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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 | * | |
d22c338e JH |
26 | * LINK_LOCAL: |
27 | * | |
28 | * Prerequisites: - own ethernet address | |
29 | * We want: - own IP address | |
30 | * Next step: ARP | |
31 | * | |
2d966958 WD |
32 | * RARP: |
33 | * | |
34 | * Prerequisites: - own ethernet address | |
35 | * We want: - own IP address | |
36 | * - TFTP server IP address | |
37 | * Next step: ARP | |
38 | * | |
39 | * ARP: | |
40 | * | |
41 | * Prerequisites: - own ethernet address | |
42 | * - own IP address | |
43 | * - TFTP server IP address | |
44 | * We want: - TFTP server ethernet address | |
45 | * Next step: TFTP | |
46 | * | |
47 | * DHCP: | |
48 | * | |
b2f50807 WD |
49 | * Prerequisites: - own ethernet address |
50 | * We want: - IP, Netmask, ServerIP, Gateway IP | |
51 | * - bootfilename, lease time | |
52 | * Next step: - TFTP | |
2d966958 WD |
53 | * |
54 | * TFTP: | |
55 | * | |
56 | * Prerequisites: - own ethernet address | |
57 | * - own IP address | |
58 | * - TFTP server IP address | |
59 | * - TFTP server ethernet address | |
60 | * - name of bootfile (if unknown, we use a default name | |
61 | * derived from our own IP address) | |
62 | * We want: - load the boot file | |
63 | * Next step: none | |
cbd8a35c WD |
64 | * |
65 | * NFS: | |
66 | * | |
67 | * Prerequisites: - own ethernet address | |
68 | * - own IP address | |
69 | * - name of bootfile (if unknown, we use a default name | |
70 | * derived from our own IP address) | |
71 | * We want: - load the boot file | |
72 | * Next step: none | |
ea287deb WD |
73 | * |
74 | * SNTP: | |
75 | * | |
b2f50807 | 76 | * Prerequisites: - own ethernet address |
ea287deb WD |
77 | * - own IP address |
78 | * We want: - network time | |
79 | * Next step: none | |
2d966958 WD |
80 | */ |
81 | ||
82 | ||
83 | #include <common.h> | |
2d966958 | 84 | #include <command.h> |
a9f51c9b | 85 | #include <environment.h> |
2d966958 | 86 | #include <net.h> |
4545f4e6 | 87 | #if defined(CONFIG_STATUS_LED) |
fc3e2165 | 88 | #include <miiphy.h> |
4545f4e6 | 89 | #include <status_led.h> |
fc3e2165 | 90 | #endif |
4545f4e6 JH |
91 | #include <watchdog.h> |
92 | #include <linux/compiler.h> | |
93 | #include "arp.h" | |
94 | #include "bootp.h" | |
f575ae1f | 95 | #include "cdp.h" |
1a32bf41 RG |
96 | #if defined(CONFIG_CMD_DNS) |
97 | #include "dns.h" | |
98 | #endif | |
d22c338e | 99 | #include "link_local.h" |
4545f4e6 | 100 | #include "nfs.h" |
a36b12f9 | 101 | #include "ping.h" |
4545f4e6 JH |
102 | #include "rarp.h" |
103 | #if defined(CONFIG_CMD_SNTP) | |
104 | #include "sntp.h" | |
105 | #endif | |
106 | #include "tftp.h" | |
2d966958 | 107 | |
d87080b7 WD |
108 | DECLARE_GLOBAL_DATA_PTR; |
109 | ||
2d966958 WD |
110 | /** BOOTP EXTENTIONS **/ |
111 | ||
3e38e429 | 112 | /* Our subnet mask (0=unknown) */ |
c586ce6e | 113 | IPaddr_t NetOurSubnetMask; |
3e38e429 | 114 | /* Our gateways IP address */ |
c586ce6e | 115 | IPaddr_t NetOurGatewayIP; |
3e38e429 | 116 | /* Our DNS IP address */ |
c586ce6e | 117 | IPaddr_t NetOurDNSIP; |
1fe80d79 | 118 | #if defined(CONFIG_BOOTP_DNS2) |
3e38e429 | 119 | /* Our 2nd DNS IP address */ |
c586ce6e | 120 | IPaddr_t NetOurDNS2IP; |
3e38e429 LC |
121 | #endif |
122 | /* Our NIS domain */ | |
c586ce6e | 123 | char NetOurNISDomain[32] = {0,}; |
3e38e429 | 124 | /* Our hostname */ |
c586ce6e | 125 | char NetOurHostName[32] = {0,}; |
3e38e429 | 126 | /* Our bootpath */ |
c586ce6e | 127 | char NetOurRootPath[64] = {0,}; |
3e38e429 | 128 | /* Our bootfile size in blocks */ |
c586ce6e | 129 | ushort NetBootFileSize; |
2d966958 | 130 | |
53a5c424 DU |
131 | #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ |
132 | IPaddr_t Mcast_addr; | |
133 | #endif | |
134 | ||
2d966958 WD |
135 | /** END OF BOOTP EXTENTIONS **/ |
136 | ||
3e38e429 LC |
137 | /* The actual transferred size of the bootfile (in bytes) */ |
138 | ulong NetBootFileXferSize; | |
139 | /* Our ethernet address */ | |
140 | uchar NetOurEther[6]; | |
141 | /* Boot server enet address */ | |
c586ce6e | 142 | uchar NetServerEther[6]; |
3e38e429 LC |
143 | /* Our IP addr (0 = unknown) */ |
144 | IPaddr_t NetOurIP; | |
145 | /* Server IP addr (0 = unknown) */ | |
146 | IPaddr_t NetServerIP; | |
147 | /* Current receive packet */ | |
db288a96 | 148 | uchar *NetRxPacket; |
3e38e429 LC |
149 | /* Current rx packet length */ |
150 | int NetRxPacketLen; | |
151 | /* IP packet ID */ | |
152 | unsigned NetIPID; | |
153 | /* Ethernet bcast address */ | |
c586ce6e LC |
154 | uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
155 | uchar NetEtherNullAddr[6]; | |
f85b6071 | 156 | #ifdef CONFIG_API |
db288a96 | 157 | void (*push_packet)(void *, int len) = 0; |
f85b6071 | 158 | #endif |
3e38e429 | 159 | /* Network loop state */ |
22f6e99d | 160 | enum net_loop_state net_state; |
3e38e429 | 161 | /* Tried all network devices */ |
c586ce6e | 162 | int NetRestartWrap; |
3e38e429 | 163 | /* Network loop restarted */ |
c586ce6e | 164 | static int NetRestarted; |
3e38e429 | 165 | /* At least one device configured */ |
c586ce6e | 166 | static int NetDevExists; |
2d966958 | 167 | |
6e592385 | 168 | /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ |
3e38e429 LC |
169 | /* default is without VLAN */ |
170 | ushort NetOurVLAN = 0xFFFF; | |
171 | /* ditto */ | |
172 | ushort NetOurNativeVLAN = 0xFFFF; | |
a3d991bd | 173 | |
3e38e429 LC |
174 | /* Boot File name */ |
175 | char BootFile[128]; | |
2d966958 | 176 | |
643d1ab2 | 177 | #if defined(CONFIG_CMD_SNTP) |
3e38e429 LC |
178 | /* NTP server IP address */ |
179 | IPaddr_t NetNtpServerIP; | |
180 | /* offset time from UTC */ | |
c586ce6e | 181 | int NetTimeOffset; |
ea287deb WD |
182 | #endif |
183 | ||
06370590 | 184 | static uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; |
2d966958 | 185 | |
3e38e429 | 186 | /* Receive packet */ |
db288a96 | 187 | uchar *NetRxPackets[PKTBUFSRX]; |
2d966958 | 188 | |
ece223b5 JH |
189 | /* Current UDP RX packet handler */ |
190 | static rxhand_f *udp_packet_handler; | |
191 | /* Current ARP RX packet handler */ | |
192 | static rxhand_f *arp_packet_handler; | |
39bccd21 | 193 | #ifdef CONFIG_CMD_TFTPPUT |
ece223b5 JH |
194 | /* Current ICMP rx handler */ |
195 | static rxhand_icmp_f *packet_icmp_handler; | |
39bccd21 | 196 | #endif |
3e38e429 LC |
197 | /* Current timeout handler */ |
198 | static thand_f *timeHandler; | |
199 | /* Time base value */ | |
200 | static ulong timeStart; | |
201 | /* Current timeout value */ | |
202 | static ulong timeDelta; | |
203 | /* THE transmit packet */ | |
db288a96 | 204 | uchar *NetTxPacket; |
2d966958 | 205 | |
e4bf0c5c | 206 | static int net_check_prereq(enum proto_t protocol); |
2d966958 | 207 | |
67b96e87 RB |
208 | static int NetTryCount; |
209 | ||
73a8b27c WD |
210 | /**********************************************************************/ |
211 | ||
a9f51c9b JH |
212 | static int on_bootfile(const char *name, const char *value, enum env_op op, |
213 | int flags) | |
214 | { | |
215 | switch (op) { | |
216 | case env_op_create: | |
217 | case env_op_overwrite: | |
218 | copy_filename(BootFile, value, sizeof(BootFile)); | |
219 | break; | |
220 | default: | |
221 | break; | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | U_BOOT_ENV_CALLBACK(bootfile, on_bootfile); | |
227 | ||
e4a3d57d SG |
228 | /* |
229 | * Check if autoload is enabled. If so, use either NFS or TFTP to download | |
230 | * the boot file. | |
231 | */ | |
232 | void net_auto_load(void) | |
233 | { | |
ec8a252c | 234 | #if defined(CONFIG_CMD_NFS) |
e4a3d57d SG |
235 | const char *s = getenv("autoload"); |
236 | ||
ec8a252c JH |
237 | if (s != NULL && strcmp(s, "NFS") == 0) { |
238 | /* | |
239 | * Use NFS to load the bootfile. | |
240 | */ | |
241 | NfsStart(); | |
242 | return; | |
243 | } | |
e4a3d57d | 244 | #endif |
ec8a252c JH |
245 | if (getenv_yesno("autoload") == 0) { |
246 | /* | |
247 | * Just use BOOTP/RARP to configure system; | |
248 | * Do not use TFTP to load the bootfile. | |
249 | */ | |
250 | net_set_state(NETLOOP_SUCCESS); | |
251 | return; | |
e4a3d57d SG |
252 | } |
253 | TftpStart(TFTPGET); | |
254 | } | |
255 | ||
cb1c9911 | 256 | static void NetInitLoop(void) |
2f70c49e | 257 | { |
c586ce6e | 258 | static int env_changed_id; |
4f63acd0 | 259 | int env_id = get_env_id(); |
2f70c49e HS |
260 | |
261 | /* update only when the environment has changed */ | |
3c172c4f | 262 | if (env_changed_id != env_id) { |
23a70bf9 | 263 | NetOurIP = getenv_IPaddr("ipaddr"); |
4f63acd0 LC |
264 | NetOurGatewayIP = getenv_IPaddr("gatewayip"); |
265 | NetOurSubnetMask = getenv_IPaddr("netmask"); | |
266 | NetServerIP = getenv_IPaddr("serverip"); | |
2f70c49e | 267 | NetOurNativeVLAN = getenv_VLAN("nvlan"); |
3c172c4f | 268 | NetOurVLAN = getenv_VLAN("vlan"); |
1a32bf41 RG |
269 | #if defined(CONFIG_CMD_DNS) |
270 | NetOurDNSIP = getenv_IPaddr("dnsip"); | |
271 | #endif | |
3c172c4f | 272 | env_changed_id = env_id; |
2f70c49e | 273 | } |
a03d6388 | 274 | memcpy(NetOurEther, eth_get_dev()->enetaddr, 6); |
3c172c4f | 275 | |
da95427c | 276 | return; |
2f70c49e HS |
277 | } |
278 | ||
ece223b5 JH |
279 | static void net_clear_handlers(void) |
280 | { | |
281 | net_set_udp_handler(NULL); | |
282 | net_set_arp_handler(NULL); | |
283 | NetSetTimeout(0, NULL); | |
284 | } | |
285 | ||
286 | static void net_cleanup_loop(void) | |
287 | { | |
288 | net_clear_handlers(); | |
289 | } | |
290 | ||
46c495d5 JH |
291 | void net_init(void) |
292 | { | |
293 | static int first_call = 1; | |
294 | ||
295 | if (first_call) { | |
296 | /* | |
297 | * Setup packet buffers, aligned correctly. | |
298 | */ | |
299 | int i; | |
300 | ||
301 | NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); | |
302 | NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; | |
303 | for (i = 0; i < PKTBUFSRX; i++) | |
304 | NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN; | |
305 | ||
306 | ArpInit(); | |
307 | net_clear_handlers(); | |
308 | ||
309 | /* Only need to setup buffer pointers once. */ | |
310 | first_call = 0; | |
311 | } | |
312 | ||
313 | NetInitLoop(); | |
314 | } | |
315 | ||
2d966958 WD |
316 | /**********************************************************************/ |
317 | /* | |
318 | * Main network processing loop. | |
319 | */ | |
320 | ||
e4bf0c5c | 321 | int NetLoop(enum proto_t protocol) |
2d966958 | 322 | { |
2d966958 | 323 | bd_t *bd = gd->bd; |
4793ee65 | 324 | int ret = -1; |
2d966958 | 325 | |
2d966958 WD |
326 | NetRestarted = 0; |
327 | NetDevExists = 0; | |
67b96e87 | 328 | NetTryCount = 1; |
4ef8d53c | 329 | debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n"); |
73a8b27c | 330 | |
573f14fe | 331 | bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start"); |
46c495d5 | 332 | net_init(); |
f8be7d65 | 333 | if (eth_is_on_demand_init() || protocol != NETCONS) { |
b1bf6f2c | 334 | eth_halt(); |
f8be7d65 JH |
335 | eth_set_current(); |
336 | if (eth_init(bd) < 0) { | |
337 | eth_halt(); | |
338 | return -1; | |
339 | } | |
340 | } else | |
341 | eth_init_state_only(bd); | |
2d966958 WD |
342 | |
343 | restart: | |
22f6e99d | 344 | net_set_state(NETLOOP_CONTINUE); |
2d966958 WD |
345 | |
346 | /* | |
347 | * Start the ball rolling with the given start function. From | |
348 | * here on, this code is a state machine driven by received | |
349 | * packets and timer events. | |
350 | */ | |
4ef8d53c | 351 | debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n"); |
cb1c9911 | 352 | NetInitLoop(); |
2d966958 | 353 | |
4f63acd0 | 354 | switch (net_check_prereq(protocol)) { |
2d966958 WD |
355 | case 1: |
356 | /* network not configured */ | |
b1bf6f2c | 357 | eth_halt(); |
92895de9 | 358 | return -1; |
2d966958 | 359 | |
2d966958 WD |
360 | case 2: |
361 | /* network device not configured */ | |
362 | break; | |
2d966958 WD |
363 | |
364 | case 0: | |
2d966958 | 365 | NetDevExists = 1; |
e4bf0c5c | 366 | NetBootFileXferSize = 0; |
2d966958 | 367 | switch (protocol) { |
e4bf0c5c | 368 | case TFTPGET: |
1fb7cd49 SG |
369 | #ifdef CONFIG_CMD_TFTPPUT |
370 | case TFTPPUT: | |
371 | #endif | |
2d966958 | 372 | /* always use ARP to get server ethernet address */ |
e4bf0c5c | 373 | TftpStart(protocol); |
2d966958 | 374 | break; |
7a83af07 LC |
375 | #ifdef CONFIG_CMD_TFTPSRV |
376 | case TFTPSRV: | |
377 | TftpStartServer(); | |
378 | break; | |
379 | #endif | |
643d1ab2 | 380 | #if defined(CONFIG_CMD_DHCP) |
2d966958 | 381 | case DHCP: |
d407bf52 | 382 | BootpTry = 0; |
09133f85 | 383 | NetOurIP = 0; |
2d966958 WD |
384 | DhcpRequest(); /* Basically same as BOOTP */ |
385 | break; | |
610f2e9c | 386 | #endif |
2d966958 WD |
387 | |
388 | case BOOTP: | |
389 | BootpTry = 0; | |
09133f85 | 390 | NetOurIP = 0; |
4f63acd0 | 391 | BootpRequest(); |
2d966958 WD |
392 | break; |
393 | ||
bf6cb247 | 394 | #if defined(CONFIG_CMD_RARP) |
2d966958 WD |
395 | case RARP: |
396 | RarpTry = 0; | |
09133f85 | 397 | NetOurIP = 0; |
4f63acd0 | 398 | RarpRequest(); |
2d966958 | 399 | break; |
bf6cb247 | 400 | #endif |
643d1ab2 | 401 | #if defined(CONFIG_CMD_PING) |
73a8b27c | 402 | case PING: |
a36b12f9 | 403 | ping_start(); |
73a8b27c | 404 | break; |
cbd8a35c | 405 | #endif |
643d1ab2 | 406 | #if defined(CONFIG_CMD_NFS) |
cbd8a35c WD |
407 | case NFS: |
408 | NfsStart(); | |
409 | break; | |
a3d991bd | 410 | #endif |
643d1ab2 | 411 | #if defined(CONFIG_CMD_CDP) |
a3d991bd WD |
412 | case CDP: |
413 | CDPStart(); | |
414 | break; | |
68ceb29e WD |
415 | #endif |
416 | #ifdef CONFIG_NETCONSOLE | |
417 | case NETCONS: | |
418 | NcStart(); | |
419 | break; | |
ea287deb | 420 | #endif |
643d1ab2 | 421 | #if defined(CONFIG_CMD_SNTP) |
ea287deb WD |
422 | case SNTP: |
423 | SntpStart(); | |
424 | break; | |
1a32bf41 RG |
425 | #endif |
426 | #if defined(CONFIG_CMD_DNS) | |
427 | case DNS: | |
428 | DnsStart(); | |
429 | break; | |
d22c338e JH |
430 | #endif |
431 | #if defined(CONFIG_CMD_LINK_LOCAL) | |
432 | case LINKLOCAL: | |
433 | link_local_start(); | |
434 | break; | |
73a8b27c | 435 | #endif |
2d966958 WD |
436 | default: |
437 | break; | |
438 | } | |
439 | ||
2d966958 WD |
440 | break; |
441 | } | |
442 | ||
643d1ab2 | 443 | #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) |
3e38e429 LC |
444 | #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ |
445 | defined(CONFIG_STATUS_LED) && \ | |
446 | defined(STATUS_LED_RED) | |
fc3e2165 | 447 | /* |
42d1f039 | 448 | * Echo the inverted link state to the fault LED. |
fc3e2165 | 449 | */ |
d3c65b01 | 450 | if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) |
4f63acd0 | 451 | status_led_set(STATUS_LED_RED, STATUS_LED_OFF); |
d3c65b01 | 452 | else |
4f63acd0 | 453 | status_led_set(STATUS_LED_RED, STATUS_LED_ON); |
6d0f6bcf | 454 | #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ |
fc3e2165 | 455 | #endif /* CONFIG_MII, ... */ |
2d966958 WD |
456 | |
457 | /* | |
458 | * Main packet reception loop. Loop receiving packets until | |
22f6e99d | 459 | * someone sets `net_state' to a state that terminates. |
2d966958 WD |
460 | */ |
461 | for (;;) { | |
462 | WATCHDOG_RESET(); | |
463 | #ifdef CONFIG_SHOW_ACTIVITY | |
48522bb5 | 464 | show_activity(1); |
2d966958 WD |
465 | #endif |
466 | /* | |
467 | * Check the ethernet for a new packet. The ethernet | |
468 | * receive routine will process it. | |
469 | */ | |
40cb90ee | 470 | eth_rx(); |
2d966958 WD |
471 | |
472 | /* | |
473 | * Abort if ctrl-c was pressed. | |
474 | */ | |
475 | if (ctrlc()) { | |
e94070c4 JH |
476 | /* cancel any ARP that may not have completed */ |
477 | NetArpWaitPacketIP = 0; | |
478 | ||
ece223b5 | 479 | net_cleanup_loop(); |
8bde7f77 | 480 | eth_halt(); |
f8be7d65 JH |
481 | /* Invalidate the last protocol */ |
482 | eth_set_last_protocol(BOOTP); | |
483 | ||
4f63acd0 | 484 | puts("\nAbort\n"); |
4ef8d53c JH |
485 | /* include a debug print as well incase the debug |
486 | messages are directed to stderr */ | |
487 | debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n"); | |
4793ee65 | 488 | goto done; |
2d966958 WD |
489 | } |
490 | ||
73a8b27c | 491 | ArpTimeoutCheck(); |
2d966958 WD |
492 | |
493 | /* | |
494 | * Check for a timeout, and run the timeout handler | |
495 | * if we have one. | |
496 | */ | |
e0ac62d7 | 497 | if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { |
2d966958 WD |
498 | thand_f *x; |
499 | ||
643d1ab2 | 500 | #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) |
4f63acd0 LC |
501 | #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ |
502 | defined(CONFIG_STATUS_LED) && \ | |
503 | defined(STATUS_LED_RED) | |
fc3e2165 | 504 | /* |
42d1f039 | 505 | * Echo the inverted link state to the fault LED. |
fc3e2165 | 506 | */ |
4f63acd0 | 507 | if (miiphy_link(eth_get_dev()->name, |
3e38e429 | 508 | CONFIG_SYS_FAULT_MII_ADDR)) { |
4f63acd0 | 509 | status_led_set(STATUS_LED_RED, STATUS_LED_OFF); |
fc3e2165 | 510 | } else { |
4f63acd0 | 511 | status_led_set(STATUS_LED_RED, STATUS_LED_ON); |
fc3e2165 | 512 | } |
4f63acd0 | 513 | #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ |
fc3e2165 | 514 | #endif /* CONFIG_MII, ... */ |
4ef8d53c | 515 | debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n"); |
2d966958 WD |
516 | x = timeHandler; |
517 | timeHandler = (thand_f *)0; | |
518 | (*x)(); | |
519 | } | |
520 | ||
521 | ||
22f6e99d | 522 | switch (net_state) { |
2d966958 WD |
523 | |
524 | case NETLOOP_RESTART: | |
2d966958 | 525 | NetRestarted = 1; |
2d966958 WD |
526 | goto restart; |
527 | ||
528 | case NETLOOP_SUCCESS: | |
ece223b5 | 529 | net_cleanup_loop(); |
2d966958 | 530 | if (NetBootFileXferSize > 0) { |
2d966958 WD |
531 | printf("Bytes transferred = %ld (%lx hex)\n", |
532 | NetBootFileXferSize, | |
533 | NetBootFileXferSize); | |
978226da SG |
534 | setenv_hex("filesize", NetBootFileXferSize); |
535 | setenv_hex("fileaddr", load_addr); | |
2d966958 | 536 | } |
f8be7d65 JH |
537 | if (protocol != NETCONS) |
538 | eth_halt(); | |
539 | else | |
540 | eth_halt_state_only(); | |
541 | ||
542 | eth_set_last_protocol(protocol); | |
543 | ||
4793ee65 | 544 | ret = NetBootFileXferSize; |
4ef8d53c | 545 | debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n"); |
4793ee65 | 546 | goto done; |
2d966958 WD |
547 | |
548 | case NETLOOP_FAIL: | |
ece223b5 | 549 | net_cleanup_loop(); |
f8be7d65 JH |
550 | /* Invalidate the last protocol */ |
551 | eth_set_last_protocol(BOOTP); | |
4ef8d53c | 552 | debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n"); |
4793ee65 | 553 | goto done; |
22f6e99d JH |
554 | |
555 | case NETLOOP_CONTINUE: | |
556 | continue; | |
2d966958 WD |
557 | } |
558 | } | |
4793ee65 SG |
559 | |
560 | done: | |
39bccd21 | 561 | #ifdef CONFIG_CMD_TFTPPUT |
4793ee65 | 562 | /* Clear out the handlers */ |
ece223b5 | 563 | net_set_udp_handler(NULL); |
4793ee65 | 564 | net_set_icmp_handler(NULL); |
39bccd21 | 565 | #endif |
4793ee65 | 566 | return ret; |
2d966958 WD |
567 | } |
568 | ||
569 | /**********************************************************************/ | |
570 | ||
571 | static void | |
572 | startAgainTimeout(void) | |
573 | { | |
22f6e99d | 574 | net_set_state(NETLOOP_RESTART); |
2d966958 WD |
575 | } |
576 | ||
4f63acd0 | 577 | void NetStartAgain(void) |
2d966958 | 578 | { |
6e592385 | 579 | char *nretry; |
67b96e87 RB |
580 | int retry_forever = 0; |
581 | unsigned long retrycnt = 0; | |
582 | ||
583 | nretry = getenv("netretry"); | |
584 | if (nretry) { | |
585 | if (!strcmp(nretry, "yes")) | |
586 | retry_forever = 1; | |
587 | else if (!strcmp(nretry, "no")) | |
588 | retrycnt = 0; | |
589 | else if (!strcmp(nretry, "once")) | |
590 | retrycnt = 1; | |
591 | else | |
592 | retrycnt = simple_strtoul(nretry, NULL, 0); | |
593 | } else | |
594 | retry_forever = 1; | |
595 | ||
596 | if ((!retry_forever) && (NetTryCount >= retrycnt)) { | |
597 | eth_halt(); | |
22f6e99d | 598 | net_set_state(NETLOOP_FAIL); |
a3d991bd WD |
599 | return; |
600 | } | |
67b96e87 RB |
601 | |
602 | NetTryCount++; | |
603 | ||
4f63acd0 | 604 | eth_halt(); |
8b0c5c12 | 605 | #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) |
4f63acd0 | 606 | eth_try_another(!NetRestarted); |
8b0c5c12 | 607 | #endif |
4f63acd0 | 608 | eth_init(gd->bd); |
6e592385 | 609 | if (NetRestartWrap) { |
2d966958 | 610 | NetRestartWrap = 0; |
67b96e87 | 611 | if (NetDevExists) { |
4f63acd0 | 612 | NetSetTimeout(10000UL, startAgainTimeout); |
ece223b5 | 613 | net_set_udp_handler(NULL); |
6e592385 | 614 | } else { |
22f6e99d | 615 | net_set_state(NETLOOP_FAIL); |
2d966958 | 616 | } |
6e592385 | 617 | } else { |
22f6e99d | 618 | net_set_state(NETLOOP_RESTART); |
2d966958 | 619 | } |
2d966958 WD |
620 | } |
621 | ||
622 | /**********************************************************************/ | |
623 | /* | |
624 | * Miscelaneous bits. | |
625 | */ | |
626 | ||
ece223b5 JH |
627 | static void dummy_handler(uchar *pkt, unsigned dport, |
628 | IPaddr_t sip, unsigned sport, | |
629 | unsigned len) | |
d280d3f4 | 630 | { |
d280d3f4 JH |
631 | } |
632 | ||
ece223b5 JH |
633 | rxhand_f *net_get_udp_handler(void) |
634 | { | |
635 | return udp_packet_handler; | |
636 | } | |
d280d3f4 | 637 | |
ece223b5 JH |
638 | void net_set_udp_handler(rxhand_f *f) |
639 | { | |
4ef8d53c | 640 | debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f); |
ece223b5 JH |
641 | if (f == NULL) |
642 | udp_packet_handler = dummy_handler; | |
643 | else | |
644 | udp_packet_handler = f; | |
645 | } | |
646 | ||
647 | rxhand_f *net_get_arp_handler(void) | |
2d966958 | 648 | { |
ece223b5 JH |
649 | return arp_packet_handler; |
650 | } | |
651 | ||
652 | void net_set_arp_handler(rxhand_f *f) | |
653 | { | |
4ef8d53c | 654 | debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f); |
ece223b5 JH |
655 | if (f == NULL) |
656 | arp_packet_handler = dummy_handler; | |
657 | else | |
658 | arp_packet_handler = f; | |
2d966958 WD |
659 | } |
660 | ||
39bccd21 | 661 | #ifdef CONFIG_CMD_TFTPPUT |
4793ee65 SG |
662 | void net_set_icmp_handler(rxhand_icmp_f *f) |
663 | { | |
664 | packet_icmp_handler = f; | |
665 | } | |
39bccd21 | 666 | #endif |
2d966958 WD |
667 | |
668 | void | |
6b147d11 | 669 | NetSetTimeout(ulong iv, thand_f *f) |
2d966958 WD |
670 | { |
671 | if (iv == 0) { | |
4ef8d53c JH |
672 | debug_cond(DEBUG_INT_STATE, |
673 | "--- NetLoop timeout handler cancelled\n"); | |
2d966958 WD |
674 | timeHandler = (thand_f *)0; |
675 | } else { | |
4ef8d53c JH |
676 | debug_cond(DEBUG_INT_STATE, |
677 | "--- NetLoop timeout handler set (%p)\n", f); | |
2d966958 | 678 | timeHandler = f; |
e0ac62d7 | 679 | timeStart = get_timer(0); |
1389f98f | 680 | timeDelta = iv * CONFIG_SYS_HZ / 1000; |
2d966958 WD |
681 | } |
682 | } | |
683 | ||
206d07fd JH |
684 | int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, |
685 | int payload_len) | |
73a8b27c | 686 | { |
a3d991bd | 687 | uchar *pkt; |
9214637a JH |
688 | int eth_hdr_size; |
689 | int pkt_hdr_size; | |
a3d991bd | 690 | |
46c495d5 JH |
691 | /* make sure the NetTxPacket is initialized (NetInit() was called) */ |
692 | assert(NetTxPacket != NULL); | |
693 | if (NetTxPacket == NULL) | |
694 | return -1; | |
695 | ||
73a8b27c WD |
696 | /* convert to new style broadcast */ |
697 | if (dest == 0) | |
698 | dest = 0xFFFFFFFF; | |
699 | ||
700 | /* if broadcast, make the ether address a broadcast and don't do ARP */ | |
701 | if (dest == 0xFFFFFFFF) | |
702 | ether = NetBcastAddr; | |
703 | ||
e94070c4 | 704 | pkt = (uchar *)NetTxPacket; |
9214637a JH |
705 | |
706 | eth_hdr_size = NetSetEther(pkt, ether, PROT_IP); | |
707 | pkt += eth_hdr_size; | |
708 | net_set_udp_header(pkt, dest, dport, sport, payload_len); | |
709 | pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE; | |
73a8b27c | 710 | |
e94070c4 JH |
711 | /* if MAC address was not discovered yet, do an ARP request */ |
712 | if (memcmp(ether, NetEtherNullAddr, 6) == 0) { | |
4ef8d53c | 713 | debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest); |
0ebf04c6 | 714 | |
9214637a | 715 | /* save the ip and eth addr for the packet to send after arp */ |
73a8b27c WD |
716 | NetArpWaitPacketIP = dest; |
717 | NetArpWaitPacketMAC = ether; | |
a3d991bd | 718 | |
73a8b27c | 719 | /* size of the waiting packet */ |
9214637a | 720 | NetArpWaitTxPacketSize = pkt_hdr_size + payload_len; |
73a8b27c WD |
721 | |
722 | /* and do the ARP request */ | |
723 | NetArpWaitTry = 1; | |
724 | NetArpWaitTimerStart = get_timer(0); | |
725 | ArpRequest(); | |
726 | return 1; /* waiting */ | |
9214637a | 727 | } else { |
4ef8d53c JH |
728 | debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n", |
729 | &dest, ether); | |
adf5d93e | 730 | NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len); |
9214637a | 731 | return 0; /* transmitted */ |
73a8b27c | 732 | } |
73a8b27c WD |
733 | } |
734 | ||
5cfaa4e5 AR |
735 | #ifdef CONFIG_IP_DEFRAG |
736 | /* | |
737 | * This function collects fragments in a single packet, according | |
738 | * to the algorithm in RFC815. It returns NULL or the pointer to | |
739 | * a complete packet, in static storage | |
740 | */ | |
741 | #ifndef CONFIG_NET_MAXDEFRAG | |
742 | #define CONFIG_NET_MAXDEFRAG 16384 | |
743 | #endif | |
744 | /* | |
745 | * MAXDEFRAG, above, is chosen in the config file and is real data | |
746 | * so we need to add the NFS overhead, which is more than TFTP. | |
747 | * To use sizeof in the internal unnamed structures, we need a real | |
748 | * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately). | |
749 | * The compiler doesn't complain nor allocates the actual structure | |
750 | */ | |
751 | static struct rpc_t rpc_specimen; | |
752 | #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply)) | |
753 | ||
c5c59df0 | 754 | #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE) |
5cfaa4e5 AR |
755 | |
756 | /* | |
757 | * this is the packet being assembled, either data or frag control. | |
758 | * Fragments go by 8 bytes, so this union must be 8 bytes long | |
759 | */ | |
760 | struct hole { | |
761 | /* first_byte is address of this structure */ | |
762 | u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ | |
763 | u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ | |
764 | u16 prev_hole; /* index of prev, 0 == none */ | |
765 | u16 unused; | |
766 | }; | |
767 | ||
594c26f8 | 768 | static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp) |
5cfaa4e5 | 769 | { |
48522bb5 | 770 | static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN); |
5cfaa4e5 AR |
771 | static u16 first_hole, total_len; |
772 | struct hole *payload, *thisfrag, *h, *newh; | |
594c26f8 | 773 | struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff; |
5cfaa4e5 AR |
774 | uchar *indata = (uchar *)ip; |
775 | int offset8, start, len, done = 0; | |
776 | u16 ip_off = ntohs(ip->ip_off); | |
777 | ||
778 | /* payload starts after IP header, this fragment is in there */ | |
c5c59df0 | 779 | payload = (struct hole *)(pkt_buff + IP_HDR_SIZE); |
5cfaa4e5 AR |
780 | offset8 = (ip_off & IP_OFFS); |
781 | thisfrag = payload + offset8; | |
782 | start = offset8 * 8; | |
c5c59df0 | 783 | len = ntohs(ip->ip_len) - IP_HDR_SIZE; |
5cfaa4e5 AR |
784 | |
785 | if (start + len > IP_MAXUDP) /* fragment extends too far */ | |
786 | return NULL; | |
787 | ||
788 | if (!total_len || localip->ip_id != ip->ip_id) { | |
789 | /* new (or different) packet, reset structs */ | |
790 | total_len = 0xffff; | |
791 | payload[0].last_byte = ~0; | |
792 | payload[0].next_hole = 0; | |
793 | payload[0].prev_hole = 0; | |
794 | first_hole = 0; | |
795 | /* any IP header will work, copy the first we received */ | |
c5c59df0 | 796 | memcpy(localip, ip, IP_HDR_SIZE); |
5cfaa4e5 AR |
797 | } |
798 | ||
799 | /* | |
800 | * What follows is the reassembly algorithm. We use the payload | |
801 | * array as a linked list of hole descriptors, as each hole starts | |
802 | * at a multiple of 8 bytes. However, last byte can be whatever value, | |
803 | * so it is represented as byte count, not as 8-byte blocks. | |
804 | */ | |
805 | ||
806 | h = payload + first_hole; | |
807 | while (h->last_byte < start) { | |
808 | if (!h->next_hole) { | |
809 | /* no hole that far away */ | |
810 | return NULL; | |
811 | } | |
812 | h = payload + h->next_hole; | |
813 | } | |
814 | ||
e397e59e FS |
815 | /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ |
816 | if (offset8 + ((len + 7) / 8) <= h - payload) { | |
5cfaa4e5 AR |
817 | /* no overlap with holes (dup fragment?) */ |
818 | return NULL; | |
819 | } | |
820 | ||
821 | if (!(ip_off & IP_FLAGS_MFRAG)) { | |
822 | /* no more fragmentss: truncate this (last) hole */ | |
823 | total_len = start + len; | |
824 | h->last_byte = start + len; | |
825 | } | |
826 | ||
827 | /* | |
828 | * There is some overlap: fix the hole list. This code doesn't | |
829 | * deal with a fragment that overlaps with two different holes | |
830 | * (thus being a superset of a previously-received fragment). | |
831 | */ | |
832 | ||
4f63acd0 | 833 | if ((h >= thisfrag) && (h->last_byte <= start + len)) { |
5cfaa4e5 AR |
834 | /* complete overlap with hole: remove hole */ |
835 | if (!h->prev_hole && !h->next_hole) { | |
836 | /* last remaining hole */ | |
837 | done = 1; | |
838 | } else if (!h->prev_hole) { | |
839 | /* first hole */ | |
840 | first_hole = h->next_hole; | |
841 | payload[h->next_hole].prev_hole = 0; | |
842 | } else if (!h->next_hole) { | |
843 | /* last hole */ | |
844 | payload[h->prev_hole].next_hole = 0; | |
845 | } else { | |
846 | /* in the middle of the list */ | |
847 | payload[h->next_hole].prev_hole = h->prev_hole; | |
848 | payload[h->prev_hole].next_hole = h->next_hole; | |
849 | } | |
850 | ||
851 | } else if (h->last_byte <= start + len) { | |
852 | /* overlaps with final part of the hole: shorten this hole */ | |
853 | h->last_byte = start; | |
854 | ||
855 | } else if (h >= thisfrag) { | |
856 | /* overlaps with initial part of the hole: move this hole */ | |
857 | newh = thisfrag + (len / 8); | |
858 | *newh = *h; | |
859 | h = newh; | |
860 | if (h->next_hole) | |
861 | payload[h->next_hole].prev_hole = (h - payload); | |
862 | if (h->prev_hole) | |
863 | payload[h->prev_hole].next_hole = (h - payload); | |
864 | else | |
865 | first_hole = (h - payload); | |
866 | ||
867 | } else { | |
868 | /* fragment sits in the middle: split the hole */ | |
869 | newh = thisfrag + (len / 8); | |
870 | *newh = *h; | |
871 | h->last_byte = start; | |
872 | h->next_hole = (newh - payload); | |
873 | newh->prev_hole = (h - payload); | |
874 | if (newh->next_hole) | |
875 | payload[newh->next_hole].prev_hole = (newh - payload); | |
876 | } | |
877 | ||
878 | /* finally copy this fragment and possibly return whole packet */ | |
c5c59df0 | 879 | memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len); |
5cfaa4e5 AR |
880 | if (!done) |
881 | return NULL; | |
882 | ||
883 | localip->ip_len = htons(total_len); | |
c5c59df0 | 884 | *lenp = total_len + IP_HDR_SIZE; |
5cfaa4e5 AR |
885 | return localip; |
886 | } | |
887 | ||
594c26f8 | 888 | static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) |
5cfaa4e5 AR |
889 | { |
890 | u16 ip_off = ntohs(ip->ip_off); | |
891 | if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) | |
892 | return ip; /* not a fragment */ | |
893 | return __NetDefragment(ip, lenp); | |
894 | } | |
895 | ||
896 | #else /* !CONFIG_IP_DEFRAG */ | |
897 | ||
594c26f8 | 898 | static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) |
5cfaa4e5 AR |
899 | { |
900 | u16 ip_off = ntohs(ip->ip_off); | |
901 | if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) | |
902 | return ip; /* not a fragment */ | |
903 | return NULL; | |
904 | } | |
905 | #endif | |
a3d991bd | 906 | |
8f79bb17 SG |
907 | /** |
908 | * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently | |
909 | * drop others. | |
910 | * | |
911 | * @parma ip IP packet containing the ICMP | |
912 | */ | |
594c26f8 | 913 | static void receive_icmp(struct ip_udp_hdr *ip, int len, |
cb487f56 | 914 | IPaddr_t src_ip, struct ethernet_hdr *et) |
8f79bb17 | 915 | { |
e0a63079 | 916 | struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src; |
8f79bb17 SG |
917 | |
918 | switch (icmph->type) { | |
919 | case ICMP_REDIRECT: | |
920 | if (icmph->code != ICMP_REDIR_HOST) | |
921 | return; | |
922 | printf(" ICMP Host Redirect to %pI4 ", | |
923 | &icmph->un.gateway); | |
924 | break; | |
a36b12f9 | 925 | default: |
8f79bb17 | 926 | #if defined(CONFIG_CMD_PING) |
a36b12f9 | 927 | ping_receive(et, ip, len); |
8f79bb17 | 928 | #endif |
39bccd21 | 929 | #ifdef CONFIG_CMD_TFTPPUT |
4793ee65 SG |
930 | if (packet_icmp_handler) |
931 | packet_icmp_handler(icmph->type, icmph->code, | |
932 | ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src), | |
933 | icmph->un.data, ntohs(ip->udp_len)); | |
39bccd21 | 934 | #endif |
8f79bb17 SG |
935 | break; |
936 | } | |
937 | } | |
938 | ||
2d966958 | 939 | void |
db288a96 | 940 | NetReceive(uchar *inpkt, int len) |
2d966958 | 941 | { |
cb487f56 | 942 | struct ethernet_hdr *et; |
594c26f8 | 943 | struct ip_udp_hdr *ip; |
8d353eb8 | 944 | IPaddr_t dst_ip; |
03eb129f | 945 | IPaddr_t src_ip; |
8d353eb8 | 946 | int eth_proto; |
643d1ab2 | 947 | #if defined(CONFIG_CMD_CDP) |
a3d991bd WD |
948 | int iscdp; |
949 | #endif | |
950 | ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; | |
951 | ||
4ef8d53c | 952 | debug_cond(DEBUG_NET_PKT, "packet received\n"); |
2d966958 | 953 | |
d9bec9f4 MF |
954 | NetRxPacket = inpkt; |
955 | NetRxPacketLen = len; | |
cb487f56 | 956 | et = (struct ethernet_hdr *)inpkt; |
a3d991bd WD |
957 | |
958 | /* too small packet? */ | |
959 | if (len < ETHER_HDR_SIZE) | |
960 | return; | |
961 | ||
f85b6071 RJ |
962 | #ifdef CONFIG_API |
963 | if (push_packet) { | |
964 | (*push_packet)(inpkt, len); | |
965 | return; | |
966 | } | |
967 | #endif | |
968 | ||
643d1ab2 | 969 | #if defined(CONFIG_CMD_CDP) |
a3d991bd | 970 | /* keep track if packet is CDP */ |
17351883 | 971 | iscdp = is_cdp_packet(et->et_dest); |
a3d991bd WD |
972 | #endif |
973 | ||
974 | myvlanid = ntohs(NetOurVLAN); | |
975 | if (myvlanid == (ushort)-1) | |
976 | myvlanid = VLAN_NONE; | |
977 | mynvlanid = ntohs(NetOurNativeVLAN); | |
978 | if (mynvlanid == (ushort)-1) | |
979 | mynvlanid = VLAN_NONE; | |
2d966958 | 980 | |
8d353eb8 | 981 | eth_proto = ntohs(et->et_protlen); |
2d966958 | 982 | |
8d353eb8 | 983 | if (eth_proto < 1514) { |
cb487f56 | 984 | struct e802_hdr *et802 = (struct e802_hdr *)et; |
2d966958 | 985 | /* |
da5ebe2c JH |
986 | * Got a 802.2 packet. Check the other protocol field. |
987 | * XXX VLAN over 802.2+SNAP not implemented! | |
2d966958 | 988 | */ |
8d353eb8 | 989 | eth_proto = ntohs(et802->et_prot); |
a3d991bd | 990 | |
594c26f8 | 991 | ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE); |
2d966958 | 992 | len -= E802_HDR_SIZE; |
a3d991bd | 993 | |
8d353eb8 | 994 | } else if (eth_proto != PROT_VLAN) { /* normal packet */ |
594c26f8 | 995 | ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE); |
2d966958 | 996 | len -= ETHER_HDR_SIZE; |
a3d991bd WD |
997 | |
998 | } else { /* VLAN packet */ | |
c68cca35 JH |
999 | struct vlan_ethernet_hdr *vet = |
1000 | (struct vlan_ethernet_hdr *)et; | |
a3d991bd | 1001 | |
4ef8d53c | 1002 | debug_cond(DEBUG_NET_PKT, "VLAN packet received\n"); |
0ebf04c6 | 1003 | |
a3d991bd WD |
1004 | /* too small packet? */ |
1005 | if (len < VLAN_ETHER_HDR_SIZE) | |
1006 | return; | |
1007 | ||
1008 | /* if no VLAN active */ | |
1009 | if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE | |
643d1ab2 | 1010 | #if defined(CONFIG_CMD_CDP) |
a3d991bd WD |
1011 | && iscdp == 0 |
1012 | #endif | |
1013 | ) | |
1014 | return; | |
1015 | ||
1016 | cti = ntohs(vet->vet_tag); | |
1017 | vlanid = cti & VLAN_IDMASK; | |
8d353eb8 | 1018 | eth_proto = ntohs(vet->vet_type); |
a3d991bd | 1019 | |
594c26f8 | 1020 | ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE); |
a3d991bd | 1021 | len -= VLAN_ETHER_HDR_SIZE; |
2d966958 WD |
1022 | } |
1023 | ||
4ef8d53c | 1024 | debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto); |
2d966958 | 1025 | |
643d1ab2 | 1026 | #if defined(CONFIG_CMD_CDP) |
a3d991bd | 1027 | if (iscdp) { |
0b4c5ff4 | 1028 | cdp_receive((uchar *)ip, len); |
a3d991bd WD |
1029 | return; |
1030 | } | |
1031 | #endif | |
1032 | ||
1033 | if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { | |
1034 | if (vlanid == VLAN_NONE) | |
1035 | vlanid = (mynvlanid & VLAN_IDMASK); | |
1036 | /* not matched? */ | |
1037 | if (vlanid != (myvlanid & VLAN_IDMASK)) | |
1038 | return; | |
1039 | } | |
1040 | ||
8d353eb8 | 1041 | switch (eth_proto) { |
2d966958 WD |
1042 | |
1043 | case PROT_ARP: | |
d280d3f4 | 1044 | ArpReceive(et, ip, len); |
289f932c | 1045 | break; |
2d966958 | 1046 | |
bf6cb247 | 1047 | #ifdef CONFIG_CMD_RARP |
2d966958 | 1048 | case PROT_RARP: |
8b9c5322 | 1049 | rarp_receive(ip, len); |
2d966958 | 1050 | break; |
bf6cb247 | 1051 | #endif |
2d966958 | 1052 | case PROT_IP: |
4ef8d53c | 1053 | debug_cond(DEBUG_NET_PKT, "Got IP\n"); |
5cfaa4e5 | 1054 | /* Before we start poking the header, make sure it is there */ |
594c26f8 JH |
1055 | if (len < IP_UDP_HDR_SIZE) { |
1056 | debug("len bad %d < %lu\n", len, | |
1057 | (ulong)IP_UDP_HDR_SIZE); | |
2d966958 WD |
1058 | return; |
1059 | } | |
5cfaa4e5 | 1060 | /* Check the packet length */ |
2d966958 | 1061 | if (len < ntohs(ip->ip_len)) { |
4ef8d53c | 1062 | debug("len bad %d < %d\n", len, ntohs(ip->ip_len)); |
2d966958 WD |
1063 | return; |
1064 | } | |
1065 | len = ntohs(ip->ip_len); | |
4ef8d53c JH |
1066 | debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n", |
1067 | len, ip->ip_hl_v & 0xff); | |
0ebf04c6 | 1068 | |
5cfaa4e5 | 1069 | /* Can't deal with anything except IPv4 */ |
d3c65b01 | 1070 | if ((ip->ip_hl_v & 0xf0) != 0x40) |
2d966958 | 1071 | return; |
5cfaa4e5 | 1072 | /* Can't deal with IP options (headers != 20 bytes) */ |
d3c65b01 | 1073 | if ((ip->ip_hl_v & 0x0f) > 0x05) |
6b52cfe1 | 1074 | return; |
5cfaa4e5 | 1075 | /* Check the Checksum of the header */ |
c5c59df0 | 1076 | if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) { |
4ef8d53c | 1077 | debug("checksum bad\n"); |
2d966958 WD |
1078 | return; |
1079 | } | |
5cfaa4e5 | 1080 | /* If it is not for us, ignore it */ |
8d353eb8 JH |
1081 | dst_ip = NetReadIP(&ip->ip_dst); |
1082 | if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) { | |
53a5c424 | 1083 | #ifdef CONFIG_MCAST_TFTP |
8d353eb8 | 1084 | if (Mcast_addr != dst_ip) |
53a5c424 | 1085 | #endif |
c819abee | 1086 | return; |
2d966958 | 1087 | } |
03eb129f LC |
1088 | /* Read source IP address for later use */ |
1089 | src_ip = NetReadIP(&ip->ip_src); | |
5cfaa4e5 AR |
1090 | /* |
1091 | * The function returns the unchanged packet if it's not | |
1092 | * a fragment, and either the complete packet or NULL if | |
1093 | * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) | |
1094 | */ | |
ccb9ebef LC |
1095 | ip = NetDefragment(ip, &len); |
1096 | if (!ip) | |
5cfaa4e5 | 1097 | return; |
2d966958 WD |
1098 | /* |
1099 | * watch for ICMP host redirects | |
1100 | * | |
8bde7f77 WD |
1101 | * There is no real handler code (yet). We just watch |
1102 | * for ICMP host redirect messages. In case anybody | |
1103 | * sees these messages: please contact me | |
1104 | * (wd@denx.de), or - even better - send me the | |
1105 | * necessary fixes :-) | |
2d966958 | 1106 | * |
8bde7f77 WD |
1107 | * Note: in all cases where I have seen this so far |
1108 | * it was a problem with the router configuration, | |
1109 | * for instance when a router was configured in the | |
1110 | * BOOTP reply, but the TFTP server was on the same | |
1111 | * subnet. So this is probably a warning that your | |
1112 | * configuration might be wrong. But I'm not really | |
1113 | * sure if there aren't any other situations. | |
4793ee65 SG |
1114 | * |
1115 | * Simon Glass <sjg@chromium.org>: We get an ICMP when | |
1116 | * we send a tftp packet to a dead connection, or when | |
1117 | * there is no server at the other end. | |
2d966958 WD |
1118 | */ |
1119 | if (ip->ip_p == IPPROTO_ICMP) { | |
8f79bb17 SG |
1120 | receive_icmp(ip, len, src_ip, et); |
1121 | return; | |
2d966958 WD |
1122 | } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ |
1123 | return; | |
1124 | } | |
1125 | ||
4ef8d53c JH |
1126 | debug_cond(DEBUG_DEV_PKT, |
1127 | "received UDP (to=%pI4, from=%pI4, len=%d)\n", | |
1128 | &dst_ip, &src_ip, len); | |
1129 | ||
8534bf9a SR |
1130 | #ifdef CONFIG_UDP_CHECKSUM |
1131 | if (ip->udp_xsum != 0) { | |
b2f50807 | 1132 | ulong xsum; |
8534bf9a SR |
1133 | ushort *sumptr; |
1134 | ushort sumlen; | |
1135 | ||
1136 | xsum = ip->ip_p; | |
1137 | xsum += (ntohs(ip->udp_len)); | |
1138 | xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; | |
1139 | xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; | |
1140 | xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; | |
1141 | xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; | |
1142 | ||
1143 | sumlen = ntohs(ip->udp_len); | |
1144 | sumptr = (ushort *) &(ip->udp_src); | |
1145 | ||
1146 | while (sumlen > 1) { | |
b2f50807 | 1147 | ushort sumdata; |
8534bf9a SR |
1148 | |
1149 | sumdata = *sumptr++; | |
1150 | xsum += ntohs(sumdata); | |
1151 | sumlen -= 2; | |
1152 | } | |
1153 | if (sumlen > 0) { | |
b2f50807 | 1154 | ushort sumdata; |
8534bf9a SR |
1155 | |
1156 | sumdata = *(unsigned char *) sumptr; | |
b2f50807 | 1157 | sumdata = (sumdata << 8) & 0xff00; |
8534bf9a SR |
1158 | xsum += sumdata; |
1159 | } | |
1160 | while ((xsum >> 16) != 0) { | |
3e38e429 LC |
1161 | xsum = (xsum & 0x0000ffff) + |
1162 | ((xsum >> 16) & 0x0000ffff); | |
8534bf9a SR |
1163 | } |
1164 | if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { | |
9b55a253 WD |
1165 | printf(" UDP wrong checksum %08lx %08x\n", |
1166 | xsum, ntohs(ip->udp_xsum)); | |
8534bf9a SR |
1167 | return; |
1168 | } | |
1169 | } | |
1170 | #endif | |
1171 | ||
53a5c424 | 1172 | |
68ceb29e | 1173 | #ifdef CONFIG_NETCONSOLE |
594c26f8 | 1174 | nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE, |
8cab08e8 | 1175 | src_ip, |
594c26f8 JH |
1176 | ntohs(ip->udp_dst), |
1177 | ntohs(ip->udp_src), | |
1178 | ntohs(ip->udp_len) - UDP_HDR_SIZE); | |
68ceb29e | 1179 | #endif |
2d966958 WD |
1180 | /* |
1181 | * IP header OK. Pass the packet to the current handler. | |
1182 | */ | |
ece223b5 JH |
1183 | (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE, |
1184 | ntohs(ip->udp_dst), | |
1185 | src_ip, | |
1186 | ntohs(ip->udp_src), | |
1187 | ntohs(ip->udp_len) - UDP_HDR_SIZE); | |
2d966958 WD |
1188 | break; |
1189 | } | |
1190 | } | |
1191 | ||
1192 | ||
1193 | /**********************************************************************/ | |
1194 | ||
e4bf0c5c | 1195 | static int net_check_prereq(enum proto_t protocol) |
2d966958 WD |
1196 | { |
1197 | switch (protocol) { | |
6e592385 | 1198 | /* Fall through */ |
643d1ab2 | 1199 | #if defined(CONFIG_CMD_PING) |
73a8b27c | 1200 | case PING: |
6e592385 | 1201 | if (NetPingIP == 0) { |
4f63acd0 | 1202 | puts("*** ERROR: ping address not given\n"); |
92895de9 | 1203 | return 1; |
6e592385 WD |
1204 | } |
1205 | goto common; | |
cbd8a35c | 1206 | #endif |
643d1ab2 | 1207 | #if defined(CONFIG_CMD_SNTP) |
ea287deb WD |
1208 | case SNTP: |
1209 | if (NetNtpServerIP == 0) { | |
4f63acd0 | 1210 | puts("*** ERROR: NTP server address not given\n"); |
92895de9 | 1211 | return 1; |
ea287deb WD |
1212 | } |
1213 | goto common; | |
1214 | #endif | |
1a32bf41 RG |
1215 | #if defined(CONFIG_CMD_DNS) |
1216 | case DNS: | |
1217 | if (NetOurDNSIP == 0) { | |
1218 | puts("*** ERROR: DNS server address not given\n"); | |
1219 | return 1; | |
1220 | } | |
1221 | goto common; | |
1222 | #endif | |
643d1ab2 | 1223 | #if defined(CONFIG_CMD_NFS) |
cbd8a35c | 1224 | case NFS: |
73a8b27c | 1225 | #endif |
e4bf0c5c | 1226 | case TFTPGET: |
1fb7cd49 | 1227 | case TFTPPUT: |
6e592385 | 1228 | if (NetServerIP == 0) { |
4f63acd0 | 1229 | puts("*** ERROR: `serverip' not set\n"); |
92895de9 | 1230 | return 1; |
6e592385 | 1231 | } |
4f63acd0 LC |
1232 | #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ |
1233 | defined(CONFIG_CMD_DNS) | |
1234 | common: | |
73a8b27c | 1235 | #endif |
8b6bbe10 | 1236 | /* Fall through */ |
73a8b27c | 1237 | |
8b6bbe10 | 1238 | case NETCONS: |
7a83af07 | 1239 | case TFTPSRV: |
6e592385 | 1240 | if (NetOurIP == 0) { |
4f63acd0 | 1241 | puts("*** ERROR: `ipaddr' not set\n"); |
92895de9 | 1242 | return 1; |
6e592385 WD |
1243 | } |
1244 | /* Fall through */ | |
2d966958 | 1245 | |
bf6cb247 | 1246 | #ifdef CONFIG_CMD_RARP |
2d966958 | 1247 | case RARP: |
bf6cb247 | 1248 | #endif |
2d966958 | 1249 | case BOOTP: |
a3d991bd | 1250 | case CDP: |
bf6cb247 | 1251 | case DHCP: |
d22c338e | 1252 | case LINKLOCAL: |
4f63acd0 | 1253 | if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { |
4f63acd0 | 1254 | int num = eth_get_dev_index(); |
2d966958 | 1255 | |
6e592385 WD |
1256 | switch (num) { |
1257 | case -1: | |
4f63acd0 | 1258 | puts("*** ERROR: No ethernet found.\n"); |
92895de9 | 1259 | return 1; |
6e592385 | 1260 | case 0: |
4f63acd0 | 1261 | puts("*** ERROR: `ethaddr' not set\n"); |
2d966958 | 1262 | break; |
6e592385 | 1263 | default: |
4f63acd0 | 1264 | printf("*** ERROR: `eth%daddr' not set\n", |
2d966958 WD |
1265 | num); |
1266 | break; | |
6e592385 | 1267 | } |
2d966958 | 1268 | |
4f63acd0 | 1269 | NetStartAgain(); |
92895de9 | 1270 | return 2; |
6e592385 WD |
1271 | } |
1272 | /* Fall through */ | |
1273 | default: | |
92895de9 | 1274 | return 0; |
2d966958 | 1275 | } |
92895de9 | 1276 | return 0; /* OK */ |
2d966958 WD |
1277 | } |
1278 | /**********************************************************************/ | |
1279 | ||
1280 | int | |
6b147d11 | 1281 | NetCksumOk(uchar *ptr, int len) |
2d966958 WD |
1282 | { |
1283 | return !((NetCksum(ptr, len) + 1) & 0xfffe); | |
1284 | } | |
1285 | ||
1286 | ||
1287 | unsigned | |
6b147d11 | 1288 | NetCksum(uchar *ptr, int len) |
2d966958 WD |
1289 | { |
1290 | ulong xsum; | |
9d2a873b | 1291 | ushort *p = (ushort *)ptr; |
2d966958 WD |
1292 | |
1293 | xsum = 0; | |
1294 | while (len-- > 0) | |
7bc5ee07 | 1295 | xsum += *p++; |
2d966958 WD |
1296 | xsum = (xsum & 0xffff) + (xsum >> 16); |
1297 | xsum = (xsum & 0xffff) + (xsum >> 16); | |
92895de9 | 1298 | return xsum & 0xffff; |
2d966958 WD |
1299 | } |
1300 | ||
a3d991bd WD |
1301 | int |
1302 | NetEthHdrSize(void) | |
1303 | { | |
1304 | ushort myvlanid; | |
2d966958 | 1305 | |
a3d991bd WD |
1306 | myvlanid = ntohs(NetOurVLAN); |
1307 | if (myvlanid == (ushort)-1) | |
1308 | myvlanid = VLAN_NONE; | |
1309 | ||
3e38e429 LC |
1310 | return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : |
1311 | VLAN_ETHER_HDR_SIZE; | |
a3d991bd WD |
1312 | } |
1313 | ||
1314 | int | |
db288a96 | 1315 | NetSetEther(uchar *xet, uchar * addr, uint prot) |
2d966958 | 1316 | { |
cb487f56 | 1317 | struct ethernet_hdr *et = (struct ethernet_hdr *)xet; |
a3d991bd WD |
1318 | ushort myvlanid; |
1319 | ||
1320 | myvlanid = ntohs(NetOurVLAN); | |
1321 | if (myvlanid == (ushort)-1) | |
1322 | myvlanid = VLAN_NONE; | |
2d966958 | 1323 | |
4f63acd0 LC |
1324 | memcpy(et->et_dest, addr, 6); |
1325 | memcpy(et->et_src, NetOurEther, 6); | |
a3d991bd | 1326 | if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { |
c819abee | 1327 | et->et_protlen = htons(prot); |
a3d991bd WD |
1328 | return ETHER_HDR_SIZE; |
1329 | } else { | |
c68cca35 JH |
1330 | struct vlan_ethernet_hdr *vet = |
1331 | (struct vlan_ethernet_hdr *)xet; | |
2d966958 | 1332 | |
a3d991bd WD |
1333 | vet->vet_vlan_type = htons(PROT_VLAN); |
1334 | vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); | |
1335 | vet->vet_type = htons(prot); | |
1336 | return VLAN_ETHER_HDR_SIZE; | |
1337 | } | |
1338 | } | |
2d966958 | 1339 | |
e7111015 JH |
1340 | int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot) |
1341 | { | |
1342 | ushort protlen; | |
1343 | ||
1344 | memcpy(et->et_dest, addr, 6); | |
1345 | memcpy(et->et_src, NetOurEther, 6); | |
1346 | protlen = ntohs(et->et_protlen); | |
1347 | if (protlen == PROT_VLAN) { | |
1348 | struct vlan_ethernet_hdr *vet = | |
1349 | (struct vlan_ethernet_hdr *)et; | |
1350 | vet->vet_type = htons(prot); | |
1351 | return VLAN_ETHER_HDR_SIZE; | |
1352 | } else if (protlen > 1514) { | |
1353 | et->et_protlen = htons(prot); | |
1354 | return ETHER_HDR_SIZE; | |
1355 | } else { | |
1356 | /* 802.2 + SNAP */ | |
1357 | struct e802_hdr *et802 = (struct e802_hdr *)et; | |
1358 | et802->et_prot = htons(prot); | |
1359 | return E802_HDR_SIZE; | |
1360 | } | |
1361 | } | |
1362 | ||
4b11c916 | 1363 | void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source) |
2d966958 | 1364 | { |
4b11c916 | 1365 | struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; |
2d966958 WD |
1366 | |
1367 | /* | |
4b11c916 | 1368 | * Construct an IP header. |
2d966958 | 1369 | */ |
3e38e429 LC |
1370 | /* IP_HDR_SIZE / 4 (not including UDP) */ |
1371 | ip->ip_hl_v = 0x45; | |
2d966958 | 1372 | ip->ip_tos = 0; |
4b11c916 | 1373 | ip->ip_len = htons(IP_HDR_SIZE); |
2d966958 | 1374 | ip->ip_id = htons(NetIPID++); |
e0c07b86 | 1375 | ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ |
2d966958 | 1376 | ip->ip_ttl = 255; |
2d966958 | 1377 | ip->ip_sum = 0; |
3e38e429 | 1378 | /* already in network byte order */ |
4b11c916 JH |
1379 | NetCopyIP((void *)&ip->ip_src, &source); |
1380 | /* already in network byte order */ | |
6b147d11 | 1381 | NetCopyIP((void *)&ip->ip_dst, &dest); |
4b11c916 JH |
1382 | } |
1383 | ||
1384 | void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport, | |
1385 | int len) | |
1386 | { | |
1387 | struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; | |
1388 | ||
1389 | /* | |
1390 | * If the data is an odd number of bytes, zero the | |
1391 | * byte after the last byte so that the checksum | |
1392 | * will work. | |
1393 | */ | |
1394 | if (len & 1) | |
1395 | pkt[IP_UDP_HDR_SIZE + len] = 0; | |
1396 | ||
1397 | net_set_ip_header(pkt, dest, NetOurIP); | |
1398 | ip->ip_len = htons(IP_UDP_HDR_SIZE + len); | |
1399 | ip->ip_p = IPPROTO_UDP; | |
1400 | ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1); | |
1401 | ||
2d966958 WD |
1402 | ip->udp_src = htons(sport); |
1403 | ip->udp_dst = htons(dport); | |
594c26f8 | 1404 | ip->udp_len = htons(UDP_HDR_SIZE + len); |
2d966958 | 1405 | ip->udp_xsum = 0; |
2d966958 WD |
1406 | } |
1407 | ||
4f63acd0 | 1408 | void copy_filename(char *dst, const char *src, int size) |
2d966958 WD |
1409 | { |
1410 | if (*src && (*src == '"')) { | |
1411 | ++src; | |
1412 | --size; | |
1413 | } | |
1414 | ||
d3c65b01 | 1415 | while ((--size > 0) && *src && (*src != '"')) |
2d966958 | 1416 | *dst++ = *src++; |
2d966958 WD |
1417 | *dst = '\0'; |
1418 | } | |
1419 | ||
3e38e429 LC |
1420 | #if defined(CONFIG_CMD_NFS) || \ |
1421 | defined(CONFIG_CMD_SNTP) || \ | |
1422 | defined(CONFIG_CMD_DNS) | |
1a32bf41 | 1423 | /* |
9739946c RG |
1424 | * make port a little random (1024-17407) |
1425 | * This keeps the math somewhat trivial to compute, and seems to work with | |
1426 | * all supported protocols/clients/servers | |
1a32bf41 RG |
1427 | */ |
1428 | unsigned int random_port(void) | |
1429 | { | |
9739946c | 1430 | return 1024 + (get_timer(0) % 0x4000); |
1a32bf41 RG |
1431 | } |
1432 | #endif | |
1433 | ||
4f63acd0 | 1434 | void ip_to_string(IPaddr_t x, char *s) |
2d966958 | 1435 | { |
4f63acd0 LC |
1436 | x = ntohl(x); |
1437 | sprintf(s, "%d.%d.%d.%d", | |
1438 | (int) ((x >> 24) & 0xff), | |
1439 | (int) ((x >> 16) & 0xff), | |
1440 | (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) | |
6e592385 | 1441 | ); |
2d966958 WD |
1442 | } |
1443 | ||
a3d991bd WD |
1444 | void VLAN_to_string(ushort x, char *s) |
1445 | { | |
1446 | x = ntohs(x); | |
1447 | ||
1448 | if (x == (ushort)-1) | |
1449 | x = VLAN_NONE; | |
1450 | ||
1451 | if (x == VLAN_NONE) | |
1452 | strcpy(s, "none"); | |
1453 | else | |
1454 | sprintf(s, "%d", x & VLAN_IDMASK); | |
1455 | } | |
1456 | ||
2e3ef6e4 | 1457 | ushort string_to_VLAN(const char *s) |
a3d991bd WD |
1458 | { |
1459 | ushort id; | |
1460 | ||
1461 | if (s == NULL) | |
b9711de1 | 1462 | return htons(VLAN_NONE); |
a3d991bd WD |
1463 | |
1464 | if (*s < '0' || *s > '9') | |
1465 | id = VLAN_NONE; | |
1466 | else | |
1467 | id = (ushort)simple_strtoul(s, NULL, 10); | |
1468 | ||
b9711de1 | 1469 | return htons(id); |
a3d991bd WD |
1470 | } |
1471 | ||
a3d991bd WD |
1472 | ushort getenv_VLAN(char *var) |
1473 | { | |
92895de9 | 1474 | return string_to_VLAN(getenv(var)); |
a3d991bd | 1475 | } |