服务器
1.初始化
WSAStartup(…)
2.创建Socket
s = Socket ( … )
3.绑定端口
ret = bind ( … )
4.监听
ret = listen ( … )
5.接收客户端的连接请求
s_new = accept ( … ) // 三次握手发生在这个过程
6.收发数据
ret = recv ( … )
// 阻塞模式, 内存不够存放发送的信息时,则阻塞send()
// 非阻塞 , 视缓冲空间大小而发送相应大的数据,不阻塞send()
ret = send ( … )
7.关闭连接
#include
#pragma warning(disable:4996)
#pragma comment(lib,"ws2_32.lib")
#include
int main(int argc, char* argv[])
{
//请求版本号
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
if (HIBYTE(wsaData.wVersion) != 2 || LOBYTE(wsaData.wVersion) != 2)
{
printf("请求版本失败!");
return -1;
}
//创建socket
SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
//创建协议地址族
SOCKADDR_IN addr = { 0 };
addr.sin_family = AF_INET;
addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
addr.sin_port = htons(10086);
//绑定
int r = bind(serverSocket, (sockaddr*)&addr, sizeof addr);
//监听
r = listen(serverSocket, 10);
//接受客户端连接
SOCKADDR_IN cAddr = { 0 };
int size = sizeof cAddr;
SOCKET clientSocket = accept(serverSocket, (sockaddr*)&cAddr, &size);
printf("init ok!\n");
//通信
char buf[256];
while (1)
{
memset(buf, 0, 256);
r = recv(clientSocket, buf, 255, NULL);
if (r > 0)
{
printf("来自%s的数据:%s\n", inet_ntoa(cAddr.sin_addr), buf);
}
}
//断开连接
closesocket(clientSocket);
//清楚协议信息
WSACleanup();
return 0;
}
客户端
与服务器的区别在于不需要绑定端口
1.初始化
WSAStartup(…)
2.创建Socket
s = Socket ( … )
3.连接服务器
connect(…)
4.收发数据
ret = recv ( … )
// 阻塞模式, 内存不够存放发送的信息时,则阻塞send()
// 非阻塞 , 视缓冲空间大小而发送相应大的数据,不阻塞send()
ret = send ( … )
5.关闭连接
#include
#include
#include
#include
#include
#pragma warning(disable:4996)
#pragma comment(lib,"ws2_32.lib")
#include
int main(int argc, char* argv[])
{
//请求版本号
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
if (HIBYTE(wsaData.wVersion) != 2 || LOBYTE(wsaData.wVersion) != 2)
{
printf("请求版本失败!");
return -1;
}
//创建socket
SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
//创建协议地址族
SOCKADDR_IN addr = { 0 };
addr.sin_family = AF_INET;
addr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
addr.sin_port = htons(10086);
//连接
int r = connect(clientSocket, (sockaddr*)&addr, sizeof addr);
//通信
char buf[256];
while (1)
{
printf("请输入发送内容: ");
scanf("%s", buf);
r = send(clientSocket, buf, strlen(buf), NULL);
if (r > 0)
{
printf("发送%d字节数据成功\n", r);
}
}
}