Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 17 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <asm/uaccess.h> |
| 19 | #include <linux/in.h> |
| 20 | #include <linux/net.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/netdevice.h> |
| 23 | #include <linux/signal.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 24 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <net/scm.h> |
| 26 | #include <net/sock.h> |
| 27 | #include <linux/ipx.h> |
| 28 | #include <linux/poll.h> |
| 29 | #include <linux/file.h> |
| 30 | |
| 31 | #include <linux/ncp_fs.h> |
| 32 | |
| 33 | #include "ncpsign_kernel.h" |
| 34 | |
| 35 | static int _recv(struct socket *sock, void *buf, int size, unsigned flags) |
| 36 | { |
| 37 | struct msghdr msg = {NULL, }; |
| 38 | struct kvec iov = {buf, size}; |
| 39 | return kernel_recvmsg(sock, &msg, &iov, 1, size, flags); |
| 40 | } |
| 41 | |
| 42 | static inline int do_send(struct socket *sock, struct kvec *vec, int count, |
| 43 | int len, unsigned flags) |
| 44 | { |
| 45 | struct msghdr msg = { .msg_flags = flags }; |
| 46 | return kernel_sendmsg(sock, &msg, vec, count, len); |
| 47 | } |
| 48 | |
| 49 | static int _send(struct socket *sock, const void *buff, int len) |
| 50 | { |
| 51 | struct kvec vec; |
| 52 | vec.iov_base = (void *) buff; |
| 53 | vec.iov_len = len; |
| 54 | return do_send(sock, &vec, 1, len, 0); |
| 55 | } |
| 56 | |
| 57 | struct ncp_request_reply { |
| 58 | struct list_head req; |
| 59 | wait_queue_head_t wq; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 60 | atomic_t refs; |
| 61 | unsigned char* reply_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | size_t datalen; |
| 63 | int result; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 64 | enum { RQ_DONE, RQ_INPROGRESS, RQ_QUEUED, RQ_IDLE, RQ_ABANDONED } status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | struct kvec* tx_ciov; |
| 66 | size_t tx_totallen; |
| 67 | size_t tx_iovlen; |
| 68 | struct kvec tx_iov[3]; |
| 69 | u_int16_t tx_type; |
| 70 | u_int32_t sign[6]; |
| 71 | }; |
| 72 | |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 73 | static inline struct ncp_request_reply* ncp_alloc_req(void) |
| 74 | { |
| 75 | struct ncp_request_reply *req; |
| 76 | |
| 77 | req = kmalloc(sizeof(struct ncp_request_reply), GFP_KERNEL); |
| 78 | if (!req) |
| 79 | return NULL; |
| 80 | |
| 81 | init_waitqueue_head(&req->wq); |
| 82 | atomic_set(&req->refs, (1)); |
| 83 | req->status = RQ_IDLE; |
| 84 | |
| 85 | return req; |
| 86 | } |
| 87 | |
| 88 | static void ncp_req_get(struct ncp_request_reply *req) |
| 89 | { |
| 90 | atomic_inc(&req->refs); |
| 91 | } |
| 92 | |
| 93 | static void ncp_req_put(struct ncp_request_reply *req) |
| 94 | { |
| 95 | if (atomic_dec_and_test(&req->refs)) |
| 96 | kfree(req); |
| 97 | } |
| 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | void ncp_tcp_data_ready(struct sock *sk, int len) |
| 100 | { |
| 101 | struct ncp_server *server = sk->sk_user_data; |
| 102 | |
| 103 | server->data_ready(sk, len); |
| 104 | schedule_work(&server->rcv.tq); |
| 105 | } |
| 106 | |
| 107 | void ncp_tcp_error_report(struct sock *sk) |
| 108 | { |
| 109 | struct ncp_server *server = sk->sk_user_data; |
| 110 | |
| 111 | server->error_report(sk); |
| 112 | schedule_work(&server->rcv.tq); |
| 113 | } |
| 114 | |
| 115 | void ncp_tcp_write_space(struct sock *sk) |
| 116 | { |
| 117 | struct ncp_server *server = sk->sk_user_data; |
| 118 | |
| 119 | /* We do not need any locking: we first set tx.creq, and then we do sendmsg, |
| 120 | not vice versa... */ |
| 121 | server->write_space(sk); |
| 122 | if (server->tx.creq) |
| 123 | schedule_work(&server->tx.tq); |
| 124 | } |
| 125 | |
| 126 | void ncpdgram_timeout_call(unsigned long v) |
| 127 | { |
| 128 | struct ncp_server *server = (void*)v; |
| 129 | |
| 130 | schedule_work(&server->timeout_tq); |
| 131 | } |
| 132 | |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 133 | static inline void ncp_finish_request(struct ncp_server *server, struct ncp_request_reply *req, int result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | { |
| 135 | req->result = result; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 136 | if (req->status != RQ_ABANDONED) |
| 137 | memcpy(req->reply_buf, server->rxbuf, req->datalen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | req->status = RQ_DONE; |
| 139 | wake_up_all(&req->wq); |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 140 | ncp_req_put(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 143 | static void __abort_ncp_connection(struct ncp_server *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | { |
| 145 | struct ncp_request_reply *req; |
| 146 | |
| 147 | ncp_invalidate_conn(server); |
| 148 | del_timer(&server->timeout_tm); |
| 149 | while (!list_empty(&server->tx.requests)) { |
| 150 | req = list_entry(server->tx.requests.next, struct ncp_request_reply, req); |
| 151 | |
| 152 | list_del_init(&req->req); |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 153 | ncp_finish_request(server, req, -EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | } |
| 155 | req = server->rcv.creq; |
| 156 | if (req) { |
| 157 | server->rcv.creq = NULL; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 158 | ncp_finish_request(server, req, -EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | server->rcv.ptr = NULL; |
| 160 | server->rcv.state = 0; |
| 161 | } |
| 162 | req = server->tx.creq; |
| 163 | if (req) { |
| 164 | server->tx.creq = NULL; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 165 | ncp_finish_request(server, req, -EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | } |
| 167 | } |
| 168 | |
| 169 | static inline int get_conn_number(struct ncp_reply_header *rp) |
| 170 | { |
| 171 | return rp->conn_low | (rp->conn_high << 8); |
| 172 | } |
| 173 | |
| 174 | static inline void __ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err) |
| 175 | { |
| 176 | /* If req is done, we got signal, but we also received answer... */ |
| 177 | switch (req->status) { |
| 178 | case RQ_IDLE: |
| 179 | case RQ_DONE: |
| 180 | break; |
| 181 | case RQ_QUEUED: |
| 182 | list_del_init(&req->req); |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 183 | ncp_finish_request(server, req, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | break; |
| 185 | case RQ_INPROGRESS: |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 186 | req->status = RQ_ABANDONED; |
| 187 | break; |
| 188 | case RQ_ABANDONED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | break; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | static inline void ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err) |
| 194 | { |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 195 | mutex_lock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | __ncp_abort_request(server, req, err); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 197 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static inline void __ncptcp_abort(struct ncp_server *server) |
| 201 | { |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 202 | __abort_ncp_connection(server); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | static int ncpdgram_send(struct socket *sock, struct ncp_request_reply *req) |
| 206 | { |
| 207 | struct kvec vec[3]; |
| 208 | /* sock_sendmsg updates iov pointers for us :-( */ |
| 209 | memcpy(vec, req->tx_ciov, req->tx_iovlen * sizeof(vec[0])); |
| 210 | return do_send(sock, vec, req->tx_iovlen, |
| 211 | req->tx_totallen, MSG_DONTWAIT); |
| 212 | } |
| 213 | |
| 214 | static void __ncptcp_try_send(struct ncp_server *server) |
| 215 | { |
| 216 | struct ncp_request_reply *rq; |
| 217 | struct kvec *iov; |
| 218 | struct kvec iovc[3]; |
| 219 | int result; |
| 220 | |
| 221 | rq = server->tx.creq; |
| 222 | if (!rq) |
| 223 | return; |
| 224 | |
| 225 | /* sock_sendmsg updates iov pointers for us :-( */ |
| 226 | memcpy(iovc, rq->tx_ciov, rq->tx_iovlen * sizeof(iov[0])); |
| 227 | result = do_send(server->ncp_sock, iovc, rq->tx_iovlen, |
| 228 | rq->tx_totallen, MSG_NOSIGNAL | MSG_DONTWAIT); |
| 229 | |
| 230 | if (result == -EAGAIN) |
| 231 | return; |
| 232 | |
| 233 | if (result < 0) { |
| 234 | printk(KERN_ERR "ncpfs: tcp: Send failed: %d\n", result); |
| 235 | __ncp_abort_request(server, rq, result); |
| 236 | return; |
| 237 | } |
| 238 | if (result >= rq->tx_totallen) { |
| 239 | server->rcv.creq = rq; |
| 240 | server->tx.creq = NULL; |
| 241 | return; |
| 242 | } |
| 243 | rq->tx_totallen -= result; |
| 244 | iov = rq->tx_ciov; |
| 245 | while (iov->iov_len <= result) { |
| 246 | result -= iov->iov_len; |
| 247 | iov++; |
| 248 | rq->tx_iovlen--; |
| 249 | } |
| 250 | iov->iov_base += result; |
| 251 | iov->iov_len -= result; |
| 252 | rq->tx_ciov = iov; |
| 253 | } |
| 254 | |
| 255 | static inline void ncp_init_header(struct ncp_server *server, struct ncp_request_reply *req, struct ncp_request_header *h) |
| 256 | { |
| 257 | req->status = RQ_INPROGRESS; |
| 258 | h->conn_low = server->connection; |
| 259 | h->conn_high = server->connection >> 8; |
| 260 | h->sequence = ++server->sequence; |
| 261 | } |
| 262 | |
| 263 | static void ncpdgram_start_request(struct ncp_server *server, struct ncp_request_reply *req) |
| 264 | { |
| 265 | size_t signlen; |
| 266 | struct ncp_request_header* h; |
| 267 | |
| 268 | req->tx_ciov = req->tx_iov + 1; |
| 269 | |
| 270 | h = req->tx_iov[1].iov_base; |
| 271 | ncp_init_header(server, req, h); |
| 272 | signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1, |
| 273 | req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1, |
| 274 | cpu_to_le32(req->tx_totallen), req->sign); |
| 275 | if (signlen) { |
| 276 | req->tx_ciov[1].iov_base = req->sign; |
| 277 | req->tx_ciov[1].iov_len = signlen; |
| 278 | req->tx_iovlen += 1; |
| 279 | req->tx_totallen += signlen; |
| 280 | } |
| 281 | server->rcv.creq = req; |
| 282 | server->timeout_last = server->m.time_out; |
| 283 | server->timeout_retries = server->m.retry_count; |
| 284 | ncpdgram_send(server->ncp_sock, req); |
| 285 | mod_timer(&server->timeout_tm, jiffies + server->m.time_out); |
| 286 | } |
| 287 | |
| 288 | #define NCP_TCP_XMIT_MAGIC (0x446D6454) |
| 289 | #define NCP_TCP_XMIT_VERSION (1) |
| 290 | #define NCP_TCP_RCVD_MAGIC (0x744E6350) |
| 291 | |
| 292 | static void ncptcp_start_request(struct ncp_server *server, struct ncp_request_reply *req) |
| 293 | { |
| 294 | size_t signlen; |
| 295 | struct ncp_request_header* h; |
| 296 | |
| 297 | req->tx_ciov = req->tx_iov; |
| 298 | h = req->tx_iov[1].iov_base; |
| 299 | ncp_init_header(server, req, h); |
| 300 | signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1, |
| 301 | req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1, |
| 302 | cpu_to_be32(req->tx_totallen + 24), req->sign + 4) + 16; |
| 303 | |
| 304 | req->sign[0] = htonl(NCP_TCP_XMIT_MAGIC); |
| 305 | req->sign[1] = htonl(req->tx_totallen + signlen); |
| 306 | req->sign[2] = htonl(NCP_TCP_XMIT_VERSION); |
| 307 | req->sign[3] = htonl(req->datalen + 8); |
| 308 | req->tx_iov[0].iov_base = req->sign; |
| 309 | req->tx_iov[0].iov_len = signlen; |
| 310 | req->tx_iovlen += 1; |
| 311 | req->tx_totallen += signlen; |
| 312 | |
| 313 | server->tx.creq = req; |
| 314 | __ncptcp_try_send(server); |
| 315 | } |
| 316 | |
| 317 | static inline void __ncp_start_request(struct ncp_server *server, struct ncp_request_reply *req) |
| 318 | { |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 319 | /* we copy the data so that we do not depend on the caller |
| 320 | staying alive */ |
| 321 | memcpy(server->txbuf, req->tx_iov[1].iov_base, req->tx_iov[1].iov_len); |
| 322 | req->tx_iov[1].iov_base = server->txbuf; |
| 323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | if (server->ncp_sock->type == SOCK_STREAM) |
| 325 | ncptcp_start_request(server, req); |
| 326 | else |
| 327 | ncpdgram_start_request(server, req); |
| 328 | } |
| 329 | |
| 330 | static int ncp_add_request(struct ncp_server *server, struct ncp_request_reply *req) |
| 331 | { |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 332 | mutex_lock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | if (!ncp_conn_valid(server)) { |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 334 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | printk(KERN_ERR "ncpfs: tcp: Server died\n"); |
| 336 | return -EIO; |
| 337 | } |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 338 | ncp_req_get(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (server->tx.creq || server->rcv.creq) { |
| 340 | req->status = RQ_QUEUED; |
| 341 | list_add_tail(&req->req, &server->tx.requests); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 342 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | return 0; |
| 344 | } |
| 345 | __ncp_start_request(server, req); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 346 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | static void __ncp_next_request(struct ncp_server *server) |
| 351 | { |
| 352 | struct ncp_request_reply *req; |
| 353 | |
| 354 | server->rcv.creq = NULL; |
| 355 | if (list_empty(&server->tx.requests)) { |
| 356 | return; |
| 357 | } |
| 358 | req = list_entry(server->tx.requests.next, struct ncp_request_reply, req); |
| 359 | list_del_init(&req->req); |
| 360 | __ncp_start_request(server, req); |
| 361 | } |
| 362 | |
| 363 | static void info_server(struct ncp_server *server, unsigned int id, const void * data, size_t len) |
| 364 | { |
| 365 | if (server->info_sock) { |
| 366 | struct kvec iov[2]; |
| 367 | __be32 hdr[2]; |
| 368 | |
| 369 | hdr[0] = cpu_to_be32(len + 8); |
| 370 | hdr[1] = cpu_to_be32(id); |
| 371 | |
| 372 | iov[0].iov_base = hdr; |
| 373 | iov[0].iov_len = 8; |
| 374 | iov[1].iov_base = (void *) data; |
| 375 | iov[1].iov_len = len; |
| 376 | |
| 377 | do_send(server->info_sock, iov, 2, len + 8, MSG_NOSIGNAL); |
| 378 | } |
| 379 | } |
| 380 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 381 | void ncpdgram_rcv_proc(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 383 | struct ncp_server *server = |
| 384 | container_of(work, struct ncp_server, rcv.tq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | struct socket* sock; |
| 386 | |
| 387 | sock = server->ncp_sock; |
| 388 | |
| 389 | while (1) { |
| 390 | struct ncp_reply_header reply; |
| 391 | int result; |
| 392 | |
| 393 | result = _recv(sock, &reply, sizeof(reply), MSG_PEEK | MSG_DONTWAIT); |
| 394 | if (result < 0) { |
| 395 | break; |
| 396 | } |
| 397 | if (result >= sizeof(reply)) { |
| 398 | struct ncp_request_reply *req; |
| 399 | |
| 400 | if (reply.type == NCP_WATCHDOG) { |
| 401 | unsigned char buf[10]; |
| 402 | |
| 403 | if (server->connection != get_conn_number(&reply)) { |
| 404 | goto drop; |
| 405 | } |
| 406 | result = _recv(sock, buf, sizeof(buf), MSG_DONTWAIT); |
| 407 | if (result < 0) { |
| 408 | DPRINTK("recv failed with %d\n", result); |
| 409 | continue; |
| 410 | } |
| 411 | if (result < 10) { |
| 412 | DPRINTK("too short (%u) watchdog packet\n", result); |
| 413 | continue; |
| 414 | } |
| 415 | if (buf[9] != '?') { |
| 416 | DPRINTK("bad signature (%02X) in watchdog packet\n", buf[9]); |
| 417 | continue; |
| 418 | } |
| 419 | buf[9] = 'Y'; |
| 420 | _send(sock, buf, sizeof(buf)); |
| 421 | continue; |
| 422 | } |
| 423 | if (reply.type != NCP_POSITIVE_ACK && reply.type != NCP_REPLY) { |
| 424 | result = _recv(sock, server->unexpected_packet.data, sizeof(server->unexpected_packet.data), MSG_DONTWAIT); |
| 425 | if (result < 0) { |
| 426 | continue; |
| 427 | } |
| 428 | info_server(server, 0, server->unexpected_packet.data, result); |
| 429 | continue; |
| 430 | } |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 431 | mutex_lock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | req = server->rcv.creq; |
| 433 | if (req && (req->tx_type == NCP_ALLOC_SLOT_REQUEST || (server->sequence == reply.sequence && |
| 434 | server->connection == get_conn_number(&reply)))) { |
| 435 | if (reply.type == NCP_POSITIVE_ACK) { |
| 436 | server->timeout_retries = server->m.retry_count; |
| 437 | server->timeout_last = NCP_MAX_RPC_TIMEOUT; |
| 438 | mod_timer(&server->timeout_tm, jiffies + NCP_MAX_RPC_TIMEOUT); |
| 439 | } else if (reply.type == NCP_REPLY) { |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 440 | result = _recv(sock, server->rxbuf, req->datalen, MSG_DONTWAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | #ifdef CONFIG_NCPFS_PACKET_SIGNING |
| 442 | if (result >= 0 && server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) { |
| 443 | if (result < 8 + 8) { |
| 444 | result = -EIO; |
| 445 | } else { |
| 446 | unsigned int hdrl; |
| 447 | |
| 448 | result -= 8; |
| 449 | hdrl = sock->sk->sk_family == AF_INET ? 8 : 6; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 450 | if (sign_verify_reply(server, server->rxbuf + hdrl, result - hdrl, cpu_to_le32(result), server->rxbuf + result)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | printk(KERN_INFO "ncpfs: Signature violation\n"); |
| 452 | result = -EIO; |
| 453 | } |
| 454 | } |
| 455 | } |
| 456 | #endif |
| 457 | del_timer(&server->timeout_tm); |
| 458 | server->rcv.creq = NULL; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 459 | ncp_finish_request(server, req, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | __ncp_next_request(server); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 461 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | continue; |
| 463 | } |
| 464 | } |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 465 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | } |
| 467 | drop:; |
| 468 | _recv(sock, &reply, sizeof(reply), MSG_DONTWAIT); |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | static void __ncpdgram_timeout_proc(struct ncp_server *server) |
| 473 | { |
| 474 | /* If timer is pending, we are processing another request... */ |
| 475 | if (!timer_pending(&server->timeout_tm)) { |
| 476 | struct ncp_request_reply* req; |
| 477 | |
| 478 | req = server->rcv.creq; |
| 479 | if (req) { |
| 480 | int timeout; |
| 481 | |
| 482 | if (server->m.flags & NCP_MOUNT_SOFT) { |
| 483 | if (server->timeout_retries-- == 0) { |
| 484 | __ncp_abort_request(server, req, -ETIMEDOUT); |
| 485 | return; |
| 486 | } |
| 487 | } |
| 488 | /* Ignore errors */ |
| 489 | ncpdgram_send(server->ncp_sock, req); |
| 490 | timeout = server->timeout_last << 1; |
| 491 | if (timeout > NCP_MAX_RPC_TIMEOUT) { |
| 492 | timeout = NCP_MAX_RPC_TIMEOUT; |
| 493 | } |
| 494 | server->timeout_last = timeout; |
| 495 | mod_timer(&server->timeout_tm, jiffies + timeout); |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 500 | void ncpdgram_timeout_proc(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 502 | struct ncp_server *server = |
| 503 | container_of(work, struct ncp_server, timeout_tq); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 504 | mutex_lock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | __ncpdgram_timeout_proc(server); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 506 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } |
| 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | static int do_tcp_rcv(struct ncp_server *server, void *buffer, size_t len) |
| 510 | { |
| 511 | int result; |
| 512 | |
| 513 | if (buffer) { |
| 514 | result = _recv(server->ncp_sock, buffer, len, MSG_DONTWAIT); |
| 515 | } else { |
| 516 | static unsigned char dummy[1024]; |
| 517 | |
| 518 | if (len > sizeof(dummy)) { |
| 519 | len = sizeof(dummy); |
| 520 | } |
| 521 | result = _recv(server->ncp_sock, dummy, len, MSG_DONTWAIT); |
| 522 | } |
| 523 | if (result < 0) { |
| 524 | return result; |
| 525 | } |
| 526 | if (result > len) { |
| 527 | printk(KERN_ERR "ncpfs: tcp: bug in recvmsg (%u > %Zu)\n", result, len); |
| 528 | return -EIO; |
| 529 | } |
| 530 | return result; |
| 531 | } |
| 532 | |
| 533 | static int __ncptcp_rcv_proc(struct ncp_server *server) |
| 534 | { |
| 535 | /* We have to check the result, so store the complete header */ |
| 536 | while (1) { |
| 537 | int result; |
| 538 | struct ncp_request_reply *req; |
| 539 | int datalen; |
| 540 | int type; |
| 541 | |
| 542 | while (server->rcv.len) { |
| 543 | result = do_tcp_rcv(server, server->rcv.ptr, server->rcv.len); |
| 544 | if (result == -EAGAIN) { |
| 545 | return 0; |
| 546 | } |
| 547 | if (result <= 0) { |
| 548 | req = server->rcv.creq; |
| 549 | if (req) { |
| 550 | __ncp_abort_request(server, req, -EIO); |
| 551 | } else { |
| 552 | __ncptcp_abort(server); |
| 553 | } |
| 554 | if (result < 0) { |
| 555 | printk(KERN_ERR "ncpfs: tcp: error in recvmsg: %d\n", result); |
| 556 | } else { |
| 557 | DPRINTK(KERN_ERR "ncpfs: tcp: EOF\n"); |
| 558 | } |
| 559 | return -EIO; |
| 560 | } |
| 561 | if (server->rcv.ptr) { |
| 562 | server->rcv.ptr += result; |
| 563 | } |
| 564 | server->rcv.len -= result; |
| 565 | } |
| 566 | switch (server->rcv.state) { |
| 567 | case 0: |
| 568 | if (server->rcv.buf.magic != htonl(NCP_TCP_RCVD_MAGIC)) { |
| 569 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply type %08X\n", ntohl(server->rcv.buf.magic)); |
| 570 | __ncptcp_abort(server); |
| 571 | return -EIO; |
| 572 | } |
| 573 | datalen = ntohl(server->rcv.buf.len) & 0x0FFFFFFF; |
| 574 | if (datalen < 10) { |
| 575 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen); |
| 576 | __ncptcp_abort(server); |
| 577 | return -EIO; |
| 578 | } |
| 579 | #ifdef CONFIG_NCPFS_PACKET_SIGNING |
| 580 | if (server->sign_active) { |
| 581 | if (datalen < 18) { |
| 582 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen); |
| 583 | __ncptcp_abort(server); |
| 584 | return -EIO; |
| 585 | } |
| 586 | server->rcv.buf.len = datalen - 8; |
| 587 | server->rcv.ptr = (unsigned char*)&server->rcv.buf.p1; |
| 588 | server->rcv.len = 8; |
| 589 | server->rcv.state = 4; |
| 590 | break; |
| 591 | } |
| 592 | #endif |
| 593 | type = ntohs(server->rcv.buf.type); |
| 594 | #ifdef CONFIG_NCPFS_PACKET_SIGNING |
| 595 | cont:; |
| 596 | #endif |
| 597 | if (type != NCP_REPLY) { |
| 598 | if (datalen - 8 <= sizeof(server->unexpected_packet.data)) { |
| 599 | *(__u16*)(server->unexpected_packet.data) = htons(type); |
| 600 | server->unexpected_packet.len = datalen - 8; |
| 601 | |
| 602 | server->rcv.state = 5; |
| 603 | server->rcv.ptr = server->unexpected_packet.data + 2; |
| 604 | server->rcv.len = datalen - 10; |
| 605 | break; |
| 606 | } |
| 607 | DPRINTK("ncpfs: tcp: Unexpected NCP type %02X\n", type); |
| 608 | skipdata2:; |
| 609 | server->rcv.state = 2; |
| 610 | skipdata:; |
| 611 | server->rcv.ptr = NULL; |
| 612 | server->rcv.len = datalen - 10; |
| 613 | break; |
| 614 | } |
| 615 | req = server->rcv.creq; |
| 616 | if (!req) { |
| 617 | DPRINTK(KERN_ERR "ncpfs: Reply without appropriate request\n"); |
| 618 | goto skipdata2; |
| 619 | } |
| 620 | if (datalen > req->datalen + 8) { |
| 621 | printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d (expected at most %Zd)\n", datalen, req->datalen + 8); |
| 622 | server->rcv.state = 3; |
| 623 | goto skipdata; |
| 624 | } |
| 625 | req->datalen = datalen - 8; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 626 | ((struct ncp_reply_header*)server->rxbuf)->type = NCP_REPLY; |
| 627 | server->rcv.ptr = server->rxbuf + 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | server->rcv.len = datalen - 10; |
| 629 | server->rcv.state = 1; |
| 630 | break; |
| 631 | #ifdef CONFIG_NCPFS_PACKET_SIGNING |
| 632 | case 4: |
| 633 | datalen = server->rcv.buf.len; |
| 634 | type = ntohs(server->rcv.buf.type2); |
| 635 | goto cont; |
| 636 | #endif |
| 637 | case 1: |
| 638 | req = server->rcv.creq; |
| 639 | if (req->tx_type != NCP_ALLOC_SLOT_REQUEST) { |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 640 | if (((struct ncp_reply_header*)server->rxbuf)->sequence != server->sequence) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | printk(KERN_ERR "ncpfs: tcp: Bad sequence number\n"); |
| 642 | __ncp_abort_request(server, req, -EIO); |
| 643 | return -EIO; |
| 644 | } |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 645 | if ((((struct ncp_reply_header*)server->rxbuf)->conn_low | (((struct ncp_reply_header*)server->rxbuf)->conn_high << 8)) != server->connection) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | printk(KERN_ERR "ncpfs: tcp: Connection number mismatch\n"); |
| 647 | __ncp_abort_request(server, req, -EIO); |
| 648 | return -EIO; |
| 649 | } |
| 650 | } |
| 651 | #ifdef CONFIG_NCPFS_PACKET_SIGNING |
| 652 | if (server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) { |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 653 | if (sign_verify_reply(server, server->rxbuf + 6, req->datalen - 6, cpu_to_be32(req->datalen + 16), &server->rcv.buf.type)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | printk(KERN_ERR "ncpfs: tcp: Signature violation\n"); |
| 655 | __ncp_abort_request(server, req, -EIO); |
| 656 | return -EIO; |
| 657 | } |
| 658 | } |
| 659 | #endif |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 660 | ncp_finish_request(server, req, req->datalen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | nextreq:; |
| 662 | __ncp_next_request(server); |
| 663 | case 2: |
| 664 | next:; |
| 665 | server->rcv.ptr = (unsigned char*)&server->rcv.buf; |
| 666 | server->rcv.len = 10; |
| 667 | server->rcv.state = 0; |
| 668 | break; |
| 669 | case 3: |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 670 | ncp_finish_request(server, server->rcv.creq, -EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | goto nextreq; |
| 672 | case 5: |
| 673 | info_server(server, 0, server->unexpected_packet.data, server->unexpected_packet.len); |
| 674 | goto next; |
| 675 | } |
| 676 | } |
| 677 | } |
| 678 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 679 | void ncp_tcp_rcv_proc(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 681 | struct ncp_server *server = |
| 682 | container_of(work, struct ncp_server, rcv.tq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 684 | mutex_lock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | __ncptcp_rcv_proc(server); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 686 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | } |
| 688 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 689 | void ncp_tcp_tx_proc(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 691 | struct ncp_server *server = |
| 692 | container_of(work, struct ncp_server, tx.tq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 694 | mutex_lock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | __ncptcp_try_send(server); |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 696 | mutex_unlock(&server->rcv.creq_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | static int do_ncp_rpc_call(struct ncp_server *server, int size, |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 700 | unsigned char* reply_buf, int max_reply_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | { |
| 702 | int result; |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 703 | struct ncp_request_reply *req; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 705 | req = ncp_alloc_req(); |
| 706 | if (!req) |
| 707 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 709 | req->reply_buf = reply_buf; |
| 710 | req->datalen = max_reply_size; |
| 711 | req->tx_iov[1].iov_base = server->packet; |
| 712 | req->tx_iov[1].iov_len = size; |
| 713 | req->tx_iovlen = 1; |
| 714 | req->tx_totallen = size; |
| 715 | req->tx_type = *(u_int16_t*)server->packet; |
| 716 | |
| 717 | result = ncp_add_request(server, req); |
| 718 | if (result < 0) |
| 719 | goto out; |
| 720 | |
| 721 | if (wait_event_interruptible(req->wq, req->status == RQ_DONE)) { |
| 722 | ncp_abort_request(server, req, -EINTR); |
| 723 | result = -EINTR; |
| 724 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | } |
Pierre Ossman | c5f93cf | 2007-02-19 11:34:43 +0100 | [diff] [blame] | 726 | |
| 727 | result = req->result; |
| 728 | |
| 729 | out: |
| 730 | ncp_req_put(req); |
| 731 | |
| 732 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | /* |
| 736 | * We need the server to be locked here, so check! |
| 737 | */ |
| 738 | |
| 739 | static int ncp_do_request(struct ncp_server *server, int size, |
| 740 | void* reply, int max_reply_size) |
| 741 | { |
| 742 | int result; |
| 743 | |
| 744 | if (server->lock == 0) { |
| 745 | printk(KERN_ERR "ncpfs: Server not locked!\n"); |
| 746 | return -EIO; |
| 747 | } |
| 748 | if (!ncp_conn_valid(server)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | return -EIO; |
| 750 | } |
| 751 | { |
| 752 | sigset_t old_set; |
| 753 | unsigned long mask, flags; |
| 754 | |
| 755 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 756 | old_set = current->blocked; |
| 757 | if (current->flags & PF_EXITING) |
| 758 | mask = 0; |
| 759 | else |
| 760 | mask = sigmask(SIGKILL); |
| 761 | if (server->m.flags & NCP_MOUNT_INTR) { |
| 762 | /* FIXME: This doesn't seem right at all. So, like, |
| 763 | we can't handle SIGINT and get whatever to stop? |
| 764 | What if we've blocked it ourselves? What about |
| 765 | alarms? Why, in fact, are we mucking with the |
| 766 | sigmask at all? -- r~ */ |
| 767 | if (current->sighand->action[SIGINT - 1].sa.sa_handler == SIG_DFL) |
| 768 | mask |= sigmask(SIGINT); |
| 769 | if (current->sighand->action[SIGQUIT - 1].sa.sa_handler == SIG_DFL) |
| 770 | mask |= sigmask(SIGQUIT); |
| 771 | } |
| 772 | siginitsetinv(¤t->blocked, mask); |
| 773 | recalc_sigpending(); |
| 774 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
| 775 | |
| 776 | result = do_ncp_rpc_call(server, size, reply, max_reply_size); |
| 777 | |
| 778 | spin_lock_irqsave(¤t->sighand->siglock, flags); |
| 779 | current->blocked = old_set; |
| 780 | recalc_sigpending(); |
| 781 | spin_unlock_irqrestore(¤t->sighand->siglock, flags); |
| 782 | } |
| 783 | |
| 784 | DDPRINTK("do_ncp_rpc_call returned %d\n", result); |
| 785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | return result; |
| 787 | } |
| 788 | |
| 789 | /* ncp_do_request assures that at least a complete reply header is |
| 790 | * received. It assumes that server->current_size contains the ncp |
| 791 | * request size |
| 792 | */ |
| 793 | int ncp_request2(struct ncp_server *server, int function, |
| 794 | void* rpl, int size) |
| 795 | { |
| 796 | struct ncp_request_header *h; |
| 797 | struct ncp_reply_header* reply = rpl; |
| 798 | int result; |
| 799 | |
| 800 | h = (struct ncp_request_header *) (server->packet); |
| 801 | if (server->has_subfunction != 0) { |
| 802 | *(__u16 *) & (h->data[0]) = htons(server->current_size - sizeof(*h) - 2); |
| 803 | } |
| 804 | h->type = NCP_REQUEST; |
| 805 | /* |
| 806 | * The server shouldn't know or care what task is making a |
| 807 | * request, so we always use the same task number. |
| 808 | */ |
| 809 | h->task = 2; /* (current->pid) & 0xff; */ |
| 810 | h->function = function; |
| 811 | |
| 812 | result = ncp_do_request(server, server->current_size, reply, size); |
| 813 | if (result < 0) { |
| 814 | DPRINTK("ncp_request_error: %d\n", result); |
| 815 | goto out; |
| 816 | } |
| 817 | server->completion = reply->completion_code; |
| 818 | server->conn_status = reply->connection_state; |
| 819 | server->reply_size = result; |
| 820 | server->ncp_reply_size = result - sizeof(struct ncp_reply_header); |
| 821 | |
| 822 | result = reply->completion_code; |
| 823 | |
| 824 | if (result != 0) |
| 825 | PPRINTK("ncp_request: completion code=%x\n", result); |
| 826 | out: |
| 827 | return result; |
| 828 | } |
| 829 | |
| 830 | int ncp_connect(struct ncp_server *server) |
| 831 | { |
| 832 | struct ncp_request_header *h; |
| 833 | int result; |
| 834 | |
| 835 | server->connection = 0xFFFF; |
| 836 | server->sequence = 255; |
| 837 | |
| 838 | h = (struct ncp_request_header *) (server->packet); |
| 839 | h->type = NCP_ALLOC_SLOT_REQUEST; |
| 840 | h->task = 2; /* see above */ |
| 841 | h->function = 0; |
| 842 | |
| 843 | result = ncp_do_request(server, sizeof(*h), server->packet, server->packet_size); |
| 844 | if (result < 0) |
| 845 | goto out; |
| 846 | server->connection = h->conn_low + (h->conn_high * 256); |
| 847 | result = 0; |
| 848 | out: |
| 849 | return result; |
| 850 | } |
| 851 | |
| 852 | int ncp_disconnect(struct ncp_server *server) |
| 853 | { |
| 854 | struct ncp_request_header *h; |
| 855 | |
| 856 | h = (struct ncp_request_header *) (server->packet); |
| 857 | h->type = NCP_DEALLOC_SLOT_REQUEST; |
| 858 | h->task = 2; /* see above */ |
| 859 | h->function = 0; |
| 860 | |
| 861 | return ncp_do_request(server, sizeof(*h), server->packet, server->packet_size); |
| 862 | } |
| 863 | |
| 864 | void ncp_lock_server(struct ncp_server *server) |
| 865 | { |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 866 | mutex_lock(&server->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | if (server->lock) |
| 868 | printk(KERN_WARNING "ncp_lock_server: was locked!\n"); |
| 869 | server->lock = 1; |
| 870 | } |
| 871 | |
| 872 | void ncp_unlock_server(struct ncp_server *server) |
| 873 | { |
| 874 | if (!server->lock) { |
| 875 | printk(KERN_WARNING "ncp_unlock_server: was not locked!\n"); |
| 876 | return; |
| 877 | } |
| 878 | server->lock = 0; |
Ingo Molnar | 8e3f904 | 2006-03-23 03:00:43 -0800 | [diff] [blame] | 879 | mutex_unlock(&server->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | } |