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