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/*
* Copyright (c) 2021-2022 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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 "TCPServer.h"
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <cstdlib>
#include <stdexcept>
#include "aitt_internal.h"
#define BACKLOG 10 // Accept only 10 simultaneously connections by default
TCP::Server::Server(const std::string &host, unsigned short &port)
: handle(-1), addr(nullptr), addrlen(0)
{
int ret = 0;
do {
handle = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (handle < 0)
break;
addrlen = sizeof(sockaddr_in);
addr = static_cast<sockaddr *>(calloc(1, sizeof(sockaddr_in)));
if (!addr)
break;
sockaddr_in *inet_addr = reinterpret_cast<sockaddr_in *>(addr);
if (!inet_pton(AF_INET, host.c_str(), &inet_addr->sin_addr)) {
ret = EINVAL;
break;
}
inet_addr->sin_port = htons(port);
inet_addr->sin_family = AF_INET;
int on = 1;
ret = setsockopt(handle, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (ret < 0)
break;
ret = bind(handle, addr, addrlen);
if (ret < 0)
break;
if (!port) {
if (getsockname(handle, addr, &addrlen) < 0)
break;
port = ntohs(inet_addr->sin_port);
}
ret = listen(handle, BACKLOG);
if (ret < 0)
break;
return;
} while (0);
if (ret <= 0)
ret = errno;
free(addr);
if (handle >= 0 && close(handle) < 0)
ERR_CODE(errno, "close");
throw std::runtime_error(strerror(ret));
}
TCP::Server::~Server(void)
{
if (handle < 0)
return;
free(addr);
if (close(handle) < 0)
ERR_CODE(errno, "close");
}
std::unique_ptr<TCP> TCP::Server::AcceptPeer(void)
{
sockaddr *peerAddr;
socklen_t szAddr = sizeof(sockaddr_in);
int peerHandle;
peerAddr = static_cast<sockaddr *>(calloc(1, szAddr));
if (!peerAddr)
throw std::runtime_error(strerror(errno));
peerHandle = accept(handle, peerAddr, &szAddr);
if (peerHandle < 0) {
free(peerAddr);
throw std::runtime_error(strerror(errno));
}
return std::unique_ptr<TCP>(new TCP(peerHandle, peerAddr, szAddr));
}
int TCP::Server::GetHandle(void)
{
return handle;
}
unsigned short TCP::Server::GetPort(void)
{
sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
if (getsockname(handle, reinterpret_cast<sockaddr *>(&addr), &addrlen) < 0)
throw std::runtime_error(strerror(errno));
return ntohs(addr.sin_port);
}
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