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omap3: embedd gpmc_cs into gpmc config struct
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1/*
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
8 * Copyright 2000-2004 Wolfgang Denk, wd@denx.de
9 */
10
11#if 0
12#define DEBUG 1 /* general debug */
13#define DEBUG_BOOTP_EXT 1 /* Debug received vendor fields */
14#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"
27#include "nfs.h"
28#ifdef CONFIG_STATUS_LED
29#include <status_led.h>
30#endif
31
32#define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
33
34#if defined(CONFIG_CMD_NET)
35
36#define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */
37#ifndef CONFIG_NET_RETRY_COUNT
38# define TIMEOUT_COUNT 5 /* # of timeouts before giving up */
39#else
40# define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
41#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 */
47#define CONFIG_DHCP_MIN_EXT_LEN 64
48#endif
49
50ulong BootpID;
51int BootpTry;
52#ifdef CONFIG_BOOTP_RANDOM_DELAY
53ulong seed1, seed2;
54#endif
55
56#if defined(CONFIG_CMD_DHCP)
57dhcp_state_t dhcp_state = INIT;
58unsigned long dhcp_leasetime = 0;
59IPaddr_t NetDHCPServerIP = 0;
60static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len);
61
62/* For Debug */
63#if 0
64static char *dhcpmsg2str(int type)
65{
66 switch (type) {
67 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;
74 default: return "UNKNOWN/INVALID MSG TYPE"; break;
75 }
76}
77#endif
78
79#if defined(CONFIG_BOOTP_VENDOREX)
80extern 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
84#endif
85
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 */
118static void BootpCopyNetParams(Bootp_t *bp)
119{
120 IPaddr_t tmp_ip;
121
122 NetCopyIP(&NetOurIP, &bp->bp_yiaddr);
123#if !defined(CONFIG_BOOTP_SERVERIP)
124 NetCopyIP(&tmp_ip, &bp->bp_siaddr);
125 if (tmp_ip != 0)
126 NetCopyIP(&NetServerIP, &bp->bp_siaddr);
127 memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6);
128#endif
129 if (strlen(bp->bp_file) > 0)
130 copy_filename (BootFile, bp->bp_file, sizeof(BootFile));
131
132 debug ("Bootfile: %s\n", BootFile);
133
134 /* Propagate to environment:
135 * don't delete exising entry when BOOTP / DHCP reply does
136 * 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
153#if !defined(CONFIG_CMD_DHCP)
154
155static void BootpVendorFieldProcess (u8 * ext)
156{
157 int size = *(ext + 1);
158
159 debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
160 *(ext + 1));
161
162 NetBootFileSize = 0;
163
164 switch (*ext) {
165 /* Fixed length fields */
166 case 1: /* Subnet mask */
167 if (NetOurSubnetMask == 0)
168 NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2));
169 break;
170 case 2: /* Time offset - Not yet supported */
171 break;
172 /* Variable length fields */
173 case 3: /* Gateways list */
174 if (NetOurGatewayIP == 0) {
175 NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2));
176 }
177 break;
178 case 4: /* Time server - Not yet supported */
179 break;
180 case 5: /* IEN-116 name server - Not yet supported */
181 break;
182 case 6:
183 if (NetOurDNSIP == 0) {
184 NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2));
185 }
186#if defined(CONFIG_BOOTP_DNS2)
187 if ((NetOurDNS2IP == 0) && (size > 4)) {
188 NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4));
189 }
190#endif
191 break;
192 case 7: /* Log server - Not yet supported */
193 break;
194 case 8: /* Cookie/Quote server - Not yet supported */
195 break;
196 case 9: /* LPR server - Not yet supported */
197 break;
198 case 10: /* Impress server - Not yet supported */
199 break;
200 case 11: /* RPL server - Not yet supported */
201 break;
202 case 12: /* Host name */
203 if (NetOurHostName[0] == 0) {
204 size = truncate_sz ("Host Name", sizeof (NetOurHostName), size);
205 memcpy (&NetOurHostName, ext + 2, size);
206 NetOurHostName[size] = 0;
207 }
208 break;
209 case 13: /* Boot file size */
210 if (size == 2)
211 NetBootFileSize = ntohs (*(ushort *) (ext + 2));
212 else if (size == 4)
213 NetBootFileSize = ntohl (*(ulong *) (ext + 2));
214 break;
215 case 14: /* Merit dump file - Not yet supported */
216 break;
217 case 15: /* Domain name - Not yet supported */
218 break;
219 case 16: /* Swap server - Not yet supported */
220 break;
221 case 17: /* Root path */
222 if (NetOurRootPath[0] == 0) {
223 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size);
224 memcpy (&NetOurRootPath, ext + 2, size);
225 NetOurRootPath[size] = 0;
226 }
227 break;
228 case 18: /* Extension path - Not yet supported */
229 /*
230 * This can be used to send the information of the
231 * vendor area in another file that the client can
232 * access via TFTP.
233 */
234 break;
235 /* IP host layer fields */
236 case 40: /* NIS Domain name */
237 if (NetOurNISDomain[0] == 0) {
238 size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size);
239 memcpy (&NetOurNISDomain, ext + 2, size);
240 NetOurNISDomain[size] = 0;
241 }
242 break;
243 /* Application layer fields */
244 case 43: /* Vendor specific info - Not yet supported */
245 /*
246 * Binary information to exchange specific
247 * product information.
248 */
249 break;
250 /* Reserved (custom) fields (128..254) */
251 }
252}
253
254static void BootpVendorProcess (u8 * ext, int size)
255{
256 u8 *end = ext + size;
257
258 debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size);
259
260 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 }
270 }
271
272#ifdef DEBUG_BOOTP_EXT
273 puts ("[BOOTP] Received fields: \n");
274 if (NetOurSubnetMask)
275 printf ("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask);
276
277 if (NetOurGatewayIP)
278 printf ("NetOurGatewayIP : %pI4", &NetOurGatewayIP);
279
280 if (NetBootFileSize) {
281 printf ("NetBootFileSize : %d\n", NetBootFileSize);
282 }
283
284 if (NetOurHostName[0]) {
285 printf ("NetOurHostName : %s\n", NetOurHostName);
286 }
287
288 if (NetOurRootPath[0]) {
289 printf ("NetOurRootPath : %s\n", NetOurRootPath);
290 }
291
292 if (NetOurNISDomain[0]) {
293 printf ("NetOurNISDomain : %s\n", NetOurNISDomain);
294 }
295
296 if (NetBootFileSize) {
297 printf ("NetBootFileSize: %d\n", NetBootFileSize);
298 }
299#endif /* DEBUG_BOOTP_EXT */
300}
301/*
302 * Handle a BOOTP received packet.
303 */
304static void
305BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
306{
307 Bootp_t *bp;
308 char *s;
309
310 debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
311 src, dest, len, sizeof (Bootp_t));
312
313 bp = (Bootp_t *)pkt;
314
315 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
316 return;
317
318 /*
319 * Got a good BOOTP reply. Copy the data into our variables.
320 */
321#ifdef CONFIG_STATUS_LED
322 status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF);
323#endif
324
325 BootpCopyNetParams(bp); /* Store net parameters from reply */
326
327 /* Retrieve extended information (we must parse the vendor area) */
328 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
329 BootpVendorProcess((uchar *)&bp->bp_vend[4], len);
330
331 NetSetTimeout(0, (thand_f *)0);
332
333 debug ("Got good BOOTP\n");
334
335 if ((s = getenv("autoload")) != NULL) {
336 if (*s == 'n') {
337 /*
338 * Just use BOOTP to configure system;
339 * Do not use TFTP to load the bootfile.
340 */
341 NetState = NETLOOP_SUCCESS;
342 return;
343#if defined(CONFIG_CMD_NFS)
344 } else if (strcmp(s, "NFS") == 0) {
345 /*
346 * Use NFS to load the bootfile.
347 */
348 NfsStart();
349 return;
350#endif
351 }
352 }
353
354 TftpStart();
355}
356#endif
357
358/*
359 * Timeout on BOOTP/DHCP request.
360 */
361static void
362BootpTimeout(void)
363{
364 if (BootpTry >= TIMEOUT_COUNT) {
365 puts ("\nRetry count exceeded; starting again\n");
366 NetStartAgain ();
367 } else {
368 NetSetTimeout (TIMEOUT, BootpTimeout);
369 BootpRequest ();
370 }
371}
372
373/*
374 * Initialize BOOTP extension fields in the request.
375 */
376#if defined(CONFIG_CMD_DHCP)
377static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP)
378{
379 u8 *start = e;
380 u8 *cnt;
381
382#if defined(CONFIG_BOOTP_VENDOREX)
383 u8 *x;
384#endif
385#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
386 char *hostname;
387#endif
388
389 *e++ = 99; /* RFC1048 Magic Cookie */
390 *e++ = 130;
391 *e++ = 83;
392 *e++ = 99;
393
394 *e++ = 53; /* DHCP Message Type */
395 *e++ = 1;
396 *e++ = message_type;
397
398 *e++ = 57; /* Maximum DHCP Message Size */
399 *e++ = 2;
400 *e++ = (576 - 312 + OPT_SIZE) >> 8;
401 *e++ = (576 - 312 + OPT_SIZE) & 0xff;
402
403 if (ServerID) {
404 int tmp = ntohl (ServerID);
405
406 *e++ = 54; /* ServerID */
407 *e++ = 4;
408 *e++ = tmp >> 24;
409 *e++ = tmp >> 16;
410 *e++ = tmp >> 8;
411 *e++ = tmp & 0xff;
412 }
413
414 if (RequestedIP) {
415 int tmp = ntohl (RequestedIP);
416
417 *e++ = 50; /* Requested IP */
418 *e++ = 4;
419 *e++ = tmp >> 24;
420 *e++ = tmp >> 16;
421 *e++ = tmp >> 8;
422 *e++ = tmp & 0xff;
423 }
424#if defined(CONFIG_BOOTP_SEND_HOSTNAME)
425 if ((hostname = getenv ("hostname"))) {
426 int hostnamelen = strlen (hostname);
427
428 *e++ = 12; /* Hostname */
429 *e++ = hostnamelen;
430 memcpy (e, hostname, hostnamelen);
431 e += hostnamelen;
432 }
433#endif
434
435#if defined(CONFIG_BOOTP_VENDOREX)
436 if ((x = dhcp_vendorex_prep (e)))
437 return x - start;
438#endif
439
440 *e++ = 55; /* Parameter Request List */
441 cnt = e++; /* Pointer to count of requested items */
442 *cnt = 0;
443#if defined(CONFIG_BOOTP_SUBNETMASK)
444 *e++ = 1; /* Subnet Mask */
445 *cnt += 1;
446#endif
447#if defined(CONFIG_BOOTP_TIMEOFFSET)
448 *e++ = 2;
449 *cnt += 1;
450#endif
451#if defined(CONFIG_BOOTP_GATEWAY)
452 *e++ = 3; /* Router Option */
453 *cnt += 1;
454#endif
455#if defined(CONFIG_BOOTP_DNS)
456 *e++ = 6; /* DNS Server(s) */
457 *cnt += 1;
458#endif
459#if defined(CONFIG_BOOTP_HOSTNAME)
460 *e++ = 12; /* Hostname */
461 *cnt += 1;
462#endif
463#if defined(CONFIG_BOOTP_BOOTFILESIZE)
464 *e++ = 13; /* Boot File Size */
465 *cnt += 1;
466#endif
467#if defined(CONFIG_BOOTP_BOOTPATH)
468 *e++ = 17; /* Boot path */
469 *cnt += 1;
470#endif
471#if defined(CONFIG_BOOTP_NISDOMAIN)
472 *e++ = 40; /* NIS Domain name request */
473 *cnt += 1;
474#endif
475#if defined(CONFIG_BOOTP_NTPSERVER)
476 *e++ = 42;
477 *cnt += 1;
478#endif
479 *e++ = 255; /* End of the list */
480
481 /* Pad to minimal length */
482#ifdef CONFIG_DHCP_MIN_EXT_LEN
483 while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN)
484 *e++ = 0;
485#endif
486
487 return e - start;
488}
489
490#else
491/*
492 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
493 */
494static int BootpExtended (u8 * e)
495{
496 u8 *start = e;
497
498 *e++ = 99; /* RFC1048 Magic Cookie */
499 *e++ = 130;
500 *e++ = 83;
501 *e++ = 99;
502
503#if defined(CONFIG_CMD_DHCP)
504 *e++ = 53; /* DHCP Message Type */
505 *e++ = 1;
506 *e++ = DHCP_DISCOVER;
507
508 *e++ = 57; /* Maximum DHCP Message Size */
509 *e++ = 2;
510 *e++ = (576 - 312 + OPT_SIZE) >> 16;
511 *e++ = (576 - 312 + OPT_SIZE) & 0xff;
512#endif
513
514#if defined(CONFIG_BOOTP_SUBNETMASK)
515 *e++ = 1; /* Subnet mask request */
516 *e++ = 4;
517 e += 4;
518#endif
519
520#if defined(CONFIG_BOOTP_GATEWAY)
521 *e++ = 3; /* Default gateway request */
522 *e++ = 4;
523 e += 4;
524#endif
525
526#if defined(CONFIG_BOOTP_DNS)
527 *e++ = 6; /* Domain Name Server */
528 *e++ = 4;
529 e += 4;
530#endif
531
532#if defined(CONFIG_BOOTP_HOSTNAME)
533 *e++ = 12; /* Host name request */
534 *e++ = 32;
535 e += 32;
536#endif
537
538#if defined(CONFIG_BOOTP_BOOTFILESIZE)
539 *e++ = 13; /* Boot file size */
540 *e++ = 2;
541 e += 2;
542#endif
543
544#if defined(CONFIG_BOOTP_BOOTPATH)
545 *e++ = 17; /* Boot path */
546 *e++ = 32;
547 e += 32;
548#endif
549
550#if defined(CONFIG_BOOTP_NISDOMAIN)
551 *e++ = 40; /* NIS Domain name request */
552 *e++ = 32;
553 e += 32;
554#endif
555
556 *e++ = 255; /* End of the list */
557
558 return e - start;
559}
560#endif
561
562void
563BootpRequest (void)
564{
565 volatile uchar *pkt, *iphdr;
566 Bootp_t *bp;
567 int ext_len, pktlen, iplen;
568
569#if defined(CONFIG_CMD_DHCP)
570 dhcp_state = INIT;
571#endif
572
573#ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
574 unsigned char bi_enetaddr[6];
575 int reg;
576 ulong tst1, tst2, sum, m_mask, m_value = 0;
577
578 if (BootpTry ==0) {
579 /* get our mac */
580 eth_getenv_enetaddr("ethaddr", bi_enetaddr);
581
582#ifdef DEBUG
583 puts ("BootpRequest => Our Mac: ");
584 for (reg=0; reg<6; reg++) {
585 printf ("%x%c",
586 bi_enetaddr[reg],
587 reg==5 ? '\n' : ':');
588 }
589#endif /* DEBUG */
590
591 /* Mac-Manipulation 2 get seed1 */
592 tst1=0;
593 tst2=0;
594 for (reg=2; reg<6; reg++) {
595 tst1 = tst1 << 8;
596 tst1 = tst1 | bi_enetaddr[reg];
597 }
598 for (reg=0; reg<2; reg++) {
599 tst2 = tst2 | bi_enetaddr[reg];
600 tst2 = tst2 << 8;
601 }
602
603 seed1 = tst1^tst2;
604
605 /* Mirror seed1*/
606 m_mask=0x1;
607 for (reg=1;reg<=32;reg++) {
608 m_value |= (m_mask & seed1);
609 seed1 = seed1 >> 1;
610 m_value = m_value << 1;
611 }
612 seed1 = m_value;
613 seed2 = 0xB78D0945;
614 }
615
616 /* Random Number Generator */
617
618 for (reg=0;reg<=0;reg++) {
619 sum = seed1 + seed2;
620 if (sum < seed1 || sum < seed2)
621 sum++;
622 seed2 = seed1;
623 seed1 = sum;
624
625 if (BootpTry<=2) { /* Start with max 1024 * 1ms */
626 sum = sum >> (22-BootpTry);
627 } else { /*After 3rd BOOTP request max 8192 * 1ms */
628 sum = sum >> 19;
629 }
630 }
631
632 printf ("Random delay: %ld ms...\n", sum);
633 for (reg=0; reg <sum; reg++) {
634 udelay(1000); /*Wait 1ms*/
635 }
636#endif /* CONFIG_BOOTP_RANDOM_DELAY */
637
638 printf("BOOTP broadcast %d\n", ++BootpTry);
639 pkt = NetTxPacket;
640 memset ((void*)pkt, 0, PKTSIZE);
641
642 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP);
643
644 /*
645 * Next line results in incorrect packet size being transmitted, resulting
646 * in errors in some DHCP servers, reporting missing bytes. Size must be
647 * set in packet header after extension length has been determined.
648 * C. Hallinan, DS4.COM, Inc.
649 */
650 /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */
651 iphdr = pkt; /* We need this later for NetSetIP() */
652 pkt += IP_HDR_SIZE;
653
654 bp = (Bootp_t *)pkt;
655 bp->bp_op = OP_BOOTREQUEST;
656 bp->bp_htype = HWT_ETHER;
657 bp->bp_hlen = HWL_ETHER;
658 bp->bp_hops = 0;
659 bp->bp_secs = htons(get_timer(0) / 1000);
660 NetWriteIP(&bp->bp_ciaddr, 0);
661 NetWriteIP(&bp->bp_yiaddr, 0);
662 NetWriteIP(&bp->bp_siaddr, 0);
663 NetWriteIP(&bp->bp_giaddr, 0);
664 memcpy (bp->bp_chaddr, NetOurEther, 6);
665 copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file));
666
667 /* Request additional information from the BOOTP/DHCP server */
668#if defined(CONFIG_CMD_DHCP)
669 ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0);
670#else
671 ext_len = BootpExtended((u8 *)bp->bp_vend);
672#endif
673
674 /*
675 * Bootp ID is the lower 4 bytes of our ethernet address
676 * plus the current time in ms.
677 */
678 BootpID = ((ulong)NetOurEther[2] << 24)
679 | ((ulong)NetOurEther[3] << 16)
680 | ((ulong)NetOurEther[4] << 8)
681 | (ulong)NetOurEther[5];
682 BootpID += get_timer(0);
683 BootpID = htonl(BootpID);
684 NetCopyLong(&bp->bp_id, &BootpID);
685
686 /*
687 * Calculate proper packet lengths taking into account the
688 * variable size of the options field
689 */
690 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len;
691 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len;
692 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
693 NetSetTimeout(SELECT_TIMEOUT, BootpTimeout);
694
695#if defined(CONFIG_CMD_DHCP)
696 dhcp_state = SELECTING;
697 NetSetHandler(DhcpHandler);
698#else
699 NetSetHandler(BootpHandler);
700#endif
701 NetSendPacket(NetTxPacket, pktlen);
702}
703
704#if defined(CONFIG_CMD_DHCP)
705static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp)
706{
707 uchar *end = popt + BOOTP_HDR_SIZE;
708 int oplen, size;
709
710 while (popt < end && *popt != 0xff) {
711 oplen = *(popt + 1);
712 switch (*popt) {
713 case 1:
714 NetCopyIP (&NetOurSubnetMask, (popt + 2));
715 break;
716#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
717 case 2: /* Time offset */
718 NetCopyLong ((ulong *)&NetTimeOffset, (ulong *) (popt + 2));
719 NetTimeOffset = ntohl (NetTimeOffset);
720 break;
721#endif
722 case 3:
723 NetCopyIP (&NetOurGatewayIP, (popt + 2));
724 break;
725 case 6:
726 NetCopyIP (&NetOurDNSIP, (popt + 2));
727#if defined(CONFIG_BOOTP_DNS2)
728 if (*(popt + 1) > 4) {
729 NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4));
730 }
731#endif
732 break;
733 case 12:
734 size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen);
735 memcpy (&NetOurHostName, popt + 2, size);
736 NetOurHostName[size] = 0;
737 break;
738 case 15: /* Ignore Domain Name Option */
739 break;
740 case 17:
741 size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen);
742 memcpy (&NetOurRootPath, popt + 2, size);
743 NetOurRootPath[size] = 0;
744 break;
745#if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
746 case 42: /* NTP server IP */
747 NetCopyIP (&NetNtpServerIP, (popt + 2));
748 break;
749#endif
750 case 51:
751 NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2));
752 break;
753 case 53: /* Ignore Message Type Option */
754 break;
755 case 54:
756 NetCopyIP (&NetDHCPServerIP, (popt + 2));
757 break;
758 case 58: /* Ignore Renewal Time Option */
759 break;
760 case 59: /* Ignore Rebinding Time Option */
761 break;
762 case 66: /* Ignore TFTP server name */
763 break;
764 case 67: /* vendor opt bootfile */
765 /*
766 * I can't use dhcp_vendorex_proc here because I need
767 * to write into the bootp packet - even then I had to
768 * pass the bootp packet pointer into here as the
769 * second arg
770 */
771 size = truncate_sz ("Opt Boot File",
772 sizeof(bp->bp_file),
773 oplen);
774 if (bp->bp_file[0] == '\0' && size > 0) {
775 /*
776 * only use vendor boot file if we didn't
777 * receive a boot file in the main non-vendor
778 * part of the packet - god only knows why
779 * some vendors chose not to use this perfectly
780 * good spot to store the boot file (join on
781 * Tru64 Unix) it seems mind bogglingly crazy
782 * to me
783 */
784 printf("*** WARNING: using vendor "
785 "optional boot file\n");
786 memcpy(bp->bp_file, popt + 2, size);
787 bp->bp_file[size] = '\0';
788 }
789 break;
790 default:
791#if defined(CONFIG_BOOTP_VENDOREX)
792 if (dhcp_vendorex_proc (popt))
793 break;
794#endif
795 printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt);
796 break;
797 }
798 popt += oplen + 2; /* Process next option */
799 }
800}
801
802static int DhcpMessageType(unsigned char *popt)
803{
804 if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC))
805 return -1;
806
807 popt += 4;
808 while ( *popt != 0xff ) {
809 if ( *popt == 53 ) /* DHCP Message Type */
810 return *(popt + 2);
811 popt += *(popt + 1) + 2; /* Scan through all options */
812 }
813 return -1;
814}
815
816static void DhcpSendRequestPkt(Bootp_t *bp_offer)
817{
818 volatile uchar *pkt, *iphdr;
819 Bootp_t *bp;
820 int pktlen, iplen, extlen;
821 IPaddr_t OfferedIP;
822
823 debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n");
824 pkt = NetTxPacket;
825 memset ((void*)pkt, 0, PKTSIZE);
826
827 pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP);
828
829 iphdr = pkt; /* We'll need this later to set proper pkt size */
830 pkt += IP_HDR_SIZE;
831
832 bp = (Bootp_t *)pkt;
833 bp->bp_op = OP_BOOTREQUEST;
834 bp->bp_htype = HWT_ETHER;
835 bp->bp_hlen = HWL_ETHER;
836 bp->bp_hops = 0;
837 bp->bp_secs = htons(get_timer(0) / 1000);
838 /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by
839 * the server yet */
840
841 /*
842 * RFC3046 requires Relay Agents to discard packets with
843 * nonzero and offered giaddr
844 */
845 NetWriteIP(&bp->bp_giaddr, 0);
846
847 memcpy (bp->bp_chaddr, NetOurEther, 6);
848
849 /*
850 * ID is the id of the OFFER packet
851 */
852
853 NetCopyLong(&bp->bp_id, &bp_offer->bp_id);
854
855 /*
856 * Copy options from OFFER packet if present
857 */
858
859 /* Copy offered IP into the parameters request list */
860 NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr);
861 extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP);
862
863 pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen;
864 iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen;
865 NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen);
866
867 debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
868#ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
869 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
870#endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
871 NetSendPacket(NetTxPacket, pktlen);
872}
873
874/*
875 * Handle DHCP received packets.
876 */
877static void
878DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
879{
880 Bootp_t *bp = (Bootp_t *)pkt;
881
882 debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
883 src, dest, len, dhcp_state);
884
885 if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */
886 return;
887
888 debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n",
889 src, dest, len, dhcp_state);
890
891 switch (dhcp_state) {
892 case SELECTING:
893 /*
894 * Wait an appropriate time for any potential DHCPOFFER packets
895 * to arrive. Then select one, and generate DHCPREQUEST response.
896 * If filename is in format we recognize, assume it is a valid
897 * OFFER from a server we want.
898 */
899 debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
900#ifdef CONFIG_SYS_BOOTFILE_PREFIX
901 if (strncmp(bp->bp_file,
902 CONFIG_SYS_BOOTFILE_PREFIX,
903 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) {
904#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
905
906 debug ("TRANSITIONING TO REQUESTING STATE\n");
907 dhcp_state = REQUESTING;
908
909 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
910 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
911
912 NetSetTimeout(TIMEOUT, BootpTimeout);
913 DhcpSendRequestPkt(bp);
914#ifdef CONFIG_SYS_BOOTFILE_PREFIX
915 }
916#endif /* CONFIG_SYS_BOOTFILE_PREFIX */
917
918 return;
919 break;
920 case REQUESTING:
921 debug ("DHCP State: REQUESTING\n");
922
923 if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) {
924 char *s;
925
926 if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
927 DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
928 BootpCopyNetParams(bp); /* Store net params from reply */
929 dhcp_state = BOUND;
930 printf ("DHCP client bound to address %pI4\n", &NetOurIP);
931
932 /* Obey the 'autoload' setting */
933 if ((s = getenv("autoload")) != NULL) {
934 if (*s == 'n') {
935 /*
936 * Just use BOOTP to configure system;
937 * Do not use TFTP to load the bootfile.
938 */
939 NetState = NETLOOP_SUCCESS;
940 return;
941#if defined(CONFIG_CMD_NFS)
942 } else if (strcmp(s, "NFS") == 0) {
943 /*
944 * Use NFS to load the bootfile.
945 */
946 NfsStart();
947 return;
948#endif
949 }
950 }
951 TftpStart();
952 return;
953 }
954 break;
955 case BOUND:
956 /* DHCP client bound to address */
957 break;
958 default:
959 puts ("DHCP: INVALID STATE\n");
960 break;
961 }
962
963}
964
965void DhcpRequest(void)
966{
967 BootpRequest();
968}
969#endif /* CONFIG_CMD_DHCP */
970
971#endif /* CONFIG_CMD_NET */
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