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distro: Add efi pxe boot code
[project/bcm63xx/u-boot.git] / net / bootp.c
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 #include <common.h>
12 #include <command.h>
13 #include <efi_loader.h>
14 #include <net.h>
15 #include <net/tftp.h>
16 #include "bootp.h"
17 #include "nfs.h"
18 #ifdef CONFIG_STATUS_LED
19 #include <status_led.h>
20 #endif
21 #ifdef CONFIG_BOOTP_RANDOM_DELAY
22 #include "net_rand.h"
23 #endif
24
25 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
26
27 /*
28 * The timeout for the initial BOOTP/DHCP request used to be described by a
29 * counter of fixed-length timeout periods. TIMEOUT_COUNT represents
30 * that counter
31 *
32 * Now that the timeout periods are variable (exponential backoff and retry)
33 * we convert the timeout count to the absolute time it would have take to
34 * execute that many retries, and keep sending retry packets until that time
35 * is reached.
36 */
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 #define TIMEOUT_MS ((3 + (TIMEOUT_COUNT * 5)) * 1000)
43
44 #define PORT_BOOTPS 67 /* BOOTP server UDP port */
45 #define PORT_BOOTPC 68 /* BOOTP client UDP port */
46
47 #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
48 #define CONFIG_DHCP_MIN_EXT_LEN 64
49 #endif
50
51 #ifndef CONFIG_BOOTP_ID_CACHE_SIZE
52 #define CONFIG_BOOTP_ID_CACHE_SIZE 4
53 #endif
54
55 u32 bootp_ids[CONFIG_BOOTP_ID_CACHE_SIZE];
56 unsigned int bootp_num_ids;
57 int bootp_try;
58 ulong bootp_start;
59 ulong bootp_timeout;
60 char net_nis_domain[32] = {0,}; /* Our NIS domain */
61 char net_hostname[32] = {0,}; /* Our hostname */
62 char net_root_path[64] = {0,}; /* Our bootpath */
63
64 static ulong time_taken_max;
65
66 #if defined(CONFIG_CMD_DHCP)
67 static dhcp_state_t dhcp_state = INIT;
68 static u32 dhcp_leasetime;
69 static struct in_addr dhcp_server_ip;
70 static u8 dhcp_option_overload;
71 #define OVERLOAD_FILE 1
72 #define OVERLOAD_SNAME 2
73 static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
74 unsigned src, unsigned len);
75
76 /* For Debug */
77 #if 0
78 static char *dhcpmsg2str(int type)
79 {
80 switch (type) {
81 case 1: return "DHCPDISCOVER"; break;
82 case 2: return "DHCPOFFER"; break;
83 case 3: return "DHCPREQUEST"; break;
84 case 4: return "DHCPDECLINE"; break;
85 case 5: return "DHCPACK"; break;
86 case 6: return "DHCPNACK"; break;
87 case 7: return "DHCPRELEASE"; break;
88 default: return "UNKNOWN/INVALID MSG TYPE"; break;
89 }
90 }
91 #endif
92 #endif
93
94 static void bootp_add_id(ulong id)
95 {
96 if (bootp_num_ids >= ARRAY_SIZE(bootp_ids)) {
97 size_t size = sizeof(bootp_ids) - sizeof(id);
98
99 memmove(bootp_ids, &bootp_ids[1], size);
100 bootp_ids[bootp_num_ids - 1] = id;
101 } else {
102 bootp_ids[bootp_num_ids] = id;
103 bootp_num_ids++;
104 }
105 }
106
107 static bool bootp_match_id(ulong id)
108 {
109 unsigned int i;
110
111 for (i = 0; i < bootp_num_ids; i++)
112 if (bootp_ids[i] == id)
113 return true;
114
115 return false;
116 }
117
118 static int check_reply_packet(uchar *pkt, unsigned dest, unsigned src,
119 unsigned len)
120 {
121 struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
122 int retval = 0;
123
124 if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
125 retval = -1;
126 else if (len < sizeof(struct bootp_hdr) - OPT_FIELD_SIZE)
127 retval = -2;
128 else if (bp->bp_op != OP_BOOTREPLY)
129 retval = -3;
130 else if (bp->bp_htype != HWT_ETHER)
131 retval = -4;
132 else if (bp->bp_hlen != HWL_ETHER)
133 retval = -5;
134 else if (!bootp_match_id(net_read_u32(&bp->bp_id)))
135 retval = -6;
136 else if (memcmp(bp->bp_chaddr, net_ethaddr, HWL_ETHER) != 0)
137 retval = -7;
138
139 debug("Filtering pkt = %d\n", retval);
140
141 return retval;
142 }
143
144 /*
145 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
146 */
147 static void store_net_params(struct bootp_hdr *bp)
148 {
149 #if !defined(CONFIG_BOOTP_SERVERIP)
150 struct in_addr tmp_ip;
151
152 net_copy_ip(&tmp_ip, &bp->bp_siaddr);
153 if (tmp_ip.s_addr != 0)
154 net_copy_ip(&net_server_ip, &bp->bp_siaddr);
155 memcpy(net_server_ethaddr,
156 ((struct ethernet_hdr *)net_rx_packet)->et_src, 6);
157 if (
158 #if defined(CONFIG_CMD_DHCP)
159 !(dhcp_option_overload & OVERLOAD_FILE) &&
160 #endif
161 (strlen(bp->bp_file) > 0)) {
162 copy_filename(net_boot_file_name, bp->bp_file,
163 sizeof(net_boot_file_name));
164 }
165
166 debug("net_boot_file_name: %s\n", net_boot_file_name);
167
168 /* Propagate to environment:
169 * don't delete exising entry when BOOTP / DHCP reply does
170 * not contain a new value
171 */
172 if (*net_boot_file_name)
173 setenv("bootfile", net_boot_file_name);
174 #endif
175 net_copy_ip(&net_ip, &bp->bp_yiaddr);
176 }
177
178 static int truncate_sz(const char *name, int maxlen, int curlen)
179 {
180 if (curlen >= maxlen) {
181 printf("*** WARNING: %s is too long (%d - max: %d)"
182 " - truncated\n", name, curlen, maxlen);
183 curlen = maxlen - 1;
184 }
185 return curlen;
186 }
187
188 #if !defined(CONFIG_CMD_DHCP)
189
190 static void bootp_process_vendor_field(u8 *ext)
191 {
192 int size = *(ext + 1);
193
194 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
195 *(ext + 1));
196
197 net_boot_file_expected_size_in_blocks = 0;
198
199 switch (*ext) {
200 /* Fixed length fields */
201 case 1: /* Subnet mask */
202 if (net_netmask.s_addr == 0)
203 net_copy_ip(&net_netmask, (struct in_addr *)(ext + 2));
204 break;
205 case 2: /* Time offset - Not yet supported */
206 break;
207 /* Variable length fields */
208 case 3: /* Gateways list */
209 if (net_gateway.s_addr == 0)
210 net_copy_ip(&net_gateway, (struct in_addr *)(ext + 2));
211 break;
212 case 4: /* Time server - Not yet supported */
213 break;
214 case 5: /* IEN-116 name server - Not yet supported */
215 break;
216 case 6:
217 if (net_dns_server.s_addr == 0)
218 net_copy_ip(&net_dns_server,
219 (struct in_addr *)(ext + 2));
220 #if defined(CONFIG_BOOTP_DNS2)
221 if ((net_dns_server2.s_addr == 0) && (size > 4))
222 net_copy_ip(&net_dns_server2,
223 (struct in_addr *)(ext + 2 + 4));
224 #endif
225 break;
226 case 7: /* Log server - Not yet supported */
227 break;
228 case 8: /* Cookie/Quote server - Not yet supported */
229 break;
230 case 9: /* LPR server - Not yet supported */
231 break;
232 case 10: /* Impress server - Not yet supported */
233 break;
234 case 11: /* RPL server - Not yet supported */
235 break;
236 case 12: /* Host name */
237 if (net_hostname[0] == 0) {
238 size = truncate_sz("Host Name",
239 sizeof(net_hostname), size);
240 memcpy(&net_hostname, ext + 2, size);
241 net_hostname[size] = 0;
242 }
243 break;
244 case 13: /* Boot file size */
245 if (size == 2)
246 net_boot_file_expected_size_in_blocks =
247 ntohs(*(ushort *)(ext + 2));
248 else if (size == 4)
249 net_boot_file_expected_size_in_blocks =
250 ntohl(*(ulong *)(ext + 2));
251 break;
252 case 14: /* Merit dump file - Not yet supported */
253 break;
254 case 15: /* Domain name - Not yet supported */
255 break;
256 case 16: /* Swap server - Not yet supported */
257 break;
258 case 17: /* Root path */
259 if (net_root_path[0] == 0) {
260 size = truncate_sz("Root Path",
261 sizeof(net_root_path), size);
262 memcpy(&net_root_path, ext + 2, size);
263 net_root_path[size] = 0;
264 }
265 break;
266 case 18: /* Extension path - Not yet supported */
267 /*
268 * This can be used to send the information of the
269 * vendor area in another file that the client can
270 * access via TFTP.
271 */
272 break;
273 /* IP host layer fields */
274 case 40: /* NIS Domain name */
275 if (net_nis_domain[0] == 0) {
276 size = truncate_sz("NIS Domain Name",
277 sizeof(net_nis_domain), size);
278 memcpy(&net_nis_domain, ext + 2, size);
279 net_nis_domain[size] = 0;
280 }
281 break;
282 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
283 case 42: /* NTP server IP */
284 net_copy_ip(&net_ntp_server, (struct in_addr *)(ext + 2));
285 break;
286 #endif
287 /* Application layer fields */
288 case 43: /* Vendor specific info - Not yet supported */
289 /*
290 * Binary information to exchange specific
291 * product information.
292 */
293 break;
294 /* Reserved (custom) fields (128..254) */
295 }
296 }
297
298 static void bootp_process_vendor(u8 *ext, int size)
299 {
300 u8 *end = ext + size;
301
302 debug("[BOOTP] Checking extension (%d bytes)...\n", size);
303
304 while ((ext < end) && (*ext != 0xff)) {
305 if (*ext == 0) {
306 ext++;
307 } else {
308 u8 *opt = ext;
309
310 ext += ext[1] + 2;
311 if (ext <= end)
312 bootp_process_vendor_field(opt);
313 }
314 }
315
316 debug("[BOOTP] Received fields:\n");
317 if (net_netmask.s_addr)
318 debug("net_netmask : %pI4\n", &net_netmask);
319
320 if (net_gateway.s_addr)
321 debug("net_gateway : %pI4", &net_gateway);
322
323 if (net_boot_file_expected_size_in_blocks)
324 debug("net_boot_file_expected_size_in_blocks : %d\n",
325 net_boot_file_expected_size_in_blocks);
326
327 if (net_hostname[0])
328 debug("net_hostname : %s\n", net_hostname);
329
330 if (net_root_path[0])
331 debug("net_root_path : %s\n", net_root_path);
332
333 if (net_nis_domain[0])
334 debug("net_nis_domain : %s\n", net_nis_domain);
335
336 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
337 if (net_ntp_server)
338 debug("net_ntp_server : %pI4\n", &net_ntp_server);
339 #endif
340 }
341
342 /*
343 * Handle a BOOTP received packet.
344 */
345 static void bootp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
346 unsigned src, unsigned len)
347 {
348 struct bootp_hdr *bp;
349
350 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
351 src, dest, len, sizeof(struct bootp_hdr));
352
353 bp = (struct bootp_hdr *)pkt;
354
355 /* Filter out pkts we don't want */
356 if (check_reply_packet(pkt, dest, src, len))
357 return;
358
359 /*
360 * Got a good BOOTP reply. Copy the data into our variables.
361 */
362 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
363 status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
364 #endif
365
366 store_net_params(bp); /* Store net parameters from reply */
367
368 /* Retrieve extended information (we must parse the vendor area) */
369 if (net_read_u32((u32 *)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
370 bootp_process_vendor((uchar *)&bp->bp_vend[4], len);
371
372 net_set_timeout_handler(0, (thand_f *)0);
373 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop");
374
375 debug("Got good BOOTP\n");
376
377 net_auto_load();
378 }
379 #endif
380
381 /*
382 * Timeout on BOOTP/DHCP request.
383 */
384 static void bootp_timeout_handler(void)
385 {
386 ulong time_taken = get_timer(bootp_start);
387
388 if (time_taken >= time_taken_max) {
389 #ifdef CONFIG_BOOTP_MAY_FAIL
390 puts("\nRetry time exceeded\n");
391 net_set_state(NETLOOP_FAIL);
392 #else
393 puts("\nRetry time exceeded; starting again\n");
394 net_start_again();
395 #endif
396 } else {
397 bootp_timeout *= 2;
398 if (bootp_timeout > 2000)
399 bootp_timeout = 2000;
400 net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
401 bootp_request();
402 }
403 }
404
405 #define put_vci(e, str) \
406 do { \
407 size_t vci_strlen = strlen(str); \
408 *e++ = 60; /* Vendor Class Identifier */ \
409 *e++ = vci_strlen; \
410 memcpy(e, str, vci_strlen); \
411 e += vci_strlen; \
412 } while (0)
413
414 static u8 *add_vci(u8 *e)
415 {
416 char *vci = NULL;
417 char *env_vci = getenv("bootp_vci");
418
419 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
420 vci = CONFIG_SPL_NET_VCI_STRING;
421 #elif defined(CONFIG_BOOTP_VCI_STRING)
422 vci = CONFIG_BOOTP_VCI_STRING;
423 #endif
424
425 if (env_vci)
426 vci = env_vci;
427
428 if (vci)
429 put_vci(e, vci);
430
431 return e;
432 }
433
434 /*
435 * Initialize BOOTP extension fields in the request.
436 */
437 #if defined(CONFIG_CMD_DHCP)
438 static int dhcp_extended(u8 *e, int message_type, struct in_addr server_ip,
439 struct in_addr requested_ip)
440 {
441 u8 *start = e;
442 u8 *cnt;
443 #if defined(CONFIG_BOOTP_PXE)
444 char *uuid;
445 u16 clientarch;
446 #endif
447
448 #if defined(CONFIG_BOOTP_VENDOREX)
449 u8 *x;
450 #endif
451 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
452 char *hostname;
453 #endif
454
455 *e++ = 99; /* RFC1048 Magic Cookie */
456 *e++ = 130;
457 *e++ = 83;
458 *e++ = 99;
459
460 *e++ = 53; /* DHCP Message Type */
461 *e++ = 1;
462 *e++ = message_type;
463
464 *e++ = 57; /* Maximum DHCP Message Size */
465 *e++ = 2;
466 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 8;
467 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
468
469 if (server_ip.s_addr) {
470 int tmp = ntohl(server_ip.s_addr);
471
472 *e++ = 54; /* ServerID */
473 *e++ = 4;
474 *e++ = tmp >> 24;
475 *e++ = tmp >> 16;
476 *e++ = tmp >> 8;
477 *e++ = tmp & 0xff;
478 }
479
480 if (requested_ip.s_addr) {
481 int tmp = ntohl(requested_ip.s_addr);
482
483 *e++ = 50; /* Requested IP */
484 *e++ = 4;
485 *e++ = tmp >> 24;
486 *e++ = tmp >> 16;
487 *e++ = tmp >> 8;
488 *e++ = tmp & 0xff;
489 }
490 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
491 hostname = getenv("hostname");
492 if (hostname) {
493 int hostnamelen = strlen(hostname);
494
495 *e++ = 12; /* Hostname */
496 *e++ = hostnamelen;
497 memcpy(e, hostname, hostnamelen);
498 e += hostnamelen;
499 }
500 #endif
501
502 #if defined(CONFIG_BOOTP_PXE)
503 clientarch = CONFIG_BOOTP_PXE_CLIENTARCH;
504 *e++ = 93; /* Client System Architecture */
505 *e++ = 2;
506 *e++ = (clientarch >> 8) & 0xff;
507 *e++ = clientarch & 0xff;
508
509 *e++ = 94; /* Client Network Interface Identifier */
510 *e++ = 3;
511 *e++ = 1; /* type field for UNDI */
512 *e++ = 0; /* major revision */
513 *e++ = 0; /* minor revision */
514
515 uuid = getenv("pxeuuid");
516
517 if (uuid) {
518 if (uuid_str_valid(uuid)) {
519 *e++ = 97; /* Client Machine Identifier */
520 *e++ = 17;
521 *e++ = 0; /* type 0 - UUID */
522
523 uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD);
524 e += 16;
525 } else {
526 printf("Invalid pxeuuid: %s\n", uuid);
527 }
528 }
529 #endif
530
531 e = add_vci(e);
532
533 #if defined(CONFIG_BOOTP_VENDOREX)
534 x = dhcp_vendorex_prep(e);
535 if (x)
536 return x - start;
537 #endif
538
539 *e++ = 55; /* Parameter Request List */
540 cnt = e++; /* Pointer to count of requested items */
541 *cnt = 0;
542 #if defined(CONFIG_BOOTP_SUBNETMASK)
543 *e++ = 1; /* Subnet Mask */
544 *cnt += 1;
545 #endif
546 #if defined(CONFIG_BOOTP_TIMEOFFSET)
547 *e++ = 2;
548 *cnt += 1;
549 #endif
550 #if defined(CONFIG_BOOTP_GATEWAY)
551 *e++ = 3; /* Router Option */
552 *cnt += 1;
553 #endif
554 #if defined(CONFIG_BOOTP_DNS)
555 *e++ = 6; /* DNS Server(s) */
556 *cnt += 1;
557 #endif
558 #if defined(CONFIG_BOOTP_HOSTNAME)
559 *e++ = 12; /* Hostname */
560 *cnt += 1;
561 #endif
562 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
563 *e++ = 13; /* Boot File Size */
564 *cnt += 1;
565 #endif
566 #if defined(CONFIG_BOOTP_BOOTPATH)
567 *e++ = 17; /* Boot path */
568 *cnt += 1;
569 #endif
570 #if defined(CONFIG_BOOTP_NISDOMAIN)
571 *e++ = 40; /* NIS Domain name request */
572 *cnt += 1;
573 #endif
574 #if defined(CONFIG_BOOTP_NTPSERVER)
575 *e++ = 42;
576 *cnt += 1;
577 #endif
578 /* no options, so back up to avoid sending an empty request list */
579 if (*cnt == 0)
580 e -= 2;
581
582 *e++ = 255; /* End of the list */
583
584 /* Pad to minimal length */
585 #ifdef CONFIG_DHCP_MIN_EXT_LEN
586 while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN)
587 *e++ = 0;
588 #endif
589
590 return e - start;
591 }
592
593 #else
594 /*
595 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
596 */
597 static int bootp_extended(u8 *e)
598 {
599 u8 *start = e;
600
601 *e++ = 99; /* RFC1048 Magic Cookie */
602 *e++ = 130;
603 *e++ = 83;
604 *e++ = 99;
605
606 #if defined(CONFIG_CMD_DHCP)
607 *e++ = 53; /* DHCP Message Type */
608 *e++ = 1;
609 *e++ = DHCP_DISCOVER;
610
611 *e++ = 57; /* Maximum DHCP Message Size */
612 *e++ = 2;
613 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 16;
614 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
615 #endif
616
617 add_vci(e);
618
619 #if defined(CONFIG_BOOTP_SUBNETMASK)
620 *e++ = 1; /* Subnet mask request */
621 *e++ = 4;
622 e += 4;
623 #endif
624
625 #if defined(CONFIG_BOOTP_GATEWAY)
626 *e++ = 3; /* Default gateway request */
627 *e++ = 4;
628 e += 4;
629 #endif
630
631 #if defined(CONFIG_BOOTP_DNS)
632 *e++ = 6; /* Domain Name Server */
633 *e++ = 4;
634 e += 4;
635 #endif
636
637 #if defined(CONFIG_BOOTP_HOSTNAME)
638 *e++ = 12; /* Host name request */
639 *e++ = 32;
640 e += 32;
641 #endif
642
643 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
644 *e++ = 13; /* Boot file size */
645 *e++ = 2;
646 e += 2;
647 #endif
648
649 #if defined(CONFIG_BOOTP_BOOTPATH)
650 *e++ = 17; /* Boot path */
651 *e++ = 32;
652 e += 32;
653 #endif
654
655 #if defined(CONFIG_BOOTP_NISDOMAIN)
656 *e++ = 40; /* NIS Domain name request */
657 *e++ = 32;
658 e += 32;
659 #endif
660 #if defined(CONFIG_BOOTP_NTPSERVER)
661 *e++ = 42;
662 *e++ = 4;
663 e += 4;
664 #endif
665
666 *e++ = 255; /* End of the list */
667
668 return e - start;
669 }
670 #endif
671
672 void bootp_reset(void)
673 {
674 bootp_num_ids = 0;
675 bootp_try = 0;
676 bootp_start = get_timer(0);
677 bootp_timeout = 250;
678 }
679
680 void bootp_request(void)
681 {
682 uchar *pkt, *iphdr;
683 struct bootp_hdr *bp;
684 int extlen, pktlen, iplen;
685 int eth_hdr_size;
686 #ifdef CONFIG_BOOTP_RANDOM_DELAY
687 ulong rand_ms;
688 #endif
689 u32 bootp_id;
690 struct in_addr zero_ip;
691 struct in_addr bcast_ip;
692 char *ep; /* Environment pointer */
693
694 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start");
695 #if defined(CONFIG_CMD_DHCP)
696 dhcp_state = INIT;
697 #endif
698
699 ep = getenv("bootpretryperiod");
700 if (ep != NULL)
701 time_taken_max = simple_strtoul(ep, NULL, 10);
702 else
703 time_taken_max = TIMEOUT_MS;
704
705 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
706 if (bootp_try == 0)
707 srand_mac();
708
709 if (bootp_try <= 2) /* Start with max 1024 * 1ms */
710 rand_ms = rand() >> (22 - bootp_try);
711 else /* After 3rd BOOTP request max 8192 * 1ms */
712 rand_ms = rand() >> 19;
713
714 printf("Random delay: %ld ms...\n", rand_ms);
715 mdelay(rand_ms);
716
717 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
718
719 printf("BOOTP broadcast %d\n", ++bootp_try);
720 pkt = net_tx_packet;
721 memset((void *)pkt, 0, PKTSIZE);
722
723 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
724 pkt += eth_hdr_size;
725
726 /*
727 * Next line results in incorrect packet size being transmitted,
728 * resulting in errors in some DHCP servers, reporting missing bytes.
729 * Size must be set in packet header after extension length has been
730 * determined.
731 * C. Hallinan, DS4.COM, Inc.
732 */
733 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
734 sizeof (struct bootp_hdr)); */
735 iphdr = pkt; /* We need this later for net_set_udp_header() */
736 pkt += IP_UDP_HDR_SIZE;
737
738 bp = (struct bootp_hdr *)pkt;
739 bp->bp_op = OP_BOOTREQUEST;
740 bp->bp_htype = HWT_ETHER;
741 bp->bp_hlen = HWL_ETHER;
742 bp->bp_hops = 0;
743 /*
744 * according to RFC1542, should be 0 on first request, secs since
745 * first request otherwise
746 */
747 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
748 zero_ip.s_addr = 0;
749 net_write_ip(&bp->bp_ciaddr, zero_ip);
750 net_write_ip(&bp->bp_yiaddr, zero_ip);
751 net_write_ip(&bp->bp_siaddr, zero_ip);
752 net_write_ip(&bp->bp_giaddr, zero_ip);
753 memcpy(bp->bp_chaddr, net_ethaddr, 6);
754 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
755
756 /* Request additional information from the BOOTP/DHCP server */
757 #if defined(CONFIG_CMD_DHCP)
758 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_DISCOVER, zero_ip,
759 zero_ip);
760 #else
761 extlen = bootp_extended((u8 *)bp->bp_vend);
762 #endif
763
764 /*
765 * Bootp ID is the lower 4 bytes of our ethernet address
766 * plus the current time in ms.
767 */
768 bootp_id = ((u32)net_ethaddr[2] << 24)
769 | ((u32)net_ethaddr[3] << 16)
770 | ((u32)net_ethaddr[4] << 8)
771 | (u32)net_ethaddr[5];
772 bootp_id += get_timer(0);
773 bootp_id = htonl(bootp_id);
774 bootp_add_id(bootp_id);
775 net_copy_u32(&bp->bp_id, &bootp_id);
776
777 /*
778 * Calculate proper packet lengths taking into account the
779 * variable size of the options field
780 */
781 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
782 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
783 bcast_ip.s_addr = 0xFFFFFFFFL;
784 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
785 net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
786
787 #if defined(CONFIG_CMD_DHCP)
788 dhcp_state = SELECTING;
789 net_set_udp_handler(dhcp_handler);
790 #else
791 net_set_udp_handler(bootp_handler);
792 #endif
793 net_send_packet(net_tx_packet, pktlen);
794 }
795
796 #if defined(CONFIG_CMD_DHCP)
797 static void dhcp_process_options(uchar *popt, uchar *end)
798 {
799 int oplen, size;
800 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
801 int *to_ptr;
802 #endif
803
804 while (popt < end && *popt != 0xff) {
805 oplen = *(popt + 1);
806 switch (*popt) {
807 case 0:
808 oplen = -1; /* Pad omits len byte */
809 break;
810 case 1:
811 net_copy_ip(&net_netmask, (popt + 2));
812 break;
813 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
814 case 2: /* Time offset */
815 to_ptr = &net_ntp_time_offset;
816 net_copy_u32((u32 *)to_ptr, (u32 *)(popt + 2));
817 net_ntp_time_offset = ntohl(net_ntp_time_offset);
818 break;
819 #endif
820 case 3:
821 net_copy_ip(&net_gateway, (popt + 2));
822 break;
823 case 6:
824 net_copy_ip(&net_dns_server, (popt + 2));
825 #if defined(CONFIG_BOOTP_DNS2)
826 if (*(popt + 1) > 4)
827 net_copy_ip(&net_dns_server2, (popt + 2 + 4));
828 #endif
829 break;
830 case 12:
831 size = truncate_sz("Host Name",
832 sizeof(net_hostname), oplen);
833 memcpy(&net_hostname, popt + 2, size);
834 net_hostname[size] = 0;
835 break;
836 case 15: /* Ignore Domain Name Option */
837 break;
838 case 17:
839 size = truncate_sz("Root Path",
840 sizeof(net_root_path), oplen);
841 memcpy(&net_root_path, popt + 2, size);
842 net_root_path[size] = 0;
843 break;
844 case 28: /* Ignore Broadcast Address Option */
845 break;
846 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
847 case 42: /* NTP server IP */
848 net_copy_ip(&net_ntp_server, (popt + 2));
849 break;
850 #endif
851 case 51:
852 net_copy_u32(&dhcp_leasetime, (u32 *)(popt + 2));
853 break;
854 case 52:
855 dhcp_option_overload = popt[2];
856 break;
857 case 53: /* Ignore Message Type Option */
858 break;
859 case 54:
860 net_copy_ip(&dhcp_server_ip, (popt + 2));
861 break;
862 case 58: /* Ignore Renewal Time Option */
863 break;
864 case 59: /* Ignore Rebinding Time Option */
865 break;
866 case 66: /* Ignore TFTP server name */
867 break;
868 case 67: /* Bootfile option */
869 size = truncate_sz("Bootfile",
870 sizeof(net_boot_file_name), oplen);
871 memcpy(&net_boot_file_name, popt + 2, size);
872 net_boot_file_name[size] = 0;
873 break;
874 default:
875 #if defined(CONFIG_BOOTP_VENDOREX)
876 if (dhcp_vendorex_proc(popt))
877 break;
878 #endif
879 printf("*** Unhandled DHCP Option in OFFER/ACK:"
880 " %d\n", *popt);
881 break;
882 }
883 popt += oplen + 2; /* Process next option */
884 }
885 }
886
887 static void dhcp_packet_process_options(struct bootp_hdr *bp)
888 {
889 uchar *popt = (uchar *)&bp->bp_vend[4];
890 uchar *end = popt + BOOTP_HDR_SIZE;
891
892 if (net_read_u32((u32 *)&bp->bp_vend[0]) != htonl(BOOTP_VENDOR_MAGIC))
893 return;
894
895 dhcp_option_overload = 0;
896
897 /*
898 * The 'options' field MUST be interpreted first, 'file' next,
899 * 'sname' last.
900 */
901 dhcp_process_options(popt, end);
902
903 if (dhcp_option_overload & OVERLOAD_FILE) {
904 popt = (uchar *)bp->bp_file;
905 end = popt + sizeof(bp->bp_file);
906 dhcp_process_options(popt, end);
907 }
908
909 if (dhcp_option_overload & OVERLOAD_SNAME) {
910 popt = (uchar *)bp->bp_sname;
911 end = popt + sizeof(bp->bp_sname);
912 dhcp_process_options(popt, end);
913 }
914 }
915
916 static int dhcp_message_type(unsigned char *popt)
917 {
918 if (net_read_u32((u32 *)popt) != htonl(BOOTP_VENDOR_MAGIC))
919 return -1;
920
921 popt += 4;
922 while (*popt != 0xff) {
923 if (*popt == 53) /* DHCP Message Type */
924 return *(popt + 2);
925 if (*popt == 0) {
926 /* Pad */
927 popt += 1;
928 } else {
929 /* Scan through all options */
930 popt += *(popt + 1) + 2;
931 }
932 }
933 return -1;
934 }
935
936 static void dhcp_send_request_packet(struct bootp_hdr *bp_offer)
937 {
938 uchar *pkt, *iphdr;
939 struct bootp_hdr *bp;
940 int pktlen, iplen, extlen;
941 int eth_hdr_size;
942 struct in_addr offered_ip;
943 struct in_addr zero_ip;
944 struct in_addr bcast_ip;
945
946 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
947 pkt = net_tx_packet;
948 memset((void *)pkt, 0, PKTSIZE);
949
950 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
951 pkt += eth_hdr_size;
952
953 iphdr = pkt; /* We'll need this later to set proper pkt size */
954 pkt += IP_UDP_HDR_SIZE;
955
956 bp = (struct bootp_hdr *)pkt;
957 bp->bp_op = OP_BOOTREQUEST;
958 bp->bp_htype = HWT_ETHER;
959 bp->bp_hlen = HWL_ETHER;
960 bp->bp_hops = 0;
961 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
962 /* Do not set the client IP, your IP, or server IP yet, since it
963 * hasn't been ACK'ed by the server yet */
964
965 /*
966 * RFC3046 requires Relay Agents to discard packets with
967 * nonzero and offered giaddr
968 */
969 zero_ip.s_addr = 0;
970 net_write_ip(&bp->bp_giaddr, zero_ip);
971
972 memcpy(bp->bp_chaddr, net_ethaddr, 6);
973 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
974
975 /*
976 * ID is the id of the OFFER packet
977 */
978
979 net_copy_u32(&bp->bp_id, &bp_offer->bp_id);
980
981 /*
982 * Copy options from OFFER packet if present
983 */
984
985 /* Copy offered IP into the parameters request list */
986 net_copy_ip(&offered_ip, &bp_offer->bp_yiaddr);
987 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_REQUEST,
988 dhcp_server_ip, offered_ip);
989
990 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
991 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
992 bcast_ip.s_addr = 0xFFFFFFFFL;
993 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
994
995 #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY
996 udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY);
997 #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */
998 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
999 net_send_packet(net_tx_packet, pktlen);
1000 }
1001
1002 /*
1003 * Handle DHCP received packets.
1004 */
1005 static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
1006 unsigned src, unsigned len)
1007 {
1008 struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
1009
1010 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
1011 src, dest, len, dhcp_state);
1012
1013 /* Filter out pkts we don't want */
1014 if (check_reply_packet(pkt, dest, src, len))
1015 return;
1016
1017 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
1018 "%d\n", src, dest, len, dhcp_state);
1019
1020 if (net_read_ip(&bp->bp_yiaddr).s_addr == 0)
1021 return;
1022
1023 switch (dhcp_state) {
1024 case SELECTING:
1025 /*
1026 * Wait an appropriate time for any potential DHCPOFFER packets
1027 * to arrive. Then select one, and generate DHCPREQUEST
1028 * response. If filename is in format we recognize, assume it
1029 * is a valid OFFER from a server we want.
1030 */
1031 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
1032 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1033 if (strncmp(bp->bp_file,
1034 CONFIG_SYS_BOOTFILE_PREFIX,
1035 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0) {
1036 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1037 dhcp_packet_process_options(bp);
1038 efi_net_set_dhcp_ack(pkt, len);
1039
1040 debug("TRANSITIONING TO REQUESTING STATE\n");
1041 dhcp_state = REQUESTING;
1042
1043 net_set_timeout_handler(5000, bootp_timeout_handler);
1044 dhcp_send_request_packet(bp);
1045 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1046 }
1047 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1048
1049 return;
1050 break;
1051 case REQUESTING:
1052 debug("DHCP State: REQUESTING\n");
1053
1054 if (dhcp_message_type((u8 *)bp->bp_vend) == DHCP_ACK) {
1055 dhcp_packet_process_options(bp);
1056 /* Store net params from reply */
1057 store_net_params(bp);
1058 dhcp_state = BOUND;
1059 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1060 &net_ip, get_timer(bootp_start));
1061 net_set_timeout_handler(0, (thand_f *)0);
1062 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP,
1063 "bootp_stop");
1064
1065 net_auto_load();
1066 return;
1067 }
1068 break;
1069 case BOUND:
1070 /* DHCP client bound to address */
1071 break;
1072 default:
1073 puts("DHCP: INVALID STATE\n");
1074 break;
1075 }
1076 }
1077
1078 void dhcp_request(void)
1079 {
1080 bootp_request();
1081 }
1082 #endif /* CONFIG_CMD_DHCP */
Broadcom-s U-Boot