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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define TRACE_TAG TRACE_RWX
#include "adb_io.h"
#include <unistd.h>
#include <base/stringprintf.h>
#include "adb_trace.h"
#include "adb_utils.h"
#include "sysdeps.h"
bool SendProtocolString(int fd, const std::string& s) {
int length = s.size();
if (length > 0xffff) {
length = 0xffff;
}
return WriteFdFmt(fd, "%04x", length) && WriteFdExactly(fd, s);
}
bool SendOkay(int fd) {
return WriteFdExactly(fd, "OKAY", 4);
}
bool SendFail(int fd, const std::string& reason) {
return WriteFdExactly(fd, "FAIL", 4) && SendProtocolString(fd, reason);
}
bool ReadFdExactly(int fd, void* buf, size_t len) {
char* p = reinterpret_cast<char*>(buf);
size_t len0 = len;
D("readx: fd=%d wanted=%zu\n", fd, len);
while (len > 0) {
int r = adb_read(fd, p, len);
if (r > 0) {
len -= r;
p += r;
} else if (r == -1) {
D("readx: fd=%d error %d: %s\n", fd, errno, strerror(errno));
return false;
} else {
D("readx: fd=%d disconnected\n", fd);
errno = 0;
return false;
}
}
D("readx: fd=%d wanted=%zu got=%zu\n", fd, len0, len0 - len);
if (ADB_TRACING) {
dump_hex(reinterpret_cast<const unsigned char*>(buf), len0);
}
return true;
}
bool WriteFdExactly(int fd, const void* buf, size_t len) {
const char* p = reinterpret_cast<const char*>(buf);
int r;
D("writex: fd=%d len=%d: ", fd, (int)len);
if (ADB_TRACING) {
dump_hex(reinterpret_cast<const unsigned char*>(buf), len);
}
while (len > 0) {
r = adb_write(fd, p, len);
if (r == -1) {
D("writex: fd=%d error %d: %s\n", fd, errno, strerror(errno));
if (errno == EAGAIN) {
adb_sleep_ms(1); // just yield some cpu time
continue;
} else if (errno == EPIPE) {
D("writex: fd=%d disconnected\n", fd);
errno = 0;
return false;
} else {
return false;
}
} else {
len -= r;
p += r;
}
}
return true;
}
bool WriteFdExactly(int fd, const char* str) {
return WriteFdExactly(fd, str, strlen(str));
}
bool WriteFdExactly(int fd, const std::string& str) {
return WriteFdExactly(fd, str.c_str(), str.size());
}
bool WriteFdFmt(int fd, const char* fmt, ...) {
std::string str;
va_list ap;
va_start(ap, fmt);
android::base::StringAppendV(&str, fmt, ap);
va_end(ap);
return WriteFdExactly(fd, str);
}
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