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DHCP regression on 2009-06
[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 #if defined(CONFIG_CMD_DNS)
96 #include "dns.h"
97 #endif
98
99 #if defined(CONFIG_CMD_NET)
100
101 DECLARE_GLOBAL_DATA_PTR;
102
103 #ifndef CONFIG_ARP_TIMEOUT
104 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */
105 #else
106 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT
107 #endif
108
109
110 #ifndef CONFIG_NET_RETRY_COUNT
111 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
112 #else
113 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
114 #endif
115
116 #if 0
117 #define ET_DEBUG
118 #endif
119
120 /** BOOTP EXTENTIONS **/
121
122 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
123 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
124 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
125 #if defined(CONFIG_BOOTP_DNS2)
126 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
127 #endif
128 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
129 char NetOurHostName[32]={0,}; /* Our hostname */
130 char NetOurRootPath[64]={0,}; /* Our bootpath */
131 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
132
133 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
134 IPaddr_t Mcast_addr;
135 #endif
136
137 /** END OF BOOTP EXTENTIONS **/
138
139 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
140 uchar NetOurEther[6]; /* Our ethernet address */
141 uchar NetServerEther[6] = /* Boot server enet address */
142 { 0, 0, 0, 0, 0, 0 };
143 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
144 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
145 volatile uchar *NetRxPacket; /* Current receive packet */
146 int NetRxPacketLen; /* Current rx packet length */
147 unsigned NetIPID; /* IP packet ID */
148 uchar NetBcastAddr[6] = /* Ethernet bcast address */
149 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
150 uchar NetEtherNullAddr[6] =
151 { 0, 0, 0, 0, 0, 0 };
152 #ifdef CONFIG_API
153 void (*push_packet)(volatile void *, int len) = 0;
154 #endif
155 #if defined(CONFIG_CMD_CDP)
156 uchar NetCDPAddr[6] = /* Ethernet bcast address */
157 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
158 #endif
159 int NetState; /* Network loop state */
160 #ifdef CONFIG_NET_MULTI
161 int NetRestartWrap = 0; /* Tried all network devices */
162 static int NetRestarted = 0; /* Network loop restarted */
163 static int NetDevExists = 0; /* At least one device configured */
164 #endif
165
166 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
167 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
168 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
169
170 char BootFile[128]; /* Boot File name */
171
172 #if defined(CONFIG_CMD_PING)
173 IPaddr_t NetPingIP; /* the ip address to ping */
174
175 static void PingStart(void);
176 #endif
177
178 #if defined(CONFIG_CMD_CDP)
179 static void CDPStart(void);
180 #endif
181
182 #if defined(CONFIG_CMD_SNTP)
183 IPaddr_t NetNtpServerIP; /* NTP server IP address */
184 int NetTimeOffset=0; /* offset time from UTC */
185 #endif
186
187 #ifdef CONFIG_NETCONSOLE
188 void NcStart(void);
189 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
190 #endif
191
192 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
193
194 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
195
196 static rxhand_f *packetHandler; /* Current RX packet handler */
197 static thand_f *timeHandler; /* Current timeout handler */
198 static ulong timeStart; /* Time base value */
199 static ulong timeDelta; /* Current timeout value */
200 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
201
202 static int net_check_prereq (proto_t protocol);
203
204 /**********************************************************************/
205
206 IPaddr_t NetArpWaitPacketIP;
207 IPaddr_t NetArpWaitReplyIP;
208 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
209 uchar *NetArpWaitTxPacket; /* THE transmit packet */
210 int NetArpWaitTxPacketSize;
211 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
212 ulong NetArpWaitTimerStart;
213 int NetArpWaitTry;
214
215 void ArpRequest (void)
216 {
217 int i;
218 volatile uchar *pkt;
219 ARP_t *arp;
220
221 #ifdef ET_DEBUG
222 printf ("ARP broadcast %d\n", NetArpWaitTry);
223 #endif
224 pkt = NetTxPacket;
225
226 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
227
228 arp = (ARP_t *) pkt;
229
230 arp->ar_hrd = htons (ARP_ETHER);
231 arp->ar_pro = htons (PROT_IP);
232 arp->ar_hln = 6;
233 arp->ar_pln = 4;
234 arp->ar_op = htons (ARPOP_REQUEST);
235
236 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
237 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
238 for (i = 10; i < 16; ++i) {
239 arp->ar_data[i] = 0; /* dest ET addr = 0 */
240 }
241
242 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
243 (NetOurIP & NetOurSubnetMask)) {
244 if (NetOurGatewayIP == 0) {
245 puts ("## Warning: gatewayip needed but not set\n");
246 NetArpWaitReplyIP = NetArpWaitPacketIP;
247 } else {
248 NetArpWaitReplyIP = NetOurGatewayIP;
249 }
250 } else {
251 NetArpWaitReplyIP = NetArpWaitPacketIP;
252 }
253
254 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
255 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
256 }
257
258 void ArpTimeoutCheck(void)
259 {
260 ulong t;
261
262 if (!NetArpWaitPacketIP)
263 return;
264
265 t = get_timer(0);
266
267 /* check for arp timeout */
268 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
269 NetArpWaitTry++;
270
271 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
272 puts ("\nARP Retry count exceeded; starting again\n");
273 NetArpWaitTry = 0;
274 NetStartAgain();
275 } else {
276 NetArpWaitTimerStart = t;
277 ArpRequest();
278 }
279 }
280 }
281
282 static void
283 NetInitLoop(proto_t protocol)
284 {
285 static int env_changed_id = 0;
286 bd_t *bd = gd->bd;
287 int env_id = get_env_id ();
288
289 /* update only when the environment has changed */
290 if (env_changed_id != env_id) {
291 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
292 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
293 NetOurSubnetMask= getenv_IPaddr ("netmask");
294 NetServerIP = getenv_IPaddr ("serverip");
295 NetOurNativeVLAN = getenv_VLAN("nvlan");
296 NetOurVLAN = getenv_VLAN("vlan");
297 #if defined(CONFIG_CMD_DNS)
298 NetOurDNSIP = getenv_IPaddr("dnsip");
299 #endif
300 env_changed_id = env_id;
301 }
302
303 return;
304 }
305
306 /**********************************************************************/
307 /*
308 * Main network processing loop.
309 */
310
311 int
312 NetLoop(proto_t protocol)
313 {
314 bd_t *bd = gd->bd;
315
316 #ifdef CONFIG_NET_MULTI
317 NetRestarted = 0;
318 NetDevExists = 0;
319 #endif
320
321 /* XXX problem with bss workaround */
322 NetArpWaitPacketMAC = NULL;
323 NetArpWaitTxPacket = NULL;
324 NetArpWaitPacketIP = 0;
325 NetArpWaitReplyIP = 0;
326 NetArpWaitTxPacket = NULL;
327 NetTxPacket = NULL;
328
329 if (!NetTxPacket) {
330 int i;
331 /*
332 * Setup packet buffers, aligned correctly.
333 */
334 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
335 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
336 for (i = 0; i < PKTBUFSRX; i++) {
337 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
338 }
339 }
340
341 if (!NetArpWaitTxPacket) {
342 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
343 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
344 NetArpWaitTxPacketSize = 0;
345 }
346
347 eth_halt();
348 #ifdef CONFIG_NET_MULTI
349 eth_set_current();
350 #endif
351 if (eth_init(bd) < 0) {
352 eth_halt();
353 return(-1);
354 }
355
356 restart:
357 #ifdef CONFIG_NET_MULTI
358 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
359 #else
360 eth_getenv_enetaddr("ethaddr", NetOurEther);
361 #endif
362
363 NetState = NETLOOP_CONTINUE;
364
365 /*
366 * Start the ball rolling with the given start function. From
367 * here on, this code is a state machine driven by received
368 * packets and timer events.
369 */
370 NetInitLoop(protocol);
371
372 switch (net_check_prereq (protocol)) {
373 case 1:
374 /* network not configured */
375 eth_halt();
376 return (-1);
377
378 #ifdef CONFIG_NET_MULTI
379 case 2:
380 /* network device not configured */
381 break;
382 #endif /* CONFIG_NET_MULTI */
383
384 case 0:
385 #ifdef CONFIG_NET_MULTI
386 NetDevExists = 1;
387 #endif
388 switch (protocol) {
389 case TFTP:
390 /* always use ARP to get server ethernet address */
391 TftpStart();
392 break;
393
394 #if defined(CONFIG_CMD_DHCP)
395 case DHCP:
396 BootpTry = 0;
397 NetOurIP = 0;
398 DhcpRequest(); /* Basically same as BOOTP */
399 break;
400 #endif
401
402 case BOOTP:
403 BootpTry = 0;
404 NetOurIP = 0;
405 BootpRequest ();
406 break;
407
408 case RARP:
409 RarpTry = 0;
410 NetOurIP = 0;
411 RarpRequest ();
412 break;
413 #if defined(CONFIG_CMD_PING)
414 case PING:
415 PingStart();
416 break;
417 #endif
418 #if defined(CONFIG_CMD_NFS)
419 case NFS:
420 NfsStart();
421 break;
422 #endif
423 #if defined(CONFIG_CMD_CDP)
424 case CDP:
425 CDPStart();
426 break;
427 #endif
428 #ifdef CONFIG_NETCONSOLE
429 case NETCONS:
430 NcStart();
431 break;
432 #endif
433 #if defined(CONFIG_CMD_SNTP)
434 case SNTP:
435 SntpStart();
436 break;
437 #endif
438 #if defined(CONFIG_CMD_DNS)
439 case DNS:
440 DnsStart();
441 break;
442 #endif
443 default:
444 break;
445 }
446
447 NetBootFileXferSize = 0;
448 break;
449 }
450
451 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
452 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
453 /*
454 * Echo the inverted link state to the fault LED.
455 */
456 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
457 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
458 } else {
459 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
460 }
461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
462 #endif /* CONFIG_MII, ... */
463
464 /*
465 * Main packet reception loop. Loop receiving packets until
466 * someone sets `NetState' to a state that terminates.
467 */
468 for (;;) {
469 WATCHDOG_RESET();
470 #ifdef CONFIG_SHOW_ACTIVITY
471 {
472 extern void show_activity(int arg);
473 show_activity(1);
474 }
475 #endif
476 /*
477 * Check the ethernet for a new packet. The ethernet
478 * receive routine will process it.
479 */
480 eth_rx();
481
482 /*
483 * Abort if ctrl-c was pressed.
484 */
485 if (ctrlc()) {
486 eth_halt();
487 puts ("\nAbort\n");
488 return (-1);
489 }
490
491 ArpTimeoutCheck();
492
493 /*
494 * Check for a timeout, and run the timeout handler
495 * if we have one.
496 */
497 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
498 thand_f *x;
499
500 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
501 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
502 defined(CONFIG_STATUS_LED) && \
503 defined(STATUS_LED_RED)
504 /*
505 * Echo the inverted link state to the fault LED.
506 */
507 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
508 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
509 } else {
510 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
511 }
512 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
513 #endif /* CONFIG_MII, ... */
514 x = timeHandler;
515 timeHandler = (thand_f *)0;
516 (*x)();
517 }
518
519
520 switch (NetState) {
521
522 case NETLOOP_RESTART:
523 #ifdef CONFIG_NET_MULTI
524 NetRestarted = 1;
525 #endif
526 goto restart;
527
528 case NETLOOP_SUCCESS:
529 if (NetBootFileXferSize > 0) {
530 char buf[20];
531 printf("Bytes transferred = %ld (%lx hex)\n",
532 NetBootFileXferSize,
533 NetBootFileXferSize);
534 sprintf(buf, "%lX", NetBootFileXferSize);
535 setenv("filesize", buf);
536
537 sprintf(buf, "%lX", (unsigned long)load_addr);
538 setenv("fileaddr", buf);
539 }
540 eth_halt();
541 return NetBootFileXferSize;
542
543 case NETLOOP_FAIL:
544 return (-1);
545 }
546 }
547 }
548
549 /**********************************************************************/
550
551 static void
552 startAgainTimeout(void)
553 {
554 NetState = NETLOOP_RESTART;
555 }
556
557 static void
558 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
559 {
560 /* Totally ignore the packet */
561 }
562
563 void NetStartAgain (void)
564 {
565 char *nretry;
566 int noretry = 0, once = 0;
567
568 if ((nretry = getenv ("netretry")) != NULL) {
569 noretry = (strcmp (nretry, "no") == 0);
570 once = (strcmp (nretry, "once") == 0);
571 }
572 if (noretry) {
573 eth_halt ();
574 NetState = NETLOOP_FAIL;
575 return;
576 }
577 #ifndef CONFIG_NET_MULTI
578 NetSetTimeout (10000UL, startAgainTimeout);
579 NetSetHandler (startAgainHandler);
580 #else /* !CONFIG_NET_MULTI*/
581 eth_halt ();
582 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
583 eth_try_another (!NetRestarted);
584 #endif
585 eth_init (gd->bd);
586 if (NetRestartWrap) {
587 NetRestartWrap = 0;
588 if (NetDevExists && !once) {
589 NetSetTimeout (10000UL, startAgainTimeout);
590 NetSetHandler (startAgainHandler);
591 } else {
592 NetState = NETLOOP_FAIL;
593 }
594 } else {
595 NetState = NETLOOP_RESTART;
596 }
597 #endif /* CONFIG_NET_MULTI */
598 }
599
600 /**********************************************************************/
601 /*
602 * Miscelaneous bits.
603 */
604
605 void
606 NetSetHandler(rxhand_f * f)
607 {
608 packetHandler = f;
609 }
610
611
612 void
613 NetSetTimeout(ulong iv, thand_f * f)
614 {
615 if (iv == 0) {
616 timeHandler = (thand_f *)0;
617 } else {
618 timeHandler = f;
619 timeStart = get_timer(0);
620 timeDelta = iv;
621 }
622 }
623
624
625 void
626 NetSendPacket(volatile uchar * pkt, int len)
627 {
628 (void) eth_send(pkt, len);
629 }
630
631 int
632 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
633 {
634 uchar *pkt;
635
636 /* convert to new style broadcast */
637 if (dest == 0)
638 dest = 0xFFFFFFFF;
639
640 /* if broadcast, make the ether address a broadcast and don't do ARP */
641 if (dest == 0xFFFFFFFF)
642 ether = NetBcastAddr;
643
644 /* if MAC address was not discovered yet, save the packet and do an ARP request */
645 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
646
647 #ifdef ET_DEBUG
648 printf("sending ARP for %08lx\n", dest);
649 #endif
650 NetArpWaitPacketIP = dest;
651 NetArpWaitPacketMAC = ether;
652
653 pkt = NetArpWaitTxPacket;
654 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
655
656 NetSetIP (pkt, dest, dport, sport, len);
657 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
658
659 /* size of the waiting packet */
660 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
661
662 /* and do the ARP request */
663 NetArpWaitTry = 1;
664 NetArpWaitTimerStart = get_timer(0);
665 ArpRequest();
666 return 1; /* waiting */
667 }
668
669 #ifdef ET_DEBUG
670 printf("sending UDP to %08lx/%pM\n", dest, ether);
671 #endif
672
673 pkt = (uchar *)NetTxPacket;
674 pkt += NetSetEther (pkt, ether, PROT_IP);
675 NetSetIP (pkt, dest, dport, sport, len);
676 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
677
678 return 0; /* transmitted */
679 }
680
681 #if defined(CONFIG_CMD_PING)
682 static ushort PingSeqNo;
683
684 int PingSend(void)
685 {
686 static uchar mac[6];
687 volatile IP_t *ip;
688 volatile ushort *s;
689 uchar *pkt;
690
691 /* XXX always send arp request */
692
693 memcpy(mac, NetEtherNullAddr, 6);
694
695 #ifdef ET_DEBUG
696 printf("sending ARP for %08lx\n", NetPingIP);
697 #endif
698
699 NetArpWaitPacketIP = NetPingIP;
700 NetArpWaitPacketMAC = mac;
701
702 pkt = NetArpWaitTxPacket;
703 pkt += NetSetEther(pkt, mac, PROT_IP);
704
705 ip = (volatile IP_t *)pkt;
706
707 /*
708 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
709 */
710 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
711 ip->ip_tos = 0;
712 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
713 ip->ip_id = htons(NetIPID++);
714 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
715 ip->ip_ttl = 255;
716 ip->ip_p = 0x01; /* ICMP */
717 ip->ip_sum = 0;
718 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
719 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
720 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
721
722 s = &ip->udp_src; /* XXX ICMP starts here */
723 s[0] = htons(0x0800); /* echo-request, code */
724 s[1] = 0; /* checksum */
725 s[2] = 0; /* identifier */
726 s[3] = htons(PingSeqNo++); /* sequence number */
727 s[1] = ~NetCksum((uchar *)s, 8/2);
728
729 /* size of the waiting packet */
730 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
731
732 /* and do the ARP request */
733 NetArpWaitTry = 1;
734 NetArpWaitTimerStart = get_timer(0);
735 ArpRequest();
736 return 1; /* waiting */
737 }
738
739 static void
740 PingTimeout (void)
741 {
742 eth_halt();
743 NetState = NETLOOP_FAIL; /* we did not get the reply */
744 }
745
746 static void
747 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
748 {
749 IPaddr_t tmp;
750 volatile IP_t *ip = (volatile IP_t *)pkt;
751
752 tmp = NetReadIP((void *)&ip->ip_src);
753 if (tmp != NetPingIP)
754 return;
755
756 NetState = NETLOOP_SUCCESS;
757 }
758
759 static void PingStart(void)
760 {
761 #if defined(CONFIG_NET_MULTI)
762 printf ("Using %s device\n", eth_get_name());
763 #endif /* CONFIG_NET_MULTI */
764 NetSetTimeout (10000UL, PingTimeout);
765 NetSetHandler (PingHandler);
766
767 PingSend();
768 }
769 #endif
770
771 #if defined(CONFIG_CMD_CDP)
772
773 #define CDP_DEVICE_ID_TLV 0x0001
774 #define CDP_ADDRESS_TLV 0x0002
775 #define CDP_PORT_ID_TLV 0x0003
776 #define CDP_CAPABILITIES_TLV 0x0004
777 #define CDP_VERSION_TLV 0x0005
778 #define CDP_PLATFORM_TLV 0x0006
779 #define CDP_NATIVE_VLAN_TLV 0x000a
780 #define CDP_APPLIANCE_VLAN_TLV 0x000e
781 #define CDP_TRIGGER_TLV 0x000f
782 #define CDP_POWER_CONSUMPTION_TLV 0x0010
783 #define CDP_SYSNAME_TLV 0x0014
784 #define CDP_SYSOBJECT_TLV 0x0015
785 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
786
787 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
788
789 static int CDPSeq;
790 static int CDPOK;
791
792 ushort CDPNativeVLAN;
793 ushort CDPApplianceVLAN;
794
795 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
796
797 static ushort CDP_compute_csum(const uchar *buff, ushort len)
798 {
799 ushort csum;
800 int odd;
801 ulong result = 0;
802 ushort leftover;
803 ushort *p;
804
805 if (len > 0) {
806 odd = 1 & (ulong)buff;
807 if (odd) {
808 result = *buff << 8;
809 len--;
810 buff++;
811 }
812 while (len > 1) {
813 p = (ushort *)buff;
814 result += *p++;
815 buff = (uchar *)p;
816 if (result & 0x80000000)
817 result = (result & 0xFFFF) + (result >> 16);
818 len -= 2;
819 }
820 if (len) {
821 leftover = (signed short)(*(const signed char *)buff);
822 /* CISCO SUCKS big time! (and blows too):
823 * CDP uses the IP checksum algorithm with a twist;
824 * for the last byte it *sign* extends and sums.
825 */
826 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
827 }
828 while (result >> 16)
829 result = (result & 0xFFFF) + (result >> 16);
830
831 if (odd)
832 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
833 }
834
835 /* add up 16-bit and 17-bit words for 17+c bits */
836 result = (result & 0xffff) + (result >> 16);
837 /* add up 16-bit and 2-bit for 16+c bit */
838 result = (result & 0xffff) + (result >> 16);
839 /* add up carry.. */
840 result = (result & 0xffff) + (result >> 16);
841
842 /* negate */
843 csum = ~(ushort)result;
844
845 /* run time endian detection */
846 if (csum != htons(csum)) /* little endian */
847 csum = htons(csum);
848
849 return csum;
850 }
851
852 int CDPSendTrigger(void)
853 {
854 volatile uchar *pkt;
855 volatile ushort *s;
856 volatile ushort *cp;
857 Ethernet_t *et;
858 int len;
859 ushort chksum;
860 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
861 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
862 char buf[32];
863 #endif
864
865 pkt = NetTxPacket;
866 et = (Ethernet_t *)pkt;
867
868 /* NOTE: trigger sent not on any VLAN */
869
870 /* form ethernet header */
871 memcpy(et->et_dest, NetCDPAddr, 6);
872 memcpy(et->et_src, NetOurEther, 6);
873
874 pkt += ETHER_HDR_SIZE;
875
876 /* SNAP header */
877 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
878 pkt += sizeof(CDP_SNAP_hdr);
879
880 /* CDP header */
881 *pkt++ = 0x02; /* CDP version 2 */
882 *pkt++ = 180; /* TTL */
883 s = (volatile ushort *)pkt;
884 cp = s;
885 *s++ = htons(0); /* checksum (0 for later calculation) */
886
887 /* CDP fields */
888 #ifdef CONFIG_CDP_DEVICE_ID
889 *s++ = htons(CDP_DEVICE_ID_TLV);
890 *s++ = htons(CONFIG_CDP_DEVICE_ID);
891 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
892 memcpy((uchar *)s, buf, 16);
893 s += 16 / 2;
894 #endif
895
896 #ifdef CONFIG_CDP_PORT_ID
897 *s++ = htons(CDP_PORT_ID_TLV);
898 memset(buf, 0, sizeof(buf));
899 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
900 len = strlen(buf);
901 if (len & 1) /* make it even */
902 len++;
903 *s++ = htons(len + 4);
904 memcpy((uchar *)s, buf, len);
905 s += len / 2;
906 #endif
907
908 #ifdef CONFIG_CDP_CAPABILITIES
909 *s++ = htons(CDP_CAPABILITIES_TLV);
910 *s++ = htons(8);
911 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
912 s += 2;
913 #endif
914
915 #ifdef CONFIG_CDP_VERSION
916 *s++ = htons(CDP_VERSION_TLV);
917 memset(buf, 0, sizeof(buf));
918 strcpy(buf, CONFIG_CDP_VERSION);
919 len = strlen(buf);
920 if (len & 1) /* make it even */
921 len++;
922 *s++ = htons(len + 4);
923 memcpy((uchar *)s, buf, len);
924 s += len / 2;
925 #endif
926
927 #ifdef CONFIG_CDP_PLATFORM
928 *s++ = htons(CDP_PLATFORM_TLV);
929 memset(buf, 0, sizeof(buf));
930 strcpy(buf, CONFIG_CDP_PLATFORM);
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_TRIGGER
940 *s++ = htons(CDP_TRIGGER_TLV);
941 *s++ = htons(8);
942 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
943 s += 2;
944 #endif
945
946 #ifdef CONFIG_CDP_POWER_CONSUMPTION
947 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
948 *s++ = htons(6);
949 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
950 #endif
951
952 /* length of ethernet packet */
953 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
954 et->et_protlen = htons(len);
955
956 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
957 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
958 if (chksum == 0)
959 chksum = 0xFFFF;
960 *cp = htons(chksum);
961
962 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
963 return 0;
964 }
965
966 static void
967 CDPTimeout (void)
968 {
969 CDPSeq++;
970
971 if (CDPSeq < 3) {
972 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
973 CDPSendTrigger();
974 return;
975 }
976
977 /* if not OK try again */
978 if (!CDPOK)
979 NetStartAgain();
980 else
981 NetState = NETLOOP_SUCCESS;
982 }
983
984 static void
985 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
986 {
987 /* nothing */
988 }
989
990 static void
991 CDPHandler(const uchar * pkt, unsigned len)
992 {
993 const uchar *t;
994 const ushort *ss;
995 ushort type, tlen;
996 uchar applid;
997 ushort vlan, nvlan;
998
999 /* minimum size? */
1000 if (len < sizeof(CDP_SNAP_hdr) + 4)
1001 goto pkt_short;
1002
1003 /* check for valid CDP SNAP header */
1004 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1005 return;
1006
1007 pkt += sizeof(CDP_SNAP_hdr);
1008 len -= sizeof(CDP_SNAP_hdr);
1009
1010 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1011 if (pkt[0] < 0x02 || pkt[1] == 0)
1012 return;
1013
1014 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1015 if (pkt[0] != 0x02)
1016 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1017 pkt[0] & 0xff);
1018
1019 if (CDP_compute_csum(pkt, len) != 0)
1020 return;
1021
1022 pkt += 4;
1023 len -= 4;
1024
1025 vlan = htons(-1);
1026 nvlan = htons(-1);
1027 while (len > 0) {
1028 if (len < 4)
1029 goto pkt_short;
1030
1031 ss = (const ushort *)pkt;
1032 type = ntohs(ss[0]);
1033 tlen = ntohs(ss[1]);
1034 if (tlen > len) {
1035 goto pkt_short;
1036 }
1037
1038 pkt += tlen;
1039 len -= tlen;
1040
1041 ss += 2; /* point ss to the data of the TLV */
1042 tlen -= 4;
1043
1044 switch (type) {
1045 case CDP_DEVICE_ID_TLV:
1046 break;
1047 case CDP_ADDRESS_TLV:
1048 break;
1049 case CDP_PORT_ID_TLV:
1050 break;
1051 case CDP_CAPABILITIES_TLV:
1052 break;
1053 case CDP_VERSION_TLV:
1054 break;
1055 case CDP_PLATFORM_TLV:
1056 break;
1057 case CDP_NATIVE_VLAN_TLV:
1058 nvlan = *ss;
1059 break;
1060 case CDP_APPLIANCE_VLAN_TLV:
1061 t = (const uchar *)ss;
1062 while (tlen > 0) {
1063 if (tlen < 3)
1064 goto pkt_short;
1065
1066 applid = t[0];
1067 ss = (const ushort *)(t + 1);
1068
1069 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1070 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1071 vlan = *ss;
1072 #else
1073 vlan = ntohs(*ss); /* XXX will this work; dunno */
1074 #endif
1075 t += 3; tlen -= 3;
1076 }
1077 break;
1078 case CDP_TRIGGER_TLV:
1079 break;
1080 case CDP_POWER_CONSUMPTION_TLV:
1081 break;
1082 case CDP_SYSNAME_TLV:
1083 break;
1084 case CDP_SYSOBJECT_TLV:
1085 break;
1086 case CDP_MANAGEMENT_ADDRESS_TLV:
1087 break;
1088 }
1089 }
1090
1091 CDPApplianceVLAN = vlan;
1092 CDPNativeVLAN = nvlan;
1093
1094 CDPOK = 1;
1095 return;
1096
1097 pkt_short:
1098 printf("** CDP packet is too short\n");
1099 return;
1100 }
1101
1102 static void CDPStart(void)
1103 {
1104 #if defined(CONFIG_NET_MULTI)
1105 printf ("Using %s device\n", eth_get_name());
1106 #endif
1107 CDPSeq = 0;
1108 CDPOK = 0;
1109
1110 CDPNativeVLAN = htons(-1);
1111 CDPApplianceVLAN = htons(-1);
1112
1113 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1114 NetSetHandler (CDPDummyHandler);
1115
1116 CDPSendTrigger();
1117 }
1118 #endif
1119
1120
1121 void
1122 NetReceive(volatile uchar * inpkt, int len)
1123 {
1124 Ethernet_t *et;
1125 IP_t *ip;
1126 ARP_t *arp;
1127 IPaddr_t tmp;
1128 int x;
1129 uchar *pkt;
1130 #if defined(CONFIG_CMD_CDP)
1131 int iscdp;
1132 #endif
1133 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1134
1135 #ifdef ET_DEBUG
1136 printf("packet received\n");
1137 #endif
1138
1139 NetRxPacket = inpkt;
1140 NetRxPacketLen = len;
1141 et = (Ethernet_t *)inpkt;
1142
1143 /* too small packet? */
1144 if (len < ETHER_HDR_SIZE)
1145 return;
1146
1147 #ifdef CONFIG_API
1148 if (push_packet) {
1149 (*push_packet)(inpkt, len);
1150 return;
1151 }
1152 #endif
1153
1154 #if defined(CONFIG_CMD_CDP)
1155 /* keep track if packet is CDP */
1156 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1157 #endif
1158
1159 myvlanid = ntohs(NetOurVLAN);
1160 if (myvlanid == (ushort)-1)
1161 myvlanid = VLAN_NONE;
1162 mynvlanid = ntohs(NetOurNativeVLAN);
1163 if (mynvlanid == (ushort)-1)
1164 mynvlanid = VLAN_NONE;
1165
1166 x = ntohs(et->et_protlen);
1167
1168 #ifdef ET_DEBUG
1169 printf("packet received\n");
1170 #endif
1171
1172 if (x < 1514) {
1173 /*
1174 * Got a 802 packet. Check the other protocol field.
1175 */
1176 x = ntohs(et->et_prot);
1177
1178 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1179 len -= E802_HDR_SIZE;
1180
1181 } else if (x != PROT_VLAN) { /* normal packet */
1182 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1183 len -= ETHER_HDR_SIZE;
1184
1185 } else { /* VLAN packet */
1186 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1187
1188 #ifdef ET_DEBUG
1189 printf("VLAN packet received\n");
1190 #endif
1191 /* too small packet? */
1192 if (len < VLAN_ETHER_HDR_SIZE)
1193 return;
1194
1195 /* if no VLAN active */
1196 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1197 #if defined(CONFIG_CMD_CDP)
1198 && iscdp == 0
1199 #endif
1200 )
1201 return;
1202
1203 cti = ntohs(vet->vet_tag);
1204 vlanid = cti & VLAN_IDMASK;
1205 x = ntohs(vet->vet_type);
1206
1207 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1208 len -= VLAN_ETHER_HDR_SIZE;
1209 }
1210
1211 #ifdef ET_DEBUG
1212 printf("Receive from protocol 0x%x\n", x);
1213 #endif
1214
1215 #if defined(CONFIG_CMD_CDP)
1216 if (iscdp) {
1217 CDPHandler((uchar *)ip, len);
1218 return;
1219 }
1220 #endif
1221
1222 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1223 if (vlanid == VLAN_NONE)
1224 vlanid = (mynvlanid & VLAN_IDMASK);
1225 /* not matched? */
1226 if (vlanid != (myvlanid & VLAN_IDMASK))
1227 return;
1228 }
1229
1230 switch (x) {
1231
1232 case PROT_ARP:
1233 /*
1234 * We have to deal with two types of ARP packets:
1235 * - REQUEST packets will be answered by sending our
1236 * IP address - if we know it.
1237 * - REPLY packates are expected only after we asked
1238 * for the TFTP server's or the gateway's ethernet
1239 * address; so if we receive such a packet, we set
1240 * the server ethernet address
1241 */
1242 #ifdef ET_DEBUG
1243 puts ("Got ARP\n");
1244 #endif
1245 arp = (ARP_t *)ip;
1246 if (len < ARP_HDR_SIZE) {
1247 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1248 return;
1249 }
1250 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1251 return;
1252 }
1253 if (ntohs(arp->ar_pro) != PROT_IP) {
1254 return;
1255 }
1256 if (arp->ar_hln != 6) {
1257 return;
1258 }
1259 if (arp->ar_pln != 4) {
1260 return;
1261 }
1262
1263 if (NetOurIP == 0) {
1264 return;
1265 }
1266
1267 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1268 return;
1269 }
1270
1271 switch (ntohs(arp->ar_op)) {
1272 case ARPOP_REQUEST: /* reply with our IP address */
1273 #ifdef ET_DEBUG
1274 puts ("Got ARP REQUEST, return our IP\n");
1275 #endif
1276 pkt = (uchar *)et;
1277 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1278 arp->ar_op = htons(ARPOP_REPLY);
1279 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1280 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1281 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1282 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1283 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1284 return;
1285
1286 case ARPOP_REPLY: /* arp reply */
1287 /* are we waiting for a reply */
1288 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1289 break;
1290 #ifdef ET_DEBUG
1291 printf("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1292 arp->ar_data);
1293 #endif
1294
1295 tmp = NetReadIP(&arp->ar_data[6]);
1296
1297 /* matched waiting packet's address */
1298 if (tmp == NetArpWaitReplyIP) {
1299 #ifdef ET_DEBUG
1300 puts ("Got it\n");
1301 #endif
1302 /* save address for later use */
1303 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1304
1305 #ifdef CONFIG_NETCONSOLE
1306 (*packetHandler)(0,0,0,0);
1307 #endif
1308 /* modify header, and transmit it */
1309 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1310 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1311
1312 /* no arp request pending now */
1313 NetArpWaitPacketIP = 0;
1314 NetArpWaitTxPacketSize = 0;
1315 NetArpWaitPacketMAC = NULL;
1316
1317 }
1318 return;
1319 default:
1320 #ifdef ET_DEBUG
1321 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1322 #endif
1323 return;
1324 }
1325 break;
1326
1327 case PROT_RARP:
1328 #ifdef ET_DEBUG
1329 puts ("Got RARP\n");
1330 #endif
1331 arp = (ARP_t *)ip;
1332 if (len < ARP_HDR_SIZE) {
1333 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1334 return;
1335 }
1336
1337 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1338 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1339 (ntohs(arp->ar_pro) != PROT_IP) ||
1340 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1341
1342 puts ("invalid RARP header\n");
1343 } else {
1344 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1345 if (NetServerIP == 0)
1346 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1347 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1348
1349 (*packetHandler)(0,0,0,0);
1350 }
1351 break;
1352
1353 case PROT_IP:
1354 #ifdef ET_DEBUG
1355 puts ("Got IP\n");
1356 #endif
1357 if (len < IP_HDR_SIZE) {
1358 debug ("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1359 return;
1360 }
1361 if (len < ntohs(ip->ip_len)) {
1362 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1363 return;
1364 }
1365 len = ntohs(ip->ip_len);
1366 #ifdef ET_DEBUG
1367 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1368 #endif
1369 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1370 return;
1371 }
1372 /* Can't deal with fragments */
1373 if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) {
1374 return;
1375 }
1376 /* can't deal with headers > 20 bytes */
1377 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1378 return;
1379 }
1380 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1381 puts ("checksum bad\n");
1382 return;
1383 }
1384 tmp = NetReadIP(&ip->ip_dst);
1385 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1386 #ifdef CONFIG_MCAST_TFTP
1387 if (Mcast_addr != tmp)
1388 #endif
1389 return;
1390 }
1391 /*
1392 * watch for ICMP host redirects
1393 *
1394 * There is no real handler code (yet). We just watch
1395 * for ICMP host redirect messages. In case anybody
1396 * sees these messages: please contact me
1397 * (wd@denx.de), or - even better - send me the
1398 * necessary fixes :-)
1399 *
1400 * Note: in all cases where I have seen this so far
1401 * it was a problem with the router configuration,
1402 * for instance when a router was configured in the
1403 * BOOTP reply, but the TFTP server was on the same
1404 * subnet. So this is probably a warning that your
1405 * configuration might be wrong. But I'm not really
1406 * sure if there aren't any other situations.
1407 */
1408 if (ip->ip_p == IPPROTO_ICMP) {
1409 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1410
1411 switch (icmph->type) {
1412 case ICMP_REDIRECT:
1413 if (icmph->code != ICMP_REDIR_HOST)
1414 return;
1415 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
1416 return;
1417 #if defined(CONFIG_CMD_PING)
1418 case ICMP_ECHO_REPLY:
1419 /*
1420 * IP header OK. Pass the packet to the current handler.
1421 */
1422 /* XXX point to ip packet */
1423 (*packetHandler)((uchar *)ip, 0, 0, 0);
1424 return;
1425 case ICMP_ECHO_REQUEST:
1426 #ifdef ET_DEBUG
1427 printf ("Got ICMP ECHO REQUEST, return %d bytes \n",
1428 ETHER_HDR_SIZE + len);
1429 #endif
1430 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1431 memcpy (&et->et_src[ 0], NetOurEther, 6);
1432
1433 ip->ip_sum = 0;
1434 ip->ip_off = 0;
1435 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1436 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1437 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1438
1439 icmph->type = ICMP_ECHO_REPLY;
1440 icmph->checksum = 0;
1441 icmph->checksum = ~NetCksum((uchar *)icmph,
1442 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1443 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1444 return;
1445 #endif
1446 default:
1447 return;
1448 }
1449 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1450 return;
1451 }
1452
1453 #ifdef CONFIG_UDP_CHECKSUM
1454 if (ip->udp_xsum != 0) {
1455 ulong xsum;
1456 ushort *sumptr;
1457 ushort sumlen;
1458
1459 xsum = ip->ip_p;
1460 xsum += (ntohs(ip->udp_len));
1461 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1462 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1463 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1464 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1465
1466 sumlen = ntohs(ip->udp_len);
1467 sumptr = (ushort *) &(ip->udp_src);
1468
1469 while (sumlen > 1) {
1470 ushort sumdata;
1471
1472 sumdata = *sumptr++;
1473 xsum += ntohs(sumdata);
1474 sumlen -= 2;
1475 }
1476 if (sumlen > 0) {
1477 ushort sumdata;
1478
1479 sumdata = *(unsigned char *) sumptr;
1480 sumdata = (sumdata << 8) & 0xff00;
1481 xsum += sumdata;
1482 }
1483 while ((xsum >> 16) != 0) {
1484 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1485 }
1486 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1487 printf(" UDP wrong checksum %08lx %08x\n",
1488 xsum, ntohs(ip->udp_xsum));
1489 return;
1490 }
1491 }
1492 #endif
1493
1494
1495 #ifdef CONFIG_NETCONSOLE
1496 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1497 ntohs(ip->udp_dst),
1498 ntohs(ip->udp_src),
1499 ntohs(ip->udp_len) - 8);
1500 #endif
1501 /*
1502 * IP header OK. Pass the packet to the current handler.
1503 */
1504 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1505 ntohs(ip->udp_dst),
1506 ntohs(ip->udp_src),
1507 ntohs(ip->udp_len) - 8);
1508 break;
1509 }
1510 }
1511
1512
1513 /**********************************************************************/
1514
1515 static int net_check_prereq (proto_t protocol)
1516 {
1517 switch (protocol) {
1518 /* Fall through */
1519 #if defined(CONFIG_CMD_PING)
1520 case PING:
1521 if (NetPingIP == 0) {
1522 puts ("*** ERROR: ping address not given\n");
1523 return (1);
1524 }
1525 goto common;
1526 #endif
1527 #if defined(CONFIG_CMD_SNTP)
1528 case SNTP:
1529 if (NetNtpServerIP == 0) {
1530 puts ("*** ERROR: NTP server address not given\n");
1531 return (1);
1532 }
1533 goto common;
1534 #endif
1535 #if defined(CONFIG_CMD_DNS)
1536 case DNS:
1537 if (NetOurDNSIP == 0) {
1538 puts("*** ERROR: DNS 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 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(IP_FLAGS_DFRAG); /* Don't fragment */
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 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
1707 /*
1708 * make port a little random, but use something trivial to compute
1709 */
1710 unsigned int random_port(void)
1711 {
1712 return 1024 + (get_timer(0) % 0x8000);;
1713 }
1714 #endif
1715
1716 void ip_to_string (IPaddr_t x, char *s)
1717 {
1718 x = ntohl (x);
1719 sprintf (s, "%d.%d.%d.%d",
1720 (int) ((x >> 24) & 0xff),
1721 (int) ((x >> 16) & 0xff),
1722 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1723 );
1724 }
1725
1726 IPaddr_t string_to_ip(char *s)
1727 {
1728 IPaddr_t addr;
1729 char *e;
1730 int i;
1731
1732 if (s == NULL)
1733 return(0);
1734
1735 for (addr=0, i=0; i<4; ++i) {
1736 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1737 addr <<= 8;
1738 addr |= (val & 0xFF);
1739 if (s) {
1740 s = (*e) ? e+1 : e;
1741 }
1742 }
1743
1744 return (htonl(addr));
1745 }
1746
1747 void VLAN_to_string(ushort x, char *s)
1748 {
1749 x = ntohs(x);
1750
1751 if (x == (ushort)-1)
1752 x = VLAN_NONE;
1753
1754 if (x == VLAN_NONE)
1755 strcpy(s, "none");
1756 else
1757 sprintf(s, "%d", x & VLAN_IDMASK);
1758 }
1759
1760 ushort string_to_VLAN(char *s)
1761 {
1762 ushort id;
1763
1764 if (s == NULL)
1765 return htons(VLAN_NONE);
1766
1767 if (*s < '0' || *s > '9')
1768 id = VLAN_NONE;
1769 else
1770 id = (ushort)simple_strtoul(s, NULL, 10);
1771
1772 return htons(id);
1773 }
1774
1775 IPaddr_t getenv_IPaddr (char *var)
1776 {
1777 return (string_to_ip(getenv(var)));
1778 }
1779
1780 ushort getenv_VLAN(char *var)
1781 {
1782 return (string_to_VLAN(getenv(var)));
1783 }
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