/*********************************************************************
*
* ARP Server Module for Microchip TCP/IP Stack
*
*********************************************************************
* FileName: ARPTsk.c
* Dependencies: Compiler.h
* string.h
* ARP.h
* ARPTsk.h
* Processor: PIC18, PIC24F, PIC24H, dsPIC30F, dsPIC33F
* Complier: Microchip C18 v3.02 or higher
* Microchip C30 v2.01 or higher
* Company: Microchip Technology, Inc.
*
* Software License Agreement
*
* This software is owned by Microchip Technology Inc. ("Microchip")
* and is supplied to you for use exclusively as described in the
* associated software agreement. This software is protected by
* software and other intellectual property laws. Any use in
* violation of the software license may subject the user to criminal
* sanctions as well as civil liability. Copyright 2006 Microchip
* Technology Inc. All rights reserved.
*
* This software is provided "AS IS." MICROCHIP DISCLAIMS ALL
* WARRANTIES, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, NOT LIMITED
* TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* INFRINGEMENT. Microchip shall in no event be liable for special,
* incidental, or consequential damages.
*
*
* Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Nilesh Rajbharti 8/20/01 Original (Rev 1.0)
* Nilesh Rajbharti 2/9/02 Cleanup
* Nilesh Rajbharti 5/22/02 Rev 2.0 (See version.log for detail)
********************************************************************/
#include "..\Include\Compiler.h"
#include <string.h>
#include "..\Include\ARP.h"
#include "..\Include\ARPTsk.h"
/*
* ARP Task FSM States
*/
typedef enum _ARP_STATE
{
SM_ARP_IDLE,
SM_ARP_REPLY
} ARP_STATE;
/*
* This ARP task caches one ARP response.
*/
static ARP_STATE smARP;
#ifdef STACK_CLIENT_MODE
static NODE_INFO Cache;
#endif
/*********************************************************************
* Function: void ARPInit(void)
*
* PreCondition: None
*
* Input: None
*
* Output: ARP Cache is initialized.
*
* Side Effects: None
*
* Overview: None
*
* Note: None
********************************************************************/
void ARPInit(void)
{
smARP = SM_ARP_IDLE;
#ifdef STACK_CLIENT_MODE
Cache.MACAddr.v[0] = 0xff;
Cache.MACAddr.v[1] = 0xff;
Cache.MACAddr.v[2] = 0xff;
Cache.MACAddr.v[3] = 0xff;
Cache.MACAddr.v[4] = 0xff;
Cache.MACAddr.v[5] = 0xff;
Cache.IPAddr.Val = 0x0;
#endif
}
/*********************************************************************
* Function: BOOL ARPProcess(void)
*
* PreCondition: ARP packet is ready in MAC buffer.
*
* Input: None
*
* Output: ARP FSM is executed.
*
* Side Effects: None
*
* Overview: None
*
* Note: None
********************************************************************/
BOOL ARPProcess(void)
{
NODE_INFO remoteNode;
BYTE opCode;
switch(smARP)
{
case SM_ARP_IDLE:
if ( !ARPGet(&remoteNode, &opCode) )
break;
if ( opCode == ARP_REPLY )
{
#ifdef STACK_CLIENT_MODE
Cache.MACAddr = remoteNode.MACAddr;
Cache.IPAddr.Val = remoteNode.IPAddr.Val;
#endif
break;
}
else
smARP = SM_ARP_REPLY;
default:
if(ARPPut(&remoteNode, ARP_REPLY))
{
smARP = SM_ARP_IDLE;
}
else
return FALSE;
break;
}
return TRUE;
}
/*********************************************************************
* Function: void ARPResolve(IP_ADDR* IPAddr)
*
* PreCondition: MACIsTxReady(TRUE) returns TRUE
*
* Input: IPAddr - IP Address to be resolved.
*
* Output: None
*
* Side Effects: None
*
* Overview: An ARP request is sent.
*
* Note: This function is available only when
* STACK_CLIENT_MODE is defined.
********************************************************************/
#ifdef STACK_CLIENT_MODE
void ARPResolve(IP_ADDR *IPAddr)
{
NODE_INFO remoteNode;
remoteNode.IPAddr = *IPAddr;
ARPPut(&remoteNode, ARP_REQUEST);
}
#endif
/*********************************************************************
* Function: BOOL ARPIsResolved(IP_ADDR* IPAddr,
* MAC_ADDR *MACAddr)
*
* PreCondition: None
*
* Input: IPAddr - IPAddress to be resolved.
* MACAddr - Buffer to hold corresponding
* MAC Address.
*
* Output: TRUE if given IP Address has been resolved.
* FALSE otherwise.
*
* Side Effects: None
*
* Overview: None
*
* Note: This function is available only when
* STACK_CLIENT_MODE is defined.
********************************************************************/
#ifdef STACK_CLIENT_MODE
BOOL ARPIsResolved(IP_ADDR *IPAddr, MAC_ADDR *MACAddr)
{
if(Cache.IPAddr.Val == IPAddr->Val || Cache.IPAddr.Val == AppConfig.MyGateway.Val)
{
*MACAddr = Cache.MACAddr;
return TRUE;
}
return FALSE;
}
#endif