
824 | dn_send_conn_conf(sk, allocation); | |
825 | ||
826 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
827 | for(;;) { | |
828 | release_sock(sk); | |
829 | if (scp->state == DN_CC) | |
830 | *timeo = schedule_timeout(*timeo); | |
831 | lock_sock(sk); | |
832 | err = 0; | |
833 | if (scp->state == DN_RUN) | |
834 | break; | |
835 | err = sock_error(sk); | |
836 | if (err) | |
837 | break; | |
838 | err = sock_intr_errno(*timeo); | |
839 | if (signal_pending(current)) | |
840 | break; | |
841 | err = -EAGAIN; | |
842 | if (!*timeo) | |
843 | break; | |
844 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
845 | } | |
846 | finish_wait(sk->sk_sleep, &wait); | |
847 | if (err == 0) { | |
848 | sk->sk_socket->state = SS_CONNECTED; | |
849 | } else if (scp->state != DN_CC) { | |
850 | sk->sk_socket->state = SS_UNCONNECTED; | |
851 | } | |
852 | return err; | |
853 | } | |
854 | ||
855 | static int dn_wait_run(struct sock *sk, long *timeo) | |
856 | { | |
857 | struct dn_scp *scp = DN_SK(sk); | |
858 | DEFINE_WAIT(wait); | |
859 | int err = 0; | |
860 | ||
861 | if (scp->state == DN_RUN) | |
862 | goto out; | |
863 | ||
864 | if (!*timeo) | |
865 | return -EALREADY; | |
866 | ||
867 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
868 | for(;;) { | |
869 | release_sock(sk); | |
870 | if (scp->state == DN_CI || scp->state == DN_CC) | |
871 | *timeo = schedule_timeout(*timeo); | |
872 | lock_sock(sk); | |
873 | err = 0; | |
874 | if (scp->state == DN_RUN) | |
875 | break; | |
876 | err = sock_error(sk); | |
877 | if (err) | |
878 | break; | |
879 | err = sock_intr_errno(*timeo); | |
880 | if (signal_pending(current)) | |
881 | break; | |
882 | err = -ETIMEDOUT; | |
883 | if (!*timeo) | |
884 | break; | |
885 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
886 | } | |
887 | finish_wait(sk->sk_sleep, &wait); | |
888 | out: | |
889 | if (err == 0) { | |
890 | sk->sk_socket->state = SS_CONNECTED; | |
891 | } else if (scp->state != DN_CI && scp->state != DN_CC) { | |
892 | sk->sk_socket->state = SS_UNCONNECTED; | |
893 | } | |
894 | return err; | |
895 | } | |
896 | ||
897 | static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) | |
898 | { | |
899 | struct socket *sock = sk->sk_socket; | |
900 | struct dn_scp *scp = DN_SK(sk); | |
901 | int err = -EISCONN; | |
902 | struct flowi fl; | |
903 | ||
904 | if (sock->state == SS_CONNECTED) | |
905 | goto out; | |
906 | ||
907 | if (sock->state == SS_CONNECTING) { | |
908 | err = 0; | |
909 | if (scp->state == DN_RUN) { | |
910 | sock->state = SS_CONNECTED; | |
911 | goto out; | |
912 | } | |
913 | err = -ECONNREFUSED; | |
914 | if (scp->state != DN_CI && scp->state != DN_CC) { | |
915 | sock->state = SS_UNCONNECTED; | |
916 | goto out; | |
917 | } | |
918 | return dn_wait_run(sk, timeo); | |
919 | } | |
920 | ||
921 | err = -EINVAL; | |
922 | if (scp->state != DN_O) | |
923 | goto out; | |
924 | ||
925 | if (addr == NULL || addrlen != sizeof(struct sockaddr_dn)) | |
926 | goto out; | |
927 | if (addr->sdn_family != AF_DECnet) | |
928 | goto out; | |
929 | if (addr->sdn_flags & SDF_WILD) | |
930 | goto out; | |
931 | ||
932 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
933 | err = dn_auto_bind(sk->sk_socket); | |
934 | if (err) | |
935 | goto out; | |
936 | } | |
937 | ||
938 | memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn)); | |
939 | ||
940 | err = -EHOSTUNREACH; | |
941 | memset(&fl, 0, sizeof(fl)); | |
942 | fl.oif = sk->sk_bound_dev_if; | |
943 | fl.fld_dst = dn_saddr2dn(&scp->peer); | |
944 | fl.fld_src = dn_saddr2dn(&scp->addr); | |
945 | dn_sk_ports_copy(&fl, scp); | |
946 | fl.proto = DNPROTO_NSP; | |
947 | if (dn_route_output_sock(&sk->sk_dst_cache, &fl, sk, flags) < 0) | |
948 | goto out; | |
949 | sk->sk_route_caps = sk->sk_dst_cache->dev->features; | |
950 | sock->state = SS_CONNECTING; | |
951 | scp->state = DN_CI; | |
952 | scp->segsize_loc = dst_metric(sk->sk_dst_cache, RTAX_ADVMSS); | |
953 | ||
954 | dn_nsp_send_conninit(sk, NSP_CI); | |
955 | err = -EINPROGRESS; | |
956 | if (*timeo) { | |
957 | err = dn_wait_run(sk, timeo); | |
958 | } | |
959 | out: | |
960 | return err; | |
961 | } | |
962 | ||
963 | static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags) | |
964 | { | |
965 | struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr; | |
966 | struct sock *sk = sock->sk; | |
967 | int err; | |
968 | long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
969 | ||
970 | lock_sock(sk); | |
971 | err = __dn_connect(sk, addr, addrlen, &timeo, 0); | |
972 | release_sock(sk); | |
973 | ||
974 | return err; | |
975 | } | |
976 | ||
977 | static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) | |
978 | { | |
979 | struct dn_scp *scp = DN_SK(sk); | |
980 | ||
981 | switch(scp->state) { | |
982 | case DN_RUN: | |
983 | return 0; | |
984 | case DN_CR: | |
985 | return dn_confirm_accept(sk, timeo, sk->sk_allocation); | |
986 | case DN_CI: | |
987 | case DN_CC: | |
988 | return dn_wait_run(sk, timeo); | |
989 | case DN_O: | |
990 | return __dn_connect(sk, addr, addrlen, timeo, flags); | |
991 | } | |
992 | ||
993 | return -EINVAL; | |
994 | } | |
995 | ||
996 | ||
997 | static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc) | |
998 | { | |
999 | unsigned char *ptr = skb->data; | |
1000 | ||
1001 | acc->acc_userl = *ptr++; | |
1002 | memcpy(&acc->acc_user, ptr, acc->acc_userl); | |
1003 | ptr += acc->acc_userl; | |
1004 | ||
1005 | acc->acc_passl = *ptr++; | |
1006 | memcpy(&acc->acc_pass, ptr, acc->acc_passl); | |
1007 | ptr += acc->acc_passl; | |
1008 | ||
1009 | acc->acc_accl = *ptr++; | |
1010 | memcpy(&acc->acc_acc, ptr, acc->acc_accl); | |
1011 | ||
1012 | skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3); | |
1013 | ||
1014 | } | |
1015 | ||
1016 | static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt) | |
1017 | { | |
1018 | unsigned char *ptr = skb->data; | |
1019 | ||
1020 | opt->opt_optl = *ptr++; | |
1021 | opt->opt_status = 0; | |
1022 | memcpy(opt->opt_data, ptr, opt->opt_optl); | |
c4ea94ab | 1023 | skb_pull(skb, dn_ntohs(opt->opt_optl) + 1); |
1da177e4 LT |
1024 | |
1025 | } | |
1026 | ||
1027 | static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo) | |
1028 | { | |
1029 | DEFINE_WAIT(wait); | |
1030 | struct sk_buff *skb = NULL; | |
1031 | int err = 0; | |
1032 | ||
1033 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
1034 | for(;;) { | |
1035 | release_sock(sk); | |
1036 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1037 | if (skb == NULL) { | |
1038 | *timeo = schedule_timeout(*timeo); | |
1039 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1040 | } | |
1041 | lock_sock(sk); | |
1042 | if (skb != NULL) | |
1043 | break; | |
1044 | err = -EINVAL; | |
1045 | if (sk->sk_state != TCP_LISTEN) | |
1046 | break; | |
1047 | err = sock_intr_errno(*timeo); | |
1048 | if (signal_pending(current)) | |
1049 | break; | |
1050 | err = -EAGAIN; | |
1051 | if (!*timeo) | |
1052 | break; | |
1053 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
1054 | } | |
1055 | finish_wait(sk->sk_sleep, &wait); | |
1056 | ||
1057 | return skb == NULL ? ERR_PTR(err) : skb; | |
1058 | } | |
1059 | ||
1060 | static int dn_accept(struct socket *sock, struct socket *newsock, int flags) | |
1061 | { | |
1062 | struct sock *sk = sock->sk, *newsk; | |
1063 | struct sk_buff *skb = NULL; | |
1064 | struct dn_skb_cb *cb; | |
1065 | unsigned char menuver; | |
1066 | int err = 0; | |
1067 | unsigned char type; | |
1068 | long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
1069 | ||
1070 | lock_sock(sk); | |
1071 | ||
1072 | if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) { | |
1073 | release_sock(sk); | |
1074 | return -EINVAL; | |
1075 | } | |
1076 | ||
1077 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1078 | if (skb == NULL) { | |
1079 | skb = dn_wait_for_connect(sk, &timeo); | |
1080 | if (IS_ERR(skb)) { | |
1081 | release_sock(sk); | |
1082 | return PTR_ERR(skb); | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | cb = DN_SKB_CB(skb); | |
1087 | sk->sk_ack_backlog--; | |
1088 | newsk = dn_alloc_sock(newsock, sk->sk_allocation); | |
1089 | if (newsk == NULL) { | |
1090 | release_sock(sk); | |
1091 | kfree_skb(skb); | |
1092 | return -ENOBUFS; | |
1093 | } | |
1094 | release_sock(sk); | |
1095 | ||
1096 | dst_release(xchg(&newsk->sk_dst_cache, skb->dst)); | |
1097 | skb->dst = NULL; | |
1098 | ||
1099 | DN_SK(newsk)->state = DN_CR; | |
1100 | DN_SK(newsk)->addrrem = cb->src_port; | |
1101 | DN_SK(newsk)->services_rem = cb->services; | |
1102 | DN_SK(newsk)->info_rem = cb->info; | |
1103 | DN_SK(newsk)->segsize_rem = cb->segsize; | |
1104 | DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode; | |
1105 | ||
1106 | if (DN_SK(newsk)->segsize_rem < 230) | |
1107 | DN_SK(newsk)->segsize_rem = 230; | |
1108 | ||
1109 | if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE) | |
1110 | DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd; | |
1111 | ||
1112 | newsk->sk_state = TCP_LISTEN; | |
1113 | memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn)); | |
1114 | ||
1115 | /* | |
1116 | * If we are listening on a wild socket, we don't want | |
1117 | * the newly created socket on the wrong hash queue. | |
1118 | */ | |
1119 | DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD; | |
1120 | ||
1121 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type)); | |
1122 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type)); | |
c4ea94ab SW |
1123 | *(__le16 *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src; |
1124 | *(__le16 *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst; | |
1da177e4 LT |
1125 | |
1126 | menuver = *skb->data; | |
1127 | skb_pull(skb, 1); | |
1128 | ||
1129 | if (menuver & DN_MENUVER_ACC) | |
1130 | dn_access_copy(skb, &(DN_SK(newsk)->accessdata)); | |
1131 | ||
1132 | if (menuver & DN_MENUVER_USR) | |
1133 | dn_user_copy(skb, &(DN_SK(newsk)->conndata_in)); | |
1134 | ||
1135 | if (menuver & DN_MENUVER_PRX) | |
1136 | DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY; | |
1137 | ||
1138 | if (menuver & DN_MENUVER_UIC) | |
1139 | DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY; | |
1140 | ||
1141 | kfree_skb(skb); | |
1142 | ||
1143 | memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out), | |
1144 | sizeof(struct optdata_dn)); | |
1145 | memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out), | |
1146 | sizeof(struct optdata_dn)); | |
1147 | ||
1148 | lock_sock(newsk); | |
1149 | err = dn_hash_sock(newsk); | |
1150 | if (err == 0) { | |
1151 | sock_reset_flag(newsk, SOCK_ZAPPED); | |
1152 | dn_send_conn_ack(newsk); | |
1153 | ||
1154 | /* | |
1155 | * Here we use sk->sk_allocation since although the conn conf is | |
1156 | * for the newsk, the context is the old socket. | |
1157 | */ | |
1158 | if (DN_SK(newsk)->accept_mode == ACC_IMMED) | |
1159 | err = dn_confirm_accept(newsk, &timeo, | |
1160 | sk->sk_allocation); | |
1161 | } | |
1162 | release_sock(newsk); | |
1163 | return err; | |
1164 | } | |
1165 | ||
1166 | ||
1167 | static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int *uaddr_len,int peer) | |
1168 | { | |
1169 | struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr; | |
1170 | struct sock *sk = sock->sk; | |
1171 | struct dn_scp *scp = DN_SK(sk); | |
1172 | ||
1173 | *uaddr_len = sizeof(struct sockaddr_dn); | |
1174 | ||
1175 | lock_sock(sk); | |
1176 | ||
1177 | if (peer) { | |
1178 | if ((sock->state != SS_CONNECTED && | |
1179 | sock->state != SS_CONNECTING) && | |
1180 | scp->accept_mode == ACC_IMMED) | |
1181 | return -ENOTCONN; | |
1182 | ||
1183 | memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn)); | |
1184 | } else { | |
1185 | memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn)); | |
1186 | } | |
1187 | ||
1188 | release_sock(sk); | |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | ||
1194 | static unsigned int dn_poll(struct file *file, struct socket *sock, poll_table *wait) | |
1195 | { | |
1196 | struct sock *sk = sock->sk; | |
1197 | struct dn_scp *scp = DN_SK(sk); | |
1198 | int mask = datagram_poll(file, sock, wait); | |
1199 | ||
b03efcfb | 1200 | if (!skb_queue_empty(&scp->other_receive_queue)) |
1da177e4 LT |
1201 | mask |= POLLRDBAND; |
1202 | ||
1203 | return mask; | |
1204 | } | |
1205 | ||
1206 | static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1207 | { | |
1208 | struct sock *sk = sock->sk; | |
1209 | struct dn_scp *scp = DN_SK(sk); | |
1210 | int err = -EOPNOTSUPP; | |
1211 | long amount = 0; | |
1212 | struct sk_buff *skb; | |
1213 | int val; | |
1214 | ||
1215 | switch(cmd) | |
1216 | { | |
1217 | case SIOCGIFADDR: | |
1218 | case SIOCSIFADDR: | |
1219 | return dn_dev_ioctl(cmd, (void __user *)arg); | |
1220 | ||
1221 | case SIOCATMARK: | |
1222 | lock_sock(sk); | |
b03efcfb | 1223 | val = !skb_queue_empty(&scp->other_receive_queue); |
1da177e4 LT |
1224 | if (scp->state != DN_RUN) |
1225 | val = -ENOTCONN; | |
1226 | release_sock(sk); | |
1227 | return val; | |
1228 | ||
1229 | case TIOCOUTQ: | |
1230 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1231 | if (amount < 0) | |
1232 | amount = 0; | |
1233 | err = put_user(amount, (int __user *)arg); | |
1234 | break; | |
1235 | ||
1236 | case TIOCINQ: | |
1237 | lock_sock(sk); | |
1238 | if ((skb = skb_peek(&scp->other_receive_queue)) != NULL) { | |
1239 | amount = skb->len; | |
1240 | } else { | |
1241 | struct sk_buff *skb = sk->sk_receive_queue.next; | |
1242 | for(;;) { | |
1243 | if (skb == | |
1244 | (struct sk_buff *)&sk->sk_receive_queue) | |
1245 | break; | |
1246 | amount += skb->len; | |
1247 | skb = skb->next; | |
1248 | } | |
1249 | } | |
1250 | release_sock(sk); | |
1251 | err = put_user(amount, (int __user *)arg); | |
1252 | break; | |
1253 | ||
1254 | default: | |
b5e5fa5e | 1255 | err = -ENOIOCTLCMD; |
1da177e4 LT |
1256 | break; |
1257 | } | |
1258 | ||
1259 | return err; | |
1260 | } | |
1261 | ||
1262 | static int dn_listen(struct socket *sock, int backlog) | |
1263 | { | |
1264 | struct sock *sk = sock->sk; | |
1265 | int err = -EINVAL; | |
1266 | ||
1267 | lock_sock(sk); | |
1268 | ||
1269 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1270 | goto out; | |
1271 | ||
1272 | if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN)) | |
1273 | goto out; | |
1274 | ||
1275 | sk->sk_max_ack_backlog = backlog; | |
1276 | sk->sk_ack_backlog = 0; | |
1277 | sk->sk_state = TCP_LISTEN; | |
1278 | err = 0; | |
1279 | dn_rehash_sock(sk); | |
1280 | ||
1281 | out: | |
1282 | release_sock(sk); | |
1283 | ||
1284 | return err; | |
1285 | } | |
1286 | ||
1287 | ||
1288 | static int dn_shutdown(struct socket *sock, int how) | |
1289 | { | |
1290 | struct sock *sk = sock->sk; | |
1291 | struct dn_scp *scp = DN_SK(sk); | |
1292 | int err = -ENOTCONN; | |
1293 | ||
1294 | lock_sock(sk); | |
1295 | ||
1296 | if (sock->state == SS_UNCONNECTED) | |
1297 | goto out; | |
1298 | ||
1299 | err = 0; | |
1300 | if (sock->state == SS_DISCONNECTING) | |
1301 | goto out; | |
1302 | ||
1303 | err = -EINVAL; | |
1304 | if (scp->state == DN_O) | |
1305 | goto out; | |
1306 | ||
1307 | if (how != SHUTDOWN_MASK) | |
1308 | goto out; | |
1309 | ||
1310 | sk->sk_shutdown = how; | |
1311 | dn_destroy_sock(sk); | |
1312 | err = 0; | |
1313 | ||
1314 | out: | |
1315 | release_sock(sk); | |
1316 | ||
1317 | return err; | |
1318 | } | |
1319 | ||
1320 | static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) | |
1321 | { | |
1322 | struct sock *sk = sock->sk; | |
1323 | int err; | |
1324 | ||
1325 | lock_sock(sk); | |
1326 | err = __dn_setsockopt(sock, level, optname, optval, optlen, 0); | |
1327 | release_sock(sk); | |
1328 | ||
1329 | return err; | |
1330 | } | |
1331 | ||
1332 | static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, int optlen, int flags) | |
1333 | { | |
1334 | struct sock *sk = sock->sk; | |
1335 | struct dn_scp *scp = DN_SK(sk); | |
1336 | long timeo; | |
1337 | union { | |
1338 | struct optdata_dn opt; | |
1339 | struct accessdata_dn acc; | |
1340 | int mode; | |
1341 | unsigned long win; | |
1342 | int val; | |
1343 | unsigned char services; | |
1344 | unsigned char info; | |
1345 | } u; | |
1346 | int err; | |
1347 | ||
1348 | if (optlen && !optval) | |
1349 | return -EINVAL; | |
1350 | ||
1351 | if (optlen > sizeof(u)) | |
1352 | return -EINVAL; | |
1353 | ||
1354 | if (copy_from_user(&u, optval, optlen)) | |
1355 | return -EFAULT; | |
1356 | ||
1357 | switch(optname) { | |
1358 | case DSO_CONDATA: | |
1359 | if (sock->state == SS_CONNECTED) | |
1360 | return -EISCONN; | |
1361 | if ((scp->state != DN_O) && (scp->state != DN_CR)) | |
1362 | return -EINVAL; | |
1363 | ||
1364 | if (optlen != sizeof(struct optdata_dn)) | |
1365 | return -EINVAL; | |
1366 | ||
c4ea94ab | 1367 | if (dn_ntohs(u.opt.opt_optl) > 16) |
1da177e4 LT |
1368 | return -EINVAL; |
1369 | ||
1370 | memcpy(&scp->conndata_out, &u.opt, optlen); | |
1371 | break; | |
1372 | ||
1373 | case DSO_DISDATA: | |
1374 | if (sock->state != SS_CONNECTED && scp->accept_mode == ACC_IMMED) | |
1375 | return -ENOTCONN; | |
1376 | ||
1377 | if (optlen != sizeof(struct optdata_dn)) | |
1378 | return -EINVAL; | |
1379 | ||
c4ea94ab | 1380 | if (dn_ntohs(u.opt.opt_optl) > 16) |
1da177e4 LT |
1381 | return -EINVAL; |
1382 | ||
1383 | memcpy(&scp->discdata_out, &u.opt, optlen); | |
1384 | break; | |
1385 | ||
1386 | case DSO_CONACCESS: | |
1387 | if (sock->state == SS_CONNECTED) | |
1388 | return -EISCONN; | |
1389 | if (scp->state != DN_O) | |
1390 | return -EINVAL; | |
1391 | ||
1392 | if (optlen != sizeof(struct accessdata_dn)) | |
1393 | return -EINVAL; | |
1394 | ||
1395 | if ((u.acc.acc_accl > DN_MAXACCL) || | |
1396 | (u.acc.acc_passl > DN_MAXACCL) || | |
1397 | (u.acc.acc_userl > DN_MAXACCL)) | |
1398 | return -EINVAL; | |
1399 | ||
1400 | memcpy(&scp->accessdata, &u.acc, optlen); | |
1401 | break; | |
1402 | ||
1403 | case DSO_ACCEPTMODE: | |
1404 | if (sock->state == SS_CONNECTED) | |
1405 | return -EISCONN; | |
1406 | if (scp->state != DN_O) | |
1407 | return -EINVAL; | |
1408 | ||
1409 | if (optlen != sizeof(int)) | |
1410 | return -EINVAL; | |
1411 | ||
1412 | if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER)) | |
1413 | return -EINVAL; | |
1414 | ||
1415 | scp->accept_mode = (unsigned char)u.mode; | |
1416 | break; | |
1417 | ||
1418 | case DSO_CONACCEPT: | |
1419 | ||
1420 | if (scp->state != DN_CR) | |
1421 | return -EINVAL; | |
1422 | timeo = sock_rcvtimeo(sk, 0); | |
1423 | err = dn_confirm_accept(sk, &timeo, sk->sk_allocation); | |
1424 | return err; | |
1425 | ||
1426 | case DSO_CONREJECT: | |
1427 | ||
1428 | if (scp->state != DN_CR) | |
1429 | return -EINVAL; | |
1430 | ||
1431 | scp->state = DN_DR; | |
1432 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1433 | dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation); | |
1434 | break; | |
1435 | ||
1436 | default: | |
1437 | #ifdef CONFIG_NETFILTER | |
1438 | return nf_setsockopt(sk, PF_DECnet, optname, optval, optlen); | |
1439 | #endif | |
1440 | case DSO_LINKINFO: | |
1441 | case DSO_STREAM: | |
1442 | case DSO_SEQPACKET: | |
1443 | return -ENOPROTOOPT; | |
1444 | ||
1445 | case DSO_MAXWINDOW: | |
1446 | if (optlen != sizeof(unsigned long)) | |
1447 | return -EINVAL; | |
1448 | if (u.win > NSP_MAX_WINDOW) | |
1449 | u.win = NSP_MAX_WINDOW; | |
1450 | if (u.win == 0) | |
1451 | return -EINVAL; | |
1452 | scp->max_window = u.win; | |
1453 | if (scp->snd_window > u.win) | |
1454 | scp->snd_window = u.win; | |
1455 | break; | |
1456 | ||
1457 | case DSO_NODELAY: | |
1458 | if (optlen != sizeof(int)) | |
1459 | return -EINVAL; | |
1460 | if (scp->nonagle == 2) | |
1461 | return -EINVAL; | |
1462 | scp->nonagle = (u.val == 0) ? 0 : 1; | |
1463 | /* if (scp->nonagle == 1) { Push pending frames } */ | |
1464 | break; | |
1465 | ||
1466 | case DSO_CORK: | |
1467 | if (optlen != sizeof(int)) | |
1468 | return -EINVAL; | |
1469 | if (scp->nonagle == 1) | |
1470 | return -EINVAL; | |
1471 | scp->nonagle = (u.val == 0) ? 0 : 2; | |
1472 | /* if (scp->nonagle == 0) { Push pending frames } */ | |
1473 | break; | |
1474 | ||
1475 | case DSO_SERVICES: | |
1476 | if (optlen != sizeof(unsigned char)) | |
1477 | return -EINVAL; | |
1478 | if ((u.services & ~NSP_FC_MASK) != 0x01) | |
1479 | return -EINVAL; | |
1480 | if ((u.services & NSP_FC_MASK) == NSP_FC_MASK) | |
1481 | return -EINVAL; | |
1482 | scp->services_loc = u.services; | |
1483 | break; | |
1484 | ||
1485 | case DSO_INFO: | |
1486 | if (optlen != sizeof(unsigned char)) | |
1487 | return -EINVAL; | |
1488 | if (u.info & 0xfc) | |
1489 | return -EINVAL; | |
1490 | scp->info_loc = u.info; | |
1491 | break; | |
1492 | } | |
1493 | ||
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
1498 | { | |
1499 | struct sock *sk = sock->sk; | |
1500 | int err; | |
1501 | ||
1502 | lock_sock(sk); | |
1503 | err = __dn_getsockopt(sock, level, optname, optval, optlen, 0); | |
1504 | release_sock(sk); | |
1505 | ||
1506 | return err; | |
1507 | } | |
1508 | ||
1509 | static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags) | |
1510 | { | |
1511 | struct sock *sk = sock->sk; | |
1512 | struct dn_scp *scp = DN_SK(sk); | |
1513 | struct linkinfo_dn link; | |
1514 | unsigned int r_len; | |
1515 | void *r_data = NULL; | |
1516 | unsigned int val; | |
1517 | ||
1518 | if(get_user(r_len , optlen)) | |
1519 | return -EFAULT; | |
1520 | ||
1521 | switch(optname) { | |
1522 | case DSO_CONDATA: | |
1523 | if (r_len > sizeof(struct optdata_dn)) | |
1524 | r_len = sizeof(struct optdata_dn); | |
1525 | r_data = &scp->conndata_in; | |
1526 | break; | |
1527 | ||
1528 | case DSO_DISDATA: | |
1529 | if (r_len > sizeof(struct optdata_dn)) | |
1530 | r_len = sizeof(struct optdata_dn); | |
1531 | r_data = &scp->discdata_in; | |
1532 | break; | |
1533 | ||
1534 | case DSO_CONACCESS: | |
1535 | if (r_len > sizeof(struct accessdata_dn)) | |
1536 | r_len = sizeof(struct accessdata_dn); | |
1537 | r_data = &scp->accessdata; | |
1538 | break; | |
1539 | ||
1540 | case DSO_ACCEPTMODE: | |
1541 | if (r_len > sizeof(unsigned char)) | |
1542 | r_len = sizeof(unsigned char); | |
1543 | r_data = &scp->accept_mode; | |
1544 | break; | |
1545 | ||
1546 | case DSO_LINKINFO: | |
1547 | if (r_len > sizeof(struct linkinfo_dn)) | |
1548 | r_len = sizeof(struct linkinfo_dn); | |
1549 | ||
1550 | switch(sock->state) { | |
1551 | case SS_CONNECTING: | |
1552 | link.idn_linkstate = LL_CONNECTING; | |
1553 | break; | |
1554 | case SS_DISCONNECTING: | |
1555 | link.idn_linkstate = LL_DISCONNECTING; | |
1556 | break; | |
1557 | case SS_CONNECTED: | |
1558 | link.idn_linkstate = LL_RUNNING; | |
1559 | break; | |
1560 | default: | |
1561 | link.idn_linkstate = LL_INACTIVE; | |
1562 | } | |
1563 | ||
1564 | link.idn_segsize = scp->segsize_rem; | |
1565 | r_data = &link; | |
1566 | break; | |
1567 | ||
1568 | default: | |
1569 | #ifdef CONFIG_NETFILTER | |
1570 | { | |
1571 | int val, len; | |
1572 | ||
1573 | if(get_user(len, optlen)) | |
1574 | return -EFAULT; | |
1575 | ||
1576 | val = nf_getsockopt(sk, PF_DECnet, optname, | |
1577 | optval, &len); | |
1578 | if (val >= 0) | |
1579 | val = put_user(len, optlen); | |
1580 | return val; | |
1581 | } | |
1582 | #endif | |
1583 | case DSO_STREAM: | |
1584 | case DSO_SEQPACKET: | |
1585 | case DSO_CONACCEPT: | |
1586 | case DSO_CONREJECT: | |
1587 | return -ENOPROTOOPT; | |
1588 | ||
1589 | case DSO_MAXWINDOW: | |
1590 | if (r_len > sizeof(unsigned long)) | |
1591 | r_len = sizeof(unsigned long); | |
1592 | r_data = &scp->max_window; | |
1593 | break; | |
1594 | ||
1595 | case DSO_NODELAY: | |
1596 | if (r_len > sizeof(int)) | |
1597 | r_len = sizeof(int); | |
1598 | val = (scp->nonagle == 1); | |
1599 | r_data = &val; | |
1600 | break; | |
1601 | ||
1602 | case DSO_CORK: | |
1603 | if (r_len > sizeof(int)) | |
1604 | r_len = sizeof(int); | |
1605 | val = (scp->nonagle == 2); | |
1606 | r_data = &val; | |
1607 | break; | |
1608 | ||
1609 | case DSO_SERVICES: | |
1610 | if (r_len > sizeof(unsigned char)) | |
1611 | r_len = sizeof(unsigned char); | |
1612 | r_data = &scp->services_rem; | |
1613 | break; | |
1614 | ||
1615 | case DSO_INFO: | |
1616 | if (r_len > sizeof(unsigned char)) | |
1617 | r_len = sizeof(unsigned char); | |
1618 | r_data = &scp->info_rem; | |
1619 | break; | |
1620 | } | |
1621 | ||
1622 | if (r_data) { | |
1623 | if (copy_to_user(optval, r_data, r_len)) | |
1624 | return -EFAULT; | |
1625 | if (put_user(r_len, optlen)) | |
1626 | return -EFAULT; | |
1627 | } | |
1628 | ||
1629 | return 0; | |
1630 | } | |
1631 | ||
1632 | ||
1633 | static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target) | |
1634 | { | |
1635 | struct sk_buff *skb = q->next; | |
1636 | int len = 0; | |
1637 | ||
1638 | if (flags & MSG_OOB) | |
b03efcfb | 1639 | return !skb_queue_empty(q) ? 1 : 0; |
1da177e4 LT |
1640 | |
1641 | while(skb != (struct sk_buff *)q) { | |
1642 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
1643 | len += skb->len; | |
1644 | ||
1645 | if (cb->nsp_flags & 0x40) { | |
1646 | /* SOCK_SEQPACKET reads to EOM */ | |
1647 | if (sk->sk_type == SOCK_SEQPACKET) | |
1648 | return 1; | |
1649 | /* so does SOCK_STREAM unless WAITALL is specified */ | |
1650 | if (!(flags & MSG_WAITALL)) | |
1651 | return 1; | |
1652 | } | |
1653 | ||
1654 | /* minimum data length for read exceeded */ | |
1655 | if (len >= target) | |
1656 | return 1; | |
1657 | ||
1658 | skb = skb->next; | |
1659 | } | |
1660 | ||
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | ||
1665 | static int dn_recvmsg(struct kiocb *iocb, struct socket *sock, | |
1666 | struct msghdr *msg, size_t size, int flags) | |
1667 | { | |
1668 | struct sock *sk = sock->sk; | |
1669 | struct dn_scp *scp = DN_SK(sk); | |
1670 | struct sk_buff_head *queue = &sk->sk_receive_queue; | |
1671 | size_t target = size > 1 ? 1 : 0; | |
1672 | size_t copied = 0; | |
1673 | int rv = 0; | |
1674 | struct sk_buff *skb, *nskb; | |
1675 | struct dn_skb_cb *cb = NULL; | |
1676 | unsigned char eor = 0; | |
1677 | long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
1678 | ||
1679 | lock_sock(sk); | |
1680 | ||
1681 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1682 | rv = -EADDRNOTAVAIL; | |
1683 | goto out; | |
1684 | } | |
1685 | ||
1da177e4 | 1686 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9eb5c94e | 1687 | rv = 0; |
1da177e4 LT |
1688 | goto out; |
1689 | } | |
1690 | ||
9eb5c94e PC |
1691 | rv = dn_check_state(sk, NULL, 0, &timeo, flags); |
1692 | if (rv) | |
1693 | goto out; | |
1694 | ||
c60992db | 1695 | if (flags & ~(MSG_CMSG_COMPAT|MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) { |
1da177e4 LT |
1696 | rv = -EOPNOTSUPP; |
1697 | goto out; | |
1698 | } | |
1699 | ||
1700 | if (flags & MSG_OOB) | |
1701 | queue = &scp->other_receive_queue; | |
1702 | ||
1703 | if (flags & MSG_WAITALL) | |
1704 | target = size; | |
1705 | ||
1706 | ||
1707 | /* | |
1708 | * See if there is data ready to read, sleep if there isn't | |
1709 | */ | |
1710 | for(;;) { | |
1711 | if (sk->sk_err) | |
1712 | goto out; | |
1713 | ||
b03efcfb | 1714 | if (!skb_queue_empty(&scp->other_receive_queue)) { |
1da177e4 LT |
1715 | if (!(flags & MSG_OOB)) { |
1716 | msg->msg_flags |= MSG_OOB; | |
1717 | if (!scp->other_report) { | |
1718 | scp->other_report = 1; | |
1719 | goto out; | |
1720 | } | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | if (scp->state != DN_RUN) | |
1725 | goto out; | |
1726 | ||
1727 | if (signal_pending(current)) { | |
1728 | rv = sock_intr_errno(timeo); | |
1729 | goto out; | |
1730 | } | |
1731 | ||
1732 | if (dn_data_ready(sk, queue, flags, target)) | |
1733 | break; | |
1734 | ||
1735 | if (flags & MSG_DONTWAIT) { | |
1736 | rv = -EWOULDBLOCK; | |
1737 | goto out; | |
1738 | } | |
1739 | ||
1740 | set_bit(SOCK_ASYNC_WAITDATA, &sock->flags); | |
1741 | SOCK_SLEEP_PRE(sk) | |
1742 | ||
1743 | if (!dn_data_ready(sk, queue, flags, target)) | |
1744 | schedule(); | |
1745 | ||
1746 | SOCK_SLEEP_POST(sk) | |
1747 | clear_bit(SOCK_ASYNC_WAITDATA, &sock->flags); | |
1748 | } | |
1749 | ||
1750 | for(skb = queue->next; skb != (struct sk_buff *)queue; skb = nskb) { | |
1751 | unsigned int chunk = skb->len; | |
1752 | cb = DN_SKB_CB(skb); | |
1753 | ||
1754 | if ((chunk + copied) > size) | |
1755 | chunk = size - copied; | |
1756 | ||
1757 | if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) { | |
1758 | rv = -EFAULT; | |
1759 | break; | |
1760 | } | |
1761 | copied += chunk; | |
1762 | ||
1763 | if (!(flags & MSG_PEEK)) | |
1764 | skb_pull(skb, chunk); | |
1765 | ||
1766 | eor = cb->nsp_flags & 0x40; | |
1767 | nskb = skb->next; | |
1768 | ||
1769 | if (skb->len == 0) { | |
8728b834 | 1770 | skb_unlink(skb, queue); |
1da177e4 LT |
1771 | kfree_skb(skb); |
1772 | /* | |
1773 | * N.B. Don't refer to skb or cb after this point | |
1774 | * in loop. | |
1775 | */ | |
1776 | if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) { | |
1777 | scp->flowloc_sw = DN_SEND; | |
1778 | dn_nsp_send_link(sk, DN_SEND, 0); | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | if (eor) { | |
1783 | if (sk->sk_type == SOCK_SEQPACKET) | |
1784 | break; | |
1785 | if (!(flags & MSG_WAITALL)) | |
1786 | break; | |
1787 | } | |
1788 | ||
1789 | if (flags & MSG_OOB) | |
1790 | break; | |
1791 | ||
1792 | if (copied >= target) | |
1793 | break; | |
1794 | } | |
1795 | ||
1796 | rv = copied; | |
1797 | ||
1798 | ||
1799 | if (eor && (sk->sk_type == SOCK_SEQPACKET)) | |
1800 | msg->msg_flags |= MSG_EOR; | |
1801 | ||
1802 | out: | |
1803 | if (rv == 0) | |
1804 | rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk); | |
1805 | ||
1806 | if ((rv >= 0) && msg->msg_name) { | |
1807 | memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn)); | |
1808 | msg->msg_namelen = sizeof(struct sockaddr_dn); | |
1809 | } | |
1810 | ||
1811 | release_sock(sk); | |
1812 | ||
1813 | return rv; | |
1814 | } | |
1815 | ||
1816 | ||
1817 | static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags) | |
1818 | { | |
1819 | unsigned char fctype = scp->services_rem & NSP_FC_MASK; | |
1820 | if (skb_queue_len(queue) >= scp->snd_window) | |
1821 | return 1; | |
1822 | if (fctype != NSP_FC_NONE) { | |
1823 | if (flags & MSG_OOB) { | |
1824 | if (scp->flowrem_oth == 0) | |
1825 | return 1; | |
1826 | } else { | |
1827 | if (scp->flowrem_dat == 0) | |
1828 | return 1; | |
1829 | } | |
1830 | } | |
1831 | return 0; | |
1832 | } | |
1833 | ||
1834 | /* | |
1835 | * The DECnet spec requires the the "routing layer" accepts packets which | |
1836 | * are at least 230 bytes in size. This excludes any headers which the NSP | |
1837 | * layer might add, so we always assume that we'll be using the maximal | |
1838 | * length header on data packets. The variation in length is due to the | |
1839 | * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't | |
1840 | * make much practical difference. | |
1841 | */ | |
1842 | unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu) | |
1843 | { | |
1844 | unsigned mss = 230 - DN_MAX_NSP_DATA_HEADER; | |
1845 | if (dev) { | |
1846 | struct dn_dev *dn_db = dev->dn_ptr; | |
1847 | mtu -= LL_RESERVED_SPACE(dev); | |
1848 | if (dn_db->use_long) | |
1849 | mtu -= 21; | |
1850 | else | |
1851 | mtu -= 6; | |
1852 | mtu -= DN_MAX_NSP_DATA_HEADER; | |
1853 | } else { | |
1854 | /* | |
1855 | * 21 = long header, 16 = guess at MAC header length | |
1856 | */ | |
1857 | mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16); | |
1858 | } | |
1859 | if (mtu > mss) | |
1860 | mss = mtu; | |
1861 | return mss; | |
1862 | } | |
1863 | ||
1864 | static inline unsigned int dn_current_mss(struct sock *sk, int flags) | |
1865 | { | |
1866 | struct dst_entry *dst = __sk_dst_get(sk); | |
1867 | struct dn_scp *scp = DN_SK(sk); | |
1868 | int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem); | |
1869 | ||
1870 | /* Other data messages are limited to 16 bytes per packet */ | |
1871 | if (flags & MSG_OOB) | |
1872 | return 16; | |
1873 | ||
1874 | /* This works out the maximum size of segment we can send out */ | |
1875 | if (dst) { | |
1876 | u32 mtu = dst_mtu(dst); | |
1877 | mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now); | |
1878 | } | |
1879 | ||
1880 | return mss_now; | |
1881 | } | |
1882 | ||
12a49ffd PC |
1883 | /* |
1884 | * N.B. We get the timeout wrong here, but then we always did get it | |
1885 | * wrong before and this is another step along the road to correcting | |
1886 | * it. It ought to get updated each time we pass through the routine, | |
1887 | * but in practise it probably doesn't matter too much for now. | |
1888 | */ | |
1889 | static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk, | |
1890 | unsigned long datalen, int noblock, | |
1891 | int *errcode) | |
1892 | { | |
1893 | struct sk_buff *skb = sock_alloc_send_skb(sk, datalen, | |
1894 | noblock, errcode); | |
1895 | if (skb) { | |
1896 | skb->protocol = __constant_htons(ETH_P_DNA_RT); | |
1897 | skb->pkt_type = PACKET_OUTGOING; | |
1898 | } | |
1899 | return skb; | |
1900 | } | |
1901 | ||
1da177e4 | 1902 | static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, |
12a49ffd | 1903 | struct msghdr *msg, size_t size) |
1da177e4 LT |
1904 | { |
1905 | struct sock *sk = sock->sk; | |
1906 | struct dn_scp *scp = DN_SK(sk); | |
1907 | size_t mss; | |
1908 | struct sk_buff_head *queue = &scp->data_xmit_queue; | |
1909 | int flags = msg->msg_flags; | |
1910 | int err = 0; | |
1911 | size_t sent = 0; | |
1912 | int addr_len = msg->msg_namelen; | |
1913 | struct sockaddr_dn *addr = (struct sockaddr_dn *)msg->msg_name; | |
1914 | struct sk_buff *skb = NULL; | |
1915 | struct dn_skb_cb *cb; | |
1916 | size_t len; | |
1917 | unsigned char fctype; | |
12a49ffd | 1918 | long timeo; |
1da177e4 LT |
1919 | |
1920 | if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT)) | |
1921 | return -EOPNOTSUPP; | |
1922 | ||
1923 | if (addr_len && (addr_len != sizeof(struct sockaddr_dn))) | |
1924 | return -EINVAL; | |
1925 | ||
12a49ffd PC |
1926 | lock_sock(sk); |
1927 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); | |
1da177e4 LT |
1928 | /* |
1929 | * The only difference between stream sockets and sequenced packet | |
1930 | * sockets is that the stream sockets always behave as if MSG_EOR | |
1931 | * has been set. | |
1932 | */ | |
1933 | if (sock->type == SOCK_STREAM) { | |
12a49ffd PC |
1934 | if (flags & MSG_EOR) { |
1935 | err = -EINVAL; | |
1936 | goto out; | |
1937 | } | |
1da177e4 LT |
1938 | flags |= MSG_EOR; |
1939 | } | |
1940 | ||
1da177e4 LT |
1941 | |
1942 | err = dn_check_state(sk, addr, addr_len, &timeo, flags); | |
1943 | if (err) | |
1944 | goto out_err; | |
1945 | ||
1946 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1947 | err = -EPIPE; | |
9eb5c94e PC |
1948 | if (!(flags & MSG_NOSIGNAL)) |
1949 | send_sig(SIGPIPE, current, 0); | |
1da177e4 LT |
1950 | goto out_err; |
1951 | } | |
1952 | ||
1953 | if ((flags & MSG_TRYHARD) && sk->sk_dst_cache) | |
1954 | dst_negative_advice(&sk->sk_dst_cache); | |
1955 | ||
1956 | mss = scp->segsize_rem; | |
1957 | fctype = scp->services_rem & NSP_FC_MASK; | |
1958 | ||
1959 | mss = dn_current_mss(sk, flags); | |
1960 | ||
1961 | if (flags & MSG_OOB) { | |
1962 | queue = &scp->other_xmit_queue; | |
1963 | if (size > mss) { | |
1964 | err = -EMSGSIZE; | |
1965 | goto out; | |
1966 | } | |
1967 | } | |
1968 | ||
1969 | scp->persist_fxn = dn_nsp_xmit_timeout; | |
1970 | ||
1971 | while(sent < size) { | |
1972 | err = sock_error(sk); | |
1973 | if (err) | |
1974 | goto out; | |
1975 | ||
1976 | if (signal_pending(current)) { | |
1977 | err = sock_intr_errno(timeo); | |
1978 | goto out; | |
1979 | } | |
1980 | ||
1981 | /* | |
1982 | * Calculate size that we wish to send. | |
1983 | */ | |
1984 | len = size - sent; | |
1985 | ||
1986 | if (len > mss) | |
1987 | len = mss; | |
1988 | ||
1989 | /* | |
1990 | * Wait for queue size to go down below the window | |
1991 | * size. | |
1992 | */ | |
1993 | if (dn_queue_too_long(scp, queue, flags)) { | |
1994 | if (flags & MSG_DONTWAIT) { | |
1995 | err = -EWOULDBLOCK; | |
1996 | goto out; | |
1997 | } | |
1998 | ||
1999 | SOCK_SLEEP_PRE(sk) | |
2000 | ||
2001 | if (dn_queue_too_long(scp, queue, flags)) | |
2002 | schedule(); | |
2003 | ||
2004 | SOCK_SLEEP_POST(sk) | |
2005 | ||
2006 | continue; | |
2007 | } | |
2008 | ||
2009 | /* | |
2010 | * Get a suitably sized skb. | |
12a49ffd PC |
2011 | * 64 is a bit of a hack really, but its larger than any |
2012 | * link-layer headers and has served us well as a good | |
2013 | * guess as to their real length. | |
1da177e4 | 2014 | */ |
12a49ffd PC |
2015 | skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER, |
2016 | flags & MSG_DONTWAIT, &err); | |
1da177e4 LT |
2017 | |
2018 | if (err) | |
2019 | break; | |
2020 | ||
2021 | if (!skb) | |
2022 | continue; | |
2023 | ||
2024 | cb = DN_SKB_CB(skb); | |
2025 | ||
12a49ffd | 2026 | skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER); |
1da177e4 LT |
2027 | |
2028 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | |
2029 | err = -EFAULT; | |
2030 | goto out; | |
2031 | } | |
2032 | ||
2033 | if (flags & MSG_OOB) { | |
2034 | cb->nsp_flags = 0x30; | |
2035 | if (fctype != NSP_FC_NONE) | |
2036 | scp->flowrem_oth--; | |
2037 | } else { | |
2038 | cb->nsp_flags = 0x00; | |
2039 | if (scp->seg_total == 0) | |
2040 | cb->nsp_flags |= 0x20; | |
2041 | ||
2042 | scp->seg_total += len; | |
2043 | ||
2044 | if (((sent + len) == size) && (flags & MSG_EOR)) { | |
2045 | cb->nsp_flags |= 0x40; | |
2046 | scp->seg_total = 0; | |
2047 | if (fctype == NSP_FC_SCMC) | |
2048 | scp->flowrem_dat--; | |
2049 | } | |
2050 | if (fctype == NSP_FC_SRC) | |
2051 | scp->flowrem_dat--; | |
2052 | } | |
2053 | ||
2054 | sent += len; | |
2055 | dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB); | |
2056 | skb = NULL; | |
2057 | ||
2058 | scp->persist = dn_nsp_persist(sk); | |
2059 | ||
2060 | } | |
2061 | out: | |
2062 | ||
2063 | if (skb) | |
2064 | kfree_skb(skb); | |
2065 | ||
2066 | release_sock(sk); | |
2067 | ||
2068 | return sent ? sent : err; | |
2069 | ||
2070 | out_err: | |
001ab02a | 2071 | err = sk_stream_error(sk, flags, err); |
1da177e4 LT |
2072 | release_sock(sk); |
2073 | return err; | |
2074 | } | |
2075 | ||
2076 | static int dn_device_event(struct notifier_block *this, unsigned long event, | |
2077 | void *ptr) | |
2078 | { | |
2079 | struct net_device *dev = (struct net_device *)ptr; | |
2080 | ||
2081 | switch(event) { | |
2082 | case NETDEV_UP: | |
2083 | dn_dev_up(dev); | |
2084 | break; | |
2085 | case NETDEV_DOWN: | |
2086 | dn_dev_down(dev); | |
2087 | break; | |
2088 | default: | |
2089 | break; | |
2090 | } | |
2091 | ||
2092 | return NOTIFY_DONE; | |
2093 | } | |
2094 | ||
2095 | static struct notifier_block dn_dev_notifier = { | |
2096 | .notifier_call = dn_device_event, | |
2097 | }; | |
2098 | ||
f2ccd8fa | 2099 | extern int dn_route_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); |
1da177e4 LT |
2100 | |
2101 | static struct packet_type dn_dix_packet_type = { | |
2102 | .type = __constant_htons(ETH_P_DNA_RT), | |
2103 | .dev = NULL, /* All devices */ | |
2104 | .func = dn_route_rcv, | |
2105 | }; | |
2106 | ||
2107 | #ifdef CONFIG_PROC_FS | |
2108 | struct dn_iter_state { | |
2109 | int bucket; | |
2110 | }; | |
2111 | ||
2112 | static struct sock *dn_socket_get_first(struct seq_file *seq) | |
2113 | { | |
2114 | struct dn_iter_state *state = seq->private; | |
2115 | struct sock *n = NULL; | |
2116 | ||
2117 | for(state->bucket = 0; | |
2118 | state->bucket < DN_SK_HASH_SIZE; | |
2119 | ++state->bucket) { | |
2120 | n = sk_head(&dn_sk_hash[state->bucket]); | |
2121 | if (n) | |
2122 | break; | |
2123 | } | |
2124 | ||
2125 | return n; | |
2126 | } | |
2127 | ||
2128 | static struct sock *dn_socket_get_next(struct seq_file *seq, | |
2129 | struct sock *n) | |
2130 | { | |
2131 | struct dn_iter_state *state = seq->private; | |
2132 | ||
2133 | n = sk_next(n); | |
2134 | try_again: | |
2135 | if (n) | |
2136 | goto out; | |
2137 | if (++state->bucket >= DN_SK_HASH_SIZE) | |
2138 | goto out; | |
2139 | n = sk_head(&dn_sk_hash[state->bucket]); | |
2140 | goto try_again; | |
2141 | out: | |
2142 | return n; | |
2143 | } | |
2144 | ||
2145 | static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos) | |
2146 | { | |
2147 | struct sock *sk = dn_socket_get_first(seq); | |
2148 | ||
2149 | if (sk) { | |
2150 | while(*pos && (sk = dn_socket_get_next(seq, sk))) | |
2151 | --*pos; | |
2152 | } | |
2153 | return *pos ? NULL : sk; | |
2154 | } | |
2155 | ||
2156 | static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos) | |
2157 | { | |
2158 | void *rc; | |
2159 | read_lock_bh(&dn_hash_lock); | |
2160 | rc = socket_get_idx(seq, &pos); | |
2161 | if (!rc) { | |
2162 | read_unlock_bh(&dn_hash_lock); | |
2163 | } | |
2164 | return rc; | |
2165 | } | |
2166 | ||
2167 | static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos) | |
2168 | { | |
2169 | return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2170 | } | |
2171 | ||
2172 | static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2173 | { | |
2174 | void *rc; | |
2175 | ||
2176 | if (v == SEQ_START_TOKEN) { | |
2177 | rc = dn_socket_get_idx(seq, 0); | |
2178 | goto out; | |
2179 | } | |
2180 | ||
2181 | rc = dn_socket_get_next(seq, v); | |
2182 | if (rc) | |
2183 | goto out; | |
2184 | read_unlock_bh(&dn_hash_lock); | |
2185 | out: | |
2186 | ++*pos; | |
2187 | return rc; | |
2188 | } | |
2189 | ||
2190 | static void dn_socket_seq_stop(struct seq_file *seq, void *v) | |
2191 | { | |
2192 | if (v && v != SEQ_START_TOKEN) | |
2193 | read_unlock_bh(&dn_hash_lock); | |
2194 | } | |
2195 | ||
2196 | #define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126) | |
2197 | ||
2198 | static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf) | |
2199 | { | |
2200 | int i; | |
2201 | ||
2202 | switch (dn_ntohs(dn->sdn_objnamel)) { | |
2203 | case 0: | |
2204 | sprintf(buf, "%d", dn->sdn_objnum); | |
2205 | break; | |
2206 | default: | |
2207 | for (i = 0; i < dn_ntohs(dn->sdn_objnamel); i++) { | |
2208 | buf[i] = dn->sdn_objname[i]; | |
2209 | if (IS_NOT_PRINTABLE(buf[i])) | |
2210 | buf[i] = '.'; | |
2211 | } | |
2212 | buf[i] = 0; | |
2213 | } | |
2214 | } | |
2215 | ||
2216 | static char *dn_state2asc(unsigned char state) | |
2217 | { | |
2218 | switch(state) { | |
2219 | case DN_O: | |
2220 | return "OPEN"; | |
2221 | case DN_CR: | |
2222 | return " CR"; | |
2223 | case DN_DR: | |
2224 | return " DR"; | |
2225 | case DN_DRC: | |
2226 | return " DRC"; | |
2227 | case DN_CC: | |
2228 | return " CC"; | |
2229 | case DN_CI: | |
2230 | return " CI"; | |
2231 | case DN_NR: | |
2232 | return " NR"; | |
2233 | case DN_NC: | |
2234 | return " NC"; | |
2235 | case DN_CD: | |
2236 | return " CD"; | |
2237 | case DN_RJ: | |
2238 | return " RJ"; | |
2239 | case DN_RUN: | |
2240 | return " RUN"; | |
2241 | case DN_DI: | |
2242 | return " DI"; | |
2243 | case DN_DIC: | |
2244 | return " DIC"; | |
2245 | case DN_DN: | |
2246 | return " DN"; | |
2247 | case DN_CL: | |
2248 | return " CL"; | |
2249 | case DN_CN: | |
2250 | return " CN"; | |
2251 | } | |
2252 | ||
2253 | return "????"; | |
2254 | } | |
2255 | ||
2256 | static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk) | |
2257 | { | |
2258 | struct dn_scp *scp = DN_SK(sk); | |
2259 | char buf1[DN_ASCBUF_LEN]; | |
2260 | char buf2[DN_ASCBUF_LEN]; | |
2261 | char local_object[DN_MAXOBJL+3]; | |
2262 | char remote_object[DN_MAXOBJL+3]; | |
2263 | ||
2264 | dn_printable_object(&scp->addr, local_object); | |
2265 | dn_printable_object(&scp->peer, remote_object); | |
2266 | ||
2267 | seq_printf(seq, | |
2268 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s " | |
2269 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n", | |
2270 | dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->addr)), buf1), | |
2271 | scp->addrloc, | |
2272 | scp->numdat, | |
2273 | scp->numoth, | |
2274 | scp->ackxmt_dat, | |
2275 | scp->ackxmt_oth, | |
2276 | scp->flowloc_sw, | |
2277 | local_object, | |
2278 | dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->peer)), buf2), | |
2279 | scp->addrrem, | |
2280 | scp->numdat_rcv, | |
2281 | scp->numoth_rcv, | |
2282 | scp->ackrcv_dat, | |
2283 | scp->ackrcv_oth, | |
2284 | scp->flowrem_sw, | |
2285 | remote_object, | |
2286 | dn_state2asc(scp->state), | |
2287 | ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER")); | |
2288 | } | |
2289 | ||
2290 | static int dn_socket_seq_show(struct seq_file *seq, void *v) | |
2291 | { | |
2292 | if (v == SEQ_START_TOKEN) { | |
2293 | seq_puts(seq, "Local Remote\n"); | |
2294 | } else { | |
2295 | dn_socket_format_entry(seq, v); | |
2296 | } | |
2297 | return 0; | |
2298 | } | |
2299 | ||
2300 | static struct seq_operations dn_socket_seq_ops = { | |
2301 | .start = dn_socket_seq_start, | |
2302 | .next = dn_socket_seq_next, | |
2303 | .stop = dn_socket_seq_stop, | |
2304 | .show = dn_socket_seq_show, | |
2305 | }; | |
2306 | ||
2307 | static int dn_socket_seq_open(struct inode *inode, struct file *file) | |
2308 | { | |
2309 | struct seq_file *seq; | |
2310 | int rc = -ENOMEM; | |
2311 | struct dn_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
2312 | ||
2313 | if (!s) | |
2314 | goto out; | |
2315 | ||
2316 | rc = seq_open(file, &dn_socket_seq_ops); | |
2317 | if (rc) | |
2318 | goto out_kfree; | |
2319 | ||
2320 | seq = file->private_data; | |
2321 | seq->private = s; | |
2322 | memset(s, 0, sizeof(*s)); | |
2323 | out: | |
2324 | return rc; | |
2325 | out_kfree: | |
2326 | kfree(s); | |
2327 | goto out; | |
2328 | } | |
2329 | ||
2330 | static struct file_operations dn_socket_seq_fops = { | |
2331 | .owner = THIS_MODULE, | |
2332 | .open = dn_socket_seq_open, | |
2333 | .read = seq_read, | |
2334 | .llseek = seq_lseek, | |
2335 | .release = seq_release_private, | |
2336 | }; | |
2337 | #endif | |
2338 | ||
2339 | static struct net_proto_family dn_family_ops = { | |
2340 | .family = AF_DECnet, | |
2341 | .create = dn_create, | |
2342 | .owner = THIS_MODULE, | |
2343 | }; | |
2344 | ||
90ddc4f0 | 2345 | static const struct proto_ops dn_proto_ops = { |
1da177e4 LT |
2346 | .family = AF_DECnet, |
2347 | .owner = THIS_MODULE, | |
2348 | .release = dn_release, | |
2349 | .bind = dn_bind, | |
2350 | .connect = dn_connect, | |
2351 | .socketpair = sock_no_socketpair, | |
2352 | .accept = dn_accept, | |
2353 | .getname = dn_getname, | |
2354 | .poll = dn_poll, | |
2355 | .ioctl = dn_ioctl, | |
2356 | .listen = dn_listen, | |
2357 | .shutdown = dn_shutdown, | |
2358 | .setsockopt = dn_setsockopt, | |
2359 | .getsockopt = dn_getsockopt, | |
2360 | .sendmsg = dn_sendmsg, | |
2361 | .recvmsg = dn_recvmsg, | |
2362 | .mmap = sock_no_mmap, | |
2363 | .sendpage = sock_no_sendpage, | |
2364 | }; | |
2365 | ||
2366 | void dn_register_sysctl(void); | |
2367 | void dn_unregister_sysctl(void); | |
2368 | ||
2369 | MODULE_DESCRIPTION("The Linux DECnet Network Protocol"); | |
2370 | MODULE_AUTHOR("Linux DECnet Project Team"); | |
2371 | MODULE_LICENSE("GPL"); | |
2372 | MODULE_ALIAS_NETPROTO(PF_DECnet); | |
2373 | ||
2374 | static char banner[] __initdata = KERN_INFO "NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n"; | |
2375 | ||
2376 | static int __init decnet_init(void) | |
2377 | { | |
2378 | int rc; | |
2379 | ||
2380 | printk(banner); | |
2381 | ||
2382 | rc = proto_register(&dn_proto, 1); | |
2383 | if (rc != 0) | |
2384 | goto out; | |
2385 | ||
2386 | dn_neigh_init(); | |
2387 | dn_dev_init(); | |
2388 | dn_route_init(); | |
2389 | dn_fib_init(); | |
2390 | ||
2391 | sock_register(&dn_family_ops); | |
2392 | dev_add_pack(&dn_dix_packet_type); | |
2393 | register_netdevice_notifier(&dn_dev_notifier); | |
2394 | ||
2395 | proc_net_fops_create("decnet", S_IRUGO, &dn_socket_seq_fops); | |
2396 | dn_register_sysctl(); | |
2397 | out: | |
2398 | return rc; | |
2399 | ||
2400 | } | |
2401 | module_init(decnet_init); | |
2402 | ||
2403 | /* | |
2404 | * Prevent DECnet module unloading until its fixed properly. | |
2405 | * Requires an audit of the code to check for memory leaks and | |
2406 | * initialisation problems etc. | |
2407 | */ | |
2408 | #if 0 | |
2409 | static void __exit decnet_exit(void) | |
2410 | { | |
2411 | sock_unregister(AF_DECnet); | |
2412 | dev_remove_pack(&dn_dix_packet_type); | |
2413 | ||
2414 | dn_unregister_sysctl(); | |
2415 | ||
2416 | unregister_netdevice_notifier(&dn_dev_notifier); | |
2417 | ||
2418 | dn_route_cleanup(); | |
2419 | dn_dev_cleanup(); | |
2420 | dn_neigh_cleanup(); | |
2421 | dn_fib_cleanup(); | |
2422 | ||
2423 | proc_net_remove("decnet"); | |
2424 | ||
2425 | proto_unregister(&dn_proto); | |
2426 | } | |
2427 | module_exit(decnet_exit); | |
2428 | #endif |