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Commit | Line | Data |
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1 | /* | |
2 | * Based on LiMon - BOOTP. | |
3 | * | |
4 | * Copyright 1994, 1995, 2000 Neil Russell. | |
5 | * (See License) | |
6 | * Copyright 2000 Roland Borde | |
7 | * Copyright 2000 Paolo Scaffardi | |
8 | * Copyright 2000-2004 Wolfgang Denk, wd@denx.de | |
9 | */ | |
10 | ||
11 | #if 0 | |
12 | #define DEBUG 1 /* general debug */ | |
13 | #define DEBUG_BOOTP_EXT 1 /* Debug received vendor fields */ | |
14 | #endif | |
15 | ||
16 | #ifdef DEBUG_BOOTP_EXT | |
17 | #define debug_ext(fmt,args...) printf (fmt ,##args) | |
18 | #else | |
19 | #define debug_ext(fmt,args...) | |
20 | #endif | |
21 | ||
22 | #include <common.h> | |
23 | #include <command.h> | |
24 | #include <net.h> | |
25 | #include "bootp.h" | |
26 | #include "tftp.h" | |
27 | #include "nfs.h" | |
28 | #ifdef CONFIG_STATUS_LED | |
29 | #include <status_led.h> | |
30 | #endif | |
31 | ||
32 | #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ | |
33 | ||
34 | #if defined(CONFIG_CMD_NET) | |
35 | ||
36 | #define TIMEOUT 5000UL /* Milliseconds before trying BOOTP again */ | |
37 | #ifndef CONFIG_NET_RETRY_COUNT | |
38 | # define TIMEOUT_COUNT 5 /* # of timeouts before giving up */ | |
39 | #else | |
40 | # define TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) | |
41 | #endif | |
42 | ||
43 | #define PORT_BOOTPS 67 /* BOOTP server UDP port */ | |
44 | #define PORT_BOOTPC 68 /* BOOTP client UDP port */ | |
45 | ||
46 | #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ | |
47 | #define CONFIG_DHCP_MIN_EXT_LEN 64 | |
48 | #endif | |
49 | ||
50 | ulong BootpID; | |
51 | int BootpTry; | |
52 | #ifdef CONFIG_BOOTP_RANDOM_DELAY | |
53 | ulong seed1, seed2; | |
54 | #endif | |
55 | ||
56 | #if defined(CONFIG_CMD_DHCP) | |
57 | dhcp_state_t dhcp_state = INIT; | |
58 | unsigned long dhcp_leasetime = 0; | |
59 | IPaddr_t NetDHCPServerIP = 0; | |
60 | static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len); | |
61 | ||
62 | /* For Debug */ | |
63 | #if 0 | |
64 | static char *dhcpmsg2str(int type) | |
65 | { | |
66 | switch (type) { | |
67 | case 1: return "DHCPDISCOVER"; break; | |
68 | case 2: return "DHCPOFFER"; break; | |
69 | case 3: return "DHCPREQUEST"; break; | |
70 | case 4: return "DHCPDECLINE"; break; | |
71 | case 5: return "DHCPACK"; break; | |
72 | case 6: return "DHCPNACK"; break; | |
73 | case 7: return "DHCPRELEASE"; break; | |
74 | default: return "UNKNOWN/INVALID MSG TYPE"; break; | |
75 | } | |
76 | } | |
77 | #endif | |
78 | ||
79 | #if defined(CONFIG_BOOTP_VENDOREX) | |
80 | extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */ | |
81 | extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */ | |
82 | #endif | |
83 | ||
84 | #endif | |
85 | ||
86 | static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) | |
87 | { | |
88 | Bootp_t *bp = (Bootp_t *) pkt; | |
89 | int retval = 0; | |
90 | ||
91 | if (dest != PORT_BOOTPC || src != PORT_BOOTPS) | |
92 | retval = -1; | |
93 | else if (len < sizeof (Bootp_t) - OPT_SIZE) | |
94 | retval = -2; | |
95 | else if (bp->bp_op != OP_BOOTREQUEST && | |
96 | bp->bp_op != OP_BOOTREPLY && | |
97 | bp->bp_op != DHCP_OFFER && | |
98 | bp->bp_op != DHCP_ACK && | |
99 | bp->bp_op != DHCP_NAK ) { | |
100 | retval = -3; | |
101 | } | |
102 | else if (bp->bp_htype != HWT_ETHER) | |
103 | retval = -4; | |
104 | else if (bp->bp_hlen != HWL_ETHER) | |
105 | retval = -5; | |
106 | else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) { | |
107 | retval = -6; | |
108 | } | |
109 | ||
110 | debug ("Filtering pkt = %d\n", retval); | |
111 | ||
112 | return retval; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet | |
117 | */ | |
118 | static void BootpCopyNetParams(Bootp_t *bp) | |
119 | { | |
120 | IPaddr_t tmp_ip; | |
121 | ||
122 | NetCopyIP(&NetOurIP, &bp->bp_yiaddr); | |
123 | #if !defined(CONFIG_BOOTP_SERVERIP) | |
124 | NetCopyIP(&tmp_ip, &bp->bp_siaddr); | |
125 | if (tmp_ip != 0) | |
126 | NetCopyIP(&NetServerIP, &bp->bp_siaddr); | |
127 | memcpy (NetServerEther, ((Ethernet_t *)NetRxPacket)->et_src, 6); | |
128 | #endif | |
129 | if (strlen(bp->bp_file) > 0) | |
130 | copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); | |
131 | ||
132 | debug ("Bootfile: %s\n", BootFile); | |
133 | ||
134 | /* Propagate to environment: | |
135 | * don't delete exising entry when BOOTP / DHCP reply does | |
136 | * not contain a new value | |
137 | */ | |
138 | if (*BootFile) { | |
139 | setenv ("bootfile", BootFile); | |
140 | } | |
141 | } | |
142 | ||
143 | static int truncate_sz (const char *name, int maxlen, int curlen) | |
144 | { | |
145 | if (curlen >= maxlen) { | |
146 | printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n", | |
147 | name, curlen, maxlen); | |
148 | curlen = maxlen - 1; | |
149 | } | |
150 | return (curlen); | |
151 | } | |
152 | ||
153 | #if !defined(CONFIG_CMD_DHCP) | |
154 | ||
155 | static void BootpVendorFieldProcess (u8 * ext) | |
156 | { | |
157 | int size = *(ext + 1); | |
158 | ||
159 | debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, | |
160 | *(ext + 1)); | |
161 | ||
162 | NetBootFileSize = 0; | |
163 | ||
164 | switch (*ext) { | |
165 | /* Fixed length fields */ | |
166 | case 1: /* Subnet mask */ | |
167 | if (NetOurSubnetMask == 0) | |
168 | NetCopyIP (&NetOurSubnetMask, (IPaddr_t *) (ext + 2)); | |
169 | break; | |
170 | case 2: /* Time offset - Not yet supported */ | |
171 | break; | |
172 | /* Variable length fields */ | |
173 | case 3: /* Gateways list */ | |
174 | if (NetOurGatewayIP == 0) { | |
175 | NetCopyIP (&NetOurGatewayIP, (IPaddr_t *) (ext + 2)); | |
176 | } | |
177 | break; | |
178 | case 4: /* Time server - Not yet supported */ | |
179 | break; | |
180 | case 5: /* IEN-116 name server - Not yet supported */ | |
181 | break; | |
182 | case 6: | |
183 | if (NetOurDNSIP == 0) { | |
184 | NetCopyIP (&NetOurDNSIP, (IPaddr_t *) (ext + 2)); | |
185 | } | |
186 | #if defined(CONFIG_BOOTP_DNS2) | |
187 | if ((NetOurDNS2IP == 0) && (size > 4)) { | |
188 | NetCopyIP (&NetOurDNS2IP, (IPaddr_t *) (ext + 2 + 4)); | |
189 | } | |
190 | #endif | |
191 | break; | |
192 | case 7: /* Log server - Not yet supported */ | |
193 | break; | |
194 | case 8: /* Cookie/Quote server - Not yet supported */ | |
195 | break; | |
196 | case 9: /* LPR server - Not yet supported */ | |
197 | break; | |
198 | case 10: /* Impress server - Not yet supported */ | |
199 | break; | |
200 | case 11: /* RPL server - Not yet supported */ | |
201 | break; | |
202 | case 12: /* Host name */ | |
203 | if (NetOurHostName[0] == 0) { | |
204 | size = truncate_sz ("Host Name", sizeof (NetOurHostName), size); | |
205 | memcpy (&NetOurHostName, ext + 2, size); | |
206 | NetOurHostName[size] = 0; | |
207 | } | |
208 | break; | |
209 | case 13: /* Boot file size */ | |
210 | if (size == 2) | |
211 | NetBootFileSize = ntohs (*(ushort *) (ext + 2)); | |
212 | else if (size == 4) | |
213 | NetBootFileSize = ntohl (*(ulong *) (ext + 2)); | |
214 | break; | |
215 | case 14: /* Merit dump file - Not yet supported */ | |
216 | break; | |
217 | case 15: /* Domain name - Not yet supported */ | |
218 | break; | |
219 | case 16: /* Swap server - Not yet supported */ | |
220 | break; | |
221 | case 17: /* Root path */ | |
222 | if (NetOurRootPath[0] == 0) { | |
223 | size = truncate_sz ("Root Path", sizeof (NetOurRootPath), size); | |
224 | memcpy (&NetOurRootPath, ext + 2, size); | |
225 | NetOurRootPath[size] = 0; | |
226 | } | |
227 | break; | |
228 | case 18: /* Extension path - Not yet supported */ | |
229 | /* | |
230 | * This can be used to send the information of the | |
231 | * vendor area in another file that the client can | |
232 | * access via TFTP. | |
233 | */ | |
234 | break; | |
235 | /* IP host layer fields */ | |
236 | case 40: /* NIS Domain name */ | |
237 | if (NetOurNISDomain[0] == 0) { | |
238 | size = truncate_sz ("NIS Domain Name", sizeof (NetOurNISDomain), size); | |
239 | memcpy (&NetOurNISDomain, ext + 2, size); | |
240 | NetOurNISDomain[size] = 0; | |
241 | } | |
242 | break; | |
243 | /* Application layer fields */ | |
244 | case 43: /* Vendor specific info - Not yet supported */ | |
245 | /* | |
246 | * Binary information to exchange specific | |
247 | * product information. | |
248 | */ | |
249 | break; | |
250 | /* Reserved (custom) fields (128..254) */ | |
251 | } | |
252 | } | |
253 | ||
254 | static void BootpVendorProcess (u8 * ext, int size) | |
255 | { | |
256 | u8 *end = ext + size; | |
257 | ||
258 | debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size); | |
259 | ||
260 | while ((ext < end) && (*ext != 0xff)) { | |
261 | if (*ext == 0) { | |
262 | ext++; | |
263 | } else { | |
264 | u8 *opt = ext; | |
265 | ||
266 | ext += ext[1] + 2; | |
267 | if (ext <= end) | |
268 | BootpVendorFieldProcess (opt); | |
269 | } | |
270 | } | |
271 | ||
272 | #ifdef DEBUG_BOOTP_EXT | |
273 | puts ("[BOOTP] Received fields: \n"); | |
274 | if (NetOurSubnetMask) | |
275 | printf ("NetOurSubnetMask : %pI4\n", &NetOurSubnetMask); | |
276 | ||
277 | if (NetOurGatewayIP) | |
278 | printf ("NetOurGatewayIP : %pI4", &NetOurGatewayIP); | |
279 | ||
280 | if (NetBootFileSize) { | |
281 | printf ("NetBootFileSize : %d\n", NetBootFileSize); | |
282 | } | |
283 | ||
284 | if (NetOurHostName[0]) { | |
285 | printf ("NetOurHostName : %s\n", NetOurHostName); | |
286 | } | |
287 | ||
288 | if (NetOurRootPath[0]) { | |
289 | printf ("NetOurRootPath : %s\n", NetOurRootPath); | |
290 | } | |
291 | ||
292 | if (NetOurNISDomain[0]) { | |
293 | printf ("NetOurNISDomain : %s\n", NetOurNISDomain); | |
294 | } | |
295 | ||
296 | if (NetBootFileSize) { | |
297 | printf ("NetBootFileSize: %d\n", NetBootFileSize); | |
298 | } | |
299 | #endif /* DEBUG_BOOTP_EXT */ | |
300 | } | |
301 | /* | |
302 | * Handle a BOOTP received packet. | |
303 | */ | |
304 | static void | |
305 | BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
306 | { | |
307 | Bootp_t *bp; | |
308 | char *s; | |
309 | ||
310 | debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n", | |
311 | src, dest, len, sizeof (Bootp_t)); | |
312 | ||
313 | bp = (Bootp_t *)pkt; | |
314 | ||
315 | if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ | |
316 | return; | |
317 | ||
318 | /* | |
319 | * Got a good BOOTP reply. Copy the data into our variables. | |
320 | */ | |
321 | #ifdef CONFIG_STATUS_LED | |
322 | status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); | |
323 | #endif | |
324 | ||
325 | BootpCopyNetParams(bp); /* Store net parameters from reply */ | |
326 | ||
327 | /* Retrieve extended information (we must parse the vendor area) */ | |
328 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
329 | BootpVendorProcess((uchar *)&bp->bp_vend[4], len); | |
330 | ||
331 | NetSetTimeout(0, (thand_f *)0); | |
332 | ||
333 | debug ("Got good BOOTP\n"); | |
334 | ||
335 | if ((s = getenv("autoload")) != NULL) { | |
336 | if (*s == 'n') { | |
337 | /* | |
338 | * Just use BOOTP to configure system; | |
339 | * Do not use TFTP to load the bootfile. | |
340 | */ | |
341 | NetState = NETLOOP_SUCCESS; | |
342 | return; | |
343 | #if defined(CONFIG_CMD_NFS) | |
344 | } else if (strcmp(s, "NFS") == 0) { | |
345 | /* | |
346 | * Use NFS to load the bootfile. | |
347 | */ | |
348 | NfsStart(); | |
349 | return; | |
350 | #endif | |
351 | } | |
352 | } | |
353 | ||
354 | TftpStart(); | |
355 | } | |
356 | #endif | |
357 | ||
358 | /* | |
359 | * Timeout on BOOTP/DHCP request. | |
360 | */ | |
361 | static void | |
362 | BootpTimeout(void) | |
363 | { | |
364 | if (BootpTry >= TIMEOUT_COUNT) { | |
365 | puts ("\nRetry count exceeded; starting again\n"); | |
366 | NetStartAgain (); | |
367 | } else { | |
368 | NetSetTimeout (TIMEOUT, BootpTimeout); | |
369 | BootpRequest (); | |
370 | } | |
371 | } | |
372 | ||
373 | /* | |
374 | * Initialize BOOTP extension fields in the request. | |
375 | */ | |
376 | #if defined(CONFIG_CMD_DHCP) | |
377 | static int DhcpExtended (u8 * e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) | |
378 | { | |
379 | u8 *start = e; | |
380 | u8 *cnt; | |
381 | ||
382 | #if defined(CONFIG_BOOTP_VENDOREX) | |
383 | u8 *x; | |
384 | #endif | |
385 | #if defined(CONFIG_BOOTP_SEND_HOSTNAME) | |
386 | char *hostname; | |
387 | #endif | |
388 | ||
389 | *e++ = 99; /* RFC1048 Magic Cookie */ | |
390 | *e++ = 130; | |
391 | *e++ = 83; | |
392 | *e++ = 99; | |
393 | ||
394 | *e++ = 53; /* DHCP Message Type */ | |
395 | *e++ = 1; | |
396 | *e++ = message_type; | |
397 | ||
398 | *e++ = 57; /* Maximum DHCP Message Size */ | |
399 | *e++ = 2; | |
400 | *e++ = (576 - 312 + OPT_SIZE) >> 8; | |
401 | *e++ = (576 - 312 + OPT_SIZE) & 0xff; | |
402 | ||
403 | if (ServerID) { | |
404 | int tmp = ntohl (ServerID); | |
405 | ||
406 | *e++ = 54; /* ServerID */ | |
407 | *e++ = 4; | |
408 | *e++ = tmp >> 24; | |
409 | *e++ = tmp >> 16; | |
410 | *e++ = tmp >> 8; | |
411 | *e++ = tmp & 0xff; | |
412 | } | |
413 | ||
414 | if (RequestedIP) { | |
415 | int tmp = ntohl (RequestedIP); | |
416 | ||
417 | *e++ = 50; /* Requested IP */ | |
418 | *e++ = 4; | |
419 | *e++ = tmp >> 24; | |
420 | *e++ = tmp >> 16; | |
421 | *e++ = tmp >> 8; | |
422 | *e++ = tmp & 0xff; | |
423 | } | |
424 | #if defined(CONFIG_BOOTP_SEND_HOSTNAME) | |
425 | if ((hostname = getenv ("hostname"))) { | |
426 | int hostnamelen = strlen (hostname); | |
427 | ||
428 | *e++ = 12; /* Hostname */ | |
429 | *e++ = hostnamelen; | |
430 | memcpy (e, hostname, hostnamelen); | |
431 | e += hostnamelen; | |
432 | } | |
433 | #endif | |
434 | ||
435 | #if defined(CONFIG_BOOTP_VENDOREX) | |
436 | if ((x = dhcp_vendorex_prep (e))) | |
437 | return x - start; | |
438 | #endif | |
439 | ||
440 | *e++ = 55; /* Parameter Request List */ | |
441 | cnt = e++; /* Pointer to count of requested items */ | |
442 | *cnt = 0; | |
443 | #if defined(CONFIG_BOOTP_SUBNETMASK) | |
444 | *e++ = 1; /* Subnet Mask */ | |
445 | *cnt += 1; | |
446 | #endif | |
447 | #if defined(CONFIG_BOOTP_TIMEOFFSET) | |
448 | *e++ = 2; | |
449 | *cnt += 1; | |
450 | #endif | |
451 | #if defined(CONFIG_BOOTP_GATEWAY) | |
452 | *e++ = 3; /* Router Option */ | |
453 | *cnt += 1; | |
454 | #endif | |
455 | #if defined(CONFIG_BOOTP_DNS) | |
456 | *e++ = 6; /* DNS Server(s) */ | |
457 | *cnt += 1; | |
458 | #endif | |
459 | #if defined(CONFIG_BOOTP_HOSTNAME) | |
460 | *e++ = 12; /* Hostname */ | |
461 | *cnt += 1; | |
462 | #endif | |
463 | #if defined(CONFIG_BOOTP_BOOTFILESIZE) | |
464 | *e++ = 13; /* Boot File Size */ | |
465 | *cnt += 1; | |
466 | #endif | |
467 | #if defined(CONFIG_BOOTP_BOOTPATH) | |
468 | *e++ = 17; /* Boot path */ | |
469 | *cnt += 1; | |
470 | #endif | |
471 | #if defined(CONFIG_BOOTP_NISDOMAIN) | |
472 | *e++ = 40; /* NIS Domain name request */ | |
473 | *cnt += 1; | |
474 | #endif | |
475 | #if defined(CONFIG_BOOTP_NTPSERVER) | |
476 | *e++ = 42; | |
477 | *cnt += 1; | |
478 | #endif | |
479 | *e++ = 255; /* End of the list */ | |
480 | ||
481 | /* Pad to minimal length */ | |
482 | #ifdef CONFIG_DHCP_MIN_EXT_LEN | |
483 | while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN) | |
484 | *e++ = 0; | |
485 | #endif | |
486 | ||
487 | return e - start; | |
488 | } | |
489 | ||
490 | #else | |
491 | /* | |
492 | * Warning: no field size check - change CONFIG_BOOTP_* at your own risk! | |
493 | */ | |
494 | static int BootpExtended (u8 * e) | |
495 | { | |
496 | u8 *start = e; | |
497 | ||
498 | *e++ = 99; /* RFC1048 Magic Cookie */ | |
499 | *e++ = 130; | |
500 | *e++ = 83; | |
501 | *e++ = 99; | |
502 | ||
503 | #if defined(CONFIG_CMD_DHCP) | |
504 | *e++ = 53; /* DHCP Message Type */ | |
505 | *e++ = 1; | |
506 | *e++ = DHCP_DISCOVER; | |
507 | ||
508 | *e++ = 57; /* Maximum DHCP Message Size */ | |
509 | *e++ = 2; | |
510 | *e++ = (576 - 312 + OPT_SIZE) >> 16; | |
511 | *e++ = (576 - 312 + OPT_SIZE) & 0xff; | |
512 | #endif | |
513 | ||
514 | #if defined(CONFIG_BOOTP_SUBNETMASK) | |
515 | *e++ = 1; /* Subnet mask request */ | |
516 | *e++ = 4; | |
517 | e += 4; | |
518 | #endif | |
519 | ||
520 | #if defined(CONFIG_BOOTP_GATEWAY) | |
521 | *e++ = 3; /* Default gateway request */ | |
522 | *e++ = 4; | |
523 | e += 4; | |
524 | #endif | |
525 | ||
526 | #if defined(CONFIG_BOOTP_DNS) | |
527 | *e++ = 6; /* Domain Name Server */ | |
528 | *e++ = 4; | |
529 | e += 4; | |
530 | #endif | |
531 | ||
532 | #if defined(CONFIG_BOOTP_HOSTNAME) | |
533 | *e++ = 12; /* Host name request */ | |
534 | *e++ = 32; | |
535 | e += 32; | |
536 | #endif | |
537 | ||
538 | #if defined(CONFIG_BOOTP_BOOTFILESIZE) | |
539 | *e++ = 13; /* Boot file size */ | |
540 | *e++ = 2; | |
541 | e += 2; | |
542 | #endif | |
543 | ||
544 | #if defined(CONFIG_BOOTP_BOOTPATH) | |
545 | *e++ = 17; /* Boot path */ | |
546 | *e++ = 32; | |
547 | e += 32; | |
548 | #endif | |
549 | ||
550 | #if defined(CONFIG_BOOTP_NISDOMAIN) | |
551 | *e++ = 40; /* NIS Domain name request */ | |
552 | *e++ = 32; | |
553 | e += 32; | |
554 | #endif | |
555 | ||
556 | *e++ = 255; /* End of the list */ | |
557 | ||
558 | return e - start; | |
559 | } | |
560 | #endif | |
561 | ||
562 | void | |
563 | BootpRequest (void) | |
564 | { | |
565 | volatile uchar *pkt, *iphdr; | |
566 | Bootp_t *bp; | |
567 | int ext_len, pktlen, iplen; | |
568 | ||
569 | #if defined(CONFIG_CMD_DHCP) | |
570 | dhcp_state = INIT; | |
571 | #endif | |
572 | ||
573 | #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ | |
574 | unsigned char bi_enetaddr[6]; | |
575 | int reg; | |
576 | ulong tst1, tst2, sum, m_mask, m_value = 0; | |
577 | ||
578 | if (BootpTry ==0) { | |
579 | /* get our mac */ | |
580 | eth_getenv_enetaddr("ethaddr", bi_enetaddr); | |
581 | ||
582 | #ifdef DEBUG | |
583 | puts ("BootpRequest => Our Mac: "); | |
584 | for (reg=0; reg<6; reg++) { | |
585 | printf ("%x%c", | |
586 | bi_enetaddr[reg], | |
587 | reg==5 ? '\n' : ':'); | |
588 | } | |
589 | #endif /* DEBUG */ | |
590 | ||
591 | /* Mac-Manipulation 2 get seed1 */ | |
592 | tst1=0; | |
593 | tst2=0; | |
594 | for (reg=2; reg<6; reg++) { | |
595 | tst1 = tst1 << 8; | |
596 | tst1 = tst1 | bi_enetaddr[reg]; | |
597 | } | |
598 | for (reg=0; reg<2; reg++) { | |
599 | tst2 = tst2 | bi_enetaddr[reg]; | |
600 | tst2 = tst2 << 8; | |
601 | } | |
602 | ||
603 | seed1 = tst1^tst2; | |
604 | ||
605 | /* Mirror seed1*/ | |
606 | m_mask=0x1; | |
607 | for (reg=1;reg<=32;reg++) { | |
608 | m_value |= (m_mask & seed1); | |
609 | seed1 = seed1 >> 1; | |
610 | m_value = m_value << 1; | |
611 | } | |
612 | seed1 = m_value; | |
613 | seed2 = 0xB78D0945; | |
614 | } | |
615 | ||
616 | /* Random Number Generator */ | |
617 | ||
618 | for (reg=0;reg<=0;reg++) { | |
619 | sum = seed1 + seed2; | |
620 | if (sum < seed1 || sum < seed2) | |
621 | sum++; | |
622 | seed2 = seed1; | |
623 | seed1 = sum; | |
624 | ||
625 | if (BootpTry<=2) { /* Start with max 1024 * 1ms */ | |
626 | sum = sum >> (22-BootpTry); | |
627 | } else { /*After 3rd BOOTP request max 8192 * 1ms */ | |
628 | sum = sum >> 19; | |
629 | } | |
630 | } | |
631 | ||
632 | printf ("Random delay: %ld ms...\n", sum); | |
633 | for (reg=0; reg <sum; reg++) { | |
634 | udelay(1000); /*Wait 1ms*/ | |
635 | } | |
636 | #endif /* CONFIG_BOOTP_RANDOM_DELAY */ | |
637 | ||
638 | printf("BOOTP broadcast %d\n", ++BootpTry); | |
639 | pkt = NetTxPacket; | |
640 | memset ((void*)pkt, 0, PKTSIZE); | |
641 | ||
642 | pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); | |
643 | ||
644 | /* | |
645 | * Next line results in incorrect packet size being transmitted, resulting | |
646 | * in errors in some DHCP servers, reporting missing bytes. Size must be | |
647 | * set in packet header after extension length has been determined. | |
648 | * C. Hallinan, DS4.COM, Inc. | |
649 | */ | |
650 | /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ | |
651 | iphdr = pkt; /* We need this later for NetSetIP() */ | |
652 | pkt += IP_HDR_SIZE; | |
653 | ||
654 | bp = (Bootp_t *)pkt; | |
655 | bp->bp_op = OP_BOOTREQUEST; | |
656 | bp->bp_htype = HWT_ETHER; | |
657 | bp->bp_hlen = HWL_ETHER; | |
658 | bp->bp_hops = 0; | |
659 | bp->bp_secs = htons(get_timer(0) / 1000); | |
660 | NetWriteIP(&bp->bp_ciaddr, 0); | |
661 | NetWriteIP(&bp->bp_yiaddr, 0); | |
662 | NetWriteIP(&bp->bp_siaddr, 0); | |
663 | NetWriteIP(&bp->bp_giaddr, 0); | |
664 | memcpy (bp->bp_chaddr, NetOurEther, 6); | |
665 | copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); | |
666 | ||
667 | /* Request additional information from the BOOTP/DHCP server */ | |
668 | #if defined(CONFIG_CMD_DHCP) | |
669 | ext_len = DhcpExtended((u8 *)bp->bp_vend, DHCP_DISCOVER, 0, 0); | |
670 | #else | |
671 | ext_len = BootpExtended((u8 *)bp->bp_vend); | |
672 | #endif | |
673 | ||
674 | /* | |
675 | * Bootp ID is the lower 4 bytes of our ethernet address | |
676 | * plus the current time in ms. | |
677 | */ | |
678 | BootpID = ((ulong)NetOurEther[2] << 24) | |
679 | | ((ulong)NetOurEther[3] << 16) | |
680 | | ((ulong)NetOurEther[4] << 8) | |
681 | | (ulong)NetOurEther[5]; | |
682 | BootpID += get_timer(0); | |
683 | BootpID = htonl(BootpID); | |
684 | NetCopyLong(&bp->bp_id, &BootpID); | |
685 | ||
686 | /* | |
687 | * Calculate proper packet lengths taking into account the | |
688 | * variable size of the options field | |
689 | */ | |
690 | pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; | |
691 | iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; | |
692 | NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
693 | NetSetTimeout(SELECT_TIMEOUT, BootpTimeout); | |
694 | ||
695 | #if defined(CONFIG_CMD_DHCP) | |
696 | dhcp_state = SELECTING; | |
697 | NetSetHandler(DhcpHandler); | |
698 | #else | |
699 | NetSetHandler(BootpHandler); | |
700 | #endif | |
701 | NetSendPacket(NetTxPacket, pktlen); | |
702 | } | |
703 | ||
704 | #if defined(CONFIG_CMD_DHCP) | |
705 | static void DhcpOptionsProcess (uchar * popt, Bootp_t *bp) | |
706 | { | |
707 | uchar *end = popt + BOOTP_HDR_SIZE; | |
708 | int oplen, size; | |
709 | ||
710 | while (popt < end && *popt != 0xff) { | |
711 | oplen = *(popt + 1); | |
712 | switch (*popt) { | |
713 | case 1: | |
714 | NetCopyIP (&NetOurSubnetMask, (popt + 2)); | |
715 | break; | |
716 | #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET) | |
717 | case 2: /* Time offset */ | |
718 | NetCopyLong ((ulong *)&NetTimeOffset, (ulong *) (popt + 2)); | |
719 | NetTimeOffset = ntohl (NetTimeOffset); | |
720 | break; | |
721 | #endif | |
722 | case 3: | |
723 | NetCopyIP (&NetOurGatewayIP, (popt + 2)); | |
724 | break; | |
725 | case 6: | |
726 | NetCopyIP (&NetOurDNSIP, (popt + 2)); | |
727 | #if defined(CONFIG_BOOTP_DNS2) | |
728 | if (*(popt + 1) > 4) { | |
729 | NetCopyIP (&NetOurDNS2IP, (popt + 2 + 4)); | |
730 | } | |
731 | #endif | |
732 | break; | |
733 | case 12: | |
734 | size = truncate_sz ("Host Name", sizeof (NetOurHostName), oplen); | |
735 | memcpy (&NetOurHostName, popt + 2, size); | |
736 | NetOurHostName[size] = 0; | |
737 | break; | |
738 | case 15: /* Ignore Domain Name Option */ | |
739 | break; | |
740 | case 17: | |
741 | size = truncate_sz ("Root Path", sizeof (NetOurRootPath), oplen); | |
742 | memcpy (&NetOurRootPath, popt + 2, size); | |
743 | NetOurRootPath[size] = 0; | |
744 | break; | |
745 | #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER) | |
746 | case 42: /* NTP server IP */ | |
747 | NetCopyIP (&NetNtpServerIP, (popt + 2)); | |
748 | break; | |
749 | #endif | |
750 | case 51: | |
751 | NetCopyLong (&dhcp_leasetime, (ulong *) (popt + 2)); | |
752 | break; | |
753 | case 53: /* Ignore Message Type Option */ | |
754 | break; | |
755 | case 54: | |
756 | NetCopyIP (&NetDHCPServerIP, (popt + 2)); | |
757 | break; | |
758 | case 58: /* Ignore Renewal Time Option */ | |
759 | break; | |
760 | case 59: /* Ignore Rebinding Time Option */ | |
761 | break; | |
762 | case 66: /* Ignore TFTP server name */ | |
763 | break; | |
764 | case 67: /* vendor opt bootfile */ | |
765 | /* | |
766 | * I can't use dhcp_vendorex_proc here because I need | |
767 | * to write into the bootp packet - even then I had to | |
768 | * pass the bootp packet pointer into here as the | |
769 | * second arg | |
770 | */ | |
771 | size = truncate_sz ("Opt Boot File", | |
772 | sizeof(bp->bp_file), | |
773 | oplen); | |
774 | if (bp->bp_file[0] == '\0' && size > 0) { | |
775 | /* | |
776 | * only use vendor boot file if we didn't | |
777 | * receive a boot file in the main non-vendor | |
778 | * part of the packet - god only knows why | |
779 | * some vendors chose not to use this perfectly | |
780 | * good spot to store the boot file (join on | |
781 | * Tru64 Unix) it seems mind bogglingly crazy | |
782 | * to me | |
783 | */ | |
784 | printf("*** WARNING: using vendor " | |
785 | "optional boot file\n"); | |
786 | memcpy(bp->bp_file, popt + 2, size); | |
787 | bp->bp_file[size] = '\0'; | |
788 | } | |
789 | break; | |
790 | default: | |
791 | #if defined(CONFIG_BOOTP_VENDOREX) | |
792 | if (dhcp_vendorex_proc (popt)) | |
793 | break; | |
794 | #endif | |
795 | printf ("*** Unhandled DHCP Option in OFFER/ACK: %d\n", *popt); | |
796 | break; | |
797 | } | |
798 | popt += oplen + 2; /* Process next option */ | |
799 | } | |
800 | } | |
801 | ||
802 | static int DhcpMessageType(unsigned char *popt) | |
803 | { | |
804 | if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) | |
805 | return -1; | |
806 | ||
807 | popt += 4; | |
808 | while ( *popt != 0xff ) { | |
809 | if ( *popt == 53 ) /* DHCP Message Type */ | |
810 | return *(popt + 2); | |
811 | popt += *(popt + 1) + 2; /* Scan through all options */ | |
812 | } | |
813 | return -1; | |
814 | } | |
815 | ||
816 | static void DhcpSendRequestPkt(Bootp_t *bp_offer) | |
817 | { | |
818 | volatile uchar *pkt, *iphdr; | |
819 | Bootp_t *bp; | |
820 | int pktlen, iplen, extlen; | |
821 | IPaddr_t OfferedIP; | |
822 | ||
823 | debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); | |
824 | pkt = NetTxPacket; | |
825 | memset ((void*)pkt, 0, PKTSIZE); | |
826 | ||
827 | pkt += NetSetEther(pkt, NetBcastAddr, PROT_IP); | |
828 | ||
829 | iphdr = pkt; /* We'll need this later to set proper pkt size */ | |
830 | pkt += IP_HDR_SIZE; | |
831 | ||
832 | bp = (Bootp_t *)pkt; | |
833 | bp->bp_op = OP_BOOTREQUEST; | |
834 | bp->bp_htype = HWT_ETHER; | |
835 | bp->bp_hlen = HWL_ETHER; | |
836 | bp->bp_hops = 0; | |
837 | bp->bp_secs = htons(get_timer(0) / 1000); | |
838 | /* Do not set the client IP, your IP, or server IP yet, since it hasn't been ACK'ed by | |
839 | * the server yet */ | |
840 | ||
841 | /* | |
842 | * RFC3046 requires Relay Agents to discard packets with | |
843 | * nonzero and offered giaddr | |
844 | */ | |
845 | NetWriteIP(&bp->bp_giaddr, 0); | |
846 | ||
847 | memcpy (bp->bp_chaddr, NetOurEther, 6); | |
848 | ||
849 | /* | |
850 | * ID is the id of the OFFER packet | |
851 | */ | |
852 | ||
853 | NetCopyLong(&bp->bp_id, &bp_offer->bp_id); | |
854 | ||
855 | /* | |
856 | * Copy options from OFFER packet if present | |
857 | */ | |
858 | ||
859 | /* Copy offered IP into the parameters request list */ | |
860 | NetCopyIP(&OfferedIP, &bp_offer->bp_yiaddr); | |
861 | extlen = DhcpExtended((u8 *)bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP); | |
862 | ||
863 | pktlen = ((int)(pkt-NetTxPacket)) + BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; | |
864 | iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; | |
865 | NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
866 | ||
867 | debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); | |
868 | #ifdef CONFIG_BOOTP_DHCP_REQUEST_DELAY | |
869 | udelay(CONFIG_BOOTP_DHCP_REQUEST_DELAY); | |
870 | #endif /* CONFIG_BOOTP_DHCP_REQUEST_DELAY */ | |
871 | NetSendPacket(NetTxPacket, pktlen); | |
872 | } | |
873 | ||
874 | /* | |
875 | * Handle DHCP received packets. | |
876 | */ | |
877 | static void | |
878 | DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
879 | { | |
880 | Bootp_t *bp = (Bootp_t *)pkt; | |
881 | ||
882 | debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", | |
883 | src, dest, len, dhcp_state); | |
884 | ||
885 | if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ | |
886 | return; | |
887 | ||
888 | debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", | |
889 | src, dest, len, dhcp_state); | |
890 | ||
891 | switch (dhcp_state) { | |
892 | case SELECTING: | |
893 | /* | |
894 | * Wait an appropriate time for any potential DHCPOFFER packets | |
895 | * to arrive. Then select one, and generate DHCPREQUEST response. | |
896 | * If filename is in format we recognize, assume it is a valid | |
897 | * OFFER from a server we want. | |
898 | */ | |
899 | debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); | |
900 | #ifdef CONFIG_SYS_BOOTFILE_PREFIX | |
901 | if (strncmp(bp->bp_file, | |
902 | CONFIG_SYS_BOOTFILE_PREFIX, | |
903 | strlen(CONFIG_SYS_BOOTFILE_PREFIX)) == 0 ) { | |
904 | #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ | |
905 | ||
906 | debug ("TRANSITIONING TO REQUESTING STATE\n"); | |
907 | dhcp_state = REQUESTING; | |
908 | ||
909 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
910 | DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); | |
911 | ||
912 | NetSetTimeout(TIMEOUT, BootpTimeout); | |
913 | DhcpSendRequestPkt(bp); | |
914 | #ifdef CONFIG_SYS_BOOTFILE_PREFIX | |
915 | } | |
916 | #endif /* CONFIG_SYS_BOOTFILE_PREFIX */ | |
917 | ||
918 | return; | |
919 | break; | |
920 | case REQUESTING: | |
921 | debug ("DHCP State: REQUESTING\n"); | |
922 | ||
923 | if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) { | |
924 | char *s; | |
925 | ||
926 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
927 | DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp); | |
928 | BootpCopyNetParams(bp); /* Store net params from reply */ | |
929 | dhcp_state = BOUND; | |
930 | printf ("DHCP client bound to address %pI4\n", &NetOurIP); | |
931 | ||
932 | /* Obey the 'autoload' setting */ | |
933 | if ((s = getenv("autoload")) != NULL) { | |
934 | if (*s == 'n') { | |
935 | /* | |
936 | * Just use BOOTP to configure system; | |
937 | * Do not use TFTP to load the bootfile. | |
938 | */ | |
939 | NetState = NETLOOP_SUCCESS; | |
940 | return; | |
941 | #if defined(CONFIG_CMD_NFS) | |
942 | } else if (strcmp(s, "NFS") == 0) { | |
943 | /* | |
944 | * Use NFS to load the bootfile. | |
945 | */ | |
946 | NfsStart(); | |
947 | return; | |
948 | #endif | |
949 | } | |
950 | } | |
951 | TftpStart(); | |
952 | return; | |
953 | } | |
954 | break; | |
955 | case BOUND: | |
956 | /* DHCP client bound to address */ | |
957 | break; | |
958 | default: | |
959 | puts ("DHCP: INVALID STATE\n"); | |
960 | break; | |
961 | } | |
962 | ||
963 | } | |
964 | ||
965 | void DhcpRequest(void) | |
966 | { | |
967 | BootpRequest(); | |
968 | } | |
969 | #endif /* CONFIG_CMD_DHCP */ | |
970 | ||
971 | #endif /* CONFIG_CMD_NET */ |