// DSWifi Project - sgIP Internet Protocol Stack Implementation
// Copyright (C) 2005-2006 Stephen Stair - sgstair@akkit.org - http://www.akkit.org
/****************************************************************************** 
DSWifi Lib and test materials are licenced under the MIT open source licence:
Copyright (c) 2005-2006 Stephen Stair

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/
#ifndef SGIP_ARP_H
#define SGIP_ARP_H

#include "sgIP_Config.h"
#include "sgIP_memblock.h"
#include "sgIP_Hub.h"

#define SGIP_ARP_FLAG_ACTIVE		0x0001
#define SGIP_ARP_FLAG_HAVEHWADDR	0x0002

typedef struct SGIP_ARP_RECORD {
	unsigned short flags, retrycount;
	unsigned long idletime;
	sgIP_Hub_HWInterface * linked_interface;
	sgIP_memblock * queued_packet;
	int linked_protocol;
	unsigned long protocol_address;
	char hw_address[SGIP_MAXHWADDRLEN];
} sgIP_ARP_Record;


typedef struct SGIP_HEADER_ARP {
	unsigned short hwspace;		// ethernet=1;
	unsigned short protocol;
	unsigned char hw_addr_len;
	unsigned char protocol_addr_len;
	unsigned short opcode;		// request=1, reply=2
	unsigned char addresses[8+12]; // sender HW, sender Protocol, dest HW, dest Protocol
} sgIP_Header_ARP;

#define SGIP_HEADER_ARP_BASESIZE	8

#ifdef __cplusplus
extern "C" {
#endif

	extern void	sgIP_ARP_Init();
	extern void sgIP_ARP_Timer100ms();
	extern void sgIP_ARP_FlushInterface(sgIP_Hub_HWInterface * hw);

	extern int sgIP_ARP_ProcessIPFrame(sgIP_Hub_HWInterface * hw, sgIP_memblock * mb);
	extern int sgIP_ARP_ProcessARPFrame(sgIP_Hub_HWInterface * hw, sgIP_memblock * mb);
	extern int sgIP_ARP_SendProtocolFrame(sgIP_Hub_HWInterface * hw, sgIP_memblock * mb, unsigned short protocol, unsigned long destaddr);
	
	extern int sgIP_ARP_SendARPResponse(sgIP_Hub_HWInterface * hw, sgIP_memblock * mb);
	extern int sgIP_ARP_SendGratARP(sgIP_Hub_HWInterface * hw);
	extern int sgIP_ARP_SendARPRequest(sgIP_Hub_HWInterface * hw, int protocol, unsigned long protocol_addr);
	


#ifdef __cplusplus
};
#endif


#endif