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/* 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/>.
*/
#pragma once
#include <limits.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include "libknot/libknot.h"
#include "contrib/ucw/lists.h"
#define DEFAULT_IPV4_NAME "127.0.0.1"
#define DEFAULT_IPV6_NAME "::1"
#define DEFAULT_DNS_PORT "53"
#define DEFAULT_DNS_HTTPS_PORT "443"
#define DEFAULT_DNS_QUIC_PORT "853"
#define DEFAULT_DNS_TLS_PORT "853"
#define DEFAULT_UDP_SIZE 512
#define DEFAULT_EDNS_SIZE 4096
#define MAX_PACKET_SIZE 65535
#define SEP_CHARS "\n\t "
/*! \brief Variants of IP protocol. */
typedef enum {
IP_ALL,
IP_4,
IP_6
} ip_t;
/*! \brief Variants of transport protocol. */
typedef enum {
PROTO_ALL,
PROTO_TCP,
PROTO_UDP
} protocol_t;
/*! \brief Variants of output type. */
typedef enum {
/*!< Verbose output (same for host and dig). */
FORMAT_FULL,
/*!< Short dig output. */
FORMAT_DIG,
/*!< Brief host output. */
FORMAT_HOST,
/*!< Brief nsupdate output. */
FORMAT_NSUPDATE,
/*!< Machine readable JSON format (RFC 8427). */
FORMAT_JSON
} format_t;
/*! \brief Text output settings. */
typedef struct {
/*!< Output format. */
format_t format;
/*!< Style of rrset dump. */
knot_dump_style_t style;
/*!< Show query packet. */
bool show_query;
/*!< Show header info. */
bool show_header;
/*!< Show section name. */
bool show_section;
/*!< Show EDNS pseudosection. */
bool show_edns;
/*!< Show unknown EDNS options in printable format. */
bool show_edns_opt_text;
/*!< Show QUERY/ZONE section. */
bool show_question;
/*!< Show ANSWER/PREREQ section. */
bool show_answer;
/*!< Show UPDATE/AUTHORITY section. */
bool show_authority;
/*!< Show ADDITIONAL section. */
bool show_additional;
/*!< Show TSIG pseudosection. */
bool show_tsig;
/*!< Show footer info. */
bool show_footer;
/*!< KHOST - Hide CNAME record in answer (duplicity reduction). */
bool hide_cname;
} style_t;
/*! \brief Parameter handler. */
typedef int (*param_handle_f)(const char *arg, void *params);
/*! \brief Parameter argument type. */
typedef enum {
ARG_NONE,
ARG_REQUIRED,
ARG_OPTIONAL
} arg_t;
/*! \brief Parameter specification. */
typedef struct {
const char *name;
arg_t arg;
param_handle_f handler;
} param_t;
inline static void print_version(const char *program_name)
{
printf("%s (Knot DNS), version %s\n", program_name, PACKAGE_VERSION);
}
/*!
* \brief Transforms localized IDN string to ASCII punycode.
*
* \param idn_name IDN name to transform.
*
* \retval NULL if transformation fails.
* \retval string if ok.
*/
char *name_from_idn(const char *idn_name);
/*!
* \brief Transforms ASCII punycode to localized IDN string.
*
* If an error occurs or IDN support is missing, this function does nothing.
*
* \param name ASCII name to transform and replace with IDN name.
*/
void name_to_idn(char **name);
/*!
* \brief Find the best parameter match in table based on prefix equality.
*
* \param str Parameter name to look up.
* \param str_len Parameter name length.
* \param tbl Parameter table.
* \param unique Indication if output is unique result.
*
* \retval >=0 looked up parameter position in \a tbl.
* \retval err if error.
*/
int best_param(const char *str, const size_t str_len, const param_t *tbl,
bool *unique);
char *get_reverse_name(const char *name);
char *get_fqd_name(const char *name);
int params_parse_class(const char *value, uint16_t *rclass);
int params_parse_type(const char *value, uint16_t *rtype, int64_t *serial,
bool *notify);
int params_parse_server(const char *value, list_t *servers, const char *def_port);
int params_parse_wait(const char *value, int32_t *dst);
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