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net: make ARP timeout configurable
[people/ms/u-boot.git] / net / net.c
1 /*
2 * Copied from Linux Monitor (LiMon) - Networking.
3 *
4 * Copyright 1994 - 2000 Neil Russell.
5 * (See License)
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
9 */
10
11 /*
12 * General Desription:
13 *
14 * The user interface supports commands for BOOTP, RARP, and TFTP.
15 * Also, we support ARP internally. Depending on available data,
16 * these interact as follows:
17 *
18 * BOOTP:
19 *
20 * Prerequisites: - own ethernet address
21 * We want: - own IP address
22 * - TFTP server IP address
23 * - name of bootfile
24 * Next step: ARP
25 *
26 * RARP:
27 *
28 * Prerequisites: - own ethernet address
29 * We want: - own IP address
30 * - TFTP server IP address
31 * Next step: ARP
32 *
33 * ARP:
34 *
35 * Prerequisites: - own ethernet address
36 * - own IP address
37 * - TFTP server IP address
38 * We want: - TFTP server ethernet address
39 * Next step: TFTP
40 *
41 * DHCP:
42 *
43 * Prerequisites: - own ethernet address
44 * We want: - IP, Netmask, ServerIP, Gateway IP
45 * - bootfilename, lease time
46 * Next step: - TFTP
47 *
48 * TFTP:
49 *
50 * Prerequisites: - own ethernet address
51 * - own IP address
52 * - TFTP server IP address
53 * - TFTP server ethernet address
54 * - name of bootfile (if unknown, we use a default name
55 * derived from our own IP address)
56 * We want: - load the boot file
57 * Next step: none
58 *
59 * NFS:
60 *
61 * Prerequisites: - own ethernet address
62 * - own IP address
63 * - name of bootfile (if unknown, we use a default name
64 * derived from our own IP address)
65 * We want: - load the boot file
66 * Next step: none
67 *
68 * SNTP:
69 *
70 * Prerequisites: - own ethernet address
71 * - own IP address
72 * We want: - network time
73 * Next step: none
74 */
75
76
77 #include <common.h>
78 #include <watchdog.h>
79 #include <command.h>
80 #include <net.h>
81 #include "bootp.h"
82 #include "tftp.h"
83 #include "rarp.h"
84 #include "nfs.h"
85 #ifdef CONFIG_STATUS_LED
86 #include <status_led.h>
87 #include <miiphy.h>
88 #endif
89 #if defined(CONFIG_CMD_SNTP)
90 #include "sntp.h"
91 #endif
92
93 #if defined(CONFIG_CMD_NET)
94
95 DECLARE_GLOBAL_DATA_PTR;
96
97 #ifndef CONFIG_ARP_TIMEOUT
98 # define ARP_TIMEOUT 50UL /* Deciseconds before trying ARP again */
99 #elif (CONFIG_ARP_TIMEOUT < 100)
100 # error "Due to possible overflow CONFIG_ARP_TIMEOUT must be greater than 100ms"
101 #else
102 # if (CONFIG_ARP_TIMEOUT % 100)
103 # warning "Supported ARP_TIMEOUT precision is 100ms"
104 # endif
105 # define ARP_TIMEOUT (CONFIG_ARP_TIMEOUT / 100)
106 #endif
107
108
109 #ifndef CONFIG_NET_RETRY_COUNT
110 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
111 #else
112 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
113 #endif
114
115 #if 0
116 #define ET_DEBUG
117 #endif
118
119 /** BOOTP EXTENTIONS **/
120
121 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
122 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
123 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
124 #if defined(CONFIG_BOOTP_DNS2)
125 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
126 #endif
127 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
128 char NetOurHostName[32]={0,}; /* Our hostname */
129 char NetOurRootPath[64]={0,}; /* Our bootpath */
130 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
131
132 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
133 IPaddr_t Mcast_addr;
134 #endif
135
136 /** END OF BOOTP EXTENTIONS **/
137
138 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
139 uchar NetOurEther[6]; /* Our ethernet address */
140 uchar NetServerEther[6] = /* Boot server enet address */
141 { 0, 0, 0, 0, 0, 0 };
142 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
143 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
144 volatile uchar *NetRxPkt; /* Current receive packet */
145 int NetRxPktLen; /* Current rx packet length */
146 unsigned NetIPID; /* IP packet ID */
147 uchar NetBcastAddr[6] = /* Ethernet bcast address */
148 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
149 uchar NetEtherNullAddr[6] =
150 { 0, 0, 0, 0, 0, 0 };
151 #ifdef CONFIG_API
152 void (*push_packet)(volatile void *, int len) = 0;
153 #endif
154 #if defined(CONFIG_CMD_CDP)
155 uchar NetCDPAddr[6] = /* Ethernet bcast address */
156 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
157 #endif
158 int NetState; /* Network loop state */
159 #ifdef CONFIG_NET_MULTI
160 int NetRestartWrap = 0; /* Tried all network devices */
161 static int NetRestarted = 0; /* Network loop restarted */
162 static int NetDevExists = 0; /* At least one device configured */
163 #endif
164
165 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
166 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
167 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
168
169 char BootFile[128]; /* Boot File name */
170
171 #if defined(CONFIG_CMD_PING)
172 IPaddr_t NetPingIP; /* the ip address to ping */
173
174 static void PingStart(void);
175 #endif
176
177 #if defined(CONFIG_CMD_CDP)
178 static void CDPStart(void);
179 #endif
180
181 #if defined(CONFIG_CMD_SNTP)
182 IPaddr_t NetNtpServerIP; /* NTP server IP address */
183 int NetTimeOffset=0; /* offset time from UTC */
184 #endif
185
186 #ifdef CONFIG_NETCONSOLE
187 void NcStart(void);
188 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
189 #endif
190
191 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
192
193 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
194
195 static rxhand_f *packetHandler; /* Current RX packet handler */
196 static thand_f *timeHandler; /* Current timeout handler */
197 static ulong timeStart; /* Time base value */
198 static ulong timeDelta; /* Current timeout value */
199 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
200
201 static int net_check_prereq (proto_t protocol);
202
203 /**********************************************************************/
204
205 IPaddr_t NetArpWaitPacketIP;
206 IPaddr_t NetArpWaitReplyIP;
207 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
208 uchar *NetArpWaitTxPacket; /* THE transmit packet */
209 int NetArpWaitTxPacketSize;
210 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
211 ulong NetArpWaitTimerStart;
212 int NetArpWaitTry;
213
214 void ArpRequest (void)
215 {
216 int i;
217 volatile uchar *pkt;
218 ARP_t *arp;
219
220 #ifdef ET_DEBUG
221 printf ("ARP broadcast %d\n", NetArpWaitTry);
222 #endif
223 pkt = NetTxPacket;
224
225 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
226
227 arp = (ARP_t *) pkt;
228
229 arp->ar_hrd = htons (ARP_ETHER);
230 arp->ar_pro = htons (PROT_IP);
231 arp->ar_hln = 6;
232 arp->ar_pln = 4;
233 arp->ar_op = htons (ARPOP_REQUEST);
234
235 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
236 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
237 for (i = 10; i < 16; ++i) {
238 arp->ar_data[i] = 0; /* dest ET addr = 0 */
239 }
240
241 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
242 (NetOurIP & NetOurSubnetMask)) {
243 if (NetOurGatewayIP == 0) {
244 puts ("## Warning: gatewayip needed but not set\n");
245 NetArpWaitReplyIP = NetArpWaitPacketIP;
246 } else {
247 NetArpWaitReplyIP = NetOurGatewayIP;
248 }
249 } else {
250 NetArpWaitReplyIP = NetArpWaitPacketIP;
251 }
252
253 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
254 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
255 }
256
257 void ArpTimeoutCheck(void)
258 {
259 ulong t;
260
261 if (!NetArpWaitPacketIP)
262 return;
263
264 t = get_timer(0);
265
266 /* check for arp timeout */
267 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT * CFG_HZ / 10) {
268 NetArpWaitTry++;
269
270 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
271 puts ("\nARP Retry count exceeded; starting again\n");
272 NetArpWaitTry = 0;
273 NetStartAgain();
274 } else {
275 NetArpWaitTimerStart = t;
276 ArpRequest();
277 }
278 }
279 }
280
281 /**********************************************************************/
282 /*
283 * Main network processing loop.
284 */
285
286 int
287 NetLoop(proto_t protocol)
288 {
289 bd_t *bd = gd->bd;
290
291 #ifdef CONFIG_NET_MULTI
292 NetRestarted = 0;
293 NetDevExists = 0;
294 #endif
295
296 /* XXX problem with bss workaround */
297 NetArpWaitPacketMAC = NULL;
298 NetArpWaitTxPacket = NULL;
299 NetArpWaitPacketIP = 0;
300 NetArpWaitReplyIP = 0;
301 NetArpWaitTxPacket = NULL;
302 NetTxPacket = NULL;
303
304 if (!NetTxPacket) {
305 int i;
306 /*
307 * Setup packet buffers, aligned correctly.
308 */
309 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
310 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
311 for (i = 0; i < PKTBUFSRX; i++) {
312 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
313 }
314 }
315
316 if (!NetArpWaitTxPacket) {
317 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
318 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
319 NetArpWaitTxPacketSize = 0;
320 }
321
322 eth_halt();
323 #ifdef CONFIG_NET_MULTI
324 eth_set_current();
325 #endif
326 if (eth_init(bd) < 0) {
327 eth_halt();
328 return(-1);
329 }
330
331 restart:
332 #ifdef CONFIG_NET_MULTI
333 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
334 #else
335 memcpy (NetOurEther, bd->bi_enetaddr, 6);
336 #endif
337
338 NetState = NETLOOP_CONTINUE;
339
340 /*
341 * Start the ball rolling with the given start function. From
342 * here on, this code is a state machine driven by received
343 * packets and timer events.
344 */
345
346 switch (protocol) {
347 #if defined(CONFIG_CMD_NFS)
348 case NFS:
349 #endif
350 #if defined(CONFIG_CMD_PING)
351 case PING:
352 #endif
353 #if defined(CONFIG_CMD_SNTP)
354 case SNTP:
355 #endif
356 case NETCONS:
357 case TFTP:
358 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
359 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
360 NetOurSubnetMask= getenv_IPaddr ("netmask");
361 NetOurVLAN = getenv_VLAN("vlan");
362 NetOurNativeVLAN = getenv_VLAN("nvlan");
363
364 switch (protocol) {
365 #if defined(CONFIG_CMD_NFS)
366 case NFS:
367 #endif
368 case NETCONS:
369 case TFTP:
370 NetServerIP = getenv_IPaddr ("serverip");
371 break;
372 #if defined(CONFIG_CMD_PING)
373 case PING:
374 /* nothing */
375 break;
376 #endif
377 #if defined(CONFIG_CMD_SNTP)
378 case SNTP:
379 /* nothing */
380 break;
381 #endif
382 default:
383 break;
384 }
385
386 break;
387 case BOOTP:
388 case RARP:
389 /*
390 * initialize our IP addr to 0 in order to accept ANY
391 * IP addr assigned to us by the BOOTP / RARP server
392 */
393 NetOurIP = 0;
394 NetServerIP = getenv_IPaddr ("serverip");
395 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
396 NetOurNativeVLAN = getenv_VLAN("nvlan");
397 case CDP:
398 NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
399 NetOurNativeVLAN = getenv_VLAN("nvlan");
400 break;
401 default:
402 break;
403 }
404
405 switch (net_check_prereq (protocol)) {
406 case 1:
407 /* network not configured */
408 eth_halt();
409 return (-1);
410
411 #ifdef CONFIG_NET_MULTI
412 case 2:
413 /* network device not configured */
414 break;
415 #endif /* CONFIG_NET_MULTI */
416
417 case 0:
418 #ifdef CONFIG_NET_MULTI
419 NetDevExists = 1;
420 #endif
421 switch (protocol) {
422 case TFTP:
423 /* always use ARP to get server ethernet address */
424 TftpStart();
425 break;
426
427 #if defined(CONFIG_CMD_DHCP)
428 case DHCP:
429 /* Start with a clean slate... */
430 BootpTry = 0;
431 NetOurIP = 0;
432 NetServerIP = getenv_IPaddr ("serverip");
433 DhcpRequest(); /* Basically same as BOOTP */
434 break;
435 #endif
436
437 case BOOTP:
438 BootpTry = 0;
439 BootpRequest ();
440 break;
441
442 case RARP:
443 RarpTry = 0;
444 RarpRequest ();
445 break;
446 #if defined(CONFIG_CMD_PING)
447 case PING:
448 PingStart();
449 break;
450 #endif
451 #if defined(CONFIG_CMD_NFS)
452 case NFS:
453 NfsStart();
454 break;
455 #endif
456 #if defined(CONFIG_CMD_CDP)
457 case CDP:
458 CDPStart();
459 break;
460 #endif
461 #ifdef CONFIG_NETCONSOLE
462 case NETCONS:
463 NcStart();
464 break;
465 #endif
466 #if defined(CONFIG_CMD_SNTP)
467 case SNTP:
468 SntpStart();
469 break;
470 #endif
471 default:
472 break;
473 }
474
475 NetBootFileXferSize = 0;
476 break;
477 }
478
479 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
480 #if defined(CFG_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
481 /*
482 * Echo the inverted link state to the fault LED.
483 */
484 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
485 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
486 } else {
487 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
488 }
489 #endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
490 #endif /* CONFIG_MII, ... */
491
492 /*
493 * Main packet reception loop. Loop receiving packets until
494 * someone sets `NetState' to a state that terminates.
495 */
496 for (;;) {
497 WATCHDOG_RESET();
498 #ifdef CONFIG_SHOW_ACTIVITY
499 {
500 extern void show_activity(int arg);
501 show_activity(1);
502 }
503 #endif
504 /*
505 * Check the ethernet for a new packet. The ethernet
506 * receive routine will process it.
507 */
508 eth_rx();
509
510 /*
511 * Abort if ctrl-c was pressed.
512 */
513 if (ctrlc()) {
514 eth_halt();
515 puts ("\nAbort\n");
516 return (-1);
517 }
518
519 ArpTimeoutCheck();
520
521 /*
522 * Check for a timeout, and run the timeout handler
523 * if we have one.
524 */
525 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
526 thand_f *x;
527
528 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
529 # if defined(CFG_FAULT_ECHO_LINK_DOWN) && \
530 defined(CONFIG_STATUS_LED) && \
531 defined(STATUS_LED_RED)
532 /*
533 * Echo the inverted link state to the fault LED.
534 */
535 if(miiphy_link(eth_get_dev()->name, CFG_FAULT_MII_ADDR)) {
536 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
537 } else {
538 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
539 }
540 # endif /* CFG_FAULT_ECHO_LINK_DOWN, ... */
541 #endif /* CONFIG_MII, ... */
542 x = timeHandler;
543 timeHandler = (thand_f *)0;
544 (*x)();
545 }
546
547
548 switch (NetState) {
549
550 case NETLOOP_RESTART:
551 #ifdef CONFIG_NET_MULTI
552 NetRestarted = 1;
553 #endif
554 goto restart;
555
556 case NETLOOP_SUCCESS:
557 if (NetBootFileXferSize > 0) {
558 char buf[20];
559 printf("Bytes transferred = %ld (%lx hex)\n",
560 NetBootFileXferSize,
561 NetBootFileXferSize);
562 sprintf(buf, "%lX", NetBootFileXferSize);
563 setenv("filesize", buf);
564
565 sprintf(buf, "%lX", (unsigned long)load_addr);
566 setenv("fileaddr", buf);
567 }
568 eth_halt();
569 return NetBootFileXferSize;
570
571 case NETLOOP_FAIL:
572 return (-1);
573 }
574 }
575 }
576
577 /**********************************************************************/
578
579 static void
580 startAgainTimeout(void)
581 {
582 NetState = NETLOOP_RESTART;
583 }
584
585 static void
586 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
587 {
588 /* Totally ignore the packet */
589 }
590
591 void NetStartAgain (void)
592 {
593 char *nretry;
594 int noretry = 0, once = 0;
595
596 if ((nretry = getenv ("netretry")) != NULL) {
597 noretry = (strcmp (nretry, "no") == 0);
598 once = (strcmp (nretry, "once") == 0);
599 }
600 if (noretry) {
601 eth_halt ();
602 NetState = NETLOOP_FAIL;
603 return;
604 }
605 #ifndef CONFIG_NET_MULTI
606 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout);
607 NetSetHandler (startAgainHandler);
608 #else /* !CONFIG_NET_MULTI*/
609 eth_halt ();
610 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
611 eth_try_another (!NetRestarted);
612 #endif
613 eth_init (gd->bd);
614 if (NetRestartWrap) {
615 NetRestartWrap = 0;
616 if (NetDevExists && !once) {
617 NetSetTimeout (10UL * CFG_HZ, startAgainTimeout);
618 NetSetHandler (startAgainHandler);
619 } else {
620 NetState = NETLOOP_FAIL;
621 }
622 } else {
623 NetState = NETLOOP_RESTART;
624 }
625 #endif /* CONFIG_NET_MULTI */
626 }
627
628 /**********************************************************************/
629 /*
630 * Miscelaneous bits.
631 */
632
633 void
634 NetSetHandler(rxhand_f * f)
635 {
636 packetHandler = f;
637 }
638
639
640 void
641 NetSetTimeout(ulong iv, thand_f * f)
642 {
643 if (iv == 0) {
644 timeHandler = (thand_f *)0;
645 } else {
646 timeHandler = f;
647 timeStart = get_timer(0);
648 timeDelta = iv;
649 }
650 }
651
652
653 void
654 NetSendPacket(volatile uchar * pkt, int len)
655 {
656 (void) eth_send(pkt, len);
657 }
658
659 int
660 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
661 {
662 uchar *pkt;
663
664 /* convert to new style broadcast */
665 if (dest == 0)
666 dest = 0xFFFFFFFF;
667
668 /* if broadcast, make the ether address a broadcast and don't do ARP */
669 if (dest == 0xFFFFFFFF)
670 ether = NetBcastAddr;
671
672 /* if MAC address was not discovered yet, save the packet and do an ARP request */
673 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
674
675 #ifdef ET_DEBUG
676 printf("sending ARP for %08lx\n", dest);
677 #endif
678 NetArpWaitPacketIP = dest;
679 NetArpWaitPacketMAC = ether;
680
681 pkt = NetArpWaitTxPacket;
682 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
683
684 NetSetIP (pkt, dest, dport, sport, len);
685 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
686
687 /* size of the waiting packet */
688 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
689
690 /* and do the ARP request */
691 NetArpWaitTry = 1;
692 NetArpWaitTimerStart = get_timer(0);
693 ArpRequest();
694 return 1; /* waiting */
695 }
696
697 #ifdef ET_DEBUG
698 printf("sending UDP to %08lx/%02x:%02x:%02x:%02x:%02x:%02x\n",
699 dest, ether[0], ether[1], ether[2], ether[3], ether[4], ether[5]);
700 #endif
701
702 pkt = (uchar *)NetTxPacket;
703 pkt += NetSetEther (pkt, ether, PROT_IP);
704 NetSetIP (pkt, dest, dport, sport, len);
705 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
706
707 return 0; /* transmitted */
708 }
709
710 #if defined(CONFIG_CMD_PING)
711 static ushort PingSeqNo;
712
713 int PingSend(void)
714 {
715 static uchar mac[6];
716 volatile IP_t *ip;
717 volatile ushort *s;
718 uchar *pkt;
719
720 /* XXX always send arp request */
721
722 memcpy(mac, NetEtherNullAddr, 6);
723
724 #ifdef ET_DEBUG
725 printf("sending ARP for %08lx\n", NetPingIP);
726 #endif
727
728 NetArpWaitPacketIP = NetPingIP;
729 NetArpWaitPacketMAC = mac;
730
731 pkt = NetArpWaitTxPacket;
732 pkt += NetSetEther(pkt, mac, PROT_IP);
733
734 ip = (volatile IP_t *)pkt;
735
736 /*
737 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
738 */
739 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
740 ip->ip_tos = 0;
741 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
742 ip->ip_id = htons(NetIPID++);
743 ip->ip_off = htons(0x4000); /* No fragmentation */
744 ip->ip_ttl = 255;
745 ip->ip_p = 0x01; /* ICMP */
746 ip->ip_sum = 0;
747 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
748 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
749 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
750
751 s = &ip->udp_src; /* XXX ICMP starts here */
752 s[0] = htons(0x0800); /* echo-request, code */
753 s[1] = 0; /* checksum */
754 s[2] = 0; /* identifier */
755 s[3] = htons(PingSeqNo++); /* sequence number */
756 s[1] = ~NetCksum((uchar *)s, 8/2);
757
758 /* size of the waiting packet */
759 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
760
761 /* and do the ARP request */
762 NetArpWaitTry = 1;
763 NetArpWaitTimerStart = get_timer(0);
764 ArpRequest();
765 return 1; /* waiting */
766 }
767
768 static void
769 PingTimeout (void)
770 {
771 eth_halt();
772 NetState = NETLOOP_FAIL; /* we did not get the reply */
773 }
774
775 static void
776 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
777 {
778 IPaddr_t tmp;
779 volatile IP_t *ip = (volatile IP_t *)pkt;
780
781 tmp = NetReadIP((void *)&ip->ip_src);
782 if (tmp != NetPingIP)
783 return;
784
785 NetState = NETLOOP_SUCCESS;
786 }
787
788 static void PingStart(void)
789 {
790 #if defined(CONFIG_NET_MULTI)
791 printf ("Using %s device\n", eth_get_name());
792 #endif /* CONFIG_NET_MULTI */
793 NetSetTimeout (10UL * CFG_HZ, PingTimeout);
794 NetSetHandler (PingHandler);
795
796 PingSend();
797 }
798 #endif
799
800 #if defined(CONFIG_CMD_CDP)
801
802 #define CDP_DEVICE_ID_TLV 0x0001
803 #define CDP_ADDRESS_TLV 0x0002
804 #define CDP_PORT_ID_TLV 0x0003
805 #define CDP_CAPABILITIES_TLV 0x0004
806 #define CDP_VERSION_TLV 0x0005
807 #define CDP_PLATFORM_TLV 0x0006
808 #define CDP_NATIVE_VLAN_TLV 0x000a
809 #define CDP_APPLIANCE_VLAN_TLV 0x000e
810 #define CDP_TRIGGER_TLV 0x000f
811 #define CDP_POWER_CONSUMPTION_TLV 0x0010
812 #define CDP_SYSNAME_TLV 0x0014
813 #define CDP_SYSOBJECT_TLV 0x0015
814 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
815
816 #define CDP_TIMEOUT (CFG_HZ/4) /* one packet every 250ms */
817
818 static int CDPSeq;
819 static int CDPOK;
820
821 ushort CDPNativeVLAN;
822 ushort CDPApplianceVLAN;
823
824 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
825
826 static ushort CDP_compute_csum(const uchar *buff, ushort len)
827 {
828 ushort csum;
829 int odd;
830 ulong result = 0;
831 ushort leftover;
832 ushort *p;
833
834 if (len > 0) {
835 odd = 1 & (ulong)buff;
836 if (odd) {
837 result = *buff << 8;
838 len--;
839 buff++;
840 }
841 while (len > 1) {
842 p = (ushort *)buff;
843 result += *p++;
844 buff = (uchar *)p;
845 if (result & 0x80000000)
846 result = (result & 0xFFFF) + (result >> 16);
847 len -= 2;
848 }
849 if (len) {
850 leftover = (signed short)(*(const signed char *)buff);
851 /* CISCO SUCKS big time! (and blows too):
852 * CDP uses the IP checksum algorithm with a twist;
853 * for the last byte it *sign* extends and sums.
854 */
855 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
856 }
857 while (result >> 16)
858 result = (result & 0xFFFF) + (result >> 16);
859
860 if (odd)
861 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
862 }
863
864 /* add up 16-bit and 17-bit words for 17+c bits */
865 result = (result & 0xffff) + (result >> 16);
866 /* add up 16-bit and 2-bit for 16+c bit */
867 result = (result & 0xffff) + (result >> 16);
868 /* add up carry.. */
869 result = (result & 0xffff) + (result >> 16);
870
871 /* negate */
872 csum = ~(ushort)result;
873
874 /* run time endian detection */
875 if (csum != htons(csum)) /* little endian */
876 csum = htons(csum);
877
878 return csum;
879 }
880
881 int CDPSendTrigger(void)
882 {
883 volatile uchar *pkt;
884 volatile ushort *s;
885 volatile ushort *cp;
886 Ethernet_t *et;
887 int len;
888 ushort chksum;
889 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
890 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
891 char buf[32];
892 #endif
893
894 pkt = NetTxPacket;
895 et = (Ethernet_t *)pkt;
896
897 /* NOTE: trigger sent not on any VLAN */
898
899 /* form ethernet header */
900 memcpy(et->et_dest, NetCDPAddr, 6);
901 memcpy(et->et_src, NetOurEther, 6);
902
903 pkt += ETHER_HDR_SIZE;
904
905 /* SNAP header */
906 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
907 pkt += sizeof(CDP_SNAP_hdr);
908
909 /* CDP header */
910 *pkt++ = 0x02; /* CDP version 2 */
911 *pkt++ = 180; /* TTL */
912 s = (volatile ushort *)pkt;
913 cp = s;
914 *s++ = htons(0); /* checksum (0 for later calculation) */
915
916 /* CDP fields */
917 #ifdef CONFIG_CDP_DEVICE_ID
918 *s++ = htons(CDP_DEVICE_ID_TLV);
919 *s++ = htons(CONFIG_CDP_DEVICE_ID);
920 memset(buf, 0, sizeof(buf));
921 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%02X%02X%02X%02X%02X%02X",
922 NetOurEther[0] & 0xff, NetOurEther[1] & 0xff,
923 NetOurEther[2] & 0xff, NetOurEther[3] & 0xff,
924 NetOurEther[4] & 0xff, NetOurEther[5] & 0xff);
925 memcpy((uchar *)s, buf, 16);
926 s += 16 / 2;
927 #endif
928
929 #ifdef CONFIG_CDP_PORT_ID
930 *s++ = htons(CDP_PORT_ID_TLV);
931 memset(buf, 0, sizeof(buf));
932 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
933 len = strlen(buf);
934 if (len & 1) /* make it even */
935 len++;
936 *s++ = htons(len + 4);
937 memcpy((uchar *)s, buf, len);
938 s += len / 2;
939 #endif
940
941 #ifdef CONFIG_CDP_CAPABILITIES
942 *s++ = htons(CDP_CAPABILITIES_TLV);
943 *s++ = htons(8);
944 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
945 s += 2;
946 #endif
947
948 #ifdef CONFIG_CDP_VERSION
949 *s++ = htons(CDP_VERSION_TLV);
950 memset(buf, 0, sizeof(buf));
951 strcpy(buf, CONFIG_CDP_VERSION);
952 len = strlen(buf);
953 if (len & 1) /* make it even */
954 len++;
955 *s++ = htons(len + 4);
956 memcpy((uchar *)s, buf, len);
957 s += len / 2;
958 #endif
959
960 #ifdef CONFIG_CDP_PLATFORM
961 *s++ = htons(CDP_PLATFORM_TLV);
962 memset(buf, 0, sizeof(buf));
963 strcpy(buf, CONFIG_CDP_PLATFORM);
964 len = strlen(buf);
965 if (len & 1) /* make it even */
966 len++;
967 *s++ = htons(len + 4);
968 memcpy((uchar *)s, buf, len);
969 s += len / 2;
970 #endif
971
972 #ifdef CONFIG_CDP_TRIGGER
973 *s++ = htons(CDP_TRIGGER_TLV);
974 *s++ = htons(8);
975 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
976 s += 2;
977 #endif
978
979 #ifdef CONFIG_CDP_POWER_CONSUMPTION
980 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
981 *s++ = htons(6);
982 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
983 #endif
984
985 /* length of ethernet packet */
986 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
987 et->et_protlen = htons(len);
988
989 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
990 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
991 if (chksum == 0)
992 chksum = 0xFFFF;
993 *cp = htons(chksum);
994
995 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
996 return 0;
997 }
998
999 static void
1000 CDPTimeout (void)
1001 {
1002 CDPSeq++;
1003
1004 if (CDPSeq < 3) {
1005 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1006 CDPSendTrigger();
1007 return;
1008 }
1009
1010 /* if not OK try again */
1011 if (!CDPOK)
1012 NetStartAgain();
1013 else
1014 NetState = NETLOOP_SUCCESS;
1015 }
1016
1017 static void
1018 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
1019 {
1020 /* nothing */
1021 }
1022
1023 static void
1024 CDPHandler(const uchar * pkt, unsigned len)
1025 {
1026 const uchar *t;
1027 const ushort *ss;
1028 ushort type, tlen;
1029 uchar applid;
1030 ushort vlan, nvlan;
1031
1032 /* minimum size? */
1033 if (len < sizeof(CDP_SNAP_hdr) + 4)
1034 goto pkt_short;
1035
1036 /* check for valid CDP SNAP header */
1037 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1038 return;
1039
1040 pkt += sizeof(CDP_SNAP_hdr);
1041 len -= sizeof(CDP_SNAP_hdr);
1042
1043 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1044 if (pkt[0] < 0x02 || pkt[1] == 0)
1045 return;
1046
1047 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1048 if (pkt[0] != 0x02)
1049 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1050 pkt[0] & 0xff);
1051
1052 if (CDP_compute_csum(pkt, len) != 0)
1053 return;
1054
1055 pkt += 4;
1056 len -= 4;
1057
1058 vlan = htons(-1);
1059 nvlan = htons(-1);
1060 while (len > 0) {
1061 if (len < 4)
1062 goto pkt_short;
1063
1064 ss = (const ushort *)pkt;
1065 type = ntohs(ss[0]);
1066 tlen = ntohs(ss[1]);
1067 if (tlen > len) {
1068 goto pkt_short;
1069 }
1070
1071 pkt += tlen;
1072 len -= tlen;
1073
1074 ss += 2; /* point ss to the data of the TLV */
1075 tlen -= 4;
1076
1077 switch (type) {
1078 case CDP_DEVICE_ID_TLV:
1079 break;
1080 case CDP_ADDRESS_TLV:
1081 break;
1082 case CDP_PORT_ID_TLV:
1083 break;
1084 case CDP_CAPABILITIES_TLV:
1085 break;
1086 case CDP_VERSION_TLV:
1087 break;
1088 case CDP_PLATFORM_TLV:
1089 break;
1090 case CDP_NATIVE_VLAN_TLV:
1091 nvlan = *ss;
1092 break;
1093 case CDP_APPLIANCE_VLAN_TLV:
1094 t = (const uchar *)ss;
1095 while (tlen > 0) {
1096 if (tlen < 3)
1097 goto pkt_short;
1098
1099 applid = t[0];
1100 ss = (const ushort *)(t + 1);
1101
1102 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1103 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1104 vlan = *ss;
1105 #else
1106 vlan = ntohs(*ss); /* XXX will this work; dunno */
1107 #endif
1108 t += 3; tlen -= 3;
1109 }
1110 break;
1111 case CDP_TRIGGER_TLV:
1112 break;
1113 case CDP_POWER_CONSUMPTION_TLV:
1114 break;
1115 case CDP_SYSNAME_TLV:
1116 break;
1117 case CDP_SYSOBJECT_TLV:
1118 break;
1119 case CDP_MANAGEMENT_ADDRESS_TLV:
1120 break;
1121 }
1122 }
1123
1124 CDPApplianceVLAN = vlan;
1125 CDPNativeVLAN = nvlan;
1126
1127 CDPOK = 1;
1128 return;
1129
1130 pkt_short:
1131 printf("** CDP packet is too short\n");
1132 return;
1133 }
1134
1135 static void CDPStart(void)
1136 {
1137 #if defined(CONFIG_NET_MULTI)
1138 printf ("Using %s device\n", eth_get_name());
1139 #endif
1140 CDPSeq = 0;
1141 CDPOK = 0;
1142
1143 CDPNativeVLAN = htons(-1);
1144 CDPApplianceVLAN = htons(-1);
1145
1146 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1147 NetSetHandler (CDPDummyHandler);
1148
1149 CDPSendTrigger();
1150 }
1151 #endif
1152
1153
1154 void
1155 NetReceive(volatile uchar * inpkt, int len)
1156 {
1157 Ethernet_t *et;
1158 IP_t *ip;
1159 ARP_t *arp;
1160 IPaddr_t tmp;
1161 int x;
1162 uchar *pkt;
1163 #if defined(CONFIG_CMD_CDP)
1164 int iscdp;
1165 #endif
1166 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1167
1168 #ifdef ET_DEBUG
1169 printf("packet received\n");
1170 #endif
1171
1172 NetRxPkt = inpkt;
1173 NetRxPktLen = len;
1174 et = (Ethernet_t *)inpkt;
1175
1176 /* too small packet? */
1177 if (len < ETHER_HDR_SIZE)
1178 return;
1179
1180 #ifdef CONFIG_API
1181 if (push_packet) {
1182 (*push_packet)(inpkt, len);
1183 return;
1184 }
1185 #endif
1186
1187 #if defined(CONFIG_CMD_CDP)
1188 /* keep track if packet is CDP */
1189 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1190 #endif
1191
1192 myvlanid = ntohs(NetOurVLAN);
1193 if (myvlanid == (ushort)-1)
1194 myvlanid = VLAN_NONE;
1195 mynvlanid = ntohs(NetOurNativeVLAN);
1196 if (mynvlanid == (ushort)-1)
1197 mynvlanid = VLAN_NONE;
1198
1199 x = ntohs(et->et_protlen);
1200
1201 #ifdef ET_DEBUG
1202 printf("packet received\n");
1203 #endif
1204
1205 if (x < 1514) {
1206 /*
1207 * Got a 802 packet. Check the other protocol field.
1208 */
1209 x = ntohs(et->et_prot);
1210
1211 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1212 len -= E802_HDR_SIZE;
1213
1214 } else if (x != PROT_VLAN) { /* normal packet */
1215 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1216 len -= ETHER_HDR_SIZE;
1217
1218 } else { /* VLAN packet */
1219 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1220
1221 #ifdef ET_DEBUG
1222 printf("VLAN packet received\n");
1223 #endif
1224 /* too small packet? */
1225 if (len < VLAN_ETHER_HDR_SIZE)
1226 return;
1227
1228 /* if no VLAN active */
1229 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1230 #if defined(CONFIG_CMD_CDP)
1231 && iscdp == 0
1232 #endif
1233 )
1234 return;
1235
1236 cti = ntohs(vet->vet_tag);
1237 vlanid = cti & VLAN_IDMASK;
1238 x = ntohs(vet->vet_type);
1239
1240 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1241 len -= VLAN_ETHER_HDR_SIZE;
1242 }
1243
1244 #ifdef ET_DEBUG
1245 printf("Receive from protocol 0x%x\n", x);
1246 #endif
1247
1248 #if defined(CONFIG_CMD_CDP)
1249 if (iscdp) {
1250 CDPHandler((uchar *)ip, len);
1251 return;
1252 }
1253 #endif
1254
1255 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1256 if (vlanid == VLAN_NONE)
1257 vlanid = (mynvlanid & VLAN_IDMASK);
1258 /* not matched? */
1259 if (vlanid != (myvlanid & VLAN_IDMASK))
1260 return;
1261 }
1262
1263 switch (x) {
1264
1265 case PROT_ARP:
1266 /*
1267 * We have to deal with two types of ARP packets:
1268 * - REQUEST packets will be answered by sending our
1269 * IP address - if we know it.
1270 * - REPLY packates are expected only after we asked
1271 * for the TFTP server's or the gateway's ethernet
1272 * address; so if we receive such a packet, we set
1273 * the server ethernet address
1274 */
1275 #ifdef ET_DEBUG
1276 puts ("Got ARP\n");
1277 #endif
1278 arp = (ARP_t *)ip;
1279 if (len < ARP_HDR_SIZE) {
1280 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1281 return;
1282 }
1283 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1284 return;
1285 }
1286 if (ntohs(arp->ar_pro) != PROT_IP) {
1287 return;
1288 }
1289 if (arp->ar_hln != 6) {
1290 return;
1291 }
1292 if (arp->ar_pln != 4) {
1293 return;
1294 }
1295
1296 if (NetOurIP == 0) {
1297 return;
1298 }
1299
1300 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1301 return;
1302 }
1303
1304 switch (ntohs(arp->ar_op)) {
1305 case ARPOP_REQUEST: /* reply with our IP address */
1306 #ifdef ET_DEBUG
1307 puts ("Got ARP REQUEST, return our IP\n");
1308 #endif
1309 pkt = (uchar *)et;
1310 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1311 arp->ar_op = htons(ARPOP_REPLY);
1312 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1313 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1314 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1315 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1316 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1317 return;
1318
1319 case ARPOP_REPLY: /* arp reply */
1320 /* are we waiting for a reply */
1321 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1322 break;
1323 #ifdef ET_DEBUG
1324 printf("Got ARP REPLY, set server/gtwy eth addr (%02x:%02x:%02x:%02x:%02x:%02x)\n",
1325 arp->ar_data[0], arp->ar_data[1],
1326 arp->ar_data[2], arp->ar_data[3],
1327 arp->ar_data[4], arp->ar_data[5]);
1328 #endif
1329
1330 tmp = NetReadIP(&arp->ar_data[6]);
1331
1332 /* matched waiting packet's address */
1333 if (tmp == NetArpWaitReplyIP) {
1334 #ifdef ET_DEBUG
1335 puts ("Got it\n");
1336 #endif
1337 /* save address for later use */
1338 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1339
1340 #ifdef CONFIG_NETCONSOLE
1341 (*packetHandler)(0,0,0,0);
1342 #endif
1343 /* modify header, and transmit it */
1344 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1345 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1346
1347 /* no arp request pending now */
1348 NetArpWaitPacketIP = 0;
1349 NetArpWaitTxPacketSize = 0;
1350 NetArpWaitPacketMAC = NULL;
1351
1352 }
1353 return;
1354 default:
1355 #ifdef ET_DEBUG
1356 printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1357 #endif
1358 return;
1359 }
1360 break;
1361
1362 case PROT_RARP:
1363 #ifdef ET_DEBUG
1364 puts ("Got RARP\n");
1365 #endif
1366 arp = (ARP_t *)ip;
1367 if (len < ARP_HDR_SIZE) {
1368 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1369 return;
1370 }
1371
1372 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1373 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1374 (ntohs(arp->ar_pro) != PROT_IP) ||
1375 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1376
1377 puts ("invalid RARP header\n");
1378 } else {
1379 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1380 if (NetServerIP == 0)
1381 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1382 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1383
1384 (*packetHandler)(0,0,0,0);
1385 }
1386 break;
1387
1388 case PROT_IP:
1389 #ifdef ET_DEBUG
1390 puts ("Got IP\n");
1391 #endif
1392 if (len < IP_HDR_SIZE) {
1393 debug ("len bad %d < %d\n", len, IP_HDR_SIZE);
1394 return;
1395 }
1396 if (len < ntohs(ip->ip_len)) {
1397 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1398 return;
1399 }
1400 len = ntohs(ip->ip_len);
1401 #ifdef ET_DEBUG
1402 printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1403 #endif
1404 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1405 return;
1406 }
1407 if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */
1408 return;
1409 }
1410 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1411 puts ("checksum bad\n");
1412 return;
1413 }
1414 tmp = NetReadIP(&ip->ip_dst);
1415 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1416 #ifdef CONFIG_MCAST_TFTP
1417 if (Mcast_addr != tmp)
1418 #endif
1419 return;
1420 }
1421 /*
1422 * watch for ICMP host redirects
1423 *
1424 * There is no real handler code (yet). We just watch
1425 * for ICMP host redirect messages. In case anybody
1426 * sees these messages: please contact me
1427 * (wd@denx.de), or - even better - send me the
1428 * necessary fixes :-)
1429 *
1430 * Note: in all cases where I have seen this so far
1431 * it was a problem with the router configuration,
1432 * for instance when a router was configured in the
1433 * BOOTP reply, but the TFTP server was on the same
1434 * subnet. So this is probably a warning that your
1435 * configuration might be wrong. But I'm not really
1436 * sure if there aren't any other situations.
1437 */
1438 if (ip->ip_p == IPPROTO_ICMP) {
1439 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1440
1441 switch (icmph->type) {
1442 case ICMP_REDIRECT:
1443 if (icmph->code != ICMP_REDIR_HOST)
1444 return;
1445 puts (" ICMP Host Redirect to ");
1446 print_IPaddr(icmph->un.gateway);
1447 putc(' ');
1448 return;
1449 #if defined(CONFIG_CMD_PING)
1450 case ICMP_ECHO_REPLY:
1451 /*
1452 * IP header OK. Pass the packet to the current handler.
1453 */
1454 /* XXX point to ip packet */
1455 (*packetHandler)((uchar *)ip, 0, 0, 0);
1456 return;
1457 case ICMP_ECHO_REQUEST:
1458 #ifdef ET_DEBUG
1459 printf ("Got ICMP ECHO REQUEST, return %d bytes \n",
1460 ETHER_HDR_SIZE + len);
1461 #endif
1462 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1463 memcpy (&et->et_src[ 0], NetOurEther, 6);
1464
1465 ip->ip_sum = 0;
1466 ip->ip_off = 0;
1467 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1468 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1469 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1470
1471 icmph->type = ICMP_ECHO_REPLY;
1472 icmph->checksum = 0;
1473 icmph->checksum = ~NetCksum((uchar *)icmph,
1474 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1475 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1476 return;
1477 #endif
1478 default:
1479 return;
1480 }
1481 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1482 return;
1483 }
1484
1485 #ifdef CONFIG_UDP_CHECKSUM
1486 if (ip->udp_xsum != 0) {
1487 ulong xsum;
1488 ushort *sumptr;
1489 ushort sumlen;
1490
1491 xsum = ip->ip_p;
1492 xsum += (ntohs(ip->udp_len));
1493 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1494 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1495 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1496 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1497
1498 sumlen = ntohs(ip->udp_len);
1499 sumptr = (ushort *) &(ip->udp_src);
1500
1501 while (sumlen > 1) {
1502 ushort sumdata;
1503
1504 sumdata = *sumptr++;
1505 xsum += ntohs(sumdata);
1506 sumlen -= 2;
1507 }
1508 if (sumlen > 0) {
1509 ushort sumdata;
1510
1511 sumdata = *(unsigned char *) sumptr;
1512 sumdata = (sumdata << 8) & 0xff00;
1513 xsum += sumdata;
1514 }
1515 while ((xsum >> 16) != 0) {
1516 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1517 }
1518 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1519 printf(" UDP wrong checksum %08x %08x\n", xsum, ntohs(ip->udp_xsum));
1520 return;
1521 }
1522 }
1523 #endif
1524
1525
1526 #ifdef CONFIG_NETCONSOLE
1527 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1528 ntohs(ip->udp_dst),
1529 ntohs(ip->udp_src),
1530 ntohs(ip->udp_len) - 8);
1531 #endif
1532 /*
1533 * IP header OK. Pass the packet to the current handler.
1534 */
1535 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1536 ntohs(ip->udp_dst),
1537 ntohs(ip->udp_src),
1538 ntohs(ip->udp_len) - 8);
1539 break;
1540 }
1541 }
1542
1543
1544 /**********************************************************************/
1545
1546 static int net_check_prereq (proto_t protocol)
1547 {
1548 switch (protocol) {
1549 /* Fall through */
1550 #if defined(CONFIG_CMD_PING)
1551 case PING:
1552 if (NetPingIP == 0) {
1553 puts ("*** ERROR: ping address not given\n");
1554 return (1);
1555 }
1556 goto common;
1557 #endif
1558 #if defined(CONFIG_CMD_SNTP)
1559 case SNTP:
1560 if (NetNtpServerIP == 0) {
1561 puts ("*** ERROR: NTP server address not given\n");
1562 return (1);
1563 }
1564 goto common;
1565 #endif
1566 #if defined(CONFIG_CMD_NFS)
1567 case NFS:
1568 #endif
1569 case NETCONS:
1570 case TFTP:
1571 if (NetServerIP == 0) {
1572 puts ("*** ERROR: `serverip' not set\n");
1573 return (1);
1574 }
1575 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1576 common:
1577 #endif
1578
1579 if (NetOurIP == 0) {
1580 puts ("*** ERROR: `ipaddr' not set\n");
1581 return (1);
1582 }
1583 /* Fall through */
1584
1585 case DHCP:
1586 case RARP:
1587 case BOOTP:
1588 case CDP:
1589 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1590 #ifdef CONFIG_NET_MULTI
1591 extern int eth_get_dev_index (void);
1592 int num = eth_get_dev_index ();
1593
1594 switch (num) {
1595 case -1:
1596 puts ("*** ERROR: No ethernet found.\n");
1597 return (1);
1598 case 0:
1599 puts ("*** ERROR: `ethaddr' not set\n");
1600 break;
1601 default:
1602 printf ("*** ERROR: `eth%daddr' not set\n",
1603 num);
1604 break;
1605 }
1606
1607 NetStartAgain ();
1608 return (2);
1609 #else
1610 puts ("*** ERROR: `ethaddr' not set\n");
1611 return (1);
1612 #endif
1613 }
1614 /* Fall through */
1615 default:
1616 return (0);
1617 }
1618 return (0); /* OK */
1619 }
1620 /**********************************************************************/
1621
1622 int
1623 NetCksumOk(uchar * ptr, int len)
1624 {
1625 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1626 }
1627
1628
1629 unsigned
1630 NetCksum(uchar * ptr, int len)
1631 {
1632 ulong xsum;
1633 ushort *p = (ushort *)ptr;
1634
1635 xsum = 0;
1636 while (len-- > 0)
1637 xsum += *p++;
1638 xsum = (xsum & 0xffff) + (xsum >> 16);
1639 xsum = (xsum & 0xffff) + (xsum >> 16);
1640 return (xsum & 0xffff);
1641 }
1642
1643 int
1644 NetEthHdrSize(void)
1645 {
1646 ushort myvlanid;
1647
1648 myvlanid = ntohs(NetOurVLAN);
1649 if (myvlanid == (ushort)-1)
1650 myvlanid = VLAN_NONE;
1651
1652 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1653 }
1654
1655 int
1656 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1657 {
1658 Ethernet_t *et = (Ethernet_t *)xet;
1659 ushort myvlanid;
1660
1661 myvlanid = ntohs(NetOurVLAN);
1662 if (myvlanid == (ushort)-1)
1663 myvlanid = VLAN_NONE;
1664
1665 memcpy (et->et_dest, addr, 6);
1666 memcpy (et->et_src, NetOurEther, 6);
1667 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1668 et->et_protlen = htons(prot);
1669 return ETHER_HDR_SIZE;
1670 } else {
1671 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1672
1673 vet->vet_vlan_type = htons(PROT_VLAN);
1674 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1675 vet->vet_type = htons(prot);
1676 return VLAN_ETHER_HDR_SIZE;
1677 }
1678 }
1679
1680 void
1681 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1682 {
1683 volatile IP_t *ip = (IP_t *)xip;
1684
1685 /*
1686 * If the data is an odd number of bytes, zero the
1687 * byte after the last byte so that the checksum
1688 * will work.
1689 */
1690 if (len & 1)
1691 xip[IP_HDR_SIZE + len] = 0;
1692
1693 /*
1694 * Construct an IP and UDP header.
1695 * (need to set no fragment bit - XXX)
1696 */
1697 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1698 ip->ip_tos = 0;
1699 ip->ip_len = htons(IP_HDR_SIZE + len);
1700 ip->ip_id = htons(NetIPID++);
1701 ip->ip_off = htons(0x4000); /* No fragmentation */
1702 ip->ip_ttl = 255;
1703 ip->ip_p = 17; /* UDP */
1704 ip->ip_sum = 0;
1705 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1706 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1707 ip->udp_src = htons(sport);
1708 ip->udp_dst = htons(dport);
1709 ip->udp_len = htons(8 + len);
1710 ip->udp_xsum = 0;
1711 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1712 }
1713
1714 void copy_filename (char *dst, char *src, int size)
1715 {
1716 if (*src && (*src == '"')) {
1717 ++src;
1718 --size;
1719 }
1720
1721 while ((--size > 0) && *src && (*src != '"')) {
1722 *dst++ = *src++;
1723 }
1724 *dst = '\0';
1725 }
1726
1727 #endif
1728
1729 void ip_to_string (IPaddr_t x, char *s)
1730 {
1731 x = ntohl (x);
1732 sprintf (s, "%d.%d.%d.%d",
1733 (int) ((x >> 24) & 0xff),
1734 (int) ((x >> 16) & 0xff),
1735 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1736 );
1737 }
1738
1739 IPaddr_t string_to_ip(char *s)
1740 {
1741 IPaddr_t addr;
1742 char *e;
1743 int i;
1744
1745 if (s == NULL)
1746 return(0);
1747
1748 for (addr=0, i=0; i<4; ++i) {
1749 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1750 addr <<= 8;
1751 addr |= (val & 0xFF);
1752 if (s) {
1753 s = (*e) ? e+1 : e;
1754 }
1755 }
1756
1757 return (htonl(addr));
1758 }
1759
1760 void VLAN_to_string(ushort x, char *s)
1761 {
1762 x = ntohs(x);
1763
1764 if (x == (ushort)-1)
1765 x = VLAN_NONE;
1766
1767 if (x == VLAN_NONE)
1768 strcpy(s, "none");
1769 else
1770 sprintf(s, "%d", x & VLAN_IDMASK);
1771 }
1772
1773 ushort string_to_VLAN(char *s)
1774 {
1775 ushort id;
1776
1777 if (s == NULL)
1778 return htons(VLAN_NONE);
1779
1780 if (*s < '0' || *s > '9')
1781 id = VLAN_NONE;
1782 else
1783 id = (ushort)simple_strtoul(s, NULL, 10);
1784
1785 return htons(id);
1786 }
1787
1788 void print_IPaddr (IPaddr_t x)
1789 {
1790 char tmp[16];
1791
1792 ip_to_string (x, tmp);
1793
1794 puts (tmp);
1795 }
1796
1797 IPaddr_t getenv_IPaddr (char *var)
1798 {
1799 return (string_to_ip(getenv(var)));
1800 }
1801
1802 ushort getenv_VLAN(char *var)
1803 {
1804 return (string_to_VLAN(getenv(var)));
1805 }
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