/*
* 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 <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <algorithm>
#include <vector>
#include <android-base/file.h>
#include <android-base/stringprintf.h>
#include <android-base/unique_fd.h>
#include <sparse/sparse.h>
#include <utils/FileMap.h>
#include "fastboot.h"
#include "transport.h"
static std::string g_error;
using android::base::unique_fd;
using android::base::WriteStringToFile;
const std::string fb_get_error() {
return g_error;
}
static int64_t 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 int64_t _command_start(Transport* transport, const std::string& cmd, uint32_t size,
char* response) {
if (cmd.size() > 64) {
g_error = android::base::StringPrintf("command too large (%zu)", cmd.size());
return -1;
}
if (response) {
response[0] = 0;
}
if (transport->Write(cmd.c_str(), cmd.size()) != static_cast<int>(cmd.size())) {
g_error = android::base::StringPrintf("command write failed (%s)", strerror(errno));
transport->Close();
return -1;
}
return check_response(transport, size, response);
}
static int64_t _command_write_data(Transport* transport, const void* data, uint32_t size) {
int64_t r = transport->Write(data, size);
if (r < 0) {
g_error = android::base::StringPrintf("data write failure (%s)", strerror(errno));
transport->Close();
return -1;
}
if (r != static_cast<int64_t>(size)) {
g_error = "data write failure (short transfer)";
transport->Close();
return -1;
}
return r;
}
static int64_t _command_read_data(Transport* transport, void* data, uint32_t size) {
int64_t r = transport->Read(data, size);
if (r < 0) {
g_error = android::base::StringPrintf("data read failure (%s)", strerror(errno));
transport->Close();
return -1;
}
if (r != (static_cast<int64_t>(size))) {
g_error = "data read failure (short transfer)";
transport->Close();
return -1;
}
return r;
}
static int64_t _command_end(Transport* transport) {
return check_response(transport, 0, 0) < 0 ? -1 : 0;
}
static int64_t _command_send(Transport* transport, const std::string& cmd, const void* data,
uint32_t size, char* response) {
if (size == 0) {
return -1;
}
int64_t r = _command_start(transport, cmd, size, response);
if (r < 0) {
return -1;
}
r = _command_write_data(transport, data, size);
if (r < 0) {
return -1;
}
r = _command_end(transport);
if (r < 0) {
return -1;
}
return size;
}
static int64_t _command_send_fd(Transport* transport, const std::string& cmd, int fd, uint32_t size,
char* response) {
static constexpr uint32_t MAX_MAP_SIZE = 512 * 1024 * 1024;
off64_t offset = 0;
uint32_t remaining = size;
if (_command_start(transport, cmd, size, response) < 0) {
return -1;
}
while (remaining) {
android::FileMap filemap;
size_t len = std::min(remaining, MAX_MAP_SIZE);
if (!filemap.create(NULL, fd, offset, len, true)) {
return -1;
}
if (_command_write_data(transport, filemap.getDataPtr(), len) < 0) {
return -1;
}
remaining -= len;
offset += len;
}
if (_command_end(transport) < 0) {
return -1;
}
return size;
}
static int _command_send_no_data(Transport* transport, const std::string& cmd, char* response) {
return _command_start(transport, cmd, 0, response);
}
int fb_command(Transport* transport, const std::string& cmd) {
return _command_send_no_data(transport, cmd, 0);
}
int fb_command_response(Transport* transport, const std::string& cmd, char* response) {
return _command_send_no_data(transport, cmd, response);
}
int64_t fb_download_data(Transport* transport, const void* data, uint32_t size) {
std::string cmd(android::base::StringPrintf("download:%08x", size));
return _command_send(transport, cmd.c_str(), data, size, 0) < 0 ? -1 : 0;
}
int64_t fb_download_data_fd(Transport* transport, int fd, uint32_t size) {
std::string cmd(android::base::StringPrintf("download:%08x", size));
return _command_send_fd(transport, cmd.c_str(), fd, size, 0) < 0 ? -1 : 0;
}
int64_t fb_upload_data(Transport* transport, const char* outfile) {
// positive return value is the upload size sent by the device
int64_t r = _command_start(transport, "upload", std::numeric_limits<int32_t>::max(), nullptr);
if (r <= 0) {
g_error = android::base::StringPrintf("command start failed (%s)", strerror(errno));
return r;
}
std::string data;
data.resize(r);
if ((r = _command_read_data(transport, &data[0], data.size())) == -1) {
return r;
}
if (!WriteStringToFile(data, outfile, true)) {
g_error = android::base::StringPrintf("write to '%s' failed", outfile);
return -1;
}
return _command_end(transport);
}
#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_write_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_write_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) {
int64_t r = _command_write_data(transport, transport_buf, transport_buf_len);
if (r != static_cast<int64_t>(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;
}
std::string cmd(android::base::StringPrintf("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);
}