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2d966958 WD |
1 | /* |
2 | * Copied from Linux Monitor (LiMon) - Networking. | |
3 | * | |
4 | * Copyright 1994 - 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 | /* | |
12 | * General Desription: | |
13 | * | |
14 | * The user interface supports commands for BOOTP, RARP, and TFTP. | |
15 | * Also, we support ARP internally. Depending on available data, | |
16 | * these interact as follows: | |
17 | * | |
18 | * BOOTP: | |
19 | * | |
20 | * Prerequisites: - own ethernet address | |
21 | * We want: - own IP address | |
22 | * - TFTP server IP address | |
23 | * - name of bootfile | |
24 | * Next step: ARP | |
25 | * | |
26 | * RARP: | |
27 | * | |
28 | * Prerequisites: - own ethernet address | |
29 | * We want: - own IP address | |
30 | * - TFTP server IP address | |
31 | * Next step: ARP | |
32 | * | |
33 | * ARP: | |
34 | * | |
35 | * Prerequisites: - own ethernet address | |
36 | * - own IP address | |
37 | * - TFTP server IP address | |
38 | * We want: - TFTP server ethernet address | |
39 | * Next step: TFTP | |
40 | * | |
41 | * DHCP: | |
42 | * | |
43 | * Prerequisites: - own ethernet address | |
44 | * We want: - IP, Netmask, ServerIP, Gateway IP | |
45 | * - bootfilename, lease time | |
46 | * Next step: - TFTP | |
47 | * | |
48 | * TFTP: | |
49 | * | |
50 | * Prerequisites: - own ethernet address | |
51 | * - own IP address | |
52 | * - TFTP server IP address | |
53 | * - TFTP server ethernet address | |
54 | * - name of bootfile (if unknown, we use a default name | |
55 | * derived from our own IP address) | |
56 | * We want: - load the boot file | |
57 | * Next step: none | |
cbd8a35c WD |
58 | * |
59 | * NFS: | |
60 | * | |
61 | * Prerequisites: - own ethernet address | |
62 | * - own IP address | |
63 | * - name of bootfile (if unknown, we use a default name | |
64 | * derived from our own IP address) | |
65 | * We want: - load the boot file | |
66 | * Next step: none | |
2d966958 WD |
67 | */ |
68 | ||
69 | ||
70 | #include <common.h> | |
71 | #include <watchdog.h> | |
72 | #include <command.h> | |
73 | #include <net.h> | |
74 | #include "bootp.h" | |
75 | #include "tftp.h" | |
76 | #include "rarp.h" | |
cbd8a35c | 77 | #include "nfs.h" |
fc3e2165 WD |
78 | #ifdef CONFIG_STATUS_LED |
79 | #include <status_led.h> | |
80 | #include <miiphy.h> | |
81 | #endif | |
2d966958 WD |
82 | |
83 | #if (CONFIG_COMMANDS & CFG_CMD_NET) | |
84 | ||
73a8b27c WD |
85 | #define ARP_TIMEOUT 5 /* Seconds before trying ARP again */ |
86 | #ifndef CONFIG_NET_RETRY_COUNT | |
87 | # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */ | |
88 | #else | |
89 | # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT) | |
90 | #endif | |
91 | ||
2d966958 WD |
92 | #if 0 |
93 | #define ET_DEBUG | |
94 | #endif | |
95 | ||
96 | /** BOOTP EXTENTIONS **/ | |
97 | ||
98 | IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ | |
99 | IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ | |
100 | IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ | |
fe389a82 SR |
101 | #if (CONFIG_BOOTP_MASK & CONFIG_BOOTP_DNS2) |
102 | IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */ | |
103 | #endif | |
2d966958 WD |
104 | char NetOurNISDomain[32]={0,}; /* Our NIS domain */ |
105 | char NetOurHostName[32]={0,}; /* Our hostname */ | |
106 | char NetOurRootPath[64]={0,}; /* Our bootpath */ | |
107 | ushort NetBootFileSize=0; /* Our bootfile size in blocks */ | |
108 | ||
109 | /** END OF BOOTP EXTENTIONS **/ | |
110 | ||
111 | ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ | |
112 | uchar NetOurEther[6]; /* Our ethernet address */ | |
113 | uchar NetServerEther[6] = /* Boot server enet address */ | |
73a8b27c | 114 | { 0, 0, 0, 0, 0, 0 }; |
2d966958 WD |
115 | IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ |
116 | IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */ | |
117 | volatile uchar *NetRxPkt; /* Current receive packet */ | |
118 | int NetRxPktLen; /* Current rx packet length */ | |
119 | unsigned NetIPID; /* IP packet ID */ | |
120 | uchar NetBcastAddr[6] = /* Ethernet bcast address */ | |
121 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
73a8b27c WD |
122 | uchar NetEtherNullAddr[6] = |
123 | { 0, 0, 0, 0, 0, 0 }; | |
2d966958 WD |
124 | int NetState; /* Network loop state */ |
125 | #ifdef CONFIG_NET_MULTI | |
126 | int NetRestartWrap = 0; /* Tried all network devices */ | |
127 | static int NetRestarted = 0; /* Network loop restarted */ | |
128 | static int NetDevExists = 0; /* At least one device configured */ | |
129 | #endif | |
130 | ||
131 | char BootFile[128]; /* Boot File name */ | |
132 | ||
73a8b27c WD |
133 | #if (CONFIG_COMMANDS & CFG_CMD_PING) |
134 | IPaddr_t NetPingIP; /* the ip address to ping */ | |
135 | ||
136 | static void PingStart(void); | |
137 | #endif | |
138 | ||
2d966958 WD |
139 | volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; |
140 | ||
141 | volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ | |
142 | ||
143 | static rxhand_f *packetHandler; /* Current RX packet handler */ | |
144 | static thand_f *timeHandler; /* Current timeout handler */ | |
e0ac62d7 WD |
145 | static ulong timeStart; /* Time base value */ |
146 | static ulong timeDelta; /* Current timeout value */ | |
2d966958 WD |
147 | volatile uchar *NetTxPacket = 0; /* THE transmit packet */ |
148 | ||
149 | static int net_check_prereq (proto_t protocol); | |
150 | ||
73a8b27c WD |
151 | /**********************************************************************/ |
152 | ||
153 | IPaddr_t NetArpWaitPacketIP; | |
154 | IPaddr_t NetArpWaitReplyIP; | |
155 | uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */ | |
156 | uchar *NetArpWaitTxPacket; /* THE transmit packet */ | |
157 | int NetArpWaitTxPacketSize; | |
158 | uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN]; | |
159 | ulong NetArpWaitTimerStart; | |
160 | int NetArpWaitTry; | |
161 | ||
162 | void ArpRequest(void) | |
163 | { | |
164 | int i; | |
165 | volatile uchar *pkt; | |
166 | ARP_t * arp; | |
167 | ||
168 | #ifdef ET_DEBUG | |
169 | printf("ARP broadcast %d\n", NetArpWaitTry); | |
170 | #endif | |
171 | pkt = NetTxPacket; | |
172 | ||
173 | NetSetEther(pkt, NetBcastAddr, PROT_ARP); | |
174 | pkt += ETHER_HDR_SIZE; | |
175 | ||
176 | arp = (ARP_t *)pkt; | |
177 | ||
178 | arp->ar_hrd = htons(ARP_ETHER); | |
179 | arp->ar_pro = htons(PROT_IP); | |
180 | arp->ar_hln = 6; | |
181 | arp->ar_pln = 4; | |
182 | arp->ar_op = htons(ARPOP_REQUEST); | |
183 | ||
184 | memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */ | |
185 | NetWriteIP((uchar*)&arp->ar_data[6], NetOurIP); /* source IP addr */ | |
186 | for (i=10; i<16; ++i) { | |
187 | arp->ar_data[i] = 0; /* dest ET addr = 0 */ | |
188 | } | |
189 | ||
190 | if((NetArpWaitPacketIP & NetOurSubnetMask) != (NetOurIP & NetOurSubnetMask)) { | |
191 | if (NetOurGatewayIP == 0) { | |
192 | puts ("## Warning: gatewayip needed but not set\n"); | |
193 | } | |
194 | NetArpWaitReplyIP = NetOurGatewayIP; | |
195 | } else | |
8bde7f77 | 196 | NetArpWaitReplyIP = NetArpWaitPacketIP; |
73a8b27c | 197 | |
8bde7f77 | 198 | NetWriteIP((uchar*)&arp->ar_data[16], NetArpWaitReplyIP); |
73a8b27c WD |
199 | (void) eth_send(NetTxPacket, ETHER_HDR_SIZE + ARP_HDR_SIZE); |
200 | } | |
201 | ||
202 | void ArpTimeoutCheck(void) | |
203 | { | |
204 | ulong t; | |
205 | ||
206 | if (!NetArpWaitPacketIP) | |
207 | return; | |
208 | ||
209 | t = get_timer(0); | |
210 | ||
211 | /* check for arp timeout */ | |
212 | if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) { | |
213 | NetArpWaitTry++; | |
214 | ||
215 | if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) { | |
216 | puts ("\nARP Retry count exceeded; starting again\n"); | |
217 | NetArpWaitTry = 0; | |
218 | NetStartAgain(); | |
219 | } else { | |
220 | NetArpWaitTimerStart = t; | |
221 | ArpRequest(); | |
222 | } | |
223 | } | |
224 | } | |
225 | ||
2d966958 WD |
226 | /**********************************************************************/ |
227 | /* | |
228 | * Main network processing loop. | |
229 | */ | |
230 | ||
231 | int | |
232 | NetLoop(proto_t protocol) | |
233 | { | |
234 | DECLARE_GLOBAL_DATA_PTR; | |
235 | ||
236 | bd_t *bd = gd->bd; | |
237 | ||
238 | #ifdef CONFIG_NET_MULTI | |
239 | NetRestarted = 0; | |
240 | NetDevExists = 0; | |
241 | #endif | |
242 | ||
73a8b27c WD |
243 | /* XXX problem with bss workaround */ |
244 | NetArpWaitPacketMAC = NULL; | |
245 | NetArpWaitTxPacket = NULL; | |
246 | NetArpWaitPacketIP = 0; | |
247 | NetArpWaitReplyIP = 0; | |
248 | NetArpWaitTxPacket = NULL; | |
249 | NetTxPacket = NULL; | |
250 | ||
2d966958 WD |
251 | if (!NetTxPacket) { |
252 | int i; | |
253 | ||
254 | /* | |
255 | * Setup packet buffers, aligned correctly. | |
256 | */ | |
257 | NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); | |
258 | NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; | |
259 | for (i = 0; i < PKTBUFSRX; i++) { | |
260 | NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; | |
261 | } | |
73a8b27c WD |
262 | |
263 | } | |
264 | ||
265 | if (!NetArpWaitTxPacket) { | |
266 | NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1); | |
267 | NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN; | |
268 | NetArpWaitTxPacketSize = 0; | |
2d966958 WD |
269 | } |
270 | ||
271 | eth_halt(); | |
0b97ab14 WD |
272 | if(eth_init(bd) < 0) |
273 | return(-1); | |
2d966958 WD |
274 | |
275 | restart: | |
276 | #ifdef CONFIG_NET_MULTI | |
277 | memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); | |
278 | #else | |
279 | memcpy (NetOurEther, bd->bi_enetaddr, 6); | |
280 | #endif | |
281 | ||
282 | NetState = NETLOOP_CONTINUE; | |
283 | ||
284 | /* | |
285 | * Start the ball rolling with the given start function. From | |
286 | * here on, this code is a state machine driven by received | |
287 | * packets and timer events. | |
288 | */ | |
289 | ||
290 | switch (protocol) { | |
cbd8a35c WD |
291 | #if (CONFIG_COMMANDS & CFG_CMD_NFS) |
292 | case NFS: | |
293 | #endif | |
73a8b27c WD |
294 | #if (CONFIG_COMMANDS & CFG_CMD_PING) |
295 | case PING: | |
296 | #endif | |
2d966958 WD |
297 | case TFTP: |
298 | NetCopyIP(&NetOurIP, &bd->bi_ip_addr); | |
2d966958 WD |
299 | NetOurGatewayIP = getenv_IPaddr ("gatewayip"); |
300 | NetOurSubnetMask= getenv_IPaddr ("netmask"); | |
73a8b27c WD |
301 | |
302 | switch (protocol) { | |
cbd8a35c WD |
303 | #if (CONFIG_COMMANDS & CFG_CMD_NFS) |
304 | case NFS: | |
305 | #endif | |
73a8b27c WD |
306 | case TFTP: |
307 | NetServerIP = getenv_IPaddr ("serverip"); | |
308 | break; | |
309 | #if (CONFIG_COMMANDS & CFG_CMD_PING) | |
310 | case PING: | |
311 | /* nothing */ | |
312 | break; | |
313 | #endif | |
314 | default: | |
315 | break; | |
316 | } | |
317 | ||
2d966958 WD |
318 | break; |
319 | case BOOTP: | |
320 | case RARP: | |
321 | /* | |
8bde7f77 WD |
322 | * initialize our IP addr to 0 in order to accept ANY |
323 | * IP addr assigned to us by the BOOTP / RARP server | |
2d966958 WD |
324 | */ |
325 | NetOurIP = 0; | |
3d3befa7 | 326 | NetServerIP = getenv_IPaddr ("serverip"); |
2d966958 WD |
327 | break; |
328 | default: | |
329 | break; | |
330 | } | |
331 | ||
332 | switch (net_check_prereq (protocol)) { | |
333 | case 1: | |
334 | /* network not configured */ | |
1d0350ed | 335 | return (-1); |
2d966958 WD |
336 | |
337 | #ifdef CONFIG_NET_MULTI | |
338 | case 2: | |
339 | /* network device not configured */ | |
340 | break; | |
341 | #endif /* CONFIG_NET_MULTI */ | |
342 | ||
343 | case 0: | |
344 | #ifdef CONFIG_NET_MULTI | |
345 | NetDevExists = 1; | |
346 | #endif | |
347 | switch (protocol) { | |
348 | case TFTP: | |
349 | /* always use ARP to get server ethernet address */ | |
73a8b27c | 350 | TftpStart(); |
2d966958 WD |
351 | break; |
352 | ||
353 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
354 | case DHCP: | |
355 | /* Start with a clean slate... */ | |
356 | NetOurIP = 0; | |
3d3befa7 | 357 | NetServerIP = getenv_IPaddr ("serverip"); |
2d966958 WD |
358 | DhcpRequest(); /* Basically same as BOOTP */ |
359 | break; | |
360 | #endif /* CFG_CMD_DHCP */ | |
361 | ||
362 | case BOOTP: | |
363 | BootpTry = 0; | |
364 | BootpRequest (); | |
365 | break; | |
366 | ||
367 | case RARP: | |
368 | RarpTry = 0; | |
369 | RarpRequest (); | |
370 | break; | |
73a8b27c WD |
371 | #if (CONFIG_COMMANDS & CFG_CMD_PING) |
372 | case PING: | |
373 | PingStart(); | |
374 | break; | |
cbd8a35c WD |
375 | #endif |
376 | #if (CONFIG_COMMANDS & CFG_CMD_NFS) | |
377 | case NFS: | |
378 | NfsStart(); | |
379 | break; | |
73a8b27c | 380 | #endif |
2d966958 WD |
381 | default: |
382 | break; | |
383 | } | |
384 | ||
385 | NetBootFileXferSize = 0; | |
386 | break; | |
387 | } | |
388 | ||
fc3e2165 WD |
389 | #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) |
390 | #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) | |
391 | /* | |
42d1f039 | 392 | * Echo the inverted link state to the fault LED. |
fc3e2165 WD |
393 | */ |
394 | if(miiphy_link(CFG_FAULT_MII_ADDR)) { | |
395 | status_led_set (STATUS_LED_RED, STATUS_LED_OFF); | |
396 | } else { | |
397 | status_led_set (STATUS_LED_RED, STATUS_LED_ON); | |
398 | } | |
399 | #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ | |
400 | #endif /* CONFIG_MII, ... */ | |
2d966958 WD |
401 | |
402 | /* | |
403 | * Main packet reception loop. Loop receiving packets until | |
404 | * someone sets `NetQuit'. | |
405 | */ | |
406 | for (;;) { | |
407 | WATCHDOG_RESET(); | |
408 | #ifdef CONFIG_SHOW_ACTIVITY | |
409 | { | |
410 | extern void show_activity(int arg); | |
411 | show_activity(1); | |
412 | } | |
413 | #endif | |
414 | /* | |
415 | * Check the ethernet for a new packet. The ethernet | |
416 | * receive routine will process it. | |
417 | */ | |
418 | eth_rx(); | |
419 | ||
420 | /* | |
421 | * Abort if ctrl-c was pressed. | |
422 | */ | |
423 | if (ctrlc()) { | |
8bde7f77 | 424 | eth_halt(); |
4b9206ed | 425 | puts ("\nAbort\n"); |
1d0350ed | 426 | return (-1); |
2d966958 WD |
427 | } |
428 | ||
73a8b27c | 429 | ArpTimeoutCheck(); |
2d966958 WD |
430 | |
431 | /* | |
432 | * Check for a timeout, and run the timeout handler | |
433 | * if we have one. | |
434 | */ | |
e0ac62d7 | 435 | if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { |
2d966958 WD |
436 | thand_f *x; |
437 | ||
fc3e2165 WD |
438 | #if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII) |
439 | #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED) | |
440 | /* | |
42d1f039 | 441 | * Echo the inverted link state to the fault LED. |
fc3e2165 WD |
442 | */ |
443 | if(miiphy_link(CFG_FAULT_MII_ADDR)) { | |
444 | status_led_set (STATUS_LED_RED, STATUS_LED_OFF); | |
445 | } else { | |
446 | status_led_set (STATUS_LED_RED, STATUS_LED_ON); | |
447 | } | |
448 | #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */ | |
449 | #endif /* CONFIG_MII, ... */ | |
2d966958 WD |
450 | x = timeHandler; |
451 | timeHandler = (thand_f *)0; | |
452 | (*x)(); | |
453 | } | |
454 | ||
455 | ||
456 | switch (NetState) { | |
457 | ||
458 | case NETLOOP_RESTART: | |
459 | #ifdef CONFIG_NET_MULTI | |
460 | NetRestarted = 1; | |
461 | #endif | |
462 | goto restart; | |
463 | ||
464 | case NETLOOP_SUCCESS: | |
465 | if (NetBootFileXferSize > 0) { | |
466 | char buf[10]; | |
467 | printf("Bytes transferred = %ld (%lx hex)\n", | |
468 | NetBootFileXferSize, | |
469 | NetBootFileXferSize); | |
470 | sprintf(buf, "%lx", NetBootFileXferSize); | |
471 | setenv("filesize", buf); | |
472 | } | |
473 | eth_halt(); | |
474 | return NetBootFileXferSize; | |
475 | ||
476 | case NETLOOP_FAIL: | |
1d0350ed | 477 | return (-1); |
2d966958 WD |
478 | } |
479 | } | |
480 | } | |
481 | ||
482 | /**********************************************************************/ | |
483 | ||
484 | static void | |
485 | startAgainTimeout(void) | |
486 | { | |
487 | NetState = NETLOOP_RESTART; | |
488 | } | |
489 | ||
490 | static void | |
491 | startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
492 | { | |
493 | /* Totally ignore the packet */ | |
494 | } | |
495 | ||
496 | void | |
497 | NetStartAgain(void) | |
498 | { | |
499 | #ifndef CONFIG_NET_MULTI | |
500 | NetSetTimeout(10 * CFG_HZ, startAgainTimeout); | |
501 | NetSetHandler(startAgainHandler); | |
502 | #else | |
503 | DECLARE_GLOBAL_DATA_PTR; | |
504 | ||
505 | eth_halt(); | |
506 | eth_try_another(!NetRestarted); | |
507 | eth_init(gd->bd); | |
508 | if (NetRestartWrap) | |
509 | { | |
510 | NetRestartWrap = 0; | |
511 | if (NetDevExists) | |
512 | { | |
513 | NetSetTimeout(10 * CFG_HZ, startAgainTimeout); | |
514 | NetSetHandler(startAgainHandler); | |
515 | } | |
516 | else | |
517 | { | |
518 | NetState = NETLOOP_FAIL; | |
519 | } | |
520 | } | |
521 | else | |
522 | { | |
523 | NetState = NETLOOP_RESTART; | |
524 | } | |
525 | #endif | |
526 | } | |
527 | ||
528 | /**********************************************************************/ | |
529 | /* | |
530 | * Miscelaneous bits. | |
531 | */ | |
532 | ||
533 | void | |
534 | NetSetHandler(rxhand_f * f) | |
535 | { | |
536 | packetHandler = f; | |
537 | } | |
538 | ||
539 | ||
540 | void | |
541 | NetSetTimeout(int iv, thand_f * f) | |
542 | { | |
543 | if (iv == 0) { | |
544 | timeHandler = (thand_f *)0; | |
545 | } else { | |
546 | timeHandler = f; | |
e0ac62d7 WD |
547 | timeStart = get_timer(0); |
548 | timeDelta = iv; | |
2d966958 WD |
549 | } |
550 | } | |
551 | ||
552 | ||
553 | void | |
554 | NetSendPacket(volatile uchar * pkt, int len) | |
555 | { | |
556 | (void) eth_send(pkt, len); | |
557 | } | |
558 | ||
73a8b27c WD |
559 | int |
560 | NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len) | |
561 | { | |
562 | /* convert to new style broadcast */ | |
563 | if (dest == 0) | |
564 | dest = 0xFFFFFFFF; | |
565 | ||
566 | /* if broadcast, make the ether address a broadcast and don't do ARP */ | |
567 | if (dest == 0xFFFFFFFF) | |
568 | ether = NetBcastAddr; | |
569 | ||
570 | /* if MAC address was not discovered yet, save the packet and do an ARP request */ | |
571 | if (memcmp(ether, NetEtherNullAddr, 6) == 0) { | |
572 | ||
573 | #ifdef ET_DEBUG | |
574 | printf("sending ARP for %08lx\n", dest); | |
575 | #endif | |
576 | ||
577 | NetArpWaitPacketIP = dest; | |
578 | NetArpWaitPacketMAC = ether; | |
579 | NetSetEther (NetArpWaitTxPacket, NetArpWaitPacketMAC, PROT_IP); | |
580 | NetSetIP (NetArpWaitTxPacket + ETHER_HDR_SIZE, dest, dport, sport, len); | |
581 | memcpy(NetArpWaitTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE, | |
582 | (uchar *)NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE, len); | |
583 | ||
584 | /* size of the waiting packet */ | |
585 | NetArpWaitTxPacketSize = ETHER_HDR_SIZE + IP_HDR_SIZE + len; | |
586 | ||
587 | /* and do the ARP request */ | |
588 | NetArpWaitTry = 1; | |
589 | NetArpWaitTimerStart = get_timer(0); | |
590 | ArpRequest(); | |
591 | return 1; /* waiting */ | |
592 | } | |
593 | ||
594 | #ifdef ET_DEBUG | |
595 | printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n", | |
596 | dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]); | |
597 | #endif | |
598 | ||
599 | NetSetEther (NetTxPacket, ether, PROT_IP); | |
600 | NetSetIP (NetTxPacket + ETHER_HDR_SIZE, dest, dport, sport, len); | |
601 | (void) eth_send(NetTxPacket, ETHER_HDR_SIZE + IP_HDR_SIZE + len); | |
602 | ||
603 | return 0; /* transmited */ | |
604 | } | |
605 | ||
606 | #if (CONFIG_COMMANDS & CFG_CMD_PING) | |
607 | static ushort PingSeqNo; | |
608 | ||
609 | int PingSend(void) | |
610 | { | |
611 | static uchar mac[6]; | |
612 | volatile IP_t *ip; | |
613 | volatile ushort *s; | |
614 | ||
615 | /* XXX always send arp request */ | |
616 | ||
617 | memcpy(mac, NetEtherNullAddr, 6); | |
618 | ||
619 | #ifdef ET_DEBUG | |
620 | printf("sending ARP for %08lx\n", NetPingIP); | |
621 | #endif | |
622 | ||
623 | NetArpWaitPacketIP = NetPingIP; | |
624 | NetArpWaitPacketMAC = mac; | |
625 | ||
626 | NetSetEther(NetArpWaitTxPacket, mac, PROT_IP); | |
627 | ||
628 | ip = (volatile IP_t *)(NetArpWaitTxPacket + ETHER_HDR_SIZE); | |
629 | ||
630 | /* | |
631 | * Construct an IP and ICMP header. (need to set no fragment bit - XXX) | |
632 | */ | |
633 | ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ | |
634 | ip->ip_tos = 0; | |
635 | ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8); | |
636 | ip->ip_id = htons(NetIPID++); | |
637 | ip->ip_off = htons(0x4000); /* No fragmentation */ | |
638 | ip->ip_ttl = 255; | |
639 | ip->ip_p = 0x01; /* ICMP */ | |
640 | ip->ip_sum = 0; | |
641 | NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ | |
642 | NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */ | |
643 | ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); | |
644 | ||
645 | s = &ip->udp_src; /* XXX ICMP starts here */ | |
646 | s[0] = htons(0x0800); /* echo-request, code */ | |
647 | s[1] = 0; /* checksum */ | |
648 | s[2] = 0; /* identifier */ | |
649 | s[3] = htons(PingSeqNo++); /* sequence number */ | |
650 | s[1] = ~NetCksum((uchar *)s, 8/2); | |
651 | ||
652 | /* size of the waiting packet */ | |
653 | NetArpWaitTxPacketSize = ETHER_HDR_SIZE + IP_HDR_SIZE_NO_UDP + 8; | |
654 | ||
655 | /* and do the ARP request */ | |
656 | NetArpWaitTry = 1; | |
657 | NetArpWaitTimerStart = get_timer(0); | |
658 | ArpRequest(); | |
659 | return 1; /* waiting */ | |
660 | } | |
661 | ||
662 | static void | |
663 | PingTimeout (void) | |
664 | { | |
665 | eth_halt(); | |
666 | NetState = NETLOOP_FAIL; /* we did not get the reply */ | |
667 | } | |
2d966958 | 668 | |
73a8b27c WD |
669 | static void |
670 | PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
671 | { | |
672 | IPaddr_t tmp; | |
673 | volatile IP_t *ip = (volatile IP_t *)pkt; | |
674 | ||
675 | tmp = NetReadIP((void *)&ip->ip_src); | |
676 | if (tmp != NetPingIP) | |
677 | return; | |
678 | ||
679 | NetState = NETLOOP_SUCCESS; | |
680 | } | |
681 | ||
682 | static void PingStart(void) | |
683 | { | |
684 | NetSetTimeout (10 * CFG_HZ, PingTimeout); | |
685 | NetSetHandler (PingHandler); | |
686 | ||
687 | PingSend(); | |
688 | } | |
689 | ||
690 | #endif | |
2d966958 WD |
691 | |
692 | void | |
693 | NetReceive(volatile uchar * pkt, int len) | |
694 | { | |
695 | Ethernet_t *et; | |
696 | IP_t *ip; | |
697 | ARP_t *arp; | |
698 | IPaddr_t tmp; | |
699 | int x; | |
700 | ||
2d966958 WD |
701 | NetRxPkt = pkt; |
702 | NetRxPktLen = len; | |
703 | et = (Ethernet_t *)pkt; | |
704 | ||
705 | x = ntohs(et->et_protlen); | |
706 | ||
707 | if (x < 1514) { | |
708 | /* | |
709 | * Got a 802 packet. Check the other protocol field. | |
710 | */ | |
711 | x = ntohs(et->et_prot); | |
712 | ip = (IP_t *)(pkt + E802_HDR_SIZE); | |
713 | len -= E802_HDR_SIZE; | |
714 | } else { | |
715 | ip = (IP_t *)(pkt + ETHER_HDR_SIZE); | |
716 | len -= ETHER_HDR_SIZE; | |
717 | } | |
718 | ||
719 | #ifdef ET_DEBUG | |
720 | printf("Receive from protocol 0x%x\n", x); | |
721 | #endif | |
722 | ||
723 | switch (x) { | |
724 | ||
725 | case PROT_ARP: | |
726 | /* | |
727 | * We have to deal with two types of ARP packets: | |
8bde7f77 WD |
728 | * - REQUEST packets will be answered by sending our |
729 | * IP address - if we know it. | |
730 | * - REPLY packates are expected only after we asked | |
731 | * for the TFTP server's or the gateway's ethernet | |
732 | * address; so if we receive such a packet, we set | |
733 | * the server ethernet address | |
2d966958 WD |
734 | */ |
735 | #ifdef ET_DEBUG | |
4b9206ed | 736 | puts ("Got ARP\n"); |
2d966958 WD |
737 | #endif |
738 | arp = (ARP_t *)ip; | |
739 | if (len < ARP_HDR_SIZE) { | |
740 | printf("bad length %d < %d\n", len, ARP_HDR_SIZE); | |
741 | return; | |
742 | } | |
743 | if (ntohs(arp->ar_hrd) != ARP_ETHER) { | |
744 | return; | |
745 | } | |
746 | if (ntohs(arp->ar_pro) != PROT_IP) { | |
747 | return; | |
748 | } | |
749 | if (arp->ar_hln != 6) { | |
750 | return; | |
751 | } | |
752 | if (arp->ar_pln != 4) { | |
753 | return; | |
754 | } | |
755 | ||
756 | if (NetOurIP == 0) { | |
757 | return; | |
758 | } | |
759 | ||
760 | if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { | |
761 | return; | |
762 | } | |
763 | ||
764 | switch (ntohs(arp->ar_op)) { | |
765 | case ARPOP_REQUEST: /* reply with our IP address */ | |
766 | #ifdef ET_DEBUG | |
4b9206ed | 767 | puts ("Got ARP REQUEST, return our IP\n"); |
2d966958 WD |
768 | #endif |
769 | NetSetEther((uchar *)et, et->et_src, PROT_ARP); | |
770 | arp->ar_op = htons(ARPOP_REPLY); | |
771 | memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); | |
772 | NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); | |
773 | memcpy (&arp->ar_data[ 0], NetOurEther, 6); | |
774 | NetCopyIP(&arp->ar_data[ 6], &NetOurIP); | |
73a8b27c | 775 | (void) eth_send((uchar *)et, ((uchar *)arp-pkt) + ARP_HDR_SIZE); |
2d966958 | 776 | return; |
73a8b27c WD |
777 | |
778 | case ARPOP_REPLY: /* arp reply */ | |
779 | /* are we waiting for a reply */ | |
780 | if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC) | |
781 | break; | |
2d966958 | 782 | #ifdef ET_DEBUG |
73a8b27c WD |
783 | printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n", |
784 | arp->ar_data[0], arp->ar_data[1], | |
785 | arp->ar_data[2], arp->ar_data[3], | |
786 | arp->ar_data[4], arp->ar_data[5]); | |
2d966958 | 787 | #endif |
73a8b27c WD |
788 | |
789 | tmp = NetReadIP(&arp->ar_data[6]); | |
790 | ||
791 | /* matched waiting packet's address */ | |
792 | if (tmp == NetArpWaitReplyIP) { | |
793 | #ifdef ET_DEBUG | |
4b9206ed | 794 | puts ("Got it\n"); |
73a8b27c WD |
795 | #endif |
796 | /* save address for later use */ | |
797 | memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6); | |
798 | ||
799 | /* modify header, and transmit it */ | |
800 | memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6); | |
801 | (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize); | |
802 | ||
803 | /* no arp request pending now */ | |
804 | NetArpWaitPacketIP = 0; | |
805 | NetArpWaitTxPacketSize = 0; | |
806 | NetArpWaitPacketMAC = NULL; | |
807 | ||
808 | } | |
2d966958 WD |
809 | return; |
810 | default: | |
811 | #ifdef ET_DEBUG | |
812 | printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); | |
813 | #endif | |
814 | return; | |
815 | } | |
816 | ||
817 | case PROT_RARP: | |
818 | #ifdef ET_DEBUG | |
4b9206ed | 819 | puts ("Got RARP\n"); |
2d966958 WD |
820 | #endif |
821 | arp = (ARP_t *)ip; | |
822 | if (len < ARP_HDR_SIZE) { | |
823 | printf("bad length %d < %d\n", len, ARP_HDR_SIZE); | |
824 | return; | |
825 | } | |
826 | ||
827 | if ((ntohs(arp->ar_op) != RARPOP_REPLY) || | |
828 | (ntohs(arp->ar_hrd) != ARP_ETHER) || | |
829 | (ntohs(arp->ar_pro) != PROT_IP) || | |
830 | (arp->ar_hln != 6) || (arp->ar_pln != 4)) { | |
831 | ||
4b9206ed | 832 | puts ("invalid RARP header\n"); |
2d966958 WD |
833 | } else { |
834 | NetCopyIP(&NetOurIP, &arp->ar_data[16]); | |
3d3befa7 WD |
835 | if (NetServerIP == 0) |
836 | NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); | |
2d966958 WD |
837 | memcpy (NetServerEther, &arp->ar_data[ 0], 6); |
838 | ||
839 | (*packetHandler)(0,0,0,0); | |
840 | } | |
841 | break; | |
842 | ||
843 | case PROT_IP: | |
844 | #ifdef ET_DEBUG | |
4b9206ed | 845 | puts ("Got IP\n"); |
2d966958 WD |
846 | #endif |
847 | if (len < IP_HDR_SIZE) { | |
848 | debug ("len bad %d < %d\n", len, IP_HDR_SIZE); | |
849 | return; | |
850 | } | |
851 | if (len < ntohs(ip->ip_len)) { | |
852 | printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); | |
853 | return; | |
854 | } | |
855 | len = ntohs(ip->ip_len); | |
856 | #ifdef ET_DEBUG | |
857 | printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); | |
858 | #endif | |
859 | if ((ip->ip_hl_v & 0xf0) != 0x40) { | |
860 | return; | |
861 | } | |
862 | if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ | |
863 | return; | |
864 | } | |
865 | if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { | |
4b9206ed | 866 | puts ("checksum bad\n"); |
2d966958 WD |
867 | return; |
868 | } | |
869 | tmp = NetReadIP(&ip->ip_dst); | |
870 | if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { | |
871 | return; | |
872 | } | |
873 | /* | |
874 | * watch for ICMP host redirects | |
875 | * | |
8bde7f77 WD |
876 | * There is no real handler code (yet). We just watch |
877 | * for ICMP host redirect messages. In case anybody | |
878 | * sees these messages: please contact me | |
879 | * (wd@denx.de), or - even better - send me the | |
880 | * necessary fixes :-) | |
2d966958 | 881 | * |
8bde7f77 WD |
882 | * Note: in all cases where I have seen this so far |
883 | * it was a problem with the router configuration, | |
884 | * for instance when a router was configured in the | |
885 | * BOOTP reply, but the TFTP server was on the same | |
886 | * subnet. So this is probably a warning that your | |
887 | * configuration might be wrong. But I'm not really | |
888 | * sure if there aren't any other situations. | |
2d966958 WD |
889 | */ |
890 | if (ip->ip_p == IPPROTO_ICMP) { | |
891 | ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); | |
892 | ||
73a8b27c WD |
893 | switch (icmph->type) { |
894 | case ICMP_REDIRECT: | |
2d966958 WD |
895 | if (icmph->code != ICMP_REDIR_HOST) |
896 | return; | |
897 | puts (" ICMP Host Redirect to "); | |
898 | print_IPaddr(icmph->un.gateway); | |
899 | putc(' '); | |
73a8b27c WD |
900 | break; |
901 | #if (CONFIG_COMMANDS & CFG_CMD_PING) | |
902 | case ICMP_ECHO_REPLY: | |
903 | /* | |
904 | * IP header OK. Pass the packet to the current handler. | |
905 | */ | |
906 | /* XXX point to ip packet */ | |
907 | (*packetHandler)((uchar *)ip, 0, 0, 0); | |
908 | break; | |
909 | #endif | |
910 | default: | |
911 | return; | |
912 | } | |
2d966958 WD |
913 | } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ |
914 | return; | |
915 | } | |
916 | ||
917 | /* | |
918 | * IP header OK. Pass the packet to the current handler. | |
919 | */ | |
920 | (*packetHandler)((uchar *)ip +IP_HDR_SIZE, | |
921 | ntohs(ip->udp_dst), | |
922 | ntohs(ip->udp_src), | |
923 | ntohs(ip->udp_len) - 8); | |
924 | ||
925 | break; | |
926 | } | |
927 | } | |
928 | ||
929 | ||
930 | /**********************************************************************/ | |
931 | ||
932 | static int net_check_prereq (proto_t protocol) | |
933 | { | |
934 | switch (protocol) { | |
73a8b27c WD |
935 | /* Fall through */ |
936 | #if (CONFIG_COMMANDS & CFG_CMD_PING) | |
937 | case PING: | |
938 | if (NetPingIP == 0) { | |
939 | puts ("*** ERROR: ping address not given\n"); | |
940 | return (1); | |
941 | } | |
942 | goto common; | |
cbd8a35c WD |
943 | #endif |
944 | #if (CONFIG_COMMANDS & CFG_CMD_NFS) | |
945 | case NFS: | |
73a8b27c | 946 | #endif |
2d966958 WD |
947 | case TFTP: |
948 | if (NetServerIP == 0) { | |
949 | puts ("*** ERROR: `serverip' not set\n"); | |
950 | return (1); | |
951 | } | |
952 | ||
73a8b27c WD |
953 | #if (CONFIG_COMMANDS & CFG_CMD_PING) |
954 | common: | |
955 | #endif | |
956 | ||
2d966958 WD |
957 | if (NetOurIP == 0) { |
958 | puts ("*** ERROR: `ipaddr' not set\n"); | |
959 | return (1); | |
960 | } | |
961 | /* Fall through */ | |
962 | ||
963 | case DHCP: | |
964 | case RARP: | |
965 | case BOOTP: | |
966 | if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { | |
967 | #ifdef CONFIG_NET_MULTI | |
968 | extern int eth_get_dev_index (void); | |
969 | int num = eth_get_dev_index(); | |
970 | ||
971 | switch (num) { | |
972 | case -1: | |
973 | puts ("*** ERROR: No ethernet found.\n"); | |
974 | return (1); | |
975 | case 0: | |
976 | puts ("*** ERROR: `ethaddr' not set\n"); | |
977 | break; | |
978 | default: | |
8bde7f77 | 979 | printf ("*** ERROR: `eth%daddr' not set\n", |
2d966958 WD |
980 | num); |
981 | break; | |
982 | } | |
983 | ||
984 | NetStartAgain (); | |
985 | return (2); | |
986 | #else | |
987 | puts ("*** ERROR: `ethaddr' not set\n"); | |
988 | return (1); | |
989 | #endif | |
990 | } | |
991 | /* Fall through */ | |
73a8b27c WD |
992 | default: |
993 | return(0); | |
2d966958 WD |
994 | } |
995 | return (0); /* OK */ | |
996 | } | |
997 | /**********************************************************************/ | |
998 | ||
999 | int | |
1000 | NetCksumOk(uchar * ptr, int len) | |
1001 | { | |
1002 | return !((NetCksum(ptr, len) + 1) & 0xfffe); | |
1003 | } | |
1004 | ||
1005 | ||
1006 | unsigned | |
1007 | NetCksum(uchar * ptr, int len) | |
1008 | { | |
1009 | ulong xsum; | |
1010 | ||
1011 | xsum = 0; | |
1012 | while (len-- > 0) | |
1013 | xsum += *((ushort *)ptr)++; | |
1014 | xsum = (xsum & 0xffff) + (xsum >> 16); | |
1015 | xsum = (xsum & 0xffff) + (xsum >> 16); | |
1016 | return (xsum & 0xffff); | |
1017 | } | |
1018 | ||
1019 | ||
1020 | void | |
1021 | NetSetEther(volatile uchar * xet, uchar * addr, uint prot) | |
1022 | { | |
1023 | Ethernet_t *et = (Ethernet_t *)xet; | |
1024 | ||
1025 | memcpy (et->et_dest, addr, 6); | |
1026 | memcpy (et->et_src, NetOurEther, 6); | |
1027 | et->et_protlen = htons(prot); | |
1028 | } | |
1029 | ||
1030 | ||
1031 | void | |
1032 | NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) | |
1033 | { | |
1034 | volatile IP_t *ip = (IP_t *)xip; | |
1035 | ||
1036 | /* | |
1037 | * If the data is an odd number of bytes, zero the | |
1038 | * byte after the last byte so that the checksum | |
1039 | * will work. | |
1040 | */ | |
1041 | if (len & 1) | |
1042 | xip[IP_HDR_SIZE + len] = 0; | |
1043 | ||
1044 | /* | |
1045 | * Construct an IP and UDP header. | |
1046 | (need to set no fragment bit - XXX) | |
1047 | */ | |
1048 | ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ | |
1049 | ip->ip_tos = 0; | |
1050 | ip->ip_len = htons(IP_HDR_SIZE + len); | |
1051 | ip->ip_id = htons(NetIPID++); | |
1052 | ip->ip_off = htons(0x4000); /* No fragmentation */ | |
1053 | ip->ip_ttl = 255; | |
1054 | ip->ip_p = 17; /* UDP */ | |
1055 | ip->ip_sum = 0; | |
1056 | NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ | |
1057 | NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ | |
1058 | ip->udp_src = htons(sport); | |
1059 | ip->udp_dst = htons(dport); | |
1060 | ip->udp_len = htons(8 + len); | |
1061 | ip->udp_xsum = 0; | |
1062 | ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); | |
1063 | } | |
1064 | ||
1065 | void copy_filename (uchar *dst, uchar *src, int size) | |
1066 | { | |
1067 | if (*src && (*src == '"')) { | |
1068 | ++src; | |
1069 | --size; | |
1070 | } | |
1071 | ||
1072 | while ((--size > 0) && *src && (*src != '"')) { | |
1073 | *dst++ = *src++; | |
1074 | } | |
1075 | *dst = '\0'; | |
1076 | } | |
1077 | ||
1078 | #endif /* CFG_CMD_NET */ | |
1079 | ||
1080 | void ip_to_string (IPaddr_t x, char *s) | |
1081 | { | |
1082 | x = ntohl(x); | |
1083 | sprintf (s,"%d.%d.%d.%d", | |
8bde7f77 | 1084 | (int)((x >> 24) & 0xff), |
2d966958 WD |
1085 | (int)((x >> 16) & 0xff), |
1086 | (int)((x >> 8) & 0xff), | |
1087 | (int)((x >> 0) & 0xff) | |
1088 | ); | |
1089 | } | |
1090 | ||
73a8b27c | 1091 | IPaddr_t string_to_ip(char *s) |
2d966958 WD |
1092 | { |
1093 | IPaddr_t addr; | |
73a8b27c | 1094 | char *e; |
2d966958 WD |
1095 | int i; |
1096 | ||
73a8b27c WD |
1097 | if (s == NULL) |
1098 | return(0); | |
2d966958 WD |
1099 | |
1100 | for (addr=0, i=0; i<4; ++i) { | |
1101 | ulong val = s ? simple_strtoul(s, &e, 10) : 0; | |
1102 | addr <<= 8; | |
1103 | addr |= (val & 0xFF); | |
1104 | if (s) { | |
1105 | s = (*e) ? e+1 : e; | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | return (htonl(addr)); | |
1110 | } | |
73a8b27c WD |
1111 | |
1112 | void print_IPaddr (IPaddr_t x) | |
1113 | { | |
1114 | char tmp[16]; | |
1115 | ||
1116 | ip_to_string(x, tmp); | |
1117 | ||
1118 | puts(tmp); | |
1119 | } | |
1120 | ||
1121 | IPaddr_t getenv_IPaddr (char *var) | |
1122 | { | |
1123 | return (string_to_ip(getenv(var))); | |
1124 | } |