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> 27 #include "bootp.h" 28 #include "rarp.h" 29 #include "tftp.h" 30 31 #if (CONFIG_COMMANDS & CFG_CMD_NET) 32 33 #define TIMEOUT 5 /* Seconds before trying BOOTP again */ 34 #ifndef CONFIG_NET_RETRY_COUNT 35 # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ 36 #else 37 # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) 38 #endif 39 40 41 int RarpTry; 42 43 /* 44 * Handle a RARP received packet. 45 */ 46 static void 47 RarpHandler(uchar * dummi0, unsigned dummi1, unsigned dummi2, unsigned dummi3) 48 { 49 #ifdef DEBUG 50 printf("Got good RARP\n"); 51 #endif 52 TftpStart (); 53 } 54 55 56 /* 57 * Timeout on BOOTP request. 58 */ 59 static void 60 RarpTimeout(void) 61 { 62 if (RarpTry >= TIMEOUT_COUNT) { 63 puts ("\nRetry count exceeded; starting again\n"); 64 NetStartAgain (); 65 } else { 66 NetSetTimeout (TIMEOUT * CFG_HZ, RarpTimeout); 67 RarpRequest (); 68 } 69 } 70 71 72 void 73 RarpRequest (void) 74 { 75 int i; 76 volatile uchar *pkt; 77 ARP_t * rarp; 78 79 printf("RARP broadcast %d\n", ++RarpTry); 80 pkt = NetTxPacket; 81 82 NetSetEther(pkt, NetBcastAddr, PROT_RARP); 83 pkt += ETHER_HDR_SIZE; 84 85 rarp = (ARP_t *)pkt; 86 87 rarp->ar_hrd = ARP_ETHER; 88 rarp->ar_pro = PROT_IP; 89 rarp->ar_hln = 6; 90 rarp->ar_pln = 4; 91 rarp->ar_op = RARPOP_REQUEST; 92 memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */ 93 memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */ 94 memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/ 95 /* dest. IP addr set to broadcast */ 96 for (i = 0; i <= 3; i++) { 97 rarp->ar_data[16 + i] = 0xff; 98 } 99 100 NetSendPacket(NetTxPacket, ETHER_HDR_SIZE + ARP_HDR_SIZE); 101 102 NetSetTimeout(TIMEOUT * CFG_HZ, RarpTimeout); 103 NetSetHandler(RarpHandler); 104 } 105 106 #endif /* CFG_CMD_NET */ 107