/*UDP-echoクライアント

a.out localhost [port番号]

2009.11.5  Haruka Fukai*/

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

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

  sock=socket(AF_INET6,SOCK_DGRAM,0);

  getaddrinfo(argv[1],argv[2],&hint,&res);
  for(ai=res;ai!=NULL;ai=ai->ai_next){
    memcpy(&server,ai->ai_addr,ai->ai_addrlen);
    break;
  }

  while(1){
    int len;
    char buf[128];
    char hed[128];
    strcpy(hed,"[s07811hf]");
    len=read(0,buf,sizeof(buf));
    strcat(hed,buf);
    sendto(sock,hed,len+10,0,(struct sockaddr*)&server,sizeof(struct sockaddr_in6));
    memset(buf,0,sizeof(buf));
    recvfrom(sock,buf,sizeof(buf),0,NULL,0);
    printf("%s\n",buf);
  }
  freeaddrinfo(res);
  return 0;
}