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/*
* Copyright (C) 2017 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 "common/libs/utils/tcp_socket.h"
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <cerrno>
#include <cstring>
#include <memory>
#include <ostream>
#include <string>
#include <android-base/logging.h>
namespace cuttlefish {
ClientSocket::ClientSocket(int port)
: fd_(SharedFD::SocketLocalClient(port, SOCK_STREAM)) {}
Message ClientSocket::RecvAny(std::size_t length) {
Message buf(length);
auto read_count = fd_->Read(buf.data(), buf.size());
if (read_count < 0) {
read_count = 0;
}
buf.resize(read_count);
return buf;
}
bool ClientSocket::closed() const {
std::lock_guard<std::mutex> guard(closed_lock_);
return other_side_closed_;
}
Message ClientSocket::Recv(std::size_t length) {
Message buf(length);
ssize_t total_read = 0;
while (total_read < static_cast<ssize_t>(length)) {
auto just_read = fd_->Read(&buf[total_read], buf.size() - total_read);
if (just_read <= 0) {
if (just_read < 0) {
LOG(ERROR) << "read() error: " << strerror(errno);
}
{
std::lock_guard<std::mutex> guard(closed_lock_);
other_side_closed_ = true;
}
return Message{};
}
total_read += just_read;
}
CHECK(total_read == static_cast<ssize_t>(length));
return buf;
}
ssize_t ClientSocket::SendNoSignal(const uint8_t* data, std::size_t size) {
std::lock_guard<std::mutex> lock(send_lock_);
ssize_t written{};
while (written < static_cast<ssize_t>(size)) {
if (!fd_->IsOpen()) {
LOG(ERROR) << "fd_ is closed";
}
auto just_written = fd_->Send(data + written, size - written, MSG_NOSIGNAL);
if (just_written <= 0) {
LOG(INFO) << "Couldn't write to client: " << strerror(errno);
{
std::lock_guard<std::mutex> guard(closed_lock_);
other_side_closed_ = true;
}
return just_written;
}
written += just_written;
}
return written;
}
ssize_t ClientSocket::SendNoSignal(const Message& message) {
return SendNoSignal(&message[0], message.size());
}
ServerSocket::ServerSocket(int port)
: fd_{SharedFD::SocketLocalServer(port, SOCK_STREAM)} {
if (!fd_->IsOpen()) {
LOG(FATAL) << "Couldn't open streaming server on port " << port;
}
}
ClientSocket ServerSocket::Accept() {
SharedFD client = SharedFD::Accept(*fd_);
if (!client->IsOpen()) {
LOG(FATAL) << "Error attempting to accept: " << strerror(errno);
}
return ClientSocket{client};
}
void AppendInNetworkByteOrder(Message* msg, const std::uint8_t b) {
msg->push_back(b);
}
void AppendInNetworkByteOrder(Message* msg, const std::uint16_t s) {
const std::uint16_t n = htons(s);
auto p = reinterpret_cast<const std::uint8_t*>(&n);
msg->insert(msg->end(), p, p + sizeof n);
}
void AppendInNetworkByteOrder(Message* msg, const std::uint32_t w) {
const std::uint32_t n = htonl(w);
auto p = reinterpret_cast<const std::uint8_t*>(&n);
msg->insert(msg->end(), p, p + sizeof n);
}
void AppendInNetworkByteOrder(Message* msg, const std::int32_t w) {
std::uint32_t u{};
std::memcpy(&u, &w, sizeof u);
AppendInNetworkByteOrder(msg, u);
}
void AppendInNetworkByteOrder(Message* msg, const std::string& str) {
msg->insert(msg->end(), str.begin(), str.end());
}
}
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