transport.c revision dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <stdio.h> 18#include <stdlib.h> 19#include <unistd.h> 20#include <string.h> 21#include <errno.h> 22 23#include "sysdeps.h" 24 25#define TRACE_TAG TRACE_TRANSPORT 26#include "adb.h" 27 28static void transport_unref(atransport *t); 29 30static atransport transport_list = { 31 .next = &transport_list, 32 .prev = &transport_list, 33}; 34 35ADB_MUTEX_DEFINE( transport_lock ); 36 37#if ADB_TRACE 38static void dump_hex( const unsigned char* ptr, size_t len ) 39{ 40 int nn, len2 = len; 41 42 if (len2 > 16) len2 = 16; 43 44 for (nn = 0; nn < len2; nn++) 45 D("%02x", ptr[nn]); 46 D(" "); 47 48 for (nn = 0; nn < len2; nn++) { 49 int c = ptr[nn]; 50 if (c < 32 || c > 127) 51 c = '.'; 52 D("%c", c); 53 } 54 D("\n"); 55 fflush(stdout); 56} 57#endif 58 59void 60kick_transport(atransport* t) 61{ 62 if (t && !t->kicked) 63 { 64 int kicked; 65 66 adb_mutex_lock(&transport_lock); 67 kicked = t->kicked; 68 if (!kicked) 69 t->kicked = 1; 70 adb_mutex_unlock(&transport_lock); 71 72 if (!kicked) 73 t->kick(t); 74 } 75} 76 77void 78run_transport_disconnects(atransport* t) 79{ 80 adisconnect* dis = t->disconnects.next; 81 82 D("run_transport_disconnects: %p (%s)\n", t, t->serial ? t->serial : "unknown" ); 83 while (dis != &t->disconnects) { 84 adisconnect* next = dis->next; 85 dis->func( dis->opaque, t ); 86 dis = next; 87 } 88} 89 90static int 91read_packet(int fd, apacket** ppacket) 92{ 93 char *p = (char*)ppacket; /* really read a packet address */ 94 int r; 95 int len = sizeof(*ppacket); 96 while(len > 0) { 97 r = adb_read(fd, p, len); 98 if(r > 0) { 99 len -= r; 100 p += r; 101 } else { 102 D("read_packet: %d error %d %d\n", fd, r, errno); 103 if((r < 0) && (errno == EINTR)) continue; 104 return -1; 105 } 106 } 107 108#if ADB_TRACE 109 if (ADB_TRACING) 110 { 111 unsigned command = (*ppacket)->msg.command; 112 int len = (*ppacket)->msg.data_length; 113 char cmd[5]; 114 int n; 115 116 for (n = 0; n < 4; n++) { 117 int b = (command >> (n*8)) & 255; 118 if (b >= 32 && b < 127) 119 cmd[n] = (char)b; 120 else 121 cmd[n] = '.'; 122 } 123 cmd[4] = 0; 124 125 D("read_packet: %d ok: [%08x %s] %08x %08x (%d) ", 126 fd, command, cmd, (*ppacket)->msg.arg0, (*ppacket)->msg.arg1, len); 127 dump_hex((*ppacket)->data, len); 128 } 129#endif 130 return 0; 131} 132 133static int 134write_packet(int fd, apacket** ppacket) 135{ 136 char *p = (char*) ppacket; /* we really write the packet address */ 137 int r, len = sizeof(ppacket); 138 139#if ADB_TRACE 140 if (ADB_TRACING) 141 { 142 unsigned command = (*ppacket)->msg.command; 143 int len = (*ppacket)->msg.data_length; 144 char cmd[5]; 145 int n; 146 147 for (n = 0; n < 4; n++) { 148 int b = (command >> (n*8)) & 255; 149 if (b >= 32 && b < 127) 150 cmd[n] = (char)b; 151 else 152 cmd[n] = '.'; 153 } 154 cmd[4] = 0; 155 156 D("write_packet: %d [%08x %s] %08x %08x (%d) ", 157 fd, command, cmd, (*ppacket)->msg.arg0, (*ppacket)->msg.arg1, len); 158 dump_hex((*ppacket)->data, len); 159 } 160#endif 161 len = sizeof(ppacket); 162 while(len > 0) { 163 r = adb_write(fd, p, len); 164 if(r > 0) { 165 len -= r; 166 p += r; 167 } else { 168 D("write_packet: %d error %d %d\n", fd, r, errno); 169 if((r < 0) && (errno == EINTR)) continue; 170 return -1; 171 } 172 } 173 return 0; 174} 175 176static void transport_socket_events(int fd, unsigned events, void *_t) 177{ 178 if(events & FDE_READ){ 179 apacket *p = 0; 180 if(read_packet(fd, &p)){ 181 D("failed to read packet from transport socket on fd %d\n", fd); 182 } else { 183 handle_packet(p, (atransport *) _t); 184 } 185 } 186} 187 188void send_packet(apacket *p, atransport *t) 189{ 190 unsigned char *x; 191 unsigned sum; 192 unsigned count; 193 194 p->msg.magic = p->msg.command ^ 0xffffffff; 195 196 count = p->msg.data_length; 197 x = (unsigned char *) p->data; 198 sum = 0; 199 while(count-- > 0){ 200 sum += *x++; 201 } 202 p->msg.data_check = sum; 203 204 print_packet("send", p); 205 206 if (t == NULL) { 207 fatal_errno("Transport is null"); 208 D("Transport is null \n"); 209 } 210 211 if(write_packet(t->transport_socket, &p)){ 212 fatal_errno("cannot enqueue packet on transport socket"); 213 } 214} 215 216/* The transport is opened by transport_register_func before 217** the input and output threads are started. 218** 219** The output thread issues a SYNC(1, token) message to let 220** the input thread know to start things up. In the event 221** of transport IO failure, the output thread will post a 222** SYNC(0,0) message to ensure shutdown. 223** 224** The transport will not actually be closed until both 225** threads exit, but the input thread will kick the transport 226** on its way out to disconnect the underlying device. 227*/ 228 229static void *output_thread(void *_t) 230{ 231 atransport *t = _t; 232 apacket *p; 233 234 D("from_remote: starting thread for transport %p, on fd %d\n", t, t->fd ); 235 236 D("from_remote: transport %p SYNC online (%d)\n", t, t->sync_token + 1); 237 p = get_apacket(); 238 p->msg.command = A_SYNC; 239 p->msg.arg0 = 1; 240 p->msg.arg1 = ++(t->sync_token); 241 p->msg.magic = A_SYNC ^ 0xffffffff; 242 if(write_packet(t->fd, &p)) { 243 put_apacket(p); 244 D("from_remote: failed to write SYNC apacket to transport %p", t); 245 goto oops; 246 } 247 248 D("from_remote: data pump for transport %p\n", t); 249 for(;;) { 250 p = get_apacket(); 251 252 if(t->read_from_remote(p, t) == 0){ 253 D("from_remote: received remote packet, sending to transport %p\n", 254 t); 255 if(write_packet(t->fd, &p)){ 256 put_apacket(p); 257 D("from_remote: failed to write apacket to transport %p", t); 258 goto oops; 259 } 260 } else { 261 D("from_remote: remote read failed for transport %p\n", p); 262 put_apacket(p); 263 break; 264 } 265 } 266 267 D("from_remote: SYNC offline for transport %p\n", t); 268 p = get_apacket(); 269 p->msg.command = A_SYNC; 270 p->msg.arg0 = 0; 271 p->msg.arg1 = 0; 272 p->msg.magic = A_SYNC ^ 0xffffffff; 273 if(write_packet(t->fd, &p)) { 274 put_apacket(p); 275 D("from_remote: failed to write SYNC apacket to transport %p", t); 276 } 277 278oops: 279 D("from_remote: thread is exiting for transport %p\n", t); 280 kick_transport(t); 281 transport_unref(t); 282 return 0; 283} 284 285static void *input_thread(void *_t) 286{ 287 atransport *t = _t; 288 apacket *p; 289 int active = 0; 290 291 D("to_remote: starting input_thread for %p, reading from fd %d\n", 292 t, t->fd); 293 294 for(;;){ 295 if(read_packet(t->fd, &p)) { 296 D("to_remote: failed to read apacket from transport %p on fd %d\n", 297 t, t->fd ); 298 break; 299 } 300 if(p->msg.command == A_SYNC){ 301 if(p->msg.arg0 == 0) { 302 D("to_remote: transport %p SYNC offline\n", t); 303 put_apacket(p); 304 break; 305 } else { 306 if(p->msg.arg1 == t->sync_token) { 307 D("to_remote: transport %p SYNC online\n", t); 308 active = 1; 309 } else { 310 D("to_remote: trandport %p ignoring SYNC %d != %d\n", 311 t, p->msg.arg1, t->sync_token); 312 } 313 } 314 } else { 315 if(active) { 316 D("to_remote: transport %p got packet, sending to remote\n", t); 317 t->write_to_remote(p, t); 318 } else { 319 D("to_remote: transport %p ignoring packet while offline\n", t); 320 } 321 } 322 323 put_apacket(p); 324 } 325 326 // this is necessary to avoid a race condition that occured when a transport closes 327 // while a client socket is still active. 328 close_all_sockets(t); 329 330 D("to_remote: thread is exiting for transport %p, fd %d\n", t, t->fd); 331 kick_transport(t); 332 transport_unref(t); 333 return 0; 334} 335 336 337static int transport_registration_send = -1; 338static int transport_registration_recv = -1; 339static fdevent transport_registration_fde; 340 341 342#if ADB_HOST 343static int list_transports_msg(char* buffer, size_t bufferlen) 344{ 345 char head[5]; 346 int len; 347 348 len = list_transports(buffer+4, bufferlen-4); 349 snprintf(head, sizeof(head), "%04x", len); 350 memcpy(buffer, head, 4); 351 len += 4; 352 return len; 353} 354 355/* this adds support required by the 'track-devices' service. 356 * this is used to send the content of "list_transport" to any 357 * number of client connections that want it through a single 358 * live TCP connection 359 */ 360typedef struct device_tracker device_tracker; 361struct device_tracker { 362 asocket socket; 363 int update_needed; 364 device_tracker* next; 365}; 366 367/* linked list of all device trackers */ 368static device_tracker* device_tracker_list; 369 370static void 371device_tracker_remove( device_tracker* tracker ) 372{ 373 device_tracker** pnode = &device_tracker_list; 374 device_tracker* node = *pnode; 375 376 adb_mutex_lock( &transport_lock ); 377 while (node) { 378 if (node == tracker) { 379 *pnode = node->next; 380 break; 381 } 382 pnode = &node->next; 383 node = *pnode; 384 } 385 adb_mutex_unlock( &transport_lock ); 386} 387 388static void 389device_tracker_close( asocket* socket ) 390{ 391 device_tracker* tracker = (device_tracker*) socket; 392 asocket* peer = socket->peer; 393 394 D( "device tracker %p removed\n", tracker); 395 if (peer) { 396 peer->peer = NULL; 397 peer->close(peer); 398 } 399 device_tracker_remove(tracker); 400 free(tracker); 401} 402 403static int 404device_tracker_enqueue( asocket* socket, apacket* p ) 405{ 406 /* you can't read from a device tracker, close immediately */ 407 put_apacket(p); 408 device_tracker_close(socket); 409 return -1; 410} 411 412static int 413device_tracker_send( device_tracker* tracker, 414 const char* buffer, 415 int len ) 416{ 417 apacket* p = get_apacket(); 418 asocket* peer = tracker->socket.peer; 419 420 memcpy(p->data, buffer, len); 421 p->len = len; 422 return peer->enqueue( peer, p ); 423} 424 425 426static void 427device_tracker_ready( asocket* socket ) 428{ 429 device_tracker* tracker = (device_tracker*) socket; 430 431 /* we want to send the device list when the tracker connects 432 * for the first time, even if no update occured */ 433 if (tracker->update_needed > 0) { 434 char buffer[1024]; 435 int len; 436 437 tracker->update_needed = 0; 438 439 len = list_transports_msg(buffer, sizeof(buffer)); 440 device_tracker_send(tracker, buffer, len); 441 } 442} 443 444 445asocket* 446create_device_tracker(void) 447{ 448 device_tracker* tracker = calloc(1,sizeof(*tracker)); 449 450 if(tracker == 0) fatal("cannot allocate device tracker"); 451 452 D( "device tracker %p created\n", tracker); 453 454 tracker->socket.enqueue = device_tracker_enqueue; 455 tracker->socket.ready = device_tracker_ready; 456 tracker->socket.close = device_tracker_close; 457 tracker->update_needed = 1; 458 459 tracker->next = device_tracker_list; 460 device_tracker_list = tracker; 461 462 return &tracker->socket; 463} 464 465 466/* call this function each time the transport list has changed */ 467void update_transports(void) 468{ 469 char buffer[1024]; 470 int len; 471 device_tracker* tracker; 472 473 len = list_transports_msg(buffer, sizeof(buffer)); 474 475 tracker = device_tracker_list; 476 while (tracker != NULL) { 477 device_tracker* next = tracker->next; 478 /* note: this may destroy the tracker if the connection is closed */ 479 device_tracker_send(tracker, buffer, len); 480 tracker = next; 481 } 482} 483#else 484void update_transports(void) 485{ 486 // nothing to do on the device side 487} 488#endif // ADB_HOST 489 490typedef struct tmsg tmsg; 491struct tmsg 492{ 493 atransport *transport; 494 int action; 495}; 496 497static int 498transport_read_action(int fd, struct tmsg* m) 499{ 500 char *p = (char*)m; 501 int len = sizeof(*m); 502 int r; 503 504 while(len > 0) { 505 r = adb_read(fd, p, len); 506 if(r > 0) { 507 len -= r; 508 p += r; 509 } else { 510 if((r < 0) && (errno == EINTR)) continue; 511 D("transport_read_action: on fd %d, error %d: %s\n", 512 fd, errno, strerror(errno)); 513 return -1; 514 } 515 } 516 return 0; 517} 518 519static int 520transport_write_action(int fd, struct tmsg* m) 521{ 522 char *p = (char*)m; 523 int len = sizeof(*m); 524 int r; 525 526 while(len > 0) { 527 r = adb_write(fd, p, len); 528 if(r > 0) { 529 len -= r; 530 p += r; 531 } else { 532 if((r < 0) && (errno == EINTR)) continue; 533 D("transport_write_action: on fd %d, error %d: %s\n", 534 fd, errno, strerror(errno)); 535 return -1; 536 } 537 } 538 return 0; 539} 540 541static void transport_registration_func(int _fd, unsigned ev, void *data) 542{ 543 tmsg m; 544 adb_thread_t output_thread_ptr; 545 adb_thread_t input_thread_ptr; 546 int s[2]; 547 atransport *t; 548 549 if(!(ev & FDE_READ)) { 550 return; 551 } 552 553 if(transport_read_action(_fd, &m)) { 554 fatal_errno("cannot read transport registration socket"); 555 } 556 557 t = m.transport; 558 559 if(m.action == 0){ 560 D("transport: %p removing and free'ing %d\n", t, t->transport_socket); 561 562 /* IMPORTANT: the remove closes one half of the 563 ** socket pair. The close closes the other half. 564 */ 565 fdevent_remove(&(t->transport_fde)); 566 adb_close(t->fd); 567 568 adb_mutex_lock(&transport_lock); 569 t->next->prev = t->prev; 570 t->prev->next = t->next; 571 adb_mutex_unlock(&transport_lock); 572 573 run_transport_disconnects(t); 574 575 if (t->product) 576 free(t->product); 577 if (t->serial) 578 free(t->serial); 579 580 memset(t,0xee,sizeof(atransport)); 581 free(t); 582 583 update_transports(); 584 return; 585 } 586 587 /* initial references are the two threads */ 588 t->ref_count = 2; 589 590 if(adb_socketpair(s)) { 591 fatal_errno("cannot open transport socketpair"); 592 } 593 594 D("transport: %p (%d,%d) starting\n", t, s[0], s[1]); 595 596 t->transport_socket = s[0]; 597 t->fd = s[1]; 598 599 /* put us on the master device list */ 600 adb_mutex_lock(&transport_lock); 601 t->next = &transport_list; 602 t->prev = transport_list.prev; 603 t->next->prev = t; 604 t->prev->next = t; 605 adb_mutex_unlock(&transport_lock); 606 607 D("transport: %p install %d\n", t, t->transport_socket ); 608 fdevent_install(&(t->transport_fde), 609 t->transport_socket, 610 transport_socket_events, 611 t); 612 613 fdevent_set(&(t->transport_fde), FDE_READ); 614 615 if(adb_thread_create(&input_thread_ptr, input_thread, t)){ 616 fatal_errno("cannot create input thread"); 617 } 618 619 if(adb_thread_create(&output_thread_ptr, output_thread, t)){ 620 fatal_errno("cannot create output thread"); 621 } 622 623 t->disconnects.next = t->disconnects.prev = &t->disconnects; 624 625 update_transports(); 626} 627 628void init_transport_registration(void) 629{ 630 int s[2]; 631 632 if(adb_socketpair(s)){ 633 fatal_errno("cannot open transport registration socketpair"); 634 } 635 636 transport_registration_send = s[0]; 637 transport_registration_recv = s[1]; 638 639 fdevent_install(&transport_registration_fde, 640 transport_registration_recv, 641 transport_registration_func, 642 0); 643 644 fdevent_set(&transport_registration_fde, FDE_READ); 645} 646 647/* the fdevent select pump is single threaded */ 648static void register_transport(atransport *transport) 649{ 650 tmsg m; 651 m.transport = transport; 652 m.action = 1; 653 D("transport: %p registered\n", transport); 654 if(transport_write_action(transport_registration_send, &m)) { 655 fatal_errno("cannot write transport registration socket\n"); 656 } 657} 658 659static void remove_transport(atransport *transport) 660{ 661 tmsg m; 662 m.transport = transport; 663 m.action = 0; 664 D("transport: %p removed\n", transport); 665 if(transport_write_action(transport_registration_send, &m)) { 666 fatal_errno("cannot write transport registration socket\n"); 667 } 668} 669 670 671static void transport_unref(atransport *t) 672{ 673 if (t) { 674 adb_mutex_lock(&transport_lock); 675 t->ref_count--; 676 D("transport: %p R- (ref=%d)\n", t, t->ref_count); 677 if (t->ref_count == 0) { 678 D("transport: %p kicking and closing\n", t); 679 if (!t->kicked) { 680 t->kicked = 1; 681 t->kick(t); 682 } 683 t->close(t); 684 remove_transport(t); 685 } 686 adb_mutex_unlock(&transport_lock); 687 } 688} 689 690void add_transport_disconnect(atransport* t, adisconnect* dis) 691{ 692 adb_mutex_lock(&transport_lock); 693 dis->next = &t->disconnects; 694 dis->prev = dis->next->prev; 695 dis->prev->next = dis; 696 dis->next->prev = dis; 697 adb_mutex_unlock(&transport_lock); 698} 699 700void remove_transport_disconnect(atransport* t, adisconnect* dis) 701{ 702 dis->prev->next = dis->next; 703 dis->next->prev = dis->prev; 704 dis->next = dis->prev = dis; 705} 706 707 708atransport *acquire_one_transport(int state, transport_type ttype, const char* serial, char** error_out) 709{ 710 atransport *t; 711 atransport *result = NULL; 712 int ambiguous = 0; 713 714retry: 715 if (error_out) 716 *error_out = "device not found"; 717 718 adb_mutex_lock(&transport_lock); 719 for (t = transport_list.next; t != &transport_list; t = t->next) { 720 /* check for matching serial number */ 721 if (serial) { 722 if (t->serial && !strcmp(serial, t->serial)) { 723 result = t; 724 break; 725 } 726 } else { 727 if (ttype == kTransportUsb && t->type == kTransportUsb) { 728 if (result) { 729 if (error_out) 730 *error_out = "more than one device"; 731 ambiguous = 1; 732 result = NULL; 733 break; 734 } 735 result = t; 736 } else if (ttype == kTransportLocal && t->type == kTransportLocal) { 737 if (result) { 738 if (error_out) 739 *error_out = "more than one emulator"; 740 ambiguous = 1; 741 result = NULL; 742 break; 743 } 744 result = t; 745 } else if (ttype == kTransportAny) { 746 if (result) { 747 if (error_out) 748 *error_out = "more than one device and emulator"; 749 ambiguous = 1; 750 result = NULL; 751 break; 752 } 753 result = t; 754 } 755 } 756 } 757 adb_mutex_unlock(&transport_lock); 758 759 if (result) { 760 /* offline devices are ignored -- they are either being born or dying */ 761 if (result && result->connection_state == CS_OFFLINE) { 762 if (error_out) 763 *error_out = "device offline"; 764 result = NULL; 765 } 766 767 /* check for required connection state */ 768 if (result && state != CS_ANY && result->connection_state != state) { 769 if (error_out) 770 *error_out = "invalid device state"; 771 result = NULL; 772 } 773 } 774 775 if (result) { 776 /* found one that we can take */ 777 if (error_out) 778 *error_out = NULL; 779 } else if (state != CS_ANY && (serial || !ambiguous)) { 780 adb_sleep_ms(1000); 781 goto retry; 782 } 783 784 return result; 785} 786 787#if ADB_HOST 788static const char *statename(atransport *t) 789{ 790 switch(t->connection_state){ 791 case CS_OFFLINE: return "offline"; 792 case CS_BOOTLOADER: return "bootloader"; 793 case CS_DEVICE: return "device"; 794 case CS_HOST: return "host"; 795 case CS_RECOVERY: return "recovery"; 796 default: return "unknown"; 797 } 798} 799 800int list_transports(char *buf, size_t bufsize) 801{ 802 char* p = buf; 803 char* end = buf + bufsize; 804 int len; 805 atransport *t; 806 807 /* XXX OVERRUN PROBLEMS XXX */ 808 adb_mutex_lock(&transport_lock); 809 for(t = transport_list.next; t != &transport_list; t = t->next) { 810 len = snprintf(p, end - p, "%s\t%s\n", 811 t->serial ? t->serial : "", 812 statename(t)); 813 814 if (p + len >= end) { 815 /* discard last line if buffer is too short */ 816 break; 817 } 818 p += len; 819 } 820 p[0] = 0; 821 adb_mutex_unlock(&transport_lock); 822 return p - buf; 823} 824 825 826/* hack for osx */ 827void close_usb_devices() 828{ 829 atransport *t; 830 831 adb_mutex_lock(&transport_lock); 832 for(t = transport_list.next; t != &transport_list; t = t->next) { 833 if ( !t->kicked ) { 834 t->kicked = 1; 835 t->kick(t); 836 } 837 } 838 adb_mutex_unlock(&transport_lock); 839} 840#endif // ADB_HOST 841 842void register_socket_transport(int s, const char *serial, int port) 843{ 844 atransport *t = calloc(1, sizeof(atransport)); 845 D("transport: %p init'ing for socket %d, on port %d\n", t, s, port); 846 if ( init_socket_transport(t, s, port) < 0 ) { 847 adb_close(s); 848 free(t); 849 return; 850 } 851 if(serial) { 852 t->serial = strdup(serial); 853 } 854 register_transport(t); 855} 856 857void register_usb_transport(usb_handle *usb, const char *serial) 858{ 859 atransport *t = calloc(1, sizeof(atransport)); 860 D("transport: %p init'ing for usb_handle %p (sn='%s')\n", t, usb, 861 serial ? serial : ""); 862 init_usb_transport(t, usb); 863 if(serial) { 864 t->serial = strdup(serial); 865 } 866 register_transport(t); 867} 868 869 870#undef TRACE_TAG 871#define TRACE_TAG TRACE_RWX 872 873int readx(int fd, void *ptr, size_t len) 874{ 875 char *p = ptr; 876 int r; 877#if ADB_TRACE 878 int len0 = len; 879#endif 880 D("readx: %d %p %d\n", fd, ptr, (int)len); 881 while(len > 0) { 882 r = adb_read(fd, p, len); 883 if(r > 0) { 884 len -= r; 885 p += r; 886 } else { 887 D("readx: %d %d %s\n", fd, r, strerror(errno)); 888 if((r < 0) && (errno == EINTR)) continue; 889 return -1; 890 } 891 } 892 893#if ADB_TRACE 894 D("readx: %d ok: ", fd); 895 dump_hex( ptr, len0 ); 896#endif 897 return 0; 898} 899 900int writex(int fd, const void *ptr, size_t len) 901{ 902 char *p = (char*) ptr; 903 int r; 904 905#if ADB_TRACE 906 D("writex: %d %p %d: ", fd, ptr, (int)len); 907 dump_hex( ptr, len ); 908#endif 909 while(len > 0) { 910 r = adb_write(fd, p, len); 911 if(r > 0) { 912 len -= r; 913 p += r; 914 } else { 915 D("writex: %d %d %s\n", fd, r, strerror(errno)); 916 if((r < 0) && (errno == EINTR)) continue; 917 return -1; 918 } 919 } 920 921 D("writex: %d ok\n", fd); 922 return 0; 923} 924 925int check_header(apacket *p) 926{ 927 if(p->msg.magic != (p->msg.command ^ 0xffffffff)) { 928 D("check_header(): invalid magic\n"); 929 return -1; 930 } 931 932 if(p->msg.data_length > MAX_PAYLOAD) { 933 D("check_header(): %d > MAX_PAYLOAD\n", p->msg.data_length); 934 return -1; 935 } 936 937 return 0; 938} 939 940int check_data(apacket *p) 941{ 942 unsigned count, sum; 943 unsigned char *x; 944 945 count = p->msg.data_length; 946 x = p->data; 947 sum = 0; 948 while(count-- > 0) { 949 sum += *x++; 950 } 951 952 if(sum != p->msg.data_check) { 953 return -1; 954 } else { 955 return 0; 956 } 957} 958 959