Helper functions for mDNS responder. More...

#include "core/net.h"
#include "mdns/mdns_responder.h"
#include "mdns/mdns_responder_misc.h"
#include "dns_sd/dns_sd_responder.h"
#include "dns_sd/dns_sd_responder_misc.h"
#include "debug.h"

Macros
#define	TRACE_LEVEL MDNS_TRACE_LEVEL

Functions
void	mdnsResponderChangeState (MdnsResponderContext *context, MdnsState newState, systime_t delay)
	Update FSM state. More...

void	mdnsResponderChangeHostname (MdnsResponderContext *context)
	Programmatically change the host name. More...

error_t	mdnsResponderSendProbe (MdnsResponderContext *context)
	Send probe packet. More...

error_t	mdnsResponderSendAnnouncement (MdnsResponderContext *context)
	Send announcement packet. More...

error_t	mdnsResponderSendGoodbye (MdnsResponderContext *context)
	Send goodbye packet. More...

void	mdnsResponderProcessQuery (NetInterface interface, MdnsMessage query)
	Process mDNS query message. More...

error_t	mdnsResponderParseQuestion (NetInterface interface, const MdnsMessage query, size_t offset, const DnsQuestion question, MdnsMessage response)
	Parse a question. More...

void	mdnsResponderParseKnownAnRecord (NetInterface interface, const MdnsMessage query, size_t queryOffset, const DnsResourceRecord queryRecord, MdnsMessage response)
	Parse a resource record from the Known-Answer Section. More...

void	mdnsResponderParseAnRecord (NetInterface interface, const MdnsMessage response, size_t offset, const DnsResourceRecord *record)
	Parse a resource record from the Answer Section. More...

void	mdnsResponderParseNsRecords (MdnsResponderContext context, const MdnsMessage query, size_t offset)
	Parse the Authority Section. More...

void	mdnsResponderGenerateAdditionalRecords (MdnsResponderContext context, MdnsMessage response, bool_t legacyUnicast)
	Generate additional records. More...

error_t	mdnsResponderGenerateIpv4AddrRecords (MdnsResponderContext context, MdnsMessage message, bool_t cacheFlush, uint32_t ttl)
	Generate A resource records. More...

error_t	mdnsResponderGenerateIpv6AddrRecords (MdnsResponderContext context, MdnsMessage message, bool_t cacheFlush, uint32_t ttl)
	Generate AAAA resource records. More...

error_t	mdnsResponderGenerateIpv4PtrRecords (MdnsResponderContext context, MdnsMessage message, bool_t cacheFlush, uint32_t ttl)
	Generate reverse address mapping PTR resource record (IPv4) More...

error_t	mdnsResponderGenerateIpv6PtrRecords (MdnsResponderContext context, MdnsMessage message, bool_t cacheFlush, uint32_t ttl)
	Generate reverse address mapping PTR resource record (IPv6) More...

error_t	mdnsResponderFormatIpv4AddrRecord (MdnsResponderContext context, MdnsMessage message, const uint8_t *ipv4Addr, bool_t cacheFlush, uint32_t ttl)
	Format A resource record. More...

error_t	mdnsResponderFormatIpv6AddrRecord (MdnsResponderContext context, MdnsMessage message, const uint8_t *ipv6Addr, bool_t cacheFlush, uint32_t ttl)
	Format AAAA resource record. More...

error_t	mdnsResponderFormatIpv4PtrRecord (MdnsResponderContext context, MdnsMessage message, const char_t *reverseName, bool_t cacheFlush, uint32_t ttl)
	Format reverse address mapping PTR resource record (IPv4) More...

error_t	mdnsResponderFormatIpv6PtrRecord (MdnsResponderContext context, MdnsMessage message, const char_t *reverseName, bool_t cacheFlush, uint32_t ttl)
	Format reverse address mapping PTR resource record (IPv6) More...

error_t	mdnsResponderFormatNsecRecord (MdnsResponderContext context, MdnsMessage message, bool_t cacheFlush, uint32_t ttl)
	Format NSEC resource record. More...

DnsResourceRecord *	mdnsResponderGetNextHostRecord (MdnsResponderContext context, DnsResourceRecord record)
	Sort the host records in lexicographical order. More...

DnsResourceRecord *	mdnsResponderGetNextTiebreakerRecord (MdnsResponderContext context, const MdnsMessage query, size_t offset, DnsResourceRecord *record)
	Sort the tiebreaker records in lexicographical order. More...

Detailed Description

Helper functions for mDNS responder.

License

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

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 mdns_responder_misc.c.

Macro Definition Documentation

◆ TRACE_LEVEL

#define TRACE_LEVEL MDNS_TRACE_LEVEL

Definition at line 32 of file mdns_responder_misc.c.

Function Documentation

◆ mdnsResponderChangeHostname()

void mdnsResponderChangeHostname ( MdnsResponderContext * context )

Programmatically change the host name.

Parameters

[in] context Pointer to the mDNS responder context

Definition at line 88 of file mdns_responder_misc.c.

◆ mdnsResponderChangeState()

void mdnsResponderChangeState	(	MdnsResponderContext *	context,
		MdnsState	newState,
		systime_t	delay
	)

Update FSM state.

Parameters

[in]	context	Pointer to the mDNS responder context
[in]	newState	New state to switch to
[in]	delay	Initial delay

Definition at line 53 of file mdns_responder_misc.c.

◆ mdnsResponderFormatIpv4AddrRecord()

error_t mdnsResponderFormatIpv4AddrRecord	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		const uint8_t *	ipv4Addr,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Format A resource record.

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	ipv4Addr	Pointer to the IPv4 address
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1581 of file mdns_responder_misc.c.

◆ mdnsResponderFormatIpv4PtrRecord()

error_t mdnsResponderFormatIpv4PtrRecord	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		const char_t *	reverseName,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Format reverse address mapping PTR resource record (IPv4)

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	reverseName	Domain name for reverse DNS lookup
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1737 of file mdns_responder_misc.c.

◆ mdnsResponderFormatIpv6AddrRecord()

error_t mdnsResponderFormatIpv6AddrRecord	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		const uint8_t *	ipv6Addr,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Format AAAA resource record.

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	ipv6Addr	Pointer to the IPv6 address
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1659 of file mdns_responder_misc.c.

◆ mdnsResponderFormatIpv6PtrRecord()

error_t mdnsResponderFormatIpv6PtrRecord	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		const char_t *	reverseName,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Format reverse address mapping PTR resource record (IPv6)

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	reverseName	Domain name for reverse DNS lookup
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1827 of file mdns_responder_misc.c.

◆ mdnsResponderFormatNsecRecord()

error_t mdnsResponderFormatNsecRecord	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Format NSEC resource record.

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1916 of file mdns_responder_misc.c.

◆ mdnsResponderGenerateAdditionalRecords()

void mdnsResponderGenerateAdditionalRecords	(	MdnsResponderContext *	context,
		MdnsMessage *	response,
		bool_t	legacyUnicast
	)

Generate additional records.

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	response	mDNS response message
[in]	legacyUnicast	This flag is set for legacy unicast responses

Definition at line 1245 of file mdns_responder_misc.c.

◆ mdnsResponderGenerateIpv4AddrRecords()

error_t mdnsResponderGenerateIpv4AddrRecords	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Generate A resource records.

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1420 of file mdns_responder_misc.c.

◆ mdnsResponderGenerateIpv4PtrRecords()

error_t mdnsResponderGenerateIpv4PtrRecords	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Generate reverse address mapping PTR resource record (IPv4)

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1500 of file mdns_responder_misc.c.

◆ mdnsResponderGenerateIpv6AddrRecords()

error_t mdnsResponderGenerateIpv6AddrRecords	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Generate AAAA resource records.

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1460 of file mdns_responder_misc.c.

◆ mdnsResponderGenerateIpv6PtrRecords()

error_t mdnsResponderGenerateIpv6PtrRecords	(	MdnsResponderContext *	context,
		MdnsMessage *	message,
		bool_t	cacheFlush,
		uint32_t	ttl
	)

Generate reverse address mapping PTR resource record (IPv6)

Parameters

[in]	context	Pointer to the mDNS responder context
[in,out]	message	Pointer to the mDNS message
[in]	cacheFlush	Cache-flush bit
[in]	ttl	Resource record TTL (cache lifetime)

Returns: Error code

Definition at line 1540 of file mdns_responder_misc.c.

◆ mdnsResponderGetNextHostRecord()

DnsResourceRecord* mdnsResponderGetNextHostRecord	(	MdnsResponderContext *	context,
		DnsResourceRecord *	record
	)

Sort the host records in lexicographical order.

Parameters

[in]	context	Pointer to the mDNS responder context
[in]	record	Pointer to the current record

Returns: Pointer to the next record, if any

Definition at line 2031 of file mdns_responder_misc.c.

◆ mdnsResponderGetNextTiebreakerRecord()

DnsResourceRecord* mdnsResponderGetNextTiebreakerRecord	(	MdnsResponderContext *	context,
		const MdnsMessage *	query,
		size_t	offset,
		DnsResourceRecord *	record
	)

Sort the tiebreaker records in lexicographical order.

Parameters

[in]	context	Pointer to the mDNS responder context
[in]	query	Incoming mDNS query message
[in]	offset	Offset to first byte of the Authority Section
[in]	record	Pointer to the current record

Returns: Pointer to the next record, if any

Definition at line 2128 of file mdns_responder_misc.c.

◆ mdnsResponderParseAnRecord()

void mdnsResponderParseAnRecord	(	NetInterface *	interface,
		const MdnsMessage *	response,
		size_t	offset,
		const DnsResourceRecord *	record
	)

Parse a resource record from the Answer Section.

Parameters

[in]	interface	Underlying network interface
[in]	response	Incoming mDNS response message
[in]	offset	Offset to first byte of the resource record to be checked
[in]	record	Pointer to the resource record

Definition at line 940 of file mdns_responder_misc.c.

◆ mdnsResponderParseKnownAnRecord()

void mdnsResponderParseKnownAnRecord	(	NetInterface *	interface,
		const MdnsMessage *	query,
		size_t	queryOffset,
		const DnsResourceRecord *	queryRecord,
		MdnsMessage *	response
	)

Parse a resource record from the Known-Answer Section.

Parameters

[in]	interface	Underlying network interface
[in]	query	Incoming mDNS query message
[in]	queryOffset	Offset to first byte of the resource record
[in]	queryRecord	Pointer to the resource record
[in,out]	response	mDNS response message

Definition at line 849 of file mdns_responder_misc.c.

◆ mdnsResponderParseNsRecords()

void mdnsResponderParseNsRecords	(	MdnsResponderContext *	context,
		const MdnsMessage *	query,
		size_t	offset
	)

Parse the Authority Section.

Parameters

[in]	context	Pointer to the mDNS responder context
[in]	query	Incoming mDNS query message
[in]	offset	Offset to first byte of the Authority Section

Definition at line 1160 of file mdns_responder_misc.c.

◆ mdnsResponderParseQuestion()

error_t mdnsResponderParseQuestion	(	NetInterface *	interface,
		const MdnsMessage *	query,
		size_t	offset,
		const DnsQuestion *	question,
		MdnsMessage *	response
	)

Parse a question.

Parameters

[in]	interface	Underlying network interface
[in]	query	Incoming mDNS query message
[in]	offset	Offset to first byte of the question
[in]	question	Pointer to the question
[in,out]	response	mDNS response message

Returns: Error code

Definition at line 642 of file mdns_responder_misc.c.

◆ mdnsResponderProcessQuery()

void mdnsResponderProcessQuery	(	NetInterface *	interface,
		MdnsMessage *	query
	)

Process mDNS query message.

Parameters

[in]	interface	Underlying network interface
[in]	query	Incoming mDNS query message

Definition at line 353 of file mdns_responder_misc.c.

◆ mdnsResponderSendAnnouncement()

error_t mdnsResponderSendAnnouncement ( MdnsResponderContext * context )

Send announcement packet.

Parameters

[in] context Pointer to the mDNS responder context

Returns: Error code

Definition at line 225 of file mdns_responder_misc.c.

◆ mdnsResponderSendGoodbye()

error_t mdnsResponderSendGoodbye ( MdnsResponderContext * context )

Send goodbye packet.

Parameters

[in] context Pointer to the mDNS responder context

Returns: Error code

Definition at line 291 of file mdns_responder_misc.c.

◆ mdnsResponderSendProbe()

error_t mdnsResponderSendProbe ( MdnsResponderContext * context )

Send probe packet.

Parameters

[in] context Pointer to the mDNS responder context

Returns: Error code

Definition at line 150 of file mdns_responder_misc.c.

Macros

Functions

Detailed Description

License

Macro Definition Documentation

◆ TRACE_LEVEL

Function Documentation

◆ mdnsResponderChangeHostname()

◆ mdnsResponderChangeState()

◆ mdnsResponderFormatIpv4AddrRecord()

◆ mdnsResponderFormatIpv4PtrRecord()

◆ mdnsResponderFormatIpv6AddrRecord()

◆ mdnsResponderFormatIpv6PtrRecord()

◆ mdnsResponderFormatNsecRecord()

◆ mdnsResponderGenerateAdditionalRecords()

◆ mdnsResponderGenerateIpv4AddrRecords()

◆ mdnsResponderGenerateIpv4PtrRecords()

◆ mdnsResponderGenerateIpv6AddrRecords()

◆ mdnsResponderGenerateIpv6PtrRecords()

◆ mdnsResponderGetNextHostRecord()

◆ mdnsResponderGetNextTiebreakerRecord()

◆ mdnsResponderParseAnRecord()

◆ mdnsResponderParseKnownAnRecord()

◆ mdnsResponderParseNsRecords()

◆ mdnsResponderParseQuestion()

◆ mdnsResponderProcessQuery()

◆ mdnsResponderSendAnnouncement()

◆ mdnsResponderSendGoodbye()

◆ mdnsResponderSendProbe()