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Merge branch 'master' of git://git.denx.de/u-boot-net
[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 #if defined(CONFIG_CDP_VERSION)
93 #include <timestamp.h>
94 #endif
95
96 #if defined(CONFIG_CMD_NET)
97
98 DECLARE_GLOBAL_DATA_PTR;
99
100 #ifndef CONFIG_ARP_TIMEOUT
101 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */
102 #else
103 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT
104 #endif
105
106
107 #ifndef CONFIG_NET_RETRY_COUNT
108 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
109 #else
110 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
111 #endif
112
113 #if 0
114 #define ET_DEBUG
115 #endif
116
117 /** BOOTP EXTENTIONS **/
118
119 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
120 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
121 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
122 #if defined(CONFIG_BOOTP_DNS2)
123 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
124 #endif
125 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
126 char NetOurHostName[32]={0,}; /* Our hostname */
127 char NetOurRootPath[64]={0,}; /* Our bootpath */
128 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
129
130 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
131 IPaddr_t Mcast_addr;
132 #endif
133
134 /** END OF BOOTP EXTENTIONS **/
135
136 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
137 uchar NetOurEther[6]; /* Our ethernet address */
138 uchar NetServerEther[6] = /* Boot server enet address */
139 { 0, 0, 0, 0, 0, 0 };
140 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
141 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
142 volatile uchar *NetRxPkt; /* Current receive packet */
143 int NetRxPktLen; /* Current rx packet length */
144 unsigned NetIPID; /* IP packet ID */
145 uchar NetBcastAddr[6] = /* Ethernet bcast address */
146 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
147 uchar NetEtherNullAddr[6] =
148 { 0, 0, 0, 0, 0, 0 };
149 #ifdef CONFIG_API
150 void (*push_packet)(volatile void *, int len) = 0;
151 #endif
152 #if defined(CONFIG_CMD_CDP)
153 uchar NetCDPAddr[6] = /* Ethernet bcast address */
154 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
155 #endif
156 int NetState; /* Network loop state */
157 #ifdef CONFIG_NET_MULTI
158 int NetRestartWrap = 0; /* Tried all network devices */
159 static int NetRestarted = 0; /* Network loop restarted */
160 static int NetDevExists = 0; /* At least one device configured */
161 #endif
162
163 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
164 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
165 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
166
167 char BootFile[128]; /* Boot File name */
168
169 #if defined(CONFIG_CMD_PING)
170 IPaddr_t NetPingIP; /* the ip address to ping */
171
172 static void PingStart(void);
173 #endif
174
175 #if defined(CONFIG_CMD_CDP)
176 static void CDPStart(void);
177 #endif
178
179 #if defined(CONFIG_CMD_SNTP)
180 IPaddr_t NetNtpServerIP; /* NTP server IP address */
181 int NetTimeOffset=0; /* offset time from UTC */
182 #endif
183
184 #ifdef CONFIG_NETCONSOLE
185 void NcStart(void);
186 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
187 #endif
188
189 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
190
191 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
192
193 static rxhand_f *packetHandler; /* Current RX packet handler */
194 static thand_f *timeHandler; /* Current timeout handler */
195 static ulong timeStart; /* Time base value */
196 static ulong timeDelta; /* Current timeout value */
197 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
198
199 static int net_check_prereq (proto_t protocol);
200
201 /**********************************************************************/
202
203 IPaddr_t NetArpWaitPacketIP;
204 IPaddr_t NetArpWaitReplyIP;
205 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
206 uchar *NetArpWaitTxPacket; /* THE transmit packet */
207 int NetArpWaitTxPacketSize;
208 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
209 ulong NetArpWaitTimerStart;
210 int NetArpWaitTry;
211
212 void ArpRequest (void)
213 {
214 int i;
215 volatile uchar *pkt;
216 ARP_t *arp;
217
218 #ifdef ET_DEBUG
219 printf ("ARP broadcast %d\n", NetArpWaitTry);
220 #endif
221 pkt = NetTxPacket;
222
223 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
224
225 arp = (ARP_t *) pkt;
226
227 arp->ar_hrd = htons (ARP_ETHER);
228 arp->ar_pro = htons (PROT_IP);
229 arp->ar_hln = 6;
230 arp->ar_pln = 4;
231 arp->ar_op = htons (ARPOP_REQUEST);
232
233 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
234 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
235 for (i = 10; i < 16; ++i) {
236 arp->ar_data[i] = 0; /* dest ET addr = 0 */
237 }
238
239 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
240 (NetOurIP & NetOurSubnetMask)) {
241 if (NetOurGatewayIP == 0) {
242 puts ("## Warning: gatewayip needed but not set\n");
243 NetArpWaitReplyIP = NetArpWaitPacketIP;
244 } else {
245 NetArpWaitReplyIP = NetOurGatewayIP;
246 }
247 } else {
248 NetArpWaitReplyIP = NetArpWaitPacketIP;
249 }
250
251 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
252 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
253 }
254
255 void ArpTimeoutCheck(void)
256 {
257 ulong t;
258
259 if (!NetArpWaitPacketIP)
260 return;
261
262 t = get_timer(0);
263
264 /* check for arp timeout */
265 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
266 NetArpWaitTry++;
267
268 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
269 puts ("\nARP Retry count exceeded; starting again\n");
270 NetArpWaitTry = 0;
271 NetStartAgain();
272 } else {
273 NetArpWaitTimerStart = t;
274 ArpRequest();
275 }
276 }
277 }
278
279 /**********************************************************************/
280 /*
281 * Main network processing loop.
282 */
283
284 int
285 NetLoop(proto_t protocol)
286 {
287 bd_t *bd = gd->bd;
288
289 #ifdef CONFIG_NET_MULTI
290 NetRestarted = 0;
291 NetDevExists = 0;
292 #endif
293
294 /* XXX problem with bss workaround */
295 NetArpWaitPacketMAC = NULL;
296 NetArpWaitTxPacket = NULL;
297 NetArpWaitPacketIP = 0;
298 NetArpWaitReplyIP = 0;
299 NetArpWaitTxPacket = NULL;
300 NetTxPacket = NULL;
301
302 if (!NetTxPacket) {
303 int i;
304 /*
305 * Setup packet buffers, aligned correctly.
306 */
307 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
308 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
309 for (i = 0; i < PKTBUFSRX; i++) {
310 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
311 }
312 }
313
314 if (!NetArpWaitTxPacket) {
315 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
316 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
317 NetArpWaitTxPacketSize = 0;
318 }
319
320 eth_halt();
321 #ifdef CONFIG_NET_MULTI
322 eth_set_current();
323 #endif
324 if (eth_init(bd) < 0) {
325 eth_halt();
326 return(-1);
327 }
328
329 restart:
330 #ifdef CONFIG_NET_MULTI
331 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
332 #else
333 memcpy (NetOurEther, bd->bi_enetaddr, 6);
334 #endif
335
336 NetState = NETLOOP_CONTINUE;
337
338 /*
339 * Start the ball rolling with the given start function. From
340 * here on, this code is a state machine driven by received
341 * packets and timer events.
342 */
343
344 switch (protocol) {
345 #if defined(CONFIG_CMD_NFS)
346 case NFS:
347 #endif
348 #if defined(CONFIG_CMD_PING)
349 case PING:
350 #endif
351 #if defined(CONFIG_CMD_SNTP)
352 case SNTP:
353 #endif
354 case NETCONS:
355 case TFTP:
356 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
357 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
358 NetOurSubnetMask= getenv_IPaddr ("netmask");
359 NetOurVLAN = getenv_VLAN("vlan");
360 NetOurNativeVLAN = getenv_VLAN("nvlan");
361
362 switch (protocol) {
363 #if defined(CONFIG_CMD_NFS)
364 case NFS:
365 #endif
366 case NETCONS:
367 case TFTP:
368 NetServerIP = getenv_IPaddr ("serverip");
369 break;
370 #if defined(CONFIG_CMD_PING)
371 case PING:
372 /* nothing */
373 break;
374 #endif
375 #if defined(CONFIG_CMD_SNTP)
376 case SNTP:
377 /* nothing */
378 break;
379 #endif
380 default:
381 break;
382 }
383
384 break;
385 case BOOTP:
386 case RARP:
387 /*
388 * initialize our IP addr to 0 in order to accept ANY
389 * IP addr assigned to us by the BOOTP / RARP server
390 */
391 NetOurIP = 0;
392 NetServerIP = getenv_IPaddr ("serverip");
393 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
394 NetOurNativeVLAN = getenv_VLAN("nvlan");
395 case CDP:
396 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
397 NetOurNativeVLAN = getenv_VLAN("nvlan");
398 break;
399 default:
400 break;
401 }
402
403 switch (net_check_prereq (protocol)) {
404 case 1:
405 /* network not configured */
406 eth_halt();
407 return (-1);
408
409 #ifdef CONFIG_NET_MULTI
410 case 2:
411 /* network device not configured */
412 break;
413 #endif /* CONFIG_NET_MULTI */
414
415 case 0:
416 #ifdef CONFIG_NET_MULTI
417 NetDevExists = 1;
418 #endif
419 switch (protocol) {
420 case TFTP:
421 /* always use ARP to get server ethernet address */
422 TftpStart();
423 break;
424
425 #if defined(CONFIG_CMD_DHCP)
426 case DHCP:
427 /* Start with a clean slate... */
428 BootpTry = 0;
429 NetOurIP = 0;
430 NetServerIP = getenv_IPaddr ("serverip");
431 DhcpRequest(); /* Basically same as BOOTP */
432 break;
433 #endif
434
435 case BOOTP:
436 BootpTry = 0;
437 BootpRequest ();
438 break;
439
440 case RARP:
441 RarpTry = 0;
442 RarpRequest ();
443 break;
444 #if defined(CONFIG_CMD_PING)
445 case PING:
446 PingStart();
447 break;
448 #endif
449 #if defined(CONFIG_CMD_NFS)
450 case NFS:
451 NfsStart();
452 break;
453 #endif
454 #if defined(CONFIG_CMD_CDP)
455 case CDP:
456 CDPStart();
457 break;
458 #endif
459 #ifdef CONFIG_NETCONSOLE
460 case NETCONS:
461 NcStart();
462 break;
463 #endif
464 #if defined(CONFIG_CMD_SNTP)
465 case SNTP:
466 SntpStart();
467 break;
468 #endif
469 default:
470 break;
471 }
472
473 NetBootFileXferSize = 0;
474 break;
475 }
476
477 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
478 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
479 /*
480 * Echo the inverted link state to the fault LED.
481 */
482 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
483 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
484 } else {
485 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
486 }
487 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
488 #endif /* CONFIG_MII, ... */
489
490 /*
491 * Main packet reception loop. Loop receiving packets until
492 * someone sets `NetState' to a state that terminates.
493 */
494 for (;;) {
495 WATCHDOG_RESET();
496 #ifdef CONFIG_SHOW_ACTIVITY
497 {
498 extern void show_activity(int arg);
499 show_activity(1);
500 }
501 #endif
502 /*
503 * Check the ethernet for a new packet. The ethernet
504 * receive routine will process it.
505 */
506 eth_rx();
507
508 /*
509 * Abort if ctrl-c was pressed.
510 */
511 if (ctrlc()) {
512 eth_halt();
513 puts ("\nAbort\n");
514 return (-1);
515 }
516
517 ArpTimeoutCheck();
518
519 /*
520 * Check for a timeout, and run the timeout handler
521 * if we have one.
522 */
523 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
524 thand_f *x;
525
526 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
527 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
528 defined(CONFIG_STATUS_LED) && \
529 defined(STATUS_LED_RED)
530 /*
531 * Echo the inverted link state to the fault LED.
532 */
533 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
534 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
535 } else {
536 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
537 }
538 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
539 #endif /* CONFIG_MII, ... */
540 x = timeHandler;
541 timeHandler = (thand_f *)0;
542 (*x)();
543 }
544
545
546 switch (NetState) {
547
548 case NETLOOP_RESTART:
549 #ifdef CONFIG_NET_MULTI
550 NetRestarted = 1;
551 #endif
552 goto restart;
553
554 case NETLOOP_SUCCESS:
555 if (NetBootFileXferSize > 0) {
556 char buf[20];
557 printf("Bytes transferred = %ld (%lx hex)\n",
558 NetBootFileXferSize,
559 NetBootFileXferSize);
560 sprintf(buf, "%lX", NetBootFileXferSize);
561 setenv("filesize", buf);
562
563 sprintf(buf, "%lX", (unsigned long)load_addr);
564 setenv("fileaddr", buf);
565 }
566 eth_halt();
567 return NetBootFileXferSize;
568
569 case NETLOOP_FAIL:
570 return (-1);
571 }
572 }
573 }
574
575 /**********************************************************************/
576
577 static void
578 startAgainTimeout(void)
579 {
580 NetState = NETLOOP_RESTART;
581 }
582
583 static void
584 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
585 {
586 /* Totally ignore the packet */
587 }
588
589 void NetStartAgain (void)
590 {
591 char *nretry;
592 int noretry = 0, once = 0;
593
594 if ((nretry = getenv ("netretry")) != NULL) {
595 noretry = (strcmp (nretry, "no") == 0);
596 once = (strcmp (nretry, "once") == 0);
597 }
598 if (noretry) {
599 eth_halt ();
600 NetState = NETLOOP_FAIL;
601 return;
602 }
603 #ifndef CONFIG_NET_MULTI
604 NetSetTimeout (10000UL, startAgainTimeout);
605 NetSetHandler (startAgainHandler);
606 #else /* !CONFIG_NET_MULTI*/
607 eth_halt ();
608 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
609 eth_try_another (!NetRestarted);
610 #endif
611 eth_init (gd->bd);
612 if (NetRestartWrap) {
613 NetRestartWrap = 0;
614 if (NetDevExists && !once) {
615 NetSetTimeout (10000UL, startAgainTimeout);
616 NetSetHandler (startAgainHandler);
617 } else {
618 NetState = NETLOOP_FAIL;
619 }
620 } else {
621 NetState = NETLOOP_RESTART;
622 }
623 #endif /* CONFIG_NET_MULTI */
624 }
625
626 /**********************************************************************/
627 /*
628 * Miscelaneous bits.
629 */
630
631 void
632 NetSetHandler(rxhand_f * f)
633 {
634 packetHandler = f;
635 }
636
637
638 void
639 NetSetTimeout(ulong iv, thand_f * f)
640 {
641 if (iv == 0) {
642 timeHandler = (thand_f *)0;
643 } else {
644 timeHandler = f;
645 timeStart = get_timer(0);
646 timeDelta = iv;
647 }
648 }
649
650
651 void
652 NetSendPacket(volatile uchar * pkt, int len)
653 {
654 (void) eth_send(pkt, len);
655 }
656
657 int
658 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
659 {
660 uchar *pkt;
661
662 /* convert to new style broadcast */
663 if (dest == 0)
664 dest = 0xFFFFFFFF;
665
666 /* if broadcast, make the ether address a broadcast and don't do ARP */
667 if (dest == 0xFFFFFFFF)
668 ether = NetBcastAddr;
669
670 /* if MAC address was not discovered yet, save the packet and do an ARP request */
671 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
672
673 #ifdef ET_DEBUG
674 printf("sending ARP for %08lx\n", dest);
675 #endif
676 NetArpWaitPacketIP = dest;
677 NetArpWaitPacketMAC = ether;
678
679 pkt = NetArpWaitTxPacket;
680 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
681
682 NetSetIP (pkt, dest, dport, sport, len);
683 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
684
685 /* size of the waiting packet */
686 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
687
688 /* and do the ARP request */
689 NetArpWaitTry = 1;
690 NetArpWaitTimerStart = get_timer(0);
691 ArpRequest();
692 return 1; /* waiting */
693 }
694
695 #ifdef ET_DEBUG
696 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n",
697 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]);
698 #endif
699
700 pkt = (uchar *)NetTxPacket;
701 pkt += NetSetEther (pkt, ether, PROT_IP);
702 NetSetIP (pkt, dest, dport, sport, len);
703 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
704
705 return 0; /* transmitted */
706 }
707
708 #if defined(CONFIG_CMD_PING)
709 static ushort PingSeqNo;
710
711 int PingSend(void)
712 {
713 static uchar mac[6];
714 volatile IP_t *ip;
715 volatile ushort *s;
716 uchar *pkt;
717
718 /* XXX always send arp request */
719
720 memcpy(mac, NetEtherNullAddr, 6);
721
722 #ifdef ET_DEBUG
723 printf("sending ARP for %08lx\n", NetPingIP);
724 #endif
725
726 NetArpWaitPacketIP = NetPingIP;
727 NetArpWaitPacketMAC = mac;
728
729 pkt = NetArpWaitTxPacket;
730 pkt += NetSetEther(pkt, mac, PROT_IP);
731
732 ip = (volatile IP_t *)pkt;
733
734 /*
735 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
736 */
737 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
738 ip->ip_tos = 0;
739 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
740 ip->ip_id = htons(NetIPID++);
741 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
742 ip->ip_ttl = 255;
743 ip->ip_p = 0x01; /* ICMP */
744 ip->ip_sum = 0;
745 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
746 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
747 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
748
749 s = &ip->udp_src; /* XXX ICMP starts here */
750 s[0] = htons(0x0800); /* echo-request, code */
751 s[1] = 0; /* checksum */
752 s[2] = 0; /* identifier */
753 s[3] = htons(PingSeqNo++); /* sequence number */
754 s[1] = ~NetCksum((uchar *)s, 8/2);
755
756 /* size of the waiting packet */
757 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
758
759 /* and do the ARP request */
760 NetArpWaitTry = 1;
761 NetArpWaitTimerStart = get_timer(0);
762 ArpRequest();
763 return 1; /* waiting */
764 }
765
766 static void
767 PingTimeout (void)
768 {
769 eth_halt();
770 NetState = NETLOOP_FAIL; /* we did not get the reply */
771 }
772
773 static void
774 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
775 {
776 IPaddr_t tmp;
777 volatile IP_t *ip = (volatile IP_t *)pkt;
778
779 tmp = NetReadIP((void *)&ip->ip_src);
780 if (tmp != NetPingIP)
781 return;
782
783 NetState = NETLOOP_SUCCESS;
784 }
785
786 static void PingStart(void)
787 {
788 #if defined(CONFIG_NET_MULTI)
789 printf ("Using %s device\n", eth_get_name());
790 #endif /* CONFIG_NET_MULTI */
791 NetSetTimeout (10000UL, PingTimeout);
792 NetSetHandler (PingHandler);
793
794 PingSend();
795 }
796 #endif
797
798 #if defined(CONFIG_CMD_CDP)
799
800 #define CDP_DEVICE_ID_TLV 0x0001
801 #define CDP_ADDRESS_TLV 0x0002
802 #define CDP_PORT_ID_TLV 0x0003
803 #define CDP_CAPABILITIES_TLV 0x0004
804 #define CDP_VERSION_TLV 0x0005
805 #define CDP_PLATFORM_TLV 0x0006
806 #define CDP_NATIVE_VLAN_TLV 0x000a
807 #define CDP_APPLIANCE_VLAN_TLV 0x000e
808 #define CDP_TRIGGER_TLV 0x000f
809 #define CDP_POWER_CONSUMPTION_TLV 0x0010
810 #define CDP_SYSNAME_TLV 0x0014
811 #define CDP_SYSOBJECT_TLV 0x0015
812 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
813
814 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
815
816 static int CDPSeq;
817 static int CDPOK;
818
819 ushort CDPNativeVLAN;
820 ushort CDPApplianceVLAN;
821
822 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
823
824 static ushort CDP_compute_csum(const uchar *buff, ushort len)
825 {
826 ushort csum;
827 int odd;
828 ulong result = 0;
829 ushort leftover;
830 ushort *p;
831
832 if (len > 0) {
833 odd = 1 & (ulong)buff;
834 if (odd) {
835 result = *buff << 8;
836 len--;
837 buff++;
838 }
839 while (len > 1) {
840 p = (ushort *)buff;
841 result += *p++;
842 buff = (uchar *)p;
843 if (result & 0x80000000)
844 result = (result & 0xFFFF) + (result >> 16);
845 len -= 2;
846 }
847 if (len) {
848 leftover = (signed short)(*(const signed char *)buff);
849 /* CISCO SUCKS big time! (and blows too):
850 * CDP uses the IP checksum algorithm with a twist;
851 * for the last byte it *sign* extends and sums.
852 */
853 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
854 }
855 while (result >> 16)
856 result = (result & 0xFFFF) + (result >> 16);
857
858 if (odd)
859 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
860 }
861
862 /* add up 16-bit and 17-bit words for 17+c bits */
863 result = (result & 0xffff) + (result >> 16);
864 /* add up 16-bit and 2-bit for 16+c bit */
865 result = (result & 0xffff) + (result >> 16);
866 /* add up carry.. */
867 result = (result & 0xffff) + (result >> 16);
868
869 /* negate */
870 csum = ~(ushort)result;
871
872 /* run time endian detection */
873 if (csum != htons(csum)) /* little endian */
874 csum = htons(csum);
875
876 return csum;
877 }
878
879 int CDPSendTrigger(void)
880 {
881 volatile uchar *pkt;
882 volatile ushort *s;
883 volatile ushort *cp;
884 Ethernet_t *et;
885 int len;
886 ushort chksum;
887 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
888 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
889 char buf[32];
890 #endif
891
892 pkt = NetTxPacket;
893 et = (Ethernet_t *)pkt;
894
895 /* NOTE: trigger sent not on any VLAN */
896
897 /* form ethernet header */
898 memcpy(et->et_dest, NetCDPAddr, 6);
899 memcpy(et->et_src, NetOurEther, 6);
900
901 pkt += ETHER_HDR_SIZE;
902
903 /* SNAP header */
904 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
905 pkt += sizeof(CDP_SNAP_hdr);
906
907 /* CDP header */
908 *pkt++ = 0x02; /* CDP version 2 */
909 *pkt++ = 180; /* TTL */
910 s = (volatile ushort *)pkt;
911 cp = s;
912 *s++ = htons(0); /* checksum (0 for later calculation) */
913
914 /* CDP fields */
915 #ifdef CONFIG_CDP_DEVICE_ID
916 *s++ = htons(CDP_DEVICE_ID_TLV);
917 *s++ = htons(CONFIG_CDP_DEVICE_ID);
918 memset(buf, 0, sizeof(buf));
919 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X",
920 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff,
921 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff,
922 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff);
923 memcpy((uchar *)s, buf, 16);
924 s += 16 / 2;
925 #endif
926
927 #ifdef CONFIG_CDP_PORT_ID
928 *s++ = htons(CDP_PORT_ID_TLV);
929 memset(buf, 0, sizeof(buf));
930 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
931 len = strlen(buf);
932 if (len & 1) /* make it even */
933 len++;
934 *s++ = htons(len + 4);
935 memcpy((uchar *)s, buf, len);
936 s += len / 2;
937 #endif
938
939 #ifdef CONFIG_CDP_CAPABILITIES
940 *s++ = htons(CDP_CAPABILITIES_TLV);
941 *s++ = htons(8);
942 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
943 s += 2;
944 #endif
945
946 #ifdef CONFIG_CDP_VERSION
947 *s++ = htons(CDP_VERSION_TLV);
948 memset(buf, 0, sizeof(buf));
949 strcpy(buf, CONFIG_CDP_VERSION);
950 len = strlen(buf);
951 if (len & 1) /* make it even */
952 len++;
953 *s++ = htons(len + 4);
954 memcpy((uchar *)s, buf, len);
955 s += len / 2;
956 #endif
957
958 #ifdef CONFIG_CDP_PLATFORM
959 *s++ = htons(CDP_PLATFORM_TLV);
960 memset(buf, 0, sizeof(buf));
961 strcpy(buf, CONFIG_CDP_PLATFORM);
962 len = strlen(buf);
963 if (len & 1) /* make it even */
964 len++;
965 *s++ = htons(len + 4);
966 memcpy((uchar *)s, buf, len);
967 s += len / 2;
968 #endif
969
970 #ifdef CONFIG_CDP_TRIGGER
971 *s++ = htons(CDP_TRIGGER_TLV);
972 *s++ = htons(8);
973 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
974 s += 2;
975 #endif
976
977 #ifdef CONFIG_CDP_POWER_CONSUMPTION
978 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
979 *s++ = htons(6);
980 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
981 #endif
982
983 /* length of ethernet packet */
984 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
985 et->et_protlen = htons(len);
986
987 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
988 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
989 if (chksum == 0)
990 chksum = 0xFFFF;
991 *cp = htons(chksum);
992
993 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
994 return 0;
995 }
996
997 static void
998 CDPTimeout (void)
999 {
1000 CDPSeq++;
1001
1002 if (CDPSeq < 3) {
1003 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1004 CDPSendTrigger();
1005 return;
1006 }
1007
1008 /* if not OK try again */
1009 if (!CDPOK)
1010 NetStartAgain();
1011 else
1012 NetState = NETLOOP_SUCCESS;
1013 }
1014
1015 static void
1016 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
1017 {
1018 /* nothing */
1019 }
1020
1021 static void
1022 CDPHandler(const uchar * pkt, unsigned len)
1023 {
1024 const uchar *t;
1025 const ushort *ss;
1026 ushort type, tlen;
1027 uchar applid;
1028 ushort vlan, nvlan;
1029
1030 /* minimum size? */
1031 if (len < sizeof(CDP_SNAP_hdr) + 4)
1032 goto pkt_short;
1033
1034 /* check for valid CDP SNAP header */
1035 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1036 return;
1037
1038 pkt += sizeof(CDP_SNAP_hdr);
1039 len -= sizeof(CDP_SNAP_hdr);
1040
1041 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1042 if (pkt[0] < 0x02 || pkt[1] == 0)
1043 return;
1044
1045 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1046 if (pkt[0] != 0x02)
1047 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1048 pkt[0] & 0xff);
1049
1050 if (CDP_compute_csum(pkt, len) != 0)
1051 return;
1052
1053 pkt += 4;
1054 len -= 4;
1055
1056 vlan = htons(-1);
1057 nvlan = htons(-1);
1058 while (len > 0) {
1059 if (len < 4)
1060 goto pkt_short;
1061
1062 ss = (const ushort *)pkt;
1063 type = ntohs(ss[0]);
1064 tlen = ntohs(ss[1]);
1065 if (tlen > len) {
1066 goto pkt_short;
1067 }
1068
1069 pkt += tlen;
1070 len -= tlen;
1071
1072 ss += 2; /* point ss to the data of the TLV */
1073 tlen -= 4;
1074
1075 switch (type) {
1076 case CDP_DEVICE_ID_TLV:
1077 break;
1078 case CDP_ADDRESS_TLV:
1079 break;
1080 case CDP_PORT_ID_TLV:
1081 break;
1082 case CDP_CAPABILITIES_TLV:
1083 break;
1084 case CDP_VERSION_TLV:
1085 break;
1086 case CDP_PLATFORM_TLV:
1087 break;
1088 case CDP_NATIVE_VLAN_TLV:
1089 nvlan = *ss;
1090 break;
1091 case CDP_APPLIANCE_VLAN_TLV:
1092 t = (const uchar *)ss;
1093 while (tlen > 0) {
1094 if (tlen < 3)
1095 goto pkt_short;
1096
1097 applid = t[0];
1098 ss = (const ushort *)(t + 1);
1099
1100 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1101 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1102 vlan = *ss;
1103 #else
1104 vlan = ntohs(*ss); /* XXX will this work; dunno */
1105 #endif
1106 t += 3; tlen -= 3;
1107 }
1108 break;
1109 case CDP_TRIGGER_TLV:
1110 break;
1111 case CDP_POWER_CONSUMPTION_TLV:
1112 break;
1113 case CDP_SYSNAME_TLV:
1114 break;
1115 case CDP_SYSOBJECT_TLV:
1116 break;
1117 case CDP_MANAGEMENT_ADDRESS_TLV:
1118 break;
1119 }
1120 }
1121
1122 CDPApplianceVLAN = vlan;
1123 CDPNativeVLAN = nvlan;
1124
1125 CDPOK = 1;
1126 return;
1127
1128 pkt_short:
1129 printf("** CDP packet is too short\n");
1130 return;
1131 }
1132
1133 static void CDPStart(void)
1134 {
1135 #if defined(CONFIG_NET_MULTI)
1136 printf ("Using %s device\n", eth_get_name());
1137 #endif
1138 CDPSeq = 0;
1139 CDPOK = 0;
1140
1141 CDPNativeVLAN = htons(-1);
1142 CDPApplianceVLAN = htons(-1);
1143
1144 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1145 NetSetHandler (CDPDummyHandler);
1146
1147 CDPSendTrigger();
1148 }
1149 #endif
1150
1151
1152 void
1153 NetReceive(volatile uchar * inpkt, int len)
1154 {
1155 Ethernet_t *et;
1156 IP_t *ip;
1157 ARP_t *arp;
1158 IPaddr_t tmp;
1159 int x;
1160 uchar *pkt;
1161 #if defined(CONFIG_CMD_CDP)
1162 int iscdp;
1163 #endif
1164 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1165
1166 #ifdef ET_DEBUG
1167 printf("packet received\n");
1168 #endif
1169
1170 NetRxPkt = inpkt;
1171 NetRxPktLen = len;
1172 et = (Ethernet_t *)inpkt;
1173
1174 /* too small packet? */
1175 if (len < ETHER_HDR_SIZE)
1176 return;
1177
1178 #ifdef CONFIG_API
1179 if (push_packet) {
1180 (*push_packet)(inpkt, len);
1181 return;
1182 }
1183 #endif
1184
1185 #if defined(CONFIG_CMD_CDP)
1186 /* keep track if packet is CDP */
1187 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1188 #endif
1189
1190 myvlanid = ntohs(NetOurVLAN);
1191 if (myvlanid == (ushort)-1)
1192 myvlanid = VLAN_NONE;
1193 mynvlanid = ntohs(NetOurNativeVLAN);
1194 if (mynvlanid == (ushort)-1)
1195 mynvlanid = VLAN_NONE;
1196
1197 x = ntohs(et->et_protlen);
1198
1199 #ifdef ET_DEBUG
1200 printf("packet received\n");
1201 #endif
1202
1203 if (x < 1514) {
1204 /*
1205 * Got a 802 packet. Check the other protocol field.
1206 */
1207 x = ntohs(et->et_prot);
1208
1209 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1210 len -= E802_HDR_SIZE;
1211
1212 } else if (x != PROT_VLAN) { /* normal packet */
1213 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1214 len -= ETHER_HDR_SIZE;
1215
1216 } else { /* VLAN packet */
1217 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1218
1219 #ifdef ET_DEBUG
1220 printf("VLAN packet received\n");
1221 #endif
1222 /* too small packet? */
1223 if (len < VLAN_ETHER_HDR_SIZE)
1224 return;
1225
1226 /* if no VLAN active */
1227 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1228 #if defined(CONFIG_CMD_CDP)
1229 && iscdp == 0
1230 #endif
1231 )
1232 return;
1233
1234 cti = ntohs(vet->vet_tag);
1235 vlanid = cti & VLAN_IDMASK;
1236 x = ntohs(vet->vet_type);
1237
1238 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1239 len -= VLAN_ETHER_HDR_SIZE;
1240 }
1241
1242 #ifdef ET_DEBUG
1243 printf("Receive from protocol 0x%x\n", x);
1244 #endif
1245
1246 #if defined(CONFIG_CMD_CDP)
1247 if (iscdp) {
1248 CDPHandler((uchar *)ip, len);
1249 return;
1250 }
1251 #endif
1252
1253 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1254 if (vlanid == VLAN_NONE)
1255 vlanid = (mynvlanid & VLAN_IDMASK);
1256 /* not matched? */
1257 if (vlanid != (myvlanid & VLAN_IDMASK))
1258 return;
1259 }
1260
1261 switch (x) {
1262
1263 case PROT_ARP:
1264 /*
1265 * We have to deal with two types of ARP packets:
1266 * - REQUEST packets will be answered by sending our
1267 * IP address - if we know it.
1268 * - REPLY packates are expected only after we asked
1269 * for the TFTP server's or the gateway's ethernet
1270 * address; so if we receive such a packet, we set
1271 * the server ethernet address
1272 */
1273 #ifdef ET_DEBUG
1274 puts ("Got ARP\n");
1275 #endif
1276 arp = (ARP_t *)ip;
1277 if (len < ARP_HDR_SIZE) {
1278 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1279 return;
1280 }
1281 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1282 return;
1283 }
1284 if (ntohs(arp->ar_pro) != PROT_IP) {
1285 return;
1286 }
1287 if (arp->ar_hln != 6) {
1288 return;
1289 }
1290 if (arp->ar_pln != 4) {
1291 return;
1292 }
1293
1294 if (NetOurIP == 0) {
1295 return;
1296 }
1297
1298 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1299 return;
1300 }
1301
1302 switch (ntohs(arp->ar_op)) {
1303 case ARPOP_REQUEST: /* reply with our IP address */
1304 #ifdef ET_DEBUG
1305 puts ("Got ARP REQUEST, return our IP\n");
1306 #endif
1307 pkt = (uchar *)et;
1308 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1309 arp->ar_op = htons(ARPOP_REPLY);
1310 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1311 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1312 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1313 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1314 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1315 return;
1316
1317 case ARPOP_REPLY: /* arp reply */
1318 /* are we waiting for a reply */
1319 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1320 break;
1321 #ifdef ET_DEBUG
1322 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n",
1323 arp->ar_data[0], arp->ar_data[1],
1324 arp->ar_data[2], arp->ar_data[3],
1325 arp->ar_data[4], arp->ar_data[5]);
1326 #endif
1327
1328 tmp = NetReadIP(&arp->ar_data[6]);
1329
1330 /* matched waiting packet's address */
1331 if (tmp == NetArpWaitReplyIP) {
1332 #ifdef ET_DEBUG
1333 puts ("Got it\n");
1334 #endif
1335 /* save address for later use */
1336 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1337
1338 #ifdef CONFIG_NETCONSOLE
1339 (*packetHandler)(0,0,0,0);
1340 #endif
1341 /* modify header, and transmit it */
1342 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1343 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1344
1345 /* no arp request pending now */
1346 NetArpWaitPacketIP = 0;
1347 NetArpWaitTxPacketSize = 0;
1348 NetArpWaitPacketMAC = NULL;
1349
1350 }
1351 return;
1352 default:
1353 #ifdef ET_DEBUG
1354 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1355 #endif
1356 return;
1357 }
1358 break;
1359
1360 case PROT_RARP:
1361 #ifdef ET_DEBUG
1362 puts ("Got RARP\n");
1363 #endif
1364 arp = (ARP_t *)ip;
1365 if (len < ARP_HDR_SIZE) {
1366 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1367 return;
1368 }
1369
1370 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1371 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1372 (ntohs(arp->ar_pro) != PROT_IP) ||
1373 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1374
1375 puts ("invalid RARP header\n");
1376 } else {
1377 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1378 if (NetServerIP == 0)
1379 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1380 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1381
1382 (*packetHandler)(0,0,0,0);
1383 }
1384 break;
1385
1386 case PROT_IP:
1387 #ifdef ET_DEBUG
1388 puts ("Got IP\n");
1389 #endif
1390 if (len < IP_HDR_SIZE) {
1391 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1392 return;
1393 }
1394 if (len < ntohs(ip->ip_len)) {
1395 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1396 return;
1397 }
1398 len = ntohs(ip->ip_len);
1399 #ifdef ET_DEBUG
1400 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1401 #endif
1402 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1403 return;
1404 }
1405 /* Can't deal with fragments */
1406 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) {
1407 return;
1408 }
1409 /* can't deal with headers > 20 bytes */
1410 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1411 return;
1412 }
1413 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1414 puts ("checksum bad\n");
1415 return;
1416 }
1417 tmp = NetReadIP(&ip->ip_dst);
1418 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1419 #ifdef CONFIG_MCAST_TFTP
1420 if (Mcast_addr != tmp)
1421 #endif
1422 return;
1423 }
1424 /*
1425 * watch for ICMP host redirects
1426 *
1427 * There is no real handler code (yet). We just watch
1428 * for ICMP host redirect messages. In case anybody
1429 * sees these messages: please contact me
1430 * (wd@denx.de), or - even better - send me the
1431 * necessary fixes :-)
1432 *
1433 * Note: in all cases where I have seen this so far
1434 * it was a problem with the router configuration,
1435 * for instance when a router was configured in the
1436 * BOOTP reply, but the TFTP server was on the same
1437 * subnet. So this is probably a warning that your
1438 * configuration might be wrong. But I'm not really
1439 * sure if there aren't any other situations.
1440 */
1441 if (ip->ip_p == IPPROTO_ICMP) {
1442 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1443
1444 switch (icmph->type) {
1445 case ICMP_REDIRECT:
1446 if (icmph->code != ICMP_REDIR_HOST)
1447 return;
1448 puts (" ICMP Host Redirect to ");
1449 print_IPaddr(icmph->un.gateway);
1450 putc(' ');
1451 return;
1452 #if defined(CONFIG_CMD_PING)
1453 case ICMP_ECHO_REPLY:
1454 /*
1455 * IP header OK. Pass the packet to the current handler.
1456 */
1457 /* XXX point to ip packet */
1458 (*packetHandler)((uchar *)ip, 0, 0, 0);
1459 return;
1460 case ICMP_ECHO_REQUEST:
1461 #ifdef ET_DEBUG
1462 printf ("Got ICMP ECHO REQUEST, return %d bytes \n",
1463 ETHER_HDR_SIZE + len);
1464 #endif
1465 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1466 memcpy (&et->et_src[ 0], NetOurEther, 6);
1467
1468 ip->ip_sum = 0;
1469 ip->ip_off = 0;
1470 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1471 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1472 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1473
1474 icmph->type = ICMP_ECHO_REPLY;
1475 icmph->checksum = 0;
1476 icmph->checksum = ~NetCksum((uchar *)icmph,
1477 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1478 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1479 return;
1480 #endif
1481 default:
1482 return;
1483 }
1484 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1485 return;
1486 }
1487
1488 #ifdef CONFIG_UDP_CHECKSUM
1489 if (ip->udp_xsum != 0) {
1490 ulong xsum;
1491 ushort *sumptr;
1492 ushort sumlen;
1493
1494 xsum = ip->ip_p;
1495 xsum += (ntohs(ip->udp_len));
1496 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1497 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1498 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1499 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1500
1501 sumlen = ntohs(ip->udp_len);
1502 sumptr = (ushort *) &(ip->udp_src);
1503
1504 while (sumlen > 1) {
1505 ushort sumdata;
1506
1507 sumdata = *sumptr++;
1508 xsum += ntohs(sumdata);
1509 sumlen -= 2;
1510 }
1511 if (sumlen > 0) {
1512 ushort sumdata;
1513
1514 sumdata = *(unsigned char *) sumptr;
1515 sumdata = (sumdata << 8) & 0xff00;
1516 xsum += sumdata;
1517 }
1518 while ((xsum >> 16) != 0) {
1519 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1520 }
1521 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1522 printf(" UDP wrong checksum %08lx %08x\n",
1523 xsum, ntohs(ip->udp_xsum));
1524 return;
1525 }
1526 }
1527 #endif
1528
1529
1530 #ifdef CONFIG_NETCONSOLE
1531 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1532 ntohs(ip->udp_dst),
1533 ntohs(ip->udp_src),
1534 ntohs(ip->udp_len) - 8);
1535 #endif
1536 /*
1537 * IP header OK. Pass the packet to the current handler.
1538 */
1539 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1540 ntohs(ip->udp_dst),
1541 ntohs(ip->udp_src),
1542 ntohs(ip->udp_len) - 8);
1543 break;
1544 }
1545 }
1546
1547
1548 /**********************************************************************/
1549
1550 static int net_check_prereq (proto_t protocol)
1551 {
1552 switch (protocol) {
1553 /* Fall through */
1554 #if defined(CONFIG_CMD_PING)
1555 case PING:
1556 if (NetPingIP == 0) {
1557 puts ("*** ERROR: ping address not given\n");
1558 return (1);
1559 }
1560 goto common;
1561 #endif
1562 #if defined(CONFIG_CMD_SNTP)
1563 case SNTP:
1564 if (NetNtpServerIP == 0) {
1565 puts ("*** ERROR: NTP server address not given\n");
1566 return (1);
1567 }
1568 goto common;
1569 #endif
1570 #if defined(CONFIG_CMD_NFS)
1571 case NFS:
1572 #endif
1573 case NETCONS:
1574 case TFTP:
1575 if (NetServerIP == 0) {
1576 puts ("*** ERROR: `serverip' not set\n");
1577 return (1);
1578 }
1579 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1580 common:
1581 #endif
1582
1583 if (NetOurIP == 0) {
1584 puts ("*** ERROR: `ipaddr' not set\n");
1585 return (1);
1586 }
1587 /* Fall through */
1588
1589 case DHCP:
1590 case RARP:
1591 case BOOTP:
1592 case CDP:
1593 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1594 #ifdef CONFIG_NET_MULTI
1595 extern int eth_get_dev_index (void);
1596 int num = eth_get_dev_index ();
1597
1598 switch (num) {
1599 case -1:
1600 puts ("*** ERROR: No ethernet found.\n");
1601 return (1);
1602 case 0:
1603 puts ("*** ERROR: `ethaddr' not set\n");
1604 break;
1605 default:
1606 printf ("*** ERROR: `eth%daddr' not set\n",
1607 num);
1608 break;
1609 }
1610
1611 NetStartAgain ();
1612 return (2);
1613 #else
1614 puts ("*** ERROR: `ethaddr' not set\n");
1615 return (1);
1616 #endif
1617 }
1618 /* Fall through */
1619 default:
1620 return (0);
1621 }
1622 return (0); /* OK */
1623 }
1624 /**********************************************************************/
1625
1626 int
1627 NetCksumOk(uchar * ptr, int len)
1628 {
1629 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1630 }
1631
1632
1633 unsigned
1634 NetCksum(uchar * ptr, int len)
1635 {
1636 ulong xsum;
1637 ushort *p = (ushort *)ptr;
1638
1639 xsum = 0;
1640 while (len-- > 0)
1641 xsum += *p++;
1642 xsum = (xsum & 0xffff) + (xsum >> 16);
1643 xsum = (xsum & 0xffff) + (xsum >> 16);
1644 return (xsum & 0xffff);
1645 }
1646
1647 int
1648 NetEthHdrSize(void)
1649 {
1650 ushort myvlanid;
1651
1652 myvlanid = ntohs(NetOurVLAN);
1653 if (myvlanid == (ushort)-1)
1654 myvlanid = VLAN_NONE;
1655
1656 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1657 }
1658
1659 int
1660 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1661 {
1662 Ethernet_t *et = (Ethernet_t *)xet;
1663 ushort myvlanid;
1664
1665 myvlanid = ntohs(NetOurVLAN);
1666 if (myvlanid == (ushort)-1)
1667 myvlanid = VLAN_NONE;
1668
1669 memcpy (et->et_dest, addr, 6);
1670 memcpy (et->et_src, NetOurEther, 6);
1671 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1672 et->et_protlen = htons(prot);
1673 return ETHER_HDR_SIZE;
1674 } else {
1675 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1676
1677 vet->vet_vlan_type = htons(PROT_VLAN);
1678 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1679 vet->vet_type = htons(prot);
1680 return VLAN_ETHER_HDR_SIZE;
1681 }
1682 }
1683
1684 void
1685 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1686 {
1687 volatile IP_t *ip = (IP_t *)xip;
1688
1689 /*
1690 * If the data is an odd number of bytes, zero the
1691 * byte after the last byte so that the checksum
1692 * will work.
1693 */
1694 if (len & 1)
1695 xip[IP_HDR_SIZE + len] = 0;
1696
1697 /*
1698 * Construct an IP and UDP header.
1699 * (need to set no fragment bit - XXX)
1700 */
1701 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1702 ip->ip_tos = 0;
1703 ip->ip_len = htons(IP_HDR_SIZE + len);
1704 ip->ip_id = htons(NetIPID++);
1705 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1706 ip->ip_ttl = 255;
1707 ip->ip_p = 17; /* UDP */
1708 ip->ip_sum = 0;
1709 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1710 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1711 ip->udp_src = htons(sport);
1712 ip->udp_dst = htons(dport);
1713 ip->udp_len = htons(8 + len);
1714 ip->udp_xsum = 0;
1715 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1716 }
1717
1718 void copy_filename (char *dst, char *src, int size)
1719 {
1720 if (*src && (*src == '"')) {
1721 ++src;
1722 --size;
1723 }
1724
1725 while ((--size > 0) && *src && (*src != '"')) {
1726 *dst++ = *src++;
1727 }
1728 *dst = '\0';
1729 }
1730
1731 #endif
1732
1733 void ip_to_string (IPaddr_t x, char *s)
1734 {
1735 x = ntohl (x);
1736 sprintf (s, "%d.%d.%d.%d",
1737 (int) ((x >> 24) & 0xff),
1738 (int) ((x >> 16) & 0xff),
1739 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1740 );
1741 }
1742
1743 IPaddr_t string_to_ip(char *s)
1744 {
1745 IPaddr_t addr;
1746 char *e;
1747 int i;
1748
1749 if (s == NULL)
1750 return(0);
1751
1752 for (addr=0, i=0; i<4; ++i) {
1753 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1754 addr <<= 8;
1755 addr |= (val & 0xFF);
1756 if (s) {
1757 s = (*e) ? e+1 : e;
1758 }
1759 }
1760
1761 return (htonl(addr));
1762 }
1763
1764 void VLAN_to_string(ushort x, char *s)
1765 {
1766 x = ntohs(x);
1767
1768 if (x == (ushort)-1)
1769 x = VLAN_NONE;
1770
1771 if (x == VLAN_NONE)
1772 strcpy(s, "none");
1773 else
1774 sprintf(s, "%d", x & VLAN_IDMASK);
1775 }
1776
1777 ushort string_to_VLAN(char *s)
1778 {
1779 ushort id;
1780
1781 if (s == NULL)
1782 return htons(VLAN_NONE);
1783
1784 if (*s < '0' || *s > '9')
1785 id = VLAN_NONE;
1786 else
1787 id = (ushort)simple_strtoul(s, NULL, 10);
1788
1789 return htons(id);
1790 }
1791
1792 void print_IPaddr (IPaddr_t x)
1793 {
1794 char tmp[16];
1795
1796 ip_to_string (x, tmp);
1797
1798 puts (tmp);
1799 }
1800
1801 IPaddr_t getenv_IPaddr (char *var)
1802 {
1803 return (string_to_ip(getenv(var)));
1804 }
1805
1806 ushort getenv_VLAN(char *var)
1807 {
1808 return (string_to_VLAN(getenv(var)));
1809 }
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