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/* Copyright 1998 by the Massachusetts Institute of Technology.
*
* $Id$
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
#include "setup.h"
#include <sys/types.h>
#ifdef WIN32
#else
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include "ares.h"
#include "ares_dns.h"
#include "inet_ntop.h"
#include "inet_net_pton.h"
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif
#ifndef HAVE_STRUCT_IN6_ADDR
struct in6_addr
{
unsigned char s6_addr[16];
};
#endif
static void callback(void *arg, int status, struct hostent *host);
static void usage(void);
int main(int argc, char **argv)
{
ares_channel channel;
int status, nfds, c, addr_family = AF_INET;
fd_set read_fds, write_fds;
struct timeval *tvp, tv;
struct in_addr addr4;
struct in6_addr addr6;
#ifdef WIN32
WORD wVersionRequested = MAKEWORD(1,1);
WSADATA wsaData;
WSAStartup(wVersionRequested, &wsaData);
#endif
while ((c = getopt(argc,argv,"t:h")) != -1)
{
switch (c)
{
case 't':
if (!strcasecmp(optarg,"a"))
addr_family = AF_INET;
else if (!strcasecmp(optarg,"aaaa"))
addr_family = AF_INET6;
else
usage();
break;
case 'h':
default:
usage();
break;
}
}
argc -= optind;
argv += optind;
if (argc < 1)
usage();
status = ares_init(&channel);
if (status != ARES_SUCCESS)
{
fprintf(stderr, "ares_init: %s\n", ares_strerror(status));
return 1;
}
/* Initiate the queries, one per command-line argument. */
for ( ; *argv; argv++)
{
if (ares_inet_pton(AF_INET, *argv, &addr4) == 1)
{
ares_gethostbyaddr(channel, &addr4, sizeof(addr4), AF_INET, callback,
*argv);
}
else if (ares_inet_pton(AF_INET6, *argv, &addr6) == 1)
{
ares_gethostbyaddr(channel, &addr6, sizeof(addr6), AF_INET6, callback,
*argv);
}
else
{
ares_gethostbyname(channel, *argv, addr_family, callback, *argv);
}
}
/* Wait for all queries to complete. */
while (1)
{
FD_ZERO(&read_fds);
FD_ZERO(&write_fds);
nfds = ares_fds(channel, &read_fds, &write_fds);
if (nfds == 0)
break;
tvp = ares_timeout(channel, NULL, &tv);
select(nfds, &read_fds, &write_fds, NULL, tvp);
ares_process(channel, &read_fds, &write_fds);
}
ares_destroy(channel);
return 0;
}
static void callback(void *arg, int status, struct hostent *host)
{
char **p;
if (status != ARES_SUCCESS)
{
fprintf(stderr, "%s: %s\n", (char *) arg, ares_strerror(status));
return;
}
for (p = host->h_addr_list; *p; p++)
{
char addr_buf[46] = "??";
ares_inet_ntop(host->h_addrtype, *p, addr_buf, sizeof(addr_buf));
printf("%-32s\t%s", host->h_name, addr_buf);
#if 0
if (host->h_aliases[0])
{
int i;
printf (", Aliases: ");
for (i = 0; host->h_aliases[i]; i++)
printf("%s ", host->h_aliases[i]);
}
#endif
puts("");
}
}
static void usage(void)
{
fprintf(stderr, "usage: ahost [-t {a|aaaa}] {host|addr} ...\n");
exit(1);
}
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