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Commit | Line | Data |
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3861aa5c WD |
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 2000-2002 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" | |
3861aa5c WD |
27 | #ifdef CONFIG_STATUS_LED |
28 | #include <status_led.h> | |
29 | #endif | |
30 | ||
31 | #define BOOTP_VENDOR_MAGIC 0x63825363 /* RFC1048 Magic Cookie */ | |
32 | ||
33 | #if (CONFIG_COMMANDS & CFG_CMD_NET) | |
34 | ||
35 | #define TIMEOUT 5 /* Seconds before trying BOOTP again */ | |
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 | ||
42 | #define PORT_BOOTPS 67 /* BOOTP server UDP port */ | |
43 | #define PORT_BOOTPC 68 /* BOOTP client UDP port */ | |
44 | ||
45 | #ifndef CONFIG_DHCP_MIN_EXT_LEN /* minimal length of extension list */ | |
46 | #define CONFIG_DHCP_MIN_EXT_LEN 64 | |
47 | #endif | |
48 | ||
49 | ulong BootpID; | |
50 | int BootpTry; | |
51 | #ifdef CONFIG_BOOTP_RANDOM_DELAY | |
52 | ulong seed1, seed2; | |
53 | #endif | |
54 | ||
55 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
56 | dhcp_state_t dhcp_state = INIT; | |
682011ff | 57 | unsigned long dhcp_leasetime = 0; |
759a51b4 | 58 | IPaddr_t NetDHCPServerIP = 0; |
3861aa5c WD |
59 | static void DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len); |
60 | ||
61 | /* For Debug */ | |
3e38691e WD |
62 | #if 0 |
63 | static char *dhcpmsg2str(int type) | |
3861aa5c WD |
64 | { |
65 | switch (type) { | |
66 | case 1: return "DHCPDISCOVER"; break; | |
67 | case 2: return "DHCPOFFER"; break; | |
68 | case 3: return "DHCPREQUEST"; break; | |
69 | case 4: return "DHCPDECLINE"; break; | |
70 | case 5: return "DHCPACK"; break; | |
71 | case 6: return "DHCPNACK"; break; | |
72 | case 7: return "DHCPRELEASE"; break; | |
73 | default: return "UNKNOWN/INVALID MSG TYPE"; break; | |
74 | } | |
75 | } | |
3e38691e | 76 | #endif |
3861aa5c WD |
77 | |
78 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) | |
79 | extern u8 *dhcp_vendorex_prep (u8 *e); /*rtn new e after add own opts. */ | |
80 | extern u8 *dhcp_vendorex_proc (u8 *e); /*rtn next e if mine,else NULL */ | |
81 | #endif | |
82 | ||
83 | #endif /* CFG_CMD_DHCP */ | |
84 | ||
85 | static int BootpCheckPkt(uchar *pkt, unsigned dest, unsigned src, unsigned len) | |
86 | { | |
87 | Bootp_t *bp = (Bootp_t *) pkt; | |
88 | int retval = 0; | |
89 | ||
90 | if (dest != PORT_BOOTPC || src != PORT_BOOTPS) | |
91 | retval = -1; | |
92 | else if (len < sizeof (Bootp_t) - OPT_SIZE) | |
93 | retval = -2; | |
94 | else if (bp->bp_op != OP_BOOTREQUEST && | |
95 | bp->bp_op != OP_BOOTREPLY && | |
96 | bp->bp_op != DHCP_OFFER && | |
97 | bp->bp_op != DHCP_ACK && | |
98 | bp->bp_op != DHCP_NAK ) { | |
99 | retval = -3; | |
100 | } | |
101 | else if (bp->bp_htype != HWT_ETHER) | |
102 | retval = -4; | |
103 | else if (bp->bp_hlen != HWL_ETHER) | |
104 | retval = -5; | |
105 | else if (NetReadLong((ulong*)&bp->bp_id) != BootpID) { | |
106 | retval = -6; | |
107 | } | |
108 | ||
109 | debug ("Filtering pkt = %d\n", retval); | |
110 | ||
111 | return retval; | |
112 | } | |
113 | ||
114 | /* | |
115 | * Copy parameters of interest from BOOTP_REPLY/DHCP_OFFER packet | |
116 | */ | |
3e38691e | 117 | static void BootpCopyNetParams(Bootp_t *bp) |
3861aa5c WD |
118 | { |
119 | NetCopyIP(&NetOurIP, &bp->bp_yiaddr); | |
120 | NetCopyIP(&NetServerIP, &bp->bp_siaddr); | |
121 | memcpy (NetServerEther, ((Ethernet_t *)NetRxPkt)->et_src, 6); | |
122 | copy_filename (BootFile, bp->bp_file, sizeof(BootFile)); | |
123 | ||
124 | debug ("Bootfile: %s\n", BootFile); | |
125 | ||
126 | /* Propagate to environment: | |
8bde7f77 | 127 | * don't delete exising entry when BOOTP / DHCP reply does |
3861aa5c WD |
128 | * not contain a new value |
129 | */ | |
130 | if (*BootFile) { | |
131 | setenv ("bootfile", BootFile); | |
132 | } | |
133 | } | |
134 | ||
135 | static int truncate_sz (const char *name, int maxlen, int curlen) | |
136 | { | |
137 | if (curlen >= maxlen) { | |
138 | printf("*** WARNING: %s is too long (%d - max: %d) - truncated\n", | |
139 | name, curlen, maxlen); | |
140 | curlen = maxlen - 1; | |
141 | } | |
142 | return (curlen); | |
143 | } | |
144 | ||
145 | #if !(CONFIG_COMMANDS & CFG_CMD_DHCP) | |
146 | ||
147 | static void BootpVendorFieldProcess(u8 *ext) | |
148 | { | |
149 | int size = *(ext+1) ; | |
150 | ||
151 | debug_ext ("[BOOTP] Processing extension %d... (%d bytes)\n", *ext, *(ext+1)); | |
152 | ||
153 | NetBootFileSize = 0; | |
154 | ||
155 | switch (*ext) { | |
156 | /* Fixed length fields */ | |
157 | case 1: /* Subnet mask */ | |
158 | if (NetOurSubnetMask == 0) | |
159 | NetCopyIP(&NetOurSubnetMask, (IPaddr_t*)(ext+2)); | |
160 | break; | |
161 | case 2: /* Time offset - Not yet supported */ | |
162 | break; | |
163 | /* Variable length fields */ | |
164 | case 3: /* Gateways list */ | |
165 | if (NetOurGatewayIP == 0) { | |
166 | NetCopyIP(&NetOurGatewayIP, (IPaddr_t*)(ext+2)); | |
167 | } | |
168 | break; | |
169 | case 4: /* Time server - Not yet supported */ | |
170 | break; | |
171 | case 5: /* IEN-116 name server - Not yet supported */ | |
172 | break; | |
173 | case 6: | |
174 | if (NetOurDNSIP == 0) { | |
175 | NetCopyIP(&NetOurDNSIP, (IPaddr_t*)(ext+2)); | |
176 | } | |
fe389a82 SR |
177 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2) |
178 | if ((NetOurDNS2IP == 0) && (size > 4)) { | |
179 | NetCopyIP(&NetOurDNS2IP, (IPaddr_t*)(ext+2+4)); | |
180 | } | |
181 | #endif | |
3861aa5c WD |
182 | break; |
183 | case 7: /* Log server - Not yet supported */ | |
184 | break; | |
185 | case 8: /* Cookie/Quote server - Not yet supported */ | |
186 | break; | |
187 | case 9: /* LPR server - Not yet supported */ | |
188 | break; | |
189 | case 10: /* Impress server - Not yet supported */ | |
190 | break; | |
191 | case 11: /* RPL server - Not yet supported */ | |
192 | break; | |
193 | case 12: /* Host name */ | |
194 | if (NetOurHostName[0] == 0) { | |
195 | size = truncate_sz("Host Name", sizeof(NetOurHostName), size); | |
196 | memcpy(&NetOurHostName, ext+2, size); | |
197 | NetOurHostName[size] = 0 ; | |
198 | } | |
199 | break; | |
200 | case 13: /* Boot file size */ | |
201 | if (size == 2) | |
202 | NetBootFileSize = ntohs(*(ushort*)(ext+2)); | |
203 | else if (size == 4) | |
204 | NetBootFileSize = ntohl(*(ulong*)(ext+2)); | |
205 | break; | |
206 | case 14: /* Merit dump file - Not yet supported */ | |
207 | break; | |
208 | case 15: /* Domain name - Not yet supported */ | |
209 | break; | |
210 | case 16: /* Swap server - Not yet supported */ | |
211 | break; | |
212 | case 17: /* Root path */ | |
213 | if (NetOurRootPath[0] == 0) { | |
214 | size = truncate_sz("Root Path", sizeof(NetOurRootPath), size); | |
215 | memcpy(&NetOurRootPath, ext+2, size); | |
216 | NetOurRootPath[size] = 0 ; | |
217 | } | |
218 | break; | |
219 | case 18: /* Extension path - Not yet supported */ | |
220 | /* | |
8bde7f77 WD |
221 | * This can be used to send the information of the |
222 | * vendor area in another file that the client can | |
223 | * access via TFTP. | |
3861aa5c WD |
224 | */ |
225 | break; | |
226 | /* IP host layer fields */ | |
227 | case 40: /* NIS Domain name */ | |
228 | if (NetOurNISDomain[0] == 0) { | |
229 | size = truncate_sz ("NIS Domain Name", | |
8bde7f77 | 230 | sizeof(NetOurNISDomain), |
3861aa5c WD |
231 | size); |
232 | memcpy(&NetOurNISDomain, ext+2, size); | |
233 | NetOurNISDomain[size] = 0 ; | |
234 | } | |
235 | break; | |
236 | /* Application layer fields */ | |
237 | case 43: /* Vendor specific info - Not yet supported */ | |
238 | /* | |
8bde7f77 WD |
239 | * Binary information to exchange specific |
240 | * product information. | |
3861aa5c WD |
241 | */ |
242 | break; | |
243 | /* Reserved (custom) fields (128..254) */ | |
244 | } | |
245 | } | |
246 | ||
247 | static void BootpVendorProcess(u8 *ext, int size) | |
248 | { | |
249 | u8 *end = ext + size ; | |
250 | ||
251 | debug_ext ("[BOOTP] Checking extension (%d bytes)...\n", size); | |
252 | ||
253 | while ((ext < end) && (*ext != 0xff)) { | |
254 | if (*ext == 0) { | |
255 | ext ++ ; | |
256 | } else { | |
257 | u8 *opt = ext ; | |
258 | ext += ext[1] + 2 ; | |
259 | if (ext <= end) | |
260 | BootpVendorFieldProcess (opt) ; | |
261 | } | |
262 | } | |
263 | ||
264 | #ifdef DEBUG_BOOTP_EXT | |
265 | printf("[BOOTP] Received fields: \n"); | |
266 | if (NetOurSubnetMask) { | |
267 | puts ("NetOurSubnetMask : "); | |
268 | print_IPaddr (NetOurSubnetMask); | |
269 | putc('\n'); | |
270 | } | |
271 | ||
272 | if (NetOurGatewayIP) { | |
273 | puts ("NetOurGatewayIP : "); | |
274 | print_IPaddr (NetOurGatewayIP); | |
275 | putc('\n'); | |
276 | } | |
277 | ||
278 | if (NetBootFileSize) { | |
279 | printf("NetBootFileSize : %d\n", NetBootFileSize); | |
280 | } | |
281 | ||
282 | if (NetOurHostName[0]) { | |
283 | printf("NetOurHostName : %s\n", NetOurHostName); | |
284 | } | |
285 | ||
286 | if (NetOurRootPath[0]) { | |
287 | printf("NetOurRootPath : %s\n", NetOurRootPath); | |
288 | } | |
289 | ||
290 | if (NetOurNISDomain[0]) { | |
8bde7f77 | 291 | printf("NetOurNISDomain : %s\n", NetOurNISDomain); |
3861aa5c WD |
292 | } |
293 | ||
294 | if (NetBootFileSize) { | |
295 | printf("NetBootFileSize: %d\n", NetBootFileSize); | |
296 | } | |
297 | #endif /* DEBUG_BOOTP_EXT */ | |
298 | } | |
299 | ||
300 | /* | |
301 | * Handle a BOOTP received packet. | |
302 | */ | |
303 | static void | |
304 | BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
305 | { | |
306 | Bootp_t *bp; | |
307 | char *s; | |
308 | ||
309 | debug ("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%d)\n", | |
310 | src, dest, len, sizeof (Bootp_t)); | |
311 | ||
312 | bp = (Bootp_t *)pkt; | |
313 | ||
314 | if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ | |
315 | return; | |
316 | ||
317 | /* | |
318 | * Got a good BOOTP reply. Copy the data into our variables. | |
319 | */ | |
320 | #ifdef CONFIG_STATUS_LED | |
321 | status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF); | |
322 | #endif | |
323 | ||
324 | BootpCopyNetParams(bp); /* Store net parameters from reply */ | |
325 | ||
326 | /* Retrieve extended information (we must parse the vendor area) */ | |
327 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
328 | BootpVendorProcess(&bp->bp_vend[4], len); | |
329 | ||
330 | NetSetTimeout(0, (thand_f *)0); | |
331 | ||
332 | debug ("Got good BOOTP\n"); | |
333 | ||
334 | if (((s = getenv("autoload")) != NULL) && (*s == 'n')) { | |
335 | /* | |
336 | * Just use BOOTP to configure system; | |
337 | * Do not use TFTP to load the bootfile. | |
338 | */ | |
339 | NetState = NETLOOP_SUCCESS; | |
340 | return; | |
341 | } | |
342 | ||
73a8b27c | 343 | TftpStart(); |
3861aa5c WD |
344 | } |
345 | #endif /* !CFG_CMD_DHCP */ | |
346 | ||
347 | /* | |
348 | * Timeout on BOOTP/DHCP request. | |
349 | */ | |
350 | static void | |
351 | BootpTimeout(void) | |
352 | { | |
353 | if (BootpTry >= TIMEOUT_COUNT) { | |
354 | puts ("\nRetry count exceeded; starting again\n"); | |
355 | NetStartAgain (); | |
356 | } else { | |
357 | NetSetTimeout (TIMEOUT * CFG_HZ, BootpTimeout); | |
358 | BootpRequest (); | |
359 | } | |
360 | } | |
361 | ||
362 | /* | |
363 | * Initialize BOOTP extension fields in the request. | |
364 | */ | |
365 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
366 | static int DhcpExtended(u8 *e, int message_type, IPaddr_t ServerID, IPaddr_t RequestedIP) | |
367 | { | |
368 | u8 *start = e ; | |
369 | u8 *cnt; | |
370 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) | |
371 | u8 *x; | |
372 | #endif | |
fe389a82 SR |
373 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SEND_HOSTNAME) |
374 | uchar *hostname; | |
375 | #endif | |
3861aa5c WD |
376 | |
377 | *e++ = 99; /* RFC1048 Magic Cookie */ | |
378 | *e++ = 130; | |
379 | *e++ = 83; | |
380 | *e++ = 99; | |
381 | ||
382 | *e++ = 53; /* DHCP Message Type */ | |
383 | *e++ = 1; | |
384 | *e++ = message_type; | |
385 | ||
386 | *e++ = 57; /* Maximum DHCP Message Size */ | |
387 | *e++ = 2; | |
388 | *e++ = (576-312+OPT_SIZE) >> 8; | |
389 | *e++ = (576-312+OPT_SIZE) & 0xff; | |
390 | ||
391 | if ( ServerID ) { | |
8bde7f77 | 392 | int tmp = ntohl(ServerID); |
3861aa5c WD |
393 | |
394 | *e++ = 54; /* ServerID */ | |
395 | *e++ = 4; | |
396 | *e++ = tmp >> 24; | |
397 | *e++ = tmp >> 16; | |
398 | *e++ = tmp >> 8; | |
399 | *e++ = tmp & 0xff; | |
400 | } | |
401 | ||
402 | if ( RequestedIP ) { | |
8bde7f77 | 403 | int tmp = ntohl(RequestedIP); |
3861aa5c WD |
404 | |
405 | *e++ = 50; /* Requested IP */ | |
406 | *e++ = 4; | |
407 | *e++ = tmp >> 24; | |
408 | *e++ = tmp >> 16; | |
409 | *e++ = tmp >> 8; | |
410 | *e++ = tmp & 0xff; | |
411 | } | |
412 | ||
fe389a82 SR |
413 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SEND_HOSTNAME) |
414 | if ( (hostname = getenv("hostname")) ) { | |
415 | int hostnamelen = strlen(hostname); | |
416 | *e++ = 12; /* Hostname */ | |
417 | *e++ = hostnamelen; | |
418 | memcpy(e,hostname,hostnamelen); | |
419 | e += hostnamelen; | |
420 | } | |
421 | #endif | |
422 | ||
3861aa5c WD |
423 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) |
424 | if ((x = dhcp_vendorex_prep (e))) | |
8bde7f77 | 425 | return x - start ; |
3861aa5c WD |
426 | #endif |
427 | ||
428 | *e++ = 55; /* Parameter Request List */ | |
429 | cnt = e++; /* Pointer to count of requested items */ | |
430 | *cnt = 0; | |
431 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK) | |
432 | *e++ = 1; /* Subnet Mask */ | |
433 | *cnt += 1; | |
434 | #endif | |
435 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY) | |
436 | *e++ = 3; /* Router Option */ | |
437 | *cnt += 1; | |
438 | #endif | |
439 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS) | |
440 | *e++ = 6; /* DNS Server(s) */ | |
441 | *cnt += 1; | |
442 | #endif | |
443 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME) | |
444 | *e++ = 12; /* Hostname */ | |
445 | *cnt += 1; | |
446 | #endif | |
447 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE) | |
448 | *e++ = 13; /* Boot File Size */ | |
449 | *cnt += 1; | |
450 | #endif | |
451 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH) | |
452 | *e++ = 17; /* Boot path */ | |
453 | *cnt += 1; | |
454 | #endif | |
455 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN) | |
456 | *e++ = 40; /* NIS Domain name request */ | |
457 | *cnt += 1; | |
458 | #endif | |
459 | *e++ = 255; /* End of the list */ | |
460 | ||
461 | /* Pad to minimal length */ | |
462 | #ifdef CONFIG_DHCP_MIN_EXT_LEN | |
463 | while ((e - start) <= CONFIG_DHCP_MIN_EXT_LEN) | |
464 | *e++ = 0; | |
465 | #endif | |
466 | ||
467 | return e - start ; | |
468 | } | |
469 | ||
470 | #else /* CFG_CMD_DHCP */ | |
471 | /* | |
472 | * Warning: no field size check - change CONFIG_BOOTP_MASK at your own risk! | |
473 | */ | |
474 | static int BootpExtended (u8 *e) | |
475 | { | |
476 | u8 *start = e ; | |
477 | ||
478 | *e++ = 99; /* RFC1048 Magic Cookie */ | |
479 | *e++ = 130; | |
480 | *e++ = 83; | |
481 | *e++ = 99; | |
482 | ||
483 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
484 | *e++ = 53; /* DHCP Message Type */ | |
485 | *e++ = 1; | |
486 | *e++ = DHCP_DISCOVER; | |
487 | ||
488 | *e++ = 57; /* Maximum DHCP Message Size */ | |
489 | *e++ = 2; | |
490 | *e++ = (576-312+OPT_SIZE) >> 16; | |
491 | *e++ = (576-312+OPT_SIZE) & 0xff; | |
492 | #endif /* CFG_CMD_DHCP */ | |
493 | ||
494 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_SUBNETMASK) | |
495 | *e++ = 1; /* Subnet mask request */ | |
496 | *e++ = 4; | |
497 | e += 4; | |
498 | #endif | |
499 | ||
500 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_GATEWAY) | |
501 | *e++ = 3; /* Default gateway request */ | |
502 | *e++ = 4; | |
503 | e += 4; | |
504 | #endif | |
505 | ||
506 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS) | |
507 | *e++ = 6; /* Domain Name Server */ | |
508 | *e++ = 4; | |
509 | e += 4; | |
510 | #endif | |
511 | ||
512 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_HOSTNAME) | |
513 | *e++ = 12; /* Host name request */ | |
514 | *e++ = 32; | |
515 | e += 32; | |
516 | #endif | |
517 | ||
518 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTFILESIZE) | |
519 | *e++ = 13; /* Boot file size */ | |
520 | *e++ = 2; | |
521 | e += 2; | |
522 | #endif | |
523 | ||
524 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_BOOTPATH) | |
525 | *e++ = 17; /* Boot path */ | |
526 | *e++ = 32; | |
527 | e += 32; | |
528 | #endif | |
529 | ||
530 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_NISDOMAIN) | |
531 | *e++ = 40; /* NIS Domain name request */ | |
532 | *e++ = 32; | |
533 | e += 32; | |
534 | #endif | |
535 | ||
536 | *e++ = 255; /* End of the list */ | |
537 | ||
538 | return e - start ; | |
539 | } | |
540 | #endif /* CFG_CMD_DHCP */ | |
541 | ||
542 | void | |
543 | BootpRequest (void) | |
544 | { | |
545 | volatile uchar *pkt, *iphdr; | |
546 | Bootp_t *bp; | |
547 | int ext_len, pktlen, iplen; | |
548 | ||
549 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
550 | dhcp_state = INIT; | |
551 | #endif | |
552 | ||
553 | #ifdef CONFIG_BOOTP_RANDOM_DELAY /* Random BOOTP delay */ | |
554 | unsigned char bi_enetaddr[6]; | |
555 | int reg; | |
556 | char *e,*s; | |
557 | uchar tmp[64]; | |
558 | ulong tst1, tst2, sum, m_mask, m_value = 0; | |
559 | ||
560 | if (BootpTry ==0) { | |
561 | /* get our mac */ | |
562 | reg = getenv_r ("ethaddr", tmp, sizeof(tmp)); | |
563 | s = (reg > 0) ? tmp : NULL; | |
564 | ||
565 | for (reg=0; reg<6; ++reg) { | |
566 | bi_enetaddr[reg] = s ? simple_strtoul(s, &e, 16) : 0; | |
567 | if (s) { | |
568 | s = (*e) ? e+1 : e; | |
569 | } | |
570 | } | |
571 | #ifdef DEBUG | |
572 | printf("BootpRequest => Our Mac: "); | |
573 | for (reg=0; reg<6; reg++) { | |
574 | printf ("%x%c", | |
575 | bi_enetaddr[reg], | |
576 | reg==5 ? '\n' : ':'); | |
577 | } | |
578 | #endif /* DEBUG */ | |
579 | ||
580 | /* Mac-Manipulation 2 get seed1 */ | |
581 | tst1=0; | |
582 | tst2=0; | |
583 | for (reg=2; reg<6; reg++) { | |
584 | tst1 = tst1 << 8; | |
585 | tst1 = tst1 | bi_enetaddr[reg]; | |
586 | } | |
587 | for (reg=0; reg<2; reg++) { | |
588 | tst2 = tst2 | bi_enetaddr[reg]; | |
589 | tst2 = tst2 << 8; | |
590 | } | |
591 | ||
592 | seed1 = tst1^tst2; | |
593 | ||
594 | /* Mirror seed1*/ | |
595 | m_mask=0x1; | |
596 | for (reg=1;reg<=32;reg++) { | |
597 | m_value |= (m_mask & seed1); | |
598 | seed1 = seed1 >> 1; | |
599 | m_value = m_value << 1; | |
600 | } | |
601 | seed1 = m_value; | |
602 | seed2 = 0xB78D0945; | |
603 | } | |
604 | ||
605 | /* Random Number Generator */ | |
606 | ||
607 | for (reg=0;reg<=0;reg++) { | |
608 | sum = seed1 + seed2; | |
609 | if (sum < seed1 || sum < seed2) | |
610 | sum++; | |
8bde7f77 | 611 | seed2 = seed1; |
3861aa5c WD |
612 | seed1 = sum; |
613 | ||
614 | if (BootpTry<=2) { /* Start with max 1024 * 1ms */ | |
615 | sum = sum >> (22-BootpTry); | |
616 | } else { /*After 3rd BOOTP request max 8192 * 1ms */ | |
617 | sum = sum >> 19; | |
618 | } | |
619 | } | |
620 | ||
621 | printf ("Random delay: %ld ms...\n", sum); | |
622 | for (reg=0; reg <sum; reg++) { | |
623 | udelay(1000); /*Wait 1ms*/ | |
624 | } | |
625 | #endif /* CONFIG_BOOTP_RANDOM_DELAY */ | |
626 | ||
627 | printf("BOOTP broadcast %d\n", ++BootpTry); | |
628 | pkt = NetTxPacket; | |
629 | memset ((void*)pkt, 0, PKTSIZE); | |
630 | ||
631 | NetSetEther(pkt, NetBcastAddr, PROT_IP); | |
632 | pkt += ETHER_HDR_SIZE; | |
633 | ||
634 | /* | |
635 | * Next line results in incorrect packet size being transmitted, resulting | |
636 | * in errors in some DHCP servers, reporting missing bytes. Size must be | |
637 | * set in packet header after extension length has been determined. | |
638 | * C. Hallinan, DS4.COM, Inc. | |
639 | */ | |
640 | /* NetSetIP(pkt, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, sizeof (Bootp_t)); */ | |
641 | iphdr = pkt; /* We need this later for NetSetIP() */ | |
642 | pkt += IP_HDR_SIZE; | |
643 | ||
644 | bp = (Bootp_t *)pkt; | |
645 | bp->bp_op = OP_BOOTREQUEST; | |
646 | bp->bp_htype = HWT_ETHER; | |
647 | bp->bp_hlen = HWL_ETHER; | |
648 | bp->bp_hops = 0; | |
649 | bp->bp_secs = htons(get_timer(0) / CFG_HZ); | |
650 | NetWriteIP(&bp->bp_ciaddr, 0); | |
651 | NetWriteIP(&bp->bp_yiaddr, 0); | |
652 | NetWriteIP(&bp->bp_siaddr, 0); | |
653 | NetWriteIP(&bp->bp_giaddr, 0); | |
654 | memcpy (bp->bp_chaddr, NetOurEther, 6); | |
655 | copy_filename (bp->bp_file, BootFile, sizeof(bp->bp_file)); | |
656 | ||
657 | /* Request additional information from the BOOTP/DHCP server */ | |
658 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
659 | ext_len = DhcpExtended(bp->bp_vend, DHCP_DISCOVER, 0, 0); | |
660 | #else | |
661 | ext_len = BootpExtended(bp->bp_vend); | |
662 | #endif /* CFG_CMD_DHCP */ | |
663 | ||
664 | /* | |
665 | * Bootp ID is the lower 4 bytes of our ethernet address | |
666 | * plus the current time in HZ. | |
667 | */ | |
668 | BootpID = ((ulong)NetOurEther[2] << 24) | |
669 | | ((ulong)NetOurEther[3] << 16) | |
670 | | ((ulong)NetOurEther[4] << 8) | |
671 | | (ulong)NetOurEther[5]; | |
672 | BootpID += get_timer(0); | |
673 | BootpID = htonl(BootpID); | |
674 | NetCopyLong(&bp->bp_id, &BootpID); | |
675 | ||
676 | /* | |
677 | * Calculate proper packet lengths taking into account the | |
678 | * variable size of the options field | |
679 | */ | |
680 | pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + ext_len; | |
681 | iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + ext_len; | |
682 | NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
683 | NetSetTimeout(SELECT_TIMEOUT * CFG_HZ, BootpTimeout); | |
684 | ||
685 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
686 | dhcp_state = SELECTING; | |
687 | NetSetHandler(DhcpHandler); | |
688 | #else | |
689 | NetSetHandler(BootpHandler); | |
690 | #endif /* CFG_CMD_DHCP */ | |
691 | NetSendPacket(NetTxPacket, pktlen); | |
692 | } | |
693 | ||
694 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
3e38691e | 695 | static void DhcpOptionsProcess(uchar *popt) |
3861aa5c | 696 | { |
3e38691e | 697 | uchar *end = popt + BOOTP_HDR_SIZE; |
3861aa5c WD |
698 | int oplen, size; |
699 | ||
700 | while ( popt < end && *popt != 0xff ) { | |
701 | oplen = *(popt + 1); | |
702 | switch(*popt) { | |
703 | case 1: | |
704 | NetCopyIP(&NetOurSubnetMask, (popt+2)); | |
705 | break; | |
706 | case 3: | |
707 | NetCopyIP(&NetOurGatewayIP, (popt+2)); | |
708 | break; | |
709 | case 6: | |
710 | NetCopyIP(&NetOurDNSIP, (popt+2)); | |
fe389a82 SR |
711 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2) |
712 | if ( *(popt+1) > 4 ) { | |
713 | NetCopyIP(&NetOurDNS2IP, (popt+2+4)); | |
714 | } | |
715 | #endif | |
3861aa5c WD |
716 | break; |
717 | case 12: | |
718 | size = truncate_sz ("Host Name", | |
719 | sizeof(NetOurHostName), | |
720 | oplen); | |
721 | memcpy(&NetOurHostName, popt+2, size); | |
722 | NetOurHostName[size] = 0 ; | |
723 | break; | |
724 | case 15: /* Ignore Domain Name Option */ | |
725 | break; | |
726 | case 17: | |
727 | size = truncate_sz ("Root Path", | |
728 | sizeof(NetOurRootPath), | |
729 | oplen); | |
730 | memcpy(&NetOurRootPath, popt+2, size); | |
731 | NetOurRootPath[size] = 0 ; | |
732 | break; | |
733 | case 51: | |
682011ff | 734 | NetCopyLong (&dhcp_leasetime, (ulong *)(popt + 2)); |
3861aa5c WD |
735 | break; |
736 | case 53: /* Ignore Message Type Option */ | |
737 | break; | |
738 | case 54: | |
759a51b4 | 739 | NetCopyIP(&NetDHCPServerIP, (popt+2)); |
3861aa5c WD |
740 | break; |
741 | case 58: /* Ignore Renewal Time Option */ | |
742 | break; | |
743 | case 59: /* Ignore Rebinding Time Option */ | |
744 | break; | |
745 | default: | |
746 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_VENDOREX) | |
747 | if (dhcp_vendorex_proc(popt)) | |
8bde7f77 | 748 | break; |
3861aa5c WD |
749 | #endif |
750 | printf("*** Unhandled DHCP Option in OFFER/ACK: %d\n", | |
751 | *popt); | |
752 | break; | |
753 | } | |
754 | popt += oplen + 2; /* Process next option */ | |
755 | } | |
756 | } | |
757 | ||
758 | static int DhcpMessageType(unsigned char *popt) | |
759 | { | |
760 | if (NetReadLong((ulong*)popt) != htonl(BOOTP_VENDOR_MAGIC)) | |
761 | return -1; | |
762 | ||
763 | popt += 4; | |
764 | while ( *popt != 0xff ) { | |
765 | if ( *popt == 53 ) /* DHCP Message Type */ | |
766 | return *(popt + 2); | |
767 | popt += *(popt + 1) + 2; /* Scan through all options */ | |
768 | } | |
769 | return -1; | |
770 | } | |
771 | ||
3e38691e | 772 | static void DhcpSendRequestPkt(Bootp_t *bp_offer) |
3861aa5c WD |
773 | { |
774 | volatile uchar *pkt, *iphdr; | |
775 | Bootp_t *bp; | |
776 | int pktlen, iplen, extlen; | |
47cd00fa | 777 | IPaddr_t OfferedIP; |
3861aa5c WD |
778 | |
779 | debug ("DhcpSendRequestPkt: Sending DHCPREQUEST\n"); | |
780 | pkt = NetTxPacket; | |
781 | memset ((void*)pkt, 0, PKTSIZE); | |
782 | ||
783 | NetSetEther(pkt, NetBcastAddr, PROT_IP); | |
784 | pkt += ETHER_HDR_SIZE; | |
785 | ||
786 | iphdr = pkt; /* We'll need this later to set proper pkt size */ | |
787 | pkt += IP_HDR_SIZE; | |
788 | ||
789 | bp = (Bootp_t *)pkt; | |
790 | bp->bp_op = OP_BOOTREQUEST; | |
791 | bp->bp_htype = HWT_ETHER; | |
792 | bp->bp_hlen = HWL_ETHER; | |
793 | bp->bp_hops = 0; | |
794 | bp->bp_secs = htons(get_timer(0) / CFG_HZ); | |
795 | NetCopyIP(&bp->bp_ciaddr, &bp_offer->bp_ciaddr); /* both in network byte order */ | |
796 | NetCopyIP(&bp->bp_yiaddr, &bp_offer->bp_yiaddr); | |
797 | NetCopyIP(&bp->bp_siaddr, &bp_offer->bp_siaddr); | |
798 | NetCopyIP(&bp->bp_giaddr, &bp_offer->bp_giaddr); | |
799 | memcpy (bp->bp_chaddr, NetOurEther, 6); | |
800 | ||
801 | /* | |
802 | * ID is the id of the OFFER packet | |
803 | */ | |
804 | ||
805 | NetCopyLong(&bp->bp_id, &bp_offer->bp_id); | |
806 | ||
807 | /* | |
808 | * Copy options from OFFER packet if present | |
809 | */ | |
47cd00fa | 810 | NetCopyIP(&OfferedIP, &bp->bp_yiaddr); |
759a51b4 | 811 | extlen = DhcpExtended(bp->bp_vend, DHCP_REQUEST, NetDHCPServerIP, OfferedIP); |
3861aa5c WD |
812 | |
813 | pktlen = BOOTP_SIZE - sizeof(bp->bp_vend) + extlen; | |
814 | iplen = BOOTP_HDR_SIZE - sizeof(bp->bp_vend) + extlen; | |
815 | NetSetIP(iphdr, 0xFFFFFFFFL, PORT_BOOTPS, PORT_BOOTPC, iplen); | |
816 | ||
817 | debug ("Transmitting DHCPREQUEST packet: len = %d\n", pktlen); | |
818 | NetSendPacket(NetTxPacket, pktlen); | |
819 | } | |
820 | ||
821 | /* | |
822 | * Handle DHCP received packets. | |
823 | */ | |
824 | static void | |
825 | DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
826 | { | |
827 | Bootp_t *bp = (Bootp_t *)pkt; | |
828 | ||
829 | debug ("DHCPHandler: got packet: (src=%d, dst=%d, len=%d) state: %d\n", | |
830 | src, dest, len, dhcp_state); | |
831 | ||
832 | if (BootpCheckPkt(pkt, dest, src, len)) /* Filter out pkts we don't want */ | |
833 | return; | |
834 | ||
835 | debug ("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state: %d\n", | |
836 | src, dest, len, dhcp_state); | |
837 | ||
838 | switch (dhcp_state) { | |
839 | case SELECTING: | |
840 | /* | |
841 | * Wait an appropriate time for any potential DHCPOFFER packets | |
842 | * to arrive. Then select one, and generate DHCPREQUEST response. | |
843 | * If filename is in format we recognize, assume it is a valid | |
844 | * OFFER from a server we want. | |
845 | */ | |
846 | debug ("DHCP: state=SELECTING bp_file: \"%s\"\n", bp->bp_file); | |
847 | #ifdef CFG_BOOTFILE_PREFIX | |
848 | if (strncmp(bp->bp_file, | |
849 | CFG_BOOTFILE_PREFIX, | |
850 | strlen(CFG_BOOTFILE_PREFIX)) == 0 ) { | |
851 | #endif /* CFG_BOOTFILE_PREFIX */ | |
852 | ||
853 | debug ("TRANSITIONING TO REQUESTING STATE\n"); | |
854 | dhcp_state = REQUESTING; | |
759a51b4 | 855 | |
3861aa5c WD |
856 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) |
857 | DhcpOptionsProcess(&bp->bp_vend[4]); | |
858 | ||
3861aa5c WD |
859 | BootpCopyNetParams(bp); /* Store net params from reply */ |
860 | ||
861 | NetSetTimeout(TIMEOUT * CFG_HZ, BootpTimeout); | |
862 | DhcpSendRequestPkt(bp); | |
863 | #ifdef CFG_BOOTFILE_PREFIX | |
864 | } | |
865 | #endif /* CFG_BOOTFILE_PREFIX */ | |
866 | ||
867 | return; | |
868 | break; | |
869 | case REQUESTING: | |
870 | debug ("DHCP State: REQUESTING\n"); | |
871 | ||
872 | if ( DhcpMessageType(bp->bp_vend) == DHCP_ACK ) { | |
873 | char *s; | |
874 | ||
875 | if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC)) | |
876 | DhcpOptionsProcess(&bp->bp_vend[4]); | |
877 | BootpCopyNetParams(bp); /* Store net params from reply */ | |
878 | dhcp_state = BOUND; | |
879 | printf("DHCP client bound to address "); | |
880 | print_IPaddr(NetOurIP); | |
881 | printf("\n"); | |
882 | ||
883 | /* Obey the 'autoload' setting */ | |
884 | if (((s = getenv("autoload")) != NULL) && (*s == 'n')) { | |
885 | NetState = NETLOOP_SUCCESS; | |
886 | return; | |
887 | } | |
73a8b27c | 888 | TftpStart(); |
3861aa5c WD |
889 | return; |
890 | } | |
891 | break; | |
892 | default: | |
893 | printf("DHCP: INVALID STATE\n"); | |
894 | break; | |
895 | } | |
896 | ||
897 | } | |
898 | ||
899 | void DhcpRequest(void) | |
900 | { | |
901 | BootpRequest(); | |
902 | } | |
903 | #endif /* CFG_CMD_DHCP */ | |
904 | ||
905 | #endif /* CFG_CMD_NET */ |