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
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "server_setup.h"
/* Purpose
*
* Resolve the given name, using system name resolve functions (NOT any
* function provided by libcurl). Used to see if the name exists and thus if
* we can allow a test case to use it for testing.
*
* Like if 'localhost' actual exists etc.
*
*/
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef _XOPEN_SOURCE_EXTENDED
/* This define is "almost" required to build on HPUX 11 */
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#define ENABLE_CURLX_PRINTF
/* make the curlx header define all printf() functions to use the curlx_*
versions instead */
#include "curlx.h" /* from the private lib dir */
#include "util.h"
/* include memdebug.h last */
#include "memdebug.h"
static bool use_ipv6 = FALSE;
static const char *ipv_inuse = "IPv4";
const char *serverlogfile=""; /* for a util.c function we don't use */
int main(int argc, char *argv[])
{
int arg=1;
const char *host = NULL;
int rc = 0;
while(argc>arg) {
if(!strcmp("--version", argv[arg])) {
printf("resolve IPv4%s\n",
#ifdef ENABLE_IPV6
"/IPv6"
#else
""
#endif
);
return 0;
}
else if(!strcmp("--ipv6", argv[arg])) {
ipv_inuse = "IPv6";
use_ipv6 = TRUE;
arg++;
}
else if(!strcmp("--ipv4", argv[arg])) {
/* for completeness, we support this option as well */
ipv_inuse = "IPv4";
use_ipv6 = FALSE;
arg++;
}
else {
host = argv[arg++];
}
}
if(!host) {
puts("Usage: resolve [option] <host>\n"
" --version\n"
" --ipv4"
#ifdef ENABLE_IPV6
"\n --ipv6"
#endif
);
return 1;
}
#ifdef WIN32
win32_init();
atexit(win32_cleanup);
#endif
if(!use_ipv6) {
/* gethostbyname() resolve */
struct hostent *he;
he = gethostbyname(host);
rc = !he;
}
else {
#ifdef ENABLE_IPV6
/* Check that the system has IPv6 enabled before checking the resolver */
curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
if(s == CURL_SOCKET_BAD)
/* an IPv6 address was requested and we can't get/use one */
rc = -1;
else {
sclose(s);
}
if (rc == 0) {
/* getaddrinfo() resolve */
struct addrinfo *ai;
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_INET6;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_CANONNAME;
/* Use parenthesis around functions to stop them from being replaced by
the macro in memdebug.h */
rc = (getaddrinfo)(host, "80", &hints, &ai);
if (rc == 0)
(freeaddrinfo)(ai);
}
#else
puts("IPv6 support has been disabled in this program");
return 1;
#endif
}
if(rc)
printf("Resolving %s '%s' didn't work\n", ipv_inuse, host);
return !!rc;
}
|
