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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> | |
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 | ||
7a8e9bed WD |
87 | rarp->ar_hrd = htons (ARP_ETHER); |
88 | rarp->ar_pro = htons (PROT_IP); | |
affae2bf WD |
89 | rarp->ar_hln = 6; |
90 | rarp->ar_pln = 4; | |
7a8e9bed | 91 | rarp->ar_op = htons (RARPOP_REQUEST); |
affae2bf WD |
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 */ |