llmnr_responder.c File Reference

LLMNR responder (Link-Local Multicast Name Resolution) More...

#include "core/net.h"
#include "ipv4/ipv4_multicast.h"
#include "ipv6/ipv6_multicast.h"
#include "llmnr/llmnr_responder.h"
#include "dns/dns_debug.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   LLMNR_TRACE_LEVEL

Functions
error_t	llmnrResponderInit (NetInterface *interface)
	LLMNR responder initialization. More...
void	llmnrProcessQuery (NetInterface *interface, const IpPseudoHeader *pseudoHeader, const UdpHeader *udpHeader, const NetBuffer *buffer, size_t offset, const NetRxAncillary *ancillary, void *param)
	Process LLMNR query message. More...
error_t	llmnrSendResponse (NetInterface *interface, const IpAddr *destIpAddr, uint16_t destPort, uint16_t id, uint16_t qtype, uint16_t qclass)
	Send LLMNR response message. More...
error_t	llmnrFormatIpv4AddrRecord (NetInterface *interface, LlmnrHeader *message, size_t *length, Ipv4Addr ipv4Addr)
	Format A resource record. More...
error_t	llmnrFormatIpv6AddrRecord (NetInterface *interface, LlmnrHeader *message, size_t *length, const Ipv6Addr *ipv6Addr)
	Format AAAA resource record. More...

Detailed Description

LLMNR responder (Link-Local Multicast Name Resolution)

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

2.4.4

Definition in file llmnr_responder.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   LLMNR_TRACE_LEVEL

Definition at line 32 of file llmnr_responder.c.

Function Documentation

llmnrFormatIpv4AddrRecord()

error_t llmnrFormatIpv4AddrRecord	(	NetInterface *	interface,
		LlmnrHeader *	message,
		size_t *	length,
		Ipv4Addr	ipv4Addr
	)

Format A resource record.

Parameters

[in]	interface	Underlying network interface
[in]	message	Pointer to the LLMNR message
[in,out]	length	Actual length of the LLMNR message, in bytes
[in]	ipv4Addr	IPv4 address to be added

Returns

Error code

Definition at line 415 of file llmnr_responder.c.

llmnrFormatIpv6AddrRecord()

error_t llmnrFormatIpv6AddrRecord	(	NetInterface *	interface,
		LlmnrHeader *	message,
		size_t *	length,
		const Ipv6Addr *	ipv6Addr
	)

Format AAAA resource record.

Parameters

[in]	interface	Underlying network interface
[in]	message	Pointer to the LLMNR message
[in,out]	length	Actual length of the LLMNR message, in bytes
[in]	ipv6Addr	IPv6 address to be added

Returns

Error code

Definition at line 475 of file llmnr_responder.c.

llmnrProcessQuery()

void llmnrProcessQuery	(	NetInterface *	interface,
		const IpPseudoHeader *	pseudoHeader,
		const UdpHeader *	udpHeader,
		const NetBuffer *	buffer,
		size_t	offset,
		const NetRxAncillary *	ancillary,
		void *	param
	)

Process LLMNR query message.

Parameters

[in]	interface	Underlying network interface
[in]	pseudoHeader	UDP pseudo header
[in]	udpHeader	UDP header
[in]	buffer	Multi-part buffer containing the incoming LLMNR message
[in]	offset	Offset to the first byte of the LLMNR message
[in]	ancillary	Additional options passed to the stack along with the packet
[in]	param	Callback function parameter (not used)

Definition at line 96 of file llmnr_responder.c.

llmnrResponderInit()

error_t llmnrResponderInit

(

NetInterface *

interface

)

LLMNR responder initialization.

Parameters

[in]

interface

Underlying network interface

Returns

Error code

Definition at line 52 of file llmnr_responder.c.

llmnrSendResponse()

error_t llmnrSendResponse	(	NetInterface *	interface,
		const IpAddr *	destIpAddr,
		uint16_t	destPort,
		uint16_t	id,
		uint16_t	qtype,
		uint16_t	qclass
	)

Send LLMNR response message.

Parameters

[in]	interface	Underlying network interface
[in]	destIpAddr	Destination IP address
[in]	destPort	destination port
[in]	id	16-bit identifier to be used when sending LLMNR query
[in]	qtype	Resource record type
[in]	qclass	Resource record class

Definition at line 236 of file llmnr_responder.c.