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/* Copyright (C) 2018 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 <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdbool.h>
#include "utils/common/params.h"
#include "utils/common/exec.h"
#include "utils/common/sign.h"
#include "libknot/libknot.h"
#include "contrib/sockaddr.h"
#if USE_DNSTAP
# include "contrib/dnstap/reader.h"
# include "contrib/dnstap/writer.h"
#endif // USE_DNSTAP
/*! \brief Operation mode of kdig. */
typedef enum {
/*!< Standard 1-message query/reply. */
OPERATION_QUERY,
/*!< Zone transfer (AXFR or IXFR). */
OPERATION_XFR,
/*!< Dump dnstap file. */
OPERATION_LIST_DNSTAP,
/*!< Query for NS and all authoritative SOA records. */
OPERATION_LIST_SOA
} operation_t;
/*! \brief DNS header and EDNS flags. */
typedef struct {
/*!< Authoritative answer flag. */
bool aa_flag;
/*!< Truncated flag. */
bool tc_flag;
/*!< Recursion desired flag. */
bool rd_flag;
/*!< Recursion available flag. */
bool ra_flag;
/*!< Z flag. */
bool z_flag;
/*!< Authenticated data flag. */
bool ad_flag;
/*!< Checking disabled flag. */
bool cd_flag;
/*!< DNSSEC OK flag. */
bool do_flag;
} flags_t;
/*! \brief Basic parameters for DNS query. */
typedef struct query query_t; // Forward declaration due to configuration.
struct query {
/*!< List node (for list container). */
node_t n;
/*!< Reference to global config. */
const query_t *conf;
/*!< Name to query on. */
char *owner;
/*!< List of nameservers to query to. */
list_t servers;
/*!< Local interface (optional). */
srv_info_t *local;
/*!< Operation mode. */
operation_t operation;
/*!< Version of ip protocol to use. */
ip_t ip;
/*!< Protocol type (TCP, UDP) to use. */
protocol_t protocol;
/*!< Use TCP Fast Open. */
bool fastopen;
/*!< Port/service to connect to. */
char *port;
/*!< UDP buffer size (16unsigned + -1 uninitialized). */
int32_t udp_size;
/*!< Number of UDP retries. */
uint32_t retries;
/*!< Wait for network response in seconds (-1 means forever). */
int32_t wait;
/*!< Ignore truncated response. */
bool ignore_tc;
/*!< Class number (16unsigned + -1 uninitialized). */
int32_t class_num;
/*!< Type number (16unsigned + -1 uninitialized). */
int32_t type_num;
/*!< SOA serial for IXFR and NOTIFY (32unsigned + -1 uninitialized). */
int64_t serial;
/*!< NOTIFY query. */
bool notify;
/*!< Header flags. */
flags_t flags;
/*!< Output settings. */
style_t style;
/*!< IDN conversion. */
bool idn;
/*!< Query for NSID. */
bool nsid;
/*!< EDNS version (8unsigned + -1 uninitialized). */
int16_t edns;
/*!< EDNS client cookie. */
knot_edns_cookie_t cc;
/*!< EDNS server cookie. */
knot_edns_cookie_t sc;
/*!< Repeat query after BADCOOKIE. */
bool badcookie;
/*!< EDNS0 padding (16unsigned + -1 ~ uninitialized, -2 ~ default, -3 ~ none). */
int32_t padding;
/*!< Query alignment with EDNS0 padding (0 ~ uninitialized). */
uint16_t alignment;
/*!< TLS parameters. */
tls_params_t tls;
/*!< Transaction signature. */
knot_tsig_key_t tsig_key;
/*!< EDNS client subnet. */
knot_edns_client_subnet_t subnet;
/*!< Lits of custom EDNS options. */
list_t edns_opts;
#if USE_DNSTAP
/*!< Context for dnstap reader input. */
dt_reader_t *dt_reader;
/*!< Context for dnstap writer output. */
dt_writer_t *dt_writer;
#endif // USE_DNSTAP
};
/*! \brief EDNS option data. */
typedef struct {
/*! List node (for list container). */
node_t n;
/*!< OPTION-CODE field. */
uint16_t code;
/*!< OPTION-LENGTH field. */
uint16_t length;
/*!< OPTION-DATA field. */
uint8_t *data;
} ednsopt_t;
/*! \brief Settings for kdig. */
typedef struct {
/*!< Stop processing - just print help, version,... */
bool stop;
/*!< List of DNS queries to process. */
list_t queries;
/*!< Default settings for queries. */
query_t *config;
} kdig_params_t;
query_t *query_create(const char *owner, const query_t *config);
void query_free(query_t *query);
void complete_queries(list_t *queries, const query_t *conf);
ednsopt_t *ednsopt_create(uint16_t code, uint16_t length, uint8_t *data);
ednsopt_t *ednsopt_dup(const ednsopt_t *opt);
void ednsopt_free(ednsopt_t *opt);
void ednsopt_list_init(list_t *list);
void ednsopt_list_deinit(list_t *list);
int ednsopt_list_dup(list_t *dst, const list_t *src);
bool ednsopt_list_empty(const list_t *list);
int kdig_init(kdig_params_t *params);
int kdig_parse(kdig_params_t *params, int argc, char *argv[]);
void kdig_clean(kdig_params_t *params);
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