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/*++
/* 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;
if (var_dnssec_probe == 0)
var_dnssec_probe = mystrdup(DEF_DNSSEC_PROBE);
msg_vstream_init(argv[0], VSTREAM_ERR);
while ((ch = GETOPT(argc, argv, "f:npv")) > 0) {
switch (ch) {
case 'v':
msg_verbose++;
break;
case 'f':
dns_rr_filter_compile("DNS reply filter", optarg);
break;
case 'n':
lflags |= DNS_REQ_FLAG_NCACHE_TTL;
break;
case 'p':
var_dns_ncache_ttl_fix = 1;
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);
}
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