1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/* 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"
#if !defined(WIN32) || defined(WATT32)
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ares.h"
#include "ares_dns.h"
#include "inet_ntop.h"
#include "inet_net_pton.h"
#include "ares_getopt.h"
#ifndef HAVE_STRDUP
# include "ares_strdup.h"
# define strdup(ptr) ares_strdup(ptr)
#endif
#ifndef HAVE_STRCASECMP
# include "ares_strcasecmp.h"
# define strcasecmp(p1,p2) ares_strcasecmp(p1,p2)
#endif
#ifndef HAVE_STRNCASECMP
# include "ares_strcasecmp.h"
# define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n)
#endif
static void callback(void *arg, int status, int timeouts, 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 USE_WINSOCK
WORD wVersionRequested = MAKEWORD(USE_WINSOCK,USE_WINSOCK);
WSADATA wsaData;
WSAStartup(wVersionRequested, &wsaData);
#endif
while ((c = ares_getopt(argc,argv,"dt:h")) != -1)
{
switch (c)
{
case 'd':
#ifdef WATT32
dbug_init();
#endif
break;
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);
#ifdef USE_WINSOCK
WSACleanup();
#endif
return 0;
}
static void callback(void *arg, int status, int timeouts, struct hostent *host)
{
char **p;
(void)timeouts;
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);
}
|
