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/*
* Copyright (C) 2020 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.
*/
#include <binder/RpcAddress.h>
#include <binder/Parcel.h>
#include "Debug.h"
#include "RpcState.h"
#include "RpcWireFormat.h"
namespace android {
RpcAddress RpcAddress::zero() {
return RpcAddress();
}
bool RpcAddress::isZero() const {
RpcWireAddress ZERO{0};
return memcmp(mRawAddr.get(), &ZERO, sizeof(RpcWireAddress)) == 0;
}
static void ReadRandomBytes(uint8_t* buf, size_t len) {
int fd = TEMP_FAILURE_RETRY(open("/dev/urandom", O_RDONLY | O_CLOEXEC | O_NOFOLLOW));
if (fd == -1) {
ALOGE("%s: cannot read /dev/urandom", __func__);
return;
}
size_t n;
while ((n = TEMP_FAILURE_RETRY(read(fd, buf, len))) > 0) {
len -= n;
buf += n;
}
if (len > 0) {
ALOGW("%s: there are %d bytes skipped", __func__, (int)len);
}
close(fd);
}
RpcAddress RpcAddress::unique() {
RpcAddress ret;
ReadRandomBytes((uint8_t*)ret.mRawAddr.get(), sizeof(RpcWireAddress));
LOG_RPC_DETAIL("Creating new address: %s", ret.toString().c_str());
return ret;
}
RpcAddress RpcAddress::fromRawEmbedded(const RpcWireAddress* raw) {
RpcAddress addr;
memcpy(addr.mRawAddr.get(), raw, sizeof(RpcWireAddress));
return addr;
}
const RpcWireAddress& RpcAddress::viewRawEmbedded() const {
return *mRawAddr.get();
}
bool RpcAddress::operator<(const RpcAddress& rhs) const {
return std::memcmp(mRawAddr.get(), rhs.mRawAddr.get(), sizeof(RpcWireAddress)) < 0;
}
std::string RpcAddress::toString() const {
return hexString(mRawAddr.get(), sizeof(RpcWireAddress));
}
status_t RpcAddress::writeToParcel(Parcel* parcel) const {
return parcel->write(mRawAddr.get(), sizeof(RpcWireAddress));
}
status_t RpcAddress::readFromParcel(const Parcel& parcel) {
return parcel.read(mRawAddr.get(), sizeof(RpcWireAddress));
}
RpcAddress::~RpcAddress() {}
RpcAddress::RpcAddress() : mRawAddr(std::make_shared<RpcWireAddress>()) {}
} // namespace android
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