1 /* Copyright 1998 by the Massachusetts Institute of Technology.
2 *
3 *
4 * Permission to use, copy, modify, and distribute this
5 * software and its documentation for any purpose and without
6 * fee is hereby granted, provided that the above copyright
7 * notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting
9 * documentation, and that the name of M.I.T. not be used in
10 * advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission.
12 * M.I.T. makes no representations about the suitability of
13 * this software for any purpose. It is provided "as is"
14 * without express or implied warranty.
15 */
16
17 #include "ares_setup.h"
18
19 #if !defined(WIN32) || defined(WATT32)
20 #ifdef HAVE_SYS_TIME_H
21 #include <sys/time.h>
22 #endif
23 #include <sys/socket.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
26 #include <netdb.h>
27 #ifdef HAVE_UNISTD_H
28 #include <unistd.h>
29 #endif
30 #endif
31 #ifdef HAVE_STRINGS_H
32 #include <strings.h>
33 #endif
34
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "ares.h"
40 #include "ares_dns.h"
41 #include "inet_ntop.h"
42 #include "inet_net_pton.h"
43 #include "ares_getopt.h"
44 #include "ares_ipv6.h"
45 #include "ares_nowarn.h"
46
47 #ifndef HAVE_STRDUP
48 # include "ares_strdup.h"
49 # define strdup(ptr) ares_strdup(ptr)
50 #endif
51
52 #ifndef HAVE_STRCASECMP
53 # include "ares_strcasecmp.h"
54 # define strcasecmp(p1,p2) ares_strcasecmp(p1,p2)
55 #endif
56
57 #ifndef HAVE_STRNCASECMP
58 # include "ares_strcasecmp.h"
59 # define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n)
60 #endif
61
62 static void callback(void *arg, int status, int timeouts, struct hostent *host);
63 static void usage(void);
64
main(int argc,char ** argv)65 int main(int argc, char **argv)
66 {
67 ares_channel channel;
68 int status, nfds, c, addr_family = AF_INET;
69 fd_set read_fds, write_fds;
70 struct timeval *tvp, tv;
71 struct in_addr addr4;
72 struct ares_in6_addr addr6;
73
74 #ifdef USE_WINSOCK
75 WORD wVersionRequested = MAKEWORD(USE_WINSOCK,USE_WINSOCK);
76 WSADATA wsaData;
77 WSAStartup(wVersionRequested, &wsaData);
78 #endif
79
80 status = ares_library_init(ARES_LIB_INIT_ALL);
81 if (status != ARES_SUCCESS)
82 {
83 fprintf(stderr, "ares_library_init: %s\n", ares_strerror(status));
84 return 1;
85 }
86
87 while ((c = ares_getopt(argc,argv,"dt:h")) != -1)
88 {
89 switch (c)
90 {
91 case 'd':
92 #ifdef WATT32
93 dbug_init();
94 #endif
95 break;
96 case 't':
97 if (!strcasecmp(optarg,"a"))
98 addr_family = AF_INET;
99 else if (!strcasecmp(optarg,"aaaa"))
100 addr_family = AF_INET6;
101 else
102 usage();
103 break;
104 case 'h':
105 default:
106 usage();
107 break;
108 }
109 }
110
111 argc -= optind;
112 argv += optind;
113 if (argc < 1)
114 usage();
115
116 status = ares_init(&channel);
117 if (status != ARES_SUCCESS)
118 {
119 fprintf(stderr, "ares_init: %s\n", ares_strerror(status));
120 return 1;
121 }
122
123 /* Initiate the queries, one per command-line argument. */
124 for ( ; *argv; argv++)
125 {
126 if (ares_inet_pton(AF_INET, *argv, &addr4) == 1)
127 {
128 ares_gethostbyaddr(channel, &addr4, sizeof(addr4), AF_INET, callback,
129 *argv);
130 }
131 else if (ares_inet_pton(AF_INET6, *argv, &addr6) == 1)
132 {
133 ares_gethostbyaddr(channel, &addr6, sizeof(addr6), AF_INET6, callback,
134 *argv);
135 }
136 else
137 {
138 ares_gethostbyname(channel, *argv, addr_family, callback, *argv);
139 }
140 }
141
142 /* Wait for all queries to complete. */
143 for (;;)
144 {
145 FD_ZERO(&read_fds);
146 FD_ZERO(&write_fds);
147 nfds = ares_fds(channel, &read_fds, &write_fds);
148 if (nfds == 0)
149 break;
150 tvp = ares_timeout(channel, NULL, &tv);
151 select(nfds, &read_fds, &write_fds, NULL, tvp);
152 ares_process(channel, &read_fds, &write_fds);
153 }
154
155 ares_destroy(channel);
156
157 ares_library_cleanup();
158
159 #ifdef USE_WINSOCK
160 WSACleanup();
161 #endif
162
163 return 0;
164 }
165
callback(void * arg,int status,int timeouts,struct hostent * host)166 static void callback(void *arg, int status, int timeouts, struct hostent *host)
167 {
168 char **p;
169
170 (void)timeouts;
171
172 if (status != ARES_SUCCESS)
173 {
174 fprintf(stderr, "%s: %s\n", (char *) arg, ares_strerror(status));
175 return;
176 }
177
178 for (p = host->h_addr_list; *p; p++)
179 {
180 char addr_buf[46] = "??";
181
182 ares_inet_ntop(host->h_addrtype, *p, addr_buf, sizeof(addr_buf));
183 printf("%-32s\t%s", host->h_name, addr_buf);
184 #if 0
185 if (host->h_aliases[0])
186 {
187 int i;
188
189 printf (", Aliases: ");
190 for (i = 0; host->h_aliases[i]; i++)
191 printf("%s ", host->h_aliases[i]);
192 }
193 #endif
194 puts("");
195 }
196 }
197
usage(void)198 static void usage(void)
199 {
200 fprintf(stderr, "usage: ahost [-t {a|aaaa}] {host|addr} ...\n");
201 exit(1);
202 }
203