160 lines
5.5 KiB
C
160 lines
5.5 KiB
C
/*
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LUFA Library
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Copyright (C) Dean Camera, 2017.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaims all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Header file for common DHCP defines.
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*/
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#ifndef _DHCP_COMMON_H_
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#define _DHCP_COMMON_H_
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/* Includes: */
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include "Config/AppConfig.h"
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#include <uip.h>
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/* Macros: */
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/** UDP listen port for a BOOTP server. */
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#define DHCP_SERVER_PORT 67
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/** UDP listen port for a BOOTP client. */
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#define DHCP_CLIENT_PORT 68
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/** BOOTP message type for a BOOTP REQUEST message. */
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#define DHCP_OP_BOOTREQUEST 0x01
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/** BOOTP message type for a BOOTP REPLY message. */
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#define DHCP_OP_BOOTREPLY 0x02
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/** BOOTP flag for a BOOTP broadcast message. */
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#define BOOTP_BROADCAST 0x8000
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/** Magic DHCP cookie for a BOOTP message to identify it as a DHCP message. */
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#define DHCP_MAGIC_COOKIE 0x63538263
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/** Unique transaction ID used to identify DHCP responses to the client. */
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#define DHCP_TRANSACTION_ID 0x13245466
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/** DHCP message type for a DISCOVER message. */
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#define DHCP_DISCOVER 1
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/** DHCP message type for an OFFER message. */
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#define DHCP_OFFER 2
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/** DHCP message type for a REQUEST message. */
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#define DHCP_REQUEST 3
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/** DHCP message type for a DECLINE message. */
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#define DHCP_DECLINE 4
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/** DHCP message type for an ACK message. */
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#define DHCP_ACK 5
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/** DHCP message type for a NAK message. */
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#define DHCP_NAK 6
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/** DHCP message type for a RELEASE message. */
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#define DHCP_RELEASE 7
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/** DHCP medium type for standard Ethernet. */
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#define DHCP_HTYPE_ETHERNET 1
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/** DHCP message option for the network subnet mask. */
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#define DHCP_OPTION_SUBNET_MASK 1
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/** DHCP message option for the network gateway IP. */
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#define DHCP_OPTION_ROUTER 3
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/** DHCP message option for the network DNS server. */
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#define DHCP_OPTION_DNS_SERVER 6
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/** DHCP message option for the requested client IP address. */
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#define DHCP_OPTION_REQ_IPADDR 50
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/** DHCP message option for the IP address lease time. */
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#define DHCP_OPTION_LEASE_TIME 51
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/** DHCP message option for the DHCP message type. */
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#define DHCP_OPTION_MSG_TYPE 53
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/** DHCP message option for the DHCP server IP. */
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#define DHCP_OPTION_SERVER_ID 54
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/** DHCP message option for the list of required options from the server. */
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#define DHCP_OPTION_REQ_LIST 55
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/** DHCP message option for the options list terminator. */
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#define DHCP_OPTION_END 255
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/* Type Defines: */
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/** Type define for a DHCP packet inside an Ethernet frame. */
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typedef struct
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{
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uint8_t Operation; /**< DHCP operation, either DHCP_OP_BOOTREQUEST or DHCP_OP_BOOTREPLY */
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uint8_t HardwareType; /**< Hardware carrier type constant */
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uint8_t HardwareAddressLength; /**< Length in bytes of a hardware (MAC) address on the network */
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uint8_t Hops; /**< Number of hops required to reach the server, unused */
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uint32_t TransactionID; /**< Unique ID of the DHCP packet, for positive matching between sent and received packets */
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uint16_t ElapsedSeconds; /**< Elapsed seconds since the request was made */
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uint16_t Flags; /**< BOOTP packet flags */
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uip_ipaddr_t ClientIP; /**< Client IP address, if already leased an IP */
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uip_ipaddr_t YourIP; /**< Client IP address */
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uip_ipaddr_t NextServerIP; /**< Legacy BOOTP protocol field, unused for DHCP */
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uip_ipaddr_t RelayAgentIP; /**< Legacy BOOTP protocol field, unused for DHCP */
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uint8_t ClientHardwareAddress[16]; /**< Hardware (MAC) address of the client making a request to the DHCP server */
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uint8_t ServerHostnameString[64]; /**< Legacy BOOTP protocol field, unused for DHCP */
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uint8_t BootFileName[128]; /**< Legacy BOOTP protocol field, unused for DHCP */
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uint32_t Cookie; /**< Magic BOOTP protocol cookie to indicate a valid packet */
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uint8_t Options[]; /**< DHCP message options */
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} DHCP_Header_t;
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/* Function Prototypes: */
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uint8_t DHCPCommon_SetOption(uint8_t* DHCPOptionList,
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const uint8_t Option,
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const uint8_t DataLen,
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void* const OptionData);
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bool DHCPCommon_GetOption(const uint8_t* DHCPOptionList,
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const uint8_t Option,
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void* const Destination);
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#endif
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