以下は、TCP/IPサーバアプリケーションのための完全なソースコードです。
#define _WIN32_WINNT 0x0501
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdlib.h>
#include <stdio.h>
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "27015"
int main(void)
{
WSADATA wsaData;
SOCKET ListenSocket = INVALID_SOCKET,
ClientSocket = INVALID_SOCKET;
struct addrinfo *result = NULL,
hints;
char recvbuf[DEFAULT_BUFLEN];
char sendbuf[DEFAULT_BUFLEN];
int iResult,
recvbuflen = DEFAULT_BUFLEN,
sendbuflen = DEFAULT_BUFLEN;
iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
if (iResult != 0)
{
printf("WSAStartup failed: %d\n", iResult);
return 1;
}
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
if (iResult != 0)
{
printf("getaddrinfo failed: %d\n", iResult);
WSACleanup();
return 1;
}
ListenSocket = socket(result->ai_family, result->ai_socktype
, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET)
{
printf("socket failed: %ld\n", WSAGetLastError());
freeaddrinfo(result);
WSACleanup();
return 1;
}
iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR)
{
printf("bind failed: %d\n", WSAGetLastError());
freeaddrinfo(result);
closesocket(ListenSocket);
WSACleanup();
return 1;
}
freeaddrinfo(result);
iResult = listen(ListenSocket, SOMAXCONN);
if (iResult == SOCKET_ERROR)
{
printf("listen failed: %d\n", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}
ClientSocket = accept(ListenSocket, NULL, NULL);
if (ClientSocket == INVALID_SOCKET)
{
printf("accept failed: %d\n", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}
closesocket(ListenSocket);
do
{
ZeroMemory(recvbuf, recvbuflen);
iResult = recv(ClientSocket, recvbuf, recvbuflen, 0);
if (0 < iResult)
{
printf("Bytes received: %d\n", iResult);
printf("received data: [%s]\n", recvbuf);
ZeroMemory(sendbuf, sendbuflen);
memcpy(sendbuf, recvbuf, iResult);
}
else if (iResult == 0)
{
printf("Connection closing...\n");
}
else
{
printf("recv failed: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
} while (0 < iResult);
printf("send data: [%s]\n", sendbuf);
iResult = send(ClientSocket, sendbuf, (int)strlen(sendbuf), 0);
if (iResult == SOCKET_ERROR)
{
printf("send failed: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
printf("Bytes Sent: %ld\n", iResult);
iResult = shutdown(ClientSocket, SD_SEND);
if (iResult == SOCKET_ERROR)
{
printf("shutdown failed: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
closesocket(ClientSocket);
WSACleanup();
return 0;
}
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