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configs: imx93-phyboard-segin: Add fastboot support
[thirdparty/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 <bootstage.h>
13 #include <command.h>
14 #include <env.h>
15 #include <efi_loader.h>
16 #include <log.h>
17 #include <net.h>
18 #include <rand.h>
19 #include <uuid.h>
20 #include <linux/delay.h>
21 #include <net/tftp.h>
22 #include "bootp.h"
23 #ifdef CONFIG_LED_STATUS
24 #include <status_led.h>
25 #endif
26 #ifdef CONFIG_BOOTP_RANDOM_DELAY
27 #include "net_rand.h"
28 #endif
29 #include <malloc.h>
30
31 #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */
32
33 /*
34 * The timeout for the initial BOOTP/DHCP request used to be described by a
35 * counter of fixed-length timeout periods. CONFIG_NET_RETRY_COUNT represents
36 * that counter
37 *
38 * Now that the timeout periods are variable (exponential backoff and retry)
39 * we convert the timeout count to the absolute time it would have take to
40 * execute that many retries, and keep sending retry packets until that time
41 * is reached.
42 */
43 #define TIMEOUT_MS ((3 + (CONFIG_NET_RETRY_COUNT * 5)) * 1000)
44
45 #ifndef CFG_DHCP_MIN_EXT_LEN /* minimal length of extension list */
46 #define CFG_DHCP_MIN_EXT_LEN 64
47 #endif
48
49 #ifndef CFG_BOOTP_ID_CACHE_SIZE
50 #define CFG_BOOTP_ID_CACHE_SIZE 4
51 #endif
52
53 u32 bootp_ids[CFG_BOOTP_ID_CACHE_SIZE];
54 unsigned int bootp_num_ids;
55 int bootp_try;
56 ulong bootp_start;
57 ulong bootp_timeout;
58 char net_nis_domain[32] = {0,}; /* Our NIS domain */
59 char net_hostname[32] = {0,}; /* Our hostname */
60 char net_root_path[CONFIG_BOOTP_MAX_ROOT_PATH_LEN] = {0,}; /* Our bootpath */
61
62 static ulong time_taken_max;
63
64 #if defined(CONFIG_CMD_DHCP)
65 static dhcp_state_t dhcp_state = INIT;
66 static u32 dhcp_leasetime;
67 static struct in_addr dhcp_server_ip;
68 static u8 dhcp_option_overload;
69 #define OVERLOAD_FILE 1
70 #define OVERLOAD_SNAME 2
71 static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
72 unsigned src, unsigned len);
73
74 /* For Debug */
75 #if 0
76 static char *dhcpmsg2str(int type)
77 {
78 switch (type) {
79 case 1: return "DHCPDISCOVER"; break;
80 case 2: return "DHCPOFFER"; break;
81 case 3: return "DHCPREQUEST"; break;
82 case 4: return "DHCPDECLINE"; break;
83 case 5: return "DHCPACK"; break;
84 case 6: return "DHCPNACK"; break;
85 case 7: return "DHCPRELEASE"; break;
86 default: return "UNKNOWN/INVALID MSG TYPE"; break;
87 }
88 }
89 #endif
90 #endif
91
92 static void bootp_add_id(ulong id)
93 {
94 if (bootp_num_ids >= ARRAY_SIZE(bootp_ids)) {
95 size_t size = sizeof(bootp_ids) - sizeof(id);
96
97 memmove(bootp_ids, &bootp_ids[1], size);
98 bootp_ids[bootp_num_ids - 1] = id;
99 } else {
100 bootp_ids[bootp_num_ids] = id;
101 bootp_num_ids++;
102 }
103 }
104
105 static bool bootp_match_id(ulong id)
106 {
107 unsigned int i;
108
109 for (i = 0; i < bootp_num_ids; i++)
110 if (bootp_ids[i] == id)
111 return true;
112
113 return false;
114 }
115
116 static int check_reply_packet(uchar *pkt, unsigned dest, unsigned src,
117 unsigned len)
118 {
119 struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
120 int retval = 0;
121
122 if (dest != PORT_BOOTPC || src != PORT_BOOTPS)
123 retval = -1;
124 else if (len < sizeof(struct bootp_hdr) - OPT_FIELD_SIZE)
125 retval = -2;
126 else if (bp->bp_op != OP_BOOTREPLY)
127 retval = -3;
128 else if (bp->bp_htype != HWT_ETHER)
129 retval = -4;
130 else if (bp->bp_hlen != HWL_ETHER)
131 retval = -5;
132 else if (!bootp_match_id(net_read_u32(&bp->bp_id)))
133 retval = -6;
134 else if (memcmp(bp->bp_chaddr, net_ethaddr, HWL_ETHER) != 0)
135 retval = -7;
136
137 debug("Filtering pkt = %d\n", retval);
138
139 return retval;
140 }
141
142 static void store_bootp_params(struct bootp_hdr *bp)
143 {
144 struct in_addr tmp_ip;
145 bool overwrite_serverip = true;
146
147 if (IS_ENABLED(CONFIG_BOOTP_SERVERIP))
148 return;
149
150 #if defined(CONFIG_BOOTP_PREFER_SERVERIP)
151 overwrite_serverip = false;
152 #endif
153
154 net_copy_ip(&tmp_ip, &bp->bp_siaddr);
155 if (tmp_ip.s_addr != 0 && (overwrite_serverip || !net_server_ip.s_addr))
156 net_copy_ip(&net_server_ip, &bp->bp_siaddr);
157 memcpy(net_server_ethaddr,
158 ((struct ethernet_hdr *)net_rx_packet)->et_src, 6);
159 if (
160 #if defined(CONFIG_CMD_DHCP)
161 !(dhcp_option_overload & OVERLOAD_FILE) &&
162 #endif
163 (strlen(bp->bp_file) > 0) &&
164 !net_boot_file_name_explicit) {
165 copy_filename(net_boot_file_name, bp->bp_file,
166 sizeof(net_boot_file_name));
167 }
168
169 debug("net_boot_file_name: %s\n", net_boot_file_name);
170
171 /* Propagate to environment:
172 * don't delete exising entry when BOOTP / DHCP reply does
173 * not contain a new value
174 */
175 if (*net_boot_file_name)
176 env_set("bootfile", net_boot_file_name);
177 }
178
179 /*
180 * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet
181 */
182 static void store_net_params(struct bootp_hdr *bp)
183 {
184 #if !defined(CONFIG_SERVERIP_FROM_PROXYDHCP)
185 store_bootp_params(bp);
186 #endif
187 net_copy_ip(&net_ip, &bp->bp_yiaddr);
188 }
189
190 static int truncate_sz(const char *name, int maxlen, int curlen)
191 {
192 if (curlen >= maxlen) {
193 printf("*** WARNING: %s is too long (%d - max: %d)"
194 " - truncated\n", name, curlen, maxlen);
195 curlen = maxlen - 1;
196 }
197 return curlen;
198 }
199
200 #if !defined(CONFIG_CMD_DHCP)
201
202 static void bootp_process_vendor_field(u8 *ext)
203 {
204 int size = *(ext + 1);
205
206 debug("[BOOTP] Processing extension %d... (%d bytes)\n", *ext,
207 *(ext + 1));
208
209 net_boot_file_expected_size_in_blocks = 0;
210
211 switch (*ext) {
212 /* Fixed length fields */
213 case 1: /* Subnet mask */
214 if (net_netmask.s_addr == 0)
215 net_copy_ip(&net_netmask, (struct in_addr *)(ext + 2));
216 break;
217 case 2: /* Time offset - Not yet supported */
218 break;
219 /* Variable length fields */
220 case 3: /* Gateways list */
221 if (net_gateway.s_addr == 0)
222 net_copy_ip(&net_gateway, (struct in_addr *)(ext + 2));
223 break;
224 case 4: /* Time server - Not yet supported */
225 break;
226 case 5: /* IEN-116 name server - Not yet supported */
227 break;
228 case 6:
229 if (net_dns_server.s_addr == 0)
230 net_copy_ip(&net_dns_server,
231 (struct in_addr *)(ext + 2));
232 #if defined(CONFIG_BOOTP_DNS2)
233 if ((net_dns_server2.s_addr == 0) && (size > 4))
234 net_copy_ip(&net_dns_server2,
235 (struct in_addr *)(ext + 2 + 4));
236 #endif
237 break;
238 case 7: /* Log server - Not yet supported */
239 break;
240 case 8: /* Cookie/Quote server - Not yet supported */
241 break;
242 case 9: /* LPR server - Not yet supported */
243 break;
244 case 10: /* Impress server - Not yet supported */
245 break;
246 case 11: /* RPL server - Not yet supported */
247 break;
248 case 12: /* Host name */
249 if (net_hostname[0] == 0) {
250 size = truncate_sz("Host Name",
251 sizeof(net_hostname), size);
252 memcpy(&net_hostname, ext + 2, size);
253 net_hostname[size] = 0;
254 }
255 break;
256 case 13: /* Boot file size */
257 if (size == 2)
258 net_boot_file_expected_size_in_blocks =
259 ntohs(*(ushort *)(ext + 2));
260 else if (size == 4)
261 net_boot_file_expected_size_in_blocks =
262 ntohl(*(ulong *)(ext + 2));
263 break;
264 case 14: /* Merit dump file - Not yet supported */
265 break;
266 case 15: /* Domain name - Not yet supported */
267 break;
268 case 16: /* Swap server - Not yet supported */
269 break;
270 case 17: /* Root path */
271 if (net_root_path[0] == 0) {
272 size = truncate_sz("Root Path",
273 sizeof(net_root_path), size);
274 memcpy(&net_root_path, ext + 2, size);
275 net_root_path[size] = 0;
276 }
277 break;
278 case 18: /* Extension path - Not yet supported */
279 /*
280 * This can be used to send the information of the
281 * vendor area in another file that the client can
282 * access via TFTP.
283 */
284 break;
285 /* IP host layer fields */
286 case 40: /* NIS Domain name */
287 if (net_nis_domain[0] == 0) {
288 size = truncate_sz("NIS Domain Name",
289 sizeof(net_nis_domain), size);
290 memcpy(&net_nis_domain, ext + 2, size);
291 net_nis_domain[size] = 0;
292 }
293 break;
294 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
295 case 42: /* NTP server IP */
296 net_copy_ip(&net_ntp_server, (struct in_addr *)(ext + 2));
297 break;
298 #endif
299 /* Application layer fields */
300 case 43: /* Vendor specific info - Not yet supported */
301 /*
302 * Binary information to exchange specific
303 * product information.
304 */
305 break;
306 /* Reserved (custom) fields (128..254) */
307 }
308 }
309
310 static void bootp_process_vendor(u8 *ext, int size)
311 {
312 u8 *end = ext + size;
313
314 debug("[BOOTP] Checking extension (%d bytes)...\n", size);
315
316 while ((ext < end) && (*ext != 0xff)) {
317 if (*ext == 0) {
318 ext++;
319 } else {
320 u8 *opt = ext;
321
322 ext += ext[1] + 2;
323 if (ext <= end)
324 bootp_process_vendor_field(opt);
325 }
326 }
327
328 debug("[BOOTP] Received fields:\n");
329 if (net_netmask.s_addr)
330 debug("net_netmask : %pI4\n", &net_netmask);
331
332 if (net_gateway.s_addr)
333 debug("net_gateway : %pI4", &net_gateway);
334
335 if (net_boot_file_expected_size_in_blocks)
336 debug("net_boot_file_expected_size_in_blocks : %d\n",
337 net_boot_file_expected_size_in_blocks);
338
339 if (net_hostname[0])
340 debug("net_hostname : %s\n", net_hostname);
341
342 if (net_root_path[0])
343 debug("net_root_path : %s\n", net_root_path);
344
345 if (net_nis_domain[0])
346 debug("net_nis_domain : %s\n", net_nis_domain);
347
348 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
349 if (net_ntp_server.s_addr)
350 debug("net_ntp_server : %pI4\n", &net_ntp_server);
351 #endif
352 }
353
354 /*
355 * Handle a BOOTP received packet.
356 */
357 static void bootp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
358 unsigned src, unsigned len)
359 {
360 struct bootp_hdr *bp;
361
362 debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
363 src, dest, len, sizeof(struct bootp_hdr));
364
365 bp = (struct bootp_hdr *)pkt;
366
367 /* Filter out pkts we don't want */
368 if (check_reply_packet(pkt, dest, src, len))
369 return;
370
371 /*
372 * Got a good BOOTP reply. Copy the data into our variables.
373 */
374 #if defined(CONFIG_LED_STATUS) && defined(CONFIG_LED_STATUS_BOOT_ENABLE)
375 status_led_set(CONFIG_LED_STATUS_BOOT, CONFIG_LED_STATUS_OFF);
376 #endif
377
378 store_net_params(bp); /* Store net parameters from reply */
379
380 /* Retrieve extended information (we must parse the vendor area) */
381 if (net_read_u32((u32 *)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
382 bootp_process_vendor((uchar *)&bp->bp_vend[4], len);
383
384 net_set_timeout_handler(0, (thand_f *)0);
385 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, "bootp_stop");
386
387 debug("Got good BOOTP\n");
388
389 net_auto_load();
390 }
391 #endif
392
393 /*
394 * Timeout on BOOTP/DHCP request.
395 */
396 static void bootp_timeout_handler(void)
397 {
398 ulong time_taken = get_timer(bootp_start);
399
400 if (time_taken >= time_taken_max) {
401 #ifdef CONFIG_BOOTP_MAY_FAIL
402 char *ethrotate;
403
404 ethrotate = env_get("ethrotate");
405 if ((ethrotate && strcmp(ethrotate, "no") == 0) ||
406 net_restart_wrap) {
407 puts("\nRetry time exceeded\n");
408 net_set_state(NETLOOP_FAIL);
409 } else
410 #endif
411 {
412 puts("\nRetry time exceeded; starting again\n");
413 net_start_again();
414 }
415 } else {
416 bootp_timeout *= 2;
417 if (bootp_timeout > 2000)
418 bootp_timeout = 2000;
419 net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
420 bootp_request();
421 }
422 }
423
424 #define put_vci(e, str) \
425 do { \
426 size_t vci_strlen = strlen(str); \
427 *e++ = 60; /* Vendor Class Identifier */ \
428 *e++ = vci_strlen; \
429 memcpy(e, str, vci_strlen); \
430 e += vci_strlen; \
431 } while (0)
432
433 static u8 *add_vci(u8 *e)
434 {
435 char *vci = NULL;
436 char *env_vci = env_get("bootp_vci");
437
438 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_NET_VCI_STRING)
439 vci = CONFIG_SPL_NET_VCI_STRING;
440 #elif defined(CONFIG_BOOTP_VCI_STRING)
441 vci = CONFIG_BOOTP_VCI_STRING;
442 #endif
443
444 if (env_vci)
445 vci = env_vci;
446
447 if (vci)
448 put_vci(e, vci);
449
450 return e;
451 }
452
453 /*
454 * Initialize BOOTP extension fields in the request.
455 */
456 #if defined(CONFIG_CMD_DHCP)
457 static int dhcp_extended(u8 *e, int message_type, struct in_addr server_ip,
458 struct in_addr requested_ip)
459 {
460 u8 *start = e;
461 u8 *cnt;
462 #ifdef CONFIG_LIB_UUID
463 char *uuid;
464 #endif
465 int clientarch = -1;
466
467 #if defined(CONFIG_BOOTP_VENDOREX)
468 u8 *x;
469 #endif
470 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
471 char *hostname;
472 #endif
473
474 *e++ = 99; /* RFC1048 Magic Cookie */
475 *e++ = 130;
476 *e++ = 83;
477 *e++ = 99;
478
479 *e++ = 53; /* DHCP Message Type */
480 *e++ = 1;
481 *e++ = message_type;
482
483 *e++ = 57; /* Maximum DHCP Message Size */
484 *e++ = 2;
485 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 8;
486 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
487
488 if (server_ip.s_addr) {
489 int tmp = ntohl(server_ip.s_addr);
490
491 *e++ = 54; /* ServerID */
492 *e++ = 4;
493 *e++ = tmp >> 24;
494 *e++ = tmp >> 16;
495 *e++ = tmp >> 8;
496 *e++ = tmp & 0xff;
497 }
498
499 if (requested_ip.s_addr) {
500 int tmp = ntohl(requested_ip.s_addr);
501
502 *e++ = 50; /* Requested IP */
503 *e++ = 4;
504 *e++ = tmp >> 24;
505 *e++ = tmp >> 16;
506 *e++ = tmp >> 8;
507 *e++ = tmp & 0xff;
508 }
509 #if defined(CONFIG_BOOTP_SEND_HOSTNAME)
510 hostname = env_get("hostname");
511 if (hostname) {
512 int hostnamelen = strlen(hostname);
513
514 *e++ = 12; /* Hostname */
515 *e++ = hostnamelen;
516 memcpy(e, hostname, hostnamelen);
517 e += hostnamelen;
518 }
519 #endif
520
521 #ifdef CONFIG_BOOTP_PXE_CLIENTARCH
522 clientarch = CONFIG_BOOTP_PXE_CLIENTARCH;
523 #endif
524
525 if (env_get("bootp_arch"))
526 clientarch = env_get_ulong("bootp_arch", 16, clientarch);
527
528 if (clientarch > 0) {
529 *e++ = 93; /* Client System Architecture */
530 *e++ = 2;
531 *e++ = (clientarch >> 8) & 0xff;
532 *e++ = clientarch & 0xff;
533 }
534
535 *e++ = 94; /* Client Network Interface Identifier */
536 *e++ = 3;
537 *e++ = 1; /* type field for UNDI */
538 *e++ = 0; /* major revision */
539 *e++ = 0; /* minor revision */
540
541 #ifdef CONFIG_LIB_UUID
542 uuid = env_get("pxeuuid");
543
544 if (uuid) {
545 if (uuid_str_valid(uuid)) {
546 *e++ = 97; /* Client Machine Identifier */
547 *e++ = 17;
548 *e++ = 0; /* type 0 - UUID */
549
550 uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD);
551 e += 16;
552 } else {
553 printf("Invalid pxeuuid: %s\n", uuid);
554 }
555 }
556 #endif
557
558 e = add_vci(e);
559
560 #if defined(CONFIG_BOOTP_VENDOREX)
561 x = dhcp_vendorex_prep(e);
562 if (x)
563 return x - start;
564 #endif
565
566 *e++ = 55; /* Parameter Request List */
567 cnt = e++; /* Pointer to count of requested items */
568 *cnt = 0;
569 #if defined(CONFIG_BOOTP_SUBNETMASK)
570 *e++ = 1; /* Subnet Mask */
571 *cnt += 1;
572 #endif
573 #if defined(CONFIG_BOOTP_TIMEOFFSET)
574 *e++ = 2;
575 *cnt += 1;
576 #endif
577 #if defined(CONFIG_BOOTP_GATEWAY)
578 *e++ = 3; /* Router Option */
579 *cnt += 1;
580 #endif
581 #if defined(CONFIG_BOOTP_DNS)
582 *e++ = 6; /* DNS Server(s) */
583 *cnt += 1;
584 #endif
585 #if defined(CONFIG_BOOTP_HOSTNAME)
586 *e++ = 12; /* Hostname */
587 *cnt += 1;
588 #endif
589 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
590 *e++ = 13; /* Boot File Size */
591 *cnt += 1;
592 #endif
593 #if defined(CONFIG_BOOTP_BOOTPATH)
594 *e++ = 17; /* Boot path */
595 *cnt += 1;
596 #endif
597 #if defined(CONFIG_BOOTP_NISDOMAIN)
598 *e++ = 40; /* NIS Domain name request */
599 *cnt += 1;
600 #endif
601 #if defined(CONFIG_BOOTP_NTPSERVER)
602 *e++ = 42;
603 *cnt += 1;
604 #endif
605 if (IS_ENABLED(CONFIG_BOOTP_PXE_DHCP_OPTION)) {
606 *e++ = 209; /* PXELINUX Config File */
607 *cnt += 1;
608 }
609 /* no options, so back up to avoid sending an empty request list */
610 if (*cnt == 0)
611 e -= 2;
612
613 *e++ = 255; /* End of the list */
614
615 /* Pad to minimal length */
616 #ifdef CFG_DHCP_MIN_EXT_LEN
617 while ((e - start) < CFG_DHCP_MIN_EXT_LEN)
618 *e++ = 0;
619 #endif
620
621 return e - start;
622 }
623
624 #else
625 /*
626 * Warning: no field size check - change CONFIG_BOOTP_* at your own risk!
627 */
628 static int bootp_extended(u8 *e)
629 {
630 u8 *start = e;
631
632 *e++ = 99; /* RFC1048 Magic Cookie */
633 *e++ = 130;
634 *e++ = 83;
635 *e++ = 99;
636
637 #if defined(CONFIG_CMD_DHCP)
638 *e++ = 53; /* DHCP Message Type */
639 *e++ = 1;
640 *e++ = DHCP_DISCOVER;
641
642 *e++ = 57; /* Maximum DHCP Message Size */
643 *e++ = 2;
644 *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 16;
645 *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff;
646 #endif
647
648 e = add_vci(e);
649
650 #if defined(CONFIG_BOOTP_SUBNETMASK)
651 *e++ = 1; /* Subnet mask request */
652 *e++ = 4;
653 e += 4;
654 #endif
655
656 #if defined(CONFIG_BOOTP_GATEWAY)
657 *e++ = 3; /* Default gateway request */
658 *e++ = 4;
659 e += 4;
660 #endif
661
662 #if defined(CONFIG_BOOTP_DNS)
663 *e++ = 6; /* Domain Name Server */
664 *e++ = 4;
665 e += 4;
666 #endif
667
668 #if defined(CONFIG_BOOTP_HOSTNAME)
669 *e++ = 12; /* Host name request */
670 *e++ = 32;
671 e += 32;
672 #endif
673
674 #if defined(CONFIG_BOOTP_BOOTFILESIZE)
675 *e++ = 13; /* Boot file size */
676 *e++ = 2;
677 e += 2;
678 #endif
679
680 #if defined(CONFIG_BOOTP_BOOTPATH)
681 *e++ = 17; /* Boot path */
682 *e++ = 32;
683 e += 32;
684 #endif
685
686 #if defined(CONFIG_BOOTP_NISDOMAIN)
687 *e++ = 40; /* NIS Domain name request */
688 *e++ = 32;
689 e += 32;
690 #endif
691 #if defined(CONFIG_BOOTP_NTPSERVER)
692 *e++ = 42;
693 *e++ = 4;
694 e += 4;
695 #endif
696
697 *e++ = 255; /* End of the list */
698
699 /*
700 * If nothing in list, remove it altogether. Some DHCP servers get
701 * upset by this minor faux pas and do not respond at all.
702 */
703 if (e == start + 3) {
704 printf("*** Warning: no DHCP options requested\n");
705 e -= 3;
706 }
707
708 return e - start;
709 }
710 #endif
711
712 void bootp_reset(void)
713 {
714 bootp_num_ids = 0;
715 bootp_try = 0;
716 bootp_start = get_timer(0);
717 bootp_timeout = 250;
718 }
719
720 void bootp_request(void)
721 {
722 uchar *pkt, *iphdr;
723 struct bootp_hdr *bp;
724 int extlen, pktlen, iplen;
725 int eth_hdr_size;
726 #ifdef CONFIG_BOOTP_RANDOM_DELAY
727 ulong rand_ms;
728 #endif
729 u32 bootp_id;
730 struct in_addr zero_ip;
731 struct in_addr bcast_ip;
732 char *ep; /* Environment pointer */
733
734 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start");
735 #if defined(CONFIG_CMD_DHCP)
736 dhcp_state = INIT;
737 #endif
738
739 ep = env_get("bootpretryperiod");
740 if (ep != NULL)
741 time_taken_max = dectoul(ep, NULL);
742 else
743 time_taken_max = TIMEOUT_MS;
744
745 #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */
746 if (bootp_try == 0)
747 srand_mac();
748
749 if (bootp_try <= 2) /* Start with max 1024 * 1ms */
750 rand_ms = rand() >> (22 - bootp_try);
751 else /* After 3rd BOOTP request max 8192 * 1ms */
752 rand_ms = rand() >> 19;
753
754 printf("Random delay: %ld ms...\n", rand_ms);
755 mdelay(rand_ms);
756
757 #endif /* CONFIG_BOOTP_RANDOM_DELAY */
758
759 printf("BOOTP broadcast %d\n", ++bootp_try);
760 pkt = net_tx_packet;
761 memset((void *)pkt, 0, PKTSIZE);
762
763 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
764 pkt += eth_hdr_size;
765
766 /*
767 * Next line results in incorrect packet size being transmitted,
768 * resulting in errors in some DHCP servers, reporting missing bytes.
769 * Size must be set in packet header after extension length has been
770 * determined.
771 * C. Hallinan, DS4.COM, Inc.
772 */
773 /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC,
774 sizeof (struct bootp_hdr)); */
775 iphdr = pkt; /* We need this later for net_set_udp_header() */
776 pkt += IP_UDP_HDR_SIZE;
777
778 bp = (struct bootp_hdr *)pkt;
779 bp->bp_op = OP_BOOTREQUEST;
780 bp->bp_htype = HWT_ETHER;
781 bp->bp_hlen = HWL_ETHER;
782 bp->bp_hops = 0;
783 /*
784 * according to RFC1542, should be 0 on first request, secs since
785 * first request otherwise
786 */
787 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
788 zero_ip.s_addr = 0;
789 net_write_ip(&bp->bp_ciaddr, zero_ip);
790 net_write_ip(&bp->bp_yiaddr, zero_ip);
791 net_write_ip(&bp->bp_siaddr, zero_ip);
792 net_write_ip(&bp->bp_giaddr, zero_ip);
793 memcpy(bp->bp_chaddr, net_ethaddr, 6);
794 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
795
796 /* Request additional information from the BOOTP/DHCP server */
797 #if defined(CONFIG_CMD_DHCP)
798 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_DISCOVER, zero_ip,
799 zero_ip);
800 #else
801 extlen = bootp_extended((u8 *)bp->bp_vend);
802 #endif
803
804 /*
805 * Bootp ID is the lower 4 bytes of our ethernet address
806 * plus the current time in ms.
807 */
808 bootp_id = ((u32)net_ethaddr[2] << 24)
809 | ((u32)net_ethaddr[3] << 16)
810 | ((u32)net_ethaddr[4] << 8)
811 | (u32)net_ethaddr[5];
812 bootp_id += get_timer(0);
813 bootp_id = htonl(bootp_id);
814 bootp_add_id(bootp_id);
815 net_copy_u32(&bp->bp_id, &bootp_id);
816
817 /*
818 * Calculate proper packet lengths taking into account the
819 * variable size of the options field
820 */
821 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
822 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
823 bcast_ip.s_addr = 0xFFFFFFFFL;
824 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
825 net_set_timeout_handler(bootp_timeout, bootp_timeout_handler);
826
827 #if defined(CONFIG_CMD_DHCP)
828 dhcp_state = SELECTING;
829 net_set_udp_handler(dhcp_handler);
830 #else
831 net_set_udp_handler(bootp_handler);
832 #endif
833 net_send_packet(net_tx_packet, pktlen);
834 }
835
836 #if defined(CONFIG_CMD_DHCP)
837 static void dhcp_process_options(uchar *popt, uchar *end)
838 {
839 int oplen, size;
840 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
841 int *to_ptr;
842 #endif
843
844 while (popt < end && *popt != 0xff) {
845 oplen = *(popt + 1);
846 switch (*popt) {
847 case 0:
848 oplen = -1; /* Pad omits len byte */
849 break;
850 case 1:
851 net_copy_ip(&net_netmask, (popt + 2));
852 break;
853 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
854 case 2: /* Time offset */
855 to_ptr = &net_ntp_time_offset;
856 net_copy_u32((u32 *)to_ptr, (u32 *)(popt + 2));
857 net_ntp_time_offset = ntohl(net_ntp_time_offset);
858 break;
859 #endif
860 case 3:
861 net_copy_ip(&net_gateway, (popt + 2));
862 break;
863 case 6:
864 net_copy_ip(&net_dns_server, (popt + 2));
865 #if defined(CONFIG_BOOTP_DNS2)
866 if (*(popt + 1) > 4)
867 net_copy_ip(&net_dns_server2, (popt + 2 + 4));
868 #endif
869 break;
870 case 12:
871 size = truncate_sz("Host Name",
872 sizeof(net_hostname), oplen);
873 memcpy(&net_hostname, popt + 2, size);
874 net_hostname[size] = 0;
875 break;
876 case 15: /* Ignore Domain Name Option */
877 break;
878 case 17:
879 size = truncate_sz("Root Path",
880 sizeof(net_root_path), oplen);
881 memcpy(&net_root_path, popt + 2, size);
882 net_root_path[size] = 0;
883 break;
884 case 28: /* Ignore Broadcast Address Option */
885 break;
886 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
887 case 42: /* NTP server IP */
888 net_copy_ip(&net_ntp_server, (popt + 2));
889 break;
890 #endif
891 case 51:
892 net_copy_u32(&dhcp_leasetime, (u32 *)(popt + 2));
893 break;
894 case 52:
895 dhcp_option_overload = popt[2];
896 break;
897 case 53: /* Ignore Message Type Option */
898 break;
899 case 54:
900 net_copy_ip(&dhcp_server_ip, (popt + 2));
901 break;
902 case 58: /* Ignore Renewal Time Option */
903 break;
904 case 59: /* Ignore Rebinding Time Option */
905 break;
906 case 66: /* Ignore TFTP server name */
907 break;
908 case 67: /* Bootfile option */
909 if (!net_boot_file_name_explicit) {
910 size = truncate_sz("Bootfile",
911 sizeof(net_boot_file_name),
912 oplen);
913 memcpy(&net_boot_file_name, popt + 2, size);
914 net_boot_file_name[size] = 0;
915 }
916 break;
917 case 209: /* PXELINUX Config File */
918 if (IS_ENABLED(CONFIG_BOOTP_PXE_DHCP_OPTION)) {
919 /* In case it has already been allocated when get DHCP Offer packet,
920 * free first to avoid memory leak.
921 */
922 if (pxelinux_configfile)
923 free(pxelinux_configfile);
924
925 pxelinux_configfile = (char *)malloc((oplen + 1) * sizeof(char));
926
927 if (pxelinux_configfile)
928 strlcpy(pxelinux_configfile, popt + 2, oplen + 1);
929 else
930 printf("Error: Failed to allocate pxelinux_configfile\n");
931 }
932 break;
933 default:
934 #if defined(CONFIG_BOOTP_VENDOREX)
935 if (dhcp_vendorex_proc(popt))
936 break;
937 #endif
938 printf("*** Unhandled DHCP Option in OFFER/ACK:"
939 " %d\n", *popt);
940 break;
941 }
942 popt += oplen + 2; /* Process next option */
943 }
944 }
945
946 static void dhcp_packet_process_options(struct bootp_hdr *bp)
947 {
948 uchar *popt = (uchar *)&bp->bp_vend[4];
949 uchar *end = popt + BOOTP_HDR_SIZE;
950
951 if (net_read_u32((u32 *)&bp->bp_vend[0]) != htonl(BOOTP_VENDOR_MAGIC))
952 return;
953
954 dhcp_option_overload = 0;
955
956 /*
957 * The 'options' field MUST be interpreted first, 'file' next,
958 * 'sname' last.
959 */
960 dhcp_process_options(popt, end);
961
962 if (dhcp_option_overload & OVERLOAD_FILE) {
963 popt = (uchar *)bp->bp_file;
964 end = popt + sizeof(bp->bp_file);
965 dhcp_process_options(popt, end);
966 }
967
968 if (dhcp_option_overload & OVERLOAD_SNAME) {
969 popt = (uchar *)bp->bp_sname;
970 end = popt + sizeof(bp->bp_sname);
971 dhcp_process_options(popt, end);
972 }
973 }
974
975 static int dhcp_message_type(unsigned char *popt)
976 {
977 if (net_read_u32((u32 *)popt) != htonl(BOOTP_VENDOR_MAGIC))
978 return -1;
979
980 popt += 4;
981 while (*popt != 0xff) {
982 if (*popt == 53) /* DHCP Message Type */
983 return *(popt + 2);
984 if (*popt == 0) {
985 /* Pad */
986 popt += 1;
987 } else {
988 /* Scan through all options */
989 popt += *(popt + 1) + 2;
990 }
991 }
992 return -1;
993 }
994
995 static void dhcp_send_request_packet(struct bootp_hdr *bp_offer)
996 {
997 uchar *pkt, *iphdr;
998 struct bootp_hdr *bp;
999 int pktlen, iplen, extlen;
1000 int eth_hdr_size;
1001 struct in_addr offered_ip;
1002 struct in_addr zero_ip;
1003 struct in_addr bcast_ip;
1004
1005 debug("dhcp_send_request_packet: Sending DHCPREQUEST\n");
1006 pkt = net_tx_packet;
1007 memset((void *)pkt, 0, PKTSIZE);
1008
1009 eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP);
1010 pkt += eth_hdr_size;
1011
1012 iphdr = pkt; /* We'll need this later to set proper pkt size */
1013 pkt += IP_UDP_HDR_SIZE;
1014
1015 bp = (struct bootp_hdr *)pkt;
1016 bp->bp_op = OP_BOOTREQUEST;
1017 bp->bp_htype = HWT_ETHER;
1018 bp->bp_hlen = HWL_ETHER;
1019 bp->bp_hops = 0;
1020 bp->bp_secs = htons(get_timer(bootp_start) / 1000);
1021 /* Do not set the client IP, your IP, or server IP yet, since it
1022 * hasn't been ACK'ed by the server yet */
1023
1024 /*
1025 * RFC3046 requires Relay Agents to discard packets with
1026 * nonzero and offered giaddr
1027 */
1028 zero_ip.s_addr = 0;
1029 net_write_ip(&bp->bp_giaddr, zero_ip);
1030
1031 memcpy(bp->bp_chaddr, net_ethaddr, 6);
1032 copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file));
1033
1034 /*
1035 * ID is the id of the OFFER packet
1036 */
1037
1038 net_copy_u32(&bp->bp_id, &bp_offer->bp_id);
1039
1040 /*
1041 * Copy options from OFFER packet if present
1042 */
1043
1044 /* Copy offered IP into the parameters request list */
1045 net_copy_ip(&offered_ip, &bp_offer->bp_yiaddr);
1046 extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_REQUEST,
1047 dhcp_server_ip, offered_ip);
1048
1049 iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen;
1050 pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen;
1051 bcast_ip.s_addr = 0xFFFFFFFFL;
1052 net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen);
1053
1054 debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen);
1055 net_send_packet(net_tx_packet, pktlen);
1056 }
1057
1058 /*
1059 * Handle DHCP received packets.
1060 */
1061 static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
1062 unsigned src, unsigned len)
1063 {
1064 struct bootp_hdr *bp = (struct bootp_hdr *)pkt;
1065
1066 debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n",
1067 src, dest, len, dhcp_state);
1068
1069 /* Filter out pkts we don't want */
1070 if (check_reply_packet(pkt, dest, src, len))
1071 return;
1072
1073 debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: "
1074 "%d\n", src, dest, len, dhcp_state);
1075
1076 if (net_read_ip(&bp->bp_yiaddr).s_addr == 0) {
1077 #if defined(CONFIG_SERVERIP_FROM_PROXYDHCP)
1078 store_bootp_params(bp);
1079 #endif
1080 return;
1081 }
1082
1083 switch (dhcp_state) {
1084 case SELECTING:
1085 /*
1086 * Wait an appropriate time for any potential DHCPOFFER packets
1087 * to arrive. Then select one, and generate DHCPREQUEST
1088 * response. If filename is in format we recognize, assume it
1089 * is a valid OFFER from a server we want.
1090 */
1091 debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file);
1092 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1093 if (strncmp(bp->bp_file,
1094 CONFIG_SYS_BOOTFILE_PREFIX,
1095 strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0) {
1096 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1097 if (CONFIG_IS_ENABLED(UNIT_TEST) &&
1098 dhcp_message_type((u8 *)bp->bp_vend) == -1) {
1099 debug("got BOOTP response; transitioning to BOUND\n");
1100 goto dhcp_got_bootp;
1101 }
1102 dhcp_packet_process_options(bp);
1103 if (CONFIG_IS_ENABLED(EFI_LOADER) &&
1104 IS_ENABLED(CONFIG_NETDEVICES))
1105 efi_net_set_dhcp_ack(pkt, len);
1106
1107 #if defined(CONFIG_SERVERIP_FROM_PROXYDHCP)
1108 if (!net_server_ip.s_addr)
1109 udelay(CONFIG_SERVERIP_FROM_PROXYDHCP_DELAY_MS *
1110 1000);
1111 #endif /* CONFIG_SERVERIP_FROM_PROXYDHCP */
1112
1113 debug("TRANSITIONING TO REQUESTING STATE\n");
1114 dhcp_state = REQUESTING;
1115
1116 net_set_timeout_handler(5000, bootp_timeout_handler);
1117 dhcp_send_request_packet(bp);
1118 #ifdef CONFIG_SYS_BOOTFILE_PREFIX
1119 }
1120 #endif /* CONFIG_SYS_BOOTFILE_PREFIX */
1121
1122 return;
1123 break;
1124 case REQUESTING:
1125 debug("DHCP State: REQUESTING\n");
1126
1127 if (dhcp_message_type((u8 *)bp->bp_vend) == DHCP_ACK) {
1128 dhcp_got_bootp:
1129 dhcp_packet_process_options(bp);
1130 /* Store net params from reply */
1131 store_net_params(bp);
1132 dhcp_state = BOUND;
1133 printf("DHCP client bound to address %pI4 (%lu ms)\n",
1134 &net_ip, get_timer(bootp_start));
1135 net_set_timeout_handler(0, (thand_f *)0);
1136 bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP,
1137 "bootp_stop");
1138
1139 net_auto_load();
1140 return;
1141 }
1142 break;
1143 case BOUND:
1144 /* DHCP client bound to address */
1145 break;
1146 default:
1147 puts("DHCP: INVALID STATE\n");
1148 break;
1149 }
1150 }
1151
1152 void dhcp_request(void)
1153 {
1154 bootp_request();
1155 }
1156 #endif /* CONFIG_CMD_DHCP */
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