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