Commit | Line | Data |
---|---|---|
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 | |
429eb0fa | 48 | |
1da177e4 LT |
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 | ||
429eb0fa | 66 | First Development of DECnet Socket La- |
1da177e4 LT |
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 | _ | |
429eb0fa YH |
78 | Added support for incoming connections |
79 | so we can start developing server apps | |
80 | on Linux. | |
1da177e4 LT |
81 | - |
82 | Module Support | |
83 | Version 0.0.4 2.1.109 21-jul-98 Eduardo Marcelo Serrat | |
429eb0fa YH |
84 | (emserrat@geocities.com) |
85 | _ | |
86 | Added support for X11R6.4. Now we can | |
87 | use DECnet transport for X on Linux!!! | |
88 | - | |
1da177e4 | 89 | Version 0.0.5 2.1.110 01-aug-98 Eduardo Marcelo Serrat |
429eb0fa YH |
90 | (emserrat@geocities.com) |
91 | Removed bugs on flow control | |
92 | Removed bugs on incoming accessdata | |
93 | order | |
94 | - | |
1da177e4 | 95 | Version 0.0.6 2.1.110 07-aug-98 Eduardo Marcelo Serrat |
429eb0fa | 96 | dn_recvmsg fixes |
1da177e4 | 97 | |
429eb0fa YH |
98 | Patrick J. Caulfield |
99 | dn_bind fixes | |
1da177e4 LT |
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> | |
3f07c014 | 109 | #include <linux/sched/signal.h> |
1da177e4 LT |
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 | 121 | #include <net/flow.h> |
1da177e4 | 122 | #include <asm/ioctls.h> |
4fc268d2 | 123 | #include <linux/capability.h> |
1da177e4 LT |
124 | #include <linux/mm.h> |
125 | #include <linux/interrupt.h> | |
126 | #include <linux/proc_fs.h> | |
127 | #include <linux/stat.h> | |
128 | #include <linux/init.h> | |
129 | #include <linux/poll.h> | |
c0b80236 | 130 | #include <linux/jiffies.h> |
457c4cbc | 131 | #include <net/net_namespace.h> |
1da177e4 LT |
132 | #include <net/neighbour.h> |
133 | #include <net/dst.h> | |
a8731cbf | 134 | #include <net/fib_rules.h> |
9c28286b | 135 | #include <net/tcp.h> |
1da177e4 LT |
136 | #include <net/dn.h> |
137 | #include <net/dn_nsp.h> | |
138 | #include <net/dn_dev.h> | |
139 | #include <net/dn_route.h> | |
140 | #include <net/dn_fib.h> | |
141 | #include <net/dn_neigh.h> | |
142 | ||
143 | struct dn_sock { | |
144 | struct sock sk; | |
145 | struct dn_scp scp; | |
146 | }; | |
147 | ||
148 | static void dn_keepalive(struct sock *sk); | |
149 | ||
150 | #define DN_SK_HASH_SHIFT 8 | |
151 | #define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT) | |
152 | #define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1) | |
153 | ||
154 | ||
90ddc4f0 | 155 | static const struct proto_ops dn_proto_ops; |
1da177e4 LT |
156 | static DEFINE_RWLOCK(dn_hash_lock); |
157 | static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE]; | |
158 | static struct hlist_head dn_wild_sk; | |
8d987e5c | 159 | static atomic_long_t decnet_memory_allocated; |
1da177e4 | 160 | |
b7058842 | 161 | static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen, int flags); |
1da177e4 LT |
162 | static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags); |
163 | ||
164 | static struct hlist_head *dn_find_list(struct sock *sk) | |
165 | { | |
166 | struct dn_scp *scp = DN_SK(sk); | |
167 | ||
168 | if (scp->addr.sdn_flags & SDF_WILD) | |
169 | return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL; | |
170 | ||
c4106aa8 | 171 | return &dn_sk_hash[le16_to_cpu(scp->addrloc) & DN_SK_HASH_MASK]; |
1da177e4 LT |
172 | } |
173 | ||
429eb0fa | 174 | /* |
1da177e4 LT |
175 | * Valid ports are those greater than zero and not already in use. |
176 | */ | |
c4ea94ab | 177 | static int check_port(__le16 port) |
1da177e4 LT |
178 | { |
179 | struct sock *sk; | |
1da177e4 LT |
180 | |
181 | if (port == 0) | |
182 | return -1; | |
183 | ||
b67bfe0d | 184 | sk_for_each(sk, &dn_sk_hash[le16_to_cpu(port) & DN_SK_HASH_MASK]) { |
1da177e4 LT |
185 | struct dn_scp *scp = DN_SK(sk); |
186 | if (scp->addrloc == port) | |
187 | return -1; | |
188 | } | |
189 | return 0; | |
190 | } | |
191 | ||
192 | static unsigned short port_alloc(struct sock *sk) | |
193 | { | |
194 | struct dn_scp *scp = DN_SK(sk); | |
195 | static unsigned short port = 0x2000; | |
196 | unsigned short i_port = port; | |
197 | ||
c4106aa8 | 198 | while(check_port(cpu_to_le16(++port)) != 0) { |
1da177e4 LT |
199 | if (port == i_port) |
200 | return 0; | |
201 | } | |
202 | ||
c4106aa8 | 203 | scp->addrloc = cpu_to_le16(port); |
1da177e4 LT |
204 | |
205 | return 1; | |
206 | } | |
207 | ||
208 | /* | |
209 | * Since this is only ever called from user | |
210 | * level, we don't need a write_lock() version | |
211 | * of this. | |
212 | */ | |
213 | static int dn_hash_sock(struct sock *sk) | |
214 | { | |
215 | struct dn_scp *scp = DN_SK(sk); | |
216 | struct hlist_head *list; | |
217 | int rv = -EUSERS; | |
218 | ||
219 | BUG_ON(sk_hashed(sk)); | |
220 | ||
221 | write_lock_bh(&dn_hash_lock); | |
429eb0fa | 222 | |
1da177e4 LT |
223 | if (!scp->addrloc && !port_alloc(sk)) |
224 | goto out; | |
225 | ||
226 | rv = -EADDRINUSE; | |
227 | if ((list = dn_find_list(sk)) == NULL) | |
228 | goto out; | |
229 | ||
230 | sk_add_node(sk, list); | |
231 | rv = 0; | |
232 | out: | |
233 | write_unlock_bh(&dn_hash_lock); | |
234 | return rv; | |
235 | } | |
236 | ||
237 | static void dn_unhash_sock(struct sock *sk) | |
238 | { | |
239 | write_lock(&dn_hash_lock); | |
240 | sk_del_node_init(sk); | |
241 | write_unlock(&dn_hash_lock); | |
242 | } | |
243 | ||
244 | static void dn_unhash_sock_bh(struct sock *sk) | |
245 | { | |
246 | write_lock_bh(&dn_hash_lock); | |
247 | sk_del_node_init(sk); | |
248 | write_unlock_bh(&dn_hash_lock); | |
249 | } | |
250 | ||
251 | static struct hlist_head *listen_hash(struct sockaddr_dn *addr) | |
252 | { | |
253 | int i; | |
95c96174 | 254 | unsigned int hash = addr->sdn_objnum; |
1da177e4 LT |
255 | |
256 | if (hash == 0) { | |
257 | hash = addr->sdn_objnamel; | |
c4106aa8 | 258 | for(i = 0; i < le16_to_cpu(addr->sdn_objnamel); i++) { |
1da177e4 LT |
259 | hash ^= addr->sdn_objname[i]; |
260 | hash ^= (hash << 3); | |
261 | } | |
262 | } | |
263 | ||
264 | return &dn_sk_hash[hash & DN_SK_HASH_MASK]; | |
265 | } | |
266 | ||
267 | /* | |
268 | * Called to transform a socket from bound (i.e. with a local address) | |
269 | * into a listening socket (doesn't need a local port number) and rehashes | |
270 | * based upon the object name/number. | |
271 | */ | |
272 | static void dn_rehash_sock(struct sock *sk) | |
273 | { | |
274 | struct hlist_head *list; | |
275 | struct dn_scp *scp = DN_SK(sk); | |
276 | ||
277 | if (scp->addr.sdn_flags & SDF_WILD) | |
278 | return; | |
279 | ||
280 | write_lock_bh(&dn_hash_lock); | |
281 | sk_del_node_init(sk); | |
282 | DN_SK(sk)->addrloc = 0; | |
283 | list = listen_hash(&DN_SK(sk)->addr); | |
284 | sk_add_node(sk, list); | |
285 | write_unlock_bh(&dn_hash_lock); | |
286 | } | |
287 | ||
288 | int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type) | |
289 | { | |
290 | int len = 2; | |
291 | ||
292 | *buf++ = type; | |
293 | ||
06f8fe11 JP |
294 | switch (type) { |
295 | case 0: | |
296 | *buf++ = sdn->sdn_objnum; | |
297 | break; | |
298 | case 1: | |
299 | *buf++ = 0; | |
300 | *buf++ = le16_to_cpu(sdn->sdn_objnamel); | |
301 | memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel)); | |
302 | len = 3 + le16_to_cpu(sdn->sdn_objnamel); | |
303 | break; | |
304 | case 2: | |
305 | memset(buf, 0, 5); | |
306 | buf += 5; | |
307 | *buf++ = le16_to_cpu(sdn->sdn_objnamel); | |
308 | memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel)); | |
309 | len = 7 + le16_to_cpu(sdn->sdn_objnamel); | |
310 | break; | |
1da177e4 LT |
311 | } |
312 | ||
313 | return len; | |
314 | } | |
315 | ||
316 | /* | |
317 | * On reception of usernames, we handle types 1 and 0 for destination | |
318 | * addresses only. Types 2 and 4 are used for source addresses, but the | |
319 | * UIC, GIC are ignored and they are both treated the same way. Type 3 | |
320 | * is never used as I've no idea what its purpose might be or what its | |
321 | * format is. | |
322 | */ | |
323 | int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt) | |
324 | { | |
325 | unsigned char type; | |
326 | int size = len; | |
327 | int namel = 12; | |
328 | ||
329 | sdn->sdn_objnum = 0; | |
c4106aa8 | 330 | sdn->sdn_objnamel = cpu_to_le16(0); |
1da177e4 LT |
331 | memset(sdn->sdn_objname, 0, DN_MAXOBJL); |
332 | ||
333 | if (len < 2) | |
334 | return -1; | |
335 | ||
336 | len -= 2; | |
337 | *fmt = *data++; | |
338 | type = *data++; | |
339 | ||
06f8fe11 JP |
340 | switch (*fmt) { |
341 | case 0: | |
342 | sdn->sdn_objnum = type; | |
343 | return 2; | |
344 | case 1: | |
345 | namel = 16; | |
346 | break; | |
347 | case 2: | |
348 | len -= 4; | |
349 | data += 4; | |
350 | break; | |
351 | case 4: | |
352 | len -= 8; | |
353 | data += 8; | |
354 | break; | |
355 | default: | |
356 | return -1; | |
1da177e4 LT |
357 | } |
358 | ||
359 | len -= 1; | |
360 | ||
361 | if (len < 0) | |
362 | return -1; | |
363 | ||
c4106aa8 HH |
364 | sdn->sdn_objnamel = cpu_to_le16(*data++); |
365 | len -= le16_to_cpu(sdn->sdn_objnamel); | |
1da177e4 | 366 | |
c4106aa8 | 367 | if ((len < 0) || (le16_to_cpu(sdn->sdn_objnamel) > namel)) |
1da177e4 LT |
368 | return -1; |
369 | ||
c4106aa8 | 370 | memcpy(sdn->sdn_objname, data, le16_to_cpu(sdn->sdn_objnamel)); |
1da177e4 LT |
371 | |
372 | return size - len; | |
373 | } | |
374 | ||
375 | struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr) | |
376 | { | |
377 | struct hlist_head *list = listen_hash(addr); | |
1da177e4 LT |
378 | struct sock *sk; |
379 | ||
380 | read_lock(&dn_hash_lock); | |
b67bfe0d | 381 | sk_for_each(sk, list) { |
1da177e4 LT |
382 | struct dn_scp *scp = DN_SK(sk); |
383 | if (sk->sk_state != TCP_LISTEN) | |
384 | continue; | |
385 | if (scp->addr.sdn_objnum) { | |
386 | if (scp->addr.sdn_objnum != addr->sdn_objnum) | |
387 | continue; | |
388 | } else { | |
389 | if (addr->sdn_objnum) | |
390 | continue; | |
391 | if (scp->addr.sdn_objnamel != addr->sdn_objnamel) | |
392 | continue; | |
c4106aa8 | 393 | if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, le16_to_cpu(addr->sdn_objnamel)) != 0) |
1da177e4 LT |
394 | continue; |
395 | } | |
396 | sock_hold(sk); | |
397 | read_unlock(&dn_hash_lock); | |
398 | return sk; | |
399 | } | |
400 | ||
401 | sk = sk_head(&dn_wild_sk); | |
402 | if (sk) { | |
429eb0fa | 403 | if (sk->sk_state == TCP_LISTEN) |
1da177e4 LT |
404 | sock_hold(sk); |
405 | else | |
406 | sk = NULL; | |
407 | } | |
408 | ||
409 | read_unlock(&dn_hash_lock); | |
410 | return sk; | |
411 | } | |
412 | ||
413 | struct sock *dn_find_by_skb(struct sk_buff *skb) | |
414 | { | |
415 | struct dn_skb_cb *cb = DN_SKB_CB(skb); | |
416 | struct sock *sk; | |
1da177e4 LT |
417 | struct dn_scp *scp; |
418 | ||
419 | read_lock(&dn_hash_lock); | |
b67bfe0d | 420 | sk_for_each(sk, &dn_sk_hash[le16_to_cpu(cb->dst_port) & DN_SK_HASH_MASK]) { |
1da177e4 LT |
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 | ||
b6c6712a | 447 | dst_release(rcu_dereference_check(sk->sk_dst_cache, 1)); |
1da177e4 LT |
448 | } |
449 | ||
1f12bcc9 SW |
450 | static int dn_memory_pressure; |
451 | ||
5c52ba17 | 452 | static void dn_enter_memory_pressure(struct sock *sk) |
1f12bcc9 SW |
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 | ||
11aa9c28 | 472 | static struct sock *dn_alloc_sock(struct net *net, struct socket *sock, gfp_t gfp, int kern) |
1da177e4 LT |
473 | { |
474 | struct dn_scp *scp; | |
11aa9c28 | 475 | struct sock *sk = sk_alloc(net, PF_DECnet, gfp, &dn_proto, kern); |
1da177e4 LT |
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; | |
28448b80 | 486 | sk->sk_no_check_tx = 1; |
1da177e4 LT |
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*/ | |
429eb0fa | 502 | scp->flowrem_sw = DN_SEND; |
1da177e4 LT |
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 | ||
06f8fe11 JP |
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; | |
1da177e4 | 582 | |
06f8fe11 JP |
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; | |
1da177e4 | 588 | |
06f8fe11 JP |
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, | |
593 | GFP_ATOMIC); | |
594 | return 0; | |
595 | } | |
1da177e4 LT |
596 | } |
597 | ||
598 | scp->persist = (HZ * decnet_time_wait); | |
599 | ||
600 | if (sk->sk_socket) | |
601 | return 0; | |
602 | ||
c0b80236 | 603 | if (time_after_eq(jiffies, scp->stamp + HZ * decnet_time_wait)) { |
1da177e4 LT |
604 | dn_unhash_sock(sk); |
605 | sock_put(sk); | |
606 | return 1; | |
607 | } | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | static void dn_destroy_sock(struct sock *sk) | |
613 | { | |
614 | struct dn_scp *scp = DN_SK(sk); | |
615 | ||
616 | scp->nsp_rxtshift = 0; /* reset back off */ | |
617 | ||
618 | if (sk->sk_socket) { | |
619 | if (sk->sk_socket->state != SS_UNCONNECTED) | |
620 | sk->sk_socket->state = SS_DISCONNECTING; | |
621 | } | |
622 | ||
623 | sk->sk_state = TCP_CLOSE; | |
624 | ||
06f8fe11 JP |
625 | switch (scp->state) { |
626 | case DN_DN: | |
627 | dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, | |
628 | sk->sk_allocation); | |
629 | scp->persist_fxn = dn_destroy_timer; | |
630 | scp->persist = dn_nsp_persist(sk); | |
631 | break; | |
632 | case DN_CR: | |
633 | scp->state = DN_DR; | |
634 | goto disc_reject; | |
635 | case DN_RUN: | |
636 | scp->state = DN_DI; | |
637 | case DN_DI: | |
638 | case DN_DR: | |
1da177e4 | 639 | disc_reject: |
06f8fe11 JP |
640 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation); |
641 | case DN_NC: | |
642 | case DN_NR: | |
643 | case DN_RJ: | |
644 | case DN_DIC: | |
645 | case DN_CN: | |
646 | case DN_DRC: | |
647 | case DN_CI: | |
648 | case DN_CD: | |
649 | scp->persist_fxn = dn_destroy_timer; | |
650 | scp->persist = dn_nsp_persist(sk); | |
651 | break; | |
652 | default: | |
653 | printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n"); | |
654 | case DN_O: | |
655 | dn_stop_slow_timer(sk); | |
1da177e4 | 656 | |
06f8fe11 JP |
657 | dn_unhash_sock_bh(sk); |
658 | sock_put(sk); | |
1da177e4 | 659 | |
06f8fe11 | 660 | break; |
1da177e4 LT |
661 | } |
662 | } | |
663 | ||
c4ea94ab | 664 | char *dn_addr2asc(__u16 addr, char *buf) |
1da177e4 LT |
665 | { |
666 | unsigned short node, area; | |
667 | ||
668 | node = addr & 0x03ff; | |
669 | area = addr >> 10; | |
670 | sprintf(buf, "%hd.%hd", area, node); | |
671 | ||
672 | return buf; | |
673 | } | |
674 | ||
675 | ||
676 | ||
3f378b68 EP |
677 | static int dn_create(struct net *net, struct socket *sock, int protocol, |
678 | int kern) | |
1da177e4 LT |
679 | { |
680 | struct sock *sk; | |
681 | ||
79462ad0 HFS |
682 | if (protocol < 0 || protocol > SK_PROTOCOL_MAX) |
683 | return -EINVAL; | |
684 | ||
09ad9bc7 | 685 | if (!net_eq(net, &init_net)) |
1b8d7ae4 EB |
686 | return -EAFNOSUPPORT; |
687 | ||
06f8fe11 JP |
688 | switch (sock->type) { |
689 | case SOCK_SEQPACKET: | |
690 | if (protocol != DNPROTO_NSP) | |
691 | return -EPROTONOSUPPORT; | |
692 | break; | |
693 | case SOCK_STREAM: | |
694 | break; | |
695 | default: | |
696 | return -ESOCKTNOSUPPORT; | |
1da177e4 LT |
697 | } |
698 | ||
699 | ||
11aa9c28 | 700 | if ((sk = dn_alloc_sock(net, sock, GFP_KERNEL, kern)) == NULL) |
1da177e4 LT |
701 | return -ENOBUFS; |
702 | ||
703 | sk->sk_protocol = protocol; | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | ||
709 | static int | |
710 | dn_release(struct socket *sock) | |
711 | { | |
712 | struct sock *sk = sock->sk; | |
713 | ||
714 | if (sk) { | |
715 | sock_orphan(sk); | |
716 | sock_hold(sk); | |
717 | lock_sock(sk); | |
718 | dn_destroy_sock(sk); | |
719 | release_sock(sk); | |
720 | sock_put(sk); | |
721 | } | |
722 | ||
429eb0fa | 723 | return 0; |
1da177e4 LT |
724 | } |
725 | ||
726 | static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
727 | { | |
728 | struct sock *sk = sock->sk; | |
729 | struct dn_scp *scp = DN_SK(sk); | |
730 | struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr; | |
7562f876 | 731 | struct net_device *dev, *ldev; |
1da177e4 LT |
732 | int rv; |
733 | ||
734 | if (addr_len != sizeof(struct sockaddr_dn)) | |
735 | return -EINVAL; | |
736 | ||
737 | if (saddr->sdn_family != AF_DECnet) | |
738 | return -EINVAL; | |
739 | ||
c4106aa8 | 740 | if (le16_to_cpu(saddr->sdn_nodeaddrl) && (le16_to_cpu(saddr->sdn_nodeaddrl) != 2)) |
1da177e4 LT |
741 | return -EINVAL; |
742 | ||
c4106aa8 | 743 | if (le16_to_cpu(saddr->sdn_objnamel) > DN_MAXOBJL) |
1da177e4 LT |
744 | return -EINVAL; |
745 | ||
746 | if (saddr->sdn_flags & ~SDF_WILD) | |
747 | return -EINVAL; | |
748 | ||
1da177e4 LT |
749 | if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum || |
750 | (saddr->sdn_flags & SDF_WILD))) | |
751 | return -EACCES; | |
1da177e4 LT |
752 | |
753 | if (!(saddr->sdn_flags & SDF_WILD)) { | |
c4106aa8 | 754 | if (le16_to_cpu(saddr->sdn_nodeaddrl)) { |
c6d14c84 | 755 | rcu_read_lock(); |
7562f876 | 756 | ldev = NULL; |
c6d14c84 | 757 | for_each_netdev_rcu(&init_net, dev) { |
1da177e4 LT |
758 | if (!dev->dn_ptr) |
759 | continue; | |
7562f876 PE |
760 | if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) { |
761 | ldev = dev; | |
1da177e4 | 762 | break; |
7562f876 | 763 | } |
1da177e4 | 764 | } |
c6d14c84 | 765 | rcu_read_unlock(); |
7562f876 | 766 | if (ldev == NULL) |
1da177e4 LT |
767 | return -EADDRNOTAVAIL; |
768 | } | |
769 | } | |
770 | ||
771 | rv = -EINVAL; | |
772 | lock_sock(sk); | |
773 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
774 | memcpy(&scp->addr, saddr, addr_len); | |
775 | sock_reset_flag(sk, SOCK_ZAPPED); | |
776 | ||
777 | rv = dn_hash_sock(sk); | |
778 | if (rv) | |
779 | sock_set_flag(sk, SOCK_ZAPPED); | |
780 | } | |
781 | release_sock(sk); | |
782 | ||
429eb0fa | 783 | return rv; |
1da177e4 LT |
784 | } |
785 | ||
786 | ||
787 | static int dn_auto_bind(struct socket *sock) | |
788 | { | |
789 | struct sock *sk = sock->sk; | |
790 | struct dn_scp *scp = DN_SK(sk); | |
791 | int rv; | |
792 | ||
793 | sock_reset_flag(sk, SOCK_ZAPPED); | |
794 | ||
795 | scp->addr.sdn_flags = 0; | |
796 | scp->addr.sdn_objnum = 0; | |
797 | ||
798 | /* | |
799 | * This stuff is to keep compatibility with Eduardo's | |
800 | * patch. I hope I can dispense with it shortly... | |
801 | */ | |
802 | if ((scp->accessdata.acc_accl != 0) && | |
803 | (scp->accessdata.acc_accl <= 12)) { | |
429eb0fa | 804 | |
c4106aa8 HH |
805 | scp->addr.sdn_objnamel = cpu_to_le16(scp->accessdata.acc_accl); |
806 | memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, le16_to_cpu(scp->addr.sdn_objnamel)); | |
1da177e4 LT |
807 | |
808 | scp->accessdata.acc_accl = 0; | |
809 | memset(scp->accessdata.acc_acc, 0, 40); | |
810 | } | |
811 | /* End of compatibility stuff */ | |
812 | ||
c4106aa8 | 813 | scp->addr.sdn_add.a_len = cpu_to_le16(2); |
c4ea94ab | 814 | rv = dn_dev_bind_default((__le16 *)scp->addr.sdn_add.a_addr); |
1da177e4 LT |
815 | if (rv == 0) { |
816 | rv = dn_hash_sock(sk); | |
817 | if (rv) | |
818 | sock_set_flag(sk, SOCK_ZAPPED); | |
819 | } | |
820 | ||
821 | return rv; | |
822 | } | |
823 | ||
dd0fc66f | 824 | static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation) |
1da177e4 LT |
825 | { |
826 | struct dn_scp *scp = DN_SK(sk); | |
827 | DEFINE_WAIT(wait); | |
828 | int err; | |
829 | ||
830 | if (scp->state != DN_CR) | |
831 | return -EINVAL; | |
832 | ||
833 | scp->state = DN_CC; | |
0dbaee3b | 834 | scp->segsize_loc = dst_metric_advmss(__sk_dst_get(sk)); |
1da177e4 LT |
835 | dn_send_conn_conf(sk, allocation); |
836 | ||
aa395145 | 837 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
838 | for(;;) { |
839 | release_sock(sk); | |
840 | if (scp->state == DN_CC) | |
841 | *timeo = schedule_timeout(*timeo); | |
842 | lock_sock(sk); | |
843 | err = 0; | |
844 | if (scp->state == DN_RUN) | |
845 | break; | |
846 | err = sock_error(sk); | |
847 | if (err) | |
848 | break; | |
849 | err = sock_intr_errno(*timeo); | |
850 | if (signal_pending(current)) | |
851 | break; | |
852 | err = -EAGAIN; | |
853 | if (!*timeo) | |
854 | break; | |
aa395145 | 855 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 856 | } |
aa395145 | 857 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
858 | if (err == 0) { |
859 | sk->sk_socket->state = SS_CONNECTED; | |
860 | } else if (scp->state != DN_CC) { | |
861 | sk->sk_socket->state = SS_UNCONNECTED; | |
862 | } | |
863 | return err; | |
864 | } | |
865 | ||
866 | static int dn_wait_run(struct sock *sk, long *timeo) | |
867 | { | |
868 | struct dn_scp *scp = DN_SK(sk); | |
869 | DEFINE_WAIT(wait); | |
870 | int err = 0; | |
871 | ||
872 | if (scp->state == DN_RUN) | |
873 | goto out; | |
874 | ||
875 | if (!*timeo) | |
876 | return -EALREADY; | |
877 | ||
aa395145 | 878 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
879 | for(;;) { |
880 | release_sock(sk); | |
881 | if (scp->state == DN_CI || scp->state == DN_CC) | |
882 | *timeo = schedule_timeout(*timeo); | |
883 | lock_sock(sk); | |
884 | err = 0; | |
885 | if (scp->state == DN_RUN) | |
886 | break; | |
887 | err = sock_error(sk); | |
888 | if (err) | |
889 | break; | |
890 | err = sock_intr_errno(*timeo); | |
891 | if (signal_pending(current)) | |
892 | break; | |
893 | err = -ETIMEDOUT; | |
894 | if (!*timeo) | |
895 | break; | |
aa395145 | 896 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 897 | } |
aa395145 | 898 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
899 | out: |
900 | if (err == 0) { | |
901 | sk->sk_socket->state = SS_CONNECTED; | |
902 | } else if (scp->state != DN_CI && scp->state != DN_CC) { | |
903 | sk->sk_socket->state = SS_UNCONNECTED; | |
904 | } | |
905 | return err; | |
906 | } | |
907 | ||
908 | static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) | |
909 | { | |
910 | struct socket *sock = sk->sk_socket; | |
911 | struct dn_scp *scp = DN_SK(sk); | |
912 | int err = -EISCONN; | |
bef55aeb | 913 | struct flowidn fld; |
cec771d6 | 914 | struct dst_entry *dst; |
1da177e4 LT |
915 | |
916 | if (sock->state == SS_CONNECTED) | |
917 | goto out; | |
918 | ||
919 | if (sock->state == SS_CONNECTING) { | |
920 | err = 0; | |
921 | if (scp->state == DN_RUN) { | |
922 | sock->state = SS_CONNECTED; | |
923 | goto out; | |
924 | } | |
925 | err = -ECONNREFUSED; | |
926 | if (scp->state != DN_CI && scp->state != DN_CC) { | |
927 | sock->state = SS_UNCONNECTED; | |
928 | goto out; | |
929 | } | |
930 | return dn_wait_run(sk, timeo); | |
931 | } | |
932 | ||
933 | err = -EINVAL; | |
934 | if (scp->state != DN_O) | |
935 | goto out; | |
936 | ||
937 | if (addr == NULL || addrlen != sizeof(struct sockaddr_dn)) | |
938 | goto out; | |
939 | if (addr->sdn_family != AF_DECnet) | |
940 | goto out; | |
941 | if (addr->sdn_flags & SDF_WILD) | |
942 | goto out; | |
943 | ||
944 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
945 | err = dn_auto_bind(sk->sk_socket); | |
946 | if (err) | |
947 | goto out; | |
948 | } | |
949 | ||
950 | memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn)); | |
951 | ||
952 | err = -EHOSTUNREACH; | |
bef55aeb DM |
953 | memset(&fld, 0, sizeof(fld)); |
954 | fld.flowidn_oif = sk->sk_bound_dev_if; | |
955 | fld.daddr = dn_saddr2dn(&scp->peer); | |
956 | fld.saddr = dn_saddr2dn(&scp->addr); | |
957 | dn_sk_ports_copy(&fld, scp); | |
958 | fld.flowidn_proto = DNPROTO_NSP; | |
959 | if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, flags) < 0) | |
1da177e4 | 960 | goto out; |
cec771d6 CW |
961 | dst = __sk_dst_get(sk); |
962 | sk->sk_route_caps = dst->dev->features; | |
1da177e4 LT |
963 | sock->state = SS_CONNECTING; |
964 | scp->state = DN_CI; | |
cec771d6 | 965 | scp->segsize_loc = dst_metric_advmss(dst); |
1da177e4 LT |
966 | |
967 | dn_nsp_send_conninit(sk, NSP_CI); | |
968 | err = -EINPROGRESS; | |
969 | if (*timeo) { | |
970 | err = dn_wait_run(sk, timeo); | |
971 | } | |
972 | out: | |
973 | return err; | |
974 | } | |
975 | ||
976 | static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags) | |
977 | { | |
978 | struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr; | |
979 | struct sock *sk = sock->sk; | |
980 | int err; | |
981 | long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); | |
982 | ||
983 | lock_sock(sk); | |
984 | err = __dn_connect(sk, addr, addrlen, &timeo, 0); | |
985 | release_sock(sk); | |
986 | ||
987 | return err; | |
988 | } | |
989 | ||
990 | static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) | |
991 | { | |
992 | struct dn_scp *scp = DN_SK(sk); | |
993 | ||
06f8fe11 JP |
994 | switch (scp->state) { |
995 | case DN_RUN: | |
996 | return 0; | |
997 | case DN_CR: | |
998 | return dn_confirm_accept(sk, timeo, sk->sk_allocation); | |
999 | case DN_CI: | |
1000 | case DN_CC: | |
1001 | return dn_wait_run(sk, timeo); | |
1002 | case DN_O: | |
1003 | return __dn_connect(sk, addr, addrlen, timeo, flags); | |
1da177e4 LT |
1004 | } |
1005 | ||
1006 | return -EINVAL; | |
1007 | } | |
1008 | ||
1009 | ||
1010 | static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc) | |
1011 | { | |
429eb0fa | 1012 | unsigned char *ptr = skb->data; |
1da177e4 | 1013 | |
429eb0fa YH |
1014 | acc->acc_userl = *ptr++; |
1015 | memcpy(&acc->acc_user, ptr, acc->acc_userl); | |
1016 | ptr += acc->acc_userl; | |
1da177e4 | 1017 | |
429eb0fa YH |
1018 | acc->acc_passl = *ptr++; |
1019 | memcpy(&acc->acc_pass, ptr, acc->acc_passl); | |
1020 | ptr += acc->acc_passl; | |
1da177e4 | 1021 | |
429eb0fa YH |
1022 | acc->acc_accl = *ptr++; |
1023 | memcpy(&acc->acc_acc, ptr, acc->acc_accl); | |
1da177e4 | 1024 | |
429eb0fa | 1025 | skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3); |
1da177e4 LT |
1026 | |
1027 | } | |
1028 | ||
1029 | static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt) | |
1030 | { | |
375d9d71 SW |
1031 | unsigned char *ptr = skb->data; |
1032 | u16 len = *ptr++; /* yes, it's 8bit on the wire */ | |
1033 | ||
1034 | BUG_ON(len > 16); /* we've checked the contents earlier */ | |
c4106aa8 | 1035 | opt->opt_optl = cpu_to_le16(len); |
375d9d71 SW |
1036 | opt->opt_status = 0; |
1037 | memcpy(opt->opt_data, ptr, len); | |
1038 | skb_pull(skb, len + 1); | |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo) | |
1042 | { | |
1043 | DEFINE_WAIT(wait); | |
1044 | struct sk_buff *skb = NULL; | |
1045 | int err = 0; | |
1046 | ||
aa395145 | 1047 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
1048 | for(;;) { |
1049 | release_sock(sk); | |
1050 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1051 | if (skb == NULL) { | |
1052 | *timeo = schedule_timeout(*timeo); | |
1053 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1054 | } | |
1055 | lock_sock(sk); | |
1056 | if (skb != NULL) | |
1057 | break; | |
1058 | err = -EINVAL; | |
1059 | if (sk->sk_state != TCP_LISTEN) | |
1060 | break; | |
1061 | err = sock_intr_errno(*timeo); | |
1062 | if (signal_pending(current)) | |
1063 | break; | |
1064 | err = -EAGAIN; | |
1065 | if (!*timeo) | |
1066 | break; | |
aa395145 | 1067 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 1068 | } |
aa395145 | 1069 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
1070 | |
1071 | return skb == NULL ? ERR_PTR(err) : skb; | |
1072 | } | |
1073 | ||
cdfbabfb DH |
1074 | static int dn_accept(struct socket *sock, struct socket *newsock, int flags, |
1075 | bool kern) | |
1da177e4 LT |
1076 | { |
1077 | struct sock *sk = sock->sk, *newsk; | |
1078 | struct sk_buff *skb = NULL; | |
1079 | struct dn_skb_cb *cb; | |
1080 | unsigned char menuver; | |
1081 | int err = 0; | |
1082 | unsigned char type; | |
1083 | long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); | |
adf30907 | 1084 | struct dst_entry *dst; |
1da177e4 LT |
1085 | |
1086 | lock_sock(sk); | |
1087 | ||
429eb0fa | 1088 | if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) { |
1da177e4 LT |
1089 | release_sock(sk); |
1090 | return -EINVAL; | |
1091 | } | |
1092 | ||
1093 | skb = skb_dequeue(&sk->sk_receive_queue); | |
1094 | if (skb == NULL) { | |
1095 | skb = dn_wait_for_connect(sk, &timeo); | |
1096 | if (IS_ERR(skb)) { | |
1097 | release_sock(sk); | |
1098 | return PTR_ERR(skb); | |
1099 | } | |
1100 | } | |
1101 | ||
1102 | cb = DN_SKB_CB(skb); | |
1103 | sk->sk_ack_backlog--; | |
cdfbabfb | 1104 | newsk = dn_alloc_sock(sock_net(sk), newsock, sk->sk_allocation, kern); |
1da177e4 LT |
1105 | if (newsk == NULL) { |
1106 | release_sock(sk); | |
1107 | kfree_skb(skb); | |
1108 | return -ENOBUFS; | |
1109 | } | |
1110 | release_sock(sk); | |
1111 | ||
adf30907 | 1112 | dst = skb_dst(skb); |
b6c6712a | 1113 | sk_dst_set(newsk, dst); |
adf30907 | 1114 | skb_dst_set(skb, NULL); |
1da177e4 | 1115 | |
429eb0fa | 1116 | DN_SK(newsk)->state = DN_CR; |
1da177e4 LT |
1117 | DN_SK(newsk)->addrrem = cb->src_port; |
1118 | DN_SK(newsk)->services_rem = cb->services; | |
1119 | DN_SK(newsk)->info_rem = cb->info; | |
1120 | DN_SK(newsk)->segsize_rem = cb->segsize; | |
1121 | DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode; | |
429eb0fa | 1122 | |
1da177e4 LT |
1123 | if (DN_SK(newsk)->segsize_rem < 230) |
1124 | DN_SK(newsk)->segsize_rem = 230; | |
1125 | ||
1126 | if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE) | |
1127 | DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd; | |
1128 | ||
1129 | newsk->sk_state = TCP_LISTEN; | |
1130 | memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn)); | |
1131 | ||
1132 | /* | |
1133 | * If we are listening on a wild socket, we don't want | |
1134 | * the newly created socket on the wrong hash queue. | |
1135 | */ | |
1136 | DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD; | |
1137 | ||
1138 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type)); | |
1139 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type)); | |
c4ea94ab SW |
1140 | *(__le16 *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src; |
1141 | *(__le16 *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst; | |
1da177e4 LT |
1142 | |
1143 | menuver = *skb->data; | |
1144 | skb_pull(skb, 1); | |
1145 | ||
1146 | if (menuver & DN_MENUVER_ACC) | |
1147 | dn_access_copy(skb, &(DN_SK(newsk)->accessdata)); | |
1148 | ||
1149 | if (menuver & DN_MENUVER_USR) | |
1150 | dn_user_copy(skb, &(DN_SK(newsk)->conndata_in)); | |
1151 | ||
1152 | if (menuver & DN_MENUVER_PRX) | |
1153 | DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY; | |
1154 | ||
1155 | if (menuver & DN_MENUVER_UIC) | |
1156 | DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY; | |
1157 | ||
1158 | kfree_skb(skb); | |
1159 | ||
1160 | memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out), | |
1161 | sizeof(struct optdata_dn)); | |
1162 | memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out), | |
1163 | sizeof(struct optdata_dn)); | |
1164 | ||
1165 | lock_sock(newsk); | |
1166 | err = dn_hash_sock(newsk); | |
1167 | if (err == 0) { | |
1168 | sock_reset_flag(newsk, SOCK_ZAPPED); | |
1169 | dn_send_conn_ack(newsk); | |
1170 | ||
1171 | /* | |
429eb0fa YH |
1172 | * Here we use sk->sk_allocation since although the conn conf is |
1173 | * for the newsk, the context is the old socket. | |
1174 | */ | |
1da177e4 LT |
1175 | if (DN_SK(newsk)->accept_mode == ACC_IMMED) |
1176 | err = dn_confirm_accept(newsk, &timeo, | |
1177 | sk->sk_allocation); | |
1178 | } | |
1179 | release_sock(newsk); | |
429eb0fa | 1180 | return err; |
1da177e4 LT |
1181 | } |
1182 | ||
1183 | ||
1184 | static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int *uaddr_len,int peer) | |
1185 | { | |
1186 | struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr; | |
1187 | struct sock *sk = sock->sk; | |
1188 | struct dn_scp *scp = DN_SK(sk); | |
1189 | ||
1190 | *uaddr_len = sizeof(struct sockaddr_dn); | |
1191 | ||
1192 | lock_sock(sk); | |
1193 | ||
1194 | if (peer) { | |
429eb0fa YH |
1195 | if ((sock->state != SS_CONNECTED && |
1196 | sock->state != SS_CONNECTING) && | |
52c41a32 | 1197 | scp->accept_mode == ACC_IMMED) { |
429eb0fa | 1198 | release_sock(sk); |
1da177e4 | 1199 | return -ENOTCONN; |
52c41a32 | 1200 | } |
1da177e4 LT |
1201 | |
1202 | memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn)); | |
1203 | } else { | |
1204 | memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn)); | |
1205 | } | |
1206 | ||
1207 | release_sock(sk); | |
1208 | ||
429eb0fa | 1209 | return 0; |
1da177e4 LT |
1210 | } |
1211 | ||
1212 | ||
1213 | static unsigned int dn_poll(struct file *file, struct socket *sock, poll_table *wait) | |
1214 | { | |
1215 | struct sock *sk = sock->sk; | |
1216 | struct dn_scp *scp = DN_SK(sk); | |
1217 | int mask = datagram_poll(file, sock, wait); | |
1218 | ||
b03efcfb | 1219 | if (!skb_queue_empty(&scp->other_receive_queue)) |
1da177e4 LT |
1220 | mask |= POLLRDBAND; |
1221 | ||
1222 | return mask; | |
1223 | } | |
1224 | ||
1225 | static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1226 | { | |
1227 | struct sock *sk = sock->sk; | |
1228 | struct dn_scp *scp = DN_SK(sk); | |
1229 | int err = -EOPNOTSUPP; | |
1230 | long amount = 0; | |
1231 | struct sk_buff *skb; | |
1232 | int val; | |
1233 | ||
1234 | switch(cmd) | |
1235 | { | |
1236 | case SIOCGIFADDR: | |
1237 | case SIOCSIFADDR: | |
1238 | return dn_dev_ioctl(cmd, (void __user *)arg); | |
1239 | ||
1240 | case SIOCATMARK: | |
1241 | lock_sock(sk); | |
b03efcfb | 1242 | val = !skb_queue_empty(&scp->other_receive_queue); |
1da177e4 LT |
1243 | if (scp->state != DN_RUN) |
1244 | val = -ENOTCONN; | |
1245 | release_sock(sk); | |
1246 | return val; | |
1247 | ||
1248 | case TIOCOUTQ: | |
31e6d363 | 1249 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
1da177e4 LT |
1250 | if (amount < 0) |
1251 | amount = 0; | |
1252 | err = put_user(amount, (int __user *)arg); | |
1253 | break; | |
1254 | ||
1255 | case TIOCINQ: | |
1256 | lock_sock(sk); | |
e57c624b HE |
1257 | skb = skb_peek(&scp->other_receive_queue); |
1258 | if (skb) { | |
1da177e4 LT |
1259 | amount = skb->len; |
1260 | } else { | |
bec571ec | 1261 | skb_queue_walk(&sk->sk_receive_queue, skb) |
1da177e4 | 1262 | amount += skb->len; |
1da177e4 LT |
1263 | } |
1264 | release_sock(sk); | |
1265 | err = put_user(amount, (int __user *)arg); | |
1266 | break; | |
1267 | ||
1268 | default: | |
b5e5fa5e | 1269 | err = -ENOIOCTLCMD; |
1da177e4 LT |
1270 | break; |
1271 | } | |
1272 | ||
1273 | return err; | |
1274 | } | |
1275 | ||
1276 | static int dn_listen(struct socket *sock, int backlog) | |
1277 | { | |
1278 | struct sock *sk = sock->sk; | |
1279 | int err = -EINVAL; | |
1280 | ||
1281 | lock_sock(sk); | |
1282 | ||
1283 | if (sock_flag(sk, SOCK_ZAPPED)) | |
1284 | goto out; | |
1285 | ||
1286 | if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN)) | |
1287 | goto out; | |
1288 | ||
1289 | sk->sk_max_ack_backlog = backlog; | |
1290 | sk->sk_ack_backlog = 0; | |
1291 | sk->sk_state = TCP_LISTEN; | |
1292 | err = 0; | |
1293 | dn_rehash_sock(sk); | |
1294 | ||
1295 | out: | |
1296 | release_sock(sk); | |
1297 | ||
429eb0fa | 1298 | return err; |
1da177e4 LT |
1299 | } |
1300 | ||
1301 | ||
1302 | static int dn_shutdown(struct socket *sock, int how) | |
1303 | { | |
1304 | struct sock *sk = sock->sk; | |
1305 | struct dn_scp *scp = DN_SK(sk); | |
1306 | int err = -ENOTCONN; | |
1307 | ||
1308 | lock_sock(sk); | |
1309 | ||
1310 | if (sock->state == SS_UNCONNECTED) | |
1311 | goto out; | |
1312 | ||
1313 | err = 0; | |
1314 | if (sock->state == SS_DISCONNECTING) | |
1315 | goto out; | |
1316 | ||
1317 | err = -EINVAL; | |
1318 | if (scp->state == DN_O) | |
1319 | goto out; | |
1320 | ||
46b66d70 | 1321 | if (how != SHUT_RDWR) |
1da177e4 LT |
1322 | goto out; |
1323 | ||
46b66d70 | 1324 | sk->sk_shutdown = SHUTDOWN_MASK; |
1da177e4 LT |
1325 | dn_destroy_sock(sk); |
1326 | err = 0; | |
1327 | ||
1328 | out: | |
1329 | release_sock(sk); | |
1330 | ||
1331 | return err; | |
1332 | } | |
1333 | ||
b7058842 | 1334 | static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
1da177e4 LT |
1335 | { |
1336 | struct sock *sk = sock->sk; | |
1337 | int err; | |
1338 | ||
1339 | lock_sock(sk); | |
1340 | err = __dn_setsockopt(sock, level, optname, optval, optlen, 0); | |
1341 | release_sock(sk); | |
1342 | ||
1343 | return err; | |
1344 | } | |
1345 | ||
b7058842 | 1346 | static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, unsigned int optlen, int flags) |
1da177e4 LT |
1347 | { |
1348 | struct sock *sk = sock->sk; | |
1349 | struct dn_scp *scp = DN_SK(sk); | |
1350 | long timeo; | |
1351 | union { | |
1352 | struct optdata_dn opt; | |
1353 | struct accessdata_dn acc; | |
1354 | int mode; | |
1355 | unsigned long win; | |
1356 | int val; | |
1357 | unsigned char services; | |
1358 | unsigned char info; | |
1359 | } u; | |
1360 | int err; | |
1361 | ||
1362 | if (optlen && !optval) | |
1363 | return -EINVAL; | |
1364 | ||
1365 | if (optlen > sizeof(u)) | |
1366 | return -EINVAL; | |
1367 | ||
1368 | if (copy_from_user(&u, optval, optlen)) | |
1369 | return -EFAULT; | |
1370 | ||
06f8fe11 JP |
1371 | switch (optname) { |
1372 | case DSO_CONDATA: | |
1373 | if (sock->state == SS_CONNECTED) | |
1374 | return -EISCONN; | |
1375 | if ((scp->state != DN_O) && (scp->state != DN_CR)) | |
1376 | return -EINVAL; | |
1da177e4 | 1377 | |
06f8fe11 JP |
1378 | if (optlen != sizeof(struct optdata_dn)) |
1379 | return -EINVAL; | |
1da177e4 | 1380 | |
06f8fe11 JP |
1381 | if (le16_to_cpu(u.opt.opt_optl) > 16) |
1382 | return -EINVAL; | |
1da177e4 | 1383 | |
06f8fe11 JP |
1384 | memcpy(&scp->conndata_out, &u.opt, optlen); |
1385 | break; | |
1da177e4 | 1386 | |
06f8fe11 JP |
1387 | case DSO_DISDATA: |
1388 | if (sock->state != SS_CONNECTED && | |
1389 | scp->accept_mode == ACC_IMMED) | |
1390 | return -ENOTCONN; | |
1da177e4 | 1391 | |
06f8fe11 JP |
1392 | if (optlen != sizeof(struct optdata_dn)) |
1393 | return -EINVAL; | |
1da177e4 | 1394 | |
06f8fe11 JP |
1395 | if (le16_to_cpu(u.opt.opt_optl) > 16) |
1396 | return -EINVAL; | |
1da177e4 | 1397 | |
06f8fe11 JP |
1398 | memcpy(&scp->discdata_out, &u.opt, optlen); |
1399 | break; | |
1da177e4 | 1400 | |
06f8fe11 JP |
1401 | case DSO_CONACCESS: |
1402 | if (sock->state == SS_CONNECTED) | |
1403 | return -EISCONN; | |
1404 | if (scp->state != DN_O) | |
1405 | return -EINVAL; | |
1da177e4 | 1406 | |
06f8fe11 JP |
1407 | if (optlen != sizeof(struct accessdata_dn)) |
1408 | return -EINVAL; | |
1da177e4 | 1409 | |
06f8fe11 JP |
1410 | if ((u.acc.acc_accl > DN_MAXACCL) || |
1411 | (u.acc.acc_passl > DN_MAXACCL) || | |
1412 | (u.acc.acc_userl > DN_MAXACCL)) | |
1413 | return -EINVAL; | |
1da177e4 | 1414 | |
06f8fe11 JP |
1415 | memcpy(&scp->accessdata, &u.acc, optlen); |
1416 | break; | |
1da177e4 | 1417 | |
06f8fe11 JP |
1418 | case DSO_ACCEPTMODE: |
1419 | if (sock->state == SS_CONNECTED) | |
1420 | return -EISCONN; | |
1421 | if (scp->state != DN_O) | |
1422 | return -EINVAL; | |
1da177e4 | 1423 | |
06f8fe11 JP |
1424 | if (optlen != sizeof(int)) |
1425 | return -EINVAL; | |
1da177e4 | 1426 | |
06f8fe11 JP |
1427 | if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER)) |
1428 | return -EINVAL; | |
1da177e4 | 1429 | |
06f8fe11 JP |
1430 | scp->accept_mode = (unsigned char)u.mode; |
1431 | break; | |
1da177e4 | 1432 | |
06f8fe11 JP |
1433 | case DSO_CONACCEPT: |
1434 | if (scp->state != DN_CR) | |
1435 | return -EINVAL; | |
1436 | timeo = sock_rcvtimeo(sk, 0); | |
1437 | err = dn_confirm_accept(sk, &timeo, sk->sk_allocation); | |
1438 | return err; | |
1da177e4 | 1439 | |
06f8fe11 JP |
1440 | case DSO_CONREJECT: |
1441 | if (scp->state != DN_CR) | |
1442 | return -EINVAL; | |
1da177e4 | 1443 | |
06f8fe11 JP |
1444 | scp->state = DN_DR; |
1445 | sk->sk_shutdown = SHUTDOWN_MASK; | |
1446 | dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation); | |
1447 | break; | |
1da177e4 | 1448 | |
06f8fe11 | 1449 | default: |
1da177e4 LT |
1450 | #ifdef CONFIG_NETFILTER |
1451 | return nf_setsockopt(sk, PF_DECnet, optname, optval, optlen); | |
1452 | #endif | |
06f8fe11 JP |
1453 | case DSO_LINKINFO: |
1454 | case DSO_STREAM: | |
1455 | case DSO_SEQPACKET: | |
1456 | return -ENOPROTOOPT; | |
1457 | ||
1458 | case DSO_MAXWINDOW: | |
1459 | if (optlen != sizeof(unsigned long)) | |
1460 | return -EINVAL; | |
1461 | if (u.win > NSP_MAX_WINDOW) | |
1462 | u.win = NSP_MAX_WINDOW; | |
1463 | if (u.win == 0) | |
1464 | return -EINVAL; | |
1465 | scp->max_window = u.win; | |
1466 | if (scp->snd_window > u.win) | |
1467 | scp->snd_window = u.win; | |
1468 | break; | |
1da177e4 | 1469 | |
06f8fe11 JP |
1470 | case DSO_NODELAY: |
1471 | if (optlen != sizeof(int)) | |
1472 | return -EINVAL; | |
9c28286b | 1473 | if (scp->nonagle == TCP_NAGLE_CORK) |
06f8fe11 | 1474 | return -EINVAL; |
9c28286b | 1475 | scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_OFF; |
06f8fe11 JP |
1476 | /* if (scp->nonagle == 1) { Push pending frames } */ |
1477 | break; | |
1da177e4 | 1478 | |
06f8fe11 JP |
1479 | case DSO_CORK: |
1480 | if (optlen != sizeof(int)) | |
1481 | return -EINVAL; | |
9c28286b | 1482 | if (scp->nonagle == TCP_NAGLE_OFF) |
06f8fe11 | 1483 | return -EINVAL; |
9c28286b | 1484 | scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_CORK; |
06f8fe11 JP |
1485 | /* if (scp->nonagle == 0) { Push pending frames } */ |
1486 | break; | |
1da177e4 | 1487 | |
06f8fe11 JP |
1488 | case DSO_SERVICES: |
1489 | if (optlen != sizeof(unsigned char)) | |
1490 | return -EINVAL; | |
1491 | if ((u.services & ~NSP_FC_MASK) != 0x01) | |
1492 | return -EINVAL; | |
1493 | if ((u.services & NSP_FC_MASK) == NSP_FC_MASK) | |
1494 | return -EINVAL; | |
1495 | scp->services_loc = u.services; | |
1496 | break; | |
1da177e4 | 1497 | |
06f8fe11 JP |
1498 | case DSO_INFO: |
1499 | if (optlen != sizeof(unsigned char)) | |
1500 | return -EINVAL; | |
1501 | if (u.info & 0xfc) | |
1502 | return -EINVAL; | |
1503 | scp->info_loc = u.info; | |
1504 | break; | |
1da177e4 LT |
1505 | } |
1506 | ||
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) | |
1511 | { | |
1512 | struct sock *sk = sock->sk; | |
1513 | int err; | |
1514 | ||
1515 | lock_sock(sk); | |
1516 | err = __dn_getsockopt(sock, level, optname, optval, optlen, 0); | |
1517 | release_sock(sk); | |
1518 | ||
1519 | return err; | |
1520 | } | |
1521 | ||
1522 | static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags) | |
1523 | { | |
1524 | struct sock *sk = sock->sk; | |
1525 | struct dn_scp *scp = DN_SK(sk); | |
1526 | struct linkinfo_dn link; | |
1527 | unsigned int r_len; | |
1528 | void *r_data = NULL; | |
1529 | unsigned int val; | |
1530 | ||
1531 | if(get_user(r_len , optlen)) | |
1532 | return -EFAULT; | |
429eb0fa | 1533 | |
06f8fe11 JP |
1534 | switch (optname) { |
1535 | case DSO_CONDATA: | |
1536 | if (r_len > sizeof(struct optdata_dn)) | |
1537 | r_len = sizeof(struct optdata_dn); | |
1538 | r_data = &scp->conndata_in; | |
1539 | break; | |
1da177e4 | 1540 | |
06f8fe11 JP |
1541 | case DSO_DISDATA: |
1542 | if (r_len > sizeof(struct optdata_dn)) | |
1543 | r_len = sizeof(struct optdata_dn); | |
1544 | r_data = &scp->discdata_in; | |
1545 | break; | |
1da177e4 | 1546 | |
06f8fe11 JP |
1547 | case DSO_CONACCESS: |
1548 | if (r_len > sizeof(struct accessdata_dn)) | |
1549 | r_len = sizeof(struct accessdata_dn); | |
1550 | r_data = &scp->accessdata; | |
1551 | break; | |
1da177e4 | 1552 | |
06f8fe11 JP |
1553 | case DSO_ACCEPTMODE: |
1554 | if (r_len > sizeof(unsigned char)) | |
1555 | r_len = sizeof(unsigned char); | |
1556 | r_data = &scp->accept_mode; | |
1557 | break; | |
1da177e4 | 1558 | |
06f8fe11 JP |
1559 | case DSO_LINKINFO: |
1560 | if (r_len > sizeof(struct linkinfo_dn)) | |
1561 | r_len = sizeof(struct linkinfo_dn); | |
3c6f27bf | 1562 | |
06f8fe11 | 1563 | memset(&link, 0, sizeof(link)); |
1da177e4 | 1564 | |
06f8fe11 JP |
1565 | switch (sock->state) { |
1566 | case SS_CONNECTING: | |
1567 | link.idn_linkstate = LL_CONNECTING; | |
1568 | break; | |
1569 | case SS_DISCONNECTING: | |
1570 | link.idn_linkstate = LL_DISCONNECTING; | |
1571 | break; | |
1572 | case SS_CONNECTED: | |
1573 | link.idn_linkstate = LL_RUNNING; | |
1da177e4 | 1574 | break; |
1da177e4 | 1575 | default: |
06f8fe11 JP |
1576 | link.idn_linkstate = LL_INACTIVE; |
1577 | } | |
1578 | ||
1579 | link.idn_segsize = scp->segsize_rem; | |
1580 | r_data = &link; | |
1581 | break; | |
1582 | ||
1583 | default: | |
1da177e4 | 1584 | #ifdef CONFIG_NETFILTER |
06f8fe11 JP |
1585 | { |
1586 | int ret, len; | |
429eb0fa | 1587 | |
06f8fe11 JP |
1588 | if (get_user(len, optlen)) |
1589 | return -EFAULT; | |
429eb0fa | 1590 | |
06f8fe11 JP |
1591 | ret = nf_getsockopt(sk, PF_DECnet, optname, optval, &len); |
1592 | if (ret >= 0) | |
1593 | ret = put_user(len, optlen); | |
1594 | return ret; | |
1595 | } | |
1da177e4 | 1596 | #endif |
06f8fe11 JP |
1597 | case DSO_STREAM: |
1598 | case DSO_SEQPACKET: | |
1599 | case DSO_CONACCEPT: | |
1600 | case DSO_CONREJECT: | |
1601 | return -ENOPROTOOPT; | |
1602 | ||
1603 | case DSO_MAXWINDOW: | |
1604 | if (r_len > sizeof(unsigned long)) | |
1605 | r_len = sizeof(unsigned long); | |
1606 | r_data = &scp->max_window; | |
1607 | break; | |
1da177e4 | 1608 | |
06f8fe11 JP |
1609 | case DSO_NODELAY: |
1610 | if (r_len > sizeof(int)) | |
1611 | r_len = sizeof(int); | |
9c28286b | 1612 | val = (scp->nonagle == TCP_NAGLE_OFF); |
06f8fe11 JP |
1613 | r_data = &val; |
1614 | break; | |
1da177e4 | 1615 | |
06f8fe11 JP |
1616 | case DSO_CORK: |
1617 | if (r_len > sizeof(int)) | |
1618 | r_len = sizeof(int); | |
9c28286b | 1619 | val = (scp->nonagle == TCP_NAGLE_CORK); |
06f8fe11 JP |
1620 | r_data = &val; |
1621 | break; | |
1da177e4 | 1622 | |
06f8fe11 JP |
1623 | case DSO_SERVICES: |
1624 | if (r_len > sizeof(unsigned char)) | |
1625 | r_len = sizeof(unsigned char); | |
1626 | r_data = &scp->services_rem; | |
1627 | break; | |
1da177e4 | 1628 | |
06f8fe11 JP |
1629 | case DSO_INFO: |
1630 | if (r_len > sizeof(unsigned char)) | |
1631 | r_len = sizeof(unsigned char); | |
1632 | r_data = &scp->info_rem; | |
1633 | break; | |
1da177e4 LT |
1634 | } |
1635 | ||
1636 | if (r_data) { | |
1637 | if (copy_to_user(optval, r_data, r_len)) | |
1638 | return -EFAULT; | |
1639 | if (put_user(r_len, optlen)) | |
1640 | return -EFAULT; | |
1641 | } | |
1642 | ||
1643 | return 0; | |
1644 | } | |
1645 | ||
1646 | ||
1647 | static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target) | |
1648 | { | |
bec571ec | 1649 | struct sk_buff *skb; |
1da177e4 LT |
1650 | int len = 0; |
1651 | ||
1652 | if (flags & MSG_OOB) | |
b03efcfb | 1653 | return !skb_queue_empty(q) ? 1 : 0; |
1da177e4 | 1654 | |
bec571ec | 1655 | skb_queue_walk(q, skb) { |
1da177e4 LT |
1656 | struct dn_skb_cb *cb = DN_SKB_CB(skb); |
1657 | len += skb->len; | |
1658 | ||
1659 | if (cb->nsp_flags & 0x40) { | |
1660 | /* SOCK_SEQPACKET reads to EOM */ | |
1661 | if (sk->sk_type == SOCK_SEQPACKET) | |
1662 | return 1; | |
1663 | /* so does SOCK_STREAM unless WAITALL is specified */ | |
1664 | if (!(flags & MSG_WAITALL)) | |
1665 | return 1; | |
1666 | } | |
1667 | ||
1668 | /* minimum data length for read exceeded */ | |
1669 | if (len >= target) | |
1670 | return 1; | |
1da177e4 LT |
1671 | } |
1672 | ||
1673 | return 0; | |
1674 | } | |
1675 | ||
1676 | ||
1b784140 YX |
1677 | static int dn_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
1678 | int flags) | |
1da177e4 LT |
1679 | { |
1680 | struct sock *sk = sock->sk; | |
1681 | struct dn_scp *scp = DN_SK(sk); | |
1682 | struct sk_buff_head *queue = &sk->sk_receive_queue; | |
1683 | size_t target = size > 1 ? 1 : 0; | |
1684 | size_t copied = 0; | |
1685 | int rv = 0; | |
bec571ec | 1686 | struct sk_buff *skb, *n; |
1da177e4 LT |
1687 | struct dn_skb_cb *cb = NULL; |
1688 | unsigned char eor = 0; | |
1689 | long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); | |
1690 | ||
1691 | lock_sock(sk); | |
1692 | ||
1693 | if (sock_flag(sk, SOCK_ZAPPED)) { | |
1694 | rv = -EADDRNOTAVAIL; | |
1695 | goto out; | |
1696 | } | |
1697 | ||
1da177e4 | 1698 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
9eb5c94e | 1699 | rv = 0; |
1da177e4 LT |
1700 | goto out; |
1701 | } | |
1702 | ||
9eb5c94e PC |
1703 | rv = dn_check_state(sk, NULL, 0, &timeo, flags); |
1704 | if (rv) | |
1705 | goto out; | |
1706 | ||
c60992db | 1707 | if (flags & ~(MSG_CMSG_COMPAT|MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) { |
1da177e4 LT |
1708 | rv = -EOPNOTSUPP; |
1709 | goto out; | |
1710 | } | |
1711 | ||
1712 | if (flags & MSG_OOB) | |
1713 | queue = &scp->other_receive_queue; | |
1714 | ||
1715 | if (flags & MSG_WAITALL) | |
1716 | target = size; | |
1717 | ||
1718 | ||
1719 | /* | |
1720 | * See if there is data ready to read, sleep if there isn't | |
1721 | */ | |
1722 | for(;;) { | |
d9dc8b0f | 1723 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
22196d36 | 1724 | |
1da177e4 LT |
1725 | if (sk->sk_err) |
1726 | goto out; | |
1727 | ||
b03efcfb | 1728 | if (!skb_queue_empty(&scp->other_receive_queue)) { |
1da177e4 LT |
1729 | if (!(flags & MSG_OOB)) { |
1730 | msg->msg_flags |= MSG_OOB; | |
1731 | if (!scp->other_report) { | |
1732 | scp->other_report = 1; | |
1733 | goto out; | |
1734 | } | |
1735 | } | |
1736 | } | |
429eb0fa | 1737 | |
1da177e4 LT |
1738 | if (scp->state != DN_RUN) |
1739 | goto out; | |
1740 | ||
1741 | if (signal_pending(current)) { | |
1742 | rv = sock_intr_errno(timeo); | |
1743 | goto out; | |
1744 | } | |
1745 | ||
1746 | if (dn_data_ready(sk, queue, flags, target)) | |
1747 | break; | |
1748 | ||
1749 | if (flags & MSG_DONTWAIT) { | |
1750 | rv = -EWOULDBLOCK; | |
1751 | goto out; | |
1752 | } | |
1753 | ||
d9dc8b0f | 1754 | add_wait_queue(sk_sleep(sk), &wait); |
9cd3e072 | 1755 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
d9dc8b0f | 1756 | sk_wait_event(sk, &timeo, dn_data_ready(sk, queue, flags, target), &wait); |
9cd3e072 | 1757 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
d9dc8b0f | 1758 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
1759 | } |
1760 | ||
bec571ec | 1761 | skb_queue_walk_safe(queue, skb, n) { |
1da177e4 LT |
1762 | unsigned int chunk = skb->len; |
1763 | cb = DN_SKB_CB(skb); | |
1764 | ||
1765 | if ((chunk + copied) > size) | |
1766 | chunk = size - copied; | |
1767 | ||
7eab8d9e | 1768 | if (memcpy_to_msg(msg, skb->data, chunk)) { |
1da177e4 LT |
1769 | rv = -EFAULT; |
1770 | break; | |
1771 | } | |
1772 | copied += chunk; | |
1773 | ||
1774 | if (!(flags & MSG_PEEK)) | |
1775 | skb_pull(skb, chunk); | |
1776 | ||
1777 | eor = cb->nsp_flags & 0x40; | |
1da177e4 LT |
1778 | |
1779 | if (skb->len == 0) { | |
8728b834 | 1780 | skb_unlink(skb, queue); |
1da177e4 | 1781 | kfree_skb(skb); |
429eb0fa | 1782 | /* |
1da177e4 LT |
1783 | * N.B. Don't refer to skb or cb after this point |
1784 | * in loop. | |
1785 | */ | |
1786 | if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) { | |
1787 | scp->flowloc_sw = DN_SEND; | |
1788 | dn_nsp_send_link(sk, DN_SEND, 0); | |
1789 | } | |
1790 | } | |
1791 | ||
429eb0fa | 1792 | if (eor) { |
1da177e4 LT |
1793 | if (sk->sk_type == SOCK_SEQPACKET) |
1794 | break; | |
1795 | if (!(flags & MSG_WAITALL)) | |
1796 | break; | |
1797 | } | |
1798 | ||
1799 | if (flags & MSG_OOB) | |
1800 | break; | |
1801 | ||
1802 | if (copied >= target) | |
1803 | break; | |
1804 | } | |
1805 | ||
1806 | rv = copied; | |
1807 | ||
1808 | ||
1809 | if (eor && (sk->sk_type == SOCK_SEQPACKET)) | |
1810 | msg->msg_flags |= MSG_EOR; | |
1811 | ||
1812 | out: | |
1813 | if (rv == 0) | |
1814 | rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk); | |
1815 | ||
1816 | if ((rv >= 0) && msg->msg_name) { | |
342dfc30 | 1817 | __sockaddr_check_size(sizeof(struct sockaddr_dn)); |
1da177e4 LT |
1818 | memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn)); |
1819 | msg->msg_namelen = sizeof(struct sockaddr_dn); | |
1820 | } | |
1821 | ||
1822 | release_sock(sk); | |
1823 | ||
1824 | return rv; | |
1825 | } | |
1826 | ||
1827 | ||
1828 | static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags) | |
1829 | { | |
1830 | unsigned char fctype = scp->services_rem & NSP_FC_MASK; | |
1831 | if (skb_queue_len(queue) >= scp->snd_window) | |
1832 | return 1; | |
1833 | if (fctype != NSP_FC_NONE) { | |
1834 | if (flags & MSG_OOB) { | |
1835 | if (scp->flowrem_oth == 0) | |
1836 | return 1; | |
1837 | } else { | |
1838 | if (scp->flowrem_dat == 0) | |
1839 | return 1; | |
1840 | } | |
1841 | } | |
1842 | return 0; | |
1843 | } | |
1844 | ||
1845 | /* | |
59c51591 | 1846 | * The DECnet spec requires that the "routing layer" accepts packets which |
1da177e4 LT |
1847 | * are at least 230 bytes in size. This excludes any headers which the NSP |
1848 | * layer might add, so we always assume that we'll be using the maximal | |
1849 | * length header on data packets. The variation in length is due to the | |
1850 | * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't | |
1851 | * make much practical difference. | |
1852 | */ | |
95c96174 | 1853 | unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu) |
1da177e4 | 1854 | { |
95c96174 | 1855 | unsigned int mss = 230 - DN_MAX_NSP_DATA_HEADER; |
1da177e4 | 1856 | if (dev) { |
fc766e4c | 1857 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
1da177e4 LT |
1858 | mtu -= LL_RESERVED_SPACE(dev); |
1859 | if (dn_db->use_long) | |
1860 | mtu -= 21; | |
1861 | else | |
1862 | mtu -= 6; | |
1863 | mtu -= DN_MAX_NSP_DATA_HEADER; | |
1864 | } else { | |
1865 | /* | |
1866 | * 21 = long header, 16 = guess at MAC header length | |
1867 | */ | |
1868 | mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16); | |
1869 | } | |
1870 | if (mtu > mss) | |
1871 | mss = mtu; | |
1872 | return mss; | |
1873 | } | |
1874 | ||
1875 | static inline unsigned int dn_current_mss(struct sock *sk, int flags) | |
1876 | { | |
1877 | struct dst_entry *dst = __sk_dst_get(sk); | |
1878 | struct dn_scp *scp = DN_SK(sk); | |
1879 | int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem); | |
1880 | ||
1881 | /* Other data messages are limited to 16 bytes per packet */ | |
1882 | if (flags & MSG_OOB) | |
1883 | return 16; | |
1884 | ||
1885 | /* This works out the maximum size of segment we can send out */ | |
1886 | if (dst) { | |
1887 | u32 mtu = dst_mtu(dst); | |
1888 | mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now); | |
1889 | } | |
1890 | ||
1891 | return mss_now; | |
1892 | } | |
1893 | ||
429eb0fa | 1894 | /* |
12a49ffd PC |
1895 | * N.B. We get the timeout wrong here, but then we always did get it |
1896 | * wrong before and this is another step along the road to correcting | |
1897 | * it. It ought to get updated each time we pass through the routine, | |
1898 | * but in practise it probably doesn't matter too much for now. | |
1899 | */ | |
1900 | static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk, | |
1901 | unsigned long datalen, int noblock, | |
1902 | int *errcode) | |
1903 | { | |
1904 | struct sk_buff *skb = sock_alloc_send_skb(sk, datalen, | |
1905 | noblock, errcode); | |
1906 | if (skb) { | |
b98999dc | 1907 | skb->protocol = htons(ETH_P_DNA_RT); |
12a49ffd PC |
1908 | skb->pkt_type = PACKET_OUTGOING; |
1909 | } | |
1910 | return skb; | |
1911 | } | |
1912 | ||
1b784140 | 1913 | static int dn_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
1da177e4 LT |
1914 | { |
1915 | struct sock *sk = sock->sk; | |
1916 | struct dn_scp *scp = DN_SK(sk); | |
1917 | size_t mss; | |
1918 | struct sk_buff_head *queue = &scp->data_xmit_queue; | |
1919 | int flags = msg->msg_flags; | |
1920 | int err = 0; | |
1921 | size_t sent = 0; | |
1922 | int addr_len = msg->msg_namelen; | |
342dfc30 | 1923 | DECLARE_SOCKADDR(struct sockaddr_dn *, addr, msg->msg_name); |
1da177e4 LT |
1924 | struct sk_buff *skb = NULL; |
1925 | struct dn_skb_cb *cb; | |
1926 | size_t len; | |
1927 | unsigned char fctype; | |
12a49ffd | 1928 | long timeo; |
1da177e4 LT |
1929 | |
1930 | if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT)) | |
1931 | return -EOPNOTSUPP; | |
1932 | ||
1933 | if (addr_len && (addr_len != sizeof(struct sockaddr_dn))) | |
1934 | return -EINVAL; | |
1935 | ||
12a49ffd PC |
1936 | lock_sock(sk); |
1937 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); | |
1da177e4 LT |
1938 | /* |
1939 | * The only difference between stream sockets and sequenced packet | |
1940 | * sockets is that the stream sockets always behave as if MSG_EOR | |
1941 | * has been set. | |
1942 | */ | |
1943 | if (sock->type == SOCK_STREAM) { | |
12a49ffd PC |
1944 | if (flags & MSG_EOR) { |
1945 | err = -EINVAL; | |
1946 | goto out; | |
1947 | } | |
1da177e4 LT |
1948 | flags |= MSG_EOR; |
1949 | } | |
1950 | ||
1da177e4 LT |
1951 | |
1952 | err = dn_check_state(sk, addr, addr_len, &timeo, flags); | |
1953 | if (err) | |
1954 | goto out_err; | |
1955 | ||
1956 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1957 | err = -EPIPE; | |
9eb5c94e PC |
1958 | if (!(flags & MSG_NOSIGNAL)) |
1959 | send_sig(SIGPIPE, current, 0); | |
1da177e4 LT |
1960 | goto out_err; |
1961 | } | |
1962 | ||
1963 | if ((flags & MSG_TRYHARD) && sk->sk_dst_cache) | |
b6c6712a | 1964 | dst_negative_advice(sk); |
1da177e4 LT |
1965 | |
1966 | mss = scp->segsize_rem; | |
1967 | fctype = scp->services_rem & NSP_FC_MASK; | |
1968 | ||
1969 | mss = dn_current_mss(sk, flags); | |
1970 | ||
1971 | if (flags & MSG_OOB) { | |
1972 | queue = &scp->other_xmit_queue; | |
1973 | if (size > mss) { | |
1974 | err = -EMSGSIZE; | |
1975 | goto out; | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | scp->persist_fxn = dn_nsp_xmit_timeout; | |
1980 | ||
1981 | while(sent < size) { | |
1982 | err = sock_error(sk); | |
1983 | if (err) | |
1984 | goto out; | |
1985 | ||
1986 | if (signal_pending(current)) { | |
1987 | err = sock_intr_errno(timeo); | |
1988 | goto out; | |
1989 | } | |
1990 | ||
1991 | /* | |
1992 | * Calculate size that we wish to send. | |
1993 | */ | |
1994 | len = size - sent; | |
1995 | ||
1996 | if (len > mss) | |
1997 | len = mss; | |
1998 | ||
1999 | /* | |
2000 | * Wait for queue size to go down below the window | |
2001 | * size. | |
2002 | */ | |
2003 | if (dn_queue_too_long(scp, queue, flags)) { | |
d9dc8b0f | 2004 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
22196d36 | 2005 | |
1da177e4 LT |
2006 | if (flags & MSG_DONTWAIT) { |
2007 | err = -EWOULDBLOCK; | |
2008 | goto out; | |
2009 | } | |
2010 | ||
d9dc8b0f | 2011 | add_wait_queue(sk_sleep(sk), &wait); |
9cd3e072 | 2012 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
22196d36 | 2013 | sk_wait_event(sk, &timeo, |
d9dc8b0f | 2014 | !dn_queue_too_long(scp, queue, flags), &wait); |
9cd3e072 | 2015 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
d9dc8b0f | 2016 | remove_wait_queue(sk_sleep(sk), &wait); |
1da177e4 LT |
2017 | continue; |
2018 | } | |
2019 | ||
2020 | /* | |
2021 | * Get a suitably sized skb. | |
12a49ffd PC |
2022 | * 64 is a bit of a hack really, but its larger than any |
2023 | * link-layer headers and has served us well as a good | |
2024 | * guess as to their real length. | |
1da177e4 | 2025 | */ |
12a49ffd PC |
2026 | skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER, |
2027 | flags & MSG_DONTWAIT, &err); | |
1da177e4 LT |
2028 | |
2029 | if (err) | |
2030 | break; | |
2031 | ||
2032 | if (!skb) | |
2033 | continue; | |
2034 | ||
2035 | cb = DN_SKB_CB(skb); | |
2036 | ||
12a49ffd | 2037 | skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER); |
1da177e4 | 2038 | |
6ce8e9ce | 2039 | if (memcpy_from_msg(skb_put(skb, len), msg, len)) { |
1da177e4 LT |
2040 | err = -EFAULT; |
2041 | goto out; | |
2042 | } | |
2043 | ||
2044 | if (flags & MSG_OOB) { | |
2045 | cb->nsp_flags = 0x30; | |
2046 | if (fctype != NSP_FC_NONE) | |
2047 | scp->flowrem_oth--; | |
2048 | } else { | |
2049 | cb->nsp_flags = 0x00; | |
2050 | if (scp->seg_total == 0) | |
2051 | cb->nsp_flags |= 0x20; | |
2052 | ||
2053 | scp->seg_total += len; | |
429eb0fa | 2054 | |
1da177e4 LT |
2055 | if (((sent + len) == size) && (flags & MSG_EOR)) { |
2056 | cb->nsp_flags |= 0x40; | |
2057 | scp->seg_total = 0; | |
2058 | if (fctype == NSP_FC_SCMC) | |
2059 | scp->flowrem_dat--; | |
2060 | } | |
2061 | if (fctype == NSP_FC_SRC) | |
2062 | scp->flowrem_dat--; | |
2063 | } | |
2064 | ||
2065 | sent += len; | |
2066 | dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB); | |
2067 | skb = NULL; | |
2068 | ||
2069 | scp->persist = dn_nsp_persist(sk); | |
2070 | ||
2071 | } | |
2072 | out: | |
2073 | ||
db849df6 | 2074 | kfree_skb(skb); |
1da177e4 LT |
2075 | |
2076 | release_sock(sk); | |
2077 | ||
2078 | return sent ? sent : err; | |
2079 | ||
2080 | out_err: | |
001ab02a | 2081 | err = sk_stream_error(sk, flags, err); |
1da177e4 LT |
2082 | release_sock(sk); |
2083 | return err; | |
2084 | } | |
2085 | ||
2086 | static int dn_device_event(struct notifier_block *this, unsigned long event, | |
351638e7 | 2087 | void *ptr) |
1da177e4 | 2088 | { |
351638e7 | 2089 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
1da177e4 | 2090 | |
721499e8 | 2091 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
2092 | return NOTIFY_DONE; |
2093 | ||
06f8fe11 JP |
2094 | switch (event) { |
2095 | case NETDEV_UP: | |
2096 | dn_dev_up(dev); | |
2097 | break; | |
2098 | case NETDEV_DOWN: | |
2099 | dn_dev_down(dev); | |
2100 | break; | |
2101 | default: | |
2102 | break; | |
1da177e4 LT |
2103 | } |
2104 | ||
2105 | return NOTIFY_DONE; | |
2106 | } | |
2107 | ||
2108 | static struct notifier_block dn_dev_notifier = { | |
2109 | .notifier_call = dn_device_event, | |
2110 | }; | |
2111 | ||
7546dd97 | 2112 | static struct packet_type dn_dix_packet_type __read_mostly = { |
09640e63 | 2113 | .type = cpu_to_be16(ETH_P_DNA_RT), |
1da177e4 LT |
2114 | .func = dn_route_rcv, |
2115 | }; | |
2116 | ||
2117 | #ifdef CONFIG_PROC_FS | |
2118 | struct dn_iter_state { | |
2119 | int bucket; | |
2120 | }; | |
2121 | ||
2122 | static struct sock *dn_socket_get_first(struct seq_file *seq) | |
2123 | { | |
2124 | struct dn_iter_state *state = seq->private; | |
2125 | struct sock *n = NULL; | |
2126 | ||
2127 | for(state->bucket = 0; | |
2128 | state->bucket < DN_SK_HASH_SIZE; | |
2129 | ++state->bucket) { | |
2130 | n = sk_head(&dn_sk_hash[state->bucket]); | |
2131 | if (n) | |
2132 | break; | |
2133 | } | |
2134 | ||
2135 | return n; | |
2136 | } | |
2137 | ||
2138 | static struct sock *dn_socket_get_next(struct seq_file *seq, | |
2139 | struct sock *n) | |
2140 | { | |
2141 | struct dn_iter_state *state = seq->private; | |
2142 | ||
2143 | n = sk_next(n); | |
2144 | try_again: | |
2145 | if (n) | |
2146 | goto out; | |
2147 | if (++state->bucket >= DN_SK_HASH_SIZE) | |
2148 | goto out; | |
2149 | n = sk_head(&dn_sk_hash[state->bucket]); | |
2150 | goto try_again; | |
2151 | out: | |
2152 | return n; | |
2153 | } | |
2154 | ||
2155 | static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos) | |
2156 | { | |
2157 | struct sock *sk = dn_socket_get_first(seq); | |
2158 | ||
2159 | if (sk) { | |
2160 | while(*pos && (sk = dn_socket_get_next(seq, sk))) | |
2161 | --*pos; | |
2162 | } | |
2163 | return *pos ? NULL : sk; | |
2164 | } | |
2165 | ||
2166 | static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos) | |
2167 | { | |
2168 | void *rc; | |
2169 | read_lock_bh(&dn_hash_lock); | |
2170 | rc = socket_get_idx(seq, &pos); | |
2171 | if (!rc) { | |
2172 | read_unlock_bh(&dn_hash_lock); | |
2173 | } | |
2174 | return rc; | |
2175 | } | |
2176 | ||
2177 | static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos) | |
2178 | { | |
2179 | return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2180 | } | |
2181 | ||
2182 | static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2183 | { | |
2184 | void *rc; | |
2185 | ||
2186 | if (v == SEQ_START_TOKEN) { | |
2187 | rc = dn_socket_get_idx(seq, 0); | |
2188 | goto out; | |
2189 | } | |
2190 | ||
2191 | rc = dn_socket_get_next(seq, v); | |
2192 | if (rc) | |
2193 | goto out; | |
2194 | read_unlock_bh(&dn_hash_lock); | |
2195 | out: | |
2196 | ++*pos; | |
2197 | return rc; | |
2198 | } | |
2199 | ||
2200 | static void dn_socket_seq_stop(struct seq_file *seq, void *v) | |
2201 | { | |
2202 | if (v && v != SEQ_START_TOKEN) | |
2203 | read_unlock_bh(&dn_hash_lock); | |
2204 | } | |
2205 | ||
2206 | #define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126) | |
2207 | ||
2208 | static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf) | |
2209 | { | |
2210 | int i; | |
429eb0fa | 2211 | |
c4106aa8 | 2212 | switch (le16_to_cpu(dn->sdn_objnamel)) { |
06f8fe11 JP |
2213 | case 0: |
2214 | sprintf(buf, "%d", dn->sdn_objnum); | |
2215 | break; | |
2216 | default: | |
2217 | for (i = 0; i < le16_to_cpu(dn->sdn_objnamel); i++) { | |
2218 | buf[i] = dn->sdn_objname[i]; | |
2219 | if (IS_NOT_PRINTABLE(buf[i])) | |
2220 | buf[i] = '.'; | |
2221 | } | |
2222 | buf[i] = 0; | |
429eb0fa | 2223 | } |
1da177e4 LT |
2224 | } |
2225 | ||
2226 | static char *dn_state2asc(unsigned char state) | |
2227 | { | |
06f8fe11 JP |
2228 | switch (state) { |
2229 | case DN_O: | |
2230 | return "OPEN"; | |
2231 | case DN_CR: | |
2232 | return " CR"; | |
2233 | case DN_DR: | |
2234 | return " DR"; | |
2235 | case DN_DRC: | |
2236 | return " DRC"; | |
2237 | case DN_CC: | |
2238 | return " CC"; | |
2239 | case DN_CI: | |
2240 | return " CI"; | |
2241 | case DN_NR: | |
2242 | return " NR"; | |
2243 | case DN_NC: | |
2244 | return " NC"; | |
2245 | case DN_CD: | |
2246 | return " CD"; | |
2247 | case DN_RJ: | |
2248 | return " RJ"; | |
2249 | case DN_RUN: | |
2250 | return " RUN"; | |
2251 | case DN_DI: | |
2252 | return " DI"; | |
2253 | case DN_DIC: | |
2254 | return " DIC"; | |
2255 | case DN_DN: | |
2256 | return " DN"; | |
2257 | case DN_CL: | |
2258 | return " CL"; | |
2259 | case DN_CN: | |
2260 | return " CN"; | |
1da177e4 LT |
2261 | } |
2262 | ||
2263 | return "????"; | |
2264 | } | |
2265 | ||
2266 | static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk) | |
2267 | { | |
2268 | struct dn_scp *scp = DN_SK(sk); | |
2269 | char buf1[DN_ASCBUF_LEN]; | |
2270 | char buf2[DN_ASCBUF_LEN]; | |
2271 | char local_object[DN_MAXOBJL+3]; | |
2272 | char remote_object[DN_MAXOBJL+3]; | |
2273 | ||
2274 | dn_printable_object(&scp->addr, local_object); | |
2275 | dn_printable_object(&scp->peer, remote_object); | |
2276 | ||
2277 | seq_printf(seq, | |
2278 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s " | |
2279 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n", | |
c4106aa8 | 2280 | dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->addr)), buf1), |
1da177e4 LT |
2281 | scp->addrloc, |
2282 | scp->numdat, | |
2283 | scp->numoth, | |
2284 | scp->ackxmt_dat, | |
2285 | scp->ackxmt_oth, | |
2286 | scp->flowloc_sw, | |
2287 | local_object, | |
c4106aa8 | 2288 | dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->peer)), buf2), |
1da177e4 LT |
2289 | scp->addrrem, |
2290 | scp->numdat_rcv, | |
2291 | scp->numoth_rcv, | |
2292 | scp->ackrcv_dat, | |
2293 | scp->ackrcv_oth, | |
2294 | scp->flowrem_sw, | |
2295 | remote_object, | |
2296 | dn_state2asc(scp->state), | |
2297 | ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER")); | |
2298 | } | |
2299 | ||
2300 | static int dn_socket_seq_show(struct seq_file *seq, void *v) | |
2301 | { | |
2302 | if (v == SEQ_START_TOKEN) { | |
2303 | seq_puts(seq, "Local Remote\n"); | |
2304 | } else { | |
2305 | dn_socket_format_entry(seq, v); | |
2306 | } | |
2307 | return 0; | |
2308 | } | |
2309 | ||
56b3d975 | 2310 | static const struct seq_operations dn_socket_seq_ops = { |
1da177e4 LT |
2311 | .start = dn_socket_seq_start, |
2312 | .next = dn_socket_seq_next, | |
2313 | .stop = dn_socket_seq_stop, | |
2314 | .show = dn_socket_seq_show, | |
2315 | }; | |
2316 | ||
2317 | static int dn_socket_seq_open(struct inode *inode, struct file *file) | |
2318 | { | |
c20932d2 PE |
2319 | return seq_open_private(file, &dn_socket_seq_ops, |
2320 | sizeof(struct dn_iter_state)); | |
1da177e4 LT |
2321 | } |
2322 | ||
9a32144e | 2323 | static const struct file_operations dn_socket_seq_fops = { |
1da177e4 LT |
2324 | .owner = THIS_MODULE, |
2325 | .open = dn_socket_seq_open, | |
2326 | .read = seq_read, | |
2327 | .llseek = seq_lseek, | |
2328 | .release = seq_release_private, | |
2329 | }; | |
2330 | #endif | |
2331 | ||
ec1b4cf7 | 2332 | static const struct net_proto_family dn_family_ops = { |
1da177e4 LT |
2333 | .family = AF_DECnet, |
2334 | .create = dn_create, | |
2335 | .owner = THIS_MODULE, | |
2336 | }; | |
2337 | ||
90ddc4f0 | 2338 | static const struct proto_ops dn_proto_ops = { |
1da177e4 LT |
2339 | .family = AF_DECnet, |
2340 | .owner = THIS_MODULE, | |
2341 | .release = dn_release, | |
2342 | .bind = dn_bind, | |
2343 | .connect = dn_connect, | |
2344 | .socketpair = sock_no_socketpair, | |
2345 | .accept = dn_accept, | |
2346 | .getname = dn_getname, | |
2347 | .poll = dn_poll, | |
2348 | .ioctl = dn_ioctl, | |
2349 | .listen = dn_listen, | |
2350 | .shutdown = dn_shutdown, | |
2351 | .setsockopt = dn_setsockopt, | |
2352 | .getsockopt = dn_getsockopt, | |
2353 | .sendmsg = dn_sendmsg, | |
2354 | .recvmsg = dn_recvmsg, | |
2355 | .mmap = sock_no_mmap, | |
2356 | .sendpage = sock_no_sendpage, | |
2357 | }; | |
2358 | ||
1da177e4 LT |
2359 | MODULE_DESCRIPTION("The Linux DECnet Network Protocol"); |
2360 | MODULE_AUTHOR("Linux DECnet Project Team"); | |
2361 | MODULE_LICENSE("GPL"); | |
2362 | MODULE_ALIAS_NETPROTO(PF_DECnet); | |
2363 | ||
06324664 KC |
2364 | static const char banner[] __initconst = KERN_INFO |
2365 | "NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n"; | |
1da177e4 LT |
2366 | |
2367 | static int __init decnet_init(void) | |
2368 | { | |
2369 | int rc; | |
2370 | ||
429eb0fa | 2371 | printk(banner); |
1da177e4 LT |
2372 | |
2373 | rc = proto_register(&dn_proto, 1); | |
2374 | if (rc != 0) | |
2375 | goto out; | |
2376 | ||
2377 | dn_neigh_init(); | |
2378 | dn_dev_init(); | |
2379 | dn_route_init(); | |
2380 | dn_fib_init(); | |
2381 | ||
2382 | sock_register(&dn_family_ops); | |
2383 | dev_add_pack(&dn_dix_packet_type); | |
2384 | register_netdevice_notifier(&dn_dev_notifier); | |
2385 | ||
d4beaa66 | 2386 | proc_create("decnet", S_IRUGO, init_net.proc_net, &dn_socket_seq_fops); |
1da177e4 LT |
2387 | dn_register_sysctl(); |
2388 | out: | |
2389 | return rc; | |
2390 | ||
2391 | } | |
2392 | module_init(decnet_init); | |
2393 | ||
2394 | /* | |
2395 | * Prevent DECnet module unloading until its fixed properly. | |
2396 | * Requires an audit of the code to check for memory leaks and | |
2397 | * initialisation problems etc. | |
2398 | */ | |
2399 | #if 0 | |
2400 | static void __exit decnet_exit(void) | |
2401 | { | |
2402 | sock_unregister(AF_DECnet); | |
fa34ddd7 | 2403 | rtnl_unregister_all(PF_DECnet); |
1da177e4 LT |
2404 | dev_remove_pack(&dn_dix_packet_type); |
2405 | ||
2406 | dn_unregister_sysctl(); | |
2407 | ||
2408 | unregister_netdevice_notifier(&dn_dev_notifier); | |
2409 | ||
2410 | dn_route_cleanup(); | |
2411 | dn_dev_cleanup(); | |
2412 | dn_neigh_cleanup(); | |
2413 | dn_fib_cleanup(); | |
2414 | ||
ece31ffd | 2415 | remove_proc_entry("decnet", init_net.proc_net); |
1da177e4 LT |
2416 | |
2417 | proto_unregister(&dn_proto); | |
10e85448 JDB |
2418 | |
2419 | rcu_barrier_bh(); /* Wait for completion of call_rcu_bh()'s */ | |
1da177e4 LT |
2420 | } |
2421 | module_exit(decnet_exit); | |
2422 | #endif |