dhcp_client_fsm.c File Reference

DHCP client finite state machine. More...

#include "core/net.h"
#include "dhcp/dhcp_client.h"
#include "dhcp/dhcp_client_fsm.h"
#include "dhcp/dhcp_client_misc.h"
#include "mdns/mdns_responder.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   DHCP_TRACE_LEVEL

Functions
void	dhcpClientStateInit (DhcpClientContext *context)
	INIT state. More...
void	dhcpClientStateSelecting (DhcpClientContext *context)
	SELECTING state. More...
void	dhcpClientStateRequesting (DhcpClientContext *context)
	REQUESTING state. More...
void	dhcpClientStateInitReboot (DhcpClientContext *context)
	INIT-REBOOT state. More...
void	dhcpClientStateRebooting (DhcpClientContext *context)
	REBOOTING state. More...
void	dhcpClientStateProbing (DhcpClientContext *context)
	PROBING state. More...
void	dhcpClientStateAnnouncing (DhcpClientContext *context)
	ANNOUNCING state. More...
void	dhcpClientStateBound (DhcpClientContext *context)
	BOUND state. More...
void	dhcpClientStateRenewing (DhcpClientContext *context)
	RENEWING state. More...
void	dhcpClientStateRebinding (DhcpClientContext *context)
	REBINDING state. More...

Detailed Description

DHCP client finite state machine.

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 dhcp_client_fsm.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   DHCP_TRACE_LEVEL

Definition at line 32 of file dhcp_client_fsm.c.

Function Documentation

dhcpClientStateAnnouncing()

void dhcpClientStateAnnouncing

(

DhcpClientContext *

context

)

ANNOUNCING state.

The client announces its new IP address

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 430 of file dhcp_client_fsm.c.

dhcpClientStateBound()

void dhcpClientStateBound

(

DhcpClientContext *

context

)

BOUND state.

Client has a valid lease and is in its normal operating state

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 489 of file dhcp_client_fsm.c.

dhcpClientStateInit()

void dhcpClientStateInit

(

DhcpClientContext *

context

)

INIT state.

This is the initialization state, where a client begins the process of acquiring a lease. It also returns here when a lease ends, or when a lease negotiation fails

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 56 of file dhcp_client_fsm.c.

dhcpClientStateInitReboot()

void dhcpClientStateInitReboot

(

DhcpClientContext *

context

)

INIT-REBOOT state.

When a client that already has a valid lease starts up after a power-down or reboot, it starts here instead of the INIT state

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 241 of file dhcp_client_fsm.c.

dhcpClientStateProbing()

void dhcpClientStateProbing

(

DhcpClientContext *

context

)

PROBING state.

The client probes the newly received address

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 363 of file dhcp_client_fsm.c.

dhcpClientStateRebinding()

void dhcpClientStateRebinding

(

DhcpClientContext *

context

)

REBINDING state.

The client has failed to renew its lease with the server that originally granted it, and now seeks a lease extension with any server that can hear it. It periodically sends DHCPREQUEST messages with no server specified until it gets a reply or the lease ends

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 606 of file dhcp_client_fsm.c.

dhcpClientStateRebooting()

void dhcpClientStateRebooting

(

DhcpClientContext *

context

)

REBOOTING state.

A client that has rebooted with an assigned address is waiting for a confirming reply from a server

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 281 of file dhcp_client_fsm.c.

dhcpClientStateRenewing()

void dhcpClientStateRenewing

(

DhcpClientContext *

context

)

RENEWING state.

Client is trying to renew its lease. It regularly sends DHCPREQUEST messages with the server that gave it its current lease specified, and waits for a reply

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 535 of file dhcp_client_fsm.c.

dhcpClientStateRequesting()

void dhcpClientStateRequesting

(

DhcpClientContext *

context

)

REQUESTING state.

The client is waiting to hear back from the server to which it sent its request

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 161 of file dhcp_client_fsm.c.

dhcpClientStateSelecting()

void dhcpClientStateSelecting

(

DhcpClientContext *

context

)

SELECTING state.

The client is waiting to receive DHCPOFFER messages from one or more DHCP servers, so it can choose one

Parameters

[in]

context

Pointer to the DHCP client context

Definition at line 96 of file dhcp_client_fsm.c.