#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
int main(){
 int sockfd;
 char buffer[0x400];
 char *hello="Hi";
 struct sockaddr_in servaddr;
 memset(&servaddr,0,sizeof(servaddr));
 servaddr.sin_family=AF_INET;
 servaddr.sin_port=htons(0x2357);
 servaddr.sin_addr.s_addr=INADDR_ANY;
 int len;
 sendto(sockfd,(const char *)hello,strlen(hello),
  MSG_CONFIRM,(const struct sockaddr *)&servaddr,
  sizeof(servaddr));
 printf("sent\n");	
 int n=recvfrom(sockfd,(char *)buffer,0x400,
  MSG_WAITALL,(struct sockaddr *)&servaddr,&len);
 buffer[n]='\0';
 printf("srv %s\n",buffer);
 close(sockfd);
return 0;}