C++网络通信 Socket
目录
服务端：
#include <iostream>
#include <stdio.h>
#include <winsock2.h>
#include <Ws2tcpip.h>
#pragma comment(lib,"ws2_32.lib")
#define _WINSOCK_DEPRECATED_NO_WARNINGS 1
using namespace std;
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 (true)
{
printf("等待连接...\n");
sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
if (sClient == INVALID_SOCKET)
{
printf("accept error !");
continue;
}
char ip[100];
if (inet_ntop(AF_INET, &remoteAddr.sin_addr.S_un.S_addr, ip, 100) == NULL)
{
cout << "error" << endl;
return -1;
}
cout << ip << endl; //宽字符记得用宽字符的方式进行输出
//接收数据
int ret = recv(sClient, revData, 255, 0);
if (ret > 0)
{
revData[ret] = 0x00;
printf(revData);
}
//发送数据
const char * sendData = "你好，TCP客户端！\n";
send(sClient, sendData, strlen(sendData), 0);
closesocket(sClient);
}
closesocket(slisten);
WSACleanup();
return 0;
}
客户端：
#include<iostream>
#include<WINSOCK2.H>
#include<STDIO.H>
#include<cstring>
#include <Ws2tcpip.h>
#pragma comment(lib, "ws2_32.lib")
#define _WINSOCK_DEPRECATED_NO_WARNINGS 1
using namespace std;
int main()
{
WORD sockVersion = MAKEWORD(2, 2);
WSADATA data;
if (WSAStartup(sockVersion, &data) != 0)
{
return 0;
}
while (true) {
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);
inet_pton(AF_INET, "127.0.0.1", &serAddr.sin_addr.S_un.S_addr);
if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
{ //连接失败
printf("connect error !");
closesocket(sclient);
return 0;
}
char data[1024];
cin >> data;
const char * sendData;
sendData = data; //string转const char*
//char * sendData = "你好，TCP服务端，我是客户端\n";
send(sclient, sendData, strlen(sendData), 0);
//send()用来将数据由指定的socket传给对方主机
//int send(int s, const void * msg, int len, unsigned int flags)
//s为已建立好连接的socket，msg指向数据内容，len则为数据长度，参数flags一般设0
//成功则返回实际传送出去的字符数，失败返回-1，错误原因存于error
char recData[255];
int ret = recv(sclient, recData, 255, 0);
if (ret > 0) {
recData[ret] = 0x00;
printf(recData);
}
closesocket(sclient);
}
WSACleanup();
return 0;
}
客户端第二种写法：不使用inet_pton函数
#include<iostream>
#define _WINSOCK_DEPRECATED_NO_WARNINGS 1
#include<WINSOCK2.H>
#include<STDIO.H>
#include<cstring>
#pragma comment(lib, "ws2_32.lib")
using namespace std;
int main()
{
WORD sockVersion = MAKEWORD(2, 2);
WSADATA data;
if (WSAStartup(sockVersion, &data) != 0)
{
return 0;
}
while (true) {
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)
{ //连接失败
printf("connect error !");
closesocket(sclient);
return 0;
}
char data[1024];
cin >> data;
const char * sendData;
sendData = data; //string转const char*
//char * sendData = "你好，TCP服务端，我是客户端\n";
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;
}
文章来源: wanghao.blog.csdn.net，作者：AI浩，版权归原作者所有，如需转载，请联系作者。
原文链接：wanghao.blog.csdn.net/article/details/108062794
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