udp.txt

udp通信协议 软件设计用 可恶的20字

void main()
{
SOCKET socket1;

InitWinsock();
struct sockaddr_in local;
struct sockaddr_in from;
int fromlen =sizeof(from);
local.sin_family=AF_INET;
local.sin_port=htons(1000); 
local.sin_addr.s_addr=INADDR_ANY; 

socket1=socket(AF_INET,SOCK_DGRAM,0);
bind(socket1,(struct sockaddr*)&local,sizeof local);
while (1)
{
char buffer[1024]="\0";
printf("waiting for message from others-------------\n");
if (recvfrom(socket1,buffer,sizeof buffer,0,(struct sockaddr*)&from,&fromlen)!=SOCKET_ERROR)
{
printf("Received datagram from %s--%s\n",inet_ntoa(from.sin_addr),buffer);
sendto(socket1,buffer,sizeof buffer,0,(struct sockaddr*)&from,fromlen);

}
Sleep(500);
}
closesocket(socket1)；
}

void main()
{
　 SOCKET socket1;

　 InitWinsock();
　 struct sockaddr_in server;
　 int len =sizeof(server);
　 server.sin_family=AF_INET;
　 server.sin_port=htons(1000); ///server的监听端口
　 server.sin_addr.s_addr=inet_addr("168.168.0.10"); ///server的地址 

　 socket1=socket(AF_INET,SOCK_DGRAM,0);
　 while (1)
　 {
　　 char buffer[1024]="\0";
　　 printf("input message\n");
　　 scanf("%s",buffer);
　　 if (strcmp(buffer,"bye")==0)
　　　 break;
　　　 if (sendto(socket1,buffer,sizeof buffer,0,(struct sockaddr*)&server,len)!=SOCKET_ERROR)
　　　 { 
　　　　 if (recvfrom(socket1,buffer,sizeof buffer,0,(struct sockaddr*)&server,&len) != SOCKET_ERROR)
　　　　　 printf("rece from server:%s\n",buffer);
　　　 } 
　 }
　 closesocket(socket1);
}