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Merge git://www.denx.de/git/u-boot
[people/ms/u-boot.git] / net / net.c
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 * 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
67 *
68 * SNTP:
69 *
70 * Prerequisites: - own ethernet address
71 * - own IP address
72 * We want: - network time
73 * Next step: none
74 */
75
76
77 #include <common.h>
78 #include <watchdog.h>
79 #include <command.h>
80 #include <net.h>
81 #include "bootp.h"
82 #include "tftp.h"
83 #include "rarp.h"
84 #include "nfs.h"
85 #ifdef CONFIG_STATUS_LED
86 #include <status_led.h>
87 #include <miiphy.h>
88 #endif
89 #if defined(CONFIG_CMD_SNTP)
90 #include "sntp.h"
91 #endif
92
93 #if defined(CONFIG_CMD_NET)
94
95 DECLARE_GLOBAL_DATA_PTR;
96
97 #define ARP_TIMEOUT 5UL /* Seconds before trying ARP again */
98 #ifndef CONFIG_NET_RETRY_COUNT
99 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
100 #else
101 # define ARP_TIMEOUT_COUNT (CONFIG_NET_RETRY_COUNT)
102 #endif
103
104 #if 0
105 #define ET_DEBUG
106 #endif
107
108 /** BOOTP EXTENTIONS **/
109
110 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
111 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
112 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
113 #if defined(CONFIG_BOOTP_DNS2)
114 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
115 #endif
116 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
117 char NetOurHostName[32]={0,}; /* Our hostname */
118 char NetOurRootPath[64]={0,}; /* Our bootpath */
119 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
120
121 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
122 IPaddr_t Mcast_addr;
123 #endif
124
125 /** END OF BOOTP EXTENTIONS **/
126
127 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
128 uchar NetOurEther[6]; /* Our ethernet address */
129 uchar NetServerEther[6] = /* Boot server enet address */
130 { 0, 0, 0, 0, 0, 0 };
131 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
132 IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */
133 volatile uchar *NetRxPkt; /* Current receive packet */
134 int NetRxPktLen; /* Current rx packet length */
135 unsigned NetIPID; /* IP packet ID */
136 uchar NetBcastAddr[6] = /* Ethernet bcast address */
137 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
138 uchar NetEtherNullAddr[6] =
139 { 0, 0, 0, 0, 0, 0 };
140 #if defined(CONFIG_CMD_CDP)
141 uchar NetCDPAddr[6] = /* Ethernet bcast address */
142 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
143 #endif
144 int NetState; /* Network loop state */
145 #ifdef CONFIG_NET_MULTI
146 int NetRestartWrap = 0; /* Tried all network devices */
147 static int NetRestarted = 0; /* Network loop restarted */
148 static int NetDevExists = 0; /* At least one device configured */
149 #endif
150
151 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
152 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
153 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
154
155 char BootFile[128]; /* Boot File name */
156
157 #if defined(CONFIG_CMD_PING)
158 IPaddr_t NetPingIP; /* the ip address to ping */
159
160 static void PingStart(void);
161 #endif
162
163 #if defined(CONFIG_CMD_CDP)
164 static void CDPStart(void);
165 #endif
166
167 #if defined(CONFIG_CMD_SNTP)
168 IPaddr_t NetNtpServerIP; /* NTP server IP address */
169 int NetTimeOffset=0; /* offset time from UTC */
170 #endif
171
172 #ifdef CONFIG_NETCONSOLE
173 void NcStart(void);
174 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
175 #endif
176
177 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
178
179 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
180
181 static rxhand_f *packetHandler; /* Current RX packet handler */
182 static thand_f *timeHandler; /* Current timeout handler */
183 static ulong timeStart; /* Time base value */
184 static ulong timeDelta; /* Current timeout value */
185 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
186
187 static int net_check_prereq (proto_t protocol);
188
189 /**********************************************************************/
190
191 IPaddr_t NetArpWaitPacketIP;
192 IPaddr_t NetArpWaitReplyIP;
193 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
194 uchar *NetArpWaitTxPacket; /* THE transmit packet */
195 int NetArpWaitTxPacketSize;
196 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
197 ulong NetArpWaitTimerStart;
198 int NetArpWaitTry;
199
200 void ArpRequest (void)
201 {
202 int i;
203 volatile uchar *pkt;
204 ARP_t *arp;
205
206 #ifdef ET_DEBUG
207 printf ("ARP broadcast %d\n", NetArpWaitTry);
208 #endif
209 pkt = NetTxPacket;
210
211 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
212
213 arp = (ARP_t *) pkt;
214
215 arp->ar_hrd = htons (ARP_ETHER);
216 arp->ar_pro = htons (PROT_IP);
217 arp->ar_hln = 6;
218 arp->ar_pln = 4;
219 arp->ar_op = htons (ARPOP_REQUEST);
220
221 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
222 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
223 for (i = 10; i < 16; ++i) {
224 arp->ar_data[i] = 0; /* dest ET addr = 0 */
225 }
226
227 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
228 (NetOurIP & NetOurSubnetMask)) {
229 if (NetOurGatewayIP == 0) {
230 puts ("## Warning: gatewayip needed but not set\n");
231 NetArpWaitReplyIP = NetArpWaitPacketIP;
232 } else {
233 NetArpWaitReplyIP = NetOurGatewayIP;
234 }
235 } else {
236 NetArpWaitReplyIP = NetArpWaitPacketIP;
237 }
238
239 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
240 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
241 }
242
243 void ArpTimeoutCheck(void)
244 {
245 ulong t;
246
247 if (!NetArpWaitPacketIP)
248 return;
249
250 t = get_timer(0);
251
252 /* check for arp timeout */
253 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ) {
254 NetArpWaitTry++;
255
256 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
257 puts ("\nARP Retry count exceeded; starting again\n");
258 NetArpWaitTry = 0;
259 NetStartAgain();
260 } else {
261 NetArpWaitTimerStart = t;
262 ArpRequest();
263 }
264 }
265 }
266
267 /**********************************************************************/
268 /*
269 * Main network processing loop.
270 */
271
272 int
273 NetLoop(proto_t protocol)
274 {
275 bd_t *bd = gd->bd;
276
277 #ifdef CONFIG_NET_MULTI
278 NetRestarted = 0;
279 NetDevExists = 0;
280 #endif
281
282 /* XXX problem with bss workaround */
283 NetArpWaitPacketMAC = NULL;
284 NetArpWaitTxPacket = NULL;
285 NetArpWaitPacketIP = 0;
286 NetArpWaitReplyIP = 0;
287 NetArpWaitTxPacket = NULL;
288 NetTxPacket = NULL;
289
290 if (!NetTxPacket) {
291 int i;
292 /*
293 * Setup packet buffers, aligned correctly.
294 */
295 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
296 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
297 for (i = 0; i < PKTBUFSRX; i++) {
298 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
299 }
300 }
301
302 if (!NetArpWaitTxPacket) {
303 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
304 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
305 NetArpWaitTxPacketSize = 0;
306 }
307
308 eth_halt();
309 #ifdef CONFIG_NET_MULTI
310 eth_set_current();
311 #endif
312 if (eth_init(bd) < 0) {
313 eth_halt();
314 return(-1);
315 }
316
317 restart:
318 #ifdef CONFIG_NET_MULTI
319 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
320 #else
321 memcpy (NetOurEther, bd->bi_enetaddr, 6);
322 #endif
323
324 NetState = NETLOOP_CONTINUE;
325
326 /*
327 * Start the ball rolling with the given start function. From
328 * here on, this code is a state machine driven by received
329 * packets and timer events.
330 */
331
332 switch (protocol) {
333 #if defined(CONFIG_CMD_NFS)
334 case NFS:
335 #endif
336 #if defined(CONFIG_CMD_PING)
337 case PING:
338 #endif
339 #if defined(CONFIG_CMD_SNTP)
340 case SNTP:
341 #endif
342 case NETCONS:
343 case TFTP:
344 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
345 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
346 NetOurSubnetMask= getenv_IPaddr ("netmask");
347 NetOurVLAN = getenv_VLAN("vlan");
348 NetOurNativeVLAN = getenv_VLAN("nvlan");
349
350 switch (protocol) {
351 #if defined(CONFIG_CMD_NFS)
352 case NFS:
353 #endif
354 case NETCONS:
355 case TFTP:
356 NetServerIP = getenv_IPaddr ("serverip");
357 break;
358 #if defined(CONFIG_CMD_PING)
359 case PING:
360 /* nothing */
361 break;
362 #endif
363 #if defined(CONFIG_CMD_SNTP)
364 case SNTP:
365 /* nothing */
366 break;
367 #endif
368 default:
369 break;
370 }
371
372 break;
373 case BOOTP:
374 case RARP:
375 /*
376 * initialize our IP addr to 0 in order to accept ANY
377 * IP addr assigned to us by the BOOTP / RARP server
378 */
379 NetOurIP = 0;
380 NetServerIP = getenv_IPaddr ("serverip");
381 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
382 NetOurNativeVLAN = getenv_VLAN("nvlan");
383 case CDP:
384 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
385 NetOurNativeVLAN = getenv_VLAN("nvlan");
386 break;
387 default:
388 break;
389 }
390
391 switch (net_check_prereq (protocol)) {
392 case 1:
393 /* network not configured */
394 eth_halt();
395 return (-1);
396
397 #ifdef CONFIG_NET_MULTI
398 case 2:
399 /* network device not configured */
400 break;
401 #endif /* CONFIG_NET_MULTI */
402
403 case 0:
404 #ifdef CONFIG_NET_MULTI
405 NetDevExists = 1;
406 #endif
407 switch (protocol) {
408 case TFTP:
409 /* always use ARP to get server ethernet address */
410 TftpStart();
411 break;
412
413 #if defined(CONFIG_CMD_DHCP)
414 case DHCP:
415 /* Start with a clean slate... */
416 BootpTry = 0;
417 NetOurIP = 0;
418 NetServerIP = getenv_IPaddr ("serverip");
419 DhcpRequest(); /* Basically same as BOOTP */
420 break;
421 #endif
422
423 case BOOTP:
424 BootpTry = 0;
425 BootpRequest ();
426 break;
427
428 case RARP:
429 RarpTry = 0;
430 RarpRequest ();
431 break;
432 #if defined(CONFIG_CMD_PING)
433 case PING:
434 PingStart();
435 break;
436 #endif
437 #if defined(CONFIG_CMD_NFS)
438 case NFS:
439 NfsStart();
440 break;
441 #endif
442 #if defined(CONFIG_CMD_CDP)
443 case CDP:
444 CDPStart();
445 break;
446 #endif
447 #ifdef CONFIG_NETCONSOLE
448 case NETCONS:
449 NcStart();
450 break;
451 #endif
452 #if defined(CONFIG_CMD_SNTP)
453 case SNTP:
454 SntpStart();
455 break;
456 #endif
457 default:
458 break;
459 }
460
461 NetBootFileXferSize = 0;
462 break;
463 }
464
465 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
466 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
467 /*
468 * Echo the inverted link state to the fault LED.
469 */
470 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
471 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
472 } else {
473 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
474 }
475 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
476 #endif /* CONFIG_MII, ... */
477
478 /*
479 * Main packet reception loop. Loop receiving packets until
480 * someone sets `NetState' to a state that terminates.
481 */
482 for (;;) {
483 WATCHDOG_RESET();
484 #ifdef CONFIG_SHOW_ACTIVITY
485 {
486 extern void show_activity(int arg);
487 show_activity(1);
488 }
489 #endif
490 /*
491 * Check the ethernet for a new packet. The ethernet
492 * receive routine will process it.
493 */
494 eth_rx();
495
496 /*
497 * Abort if ctrl-c was pressed.
498 */
499 if (ctrlc()) {
500 eth_halt();
501 puts ("\nAbort\n");
502 return (-1);
503 }
504
505 ArpTimeoutCheck();
506
507 /*
508 * Check for a timeout, and run the timeout handler
509 * if we have one.
510 */
511 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
512 thand_f *x;
513
514 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
515 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \
516 defined(CONFIG_STATUS_LED) && \
517 defined(STATUS_LED_RED)
518 /*
519 * Echo the inverted link state to the fault LED.
520 */
521 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
522 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
523 } else {
524 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
525 }
526 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
527 #endif /* CONFIG_MII, ... */
528 x = timeHandler;
529 timeHandler = (thand_f *)0;
530 (*x)();
531 }
532
533
534 switch (NetState) {
535
536 case NETLOOP_RESTART:
537 #ifdef CONFIG_NET_MULTI
538 NetRestarted = 1;
539 #endif
540 goto restart;
541
542 case NETLOOP_SUCCESS:
543 if (NetBootFileXferSize > 0) {
544 char buf[20];
545 printf("Bytes transferred = %ld (%lx hex)\n",
546 NetBootFileXferSize,
547 NetBootFileXferSize);
548 sprintf(buf, "%lX", NetBootFileXferSize);
549 setenv("filesize", buf);
550
551 sprintf(buf, "%lX", (unsigned long)load_addr);
552 setenv("fileaddr", buf);
553 }
554 eth_halt();
555 return NetBootFileXferSize;
556
557 case NETLOOP_FAIL:
558 return (-1);
559 }
560 }
561 }
562
563 /**********************************************************************/
564
565 static void
566 startAgainTimeout(void)
567 {
568 NetState = NETLOOP_RESTART;
569 }
570
571 static void
572 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
573 {
574 /* Totally ignore the packet */
575 }
576
577 void NetStartAgain (void)
578 {
579 char *nretry;
580 int noretry = 0, once = 0;
581
582 if ((nretry = getenv ("netretry")) != NULL) {
583 noretry = (strcmp (nretry, "no") == 0);
584 once = (strcmp (nretry, "once") == 0);
585 }
586 if (noretry) {
587 eth_halt ();
588 NetState = NETLOOP_FAIL;
589 return;
590 }
591 #ifndef CONFIG_NET_MULTI
592 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout);
593 NetSetHandler (startAgainHandler);
594 #else /* !CONFIG_NET_MULTI*/
595 eth_halt ();
596 eth_try_another (!NetRestarted);
597 eth_init (gd->bd);
598 if (NetRestartWrap) {
599 NetRestartWrap = 0;
600 if (NetDevExists && !once) {
601 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout);
602 NetSetHandler (startAgainHandler);
603 } else {
604 NetState = NETLOOP_FAIL;
605 }
606 } else {
607 NetState = NETLOOP_RESTART;
608 }
609 #endif /* CONFIG_NET_MULTI */
610 }
611
612 /**********************************************************************/
613 /*
614 * Miscelaneous bits.
615 */
616
617 void
618 NetSetHandler(rxhand_f * f)
619 {
620 packetHandler = f;
621 }
622
623
624 void
625 NetSetTimeout(ulong iv, thand_f * f)
626 {
627 if (iv == 0) {
628 timeHandler = (thand_f *)0;
629 } else {
630 timeHandler = f;
631 timeStart = get_timer(0);
632 timeDelta = iv;
633 }
634 }
635
636
637 void
638 NetSendPacket(volatile uchar * pkt, int len)
639 {
640 (void) eth_send(pkt, len);
641 }
642
643 int
644 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
645 {
646 uchar *pkt;
647
648 /* convert to new style broadcast */
649 if (dest == 0)
650 dest = 0xFFFFFFFF;
651
652 /* if broadcast, make the ether address a broadcast and don't do ARP */
653 if (dest == 0xFFFFFFFF)
654 ether = NetBcastAddr;
655
656 /* if MAC address was not discovered yet, save the packet and do an ARP request */
657 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
658
659 #ifdef ET_DEBUG
660 printf("sending ARP for %08lx\n", dest);
661 #endif
662 NetArpWaitPacketIP = dest;
663 NetArpWaitPacketMAC = ether;
664
665 pkt = NetArpWaitTxPacket;
666 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
667
668 NetSetIP (pkt, dest, dport, sport, len);
669 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
670
671 /* size of the waiting packet */
672 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
673
674 /* and do the ARP request */
675 NetArpWaitTry = 1;
676 NetArpWaitTimerStart = get_timer(0);
677 ArpRequest();
678 return 1; /* waiting */
679 }
680
681 #ifdef ET_DEBUG
682 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n",
683 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]);
684 #endif
685
686 pkt = (uchar *)NetTxPacket;
687 pkt += NetSetEther (pkt, ether, PROT_IP);
688 NetSetIP (pkt, dest, dport, sport, len);
689 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
690
691 return 0; /* transmitted */
692 }
693
694 #if defined(CONFIG_CMD_PING)
695 static ushort PingSeqNo;
696
697 int PingSend(void)
698 {
699 static uchar mac[6];
700 volatile IP_t *ip;
701 volatile ushort *s;
702 uchar *pkt;
703
704 /* XXX always send arp request */
705
706 memcpy(mac, NetEtherNullAddr, 6);
707
708 #ifdef ET_DEBUG
709 printf("sending ARP for %08lx\n", NetPingIP);
710 #endif
711
712 NetArpWaitPacketIP = NetPingIP;
713 NetArpWaitPacketMAC = mac;
714
715 pkt = NetArpWaitTxPacket;
716 pkt += NetSetEther(pkt, mac, PROT_IP);
717
718 ip = (volatile IP_t *)pkt;
719
720 /*
721 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
722 */
723 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
724 ip->ip_tos = 0;
725 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
726 ip->ip_id = htons(NetIPID++);
727 ip->ip_off = htons(0x4000); /* No fragmentation */
728 ip->ip_ttl = 255;
729 ip->ip_p = 0x01; /* ICMP */
730 ip->ip_sum = 0;
731 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
732 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
733 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
734
735 s = &ip->udp_src; /* XXX ICMP starts here */
736 s[0] = htons(0x0800); /* echo-request, code */
737 s[1] = 0; /* checksum */
738 s[2] = 0; /* identifier */
739 s[3] = htons(PingSeqNo++); /* sequence number */
740 s[1] = ~NetCksum((uchar *)s, 8/2);
741
742 /* size of the waiting packet */
743 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
744
745 /* and do the ARP request */
746 NetArpWaitTry = 1;
747 NetArpWaitTimerStart = get_timer(0);
748 ArpRequest();
749 return 1; /* waiting */
750 }
751
752 static void
753 PingTimeout (void)
754 {
755 eth_halt();
756 NetState = NETLOOP_FAIL; /* we did not get the reply */
757 }
758
759 static void
760 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
761 {
762 IPaddr_t tmp;
763 volatile IP_t *ip = (volatile IP_t *)pkt;
764
765 tmp = NetReadIP((void *)&ip->ip_src);
766 if (tmp != NetPingIP)
767 return;
768
769 NetState = NETLOOP_SUCCESS;
770 }
771
772 static void PingStart(void)
773 {
774 #if defined(CONFIG_NET_MULTI)
775 printf ("Using %s device\n", eth_get_name());
776 #endif /* CONFIG_NET_MULTI */
777 NetSetTimeout (10UL * CFG_HZ, PingTimeout);
778 NetSetHandler (PingHandler);
779
780 PingSend();
781 }
782 #endif
783
784 #if defined(CONFIG_CMD_CDP)
785
786 #define CDP_DEVICE_ID_TLV 0x0001
787 #define CDP_ADDRESS_TLV 0x0002
788 #define CDP_PORT_ID_TLV 0x0003
789 #define CDP_CAPABILITIES_TLV 0x0004
790 #define CDP_VERSION_TLV 0x0005
791 #define CDP_PLATFORM_TLV 0x0006
792 #define CDP_NATIVE_VLAN_TLV 0x000a
793 #define CDP_APPLIANCE_VLAN_TLV 0x000e
794 #define CDP_TRIGGER_TLV 0x000f
795 #define CDP_POWER_CONSUMPTION_TLV 0x0010
796 #define CDP_SYSNAME_TLV 0x0014
797 #define CDP_SYSOBJECT_TLV 0x0015
798 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
799
800 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */
801
802 static int CDPSeq;
803 static int CDPOK;
804
805 ushort CDPNativeVLAN;
806 ushort CDPApplianceVLAN;
807
808 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
809
810 static ushort CDP_compute_csum(const uchar *buff, ushort len)
811 {
812 ushort csum;
813 int odd;
814 ulong result = 0;
815 ushort leftover;
816 ushort *p;
817
818 if (len > 0) {
819 odd = 1 & (ulong)buff;
820 if (odd) {
821 result = *buff << 8;
822 len--;
823 buff++;
824 }
825 while (len > 1) {
826 p = (ushort *)buff;
827 result += *p++;
828 buff = (uchar *)p;
829 if (result & 0x80000000)
830 result = (result & 0xFFFF) + (result >> 16);
831 len -= 2;
832 }
833 if (len) {
834 leftover = (signed short)(*(const signed char *)buff);
835 /* CISCO SUCKS big time! (and blows too):
836 * CDP uses the IP checksum algorithm with a twist;
837 * for the last byte it *sign* extends and sums.
838 */
839 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
840 }
841 while (result >> 16)
842 result = (result & 0xFFFF) + (result >> 16);
843
844 if (odd)
845 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
846 }
847
848 /* add up 16-bit and 17-bit words for 17+c bits */
849 result = (result & 0xffff) + (result >> 16);
850 /* add up 16-bit and 2-bit for 16+c bit */
851 result = (result & 0xffff) + (result >> 16);
852 /* add up carry.. */
853 result = (result & 0xffff) + (result >> 16);
854
855 /* negate */
856 csum = ~(ushort)result;
857
858 /* run time endian detection */
859 if (csum != htons(csum)) /* little endian */
860 csum = htons(csum);
861
862 return csum;
863 }
864
865 int CDPSendTrigger(void)
866 {
867 volatile uchar *pkt;
868 volatile ushort *s;
869 volatile ushort *cp;
870 Ethernet_t *et;
871 int len;
872 ushort chksum;
873 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
874 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
875 char buf[32];
876 #endif
877
878 pkt = NetTxPacket;
879 et = (Ethernet_t *)pkt;
880
881 /* NOTE: trigger sent not on any VLAN */
882
883 /* form ethernet header */
884 memcpy(et->et_dest, NetCDPAddr, 6);
885 memcpy(et->et_src, NetOurEther, 6);
886
887 pkt += ETHER_HDR_SIZE;
888
889 /* SNAP header */
890 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
891 pkt += sizeof(CDP_SNAP_hdr);
892
893 /* CDP header */
894 *pkt++ = 0x02; /* CDP version 2 */
895 *pkt++ = 180; /* TTL */
896 s = (volatile ushort *)pkt;
897 cp = s;
898 *s++ = htons(0); /* checksum (0 for later calculation) */
899
900 /* CDP fields */
901 #ifdef CONFIG_CDP_DEVICE_ID
902 *s++ = htons(CDP_DEVICE_ID_TLV);
903 *s++ = htons(CONFIG_CDP_DEVICE_ID);
904 memset(buf, 0, sizeof(buf));
905 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X",
906 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff,
907 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff,
908 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff);
909 memcpy((uchar *)s, buf, 16);
910 s += 16 / 2;
911 #endif
912
913 #ifdef CONFIG_CDP_PORT_ID
914 *s++ = htons(CDP_PORT_ID_TLV);
915 memset(buf, 0, sizeof(buf));
916 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
917 len = strlen(buf);
918 if (len & 1) /* make it even */
919 len++;
920 *s++ = htons(len + 4);
921 memcpy((uchar *)s, buf, len);
922 s += len / 2;
923 #endif
924
925 #ifdef CONFIG_CDP_CAPABILITIES
926 *s++ = htons(CDP_CAPABILITIES_TLV);
927 *s++ = htons(8);
928 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
929 s += 2;
930 #endif
931
932 #ifdef CONFIG_CDP_VERSION
933 *s++ = htons(CDP_VERSION_TLV);
934 memset(buf, 0, sizeof(buf));
935 strcpy(buf, CONFIG_CDP_VERSION);
936 len = strlen(buf);
937 if (len & 1) /* make it even */
938 len++;
939 *s++ = htons(len + 4);
940 memcpy((uchar *)s, buf, len);
941 s += len / 2;
942 #endif
943
944 #ifdef CONFIG_CDP_PLATFORM
945 *s++ = htons(CDP_PLATFORM_TLV);
946 memset(buf, 0, sizeof(buf));
947 strcpy(buf, CONFIG_CDP_PLATFORM);
948 len = strlen(buf);
949 if (len & 1) /* make it even */
950 len++;
951 *s++ = htons(len + 4);
952 memcpy((uchar *)s, buf, len);
953 s += len / 2;
954 #endif
955
956 #ifdef CONFIG_CDP_TRIGGER
957 *s++ = htons(CDP_TRIGGER_TLV);
958 *s++ = htons(8);
959 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
960 s += 2;
961 #endif
962
963 #ifdef CONFIG_CDP_POWER_CONSUMPTION
964 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
965 *s++ = htons(6);
966 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
967 #endif
968
969 /* length of ethernet packet */
970 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
971 et->et_protlen = htons(len);
972
973 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
974 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
975 if (chksum == 0)
976 chksum = 0xFFFF;
977 *cp = htons(chksum);
978
979 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
980 return 0;
981 }
982
983 static void
984 CDPTimeout (void)
985 {
986 CDPSeq++;
987
988 if (CDPSeq < 3) {
989 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
990 CDPSendTrigger();
991 return;
992 }
993
994 /* if not OK try again */
995 if (!CDPOK)
996 NetStartAgain();
997 else
998 NetState = NETLOOP_SUCCESS;
999 }
1000
1001 static void
1002 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
1003 {
1004 /* nothing */
1005 }
1006
1007 static void
1008 CDPHandler(const uchar * pkt, unsigned len)
1009 {
1010 const uchar *t;
1011 const ushort *ss;
1012 ushort type, tlen;
1013 uchar applid;
1014 ushort vlan, nvlan;
1015
1016 /* minimum size? */
1017 if (len < sizeof(CDP_SNAP_hdr) + 4)
1018 goto pkt_short;
1019
1020 /* check for valid CDP SNAP header */
1021 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1022 return;
1023
1024 pkt += sizeof(CDP_SNAP_hdr);
1025 len -= sizeof(CDP_SNAP_hdr);
1026
1027 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1028 if (pkt[0] < 0x02 || pkt[1] == 0)
1029 return;
1030
1031 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1032 if (pkt[0] != 0x02)
1033 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1034 pkt[0] & 0xff);
1035
1036 if (CDP_compute_csum(pkt, len) != 0)
1037 return;
1038
1039 pkt += 4;
1040 len -= 4;
1041
1042 vlan = htons(-1);
1043 nvlan = htons(-1);
1044 while (len > 0) {
1045 if (len < 4)
1046 goto pkt_short;
1047
1048 ss = (const ushort *)pkt;
1049 type = ntohs(ss[0]);
1050 tlen = ntohs(ss[1]);
1051 if (tlen > len) {
1052 goto pkt_short;
1053 }
1054
1055 pkt += tlen;
1056 len -= tlen;
1057
1058 ss += 2; /* point ss to the data of the TLV */
1059 tlen -= 4;
1060
1061 switch (type) {
1062 case CDP_DEVICE_ID_TLV:
1063 break;
1064 case CDP_ADDRESS_TLV:
1065 break;
1066 case CDP_PORT_ID_TLV:
1067 break;
1068 case CDP_CAPABILITIES_TLV:
1069 break;
1070 case CDP_VERSION_TLV:
1071 break;
1072 case CDP_PLATFORM_TLV:
1073 break;
1074 case CDP_NATIVE_VLAN_TLV:
1075 nvlan = *ss;
1076 break;
1077 case CDP_APPLIANCE_VLAN_TLV:
1078 t = (const uchar *)ss;
1079 while (tlen > 0) {
1080 if (tlen < 3)
1081 goto pkt_short;
1082
1083 applid = t[0];
1084 ss = (const ushort *)(t + 1);
1085
1086 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1087 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1088 vlan = *ss;
1089 #else
1090 vlan = ntohs(*ss); /* XXX will this work; dunno */
1091 #endif
1092 t += 3; tlen -= 3;
1093 }
1094 break;
1095 case CDP_TRIGGER_TLV:
1096 break;
1097 case CDP_POWER_CONSUMPTION_TLV:
1098 break;
1099 case CDP_SYSNAME_TLV:
1100 break;
1101 case CDP_SYSOBJECT_TLV:
1102 break;
1103 case CDP_MANAGEMENT_ADDRESS_TLV:
1104 break;
1105 }
1106 }
1107
1108 CDPApplianceVLAN = vlan;
1109 CDPNativeVLAN = nvlan;
1110
1111 CDPOK = 1;
1112 return;
1113
1114 pkt_short:
1115 printf("** CDP packet is too short\n");
1116 return;
1117 }
1118
1119 static void CDPStart(void)
1120 {
1121 #if defined(CONFIG_NET_MULTI)
1122 printf ("Using %s device\n", eth_get_name());
1123 #endif
1124 CDPSeq = 0;
1125 CDPOK = 0;
1126
1127 CDPNativeVLAN = htons(-1);
1128 CDPApplianceVLAN = htons(-1);
1129
1130 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1131 NetSetHandler (CDPDummyHandler);
1132
1133 CDPSendTrigger();
1134 }
1135 #endif
1136
1137
1138 void
1139 NetReceive(volatile uchar * inpkt, int len)
1140 {
1141 Ethernet_t *et;
1142 IP_t *ip;
1143 ARP_t *arp;
1144 IPaddr_t tmp;
1145 int x;
1146 uchar *pkt;
1147 #if defined(CONFIG_CMD_CDP)
1148 int iscdp;
1149 #endif
1150 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1151
1152 #ifdef ET_DEBUG
1153 printf("packet received\n");
1154 #endif
1155
1156 NetRxPkt = inpkt;
1157 NetRxPktLen = len;
1158 et = (Ethernet_t *)inpkt;
1159
1160 /* too small packet? */
1161 if (len < ETHER_HDR_SIZE)
1162 return;
1163
1164 #if defined(CONFIG_CMD_CDP)
1165 /* keep track if packet is CDP */
1166 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1167 #endif
1168
1169 myvlanid = ntohs(NetOurVLAN);
1170 if (myvlanid == (ushort)-1)
1171 myvlanid = VLAN_NONE;
1172 mynvlanid = ntohs(NetOurNativeVLAN);
1173 if (mynvlanid == (ushort)-1)
1174 mynvlanid = VLAN_NONE;
1175
1176 x = ntohs(et->et_protlen);
1177
1178 #ifdef ET_DEBUG
1179 printf("packet received\n");
1180 #endif
1181
1182 if (x < 1514) {
1183 /*
1184 * Got a 802 packet. Check the other protocol field.
1185 */
1186 x = ntohs(et->et_prot);
1187
1188 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1189 len -= E802_HDR_SIZE;
1190
1191 } else if (x != PROT_VLAN) { /* normal packet */
1192 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1193 len -= ETHER_HDR_SIZE;
1194
1195 } else { /* VLAN packet */
1196 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1197
1198 #ifdef ET_DEBUG
1199 printf("VLAN packet received\n");
1200 #endif
1201 /* too small packet? */
1202 if (len < VLAN_ETHER_HDR_SIZE)
1203 return;
1204
1205 /* if no VLAN active */
1206 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1207 #if defined(CONFIG_CMD_CDP)
1208 && iscdp == 0
1209 #endif
1210 )
1211 return;
1212
1213 cti = ntohs(vet->vet_tag);
1214 vlanid = cti & VLAN_IDMASK;
1215 x = ntohs(vet->vet_type);
1216
1217 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1218 len -= VLAN_ETHER_HDR_SIZE;
1219 }
1220
1221 #ifdef ET_DEBUG
1222 printf("Receive from protocol 0x%x\n", x);
1223 #endif
1224
1225 #if defined(CONFIG_CMD_CDP)
1226 if (iscdp) {
1227 CDPHandler((uchar *)ip, len);
1228 return;
1229 }
1230 #endif
1231
1232 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1233 if (vlanid == VLAN_NONE)
1234 vlanid = (mynvlanid & VLAN_IDMASK);
1235 /* not matched? */
1236 if (vlanid != (myvlanid & VLAN_IDMASK))
1237 return;
1238 }
1239
1240 switch (x) {
1241
1242 case PROT_ARP:
1243 /*
1244 * We have to deal with two types of ARP packets:
1245 * - REQUEST packets will be answered by sending our
1246 * IP address - if we know it.
1247 * - REPLY packates are expected only after we asked
1248 * for the TFTP server's or the gateway's ethernet
1249 * address; so if we receive such a packet, we set
1250 * the server ethernet address
1251 */
1252 #ifdef ET_DEBUG
1253 puts ("Got ARP\n");
1254 #endif
1255 arp = (ARP_t *)ip;
1256 if (len < ARP_HDR_SIZE) {
1257 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1258 return;
1259 }
1260 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1261 return;
1262 }
1263 if (ntohs(arp->ar_pro) != PROT_IP) {
1264 return;
1265 }
1266 if (arp->ar_hln != 6) {
1267 return;
1268 }
1269 if (arp->ar_pln != 4) {
1270 return;
1271 }
1272
1273 if (NetOurIP == 0) {
1274 return;
1275 }
1276
1277 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1278 return;
1279 }
1280
1281 switch (ntohs(arp->ar_op)) {
1282 case ARPOP_REQUEST: /* reply with our IP address */
1283 #ifdef ET_DEBUG
1284 puts ("Got ARP REQUEST, return our IP\n");
1285 #endif
1286 pkt = (uchar *)et;
1287 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1288 arp->ar_op = htons(ARPOP_REPLY);
1289 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1290 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1291 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1292 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1293 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1294 return;
1295
1296 case ARPOP_REPLY: /* arp reply */
1297 /* are we waiting for a reply */
1298 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1299 break;
1300 #ifdef ET_DEBUG
1301 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n",
1302 arp->ar_data[0], arp->ar_data[1],
1303 arp->ar_data[2], arp->ar_data[3],
1304 arp->ar_data[4], arp->ar_data[5]);
1305 #endif
1306
1307 tmp = NetReadIP(&arp->ar_data[6]);
1308
1309 /* matched waiting packet's address */
1310 if (tmp == NetArpWaitReplyIP) {
1311 #ifdef ET_DEBUG
1312 puts ("Got it\n");
1313 #endif
1314 /* save address for later use */
1315 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1316
1317 #ifdef CONFIG_NETCONSOLE
1318 (*packetHandler)(0,0,0,0);
1319 #endif
1320 /* modify header, and transmit it */
1321 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1322 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1323
1324 /* no arp request pending now */
1325 NetArpWaitPacketIP = 0;
1326 NetArpWaitTxPacketSize = 0;
1327 NetArpWaitPacketMAC = NULL;
1328
1329 }
1330 return;
1331 default:
1332 #ifdef ET_DEBUG
1333 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1334 #endif
1335 return;
1336 }
1337 break;
1338
1339 case PROT_RARP:
1340 #ifdef ET_DEBUG
1341 puts ("Got RARP\n");
1342 #endif
1343 arp = (ARP_t *)ip;
1344 if (len < ARP_HDR_SIZE) {
1345 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1346 return;
1347 }
1348
1349 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1350 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1351 (ntohs(arp->ar_pro) != PROT_IP) ||
1352 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1353
1354 puts ("invalid RARP header\n");
1355 } else {
1356 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1357 if (NetServerIP == 0)
1358 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1359 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1360
1361 (*packetHandler)(0,0,0,0);
1362 }
1363 break;
1364
1365 case PROT_IP:
1366 #ifdef ET_DEBUG
1367 puts ("Got IP\n");
1368 #endif
1369 if (len < IP_HDR_SIZE) {
1370 debug ("len bad %d < %d\n", len, IP_HDR_SIZE);
1371 return;
1372 }
1373 if (len < ntohs(ip->ip_len)) {
1374 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1375 return;
1376 }
1377 len = ntohs(ip->ip_len);
1378 #ifdef ET_DEBUG
1379 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1380 #endif
1381 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1382 return;
1383 }
1384 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
1385 return;
1386 }
1387 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1388 puts ("checksum bad\n");
1389 return;
1390 }
1391 tmp = NetReadIP(&ip->ip_dst);
1392 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1393 #ifdef CONFIG_MCAST_TFTP
1394 if (Mcast_addr != tmp)
1395 #endif
1396 return;
1397 }
1398 /*
1399 * watch for ICMP host redirects
1400 *
1401 * There is no real handler code (yet). We just watch
1402 * for ICMP host redirect messages. In case anybody
1403 * sees these messages: please contact me
1404 * (wd@denx.de), or - even better - send me the
1405 * necessary fixes :-)
1406 *
1407 * Note: in all cases where I have seen this so far
1408 * it was a problem with the router configuration,
1409 * for instance when a router was configured in the
1410 * BOOTP reply, but the TFTP server was on the same
1411 * subnet. So this is probably a warning that your
1412 * configuration might be wrong. But I'm not really
1413 * sure if there aren't any other situations.
1414 */
1415 if (ip->ip_p == IPPROTO_ICMP) {
1416 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1417
1418 switch (icmph->type) {
1419 case ICMP_REDIRECT:
1420 if (icmph->code != ICMP_REDIR_HOST)
1421 return;
1422 puts (" ICMP Host Redirect to ");
1423 print_IPaddr(icmph->un.gateway);
1424 putc(' ');
1425 return;
1426 #if defined(CONFIG_CMD_PING)
1427 case ICMP_ECHO_REPLY:
1428 /*
1429 * IP header OK. Pass the packet to the current handler.
1430 */
1431 /* XXX point to ip packet */
1432 (*packetHandler)((uchar *)ip, 0, 0, 0);
1433 return;
1434 case ICMP_ECHO_REQUEST:
1435 #ifdef ET_DEBUG
1436 printf ("Got ICMP ECHO REQUEST, return %d bytes \n",
1437 ETHER_HDR_SIZE + len);
1438 #endif
1439 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1440 memcpy (&et->et_src[ 0], NetOurEther, 6);
1441
1442 ip->ip_sum = 0;
1443 ip->ip_off = 0;
1444 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1445 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1446 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1447
1448 icmph->type = ICMP_ECHO_REPLY;
1449 icmph->checksum = 0;
1450 icmph->checksum = ~NetCksum((uchar *)icmph,
1451 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1452 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1453 return;
1454 #endif
1455 default:
1456 return;
1457 }
1458 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1459 return;
1460 }
1461
1462 #ifdef CONFIG_UDP_CHECKSUM
1463 if (ip->udp_xsum != 0) {
1464 ulong xsum;
1465 ushort *sumptr;
1466 ushort sumlen;
1467
1468 xsum = ip->ip_p;
1469 xsum += (ntohs(ip->udp_len));
1470 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1471 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1472 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1473 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1474
1475 sumlen = ntohs(ip->udp_len);
1476 sumptr = (ushort *) &(ip->udp_src);
1477
1478 while (sumlen > 1) {
1479 ushort sumdata;
1480
1481 sumdata = *sumptr++;
1482 xsum += ntohs(sumdata);
1483 sumlen -= 2;
1484 }
1485 if (sumlen > 0) {
1486 ushort sumdata;
1487
1488 sumdata = *(unsigned char *) sumptr;
1489 sumdata = (sumdata << 8) & 0xff00;
1490 xsum += sumdata;
1491 }
1492 while ((xsum >> 16) != 0) {
1493 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1494 }
1495 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1496 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum));
1497 return;
1498 }
1499 }
1500 #endif
1501
1502
1503 #ifdef CONFIG_NETCONSOLE
1504 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1505 ntohs(ip->udp_dst),
1506 ntohs(ip->udp_src),
1507 ntohs(ip->udp_len) - 8);
1508 #endif
1509 /*
1510 * IP header OK. Pass the packet to the current handler.
1511 */
1512 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1513 ntohs(ip->udp_dst),
1514 ntohs(ip->udp_src),
1515 ntohs(ip->udp_len) - 8);
1516 break;
1517 }
1518 }
1519
1520
1521 /**********************************************************************/
1522
1523 static int net_check_prereq (proto_t protocol)
1524 {
1525 switch (protocol) {
1526 /* Fall through */
1527 #if defined(CONFIG_CMD_PING)
1528 case PING:
1529 if (NetPingIP == 0) {
1530 puts ("*** ERROR: ping address not given\n");
1531 return (1);
1532 }
1533 goto common;
1534 #endif
1535 #if defined(CONFIG_CMD_SNTP)
1536 case SNTP:
1537 if (NetNtpServerIP == 0) {
1538 puts ("*** ERROR: NTP server address not given\n");
1539 return (1);
1540 }
1541 goto common;
1542 #endif
1543 #if defined(CONFIG_CMD_NFS)
1544 case NFS:
1545 #endif
1546 case NETCONS:
1547 case TFTP:
1548 if (NetServerIP == 0) {
1549 puts ("*** ERROR: `serverip' not set\n");
1550 return (1);
1551 }
1552 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1553 common:
1554 #endif
1555
1556 if (NetOurIP == 0) {
1557 puts ("*** ERROR: `ipaddr' not set\n");
1558 return (1);
1559 }
1560 /* Fall through */
1561
1562 case DHCP:
1563 case RARP:
1564 case BOOTP:
1565 case CDP:
1566 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1567 #ifdef CONFIG_NET_MULTI
1568 extern int eth_get_dev_index (void);
1569 int num = eth_get_dev_index ();
1570
1571 switch (num) {
1572 case -1:
1573 puts ("*** ERROR: No ethernet found.\n");
1574 return (1);
1575 case 0:
1576 puts ("*** ERROR: `ethaddr' not set\n");
1577 break;
1578 default:
1579 printf ("*** ERROR: `eth%daddr' not set\n",
1580 num);
1581 break;
1582 }
1583
1584 NetStartAgain ();
1585 return (2);
1586 #else
1587 puts ("*** ERROR: `ethaddr' not set\n");
1588 return (1);
1589 #endif
1590 }
1591 /* Fall through */
1592 default:
1593 return (0);
1594 }
1595 return (0); /* OK */
1596 }
1597 /**********************************************************************/
1598
1599 int
1600 NetCksumOk(uchar * ptr, int len)
1601 {
1602 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1603 }
1604
1605
1606 unsigned
1607 NetCksum(uchar * ptr, int len)
1608 {
1609 ulong xsum;
1610 ushort *p = (ushort *)ptr;
1611
1612 xsum = 0;
1613 while (len-- > 0)
1614 xsum += *p++;
1615 xsum = (xsum & 0xffff) + (xsum >> 16);
1616 xsum = (xsum & 0xffff) + (xsum >> 16);
1617 return (xsum & 0xffff);
1618 }
1619
1620 int
1621 NetEthHdrSize(void)
1622 {
1623 ushort myvlanid;
1624
1625 myvlanid = ntohs(NetOurVLAN);
1626 if (myvlanid == (ushort)-1)
1627 myvlanid = VLAN_NONE;
1628
1629 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1630 }
1631
1632 int
1633 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1634 {
1635 Ethernet_t *et = (Ethernet_t *)xet;
1636 ushort myvlanid;
1637
1638 myvlanid = ntohs(NetOurVLAN);
1639 if (myvlanid == (ushort)-1)
1640 myvlanid = VLAN_NONE;
1641
1642 memcpy (et->et_dest, addr, 6);
1643 memcpy (et->et_src, NetOurEther, 6);
1644 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1645 et->et_protlen = htons(prot);
1646 return ETHER_HDR_SIZE;
1647 } else {
1648 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1649
1650 vet->vet_vlan_type = htons(PROT_VLAN);
1651 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1652 vet->vet_type = htons(prot);
1653 return VLAN_ETHER_HDR_SIZE;
1654 }
1655 }
1656
1657 void
1658 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1659 {
1660 volatile IP_t *ip = (IP_t *)xip;
1661
1662 /*
1663 * If the data is an odd number of bytes, zero the
1664 * byte after the last byte so that the checksum
1665 * will work.
1666 */
1667 if (len & 1)
1668 xip[IP_HDR_SIZE + len] = 0;
1669
1670 /*
1671 * Construct an IP and UDP header.
1672 * (need to set no fragment bit - XXX)
1673 */
1674 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1675 ip->ip_tos = 0;
1676 ip->ip_len = htons(IP_HDR_SIZE + len);
1677 ip->ip_id = htons(NetIPID++);
1678 ip->ip_off = htons(0x4000); /* No fragmentation */
1679 ip->ip_ttl = 255;
1680 ip->ip_p = 17; /* UDP */
1681 ip->ip_sum = 0;
1682 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1683 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1684 ip->udp_src = htons(sport);
1685 ip->udp_dst = htons(dport);
1686 ip->udp_len = htons(8 + len);
1687 ip->udp_xsum = 0;
1688 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1689 }
1690
1691 void copy_filename (char *dst, char *src, int size)
1692 {
1693 if (*src && (*src == '"')) {
1694 ++src;
1695 --size;
1696 }
1697
1698 while ((--size > 0) && *src && (*src != '"')) {
1699 *dst++ = *src++;
1700 }
1701 *dst = '\0';
1702 }
1703
1704 #endif
1705
1706 void ip_to_string (IPaddr_t x, char *s)
1707 {
1708 x = ntohl (x);
1709 sprintf (s, "%d.%d.%d.%d",
1710 (int) ((x >> 24) & 0xff),
1711 (int) ((x >> 16) & 0xff),
1712 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1713 );
1714 }
1715
1716 IPaddr_t string_to_ip(char *s)
1717 {
1718 IPaddr_t addr;
1719 char *e;
1720 int i;
1721
1722 if (s == NULL)
1723 return(0);
1724
1725 for (addr=0, i=0; i<4; ++i) {
1726 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1727 addr <<= 8;
1728 addr |= (val & 0xFF);
1729 if (s) {
1730 s = (*e) ? e+1 : e;
1731 }
1732 }
1733
1734 return (htonl(addr));
1735 }
1736
1737 void VLAN_to_string(ushort x, char *s)
1738 {
1739 x = ntohs(x);
1740
1741 if (x == (ushort)-1)
1742 x = VLAN_NONE;
1743
1744 if (x == VLAN_NONE)
1745 strcpy(s, "none");
1746 else
1747 sprintf(s, "%d", x & VLAN_IDMASK);
1748 }
1749
1750 ushort string_to_VLAN(char *s)
1751 {
1752 ushort id;
1753
1754 if (s == NULL)
1755 return htons(VLAN_NONE);
1756
1757 if (*s < '0' || *s > '9')
1758 id = VLAN_NONE;
1759 else
1760 id = (ushort)simple_strtoul(s, NULL, 10);
1761
1762 return htons(id);
1763 }
1764
1765 void print_IPaddr (IPaddr_t x)
1766 {
1767 char tmp[16];
1768
1769 ip_to_string (x, tmp);
1770
1771 puts (tmp);
1772 }
1773
1774 IPaddr_t getenv_IPaddr (char *var)
1775 {
1776 return (string_to_ip(getenv(var)));
1777 }
1778
1779 ushort getenv_VLAN(char *var)
1780 {
1781 return (string_to_VLAN(getenv(var)));
1782 }
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