实验要求
基于Windows平台,通过WinSocket实现客户端通信。客户端输入一串字符串,由服务器返回该字符串长度,在客户端上显示该长度。
Code
server.c
#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib,"ws2_32.lib")
typedef struct sockaddr_in sockaddr_in;
typedef struct sockaddr sockaddr;
int main(int argc, char* argv[])
{
//初始化WSA
WORD sockVersion = MAKEWORD(2,2);
WSADATA wsaData;
if(WSAStartup(sockVersion, &wsaData)!=0)
{
return 0;
}
//创建套接字
SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(slisten == INVALID_SOCKET)
{
printf("socket error !");
return 0;
}
//绑定IP和端口
sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(8888);
sin.sin_addr.S_un.S_addr = INADDR_ANY;
if(bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
{
printf("bind error !");
}
//开始监听
if(listen(slisten, 5) == SOCKET_ERROR)
{
printf("listen error !");
return 0;
}
//循环接收数据
SOCKET sClient;
sockaddr_in remoteAddr;
int nAddrlen = sizeof(remoteAddr);
char revData[255];
while (1)
{
printf("等待连接...
");
sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
if(sClient == INVALID_SOCKET)
{
printf("accept error !");
continue;
}
printf("接受到一个连接:%s
", inet_ntoa(remoteAddr.sin_addr));
//接收数据
int ret = recv(sClient, revData, 255, 0);
if(ret > 0)
{
revData[ret] = 0x00;
printf(revData);
}
//发送数据
char sendData[256];
sprintf(sendData,"%d",ret);
//const char * sendData = "你好,TCP客户端!
";
send(sClient, sendData, strlen(sendData), 0);
closesocket(sClient);
}
closesocket(slisten);
WSACleanup();
return 0;
}
client.c
#include <WINSOCK2.H>
#include <STDIO.H>
#pragma comment(lib,"ws2_32.lib")
typedef struct sockaddr_in sockaddr_in;
typedef struct sockaddr sockaddr;
int main(int argc, char* argv[])
{
WORD sockVersion = MAKEWORD(2,2);
WSADATA data;
if(WSAStartup(sockVersion, &data) != 0)
{
return 0;
}
SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sclient == INVALID_SOCKET)
{
printf("invalid socket !");
return 0;
}
sockaddr_in serAddr;
serAddr.sin_family = AF_INET;
serAddr.sin_port = htons(8888);
serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
{
printf("connect error !");
closesocket(sclient);
return 0;
}
char sendData[256];
//const char * sendData = "你好,TCP服务端,我是客户端!
";
scanf("%s",sendData);
send(sclient, sendData, strlen(sendData), 0);
char recData[255];
int ret = recv(sclient, recData, 255, 0);
if(ret > 0)
{
recData[ret] = 0x00;
printf(recData);
}
closesocket(sclient);
WSACleanup();
return 0;
}
程序说明
编译:
gcc -fexec-charset=GBK prog.c -o prog -lws2_32
gcc -fexec-charset=GBK server.c -o server -lws2_32
-fexec-charset=GBK 防止中文乱码
-lws2_32 添加winsock的DLL