winsock 編程例

server.cpp

#include <stdio.h>

#include <winsock.h>


#pragma comment(lib,"ws2_32")


#define PORT 1234 //使用的端口號
#define MAX_LINK 10 //最大連接數


void main()
{
SOCKET sockfd,new_fd;
struct sockaddr_in server_addr;
struct sockaddr_in client_addr;
WSADATA ws;
int sin_size = sizeof(struct sockaddr_in);
char buffer[255];
int num = 0;


WSAStartup(MAKEWORD(2,2),&ws);


//生成套接字
if((sockfd = socket(AF_INET,SOCK_STREAM,0)) == INVALID_SOCKET)
{
exit(0);
}
printf("socket\n");


//設置服務器地址結構體
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(PORT);
server_addr.sin_addr.S_un.S_addr = INADDR_ANY;

//綁定
if(bind(sockfd,(struct sockaddr*)&server_addr,sizeof(struct sockaddr)) == -1)
{
closesocket(sockfd);
exit(0);
}
printf("bind\n");

//監聽
if(listen(sockfd,MAX_LINK) == SOCKET_ERROR)
{
closesocket(sockfd);
exit(0);
}
printf("listen\n");


//生成收發套接字
if((new_fd = accept(sockfd,(struct sockaddr*)&client_addr,&sin_size)) == INVALID_SOCKET)
{
closesocket(sockfd);
exit(0);
}
printf("收到請求\n");


printf("客戶端IP:%s\n",inet_ntoa(client_addr.sin_addr));
printf("客戶端Port:%d\n",ntohs(client_addr.sin_port));


//接收
//getchar();
num = 0;
while(1)
{
num = recv(new_fd,buffer,255,0);
if(num)
{
buffer[num-1] = '\0';
printf("\n信息:%s\n",buffer);
}
num = 0;
}


closesocket(sockfd);
closesocket(new_fd);
return;

}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

client.cpp

#include <stdio.h>
#include <winsock.h>


#pragma comment(lib,"ws2_32")


#define PORT 1234


int main(int argc, char *argv[])
{
SOCKET sockfd;
struct sockaddr_in server_addr;
WSADATA ws;
char buffer[255];
int num = 0;


printf("argc:%d\n",argc);
for(int i=1;i<argc;i++)
printf("%s\n",argv[i]);


//檢查是否有IP地址參數
if(argc != 2)
{
return -1;
}
printf("argc is right\n");


WSAStartup(MAKEWORD(2,2),&ws);


//生成套接字
if((sockfd = socket(AF_INET,SOCK_STREAM,0)) == INVALID_SOCKET)
{
return -1;
}
printf("socket\n");


//設置套接字
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(PORT);
server_addr.sin_addr.S_un.S_addr = inet_addr(argv[1]);


//連接
if(connect(sockfd,(struct sockaddr *)&server_addr,sizeof(struct sockaddr)) == SOCKET_ERROR)
{
closesocket(sockfd);
return -1;
}
printf("connect\n");


//發送消息
buffer[0] = '\0';
while(strcmp(buffer,"end"))
{
gets(buffer);
num = send(sockfd,buffer,255,0);
}
closesocket(sockfd);
return 0;
}