实验目的:
掌握Winsock2.0套接字编程技术的基本方法。
实验要求:
运用TCP/IP Winsock2.0套接字编程技术,使用VC编写一个面向连接通信的服务端程序与客户端程序,服务器先与端口3000绑定,
然后等待客户连接,连接成功后就可与客户端互相收、发信息。交互中,通信任一方只要发送 bye, 通信过程便自动结束。
服务端:
#include <conio.h>
#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib, "Ws2_32.lib")
int main(int, char **)
{
struct sockaddr addr;
int recvLen, errCode;
char msg[255] = {0};
SOCKET sock, sersock;
WORD wVersionRequested;
WSADATA wsaData;
LPSTR messageBuffer = NULL;
SetConsoleTitle("服务端");
wVersionRequested = MAKEWORD(2, 0);
errCode = WSAStartup(wVersionRequested, &wsaData);
if (errCode)
{
printf("没有Windows Socket动态库!\n");
return WSAGetLastError();
}
if (LOBYTE(wsaData.wVersion) != 2 || //不是Winsock 2.0
HIBYTE(wsaData.wVersion) != 0)
{
printf("需要Windows Socket 2!\n");
WSACleanup();
return WSAGetLastError();
}
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == INVALID_SOCKET)
{
printf("不能创建Socket!\n");
getch();
WSACleanup();
return 0;
}
((sockaddr_in *)&addr)->sin_family = AF_INET;
((sockaddr_in *)&addr)->sin_port = htons(3000);
((sockaddr_in *)&addr)->sin_addr.s_addr = inet_addr("127.0.0.1");
bind(sock, &addr, sizeof(addr));
listen(sock, 1);
printf("等待客户连接!\n");
recvLen = sizeof(addr);
sersock = accept(sock, &addr, &recvLen);
if (sersock == INVALID_SOCKET)
{
errCode = WSAGetLastError();
size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER
| FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, errCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR)&messageBuffer, 0, NULL);
printf("%s\n", messageBuffer);
free(messageBuffer);
getch();
closesocket(sock);
WSACleanup();
return 0;
}
printf("有客户连接!\n输入bye通信结束\n");
do
{
printf("\n等待客户端输入信息......");
recvLen = recv(sersock, msg, 200, 0);
printf("\n客户端:%s", msg);
if (!strcmp(msg, "bye"))
break;
printf("\n服务器:");
gets(msg);
send(sersock, msg, strlen(msg) + 1, 0);
} while (strcmp(msg, "bye"));
closesocket(sersock);
closesocket(sock);
printf("\n\n会话结束,按任一键返回\n");
getch();
WSACleanup();
return 0;
}
客户端:
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#pragma comment(lib, "Ws2_32.lib")
int main(int, char **)
{
SOCKET sock;
struct sockaddr addr;
int errCode;
char msg[255] = {0};
WORD wVersionRequested;
WSADATA wsaData;
SetConsoleTitle("客户端");
wVersionRequested = MAKEWORD(2, 0);
errCode = WSAStartup(wVersionRequested, &wsaData);
if (errCode)
{
printf("没有Windows Socket动态库!\n");
return WSAGetLastError();
}
if (LOBYTE(wsaData.wVersion) != 2 ||
HIBYTE(wsaData.wVersion) != 0)
{
printf("需要Windows Socket 2!\n");
WSACleanup();
return WSAGetLastError();
}
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == INVALID_SOCKET)
{
printf("不能创建Socket!\n");
getch();
WSACleanup();
return WSAGetLastError();
}
((sockaddr_in *)&addr)->sin_family = AF_INET;
((sockaddr_in *)&addr)->sin_addr.s_addr = inet_addr("127.0.0.1");
((sockaddr_in *)&addr)->sin_port = htons(3000);
printf("与服务器连接...!\n");
errCode = connect(sock, (sockaddr *)&addr, sizeof(addr));
if (errCode == SOCKET_ERROR)
{
printf("连接失败!\n");
getch();
WSACleanup();
return 0;
}
printf("成功连接到服务器127.0.0.1!\n若输入bye则通信结束\n");
do
{
printf("\n\n客户端:");
gets(msg);
send(sock, msg, strlen(msg) + 1, 0);
if (!strcmp(msg, "bye")) break;
printf("等待服务器响应......\n");
recv(sock, msg, 200, 0);
printf("服务器:%s", msg);
} while (strcmp(msg, "bye"));
closesocket(sock);
printf("\n会话结束,按任一键返回\n");
getch();
WSACleanup();
return 0;
}
运行效果:
此为学校实验题目:word排版请用http://www.planetb.ca/syntax-highlight-word
Winsock2.0相关参考网站,拥有大量示例代码:https://www.tenouk.com/