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/*
* options.h -- nsd.conf options definitions and prototypes
*
* Copyright (c) 2001-2006, NLnet Labs. All rights reserved.
*
* See LICENSE for the license.
*
*/
#ifndef OPTIONS_H
#define OPTIONS_H
#include <config.h>
#include <stdarg.h>
#include "region-allocator.h"
#include "rbtree.h"
struct query;
struct dname;
struct tsig_key;
typedef struct nsd_options nsd_options_t;
typedef struct zone_options zone_options_t;
typedef struct ipaddress_option ip_address_option_t;
typedef struct acl_options acl_options_t;
typedef struct key_options key_options_t;
typedef struct config_parser_state config_parser_state_t;
/*
* Options global for nsd.
*/
struct nsd_options {
/* options for zones, by apex, contains zone_options_t */
rbtree_t* zone_options;
/* list of keys defined */
key_options_t* keys;
size_t numkeys;
/* list of ip adresses to bind to (or NULL for all) */
ip_address_option_t* ip_addresses;
int debug_mode;
int verbosity;
int hide_version;
int ip4_only;
int ip6_only;
const char* database;
const char* identity;
const char* logfile;
int server_count;
int tcp_count;
int tcp_query_count;
int tcp_timeout;
size_t ipv4_edns_size;
size_t ipv6_edns_size;
const char* pidfile;
const char* port;
int statistics;
const char* chroot;
const char* username;
const char* zonesdir;
const char* difffile;
const char* xfrdfile;
const char* nsid;
int xfrd_reload_timeout;
region_type* region;
};
struct ipaddress_option {
ip_address_option_t* next;
char* address;
};
/*
* Options for a zone
*/
struct zone_options {
/* key is dname of apex */
rbnode_t node;
/* is apex of the zone */
const char* name;
const char* zonefile;
acl_options_t* allow_notify;
acl_options_t* request_xfr;
acl_options_t* notify;
acl_options_t* provide_xfr;
acl_options_t* outgoing_interface;
uint8_t allow_axfr_fallback;
uint8_t notify_retry;
};
union acl_addr_storage {
#ifdef INET6
struct in_addr addr;
struct in6_addr addr6;
#else
struct in_addr addr;
#endif
};
/*
* Access control list element
*/
struct acl_options {
acl_options_t* next;
/* options */
uint8_t use_axfr_only;
uint8_t allow_udp;
time_t ixfr_disabled;
/* ip address range */
const char* ip_address_spec;
uint8_t is_ipv6;
unsigned int port; /* is 0(no port) or suffix @port value */
union acl_addr_storage addr;
union acl_addr_storage range_mask;
enum {
acl_range_single = 0, /* single adress */
acl_range_mask = 1, /* 10.20.30.40&255.255.255.0 */
acl_range_subnet = 2, /* 10.20.30.40/28 */
acl_range_minmax = 3 /* 10.20.30.40-10.20.30.60 (mask=max) */
} rangetype;
/* key */
uint8_t nokey;
uint8_t blocked;
const char* key_name;
key_options_t* key_options;
};
/*
* Key definition
*/
struct key_options {
key_options_t* next;
const char* name;
const char* algorithm;
const char* secret;
#ifdef TSIG
struct tsig_key* tsig_key;
#endif
};
/*
* Used during options parsing
*/
struct config_parser_state {
const char* filename;
int line;
int errors;
nsd_options_t* opt;
zone_options_t* current_zone;
key_options_t* current_key;
ip_address_option_t* current_ip_address_option;
acl_options_t* current_allow_notify;
acl_options_t* current_request_xfr;
acl_options_t* current_notify;
acl_options_t* current_provide_xfr;
acl_options_t* current_outgoing_interface;
};
extern config_parser_state_t* cfg_parser;
/* region will be put in nsd_options struct. Returns empty options struct. */
nsd_options_t* nsd_options_create(region_type* region);
/* the number of zones that are configured */
static inline size_t nsd_options_num_zones(nsd_options_t* opt)
{ return opt->zone_options->count; }
/* insert a zone into the main options tree, returns 0 on error */
int nsd_options_insert_zone(nsd_options_t* opt, zone_options_t* zone);
/* parses options file. Returns false on failure */
int parse_options_file(nsd_options_t* opt, const char* file);
zone_options_t* zone_options_create(region_type* region);
/* find a zone by apex domain name, or NULL if not found. */
zone_options_t* zone_options_find(nsd_options_t* opt, const struct dname* apex);
key_options_t* key_options_create(region_type* region);
key_options_t* key_options_find(nsd_options_t* opt, const char* name);
/* tsig must be inited, adds all keys in options to tsig. */
void key_options_tsig_add(nsd_options_t* opt);
/* check acl list, acl number that matches if passed(0..),
* or failure (-1) if dropped */
/* the reason why (the acl) is returned too (or NULL) */
int acl_check_incoming(acl_options_t* acl, struct query* q,
acl_options_t** reason);
int acl_addr_matches(acl_options_t* acl, struct query* q);
int acl_key_matches(acl_options_t* acl, struct query* q);
int acl_addr_match_mask(uint32_t* a, uint32_t* b, uint32_t* mask, size_t sz);
int acl_addr_match_range(uint32_t* minval, uint32_t* x, uint32_t* maxval, size_t sz);
/* returns true if acls are both from the same host */
int acl_same_host(acl_options_t* a, acl_options_t* b);
/* find acl by number in the list */
acl_options_t* acl_find_num(acl_options_t* acl, int num);
/* see if a zone is a slave or a master zone */
int zone_is_slave(zone_options_t* opt);
/* parsing helpers */
void c_error(const char* msg);
void c_error_msg(const char* fmt, ...) ATTR_FORMAT(printf, 1, 2);
acl_options_t* parse_acl_info(region_type* region, char* ip, const char* key);
/* true if ipv6 address, false if ipv4 */
int parse_acl_is_ipv6(const char* p);
/* returns range type. mask is the 2nd part of the range */
int parse_acl_range_type(char* ip, char** mask);
/* parses subnet mask, fills 0 mask as well */
void parse_acl_range_subnet(char* p, void* addr, int maxbits);
/* clean up options */
void nsd_options_destroy(nsd_options_t* opt);
#endif /* OPTIONS_H */
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