118 lines
3.9 KiB
C++
118 lines
3.9 KiB
C++
/*
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* Copyright (C) 2021 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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#define LOG_TAG "RpcRawTransport"
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#include <log/log.h>
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#include <poll.h>
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#include <stddef.h>
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#include <binder/RpcTransportRaw.h>
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#include "FdTrigger.h"
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#include "OS.h"
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#include "RpcState.h"
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#include "RpcTransportUtils.h"
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namespace android {
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namespace {
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// RpcTransport with TLS disabled.
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class RpcTransportRaw : public RpcTransport {
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public:
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explicit RpcTransportRaw(android::RpcTransportFd socket) : mSocket(std::move(socket)) {}
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status_t pollRead(void) override {
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uint8_t buf;
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ssize_t ret = TEMP_FAILURE_RETRY(
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::recv(mSocket.fd.get(), &buf, sizeof(buf), MSG_PEEK | MSG_DONTWAIT));
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if (ret < 0) {
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int savedErrno = errno;
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if (savedErrno == EAGAIN || savedErrno == EWOULDBLOCK) {
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return WOULD_BLOCK;
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}
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LOG_RPC_DETAIL("RpcTransport poll(): %s", strerror(savedErrno));
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return -savedErrno;
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} else if (ret == 0) {
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return DEAD_OBJECT;
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}
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return OK;
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}
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status_t interruptableWriteFully(
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FdTrigger* fdTrigger, iovec* iovs, int niovs,
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const std::optional<android::base::function_ref<status_t()>>& altPoll,
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const std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds)
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override {
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bool sentFds = false;
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auto send = [&](iovec* iovs, int niovs) -> ssize_t {
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ssize_t ret =
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sendMessageOnSocket(mSocket, iovs, niovs, sentFds ? nullptr : ancillaryFds);
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sentFds |= ret > 0;
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return ret;
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};
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return interruptableReadOrWrite(mSocket, fdTrigger, iovs, niovs, send, "sendmsg", POLLOUT,
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altPoll);
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}
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status_t interruptableReadFully(
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FdTrigger* fdTrigger, iovec* iovs, int niovs,
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const std::optional<android::base::function_ref<status_t()>>& altPoll,
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std::vector<std::variant<base::unique_fd, base::borrowed_fd>>* ancillaryFds) override {
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auto recv = [&](iovec* iovs, int niovs) -> ssize_t {
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return receiveMessageFromSocket(mSocket, iovs, niovs, ancillaryFds);
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};
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return interruptableReadOrWrite(mSocket, fdTrigger, iovs, niovs, recv, "recvmsg", POLLIN,
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altPoll);
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}
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virtual bool isWaiting() { return mSocket.isInPollingState(); }
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private:
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android::RpcTransportFd mSocket;
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};
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// RpcTransportCtx with TLS disabled.
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class RpcTransportCtxRaw : public RpcTransportCtx {
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public:
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std::unique_ptr<RpcTransport> newTransport(android::RpcTransportFd socket, FdTrigger*) const {
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return std::make_unique<RpcTransportRaw>(std::move(socket));
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}
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std::vector<uint8_t> getCertificate(RpcCertificateFormat) const override { return {}; }
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};
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} // namespace
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std::unique_ptr<RpcTransportCtx> RpcTransportCtxFactoryRaw::newServerCtx() const {
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return std::make_unique<RpcTransportCtxRaw>();
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}
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std::unique_ptr<RpcTransportCtx> RpcTransportCtxFactoryRaw::newClientCtx() const {
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return std::make_unique<RpcTransportCtxRaw>();
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}
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const char *RpcTransportCtxFactoryRaw::toCString() const {
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return "raw";
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}
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std::unique_ptr<RpcTransportCtxFactory> RpcTransportCtxFactoryRaw::make() {
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return std::unique_ptr<RpcTransportCtxFactoryRaw>(new RpcTransportCtxFactoryRaw());
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}
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} // namespace android
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