[people/ms/u-boot.git] / net / rarp.c

/*
 * (C) Copyright 2000-2002
 * 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 <command.h>
#include <net.h>
#include "nfs.h"
#include "bootp.h"
#include "rarp.h"
#include "tftp.h"

#define TIMEOUT		5000UL	/* Milliseconds before trying BOOTP again */
#ifndef	CONFIG_NET_RETRY_COUNT
# define TIMEOUT_COUNT	5		/* # of timeouts before giving up  */
#else
# define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT)
#endif


int		RarpTry;

/*
 *	Handle a RARP received packet.
 */
static void
RarpHandler(uchar *dummi0, unsigned dummi1, IPaddr_t sip, unsigned dummi2,
	    unsigned dummi3)
{
	debug("Got good RARP\n");
	net_auto_load();
}


/*
 *	Timeout on BOOTP request.
 */
static void
RarpTimeout(void)
{
	if (RarpTry >= TIMEOUT_COUNT) {
		puts("\nRetry count exceeded; starting again\n");
		NetStartAgain();
	} else {
		NetSetTimeout(TIMEOUT, RarpTimeout);
		RarpRequest();
	}
}


void
RarpRequest(void)
{
	int i;
	uchar *pkt;
	ARP_t *rarp;

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

	pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);

	rarp = (ARP_t *)pkt;

	rarp->ar_hrd = htons(ARP_ETHER);
	rarp->ar_pro = htons(PROT_IP);
	rarp->ar_hln = 6;
	rarp->ar_pln = 4;
	rarp->ar_op  = htons(RARPOP_REQUEST);
	memcpy(&rarp->ar_data[0],  NetOurEther, 6);	/* source ET addr */
	memcpy(&rarp->ar_data[6],  &NetOurIP,   4);	/* source IP addr */
	/* dest ET addr = source ET addr ??*/
	memcpy(&rarp->ar_data[10], NetOurEther, 6);
	/* dest. IP addr set to broadcast */
	for (i = 0; i <= 3; i++)
		rarp->ar_data[16 + i] = 0xff;

	NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);

	NetSetTimeout(TIMEOUT, RarpTimeout);
	NetSetHandler(RarpHandler);
}
Commit	Line	Data
affae2bf WD	1	/*
	2	* (C) Copyright 2000-2002
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <command.h>
	26	#include <net.h>
c40b2956	27	#include "nfs.h"
affae2bf WD	28	#include "bootp.h"
	29	#include "rarp.h"
	30	#include "tftp.h"
	31
49f3bdbb	32	#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
affae2bf WD	33	#ifndef CONFIG_NET_RETRY_COUNT
	34	# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
	35	#else
	36	# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
	37	#endif
	38
	39
	40	int RarpTry;
	41
	42	/*
	43	* Handle a RARP received packet.
	44	*/
	45	static void
03eb129f LC	46	RarpHandler(uchar *dummi0, unsigned dummi1, IPaddr_t sip, unsigned dummi2,
03eb129f LC	47	unsigned dummi3)
affae2bf	48	{
0ebf04c6	49	debug("Got good RARP\n");
e4a3d57d	50	net_auto_load();
affae2bf WD	51	}
	52
	53
	54	/*
	55	* Timeout on BOOTP request.
	56	*/
	57	static void
	58	RarpTimeout(void)
	59	{
	60	if (RarpTry >= TIMEOUT_COUNT) {
c2faf4f9 JH	61	puts("\nRetry count exceeded; starting again\n");
c2faf4f9 JH	62	NetStartAgain();
affae2bf	63	} else {
c2faf4f9 JH	64	NetSetTimeout(TIMEOUT, RarpTimeout);
c2faf4f9 JH	65	RarpRequest();
affae2bf WD	66	}
	67	}
	68
	69
	70	void
c2faf4f9	71	RarpRequest(void)
affae2bf WD	72	{
affae2bf WD	73	int i;
db288a96	74	uchar *pkt;
c2faf4f9	75	ARP_t *rarp;
affae2bf WD	76
	77	printf("RARP broadcast %d\n", ++RarpTry);
	78	pkt = NetTxPacket;
	79
a3d991bd	80	pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
affae2bf WD	81
	82	rarp = (ARP_t *)pkt;
	83
c2faf4f9 JH	84	rarp->ar_hrd = htons(ARP_ETHER);
c2faf4f9 JH	85	rarp->ar_pro = htons(PROT_IP);
affae2bf WD	86	rarp->ar_hln = 6;
affae2bf WD	87	rarp->ar_pln = 4;
c2faf4f9 JH	88	rarp->ar_op = htons(RARPOP_REQUEST);
	89	memcpy(&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
	90	memcpy(&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
	91	/* dest ET addr = source ET addr ??*/
	92	memcpy(&rarp->ar_data[10], NetOurEther, 6);
affae2bf	93	/* dest. IP addr set to broadcast */
c2faf4f9	94	for (i = 0; i <= 3; i++)
affae2bf	95	rarp->ar_data[16 + i] = 0xff;
affae2bf	96
a3d991bd	97	NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
affae2bf	98
49f3bdbb	99	NetSetTimeout(TIMEOUT, RarpTimeout);
affae2bf WD	100	NetSetHandler(RarpHandler);
affae2bf WD	101	}