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wdenk3861aa52002-09-27 23:19:37 +00001/*
2 * Based on LiMon - BOOTP.
3 *
4 * Copyright 1994, 1995, 2000 Neil Russell.
5 * (See License)
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
wdenk232c1502004-03-12 00:14:09 +00008 * Copyright 2000-2004 Wolfgang Denk, wd@denx.de
wdenk3861aa52002-09-27 23:19:37 +00009 */
10
11#if 0
wdenk232c1502004-03-12 00:14:09 +000012#define DEBUG 1 /* general debug */
13#define DEBUG_BOOTP_EXT 1 /* Debug received vendor fields */
wdenk3861aa52002-09-27 23:19:37 +000014#endif
15
16#ifdef DEBUG_BOOTP_EXT
17#define debug_ext(fmt,args...) printf (fmt ,##args)
18#else
19#define debug_ext(fmt,args...)
20#endif
21
22#include <common.h>
23#include <command.h>
24#include <net.h>
25#include "bootp.h"
26#include "tftp.h"
wdenk232c1502004-03-12 00:14:09 +000027#include "nfs.h"
wdenk3861aa52002-09-27 23:19:37 +000028#ifdef CONFIG_STATUS_LED
29#include <status_led.h>
30#endif
31
wdenk232c1502004-03-12 00:14:09 +000032#define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
wdenk3861aa52002-09-27 23:19:37 +000033
Jon Loeliger643d1ab2007-07-09 17:45:14 -050034#if defined(CONFIG_CMD_NET)
wdenk3861aa52002-09-27 23:19:37 +000035
Jean-Christophe PLAGNIOL-VILLARD079c2c42007-11-17 11:31:10 +010036#define TIMEOUT 5UL /* Seconds before trying BOOTP again */
wdenk232c1502004-03-12 00:14:09 +000037#ifndef CONFIG_NET_RETRY_COUNT
wdenk3861aa52002-09-27 23:19:37 +000038# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
39#else
wdenk232c1502004-03-12 00:14:09 +000040# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
wdenk3861aa52002-09-27 23:19:37 +000041#endif
42
43#define PORT_BOOTPS 67 /* BOOTP server UDP port */
44#define PORT_BOOTPC 68 /* BOOTP client UDP port */
45
46#ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
wdenk232c1502004-03-12 00:14:09 +000047#define CONFIG_DHCP_MIN_EXT_LEN 64
wdenk3861aa52002-09-27 23:19:37 +000048#endif
49
50ulong BootpID;
51int BootpTry;
52#ifdef CONFIG_BOOTP_RANDOM_DELAY
53ulong seed1, seed2;
54#endif
55
Jon Loeliger643d1ab2007-07-09 17:45:14 -050056#if defined(CONFIG_CMD_DHCP)
wdenk3861aa52002-09-27 23:19:37 +000057dhcp_state_t dhcp_state = INIT;
wdenk682011f2003-06-03 23:54:09 +000058unsigned long dhcp_leasetime = 0;
stroese759a51b2003-04-10 13:26:44 +000059IPaddr_t NetDHCPServerIP = 0;
wdenk3861aa52002-09-27 23:19:37 +000060static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len);
61
62/* For Debug */
wdenk3e386912003-04-05 00:53:31 +000063#if 0
64static char *dhcpmsg2str(int type)
wdenk3861aa52002-09-27 23:19:37 +000065{
66 switch (type) {
wdenk232c1502004-03-12 00:14:09 +000067 case 1: return "DHCPDISCOVER"; break;
68 case 2: return "DHCPOFFER"; break;
69 case 3: return "DHCPREQUEST"; break;
70 case 4: return "DHCPDECLINE"; break;
71 case 5: return "DHCPACK"; break;
72 case 6: return "DHCPNACK"; break;
73 case 7: return "DHCPRELEASE"; break;
wdenk3861aa52002-09-27 23:19:37 +000074 default: return "UNKNOWN/INVALID MSG TYPE"; break;
75 }
76}
wdenk3e386912003-04-05 00:53:31 +000077#endif
wdenk3861aa52002-09-27 23:19:37 +000078
Jon Loeliger1fe80d72007-07-09 22:08:34 -050079#if defined(CONFIG_BOOTP_VENDOREX)
wdenk3861aa52002-09-27 23:19:37 +000080extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */
81extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */
82#endif
83
Jon Loeliger610f2e92007-07-10 11:05:02 -050084#endif
wdenk3861aa52002-09-27 23:19:37 +000085
86static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len)
87{
88 Bootp_t *bp = (Bootp_t *) pkt;
89 int retval = 0;
90
91 if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
92 retval = -1;
93 else if (len < sizeof (Bootp_t) - OPT_SIZE)
94 retval = -2;
95 else if (bp->bp_op != OP_BOOTREQUEST &&
96 bp->bp_op != OP_BOOTREPLY &&
97 bp->bp_op != DHCP_OFFER &&
98 bp->bp_op != DHCP_ACK &&
99 bp->bp_op != DHCP_NAK ) {
100 retval = -3;
101 }
102 else if (bp->bp_htype != HWT_ETHER)
103 retval = -4;
104 else if (bp->bp_hlen != HWL_ETHER)
105 retval = -5;
106 else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) {
107 retval = -6;
108 }
109
110 debug ("Filtering pkt = %d\n", retval);
111
112 return retval;
113}
114
115/*
116 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
117 */
wdenk3e386912003-04-05 00:53:31 +0000118static void BootpCopyNetParams(Bootp_t *bp)
wdenk3861aa52002-09-27 23:19:37 +0000119{
wdenk3d3befa2004-03-14 15:06:13 +0000120 IPaddr_t tmp_ip;
121
wdenk3861aa52002-09-27 23:19:37 +0000122 NetCopyIP(&NetOurIP, &bp->bp_yiaddr);
Wilson Callan5d110f02007-07-28 10:56:13 -0400123#if !defined(CONFIG_BOOTP_SERVERIP)
wdenk3d3befa2004-03-14 15:06:13 +0000124 NetCopyIP(&tmp_ip, &bp->bp_siaddr);
125 if (tmp_ip != 0)
126 NetCopyIP(&NetServerIP, &bp->bp_siaddr);
wdenk3861aa52002-09-27 23:19:37 +0000127 memcpy (NetServerEther, ((Ethernet_t *)NetRxPkt)->et_src, 6);
Wilson Callan5d110f02007-07-28 10:56:13 -0400128#endif
wdenk3d3befa2004-03-14 15:06:13 +0000129 if (strlen(bp->bp_file) > 0)
130 copy_filename (BootFile, bp->bp_file, sizeof(BootFile));
wdenk3861aa52002-09-27 23:19:37 +0000131
132 debug ("Bootfile: %s\n", BootFile);
133
134 /* Propagate to environment:
wdenk8bde7f72003-06-27 21:31:46 +0000135 * don't delete exising entry when BOOTP / DHCP reply does
wdenk3861aa52002-09-27 23:19:37 +0000136 * not contain a new value
137 */
138 if (*BootFile) {
139 setenv ("bootfile", BootFile);
140 }
141}
142
143static int truncate_sz (const char *name, int maxlen, int curlen)
144{
145 if (curlen >= maxlen) {
146 printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n",
147 name, curlen, maxlen);
148 curlen = maxlen - 1;
149 }
150 return (curlen);
151}
152
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500153#if !defined(CONFIG_CMD_DHCP)
wdenk3861aa52002-09-27 23:19:37 +0000154
wdenk232c1502004-03-12 00:14:09 +0000155static void BootpVendorFieldProcess (u8 * ext)
wdenk3861aa52002-09-27 23:19:37 +0000156{
wdenk232c1502004-03-12 00:14:09 +0000157 int size = *(ext + 1);
wdenk3861aa52002-09-27 23:19:37 +0000158
wdenk232c1502004-03-12 00:14:09 +0000159 debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
160 *(ext + 1));
wdenk3861aa52002-09-27 23:19:37 +0000161
wdenk232c1502004-03-12 00:14:09 +0000162 NetBootFileSize = 0;
wdenk3861aa52002-09-27 23:19:37 +0000163
wdenk232c1502004-03-12 00:14:09 +0000164 switch (*ext) {
165 /* Fixed length fields */
166 case 1: /* Subnet mask */
wdenk3861aa52002-09-27 23:19:37 +0000167 if (NetOurSubnetMask == 0)
wdenk232c1502004-03-12 00:14:09 +0000168 NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2));
wdenk3861aa52002-09-27 23:19:37 +0000169 break;
wdenk232c1502004-03-12 00:14:09 +0000170 case 2: /* Time offset - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000171 break;
wdenk232c1502004-03-12 00:14:09 +0000172 /* Variable length fields */
173 case 3: /* Gateways list */
wdenk3861aa52002-09-27 23:19:37 +0000174 if (NetOurGatewayIP == 0) {
wdenk232c1502004-03-12 00:14:09 +0000175 NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2));
wdenk3861aa52002-09-27 23:19:37 +0000176 }
177 break;
wdenk232c1502004-03-12 00:14:09 +0000178 case 4: /* Time server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000179 break;
wdenk232c1502004-03-12 00:14:09 +0000180 case 5: /* IEN-116 name server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000181 break;
182 case 6:
183 if (NetOurDNSIP == 0) {
wdenk232c1502004-03-12 00:14:09 +0000184 NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2));
wdenk3861aa52002-09-27 23:19:37 +0000185 }
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500186#if defined(CONFIG_BOOTP_DNS2)
stroesefe389a82003-08-28 14:17:32 +0000187 if ((NetOurDNS2IP == 0) && (size > 4)) {
wdenk232c1502004-03-12 00:14:09 +0000188 NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4));
stroesefe389a82003-08-28 14:17:32 +0000189 }
190#endif
wdenk3861aa52002-09-27 23:19:37 +0000191 break;
wdenk232c1502004-03-12 00:14:09 +0000192 case 7: /* Log server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000193 break;
wdenk232c1502004-03-12 00:14:09 +0000194 case 8: /* Cookie/Quote server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000195 break;
wdenk232c1502004-03-12 00:14:09 +0000196 case 9: /* LPR server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000197 break;
wdenk232c1502004-03-12 00:14:09 +0000198 case 10: /* Impress server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000199 break;
wdenk232c1502004-03-12 00:14:09 +0000200 case 11: /* RPL server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000201 break;
wdenk232c1502004-03-12 00:14:09 +0000202 case 12: /* Host name */
wdenk3861aa52002-09-27 23:19:37 +0000203 if (NetOurHostName[0] == 0) {
wdenk232c1502004-03-12 00:14:09 +0000204 size = truncate_sz ("Host Name", sizeof (NetOurHostName), size);
205 memcpy (&NetOurHostName, ext + 2, size);
206 NetOurHostName[size] = 0;
wdenk3861aa52002-09-27 23:19:37 +0000207 }
208 break;
wdenk232c1502004-03-12 00:14:09 +0000209 case 13: /* Boot file size */
wdenk3861aa52002-09-27 23:19:37 +0000210 if (size == 2)
wdenk232c1502004-03-12 00:14:09 +0000211 NetBootFileSize = ntohs (*(ushort *) (ext + 2));
wdenk3861aa52002-09-27 23:19:37 +0000212 else if (size == 4)
wdenk232c1502004-03-12 00:14:09 +0000213 NetBootFileSize = ntohl (*(ulong *) (ext + 2));
wdenk3861aa52002-09-27 23:19:37 +0000214 break;
wdenk232c1502004-03-12 00:14:09 +0000215 case 14: /* Merit dump file - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000216 break;
wdenk232c1502004-03-12 00:14:09 +0000217 case 15: /* Domain name - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000218 break;
wdenk232c1502004-03-12 00:14:09 +0000219 case 16: /* Swap server - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000220 break;
wdenk232c1502004-03-12 00:14:09 +0000221 case 17: /* Root path */
wdenk3861aa52002-09-27 23:19:37 +0000222 if (NetOurRootPath[0] == 0) {
wdenk232c1502004-03-12 00:14:09 +0000223 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size);
224 memcpy (&NetOurRootPath, ext + 2, size);
225 NetOurRootPath[size] = 0;
wdenk3861aa52002-09-27 23:19:37 +0000226 }
227 break;
wdenk232c1502004-03-12 00:14:09 +0000228 case 18: /* Extension path - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000229 /*
wdenk8bde7f72003-06-27 21:31:46 +0000230 * This can be used to send the information of the
231 * vendor area in another file that the client can
232 * access via TFTP.
wdenk3861aa52002-09-27 23:19:37 +0000233 */
234 break;
wdenk232c1502004-03-12 00:14:09 +0000235 /* IP host layer fields */
236 case 40: /* NIS Domain name */
wdenk3861aa52002-09-27 23:19:37 +0000237 if (NetOurNISDomain[0] == 0) {
wdenk232c1502004-03-12 00:14:09 +0000238 size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size);
239 memcpy (&NetOurNISDomain, ext + 2, size);
240 NetOurNISDomain[size] = 0;
wdenk3861aa52002-09-27 23:19:37 +0000241 }
242 break;
wdenk232c1502004-03-12 00:14:09 +0000243 /* Application layer fields */
244 case 43: /* Vendor specific info - Not yet supported */
wdenk3861aa52002-09-27 23:19:37 +0000245 /*
wdenk8bde7f72003-06-27 21:31:46 +0000246 * Binary information to exchange specific
247 * product information.
wdenk3861aa52002-09-27 23:19:37 +0000248 */
249 break;
wdenk232c1502004-03-12 00:14:09 +0000250 /* Reserved (custom) fields (128..254) */
251 }
wdenk3861aa52002-09-27 23:19:37 +0000252}
253
wdenk232c1502004-03-12 00:14:09 +0000254static void BootpVendorProcess (u8 * ext, int size)
wdenk3861aa52002-09-27 23:19:37 +0000255{
wdenk232c1502004-03-12 00:14:09 +0000256 u8 *end = ext + size;
wdenk3861aa52002-09-27 23:19:37 +0000257
wdenk232c1502004-03-12 00:14:09 +0000258 debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size);
wdenk3861aa52002-09-27 23:19:37 +0000259
wdenk232c1502004-03-12 00:14:09 +0000260 while ((ext < end) && (*ext != 0xff)) {
261 if (*ext == 0) {
262 ext++;
263 } else {
264 u8 *opt = ext;
265
266 ext += ext[1] + 2;
267 if (ext <= end)
268 BootpVendorFieldProcess (opt);
269 }
wdenk3861aa52002-09-27 23:19:37 +0000270 }
wdenk3861aa52002-09-27 23:19:37 +0000271
272#ifdef DEBUG_BOOTP_EXT
wdenk4b9206e2004-03-23 22:14:11 +0000273 puts ("[BOOTP] Received fields: \n");
wdenk232c1502004-03-12 00:14:09 +0000274 if (NetOurSubnetMask) {
275 puts ("NetOurSubnetMask : ");
276 print_IPaddr (NetOurSubnetMask);
277 putc ('\n');
278 }
wdenk3861aa52002-09-27 23:19:37 +0000279
wdenk232c1502004-03-12 00:14:09 +0000280 if (NetOurGatewayIP) {
281 puts ("NetOurGatewayIP : ");
282 print_IPaddr (NetOurGatewayIP);
283 putc ('\n');
284 }
wdenk3861aa52002-09-27 23:19:37 +0000285
wdenk232c1502004-03-12 00:14:09 +0000286 if (NetBootFileSize) {
287 printf ("NetBootFileSize : %d\n", NetBootFileSize);
288 }
wdenk3861aa52002-09-27 23:19:37 +0000289
wdenk232c1502004-03-12 00:14:09 +0000290 if (NetOurHostName[0]) {
291 printf ("NetOurHostName : %s\n", NetOurHostName);
292 }
wdenk3861aa52002-09-27 23:19:37 +0000293
wdenk232c1502004-03-12 00:14:09 +0000294 if (NetOurRootPath[0]) {
295 printf ("NetOurRootPath : %s\n", NetOurRootPath);
296 }
wdenk3861aa52002-09-27 23:19:37 +0000297
wdenk232c1502004-03-12 00:14:09 +0000298 if (NetOurNISDomain[0]) {
299 printf ("NetOurNISDomain : %s\n", NetOurNISDomain);
300 }
wdenk3861aa52002-09-27 23:19:37 +0000301
wdenk232c1502004-03-12 00:14:09 +0000302 if (NetBootFileSize) {
303 printf ("NetBootFileSize: %d\n", NetBootFileSize);
304 }
305#endif /* DEBUG_BOOTP_EXT */
wdenk3861aa52002-09-27 23:19:37 +0000306}
wdenk3861aa52002-09-27 23:19:37 +0000307/*
308 * Handle a BOOTP received packet.
309 */
310static void
311BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
312{
313 Bootp_t *bp;
314 char *s;
315
316 debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%d)\n",
317 src, dest, len, sizeof (Bootp_t));
318
319 bp = (Bootp_t *)pkt;
320
wdenk232c1502004-03-12 00:14:09 +0000321 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
wdenk3861aa52002-09-27 23:19:37 +0000322 return;
323
324 /*
wdenk232c1502004-03-12 00:14:09 +0000325 * Got a good BOOTP reply. Copy the data into our variables.
wdenk3861aa52002-09-27 23:19:37 +0000326 */
327#ifdef CONFIG_STATUS_LED
328 status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF);
329#endif
330
331 BootpCopyNetParams(bp); /* Store net parameters from reply */
332
333 /* Retrieve extended information (we must parse the vendor area) */
334 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200335 BootpVendorProcess((uchar *)&bp->bp_vend[4], len);
wdenk3861aa52002-09-27 23:19:37 +0000336
337 NetSetTimeout(0, (thand_f *)0);
338
339 debug ("Got good BOOTP\n");
340
wdenk132ba5f2004-02-27 08:20:54 +0000341 if ((s = getenv("autoload")) != NULL) {
342 if (*s == 'n') {
343 /*
344 * Just use BOOTP to configure system;
345 * Do not use TFTP to load the bootfile.
346 */
347 NetState = NETLOOP_SUCCESS;
348 return;
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500349#if defined(CONFIG_CMD_NFS)
wdenk132ba5f2004-02-27 08:20:54 +0000350 } else if (strcmp(s, "NFS") == 0) {
351 /*
352 * Use NFS to load the bootfile.
353 */
354 NfsStart();
355 return;
wdenk0e6d7982004-03-14 00:07:33 +0000356#endif
wdenk132ba5f2004-02-27 08:20:54 +0000357 }
wdenk3861aa52002-09-27 23:19:37 +0000358 }
359
wdenk73a8b272003-06-05 19:27:42 +0000360 TftpStart();
wdenk3861aa52002-09-27 23:19:37 +0000361}
Jon Loeliger610f2e92007-07-10 11:05:02 -0500362#endif
wdenk3861aa52002-09-27 23:19:37 +0000363
364/*
365 * Timeout on BOOTP/DHCP request.
366 */
367static void
368BootpTimeout(void)
369{
370 if (BootpTry >= TIMEOUT_COUNT) {
371 puts ("\nRetry count exceeded; starting again\n");
372 NetStartAgain ();
373 } else {
374 NetSetTimeout (TIMEOUT * CFG_HZ, BootpTimeout);
375 BootpRequest ();
376 }
377}
378
379/*
380 * Initialize BOOTP extension fields in the request.
381 */
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500382#if defined(CONFIG_CMD_DHCP)
wdenk232c1502004-03-12 00:14:09 +0000383static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP)
wdenk3861aa52002-09-27 23:19:37 +0000384{
wdenk232c1502004-03-12 00:14:09 +0000385 u8 *start = e;
386 u8 *cnt;
387
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500388#if defined(CONFIG_BOOTP_VENDOREX)
wdenk232c1502004-03-12 00:14:09 +0000389 u8 *x;
wdenk3861aa52002-09-27 23:19:37 +0000390#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500391#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200392 char *hostname;
stroesefe389a82003-08-28 14:17:32 +0000393#endif
wdenk3861aa52002-09-27 23:19:37 +0000394
wdenk232c1502004-03-12 00:14:09 +0000395 *e++ = 99; /* RFC1048 Magic Cookie */
396 *e++ = 130;
397 *e++ = 83;
398 *e++ = 99;
wdenk3861aa52002-09-27 23:19:37 +0000399
wdenk232c1502004-03-12 00:14:09 +0000400 *e++ = 53; /* DHCP Message Type */
401 *e++ = 1;
402 *e++ = message_type;
wdenk3861aa52002-09-27 23:19:37 +0000403
wdenk232c1502004-03-12 00:14:09 +0000404 *e++ = 57; /* Maximum DHCP Message Size */
405 *e++ = 2;
406 *e++ = (576 - 312 + OPT_SIZE) >> 8;
407 *e++ = (576 - 312 + OPT_SIZE) & 0xff;
wdenk3861aa52002-09-27 23:19:37 +0000408
wdenk232c1502004-03-12 00:14:09 +0000409 if (ServerID) {
410 int tmp = ntohl (ServerID);
wdenk3861aa52002-09-27 23:19:37 +0000411
wdenk232c1502004-03-12 00:14:09 +0000412 *e++ = 54; /* ServerID */
413 *e++ = 4;
414 *e++ = tmp >> 24;
415 *e++ = tmp >> 16;
416 *e++ = tmp >> 8;
417 *e++ = tmp & 0xff;
418 }
wdenk3861aa52002-09-27 23:19:37 +0000419
wdenk232c1502004-03-12 00:14:09 +0000420 if (RequestedIP) {
421 int tmp = ntohl (RequestedIP);
wdenk3861aa52002-09-27 23:19:37 +0000422
wdenk232c1502004-03-12 00:14:09 +0000423 *e++ = 50; /* Requested IP */
424 *e++ = 4;
425 *e++ = tmp >> 24;
426 *e++ = tmp >> 16;
427 *e++ = tmp >> 8;
428 *e++ = tmp & 0xff;
429 }
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500430#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
wdenk232c1502004-03-12 00:14:09 +0000431 if ((hostname = getenv ("hostname"))) {
432 int hostnamelen = strlen (hostname);
433
434 *e++ = 12; /* Hostname */
435 *e++ = hostnamelen;
436 memcpy (e, hostname, hostnamelen);
437 e += hostnamelen;
438 }
stroesefe389a82003-08-28 14:17:32 +0000439#endif
440
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500441#if defined(CONFIG_BOOTP_VENDOREX)
wdenk232c1502004-03-12 00:14:09 +0000442 if ((x = dhcp_vendorex_prep (e)))
443 return x - start;
wdenk3861aa52002-09-27 23:19:37 +0000444#endif
445
wdenk232c1502004-03-12 00:14:09 +0000446 *e++ = 55; /* Parameter Request List */
447 cnt = e++; /* Pointer to count of requested items */
448 *cnt = 0;
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500449#if defined(CONFIG_BOOTP_SUBNETMASK)
wdenk232c1502004-03-12 00:14:09 +0000450 *e++ = 1; /* Subnet Mask */
451 *cnt += 1;
wdenk3861aa52002-09-27 23:19:37 +0000452#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500453#if defined(CONFIG_BOOTP_TIMEOFFSET)
wdenkea287de2005-04-01 00:25:43 +0000454 *e++ = 2;
455 *cnt += 1;
456#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500457#if defined(CONFIG_BOOTP_GATEWAY)
wdenk232c1502004-03-12 00:14:09 +0000458 *e++ = 3; /* Router Option */
459 *cnt += 1;
wdenk3861aa52002-09-27 23:19:37 +0000460#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500461#if defined(CONFIG_BOOTP_DNS)
wdenk232c1502004-03-12 00:14:09 +0000462 *e++ = 6; /* DNS Server(s) */
463 *cnt += 1;
wdenk3861aa52002-09-27 23:19:37 +0000464#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500465#if defined(CONFIG_BOOTP_HOSTNAME)
wdenk232c1502004-03-12 00:14:09 +0000466 *e++ = 12; /* Hostname */
467 *cnt += 1;
wdenk3861aa52002-09-27 23:19:37 +0000468#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500469#if defined(CONFIG_BOOTP_BOOTFILESIZE)
wdenk232c1502004-03-12 00:14:09 +0000470 *e++ = 13; /* Boot File Size */
471 *cnt += 1;
wdenk3861aa52002-09-27 23:19:37 +0000472#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500473#if defined(CONFIG_BOOTP_BOOTPATH)
wdenk232c1502004-03-12 00:14:09 +0000474 *e++ = 17; /* Boot path */
475 *cnt += 1;
wdenk3861aa52002-09-27 23:19:37 +0000476#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500477#if defined(CONFIG_BOOTP_NISDOMAIN)
wdenk232c1502004-03-12 00:14:09 +0000478 *e++ = 40; /* NIS Domain name request */
479 *cnt += 1;
wdenk3861aa52002-09-27 23:19:37 +0000480#endif
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500481#if defined(CONFIG_BOOTP_NTPSERVER)
wdenkea287de2005-04-01 00:25:43 +0000482 *e++ = 42;
483 *cnt += 1;
484#endif
wdenk232c1502004-03-12 00:14:09 +0000485 *e++ = 255; /* End of the list */
wdenk3861aa52002-09-27 23:19:37 +0000486
wdenk232c1502004-03-12 00:14:09 +0000487 /* Pad to minimal length */
wdenk3861aa52002-09-27 23:19:37 +0000488#ifdef CONFIG_DHCP_MIN_EXT_LEN
wdenk232c1502004-03-12 00:14:09 +0000489 while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN)
490 *e++ = 0;
wdenk3861aa52002-09-27 23:19:37 +0000491#endif
492
wdenk232c1502004-03-12 00:14:09 +0000493 return e - start;
wdenk3861aa52002-09-27 23:19:37 +0000494}
495
Jon Loeliger610f2e92007-07-10 11:05:02 -0500496#else
wdenk3861aa52002-09-27 23:19:37 +0000497/*
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500498 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
wdenk3861aa52002-09-27 23:19:37 +0000499 */
wdenk232c1502004-03-12 00:14:09 +0000500static int BootpExtended (u8 * e)
wdenk3861aa52002-09-27 23:19:37 +0000501{
wdenk232c1502004-03-12 00:14:09 +0000502 u8 *start = e;
wdenk3861aa52002-09-27 23:19:37 +0000503
wdenk232c1502004-03-12 00:14:09 +0000504 *e++ = 99; /* RFC1048 Magic Cookie */
505 *e++ = 130;
506 *e++ = 83;
507 *e++ = 99;
wdenk3861aa52002-09-27 23:19:37 +0000508
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500509#if defined(CONFIG_CMD_DHCP)
wdenk232c1502004-03-12 00:14:09 +0000510 *e++ = 53; /* DHCP Message Type */
511 *e++ = 1;
512 *e++ = DHCP_DISCOVER;
wdenk3861aa52002-09-27 23:19:37 +0000513
wdenk232c1502004-03-12 00:14:09 +0000514 *e++ = 57; /* Maximum DHCP Message Size */
515 *e++ = 2;
516 *e++ = (576 - 312 + OPT_SIZE) >> 16;
517 *e++ = (576 - 312 + OPT_SIZE) & 0xff;
Jon Loeliger610f2e92007-07-10 11:05:02 -0500518#endif
wdenk3861aa52002-09-27 23:19:37 +0000519
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500520#if defined(CONFIG_BOOTP_SUBNETMASK)
wdenk232c1502004-03-12 00:14:09 +0000521 *e++ = 1; /* Subnet mask request */
522 *e++ = 4;
523 e += 4;
wdenk3861aa52002-09-27 23:19:37 +0000524#endif
525
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500526#if defined(CONFIG_BOOTP_GATEWAY)
wdenk232c1502004-03-12 00:14:09 +0000527 *e++ = 3; /* Default gateway request */
528 *e++ = 4;
529 e += 4;
wdenk3861aa52002-09-27 23:19:37 +0000530#endif
531
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500532#if defined(CONFIG_BOOTP_DNS)
wdenk232c1502004-03-12 00:14:09 +0000533 *e++ = 6; /* Domain Name Server */
534 *e++ = 4;
535 e += 4;
wdenk3861aa52002-09-27 23:19:37 +0000536#endif
537
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500538#if defined(CONFIG_BOOTP_HOSTNAME)
wdenk232c1502004-03-12 00:14:09 +0000539 *e++ = 12; /* Host name request */
540 *e++ = 32;
541 e += 32;
wdenk3861aa52002-09-27 23:19:37 +0000542#endif
543
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500544#if defined(CONFIG_BOOTP_BOOTFILESIZE)
wdenk232c1502004-03-12 00:14:09 +0000545 *e++ = 13; /* Boot file size */
546 *e++ = 2;
547 e += 2;
wdenk3861aa52002-09-27 23:19:37 +0000548#endif
549
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500550#if defined(CONFIG_BOOTP_BOOTPATH)
wdenk232c1502004-03-12 00:14:09 +0000551 *e++ = 17; /* Boot path */
552 *e++ = 32;
553 e += 32;
wdenk3861aa52002-09-27 23:19:37 +0000554#endif
555
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500556#if defined(CONFIG_BOOTP_NISDOMAIN)
wdenk232c1502004-03-12 00:14:09 +0000557 *e++ = 40; /* NIS Domain name request */
558 *e++ = 32;
559 e += 32;
wdenk3861aa52002-09-27 23:19:37 +0000560#endif
561
wdenk232c1502004-03-12 00:14:09 +0000562 *e++ = 255; /* End of the list */
wdenk3861aa52002-09-27 23:19:37 +0000563
wdenk232c1502004-03-12 00:14:09 +0000564 return e - start;
wdenk3861aa52002-09-27 23:19:37 +0000565}
Jon Loeliger610f2e92007-07-10 11:05:02 -0500566#endif
wdenk3861aa52002-09-27 23:19:37 +0000567
568void
569BootpRequest (void)
570{
571 volatile uchar *pkt, *iphdr;
572 Bootp_t *bp;
573 int ext_len, pktlen, iplen;
574
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500575#if defined(CONFIG_CMD_DHCP)
wdenk3861aa52002-09-27 23:19:37 +0000576 dhcp_state = INIT;
577#endif
578
579#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
580 unsigned char bi_enetaddr[6];
581 int reg;
582 char *e,*s;
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200583 char tmp[64];
wdenk3861aa52002-09-27 23:19:37 +0000584 ulong tst1, tst2, sum, m_mask, m_value = 0;
585
586 if (BootpTry ==0) {
587 /* get our mac */
588 reg = getenv_r ("ethaddr", tmp, sizeof(tmp));
589 s = (reg > 0) ? tmp : NULL;
590
591 for (reg=0; reg<6; ++reg) {
592 bi_enetaddr[reg] = s ? simple_strtoul(s, &e, 16) : 0;
593 if (s) {
594 s = (*e) ? e+1 : e;
595 }
596 }
597#ifdef DEBUG
wdenk4b9206e2004-03-23 22:14:11 +0000598 puts ("BootpRequest => Our Mac: ");
wdenk3861aa52002-09-27 23:19:37 +0000599 for (reg=0; reg<6; reg++) {
600 printf ("%x%c",
601 bi_enetaddr[reg],
602 reg==5 ? '\n' : ':');
603 }
604#endif /* DEBUG */
605
606 /* Mac-Manipulation 2 get seed1 */
607 tst1=0;
608 tst2=0;
609 for (reg=2; reg<6; reg++) {
610 tst1 = tst1 << 8;
611 tst1 = tst1 | bi_enetaddr[reg];
612 }
613 for (reg=0; reg<2; reg++) {
614 tst2 = tst2 | bi_enetaddr[reg];
615 tst2 = tst2 << 8;
616 }
617
618 seed1 = tst1^tst2;
619
620 /* Mirror seed1*/
621 m_mask=0x1;
622 for (reg=1;reg<=32;reg++) {
623 m_value |= (m_mask & seed1);
624 seed1 = seed1 >> 1;
625 m_value = m_value << 1;
626 }
627 seed1 = m_value;
628 seed2 = 0xB78D0945;
629 }
630
631 /* Random Number Generator */
632
633 for (reg=0;reg<=0;reg++) {
634 sum = seed1 + seed2;
635 if (sum < seed1 || sum < seed2)
636 sum++;
wdenk8bde7f72003-06-27 21:31:46 +0000637 seed2 = seed1;
wdenk3861aa52002-09-27 23:19:37 +0000638 seed1 = sum;
639
640 if (BootpTry<=2) { /* Start with max 1024 * 1ms */
641 sum = sum >> (22-BootpTry);
642 } else { /*After 3rd BOOTP request max 8192 * 1ms */
643 sum = sum >> 19;
644 }
645 }
646
647 printf ("Random delay: %ld ms...\n", sum);
648 for (reg=0; reg <sum; reg++) {
649 udelay(1000); /*Wait 1ms*/
650 }
651#endif /* CONFIG_BOOTP_RANDOM_DELAY */
652
653 printf("BOOTP broadcast %d\n", ++BootpTry);
654 pkt = NetTxPacket;
655 memset ((void*)pkt, 0, PKTSIZE);
656
wdenka3d991b2004-04-15 21:48:45 +0000657 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP);
wdenk3861aa52002-09-27 23:19:37 +0000658
659 /*
660 * Next line results in incorrect packet size being transmitted, resulting
661 * in errors in some DHCP servers, reporting missing bytes. Size must be
662 * set in packet header after extension length has been determined.
663 * C. Hallinan, DS4.COM, Inc.
664 */
665 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
666 iphdr = pkt; /* We need this later for NetSetIP() */
667 pkt += IP_HDR_SIZE;
668
669 bp = (Bootp_t *)pkt;
670 bp->bp_op = OP_BOOTREQUEST;
671 bp->bp_htype = HWT_ETHER;
672 bp->bp_hlen = HWL_ETHER;
673 bp->bp_hops = 0;
674 bp->bp_secs = htons(get_timer(0) / CFG_HZ);
675 NetWriteIP(&bp->bp_ciaddr, 0);
676 NetWriteIP(&bp->bp_yiaddr, 0);
677 NetWriteIP(&bp->bp_siaddr, 0);
678 NetWriteIP(&bp->bp_giaddr, 0);
679 memcpy (bp->bp_chaddr, NetOurEther, 6);
680 copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file));
681
682 /* Request additional information from the BOOTP/DHCP server */
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500683#if defined(CONFIG_CMD_DHCP)
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200684 ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0);
wdenk3861aa52002-09-27 23:19:37 +0000685#else
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200686 ext_len = BootpExtended((u8 *)bp->bp_vend);
Jon Loeliger610f2e92007-07-10 11:05:02 -0500687#endif
wdenk3861aa52002-09-27 23:19:37 +0000688
689 /*
690 * Bootp ID is the lower 4 bytes of our ethernet address
691 * plus the current time in HZ.
692 */
693 BootpID = ((ulong)NetOurEther[2] << 24)
694 | ((ulong)NetOurEther[3] << 16)
695 | ((ulong)NetOurEther[4] << 8)
696 | (ulong)NetOurEther[5];
697 BootpID += get_timer(0);
wdenk232c1502004-03-12 00:14:09 +0000698 BootpID = htonl(BootpID);
wdenk3861aa52002-09-27 23:19:37 +0000699 NetCopyLong(&bp->bp_id, &BootpID);
700
701 /*
702 * Calculate proper packet lengths taking into account the
703 * variable size of the options field
704 */
705 pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + ext_len;
706 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len;
707 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
708 NetSetTimeout(SELECT_TIMEOUT * CFG_HZ, BootpTimeout);
709
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500710#if defined(CONFIG_CMD_DHCP)
wdenk3861aa52002-09-27 23:19:37 +0000711 dhcp_state = SELECTING;
712 NetSetHandler(DhcpHandler);
713#else
714 NetSetHandler(BootpHandler);
Jon Loeliger610f2e92007-07-10 11:05:02 -0500715#endif
wdenk3861aa52002-09-27 23:19:37 +0000716 NetSendPacket(NetTxPacket, pktlen);
717}
718
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500719#if defined(CONFIG_CMD_DHCP)
Wolfgang Denk3b2e4fd2006-03-12 18:26:46 +0100720static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp)
wdenk3861aa52002-09-27 23:19:37 +0000721{
wdenk3e386912003-04-05 00:53:31 +0000722 uchar *end = popt + BOOTP_HDR_SIZE;
wdenk3861aa52002-09-27 23:19:37 +0000723 int oplen, size;
724
wdenk232c1502004-03-12 00:14:09 +0000725 while (popt < end && *popt != 0xff) {
wdenk3861aa52002-09-27 23:19:37 +0000726 oplen = *(popt + 1);
wdenk232c1502004-03-12 00:14:09 +0000727 switch (*popt) {
728 case 1:
729 NetCopyIP (&NetOurSubnetMask, (popt + 2));
730 break;
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500731#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
wdenkea287de2005-04-01 00:25:43 +0000732 case 2: /* Time offset */
Wolfgang Denk135e19b2007-09-18 21:36:35 +0200733 NetCopyLong ((ulong *)&NetTimeOffset, (ulong *) (popt + 2));
wdenkea287de2005-04-01 00:25:43 +0000734 NetTimeOffset = ntohl (NetTimeOffset);
735 break;
736#endif
wdenk232c1502004-03-12 00:14:09 +0000737 case 3:
738 NetCopyIP (&NetOurGatewayIP, (popt + 2));
739 break;
740 case 6:
741 NetCopyIP (&NetOurDNSIP, (popt + 2));
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500742#if defined(CONFIG_BOOTP_DNS2)
wdenk232c1502004-03-12 00:14:09 +0000743 if (*(popt + 1) > 4) {
744 NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4));
745 }
stroesefe389a82003-08-28 14:17:32 +0000746#endif
wdenk232c1502004-03-12 00:14:09 +0000747 break;
748 case 12:
749 size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen);
750 memcpy (&NetOurHostName, popt + 2, size);
751 NetOurHostName[size] = 0;
752 break;
753 case 15: /* Ignore Domain Name Option */
754 break;
755 case 17:
756 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen);
757 memcpy (&NetOurRootPath, popt + 2, size);
758 NetOurRootPath[size] = 0;
759 break;
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500760#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
wdenkea287de2005-04-01 00:25:43 +0000761 case 42: /* NTP server IP */
762 NetCopyIP (&NetNtpServerIP, (popt + 2));
763 break;
764#endif
wdenk232c1502004-03-12 00:14:09 +0000765 case 51:
766 NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2));
767 break;
768 case 53: /* Ignore Message Type Option */
769 break;
770 case 54:
771 NetCopyIP (&NetDHCPServerIP, (popt + 2));
772 break;
773 case 58: /* Ignore Renewal Time Option */
774 break;
775 case 59: /* Ignore Rebinding Time Option */
776 break;
Wolfgang Denk3b2e4fd2006-03-12 18:26:46 +0100777 case 66: /* Ignore TFTP server name */
778 break;
779 case 67: /* vendor opt bootfile */
780 /*
781 * I can't use dhcp_vendorex_proc here because I need
782 * to write into the bootp packet - even then I had to
783 * pass the bootp packet pointer into here as the
784 * second arg
785 */
786 size = truncate_sz ("Opt Boot File",
787 sizeof(bp->bp_file),
788 oplen);
789 if (bp->bp_file[0] == '\0' && size > 0) {
790 /*
791 * only use vendor boot file if we didn't
792 * receive a boot file in the main non-vendor
793 * part of the packet - god only knows why
794 * some vendors chose not to use this perfectly
795 * good spot to store the boot file (join on
796 * Tru64 Unix) it seems mind bogglingly crazy
797 * to me
798 */
799 printf("*** WARNING: using vendor "
800 "optional boot file\n");
801 memcpy(bp->bp_file, popt + 2, size);
802 bp->bp_file[size] = '\0';
803 }
804 break;
wdenk232c1502004-03-12 00:14:09 +0000805 default:
Jon Loeliger1fe80d72007-07-09 22:08:34 -0500806#if defined(CONFIG_BOOTP_VENDOREX)
wdenk232c1502004-03-12 00:14:09 +0000807 if (dhcp_vendorex_proc (popt))
wdenk8bde7f72003-06-27 21:31:46 +0000808 break;
wdenk3861aa52002-09-27 23:19:37 +0000809#endif
wdenk232c1502004-03-12 00:14:09 +0000810 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt);
811 break;
wdenk3861aa52002-09-27 23:19:37 +0000812 }
813 popt += oplen + 2; /* Process next option */
814 }
815}
816
817static int DhcpMessageType(unsigned char *popt)
818{
819 if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC))
820 return -1;
821
822 popt += 4;
823 while ( *popt != 0xff ) {
824 if ( *popt == 53 ) /* DHCP Message Type */
825 return *(popt + 2);
826 popt += *(popt + 1) + 2; /* Scan through all options */
827 }
828 return -1;
829}
830
wdenk3e386912003-04-05 00:53:31 +0000831static void DhcpSendRequestPkt(Bootp_t *bp_offer)
wdenk3861aa52002-09-27 23:19:37 +0000832{
833 volatile uchar *pkt, *iphdr;
834 Bootp_t *bp;
835 int pktlen, iplen, extlen;
wdenk47cd00f2003-03-06 13:39:27 +0000836 IPaddr_t OfferedIP;
wdenk3861aa52002-09-27 23:19:37 +0000837
838 debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
839 pkt = NetTxPacket;
840 memset ((void*)pkt, 0, PKTSIZE);
841
wdenka3d991b2004-04-15 21:48:45 +0000842 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP);
wdenk3861aa52002-09-27 23:19:37 +0000843
844 iphdr = pkt; /* We'll need this later to set proper pkt size */
845 pkt += IP_HDR_SIZE;
846
847 bp = (Bootp_t *)pkt;
848 bp->bp_op = OP_BOOTREQUEST;
849 bp->bp_htype = HWT_ETHER;
850 bp->bp_hlen = HWL_ETHER;
851 bp->bp_hops = 0;
852 bp->bp_secs = htons(get_timer(0) / CFG_HZ);
Justin Flammiae5c794e2007-10-29 17:40:35 -0400853 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by
854 * the server yet */
855
Wolfgang Denkc6686702006-10-12 00:01:08 +0200856 /*
Wolfgang Denkd82718f2006-10-09 01:26:14 +0200857 * RFC3046 requires Relay Agents to discard packets with
858 * nonzero and offered giaddr
859 */
860 NetWriteIP(&bp->bp_giaddr, 0);
861
wdenk3861aa52002-09-27 23:19:37 +0000862 memcpy (bp->bp_chaddr, NetOurEther, 6);
863
864 /*
865 * ID is the id of the OFFER packet
866 */
867
868 NetCopyLong(&bp->bp_id, &bp_offer->bp_id);
869
870 /*
871 * Copy options from OFFER packet if present
872 */
Justin Flammiae5c794e2007-10-29 17:40:35 -0400873
874 /* Copy offered IP into the parameters request list */
875 NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr);
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200876 extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP);
wdenk3861aa52002-09-27 23:19:37 +0000877
878 pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + extlen;
879 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen;
880 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
881
Aras Vaichasd9a2f412008-03-26 09:43:57 +1100882 debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
883#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
884 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
885#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
wdenk3861aa52002-09-27 23:19:37 +0000886 NetSendPacket(NetTxPacket, pktlen);
887}
888
889/*
890 * Handle DHCP received packets.
891 */
892static void
893DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
894{
895 Bootp_t *bp = (Bootp_t *)pkt;
896
897 debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
898 src, dest, len, dhcp_state);
899
wdenk232c1502004-03-12 00:14:09 +0000900 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
wdenk3861aa52002-09-27 23:19:37 +0000901 return;
902
903 debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
904 src, dest, len, dhcp_state);
905
906 switch (dhcp_state) {
907 case SELECTING:
908 /*
909 * Wait an appropriate time for any potential DHCPOFFER packets
910 * to arrive. Then select one, and generate DHCPREQUEST response.
911 * If filename is in format we recognize, assume it is a valid
912 * OFFER from a server we want.
913 */
914 debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
915#ifdef CFG_BOOTFILE_PREFIX
916 if (strncmp(bp->bp_file,
917 CFG_BOOTFILE_PREFIX,
918 strlen(CFG_BOOTFILE_PREFIX)) == 0 ) {
919#endif /* CFG_BOOTFILE_PREFIX */
920
921 debug ("TRANSITIONING TO REQUESTING STATE\n");
922 dhcp_state = REQUESTING;
stroese759a51b2003-04-10 13:26:44 +0000923
wdenk3861aa52002-09-27 23:19:37 +0000924 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
Wolfgang Denk3b2e4fd2006-03-12 18:26:46 +0100925 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
wdenk3861aa52002-09-27 23:19:37 +0000926
wdenk232c1502004-03-12 00:14:09 +0000927 BootpCopyNetParams(bp); /* Store net params from reply */
wdenk3861aa52002-09-27 23:19:37 +0000928
929 NetSetTimeout(TIMEOUT * CFG_HZ, BootpTimeout);
930 DhcpSendRequestPkt(bp);
931#ifdef CFG_BOOTFILE_PREFIX
932 }
933#endif /* CFG_BOOTFILE_PREFIX */
934
935 return;
936 break;
937 case REQUESTING:
938 debug ("DHCP State: REQUESTING\n");
939
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200940 if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) {
wdenk3861aa52002-09-27 23:19:37 +0000941 char *s;
942
943 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
Wolfgang Denk3b2e4fd2006-03-12 18:26:46 +0100944 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
wdenk232c1502004-03-12 00:14:09 +0000945 BootpCopyNetParams(bp); /* Store net params from reply */
wdenk3861aa52002-09-27 23:19:37 +0000946 dhcp_state = BOUND;
wdenk4b9206e2004-03-23 22:14:11 +0000947 puts ("DHCP client bound to address ");
wdenk3861aa52002-09-27 23:19:37 +0000948 print_IPaddr(NetOurIP);
wdenk4b9206e2004-03-23 22:14:11 +0000949 putc ('\n');
wdenk3861aa52002-09-27 23:19:37 +0000950
951 /* Obey the 'autoload' setting */
wdenk132ba5f2004-02-27 08:20:54 +0000952 if ((s = getenv("autoload")) != NULL) {
953 if (*s == 'n') {
954 /*
955 * Just use BOOTP to configure system;
956 * Do not use TFTP to load the bootfile.
957 */
958 NetState = NETLOOP_SUCCESS;
959 return;
Jon Loeliger643d1ab2007-07-09 17:45:14 -0500960#if defined(CONFIG_CMD_NFS)
wdenk132ba5f2004-02-27 08:20:54 +0000961 } else if (strcmp(s, "NFS") == 0) {
962 /*
963 * Use NFS to load the bootfile.
964 */
965 NfsStart();
966 return;
wdenk0e6d7982004-03-14 00:07:33 +0000967#endif
wdenk132ba5f2004-02-27 08:20:54 +0000968 }
wdenk3861aa52002-09-27 23:19:37 +0000969 }
wdenk73a8b272003-06-05 19:27:42 +0000970 TftpStart();
wdenk3861aa52002-09-27 23:19:37 +0000971 return;
972 }
973 break;
974 default:
wdenk4b9206e2004-03-23 22:14:11 +0000975 puts ("DHCP: INVALID STATE\n");
wdenk3861aa52002-09-27 23:19:37 +0000976 break;
977 }
978
979}
980
981void DhcpRequest(void)
982{
983 BootpRequest();
984}
Wolfgang Denk992742a2007-11-03 23:09:27 +0100985#endif /* CONFIG_CMD_DHCP */
wdenk3861aa52002-09-27 23:19:37 +0000986
Wolfgang Denk992742a2007-11-03 23:09:27 +0100987#endif /* CONFIG_CMD_NET */