/*UDP-echoサーバー

2009.11.5  Haruka Fukai*/

#include <stdio.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char *argv[]){
  struct addrinfo hint={AI_PASSIVE,AF_INET6,SOCK_DGRAM,0,0,NULL,NULL,NULL};  
  int sock;
  socklen_t peerlen;
  struct addrinfo *ai,*res;
  struct sockaddr_in6 peer;
  int ret;

  ret  = getaddrinfo(NULL,"8115",&hint,&res);
  ai = res;

  sock=socket(ai->ai_family,ai->ai_socktype,ai->ai_protocol);
  bind(sock,ai->ai_addr,ai->ai_addrlen);
  
  while(1){
    char buf[128];
    int readlen;
    int sendlen;
    char addrbuf[128];
    
    memset(buf,0,sizeof(buf));
    peerlen = sizeof(peer);
    readlen=recvfrom(sock,buf,sizeof(buf),0,(struct sockaddr*)&peer,&peerlen);
    sendlen=sendto(sock,buf,readlen,0,(struct sockaddr*)&peer,sizeof(struct sockaddr_in6));
  }
  
  freeaddrinfo(res);
  return 0;
}