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