版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/oHanTanYanYing/article/details/81742248
代码修改的下面博客的内容，如需要详细了解请移步
https://blog.csdn.net/xiaoquantouer/article/details/58001960
服务器：
#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib,"ws2_32.lib")
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[1024];
while (true)
{
printf("等待连接...\n");
sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
if (sClient == INVALID_SOCKET)
{
printf("accept error !");
continue;
}
//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 <winsock2.h>
#include <WS2tcpip.h>
#include<stdio.h>
#include<iostream>
#include<cstring>
using namespace std;
#pragma comment(lib, "ws2_32.lib")
int main()
{
WORD sockVersion = MAKEWORD(2, 2);
WSADATA data;
if (WSAStartup(sockVersion, &data) != 0)
{
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);
while (true)
{
SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sclient == INVALID_SOCKET)
{
printf("invalid socket!");
return 0;
}
if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
{ //连接失败
printf("connect error !");
closesocket(sclient);
return 0;
}
send(sclient, "asd", strlen("asd"), 0);
char recData[255];
int ret = recv(sclient, recData, 255, 0);
if (ret > 0) {
recData[ret] = 0x00;
printf(recData);
}
closesocket(sclient);
}
WSACleanup();
return 0;
}如果要发送整个文件，则可以按照如下的方式发送：
服务器：
#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib,"ws2_32.lib")
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)//注意前面加两个点以避免跟std的bind想冲突
{
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[1024];
char sendData[7680];
while (true)
{
printf("等待连接...\n");
sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
if (sClient == INVALID_SOCKET)
{
printf("accept error !");
continue;
}
//接收数据
int ret = recv(sClient, revData, 255, 0);//可处理
//发送文件
FILE *pf;
fopen_s(&pf, "demo.jpg", "rb");
while (1)
{
int readlen = fread(sendData, 1, 7680, pf);
if (readlen > 0)
{
send(sClient, sendData, readlen, 0);
}
else
{
Sleep(100);//解决粘包问题
send(sClient, "end", strlen("end"), 0);
break;
}
}
fclose(pf);
}
closesocket(sClient);
closesocket(slisten);
WSACleanup();
return 0;
}客户端：
#include <winsock2.h>
#include <WS2tcpip.h>
#include<stdio.h>
#include<iostream>
#include<cstring>
using namespace std;
#pragma comment(lib, "ws2_32.lib")
int main()
{
WORD sockVersion = MAKEWORD(2, 2);
WSADATA data;
if (WSAStartup(sockVersion, &data) != 0)
{
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);
char recData[7680];
while (true)
{
SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sclient == INVALID_SOCKET)
{
printf("invalid socket!");
return 0;
}
if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
{ //连接失败
printf("connect error !");
closesocket(sclient);
return 0;
}
send(sclient, "asd", strlen("asd"), 0);
FILE *pf;
fopen_s(&pf, "rec.jpg", "wb");
while (1)
{
int ret = recv(sclient, recData, 7680, 0);
if (ret==3)
{
if (recData[0] == 'e'&&recData[1] == 'n'&&recData[2] == 'd')
{
printf("接收完成!");
break;
}
}
if (ret>0)
{
fwrite(recData, 1, ret, pf);
}
}
fclose(pf);
closesocket(sclient);
}
WSACleanup();
return 0;
}