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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 | /* * linux/fs/ncpfs/sock.c * * Copyright (C) 1992, 1993 Rick Sladkey * * Modified 1995, 1996 by Volker Lendecke to be usable for ncp * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache * */ #include <linux/config.h> #include <linux/time.h> #include <linux/errno.h> #include <linux/socket.h> #include <linux/fcntl.h> #include <linux/stat.h> #include <asm/uaccess.h> #include <linux/in.h> #include <linux/net.h> #include <linux/mm.h> #include <linux/netdevice.h> #include <linux/signal.h> #include <net/scm.h> #include <net/sock.h> #include <linux/ipx.h> #include <linux/poll.h> #include <linux/file.h> #include <linux/ncp_fs.h> #include "ncpsign_kernel.h" static int _recv(struct socket *sock, void *buf, int size, unsigned flags) { struct msghdr msg = {NULL, }; struct kvec iov = {buf, size}; return kernel_recvmsg(sock, &msg, &iov, 1, size, flags); } static inline int do_send(struct socket *sock, struct kvec *vec, int count, int len, unsigned flags) { struct msghdr msg = { .msg_flags = flags }; return kernel_sendmsg(sock, &msg, vec, count, len); } static int _send(struct socket *sock, const void *buff, int len) { struct kvec vec; vec.iov_base = (void *) buff; vec.iov_len = len; return do_send(sock, &vec, 1, len, 0); } struct ncp_request_reply { struct list_head req; wait_queue_head_t wq; struct ncp_reply_header* reply_buf; size_t datalen; int result; enum { RQ_DONE, RQ_INPROGRESS, RQ_QUEUED, RQ_IDLE } status; struct kvec* tx_ciov; size_t tx_totallen; size_t tx_iovlen; struct kvec tx_iov[3]; u_int16_t tx_type; u_int32_t sign[6]; }; void ncp_tcp_data_ready(struct sock *sk, int len) { struct ncp_server *server = sk->sk_user_data; server->data_ready(sk, len); schedule_work(&server->rcv.tq); } void ncp_tcp_error_report(struct sock *sk) { struct ncp_server *server = sk->sk_user_data; server->error_report(sk); schedule_work(&server->rcv.tq); } void ncp_tcp_write_space(struct sock *sk) { struct ncp_server *server = sk->sk_user_data; /* We do not need any locking: we first set tx.creq, and then we do sendmsg, not vice versa... */ server->write_space(sk); if (server->tx.creq) schedule_work(&server->tx.tq); } void ncpdgram_timeout_call(unsigned long v) { struct ncp_server *server = (void*)v; schedule_work(&server->timeout_tq); } static inline void ncp_finish_request(struct ncp_request_reply *req, int result) { req->result = result; req->status = RQ_DONE; wake_up_all(&req->wq); } static void __abort_ncp_connection(struct ncp_server *server, struct ncp_request_reply *aborted, int err) { struct ncp_request_reply *req; ncp_invalidate_conn(server); del_timer(&server->timeout_tm); while (!list_empty(&server->tx.requests)) { req = list_entry(server->tx.requests.next, struct ncp_request_reply, req); list_del_init(&req->req); if (req == aborted) { ncp_finish_request(req, err); } else { ncp_finish_request(req, -EIO); } } req = server->rcv.creq; if (req) { server->rcv.creq = NULL; if (req == aborted) { ncp_finish_request(req, err); } else { ncp_finish_request(req, -EIO); } server->rcv.ptr = NULL; server->rcv.state = 0; } req = server->tx.creq; if (req) { server->tx.creq = NULL; if (req == aborted) { ncp_finish_request(req, err); } else { ncp_finish_request(req, -EIO); } } } static inline int get_conn_number(struct ncp_reply_header *rp) { return rp->conn_low | (rp->conn_high << 8); } static inline void __ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err) { /* If req is done, we got signal, but we also received answer... */ switch (req->status) { case RQ_IDLE: case RQ_DONE: break; case RQ_QUEUED: list_del_init(&req->req); ncp_finish_request(req, err); break; case RQ_INPROGRESS: __abort_ncp_connection(server, req, err); break; } } static inline void ncp_abort_request(struct ncp_server *server, struct ncp_request_reply *req, int err) { down(&server->rcv.creq_sem); __ncp_abort_request(server, req, err); up(&server->rcv.creq_sem); } static inline void __ncptcp_abort(struct ncp_server *server) { __abort_ncp_connection(server, NULL, 0); } static int ncpdgram_send(struct socket *sock, struct ncp_request_reply *req) { struct kvec vec[3]; /* sock_sendmsg updates iov pointers for us :-( */ memcpy(vec, req->tx_ciov, req->tx_iovlen * sizeof(vec[0])); return do_send(sock, vec, req->tx_iovlen, req->tx_totallen, MSG_DONTWAIT); } static void __ncptcp_try_send(struct ncp_server *server) { struct ncp_request_reply *rq; struct kvec *iov; struct kvec iovc[3]; int result; rq = server->tx.creq; if (!rq) return; /* sock_sendmsg updates iov pointers for us :-( */ memcpy(iovc, rq->tx_ciov, rq->tx_iovlen * sizeof(iov[0])); result = do_send(server->ncp_sock, iovc, rq->tx_iovlen, rq->tx_totallen, MSG_NOSIGNAL | MSG_DONTWAIT); if (result == -EAGAIN) return; if (result < 0) { printk(KERN_ERR "ncpfs: tcp: Send failed: %d\n", result); __ncp_abort_request(server, rq, result); return; } if (result >= rq->tx_totallen) { server->rcv.creq = rq; server->tx.creq = NULL; return; } rq->tx_totallen -= result; iov = rq->tx_ciov; while (iov->iov_len <= result) { result -= iov->iov_len; iov++; rq->tx_iovlen--; } iov->iov_base += result; iov->iov_len -= result; rq->tx_ciov = iov; } static inline void ncp_init_header(struct ncp_server *server, struct ncp_request_reply *req, struct ncp_request_header *h) { req->status = RQ_INPROGRESS; h->conn_low = server->connection; h->conn_high = server->connection >> 8; h->sequence = ++server->sequence; } static void ncpdgram_start_request(struct ncp_server *server, struct ncp_request_reply *req) { size_t signlen; struct ncp_request_header* h; req->tx_ciov = req->tx_iov + 1; h = req->tx_iov[1].iov_base; ncp_init_header(server, req, h); signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1, req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1, cpu_to_le32(req->tx_totallen), req->sign); if (signlen) { req->tx_ciov[1].iov_base = req->sign; req->tx_ciov[1].iov_len = signlen; req->tx_iovlen += 1; req->tx_totallen += signlen; } server->rcv.creq = req; server->timeout_last = server->m.time_out; server->timeout_retries = server->m.retry_count; ncpdgram_send(server->ncp_sock, req); mod_timer(&server->timeout_tm, jiffies + server->m.time_out); } #define NCP_TCP_XMIT_MAGIC (0x446D6454) #define NCP_TCP_XMIT_VERSION (1) #define NCP_TCP_RCVD_MAGIC (0x744E6350) static void ncptcp_start_request(struct ncp_server *server, struct ncp_request_reply *req) { size_t signlen; struct ncp_request_header* h; req->tx_ciov = req->tx_iov; h = req->tx_iov[1].iov_base; ncp_init_header(server, req, h); signlen = sign_packet(server, req->tx_iov[1].iov_base + sizeof(struct ncp_request_header) - 1, req->tx_iov[1].iov_len - sizeof(struct ncp_request_header) + 1, cpu_to_be32(req->tx_totallen + 24), req->sign + 4) + 16; req->sign[0] = htonl(NCP_TCP_XMIT_MAGIC); req->sign[1] = htonl(req->tx_totallen + signlen); req->sign[2] = htonl(NCP_TCP_XMIT_VERSION); req->sign[3] = htonl(req->datalen + 8); req->tx_iov[0].iov_base = req->sign; req->tx_iov[0].iov_len = signlen; req->tx_iovlen += 1; req->tx_totallen += signlen; server->tx.creq = req; __ncptcp_try_send(server); } static inline void __ncp_start_request(struct ncp_server *server, struct ncp_request_reply *req) { if (server->ncp_sock->type == SOCK_STREAM) ncptcp_start_request(server, req); else ncpdgram_start_request(server, req); } static int ncp_add_request(struct ncp_server *server, struct ncp_request_reply *req) { down(&server->rcv.creq_sem); if (!ncp_conn_valid(server)) { up(&server->rcv.creq_sem); printk(KERN_ERR "ncpfs: tcp: Server died\n"); return -EIO; } if (server->tx.creq || server->rcv.creq) { req->status = RQ_QUEUED; list_add_tail(&req->req, &server->tx.requests); up(&server->rcv.creq_sem); return 0; } __ncp_start_request(server, req); up(&server->rcv.creq_sem); return 0; } static void __ncp_next_request(struct ncp_server *server) { struct ncp_request_reply *req; server->rcv.creq = NULL; if (list_empty(&server->tx.requests)) { return; } req = list_entry(server->tx.requests.next, struct ncp_request_reply, req); list_del_init(&req->req); __ncp_start_request(server, req); } static void info_server(struct ncp_server *server, unsigned int id, const void * data, size_t len) { if (server->info_sock) { struct kvec iov[2]; __be32 hdr[2]; hdr[0] = cpu_to_be32(len + 8); hdr[1] = cpu_to_be32(id); iov[0].iov_base = hdr; iov[0].iov_len = 8; iov[1].iov_base = (void *) data; iov[1].iov_len = len; do_send(server->info_sock, iov, 2, len + 8, MSG_NOSIGNAL); } } void ncpdgram_rcv_proc(void *s) { struct ncp_server *server = s; struct socket* sock; sock = server->ncp_sock; while (1) { struct ncp_reply_header reply; int result; result = _recv(sock, &reply, sizeof(reply), MSG_PEEK | MSG_DONTWAIT); if (result < 0) { break; } if (result >= sizeof(reply)) { struct ncp_request_reply *req; if (reply.type == NCP_WATCHDOG) { unsigned char buf[10]; if (server->connection != get_conn_number(&reply)) { goto drop; } result = _recv(sock, buf, sizeof(buf), MSG_DONTWAIT); if (result < 0) { DPRINTK("recv failed with %d\n", result); continue; } if (result < 10) { DPRINTK("too short (%u) watchdog packet\n", result); continue; } if (buf[9] != '?') { DPRINTK("bad signature (%02X) in watchdog packet\n", buf[9]); continue; } buf[9] = 'Y'; _send(sock, buf, sizeof(buf)); continue; } if (reply.type != NCP_POSITIVE_ACK && reply.type != NCP_REPLY) { result = _recv(sock, server->unexpected_packet.data, sizeof(server->unexpected_packet.data), MSG_DONTWAIT); if (result < 0) { continue; } info_server(server, 0, server->unexpected_packet.data, result); continue; } down(&server->rcv.creq_sem); req = server->rcv.creq; if (req && (req->tx_type == NCP_ALLOC_SLOT_REQUEST || (server->sequence == reply.sequence && server->connection == get_conn_number(&reply)))) { if (reply.type == NCP_POSITIVE_ACK) { server->timeout_retries = server->m.retry_count; server->timeout_last = NCP_MAX_RPC_TIMEOUT; mod_timer(&server->timeout_tm, jiffies + NCP_MAX_RPC_TIMEOUT); } else if (reply.type == NCP_REPLY) { result = _recv(sock, (void*)req->reply_buf, req->datalen, MSG_DONTWAIT); #ifdef CONFIG_NCPFS_PACKET_SIGNING if (result >= 0 && server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) { if (result < 8 + 8) { result = -EIO; } else { unsigned int hdrl; result -= 8; hdrl = sock->sk->sk_family == AF_INET ? 8 : 6; if (sign_verify_reply(server, ((char*)req->reply_buf) + hdrl, result - hdrl, cpu_to_le32(result), ((char*)req->reply_buf) + result)) { printk(KERN_INFO "ncpfs: Signature violation\n"); result = -EIO; } } } #endif del_timer(&server->timeout_tm); server->rcv.creq = NULL; ncp_finish_request(req, result); __ncp_next_request(server); up(&server->rcv.creq_sem); continue; } } up(&server->rcv.creq_sem); } drop:; _recv(sock, &reply, sizeof(reply), MSG_DONTWAIT); } } static void __ncpdgram_timeout_proc(struct ncp_server *server) { /* If timer is pending, we are processing another request... */ if (!timer_pending(&server->timeout_tm)) { struct ncp_request_reply* req; req = server->rcv.creq; if (req) { int timeout; if (server->m.flags & NCP_MOUNT_SOFT) { if (server->timeout_retries-- == 0) { __ncp_abort_request(server, req, -ETIMEDOUT); return; } } /* Ignore errors */ ncpdgram_send(server->ncp_sock, req); timeout = server->timeout_last << 1; if (timeout > NCP_MAX_RPC_TIMEOUT) { timeout = NCP_MAX_RPC_TIMEOUT; } server->timeout_last = timeout; mod_timer(&server->timeout_tm, jiffies + timeout); } } } void ncpdgram_timeout_proc(void *s) { struct ncp_server *server = s; down(&server->rcv.creq_sem); __ncpdgram_timeout_proc(server); up(&server->rcv.creq_sem); } static inline void ncp_init_req(struct ncp_request_reply* req) { init_waitqueue_head(&req->wq); req->status = RQ_IDLE; } static int do_tcp_rcv(struct ncp_server *server, void *buffer, size_t len) { int result; if (buffer) { result = _recv(server->ncp_sock, buffer, len, MSG_DONTWAIT); } else { static unsigned char dummy[1024]; if (len > sizeof(dummy)) { len = sizeof(dummy); } result = _recv(server->ncp_sock, dummy, len, MSG_DONTWAIT); } if (result < 0) { return result; } if (result > len) { printk(KERN_ERR "ncpfs: tcp: bug in recvmsg (%u > %Zu)\n", result, len); return -EIO; } return result; } static int __ncptcp_rcv_proc(struct ncp_server *server) { /* We have to check the result, so store the complete header */ while (1) { int result; struct ncp_request_reply *req; int datalen; int type; while (server->rcv.len) { result = do_tcp_rcv(server, server->rcv.ptr, server->rcv.len); if (result == -EAGAIN) { return 0; } if (result <= 0) { req = server->rcv.creq; if (req) { __ncp_abort_request(server, req, -EIO); } else { __ncptcp_abort(server); } if (result < 0) { printk(KERN_ERR "ncpfs: tcp: error in recvmsg: %d\n", result); } else { DPRINTK(KERN_ERR "ncpfs: tcp: EOF\n"); } return -EIO; } if (server->rcv.ptr) { server->rcv.ptr += result; } server->rcv.len -= result; } switch (server->rcv.state) { case 0: if (server->rcv.buf.magic != htonl(NCP_TCP_RCVD_MAGIC)) { printk(KERN_ERR "ncpfs: tcp: Unexpected reply type %08X\n", ntohl(server->rcv.buf.magic)); __ncptcp_abort(server); return -EIO; } datalen = ntohl(server->rcv.buf.len) & 0x0FFFFFFF; if (datalen < 10) { printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen); __ncptcp_abort(server); return -EIO; } #ifdef CONFIG_NCPFS_PACKET_SIGNING if (server->sign_active) { if (datalen < 18) { printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d\n", datalen); __ncptcp_abort(server); return -EIO; } server->rcv.buf.len = datalen - 8; server->rcv.ptr = (unsigned char*)&server->rcv.buf.p1; server->rcv.len = 8; server->rcv.state = 4; break; } #endif type = ntohs(server->rcv.buf.type); #ifdef CONFIG_NCPFS_PACKET_SIGNING cont:; #endif if (type != NCP_REPLY) { if (datalen - 8 <= sizeof(server->unexpected_packet.data)) { *(__u16*)(server->unexpected_packet.data) = htons(type); server->unexpected_packet.len = datalen - 8; server->rcv.state = 5; server->rcv.ptr = server->unexpected_packet.data + 2; server->rcv.len = datalen - 10; break; } DPRINTK("ncpfs: tcp: Unexpected NCP type %02X\n", type); skipdata2:; server->rcv.state = 2; skipdata:; server->rcv.ptr = NULL; server->rcv.len = datalen - 10; break; } req = server->rcv.creq; if (!req) { DPRINTK(KERN_ERR "ncpfs: Reply without appropriate request\n"); goto skipdata2; } if (datalen > req->datalen + 8) { printk(KERN_ERR "ncpfs: tcp: Unexpected reply len %d (expected at most %Zd)\n", datalen, req->datalen + 8); server->rcv.state = 3; goto skipdata; } req->datalen = datalen - 8; req->reply_buf->type = NCP_REPLY; server->rcv.ptr = (unsigned char*)(req->reply_buf) + 2; server->rcv.len = datalen - 10; server->rcv.state = 1; break; #ifdef CONFIG_NCPFS_PACKET_SIGNING case 4: datalen = server->rcv.buf.len; type = ntohs(server->rcv.buf.type2); goto cont; #endif case 1: req = server->rcv.creq; if (req->tx_type != NCP_ALLOC_SLOT_REQUEST) { if (req->reply_buf->sequence != server->sequence) { printk(KERN_ERR "ncpfs: tcp: Bad sequence number\n"); __ncp_abort_request(server, req, -EIO); return -EIO; } if ((req->reply_buf->conn_low | (req->reply_buf->conn_high << 8)) != server->connection) { printk(KERN_ERR "ncpfs: tcp: Connection number mismatch\n"); __ncp_abort_request(server, req, -EIO); return -EIO; } } #ifdef CONFIG_NCPFS_PACKET_SIGNING if (server->sign_active && req->tx_type != NCP_DEALLOC_SLOT_REQUEST) { if (sign_verify_reply(server, (unsigned char*)(req->reply_buf) + 6, req->datalen - 6, cpu_to_be32(req->datalen + 16), &server->rcv.buf.type)) { printk(KERN_ERR "ncpfs: tcp: Signature violation\n"); __ncp_abort_request(server, req, -EIO); return -EIO; } } #endif ncp_finish_request(req, req->datalen); nextreq:; __ncp_next_request(server); case 2: next:; server->rcv.ptr = (unsigned char*)&server->rcv.buf; server->rcv.len = 10; server->rcv.state = 0; break; case 3: ncp_finish_request(server->rcv.creq, -EIO); goto nextreq; case 5: info_server(server, 0, server->unexpected_packet.data, server->unexpected_packet.len); goto next; } } } void ncp_tcp_rcv_proc(void *s) { struct ncp_server *server = s; down(&server->rcv.creq_sem); __ncptcp_rcv_proc(server); up(&server->rcv.creq_sem); } void ncp_tcp_tx_proc(void *s) { struct ncp_server *server = s; down(&server->rcv.creq_sem); __ncptcp_try_send(server); up(&server->rcv.creq_sem); } static int do_ncp_rpc_call(struct ncp_server *server, int size, struct ncp_reply_header* reply_buf, int max_reply_size) { int result; struct ncp_request_reply req; ncp_init_req(&req); req.reply_buf = reply_buf; req.datalen = max_reply_size; req.tx_iov[1].iov_base = server->packet; req.tx_iov[1].iov_len = size; req.tx_iovlen = 1; req.tx_totallen = size; req.tx_type = *(u_int16_t*)server->packet; result = ncp_add_request(server, &req); if (result < 0) { return result; } if (wait_event_interruptible(req.wq, req.status == RQ_DONE)) { ncp_abort_request(server, &req, -EIO); } return req.result; } /* * We need the server to be locked here, so check! */ static int ncp_do_request(struct ncp_server *server, int size, void* reply, int max_reply_size) { int result; if (server->lock == 0) { printk(KERN_ERR "ncpfs: Server not locked!\n"); return -EIO; } if (!ncp_conn_valid(server)) { printk(KERN_ERR "ncpfs: Connection invalid!\n"); return -EIO; } { sigset_t old_set; unsigned long mask, flags; spin_lock_irqsave(¤t->sighand->siglock, flags); old_set = current->blocked; if (current->flags & PF_EXITING) mask = 0; else mask = sigmask(SIGKILL); if (server->m.flags & NCP_MOUNT_INTR) { /* FIXME: This doesn't seem right at all. So, like, we can't handle SIGINT and get whatever to stop? What if we've blocked it ourselves? What about alarms? Why, in fact, are we mucking with the sigmask at all? -- r~ */ if (current->sighand->action[SIGINT - 1].sa.sa_handler == SIG_DFL) mask |= sigmask(SIGINT); if (current->sighand->action[SIGQUIT - 1].sa.sa_handler == SIG_DFL) mask |= sigmask(SIGQUIT); } siginitsetinv(¤t->blocked, mask); recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, flags); result = do_ncp_rpc_call(server, size, reply, max_reply_size); spin_lock_irqsave(¤t->sighand->siglock, flags); current->blocked = old_set; recalc_sigpending(); spin_unlock_irqrestore(¤t->sighand->siglock, flags); } DDPRINTK("do_ncp_rpc_call returned %d\n", result); if (result < 0) { /* There was a problem with I/O, so the connections is * no longer usable. */ ncp_invalidate_conn(server); } return result; } /* ncp_do_request assures that at least a complete reply header is * received. It assumes that server->current_size contains the ncp * request size */ int ncp_request2(struct ncp_server *server, int function, void* rpl, int size) { struct ncp_request_header *h; struct ncp_reply_header* reply = rpl; int result; h = (struct ncp_request_header *) (server->packet); if (server->has_subfunction != 0) { *(__u16 *) & (h->data[0]) = htons(server->current_size - sizeof(*h) - 2); } h->type = NCP_REQUEST; /* * The server shouldn't know or care what task is making a * request, so we always use the same task number. */ h->task = 2; /* (current->pid) & 0xff; */ h->function = function; result = ncp_do_request(server, server->current_size, reply, size); if (result < 0) { DPRINTK("ncp_request_error: %d\n", result); goto out; } server->completion = reply->completion_code; server->conn_status = reply->connection_state; server->reply_size = result; server->ncp_reply_size = result - sizeof(struct ncp_reply_header); result = reply->completion_code; if (result != 0) PPRINTK("ncp_request: completion code=%x\n", result); out: return result; } int ncp_connect(struct ncp_server *server) { struct ncp_request_header *h; int result; server->connection = 0xFFFF; server->sequence = 255; h = (struct ncp_request_header *) (server->packet); h->type = NCP_ALLOC_SLOT_REQUEST; h->task = 2; /* see above */ h->function = 0; result = ncp_do_request(server, sizeof(*h), server->packet, server->packet_size); if (result < 0) goto out; server->connection = h->conn_low + (h->conn_high * 256); result = 0; out: return result; } int ncp_disconnect(struct ncp_server *server) { struct ncp_request_header *h; h = (struct ncp_request_header *) (server->packet); h->type = NCP_DEALLOC_SLOT_REQUEST; h->task = 2; /* see above */ h->function = 0; return ncp_do_request(server, sizeof(*h), server->packet, server->packet_size); } void ncp_lock_server(struct ncp_server *server) { down(&server->sem); if (server->lock) printk(KERN_WARNING "ncp_lock_server: was locked!\n"); server->lock = 1; } void ncp_unlock_server(struct ncp_server *server) { if (!server->lock) { printk(KERN_WARNING "ncp_unlock_server: was not locked!\n"); return; } server->lock = 0; up(&server->sem); } |