[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)
{
	char *s;
	debug("Got good RARP\n");
	if ((s = getenv("autoload")) != NULL) {
		if (*s == 'n') {
			/*
			 * Just use RARP to configure system;
			 * Do not use TFTP/NFS to to load the bootfile.
			 */
			NetState = NETLOOP_SUCCESS;
			return;
#if defined(CONFIG_CMD_NFS)
		} else if ((s != NULL) && !strcmp(s, "NFS")) {
			NfsStart();
			return;
#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, RarpTimeout);
		RarpRequest ();
	}
}


void
RarpRequest (void)
{
	int i;
	volatile 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 */
	memcpy (&rarp->ar_data[10], NetOurEther, 6);	/* 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, (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	{
c40b2956	49	char *s;
0ebf04c6	50	debug("Got good RARP\n");
0e6d798c WD	51	if ((s = getenv("autoload")) != NULL) {
	52	if (*s == 'n') {
	53	/*
	54	* Just use RARP to configure system;
	55	* Do not use TFTP/NFS to to load the bootfile.
	56	*/
	57	NetState = NETLOOP_SUCCESS;
	58	return;
643d1ab2	59	#if defined(CONFIG_CMD_NFS)
0e6d798c WD	60	} else if ((s != NULL) && !strcmp(s, "NFS")) {
	61	NfsStart();
	62	return;
	63	#endif
	64	}
c40b2956	65	}
affae2bf WD	66	TftpStart ();
	67	}
	68
	69
	70	/*
	71	* Timeout on BOOTP request.
	72	*/
	73	static void
	74	RarpTimeout(void)
	75	{
	76	if (RarpTry >= TIMEOUT_COUNT) {
	77	puts ("\nRetry count exceeded; starting again\n");
	78	NetStartAgain ();
	79	} else {
49f3bdbb	80	NetSetTimeout (TIMEOUT, RarpTimeout);
affae2bf WD	81	RarpRequest ();
	82	}
	83	}
	84
	85
	86	void
	87	RarpRequest (void)
	88	{
	89	int i;
	90	volatile uchar *pkt;
	91	ARP_t * rarp;
	92
	93	printf("RARP broadcast %d\n", ++RarpTry);
	94	pkt = NetTxPacket;
	95
a3d991bd	96	pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
affae2bf WD	97
	98	rarp = (ARP_t *)pkt;
	99
7a8e9bed WD	100	rarp->ar_hrd = htons (ARP_ETHER);
7a8e9bed WD	101	rarp->ar_pro = htons (PROT_IP);
affae2bf WD	102	rarp->ar_hln = 6;
affae2bf WD	103	rarp->ar_pln = 4;
7a8e9bed	104	rarp->ar_op = htons (RARPOP_REQUEST);
affae2bf WD	105	memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
	106	memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
	107	memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
	108	/* dest. IP addr set to broadcast */
	109	for (i = 0; i <= 3; i++) {
	110	rarp->ar_data[16 + i] = 0xff;
	111	}
	112
a3d991bd	113	NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
affae2bf	114
49f3bdbb	115	NetSetTimeout(TIMEOUT, RarpTimeout);
affae2bf WD	116	NetSetHandler(RarpHandler);
affae2bf WD	117	}