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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:46:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:46:30 +0000 |
commit | b5896ba9f6047e7031e2bdee0622d543e11a6734 (patch) | |
tree | fd7b460593a2fee1be579bec5697e6d887ea3421 /src/dns/test_dns_lookup.c | |
parent | Initial commit. (diff) | |
download | postfix-upstream/3.4.23.tar.xz postfix-upstream/3.4.23.zip |
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/dns/test_dns_lookup.c')
-rw-r--r-- | src/dns/test_dns_lookup.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/dns/test_dns_lookup.c b/src/dns/test_dns_lookup.c new file mode 100644 index 0000000..8366cf7 --- /dev/null +++ b/src/dns/test_dns_lookup.c @@ -0,0 +1,129 @@ +/*++ +/* 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); + dns_rr_free(rr); + vstring_free(buf); + vstream_fflush(VSTREAM_OUT); + } + } + myfree((void *) types); + exit(0); +} |