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