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f739fcd8 1// SPDX-License-Identifier: GPL-2.0
2d966958
WD
2/*
3 * Copied from Linux Monitor (LiMon) - Networking.
4 *
5 * Copyright 1994 - 2000 Neil Russell.
6 * (See License)
7 * Copyright 2000 Roland Borde
8 * Copyright 2000 Paolo Scaffardi
9 * Copyright 2000-2002 Wolfgang Denk, [email protected]
10 */
11
12/*
13 * General Desription:
14 *
15 * The user interface supports commands for BOOTP, RARP, and TFTP.
16 * Also, we support ARP internally. Depending on available data,
17 * these interact as follows:
18 *
19 * BOOTP:
20 *
21 * Prerequisites: - own ethernet address
22 * We want: - own IP address
23 * - TFTP server IP address
24 * - name of bootfile
25 * Next step: ARP
26 *
d22c338e
JH
27 * LINK_LOCAL:
28 *
29 * Prerequisites: - own ethernet address
30 * We want: - own IP address
31 * Next step: ARP
32 *
2d966958
WD
33 * RARP:
34 *
35 * Prerequisites: - own ethernet address
36 * We want: - own IP address
37 * - TFTP server IP address
38 * Next step: ARP
39 *
40 * ARP:
41 *
42 * Prerequisites: - own ethernet address
43 * - own IP address
44 * - TFTP server IP address
45 * We want: - TFTP server ethernet address
46 * Next step: TFTP
47 *
48 * DHCP:
49 *
b2f50807
WD
50 * Prerequisites: - own ethernet address
51 * We want: - IP, Netmask, ServerIP, Gateway IP
52 * - bootfilename, lease time
53 * Next step: - TFTP
2d966958
WD
54 *
55 * TFTP:
56 *
57 * Prerequisites: - own ethernet address
58 * - own IP address
59 * - TFTP server IP address
60 * - TFTP server ethernet address
61 * - name of bootfile (if unknown, we use a default name
62 * derived from our own IP address)
63 * We want: - load the boot file
64 * Next step: none
cbd8a35c
WD
65 *
66 * NFS:
67 *
68 * Prerequisites: - own ethernet address
69 * - own IP address
70 * - name of bootfile (if unknown, we use a default name
71 * derived from our own IP address)
72 * We want: - load the boot file
73 * Next step: none
ea287deb
WD
74 *
75 * SNTP:
76 *
b2f50807 77 * Prerequisites: - own ethernet address
ea287deb
WD
78 * - own IP address
79 * We want: - network time
80 * Next step: none
d8970dae
LF
81 *
82 * WOL:
83 *
84 * Prerequisites: - own ethernet address
85 * We want: - magic packet or timeout
86 * Next step: none
2d966958
WD
87 */
88
89
90#include <common.h>
52f24238 91#include <bootstage.h>
2d966958 92#include <command.h>
24b852a7 93#include <console.h>
c7694dd4 94#include <env.h>
f3998fdc 95#include <env_internal.h>
60304592 96#include <errno.h>
8e8ccfe1 97#include <image.h>
f7ae49fc 98#include <log.h>
2d966958 99#include <net.h>
f73a7df9 100#include <net/fastboot.h>
34696958 101#include <net/tftp.h>
3eaac630
RF
102#if defined(CONFIG_CMD_PCAP)
103#include <net/pcap.h>
104#endif
2d8d190c 105#if defined(CONFIG_LED_STATUS)
fc3e2165 106#include <miiphy.h>
4545f4e6 107#include <status_led.h>
fc3e2165 108#endif
4545f4e6
JH
109#include <watchdog.h>
110#include <linux/compiler.h>
111#include "arp.h"
112#include "bootp.h"
f575ae1f 113#include "cdp.h"
1a32bf41
RG
114#if defined(CONFIG_CMD_DNS)
115#include "dns.h"
116#endif
d22c338e 117#include "link_local.h"
4545f4e6 118#include "nfs.h"
a36b12f9 119#include "ping.h"
4545f4e6
JH
120#include "rarp.h"
121#if defined(CONFIG_CMD_SNTP)
122#include "sntp.h"
123#endif
d8970dae
LF
124#if defined(CONFIG_CMD_WOL)
125#include "wol.h"
126#endif
2d966958 127
2d966958
WD
128/** BOOTP EXTENTIONS **/
129
3e38e429 130/* Our subnet mask (0=unknown) */
049a95a7 131struct in_addr net_netmask;
3e38e429 132/* Our gateways IP address */
049a95a7 133struct in_addr net_gateway;
3e38e429 134/* Our DNS IP address */
049a95a7 135struct in_addr net_dns_server;
1fe80d79 136#if defined(CONFIG_BOOTP_DNS2)
3e38e429 137/* Our 2nd DNS IP address */
049a95a7 138struct in_addr net_dns_server2;
3e38e429 139#endif
2d966958
WD
140
141/** END OF BOOTP EXTENTIONS **/
142
3e38e429 143/* Our ethernet address */
0adb5b76 144u8 net_ethaddr[6];
3e38e429 145/* Boot server enet address */
0adb5b76 146u8 net_server_ethaddr[6];
3e38e429 147/* Our IP addr (0 = unknown) */
049a95a7 148struct in_addr net_ip;
3e38e429 149/* Server IP addr (0 = unknown) */
049a95a7 150struct in_addr net_server_ip;
3e38e429 151/* Current receive packet */
1203fcce 152uchar *net_rx_packet;
3e38e429 153/* Current rx packet length */
1203fcce 154int net_rx_packet_len;
3e38e429 155/* IP packet ID */
bc0571fc 156static unsigned net_ip_id;
3e38e429 157/* Ethernet bcast address */
0adb5b76
JH
158const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
159const u8 net_null_ethaddr[6];
0efe1bcf 160#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
bc0571fc 161void (*push_packet)(void *, int len) = 0;
f85b6071 162#endif
3e38e429 163/* Network loop state */
22f6e99d 164enum net_loop_state net_state;
3e38e429 165/* Tried all network devices */
bc0571fc 166int net_restart_wrap;
3e38e429 167/* Network loop restarted */
bc0571fc 168static int net_restarted;
3e38e429 169/* At least one device configured */
bc0571fc 170static int net_dev_exists;
2d966958 171
6e592385 172/* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
3e38e429 173/* default is without VLAN */
4fd5055f 174ushort net_our_vlan = 0xFFFF;
3e38e429 175/* ditto */
4fd5055f 176ushort net_native_vlan = 0xFFFF;
a3d991bd 177
3e38e429 178/* Boot File name */
11a69ff8 179char net_boot_file_name[1024];
449312c1
AG
180/* Indicates whether the file name was specified on the command line */
181bool net_boot_file_name_explicit;
1411157d
JH
182/* The actual transferred size of the bootfile (in bytes) */
183u32 net_boot_file_size;
184/* Boot file size in blocks as reported by the DHCP server */
185u32 net_boot_file_expected_size_in_blocks;
2d966958 186
643d1ab2 187#if defined(CONFIG_CMD_SNTP)
3e38e429 188/* NTP server IP address */
049a95a7 189struct in_addr net_ntp_server;
3e38e429 190/* offset time from UTC */
bc0571fc 191int net_ntp_time_offset;
ea287deb
WD
192#endif
193
1203fcce 194static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
2a504df0
JH
195/* Receive packets */
196uchar *net_rx_packets[PKTBUFSRX];
ece223b5
JH
197/* Current UDP RX packet handler */
198static rxhand_f *udp_packet_handler;
199/* Current ARP RX packet handler */
200static rxhand_f *arp_packet_handler;
39bccd21 201#ifdef CONFIG_CMD_TFTPPUT
ece223b5
JH
202/* Current ICMP rx handler */
203static rxhand_icmp_f *packet_icmp_handler;
39bccd21 204#endif
3e38e429 205/* Current timeout handler */
bc0571fc 206static thand_f *time_handler;
3e38e429 207/* Time base value */
bc0571fc 208static ulong time_start;
3e38e429 209/* Current timeout value */
bc0571fc 210static ulong time_delta;
3e38e429 211/* THE transmit packet */
1203fcce 212uchar *net_tx_packet;
2d966958 213
e4bf0c5c 214static int net_check_prereq(enum proto_t protocol);
2d966958 215
bc0571fc 216static int net_try_count;
67b96e87 217
b63056d6
JL
218int __maybe_unused net_busy_flag;
219
73a8b27c
WD
220/**********************************************************************/
221
fd305633
JH
222static int on_ipaddr(const char *name, const char *value, enum env_op op,
223 int flags)
224{
225 if (flags & H_PROGRAMMATIC)
226 return 0;
227
228 net_ip = string_to_ip(value);
229
230 return 0;
231}
232U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
233
234static int on_gatewayip(const char *name, const char *value, enum env_op op,
235 int flags)
236{
237 if (flags & H_PROGRAMMATIC)
238 return 0;
239
240 net_gateway = string_to_ip(value);
241
242 return 0;
243}
244U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
245
246static int on_netmask(const char *name, const char *value, enum env_op op,
247 int flags)
248{
249 if (flags & H_PROGRAMMATIC)
250 return 0;
251
252 net_netmask = string_to_ip(value);
253
254 return 0;
255}
256U_BOOT_ENV_CALLBACK(netmask, on_netmask);
257
258static int on_serverip(const char *name, const char *value, enum env_op op,
259 int flags)
260{
261 if (flags & H_PROGRAMMATIC)
262 return 0;
263
264 net_server_ip = string_to_ip(value);
265
266 return 0;
267}
268U_BOOT_ENV_CALLBACK(serverip, on_serverip);
269
270static int on_nvlan(const char *name, const char *value, enum env_op op,
271 int flags)
272{
273 if (flags & H_PROGRAMMATIC)
274 return 0;
275
276 net_native_vlan = string_to_vlan(value);
277
278 return 0;
279}
280U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
281
282static int on_vlan(const char *name, const char *value, enum env_op op,
283 int flags)
284{
285 if (flags & H_PROGRAMMATIC)
286 return 0;
287
288 net_our_vlan = string_to_vlan(value);
289
290 return 0;
291}
292U_BOOT_ENV_CALLBACK(vlan, on_vlan);
293
294#if defined(CONFIG_CMD_DNS)
295static int on_dnsip(const char *name, const char *value, enum env_op op,
296 int flags)
297{
298 if (flags & H_PROGRAMMATIC)
299 return 0;
300
301 net_dns_server = string_to_ip(value);
302
303 return 0;
304}
305U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
306#endif
307
e4a3d57d
SG
308/*
309 * Check if autoload is enabled. If so, use either NFS or TFTP to download
310 * the boot file.
311 */
312void net_auto_load(void)
313{
a6ab4b54 314#if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
00caae6d 315 const char *s = env_get("autoload");
e4a3d57d 316
ec8a252c 317 if (s != NULL && strcmp(s, "NFS") == 0) {
3855cad6
JH
318 if (net_check_prereq(NFS)) {
319/* We aren't expecting to get a serverip, so just accept the assigned IP */
320#ifdef CONFIG_BOOTP_SERVERIP
321 net_set_state(NETLOOP_SUCCESS);
322#else
323 printf("Cannot autoload with NFS\n");
324 net_set_state(NETLOOP_FAIL);
325#endif
326 return;
327 }
ec8a252c
JH
328 /*
329 * Use NFS to load the bootfile.
330 */
68c76a3a 331 nfs_start();
ec8a252c
JH
332 return;
333 }
e4a3d57d 334#endif
bfebc8c9 335 if (env_get_yesno("autoload") == 0) {
ec8a252c
JH
336 /*
337 * Just use BOOTP/RARP to configure system;
338 * Do not use TFTP to load the bootfile.
339 */
340 net_set_state(NETLOOP_SUCCESS);
341 return;
e4a3d57d 342 }
3855cad6
JH
343 if (net_check_prereq(TFTPGET)) {
344/* We aren't expecting to get a serverip, so just accept the assigned IP */
345#ifdef CONFIG_BOOTP_SERVERIP
346 net_set_state(NETLOOP_SUCCESS);
347#else
348 printf("Cannot autoload with TFTPGET\n");
349 net_set_state(NETLOOP_FAIL);
350#endif
351 return;
352 }
8885c5fe 353 tftp_start(TFTPGET);
e4a3d57d
SG
354}
355
bc0571fc 356static void net_init_loop(void)
2f70c49e 357{
7315cfd9 358 if (eth_get_dev())
0adb5b76 359 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
3c172c4f 360
da95427c 361 return;
2f70c49e
HS
362}
363
ece223b5
JH
364static void net_clear_handlers(void)
365{
366 net_set_udp_handler(NULL);
367 net_set_arp_handler(NULL);
bc0571fc 368 net_set_timeout_handler(0, NULL);
ece223b5
JH
369}
370
371static void net_cleanup_loop(void)
372{
373 net_clear_handlers();
374}
375
46c495d5
JH
376void net_init(void)
377{
378 static int first_call = 1;
379
380 if (first_call) {
381 /*
382 * Setup packet buffers, aligned correctly.
383 */
384 int i;
385
1203fcce
JH
386 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
387 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
2a504df0 388 for (i = 0; i < PKTBUFSRX; i++) {
1203fcce
JH
389 net_rx_packets[i] = net_tx_packet +
390 (i + 1) * PKTSIZE_ALIGN;
2a504df0 391 }
85d25e0e 392 arp_init();
46c495d5
JH
393 net_clear_handlers();
394
395 /* Only need to setup buffer pointers once. */
396 first_call = 0;
397 }
398
bc0571fc 399 net_init_loop();
46c495d5
JH
400}
401
2d966958
WD
402/**********************************************************************/
403/*
404 * Main network processing loop.
405 */
406
bc0571fc 407int net_loop(enum proto_t protocol)
2d966958 408{
60304592 409 int ret = -EINVAL;
60177b26 410 enum net_loop_state prev_net_state = net_state;
2d966958 411
def7a5c0
MS
412#if defined(CONFIG_CMD_PING)
413 if (protocol != PING)
414 net_ping_ip.s_addr = 0;
415#endif
bc0571fc
JH
416 net_restarted = 0;
417 net_dev_exists = 0;
418 net_try_count = 1;
419 debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
73a8b27c 420
573f14fe 421 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
46c495d5 422 net_init();
f8be7d65 423 if (eth_is_on_demand_init() || protocol != NETCONS) {
b1bf6f2c 424 eth_halt();
f8be7d65 425 eth_set_current();
60304592
JH
426 ret = eth_init();
427 if (ret < 0) {
f8be7d65 428 eth_halt();
60304592 429 return ret;
f8be7d65 430 }
bc0571fc 431 } else {
d2eaec60 432 eth_init_state_only();
bc0571fc 433 }
2d966958 434restart:
b63056d6
JL
435#ifdef CONFIG_USB_KEYBOARD
436 net_busy_flag = 0;
437#endif
22f6e99d 438 net_set_state(NETLOOP_CONTINUE);
2d966958
WD
439
440 /*
441 * Start the ball rolling with the given start function. From
442 * here on, this code is a state machine driven by received
443 * packets and timer events.
444 */
bc0571fc
JH
445 debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
446 net_init_loop();
2d966958 447
4f63acd0 448 switch (net_check_prereq(protocol)) {
2d966958
WD
449 case 1:
450 /* network not configured */
b1bf6f2c 451 eth_halt();
60177b26 452 net_set_state(prev_net_state);
60304592 453 return -ENODEV;
2d966958 454
2d966958
WD
455 case 2:
456 /* network device not configured */
457 break;
2d966958
WD
458
459 case 0:
bc0571fc 460 net_dev_exists = 1;
1411157d 461 net_boot_file_size = 0;
2d966958 462 switch (protocol) {
808f13d8 463#ifdef CONFIG_CMD_TFTPBOOT
e4bf0c5c 464 case TFTPGET:
1fb7cd49
SG
465#ifdef CONFIG_CMD_TFTPPUT
466 case TFTPPUT:
467#endif
2d966958 468 /* always use ARP to get server ethernet address */
8885c5fe 469 tftp_start(protocol);
2d966958 470 break;
808f13d8 471#endif
7a83af07
LC
472#ifdef CONFIG_CMD_TFTPSRV
473 case TFTPSRV:
8885c5fe 474 tftp_start_server();
7a83af07
LC
475 break;
476#endif
f73a7df9
AK
477#ifdef CONFIG_UDP_FUNCTION_FASTBOOT
478 case FASTBOOT:
479 fastboot_start_server();
480 break;
481#endif
643d1ab2 482#if defined(CONFIG_CMD_DHCP)
2d966958 483 case DHCP:
7044c6bb 484 bootp_reset();
049a95a7 485 net_ip.s_addr = 0;
7044c6bb 486 dhcp_request(); /* Basically same as BOOTP */
2d966958 487 break;
610f2e9c 488#endif
808f13d8 489#if defined(CONFIG_CMD_BOOTP)
2d966958 490 case BOOTP:
7044c6bb 491 bootp_reset();
049a95a7 492 net_ip.s_addr = 0;
7044c6bb 493 bootp_request();
2d966958 494 break;
808f13d8 495#endif
bf6cb247 496#if defined(CONFIG_CMD_RARP)
2d966958 497 case RARP:
698d78e5 498 rarp_try = 0;
049a95a7 499 net_ip.s_addr = 0;
698d78e5 500 rarp_request();
2d966958 501 break;
bf6cb247 502#endif
643d1ab2 503#if defined(CONFIG_CMD_PING)
73a8b27c 504 case PING:
a36b12f9 505 ping_start();
73a8b27c 506 break;
cbd8a35c 507#endif
a6ab4b54 508#if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
cbd8a35c 509 case NFS:
68c76a3a 510 nfs_start();
cbd8a35c 511 break;
a3d991bd 512#endif
643d1ab2 513#if defined(CONFIG_CMD_CDP)
a3d991bd 514 case CDP:
6aede5b7 515 cdp_start();
a3d991bd 516 break;
68ceb29e 517#endif
66c89ee3 518#if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
68ceb29e 519 case NETCONS:
6a38a5f3 520 nc_start();
68ceb29e 521 break;
ea287deb 522#endif
643d1ab2 523#if defined(CONFIG_CMD_SNTP)
ea287deb 524 case SNTP:
38ba2558 525 sntp_start();
ea287deb 526 break;
1a32bf41
RG
527#endif
528#if defined(CONFIG_CMD_DNS)
529 case DNS:
786eac5f 530 dns_start();
1a32bf41 531 break;
d22c338e
JH
532#endif
533#if defined(CONFIG_CMD_LINK_LOCAL)
534 case LINKLOCAL:
535 link_local_start();
536 break;
d8970dae
LF
537#endif
538#if defined(CONFIG_CMD_WOL)
539 case WOL:
540 wol_start();
541 break;
73a8b27c 542#endif
2d966958
WD
543 default:
544 break;
545 }
546
2d966958
WD
547 break;
548 }
549
643d1ab2 550#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
3e38e429 551#if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
2d8d190c
UM
552 defined(CONFIG_LED_STATUS) && \
553 defined(CONFIG_LED_STATUS_RED)
fc3e2165 554 /*
42d1f039 555 * Echo the inverted link state to the fault LED.
fc3e2165 556 */
d3c65b01 557 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
2d8d190c 558 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
d3c65b01 559 else
2d8d190c 560 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
6d0f6bcf 561#endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
fc3e2165 562#endif /* CONFIG_MII, ... */
b63056d6
JL
563#ifdef CONFIG_USB_KEYBOARD
564 net_busy_flag = 1;
565#endif
2d966958
WD
566
567 /*
568 * Main packet reception loop. Loop receiving packets until
22f6e99d 569 * someone sets `net_state' to a state that terminates.
2d966958
WD
570 */
571 for (;;) {
572 WATCHDOG_RESET();
c5a75339
JH
573 if (arp_timeout_check() > 0)
574 time_start = get_timer(0);
575
2d966958
WD
576 /*
577 * Check the ethernet for a new packet. The ethernet
578 * receive routine will process it.
60304592
JH
579 * Most drivers return the most recent packet size, but not
580 * errors that may have happened.
2d966958 581 */
40cb90ee 582 eth_rx();
2d966958
WD
583
584 /*
585 * Abort if ctrl-c was pressed.
586 */
587 if (ctrlc()) {
e94070c4 588 /* cancel any ARP that may not have completed */
049a95a7 589 net_arp_wait_packet_ip.s_addr = 0;
e94070c4 590
ece223b5 591 net_cleanup_loop();
8bde7f77 592 eth_halt();
f8be7d65
JH
593 /* Invalidate the last protocol */
594 eth_set_last_protocol(BOOTP);
595
4f63acd0 596 puts("\nAbort\n");
4ef8d53c
JH
597 /* include a debug print as well incase the debug
598 messages are directed to stderr */
bc0571fc 599 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
19a4fbaa 600 ret = -EINTR;
4793ee65 601 goto done;
2d966958
WD
602 }
603
2d966958
WD
604 /*
605 * Check for a timeout, and run the timeout handler
606 * if we have one.
607 */
bc0571fc
JH
608 if (time_handler &&
609 ((get_timer(0) - time_start) > time_delta)) {
2d966958
WD
610 thand_f *x;
611
643d1ab2 612#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
4f63acd0 613#if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
2d8d190c
UM
614 defined(CONFIG_LED_STATUS) && \
615 defined(CONFIG_LED_STATUS_RED)
fc3e2165 616 /*
42d1f039 617 * Echo the inverted link state to the fault LED.
fc3e2165 618 */
4f63acd0 619 if (miiphy_link(eth_get_dev()->name,
bc0571fc 620 CONFIG_SYS_FAULT_MII_ADDR))
2d8d190c
UM
621 status_led_set(CONFIG_LED_STATUS_RED,
622 CONFIG_LED_STATUS_OFF);
bc0571fc 623 else
2d8d190c
UM
624 status_led_set(CONFIG_LED_STATUS_RED,
625 CONFIG_LED_STATUS_ON);
4f63acd0 626#endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
fc3e2165 627#endif /* CONFIG_MII, ... */
bc0571fc
JH
628 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
629 x = time_handler;
630 time_handler = (thand_f *)0;
2d966958
WD
631 (*x)();
632 }
633
5c421331 634 if (net_state == NETLOOP_FAIL)
bc0571fc 635 ret = net_start_again();
2d966958 636
22f6e99d 637 switch (net_state) {
2d966958 638 case NETLOOP_RESTART:
bc0571fc 639 net_restarted = 1;
2d966958
WD
640 goto restart;
641
642 case NETLOOP_SUCCESS:
ece223b5 643 net_cleanup_loop();
1411157d
JH
644 if (net_boot_file_size > 0) {
645 printf("Bytes transferred = %d (%x hex)\n",
646 net_boot_file_size, net_boot_file_size);
018f5303 647 env_set_hex("filesize", net_boot_file_size);
bb872dd9 648 env_set_hex("fileaddr", image_load_addr);
2d966958 649 }
f8be7d65
JH
650 if (protocol != NETCONS)
651 eth_halt();
652 else
653 eth_halt_state_only();
654
655 eth_set_last_protocol(protocol);
656
1411157d 657 ret = net_boot_file_size;
bc0571fc 658 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
4793ee65 659 goto done;
2d966958
WD
660
661 case NETLOOP_FAIL:
ece223b5 662 net_cleanup_loop();
f8be7d65
JH
663 /* Invalidate the last protocol */
664 eth_set_last_protocol(BOOTP);
bc0571fc 665 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
a735e6e9 666 ret = -ENONET;
4793ee65 667 goto done;
22f6e99d
JH
668
669 case NETLOOP_CONTINUE:
670 continue;
2d966958
WD
671 }
672 }
4793ee65
SG
673
674done:
b63056d6
JL
675#ifdef CONFIG_USB_KEYBOARD
676 net_busy_flag = 0;
677#endif
39bccd21 678#ifdef CONFIG_CMD_TFTPPUT
4793ee65 679 /* Clear out the handlers */
ece223b5 680 net_set_udp_handler(NULL);
4793ee65 681 net_set_icmp_handler(NULL);
39bccd21 682#endif
60177b26 683 net_set_state(prev_net_state);
3eaac630
RF
684
685#if defined(CONFIG_CMD_PCAP)
686 if (pcap_active())
687 pcap_print_status();
688#endif
4793ee65 689 return ret;
2d966958
WD
690}
691
692/**********************************************************************/
693
bc0571fc 694static void start_again_timeout_handler(void)
2d966958 695{
22f6e99d 696 net_set_state(NETLOOP_RESTART);
2d966958
WD
697}
698
bc0571fc 699int net_start_again(void)
2d966958 700{
6e592385 701 char *nretry;
67b96e87
RB
702 int retry_forever = 0;
703 unsigned long retrycnt = 0;
60304592 704 int ret;
67b96e87 705
00caae6d 706 nretry = env_get("netretry");
67b96e87
RB
707 if (nretry) {
708 if (!strcmp(nretry, "yes"))
709 retry_forever = 1;
710 else if (!strcmp(nretry, "no"))
711 retrycnt = 0;
712 else if (!strcmp(nretry, "once"))
713 retrycnt = 1;
714 else
715 retrycnt = simple_strtoul(nretry, NULL, 0);
5c421331
JH
716 } else {
717 retrycnt = 0;
718 retry_forever = 0;
719 }
67b96e87 720
17d413b2 721 if ((!retry_forever) && (net_try_count > retrycnt)) {
67b96e87 722 eth_halt();
22f6e99d 723 net_set_state(NETLOOP_FAIL);
60304592
JH
724 /*
725 * We don't provide a way for the protocol to return an error,
726 * but this is almost always the reason.
727 */
728 return -ETIMEDOUT;
a3d991bd 729 }
67b96e87 730
bc0571fc 731 net_try_count++;
67b96e87 732
4f63acd0 733 eth_halt();
8b0c5c12 734#if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
bc0571fc 735 eth_try_another(!net_restarted);
8b0c5c12 736#endif
60304592 737 ret = eth_init();
bc0571fc
JH
738 if (net_restart_wrap) {
739 net_restart_wrap = 0;
740 if (net_dev_exists) {
741 net_set_timeout_handler(10000UL,
742 start_again_timeout_handler);
ece223b5 743 net_set_udp_handler(NULL);
6e592385 744 } else {
22f6e99d 745 net_set_state(NETLOOP_FAIL);
2d966958 746 }
6e592385 747 } else {
22f6e99d 748 net_set_state(NETLOOP_RESTART);
2d966958 749 }
60304592 750 return ret;
2d966958
WD
751}
752
753/**********************************************************************/
754/*
755 * Miscelaneous bits.
756 */
757
ece223b5 758static void dummy_handler(uchar *pkt, unsigned dport,
049a95a7 759 struct in_addr sip, unsigned sport,
ece223b5 760 unsigned len)
d280d3f4 761{
d280d3f4
JH
762}
763
ece223b5
JH
764rxhand_f *net_get_udp_handler(void)
765{
766 return udp_packet_handler;
767}
d280d3f4 768
ece223b5
JH
769void net_set_udp_handler(rxhand_f *f)
770{
bc0571fc 771 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
ece223b5
JH
772 if (f == NULL)
773 udp_packet_handler = dummy_handler;
774 else
775 udp_packet_handler = f;
776}
777
778rxhand_f *net_get_arp_handler(void)
2d966958 779{
ece223b5
JH
780 return arp_packet_handler;
781}
782
783void net_set_arp_handler(rxhand_f *f)
784{
bc0571fc 785 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
ece223b5
JH
786 if (f == NULL)
787 arp_packet_handler = dummy_handler;
788 else
789 arp_packet_handler = f;
2d966958
WD
790}
791
39bccd21 792#ifdef CONFIG_CMD_TFTPPUT
4793ee65
SG
793void net_set_icmp_handler(rxhand_icmp_f *f)
794{
795 packet_icmp_handler = f;
796}
39bccd21 797#endif
2d966958 798
bc0571fc 799void net_set_timeout_handler(ulong iv, thand_f *f)
2d966958
WD
800{
801 if (iv == 0) {
4ef8d53c 802 debug_cond(DEBUG_INT_STATE,
bc0571fc
JH
803 "--- net_loop timeout handler cancelled\n");
804 time_handler = (thand_f *)0;
2d966958 805 } else {
4ef8d53c 806 debug_cond(DEBUG_INT_STATE,
bc0571fc
JH
807 "--- net_loop timeout handler set (%p)\n", f);
808 time_handler = f;
809 time_start = get_timer(0);
810 time_delta = iv * CONFIG_SYS_HZ / 1000;
2d966958
WD
811 }
812}
813
ac3f26cc
JH
814uchar *net_get_async_tx_pkt_buf(void)
815{
816 if (arp_is_waiting())
817 return arp_tx_packet; /* If we are waiting, we already sent */
818 else
819 return net_tx_packet;
820}
821
1203fcce 822int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
206d07fd 823 int payload_len)
5d457ecb
DH
824{
825 return net_send_ip_packet(ether, dest, dport, sport, payload_len,
826 IPPROTO_UDP, 0, 0, 0);
827}
828
829int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
830 int payload_len, int proto, u8 action, u32 tcp_seq_num,
831 u32 tcp_ack_num)
73a8b27c 832{
a3d991bd 833 uchar *pkt;
9214637a
JH
834 int eth_hdr_size;
835 int pkt_hdr_size;
a3d991bd 836
bc0571fc 837 /* make sure the net_tx_packet is initialized (net_init() was called) */
1203fcce
JH
838 assert(net_tx_packet != NULL);
839 if (net_tx_packet == NULL)
46c495d5
JH
840 return -1;
841
73a8b27c 842 /* convert to new style broadcast */
049a95a7
JH
843 if (dest.s_addr == 0)
844 dest.s_addr = 0xFFFFFFFF;
73a8b27c
WD
845
846 /* if broadcast, make the ether address a broadcast and don't do ARP */
049a95a7 847 if (dest.s_addr == 0xFFFFFFFF)
0adb5b76 848 ether = (uchar *)net_bcast_ethaddr;
73a8b27c 849
1203fcce 850 pkt = (uchar *)net_tx_packet;
9214637a 851
1203fcce 852 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
5d457ecb
DH
853
854 switch (proto) {
855 case IPPROTO_UDP:
856 net_set_udp_header(pkt + eth_hdr_size, dest, dport, sport,
857 payload_len);
858 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
859 break;
860 default:
861 return -EINVAL;
862 }
73a8b27c 863
e94070c4 864 /* if MAC address was not discovered yet, do an ARP request */
0adb5b76 865 if (memcmp(ether, net_null_ethaddr, 6) == 0) {
4ef8d53c 866 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
0ebf04c6 867
9214637a 868 /* save the ip and eth addr for the packet to send after arp */
049a95a7 869 net_arp_wait_packet_ip = dest;
85d25e0e 870 arp_wait_packet_ethaddr = ether;
a3d991bd 871
73a8b27c 872 /* size of the waiting packet */
85d25e0e 873 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
73a8b27c
WD
874
875 /* and do the ARP request */
85d25e0e
JH
876 arp_wait_try = 1;
877 arp_wait_timer_start = get_timer(0);
878 arp_request();
73a8b27c 879 return 1; /* waiting */
9214637a 880 } else {
4ef8d53c 881 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
bc0571fc 882 &dest, ether);
1203fcce 883 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
9214637a 884 return 0; /* transmitted */
73a8b27c 885 }
73a8b27c
WD
886}
887
5cfaa4e5
AR
888#ifdef CONFIG_IP_DEFRAG
889/*
890 * This function collects fragments in a single packet, according
891 * to the algorithm in RFC815. It returns NULL or the pointer to
892 * a complete packet, in static storage
893 */
aa7a6487 894#define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
5cfaa4e5 895
c5c59df0 896#define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
5cfaa4e5
AR
897
898/*
899 * this is the packet being assembled, either data or frag control.
900 * Fragments go by 8 bytes, so this union must be 8 bytes long
901 */
902struct hole {
903 /* first_byte is address of this structure */
904 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
905 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
906 u16 prev_hole; /* index of prev, 0 == none */
907 u16 unused;
908};
909
bc0571fc 910static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
5cfaa4e5 911{
48522bb5 912 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
5cfaa4e5
AR
913 static u16 first_hole, total_len;
914 struct hole *payload, *thisfrag, *h, *newh;
594c26f8 915 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
5cfaa4e5
AR
916 uchar *indata = (uchar *)ip;
917 int offset8, start, len, done = 0;
918 u16 ip_off = ntohs(ip->ip_off);
919
920 /* payload starts after IP header, this fragment is in there */
c5c59df0 921 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
5cfaa4e5
AR
922 offset8 = (ip_off & IP_OFFS);
923 thisfrag = payload + offset8;
924 start = offset8 * 8;
c5c59df0 925 len = ntohs(ip->ip_len) - IP_HDR_SIZE;
5cfaa4e5
AR
926
927 if (start + len > IP_MAXUDP) /* fragment extends too far */
928 return NULL;
929
930 if (!total_len || localip->ip_id != ip->ip_id) {
931 /* new (or different) packet, reset structs */
932 total_len = 0xffff;
933 payload[0].last_byte = ~0;
934 payload[0].next_hole = 0;
935 payload[0].prev_hole = 0;
936 first_hole = 0;
937 /* any IP header will work, copy the first we received */
c5c59df0 938 memcpy(localip, ip, IP_HDR_SIZE);
5cfaa4e5
AR
939 }
940
941 /*
942 * What follows is the reassembly algorithm. We use the payload
943 * array as a linked list of hole descriptors, as each hole starts
944 * at a multiple of 8 bytes. However, last byte can be whatever value,
945 * so it is represented as byte count, not as 8-byte blocks.
946 */
947
948 h = payload + first_hole;
949 while (h->last_byte < start) {
950 if (!h->next_hole) {
951 /* no hole that far away */
952 return NULL;
953 }
954 h = payload + h->next_hole;
955 }
956
e397e59e
FS
957 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
958 if (offset8 + ((len + 7) / 8) <= h - payload) {
5cfaa4e5
AR
959 /* no overlap with holes (dup fragment?) */
960 return NULL;
961 }
962
963 if (!(ip_off & IP_FLAGS_MFRAG)) {
964 /* no more fragmentss: truncate this (last) hole */
965 total_len = start + len;
966 h->last_byte = start + len;
967 }
968
969 /*
970 * There is some overlap: fix the hole list. This code doesn't
971 * deal with a fragment that overlaps with two different holes
972 * (thus being a superset of a previously-received fragment).
973 */
974
4f63acd0 975 if ((h >= thisfrag) && (h->last_byte <= start + len)) {
5cfaa4e5
AR
976 /* complete overlap with hole: remove hole */
977 if (!h->prev_hole && !h->next_hole) {
978 /* last remaining hole */
979 done = 1;
980 } else if (!h->prev_hole) {
981 /* first hole */
982 first_hole = h->next_hole;
983 payload[h->next_hole].prev_hole = 0;
984 } else if (!h->next_hole) {
985 /* last hole */
986 payload[h->prev_hole].next_hole = 0;
987 } else {
988 /* in the middle of the list */
989 payload[h->next_hole].prev_hole = h->prev_hole;
990 payload[h->prev_hole].next_hole = h->next_hole;
991 }
992
993 } else if (h->last_byte <= start + len) {
994 /* overlaps with final part of the hole: shorten this hole */
995 h->last_byte = start;
996
997 } else if (h >= thisfrag) {
998 /* overlaps with initial part of the hole: move this hole */
999 newh = thisfrag + (len / 8);
1000 *newh = *h;
1001 h = newh;
1002 if (h->next_hole)
1003 payload[h->next_hole].prev_hole = (h - payload);
1004 if (h->prev_hole)
1005 payload[h->prev_hole].next_hole = (h - payload);
1006 else
1007 first_hole = (h - payload);
1008
1009 } else {
1010 /* fragment sits in the middle: split the hole */
1011 newh = thisfrag + (len / 8);
1012 *newh = *h;
1013 h->last_byte = start;
1014 h->next_hole = (newh - payload);
1015 newh->prev_hole = (h - payload);
1016 if (newh->next_hole)
1017 payload[newh->next_hole].prev_hole = (newh - payload);
1018 }
1019
1020 /* finally copy this fragment and possibly return whole packet */
c5c59df0 1021 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
5cfaa4e5
AR
1022 if (!done)
1023 return NULL;
1024
1025 localip->ip_len = htons(total_len);
c5c59df0 1026 *lenp = total_len + IP_HDR_SIZE;
5cfaa4e5
AR
1027 return localip;
1028}
1029
bc0571fc
JH
1030static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1031 int *lenp)
5cfaa4e5
AR
1032{
1033 u16 ip_off = ntohs(ip->ip_off);
1034 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1035 return ip; /* not a fragment */
bc0571fc 1036 return __net_defragment(ip, lenp);
5cfaa4e5
AR
1037}
1038
1039#else /* !CONFIG_IP_DEFRAG */
1040
bc0571fc
JH
1041static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1042 int *lenp)
5cfaa4e5
AR
1043{
1044 u16 ip_off = ntohs(ip->ip_off);
1045 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1046 return ip; /* not a fragment */
1047 return NULL;
1048}
1049#endif
a3d991bd 1050
8f79bb17
SG
1051/**
1052 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1053 * drop others.
1054 *
1055 * @parma ip IP packet containing the ICMP
1056 */
594c26f8 1057static void receive_icmp(struct ip_udp_hdr *ip, int len,
049a95a7 1058 struct in_addr src_ip, struct ethernet_hdr *et)
8f79bb17 1059{
e0a63079 1060 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
8f79bb17
SG
1061
1062 switch (icmph->type) {
1063 case ICMP_REDIRECT:
1064 if (icmph->code != ICMP_REDIR_HOST)
1065 return;
1066 printf(" ICMP Host Redirect to %pI4 ",
bc0571fc 1067 &icmph->un.gateway);
8f79bb17 1068 break;
a36b12f9 1069 default:
8f79bb17 1070#if defined(CONFIG_CMD_PING)
a36b12f9 1071 ping_receive(et, ip, len);
8f79bb17 1072#endif
39bccd21 1073#ifdef CONFIG_CMD_TFTPPUT
4793ee65
SG
1074 if (packet_icmp_handler)
1075 packet_icmp_handler(icmph->type, icmph->code,
bc0571fc
JH
1076 ntohs(ip->udp_dst), src_ip,
1077 ntohs(ip->udp_src), icmph->un.data,
1078 ntohs(ip->udp_len));
39bccd21 1079#endif
8f79bb17
SG
1080 break;
1081 }
1082}
1083
2a504df0 1084void net_process_received_packet(uchar *in_packet, int len)
2d966958 1085{
cb487f56 1086 struct ethernet_hdr *et;
594c26f8 1087 struct ip_udp_hdr *ip;
049a95a7
JH
1088 struct in_addr dst_ip;
1089 struct in_addr src_ip;
8d353eb8 1090 int eth_proto;
643d1ab2 1091#if defined(CONFIG_CMD_CDP)
a3d991bd
WD
1092 int iscdp;
1093#endif
1094 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1095
4ef8d53c 1096 debug_cond(DEBUG_NET_PKT, "packet received\n");
2d966958 1097
3eaac630
RF
1098#if defined(CONFIG_CMD_PCAP)
1099 pcap_post(in_packet, len, false);
1100#endif
1203fcce
JH
1101 net_rx_packet = in_packet;
1102 net_rx_packet_len = len;
2a504df0 1103 et = (struct ethernet_hdr *)in_packet;
a3d991bd
WD
1104
1105 /* too small packet? */
1106 if (len < ETHER_HDR_SIZE)
1107 return;
1108
0efe1bcf 1109#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
f85b6071 1110 if (push_packet) {
2a504df0 1111 (*push_packet)(in_packet, len);
f85b6071
RJ
1112 return;
1113 }
1114#endif
1115
643d1ab2 1116#if defined(CONFIG_CMD_CDP)
a3d991bd 1117 /* keep track if packet is CDP */
17351883 1118 iscdp = is_cdp_packet(et->et_dest);
a3d991bd
WD
1119#endif
1120
4fd5055f 1121 myvlanid = ntohs(net_our_vlan);
a3d991bd
WD
1122 if (myvlanid == (ushort)-1)
1123 myvlanid = VLAN_NONE;
4fd5055f 1124 mynvlanid = ntohs(net_native_vlan);
a3d991bd
WD
1125 if (mynvlanid == (ushort)-1)
1126 mynvlanid = VLAN_NONE;
2d966958 1127
8d353eb8 1128 eth_proto = ntohs(et->et_protlen);
2d966958 1129
8d353eb8 1130 if (eth_proto < 1514) {
cb487f56 1131 struct e802_hdr *et802 = (struct e802_hdr *)et;
2d966958 1132 /*
da5ebe2c
JH
1133 * Got a 802.2 packet. Check the other protocol field.
1134 * XXX VLAN over 802.2+SNAP not implemented!
2d966958 1135 */
8d353eb8 1136 eth_proto = ntohs(et802->et_prot);
a3d991bd 1137
2a504df0 1138 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
2d966958 1139 len -= E802_HDR_SIZE;
a3d991bd 1140
8d353eb8 1141 } else if (eth_proto != PROT_VLAN) { /* normal packet */
2a504df0 1142 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
2d966958 1143 len -= ETHER_HDR_SIZE;
a3d991bd
WD
1144
1145 } else { /* VLAN packet */
c68cca35
JH
1146 struct vlan_ethernet_hdr *vet =
1147 (struct vlan_ethernet_hdr *)et;
a3d991bd 1148
4ef8d53c 1149 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
0ebf04c6 1150
a3d991bd
WD
1151 /* too small packet? */
1152 if (len < VLAN_ETHER_HDR_SIZE)
1153 return;
1154
1155 /* if no VLAN active */
4fd5055f 1156 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
643d1ab2 1157#if defined(CONFIG_CMD_CDP)
a3d991bd
WD
1158 && iscdp == 0
1159#endif
1160 )
1161 return;
1162
1163 cti = ntohs(vet->vet_tag);
1164 vlanid = cti & VLAN_IDMASK;
8d353eb8 1165 eth_proto = ntohs(vet->vet_type);
a3d991bd 1166
2a504df0 1167 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
a3d991bd 1168 len -= VLAN_ETHER_HDR_SIZE;
2d966958
WD
1169 }
1170
4ef8d53c 1171 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
2d966958 1172
643d1ab2 1173#if defined(CONFIG_CMD_CDP)
a3d991bd 1174 if (iscdp) {
0b4c5ff4 1175 cdp_receive((uchar *)ip, len);
a3d991bd
WD
1176 return;
1177 }
1178#endif
1179
1180 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1181 if (vlanid == VLAN_NONE)
1182 vlanid = (mynvlanid & VLAN_IDMASK);
1183 /* not matched? */
1184 if (vlanid != (myvlanid & VLAN_IDMASK))
1185 return;
1186 }
1187
8d353eb8 1188 switch (eth_proto) {
2d966958 1189 case PROT_ARP:
85d25e0e 1190 arp_receive(et, ip, len);
289f932c 1191 break;
2d966958 1192
bf6cb247 1193#ifdef CONFIG_CMD_RARP
2d966958 1194 case PROT_RARP:
8b9c5322 1195 rarp_receive(ip, len);
2d966958 1196 break;
bf6cb247 1197#endif
2d966958 1198 case PROT_IP:
4ef8d53c 1199 debug_cond(DEBUG_NET_PKT, "Got IP\n");
5cfaa4e5 1200 /* Before we start poking the header, make sure it is there */
594c26f8
JH
1201 if (len < IP_UDP_HDR_SIZE) {
1202 debug("len bad %d < %lu\n", len,
bc0571fc 1203 (ulong)IP_UDP_HDR_SIZE);
2d966958
WD
1204 return;
1205 }
5cfaa4e5 1206 /* Check the packet length */
2d966958 1207 if (len < ntohs(ip->ip_len)) {
4ef8d53c 1208 debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
2d966958
WD
1209 return;
1210 }
1211 len = ntohs(ip->ip_len);
4ef8d53c 1212 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
bc0571fc 1213 len, ip->ip_hl_v & 0xff);
0ebf04c6 1214
5cfaa4e5 1215 /* Can't deal with anything except IPv4 */
d3c65b01 1216 if ((ip->ip_hl_v & 0xf0) != 0x40)
2d966958 1217 return;
5cfaa4e5 1218 /* Can't deal with IP options (headers != 20 bytes) */
d3c65b01 1219 if ((ip->ip_hl_v & 0x0f) > 0x05)
6b52cfe1 1220 return;
5cfaa4e5 1221 /* Check the Checksum of the header */
0da0fcd5 1222 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
4ef8d53c 1223 debug("checksum bad\n");
2d966958
WD
1224 return;
1225 }
5cfaa4e5 1226 /* If it is not for us, ignore it */
049a95a7
JH
1227 dst_ip = net_read_ip(&ip->ip_dst);
1228 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1229 dst_ip.s_addr != 0xFFFFFFFF) {
c819abee 1230 return;
2d966958 1231 }
03eb129f 1232 /* Read source IP address for later use */
049a95a7 1233 src_ip = net_read_ip(&ip->ip_src);
5cfaa4e5
AR
1234 /*
1235 * The function returns the unchanged packet if it's not
1236 * a fragment, and either the complete packet or NULL if
1237 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1238 */
bc0571fc 1239 ip = net_defragment(ip, &len);
ccb9ebef 1240 if (!ip)
5cfaa4e5 1241 return;
2d966958
WD
1242 /*
1243 * watch for ICMP host redirects
1244 *
8bde7f77
WD
1245 * There is no real handler code (yet). We just watch
1246 * for ICMP host redirect messages. In case anybody
1247 * sees these messages: please contact me
1248 * ([email protected]), or - even better - send me the
1249 * necessary fixes :-)
2d966958 1250 *
8bde7f77
WD
1251 * Note: in all cases where I have seen this so far
1252 * it was a problem with the router configuration,
1253 * for instance when a router was configured in the
1254 * BOOTP reply, but the TFTP server was on the same
1255 * subnet. So this is probably a warning that your
1256 * configuration might be wrong. But I'm not really
1257 * sure if there aren't any other situations.
4793ee65
SG
1258 *
1259 * Simon Glass <[email protected]>: We get an ICMP when
1260 * we send a tftp packet to a dead connection, or when
1261 * there is no server at the other end.
2d966958
WD
1262 */
1263 if (ip->ip_p == IPPROTO_ICMP) {
8f79bb17
SG
1264 receive_icmp(ip, len, src_ip, et);
1265 return;
2d966958
WD
1266 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
1267 return;
1268 }
1269
fe728806 1270 if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len))
1271 return;
1272
4ef8d53c 1273 debug_cond(DEBUG_DEV_PKT,
bc0571fc
JH
1274 "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1275 &dst_ip, &src_ip, len);
4ef8d53c 1276
8534bf9a
SR
1277#ifdef CONFIG_UDP_CHECKSUM
1278 if (ip->udp_xsum != 0) {
b2f50807 1279 ulong xsum;
8524423d 1280 u8 *sumptr;
8534bf9a
SR
1281 ushort sumlen;
1282
1283 xsum = ip->ip_p;
1284 xsum += (ntohs(ip->udp_len));
049a95a7
JH
1285 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1286 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
1287 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1288 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
8534bf9a
SR
1289
1290 sumlen = ntohs(ip->udp_len);
8524423d 1291 sumptr = (u8 *)&ip->udp_src;
8534bf9a
SR
1292
1293 while (sumlen > 1) {
8524423d
HS
1294 /* inlined ntohs() to avoid alignment errors */
1295 xsum += (sumptr[0] << 8) + sumptr[1];
1296 sumptr += 2;
8534bf9a
SR
1297 sumlen -= 2;
1298 }
8524423d
HS
1299 if (sumlen > 0)
1300 xsum += (sumptr[0] << 8) + sumptr[0];
8534bf9a 1301 while ((xsum >> 16) != 0) {
3e38e429
LC
1302 xsum = (xsum & 0x0000ffff) +
1303 ((xsum >> 16) & 0x0000ffff);
8534bf9a
SR
1304 }
1305 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
9b55a253 1306 printf(" UDP wrong checksum %08lx %08x\n",
bc0571fc 1307 xsum, ntohs(ip->udp_xsum));
8534bf9a
SR
1308 return;
1309 }
1310 }
1311#endif
1312
66c89ee3 1313#if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
594c26f8 1314 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
bc0571fc
JH
1315 src_ip,
1316 ntohs(ip->udp_dst),
1317 ntohs(ip->udp_src),
1318 ntohs(ip->udp_len) - UDP_HDR_SIZE);
68ceb29e 1319#endif
2d966958 1320 /*
bc0571fc 1321 * IP header OK. Pass the packet to the current handler.
2d966958 1322 */
ece223b5 1323 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
bc0571fc
JH
1324 ntohs(ip->udp_dst),
1325 src_ip,
1326 ntohs(ip->udp_src),
1327 ntohs(ip->udp_len) - UDP_HDR_SIZE);
2d966958 1328 break;
d8970dae
LF
1329#ifdef CONFIG_CMD_WOL
1330 case PROT_WOL:
1331 wol_receive(ip, len);
1332 break;
1333#endif
2d966958
WD
1334 }
1335}
1336
2d966958
WD
1337/**********************************************************************/
1338
e4bf0c5c 1339static int net_check_prereq(enum proto_t protocol)
2d966958
WD
1340{
1341 switch (protocol) {
6e592385 1342 /* Fall through */
643d1ab2 1343#if defined(CONFIG_CMD_PING)
73a8b27c 1344 case PING:
049a95a7 1345 if (net_ping_ip.s_addr == 0) {
4f63acd0 1346 puts("*** ERROR: ping address not given\n");
92895de9 1347 return 1;
6e592385
WD
1348 }
1349 goto common;
cbd8a35c 1350#endif
643d1ab2 1351#if defined(CONFIG_CMD_SNTP)
ea287deb 1352 case SNTP:
049a95a7 1353 if (net_ntp_server.s_addr == 0) {
4f63acd0 1354 puts("*** ERROR: NTP server address not given\n");
92895de9 1355 return 1;
ea287deb
WD
1356 }
1357 goto common;
1358#endif
1a32bf41
RG
1359#if defined(CONFIG_CMD_DNS)
1360 case DNS:
049a95a7 1361 if (net_dns_server.s_addr == 0) {
1a32bf41
RG
1362 puts("*** ERROR: DNS server address not given\n");
1363 return 1;
1364 }
1365 goto common;
1366#endif
643d1ab2 1367#if defined(CONFIG_CMD_NFS)
cbd8a35c 1368 case NFS:
73a8b27c 1369#endif
bc0571fc 1370 /* Fall through */
e4bf0c5c 1371 case TFTPGET:
1fb7cd49 1372 case TFTPPUT:
3a66fcb7 1373 if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) {
4f63acd0 1374 puts("*** ERROR: `serverip' not set\n");
92895de9 1375 return 1;
6e592385 1376 }
4f63acd0
LC
1377#if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
1378 defined(CONFIG_CMD_DNS)
1379common:
73a8b27c 1380#endif
8b6bbe10 1381 /* Fall through */
73a8b27c 1382
8b6bbe10 1383 case NETCONS:
f73a7df9 1384 case FASTBOOT:
7a83af07 1385 case TFTPSRV:
049a95a7 1386 if (net_ip.s_addr == 0) {
4f63acd0 1387 puts("*** ERROR: `ipaddr' not set\n");
92895de9 1388 return 1;
6e592385
WD
1389 }
1390 /* Fall through */
2d966958 1391
bf6cb247 1392#ifdef CONFIG_CMD_RARP
2d966958 1393 case RARP:
bf6cb247 1394#endif
2d966958 1395 case BOOTP:
a3d991bd 1396 case CDP:
bf6cb247 1397 case DHCP:
d22c338e 1398 case LINKLOCAL:
0adb5b76 1399 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
4f63acd0 1400 int num = eth_get_dev_index();
2d966958 1401
6e592385
WD
1402 switch (num) {
1403 case -1:
4f63acd0 1404 puts("*** ERROR: No ethernet found.\n");
92895de9 1405 return 1;
6e592385 1406 case 0:
4f63acd0 1407 puts("*** ERROR: `ethaddr' not set\n");
2d966958 1408 break;
6e592385 1409 default:
4f63acd0 1410 printf("*** ERROR: `eth%daddr' not set\n",
bc0571fc 1411 num);
2d966958 1412 break;
6e592385 1413 }
2d966958 1414
bc0571fc 1415 net_start_again();
92895de9 1416 return 2;
6e592385
WD
1417 }
1418 /* Fall through */
1419 default:
92895de9 1420 return 0;
2d966958 1421 }
92895de9 1422 return 0; /* OK */
2d966958
WD
1423}
1424/**********************************************************************/
1425
a3d991bd 1426int
1203fcce 1427net_eth_hdr_size(void)
a3d991bd
WD
1428{
1429 ushort myvlanid;
2d966958 1430
4fd5055f 1431 myvlanid = ntohs(net_our_vlan);
a3d991bd
WD
1432 if (myvlanid == (ushort)-1)
1433 myvlanid = VLAN_NONE;
1434
3e38e429
LC
1435 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1436 VLAN_ETHER_HDR_SIZE;
a3d991bd
WD
1437}
1438
1203fcce 1439int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
2d966958 1440{
cb487f56 1441 struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
a3d991bd
WD
1442 ushort myvlanid;
1443
4fd5055f 1444 myvlanid = ntohs(net_our_vlan);
a3d991bd
WD
1445 if (myvlanid == (ushort)-1)
1446 myvlanid = VLAN_NONE;
2d966958 1447
0adb5b76
JH
1448 memcpy(et->et_dest, dest_ethaddr, 6);
1449 memcpy(et->et_src, net_ethaddr, 6);
a3d991bd 1450 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
c819abee 1451 et->et_protlen = htons(prot);
a3d991bd
WD
1452 return ETHER_HDR_SIZE;
1453 } else {
c68cca35
JH
1454 struct vlan_ethernet_hdr *vet =
1455 (struct vlan_ethernet_hdr *)xet;
2d966958 1456
a3d991bd
WD
1457 vet->vet_vlan_type = htons(PROT_VLAN);
1458 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1459 vet->vet_type = htons(prot);
1460 return VLAN_ETHER_HDR_SIZE;
1461 }
1462}
2d966958 1463
e7111015
JH
1464int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1465{
1466 ushort protlen;
1467
1468 memcpy(et->et_dest, addr, 6);
0adb5b76 1469 memcpy(et->et_src, net_ethaddr, 6);
e7111015
JH
1470 protlen = ntohs(et->et_protlen);
1471 if (protlen == PROT_VLAN) {
1472 struct vlan_ethernet_hdr *vet =
1473 (struct vlan_ethernet_hdr *)et;
1474 vet->vet_type = htons(prot);
1475 return VLAN_ETHER_HDR_SIZE;
1476 } else if (protlen > 1514) {
1477 et->et_protlen = htons(prot);
1478 return ETHER_HDR_SIZE;
1479 } else {
1480 /* 802.2 + SNAP */
1481 struct e802_hdr *et802 = (struct e802_hdr *)et;
1482 et802->et_prot = htons(prot);
1483 return E802_HDR_SIZE;
1484 }
1485}
1486
5d457ecb
DH
1487void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
1488 u16 pkt_len, u8 proto)
2d966958 1489{
4b11c916 1490 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
2d966958
WD
1491
1492 /*
4b11c916 1493 * Construct an IP header.
2d966958 1494 */
3e38e429
LC
1495 /* IP_HDR_SIZE / 4 (not including UDP) */
1496 ip->ip_hl_v = 0x45;
2d966958 1497 ip->ip_tos = 0;
5d457ecb
DH
1498 ip->ip_len = htons(pkt_len);
1499 ip->ip_p = proto;
bc0571fc 1500 ip->ip_id = htons(net_ip_id++);
e0c07b86 1501 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
2d966958 1502 ip->ip_ttl = 255;
2d966958 1503 ip->ip_sum = 0;
3e38e429 1504 /* already in network byte order */
049a95a7 1505 net_copy_ip((void *)&ip->ip_src, &source);
4b11c916 1506 /* already in network byte order */
049a95a7 1507 net_copy_ip((void *)&ip->ip_dst, &dest);
5d457ecb
DH
1508
1509 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
4b11c916
JH
1510}
1511
049a95a7 1512void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
4b11c916
JH
1513 int len)
1514{
1515 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1516
1517 /*
1518 * If the data is an odd number of bytes, zero the
1519 * byte after the last byte so that the checksum
1520 * will work.
1521 */
1522 if (len & 1)
1523 pkt[IP_UDP_HDR_SIZE + len] = 0;
1524
5d457ecb
DH
1525 net_set_ip_header(pkt, dest, net_ip, IP_UDP_HDR_SIZE + len,
1526 IPPROTO_UDP);
4b11c916 1527
2d966958
WD
1528 ip->udp_src = htons(sport);
1529 ip->udp_dst = htons(dport);
594c26f8 1530 ip->udp_len = htons(UDP_HDR_SIZE + len);
2d966958 1531 ip->udp_xsum = 0;
2d966958
WD
1532}
1533
4f63acd0 1534void copy_filename(char *dst, const char *src, int size)
2d966958 1535{
16cf145f 1536 if (src && *src && (*src == '"')) {
2d966958
WD
1537 ++src;
1538 --size;
1539 }
1540
16cf145f 1541 while ((--size > 0) && src && *src && (*src != '"'))
2d966958 1542 *dst++ = *src++;
2d966958
WD
1543 *dst = '\0';
1544}
1545
3a66fcb7
JH
1546int is_serverip_in_cmd(void)
1547{
1548 return !!strchr(net_boot_file_name, ':');
1549}
1550
6ab12830
JH
1551int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len)
1552{
1553 char *colon;
1554
1555 if (net_boot_file_name[0] == '\0')
1556 return 0;
1557
1558 colon = strchr(net_boot_file_name, ':');
1559 if (colon) {
1560 if (ipaddr)
1561 *ipaddr = string_to_ip(net_boot_file_name);
1562 strncpy(filename, colon + 1, max_len);
1563 } else {
1564 strncpy(filename, net_boot_file_name, max_len);
1565 }
1566 filename[max_len - 1] = '\0';
1567
1568 return 1;
1569}
1570
049a95a7 1571void ip_to_string(struct in_addr x, char *s)
2d966958 1572{
049a95a7 1573 x.s_addr = ntohl(x.s_addr);
4f63acd0 1574 sprintf(s, "%d.%d.%d.%d",
049a95a7
JH
1575 (int) ((x.s_addr >> 24) & 0xff),
1576 (int) ((x.s_addr >> 16) & 0xff),
1577 (int) ((x.s_addr >> 8) & 0xff),
1578 (int) ((x.s_addr >> 0) & 0xff)
6e592385 1579 );
2d966958
WD
1580}
1581
4fd5055f 1582void vlan_to_string(ushort x, char *s)
a3d991bd
WD
1583{
1584 x = ntohs(x);
1585
1586 if (x == (ushort)-1)
1587 x = VLAN_NONE;
1588
1589 if (x == VLAN_NONE)
1590 strcpy(s, "none");
1591 else
1592 sprintf(s, "%d", x & VLAN_IDMASK);
1593}
1594
4fd5055f 1595ushort string_to_vlan(const char *s)
a3d991bd
WD
1596{
1597 ushort id;
1598
1599 if (s == NULL)
b9711de1 1600 return htons(VLAN_NONE);
a3d991bd
WD
1601
1602 if (*s < '0' || *s > '9')
1603 id = VLAN_NONE;
1604 else
1605 id = (ushort)simple_strtoul(s, NULL, 10);
1606
b9711de1 1607 return htons(id);
a3d991bd
WD
1608}
1609
723806cc 1610ushort env_get_vlan(char *var)
a3d991bd 1611{
00caae6d 1612 return string_to_vlan(env_get(var));
a3d991bd 1613}
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