1 /* 2 * Copyright 2006-2009, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Axel Dörfler, axeld@pinc-software.de 7 * Andrew Galante, haiku.galante@gmail.com 8 * Hugo Santos, hugosantos@gmail.com 9 */ 10 11 12 #include "EndpointManager.h" 13 #include "TCPEndpoint.h" 14 15 #include <net_protocol.h> 16 #include <net_stat.h> 17 18 #include <KernelExport.h> 19 #include <util/list.h> 20 21 #include <netinet/in.h> 22 #include <netinet/ip.h> 23 #include <new> 24 #include <stdlib.h> 25 #include <string.h> 26 27 #include <lock.h> 28 #include <util/AutoLock.h> 29 30 #include <NetBufferUtilities.h> 31 #include <NetUtilities.h> 32 33 34 //#define TRACE_TCP 35 #ifdef TRACE_TCP 36 # define TRACE(x) dprintf x 37 # define TRACE_BLOCK(x) dump_block x 38 #else 39 # define TRACE(x) 40 # define TRACE_BLOCK(x) 41 #endif 42 43 44 typedef NetBufferField<uint16, offsetof(tcp_header, checksum)> TCPChecksumField; 45 46 47 net_buffer_module_info *gBufferModule; 48 net_datalink_module_info *gDatalinkModule; 49 net_socket_module_info *gSocketModule; 50 net_stack_module_info *gStackModule; 51 52 53 static EndpointManager* sEndpointManagers[AF_MAX]; 54 static rw_lock sEndpointManagersLock; 55 56 57 // The TCP header length is at most 64 bytes. 58 static const int kMaxOptionSize = 64 - sizeof(tcp_header); 59 60 61 /*! Returns an endpoint manager for the specified domain, if any. 62 You need to hold the sEndpointManagersLock when calling this function. 63 */ 64 static inline EndpointManager* 65 endpoint_manager_for_locked(int family) 66 { 67 if (family >= AF_MAX || family < 0) 68 return NULL; 69 70 return sEndpointManagers[family]; 71 } 72 73 74 /*! Returns an endpoint manager for the specified domain, if any */ 75 static inline EndpointManager* 76 endpoint_manager_for(net_domain* domain) 77 { 78 ReadLocker _(sEndpointManagersLock); 79 80 return endpoint_manager_for_locked(domain->family); 81 } 82 83 84 static inline void 85 bump_option(tcp_option *&option, size_t &length) 86 { 87 if (option->kind <= TCP_OPTION_NOP) { 88 length++; 89 option = (tcp_option *)((uint8 *)option + 1); 90 } else { 91 length += option->length; 92 option = (tcp_option *)((uint8 *)option + option->length); 93 } 94 } 95 96 97 static inline size_t 98 add_options(tcp_segment_header &segment, uint8 *buffer, size_t bufferSize) 99 { 100 tcp_option *option = (tcp_option *)buffer; 101 size_t length = 0; 102 103 if (segment.max_segment_size > 0 && length + 8 <= bufferSize) { 104 option->kind = TCP_OPTION_MAX_SEGMENT_SIZE; 105 option->length = 4; 106 option->max_segment_size = htons(segment.max_segment_size); 107 bump_option(option, length); 108 } 109 110 if ((segment.options & TCP_HAS_TIMESTAMPS) 111 && length + 12 <= bufferSize) { 112 // two NOPs so the timestamps get aligned to a 4 byte boundary 113 option->kind = TCP_OPTION_NOP; 114 bump_option(option, length); 115 option->kind = TCP_OPTION_NOP; 116 bump_option(option, length); 117 option->kind = TCP_OPTION_TIMESTAMP; 118 option->length = 10; 119 option->timestamp.value = htonl(segment.timestamp_value); 120 // TSecr is opaque to us, we send it as we received it. 121 option->timestamp.reply = segment.timestamp_reply; 122 bump_option(option, length); 123 } 124 125 if ((segment.options & TCP_HAS_WINDOW_SCALE) 126 && length + 4 <= bufferSize) { 127 // insert one NOP so that the subsequent data is aligned on a 4 byte boundary 128 option->kind = TCP_OPTION_NOP; 129 bump_option(option, length); 130 131 option->kind = TCP_OPTION_WINDOW_SHIFT; 132 option->length = 3; 133 option->window_shift = segment.window_shift; 134 bump_option(option, length); 135 } 136 137 if ((segment.options & TCP_SACK_PERMITTED) 138 && length + 2 <= bufferSize) { 139 option->kind = TCP_OPTION_SACK_PERMITTED; 140 option->length = 2; 141 bump_option(option, length); 142 } 143 144 if (segment.sack_count > 0) { 145 int sackCount = ((int)(bufferSize - length) - 4) / sizeof(tcp_sack); 146 if (sackCount > segment.sack_count) 147 sackCount = segment.sack_count; 148 149 if (sackCount > 0) { 150 option->kind = TCP_OPTION_NOP; 151 bump_option(option, length); 152 option->kind = TCP_OPTION_NOP; 153 bump_option(option, length); 154 option->kind = TCP_OPTION_SACK; 155 option->length = 2 + sackCount * sizeof(tcp_sack); 156 memcpy(option->sack, segment.sacks, sackCount * sizeof(tcp_sack)); 157 bump_option(option, length); 158 } 159 } 160 161 if ((length & 3) == 0) { 162 // options completely fill out the option space 163 return length; 164 } 165 166 option->kind = TCP_OPTION_END; 167 return (length + 3) & ~3; 168 // bump to a multiple of 4 length 169 } 170 171 172 static void 173 process_options(tcp_segment_header &segment, net_buffer *buffer, size_t size) 174 { 175 if (size == 0) 176 return; 177 178 tcp_option *option; 179 180 uint8 optionsBuffer[kMaxOptionSize]; 181 if (gBufferModule->direct_access(buffer, sizeof(tcp_header), size, 182 (void **)&option) != B_OK) { 183 if (size > sizeof(optionsBuffer)) { 184 dprintf("Ignoring TCP options larger than expected.\n"); 185 return; 186 } 187 188 gBufferModule->read(buffer, sizeof(tcp_header), optionsBuffer, size); 189 option = (tcp_option *)optionsBuffer; 190 } 191 192 while (size > 0) { 193 int32 length = -1; 194 195 switch (option->kind) { 196 case TCP_OPTION_END: 197 case TCP_OPTION_NOP: 198 length = 1; 199 break; 200 case TCP_OPTION_MAX_SEGMENT_SIZE: 201 if (option->length == 4 && (size - 4) >= 0) 202 segment.max_segment_size = ntohs(option->max_segment_size); 203 break; 204 case TCP_OPTION_WINDOW_SHIFT: 205 if (option->length == 3 && (size - 3) >= 0) { 206 segment.options |= TCP_HAS_WINDOW_SCALE; 207 segment.window_shift = option->window_shift; 208 } 209 break; 210 case TCP_OPTION_TIMESTAMP: 211 if (option->length == 10 && (size - 10) >= 0) { 212 segment.options |= TCP_HAS_TIMESTAMPS; 213 segment.timestamp_value = option->timestamp.value; 214 segment.timestamp_reply = 215 ntohl(option->timestamp.reply); 216 } 217 break; 218 case TCP_OPTION_SACK_PERMITTED: 219 if (option->length == 2 && (size - 2) >= 0) 220 segment.options |= TCP_SACK_PERMITTED; 221 } 222 223 if (length < 0) { 224 length = option->length; 225 if (length == 0) 226 break; 227 } 228 229 size -= length; 230 option = (tcp_option *)((uint8 *)option + length); 231 } 232 } 233 234 235 #if 0 236 static void 237 dump_tcp_header(tcp_header &header) 238 { 239 dprintf(" source port: %u\n", ntohs(header.source_port)); 240 dprintf(" dest port: %u\n", ntohs(header.destination_port)); 241 dprintf(" sequence: %lu\n", header.Sequence()); 242 dprintf(" ack: %lu\n", header.Acknowledge()); 243 dprintf(" flags: %s%s%s%s%s%s\n", (header.flags & TCP_FLAG_FINISH) ? "FIN " : "", 244 (header.flags & TCP_FLAG_SYNCHRONIZE) ? "SYN " : "", 245 (header.flags & TCP_FLAG_RESET) ? "RST " : "", 246 (header.flags & TCP_FLAG_PUSH) ? "PUSH " : "", 247 (header.flags & TCP_FLAG_ACKNOWLEDGE) ? "ACK " : "", 248 (header.flags & TCP_FLAG_URGENT) ? "URG " : ""); 249 dprintf(" window: %u\n", header.AdvertisedWindow()); 250 dprintf(" urgent offset: %u\n", header.UrgentOffset()); 251 } 252 #endif 253 254 255 static int 256 dump_endpoints(int argc, char** argv) 257 { 258 for (int i = 0; i < AF_MAX; i++) { 259 EndpointManager* manager = sEndpointManagers[i]; 260 if (manager != NULL) 261 manager->Dump(); 262 } 263 264 return 0; 265 } 266 267 268 static int 269 dump_endpoint(int argc, char** argv) 270 { 271 if (argc < 2) { 272 kprintf("usage: tcp_endpoint [address]\n"); 273 return 0; 274 } 275 276 TCPEndpoint* endpoint = (TCPEndpoint*)parse_expression(argv[1]); 277 endpoint->Dump(); 278 279 return 0; 280 } 281 282 283 // #pragma mark - internal API 284 285 286 /*! Creates a new endpoint manager for the specified domain, or returns 287 an existing one for this domain. 288 */ 289 EndpointManager* 290 get_endpoint_manager(net_domain* domain) 291 { 292 // See if there is one already 293 EndpointManager* endpointManager = endpoint_manager_for(domain); 294 if (endpointManager != NULL) 295 return endpointManager; 296 297 WriteLocker _(sEndpointManagersLock); 298 299 endpointManager = endpoint_manager_for_locked(domain->family); 300 if (endpointManager != NULL) 301 return endpointManager; 302 303 // There is no endpoint manager for this domain yet, so we need 304 // to create one. 305 306 endpointManager = new(std::nothrow) EndpointManager(domain); 307 if (endpointManager == NULL) 308 return NULL; 309 310 if (endpointManager->Init() != B_OK) { 311 delete endpointManager; 312 return NULL; 313 } 314 315 sEndpointManagers[domain->family] = endpointManager; 316 return endpointManager; 317 } 318 319 320 void 321 put_endpoint_manager(EndpointManager* endpointManager) 322 { 323 // TODO: we may want to use reference counting instead of only discarding 324 // them on unload. But since there is likely only IPv4/v6 there is not much 325 // point to it. 326 } 327 328 329 const char* 330 name_for_state(tcp_state state) 331 { 332 switch (state) { 333 case CLOSED: 334 return "closed"; 335 case LISTEN: 336 return "listen"; 337 case SYNCHRONIZE_SENT: 338 return "syn-sent"; 339 case SYNCHRONIZE_RECEIVED: 340 return "syn-received"; 341 case ESTABLISHED: 342 return "established"; 343 344 // peer closes the connection 345 case FINISH_RECEIVED: 346 return "close-wait"; 347 case WAIT_FOR_FINISH_ACKNOWLEDGE: 348 return "last-ack"; 349 350 // we close the connection 351 case FINISH_SENT: 352 return "fin-wait1"; 353 case FINISH_ACKNOWLEDGED: 354 return "fin-wait2"; 355 case CLOSING: 356 return "closing"; 357 358 case TIME_WAIT: 359 return "time-wait"; 360 } 361 362 return "-"; 363 } 364 365 366 /*! Constructs a TCP header on \a buffer with the specified values 367 for \a flags, \a seq \a ack and \a advertisedWindow. 368 */ 369 status_t 370 add_tcp_header(net_address_module_info* addressModule, 371 tcp_segment_header& segment, net_buffer* buffer) 372 { 373 buffer->protocol = IPPROTO_TCP; 374 375 uint8 optionsBuffer[kMaxOptionSize]; 376 uint32 optionsLength = add_options(segment, optionsBuffer, 377 sizeof(optionsBuffer)); 378 379 NetBufferPrepend<tcp_header> bufferHeader(buffer, 380 sizeof(tcp_header) + optionsLength); 381 if (bufferHeader.Status() != B_OK) 382 return bufferHeader.Status(); 383 384 tcp_header& header = bufferHeader.Data(); 385 386 header.source_port = addressModule->get_port(buffer->source); 387 header.destination_port = addressModule->get_port(buffer->destination); 388 header.sequence = htonl(segment.sequence); 389 header.acknowledge = (segment.flags & TCP_FLAG_ACKNOWLEDGE) 390 ? htonl(segment.acknowledge) : 0; 391 header.reserved = 0; 392 header.header_length = (sizeof(tcp_header) + optionsLength) >> 2; 393 header.flags = segment.flags; 394 header.advertised_window = htons(segment.advertised_window); 395 header.checksum = 0; 396 header.urgent_offset = htons(segment.urgent_offset); 397 398 // we must detach before calculating the checksum as we may 399 // not have a contiguous buffer. 400 bufferHeader.Sync(); 401 402 if (optionsLength > 0) { 403 gBufferModule->write(buffer, sizeof(tcp_header), optionsBuffer, 404 optionsLength); 405 } 406 407 TRACE(("add_tcp_header(): buffer %p, flags 0x%x, seq %lu, ack %lu, up %u, " 408 "win %u\n", buffer, segment.flags, segment.sequence, 409 segment.acknowledge, segment.urgent_offset, segment.advertised_window)); 410 411 *TCPChecksumField(buffer) = Checksum::PseudoHeader(addressModule, 412 gBufferModule, buffer, IPPROTO_TCP); 413 414 return B_OK; 415 } 416 417 418 size_t 419 tcp_options_length(tcp_segment_header& segment) 420 { 421 size_t length = 0; 422 423 if (segment.max_segment_size > 0) 424 length += 4; 425 426 if (segment.options & TCP_HAS_TIMESTAMPS) 427 length += 12; 428 429 if (segment.options & TCP_HAS_WINDOW_SCALE) 430 length += 4; 431 432 if (segment.options & TCP_SACK_PERMITTED) 433 length += 2; 434 435 if (segment.sack_count > 0) { 436 int sackCount = min_c((int)((kMaxOptionSize - length - 4) 437 / sizeof(tcp_sack)), segment.sack_count); 438 if (sackCount > 0) 439 length += 4 + sackCount * sizeof(tcp_sack); 440 } 441 442 if ((length & 3) == 0) 443 return length; 444 445 return (length + 3) & ~3; 446 } 447 448 449 // #pragma mark - protocol API 450 451 452 net_protocol* 453 tcp_init_protocol(net_socket* socket) 454 { 455 socket->send.buffer_size = 32768; 456 // override net_socket default 457 458 TCPEndpoint* protocol = new (std::nothrow) TCPEndpoint(socket); 459 if (protocol == NULL) 460 return NULL; 461 462 if (protocol->InitCheck() != B_OK) { 463 delete protocol; 464 return NULL; 465 } 466 467 TRACE(("Creating new TCPEndpoint: %p\n", protocol)); 468 socket->protocol = IPPROTO_TCP; 469 return protocol; 470 } 471 472 473 status_t 474 tcp_uninit_protocol(net_protocol* protocol) 475 { 476 TRACE(("Deleting TCPEndpoint: %p\n", protocol)); 477 delete (TCPEndpoint*)protocol; 478 return B_OK; 479 } 480 481 482 status_t 483 tcp_open(net_protocol* protocol) 484 { 485 return ((TCPEndpoint*)protocol)->Open(); 486 } 487 488 489 status_t 490 tcp_close(net_protocol* protocol) 491 { 492 return ((TCPEndpoint*)protocol)->Close(); 493 } 494 495 496 status_t 497 tcp_free(net_protocol* protocol) 498 { 499 ((TCPEndpoint*)protocol)->Free(); 500 return B_OK; 501 } 502 503 504 status_t 505 tcp_connect(net_protocol* protocol, const struct sockaddr* address) 506 { 507 return ((TCPEndpoint*)protocol)->Connect(address); 508 } 509 510 511 status_t 512 tcp_accept(net_protocol* protocol, struct net_socket** _acceptedSocket) 513 { 514 return ((TCPEndpoint*)protocol)->Accept(_acceptedSocket); 515 } 516 517 518 status_t 519 tcp_control(net_protocol* _protocol, int level, int option, void* value, 520 size_t* _length) 521 { 522 TCPEndpoint* protocol = (TCPEndpoint*)_protocol; 523 524 if ((level & LEVEL_MASK) == IPPROTO_TCP) { 525 if (option == NET_STAT_SOCKET) 526 return protocol->FillStat((net_stat*)value); 527 } 528 529 return protocol->next->module->control(protocol->next, level, option, 530 value, _length); 531 } 532 533 534 status_t 535 tcp_getsockopt(net_protocol* _protocol, int level, int option, void* value, 536 int* _length) 537 { 538 TCPEndpoint* protocol = (TCPEndpoint*)_protocol; 539 540 if (level == IPPROTO_TCP) 541 return protocol->GetOption(option, value, _length); 542 543 return protocol->next->module->getsockopt(protocol->next, level, option, 544 value, _length); 545 } 546 547 548 status_t 549 tcp_setsockopt(net_protocol* _protocol, int level, int option, 550 const void* _value, int length) 551 { 552 TCPEndpoint* protocol = (TCPEndpoint*)_protocol; 553 554 if (level == SOL_SOCKET) { 555 if (option == SO_SNDBUF || option == SO_RCVBUF) { 556 if (length != sizeof(int)) 557 return B_BAD_VALUE; 558 559 status_t status; 560 const int* value = (const int*)_value; 561 562 if (option == SO_SNDBUF) 563 status = protocol->SetSendBufferSize(*value); 564 else 565 status = protocol->SetReceiveBufferSize(*value); 566 567 if (status < B_OK) 568 return status; 569 } 570 } else if (level == IPPROTO_TCP) 571 return protocol->SetOption(option, _value, length); 572 573 return protocol->next->module->setsockopt(protocol->next, level, option, 574 _value, length); 575 } 576 577 578 status_t 579 tcp_bind(net_protocol* protocol, const struct sockaddr* address) 580 { 581 return ((TCPEndpoint*)protocol)->Bind(address); 582 } 583 584 585 status_t 586 tcp_unbind(net_protocol* protocol, struct sockaddr* address) 587 { 588 return ((TCPEndpoint*)protocol)->Unbind(address); 589 } 590 591 592 status_t 593 tcp_listen(net_protocol* protocol, int count) 594 { 595 return ((TCPEndpoint*)protocol)->Listen(count); 596 } 597 598 599 status_t 600 tcp_shutdown(net_protocol* protocol, int direction) 601 { 602 return ((TCPEndpoint*)protocol)->Shutdown(direction); 603 } 604 605 606 status_t 607 tcp_send_data(net_protocol* protocol, net_buffer* buffer) 608 { 609 return ((TCPEndpoint*)protocol)->SendData(buffer); 610 } 611 612 613 status_t 614 tcp_send_routed_data(net_protocol* protocol, struct net_route* route, 615 net_buffer* buffer) 616 { 617 // TCP never sends routed data 618 return B_ERROR; 619 } 620 621 622 ssize_t 623 tcp_send_avail(net_protocol* protocol) 624 { 625 return ((TCPEndpoint*)protocol)->SendAvailable(); 626 } 627 628 629 status_t 630 tcp_read_data(net_protocol* protocol, size_t numBytes, uint32 flags, 631 net_buffer** _buffer) 632 { 633 return ((TCPEndpoint*)protocol)->ReadData(numBytes, flags, _buffer); 634 } 635 636 637 ssize_t 638 tcp_read_avail(net_protocol* protocol) 639 { 640 return ((TCPEndpoint*)protocol)->ReadAvailable(); 641 } 642 643 644 struct net_domain* 645 tcp_get_domain(net_protocol* protocol) 646 { 647 return protocol->next->module->get_domain(protocol->next); 648 } 649 650 651 size_t 652 tcp_get_mtu(net_protocol* protocol, const struct sockaddr* address) 653 { 654 return protocol->next->module->get_mtu(protocol->next, address); 655 } 656 657 658 status_t 659 tcp_receive_data(net_buffer* buffer) 660 { 661 TRACE(("TCP: Received buffer %p\n", buffer)); 662 663 if (buffer->interface == NULL || buffer->interface->domain == NULL) 664 return B_ERROR; 665 666 net_domain* domain = buffer->interface->domain; 667 net_address_module_info* addressModule = domain->address_module; 668 669 NetBufferHeaderReader<tcp_header> bufferHeader(buffer); 670 if (bufferHeader.Status() < B_OK) 671 return bufferHeader.Status(); 672 673 tcp_header& header = bufferHeader.Data(); 674 675 uint16 headerLength = header.HeaderLength(); 676 if (headerLength < sizeof(tcp_header)) 677 return B_BAD_DATA; 678 679 if (Checksum::PseudoHeader(addressModule, gBufferModule, buffer, 680 IPPROTO_TCP) != 0) 681 return B_BAD_DATA; 682 683 addressModule->set_port(buffer->source, header.source_port); 684 addressModule->set_port(buffer->destination, header.destination_port); 685 686 TRACE((" Looking for: peer %s, local %s\n", 687 AddressString(domain, buffer->source, true).Data(), 688 AddressString(domain, buffer->destination, true).Data())); 689 //dump_tcp_header(header); 690 //gBufferModule->dump(buffer); 691 692 tcp_segment_header segment(header.flags); 693 segment.sequence = header.Sequence(); 694 segment.acknowledge = header.Acknowledge(); 695 segment.advertised_window = header.AdvertisedWindow(); 696 segment.urgent_offset = header.UrgentOffset(); 697 process_options(segment, buffer, headerLength - sizeof(tcp_header)); 698 699 bufferHeader.Remove(headerLength); 700 // we no longer need to keep the header around 701 702 EndpointManager* endpointManager = endpoint_manager_for(domain); 703 if (endpointManager == NULL) { 704 TRACE((" No endpoint manager!\n")); 705 return B_ERROR; 706 } 707 708 int32 segmentAction = DROP; 709 710 TCPEndpoint* endpoint = endpointManager->FindConnection( 711 buffer->destination, buffer->source); 712 if (endpoint != NULL) { 713 segmentAction = endpoint->SegmentReceived(segment, buffer); 714 gSocketModule->release_socket(endpoint->socket); 715 } else if ((segment.flags & TCP_FLAG_RESET) == 0) 716 segmentAction = DROP | RESET; 717 718 if ((segmentAction & RESET) != 0) { 719 // send reset 720 endpointManager->ReplyWithReset(segment, buffer); 721 } 722 if ((segmentAction & DROP) != 0) 723 gBufferModule->free(buffer); 724 725 return B_OK; 726 } 727 728 729 status_t 730 tcp_error(uint32 code, net_buffer* data) 731 { 732 return B_ERROR; 733 } 734 735 736 status_t 737 tcp_error_reply(net_protocol* protocol, net_buffer* causedError, uint32 code, 738 void* errorData) 739 { 740 return B_ERROR; 741 } 742 743 744 // #pragma mark - 745 746 747 static status_t 748 tcp_init() 749 { 750 rw_lock_init(&sEndpointManagersLock, "endpoint managers"); 751 752 status_t status = gStackModule->register_domain_protocols(AF_INET, 753 SOCK_STREAM, 0, 754 "network/protocols/tcp/v1", 755 "network/protocols/ipv4/v1", 756 NULL); 757 if (status < B_OK) 758 return status; 759 760 status = gStackModule->register_domain_protocols(AF_INET, SOCK_STREAM, 761 IPPROTO_TCP, 762 "network/protocols/tcp/v1", 763 "network/protocols/ipv4/v1", 764 NULL); 765 if (status < B_OK) 766 return status; 767 768 status = gStackModule->register_domain_receiving_protocol(AF_INET, 769 IPPROTO_TCP, "network/protocols/tcp/v1"); 770 if (status < B_OK) 771 return status; 772 773 add_debugger_command("tcp_endpoints", dump_endpoints, 774 "lists all open TCP endpoints"); 775 add_debugger_command("tcp_endpoint", dump_endpoint, 776 "dumps a TCP endpoint internal state"); 777 778 return B_OK; 779 } 780 781 782 static status_t 783 tcp_uninit() 784 { 785 remove_debugger_command("tcp_endpoint", dump_endpoint); 786 remove_debugger_command("tcp_endpoints", dump_endpoints); 787 788 rw_lock_destroy(&sEndpointManagersLock); 789 790 for (int i = 0; i < AF_MAX; i++) { 791 delete sEndpointManagers[i]; 792 } 793 794 return B_OK; 795 } 796 797 798 static status_t 799 tcp_std_ops(int32 op, ...) 800 { 801 switch (op) { 802 case B_MODULE_INIT: 803 return tcp_init(); 804 805 case B_MODULE_UNINIT: 806 return tcp_uninit(); 807 808 default: 809 return B_ERROR; 810 } 811 } 812 813 814 net_protocol_module_info sTCPModule = { 815 { 816 "network/protocols/tcp/v1", 817 0, 818 tcp_std_ops 819 }, 820 0, 821 822 tcp_init_protocol, 823 tcp_uninit_protocol, 824 tcp_open, 825 tcp_close, 826 tcp_free, 827 tcp_connect, 828 tcp_accept, 829 tcp_control, 830 tcp_getsockopt, 831 tcp_setsockopt, 832 tcp_bind, 833 tcp_unbind, 834 tcp_listen, 835 tcp_shutdown, 836 tcp_send_data, 837 tcp_send_routed_data, 838 tcp_send_avail, 839 tcp_read_data, 840 tcp_read_avail, 841 tcp_get_domain, 842 tcp_get_mtu, 843 tcp_receive_data, 844 NULL, // deliver_data() 845 tcp_error, 846 tcp_error_reply, 847 NULL, // add_ancillary_data() 848 NULL, // process_ancillary_data() 849 NULL, // process_ancillary_data_no_container() 850 NULL, // send_data_no_buffer() 851 NULL // read_data_no_buffer() 852 }; 853 854 module_dependency module_dependencies[] = { 855 {NET_STACK_MODULE_NAME, (module_info **)&gStackModule}, 856 {NET_BUFFER_MODULE_NAME, (module_info **)&gBufferModule}, 857 {NET_DATALINK_MODULE_NAME, (module_info **)&gDatalinkModule}, 858 {NET_SOCKET_MODULE_NAME, (module_info **)&gSocketModule}, 859 {} 860 }; 861 862 module_info *modules[] = { 863 (module_info *)&sTCPModule, 864 NULL 865 }; 866