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358 lines
10 KiB
358 lines
10 KiB
/* |
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* Copyright (C) 2008 The Android Open Source Project |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#define round_down(a, b) \ |
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({ typeof(a) _a = (a); typeof(b) _b = (b); _a - (_a % _b); }) |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <algorithm> |
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#include <vector> |
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#include <android-base/file.h> |
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#include <android-base/stringprintf.h> |
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#include <android-base/unique_fd.h> |
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#include <sparse/sparse.h> |
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#include <utils/FileMap.h> |
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#include "fastboot.h" |
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#include "transport.h" |
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static std::string g_error; |
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using android::base::unique_fd; |
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using android::base::WriteStringToFile; |
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const std::string fb_get_error() { |
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return g_error; |
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} |
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static int64_t check_response(Transport* transport, uint32_t size, char* response) { |
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char status[65]; |
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while (true) { |
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int r = transport->Read(status, 64); |
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if (r < 0) { |
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g_error = android::base::StringPrintf("status read failed (%s)", strerror(errno)); |
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transport->Close(); |
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return -1; |
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} |
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status[r] = 0; |
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if (r < 4) { |
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g_error = android::base::StringPrintf("status malformed (%d bytes)", r); |
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transport->Close(); |
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return -1; |
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} |
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if (!memcmp(status, "INFO", 4)) { |
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fprintf(stderr,"(bootloader) %s\n", status + 4); |
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continue; |
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} |
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if (!memcmp(status, "OKAY", 4)) { |
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if (response) { |
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strcpy(response, (char*) status + 4); |
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} |
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return 0; |
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} |
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if (!memcmp(status, "FAIL", 4)) { |
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if (r > 4) { |
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g_error = android::base::StringPrintf("remote: %s", status + 4); |
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} else { |
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g_error = "remote failure"; |
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} |
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return -1; |
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} |
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if (!memcmp(status, "DATA", 4) && size > 0){ |
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uint32_t dsize = strtol(status + 4, 0, 16); |
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if (dsize > size) { |
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g_error = android::base::StringPrintf("data size too large (%d)", dsize); |
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transport->Close(); |
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return -1; |
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} |
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return dsize; |
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} |
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g_error = "unknown status code"; |
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transport->Close(); |
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break; |
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} |
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return -1; |
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} |
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static int64_t _command_start(Transport* transport, const char* cmd, uint32_t size, char* response) { |
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size_t cmdsize = strlen(cmd); |
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if (cmdsize > 64) { |
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g_error = android::base::StringPrintf("command too large (%zu)", cmdsize); |
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return -1; |
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} |
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if (response) { |
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response[0] = 0; |
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} |
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if (transport->Write(cmd, cmdsize) != static_cast<int>(cmdsize)) { |
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g_error = android::base::StringPrintf("command write failed (%s)", strerror(errno)); |
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transport->Close(); |
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return -1; |
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} |
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return check_response(transport, size, response); |
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} |
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static int64_t _command_write_data(Transport* transport, const void* data, uint32_t size) { |
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int64_t r = transport->Write(data, size); |
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if (r < 0) { |
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g_error = android::base::StringPrintf("data write failure (%s)", strerror(errno)); |
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transport->Close(); |
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return -1; |
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} |
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if (r != static_cast<int64_t>(size)) { |
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g_error = "data write failure (short transfer)"; |
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transport->Close(); |
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return -1; |
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} |
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return r; |
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} |
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static int64_t _command_read_data(Transport* transport, void* data, uint32_t size) { |
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int64_t r = transport->Read(data, size); |
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if (r < 0) { |
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g_error = android::base::StringPrintf("data read failure (%s)", strerror(errno)); |
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transport->Close(); |
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return -1; |
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} |
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if (r != (static_cast<int64_t>(size))) { |
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g_error = "data read failure (short transfer)"; |
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transport->Close(); |
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return -1; |
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} |
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return r; |
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} |
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static int64_t _command_end(Transport* transport) { |
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return check_response(transport, 0, 0) < 0 ? -1 : 0; |
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} |
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static int64_t _command_send(Transport* transport, const char* cmd, const void* data, uint32_t size, |
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char* response) { |
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if (size == 0) { |
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return -1; |
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} |
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int64_t r = _command_start(transport, cmd, size, response); |
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if (r < 0) { |
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return -1; |
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} |
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r = _command_write_data(transport, data, size); |
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if (r < 0) { |
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return -1; |
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} |
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r = _command_end(transport); |
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if (r < 0) { |
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return -1; |
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} |
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return size; |
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} |
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static int64_t _command_send_fd(Transport* transport, const char* cmd, int fd, uint32_t size, |
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char* response) { |
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static constexpr uint32_t MAX_MAP_SIZE = 512 * 1024 * 1024; |
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off64_t offset = 0; |
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uint32_t remaining = size; |
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if (_command_start(transport, cmd, size, response) < 0) { |
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return -1; |
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} |
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while (remaining) { |
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android::FileMap filemap; |
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size_t len = std::min(remaining, MAX_MAP_SIZE); |
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if (!filemap.create(NULL, fd, offset, len, true)) { |
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return -1; |
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} |
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if (_command_write_data(transport, filemap.getDataPtr(), len) < 0) { |
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return -1; |
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} |
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remaining -= len; |
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offset += len; |
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} |
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if (_command_end(transport) < 0) { |
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return -1; |
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} |
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return size; |
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} |
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static int _command_send_no_data(Transport* transport, const char* cmd, char* response) { |
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return _command_start(transport, cmd, 0, response); |
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} |
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int fb_command(Transport* transport, const char* cmd) { |
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return _command_send_no_data(transport, cmd, 0); |
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} |
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int fb_command_response(Transport* transport, const char* cmd, char* response) { |
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return _command_send_no_data(transport, cmd, response); |
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} |
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int64_t fb_download_data(Transport* transport, const void* data, uint32_t size) { |
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std::string cmd(android::base::StringPrintf("download:%08x", size)); |
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return _command_send(transport, cmd.c_str(), data, size, 0) < 0 ? -1 : 0; |
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} |
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int64_t fb_download_data_fd(Transport* transport, int fd, uint32_t size) { |
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std::string cmd(android::base::StringPrintf("download:%08x", size)); |
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return _command_send_fd(transport, cmd.c_str(), fd, size, 0) < 0 ? -1 : 0; |
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} |
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int64_t fb_upload_data(Transport* transport, const char* outfile) { |
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// positive return value is the upload size sent by the device |
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int64_t r = _command_start(transport, "upload", std::numeric_limits<int32_t>::max(), nullptr); |
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if (r <= 0) { |
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g_error = android::base::StringPrintf("command start failed (%s)", strerror(errno)); |
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return r; |
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} |
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std::string data; |
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data.resize(r); |
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if ((r = _command_read_data(transport, &data[0], data.size())) == -1) { |
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return r; |
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} |
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if (!WriteStringToFile(data, outfile, true)) { |
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g_error = android::base::StringPrintf("write to '%s' failed", outfile); |
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return -1; |
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} |
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return _command_end(transport); |
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} |
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#define TRANSPORT_BUF_SIZE 1024 |
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static char transport_buf[TRANSPORT_BUF_SIZE]; |
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static int transport_buf_len; |
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static int fb_download_data_sparse_write(void *priv, const void *data, int len) |
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{ |
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int r; |
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Transport* transport = reinterpret_cast<Transport*>(priv); |
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int to_write; |
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const char* ptr = reinterpret_cast<const char*>(data); |
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if (transport_buf_len) { |
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to_write = std::min(TRANSPORT_BUF_SIZE - transport_buf_len, len); |
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memcpy(transport_buf + transport_buf_len, ptr, to_write); |
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transport_buf_len += to_write; |
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ptr += to_write; |
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len -= to_write; |
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} |
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if (transport_buf_len == TRANSPORT_BUF_SIZE) { |
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r = _command_write_data(transport, transport_buf, TRANSPORT_BUF_SIZE); |
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if (r != TRANSPORT_BUF_SIZE) { |
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return -1; |
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} |
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transport_buf_len = 0; |
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} |
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if (len > TRANSPORT_BUF_SIZE) { |
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if (transport_buf_len > 0) { |
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g_error = "internal error: transport_buf not empty"; |
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return -1; |
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} |
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to_write = round_down(len, TRANSPORT_BUF_SIZE); |
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r = _command_write_data(transport, ptr, to_write); |
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if (r != to_write) { |
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return -1; |
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} |
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ptr += to_write; |
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len -= to_write; |
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} |
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if (len > 0) { |
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if (len > TRANSPORT_BUF_SIZE) { |
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g_error = "internal error: too much left for transport_buf"; |
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return -1; |
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} |
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memcpy(transport_buf, ptr, len); |
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transport_buf_len = len; |
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} |
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return 0; |
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} |
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static int fb_download_data_sparse_flush(Transport* transport) { |
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if (transport_buf_len > 0) { |
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int64_t r = _command_write_data(transport, transport_buf, transport_buf_len); |
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if (r != static_cast<int64_t>(transport_buf_len)) { |
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return -1; |
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} |
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transport_buf_len = 0; |
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} |
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return 0; |
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} |
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int fb_download_data_sparse(Transport* transport, struct sparse_file* s) { |
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int size = sparse_file_len(s, true, false); |
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if (size <= 0) { |
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return -1; |
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} |
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std::string cmd(android::base::StringPrintf("download:%08x", size)); |
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int r = _command_start(transport, cmd.c_str(), size, 0); |
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if (r < 0) { |
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return -1; |
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} |
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r = sparse_file_callback(s, true, false, fb_download_data_sparse_write, transport); |
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if (r < 0) { |
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return -1; |
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} |
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r = fb_download_data_sparse_flush(transport); |
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if (r < 0) { |
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return -1; |
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} |
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return _command_end(transport); |
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}
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