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1da177e4 LT |
1 | /* |
2 | * linux/fs/ncpfs/sock.c | |
3 | * | |
4 | * Copyright (C) 1992, 1993 Rick Sladkey | |
5 | * | |
6 | * Modified 1995, 1996 by Volker Lendecke to be usable for ncp | |
7 | * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache | |
8 | * | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | |
12 | #include <linux/time.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/socket.h> | |
15 | #include <linux/fcntl.h> | |
16 | #include <linux/stat.h> | |
17 | #include <asm/uaccess.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/net.h> | |
20 | #include <linux/mm.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/signal.h> | |
23 | #include <net/scm.h> | |
24 | #include <net/sock.h> | |
25 | #include <linux/ipx.h> | |
26 | #include <linux/poll.h> | |
27 | #include <linux/file.h> | |
28 | ||
29 | #include <linux/ncp_fs.h> | |
30 | ||
31 | #include "ncpsign_kernel.h" | |
32 | ||
33 | static int _recv(struct socket *sock, void *buf, int size, unsigned flags) | |
34 | { | |
35 | struct msghdr msg = {NULL, }; | |
36 | struct kvec iov = {buf, size}; | |
37 | return kernel_recvmsg(sock, &msg, &iov, 1, size, flags); | |
38 | } | |
39 | ||
40 | static inline int do_send(struct socket *sock, struct kvec *vec, int count, | |
41 | int len, unsigned flags) | |
42 | { | |
43 | struct msghdr msg = { .msg_flags = flags }; | |
44 | return kernel_sendmsg(sock, &msg, vec, count, len); | |
45 | } | |
46 | ||
47 | static int _send(struct socket *sock, const void *buff, int len) | |
48 | { | |
49 | struct kvec vec; | |
50 | vec.iov_base = (void *) buff; | |
51 | vec.iov_len = len; | |
52 | return do_send(sock, &vec, 1, len, 0); | |
53 | } | |
54 | ||
55 | struct ncp_request_reply { | |
56 | struct list_head req; | |
57 | wait_queue_head_t wq; | |
58 | struct ncp_reply_header* reply_buf; | |
59 | size_t datalen; | |
60 | int result; | |
61 | enum { RQ_DONE, RQ_INPROGRESS, RQ_QUEUED, RQ_IDLE } status; | |
62 | struct kvec* tx_ciov; | |
63 | size_t tx_totallen; | |
64 | size_t tx_iovlen; | |
65 | struct kvec tx_iov[3]; | |
66 | u_int16_t tx_type; | |
67 | u_int32_t sign[6]; | |
68 | }; | |
69 | ||
70 | void ncp_tcp_data_ready(struct sock *sk, int len) | |
71 | { | |
72 | struct ncp_server *server = sk->sk_user_data; | |
73 | ||
74 | server->data_ready(sk, len); | |
75 | schedule_work(&server->rcv.tq); | |
76 | } | |
77 | ||
78 | void ncp_tcp_error_report(struct sock *sk) | |
79 | { | |
80 | struct ncp_server *server = sk->sk_user_data; | |
81 | ||
82 | server->error_report(sk); | |
83 | schedule_work(&server->rcv.tq); | |
84 | } | |
85 | ||
86 | void ncp_tcp_write_space(struct sock *sk) | |
87 | { | |
88 | struct ncp_server *server = sk->sk_user_data; | |
89 | ||
90 | /* We do not need any locking: we first set tx.creq, and then we do sendmsg, | |
91 | not vice versa... */ | |
92 | server->write_space(sk); | |
93 | if (server->tx.creq) | |
94 | schedule_work(&server->tx.tq); | |
95 | } | |
96 | ||
97 | void ncpdgram_timeout_call(unsigned long v) | |
98 | { | |
99 | struct ncp_server *server = (void*)v; | |
100 | ||
101 | schedule_work(&server->timeout_tq); | |
102 | } | |
103 | ||
104 | static inline void ncp_finish_request(struct ncp_request_reply *req, int result) | |
105 | { | |
106 | req->result = result; | |
107 | req->status = RQ_DONE; | |
108 | wake_up_all(&req->wq); | |
109 | } | |
110 | ||
111 | static void __abort_ncp_connection(struct ncp_server *server, struct ncp_request_reply *aborted, int err) | |
112 | { | |
113 | struct ncp_request_reply *req; | |
114 | ||
115 | ncp_invalidate_conn(server); | |
116 | del_timer(&server->timeout_tm); | |
117 | while (!list_empty(&server->tx.requests)) { | |
118 | req = list_entry(server->tx.requests.next, struct ncp_request_reply, req); | |
119 | ||
120 | list_del_init(&req->req); | |
121 | if (req == aborted) { | |
122 | ncp_finish_request(req, err); | |
123 | } else { | |
124 | ncp_finish_request(req, -EIO); | |
125 | } | |
126 | } | |
127 | req = server->rcv.creq; | |
128 | if (req) { | |
129 | server->rcv.creq = NULL; | |
130 | if (req == aborted) { | |
131 | ncp_finish_request(req, err); | |
132 | } else { | |
133 | ncp_finish_request(req, -EIO); | |
134 | } | |
135 | server->rcv.ptr = NULL; | |
136 | server->rcv.state = 0; | |
137 | } | |
138 | req = server->tx.creq; | |
139 | if (req) { | |
140 | server->tx.creq = NULL; | |
141 | if (req == aborted) { | |
142 | ncp_finish_request(req, err); | |
143 | } else { | |
144 | ncp_finish_request(req, -EIO); | |
145 | } | |
146 | } | |
147 | } | |
148 | ||
149 | static inline int get_conn_number(struct ncp_reply_header *rp) | |
150 | { | |
151 | return rp->conn_low | (rp->conn_high << 8); | |
152 | } | |
153 | ||
154 | static inline void __ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err) | |
155 | { | |
156 | /* If req is done, we got signal, but we also received answer... */ | |
157 | switch (req->status) { | |
158 | case RQ_IDLE: | |
159 | case RQ_DONE: | |
160 | break; | |
161 | case RQ_QUEUED: | |
162 | list_del_init(&req->req); | |
163 | ncp_finish_request(req, err); | |
164 | break; | |
165 | case RQ_INPROGRESS: | |
166 | __abort_ncp_connection(server, req, err); | |
167 | break; | |
168 | } | |
169 | } | |
170 | ||
171 | static inline void ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err) | |
172 | { | |
8e3f9045 | 173 | mutex_lock(&server->rcv.creq_mutex); |
1da177e4 | 174 | __ncp_abort_request(server, req, err); |
8e3f9045 | 175 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
176 | } |
177 | ||
178 | static inline void __ncptcp_abort(struct ncp_server *server) | |
179 | { | |
180 | __abort_ncp_connection(server, NULL, 0); | |
181 | } | |
182 | ||
183 | static int ncpdgram_send(struct socket *sock, struct ncp_request_reply *req) | |
184 | { | |
185 | struct kvec vec[3]; | |
186 | /* sock_sendmsg updates iov pointers for us :-( */ | |
187 | memcpy(vec, req->tx_ciov, req->tx_iovlen * sizeof(vec[0])); | |
188 | return do_send(sock, vec, req->tx_iovlen, | |
189 | req->tx_totallen, MSG_DONTWAIT); | |
190 | } | |
191 | ||
192 | static void __ncptcp_try_send(struct ncp_server *server) | |
193 | { | |
194 | struct ncp_request_reply *rq; | |
195 | struct kvec *iov; | |
196 | struct kvec iovc[3]; | |
197 | int result; | |
198 | ||
199 | rq = server->tx.creq; | |
200 | if (!rq) | |
201 | return; | |
202 | ||
203 | /* sock_sendmsg updates iov pointers for us :-( */ | |
204 | memcpy(iovc, rq->tx_ciov, rq->tx_iovlen * sizeof(iov[0])); | |
205 | result = do_send(server->ncp_sock, iovc, rq->tx_iovlen, | |
206 | rq->tx_totallen, MSG_NOSIGNAL | MSG_DONTWAIT); | |
207 | ||
208 | if (result == -EAGAIN) | |
209 | return; | |
210 | ||
211 | if (result < 0) { | |
212 | printk(KERN_ERR "ncpfs: tcp: Send failed: %d\n", result); | |
213 | __ncp_abort_request(server, rq, result); | |
214 | return; | |
215 | } | |
216 | if (result >= rq->tx_totallen) { | |
217 | server->rcv.creq = rq; | |
218 | server->tx.creq = NULL; | |
219 | return; | |
220 | } | |
221 | rq->tx_totallen -= result; | |
222 | iov = rq->tx_ciov; | |
223 | while (iov->iov_len <= result) { | |
224 | result -= iov->iov_len; | |
225 | iov++; | |
226 | rq->tx_iovlen--; | |
227 | } | |
228 | iov->iov_base += result; | |
229 | iov->iov_len -= result; | |
230 | rq->tx_ciov = iov; | |
231 | } | |
232 | ||
233 | static inline void ncp_init_header(struct ncp_server *server, struct ncp_request_reply *req, struct ncp_request_header *h) | |
234 | { | |
235 | req->status = RQ_INPROGRESS; | |
236 | h->conn_low = server->connection; | |
237 | h->conn_high = server->connection >> 8; | |
238 | h->sequence = ++server->sequence; | |
239 | } | |
240 | ||
241 | static void ncpdgram_start_request(struct ncp_server *server, struct ncp_request_reply *req) | |
242 | { | |
243 | size_t signlen; | |
244 | struct ncp_request_header* h; | |
245 | ||
246 | req->tx_ciov = req->tx_iov + 1; | |
247 | ||
248 | h = req->tx_iov[1].iov_base; | |
249 | ncp_init_header(server, req, h); | |
250 | signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1, | |
251 | req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1, | |
252 | cpu_to_le32(req->tx_totallen), req->sign); | |
253 | if (signlen) { | |
254 | req->tx_ciov[1].iov_base = req->sign; | |
255 | req->tx_ciov[1].iov_len = signlen; | |
256 | req->tx_iovlen += 1; | |
257 | req->tx_totallen += signlen; | |
258 | } | |
259 | server->rcv.creq = req; | |
260 | server->timeout_last = server->m.time_out; | |
261 | server->timeout_retries = server->m.retry_count; | |
262 | ncpdgram_send(server->ncp_sock, req); | |
263 | mod_timer(&server->timeout_tm, jiffies + server->m.time_out); | |
264 | } | |
265 | ||
266 | #define NCP_TCP_XMIT_MAGIC (0x446D6454) | |
267 | #define NCP_TCP_XMIT_VERSION (1) | |
268 | #define NCP_TCP_RCVD_MAGIC (0x744E6350) | |
269 | ||
270 | static void ncptcp_start_request(struct ncp_server *server, struct ncp_request_reply *req) | |
271 | { | |
272 | size_t signlen; | |
273 | struct ncp_request_header* h; | |
274 | ||
275 | req->tx_ciov = req->tx_iov; | |
276 | h = req->tx_iov[1].iov_base; | |
277 | ncp_init_header(server, req, h); | |
278 | signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1, | |
279 | req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1, | |
280 | cpu_to_be32(req->tx_totallen + 24), req->sign + 4) + 16; | |
281 | ||
282 | req->sign[0] = htonl(NCP_TCP_XMIT_MAGIC); | |
283 | req->sign[1] = htonl(req->tx_totallen + signlen); | |
284 | req->sign[2] = htonl(NCP_TCP_XMIT_VERSION); | |
285 | req->sign[3] = htonl(req->datalen + 8); | |
286 | req->tx_iov[0].iov_base = req->sign; | |
287 | req->tx_iov[0].iov_len = signlen; | |
288 | req->tx_iovlen += 1; | |
289 | req->tx_totallen += signlen; | |
290 | ||
291 | server->tx.creq = req; | |
292 | __ncptcp_try_send(server); | |
293 | } | |
294 | ||
295 | static inline void __ncp_start_request(struct ncp_server *server, struct ncp_request_reply *req) | |
296 | { | |
297 | if (server->ncp_sock->type == SOCK_STREAM) | |
298 | ncptcp_start_request(server, req); | |
299 | else | |
300 | ncpdgram_start_request(server, req); | |
301 | } | |
302 | ||
303 | static int ncp_add_request(struct ncp_server *server, struct ncp_request_reply *req) | |
304 | { | |
8e3f9045 | 305 | mutex_lock(&server->rcv.creq_mutex); |
1da177e4 | 306 | if (!ncp_conn_valid(server)) { |
8e3f9045 | 307 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
308 | printk(KERN_ERR "ncpfs: tcp: Server died\n"); |
309 | return -EIO; | |
310 | } | |
311 | if (server->tx.creq || server->rcv.creq) { | |
312 | req->status = RQ_QUEUED; | |
313 | list_add_tail(&req->req, &server->tx.requests); | |
8e3f9045 | 314 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
315 | return 0; |
316 | } | |
317 | __ncp_start_request(server, req); | |
8e3f9045 | 318 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
319 | return 0; |
320 | } | |
321 | ||
322 | static void __ncp_next_request(struct ncp_server *server) | |
323 | { | |
324 | struct ncp_request_reply *req; | |
325 | ||
326 | server->rcv.creq = NULL; | |
327 | if (list_empty(&server->tx.requests)) { | |
328 | return; | |
329 | } | |
330 | req = list_entry(server->tx.requests.next, struct ncp_request_reply, req); | |
331 | list_del_init(&req->req); | |
332 | __ncp_start_request(server, req); | |
333 | } | |
334 | ||
335 | static void info_server(struct ncp_server *server, unsigned int id, const void * data, size_t len) | |
336 | { | |
337 | if (server->info_sock) { | |
338 | struct kvec iov[2]; | |
339 | __be32 hdr[2]; | |
340 | ||
341 | hdr[0] = cpu_to_be32(len + 8); | |
342 | hdr[1] = cpu_to_be32(id); | |
343 | ||
344 | iov[0].iov_base = hdr; | |
345 | iov[0].iov_len = 8; | |
346 | iov[1].iov_base = (void *) data; | |
347 | iov[1].iov_len = len; | |
348 | ||
349 | do_send(server->info_sock, iov, 2, len + 8, MSG_NOSIGNAL); | |
350 | } | |
351 | } | |
352 | ||
353 | void ncpdgram_rcv_proc(void *s) | |
354 | { | |
355 | struct ncp_server *server = s; | |
356 | struct socket* sock; | |
357 | ||
358 | sock = server->ncp_sock; | |
359 | ||
360 | while (1) { | |
361 | struct ncp_reply_header reply; | |
362 | int result; | |
363 | ||
364 | result = _recv(sock, &reply, sizeof(reply), MSG_PEEK | MSG_DONTWAIT); | |
365 | if (result < 0) { | |
366 | break; | |
367 | } | |
368 | if (result >= sizeof(reply)) { | |
369 | struct ncp_request_reply *req; | |
370 | ||
371 | if (reply.type == NCP_WATCHDOG) { | |
372 | unsigned char buf[10]; | |
373 | ||
374 | if (server->connection != get_conn_number(&reply)) { | |
375 | goto drop; | |
376 | } | |
377 | result = _recv(sock, buf, sizeof(buf), MSG_DONTWAIT); | |
378 | if (result < 0) { | |
379 | DPRINTK("recv failed with %d\n", result); | |
380 | continue; | |
381 | } | |
382 | if (result < 10) { | |
383 | DPRINTK("too short (%u) watchdog packet\n", result); | |
384 | continue; | |
385 | } | |
386 | if (buf[9] != '?') { | |
387 | DPRINTK("bad signature (%02X) in watchdog packet\n", buf[9]); | |
388 | continue; | |
389 | } | |
390 | buf[9] = 'Y'; | |
391 | _send(sock, buf, sizeof(buf)); | |
392 | continue; | |
393 | } | |
394 | if (reply.type != NCP_POSITIVE_ACK && reply.type != NCP_REPLY) { | |
395 | result = _recv(sock, server->unexpected_packet.data, sizeof(server->unexpected_packet.data), MSG_DONTWAIT); | |
396 | if (result < 0) { | |
397 | continue; | |
398 | } | |
399 | info_server(server, 0, server->unexpected_packet.data, result); | |
400 | continue; | |
401 | } | |
8e3f9045 | 402 | mutex_lock(&server->rcv.creq_mutex); |
1da177e4 LT |
403 | req = server->rcv.creq; |
404 | if (req && (req->tx_type == NCP_ALLOC_SLOT_REQUEST || (server->sequence == reply.sequence && | |
405 | server->connection == get_conn_number(&reply)))) { | |
406 | if (reply.type == NCP_POSITIVE_ACK) { | |
407 | server->timeout_retries = server->m.retry_count; | |
408 | server->timeout_last = NCP_MAX_RPC_TIMEOUT; | |
409 | mod_timer(&server->timeout_tm, jiffies + NCP_MAX_RPC_TIMEOUT); | |
410 | } else if (reply.type == NCP_REPLY) { | |
411 | result = _recv(sock, (void*)req->reply_buf, req->datalen, MSG_DONTWAIT); | |
412 | #ifdef CONFIG_NCPFS_PACKET_SIGNING | |
413 | if (result >= 0 && server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) { | |
414 | if (result < 8 + 8) { | |
415 | result = -EIO; | |
416 | } else { | |
417 | unsigned int hdrl; | |
418 | ||
419 | result -= 8; | |
420 | hdrl = sock->sk->sk_family == AF_INET ? 8 : 6; | |
421 | if (sign_verify_reply(server, ((char*)req->reply_buf) + hdrl, result - hdrl, cpu_to_le32(result), ((char*)req->reply_buf) + result)) { | |
422 | printk(KERN_INFO "ncpfs: Signature violation\n"); | |
423 | result = -EIO; | |
424 | } | |
425 | } | |
426 | } | |
427 | #endif | |
428 | del_timer(&server->timeout_tm); | |
429 | server->rcv.creq = NULL; | |
430 | ncp_finish_request(req, result); | |
431 | __ncp_next_request(server); | |
8e3f9045 | 432 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
433 | continue; |
434 | } | |
435 | } | |
8e3f9045 | 436 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
437 | } |
438 | drop:; | |
439 | _recv(sock, &reply, sizeof(reply), MSG_DONTWAIT); | |
440 | } | |
441 | } | |
442 | ||
443 | static void __ncpdgram_timeout_proc(struct ncp_server *server) | |
444 | { | |
445 | /* If timer is pending, we are processing another request... */ | |
446 | if (!timer_pending(&server->timeout_tm)) { | |
447 | struct ncp_request_reply* req; | |
448 | ||
449 | req = server->rcv.creq; | |
450 | if (req) { | |
451 | int timeout; | |
452 | ||
453 | if (server->m.flags & NCP_MOUNT_SOFT) { | |
454 | if (server->timeout_retries-- == 0) { | |
455 | __ncp_abort_request(server, req, -ETIMEDOUT); | |
456 | return; | |
457 | } | |
458 | } | |
459 | /* Ignore errors */ | |
460 | ncpdgram_send(server->ncp_sock, req); | |
461 | timeout = server->timeout_last << 1; | |
462 | if (timeout > NCP_MAX_RPC_TIMEOUT) { | |
463 | timeout = NCP_MAX_RPC_TIMEOUT; | |
464 | } | |
465 | server->timeout_last = timeout; | |
466 | mod_timer(&server->timeout_tm, jiffies + timeout); | |
467 | } | |
468 | } | |
469 | } | |
470 | ||
471 | void ncpdgram_timeout_proc(void *s) | |
472 | { | |
473 | struct ncp_server *server = s; | |
8e3f9045 | 474 | mutex_lock(&server->rcv.creq_mutex); |
1da177e4 | 475 | __ncpdgram_timeout_proc(server); |
8e3f9045 | 476 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
477 | } |
478 | ||
479 | static inline void ncp_init_req(struct ncp_request_reply* req) | |
480 | { | |
481 | init_waitqueue_head(&req->wq); | |
482 | req->status = RQ_IDLE; | |
483 | } | |
484 | ||
485 | static int do_tcp_rcv(struct ncp_server *server, void *buffer, size_t len) | |
486 | { | |
487 | int result; | |
488 | ||
489 | if (buffer) { | |
490 | result = _recv(server->ncp_sock, buffer, len, MSG_DONTWAIT); | |
491 | } else { | |
492 | static unsigned char dummy[1024]; | |
493 | ||
494 | if (len > sizeof(dummy)) { | |
495 | len = sizeof(dummy); | |
496 | } | |
497 | result = _recv(server->ncp_sock, dummy, len, MSG_DONTWAIT); | |
498 | } | |
499 | if (result < 0) { | |
500 | return result; | |
501 | } | |
502 | if (result > len) { | |
503 | printk(KERN_ERR "ncpfs: tcp: bug in recvmsg (%u > %Zu)\n", result, len); | |
504 | return -EIO; | |
505 | } | |
506 | return result; | |
507 | } | |
508 | ||
509 | static int __ncptcp_rcv_proc(struct ncp_server *server) | |
510 | { | |
511 | /* We have to check the result, so store the complete header */ | |
512 | while (1) { | |
513 | int result; | |
514 | struct ncp_request_reply *req; | |
515 | int datalen; | |
516 | int type; | |
517 | ||
518 | while (server->rcv.len) { | |
519 | result = do_tcp_rcv(server, server->rcv.ptr, server->rcv.len); | |
520 | if (result == -EAGAIN) { | |
521 | return 0; | |
522 | } | |
523 | if (result <= 0) { | |
524 | req = server->rcv.creq; | |
525 | if (req) { | |
526 | __ncp_abort_request(server, req, -EIO); | |
527 | } else { | |
528 | __ncptcp_abort(server); | |
529 | } | |
530 | if (result < 0) { | |
531 | printk(KERN_ERR "ncpfs: tcp: error in recvmsg: %d\n", result); | |
532 | } else { | |
533 | DPRINTK(KERN_ERR "ncpfs: tcp: EOF\n"); | |
534 | } | |
535 | return -EIO; | |
536 | } | |
537 | if (server->rcv.ptr) { | |
538 | server->rcv.ptr += result; | |
539 | } | |
540 | server->rcv.len -= result; | |
541 | } | |
542 | switch (server->rcv.state) { | |
543 | case 0: | |
544 | if (server->rcv.buf.magic != htonl(NCP_TCP_RCVD_MAGIC)) { | |
545 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply type %08X\n", ntohl(server->rcv.buf.magic)); | |
546 | __ncptcp_abort(server); | |
547 | return -EIO; | |
548 | } | |
549 | datalen = ntohl(server->rcv.buf.len) & 0x0FFFFFFF; | |
550 | if (datalen < 10) { | |
551 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen); | |
552 | __ncptcp_abort(server); | |
553 | return -EIO; | |
554 | } | |
555 | #ifdef CONFIG_NCPFS_PACKET_SIGNING | |
556 | if (server->sign_active) { | |
557 | if (datalen < 18) { | |
558 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen); | |
559 | __ncptcp_abort(server); | |
560 | return -EIO; | |
561 | } | |
562 | server->rcv.buf.len = datalen - 8; | |
563 | server->rcv.ptr = (unsigned char*)&server->rcv.buf.p1; | |
564 | server->rcv.len = 8; | |
565 | server->rcv.state = 4; | |
566 | break; | |
567 | } | |
568 | #endif | |
569 | type = ntohs(server->rcv.buf.type); | |
570 | #ifdef CONFIG_NCPFS_PACKET_SIGNING | |
571 | cont:; | |
572 | #endif | |
573 | if (type != NCP_REPLY) { | |
574 | if (datalen - 8 <= sizeof(server->unexpected_packet.data)) { | |
575 | *(__u16*)(server->unexpected_packet.data) = htons(type); | |
576 | server->unexpected_packet.len = datalen - 8; | |
577 | ||
578 | server->rcv.state = 5; | |
579 | server->rcv.ptr = server->unexpected_packet.data + 2; | |
580 | server->rcv.len = datalen - 10; | |
581 | break; | |
582 | } | |
583 | DPRINTK("ncpfs: tcp: Unexpected NCP type %02X\n", type); | |
584 | skipdata2:; | |
585 | server->rcv.state = 2; | |
586 | skipdata:; | |
587 | server->rcv.ptr = NULL; | |
588 | server->rcv.len = datalen - 10; | |
589 | break; | |
590 | } | |
591 | req = server->rcv.creq; | |
592 | if (!req) { | |
593 | DPRINTK(KERN_ERR "ncpfs: Reply without appropriate request\n"); | |
594 | goto skipdata2; | |
595 | } | |
596 | if (datalen > req->datalen + 8) { | |
597 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d (expected at most %Zd)\n", datalen, req->datalen + 8); | |
598 | server->rcv.state = 3; | |
599 | goto skipdata; | |
600 | } | |
601 | req->datalen = datalen - 8; | |
602 | req->reply_buf->type = NCP_REPLY; | |
603 | server->rcv.ptr = (unsigned char*)(req->reply_buf) + 2; | |
604 | server->rcv.len = datalen - 10; | |
605 | server->rcv.state = 1; | |
606 | break; | |
607 | #ifdef CONFIG_NCPFS_PACKET_SIGNING | |
608 | case 4: | |
609 | datalen = server->rcv.buf.len; | |
610 | type = ntohs(server->rcv.buf.type2); | |
611 | goto cont; | |
612 | #endif | |
613 | case 1: | |
614 | req = server->rcv.creq; | |
615 | if (req->tx_type != NCP_ALLOC_SLOT_REQUEST) { | |
616 | if (req->reply_buf->sequence != server->sequence) { | |
617 | printk(KERN_ERR "ncpfs: tcp: Bad sequence number\n"); | |
618 | __ncp_abort_request(server, req, -EIO); | |
619 | return -EIO; | |
620 | } | |
621 | if ((req->reply_buf->conn_low | (req->reply_buf->conn_high << 8)) != server->connection) { | |
622 | printk(KERN_ERR "ncpfs: tcp: Connection number mismatch\n"); | |
623 | __ncp_abort_request(server, req, -EIO); | |
624 | return -EIO; | |
625 | } | |
626 | } | |
627 | #ifdef CONFIG_NCPFS_PACKET_SIGNING | |
628 | if (server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) { | |
629 | if (sign_verify_reply(server, (unsigned char*)(req->reply_buf) + 6, req->datalen - 6, cpu_to_be32(req->datalen + 16), &server->rcv.buf.type)) { | |
630 | printk(KERN_ERR "ncpfs: tcp: Signature violation\n"); | |
631 | __ncp_abort_request(server, req, -EIO); | |
632 | return -EIO; | |
633 | } | |
634 | } | |
635 | #endif | |
636 | ncp_finish_request(req, req->datalen); | |
637 | nextreq:; | |
638 | __ncp_next_request(server); | |
639 | case 2: | |
640 | next:; | |
641 | server->rcv.ptr = (unsigned char*)&server->rcv.buf; | |
642 | server->rcv.len = 10; | |
643 | server->rcv.state = 0; | |
644 | break; | |
645 | case 3: | |
646 | ncp_finish_request(server->rcv.creq, -EIO); | |
647 | goto nextreq; | |
648 | case 5: | |
649 | info_server(server, 0, server->unexpected_packet.data, server->unexpected_packet.len); | |
650 | goto next; | |
651 | } | |
652 | } | |
653 | } | |
654 | ||
655 | void ncp_tcp_rcv_proc(void *s) | |
656 | { | |
657 | struct ncp_server *server = s; | |
658 | ||
8e3f9045 | 659 | mutex_lock(&server->rcv.creq_mutex); |
1da177e4 | 660 | __ncptcp_rcv_proc(server); |
8e3f9045 | 661 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
662 | } |
663 | ||
664 | void ncp_tcp_tx_proc(void *s) | |
665 | { | |
666 | struct ncp_server *server = s; | |
667 | ||
8e3f9045 | 668 | mutex_lock(&server->rcv.creq_mutex); |
1da177e4 | 669 | __ncptcp_try_send(server); |
8e3f9045 | 670 | mutex_unlock(&server->rcv.creq_mutex); |
1da177e4 LT |
671 | } |
672 | ||
673 | static int do_ncp_rpc_call(struct ncp_server *server, int size, | |
674 | struct ncp_reply_header* reply_buf, int max_reply_size) | |
675 | { | |
676 | int result; | |
677 | struct ncp_request_reply req; | |
678 | ||
679 | ncp_init_req(&req); | |
680 | req.reply_buf = reply_buf; | |
681 | req.datalen = max_reply_size; | |
682 | req.tx_iov[1].iov_base = server->packet; | |
683 | req.tx_iov[1].iov_len = size; | |
684 | req.tx_iovlen = 1; | |
685 | req.tx_totallen = size; | |
686 | req.tx_type = *(u_int16_t*)server->packet; | |
687 | ||
688 | result = ncp_add_request(server, &req); | |
689 | if (result < 0) { | |
690 | return result; | |
691 | } | |
692 | if (wait_event_interruptible(req.wq, req.status == RQ_DONE)) { | |
693 | ncp_abort_request(server, &req, -EIO); | |
694 | } | |
695 | return req.result; | |
696 | } | |
697 | ||
698 | /* | |
699 | * We need the server to be locked here, so check! | |
700 | */ | |
701 | ||
702 | static int ncp_do_request(struct ncp_server *server, int size, | |
703 | void* reply, int max_reply_size) | |
704 | { | |
705 | int result; | |
706 | ||
707 | if (server->lock == 0) { | |
708 | printk(KERN_ERR "ncpfs: Server not locked!\n"); | |
709 | return -EIO; | |
710 | } | |
711 | if (!ncp_conn_valid(server)) { | |
712 | printk(KERN_ERR "ncpfs: Connection invalid!\n"); | |
713 | return -EIO; | |
714 | } | |
715 | { | |
716 | sigset_t old_set; | |
717 | unsigned long mask, flags; | |
718 | ||
719 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
720 | old_set = current->blocked; | |
721 | if (current->flags & PF_EXITING) | |
722 | mask = 0; | |
723 | else | |
724 | mask = sigmask(SIGKILL); | |
725 | if (server->m.flags & NCP_MOUNT_INTR) { | |
726 | /* FIXME: This doesn't seem right at all. So, like, | |
727 | we can't handle SIGINT and get whatever to stop? | |
728 | What if we've blocked it ourselves? What about | |
729 | alarms? Why, in fact, are we mucking with the | |
730 | sigmask at all? -- r~ */ | |
731 | if (current->sighand->action[SIGINT - 1].sa.sa_handler == SIG_DFL) | |
732 | mask |= sigmask(SIGINT); | |
733 | if (current->sighand->action[SIGQUIT - 1].sa.sa_handler == SIG_DFL) | |
734 | mask |= sigmask(SIGQUIT); | |
735 | } | |
736 | siginitsetinv(¤t->blocked, mask); | |
737 | recalc_sigpending(); | |
738 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
739 | ||
740 | result = do_ncp_rpc_call(server, size, reply, max_reply_size); | |
741 | ||
742 | spin_lock_irqsave(¤t->sighand->siglock, flags); | |
743 | current->blocked = old_set; | |
744 | recalc_sigpending(); | |
745 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); | |
746 | } | |
747 | ||
748 | DDPRINTK("do_ncp_rpc_call returned %d\n", result); | |
749 | ||
750 | if (result < 0) { | |
751 | /* There was a problem with I/O, so the connections is | |
752 | * no longer usable. */ | |
753 | ncp_invalidate_conn(server); | |
754 | } | |
755 | return result; | |
756 | } | |
757 | ||
758 | /* ncp_do_request assures that at least a complete reply header is | |
759 | * received. It assumes that server->current_size contains the ncp | |
760 | * request size | |
761 | */ | |
762 | int ncp_request2(struct ncp_server *server, int function, | |
763 | void* rpl, int size) | |
764 | { | |
765 | struct ncp_request_header *h; | |
766 | struct ncp_reply_header* reply = rpl; | |
767 | int result; | |
768 | ||
769 | h = (struct ncp_request_header *) (server->packet); | |
770 | if (server->has_subfunction != 0) { | |
771 | *(__u16 *) & (h->data[0]) = htons(server->current_size - sizeof(*h) - 2); | |
772 | } | |
773 | h->type = NCP_REQUEST; | |
774 | /* | |
775 | * The server shouldn't know or care what task is making a | |
776 | * request, so we always use the same task number. | |
777 | */ | |
778 | h->task = 2; /* (current->pid) & 0xff; */ | |
779 | h->function = function; | |
780 | ||
781 | result = ncp_do_request(server, server->current_size, reply, size); | |
782 | if (result < 0) { | |
783 | DPRINTK("ncp_request_error: %d\n", result); | |
784 | goto out; | |
785 | } | |
786 | server->completion = reply->completion_code; | |
787 | server->conn_status = reply->connection_state; | |
788 | server->reply_size = result; | |
789 | server->ncp_reply_size = result - sizeof(struct ncp_reply_header); | |
790 | ||
791 | result = reply->completion_code; | |
792 | ||
793 | if (result != 0) | |
794 | PPRINTK("ncp_request: completion code=%x\n", result); | |
795 | out: | |
796 | return result; | |
797 | } | |
798 | ||
799 | int ncp_connect(struct ncp_server *server) | |
800 | { | |
801 | struct ncp_request_header *h; | |
802 | int result; | |
803 | ||
804 | server->connection = 0xFFFF; | |
805 | server->sequence = 255; | |
806 | ||
807 | h = (struct ncp_request_header *) (server->packet); | |
808 | h->type = NCP_ALLOC_SLOT_REQUEST; | |
809 | h->task = 2; /* see above */ | |
810 | h->function = 0; | |
811 | ||
812 | result = ncp_do_request(server, sizeof(*h), server->packet, server->packet_size); | |
813 | if (result < 0) | |
814 | goto out; | |
815 | server->connection = h->conn_low + (h->conn_high * 256); | |
816 | result = 0; | |
817 | out: | |
818 | return result; | |
819 | } | |
820 | ||
821 | int ncp_disconnect(struct ncp_server *server) | |
822 | { | |
823 | struct ncp_request_header *h; | |
824 | ||
825 | h = (struct ncp_request_header *) (server->packet); | |
826 | h->type = NCP_DEALLOC_SLOT_REQUEST; | |
827 | h->task = 2; /* see above */ | |
828 | h->function = 0; | |
829 | ||
830 | return ncp_do_request(server, sizeof(*h), server->packet, server->packet_size); | |
831 | } | |
832 | ||
833 | void ncp_lock_server(struct ncp_server *server) | |
834 | { | |
8e3f9045 | 835 | mutex_lock(&server->mutex); |
1da177e4 LT |
836 | if (server->lock) |
837 | printk(KERN_WARNING "ncp_lock_server: was locked!\n"); | |
838 | server->lock = 1; | |
839 | } | |
840 | ||
841 | void ncp_unlock_server(struct ncp_server *server) | |
842 | { | |
843 | if (!server->lock) { | |
844 | printk(KERN_WARNING "ncp_unlock_server: was not locked!\n"); | |
845 | return; | |
846 | } | |
847 | server->lock = 0; | |
8e3f9045 | 848 | mutex_unlock(&server->mutex); |
1da177e4 | 849 | } |