windows和linux中UDP编程

#include <iostream>
#include <windows.h>
#include <stdio.h>
#include <string.h>
#define IP "127.0.0.1"
#define PORT 8888
#pragma comment(lib,"ws2_32.lib")

using namespace std;
char* GetTime();
int main()
{
WSADATA wsaData;
WORD Ret;
if ((Ret = WSAStartup(MAKEWORD(2, 2), &wsaData) != 0))
{
cout << "WSAStartup() Error Whit:" << Ret << endl;
WSACleanup();
return -1;
}//统一版本类型。

SOCKET sockSer, sockCli;
sockSer = socket(AF_INET,SOCK_DGRAM,0);
SOCKADDR_IN addrSer, addrCli;

memset(&addrSer,0,sizeof(addrSer));
memset(&addrCli,0,sizeof(addrCli));

addrSer.sin_family = AF_INET;
addrSer.sin_port = htons(PORT);
addrSer.sin_addr.S_un.S_addr = inet_addr(IP);

int len = sizeof(SOCKADDR);
bind(sockSer,(SOCKADDR*)&addrSer,len);

char serbuff[255];

//不需要监听连接。

while (1)
{
recvfrom(sockSer,serbuff,sizeof(serbuff),0,(SOCKADDR*)&addrCli,&len);
cout << serbuff << endl;
sendto(sockSer, GetTime(), 30, 0, (SOCKADDR*)&addrCli, len);
}
WSACleanup();
closesocket(sockSer);
closesocket(sockCli);
return 0;
}
char* GetTime()
{
char buff[255];
SYSTEMTIME sys;
GetLocalTime(&sys);//初始化本地时间。
sprintf(buff,"%d:%d:%d:%d:%d:%d",sys.wYear,sys.wMonth,sys.wDay,sys.wHour,sys.wMinute,sys.wSecond);
return buff;
}

#include <iostream>
#include <windows.h>
#define PORT 8888
#define IP "127.0.0.1"
using namespace std;

#pragma comment(lib,"ws2_32.lib")
int main()
{
DWORD Ret;
WSAData wsaData;
if ((Ret = WSAStartup(MAKEWORD(2, 2), &wsaData)) != 0)
{
cout <<"WSAStartup() Error Wiht : "<< Ret << endl;
WSACleanup();
return -1;
}

SOCKET sockCli = socket(AF_INET,SOCK_DGRAM,0);
SOCKADDR_IN addrSer;
addrSer.sin_family = AF_INET;
addrSer.sin_port = htons(PORT);
addrSer.sin_addr.S_un.S_addr = inet_addr(IP);

int len = sizeof(addrSer);
const char timebuff[] = "times";
char serbuff[255];

connect(sockCli,(SOCKADDR*)&addrSer,len);

while (1)
{
sendto(sockCli,timebuff,strlen(timebuff)+1,0,(SOCKADDR*)&addrSer,len);
recvfrom(sockCli,serbuff,sizeof(serbuff),0,(SOCKADDR*)&addrSer,&len);
cout <<timebuff<<serbuff << endl;
Sleep(2000);
}
return 0;
}

#include <iostream>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <string.h>
#define PORT 8888
#define IP "127.0.0.1"
using namespace std;
int main()
{
int sockSer = socket(AF_INET,SOCK_DGRAM,0);
sockaddr_in addrSer,addrCli;
addrSer.sin_family = AF_INET;
addrSer.sin_port = htons(PORT);
addrSer.sin_addr.s_addr = inet_addr(IP);

socklen_t len=sizeof(sockaddr);
bind(sockSer,(sockaddr*)&addrSer,len);
char serbuff[255]="!Hello !I am server!";
char clibuff[255];
while(1)
{
recvfrom(sockSer,clibuff,sizeof(clibuff),0,(sockaddr*)&addrSer,&len);
cout<<"CLient Say:"<<clibuff<<endl;
sendto(sockSer,serbuff,strlen(serbuff)+1,0,(sockaddr*)&addrSer,len);
}
return 0;
}

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 8888
#define IP "127.0.0.1"

using namespace std;
int main()
{
int sockCli = socket(AF_INET,SOCK_DGRAM,0);
sockaddr_in addrSer;
addrSer.sin_family = AF_INET;
addrSer.sin_port = htons(PORT);
addrSer.sin_addr.s_addr = inet_addr(IP);

socklen_t len = sizeof(sockaddr);
char clibuff[]="hello! I am client!";
char serbuff[255];
while(1)
{
sendto(sockCli,clibuff,strlen(clibuff)+1,0,(sockaddr*)&addrSer,len);
recvfrom(sockCli,serbuff,sizeof(serbuff),0,(sockaddr*)&addrSer,&len);
cout<<"Server Say:>"<<serbuff<<endl;
sleep(2);
}
return 0;
}