dns_cache.c File Reference

DNS cache management. More...

#include <stdlib.h>
#include "core/net.h"
#include "dns/dns_cache.h"
#include "dns/dns_client.h"
#include "mdns/mdns_client.h"
#include "netbios/nbns_client.h"
#include "llmnr/llmnr_client.h"
#include "core/udp.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   DNS_TRACE_LEVEL

Functions
error_t	dnsInit (void)
	DNS cache initialization. More...
void	dnsFlushCache (NetInterface *interface)
	Flush DNS cache. More...
DnsCacheEntry *	dnsCreateEntry (void)
	Create a new entry in the DNS cache. More...
void	dnsDeleteEntry (DnsCacheEntry *entry)
	Delete the specified DNS cache entry. More...
DnsCacheEntry *	dnsFindEntry (NetInterface *interface, const char_t *name, HostType type, HostnameResolver protocol)
	Search the DNS cache for a given domain name. More...
void	dnsTick (void)
	DNS timer handler. More...

Variables
systime_t	dnsTickCounter
DnsCacheEntry	dnsCache [DNS_CACHE_SIZE]

Detailed Description

DNS cache management.

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2010-2024 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneTCP Open.

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 2 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.4.0

Definition in file dns_cache.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   DNS_TRACE_LEVEL

Definition at line 32 of file dns_cache.c.

Function Documentation

dnsCreateEntry()

DnsCacheEntry* dnsCreateEntry

(

void

)

Create a new entry in the DNS cache.

Returns

Pointer to the newly created entry

Definition at line 104 of file dns_cache.c.

dnsDeleteEntry()

void dnsDeleteEntry

(

DnsCacheEntry *

entry

)

Delete the specified DNS cache entry.

Parameters

[in]

entry

Pointer to the DNS cache entry to be deleted

Definition at line 153 of file dns_cache.c.

dnsFindEntry()

DnsCacheEntry* dnsFindEntry	(	NetInterface *	interface,
		const char_t *	name,
		HostType	type,
		HostnameResolver	protocol
	)

Search the DNS cache for a given domain name.

Parameters

[in]	interface	Underlying network interface
[in]	name	Domain name
[in]	type	Host type (IPv4 or IPv6)
[in]	protocol	Host name resolution protocol

Returns

A pointer to the matching DNS entry is returned. NULL is returned if the specified domain name could not be found in the DNS cache

Definition at line 187 of file dns_cache.c.

dnsFlushCache()

void dnsFlushCache

(

NetInterface *

interface

)

Flush DNS cache.

Parameters

[in]

interface

Underlying network interface

Definition at line 75 of file dns_cache.c.

dnsInit()

error_t dnsInit

(

void

)

DNS cache initialization.

Returns

Error code

Definition at line 60 of file dns_cache.c.

dnsTick()

void dnsTick

(

void

)

DNS timer handler.

This routine must be periodically called by the TCP/IP stack to manage DNS cache

Definition at line 229 of file dns_cache.c.

Variable Documentation

dnsCache

DnsCacheEntry dnsCache[DNS_CACHE_SIZE]

Definition at line 52 of file dns_cache.c.

dnsTickCounter

systime_t dnsTickCounter

Definition at line 50 of file dns_cache.c.