net.c 37 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  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, wd@denx.de
  10. */
  11. /*
  12. * General Desription:
  13. *
  14. * The user interface supports commands for BOOTP, RARP, and TFTP.
  15. * Also, we support ARP internally. Depending on available data,
  16. * these interact as follows:
  17. *
  18. * BOOTP:
  19. *
  20. * Prerequisites: - own ethernet address
  21. * We want: - own IP address
  22. * - TFTP server IP address
  23. * - name of bootfile
  24. * Next step: ARP
  25. *
  26. * LINK_LOCAL:
  27. *
  28. * Prerequisites: - own ethernet address
  29. * We want: - own IP address
  30. * Next step: ARP
  31. *
  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. *
  49. * Prerequisites: - own ethernet address
  50. * We want: - IP, Netmask, ServerIP, Gateway IP
  51. * - bootfilename, lease time
  52. * Next step: - TFTP
  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
  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
  73. *
  74. * SNTP:
  75. *
  76. * Prerequisites: - own ethernet address
  77. * - own IP address
  78. * We want: - network time
  79. * Next step: none
  80. *
  81. * WOL:
  82. *
  83. * Prerequisites: - own ethernet address
  84. * We want: - magic packet or timeout
  85. * Next step: none
  86. */
  87. #include <common.h>
  88. #include <command.h>
  89. #include <console.h>
  90. #include <env.h>
  91. #include <env_internal.h>
  92. #include <errno.h>
  93. #include <net.h>
  94. #include <net/fastboot.h>
  95. #include <net/tftp.h>
  96. #if defined(CONFIG_CMD_PCAP)
  97. #include <net/pcap.h>
  98. #endif
  99. #if defined(CONFIG_LED_STATUS)
  100. #include <miiphy.h>
  101. #include <status_led.h>
  102. #endif
  103. #include <watchdog.h>
  104. #include <linux/compiler.h>
  105. #include "arp.h"
  106. #include "bootp.h"
  107. #include "cdp.h"
  108. #if defined(CONFIG_CMD_DNS)
  109. #include "dns.h"
  110. #endif
  111. #include "link_local.h"
  112. #include "nfs.h"
  113. #include "ping.h"
  114. #include "rarp.h"
  115. #if defined(CONFIG_CMD_SNTP)
  116. #include "sntp.h"
  117. #endif
  118. #if defined(CONFIG_CMD_WOL)
  119. #include "wol.h"
  120. #endif
  121. /** BOOTP EXTENTIONS **/
  122. /* Our subnet mask (0=unknown) */
  123. struct in_addr net_netmask;
  124. /* Our gateways IP address */
  125. struct in_addr net_gateway;
  126. /* Our DNS IP address */
  127. struct in_addr net_dns_server;
  128. #if defined(CONFIG_BOOTP_DNS2)
  129. /* Our 2nd DNS IP address */
  130. struct in_addr net_dns_server2;
  131. #endif
  132. /** END OF BOOTP EXTENTIONS **/
  133. /* Our ethernet address */
  134. u8 net_ethaddr[6];
  135. /* Boot server enet address */
  136. u8 net_server_ethaddr[6];
  137. /* Our IP addr (0 = unknown) */
  138. struct in_addr net_ip;
  139. /* Server IP addr (0 = unknown) */
  140. struct in_addr net_server_ip;
  141. /* Current receive packet */
  142. uchar *net_rx_packet;
  143. /* Current rx packet length */
  144. int net_rx_packet_len;
  145. /* IP packet ID */
  146. static unsigned net_ip_id;
  147. /* Ethernet bcast address */
  148. const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
  149. const u8 net_null_ethaddr[6];
  150. #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
  151. void (*push_packet)(void *, int len) = 0;
  152. #endif
  153. /* Network loop state */
  154. enum net_loop_state net_state;
  155. /* Tried all network devices */
  156. int net_restart_wrap;
  157. /* Network loop restarted */
  158. static int net_restarted;
  159. /* At least one device configured */
  160. static int net_dev_exists;
  161. /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
  162. /* default is without VLAN */
  163. ushort net_our_vlan = 0xFFFF;
  164. /* ditto */
  165. ushort net_native_vlan = 0xFFFF;
  166. /* Boot File name */
  167. char net_boot_file_name[1024];
  168. /* Indicates whether the file name was specified on the command line */
  169. bool net_boot_file_name_explicit;
  170. /* The actual transferred size of the bootfile (in bytes) */
  171. u32 net_boot_file_size;
  172. /* Boot file size in blocks as reported by the DHCP server */
  173. u32 net_boot_file_expected_size_in_blocks;
  174. #if defined(CONFIG_CMD_SNTP)
  175. /* NTP server IP address */
  176. struct in_addr net_ntp_server;
  177. /* offset time from UTC */
  178. int net_ntp_time_offset;
  179. #endif
  180. static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN];
  181. /* Receive packets */
  182. uchar *net_rx_packets[PKTBUFSRX];
  183. /* Current UDP RX packet handler */
  184. static rxhand_f *udp_packet_handler;
  185. /* Current ARP RX packet handler */
  186. static rxhand_f *arp_packet_handler;
  187. #ifdef CONFIG_CMD_TFTPPUT
  188. /* Current ICMP rx handler */
  189. static rxhand_icmp_f *packet_icmp_handler;
  190. #endif
  191. /* Current timeout handler */
  192. static thand_f *time_handler;
  193. /* Time base value */
  194. static ulong time_start;
  195. /* Current timeout value */
  196. static ulong time_delta;
  197. /* THE transmit packet */
  198. uchar *net_tx_packet;
  199. static int net_check_prereq(enum proto_t protocol);
  200. static int net_try_count;
  201. int __maybe_unused net_busy_flag;
  202. /**********************************************************************/
  203. static int on_ipaddr(const char *name, const char *value, enum env_op op,
  204. int flags)
  205. {
  206. if (flags & H_PROGRAMMATIC)
  207. return 0;
  208. net_ip = string_to_ip(value);
  209. return 0;
  210. }
  211. U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
  212. static int on_gatewayip(const char *name, const char *value, enum env_op op,
  213. int flags)
  214. {
  215. if (flags & H_PROGRAMMATIC)
  216. return 0;
  217. net_gateway = string_to_ip(value);
  218. return 0;
  219. }
  220. U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
  221. static int on_netmask(const char *name, const char *value, enum env_op op,
  222. int flags)
  223. {
  224. if (flags & H_PROGRAMMATIC)
  225. return 0;
  226. net_netmask = string_to_ip(value);
  227. return 0;
  228. }
  229. U_BOOT_ENV_CALLBACK(netmask, on_netmask);
  230. static int on_serverip(const char *name, const char *value, enum env_op op,
  231. int flags)
  232. {
  233. if (flags & H_PROGRAMMATIC)
  234. return 0;
  235. net_server_ip = string_to_ip(value);
  236. return 0;
  237. }
  238. U_BOOT_ENV_CALLBACK(serverip, on_serverip);
  239. static int on_nvlan(const char *name, const char *value, enum env_op op,
  240. int flags)
  241. {
  242. if (flags & H_PROGRAMMATIC)
  243. return 0;
  244. net_native_vlan = string_to_vlan(value);
  245. return 0;
  246. }
  247. U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
  248. static int on_vlan(const char *name, const char *value, enum env_op op,
  249. int flags)
  250. {
  251. if (flags & H_PROGRAMMATIC)
  252. return 0;
  253. net_our_vlan = string_to_vlan(value);
  254. return 0;
  255. }
  256. U_BOOT_ENV_CALLBACK(vlan, on_vlan);
  257. #if defined(CONFIG_CMD_DNS)
  258. static int on_dnsip(const char *name, const char *value, enum env_op op,
  259. int flags)
  260. {
  261. if (flags & H_PROGRAMMATIC)
  262. return 0;
  263. net_dns_server = string_to_ip(value);
  264. return 0;
  265. }
  266. U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
  267. #endif
  268. /*
  269. * Check if autoload is enabled. If so, use either NFS or TFTP to download
  270. * the boot file.
  271. */
  272. void net_auto_load(void)
  273. {
  274. #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
  275. const char *s = env_get("autoload");
  276. if (s != NULL && strcmp(s, "NFS") == 0) {
  277. if (net_check_prereq(NFS)) {
  278. /* We aren't expecting to get a serverip, so just accept the assigned IP */
  279. #ifdef CONFIG_BOOTP_SERVERIP
  280. net_set_state(NETLOOP_SUCCESS);
  281. #else
  282. printf("Cannot autoload with NFS\n");
  283. net_set_state(NETLOOP_FAIL);
  284. #endif
  285. return;
  286. }
  287. /*
  288. * Use NFS to load the bootfile.
  289. */
  290. nfs_start();
  291. return;
  292. }
  293. #endif
  294. if (env_get_yesno("autoload") == 0) {
  295. /*
  296. * Just use BOOTP/RARP to configure system;
  297. * Do not use TFTP to load the bootfile.
  298. */
  299. net_set_state(NETLOOP_SUCCESS);
  300. return;
  301. }
  302. if (net_check_prereq(TFTPGET)) {
  303. /* We aren't expecting to get a serverip, so just accept the assigned IP */
  304. #ifdef CONFIG_BOOTP_SERVERIP
  305. net_set_state(NETLOOP_SUCCESS);
  306. #else
  307. printf("Cannot autoload with TFTPGET\n");
  308. net_set_state(NETLOOP_FAIL);
  309. #endif
  310. return;
  311. }
  312. tftp_start(TFTPGET);
  313. }
  314. static void net_init_loop(void)
  315. {
  316. if (eth_get_dev())
  317. memcpy(net_ethaddr, eth_get_ethaddr(), 6);
  318. return;
  319. }
  320. static void net_clear_handlers(void)
  321. {
  322. net_set_udp_handler(NULL);
  323. net_set_arp_handler(NULL);
  324. net_set_timeout_handler(0, NULL);
  325. }
  326. static void net_cleanup_loop(void)
  327. {
  328. net_clear_handlers();
  329. }
  330. void net_init(void)
  331. {
  332. static int first_call = 1;
  333. if (first_call) {
  334. /*
  335. * Setup packet buffers, aligned correctly.
  336. */
  337. int i;
  338. net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
  339. net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
  340. for (i = 0; i < PKTBUFSRX; i++) {
  341. net_rx_packets[i] = net_tx_packet +
  342. (i + 1) * PKTSIZE_ALIGN;
  343. }
  344. arp_init();
  345. net_clear_handlers();
  346. /* Only need to setup buffer pointers once. */
  347. first_call = 0;
  348. }
  349. net_init_loop();
  350. }
  351. /**********************************************************************/
  352. /*
  353. * Main network processing loop.
  354. */
  355. int net_loop(enum proto_t protocol)
  356. {
  357. int ret = -EINVAL;
  358. enum net_loop_state prev_net_state = net_state;
  359. net_restarted = 0;
  360. net_dev_exists = 0;
  361. net_try_count = 1;
  362. debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
  363. bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
  364. net_init();
  365. if (eth_is_on_demand_init() || protocol != NETCONS) {
  366. eth_halt();
  367. eth_set_current();
  368. ret = eth_init();
  369. if (ret < 0) {
  370. eth_halt();
  371. return ret;
  372. }
  373. } else {
  374. eth_init_state_only();
  375. }
  376. restart:
  377. #ifdef CONFIG_USB_KEYBOARD
  378. net_busy_flag = 0;
  379. #endif
  380. net_set_state(NETLOOP_CONTINUE);
  381. /*
  382. * Start the ball rolling with the given start function. From
  383. * here on, this code is a state machine driven by received
  384. * packets and timer events.
  385. */
  386. debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
  387. net_init_loop();
  388. switch (net_check_prereq(protocol)) {
  389. case 1:
  390. /* network not configured */
  391. eth_halt();
  392. net_set_state(prev_net_state);
  393. return -ENODEV;
  394. case 2:
  395. /* network device not configured */
  396. break;
  397. case 0:
  398. net_dev_exists = 1;
  399. net_boot_file_size = 0;
  400. switch (protocol) {
  401. case TFTPGET:
  402. #ifdef CONFIG_CMD_TFTPPUT
  403. case TFTPPUT:
  404. #endif
  405. /* always use ARP to get server ethernet address */
  406. tftp_start(protocol);
  407. break;
  408. #ifdef CONFIG_CMD_TFTPSRV
  409. case TFTPSRV:
  410. tftp_start_server();
  411. break;
  412. #endif
  413. #ifdef CONFIG_UDP_FUNCTION_FASTBOOT
  414. case FASTBOOT:
  415. fastboot_start_server();
  416. break;
  417. #endif
  418. #if defined(CONFIG_CMD_DHCP)
  419. case DHCP:
  420. bootp_reset();
  421. net_ip.s_addr = 0;
  422. dhcp_request(); /* Basically same as BOOTP */
  423. break;
  424. #endif
  425. case BOOTP:
  426. bootp_reset();
  427. net_ip.s_addr = 0;
  428. bootp_request();
  429. break;
  430. #if defined(CONFIG_CMD_RARP)
  431. case RARP:
  432. rarp_try = 0;
  433. net_ip.s_addr = 0;
  434. rarp_request();
  435. break;
  436. #endif
  437. #if defined(CONFIG_CMD_PING)
  438. case PING:
  439. ping_start();
  440. break;
  441. #endif
  442. #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
  443. case NFS:
  444. nfs_start();
  445. break;
  446. #endif
  447. #if defined(CONFIG_CMD_CDP)
  448. case CDP:
  449. cdp_start();
  450. break;
  451. #endif
  452. #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
  453. case NETCONS:
  454. nc_start();
  455. break;
  456. #endif
  457. #if defined(CONFIG_CMD_SNTP)
  458. case SNTP:
  459. sntp_start();
  460. break;
  461. #endif
  462. #if defined(CONFIG_CMD_DNS)
  463. case DNS:
  464. dns_start();
  465. break;
  466. #endif
  467. #if defined(CONFIG_CMD_LINK_LOCAL)
  468. case LINKLOCAL:
  469. link_local_start();
  470. break;
  471. #endif
  472. #if defined(CONFIG_CMD_WOL)
  473. case WOL:
  474. wol_start();
  475. break;
  476. #endif
  477. default:
  478. break;
  479. }
  480. break;
  481. }
  482. #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
  483. #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
  484. defined(CONFIG_LED_STATUS) && \
  485. defined(CONFIG_LED_STATUS_RED)
  486. /*
  487. * Echo the inverted link state to the fault LED.
  488. */
  489. if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
  490. status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
  491. else
  492. status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
  493. #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
  494. #endif /* CONFIG_MII, ... */
  495. #ifdef CONFIG_USB_KEYBOARD
  496. net_busy_flag = 1;
  497. #endif
  498. /*
  499. * Main packet reception loop. Loop receiving packets until
  500. * someone sets `net_state' to a state that terminates.
  501. */
  502. for (;;) {
  503. WATCHDOG_RESET();
  504. if (arp_timeout_check() > 0)
  505. time_start = get_timer(0);
  506. /*
  507. * Check the ethernet for a new packet. The ethernet
  508. * receive routine will process it.
  509. * Most drivers return the most recent packet size, but not
  510. * errors that may have happened.
  511. */
  512. eth_rx();
  513. /*
  514. * Abort if ctrl-c was pressed.
  515. */
  516. if (ctrlc()) {
  517. /* cancel any ARP that may not have completed */
  518. net_arp_wait_packet_ip.s_addr = 0;
  519. net_cleanup_loop();
  520. eth_halt();
  521. /* Invalidate the last protocol */
  522. eth_set_last_protocol(BOOTP);
  523. puts("\nAbort\n");
  524. /* include a debug print as well incase the debug
  525. messages are directed to stderr */
  526. debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
  527. ret = -EINTR;
  528. goto done;
  529. }
  530. /*
  531. * Check for a timeout, and run the timeout handler
  532. * if we have one.
  533. */
  534. if (time_handler &&
  535. ((get_timer(0) - time_start) > time_delta)) {
  536. thand_f *x;
  537. #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
  538. #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \
  539. defined(CONFIG_LED_STATUS) && \
  540. defined(CONFIG_LED_STATUS_RED)
  541. /*
  542. * Echo the inverted link state to the fault LED.
  543. */
  544. if (miiphy_link(eth_get_dev()->name,
  545. CONFIG_SYS_FAULT_MII_ADDR))
  546. status_led_set(CONFIG_LED_STATUS_RED,
  547. CONFIG_LED_STATUS_OFF);
  548. else
  549. status_led_set(CONFIG_LED_STATUS_RED,
  550. CONFIG_LED_STATUS_ON);
  551. #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
  552. #endif /* CONFIG_MII, ... */
  553. debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
  554. x = time_handler;
  555. time_handler = (thand_f *)0;
  556. (*x)();
  557. }
  558. if (net_state == NETLOOP_FAIL)
  559. ret = net_start_again();
  560. switch (net_state) {
  561. case NETLOOP_RESTART:
  562. net_restarted = 1;
  563. goto restart;
  564. case NETLOOP_SUCCESS:
  565. net_cleanup_loop();
  566. if (net_boot_file_size > 0) {
  567. printf("Bytes transferred = %d (%x hex)\n",
  568. net_boot_file_size, net_boot_file_size);
  569. env_set_hex("filesize", net_boot_file_size);
  570. env_set_hex("fileaddr", load_addr);
  571. }
  572. if (protocol != NETCONS)
  573. eth_halt();
  574. else
  575. eth_halt_state_only();
  576. eth_set_last_protocol(protocol);
  577. ret = net_boot_file_size;
  578. debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
  579. goto done;
  580. case NETLOOP_FAIL:
  581. net_cleanup_loop();
  582. /* Invalidate the last protocol */
  583. eth_set_last_protocol(BOOTP);
  584. debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
  585. ret = -ENONET;
  586. goto done;
  587. case NETLOOP_CONTINUE:
  588. continue;
  589. }
  590. }
  591. done:
  592. #ifdef CONFIG_USB_KEYBOARD
  593. net_busy_flag = 0;
  594. #endif
  595. #ifdef CONFIG_CMD_TFTPPUT
  596. /* Clear out the handlers */
  597. net_set_udp_handler(NULL);
  598. net_set_icmp_handler(NULL);
  599. #endif
  600. net_set_state(prev_net_state);
  601. #if defined(CONFIG_CMD_PCAP)
  602. if (pcap_active())
  603. pcap_print_status();
  604. #endif
  605. return ret;
  606. }
  607. /**********************************************************************/
  608. static void start_again_timeout_handler(void)
  609. {
  610. net_set_state(NETLOOP_RESTART);
  611. }
  612. int net_start_again(void)
  613. {
  614. char *nretry;
  615. int retry_forever = 0;
  616. unsigned long retrycnt = 0;
  617. int ret;
  618. nretry = env_get("netretry");
  619. if (nretry) {
  620. if (!strcmp(nretry, "yes"))
  621. retry_forever = 1;
  622. else if (!strcmp(nretry, "no"))
  623. retrycnt = 0;
  624. else if (!strcmp(nretry, "once"))
  625. retrycnt = 1;
  626. else
  627. retrycnt = simple_strtoul(nretry, NULL, 0);
  628. } else {
  629. retrycnt = 0;
  630. retry_forever = 0;
  631. }
  632. if ((!retry_forever) && (net_try_count > retrycnt)) {
  633. eth_halt();
  634. net_set_state(NETLOOP_FAIL);
  635. /*
  636. * We don't provide a way for the protocol to return an error,
  637. * but this is almost always the reason.
  638. */
  639. return -ETIMEDOUT;
  640. }
  641. net_try_count++;
  642. eth_halt();
  643. #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
  644. eth_try_another(!net_restarted);
  645. #endif
  646. ret = eth_init();
  647. if (net_restart_wrap) {
  648. net_restart_wrap = 0;
  649. if (net_dev_exists) {
  650. net_set_timeout_handler(10000UL,
  651. start_again_timeout_handler);
  652. net_set_udp_handler(NULL);
  653. } else {
  654. net_set_state(NETLOOP_FAIL);
  655. }
  656. } else {
  657. net_set_state(NETLOOP_RESTART);
  658. }
  659. return ret;
  660. }
  661. /**********************************************************************/
  662. /*
  663. * Miscelaneous bits.
  664. */
  665. static void dummy_handler(uchar *pkt, unsigned dport,
  666. struct in_addr sip, unsigned sport,
  667. unsigned len)
  668. {
  669. }
  670. rxhand_f *net_get_udp_handler(void)
  671. {
  672. return udp_packet_handler;
  673. }
  674. void net_set_udp_handler(rxhand_f *f)
  675. {
  676. debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
  677. if (f == NULL)
  678. udp_packet_handler = dummy_handler;
  679. else
  680. udp_packet_handler = f;
  681. }
  682. rxhand_f *net_get_arp_handler(void)
  683. {
  684. return arp_packet_handler;
  685. }
  686. void net_set_arp_handler(rxhand_f *f)
  687. {
  688. debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
  689. if (f == NULL)
  690. arp_packet_handler = dummy_handler;
  691. else
  692. arp_packet_handler = f;
  693. }
  694. #ifdef CONFIG_CMD_TFTPPUT
  695. void net_set_icmp_handler(rxhand_icmp_f *f)
  696. {
  697. packet_icmp_handler = f;
  698. }
  699. #endif
  700. void net_set_timeout_handler(ulong iv, thand_f *f)
  701. {
  702. if (iv == 0) {
  703. debug_cond(DEBUG_INT_STATE,
  704. "--- net_loop timeout handler cancelled\n");
  705. time_handler = (thand_f *)0;
  706. } else {
  707. debug_cond(DEBUG_INT_STATE,
  708. "--- net_loop timeout handler set (%p)\n", f);
  709. time_handler = f;
  710. time_start = get_timer(0);
  711. time_delta = iv * CONFIG_SYS_HZ / 1000;
  712. }
  713. }
  714. uchar *net_get_async_tx_pkt_buf(void)
  715. {
  716. if (arp_is_waiting())
  717. return arp_tx_packet; /* If we are waiting, we already sent */
  718. else
  719. return net_tx_packet;
  720. }
  721. int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
  722. int payload_len)
  723. {
  724. return net_send_ip_packet(ether, dest, dport, sport, payload_len,
  725. IPPROTO_UDP, 0, 0, 0);
  726. }
  727. int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
  728. int payload_len, int proto, u8 action, u32 tcp_seq_num,
  729. u32 tcp_ack_num)
  730. {
  731. uchar *pkt;
  732. int eth_hdr_size;
  733. int pkt_hdr_size;
  734. /* make sure the net_tx_packet is initialized (net_init() was called) */
  735. assert(net_tx_packet != NULL);
  736. if (net_tx_packet == NULL)
  737. return -1;
  738. /* convert to new style broadcast */
  739. if (dest.s_addr == 0)
  740. dest.s_addr = 0xFFFFFFFF;
  741. /* if broadcast, make the ether address a broadcast and don't do ARP */
  742. if (dest.s_addr == 0xFFFFFFFF)
  743. ether = (uchar *)net_bcast_ethaddr;
  744. pkt = (uchar *)net_tx_packet;
  745. eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
  746. switch (proto) {
  747. case IPPROTO_UDP:
  748. net_set_udp_header(pkt + eth_hdr_size, dest, dport, sport,
  749. payload_len);
  750. pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
  751. break;
  752. default:
  753. return -EINVAL;
  754. }
  755. /* if MAC address was not discovered yet, do an ARP request */
  756. if (memcmp(ether, net_null_ethaddr, 6) == 0) {
  757. debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
  758. /* save the ip and eth addr for the packet to send after arp */
  759. net_arp_wait_packet_ip = dest;
  760. arp_wait_packet_ethaddr = ether;
  761. /* size of the waiting packet */
  762. arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
  763. /* and do the ARP request */
  764. arp_wait_try = 1;
  765. arp_wait_timer_start = get_timer(0);
  766. arp_request();
  767. return 1; /* waiting */
  768. } else {
  769. debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
  770. &dest, ether);
  771. net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
  772. return 0; /* transmitted */
  773. }
  774. }
  775. #ifdef CONFIG_IP_DEFRAG
  776. /*
  777. * This function collects fragments in a single packet, according
  778. * to the algorithm in RFC815. It returns NULL or the pointer to
  779. * a complete packet, in static storage
  780. */
  781. #ifndef CONFIG_NET_MAXDEFRAG
  782. #define CONFIG_NET_MAXDEFRAG 16384
  783. #endif
  784. #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
  785. #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
  786. /*
  787. * this is the packet being assembled, either data or frag control.
  788. * Fragments go by 8 bytes, so this union must be 8 bytes long
  789. */
  790. struct hole {
  791. /* first_byte is address of this structure */
  792. u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */
  793. u16 next_hole; /* index of next (in 8-b blocks), 0 == none */
  794. u16 prev_hole; /* index of prev, 0 == none */
  795. u16 unused;
  796. };
  797. static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
  798. {
  799. static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
  800. static u16 first_hole, total_len;
  801. struct hole *payload, *thisfrag, *h, *newh;
  802. struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
  803. uchar *indata = (uchar *)ip;
  804. int offset8, start, len, done = 0;
  805. u16 ip_off = ntohs(ip->ip_off);
  806. /* payload starts after IP header, this fragment is in there */
  807. payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
  808. offset8 = (ip_off & IP_OFFS);
  809. thisfrag = payload + offset8;
  810. start = offset8 * 8;
  811. len = ntohs(ip->ip_len) - IP_HDR_SIZE;
  812. if (start + len > IP_MAXUDP) /* fragment extends too far */
  813. return NULL;
  814. if (!total_len || localip->ip_id != ip->ip_id) {
  815. /* new (or different) packet, reset structs */
  816. total_len = 0xffff;
  817. payload[0].last_byte = ~0;
  818. payload[0].next_hole = 0;
  819. payload[0].prev_hole = 0;
  820. first_hole = 0;
  821. /* any IP header will work, copy the first we received */
  822. memcpy(localip, ip, IP_HDR_SIZE);
  823. }
  824. /*
  825. * What follows is the reassembly algorithm. We use the payload
  826. * array as a linked list of hole descriptors, as each hole starts
  827. * at a multiple of 8 bytes. However, last byte can be whatever value,
  828. * so it is represented as byte count, not as 8-byte blocks.
  829. */
  830. h = payload + first_hole;
  831. while (h->last_byte < start) {
  832. if (!h->next_hole) {
  833. /* no hole that far away */
  834. return NULL;
  835. }
  836. h = payload + h->next_hole;
  837. }
  838. /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
  839. if (offset8 + ((len + 7) / 8) <= h - payload) {
  840. /* no overlap with holes (dup fragment?) */
  841. return NULL;
  842. }
  843. if (!(ip_off & IP_FLAGS_MFRAG)) {
  844. /* no more fragmentss: truncate this (last) hole */
  845. total_len = start + len;
  846. h->last_byte = start + len;
  847. }
  848. /*
  849. * There is some overlap: fix the hole list. This code doesn't
  850. * deal with a fragment that overlaps with two different holes
  851. * (thus being a superset of a previously-received fragment).
  852. */
  853. if ((h >= thisfrag) && (h->last_byte <= start + len)) {
  854. /* complete overlap with hole: remove hole */
  855. if (!h->prev_hole && !h->next_hole) {
  856. /* last remaining hole */
  857. done = 1;
  858. } else if (!h->prev_hole) {
  859. /* first hole */
  860. first_hole = h->next_hole;
  861. payload[h->next_hole].prev_hole = 0;
  862. } else if (!h->next_hole) {
  863. /* last hole */
  864. payload[h->prev_hole].next_hole = 0;
  865. } else {
  866. /* in the middle of the list */
  867. payload[h->next_hole].prev_hole = h->prev_hole;
  868. payload[h->prev_hole].next_hole = h->next_hole;
  869. }
  870. } else if (h->last_byte <= start + len) {
  871. /* overlaps with final part of the hole: shorten this hole */
  872. h->last_byte = start;
  873. } else if (h >= thisfrag) {
  874. /* overlaps with initial part of the hole: move this hole */
  875. newh = thisfrag + (len / 8);
  876. *newh = *h;
  877. h = newh;
  878. if (h->next_hole)
  879. payload[h->next_hole].prev_hole = (h - payload);
  880. if (h->prev_hole)
  881. payload[h->prev_hole].next_hole = (h - payload);
  882. else
  883. first_hole = (h - payload);
  884. } else {
  885. /* fragment sits in the middle: split the hole */
  886. newh = thisfrag + (len / 8);
  887. *newh = *h;
  888. h->last_byte = start;
  889. h->next_hole = (newh - payload);
  890. newh->prev_hole = (h - payload);
  891. if (newh->next_hole)
  892. payload[newh->next_hole].prev_hole = (newh - payload);
  893. }
  894. /* finally copy this fragment and possibly return whole packet */
  895. memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
  896. if (!done)
  897. return NULL;
  898. localip->ip_len = htons(total_len);
  899. *lenp = total_len + IP_HDR_SIZE;
  900. return localip;
  901. }
  902. static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
  903. int *lenp)
  904. {
  905. u16 ip_off = ntohs(ip->ip_off);
  906. if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
  907. return ip; /* not a fragment */
  908. return __net_defragment(ip, lenp);
  909. }
  910. #else /* !CONFIG_IP_DEFRAG */
  911. static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
  912. int *lenp)
  913. {
  914. u16 ip_off = ntohs(ip->ip_off);
  915. if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
  916. return ip; /* not a fragment */
  917. return NULL;
  918. }
  919. #endif
  920. /**
  921. * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
  922. * drop others.
  923. *
  924. * @parma ip IP packet containing the ICMP
  925. */
  926. static void receive_icmp(struct ip_udp_hdr *ip, int len,
  927. struct in_addr src_ip, struct ethernet_hdr *et)
  928. {
  929. struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
  930. switch (icmph->type) {
  931. case ICMP_REDIRECT:
  932. if (icmph->code != ICMP_REDIR_HOST)
  933. return;
  934. printf(" ICMP Host Redirect to %pI4 ",
  935. &icmph->un.gateway);
  936. break;
  937. default:
  938. #if defined(CONFIG_CMD_PING)
  939. ping_receive(et, ip, len);
  940. #endif
  941. #ifdef CONFIG_CMD_TFTPPUT
  942. if (packet_icmp_handler)
  943. packet_icmp_handler(icmph->type, icmph->code,
  944. ntohs(ip->udp_dst), src_ip,
  945. ntohs(ip->udp_src), icmph->un.data,
  946. ntohs(ip->udp_len));
  947. #endif
  948. break;
  949. }
  950. }
  951. void net_process_received_packet(uchar *in_packet, int len)
  952. {
  953. struct ethernet_hdr *et;
  954. struct ip_udp_hdr *ip;
  955. struct in_addr dst_ip;
  956. struct in_addr src_ip;
  957. int eth_proto;
  958. #if defined(CONFIG_CMD_CDP)
  959. int iscdp;
  960. #endif
  961. ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
  962. debug_cond(DEBUG_NET_PKT, "packet received\n");
  963. #if defined(CONFIG_CMD_PCAP)
  964. pcap_post(in_packet, len, false);
  965. #endif
  966. net_rx_packet = in_packet;
  967. net_rx_packet_len = len;
  968. et = (struct ethernet_hdr *)in_packet;
  969. /* too small packet? */
  970. if (len < ETHER_HDR_SIZE)
  971. return;
  972. #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
  973. if (push_packet) {
  974. (*push_packet)(in_packet, len);
  975. return;
  976. }
  977. #endif
  978. #if defined(CONFIG_CMD_CDP)
  979. /* keep track if packet is CDP */
  980. iscdp = is_cdp_packet(et->et_dest);
  981. #endif
  982. myvlanid = ntohs(net_our_vlan);
  983. if (myvlanid == (ushort)-1)
  984. myvlanid = VLAN_NONE;
  985. mynvlanid = ntohs(net_native_vlan);
  986. if (mynvlanid == (ushort)-1)
  987. mynvlanid = VLAN_NONE;
  988. eth_proto = ntohs(et->et_protlen);
  989. if (eth_proto < 1514) {
  990. struct e802_hdr *et802 = (struct e802_hdr *)et;
  991. /*
  992. * Got a 802.2 packet. Check the other protocol field.
  993. * XXX VLAN over 802.2+SNAP not implemented!
  994. */
  995. eth_proto = ntohs(et802->et_prot);
  996. ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
  997. len -= E802_HDR_SIZE;
  998. } else if (eth_proto != PROT_VLAN) { /* normal packet */
  999. ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
  1000. len -= ETHER_HDR_SIZE;
  1001. } else { /* VLAN packet */
  1002. struct vlan_ethernet_hdr *vet =
  1003. (struct vlan_ethernet_hdr *)et;
  1004. debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
  1005. /* too small packet? */
  1006. if (len < VLAN_ETHER_HDR_SIZE)
  1007. return;
  1008. /* if no VLAN active */
  1009. if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
  1010. #if defined(CONFIG_CMD_CDP)
  1011. && iscdp == 0
  1012. #endif
  1013. )
  1014. return;
  1015. cti = ntohs(vet->vet_tag);
  1016. vlanid = cti & VLAN_IDMASK;
  1017. eth_proto = ntohs(vet->vet_type);
  1018. ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
  1019. len -= VLAN_ETHER_HDR_SIZE;
  1020. }
  1021. debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
  1022. #if defined(CONFIG_CMD_CDP)
  1023. if (iscdp) {
  1024. cdp_receive((uchar *)ip, len);
  1025. return;
  1026. }
  1027. #endif
  1028. if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
  1029. if (vlanid == VLAN_NONE)
  1030. vlanid = (mynvlanid & VLAN_IDMASK);
  1031. /* not matched? */
  1032. if (vlanid != (myvlanid & VLAN_IDMASK))
  1033. return;
  1034. }
  1035. switch (eth_proto) {
  1036. case PROT_ARP:
  1037. arp_receive(et, ip, len);
  1038. break;
  1039. #ifdef CONFIG_CMD_RARP
  1040. case PROT_RARP:
  1041. rarp_receive(ip, len);
  1042. break;
  1043. #endif
  1044. case PROT_IP:
  1045. debug_cond(DEBUG_NET_PKT, "Got IP\n");
  1046. /* Before we start poking the header, make sure it is there */
  1047. if (len < IP_UDP_HDR_SIZE) {
  1048. debug("len bad %d < %lu\n", len,
  1049. (ulong)IP_UDP_HDR_SIZE);
  1050. return;
  1051. }
  1052. /* Check the packet length */
  1053. if (len < ntohs(ip->ip_len)) {
  1054. debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
  1055. return;
  1056. }
  1057. len = ntohs(ip->ip_len);
  1058. debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
  1059. len, ip->ip_hl_v & 0xff);
  1060. /* Can't deal with anything except IPv4 */
  1061. if ((ip->ip_hl_v & 0xf0) != 0x40)
  1062. return;
  1063. /* Can't deal with IP options (headers != 20 bytes) */
  1064. if ((ip->ip_hl_v & 0x0f) > 0x05)
  1065. return;
  1066. /* Check the Checksum of the header */
  1067. if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
  1068. debug("checksum bad\n");
  1069. return;
  1070. }
  1071. /* If it is not for us, ignore it */
  1072. dst_ip = net_read_ip(&ip->ip_dst);
  1073. if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
  1074. dst_ip.s_addr != 0xFFFFFFFF) {
  1075. return;
  1076. }
  1077. /* Read source IP address for later use */
  1078. src_ip = net_read_ip(&ip->ip_src);
  1079. /*
  1080. * The function returns the unchanged packet if it's not
  1081. * a fragment, and either the complete packet or NULL if
  1082. * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
  1083. */
  1084. ip = net_defragment(ip, &len);
  1085. if (!ip)
  1086. return;
  1087. /*
  1088. * watch for ICMP host redirects
  1089. *
  1090. * There is no real handler code (yet). We just watch
  1091. * for ICMP host redirect messages. In case anybody
  1092. * sees these messages: please contact me
  1093. * (wd@denx.de), or - even better - send me the
  1094. * necessary fixes :-)
  1095. *
  1096. * Note: in all cases where I have seen this so far
  1097. * it was a problem with the router configuration,
  1098. * for instance when a router was configured in the
  1099. * BOOTP reply, but the TFTP server was on the same
  1100. * subnet. So this is probably a warning that your
  1101. * configuration might be wrong. But I'm not really
  1102. * sure if there aren't any other situations.
  1103. *
  1104. * Simon Glass <sjg@chromium.org>: We get an ICMP when
  1105. * we send a tftp packet to a dead connection, or when
  1106. * there is no server at the other end.
  1107. */
  1108. if (ip->ip_p == IPPROTO_ICMP) {
  1109. receive_icmp(ip, len, src_ip, et);
  1110. return;
  1111. } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */
  1112. return;
  1113. }
  1114. if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len))
  1115. return;
  1116. debug_cond(DEBUG_DEV_PKT,
  1117. "received UDP (to=%pI4, from=%pI4, len=%d)\n",
  1118. &dst_ip, &src_ip, len);
  1119. #ifdef CONFIG_UDP_CHECKSUM
  1120. if (ip->udp_xsum != 0) {
  1121. ulong xsum;
  1122. u8 *sumptr;
  1123. ushort sumlen;
  1124. xsum = ip->ip_p;
  1125. xsum += (ntohs(ip->udp_len));
  1126. xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
  1127. xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff;
  1128. xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
  1129. xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff;
  1130. sumlen = ntohs(ip->udp_len);
  1131. sumptr = (u8 *)&ip->udp_src;
  1132. while (sumlen > 1) {
  1133. /* inlined ntohs() to avoid alignment errors */
  1134. xsum += (sumptr[0] << 8) + sumptr[1];
  1135. sumptr += 2;
  1136. sumlen -= 2;
  1137. }
  1138. if (sumlen > 0)
  1139. xsum += (sumptr[0] << 8) + sumptr[0];
  1140. while ((xsum >> 16) != 0) {
  1141. xsum = (xsum & 0x0000ffff) +
  1142. ((xsum >> 16) & 0x0000ffff);
  1143. }
  1144. if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
  1145. printf(" UDP wrong checksum %08lx %08x\n",
  1146. xsum, ntohs(ip->udp_xsum));
  1147. return;
  1148. }
  1149. }
  1150. #endif
  1151. #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
  1152. nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
  1153. src_ip,
  1154. ntohs(ip->udp_dst),
  1155. ntohs(ip->udp_src),
  1156. ntohs(ip->udp_len) - UDP_HDR_SIZE);
  1157. #endif
  1158. /*
  1159. * IP header OK. Pass the packet to the current handler.
  1160. */
  1161. (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
  1162. ntohs(ip->udp_dst),
  1163. src_ip,
  1164. ntohs(ip->udp_src),
  1165. ntohs(ip->udp_len) - UDP_HDR_SIZE);
  1166. break;
  1167. #ifdef CONFIG_CMD_WOL
  1168. case PROT_WOL:
  1169. wol_receive(ip, len);
  1170. break;
  1171. #endif
  1172. }
  1173. }
  1174. /**********************************************************************/
  1175. static int net_check_prereq(enum proto_t protocol)
  1176. {
  1177. switch (protocol) {
  1178. /* Fall through */
  1179. #if defined(CONFIG_CMD_PING)
  1180. case PING:
  1181. if (net_ping_ip.s_addr == 0) {
  1182. puts("*** ERROR: ping address not given\n");
  1183. return 1;
  1184. }
  1185. goto common;
  1186. #endif
  1187. #if defined(CONFIG_CMD_SNTP)
  1188. case SNTP:
  1189. if (net_ntp_server.s_addr == 0) {
  1190. puts("*** ERROR: NTP server address not given\n");
  1191. return 1;
  1192. }
  1193. goto common;
  1194. #endif
  1195. #if defined(CONFIG_CMD_DNS)
  1196. case DNS:
  1197. if (net_dns_server.s_addr == 0) {
  1198. puts("*** ERROR: DNS server address not given\n");
  1199. return 1;
  1200. }
  1201. goto common;
  1202. #endif
  1203. #if defined(CONFIG_CMD_NFS)
  1204. case NFS:
  1205. #endif
  1206. /* Fall through */
  1207. case TFTPGET:
  1208. case TFTPPUT:
  1209. if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) {
  1210. puts("*** ERROR: `serverip' not set\n");
  1211. return 1;
  1212. }
  1213. #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \
  1214. defined(CONFIG_CMD_DNS)
  1215. common:
  1216. #endif
  1217. /* Fall through */
  1218. case NETCONS:
  1219. case FASTBOOT:
  1220. case TFTPSRV:
  1221. if (net_ip.s_addr == 0) {
  1222. puts("*** ERROR: `ipaddr' not set\n");
  1223. return 1;
  1224. }
  1225. /* Fall through */
  1226. #ifdef CONFIG_CMD_RARP
  1227. case RARP:
  1228. #endif
  1229. case BOOTP:
  1230. case CDP:
  1231. case DHCP:
  1232. case LINKLOCAL:
  1233. if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
  1234. int num = eth_get_dev_index();
  1235. switch (num) {
  1236. case -1:
  1237. puts("*** ERROR: No ethernet found.\n");
  1238. return 1;
  1239. case 0:
  1240. puts("*** ERROR: `ethaddr' not set\n");
  1241. break;
  1242. default:
  1243. printf("*** ERROR: `eth%daddr' not set\n",
  1244. num);
  1245. break;
  1246. }
  1247. net_start_again();
  1248. return 2;
  1249. }
  1250. /* Fall through */
  1251. default:
  1252. return 0;
  1253. }
  1254. return 0; /* OK */
  1255. }
  1256. /**********************************************************************/
  1257. int
  1258. net_eth_hdr_size(void)
  1259. {
  1260. ushort myvlanid;
  1261. myvlanid = ntohs(net_our_vlan);
  1262. if (myvlanid == (ushort)-1)
  1263. myvlanid = VLAN_NONE;
  1264. return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
  1265. VLAN_ETHER_HDR_SIZE;
  1266. }
  1267. int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
  1268. {
  1269. struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
  1270. ushort myvlanid;
  1271. myvlanid = ntohs(net_our_vlan);
  1272. if (myvlanid == (ushort)-1)
  1273. myvlanid = VLAN_NONE;
  1274. memcpy(et->et_dest, dest_ethaddr, 6);
  1275. memcpy(et->et_src, net_ethaddr, 6);
  1276. if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
  1277. et->et_protlen = htons(prot);
  1278. return ETHER_HDR_SIZE;
  1279. } else {
  1280. struct vlan_ethernet_hdr *vet =
  1281. (struct vlan_ethernet_hdr *)xet;
  1282. vet->vet_vlan_type = htons(PROT_VLAN);
  1283. vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
  1284. vet->vet_type = htons(prot);
  1285. return VLAN_ETHER_HDR_SIZE;
  1286. }
  1287. }
  1288. int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
  1289. {
  1290. ushort protlen;
  1291. memcpy(et->et_dest, addr, 6);
  1292. memcpy(et->et_src, net_ethaddr, 6);
  1293. protlen = ntohs(et->et_protlen);
  1294. if (protlen == PROT_VLAN) {
  1295. struct vlan_ethernet_hdr *vet =
  1296. (struct vlan_ethernet_hdr *)et;
  1297. vet->vet_type = htons(prot);
  1298. return VLAN_ETHER_HDR_SIZE;
  1299. } else if (protlen > 1514) {
  1300. et->et_protlen = htons(prot);
  1301. return ETHER_HDR_SIZE;
  1302. } else {
  1303. /* 802.2 + SNAP */
  1304. struct e802_hdr *et802 = (struct e802_hdr *)et;
  1305. et802->et_prot = htons(prot);
  1306. return E802_HDR_SIZE;
  1307. }
  1308. }
  1309. void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
  1310. u16 pkt_len, u8 proto)
  1311. {
  1312. struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
  1313. /*
  1314. * Construct an IP header.
  1315. */
  1316. /* IP_HDR_SIZE / 4 (not including UDP) */
  1317. ip->ip_hl_v = 0x45;
  1318. ip->ip_tos = 0;
  1319. ip->ip_len = htons(pkt_len);
  1320. ip->ip_p = proto;
  1321. ip->ip_id = htons(net_ip_id++);
  1322. ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */
  1323. ip->ip_ttl = 255;
  1324. ip->ip_sum = 0;
  1325. /* already in network byte order */
  1326. net_copy_ip((void *)&ip->ip_src, &source);
  1327. /* already in network byte order */
  1328. net_copy_ip((void *)&ip->ip_dst, &dest);
  1329. ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
  1330. }
  1331. void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
  1332. int len)
  1333. {
  1334. struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
  1335. /*
  1336. * If the data is an odd number of bytes, zero the
  1337. * byte after the last byte so that the checksum
  1338. * will work.
  1339. */
  1340. if (len & 1)
  1341. pkt[IP_UDP_HDR_SIZE + len] = 0;
  1342. net_set_ip_header(pkt, dest, net_ip, IP_UDP_HDR_SIZE + len,
  1343. IPPROTO_UDP);
  1344. ip->udp_src = htons(sport);
  1345. ip->udp_dst = htons(dport);
  1346. ip->udp_len = htons(UDP_HDR_SIZE + len);
  1347. ip->udp_xsum = 0;
  1348. }
  1349. void copy_filename(char *dst, const char *src, int size)
  1350. {
  1351. if (src && *src && (*src == '"')) {
  1352. ++src;
  1353. --size;
  1354. }
  1355. while ((--size > 0) && src && *src && (*src != '"'))
  1356. *dst++ = *src++;
  1357. *dst = '\0';
  1358. }
  1359. int is_serverip_in_cmd(void)
  1360. {
  1361. return !!strchr(net_boot_file_name, ':');
  1362. }
  1363. int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len)
  1364. {
  1365. char *colon;
  1366. if (net_boot_file_name[0] == '\0')
  1367. return 0;
  1368. colon = strchr(net_boot_file_name, ':');
  1369. if (colon) {
  1370. if (ipaddr)
  1371. *ipaddr = string_to_ip(net_boot_file_name);
  1372. strncpy(filename, colon + 1, max_len);
  1373. } else {
  1374. strncpy(filename, net_boot_file_name, max_len);
  1375. }
  1376. filename[max_len - 1] = '\0';
  1377. return 1;
  1378. }
  1379. #if defined(CONFIG_CMD_NFS) || \
  1380. defined(CONFIG_CMD_SNTP) || \
  1381. defined(CONFIG_CMD_DNS)
  1382. /*
  1383. * make port a little random (1024-17407)
  1384. * This keeps the math somewhat trivial to compute, and seems to work with
  1385. * all supported protocols/clients/servers
  1386. */
  1387. unsigned int random_port(void)
  1388. {
  1389. return 1024 + (get_timer(0) % 0x4000);
  1390. }
  1391. #endif
  1392. void ip_to_string(struct in_addr x, char *s)
  1393. {
  1394. x.s_addr = ntohl(x.s_addr);
  1395. sprintf(s, "%d.%d.%d.%d",
  1396. (int) ((x.s_addr >> 24) & 0xff),
  1397. (int) ((x.s_addr >> 16) & 0xff),
  1398. (int) ((x.s_addr >> 8) & 0xff),
  1399. (int) ((x.s_addr >> 0) & 0xff)
  1400. );
  1401. }
  1402. void vlan_to_string(ushort x, char *s)
  1403. {
  1404. x = ntohs(x);
  1405. if (x == (ushort)-1)
  1406. x = VLAN_NONE;
  1407. if (x == VLAN_NONE)
  1408. strcpy(s, "none");
  1409. else
  1410. sprintf(s, "%d", x & VLAN_IDMASK);
  1411. }
  1412. ushort string_to_vlan(const char *s)
  1413. {
  1414. ushort id;
  1415. if (s == NULL)
  1416. return htons(VLAN_NONE);
  1417. if (*s < '0' || *s > '9')
  1418. id = VLAN_NONE;
  1419. else
  1420. id = (ushort)simple_strtoul(s, NULL, 10);
  1421. return htons(id);
  1422. }
  1423. ushort env_get_vlan(char *var)
  1424. {
  1425. return string_to_vlan(env_get(var));
  1426. }