| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #define round_down(a, b) \ |
| ({ typeof(a) _a = (a); typeof(b) _b = (b); _a - (_a % _b); }) |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #include <algorithm> |
| |
| #include <android-base/stringprintf.h> |
| #include <sparse/sparse.h> |
| |
| #include "fastboot.h" |
| #include "transport.h" |
| |
| static std::string g_error; |
| |
| const std::string fb_get_error() { |
| return g_error; |
| } |
| |
| static int check_response(Transport* transport, uint32_t size, char* response) { |
| char status[65]; |
| |
| while (true) { |
| int r = transport->Read(status, 64); |
| if (r < 0) { |
| g_error = android::base::StringPrintf("status read failed (%s)", strerror(errno)); |
| transport->Close(); |
| return -1; |
| } |
| status[r] = 0; |
| |
| if (r < 4) { |
| g_error = android::base::StringPrintf("status malformed (%d bytes)", r); |
| transport->Close(); |
| return -1; |
| } |
| |
| if (!memcmp(status, "INFO", 4)) { |
| fprintf(stderr,"(bootloader) %s\n", status + 4); |
| continue; |
| } |
| |
| if (!memcmp(status, "OKAY", 4)) { |
| if (response) { |
| strcpy(response, (char*) status + 4); |
| } |
| return 0; |
| } |
| |
| if (!memcmp(status, "FAIL", 4)) { |
| if (r > 4) { |
| g_error = android::base::StringPrintf("remote: %s", status + 4); |
| } else { |
| g_error = "remote failure"; |
| } |
| return -1; |
| } |
| |
| if (!memcmp(status, "DATA", 4) && size > 0){ |
| uint32_t dsize = strtol(status + 4, 0, 16); |
| if (dsize > size) { |
| g_error = android::base::StringPrintf("data size too large (%d)", dsize); |
| transport->Close(); |
| return -1; |
| } |
| return dsize; |
| } |
| |
| g_error = "unknown status code"; |
| transport->Close(); |
| break; |
| } |
| |
| return -1; |
| } |
| |
| static int _command_start(Transport* transport, const char* cmd, uint32_t size, char* response) { |
| size_t cmdsize = strlen(cmd); |
| if (cmdsize > 64) { |
| g_error = android::base::StringPrintf("command too large (%zu)", cmdsize); |
| return -1; |
| } |
| |
| if (response) { |
| response[0] = 0; |
| } |
| |
| if (transport->Write(cmd, cmdsize) != static_cast<int>(cmdsize)) { |
| g_error = android::base::StringPrintf("command write failed (%s)", strerror(errno)); |
| transport->Close(); |
| return -1; |
| } |
| |
| return check_response(transport, size, response); |
| } |
| |
| static int _command_data(Transport* transport, const void* data, uint32_t size) { |
| int r = transport->Write(data, size); |
| if (r < 0) { |
| g_error = android::base::StringPrintf("data transfer failure (%s)", strerror(errno)); |
| transport->Close(); |
| return -1; |
| } |
| if (r != ((int) size)) { |
| g_error = "data transfer failure (short transfer)"; |
| transport->Close(); |
| return -1; |
| } |
| return r; |
| } |
| |
| static int _command_end(Transport* transport) { |
| return check_response(transport, 0, 0) < 0 ? -1 : 0; |
| } |
| |
| static int _command_send(Transport* transport, const char* cmd, const void* data, uint32_t size, |
| char* response) { |
| if (size == 0) { |
| return -1; |
| } |
| |
| int r = _command_start(transport, cmd, size, response); |
| if (r < 0) { |
| return -1; |
| } |
| |
| r = _command_data(transport, data, size); |
| if (r < 0) { |
| return -1; |
| } |
| |
| r = _command_end(transport); |
| if (r < 0) { |
| return -1; |
| } |
| |
| return size; |
| } |
| |
| static int _command_send_no_data(Transport* transport, const char* cmd, char* response) { |
| return _command_start(transport, cmd, 0, response); |
| } |
| |
| int fb_command(Transport* transport, const char* cmd) { |
| return _command_send_no_data(transport, cmd, 0); |
| } |
| |
| int fb_command_response(Transport* transport, const char* cmd, char* response) { |
| return _command_send_no_data(transport, cmd, response); |
| } |
| |
| int fb_download_data(Transport* transport, const void* data, uint32_t size) { |
| char cmd[64]; |
| snprintf(cmd, sizeof(cmd), "download:%08x", size); |
| return _command_send(transport, cmd, data, size, 0) < 0 ? -1 : 0; |
| } |
| |
| #define TRANSPORT_BUF_SIZE 1024 |
| static char transport_buf[TRANSPORT_BUF_SIZE]; |
| static int transport_buf_len; |
| |
| static int fb_download_data_sparse_write(void *priv, const void *data, int len) |
| { |
| int r; |
| Transport* transport = reinterpret_cast<Transport*>(priv); |
| int to_write; |
| const char* ptr = reinterpret_cast<const char*>(data); |
| |
| if (transport_buf_len) { |
| to_write = std::min(TRANSPORT_BUF_SIZE - transport_buf_len, len); |
| |
| memcpy(transport_buf + transport_buf_len, ptr, to_write); |
| transport_buf_len += to_write; |
| ptr += to_write; |
| len -= to_write; |
| } |
| |
| if (transport_buf_len == TRANSPORT_BUF_SIZE) { |
| r = _command_data(transport, transport_buf, TRANSPORT_BUF_SIZE); |
| if (r != TRANSPORT_BUF_SIZE) { |
| return -1; |
| } |
| transport_buf_len = 0; |
| } |
| |
| if (len > TRANSPORT_BUF_SIZE) { |
| if (transport_buf_len > 0) { |
| g_error = "internal error: transport_buf not empty"; |
| return -1; |
| } |
| to_write = round_down(len, TRANSPORT_BUF_SIZE); |
| r = _command_data(transport, ptr, to_write); |
| if (r != to_write) { |
| return -1; |
| } |
| ptr += to_write; |
| len -= to_write; |
| } |
| |
| if (len > 0) { |
| if (len > TRANSPORT_BUF_SIZE) { |
| g_error = "internal error: too much left for transport_buf"; |
| return -1; |
| } |
| memcpy(transport_buf, ptr, len); |
| transport_buf_len = len; |
| } |
| |
| return 0; |
| } |
| |
| static int fb_download_data_sparse_flush(Transport* transport) { |
| if (transport_buf_len > 0) { |
| if (_command_data(transport, transport_buf, transport_buf_len) != transport_buf_len) { |
| return -1; |
| } |
| transport_buf_len = 0; |
| } |
| return 0; |
| } |
| |
| int fb_download_data_sparse(Transport* transport, struct sparse_file* s) { |
| int size = sparse_file_len(s, true, false); |
| if (size <= 0) { |
| return -1; |
| } |
| |
| char cmd[64]; |
| snprintf(cmd, sizeof(cmd), "download:%08x", size); |
| int r = _command_start(transport, cmd, size, 0); |
| if (r < 0) { |
| return -1; |
| } |
| |
| r = sparse_file_callback(s, true, false, fb_download_data_sparse_write, transport); |
| if (r < 0) { |
| return -1; |
| } |
| |
| r = fb_download_data_sparse_flush(transport); |
| if (r < 0) { |
| return -1; |
| } |
| |
| return _command_end(transport); |
| } |