/*
##########################################################################
# This script makes a DNS query and prints the results obtained.
# It's been used to test the Destination Address Selection procedure.
#
# This script needs to be linked with the KAME's lib "inet6", as follows:
#
# gcc -o test_das test_das.c -L/usr/local/lib/ -linet6
#
# NOTE: This program is hardly based on the "man getaddrinfo" of FreeBSD.
#
#(There is no copyright but the copyright of the "man" page, if any :)
##########################################################################                                                                       
*/

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>       

#include <stdio.h>

int main(int argc, char *argv[])
{
           struct addrinfo hints, *res, *res0;
           int error;
           int s;
           const char *cause = NULL;
	   char aux[INET6_ADDRSTRLEN];

	   /* checks the arguments and help if wrong */
	   if( argc != 2 )
	   {
	     fprintf(stderr,"test_das: You must specify a name to resolve.\n");
	     fprintf(stderr,"test_das: syntax: test_das <name>\n\n");
             exit(-1);
	   }
 
           memset(&hints, 0, sizeof(hints));
           hints.ai_family = PF_UNSPEC;
           hints.ai_socktype = SOCK_STREAM;
           error = getaddrinfo(argv[1], NULL, &hints, &res0);
           if (error) {
                   errx(1, "%s", gai_strerror(error));
                   /*NOTREACHED*/
           }
           s = -1;
           for (res = res0; res; res = res->ai_next) {

	     bzero(aux, INET6_ADDRSTRLEN);
	     if( res->ai_family == AF_INET)	  
	     {  
	       inet_ntop( AF_INET,  &(((struct sockaddr_in *)res->ai_addr)->sin_addr), 
			  aux, INET6_ADDRSTRLEN );    
	     }
	     else
	     {
	       inet_ntop( AF_INET6,  &(((struct sockaddr_in6 *)res->ai_addr)->sin6_addr), 
			  aux, INET6_ADDRSTRLEN );
	     }
	       
	     printf("addr: %s\n", aux);
	   }

           freeaddrinfo(res0);                       

	   return 0;
}