tcp/ip UDP 服务器、客户端的连接 14.5.14

// SockClient.cpp : Defines the entry point for the console application.
//
// SockClient.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"
#include "conio.h"

//socket头文件
#include "winsock2.h"
//socket库的lib
#pragma comment(lib,"ws2_32.lib")

void TCPClient(){
SOCKET sockclient=socket(AF_INET,SOCK_STREAM,
IPPROTO_TCP);
//判断是不是成功
if(INVALID_SOCKET==sockclient){
return;
}
//连接到服务器
struct sockaddr_in addr={0};
addr.sin_family=AF_INET;
addr.sin_port=htons(5678);
addr.sin_addr.S_un.S_addr=inet_addr("192.168.1.243");
//连接服务器
int s= connect(sockclient,(struct sockaddr *)&addr,sizeof(addr));
if(s==0){
printf("已经连接到服务器\n");
}else{
printf("服务器断开\n");
}
//数据的收发
//向服务器发送数据
char szSend[100]="hello server";
send(sockclient,szSend,sizeof(szSend),0);
//接受服务器发送数据
char szText[100]={0};
recv(sockclient,szSend,100,0);
printf("%s\n",szSend);

getch();
//关闭SOCKET
closesocket(sockclient);
}

void UDPClient(){
//创建一个socket
SOCKET sockclient=socket(AF_INET,
SOCK_DGRAM,IPPROTO_UDP);
if(INVALID_SOCKET==sockclient){
printf("INVALID_SOCKET");
return;
}
struct sockaddr_in svraddr={0};
svraddr.sin_family=AF_INET;
svraddr.sin_port=htons(5679);
svraddr.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
//数据收发
char szSend[100]="Hello udp Server";
sendto(sockclient,szSend,100,0,
(struct sockaddr *)&svraddr,sizeof(svraddr));

getch();
//关闭SOCKET
closesocket(sockclient);

}
int main(int argc, char* argv[])
{
//初始化SOCKET库
WSADATA wsa={0};
WSAStartup(MAKEWORD(2,2),&wsa);
//TCPClient();
UDPClient();
return 0;
}

// SockClient.cpp : Defines the entry point for the console application.
//
// SockClient.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"
#include "conio.h"

//socket头文件
#include "winsock2.h"
//socket库的lib
#pragma comment(lib,"ws2_32.lib")

void TCPServer(){
printf("开始等待客户端连接\n");
//创建服务器的SOCKET
SOCKET scoksvr=socket (AF_INET,SOCK_STREAM,IPPROTO_TCP);
//绑定IP和端口
struct sockaddr_in svraddr={0};
svraddr.sin_family=AF_INET;
//端口号
svraddr.sin_port=htons(5678);
//绑定的IP 下面设置的是当前机子IP
svraddr.sin_addr.S_un.S_addr=htons(INADDR_ANY);
bind(scoksvr,(struct sockaddr*)&svraddr,sizeof(svraddr));
//侦听
listen(scoksvr,SOMAXCONN);

//等候客户端
struct sockaddr_in clientaddr={0};
int nLen=sizeof(clientaddr);
SOCKET sockclient=accept(scoksvr,
(struct sockaddr*)&clientaddr,&nLen);

//数据收发

char szText[100]={0};
recv(sockclient,szText,100,0);
printf("%s\n",szText);
char szSend[100]="hello client";
send(sockclient,szSend,sizeof(szSend),0);

//printf("客户端已连接\n");
getch();
//关闭SOCKET
closesocket(sockclient);
closesocket(scoksvr);

}

void UDPServer(){
printf("开始等待客户端连接\n");
SOCKET socksvr=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
if(INVALID_SOCKET==socksvr){
printf("INVALID_SOCKET\n");
}
//绑定
struct sockaddr_in svraddr={0};
svraddr.sin_family=AF_INET;
svraddr.sin_port=htons(5679);
//绑定本地的所有IP地址
svraddr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
bind(socksvr,(struct sockaddr*)&svraddr,sizeof(svraddr));
//UPD数据接收
char szRecv[100]={0};
struct sockaddr_in clientaddr={0};
int nLen=sizeof(clientaddr);
recvfrom(socksvr,szRecv,100,0,
(struct sockaddr*)&clientaddr,&nLen);

printf("%s\n",szRecv);

getch();

//关闭
closesocket(socksvr);
}
int main(int argc, char* argv[])
{
//初始化SOCKET库
WSADATA wsa={0};
WSAStartup(MAKEWORD(2,2),&wsa);
//服务器

//TCPServer();
UDPServer();
return 0;
}

// SockClient.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"
#include "conio.h"

//socket头文件
#include "winsock2.h"
//socket库的lib
#pragma comment(lib,"ws2_32.lib")

void TCPServer(){
printf("开始等待客户端连接\n");
//创建服务器的SOCKET
SOCKET scoksvr=socket (AF_INET,SOCK_STREAM,IPPROTO_TCP);
//绑定IP和端口
struct sockaddr_in svraddr={0};
svraddr.sin_family=AF_INET;
//端口号
svraddr.sin_port=htons(5678);
//绑定的IP 下面设置的是当前机子IP
svraddr.sin_addr.S_un.S_addr=htons(INADDR_ANY);
bind(scoksvr,(struct sockaddr*)&svraddr,sizeof(svraddr));
//侦听
listen(scoksvr,SOMAXCONN);

//等候客户端
struct sockaddr_in clientaddr={0};
int nLen=sizeof(clientaddr);
SOCKET sockclient=accept(scoksvr,
(struct sockaddr*)&clientaddr,&nLen);

//数据收发

char szText[100]={0};
recv(sockclient,szText,100,0);
printf("%s\n",szText);
char szSend[100]="hello client";
send(sockclient,szSend,sizeof(szSend),0);

//printf("客户端已连接\n");
getch();
//关闭SOCKET
closesocket(sockclient);
closesocket(scoksvr);

}

void UDPServer(){
printf("开始等待客户端连接\n");
SOCKET socksvr=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
if(INVALID_SOCKET==socksvr){
printf("INVALID_SOCKET\n");
}
//绑定
struct sockaddr_in svraddr={0};
svraddr.sin_family=AF_INET;
svraddr.sin_port=htons(5679);
//绑定本地的所有IP地址
svraddr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
bind(socksvr,(struct sockaddr*)&svraddr,sizeof(svraddr));
//UPD数据接收
char szRecv[100]={0};
struct sockaddr_in clientaddr={0};
int nLen=sizeof(clientaddr);
recvfrom(socksvr,szRecv,100,0,
(struct sockaddr*)&clientaddr,&nLen);

printf("%s\n",szRecv);

getch();

//关闭
closesocket(socksvr);
}
int main(int argc, char* argv[])
{
//初始化SOCKET库
WSADATA wsa={0};
WSAStartup(MAKEWORD(2,2),&wsa);
//服务器

//TCPServer();
UDPServer();
return 0;
}