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/*

 * (C) Copyright 2000

 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.

 *

 * See file CREDITS for list of people who contributed to this

 * project.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 of

 * the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,

 * MA 02111-1307 USA

 */

#include "common.h"

#include "net.h"

#include "bootp.h"

#include "rarp.h"

#include "tftp.h"

#if (CONFIG_COMMANDS & CFG_CMD_NET)

#define TIMEOUT         5       /* Seconds before trying BOOTP again */

#define TIMEOUT_COUNT   1       /* # of timeouts before giving up    */

int RarpTry;

/*

 *      Handle a RARP received packet.

 */

static void

RarpHandler(uchar * dummi0, unsigned dummi1, unsigned dummi2, unsigned dummi3)

{

#ifdef  DEBUG

        printf("Got good RARP\n");

#endif

        TftpStart();

}

/*

 *      Timeout on BOOTP request.

 */

static void RarpTimeout(void)

{

        if (RarpTry >= TIMEOUT_COUNT) {

                puts("\nRetry count exceeded; starting again\n");

                NetStartAgain();

        } else {

                NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);

                RarpRequest();

        }

}

void RarpRequest(void)

{

        int i;

        volatile uchar *pkt;

        ARP_t *rarp;

        printf("RARP broadcast %d\n", ++RarpTry);

        pkt = NetTxPacket;

        NetSetEther(pkt, NetBcastAddr, PROT_RARP);

        pkt += ETHER_HDR_SIZE;

        rarp = (ARP_t *) pkt;

        rarp->ar_hrd = ARP_ETHER;

        rarp->ar_pro = PROT_IP;

        rarp->ar_hln = 6;

        rarp->ar_pln = 4;

        rarp->ar_op = RARPOP_REQUEST;

        NetCopyEther(&rarp->ar_data[0], NetOurEther);    /* source ET addr */

        *(IPaddr_t *) (&rarp->ar_data[6]) = NetOurIP;   /* source IP addr */

        NetCopyEther(&rarp->ar_data[10], NetOurEther);  /* dest ET addr = source ET addr ?? */

        /* dest. IP addr set to broadcast */

        for (i = 0; i <= 3; i++) {

                rarp->ar_data[16 + i] = 0xff;

        }

        NetSendPacket(NetTxPacket, ETHER_HDR_SIZE + ARP_HDR_SIZE);

        NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout);

        NetSetHandler(RarpHandler);

}

#endif /* CFG_CMD_NET */