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
|
/*++
/* NAME
/* test_dns_lookup 1
/* SUMMARY
/* DNS lookup test program
/* SYNOPSIS
/* test_dns_lookup query-type domain-name
/* DESCRIPTION
/* test_dns_lookup performs a DNS query of the specified resource
/* type for the specified resource name.
/* DIAGNOSTICS
/* Problems are reported to the standard error stream.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
/* Utility library. */
#include <vstring.h>
#include <msg.h>
#include <msg_vstream.h>
#include <mymalloc.h>
#include <argv.h>
/* Global library. */
#include <mail_params.h>
/* Application-specific. */
#include "dns.h"
static void print_rr(VSTRING *buf, DNS_RR *rr)
{
while (rr) {
vstream_printf("ad: %u, rr: %s\n",
rr->dnssec_valid, dns_strrecord(buf, rr));
rr = rr->next;
}
}
static NORETURN usage(char **argv)
{
msg_fatal("usage: %s [-npv] [-f filter] types name", argv[0]);
}
int main(int argc, char **argv)
{
ARGV *types_argv;
unsigned *types;
char *name;
VSTRING *fqdn = vstring_alloc(100);
VSTRING *why = vstring_alloc(100);
VSTRING *buf;
int rcode;
DNS_RR *rr;
int i;
int ch;
int lflags = DNS_REQ_FLAG_NONE;
var_dnssec_probe = "";
msg_vstream_init(argv[0], VSTREAM_ERR);
while ((ch = GETOPT(argc, argv, "f:l:npvs")) > 0) {
switch (ch) {
case 'v':
msg_verbose++;
break;
case 'f':
dns_rr_filter_compile("DNS reply filter", optarg);
break;
case 'l':
var_dns_rr_list_limit = atoi(optarg);
break;
case 'n':
lflags |= DNS_REQ_FLAG_NCACHE_TTL;
break;
case 'p':
var_dns_ncache_ttl_fix = 1;
break;
case 's':
var_dnssec_probe = DEF_DNSSEC_PROBE;
break;
default:
usage(argv);
}
}
if (argc != optind + 2)
usage(argv);
types_argv = argv_split(argv[optind], CHARS_COMMA_SP);
types = (unsigned *) mymalloc(sizeof(*types) * (types_argv->argc + 1));
for (i = 0; i < types_argv->argc; i++)
if ((types[i] = dns_type(types_argv->argv[i])) == 0)
msg_fatal("invalid query type: %s", types_argv->argv[i]);
types[i] = 0;
argv_free(types_argv);
name = argv[optind + 1];
msg_verbose = 1;
switch (dns_lookup_rv(name, RES_USE_DNSSEC, &rr, fqdn, why,
&rcode, lflags, types)) {
default:
msg_warn("%s (rcode=%d)", vstring_str(why), rcode);
case DNS_OK:
if (rr) {
vstream_printf("%s: fqdn: %s\n", name, vstring_str(fqdn));
buf = vstring_alloc(100);
print_rr(buf, rr);
vstream_fflush(VSTREAM_OUT);
if (DNS_RR_IS_TRUNCATED(rr))
msg_warn("one or more excess DNS_RR records were dropped");
dns_rr_free(rr);
vstring_free(buf);
}
}
myfree((void *) types);
exit(0);
}
|
