mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-27 03:49:54 +00:00
132 lines
5.2 KiB
C
132 lines
5.2 KiB
C
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2017.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, distribute, and sell this
|
|
software and its documentation for any purpose is hereby granted
|
|
without fee, provided that the above copyright notice appear in
|
|
all copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of the author not be used in
|
|
advertising or publicity pertaining to distribution of the
|
|
software without specific, written prior permission.
|
|
|
|
The author disclaims all warranties with regard to this
|
|
software, including all implied warranties of merchantability
|
|
and fitness. In no event shall the author be liable for any
|
|
special, indirect or consequential damages or any damages
|
|
whatsoever resulting from loss of use, data or profits, whether
|
|
in an action of contract, negligence or other tortious action,
|
|
arising out of or in connection with the use or performance of
|
|
this software.
|
|
*/
|
|
|
|
/** \file
|
|
*
|
|
* Header file for DHCP.c.
|
|
*/
|
|
|
|
#ifndef _DHCP_H_
|
|
#define _DHCP_H_
|
|
|
|
/* Includes: */
|
|
#include <avr/io.h>
|
|
#include <string.h>
|
|
|
|
#include "EthernetProtocols.h"
|
|
#include "Ethernet.h"
|
|
#include "ProtocolDecoders.h"
|
|
|
|
/* Macros: */
|
|
/** DHCP operation constant, indicating a request from a host to a DHCP server. */
|
|
#define DHCP_OP_BOOTREQUEST 0x01
|
|
|
|
/** DHCP operation constant, indicating a reply from a DHCP server to a host. */
|
|
#define DHCP_OP_BOOTREPLY 0x02
|
|
|
|
/** Hardware type constant, indicating Ethernet as a carrier. */
|
|
#define DHCP_HTYPE_ETHERNET 0x01
|
|
|
|
/** Magic boot protocol "cookie", inserted into all BOOTP packets (BOOTP is the carrier of DHCP). */
|
|
#define DHCP_MAGIC_COOKIE 0x63825363
|
|
|
|
/** DHCP option list entry header, indicating that a subnet mask will follow. */
|
|
#define DHCP_OPTION_SUBNETMASK 1
|
|
|
|
/** DHCP option list entry header, indicating that the Lease Time will follow. */
|
|
#define DHCP_OPTION_LEASETIME 51
|
|
|
|
/** DHCP option list entry header, indicating that the DHCP message type constant will follow. */
|
|
#define DHCP_OPTION_MESSAGETYPE 53
|
|
|
|
/** DHCP option list entry header, indicating that the IP address of the DHCP server will follow. */
|
|
#define DHCP_OPTION_DHCPSERVER 54
|
|
|
|
/** DHCP option list entry header, used to pad out option data. */
|
|
#define DHCP_OPTION_PAD 0
|
|
|
|
/** DHCP option list entry header, indicating the end of option data. */
|
|
#define DHCP_OPTION_END 255
|
|
|
|
/** Message type constant, used in the DHCP option data field, requesting that a DHCP server offer an IP address. */
|
|
#define DHCP_MESSAGETYPE_DISCOVER 1
|
|
|
|
/** Message type constant, used in the DHCP option data field, indicating that a DHCP server is offering an IP address. */
|
|
#define DHCP_MESSAGETYPE_OFFER 2
|
|
|
|
/** Message type constant, used in the DHCP option data field, requesting that a DHCP server lease a given IP address. */
|
|
#define DHCP_MESSAGETYPE_REQUEST 3
|
|
|
|
/** Message type constant, used in the DHCP option data field, declining an offered DHCP server IP address lease. */
|
|
#define DHCP_MESSAGETYPE_DECLINE 4
|
|
|
|
/** Message type constant, used in the DHCP option data field, ACKing a host IP lease request. */
|
|
#define DHCP_MESSAGETYPE_ACK 5
|
|
|
|
/** Message type constant, used in the DHCP option data field, NACKing a host IP lease request. */
|
|
#define DHCP_MESSAGETYPE_NACK 6
|
|
|
|
/** Message type constant, used in the DHCP option data field, indicating that a host is releasing a leased IP address. */
|
|
#define DHCP_MESSAGETYPE_RELEASE 7
|
|
|
|
/* Type Defines: */
|
|
/** Type define for a DHCP packet inside an Ethernet frame. */
|
|
typedef struct
|
|
{
|
|
uint8_t Operation; /**< DHCP operation, either DHCP_OP_BOOTREQUEST or DHCP_OP_BOOTREPLY */
|
|
uint8_t HardwareType; /**< Hardware carrier type constant */
|
|
uint8_t HardwareAddressLength; /**< Length in bytes of a hardware (MAC) address on the network */
|
|
uint8_t Hops; /**< Number of hops required to reach the server, unused */
|
|
|
|
uint32_t TransactionID; /**< Unique ID of the DHCP packet, for positive matching between sent and received packets */
|
|
|
|
uint16_t ElapsedSeconds; /**< Elapsed seconds since the request was made */
|
|
uint16_t Flags; /**< BOOTP packet flags */
|
|
|
|
IP_Address_t ClientIP; /**< Client IP address, if already leased an IP */
|
|
IP_Address_t YourIP; /**< Client IP address */
|
|
IP_Address_t NextServerIP; /**< Legacy BOOTP protocol field, unused for DHCP */
|
|
IP_Address_t RelayAgentIP; /**< Legacy BOOTP protocol field, unused for DHCP */
|
|
|
|
uint8_t ClientHardwareAddress[16]; /**< Hardware (MAC) address of the client making a request to the DHCP server */
|
|
uint8_t ServerHostnameString[64]; /**< Legacy BOOTP protocol field, unused for DHCP */
|
|
uint8_t BootFileName[128]; /**< Legacy BOOTP protocol field, unused for DHCP */
|
|
|
|
uint32_t Cookie; /**< Magic BOOTP protocol cookie to indicate a valid packet */
|
|
} DHCP_Header_t;
|
|
|
|
/* Function Prototypes: */
|
|
int16_t DHCP_ProcessDHCPPacket(void* IPHeaderInStart,
|
|
void* DHCPHeaderInStart,
|
|
void* DHCPHeaderOutStart);
|
|
|
|
#endif
|
|
|