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-rw-r--r--src/utils/khost/khost_params.c365
1 files changed, 365 insertions, 0 deletions
diff --git a/src/utils/khost/khost_params.c b/src/utils/khost/khost_params.c
new file mode 100644
index 0000000..1423e09
--- /dev/null
+++ b/src/utils/khost/khost_params.c
@@ -0,0 +1,365 @@
+/* Copyright (C) 2022 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <getopt.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "utils/khost/khost_params.h"
+#include "utils/kdig/kdig_params.h"
+#include "utils/common/msg.h"
+#include "utils/common/params.h"
+#include "utils/common/resolv.h"
+#include "libknot/libknot.h"
+#include "contrib/strtonum.h"
+#include "contrib/ucw/lists.h"
+
+#define PROGRAM_NAME "khost"
+
+#define DEFAULT_RETRIES_HOST 1
+#define DEFAULT_TIMEOUT_HOST 2
+
+static const style_t DEFAULT_STYLE_HOST = {
+ .format = FORMAT_HOST,
+ .style = {
+ .wrap = false,
+ .show_class = true,
+ .show_ttl = true,
+ .verbose = false,
+ .original_ttl = false,
+ .empty_ttl = false,
+ .human_ttl = false,
+ .human_timestamp = true,
+ .generic = false,
+ .ascii_to_idn = name_to_idn
+ },
+ .show_query = false,
+ .show_header = false,
+ .show_edns = false,
+ .show_question = true,
+ .show_answer = true,
+ .show_authority = true,
+ .show_additional = true,
+ .show_tsig = false,
+ .show_footer = false
+};
+
+static int khost_init(kdig_params_t *params)
+{
+ // Initialize params with kdig defaults.
+ int ret = kdig_init(params);
+
+ if (ret != KNOT_EOK) {
+ return ret;
+ }
+
+ // Set khost specific defaults.
+ free(params->config->port);
+ params->config->port = strdup(DEFAULT_DNS_PORT);
+ params->config->retries = DEFAULT_RETRIES_HOST;
+ params->config->wait = DEFAULT_TIMEOUT_HOST;
+ params->config->class_num = KNOT_CLASS_IN;
+ params->config->style = DEFAULT_STYLE_HOST;
+ params->config->idn = true;
+
+ // Check port.
+ if (params->config->port == NULL) {
+ query_free(params->config);
+ return KNOT_ENOMEM;
+ }
+
+ return KNOT_EOK;
+}
+
+void khost_clean(kdig_params_t *params)
+{
+ if (params == NULL) {
+ DBG_NULL;
+ return;
+ }
+
+ kdig_clean(params);
+}
+
+static int parse_server(const char *value, list_t *servers, const char *def_port)
+{
+ if (params_parse_server(value, servers, def_port) != KNOT_EOK) {
+ ERR("invalid server %s", value);
+ return KNOT_EINVAL;
+ }
+
+ return KNOT_EOK;
+}
+
+static int parse_name(const char *value, list_t *queries, const query_t *conf)
+{
+ char *reverse = get_reverse_name(value);
+ char *ascii_name = (char *)value;
+ query_t *query;
+
+ if (conf->idn) {
+ ascii_name = name_from_idn(value);
+ if (ascii_name == NULL) {
+ free(reverse);
+ return KNOT_EINVAL;
+ }
+ }
+
+ // If name is not FQDN, append trailing dot.
+ char *fqd_name = get_fqd_name(ascii_name);
+
+ if (conf->idn) {
+ free(ascii_name);
+ }
+
+ // RR type is known.
+ if (conf->type_num >= 0) {
+ if (conf->type_num == KNOT_RRTYPE_PTR) {
+ free(fqd_name);
+
+ // Check for correct address.
+ if (reverse == NULL) {
+ ERR("invalid IPv4/IPv6 address %s", value);
+ return KNOT_EINVAL;
+ }
+
+ // Add reverse query for address.
+ query = query_create(reverse, conf);
+ free(reverse);
+ if (query == NULL) {
+ return KNOT_ENOMEM;
+ }
+ add_tail(queries, (node_t *)query);
+ } else {
+ free(reverse);
+
+ // Add query for name and specified type.
+ query = query_create(fqd_name, conf);
+ free(fqd_name);
+ if (query == NULL) {
+ return KNOT_ENOMEM;
+ }
+ add_tail(queries, (node_t *)query);
+ }
+ // RR type is unknown, use defaults.
+ } else {
+ if (reverse == NULL) {
+ // Add query for name and type A.
+ query = query_create(fqd_name, conf);
+ if (query == NULL) {
+ free(fqd_name);
+ return KNOT_ENOMEM;
+ }
+ query->type_num = KNOT_RRTYPE_A;
+ add_tail(queries, (node_t *)query);
+
+ // Add query for name and type AAAA.
+ query = query_create(fqd_name, conf);
+ if (query == NULL) {
+ free(fqd_name);
+ return KNOT_ENOMEM;
+ }
+ query->type_num = KNOT_RRTYPE_AAAA;
+ query->style.hide_cname = true;
+ add_tail(queries, (node_t *)query);
+
+ // Add query for name and type MX.
+ query = query_create(fqd_name, conf);
+ if (query == NULL) {
+ free(fqd_name);
+ return KNOT_ENOMEM;
+ }
+ free(fqd_name);
+ query->type_num = KNOT_RRTYPE_MX;
+ query->style.hide_cname = true;
+ add_tail(queries, (node_t *)query);
+ } else {
+ free(fqd_name);
+
+ // Add reverse query for address.
+ query = query_create(reverse, conf);
+ free(reverse);
+ if (query == NULL) {
+ return KNOT_ENOMEM;
+ }
+ query->type_num = KNOT_RRTYPE_PTR;
+ add_tail(queries, (node_t *)query);
+ }
+ }
+
+ return KNOT_EOK;
+}
+
+static void print_help(void)
+{
+ printf("Usage: %s [-4] [-6] [-adhrsTvVw] [-c class] [-t type]\n"
+ " [-R retries] [-W time] name [server]\n\n"
+ " -4 Use IPv4 protocol only.\n"
+ " -6 Use IPv6 protocol only.\n"
+ " -a Same as -t ANY -v.\n"
+ " -d Allow debug messages.\n"
+ " -h, --help Print the program help.\n"
+ " -r Disable recursion.\n"
+ " -T Use TCP protocol.\n"
+ " -v Verbose output.\n"
+ " -V, --version Print the program version.\n"
+ " -w Wait forever.\n"
+ " -c Set query class.\n"
+ " -t Set query type.\n"
+ " -R Set number of UDP retries.\n"
+ " -W Set wait interval.\n",
+ PROGRAM_NAME);
+}
+
+int khost_parse(kdig_params_t *params, int argc, char *argv[])
+{
+ if (params == NULL || argv == NULL) {
+ DBG_NULL;
+ return KNOT_EINVAL;
+ }
+
+ if (khost_init(params) != KNOT_EOK) {
+ return KNOT_ERROR;
+ }
+
+#ifdef LIBIDN
+ // Set up localization.
+ if (setlocale(LC_CTYPE, "") == NULL) {
+ params->config->idn = false;
+ }
+#endif
+
+ query_t *conf = params->config;
+ uint16_t rclass, rtype;
+ int64_t serial;
+ bool notify;
+
+ // Long options.
+ struct option opts[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+ { NULL }
+ };
+
+ // Command line options processing.
+ int opt = 0;
+ while ((opt = getopt_long(argc, argv, "46adhrsTvVwc:t:R:W:", opts, NULL))
+ != -1) {
+ switch (opt) {
+ case '4':
+ conf->ip = IP_4;
+ break;
+ case '6':
+ conf->ip = IP_6;
+ break;
+ case 'a':
+ conf->type_num = KNOT_RRTYPE_ANY;
+ conf->style.format = FORMAT_FULL;
+ conf->style.show_header = true;
+ conf->style.show_edns = true;
+ conf->style.show_footer = true;
+ break;
+ case 'd':
+ msg_enable_debug(1);
+ break;
+ case 'h':
+ print_help();
+ params->stop = false;
+ return KNOT_EOK;
+ case 'r':
+ conf->flags.rd_flag = false;
+ break;
+ case 'T':
+ conf->protocol = PROTO_TCP;
+ break;
+ case 'v':
+ conf->style.format = FORMAT_FULL;
+ conf->style.show_header = true;
+ conf->style.show_edns = true;
+ conf->style.show_footer = true;
+ break;
+ case 'V':
+ print_version(PROGRAM_NAME);
+ params->stop = false;
+ return KNOT_EOK;
+ case 'w':
+ conf->wait = -1;
+ break;
+ case 'c':
+ if (params_parse_class(optarg, &rclass) != KNOT_EOK) {
+ ERR("invalid class '%s'", optarg);
+ return KNOT_EINVAL;
+ }
+ conf->class_num = rclass;
+ break;
+ case 't':
+ if (params_parse_type(optarg, &rtype, &serial, &notify)
+ != KNOT_EOK) {
+ ERR("invalid type '%s'", optarg);
+ return KNOT_EINVAL;
+ }
+ conf->type_num = rtype;
+ conf->serial = serial;
+ conf->notify = notify;
+
+ // If NOTIFY, reset default RD flag.
+ if (conf->notify) {
+ conf->flags.rd_flag = false;
+ }
+ break;
+ case 'R':
+ if (str_to_u32(optarg, &conf->retries) != KNOT_EOK) {
+ ERR("invalid retries '%s'", optarg);
+ return KNOT_EINVAL;
+ }
+ break;
+ case 'W':
+ if (params_parse_wait(optarg, &conf->wait) != KNOT_EOK) {
+ ERR("invalid wait '%s'", optarg);
+ return KNOT_EINVAL;
+ }
+ break;
+ default:
+ print_help();
+ return KNOT_ENOTSUP;
+ }
+ }
+
+ // Process non-option parameters.
+ switch (argc - optind) {
+ case 2:
+ if (parse_server(argv[optind + 1], &conf->servers, conf->port)
+ != KNOT_EOK) {
+ return KNOT_EINVAL;
+ }
+ case 1: // Fall through.
+ if (parse_name(argv[optind], &params->queries, conf)
+ != KNOT_EOK) {
+ return KNOT_EINVAL;
+ }
+ break;
+ default:
+ print_help();
+ return KNOT_ENOTSUP;
+ }
+
+ // Complete missing data in queries based on defaults.
+ complete_queries(&params->queries, params->config);
+
+ return KNOT_EOK;
+}
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