/*
Copyright 2013 to 2017 TeamWin
TWRP is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TWRP is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <zlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <sys/time.h>
#include <string>
#include <vector>
#include <fstream>
#include <sstream>
#include "twadbstream.h"
#include "libtwadbbu.hpp"
#include "twrpback.hpp"
bool twadbbu::Check_ADB_Backup_File(std::string fname) {
struct AdbBackupStreamHeader adbbuhdr;
uint32_t crc, adbbuhdrcrc;
unsigned char buf[MAX_ADB_READ];
int bytes;
int fd = open(fname.c_str(), O_RDONLY);
if (fd < 0) {
printf("Unable to open %s for reading: %s.\n", fname.c_str(), strerror(errno));
close(fd);
return false;
}
bytes = read(fd, &buf, sizeof(buf));
close(fd);
if (memcpy(&adbbuhdr, buf, sizeof(adbbuhdr)) < 0) {
printf("Unable to memcpy: %s.\n", fname.c_str(), strerror(errno));
return false;
}
adbbuhdrcrc = adbbuhdr.crc;
memset(&adbbuhdr.crc, 0, sizeof(adbbuhdr.crc));
crc = crc32(0L, Z_NULL, 0);
crc = crc32(crc, (const unsigned char*) &adbbuhdr, sizeof(adbbuhdr));
return (crc == adbbuhdrcrc);
}
std::vector<std::string> twadbbu::Get_ADB_Backup_Files(std::string fname) {
unsigned char buf[MAX_ADB_READ];
struct AdbBackupControlType structcmd;
std::vector<std::string> adb_partitions;
int fd = open(fname.c_str(), O_RDONLY);
if (fd < 0) {
printf("Unable to open %s for reading: %s\n", fname.c_str(), strerror(errno));
close(fd);
return std::vector<std::string>();
}
while (1) {
std::string cmdstr;
int readbytes;
if (readbytes = read(fd, &buf, sizeof(buf)) > 0) {
memcpy(&structcmd, buf, sizeof(structcmd));
assert(structcmd.type == TWENDADB || structcmd.type == TWIMG || structcmd.type == TWFN);
cmdstr = structcmd.type;
std::string cmdtype = cmdstr.substr(0, sizeof(structcmd.type) - 1);
if (cmdtype == TWENDADB) {
struct AdbBackupControlType endadb;
uint32_t crc, endadbcrc;
memcpy(&endadb, buf, sizeof(endadb));
endadbcrc = endadb.crc;
memset(&endadb.crc, 0, sizeof(endadb.crc));
crc = crc32(0L, Z_NULL, 0);
crc = crc32(crc, (const unsigned char*) &endadb, sizeof(endadb));
if (crc == endadbcrc) {
break;
}
else {
printf("ADB TWENDADB crc header doesn't match\n");
close(fd);
return std::vector<std::string>();
}
}
else if (cmdtype == TWIMG || cmdtype == TWFN) {
struct twfilehdr twfilehdr;
uint32_t crc, twfilehdrcrc;
memcpy(&twfilehdr, buf, sizeof(twfilehdr));
twfilehdrcrc = twfilehdr.crc;
memset(&twfilehdr.crc, 0, sizeof(twfilehdr.crc));
crc = crc32(0L, Z_NULL, 0);
crc = crc32(crc, (const unsigned char*) &twfilehdr, sizeof(twfilehdr));
if (crc == twfilehdrcrc) {
std::string adbfile = twfilehdr.name;
int pos = adbfile.find_last_of("/") + 1;
adbfile = adbfile.substr(pos, adbfile.size());
adb_partitions.push_back(adbfile);
}
else {
printf("ADB crc header doesn't match\n");
close(fd);
return std::vector<std::string>();
}
}
}
}
close(fd);
return adb_partitions;
}
bool twadbbu::Write_ADB_Stream_Header(uint64_t partition_count) {
struct AdbBackupStreamHeader twhdr;
int adb_control_bu_fd;
memset(&twhdr, 0, sizeof(twhdr));
adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY | O_NONBLOCK);
if (adb_control_bu_fd < 0) {
printf("Cannot write to TW_ADB_BU_CONTROL: %s\n", strerror(errno));
return false;
}
strncpy(twhdr.start_of_header, TWRP, sizeof(twhdr.start_of_header));
strncpy(twhdr.type, TWSTREAMHDR, sizeof(twhdr.type));
twhdr.partition_count = partition_count;
twhdr.version = ADB_BACKUP_VERSION;
memset(twhdr.space, 0, sizeof(twhdr.space));
twhdr.crc = crc32(0L, Z_NULL, 0);
twhdr.crc = crc32(twhdr.crc, (const unsigned char*) &twhdr, sizeof(twhdr));
if (write(adb_control_bu_fd, &twhdr, sizeof(twhdr)) < 0) {
printf("Cannot write to adb control channel: %s\n", strerror(errno));
close(adb_control_bu_fd);
return false;
}
return true;
}
bool twadbbu::Write_ADB_Stream_Trailer() {
int adb_control_bu_fd;
struct AdbBackupControlType endadb;
memset(&endadb, 0, sizeof(endadb));
adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY);
if (adb_control_bu_fd < 0) {
printf("Error opening adb_control_bu_fd: %s\n", strerror(errno));
return false;
}
strncpy(endadb.start_of_header, TWRP, sizeof(endadb.start_of_header));
strncpy(endadb.type, TWENDADB, sizeof(endadb.type));
endadb.crc = crc32(0L, Z_NULL, 0);
endadb.crc = crc32(endadb.crc, (const unsigned char*) &endadb, sizeof(endadb));
if (write(adb_control_bu_fd, &endadb, sizeof(endadb)) < 0) {
printf("Cannot write to ADB control: %s\n", strerror(errno));
close(adb_control_bu_fd);
return false;
}
close(adb_control_bu_fd);
return true;
}
bool twadbbu::Write_TWFN(std::string Backup_FileName, uint64_t file_size, bool use_compression) {
int adb_control_bu_fd;
adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY | O_NONBLOCK);
struct twfilehdr twfilehdr;
strncpy(twfilehdr.start_of_header, TWRP, sizeof(twfilehdr.start_of_header));
strncpy(twfilehdr.type, TWFN, sizeof(twfilehdr.type));
strncpy(twfilehdr.name, Backup_FileName.c_str(), sizeof(twfilehdr.name));
twfilehdr.size = (file_size == 0 ? 1024 : file_size);
twfilehdr.compressed = use_compression;
twfilehdr.crc = crc32(0L, Z_NULL, 0);
twfilehdr.crc = crc32(twfilehdr.crc, (const unsigned char*) &twfilehdr, sizeof(twfilehdr));
printf("Sending TWFN to adb\n");
if (write(adb_control_bu_fd, &twfilehdr, sizeof(twfilehdr)) < 1) {
printf("Cannot that write to adb_control_bu_fd: %s\n", strerror(errno));
close(adb_control_bu_fd);
return false;
}
fsync(adb_control_bu_fd);
close(adb_control_bu_fd);
return true;
}
bool twadbbu::Write_TWIMG(std::string Backup_FileName, uint64_t file_size) {
int adb_control_bu_fd;
struct twfilehdr twimghdr;
adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY | O_NONBLOCK);
strncpy(twimghdr.start_of_header, TWRP, sizeof(twimghdr.start_of_header));
strncpy(twimghdr.type, TWIMG, sizeof(twimghdr.type));
twimghdr.size = file_size;
strncpy(twimghdr.name, Backup_FileName.c_str(), sizeof(twimghdr.name));
twimghdr.crc = crc32(0L, Z_NULL, 0);
twimghdr.crc = crc32(twimghdr.crc, (const unsigned char*) &twimghdr, sizeof(twimghdr));
printf("Sending TWIMG to adb\n");
if (write(adb_control_bu_fd, &twimghdr, sizeof(twimghdr)) < 1) {
printf("Cannot write to adb control channel: %s\n", strerror(errno));
return false;
}
return true;
}
bool twadbbu::Write_TWEOF() {
struct AdbBackupControlType tweof;
int adb_control_bu_fd;
int errctr = 0;
printf("opening TW_ADB_BU_CONTROL\n");
adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY | O_NONBLOCK);
while (adb_control_bu_fd < 0) {
printf("failed to open TW_ADB_BU_CONTROL. Retrying: %s\n", strerror(errno));
adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY | O_NONBLOCK);
usleep(10000);
errctr++;
if (errctr > ADB_BU_MAX_ERROR) {
printf("Cannot write to adb_control_bu_fd: %s.\n", strerror(errno));
close(adb_control_bu_fd);
return false;
}
}
memset(&tweof, 0, sizeof(tweof));
strncpy(tweof.start_of_header, TWRP, sizeof(tweof.start_of_header));
strncpy(tweof.type, TWEOF, sizeof(tweof.type));
tweof.crc = crc32(0L, Z_NULL, 0);
tweof.crc = crc32(tweof.crc, (const unsigned char*) &tweof, sizeof(tweof));
printf("Sending TWEOF to adb backup\n");
if (write(adb_control_bu_fd, &tweof, sizeof(tweof)) < 0) {
printf("Cannot write to adb_control_bu_fd: %s.\n", strerror(errno));
close(adb_control_bu_fd);
return false;
}
close(adb_control_bu_fd);
return true;
}
bool twadbbu::Write_TWERROR() {
struct AdbBackupControlType twerror;
int adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY | O_NONBLOCK);
strncpy(twerror.start_of_header, TWRP, sizeof(twerror.start_of_header));
strncpy(twerror.type, TWERROR, sizeof(twerror.type));
memset(twerror.space, 0, sizeof(twerror.space));
twerror.crc = crc32(0L, Z_NULL, 0);
twerror.crc = crc32(twerror.crc, (const unsigned char*) &twerror, sizeof(twerror));
if (write(adb_control_bu_fd, &twerror, sizeof(twerror)) < 0) {
printf("Cannot write to adb control channel: %s\n", strerror(errno));
return false;
}
close(adb_control_bu_fd);
return true;
}
bool twadbbu::Write_TWENDADB() {
struct AdbBackupControlType endadb;
int adb_control_bu_fd = open(TW_ADB_BU_CONTROL, O_WRONLY | O_NONBLOCK);
memset(&endadb, 0, sizeof(endadb));
strncpy(endadb.start_of_header, TWRP, sizeof(endadb.start_of_header));
strncpy(endadb.type, TWENDADB, sizeof(endadb.type));
endadb.crc = crc32(0L, Z_NULL, 0);
endadb.crc = crc32(endadb.crc, (const unsigned char*) &endadb, sizeof(endadb));
printf("Sending TWENDADB to ADB Backup\n");
if (write(adb_control_bu_fd, &endadb, sizeof(endadb)) < 1) {
printf("Cannot write to ADB_CONTROL_BU_FD: %s\n", strerror(errno));
return false;
}
close(adb_control_bu_fd);
return true;
}
bool twadbbu::Write_TWDATA(FILE* adbd_fp) {
struct AdbBackupControlType data_block;
memset(&data_block, 0, sizeof(data_block));
strncpy(data_block.start_of_header, TWRP, sizeof(data_block.start_of_header));
strncpy(data_block.type, TWDATA, sizeof(data_block.type));
data_block.crc = crc32(0L, Z_NULL, 0);
data_block.crc = crc32(data_block.crc, (const unsigned char*) &data_block, sizeof(data_block));
if (fwrite(&data_block, 1, sizeof(data_block), adbd_fp) != sizeof(data_block)) {
return false;
}
return true;
}
