]> git.ipfire.org Git - people/ms/u-boot.git/blob - net/net.c
projects / people / ms / u-boot.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
USB add macros for debugging usb device setup.
[people/ms/u-boot.git] / net / net.c
1 /*
2 * Copied from Linux Monitor (LiMon) - Networking.
3 *
4 * Copyright 1994 - 2000 Neil Russell.
5 * (See License)
6 * Copyright 2000 Roland Borde
7 * Copyright 2000 Paolo Scaffardi
8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de
9 */
10
11 /*
12 * General Desription:
13 *
14 * The user interface supports commands for BOOTP, RARP, and TFTP.
15 * Also, we support ARP internally. Depending on available data,
16 * these interact as follows:
17 *
18 * BOOTP:
19 *
20 * Prerequisites: - own ethernet address
21 * We want: - own IP address
22 * - TFTP server IP address
23 * - name of bootfile
24 * Next step: ARP
25 *
26 * RARP:
27 *
28 * Prerequisites: - own ethernet address
29 * We want: - own IP address
30 * - TFTP server IP address
31 * Next step: ARP
32 *
33 * ARP:
34 *
35 * Prerequisites: - own ethernet address
36 * - own IP address
37 * - TFTP server IP address
38 * We want: - TFTP server ethernet address
39 * Next step: TFTP
40 *
41 * DHCP:
42 *
43 * Prerequisites: - own ethernet address
44 * We want: - IP, Netmask, ServerIP, Gateway IP
45 * - bootfilename, lease time
46 * Next step: - TFTP
47 *
48 * TFTP:
49 *
50 * Prerequisites: - own ethernet address
51 * - own IP address
52 * - TFTP server IP address
53 * - TFTP server ethernet address
54 * - name of bootfile (if unknown, we use a default name
55 * derived from our own IP address)
56 * We want: - load the boot file
57 * Next step: none
58 *
59 * NFS:
60 *
61 * Prerequisites: - own ethernet address
62 * - own IP address
63 * - name of bootfile (if unknown, we use a default name
64 * derived from our own IP address)
65 * We want: - load the boot file
66 * Next step: none
67 *
68 * SNTP:
69 *
70 * Prerequisites: - own ethernet address
71 * - own IP address
72 * We want: - network time
73 * Next step: none
74 */
75
76
77 #include <common.h>
78 #include <watchdog.h>
79 #include <command.h>
80 #include <net.h>
81 #include "bootp.h"
82 #include "tftp.h"
83 #include "rarp.h"
84 #include "nfs.h"
85 #ifdef CONFIG_STATUS_LED
86 #include <status_led.h>
87 #include <miiphy.h>
88 #endif
89 #if defined(CONFIG_CMD_SNTP)
90 #include "sntp.h"
91 #endif
92 #if defined(CONFIG_CDP_VERSION)
93 #include <timestamp.h>
94 #endif
95 #if defined(CONFIG_CMD_DNS)
96 #include "dns.h"
97 #endif
98
99 #if defined(CONFIG_CMD_NET)
100
101 DECLARE_GLOBAL_DATA_PTR;
102
103 #ifndef CONFIG_ARP_TIMEOUT
104 # define ARP_TIMEOUT 5000UL /* Milliseconds before trying ARP again */
105 #else
106 # define ARP_TIMEOUT CONFIG_ARP_TIMEOUT
107 #endif
108
109
110 #ifndef CONFIG_NET_RETRY_COUNT
111 # define ARP_TIMEOUT_COUNT 5 /* # of timeouts before giving up */
112 #else
113 # define ARP_TIMEOUT_COUNT CONFIG_NET_RETRY_COUNT
114 #endif
115
116 /** BOOTP EXTENTIONS **/
117
118 IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */
119 IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */
120 IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */
121 #if defined(CONFIG_BOOTP_DNS2)
122 IPaddr_t NetOurDNS2IP=0; /* Our 2nd DNS IP address */
123 #endif
124 char NetOurNISDomain[32]={0,}; /* Our NIS domain */
125 char NetOurHostName[32]={0,}; /* Our hostname */
126 char NetOurRootPath[64]={0,}; /* Our bootpath */
127 ushort NetBootFileSize=0; /* Our bootfile size in blocks */
128
129 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
130 IPaddr_t Mcast_addr;
131 #endif
132
133 /** END OF BOOTP EXTENTIONS **/
134
135 ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */
136 uchar NetOurEther[6]; /* Our ethernet address */
137 uchar NetServerEther[6] = /* Boot server enet address */
138 { 0, 0, 0, 0, 0, 0 };
139 IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */
140 IPaddr_t NetServerIP; /* Server IP addr (0 = unknown) */
141 volatile uchar *NetRxPacket; /* Current receive packet */
142 int NetRxPacketLen; /* Current rx packet length */
143 unsigned NetIPID; /* IP packet ID */
144 uchar NetBcastAddr[6] = /* Ethernet bcast address */
145 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
146 uchar NetEtherNullAddr[6] =
147 { 0, 0, 0, 0, 0, 0 };
148 #ifdef CONFIG_API
149 void (*push_packet)(volatile void *, int len) = 0;
150 #endif
151 #if defined(CONFIG_CMD_CDP)
152 uchar NetCDPAddr[6] = /* Ethernet bcast address */
153 { 0x01, 0x00, 0x0c, 0xcc, 0xcc, 0xcc };
154 #endif
155 int NetState; /* Network loop state */
156 #ifdef CONFIG_NET_MULTI
157 int NetRestartWrap = 0; /* Tried all network devices */
158 static int NetRestarted = 0; /* Network loop restarted */
159 static int NetDevExists = 0; /* At least one device configured */
160 #endif
161
162 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
163 ushort NetOurVLAN = 0xFFFF; /* default is without VLAN */
164 ushort NetOurNativeVLAN = 0xFFFF; /* ditto */
165
166 char BootFile[128]; /* Boot File name */
167
168 #if defined(CONFIG_CMD_PING)
169 IPaddr_t NetPingIP; /* the ip address to ping */
170
171 static void PingStart(void);
172 #endif
173
174 #if defined(CONFIG_CMD_CDP)
175 static void CDPStart(void);
176 #endif
177
178 #if defined(CONFIG_CMD_SNTP)
179 IPaddr_t NetNtpServerIP; /* NTP server IP address */
180 int NetTimeOffset=0; /* offset time from UTC */
181 #endif
182
183 #ifdef CONFIG_NETCONSOLE
184 void NcStart(void);
185 int nc_input_packet(uchar *pkt, unsigned dest, unsigned src, unsigned len);
186 #endif
187
188 volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
189
190 volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */
191
192 static rxhand_f *packetHandler; /* Current RX packet handler */
193 static thand_f *timeHandler; /* Current timeout handler */
194 static ulong timeStart; /* Time base value */
195 static ulong timeDelta; /* Current timeout value */
196 volatile uchar *NetTxPacket = 0; /* THE transmit packet */
197
198 static int net_check_prereq (proto_t protocol);
199
200 static int NetTryCount;
201
202 /**********************************************************************/
203
204 IPaddr_t NetArpWaitPacketIP;
205 IPaddr_t NetArpWaitReplyIP;
206 uchar *NetArpWaitPacketMAC; /* MAC address of waiting packet's destination */
207 uchar *NetArpWaitTxPacket; /* THE transmit packet */
208 int NetArpWaitTxPacketSize;
209 uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
210 ulong NetArpWaitTimerStart;
211 int NetArpWaitTry;
212
213 void ArpRequest (void)
214 {
215 int i;
216 volatile uchar *pkt;
217 ARP_t *arp;
218
219 debug("ARP broadcast %d\n", NetArpWaitTry);
220
221 pkt = NetTxPacket;
222
223 pkt += NetSetEther (pkt, NetBcastAddr, PROT_ARP);
224
225 arp = (ARP_t *) pkt;
226
227 arp->ar_hrd = htons (ARP_ETHER);
228 arp->ar_pro = htons (PROT_IP);
229 arp->ar_hln = 6;
230 arp->ar_pln = 4;
231 arp->ar_op = htons (ARPOP_REQUEST);
232
233 memcpy (&arp->ar_data[0], NetOurEther, 6); /* source ET addr */
234 NetWriteIP ((uchar *) & arp->ar_data[6], NetOurIP); /* source IP addr */
235 for (i = 10; i < 16; ++i) {
236 arp->ar_data[i] = 0; /* dest ET addr = 0 */
237 }
238
239 if ((NetArpWaitPacketIP & NetOurSubnetMask) !=
240 (NetOurIP & NetOurSubnetMask)) {
241 if (NetOurGatewayIP == 0) {
242 puts ("## Warning: gatewayip needed but not set\n");
243 NetArpWaitReplyIP = NetArpWaitPacketIP;
244 } else {
245 NetArpWaitReplyIP = NetOurGatewayIP;
246 }
247 } else {
248 NetArpWaitReplyIP = NetArpWaitPacketIP;
249 }
250
251 NetWriteIP ((uchar *) & arp->ar_data[16], NetArpWaitReplyIP);
252 (void) eth_send (NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
253 }
254
255 void ArpTimeoutCheck(void)
256 {
257 ulong t;
258
259 if (!NetArpWaitPacketIP)
260 return;
261
262 t = get_timer(0);
263
264 /* check for arp timeout */
265 if ((t - NetArpWaitTimerStart) > ARP_TIMEOUT) {
266 NetArpWaitTry++;
267
268 if (NetArpWaitTry >= ARP_TIMEOUT_COUNT) {
269 puts ("\nARP Retry count exceeded; starting again\n");
270 NetArpWaitTry = 0;
271 NetStartAgain();
272 } else {
273 NetArpWaitTimerStart = t;
274 ArpRequest();
275 }
276 }
277 }
278
279 static void
280 NetInitLoop(proto_t protocol)
281 {
282 static int env_changed_id = 0;
283 bd_t *bd = gd->bd;
284 int env_id = get_env_id ();
285
286 /* update only when the environment has changed */
287 if (env_changed_id != env_id) {
288 NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
289 NetOurGatewayIP = getenv_IPaddr ("gatewayip");
290 NetOurSubnetMask= getenv_IPaddr ("netmask");
291 NetServerIP = getenv_IPaddr ("serverip");
292 NetOurNativeVLAN = getenv_VLAN("nvlan");
293 NetOurVLAN = getenv_VLAN("vlan");
294 #if defined(CONFIG_CMD_DNS)
295 NetOurDNSIP = getenv_IPaddr("dnsip");
296 #endif
297 env_changed_id = env_id;
298 }
299
300 return;
301 }
302
303 /**********************************************************************/
304 /*
305 * Main network processing loop.
306 */
307
308 int
309 NetLoop(proto_t protocol)
310 {
311 bd_t *bd = gd->bd;
312
313 #ifdef CONFIG_NET_MULTI
314 NetRestarted = 0;
315 NetDevExists = 0;
316 #endif
317
318 /* XXX problem with bss workaround */
319 NetArpWaitPacketMAC = NULL;
320 NetArpWaitTxPacket = NULL;
321 NetArpWaitPacketIP = 0;
322 NetArpWaitReplyIP = 0;
323 NetArpWaitTxPacket = NULL;
324 NetTxPacket = NULL;
325 NetTryCount = 1;
326
327 if (!NetTxPacket) {
328 int i;
329 /*
330 * Setup packet buffers, aligned correctly.
331 */
332 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1);
333 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN;
334 for (i = 0; i < PKTBUFSRX; i++) {
335 NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN;
336 }
337 }
338
339 if (!NetArpWaitTxPacket) {
340 NetArpWaitTxPacket = &NetArpWaitPacketBuf[0] + (PKTALIGN - 1);
341 NetArpWaitTxPacket -= (ulong)NetArpWaitTxPacket % PKTALIGN;
342 NetArpWaitTxPacketSize = 0;
343 }
344
345 eth_halt();
346 #ifdef CONFIG_NET_MULTI
347 eth_set_current();
348 #endif
349 if (eth_init(bd) < 0) {
350 eth_halt();
351 return(-1);
352 }
353
354 restart:
355 #ifdef CONFIG_NET_MULTI
356 memcpy (NetOurEther, eth_get_dev()->enetaddr, 6);
357 #else
358 eth_getenv_enetaddr("ethaddr", NetOurEther);
359 #endif
360
361 NetState = NETLOOP_CONTINUE;
362
363 /*
364 * Start the ball rolling with the given start function. From
365 * here on, this code is a state machine driven by received
366 * packets and timer events.
367 */
368 NetInitLoop(protocol);
369
370 switch (net_check_prereq (protocol)) {
371 case 1:
372 /* network not configured */
373 eth_halt();
374 return (-1);
375
376 #ifdef CONFIG_NET_MULTI
377 case 2:
378 /* network device not configured */
379 break;
380 #endif /* CONFIG_NET_MULTI */
381
382 case 0:
383 #ifdef CONFIG_NET_MULTI
384 NetDevExists = 1;
385 #endif
386 switch (protocol) {
387 case TFTP:
388 /* always use ARP to get server ethernet address */
389 TftpStart();
390 break;
391
392 #if defined(CONFIG_CMD_DHCP)
393 case DHCP:
394 BootpTry = 0;
395 NetOurIP = 0;
396 DhcpRequest(); /* Basically same as BOOTP */
397 break;
398 #endif
399
400 case BOOTP:
401 BootpTry = 0;
402 NetOurIP = 0;
403 BootpRequest ();
404 break;
405
406 case RARP:
407 RarpTry = 0;
408 NetOurIP = 0;
409 RarpRequest ();
410 break;
411 #if defined(CONFIG_CMD_PING)
412 case PING:
413 PingStart();
414 break;
415 #endif
416 #if defined(CONFIG_CMD_NFS)
417 case NFS:
418 NfsStart();
419 break;
420 #endif
421 #if defined(CONFIG_CMD_CDP)
422 case CDP:
423 CDPStart();
424 break;
425 #endif
426 #ifdef CONFIG_NETCONSOLE
427 case NETCONS:
428 NcStart();
429 break;
430 #endif
431 #if defined(CONFIG_CMD_SNTP)
432 case SNTP:
433 SntpStart();
434 break;
435 #endif
436 #if defined(CONFIG_CMD_DNS)
437 case DNS:
438 DnsStart();
439 break;
440 #endif
441 default:
442 break;
443 }
444
445 NetBootFileXferSize = 0;
446 break;
447 }
448
449 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
450 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && defined(CONFIG_STATUS_LED) && defined(STATUS_LED_RED)
451 /*
452 * Echo the inverted link state to the fault LED.
453 */
454 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
455 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
456 } else {
457 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
458 }
459 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
460 #endif /* CONFIG_MII, ... */
461
462 /*
463 * Main packet reception loop. Loop receiving packets until
464 * someone sets `NetState' to a state that terminates.
465 */
466 for (;;) {
467 WATCHDOG_RESET();
468 #ifdef CONFIG_SHOW_ACTIVITY
469 {
470 extern void show_activity(int arg);
471 show_activity(1);
472 }
473 #endif
474 /*
475 * Check the ethernet for a new packet. The ethernet
476 * receive routine will process it.
477 */
478 eth_rx();
479
480 /*
481 * Abort if ctrl-c was pressed.
482 */
483 if (ctrlc()) {
484 eth_halt();
485 puts ("\nAbort\n");
486 return (-1);
487 }
488
489 ArpTimeoutCheck();
490
491 /*
492 * Check for a timeout, and run the timeout handler
493 * if we have one.
494 */
495 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) {
496 thand_f *x;
497
498 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
499 # if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
500 defined(CONFIG_STATUS_LED) && \
501 defined(STATUS_LED_RED)
502 /*
503 * Echo the inverted link state to the fault LED.
504 */
505 if(miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) {
506 status_led_set (STATUS_LED_RED, STATUS_LED_OFF);
507 } else {
508 status_led_set (STATUS_LED_RED, STATUS_LED_ON);
509 }
510 # endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
511 #endif /* CONFIG_MII, ... */
512 x = timeHandler;
513 timeHandler = (thand_f *)0;
514 (*x)();
515 }
516
517
518 switch (NetState) {
519
520 case NETLOOP_RESTART:
521 #ifdef CONFIG_NET_MULTI
522 NetRestarted = 1;
523 #endif
524 goto restart;
525
526 case NETLOOP_SUCCESS:
527 if (NetBootFileXferSize > 0) {
528 char buf[20];
529 printf("Bytes transferred = %ld (%lx hex)\n",
530 NetBootFileXferSize,
531 NetBootFileXferSize);
532 sprintf(buf, "%lX", NetBootFileXferSize);
533 setenv("filesize", buf);
534
535 sprintf(buf, "%lX", (unsigned long)load_addr);
536 setenv("fileaddr", buf);
537 }
538 eth_halt();
539 return NetBootFileXferSize;
540
541 case NETLOOP_FAIL:
542 return (-1);
543 }
544 }
545 }
546
547 /**********************************************************************/
548
549 static void
550 startAgainTimeout(void)
551 {
552 NetState = NETLOOP_RESTART;
553 }
554
555 static void
556 startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
557 {
558 /* Totally ignore the packet */
559 }
560
561 void NetStartAgain (void)
562 {
563 char *nretry;
564 int retry_forever = 0;
565 unsigned long retrycnt = 0;
566
567 nretry = getenv("netretry");
568 if (nretry) {
569 if (!strcmp(nretry, "yes"))
570 retry_forever = 1;
571 else if (!strcmp(nretry, "no"))
572 retrycnt = 0;
573 else if (!strcmp(nretry, "once"))
574 retrycnt = 1;
575 else
576 retrycnt = simple_strtoul(nretry, NULL, 0);
577 } else
578 retry_forever = 1;
579
580 if ((!retry_forever) && (NetTryCount >= retrycnt)) {
581 eth_halt();
582 NetState = NETLOOP_FAIL;
583 return;
584 }
585
586 NetTryCount++;
587
588 #ifndef CONFIG_NET_MULTI
589 NetSetTimeout (10000UL, startAgainTimeout);
590 NetSetHandler (startAgainHandler);
591 #else /* !CONFIG_NET_MULTI*/
592 eth_halt ();
593 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
594 eth_try_another (!NetRestarted);
595 #endif
596 eth_init (gd->bd);
597 if (NetRestartWrap) {
598 NetRestartWrap = 0;
599 if (NetDevExists) {
600 NetSetTimeout (10000UL, startAgainTimeout);
601 NetSetHandler (startAgainHandler);
602 } else {
603 NetState = NETLOOP_FAIL;
604 }
605 } else {
606 NetState = NETLOOP_RESTART;
607 }
608 #endif /* CONFIG_NET_MULTI */
609 }
610
611 /**********************************************************************/
612 /*
613 * Miscelaneous bits.
614 */
615
616 void
617 NetSetHandler(rxhand_f * f)
618 {
619 packetHandler = f;
620 }
621
622
623 void
624 NetSetTimeout(ulong iv, thand_f * f)
625 {
626 if (iv == 0) {
627 timeHandler = (thand_f *)0;
628 } else {
629 timeHandler = f;
630 timeStart = get_timer(0);
631 timeDelta = iv;
632 }
633 }
634
635
636 void
637 NetSendPacket(volatile uchar * pkt, int len)
638 {
639 (void) eth_send(pkt, len);
640 }
641
642 int
643 NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
644 {
645 uchar *pkt;
646
647 /* convert to new style broadcast */
648 if (dest == 0)
649 dest = 0xFFFFFFFF;
650
651 /* if broadcast, make the ether address a broadcast and don't do ARP */
652 if (dest == 0xFFFFFFFF)
653 ether = NetBcastAddr;
654
655 /* if MAC address was not discovered yet, save the packet and do an ARP request */
656 if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
657
658 debug("sending ARP for %08lx\n", dest);
659
660 NetArpWaitPacketIP = dest;
661 NetArpWaitPacketMAC = ether;
662
663 pkt = NetArpWaitTxPacket;
664 pkt += NetSetEther (pkt, NetArpWaitPacketMAC, PROT_IP);
665
666 NetSetIP (pkt, dest, dport, sport, len);
667 memcpy(pkt + IP_HDR_SIZE, (uchar *)NetTxPacket + (pkt - (uchar *)NetArpWaitTxPacket) + IP_HDR_SIZE, len);
668
669 /* size of the waiting packet */
670 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + len;
671
672 /* and do the ARP request */
673 NetArpWaitTry = 1;
674 NetArpWaitTimerStart = get_timer(0);
675 ArpRequest();
676 return 1; /* waiting */
677 }
678
679 debug("sending UDP to %08lx/%pM\n", dest, ether);
680
681 pkt = (uchar *)NetTxPacket;
682 pkt += NetSetEther (pkt, ether, PROT_IP);
683 NetSetIP (pkt, dest, dport, sport, len);
684 (void) eth_send(NetTxPacket, (pkt - NetTxPacket) + IP_HDR_SIZE + len);
685
686 return 0; /* transmitted */
687 }
688
689 #if defined(CONFIG_CMD_PING)
690 static ushort PingSeqNo;
691
692 int PingSend(void)
693 {
694 static uchar mac[6];
695 volatile IP_t *ip;
696 volatile ushort *s;
697 uchar *pkt;
698
699 /* XXX always send arp request */
700
701 memcpy(mac, NetEtherNullAddr, 6);
702
703 debug("sending ARP for %08lx\n", NetPingIP);
704
705 NetArpWaitPacketIP = NetPingIP;
706 NetArpWaitPacketMAC = mac;
707
708 pkt = NetArpWaitTxPacket;
709 pkt += NetSetEther(pkt, mac, PROT_IP);
710
711 ip = (volatile IP_t *)pkt;
712
713 /*
714 * Construct an IP and ICMP header. (need to set no fragment bit - XXX)
715 */
716 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
717 ip->ip_tos = 0;
718 ip->ip_len = htons(IP_HDR_SIZE_NO_UDP + 8);
719 ip->ip_id = htons(NetIPID++);
720 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
721 ip->ip_ttl = 255;
722 ip->ip_p = 0x01; /* ICMP */
723 ip->ip_sum = 0;
724 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
725 NetCopyIP((void*)&ip->ip_dst, &NetPingIP); /* - "" - */
726 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
727
728 s = &ip->udp_src; /* XXX ICMP starts here */
729 s[0] = htons(0x0800); /* echo-request, code */
730 s[1] = 0; /* checksum */
731 s[2] = 0; /* identifier */
732 s[3] = htons(PingSeqNo++); /* sequence number */
733 s[1] = ~NetCksum((uchar *)s, 8/2);
734
735 /* size of the waiting packet */
736 NetArpWaitTxPacketSize = (pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
737
738 /* and do the ARP request */
739 NetArpWaitTry = 1;
740 NetArpWaitTimerStart = get_timer(0);
741 ArpRequest();
742 return 1; /* waiting */
743 }
744
745 static void
746 PingTimeout (void)
747 {
748 eth_halt();
749 NetState = NETLOOP_FAIL; /* we did not get the reply */
750 }
751
752 static void
753 PingHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
754 {
755 IPaddr_t tmp;
756 volatile IP_t *ip = (volatile IP_t *)pkt;
757
758 tmp = NetReadIP((void *)&ip->ip_src);
759 if (tmp != NetPingIP)
760 return;
761
762 NetState = NETLOOP_SUCCESS;
763 }
764
765 static void PingStart(void)
766 {
767 #if defined(CONFIG_NET_MULTI)
768 printf ("Using %s device\n", eth_get_name());
769 #endif /* CONFIG_NET_MULTI */
770 NetSetTimeout (10000UL, PingTimeout);
771 NetSetHandler (PingHandler);
772
773 PingSend();
774 }
775 #endif
776
777 #if defined(CONFIG_CMD_CDP)
778
779 #define CDP_DEVICE_ID_TLV 0x0001
780 #define CDP_ADDRESS_TLV 0x0002
781 #define CDP_PORT_ID_TLV 0x0003
782 #define CDP_CAPABILITIES_TLV 0x0004
783 #define CDP_VERSION_TLV 0x0005
784 #define CDP_PLATFORM_TLV 0x0006
785 #define CDP_NATIVE_VLAN_TLV 0x000a
786 #define CDP_APPLIANCE_VLAN_TLV 0x000e
787 #define CDP_TRIGGER_TLV 0x000f
788 #define CDP_POWER_CONSUMPTION_TLV 0x0010
789 #define CDP_SYSNAME_TLV 0x0014
790 #define CDP_SYSOBJECT_TLV 0x0015
791 #define CDP_MANAGEMENT_ADDRESS_TLV 0x0016
792
793 #define CDP_TIMEOUT 250UL /* one packet every 250ms */
794
795 static int CDPSeq;
796 static int CDPOK;
797
798 ushort CDPNativeVLAN;
799 ushort CDPApplianceVLAN;
800
801 static const uchar CDP_SNAP_hdr[8] = { 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x0C, 0x20, 0x00 };
802
803 static ushort CDP_compute_csum(const uchar *buff, ushort len)
804 {
805 ushort csum;
806 int odd;
807 ulong result = 0;
808 ushort leftover;
809 ushort *p;
810
811 if (len > 0) {
812 odd = 1 & (ulong)buff;
813 if (odd) {
814 result = *buff << 8;
815 len--;
816 buff++;
817 }
818 while (len > 1) {
819 p = (ushort *)buff;
820 result += *p++;
821 buff = (uchar *)p;
822 if (result & 0x80000000)
823 result = (result & 0xFFFF) + (result >> 16);
824 len -= 2;
825 }
826 if (len) {
827 leftover = (signed short)(*(const signed char *)buff);
828 /* CISCO SUCKS big time! (and blows too):
829 * CDP uses the IP checksum algorithm with a twist;
830 * for the last byte it *sign* extends and sums.
831 */
832 result = (result & 0xffff0000) | ((result + leftover) & 0x0000ffff);
833 }
834 while (result >> 16)
835 result = (result & 0xFFFF) + (result >> 16);
836
837 if (odd)
838 result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
839 }
840
841 /* add up 16-bit and 17-bit words for 17+c bits */
842 result = (result & 0xffff) + (result >> 16);
843 /* add up 16-bit and 2-bit for 16+c bit */
844 result = (result & 0xffff) + (result >> 16);
845 /* add up carry.. */
846 result = (result & 0xffff) + (result >> 16);
847
848 /* negate */
849 csum = ~(ushort)result;
850
851 /* run time endian detection */
852 if (csum != htons(csum)) /* little endian */
853 csum = htons(csum);
854
855 return csum;
856 }
857
858 int CDPSendTrigger(void)
859 {
860 volatile uchar *pkt;
861 volatile ushort *s;
862 volatile ushort *cp;
863 Ethernet_t *et;
864 int len;
865 ushort chksum;
866 #if defined(CONFIG_CDP_DEVICE_ID) || defined(CONFIG_CDP_PORT_ID) || \
867 defined(CONFIG_CDP_VERSION) || defined(CONFIG_CDP_PLATFORM)
868 char buf[32];
869 #endif
870
871 pkt = NetTxPacket;
872 et = (Ethernet_t *)pkt;
873
874 /* NOTE: trigger sent not on any VLAN */
875
876 /* form ethernet header */
877 memcpy(et->et_dest, NetCDPAddr, 6);
878 memcpy(et->et_src, NetOurEther, 6);
879
880 pkt += ETHER_HDR_SIZE;
881
882 /* SNAP header */
883 memcpy((uchar *)pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr));
884 pkt += sizeof(CDP_SNAP_hdr);
885
886 /* CDP header */
887 *pkt++ = 0x02; /* CDP version 2 */
888 *pkt++ = 180; /* TTL */
889 s = (volatile ushort *)pkt;
890 cp = s;
891 *s++ = htons(0); /* checksum (0 for later calculation) */
892
893 /* CDP fields */
894 #ifdef CONFIG_CDP_DEVICE_ID
895 *s++ = htons(CDP_DEVICE_ID_TLV);
896 *s++ = htons(CONFIG_CDP_DEVICE_ID);
897 sprintf(buf, CONFIG_CDP_DEVICE_ID_PREFIX "%pm", NetOurEther);
898 memcpy((uchar *)s, buf, 16);
899 s += 16 / 2;
900 #endif
901
902 #ifdef CONFIG_CDP_PORT_ID
903 *s++ = htons(CDP_PORT_ID_TLV);
904 memset(buf, 0, sizeof(buf));
905 sprintf(buf, CONFIG_CDP_PORT_ID, eth_get_dev_index());
906 len = strlen(buf);
907 if (len & 1) /* make it even */
908 len++;
909 *s++ = htons(len + 4);
910 memcpy((uchar *)s, buf, len);
911 s += len / 2;
912 #endif
913
914 #ifdef CONFIG_CDP_CAPABILITIES
915 *s++ = htons(CDP_CAPABILITIES_TLV);
916 *s++ = htons(8);
917 *(ulong *)s = htonl(CONFIG_CDP_CAPABILITIES);
918 s += 2;
919 #endif
920
921 #ifdef CONFIG_CDP_VERSION
922 *s++ = htons(CDP_VERSION_TLV);
923 memset(buf, 0, sizeof(buf));
924 strcpy(buf, CONFIG_CDP_VERSION);
925 len = strlen(buf);
926 if (len & 1) /* make it even */
927 len++;
928 *s++ = htons(len + 4);
929 memcpy((uchar *)s, buf, len);
930 s += len / 2;
931 #endif
932
933 #ifdef CONFIG_CDP_PLATFORM
934 *s++ = htons(CDP_PLATFORM_TLV);
935 memset(buf, 0, sizeof(buf));
936 strcpy(buf, CONFIG_CDP_PLATFORM);
937 len = strlen(buf);
938 if (len & 1) /* make it even */
939 len++;
940 *s++ = htons(len + 4);
941 memcpy((uchar *)s, buf, len);
942 s += len / 2;
943 #endif
944
945 #ifdef CONFIG_CDP_TRIGGER
946 *s++ = htons(CDP_TRIGGER_TLV);
947 *s++ = htons(8);
948 *(ulong *)s = htonl(CONFIG_CDP_TRIGGER);
949 s += 2;
950 #endif
951
952 #ifdef CONFIG_CDP_POWER_CONSUMPTION
953 *s++ = htons(CDP_POWER_CONSUMPTION_TLV);
954 *s++ = htons(6);
955 *s++ = htons(CONFIG_CDP_POWER_CONSUMPTION);
956 #endif
957
958 /* length of ethernet packet */
959 len = (uchar *)s - ((uchar *)NetTxPacket + ETHER_HDR_SIZE);
960 et->et_protlen = htons(len);
961
962 len = ETHER_HDR_SIZE + sizeof(CDP_SNAP_hdr);
963 chksum = CDP_compute_csum((uchar *)NetTxPacket + len, (uchar *)s - (NetTxPacket + len));
964 if (chksum == 0)
965 chksum = 0xFFFF;
966 *cp = htons(chksum);
967
968 (void) eth_send(NetTxPacket, (uchar *)s - NetTxPacket);
969 return 0;
970 }
971
972 static void
973 CDPTimeout (void)
974 {
975 CDPSeq++;
976
977 if (CDPSeq < 3) {
978 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
979 CDPSendTrigger();
980 return;
981 }
982
983 /* if not OK try again */
984 if (!CDPOK)
985 NetStartAgain();
986 else
987 NetState = NETLOOP_SUCCESS;
988 }
989
990 static void
991 CDPDummyHandler (uchar * pkt, unsigned dest, unsigned src, unsigned len)
992 {
993 /* nothing */
994 }
995
996 static void
997 CDPHandler(const uchar * pkt, unsigned len)
998 {
999 const uchar *t;
1000 const ushort *ss;
1001 ushort type, tlen;
1002 uchar applid;
1003 ushort vlan, nvlan;
1004
1005 /* minimum size? */
1006 if (len < sizeof(CDP_SNAP_hdr) + 4)
1007 goto pkt_short;
1008
1009 /* check for valid CDP SNAP header */
1010 if (memcmp(pkt, CDP_SNAP_hdr, sizeof(CDP_SNAP_hdr)) != 0)
1011 return;
1012
1013 pkt += sizeof(CDP_SNAP_hdr);
1014 len -= sizeof(CDP_SNAP_hdr);
1015
1016 /* Version of CDP protocol must be >= 2 and TTL != 0 */
1017 if (pkt[0] < 0x02 || pkt[1] == 0)
1018 return;
1019
1020 /* if version is greater than 0x02 maybe we'll have a problem; output a warning */
1021 if (pkt[0] != 0x02)
1022 printf("** WARNING: CDP packet received with a protocol version %d > 2\n",
1023 pkt[0] & 0xff);
1024
1025 if (CDP_compute_csum(pkt, len) != 0)
1026 return;
1027
1028 pkt += 4;
1029 len -= 4;
1030
1031 vlan = htons(-1);
1032 nvlan = htons(-1);
1033 while (len > 0) {
1034 if (len < 4)
1035 goto pkt_short;
1036
1037 ss = (const ushort *)pkt;
1038 type = ntohs(ss[0]);
1039 tlen = ntohs(ss[1]);
1040 if (tlen > len) {
1041 goto pkt_short;
1042 }
1043
1044 pkt += tlen;
1045 len -= tlen;
1046
1047 ss += 2; /* point ss to the data of the TLV */
1048 tlen -= 4;
1049
1050 switch (type) {
1051 case CDP_DEVICE_ID_TLV:
1052 break;
1053 case CDP_ADDRESS_TLV:
1054 break;
1055 case CDP_PORT_ID_TLV:
1056 break;
1057 case CDP_CAPABILITIES_TLV:
1058 break;
1059 case CDP_VERSION_TLV:
1060 break;
1061 case CDP_PLATFORM_TLV:
1062 break;
1063 case CDP_NATIVE_VLAN_TLV:
1064 nvlan = *ss;
1065 break;
1066 case CDP_APPLIANCE_VLAN_TLV:
1067 t = (const uchar *)ss;
1068 while (tlen > 0) {
1069 if (tlen < 3)
1070 goto pkt_short;
1071
1072 applid = t[0];
1073 ss = (const ushort *)(t + 1);
1074
1075 #ifdef CONFIG_CDP_APPLIANCE_VLAN_TYPE
1076 if (applid == CONFIG_CDP_APPLIANCE_VLAN_TYPE)
1077 vlan = *ss;
1078 #else
1079 vlan = ntohs(*ss); /* XXX will this work; dunno */
1080 #endif
1081 t += 3; tlen -= 3;
1082 }
1083 break;
1084 case CDP_TRIGGER_TLV:
1085 break;
1086 case CDP_POWER_CONSUMPTION_TLV:
1087 break;
1088 case CDP_SYSNAME_TLV:
1089 break;
1090 case CDP_SYSOBJECT_TLV:
1091 break;
1092 case CDP_MANAGEMENT_ADDRESS_TLV:
1093 break;
1094 }
1095 }
1096
1097 CDPApplianceVLAN = vlan;
1098 CDPNativeVLAN = nvlan;
1099
1100 CDPOK = 1;
1101 return;
1102
1103 pkt_short:
1104 printf("** CDP packet is too short\n");
1105 return;
1106 }
1107
1108 static void CDPStart(void)
1109 {
1110 #if defined(CONFIG_NET_MULTI)
1111 printf ("Using %s device\n", eth_get_name());
1112 #endif
1113 CDPSeq = 0;
1114 CDPOK = 0;
1115
1116 CDPNativeVLAN = htons(-1);
1117 CDPApplianceVLAN = htons(-1);
1118
1119 NetSetTimeout (CDP_TIMEOUT, CDPTimeout);
1120 NetSetHandler (CDPDummyHandler);
1121
1122 CDPSendTrigger();
1123 }
1124 #endif
1125
1126 #ifdef CONFIG_IP_DEFRAG
1127 /*
1128 * This function collects fragments in a single packet, according
1129 * to the algorithm in RFC815. It returns NULL or the pointer to
1130 * a complete packet, in static storage
1131 */
1132 #ifndef CONFIG_NET_MAXDEFRAG
1133 #define CONFIG_NET_MAXDEFRAG 16384
1134 #endif
1135 /*
1136 * MAXDEFRAG, above, is chosen in the config file and is real data
1137 * so we need to add the NFS overhead, which is more than TFTP.
1138 * To use sizeof in the internal unnamed structures, we need a real
1139 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately).
1140 * The compiler doesn't complain nor allocates the actual structure
1141 */
1142 static struct rpc_t rpc_specimen;
1143 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
1144
1145 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
1146
1147 /*
1148 * this is the packet being assembled, either data or frag control.
1149 * Fragments go by 8 bytes, so this union must be 8 bytes long
1150 */
1151 struct hole {
1152 /* first_byte is address of this structure */
1153 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
1154 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
1155 u16 prev_hole; /* index of prev, 0 == none */
1156 u16 unused;
1157 };
1158
1159 static IP_t *__NetDefragment(IP_t *ip, int *lenp)
1160 {
1161 static uchar pkt_buff[IP_PKTSIZE] __attribute__((aligned(PKTALIGN)));
1162 static u16 first_hole, total_len;
1163 struct hole *payload, *thisfrag, *h, *newh;
1164 IP_t *localip = (IP_t *)pkt_buff;
1165 uchar *indata = (uchar *)ip;
1166 int offset8, start, len, done = 0;
1167 u16 ip_off = ntohs(ip->ip_off);
1168
1169 /* payload starts after IP header, this fragment is in there */
1170 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
1171 offset8 = (ip_off & IP_OFFS);
1172 thisfrag = payload + offset8;
1173 start = offset8 * 8;
1174 len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
1175
1176 if (start + len > IP_MAXUDP) /* fragment extends too far */
1177 return NULL;
1178
1179 if (!total_len || localip->ip_id != ip->ip_id) {
1180 /* new (or different) packet, reset structs */
1181 total_len = 0xffff;
1182 payload[0].last_byte = ~0;
1183 payload[0].next_hole = 0;
1184 payload[0].prev_hole = 0;
1185 first_hole = 0;
1186 /* any IP header will work, copy the first we received */
1187 memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
1188 }
1189
1190 /*
1191 * What follows is the reassembly algorithm. We use the payload
1192 * array as a linked list of hole descriptors, as each hole starts
1193 * at a multiple of 8 bytes. However, last byte can be whatever value,
1194 * so it is represented as byte count, not as 8-byte blocks.
1195 */
1196
1197 h = payload + first_hole;
1198 while (h->last_byte < start) {
1199 if (!h->next_hole) {
1200 /* no hole that far away */
1201 return NULL;
1202 }
1203 h = payload + h->next_hole;
1204 }
1205
1206 if (offset8 + (len / 8) <= h - payload) {
1207 /* no overlap with holes (dup fragment?) */
1208 return NULL;
1209 }
1210
1211 if (!(ip_off & IP_FLAGS_MFRAG)) {
1212 /* no more fragmentss: truncate this (last) hole */
1213 total_len = start + len;
1214 h->last_byte = start + len;
1215 }
1216
1217 /*
1218 * There is some overlap: fix the hole list. This code doesn't
1219 * deal with a fragment that overlaps with two different holes
1220 * (thus being a superset of a previously-received fragment).
1221 */
1222
1223 if ( (h >= thisfrag) && (h->last_byte <= start + len) ) {
1224 /* complete overlap with hole: remove hole */
1225 if (!h->prev_hole && !h->next_hole) {
1226 /* last remaining hole */
1227 done = 1;
1228 } else if (!h->prev_hole) {
1229 /* first hole */
1230 first_hole = h->next_hole;
1231 payload[h->next_hole].prev_hole = 0;
1232 } else if (!h->next_hole) {
1233 /* last hole */
1234 payload[h->prev_hole].next_hole = 0;
1235 } else {
1236 /* in the middle of the list */
1237 payload[h->next_hole].prev_hole = h->prev_hole;
1238 payload[h->prev_hole].next_hole = h->next_hole;
1239 }
1240
1241 } else if (h->last_byte <= start + len) {
1242 /* overlaps with final part of the hole: shorten this hole */
1243 h->last_byte = start;
1244
1245 } else if (h >= thisfrag) {
1246 /* overlaps with initial part of the hole: move this hole */
1247 newh = thisfrag + (len / 8);
1248 *newh = *h;
1249 h = newh;
1250 if (h->next_hole)
1251 payload[h->next_hole].prev_hole = (h - payload);
1252 if (h->prev_hole)
1253 payload[h->prev_hole].next_hole = (h - payload);
1254 else
1255 first_hole = (h - payload);
1256
1257 } else {
1258 /* fragment sits in the middle: split the hole */
1259 newh = thisfrag + (len / 8);
1260 *newh = *h;
1261 h->last_byte = start;
1262 h->next_hole = (newh - payload);
1263 newh->prev_hole = (h - payload);
1264 if (newh->next_hole)
1265 payload[newh->next_hole].prev_hole = (newh - payload);
1266 }
1267
1268 /* finally copy this fragment and possibly return whole packet */
1269 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
1270 if (!done)
1271 return NULL;
1272
1273 localip->ip_len = htons(total_len);
1274 *lenp = total_len + IP_HDR_SIZE_NO_UDP;
1275 return localip;
1276 }
1277
1278 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1279 {
1280 u16 ip_off = ntohs(ip->ip_off);
1281 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1282 return ip; /* not a fragment */
1283 return __NetDefragment(ip, lenp);
1284 }
1285
1286 #else /* !CONFIG_IP_DEFRAG */
1287
1288 static inline IP_t *NetDefragment(IP_t *ip, int *lenp)
1289 {
1290 u16 ip_off = ntohs(ip->ip_off);
1291 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1292 return ip; /* not a fragment */
1293 return NULL;
1294 }
1295 #endif
1296
1297 void
1298 NetReceive(volatile uchar * inpkt, int len)
1299 {
1300 Ethernet_t *et;
1301 IP_t *ip;
1302 ARP_t *arp;
1303 IPaddr_t tmp;
1304 int x;
1305 uchar *pkt;
1306 #if defined(CONFIG_CMD_CDP)
1307 int iscdp;
1308 #endif
1309 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1310
1311 debug("packet received\n");
1312
1313 NetRxPacket = inpkt;
1314 NetRxPacketLen = len;
1315 et = (Ethernet_t *)inpkt;
1316
1317 /* too small packet? */
1318 if (len < ETHER_HDR_SIZE)
1319 return;
1320
1321 #ifdef CONFIG_API
1322 if (push_packet) {
1323 (*push_packet)(inpkt, len);
1324 return;
1325 }
1326 #endif
1327
1328 #if defined(CONFIG_CMD_CDP)
1329 /* keep track if packet is CDP */
1330 iscdp = memcmp(et->et_dest, NetCDPAddr, 6) == 0;
1331 #endif
1332
1333 myvlanid = ntohs(NetOurVLAN);
1334 if (myvlanid == (ushort)-1)
1335 myvlanid = VLAN_NONE;
1336 mynvlanid = ntohs(NetOurNativeVLAN);
1337 if (mynvlanid == (ushort)-1)
1338 mynvlanid = VLAN_NONE;
1339
1340 x = ntohs(et->et_protlen);
1341
1342 debug("packet received\n");
1343
1344 if (x < 1514) {
1345 /*
1346 * Got a 802 packet. Check the other protocol field.
1347 */
1348 x = ntohs(et->et_prot);
1349
1350 ip = (IP_t *)(inpkt + E802_HDR_SIZE);
1351 len -= E802_HDR_SIZE;
1352
1353 } else if (x != PROT_VLAN) { /* normal packet */
1354 ip = (IP_t *)(inpkt + ETHER_HDR_SIZE);
1355 len -= ETHER_HDR_SIZE;
1356
1357 } else { /* VLAN packet */
1358 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)et;
1359
1360 debug("VLAN packet received\n");
1361
1362 /* too small packet? */
1363 if (len < VLAN_ETHER_HDR_SIZE)
1364 return;
1365
1366 /* if no VLAN active */
1367 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE
1368 #if defined(CONFIG_CMD_CDP)
1369 && iscdp == 0
1370 #endif
1371 )
1372 return;
1373
1374 cti = ntohs(vet->vet_tag);
1375 vlanid = cti & VLAN_IDMASK;
1376 x = ntohs(vet->vet_type);
1377
1378 ip = (IP_t *)(inpkt + VLAN_ETHER_HDR_SIZE);
1379 len -= VLAN_ETHER_HDR_SIZE;
1380 }
1381
1382 debug("Receive from protocol 0x%x\n", x);
1383
1384 #if defined(CONFIG_CMD_CDP)
1385 if (iscdp) {
1386 CDPHandler((uchar *)ip, len);
1387 return;
1388 }
1389 #endif
1390
1391 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1392 if (vlanid == VLAN_NONE)
1393 vlanid = (mynvlanid & VLAN_IDMASK);
1394 /* not matched? */
1395 if (vlanid != (myvlanid & VLAN_IDMASK))
1396 return;
1397 }
1398
1399 switch (x) {
1400
1401 case PROT_ARP:
1402 /*
1403 * We have to deal with two types of ARP packets:
1404 * - REQUEST packets will be answered by sending our
1405 * IP address - if we know it.
1406 * - REPLY packates are expected only after we asked
1407 * for the TFTP server's or the gateway's ethernet
1408 * address; so if we receive such a packet, we set
1409 * the server ethernet address
1410 */
1411 debug("Got ARP\n");
1412
1413 arp = (ARP_t *)ip;
1414 if (len < ARP_HDR_SIZE) {
1415 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1416 return;
1417 }
1418 if (ntohs(arp->ar_hrd) != ARP_ETHER) {
1419 return;
1420 }
1421 if (ntohs(arp->ar_pro) != PROT_IP) {
1422 return;
1423 }
1424 if (arp->ar_hln != 6) {
1425 return;
1426 }
1427 if (arp->ar_pln != 4) {
1428 return;
1429 }
1430
1431 if (NetOurIP == 0) {
1432 return;
1433 }
1434
1435 if (NetReadIP(&arp->ar_data[16]) != NetOurIP) {
1436 return;
1437 }
1438
1439 switch (ntohs(arp->ar_op)) {
1440 case ARPOP_REQUEST: /* reply with our IP address */
1441 debug("Got ARP REQUEST, return our IP\n");
1442 pkt = (uchar *)et;
1443 pkt += NetSetEther(pkt, et->et_src, PROT_ARP);
1444 arp->ar_op = htons(ARPOP_REPLY);
1445 memcpy (&arp->ar_data[10], &arp->ar_data[0], 6);
1446 NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]);
1447 memcpy (&arp->ar_data[ 0], NetOurEther, 6);
1448 NetCopyIP(&arp->ar_data[ 6], &NetOurIP);
1449 (void) eth_send((uchar *)et, (pkt - (uchar *)et) + ARP_HDR_SIZE);
1450 return;
1451
1452 case ARPOP_REPLY: /* arp reply */
1453 /* are we waiting for a reply */
1454 if (!NetArpWaitPacketIP || !NetArpWaitPacketMAC)
1455 break;
1456
1457 #ifdef CONFIG_KEEP_SERVERADDR
1458 if (NetServerIP == NetArpWaitPacketIP) {
1459 char buf[20];
1460 sprintf(buf, "%pM", arp->ar_data);
1461 setenv("serveraddr", buf);
1462 }
1463 #endif
1464
1465 debug("Got ARP REPLY, set server/gtwy eth addr (%pM)\n",
1466 arp->ar_data);
1467
1468 tmp = NetReadIP(&arp->ar_data[6]);
1469
1470 /* matched waiting packet's address */
1471 if (tmp == NetArpWaitReplyIP) {
1472 debug("Got it\n");
1473 /* save address for later use */
1474 memcpy(NetArpWaitPacketMAC, &arp->ar_data[0], 6);
1475
1476 #ifdef CONFIG_NETCONSOLE
1477 (*packetHandler)(0,0,0,0);
1478 #endif
1479 /* modify header, and transmit it */
1480 memcpy(((Ethernet_t *)NetArpWaitTxPacket)->et_dest, NetArpWaitPacketMAC, 6);
1481 (void) eth_send(NetArpWaitTxPacket, NetArpWaitTxPacketSize);
1482
1483 /* no arp request pending now */
1484 NetArpWaitPacketIP = 0;
1485 NetArpWaitTxPacketSize = 0;
1486 NetArpWaitPacketMAC = NULL;
1487
1488 }
1489 return;
1490 default:
1491 debug("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op));
1492 return;
1493 }
1494 break;
1495
1496 case PROT_RARP:
1497 debug("Got RARP\n");
1498 arp = (ARP_t *)ip;
1499 if (len < ARP_HDR_SIZE) {
1500 printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
1501 return;
1502 }
1503
1504 if ((ntohs(arp->ar_op) != RARPOP_REPLY) ||
1505 (ntohs(arp->ar_hrd) != ARP_ETHER) ||
1506 (ntohs(arp->ar_pro) != PROT_IP) ||
1507 (arp->ar_hln != 6) || (arp->ar_pln != 4)) {
1508
1509 puts ("invalid RARP header\n");
1510 } else {
1511 NetCopyIP(&NetOurIP, &arp->ar_data[16]);
1512 if (NetServerIP == 0)
1513 NetCopyIP(&NetServerIP, &arp->ar_data[ 6]);
1514 memcpy (NetServerEther, &arp->ar_data[ 0], 6);
1515
1516 (*packetHandler)(0,0,0,0);
1517 }
1518 break;
1519
1520 case PROT_IP:
1521 debug("Got IP\n");
1522 /* Before we start poking the header, make sure it is there */
1523 if (len < IP_HDR_SIZE) {
1524 debug("len bad %d < %lu\n", len, (ulong)IP_HDR_SIZE);
1525 return;
1526 }
1527 /* Check the packet length */
1528 if (len < ntohs(ip->ip_len)) {
1529 printf("len bad %d < %d\n", len, ntohs(ip->ip_len));
1530 return;
1531 }
1532 len = ntohs(ip->ip_len);
1533 debug("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff);
1534
1535 /* Can't deal with anything except IPv4 */
1536 if ((ip->ip_hl_v & 0xf0) != 0x40) {
1537 return;
1538 }
1539 /* Can't deal with IP options (headers != 20 bytes) */
1540 if ((ip->ip_hl_v & 0x0f) > 0x05) {
1541 return;
1542 }
1543 /* Check the Checksum of the header */
1544 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
1545 puts ("checksum bad\n");
1546 return;
1547 }
1548 /* If it is not for us, ignore it */
1549 tmp = NetReadIP(&ip->ip_dst);
1550 if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) {
1551 #ifdef CONFIG_MCAST_TFTP
1552 if (Mcast_addr != tmp)
1553 #endif
1554 return;
1555 }
1556 /*
1557 * The function returns the unchanged packet if it's not
1558 * a fragment, and either the complete packet or NULL if
1559 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1560 */
1561 if (!(ip = NetDefragment(ip, &len)))
1562 return;
1563 /*
1564 * watch for ICMP host redirects
1565 *
1566 * There is no real handler code (yet). We just watch
1567 * for ICMP host redirect messages. In case anybody
1568 * sees these messages: please contact me
1569 * (wd@denx.de), or - even better - send me the
1570 * necessary fixes :-)
1571 *
1572 * Note: in all cases where I have seen this so far
1573 * it was a problem with the router configuration,
1574 * for instance when a router was configured in the
1575 * BOOTP reply, but the TFTP server was on the same
1576 * subnet. So this is probably a warning that your
1577 * configuration might be wrong. But I'm not really
1578 * sure if there aren't any other situations.
1579 */
1580 if (ip->ip_p == IPPROTO_ICMP) {
1581 ICMP_t *icmph = (ICMP_t *)&(ip->udp_src);
1582
1583 switch (icmph->type) {
1584 case ICMP_REDIRECT:
1585 if (icmph->code != ICMP_REDIR_HOST)
1586 return;
1587 printf (" ICMP Host Redirect to %pI4 ", &icmph->un.gateway);
1588 return;
1589 #if defined(CONFIG_CMD_PING)
1590 case ICMP_ECHO_REPLY:
1591 /*
1592 * IP header OK. Pass the packet to the current handler.
1593 */
1594 /* XXX point to ip packet */
1595 (*packetHandler)((uchar *)ip, 0, 0, 0);
1596 return;
1597 case ICMP_ECHO_REQUEST:
1598 debug("Got ICMP ECHO REQUEST, return %d bytes \n",
1599 ETHER_HDR_SIZE + len);
1600
1601 memcpy (&et->et_dest[0], &et->et_src[0], 6);
1602 memcpy (&et->et_src[ 0], NetOurEther, 6);
1603
1604 ip->ip_sum = 0;
1605 ip->ip_off = 0;
1606 NetCopyIP((void*)&ip->ip_dst, &ip->ip_src);
1607 NetCopyIP((void*)&ip->ip_src, &NetOurIP);
1608 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP >> 1);
1609
1610 icmph->type = ICMP_ECHO_REPLY;
1611 icmph->checksum = 0;
1612 icmph->checksum = ~NetCksum((uchar *)icmph,
1613 (len - IP_HDR_SIZE_NO_UDP) >> 1);
1614 (void) eth_send((uchar *)et, ETHER_HDR_SIZE + len);
1615 return;
1616 #endif
1617 default:
1618 return;
1619 }
1620 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1621 return;
1622 }
1623
1624 #ifdef CONFIG_UDP_CHECKSUM
1625 if (ip->udp_xsum != 0) {
1626 ulong xsum;
1627 ushort *sumptr;
1628 ushort sumlen;
1629
1630 xsum = ip->ip_p;
1631 xsum += (ntohs(ip->udp_len));
1632 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff;
1633 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff;
1634 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff;
1635 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff;
1636
1637 sumlen = ntohs(ip->udp_len);
1638 sumptr = (ushort *) &(ip->udp_src);
1639
1640 while (sumlen > 1) {
1641 ushort sumdata;
1642
1643 sumdata = *sumptr++;
1644 xsum += ntohs(sumdata);
1645 sumlen -= 2;
1646 }
1647 if (sumlen > 0) {
1648 ushort sumdata;
1649
1650 sumdata = *(unsigned char *) sumptr;
1651 sumdata = (sumdata << 8) & 0xff00;
1652 xsum += sumdata;
1653 }
1654 while ((xsum >> 16) != 0) {
1655 xsum = (xsum & 0x0000ffff) + ((xsum >> 16) & 0x0000ffff);
1656 }
1657 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1658 printf(" UDP wrong checksum %08lx %08x\n",
1659 xsum, ntohs(ip->udp_xsum));
1660 return;
1661 }
1662 }
1663 #endif
1664
1665
1666 #ifdef CONFIG_NETCONSOLE
1667 nc_input_packet((uchar *)ip +IP_HDR_SIZE,
1668 ntohs(ip->udp_dst),
1669 ntohs(ip->udp_src),
1670 ntohs(ip->udp_len) - 8);
1671 #endif
1672 /*
1673 * IP header OK. Pass the packet to the current handler.
1674 */
1675 (*packetHandler)((uchar *)ip +IP_HDR_SIZE,
1676 ntohs(ip->udp_dst),
1677 ntohs(ip->udp_src),
1678 ntohs(ip->udp_len) - 8);
1679 break;
1680 }
1681 }
1682
1683
1684 /**********************************************************************/
1685
1686 static int net_check_prereq (proto_t protocol)
1687 {
1688 switch (protocol) {
1689 /* Fall through */
1690 #if defined(CONFIG_CMD_PING)
1691 case PING:
1692 if (NetPingIP == 0) {
1693 puts ("*** ERROR: ping address not given\n");
1694 return (1);
1695 }
1696 goto common;
1697 #endif
1698 #if defined(CONFIG_CMD_SNTP)
1699 case SNTP:
1700 if (NetNtpServerIP == 0) {
1701 puts ("*** ERROR: NTP server address not given\n");
1702 return (1);
1703 }
1704 goto common;
1705 #endif
1706 #if defined(CONFIG_CMD_DNS)
1707 case DNS:
1708 if (NetOurDNSIP == 0) {
1709 puts("*** ERROR: DNS server address not given\n");
1710 return 1;
1711 }
1712 goto common;
1713 #endif
1714 #if defined(CONFIG_CMD_NFS)
1715 case NFS:
1716 #endif
1717 case NETCONS:
1718 case TFTP:
1719 if (NetServerIP == 0) {
1720 puts ("*** ERROR: `serverip' not set\n");
1721 return (1);
1722 }
1723 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP)
1724 common:
1725 #endif
1726
1727 if (NetOurIP == 0) {
1728 puts ("*** ERROR: `ipaddr' not set\n");
1729 return (1);
1730 }
1731 /* Fall through */
1732
1733 case DHCP:
1734 case RARP:
1735 case BOOTP:
1736 case CDP:
1737 if (memcmp (NetOurEther, "\0\0\0\0\0\0", 6) == 0) {
1738 #ifdef CONFIG_NET_MULTI
1739 extern int eth_get_dev_index (void);
1740 int num = eth_get_dev_index ();
1741
1742 switch (num) {
1743 case -1:
1744 puts ("*** ERROR: No ethernet found.\n");
1745 return (1);
1746 case 0:
1747 puts ("*** ERROR: `ethaddr' not set\n");
1748 break;
1749 default:
1750 printf ("*** ERROR: `eth%daddr' not set\n",
1751 num);
1752 break;
1753 }
1754
1755 NetStartAgain ();
1756 return (2);
1757 #else
1758 puts ("*** ERROR: `ethaddr' not set\n");
1759 return (1);
1760 #endif
1761 }
1762 /* Fall through */
1763 default:
1764 return (0);
1765 }
1766 return (0); /* OK */
1767 }
1768 /**********************************************************************/
1769
1770 int
1771 NetCksumOk(uchar * ptr, int len)
1772 {
1773 return !((NetCksum(ptr, len) + 1) & 0xfffe);
1774 }
1775
1776
1777 unsigned
1778 NetCksum(uchar * ptr, int len)
1779 {
1780 ulong xsum;
1781 ushort *p = (ushort *)ptr;
1782
1783 xsum = 0;
1784 while (len-- > 0)
1785 xsum += *p++;
1786 xsum = (xsum & 0xffff) + (xsum >> 16);
1787 xsum = (xsum & 0xffff) + (xsum >> 16);
1788 return (xsum & 0xffff);
1789 }
1790
1791 int
1792 NetEthHdrSize(void)
1793 {
1794 ushort myvlanid;
1795
1796 myvlanid = ntohs(NetOurVLAN);
1797 if (myvlanid == (ushort)-1)
1798 myvlanid = VLAN_NONE;
1799
1800 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : VLAN_ETHER_HDR_SIZE;
1801 }
1802
1803 int
1804 NetSetEther(volatile uchar * xet, uchar * addr, uint prot)
1805 {
1806 Ethernet_t *et = (Ethernet_t *)xet;
1807 ushort myvlanid;
1808
1809 myvlanid = ntohs(NetOurVLAN);
1810 if (myvlanid == (ushort)-1)
1811 myvlanid = VLAN_NONE;
1812
1813 memcpy (et->et_dest, addr, 6);
1814 memcpy (et->et_src, NetOurEther, 6);
1815 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1816 et->et_protlen = htons(prot);
1817 return ETHER_HDR_SIZE;
1818 } else {
1819 VLAN_Ethernet_t *vet = (VLAN_Ethernet_t *)xet;
1820
1821 vet->vet_vlan_type = htons(PROT_VLAN);
1822 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1823 vet->vet_type = htons(prot);
1824 return VLAN_ETHER_HDR_SIZE;
1825 }
1826 }
1827
1828 void
1829 NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len)
1830 {
1831 IP_t *ip = (IP_t *)xip;
1832
1833 /*
1834 * If the data is an odd number of bytes, zero the
1835 * byte after the last byte so that the checksum
1836 * will work.
1837 */
1838 if (len & 1)
1839 xip[IP_HDR_SIZE + len] = 0;
1840
1841 /*
1842 * Construct an IP and UDP header.
1843 * (need to set no fragment bit - XXX)
1844 */
1845 ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */
1846 ip->ip_tos = 0;
1847 ip->ip_len = htons(IP_HDR_SIZE + len);
1848 ip->ip_id = htons(NetIPID++);
1849 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
1850 ip->ip_ttl = 255;
1851 ip->ip_p = 17; /* UDP */
1852 ip->ip_sum = 0;
1853 NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */
1854 NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */
1855 ip->udp_src = htons(sport);
1856 ip->udp_dst = htons(dport);
1857 ip->udp_len = htons(8 + len);
1858 ip->udp_xsum = 0;
1859 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
1860 }
1861
1862 void copy_filename (char *dst, char *src, int size)
1863 {
1864 if (*src && (*src == '"')) {
1865 ++src;
1866 --size;
1867 }
1868
1869 while ((--size > 0) && *src && (*src != '"')) {
1870 *dst++ = *src++;
1871 }
1872 *dst = '\0';
1873 }
1874
1875 #endif
1876
1877 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
1878 /*
1879 * make port a little random, but use something trivial to compute
1880 */
1881 unsigned int random_port(void)
1882 {
1883 return 1024 + (get_timer(0) % 0x8000);;
1884 }
1885 #endif
1886
1887 void ip_to_string (IPaddr_t x, char *s)
1888 {
1889 x = ntohl (x);
1890 sprintf (s, "%d.%d.%d.%d",
1891 (int) ((x >> 24) & 0xff),
1892 (int) ((x >> 16) & 0xff),
1893 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff)
1894 );
1895 }
1896
1897 IPaddr_t string_to_ip(char *s)
1898 {
1899 IPaddr_t addr;
1900 char *e;
1901 int i;
1902
1903 if (s == NULL)
1904 return(0);
1905
1906 for (addr=0, i=0; i<4; ++i) {
1907 ulong val = s ? simple_strtoul(s, &e, 10) : 0;
1908 addr <<= 8;
1909 addr |= (val & 0xFF);
1910 if (s) {
1911 s = (*e) ? e+1 : e;
1912 }
1913 }
1914
1915 return (htonl(addr));
1916 }
1917
1918 void VLAN_to_string(ushort x, char *s)
1919 {
1920 x = ntohs(x);
1921
1922 if (x == (ushort)-1)
1923 x = VLAN_NONE;
1924
1925 if (x == VLAN_NONE)
1926 strcpy(s, "none");
1927 else
1928 sprintf(s, "%d", x & VLAN_IDMASK);
1929 }
1930
1931 ushort string_to_VLAN(char *s)
1932 {
1933 ushort id;
1934
1935 if (s == NULL)
1936 return htons(VLAN_NONE);
1937
1938 if (*s < '0' || *s > '9')
1939 id = VLAN_NONE;
1940 else
1941 id = (ushort)simple_strtoul(s, NULL, 10);
1942
1943 return htons(id);
1944 }
1945
1946 IPaddr_t getenv_IPaddr (char *var)
1947 {
1948 return (string_to_ip(getenv(var)));
1949 }
1950
1951 ushort getenv_VLAN(char *var)
1952 {
1953 return (string_to_VLAN(getenv(var)));
1954 }
"Das U-Boot" Source Tree