diff options
Diffstat (limited to 'net/decnet/af_decnet.c')
-rw-r--r-- | net/decnet/af_decnet.c | 2405 |
1 files changed, 2405 insertions, 0 deletions
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c new file mode 100644 index 000000000000..29bb3cd21965 --- /dev/null +++ b/net/decnet/af_decnet.c | |||
@@ -0,0 +1,2405 @@ | |||
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> | ||
121 | #include <net/tcp.h> | ||
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 | |||
455 | static struct sock *dn_alloc_sock(struct socket *sock, int gfp) | ||
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 | */ | ||
539 | if (skb_queue_len(&scp->other_xmit_queue) == 0) | ||
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 | |||
807 | static int dn_confirm_accept(struct sock *sk, long *timeo, int allocation) | ||
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 | |||
1194 | if (skb_queue_len(&scp->other_receive_queue)) | ||
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); | ||
1217 | val = (skb_queue_len(&scp->other_receive_queue) != 0); | ||
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) | ||
1633 | return skb_queue_len(q) ? 1 : 0; | ||
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 | |||
1710 | if (skb_queue_len(&scp->other_receive_queue)) { | ||
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) { | ||
1766 | skb_unlink(skb); | ||
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 | |||
1879 | static int dn_error(struct sock *sk, int flags, int err) | ||
1880 | { | ||
1881 | if (err == -EPIPE) | ||
1882 | err = sock_error(sk) ? : -EPIPE; | ||
1883 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) | ||
1884 | send_sig(SIGPIPE, current, 0); | ||
1885 | return err; | ||
1886 | } | ||
1887 | |||
1888 | static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, | ||
1889 | struct msghdr *msg, size_t size) | ||
1890 | { | ||
1891 | struct sock *sk = sock->sk; | ||
1892 | struct dn_scp *scp = DN_SK(sk); | ||
1893 | size_t mss; | ||
1894 | struct sk_buff_head *queue = &scp->data_xmit_queue; | ||
1895 | int flags = msg->msg_flags; | ||
1896 | int err = 0; | ||
1897 | size_t sent = 0; | ||
1898 | int addr_len = msg->msg_namelen; | ||
1899 | struct sockaddr_dn *addr = (struct sockaddr_dn *)msg->msg_name; | ||
1900 | struct sk_buff *skb = NULL; | ||
1901 | struct dn_skb_cb *cb; | ||
1902 | size_t len; | ||
1903 | unsigned char fctype; | ||
1904 | long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); | ||
1905 | |||
1906 | if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT)) | ||
1907 | return -EOPNOTSUPP; | ||
1908 | |||
1909 | if (addr_len && (addr_len != sizeof(struct sockaddr_dn))) | ||
1910 | return -EINVAL; | ||
1911 | |||
1912 | /* | ||
1913 | * The only difference between stream sockets and sequenced packet | ||
1914 | * sockets is that the stream sockets always behave as if MSG_EOR | ||
1915 | * has been set. | ||
1916 | */ | ||
1917 | if (sock->type == SOCK_STREAM) { | ||
1918 | if (flags & MSG_EOR) | ||
1919 | return -EINVAL; | ||
1920 | flags |= MSG_EOR; | ||
1921 | } | ||
1922 | |||
1923 | lock_sock(sk); | ||
1924 | |||
1925 | err = dn_check_state(sk, addr, addr_len, &timeo, flags); | ||
1926 | if (err) | ||
1927 | goto out_err; | ||
1928 | |||
1929 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | ||
1930 | err = -EPIPE; | ||
1931 | goto out_err; | ||
1932 | } | ||
1933 | |||
1934 | if ((flags & MSG_TRYHARD) && sk->sk_dst_cache) | ||
1935 | dst_negative_advice(&sk->sk_dst_cache); | ||
1936 | |||
1937 | mss = scp->segsize_rem; | ||
1938 | fctype = scp->services_rem & NSP_FC_MASK; | ||
1939 | |||
1940 | mss = dn_current_mss(sk, flags); | ||
1941 | |||
1942 | if (flags & MSG_OOB) { | ||
1943 | queue = &scp->other_xmit_queue; | ||
1944 | if (size > mss) { | ||
1945 | err = -EMSGSIZE; | ||
1946 | goto out; | ||
1947 | } | ||
1948 | } | ||
1949 | |||
1950 | scp->persist_fxn = dn_nsp_xmit_timeout; | ||
1951 | |||
1952 | while(sent < size) { | ||
1953 | err = sock_error(sk); | ||
1954 | if (err) | ||
1955 | goto out; | ||
1956 | |||
1957 | if (signal_pending(current)) { | ||
1958 | err = sock_intr_errno(timeo); | ||
1959 | goto out; | ||
1960 | } | ||
1961 | |||
1962 | /* | ||
1963 | * Calculate size that we wish to send. | ||
1964 | */ | ||
1965 | len = size - sent; | ||
1966 | |||
1967 | if (len > mss) | ||
1968 | len = mss; | ||
1969 | |||
1970 | /* | ||
1971 | * Wait for queue size to go down below the window | ||
1972 | * size. | ||
1973 | */ | ||
1974 | if (dn_queue_too_long(scp, queue, flags)) { | ||
1975 | if (flags & MSG_DONTWAIT) { | ||
1976 | err = -EWOULDBLOCK; | ||
1977 | goto out; | ||
1978 | } | ||
1979 | |||
1980 | SOCK_SLEEP_PRE(sk) | ||
1981 | |||
1982 | if (dn_queue_too_long(scp, queue, flags)) | ||
1983 | schedule(); | ||
1984 | |||
1985 | SOCK_SLEEP_POST(sk) | ||
1986 | |||
1987 | continue; | ||
1988 | } | ||
1989 | |||
1990 | /* | ||
1991 | * Get a suitably sized skb. | ||
1992 | */ | ||
1993 | skb = dn_alloc_send_skb(sk, &len, flags & MSG_DONTWAIT, timeo, &err); | ||
1994 | |||
1995 | if (err) | ||
1996 | break; | ||
1997 | |||
1998 | if (!skb) | ||
1999 | continue; | ||
2000 | |||
2001 | cb = DN_SKB_CB(skb); | ||
2002 | |||
2003 | skb_reserve(skb, DN_MAX_NSP_DATA_HEADER); | ||
2004 | |||
2005 | if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { | ||
2006 | err = -EFAULT; | ||
2007 | goto out; | ||
2008 | } | ||
2009 | |||
2010 | if (flags & MSG_OOB) { | ||
2011 | cb->nsp_flags = 0x30; | ||
2012 | if (fctype != NSP_FC_NONE) | ||
2013 | scp->flowrem_oth--; | ||
2014 | } else { | ||
2015 | cb->nsp_flags = 0x00; | ||
2016 | if (scp->seg_total == 0) | ||
2017 | cb->nsp_flags |= 0x20; | ||
2018 | |||
2019 | scp->seg_total += len; | ||
2020 | |||
2021 | if (((sent + len) == size) && (flags & MSG_EOR)) { | ||
2022 | cb->nsp_flags |= 0x40; | ||
2023 | scp->seg_total = 0; | ||
2024 | if (fctype == NSP_FC_SCMC) | ||
2025 | scp->flowrem_dat--; | ||
2026 | } | ||
2027 | if (fctype == NSP_FC_SRC) | ||
2028 | scp->flowrem_dat--; | ||
2029 | } | ||
2030 | |||
2031 | sent += len; | ||
2032 | dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB); | ||
2033 | skb = NULL; | ||
2034 | |||
2035 | scp->persist = dn_nsp_persist(sk); | ||
2036 | |||
2037 | } | ||
2038 | out: | ||
2039 | |||
2040 | if (skb) | ||
2041 | kfree_skb(skb); | ||
2042 | |||
2043 | release_sock(sk); | ||
2044 | |||
2045 | return sent ? sent : err; | ||
2046 | |||
2047 | out_err: | ||
2048 | err = dn_error(sk, flags, err); | ||
2049 | release_sock(sk); | ||
2050 | return err; | ||
2051 | } | ||
2052 | |||
2053 | static int dn_device_event(struct notifier_block *this, unsigned long event, | ||
2054 | void *ptr) | ||
2055 | { | ||
2056 | struct net_device *dev = (struct net_device *)ptr; | ||
2057 | |||
2058 | switch(event) { | ||
2059 | case NETDEV_UP: | ||
2060 | dn_dev_up(dev); | ||
2061 | break; | ||
2062 | case NETDEV_DOWN: | ||
2063 | dn_dev_down(dev); | ||
2064 | break; | ||
2065 | default: | ||
2066 | break; | ||
2067 | } | ||
2068 | |||
2069 | return NOTIFY_DONE; | ||
2070 | } | ||
2071 | |||
2072 | static struct notifier_block dn_dev_notifier = { | ||
2073 | .notifier_call = dn_device_event, | ||
2074 | }; | ||
2075 | |||
2076 | extern int dn_route_rcv(struct sk_buff *, struct net_device *, struct packet_type *); | ||
2077 | |||
2078 | static struct packet_type dn_dix_packet_type = { | ||
2079 | .type = __constant_htons(ETH_P_DNA_RT), | ||
2080 | .dev = NULL, /* All devices */ | ||
2081 | .func = dn_route_rcv, | ||
2082 | }; | ||
2083 | |||
2084 | #ifdef CONFIG_PROC_FS | ||
2085 | struct dn_iter_state { | ||
2086 | int bucket; | ||
2087 | }; | ||
2088 | |||
2089 | static struct sock *dn_socket_get_first(struct seq_file *seq) | ||
2090 | { | ||
2091 | struct dn_iter_state *state = seq->private; | ||
2092 | struct sock *n = NULL; | ||
2093 | |||
2094 | for(state->bucket = 0; | ||
2095 | state->bucket < DN_SK_HASH_SIZE; | ||
2096 | ++state->bucket) { | ||
2097 | n = sk_head(&dn_sk_hash[state->bucket]); | ||
2098 | if (n) | ||
2099 | break; | ||
2100 | } | ||
2101 | |||
2102 | return n; | ||
2103 | } | ||
2104 | |||
2105 | static struct sock *dn_socket_get_next(struct seq_file *seq, | ||
2106 | struct sock *n) | ||
2107 | { | ||
2108 | struct dn_iter_state *state = seq->private; | ||
2109 | |||
2110 | n = sk_next(n); | ||
2111 | try_again: | ||
2112 | if (n) | ||
2113 | goto out; | ||
2114 | if (++state->bucket >= DN_SK_HASH_SIZE) | ||
2115 | goto out; | ||
2116 | n = sk_head(&dn_sk_hash[state->bucket]); | ||
2117 | goto try_again; | ||
2118 | out: | ||
2119 | return n; | ||
2120 | } | ||
2121 | |||
2122 | static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos) | ||
2123 | { | ||
2124 | struct sock *sk = dn_socket_get_first(seq); | ||
2125 | |||
2126 | if (sk) { | ||
2127 | while(*pos && (sk = dn_socket_get_next(seq, sk))) | ||
2128 | --*pos; | ||
2129 | } | ||
2130 | return *pos ? NULL : sk; | ||
2131 | } | ||
2132 | |||
2133 | static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos) | ||
2134 | { | ||
2135 | void *rc; | ||
2136 | read_lock_bh(&dn_hash_lock); | ||
2137 | rc = socket_get_idx(seq, &pos); | ||
2138 | if (!rc) { | ||
2139 | read_unlock_bh(&dn_hash_lock); | ||
2140 | } | ||
2141 | return rc; | ||
2142 | } | ||
2143 | |||
2144 | static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos) | ||
2145 | { | ||
2146 | return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | ||
2147 | } | ||
2148 | |||
2149 | static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos) | ||
2150 | { | ||
2151 | void *rc; | ||
2152 | |||
2153 | if (v == SEQ_START_TOKEN) { | ||
2154 | rc = dn_socket_get_idx(seq, 0); | ||
2155 | goto out; | ||
2156 | } | ||
2157 | |||
2158 | rc = dn_socket_get_next(seq, v); | ||
2159 | if (rc) | ||
2160 | goto out; | ||
2161 | read_unlock_bh(&dn_hash_lock); | ||
2162 | out: | ||
2163 | ++*pos; | ||
2164 | return rc; | ||
2165 | } | ||
2166 | |||
2167 | static void dn_socket_seq_stop(struct seq_file *seq, void *v) | ||
2168 | { | ||
2169 | if (v && v != SEQ_START_TOKEN) | ||
2170 | read_unlock_bh(&dn_hash_lock); | ||
2171 | } | ||
2172 | |||
2173 | #define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126) | ||
2174 | |||
2175 | static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf) | ||
2176 | { | ||
2177 | int i; | ||
2178 | |||
2179 | switch (dn_ntohs(dn->sdn_objnamel)) { | ||
2180 | case 0: | ||
2181 | sprintf(buf, "%d", dn->sdn_objnum); | ||
2182 | break; | ||
2183 | default: | ||
2184 | for (i = 0; i < dn_ntohs(dn->sdn_objnamel); i++) { | ||
2185 | buf[i] = dn->sdn_objname[i]; | ||
2186 | if (IS_NOT_PRINTABLE(buf[i])) | ||
2187 | buf[i] = '.'; | ||
2188 | } | ||
2189 | buf[i] = 0; | ||
2190 | } | ||
2191 | } | ||
2192 | |||
2193 | static char *dn_state2asc(unsigned char state) | ||
2194 | { | ||
2195 | switch(state) { | ||
2196 | case DN_O: | ||
2197 | return "OPEN"; | ||
2198 | case DN_CR: | ||
2199 | return " CR"; | ||
2200 | case DN_DR: | ||
2201 | return " DR"; | ||
2202 | case DN_DRC: | ||
2203 | return " DRC"; | ||
2204 | case DN_CC: | ||
2205 | return " CC"; | ||
2206 | case DN_CI: | ||
2207 | return " CI"; | ||
2208 | case DN_NR: | ||
2209 | return " NR"; | ||
2210 | case DN_NC: | ||
2211 | return " NC"; | ||
2212 | case DN_CD: | ||
2213 | return " CD"; | ||
2214 | case DN_RJ: | ||
2215 | return " RJ"; | ||
2216 | case DN_RUN: | ||
2217 | return " RUN"; | ||
2218 | case DN_DI: | ||
2219 | return " DI"; | ||
2220 | case DN_DIC: | ||
2221 | return " DIC"; | ||
2222 | case DN_DN: | ||
2223 | return " DN"; | ||
2224 | case DN_CL: | ||
2225 | return " CL"; | ||
2226 | case DN_CN: | ||
2227 | return " CN"; | ||
2228 | } | ||
2229 | |||
2230 | return "????"; | ||
2231 | } | ||
2232 | |||
2233 | static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk) | ||
2234 | { | ||
2235 | struct dn_scp *scp = DN_SK(sk); | ||
2236 | char buf1[DN_ASCBUF_LEN]; | ||
2237 | char buf2[DN_ASCBUF_LEN]; | ||
2238 | char local_object[DN_MAXOBJL+3]; | ||
2239 | char remote_object[DN_MAXOBJL+3]; | ||
2240 | |||
2241 | dn_printable_object(&scp->addr, local_object); | ||
2242 | dn_printable_object(&scp->peer, remote_object); | ||
2243 | |||
2244 | seq_printf(seq, | ||
2245 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s " | ||
2246 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n", | ||
2247 | dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->addr)), buf1), | ||
2248 | scp->addrloc, | ||
2249 | scp->numdat, | ||
2250 | scp->numoth, | ||
2251 | scp->ackxmt_dat, | ||
2252 | scp->ackxmt_oth, | ||
2253 | scp->flowloc_sw, | ||
2254 | local_object, | ||
2255 | dn_addr2asc(dn_ntohs(dn_saddr2dn(&scp->peer)), buf2), | ||
2256 | scp->addrrem, | ||
2257 | scp->numdat_rcv, | ||
2258 | scp->numoth_rcv, | ||
2259 | scp->ackrcv_dat, | ||
2260 | scp->ackrcv_oth, | ||
2261 | scp->flowrem_sw, | ||
2262 | remote_object, | ||
2263 | dn_state2asc(scp->state), | ||
2264 | ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER")); | ||
2265 | } | ||
2266 | |||
2267 | static int dn_socket_seq_show(struct seq_file *seq, void *v) | ||
2268 | { | ||
2269 | if (v == SEQ_START_TOKEN) { | ||
2270 | seq_puts(seq, "Local Remote\n"); | ||
2271 | } else { | ||
2272 | dn_socket_format_entry(seq, v); | ||
2273 | } | ||
2274 | return 0; | ||
2275 | } | ||
2276 | |||
2277 | static struct seq_operations dn_socket_seq_ops = { | ||
2278 | .start = dn_socket_seq_start, | ||
2279 | .next = dn_socket_seq_next, | ||
2280 | .stop = dn_socket_seq_stop, | ||
2281 | .show = dn_socket_seq_show, | ||
2282 | }; | ||
2283 | |||
2284 | static int dn_socket_seq_open(struct inode *inode, struct file *file) | ||
2285 | { | ||
2286 | struct seq_file *seq; | ||
2287 | int rc = -ENOMEM; | ||
2288 | struct dn_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | ||
2289 | |||
2290 | if (!s) | ||
2291 | goto out; | ||
2292 | |||
2293 | rc = seq_open(file, &dn_socket_seq_ops); | ||
2294 | if (rc) | ||
2295 | goto out_kfree; | ||
2296 | |||
2297 | seq = file->private_data; | ||
2298 | seq->private = s; | ||
2299 | memset(s, 0, sizeof(*s)); | ||
2300 | out: | ||
2301 | return rc; | ||
2302 | out_kfree: | ||
2303 | kfree(s); | ||
2304 | goto out; | ||
2305 | } | ||
2306 | |||
2307 | static struct file_operations dn_socket_seq_fops = { | ||
2308 | .owner = THIS_MODULE, | ||
2309 | .open = dn_socket_seq_open, | ||
2310 | .read = seq_read, | ||
2311 | .llseek = seq_lseek, | ||
2312 | .release = seq_release_private, | ||
2313 | }; | ||
2314 | #endif | ||
2315 | |||
2316 | static struct net_proto_family dn_family_ops = { | ||
2317 | .family = AF_DECnet, | ||
2318 | .create = dn_create, | ||
2319 | .owner = THIS_MODULE, | ||
2320 | }; | ||
2321 | |||
2322 | static struct proto_ops dn_proto_ops = { | ||
2323 | .family = AF_DECnet, | ||
2324 | .owner = THIS_MODULE, | ||
2325 | .release = dn_release, | ||
2326 | .bind = dn_bind, | ||
2327 | .connect = dn_connect, | ||
2328 | .socketpair = sock_no_socketpair, | ||
2329 | .accept = dn_accept, | ||
2330 | .getname = dn_getname, | ||
2331 | .poll = dn_poll, | ||
2332 | .ioctl = dn_ioctl, | ||
2333 | .listen = dn_listen, | ||
2334 | .shutdown = dn_shutdown, | ||
2335 | .setsockopt = dn_setsockopt, | ||
2336 | .getsockopt = dn_getsockopt, | ||
2337 | .sendmsg = dn_sendmsg, | ||
2338 | .recvmsg = dn_recvmsg, | ||
2339 | .mmap = sock_no_mmap, | ||
2340 | .sendpage = sock_no_sendpage, | ||
2341 | }; | ||
2342 | |||
2343 | void dn_register_sysctl(void); | ||
2344 | void dn_unregister_sysctl(void); | ||
2345 | |||
2346 | MODULE_DESCRIPTION("The Linux DECnet Network Protocol"); | ||
2347 | MODULE_AUTHOR("Linux DECnet Project Team"); | ||
2348 | MODULE_LICENSE("GPL"); | ||
2349 | MODULE_ALIAS_NETPROTO(PF_DECnet); | ||
2350 | |||
2351 | static char banner[] __initdata = KERN_INFO "NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n"; | ||
2352 | |||
2353 | static int __init decnet_init(void) | ||
2354 | { | ||
2355 | int rc; | ||
2356 | |||
2357 | printk(banner); | ||
2358 | |||
2359 | rc = proto_register(&dn_proto, 1); | ||
2360 | if (rc != 0) | ||
2361 | goto out; | ||
2362 | |||
2363 | dn_neigh_init(); | ||
2364 | dn_dev_init(); | ||
2365 | dn_route_init(); | ||
2366 | dn_fib_init(); | ||
2367 | |||
2368 | sock_register(&dn_family_ops); | ||
2369 | dev_add_pack(&dn_dix_packet_type); | ||
2370 | register_netdevice_notifier(&dn_dev_notifier); | ||
2371 | |||
2372 | proc_net_fops_create("decnet", S_IRUGO, &dn_socket_seq_fops); | ||
2373 | dn_register_sysctl(); | ||
2374 | out: | ||
2375 | return rc; | ||
2376 | |||
2377 | } | ||
2378 | module_init(decnet_init); | ||
2379 | |||
2380 | /* | ||
2381 | * Prevent DECnet module unloading until its fixed properly. | ||
2382 | * Requires an audit of the code to check for memory leaks and | ||
2383 | * initialisation problems etc. | ||
2384 | */ | ||
2385 | #if 0 | ||
2386 | static void __exit decnet_exit(void) | ||
2387 | { | ||
2388 | sock_unregister(AF_DECnet); | ||
2389 | dev_remove_pack(&dn_dix_packet_type); | ||
2390 | |||
2391 | dn_unregister_sysctl(); | ||
2392 | |||
2393 | unregister_netdevice_notifier(&dn_dev_notifier); | ||
2394 | |||
2395 | dn_route_cleanup(); | ||
2396 | dn_dev_cleanup(); | ||
2397 | dn_neigh_cleanup(); | ||
2398 | dn_fib_cleanup(); | ||
2399 | |||
2400 | proc_net_remove("decnet"); | ||
2401 | |||
2402 | proto_unregister(&dn_proto); | ||
2403 | } | ||
2404 | module_exit(decnet_exit); | ||
2405 | #endif | ||