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