277 lines
7.8 KiB
C++
277 lines
7.8 KiB
C++
/*
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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 <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 <android-base/stringprintf.h>
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#include <sparse/sparse.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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const std::string fb_get_error() {
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return g_error;
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}
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static int 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 int _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 int _command_data(Transport* transport, const void* data, uint32_t size) {
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int r = transport->Write(data, size);
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if (r < 0) {
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g_error = android::base::StringPrintf("data transfer 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 != ((int) size)) {
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g_error = "data transfer 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 int _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 int _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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int 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_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 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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int fb_download_data(Transport* transport, const void* data, uint32_t size) {
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char cmd[64];
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snprintf(cmd, sizeof(cmd), "download:%08x", size);
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return _command_send(transport, cmd, data, size, 0) < 0 ? -1 : 0;
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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_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_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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if (_command_data(transport, transport_buf, transport_buf_len) != 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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char cmd[64];
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snprintf(cmd, sizeof(cmd), "download:%08x", size);
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int r = _command_start(transport, cmd, 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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