]>
Commit | Line | Data |
---|---|---|
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_LED_STATUS | |
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_LED_STATUS) && defined(CONFIG_LED_STATUS_BOOT_ENABLE) | |
363 | status_led_set(CONFIG_LED_STATUS_BOOT, CONFIG_LED_STATUS_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 | #ifdef CONFIG_LIB_UUID | |
444 | char *uuid; | |
445 | #endif | |
446 | int clientarch = -1; | |
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 | #ifdef CONFIG_BOOTP_PXE_CLIENTARCH | |
503 | clientarch = CONFIG_BOOTP_PXE_CLIENTARCH; | |
504 | #endif | |
505 | ||
506 | if (getenv("bootp_arch")) | |
507 | clientarch = getenv_ulong("bootp_arch", 16, clientarch); | |
508 | ||
509 | if (clientarch > 0) { | |
510 | *e++ = 93; /* Client System Architecture */ | |
511 | *e++ = 2; | |
512 | *e++ = (clientarch >> 8) & 0xff; | |
513 | *e++ = clientarch & 0xff; | |
514 | } | |
515 | ||
516 | *e++ = 94; /* Client Network Interface Identifier */ | |
517 | *e++ = 3; | |
518 | *e++ = 1; /* type field for UNDI */ | |
519 | *e++ = 0; /* major revision */ | |
520 | *e++ = 0; /* minor revision */ | |
521 | ||
522 | #ifdef CONFIG_LIB_UUID | |
523 | uuid = getenv("pxeuuid"); | |
524 | ||
525 | if (uuid) { | |
526 | if (uuid_str_valid(uuid)) { | |
527 | *e++ = 97; /* Client Machine Identifier */ | |
528 | *e++ = 17; | |
529 | *e++ = 0; /* type 0 - UUID */ | |
530 | ||
531 | uuid_str_to_bin(uuid, e, UUID_STR_FORMAT_STD); | |
532 | e += 16; | |
533 | } else { | |
534 | printf("Invalid pxeuuid: %s\n", uuid); | |
535 | } | |
536 | } | |
537 | #endif | |
538 | ||
539 | e = add_vci(e); | |
540 | ||
541 | #if defined(CONFIG_BOOTP_VENDOREX) | |
542 | x = dhcp_vendorex_prep(e); | |
543 | if (x) | |
544 | return x - start; | |
545 | #endif | |
546 | ||
547 | *e++ = 55; /* Parameter Request List */ | |
548 | cnt = e++; /* Pointer to count of requested items */ | |
549 | *cnt = 0; | |
550 | #if defined(CONFIG_BOOTP_SUBNETMASK) | |
551 | *e++ = 1; /* Subnet Mask */ | |
552 | *cnt += 1; | |
553 | #endif | |
554 | #if defined(CONFIG_BOOTP_TIMEOFFSET) | |
555 | *e++ = 2; | |
556 | *cnt += 1; | |
557 | #endif | |
558 | #if defined(CONFIG_BOOTP_GATEWAY) | |
559 | *e++ = 3; /* Router Option */ | |
560 | *cnt += 1; | |
561 | #endif | |
562 | #if defined(CONFIG_BOOTP_DNS) | |
563 | *e++ = 6; /* DNS Server(s) */ | |
564 | *cnt += 1; | |
565 | #endif | |
566 | #if defined(CONFIG_BOOTP_HOSTNAME) | |
567 | *e++ = 12; /* Hostname */ | |
568 | *cnt += 1; | |
569 | #endif | |
570 | #if defined(CONFIG_BOOTP_BOOTFILESIZE) | |
571 | *e++ = 13; /* Boot File Size */ | |
572 | *cnt += 1; | |
573 | #endif | |
574 | #if defined(CONFIG_BOOTP_BOOTPATH) | |
575 | *e++ = 17; /* Boot path */ | |
576 | *cnt += 1; | |
577 | #endif | |
578 | #if defined(CONFIG_BOOTP_NISDOMAIN) | |
579 | *e++ = 40; /* NIS Domain name request */ | |
580 | *cnt += 1; | |
581 | #endif | |
582 | #if defined(CONFIG_BOOTP_NTPSERVER) | |
583 | *e++ = 42; | |
584 | *cnt += 1; | |
585 | #endif | |
586 | /* no options, so back up to avoid sending an empty request list */ | |
587 | if (*cnt == 0) | |
588 | e -= 2; | |
589 | ||
590 | *e++ = 255; /* End of the list */ | |
591 | ||
592 | /* Pad to minimal length */ | |
593 | #ifdef CONFIG_DHCP_MIN_EXT_LEN | |
594 | while ((e - start) < CONFIG_DHCP_MIN_EXT_LEN) | |
595 | *e++ = 0; | |
596 | #endif | |
597 | ||
598 | return e - start; | |
599 | } | |
600 | ||
601 | #else | |
602 | /* | |
603 | * Warning: no field size check - change CONFIG_BOOTP_* at your own risk! | |
604 | */ | |
605 | static int bootp_extended(u8 *e) | |
606 | { | |
607 | u8 *start = e; | |
608 | ||
609 | *e++ = 99; /* RFC1048 Magic Cookie */ | |
610 | *e++ = 130; | |
611 | *e++ = 83; | |
612 | *e++ = 99; | |
613 | ||
614 | #if defined(CONFIG_CMD_DHCP) | |
615 | *e++ = 53; /* DHCP Message Type */ | |
616 | *e++ = 1; | |
617 | *e++ = DHCP_DISCOVER; | |
618 | ||
619 | *e++ = 57; /* Maximum DHCP Message Size */ | |
620 | *e++ = 2; | |
621 | *e++ = (576 - 312 + OPT_FIELD_SIZE) >> 16; | |
622 | *e++ = (576 - 312 + OPT_FIELD_SIZE) & 0xff; | |
623 | #endif | |
624 | ||
625 | add_vci(e); | |
626 | ||
627 | #if defined(CONFIG_BOOTP_SUBNETMASK) | |
628 | *e++ = 1; /* Subnet mask request */ | |
629 | *e++ = 4; | |
630 | e += 4; | |
631 | #endif | |
632 | ||
633 | #if defined(CONFIG_BOOTP_GATEWAY) | |
634 | *e++ = 3; /* Default gateway request */ | |
635 | *e++ = 4; | |
636 | e += 4; | |
637 | #endif | |
638 | ||
639 | #if defined(CONFIG_BOOTP_DNS) | |
640 | *e++ = 6; /* Domain Name Server */ | |
641 | *e++ = 4; | |
642 | e += 4; | |
643 | #endif | |
644 | ||
645 | #if defined(CONFIG_BOOTP_HOSTNAME) | |
646 | *e++ = 12; /* Host name request */ | |
647 | *e++ = 32; | |
648 | e += 32; | |
649 | #endif | |
650 | ||
651 | #if defined(CONFIG_BOOTP_BOOTFILESIZE) | |
652 | *e++ = 13; /* Boot file size */ | |
653 | *e++ = 2; | |
654 | e += 2; | |
655 | #endif | |
656 | ||
657 | #if defined(CONFIG_BOOTP_BOOTPATH) | |
658 | *e++ = 17; /* Boot path */ | |
659 | *e++ = 32; | |
660 | e += 32; | |
661 | #endif | |
662 | ||
663 | #if defined(CONFIG_BOOTP_NISDOMAIN) | |
664 | *e++ = 40; /* NIS Domain name request */ | |
665 | *e++ = 32; | |
666 | e += 32; | |
667 | #endif | |
668 | #if defined(CONFIG_BOOTP_NTPSERVER) | |
669 | *e++ = 42; | |
670 | *e++ = 4; | |
671 | e += 4; | |
672 | #endif | |
673 | ||
674 | *e++ = 255; /* End of the list */ | |
675 | ||
676 | /* | |
677 | * If nothing in list, remove it altogether. Some DHCP servers get | |
678 | * upset by this minor faux pas and do not respond at all. | |
679 | */ | |
680 | if (e == start + 3) { | |
681 | printf("*** Warning: no DHCP options requested\n"); | |
682 | e -= 3; | |
683 | } | |
684 | ||
685 | return e - start; | |
686 | } | |
687 | #endif | |
688 | ||
689 | void bootp_reset(void) | |
690 | { | |
691 | bootp_num_ids = 0; | |
692 | bootp_try = 0; | |
693 | bootp_start = get_timer(0); | |
694 | bootp_timeout = 250; | |
695 | } | |
696 | ||
697 | void bootp_request(void) | |
698 | { | |
699 | uchar *pkt, *iphdr; | |
700 | struct bootp_hdr *bp; | |
701 | int extlen, pktlen, iplen; | |
702 | int eth_hdr_size; | |
703 | #ifdef CONFIG_BOOTP_RANDOM_DELAY | |
704 | ulong rand_ms; | |
705 | #endif | |
706 | u32 bootp_id; | |
707 | struct in_addr zero_ip; | |
708 | struct in_addr bcast_ip; | |
709 | char *ep; /* Environment pointer */ | |
710 | ||
711 | bootstage_mark_name(BOOTSTAGE_ID_BOOTP_START, "bootp_start"); | |
712 | #if defined(CONFIG_CMD_DHCP) | |
713 | dhcp_state = INIT; | |
714 | #endif | |
715 | ||
716 | ep = getenv("bootpretryperiod"); | |
717 | if (ep != NULL) | |
718 | time_taken_max = simple_strtoul(ep, NULL, 10); | |
719 | else | |
720 | time_taken_max = TIMEOUT_MS; | |
721 | ||
722 | #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ | |
723 | if (bootp_try == 0) | |
724 | srand_mac(); | |
725 | ||
726 | if (bootp_try <= 2) /* Start with max 1024 * 1ms */ | |
727 | rand_ms = rand() >> (22 - bootp_try); | |
728 | else /* After 3rd BOOTP request max 8192 * 1ms */ | |
729 | rand_ms = rand() >> 19; | |
730 | ||
731 | printf("Random delay: %ld ms...\n", rand_ms); | |
732 | mdelay(rand_ms); | |
733 | ||
734 | #endif /* CONFIG_BOOTP_RANDOM_DELAY */ | |
735 | ||
736 | printf("BOOTP broadcast %d\n", ++bootp_try); | |
737 | pkt = net_tx_packet; | |
738 | memset((void *)pkt, 0, PKTSIZE); | |
739 | ||
740 | eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP); | |
741 | pkt += eth_hdr_size; | |
742 | ||
743 | /* | |
744 | * Next line results in incorrect packet size being transmitted, | |
745 | * resulting in errors in some DHCP servers, reporting missing bytes. | |
746 | * Size must be set in packet header after extension length has been | |
747 | * determined. | |
748 | * C. Hallinan, DS4.COM, Inc. | |
749 | */ | |
750 | /* net_set_udp_header(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, | |
751 | sizeof (struct bootp_hdr)); */ | |
752 | iphdr = pkt; /* We need this later for net_set_udp_header() */ | |
753 | pkt += IP_UDP_HDR_SIZE; | |
754 | ||
755 | bp = (struct bootp_hdr *)pkt; | |
756 | bp->bp_op = OP_BOOTREQUEST; | |
757 | bp->bp_htype = HWT_ETHER; | |
758 | bp->bp_hlen = HWL_ETHER; | |
759 | bp->bp_hops = 0; | |
760 | /* | |
761 | * according to RFC1542, should be 0 on first request, secs since | |
762 | * first request otherwise | |
763 | */ | |
764 | bp->bp_secs = htons(get_timer(bootp_start) / 1000); | |
765 | zero_ip.s_addr = 0; | |
766 | net_write_ip(&bp->bp_ciaddr, zero_ip); | |
767 | net_write_ip(&bp->bp_yiaddr, zero_ip); | |
768 | net_write_ip(&bp->bp_siaddr, zero_ip); | |
769 | net_write_ip(&bp->bp_giaddr, zero_ip); | |
770 | memcpy(bp->bp_chaddr, net_ethaddr, 6); | |
771 | copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file)); | |
772 | ||
773 | /* Request additional information from the BOOTP/DHCP server */ | |
774 | #if defined(CONFIG_CMD_DHCP) | |
775 | extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_DISCOVER, zero_ip, | |
776 | zero_ip); | |
777 | #else | |
778 | extlen = bootp_extended((u8 *)bp->bp_vend); | |
779 | #endif | |
780 | ||
781 | /* | |
782 | * Bootp ID is the lower 4 bytes of our ethernet address | |
783 | * plus the current time in ms. | |
784 | */ | |
785 | bootp_id = ((u32)net_ethaddr[2] << 24) | |
786 | | ((u32)net_ethaddr[3] << 16) | |
787 | | ((u32)net_ethaddr[4] << 8) | |
788 | | (u32)net_ethaddr[5]; | |
789 | bootp_id += get_timer(0); | |
790 | bootp_id = htonl(bootp_id); | |
791 | bootp_add_id(bootp_id); | |
792 | net_copy_u32(&bp->bp_id, &bootp_id); | |
793 | ||
794 | /* | |
795 | * Calculate proper packet lengths taking into account the | |
796 | * variable size of the options field | |
797 | */ | |
798 | iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen; | |
799 | pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen; | |
800 | bcast_ip.s_addr = 0xFFFFFFFFL; | |
801 | net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
802 | net_set_timeout_handler(bootp_timeout, bootp_timeout_handler); | |
803 | ||
804 | #if defined(CONFIG_CMD_DHCP) | |
805 | dhcp_state = SELECTING; | |
806 | net_set_udp_handler(dhcp_handler); | |
807 | #else | |
808 | net_set_udp_handler(bootp_handler); | |
809 | #endif | |
810 | net_send_packet(net_tx_packet, pktlen); | |
811 | } | |
812 | ||
813 | #if defined(CONFIG_CMD_DHCP) | |
814 | static void dhcp_process_options(uchar *popt, uchar *end) | |
815 | { | |
816 | int oplen, size; | |
817 | #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) | |
818 | int *to_ptr; | |
819 | #endif | |
820 | ||
821 | while (popt < end && *popt != 0xff) { | |
822 | oplen = *(popt + 1); | |
823 | switch (*popt) { | |
824 | case 0: | |
825 | oplen = -1; /* Pad omits len byte */ | |
826 | break; | |
827 | case 1: | |
828 | net_copy_ip(&net_netmask, (popt + 2)); | |
829 | break; | |
830 | #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) | |
831 | case 2: /* Time offset */ | |
832 | to_ptr = &net_ntp_time_offset; | |
833 | net_copy_u32((u32 *)to_ptr, (u32 *)(popt + 2)); | |
834 | net_ntp_time_offset = ntohl(net_ntp_time_offset); | |
835 | break; | |
836 | #endif | |
837 | case 3: | |
838 | net_copy_ip(&net_gateway, (popt + 2)); | |
839 | break; | |
840 | case 6: | |
841 | net_copy_ip(&net_dns_server, (popt + 2)); | |
842 | #if defined(CONFIG_BOOTP_DNS2) | |
843 | if (*(popt + 1) > 4) | |
844 | net_copy_ip(&net_dns_server2, (popt + 2 + 4)); | |
845 | #endif | |
846 | break; | |
847 | case 12: | |
848 | size = truncate_sz("Host Name", | |
849 | sizeof(net_hostname), oplen); | |
850 | memcpy(&net_hostname, popt + 2, size); | |
851 | net_hostname[size] = 0; | |
852 | break; | |
853 | case 15: /* Ignore Domain Name Option */ | |
854 | break; | |
855 | case 17: | |
856 | size = truncate_sz("Root Path", | |
857 | sizeof(net_root_path), oplen); | |
858 | memcpy(&net_root_path, popt + 2, size); | |
859 | net_root_path[size] = 0; | |
860 | break; | |
861 | case 28: /* Ignore Broadcast Address Option */ | |
862 | break; | |
863 | #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) | |
864 | case 42: /* NTP server IP */ | |
865 | net_copy_ip(&net_ntp_server, (popt + 2)); | |
866 | break; | |
867 | #endif | |
868 | case 51: | |
869 | net_copy_u32(&dhcp_leasetime, (u32 *)(popt + 2)); | |
870 | break; | |
871 | case 52: | |
872 | dhcp_option_overload = popt[2]; | |
873 | break; | |
874 | case 53: /* Ignore Message Type Option */ | |
875 | break; | |
876 | case 54: | |
877 | net_copy_ip(&dhcp_server_ip, (popt + 2)); | |
878 | break; | |
879 | case 58: /* Ignore Renewal Time Option */ | |
880 | break; | |
881 | case 59: /* Ignore Rebinding Time Option */ | |
882 | break; | |
883 | case 66: /* Ignore TFTP server name */ | |
884 | break; | |
885 | case 67: /* Bootfile option */ | |
886 | size = truncate_sz("Bootfile", | |
887 | sizeof(net_boot_file_name), oplen); | |
888 | memcpy(&net_boot_file_name, popt + 2, size); | |
889 | net_boot_file_name[size] = 0; | |
890 | break; | |
891 | default: | |
892 | #if defined(CONFIG_BOOTP_VENDOREX) | |
893 | if (dhcp_vendorex_proc(popt)) | |
894 | break; | |
895 | #endif | |
896 | printf("*** Unhandled DHCP Option in OFFER/ACK:" | |
897 | " %d\n", *popt); | |
898 | break; | |
899 | } | |
900 | popt += oplen + 2; /* Process next option */ | |
901 | } | |
902 | } | |
903 | ||
904 | static void dhcp_packet_process_options(struct bootp_hdr *bp) | |
905 | { | |
906 | uchar *popt = (uchar *)&bp->bp_vend[4]; | |
907 | uchar *end = popt + BOOTP_HDR_SIZE; | |
908 | ||
909 | if (net_read_u32((u32 *)&bp->bp_vend[0]) != htonl(BOOTP_VENDOR_MAGIC)) | |
910 | return; | |
911 | ||
912 | dhcp_option_overload = 0; | |
913 | ||
914 | /* | |
915 | * The 'options' field MUST be interpreted first, 'file' next, | |
916 | * 'sname' last. | |
917 | */ | |
918 | dhcp_process_options(popt, end); | |
919 | ||
920 | if (dhcp_option_overload & OVERLOAD_FILE) { | |
921 | popt = (uchar *)bp->bp_file; | |
922 | end = popt + sizeof(bp->bp_file); | |
923 | dhcp_process_options(popt, end); | |
924 | } | |
925 | ||
926 | if (dhcp_option_overload & OVERLOAD_SNAME) { | |
927 | popt = (uchar *)bp->bp_sname; | |
928 | end = popt + sizeof(bp->bp_sname); | |
929 | dhcp_process_options(popt, end); | |
930 | } | |
931 | } | |
932 | ||
933 | static int dhcp_message_type(unsigned char *popt) | |
934 | { | |
935 | if (net_read_u32((u32 *)popt) != htonl(BOOTP_VENDOR_MAGIC)) | |
936 | return -1; | |
937 | ||
938 | popt += 4; | |
939 | while (*popt != 0xff) { | |
940 | if (*popt == 53) /* DHCP Message Type */ | |
941 | return *(popt + 2); | |
942 | if (*popt == 0) { | |
943 | /* Pad */ | |
944 | popt += 1; | |
945 | } else { | |
946 | /* Scan through all options */ | |
947 | popt += *(popt + 1) + 2; | |
948 | } | |
949 | } | |
950 | return -1; | |
951 | } | |
952 | ||
953 | static void dhcp_send_request_packet(struct bootp_hdr *bp_offer) | |
954 | { | |
955 | uchar *pkt, *iphdr; | |
956 | struct bootp_hdr *bp; | |
957 | int pktlen, iplen, extlen; | |
958 | int eth_hdr_size; | |
959 | struct in_addr offered_ip; | |
960 | struct in_addr zero_ip; | |
961 | struct in_addr bcast_ip; | |
962 | ||
963 | debug("dhcp_send_request_packet: Sending DHCPREQUEST\n"); | |
964 | pkt = net_tx_packet; | |
965 | memset((void *)pkt, 0, PKTSIZE); | |
966 | ||
967 | eth_hdr_size = net_set_ether(pkt, net_bcast_ethaddr, PROT_IP); | |
968 | pkt += eth_hdr_size; | |
969 | ||
970 | iphdr = pkt; /* We'll need this later to set proper pkt size */ | |
971 | pkt += IP_UDP_HDR_SIZE; | |
972 | ||
973 | bp = (struct bootp_hdr *)pkt; | |
974 | bp->bp_op = OP_BOOTREQUEST; | |
975 | bp->bp_htype = HWT_ETHER; | |
976 | bp->bp_hlen = HWL_ETHER; | |
977 | bp->bp_hops = 0; | |
978 | bp->bp_secs = htons(get_timer(bootp_start) / 1000); | |
979 | /* Do not set the client IP, your IP, or server IP yet, since it | |
980 | * hasn't been ACK'ed by the server yet */ | |
981 | ||
982 | /* | |
983 | * RFC3046 requires Relay Agents to discard packets with | |
984 | * nonzero and offered giaddr | |
985 | */ | |
986 | zero_ip.s_addr = 0; | |
987 | net_write_ip(&bp->bp_giaddr, zero_ip); | |
988 | ||
989 | memcpy(bp->bp_chaddr, net_ethaddr, 6); | |
990 | copy_filename(bp->bp_file, net_boot_file_name, sizeof(bp->bp_file)); | |
991 | ||
992 | /* | |
993 | * ID is the id of the OFFER packet | |
994 | */ | |
995 | ||
996 | net_copy_u32(&bp->bp_id, &bp_offer->bp_id); | |
997 | ||
998 | /* | |
999 | * Copy options from OFFER packet if present | |
1000 | */ | |
1001 | ||
1002 | /* Copy offered IP into the parameters request list */ | |
1003 | net_copy_ip(&offered_ip, &bp_offer->bp_yiaddr); | |
1004 | extlen = dhcp_extended((u8 *)bp->bp_vend, DHCP_REQUEST, | |
1005 | dhcp_server_ip, offered_ip); | |
1006 | ||
1007 | iplen = BOOTP_HDR_SIZE - OPT_FIELD_SIZE + extlen; | |
1008 | pktlen = eth_hdr_size + IP_UDP_HDR_SIZE + iplen; | |
1009 | bcast_ip.s_addr = 0xFFFFFFFFL; | |
1010 | net_set_udp_header(iphdr, bcast_ip, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
1011 | ||
1012 | #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY | |
1013 | udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); | |
1014 | #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ | |
1015 | debug("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); | |
1016 | net_send_packet(net_tx_packet, pktlen); | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * Handle DHCP received packets. | |
1021 | */ | |
1022 | static void dhcp_handler(uchar *pkt, unsigned dest, struct in_addr sip, | |
1023 | unsigned src, unsigned len) | |
1024 | { | |
1025 | struct bootp_hdr *bp = (struct bootp_hdr *)pkt; | |
1026 | ||
1027 | debug("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", | |
1028 | src, dest, len, dhcp_state); | |
1029 | ||
1030 | /* Filter out pkts we don't want */ | |
1031 | if (check_reply_packet(pkt, dest, src, len)) | |
1032 | return; | |
1033 | ||
1034 | debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: " | |
1035 | "%d\n", src, dest, len, dhcp_state); | |
1036 | ||
1037 | if (net_read_ip(&bp->bp_yiaddr).s_addr == 0) | |
1038 | return; | |
1039 | ||
1040 | switch (dhcp_state) { | |
1041 | case SELECTING: | |
1042 | /* | |
1043 | * Wait an appropriate time for any potential DHCPOFFER packets | |
1044 | * to arrive. Then select one, and generate DHCPREQUEST | |
1045 | * response. If filename is in format we recognize, assume it | |
1046 | * is a valid OFFER from a server we want. | |
1047 | */ | |
1048 | debug("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); | |
1049 | #ifdef CONFIG_SYS_BOOTFILE_PREFIX | |
1050 | if (strncmp(bp->bp_file, | |
1051 | CONFIG_SYS_BOOTFILE_PREFIX, | |
1052 | strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0) { | |
1053 | #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ | |
1054 | dhcp_packet_process_options(bp); | |
1055 | efi_net_set_dhcp_ack(pkt, len); | |
1056 | ||
1057 | debug("TRANSITIONING TO REQUESTING STATE\n"); | |
1058 | dhcp_state = REQUESTING; | |
1059 | ||
1060 | net_set_timeout_handler(5000, bootp_timeout_handler); | |
1061 | dhcp_send_request_packet(bp); | |
1062 | #ifdef CONFIG_SYS_BOOTFILE_PREFIX | |
1063 | } | |
1064 | #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ | |
1065 | ||
1066 | return; | |
1067 | break; | |
1068 | case REQUESTING: | |
1069 | debug("DHCP State: REQUESTING\n"); | |
1070 | ||
1071 | if (dhcp_message_type((u8 *)bp->bp_vend) == DHCP_ACK) { | |
1072 | dhcp_packet_process_options(bp); | |
1073 | /* Store net params from reply */ | |
1074 | store_net_params(bp); | |
1075 | dhcp_state = BOUND; | |
1076 | printf("DHCP client bound to address %pI4 (%lu ms)\n", | |
1077 | &net_ip, get_timer(bootp_start)); | |
1078 | net_set_timeout_handler(0, (thand_f *)0); | |
1079 | bootstage_mark_name(BOOTSTAGE_ID_BOOTP_STOP, | |
1080 | "bootp_stop"); | |
1081 | ||
1082 | net_auto_load(); | |
1083 | return; | |
1084 | } | |
1085 | break; | |
1086 | case BOUND: | |
1087 | /* DHCP client bound to address */ | |
1088 | break; | |
1089 | default: | |
1090 | puts("DHCP: INVALID STATE\n"); | |
1091 | break; | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | void dhcp_request(void) | |
1096 | { | |
1097 | bootp_request(); | |
1098 | } | |
1099 | #endif /* CONFIG_CMD_DHCP */ |