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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 | ||
8b9c5322 | 32 | #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ |
affae2bf | 33 | #ifndef CONFIG_NET_RETRY_COUNT |
8b9c5322 | 34 | #define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ |
affae2bf | 35 | #else |
8b9c5322 | 36 | #define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) |
affae2bf WD |
37 | #endif |
38 | ||
8b9c5322 | 39 | int RarpTry; |
affae2bf WD |
40 | |
41 | /* | |
42 | * Handle a RARP received packet. | |
43 | */ | |
594c26f8 | 44 | void rarp_receive(struct ip_udp_hdr *ip, unsigned len) |
affae2bf | 45 | { |
738853bb | 46 | struct arp_hdr *arp; |
8b9c5322 JH |
47 | |
48 | debug("Got RARP\n"); | |
738853bb | 49 | arp = (struct arp_hdr *)ip; |
8b9c5322 JH |
50 | if (len < ARP_HDR_SIZE) { |
51 | printf("bad length %d < %d\n", len, ARP_HDR_SIZE); | |
52 | return; | |
53 | } | |
54 | ||
55 | if ((ntohs(arp->ar_op) != RARPOP_REPLY) || | |
56 | (ntohs(arp->ar_hrd) != ARP_ETHER) || | |
57 | (ntohs(arp->ar_pro) != PROT_IP) || | |
58 | (arp->ar_hln != 6) || (arp->ar_pln != 4)) { | |
59 | ||
60 | puts("invalid RARP header\n"); | |
61 | } else { | |
62 | NetCopyIP(&NetOurIP, &arp->ar_data[16]); | |
63 | if (NetServerIP == 0) | |
64 | NetCopyIP(&NetServerIP, &arp->ar_data[6]); | |
65 | memcpy(NetServerEther, &arp->ar_data[0], 6); | |
66 | debug("Got good RARP\n"); | |
67 | net_auto_load(); | |
68 | } | |
affae2bf WD |
69 | } |
70 | ||
71 | ||
72 | /* | |
73 | * Timeout on BOOTP request. | |
74 | */ | |
8b9c5322 | 75 | static void RarpTimeout(void) |
affae2bf WD |
76 | { |
77 | if (RarpTry >= TIMEOUT_COUNT) { | |
c2faf4f9 JH |
78 | puts("\nRetry count exceeded; starting again\n"); |
79 | NetStartAgain(); | |
affae2bf | 80 | } else { |
c2faf4f9 JH |
81 | NetSetTimeout(TIMEOUT, RarpTimeout); |
82 | RarpRequest(); | |
affae2bf WD |
83 | } |
84 | } | |
85 | ||
86 | ||
8b9c5322 | 87 | void RarpRequest(void) |
affae2bf | 88 | { |
db288a96 | 89 | uchar *pkt; |
738853bb | 90 | struct arp_hdr *rarp; |
affae2bf WD |
91 | |
92 | printf("RARP broadcast %d\n", ++RarpTry); | |
93 | pkt = NetTxPacket; | |
94 | ||
a3d991bd | 95 | pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP); |
affae2bf | 96 | |
738853bb | 97 | rarp = (struct arp_hdr *)pkt; |
affae2bf | 98 | |
c2faf4f9 JH |
99 | rarp->ar_hrd = htons(ARP_ETHER); |
100 | rarp->ar_pro = htons(PROT_IP); | |
affae2bf WD |
101 | rarp->ar_hln = 6; |
102 | rarp->ar_pln = 4; | |
c2faf4f9 JH |
103 | rarp->ar_op = htons(RARPOP_REQUEST); |
104 | memcpy(&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */ | |
105 | memcpy(&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */ | |
106 | /* dest ET addr = source ET addr ??*/ | |
107 | memcpy(&rarp->ar_data[10], NetOurEther, 6); | |
8b9c5322 JH |
108 | /* dest IP addr set to broadcast */ |
109 | memset(&rarp->ar_data[16], 0xff, 4); | |
affae2bf | 110 | |
a3d991bd | 111 | NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE); |
affae2bf | 112 | |
49f3bdbb | 113 | NetSetTimeout(TIMEOUT, RarpTimeout); |
affae2bf | 114 | } |