Helper functions for DHCP server. More...

#include "core/net.h"
#include "dhcp/dhcp_server.h"
#include "dhcp/dhcp_server_misc.h"
#include "dhcp/dhcp_common.h"
#include "dhcp/dhcp_debug.h"
#include "date_time.h"
#include "debug.h"

Macros
#define	TRACE_LEVEL DHCP_TRACE_LEVEL

Functions
void	dhcpServerTick (DhcpServerContext *context)
	DHCP server timer handler. More...

void	dhcpServerProcessMessage (NetInterface interface, const IpPseudoHeader pseudoHeader, const UdpHeader udpHeader, const NetBuffer buffer, size_t offset, const NetRxAncillary ancillary, void param)
	Process incoming DHCP message. More...

void	dhcpServerParseDiscover (DhcpServerContext context, const DhcpMessage message, size_t length)
	Parse DHCPDISCOVER message. More...

void	dhcpServerParseRequest (DhcpServerContext context, const DhcpMessage message, size_t length)
	Parse DHCPREQUEST message. More...

void	dhcpServerParseDecline (DhcpServerContext context, const DhcpMessage message, size_t length)
	Parse DHCPDECLINE message. More...

void	dhcpServerParseRelease (DhcpServerContext context, const DhcpMessage message, size_t length)
	Parse DHCPRELEASE message. More...

void	dhcpServerParseInform (DhcpServerContext context, const DhcpMessage message, size_t length)
	Parse DHCPINFORM message. More...

error_t	dhcpServerSendReply (DhcpServerContext context, uint8_t type, Ipv4Addr yourIpAddr, const DhcpMessage request, size_t requestLen)
	Send DHCP reply message. More...

DhcpServerBinding *	dhcpServerCreateBinding (DhcpServerContext *context)
	Create a new binding. More...

DhcpServerBinding *	dhcpServerFindBindingByMacAddr (DhcpServerContext context, const MacAddr macAddr)
	Search the list of bindings for a given MAC address. More...

DhcpServerBinding *	dhcpServerFindBindingByIpAddr (DhcpServerContext *context, Ipv4Addr ipAddr)
	Search the list of bindings for a given IP address. More...

error_t	dhcpServerGetNextIpAddr (DhcpServerContext context, Ipv4Addr ipAddr)
	Retrieve the next IP address to be used. More...

Variables
systime_t	dhcpServerTickCounter

Detailed Description

Helper functions for DHCP server.

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 dhcp_server_misc.c.

Macro Definition Documentation

◆ TRACE_LEVEL

#define TRACE_LEVEL DHCP_TRACE_LEVEL

Definition at line 32 of file dhcp_server_misc.c.

Function Documentation

◆ dhcpServerCreateBinding()

DhcpServerBinding* dhcpServerCreateBinding ( DhcpServerContext * context )

Create a new binding.

Parameters

[in] context Pointer to the DHCP server context

Returns: Pointer to the newly created binding

Definition at line 798 of file dhcp_server_misc.c.

◆ dhcpServerFindBindingByIpAddr()

DhcpServerBinding* dhcpServerFindBindingByIpAddr	(	DhcpServerContext *	context,
		Ipv4Addr	ipAddr
	)

Search the list of bindings for a given IP address.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	ipAddr	IP address

Returns: Pointer to the corresponding DHCP binding

Definition at line 898 of file dhcp_server_misc.c.

◆ dhcpServerFindBindingByMacAddr()

DhcpServerBinding* dhcpServerFindBindingByMacAddr	(	DhcpServerContext *	context,
		const MacAddr *	macAddr
	)

Search the list of bindings for a given MAC address.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	macAddr	MAC address

Returns: Pointer to the corresponding DHCP binding

Definition at line 862 of file dhcp_server_misc.c.

◆ dhcpServerGetNextIpAddr()

error_t dhcpServerGetNextIpAddr	(	DhcpServerContext *	context,
		Ipv4Addr *	ipAddr
	)

Retrieve the next IP address to be used.

Parameters

[in]	context	Pointer to the DHCP server context
[out]	ipAddr	Next IP address to be used

Returns: Error code

Definition at line 934 of file dhcp_server_misc.c.

◆ dhcpServerParseDecline()

void dhcpServerParseDecline	(	DhcpServerContext *	context,
		const DhcpMessage *	message,
		size_t	length
	)

Parse DHCPDECLINE message.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	message	Pointer to the incoming DHCP message
[in]	length	Length of the incoming message to parse

Definition at line 488 of file dhcp_server_misc.c.

◆ dhcpServerParseDiscover()

void dhcpServerParseDiscover	(	DhcpServerContext *	context,
		const DhcpMessage *	message,
		size_t	length
	)

Parse DHCPDISCOVER message.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	message	Pointer to the incoming DHCP message
[in]	length	Length of the incoming message to parse

Definition at line 230 of file dhcp_server_misc.c.

◆ dhcpServerParseInform()

void dhcpServerParseInform	(	DhcpServerContext *	context,
		const DhcpMessage *	message,
		size_t	length
	)

Parse DHCPINFORM message.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	message	Pointer to the incoming DHCP message
[in]	length	Length of the incoming message to parse

Definition at line 556 of file dhcp_server_misc.c.

◆ dhcpServerParseRelease()

void dhcpServerParseRelease	(	DhcpServerContext *	context,
		const DhcpMessage *	message,
		size_t	length
	)

Parse DHCPRELEASE message.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	message	Pointer to the incoming DHCP message
[in]	length	Length of the incoming message to parse

Definition at line 528 of file dhcp_server_misc.c.

◆ dhcpServerParseRequest()

void dhcpServerParseRequest	(	DhcpServerContext *	context,
		const DhcpMessage *	message,
		size_t	length
	)

Parse DHCPREQUEST message.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	message	Pointer to the incoming DHCP message
[in]	length	Length of the incoming message to parse

Definition at line 364 of file dhcp_server_misc.c.

◆ dhcpServerProcessMessage()

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

Process incoming DHCP message.

Parameters

[in]	interface	Underlying network interface
[in]	pseudoHeader	UDP pseudo header
[in]	udpHeader	UDP header
[in]	buffer	Multi-part buffer containing the incoming DHCP message
[in]	offset	Offset to the first byte of the DHCP message
[in]	ancillary	Additional options passed to the stack along with the packet
[in]	param	Pointer to the DHCP server context

Definition at line 119 of file dhcp_server_misc.c.

◆ dhcpServerSendReply()

error_t dhcpServerSendReply	(	DhcpServerContext *	context,
		uint8_t	type,
		Ipv4Addr	yourIpAddr,
		const DhcpMessage *	request,
		size_t	requestLen
	)

Send DHCP reply message.

Parameters

[in]	context	Pointer to the DHCP server context
[in]	type	DHCP message type (DHCPOFFER, DHCPACK or DHCPNAK)
[in]	yourIpAddr	The IP address to be placed in the 'yiaddr' field
[in]	request	Pointer to DHCP message received from the client
[in]	requestLen	Length of the DHCP message received from the client

Returns: Error code

Definition at line 580 of file dhcp_server_misc.c.

◆ dhcpServerTick()

void dhcpServerTick ( DhcpServerContext * context )

DHCP server timer handler.

This routine must be periodically called by the TCP/IP stack to manage DHCP server operation

Parameters

[in] context Pointer to the DHCP server context

Definition at line 59 of file dhcp_server_misc.c.

Variable Documentation

◆ dhcpServerTickCounter

systime_t dhcpServerTickCounter

Definition at line 47 of file dhcp_server_misc.c.

Macros

Functions

Variables

Detailed Description

License

Macro Definition Documentation

◆ TRACE_LEVEL

Function Documentation

◆ dhcpServerCreateBinding()

◆ dhcpServerFindBindingByIpAddr()

◆ dhcpServerFindBindingByMacAddr()

◆ dhcpServerGetNextIpAddr()

◆ dhcpServerParseDecline()

◆ dhcpServerParseDiscover()

◆ dhcpServerParseInform()

◆ dhcpServerParseRelease()

◆ dhcpServerParseRequest()

◆ dhcpServerProcessMessage()

◆ dhcpServerSendReply()

◆ dhcpServerTick()

Variable Documentation

◆ dhcpServerTickCounter