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