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91 lines
2.5 KiB
91 lines
2.5 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <binder/RpcAddress.h>
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#include <binder/Parcel.h>
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#include "Debug.h"
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#include "RpcState.h"
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#include "RpcWireFormat.h"
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namespace android {
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RpcAddress RpcAddress::zero() {
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return RpcAddress();
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}
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bool RpcAddress::isZero() const {
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RpcWireAddress ZERO{0};
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return memcmp(mRawAddr.get(), &ZERO, sizeof(RpcWireAddress)) == 0;
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}
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static void ReadRandomBytes(uint8_t* buf, size_t len) {
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int fd = TEMP_FAILURE_RETRY(open("/dev/urandom", O_RDONLY | O_CLOEXEC | O_NOFOLLOW));
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if (fd == -1) {
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ALOGE("%s: cannot read /dev/urandom", __func__);
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return;
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}
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size_t n;
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while ((n = TEMP_FAILURE_RETRY(read(fd, buf, len))) > 0) {
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len -= n;
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buf += n;
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}
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if (len > 0) {
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ALOGW("%s: there are %d bytes skipped", __func__, (int)len);
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}
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close(fd);
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}
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RpcAddress RpcAddress::unique() {
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RpcAddress ret;
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ReadRandomBytes((uint8_t*)ret.mRawAddr.get(), sizeof(RpcWireAddress));
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LOG_RPC_DETAIL("Creating new address: %s", ret.toString().c_str());
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return ret;
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}
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RpcAddress RpcAddress::fromRawEmbedded(const RpcWireAddress* raw) {
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RpcAddress addr;
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memcpy(addr.mRawAddr.get(), raw, sizeof(RpcWireAddress));
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return addr;
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}
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const RpcWireAddress& RpcAddress::viewRawEmbedded() const {
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return *mRawAddr.get();
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}
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bool RpcAddress::operator<(const RpcAddress& rhs) const {
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return std::memcmp(mRawAddr.get(), rhs.mRawAddr.get(), sizeof(RpcWireAddress)) < 0;
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}
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std::string RpcAddress::toString() const {
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return hexString(mRawAddr.get(), sizeof(RpcWireAddress));
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}
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status_t RpcAddress::writeToParcel(Parcel* parcel) const {
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return parcel->write(mRawAddr.get(), sizeof(RpcWireAddress));
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}
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status_t RpcAddress::readFromParcel(const Parcel& parcel) {
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return parcel.read(mRawAddr.get(), sizeof(RpcWireAddress));
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}
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RpcAddress::~RpcAddress() {}
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RpcAddress::RpcAddress() : mRawAddr(std::make_shared<RpcWireAddress>()) {}
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} // namespace android
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