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/*********************************************************************
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*
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* ARP Server Module for Microchip TCP/IP Stack
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*
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*********************************************************************
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* FileName: ARPTsk.c
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* Dependencies: compiler.h
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* string.h
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* ARP.h
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* ARPTsk.h
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* Processor: PIC18
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* Complier: MCC18 v1.00.50 or higher
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* HITECH PICC-18 V8.10PL1 or higher
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* Company: Microchip Technology, Inc.
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*
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* Software License Agreement
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*
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* The software supplied herewith by Microchip Technology Incorporated
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* (the “Company”) for its PICmicro® Microcontroller is intended and
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* supplied to you, the Company’s customer, for use solely and
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* exclusively on Microchip PICmicro Microcontroller products. The
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* software is owned by the Company and/or its supplier, and is
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* protected under applicable copyright laws. All rights are reserved.
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* Any use in violation of the foregoing restrictions may subject the
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* user to criminal sanctions under applicable laws, as well as to
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* civil liability for the breach of the terms and conditions of this
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* license.
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*
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* THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
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* WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
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* TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
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* IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
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* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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* HiTech PICC18 Compiler Options excluding device selection:
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* -FAKELOCAL -G -Zg -E -C
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*
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*
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* Author Date Comment
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*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Nilesh Rajbharti 8/20/01 Original (Rev 1.0)
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* Nilesh Rajbharti 2/9/02 Cleanup
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* Nilesh Rajbharti 5/22/02 Rev 2.0 (See version.log for detail)
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********************************************************************/
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#include "compiler.h"
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#include <string.h>
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#include "arp.h"
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#include "arptsk.h"
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/*
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* ARP Task FSM States
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*/
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typedef enum _ARP_STATE
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{
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SM_ARP_IDLE,
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SM_ARP_REPLY
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} ARP_STATE;
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/*
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* This ARP task caches one ARP response.
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*/
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static ARP_STATE smARP;
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#ifdef STACK_CLIENT_MODE
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static NODE_INFO Cache;
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#endif
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/*********************************************************************
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* Function: void ARPInit(void)
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*
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* PreCondition: None
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*
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* Input: None
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*
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* Output: ARP Cache is initialized.
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*
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* Side Effects: None
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*
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* Overview: None
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*
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* Note: None
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********************************************************************/
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void ARPInit(void)
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{
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smARP = SM_ARP_IDLE;
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#ifdef STACK_CLIENT_MODE
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Cache.MACAddr.v[0] = 0xff;
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Cache.MACAddr.v[1] = 0xff;
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Cache.MACAddr.v[2] = 0xff;
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Cache.MACAddr.v[3] = 0xff;
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Cache.MACAddr.v[4] = 0xff;
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Cache.MACAddr.v[5] = 0xff;
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Cache.IPAddr.Val = 0x0;
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#endif
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}
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/*********************************************************************
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* Function: BOOL ARPProcess(void)
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*
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* PreCondition: ARP packet is ready in MAC buffer.
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*
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* Input: None
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*
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* Output: ARP FSM is executed.
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*
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* Side Effects: None
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*
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* Overview: None
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*
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* Note: None
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********************************************************************/
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BOOL ARPProcess(void)
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{
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NODE_INFO remoteNode;
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BYTE opCode;
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switch(smARP)
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{
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case SM_ARP_IDLE:
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if ( !ARPGet(&remoteNode, &opCode) )
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break;
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if ( opCode == ARP_REPLY )
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{
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#ifdef STACK_CLIENT_MODE
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Cache.MACAddr.v[0] = remoteNode.MACAddr.v[0];
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Cache.MACAddr.v[1] = remoteNode.MACAddr.v[1];
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Cache.MACAddr.v[2] = remoteNode.MACAddr.v[2];
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Cache.MACAddr.v[3] = remoteNode.MACAddr.v[3];
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Cache.MACAddr.v[4] = remoteNode.MACAddr.v[4];
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Cache.MACAddr.v[5] = remoteNode.MACAddr.v[5];
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Cache.IPAddr.Val = remoteNode.IPAddr.Val;
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#endif
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break;
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}
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else
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smARP = SM_ARP_REPLY;
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default:
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if ( ARPIsTxReady() )
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{
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ARPPut(&remoteNode, ARP_REPLY);
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smARP = SM_ARP_IDLE;
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}
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else
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return FALSE;
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break;
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}
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return TRUE;
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}
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/*********************************************************************
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* Function: void ARPResolve(IP_ADDR* IPAddr)
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*
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* PreCondition: None
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*
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* Input: IPAddr - IP Address to be resolved.
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*
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* Output: None
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*
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* Side Effects: None
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*
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* Overview: An ARP request is sent.
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*
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* Note: This function is available only when
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* STACK_CLIENT_MODE is defined.
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********************************************************************/
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#ifdef STACK_CLIENT_MODE
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void ARPResolve(IP_ADDR *IPAddr)
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{
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NODE_INFO remoteNode;
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remoteNode.IPAddr = *IPAddr;
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ARPPut(&remoteNode, ARP_REQUEST);
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}
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#endif
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/*********************************************************************
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* Function: BOOL ARPIsResolved(IP_ADDR* IPAddr,
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* MAC_ADDR *MACAddr)
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*
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* PreCondition: None
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*
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* Input: IPAddr - IPAddress to be resolved.
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* MACAddr - Buffer to hold corresponding
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* MAC Address.
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*
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* Output: TRUE if given IP Address has been resolved.
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* FALSE otherwise.
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*
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* Side Effects: None
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*
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* Overview: None
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*
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* Note: This function is available only when
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* STACK_CLIENT_MODE is defined.
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********************************************************************/
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#ifdef STACK_CLIENT_MODE
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BOOL ARPIsResolved(IP_ADDR *IPAddr, MAC_ADDR *MACAddr)
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{
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if ( (Cache.IPAddr.Val == IPAddr->Val) ||
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(Cache.IPAddr.v[0] == MY_GATE_BYTE1 &&
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Cache.IPAddr.v[1] == MY_GATE_BYTE2 &&
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Cache.IPAddr.v[2] == MY_GATE_BYTE3 &&
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Cache.IPAddr.v[3] == MY_GATE_BYTE4) )
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{
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*MACAddr = Cache.MACAddr;
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return TRUE;
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}
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return FALSE;
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}
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#endif
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