]>
Commit | Line | Data |
---|---|---|
2d966958 WD |
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 | ||
60 | ||
61 | #include <common.h> | |
62 | #include <watchdog.h> | |
63 | #include <command.h> | |
64 | #include <net.h> | |
65 | #include "bootp.h" | |
66 | #include "tftp.h" | |
67 | #include "rarp.h" | |
68 | #include "arp.h" | |
69 | ||
70 | #if (CONFIG_COMMANDS & CFG_CMD_NET) | |
71 | ||
72 | #if 0 | |
73 | #define ET_DEBUG | |
74 | #endif | |
75 | ||
76 | /** BOOTP EXTENTIONS **/ | |
77 | ||
78 | IPaddr_t NetOurSubnetMask=0; /* Our subnet mask (0=unknown) */ | |
79 | IPaddr_t NetOurGatewayIP=0; /* Our gateways IP address */ | |
80 | IPaddr_t NetOurDNSIP=0; /* Our DNS IP address */ | |
81 | char NetOurNISDomain[32]={0,}; /* Our NIS domain */ | |
82 | char NetOurHostName[32]={0,}; /* Our hostname */ | |
83 | char NetOurRootPath[64]={0,}; /* Our bootpath */ | |
84 | ushort NetBootFileSize=0; /* Our bootfile size in blocks */ | |
85 | ||
86 | /** END OF BOOTP EXTENTIONS **/ | |
87 | ||
88 | ulong NetBootFileXferSize; /* The actual transferred size of the bootfile (in bytes) */ | |
89 | uchar NetOurEther[6]; /* Our ethernet address */ | |
90 | uchar NetServerEther[6] = /* Boot server enet address */ | |
91 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
92 | IPaddr_t NetOurIP; /* Our IP addr (0 = unknown) */ | |
93 | IPaddr_t NetServerIP; /* Our IP addr (0 = unknown) */ | |
94 | volatile uchar *NetRxPkt; /* Current receive packet */ | |
95 | int NetRxPktLen; /* Current rx packet length */ | |
96 | unsigned NetIPID; /* IP packet ID */ | |
97 | uchar NetBcastAddr[6] = /* Ethernet bcast address */ | |
98 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
99 | int NetState; /* Network loop state */ | |
100 | #ifdef CONFIG_NET_MULTI | |
101 | int NetRestartWrap = 0; /* Tried all network devices */ | |
102 | static int NetRestarted = 0; /* Network loop restarted */ | |
103 | static int NetDevExists = 0; /* At least one device configured */ | |
104 | #endif | |
105 | ||
106 | char BootFile[128]; /* Boot File name */ | |
107 | ||
108 | volatile uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; | |
109 | ||
110 | volatile uchar *NetRxPackets[PKTBUFSRX]; /* Receive packets */ | |
111 | ||
112 | static rxhand_f *packetHandler; /* Current RX packet handler */ | |
113 | static thand_f *timeHandler; /* Current timeout handler */ | |
114 | static ulong timeValue; /* Current timeout value */ | |
115 | volatile uchar *NetTxPacket = 0; /* THE transmit packet */ | |
116 | ||
117 | static int net_check_prereq (proto_t protocol); | |
118 | ||
119 | /**********************************************************************/ | |
120 | /* | |
121 | * Main network processing loop. | |
122 | */ | |
123 | ||
124 | int | |
125 | NetLoop(proto_t protocol) | |
126 | { | |
127 | DECLARE_GLOBAL_DATA_PTR; | |
128 | ||
129 | bd_t *bd = gd->bd; | |
130 | ||
131 | #ifdef CONFIG_NET_MULTI | |
132 | NetRestarted = 0; | |
133 | NetDevExists = 0; | |
134 | #endif | |
135 | ||
136 | if (!NetTxPacket) { | |
137 | int i; | |
138 | ||
139 | /* | |
140 | * Setup packet buffers, aligned correctly. | |
141 | */ | |
142 | NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); | |
143 | NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; | |
144 | for (i = 0; i < PKTBUFSRX; i++) { | |
145 | NetRxPackets[i] = NetTxPacket + (i+1)*PKTSIZE_ALIGN; | |
146 | } | |
147 | } | |
148 | ||
149 | eth_halt(); | |
150 | eth_init(bd); | |
151 | ||
152 | restart: | |
153 | #ifdef CONFIG_NET_MULTI | |
154 | memcpy (NetOurEther, eth_get_dev()->enetaddr, 6); | |
155 | #else | |
156 | memcpy (NetOurEther, bd->bi_enetaddr, 6); | |
157 | #endif | |
158 | ||
159 | NetState = NETLOOP_CONTINUE; | |
160 | ||
161 | /* | |
162 | * Start the ball rolling with the given start function. From | |
163 | * here on, this code is a state machine driven by received | |
164 | * packets and timer events. | |
165 | */ | |
166 | ||
167 | switch (protocol) { | |
168 | case TFTP: | |
169 | NetCopyIP(&NetOurIP, &bd->bi_ip_addr); | |
170 | NetServerIP = getenv_IPaddr ("serverip"); | |
171 | NetOurGatewayIP = getenv_IPaddr ("gatewayip"); | |
172 | NetOurSubnetMask= getenv_IPaddr ("netmask"); | |
173 | break; | |
174 | case BOOTP: | |
175 | case RARP: | |
176 | /* | |
177 | * initialize our IP addr to 0 in order to accept ANY | |
178 | * IP addr assigned to us by the BOOTP / RARP server | |
179 | */ | |
180 | NetOurIP = 0; | |
181 | NetServerIP = 0; | |
182 | break; | |
183 | default: | |
184 | break; | |
185 | } | |
186 | ||
187 | switch (net_check_prereq (protocol)) { | |
188 | case 1: | |
189 | /* network not configured */ | |
1d0350ed | 190 | return (-1); |
2d966958 WD |
191 | |
192 | #ifdef CONFIG_NET_MULTI | |
193 | case 2: | |
194 | /* network device not configured */ | |
195 | break; | |
196 | #endif /* CONFIG_NET_MULTI */ | |
197 | ||
198 | case 0: | |
199 | #ifdef CONFIG_NET_MULTI | |
200 | NetDevExists = 1; | |
201 | #endif | |
202 | switch (protocol) { | |
203 | case TFTP: | |
204 | /* always use ARP to get server ethernet address */ | |
205 | ArpTry = 0; | |
206 | ArpRequest (); | |
207 | break; | |
208 | ||
209 | #if (CONFIG_COMMANDS & CFG_CMD_DHCP) | |
210 | case DHCP: | |
211 | /* Start with a clean slate... */ | |
212 | NetOurIP = 0; | |
213 | NetServerIP = 0; | |
214 | DhcpRequest(); /* Basically same as BOOTP */ | |
215 | break; | |
216 | #endif /* CFG_CMD_DHCP */ | |
217 | ||
218 | case BOOTP: | |
219 | BootpTry = 0; | |
220 | BootpRequest (); | |
221 | break; | |
222 | ||
223 | case RARP: | |
224 | RarpTry = 0; | |
225 | RarpRequest (); | |
226 | break; | |
227 | default: | |
228 | break; | |
229 | } | |
230 | ||
231 | NetBootFileXferSize = 0; | |
232 | break; | |
233 | } | |
234 | ||
235 | ||
236 | /* | |
237 | * Main packet reception loop. Loop receiving packets until | |
238 | * someone sets `NetQuit'. | |
239 | */ | |
240 | for (;;) { | |
241 | WATCHDOG_RESET(); | |
242 | #ifdef CONFIG_SHOW_ACTIVITY | |
243 | { | |
244 | extern void show_activity(int arg); | |
245 | show_activity(1); | |
246 | } | |
247 | #endif | |
248 | /* | |
249 | * Check the ethernet for a new packet. The ethernet | |
250 | * receive routine will process it. | |
251 | */ | |
252 | eth_rx(); | |
253 | ||
254 | /* | |
255 | * Abort if ctrl-c was pressed. | |
256 | */ | |
257 | if (ctrlc()) { | |
258 | eth_halt(); | |
259 | printf("\nAbort\n"); | |
1d0350ed | 260 | return (-1); |
2d966958 WD |
261 | } |
262 | ||
263 | ||
264 | /* | |
265 | * Check for a timeout, and run the timeout handler | |
266 | * if we have one. | |
267 | */ | |
268 | if (timeHandler && (get_timer(0) > timeValue)) { | |
269 | thand_f *x; | |
270 | ||
271 | x = timeHandler; | |
272 | timeHandler = (thand_f *)0; | |
273 | (*x)(); | |
274 | } | |
275 | ||
276 | ||
277 | switch (NetState) { | |
278 | ||
279 | case NETLOOP_RESTART: | |
280 | #ifdef CONFIG_NET_MULTI | |
281 | NetRestarted = 1; | |
282 | #endif | |
283 | goto restart; | |
284 | ||
285 | case NETLOOP_SUCCESS: | |
286 | if (NetBootFileXferSize > 0) { | |
287 | char buf[10]; | |
288 | printf("Bytes transferred = %ld (%lx hex)\n", | |
289 | NetBootFileXferSize, | |
290 | NetBootFileXferSize); | |
291 | sprintf(buf, "%lx", NetBootFileXferSize); | |
292 | setenv("filesize", buf); | |
293 | } | |
294 | eth_halt(); | |
295 | return NetBootFileXferSize; | |
296 | ||
297 | case NETLOOP_FAIL: | |
1d0350ed | 298 | return (-1); |
2d966958 WD |
299 | } |
300 | } | |
301 | } | |
302 | ||
303 | /**********************************************************************/ | |
304 | ||
305 | static void | |
306 | startAgainTimeout(void) | |
307 | { | |
308 | NetState = NETLOOP_RESTART; | |
309 | } | |
310 | ||
311 | static void | |
312 | startAgainHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len) | |
313 | { | |
314 | /* Totally ignore the packet */ | |
315 | } | |
316 | ||
317 | void | |
318 | NetStartAgain(void) | |
319 | { | |
320 | #ifndef CONFIG_NET_MULTI | |
321 | NetSetTimeout(10 * CFG_HZ, startAgainTimeout); | |
322 | NetSetHandler(startAgainHandler); | |
323 | #else | |
324 | DECLARE_GLOBAL_DATA_PTR; | |
325 | ||
326 | eth_halt(); | |
327 | eth_try_another(!NetRestarted); | |
328 | eth_init(gd->bd); | |
329 | if (NetRestartWrap) | |
330 | { | |
331 | NetRestartWrap = 0; | |
332 | if (NetDevExists) | |
333 | { | |
334 | NetSetTimeout(10 * CFG_HZ, startAgainTimeout); | |
335 | NetSetHandler(startAgainHandler); | |
336 | } | |
337 | else | |
338 | { | |
339 | NetState = NETLOOP_FAIL; | |
340 | } | |
341 | } | |
342 | else | |
343 | { | |
344 | NetState = NETLOOP_RESTART; | |
345 | } | |
346 | #endif | |
347 | } | |
348 | ||
349 | /**********************************************************************/ | |
350 | /* | |
351 | * Miscelaneous bits. | |
352 | */ | |
353 | ||
354 | void | |
355 | NetSetHandler(rxhand_f * f) | |
356 | { | |
357 | packetHandler = f; | |
358 | } | |
359 | ||
360 | ||
361 | void | |
362 | NetSetTimeout(int iv, thand_f * f) | |
363 | { | |
364 | if (iv == 0) { | |
365 | timeHandler = (thand_f *)0; | |
366 | } else { | |
367 | timeHandler = f; | |
368 | timeValue = get_timer(0) + iv; | |
369 | } | |
370 | } | |
371 | ||
372 | ||
373 | void | |
374 | NetSendPacket(volatile uchar * pkt, int len) | |
375 | { | |
376 | (void) eth_send(pkt, len); | |
377 | } | |
378 | ||
379 | ||
380 | ||
381 | void | |
382 | NetReceive(volatile uchar * pkt, int len) | |
383 | { | |
384 | Ethernet_t *et; | |
385 | IP_t *ip; | |
386 | ARP_t *arp; | |
387 | IPaddr_t tmp; | |
388 | int x; | |
389 | ||
390 | ||
391 | NetRxPkt = pkt; | |
392 | NetRxPktLen = len; | |
393 | et = (Ethernet_t *)pkt; | |
394 | ||
395 | x = ntohs(et->et_protlen); | |
396 | ||
397 | if (x < 1514) { | |
398 | /* | |
399 | * Got a 802 packet. Check the other protocol field. | |
400 | */ | |
401 | x = ntohs(et->et_prot); | |
402 | ip = (IP_t *)(pkt + E802_HDR_SIZE); | |
403 | len -= E802_HDR_SIZE; | |
404 | } else { | |
405 | ip = (IP_t *)(pkt + ETHER_HDR_SIZE); | |
406 | len -= ETHER_HDR_SIZE; | |
407 | } | |
408 | ||
409 | #ifdef ET_DEBUG | |
410 | printf("Receive from protocol 0x%x\n", x); | |
411 | #endif | |
412 | ||
413 | switch (x) { | |
414 | ||
415 | case PROT_ARP: | |
416 | /* | |
417 | * We have to deal with two types of ARP packets: | |
418 | * - REQUEST packets will be answered by sending our | |
419 | * IP address - if we know it. | |
420 | * - REPLY packates are expected only after we asked | |
421 | * for the TFTP server's or the gateway's ethernet | |
422 | * address; so if we receive such a packet, we set | |
423 | * the server ethernet address | |
424 | */ | |
425 | #ifdef ET_DEBUG | |
426 | printf("Got ARP\n"); | |
427 | #endif | |
428 | arp = (ARP_t *)ip; | |
429 | if (len < ARP_HDR_SIZE) { | |
430 | printf("bad length %d < %d\n", len, ARP_HDR_SIZE); | |
431 | return; | |
432 | } | |
433 | if (ntohs(arp->ar_hrd) != ARP_ETHER) { | |
434 | return; | |
435 | } | |
436 | if (ntohs(arp->ar_pro) != PROT_IP) { | |
437 | return; | |
438 | } | |
439 | if (arp->ar_hln != 6) { | |
440 | return; | |
441 | } | |
442 | if (arp->ar_pln != 4) { | |
443 | return; | |
444 | } | |
445 | ||
446 | if (NetOurIP == 0) { | |
447 | return; | |
448 | } | |
449 | ||
450 | if (NetReadIP(&arp->ar_data[16]) != NetOurIP) { | |
451 | return; | |
452 | } | |
453 | ||
454 | switch (ntohs(arp->ar_op)) { | |
455 | case ARPOP_REQUEST: /* reply with our IP address */ | |
456 | #ifdef ET_DEBUG | |
457 | printf("Got ARP REQUEST, return our IP\n"); | |
458 | #endif | |
459 | NetSetEther((uchar *)et, et->et_src, PROT_ARP); | |
460 | arp->ar_op = htons(ARPOP_REPLY); | |
461 | memcpy (&arp->ar_data[10], &arp->ar_data[0], 6); | |
462 | NetCopyIP(&arp->ar_data[16], &arp->ar_data[6]); | |
463 | memcpy (&arp->ar_data[ 0], NetOurEther, 6); | |
464 | NetCopyIP(&arp->ar_data[ 6], &NetOurIP); | |
465 | NetSendPacket((uchar *)et,((uchar *)arp-pkt)+ARP_HDR_SIZE); | |
466 | return; | |
467 | case ARPOP_REPLY: /* set TFTP server eth addr */ | |
468 | #ifdef ET_DEBUG | |
469 | printf("Got ARP REPLY, set server/gtwy eth addr\n"); | |
470 | #endif | |
471 | memcpy (NetServerEther, &arp->ar_data[0], 6); | |
472 | (*packetHandler)(0,0,0,0); /* start TFTP */ | |
473 | return; | |
474 | default: | |
475 | #ifdef ET_DEBUG | |
476 | printf("Unexpected ARP opcode 0x%x\n", ntohs(arp->ar_op)); | |
477 | #endif | |
478 | return; | |
479 | } | |
480 | ||
481 | case PROT_RARP: | |
482 | #ifdef ET_DEBUG | |
483 | printf("Got RARP\n"); | |
484 | #endif | |
485 | arp = (ARP_t *)ip; | |
486 | if (len < ARP_HDR_SIZE) { | |
487 | printf("bad length %d < %d\n", len, ARP_HDR_SIZE); | |
488 | return; | |
489 | } | |
490 | ||
491 | if ((ntohs(arp->ar_op) != RARPOP_REPLY) || | |
492 | (ntohs(arp->ar_hrd) != ARP_ETHER) || | |
493 | (ntohs(arp->ar_pro) != PROT_IP) || | |
494 | (arp->ar_hln != 6) || (arp->ar_pln != 4)) { | |
495 | ||
496 | printf("invalid RARP header\n"); | |
497 | } else { | |
498 | NetCopyIP(&NetOurIP, &arp->ar_data[16]); | |
499 | NetCopyIP(&NetServerIP, &arp->ar_data[ 6]); | |
500 | memcpy (NetServerEther, &arp->ar_data[ 0], 6); | |
501 | ||
502 | (*packetHandler)(0,0,0,0); | |
503 | } | |
504 | break; | |
505 | ||
506 | case PROT_IP: | |
507 | #ifdef ET_DEBUG | |
508 | printf("Got IP\n"); | |
509 | #endif | |
510 | if (len < IP_HDR_SIZE) { | |
511 | debug ("len bad %d < %d\n", len, IP_HDR_SIZE); | |
512 | return; | |
513 | } | |
514 | if (len < ntohs(ip->ip_len)) { | |
515 | printf("len bad %d < %d\n", len, ntohs(ip->ip_len)); | |
516 | return; | |
517 | } | |
518 | len = ntohs(ip->ip_len); | |
519 | #ifdef ET_DEBUG | |
520 | printf("len=%d, v=%02x\n", len, ip->ip_hl_v & 0xff); | |
521 | #endif | |
522 | if ((ip->ip_hl_v & 0xf0) != 0x40) { | |
523 | return; | |
524 | } | |
525 | if (ip->ip_off & htons(0x1fff)) { /* Can't deal w/ fragments */ | |
526 | return; | |
527 | } | |
528 | if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) { | |
529 | printf("checksum bad\n"); | |
530 | return; | |
531 | } | |
532 | tmp = NetReadIP(&ip->ip_dst); | |
533 | if (NetOurIP && tmp != NetOurIP && tmp != 0xFFFFFFFF) { | |
534 | return; | |
535 | } | |
536 | /* | |
537 | * watch for ICMP host redirects | |
538 | * | |
539 | * There is no real handler code (yet). We just watch | |
540 | * for ICMP host redirect messages. In case anybody | |
541 | * sees these messages: please contact me | |
542 | * (wd@denx.de), or - even better - send me the | |
543 | * necessary fixes :-) | |
544 | * | |
545 | * Note: in all cases where I have seen this so far | |
546 | * it was a problem with the router configuration, | |
547 | * for instance when a router was configured in the | |
548 | * BOOTP reply, but the TFTP server was on the same | |
549 | * subnet. So this is probably a warning that your | |
550 | * configuration might be wrong. But I'm not really | |
551 | * sure if there aren't any other situations. | |
552 | */ | |
553 | if (ip->ip_p == IPPROTO_ICMP) { | |
554 | ICMP_t *icmph = (ICMP_t *)&(ip->udp_src); | |
555 | ||
556 | if (icmph->type != ICMP_REDIRECT) | |
557 | return; | |
558 | if (icmph->code != ICMP_REDIR_HOST) | |
559 | return; | |
560 | puts (" ICMP Host Redirect to "); | |
561 | print_IPaddr(icmph->un.gateway); | |
562 | putc(' '); | |
563 | } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ | |
564 | return; | |
565 | } | |
566 | ||
567 | /* | |
568 | * IP header OK. Pass the packet to the current handler. | |
569 | */ | |
570 | (*packetHandler)((uchar *)ip +IP_HDR_SIZE, | |
571 | ntohs(ip->udp_dst), | |
572 | ntohs(ip->udp_src), | |
573 | ntohs(ip->udp_len) - 8); | |
574 | ||
575 | break; | |
576 | } | |
577 | } | |
578 | ||
579 | ||
580 | /**********************************************************************/ | |
581 | ||
582 | static int net_check_prereq (proto_t protocol) | |
583 | { | |
584 | switch (protocol) { | |
585 | case ARP: /* nothing to do */ | |
586 | break; | |
587 | ||
588 | case TFTP: | |
589 | if (NetServerIP == 0) { | |
590 | puts ("*** ERROR: `serverip' not set\n"); | |
591 | return (1); | |
592 | } | |
593 | ||
594 | if (NetOurIP == 0) { | |
595 | puts ("*** ERROR: `ipaddr' not set\n"); | |
596 | return (1); | |
597 | } | |
598 | /* Fall through */ | |
599 | ||
600 | case DHCP: | |
601 | case RARP: | |
602 | case BOOTP: | |
603 | if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { | |
604 | #ifdef CONFIG_NET_MULTI | |
605 | extern int eth_get_dev_index (void); | |
606 | int num = eth_get_dev_index(); | |
607 | ||
608 | switch (num) { | |
609 | case -1: | |
610 | puts ("*** ERROR: No ethernet found.\n"); | |
611 | return (1); | |
612 | case 0: | |
613 | puts ("*** ERROR: `ethaddr' not set\n"); | |
614 | break; | |
615 | default: | |
616 | printf ("*** ERROR: `eth%daddr' not set\n", | |
617 | num); | |
618 | break; | |
619 | } | |
620 | ||
621 | NetStartAgain (); | |
622 | return (2); | |
623 | #else | |
624 | puts ("*** ERROR: `ethaddr' not set\n"); | |
625 | return (1); | |
626 | #endif | |
627 | } | |
628 | /* Fall through */ | |
629 | } | |
630 | return (0); /* OK */ | |
631 | } | |
632 | /**********************************************************************/ | |
633 | ||
634 | int | |
635 | NetCksumOk(uchar * ptr, int len) | |
636 | { | |
637 | return !((NetCksum(ptr, len) + 1) & 0xfffe); | |
638 | } | |
639 | ||
640 | ||
641 | unsigned | |
642 | NetCksum(uchar * ptr, int len) | |
643 | { | |
644 | ulong xsum; | |
645 | ||
646 | xsum = 0; | |
647 | while (len-- > 0) | |
648 | xsum += *((ushort *)ptr)++; | |
649 | xsum = (xsum & 0xffff) + (xsum >> 16); | |
650 | xsum = (xsum & 0xffff) + (xsum >> 16); | |
651 | return (xsum & 0xffff); | |
652 | } | |
653 | ||
654 | ||
655 | void | |
656 | NetSetEther(volatile uchar * xet, uchar * addr, uint prot) | |
657 | { | |
658 | Ethernet_t *et = (Ethernet_t *)xet; | |
659 | ||
660 | memcpy (et->et_dest, addr, 6); | |
661 | memcpy (et->et_src, NetOurEther, 6); | |
662 | et->et_protlen = htons(prot); | |
663 | } | |
664 | ||
665 | ||
666 | void | |
667 | NetSetIP(volatile uchar * xip, IPaddr_t dest, int dport, int sport, int len) | |
668 | { | |
669 | volatile IP_t *ip = (IP_t *)xip; | |
670 | ||
671 | /* | |
672 | * If the data is an odd number of bytes, zero the | |
673 | * byte after the last byte so that the checksum | |
674 | * will work. | |
675 | */ | |
676 | if (len & 1) | |
677 | xip[IP_HDR_SIZE + len] = 0; | |
678 | ||
679 | /* | |
680 | * Construct an IP and UDP header. | |
681 | (need to set no fragment bit - XXX) | |
682 | */ | |
683 | ip->ip_hl_v = 0x45; /* IP_HDR_SIZE / 4 (not including UDP) */ | |
684 | ip->ip_tos = 0; | |
685 | ip->ip_len = htons(IP_HDR_SIZE + len); | |
686 | ip->ip_id = htons(NetIPID++); | |
687 | ip->ip_off = htons(0x4000); /* No fragmentation */ | |
688 | ip->ip_ttl = 255; | |
689 | ip->ip_p = 17; /* UDP */ | |
690 | ip->ip_sum = 0; | |
691 | NetCopyIP((void*)&ip->ip_src, &NetOurIP); /* already in network byte order */ | |
692 | NetCopyIP((void*)&ip->ip_dst, &dest); /* - "" - */ | |
693 | ip->udp_src = htons(sport); | |
694 | ip->udp_dst = htons(dport); | |
695 | ip->udp_len = htons(8 + len); | |
696 | ip->udp_xsum = 0; | |
697 | ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2); | |
698 | } | |
699 | ||
700 | void copy_filename (uchar *dst, uchar *src, int size) | |
701 | { | |
702 | if (*src && (*src == '"')) { | |
703 | ++src; | |
704 | --size; | |
705 | } | |
706 | ||
707 | while ((--size > 0) && *src && (*src != '"')) { | |
708 | *dst++ = *src++; | |
709 | } | |
710 | *dst = '\0'; | |
711 | } | |
712 | ||
713 | #endif /* CFG_CMD_NET */ | |
714 | ||
715 | void ip_to_string (IPaddr_t x, char *s) | |
716 | { | |
717 | x = ntohl(x); | |
718 | sprintf (s,"%d.%d.%d.%d", | |
719 | (int)((x >> 24) & 0xff), | |
720 | (int)((x >> 16) & 0xff), | |
721 | (int)((x >> 8) & 0xff), | |
722 | (int)((x >> 0) & 0xff) | |
723 | ); | |
724 | } | |
725 | ||
726 | void print_IPaddr (IPaddr_t x) | |
727 | { | |
728 | char tmp[16]; | |
729 | ||
730 | ip_to_string(x, tmp); | |
731 | ||
732 | puts(tmp); | |
733 | } | |
734 | ||
735 | IPaddr_t getenv_IPaddr (char *var) | |
736 | { | |
737 | IPaddr_t addr; | |
738 | char *s, *e; | |
739 | int i; | |
740 | ||
741 | s = getenv (var); | |
742 | ||
743 | for (addr=0, i=0; i<4; ++i) { | |
744 | ulong val = s ? simple_strtoul(s, &e, 10) : 0; | |
745 | addr <<= 8; | |
746 | addr |= (val & 0xFF); | |
747 | if (s) { | |
748 | s = (*e) ? e+1 : e; | |
749 | } | |
750 | } | |
751 | ||
752 | return (htonl(addr)); | |
753 | } |