PIC/Demo%20trimmet/ARPTsk.c

/*********************************************************************
 *
 *                  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 "Compiler.h"
#include <string.h>

#include "ARP.h"
#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

1	/*********************************************************************
2	*
3	* ARP Server Module for Microchip TCP/IP Stack
4	*
5	*********************************************************************
6	* FileName: ARPTsk.c
7	* Dependencies: Compiler.h
8	* string.h
9	* ARP.h
10	* ARPTsk.h
11	* Processor: PIC18, PIC24F, PIC24H, dsPIC30F, dsPIC33F
12	* Complier: Microchip C18 v3.02 or higher
13	* Microchip C30 v2.01 or higher
14	* Company: Microchip Technology, Inc.
15	*
16	* Software License Agreement
17	*
18	* This software is owned by Microchip Technology Inc. ("Microchip")
19	* and is supplied to you for use exclusively as described in the
20	* associated software agreement. This software is protected by
21	* software and other intellectual property laws. Any use in
22	* violation of the software license may subject the user to criminal
23	* sanctions as well as civil liability. Copyright 2006 Microchip
24	* Technology Inc. All rights reserved.
25	*
26	* This software is provided "AS IS." MICROCHIP DISCLAIMS ALL
27	* WARRANTIES, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, NOT LIMITED
28	* TO MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
29	* INFRINGEMENT. Microchip shall in no event be liable for special,
30	* incidental, or consequential damages.
31	*
32	*
33	* Author Date Comment
34	*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
35	* Nilesh Rajbharti 8/20/01 Original (Rev 1.0)
36	* Nilesh Rajbharti 2/9/02 Cleanup
37	* Nilesh Rajbharti 5/22/02 Rev 2.0 (See version.log for detail)
38	********************************************************************/
39
40	#include "Compiler.h"
41	#include <string.h>
42
43	#include "ARP.h"
44	#include "ARPTsk.h"
45
46	/*
47	* ARP Task FSM States
48	*/
49	typedef enum _ARP_STATE
50	{
51	SM_ARP_IDLE,
52	SM_ARP_REPLY
53	} ARP_STATE;
54
55
56	/*
57	* This ARP task caches one ARP response.
58	*/
59	static ARP_STATE smARP;
60
61	#ifdef STACK_CLIENT_MODE
62	static NODE_INFO Cache;
63	#endif
64
65
66	/*********************************************************************
67	* Function: void ARPInit(void)
68	*
69	* PreCondition: None
70	*
71	* Input: None
72	*
73	* Output: ARP Cache is initialized.
74	*
75	* Side Effects: None
76	*
77	* Overview: None
78	*
79	* Note: None
80	********************************************************************/
81	void ARPInit(void)
82	{
83	smARP = SM_ARP_IDLE;
84
85	#ifdef STACK_CLIENT_MODE
86	Cache.MACAddr.v[0] = 0xff;
87	Cache.MACAddr.v[1] = 0xff;
88	Cache.MACAddr.v[2] = 0xff;
89	Cache.MACAddr.v[3] = 0xff;
90	Cache.MACAddr.v[4] = 0xff;
91	Cache.MACAddr.v[5] = 0xff;
92
93	Cache.IPAddr.Val = 0x0;
94	#endif
95	}
96
97
98
99	/*********************************************************************
100	* Function: BOOL ARPProcess(void)
101	*
102	* PreCondition: ARP packet is ready in MAC buffer.
103	*
104	* Input: None
105	*
106	* Output: ARP FSM is executed.
107	*
108	* Side Effects: None
109	*
110	* Overview: None
111	*
112	* Note: None
113	********************************************************************/
114	BOOL ARPProcess(void)
115	{
116	NODE_INFO remoteNode;
117	BYTE opCode;
118
119	switch(smARP)
120	{
121	case SM_ARP_IDLE:
122	if ( !ARPGet(&remoteNode, &opCode) )
123	break;
124
125	if ( opCode == ARP_REPLY )
126	{
127	#ifdef STACK_CLIENT_MODE
128	Cache.MACAddr = remoteNode.MACAddr;
129	Cache.IPAddr.Val = remoteNode.IPAddr.Val;
130	#endif
131	break;
132	}
133	else
134	smARP = SM_ARP_REPLY;
135
136	default:
137	if(ARPPut(&remoteNode, ARP_REPLY))
138	{
139	smARP = SM_ARP_IDLE;
140	}
141	else
142	return FALSE;
143	break;
144	}
145	return TRUE;
146	}
147
148
149	/*********************************************************************
150	* Function: void ARPResolve(IP_ADDR* IPAddr)
151	*
152	* PreCondition: MACIsTxReady(TRUE) returns TRUE
153	*
154	* Input: IPAddr - IP Address to be resolved.
155	*
156	* Output: None
157	*
158	* Side Effects: None
159	*
160	* Overview: An ARP request is sent.
161	*
162	* Note: This function is available only when
163	* STACK_CLIENT_MODE is defined.
164	********************************************************************/
165	#ifdef STACK_CLIENT_MODE
166	void ARPResolve(IP_ADDR *IPAddr)
167	{
168	NODE_INFO remoteNode;
169
170	remoteNode.IPAddr = *IPAddr;
171
172	ARPPut(&remoteNode, ARP_REQUEST);
173	}
174	#endif
175
176
177
178	/*********************************************************************
179	* Function: BOOL ARPIsResolved(IP_ADDR* IPAddr,
180	* MAC_ADDR *MACAddr)
181	*
182	* PreCondition: None
183	*
184	* Input: IPAddr - IPAddress to be resolved.
185	* MACAddr - Buffer to hold corresponding
186	* MAC Address.
187	*
188	* Output: TRUE if given IP Address has been resolved.
189	* FALSE otherwise.
190	*
191	* Side Effects: None
192	*
193	* Overview: None
194	*
195	* Note: This function is available only when
196	* STACK_CLIENT_MODE is defined.
197	********************************************************************/
198	#ifdef STACK_CLIENT_MODE
199	BOOL ARPIsResolved(IP_ADDR IPAddr, MAC_ADDR MACAddr)
200	{
201	if(Cache.IPAddr.Val == IPAddr->Val \|\| Cache.IPAddr.Val == AppConfig.MyGateway.Val)
202	{
203	*MACAddr = Cache.MACAddr;
204	return TRUE;
205	}
206	return FALSE;
207	}
208	#endif
209