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 /* 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 * 27 * LINK_LOCAL: 28 * 29 * Prerequisites: - own ethernet address 30 * We want: - own IP address 31 * Next step: ARP 32 * 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 * 50 * Prerequisites: - own ethernet address 51 * We want: - IP, Netmask, ServerIP, Gateway IP 52 * - bootfilename, lease time 53 * Next step: - TFTP 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 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 74 * 75 * SNTP: 76 * 77 * Prerequisites: - own ethernet address 78 * - own IP address 79 * We want: - network time 80 * Next step: none 81 * 82 * WOL: 83 * 84 * Prerequisites: - own ethernet address 85 * We want: - magic packet or timeout 86 * Next step: none 87 */ 88 89 90 #include <common.h> 91 #include <command.h> 92 #include <console.h> 93 #include <environment.h> 94 #include <errno.h> 95 #include <net.h> 96 #include <net/fastboot.h> 97 #include <net/tftp.h> 98 #if defined(CONFIG_LED_STATUS) 99 #include <miiphy.h> 100 #include <status_led.h> 101 #endif 102 #include <watchdog.h> 103 #include <linux/compiler.h> 104 #include "arp.h" 105 #include "bootp.h" 106 #include "cdp.h" 107 #if defined(CONFIG_CMD_DNS) 108 #include "dns.h" 109 #endif 110 #include "link_local.h" 111 #include "nfs.h" 112 #include "ping.h" 113 #include "rarp.h" 114 #if defined(CONFIG_CMD_SNTP) 115 #include "sntp.h" 116 #endif 117 #if defined(CONFIG_CMD_WOL) 118 #include "wol.h" 119 #endif 120 121 /** BOOTP EXTENTIONS **/ 122 123 /* Our subnet mask (0=unknown) */ 124 struct in_addr net_netmask; 125 /* Our gateways IP address */ 126 struct in_addr net_gateway; 127 /* Our DNS IP address */ 128 struct in_addr net_dns_server; 129 #if defined(CONFIG_BOOTP_DNS2) 130 /* Our 2nd DNS IP address */ 131 struct in_addr net_dns_server2; 132 #endif 133 134 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 135 struct in_addr net_mcast_addr; 136 #endif 137 138 /** END OF BOOTP EXTENTIONS **/ 139 140 /* Our ethernet address */ 141 u8 net_ethaddr[6]; 142 /* Boot server enet address */ 143 u8 net_server_ethaddr[6]; 144 /* Our IP addr (0 = unknown) */ 145 struct in_addr net_ip; 146 /* Server IP addr (0 = unknown) */ 147 struct in_addr net_server_ip; 148 /* Current receive packet */ 149 uchar *net_rx_packet; 150 /* Current rx packet length */ 151 int net_rx_packet_len; 152 /* IP packet ID */ 153 static unsigned net_ip_id; 154 /* Ethernet bcast address */ 155 const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 156 const u8 net_null_ethaddr[6]; 157 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER) 158 void (*push_packet)(void *, int len) = 0; 159 #endif 160 /* Network loop state */ 161 enum net_loop_state net_state; 162 /* Tried all network devices */ 163 int net_restart_wrap; 164 /* Network loop restarted */ 165 static int net_restarted; 166 /* At least one device configured */ 167 static int net_dev_exists; 168 169 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 170 /* default is without VLAN */ 171 ushort net_our_vlan = 0xFFFF; 172 /* ditto */ 173 ushort net_native_vlan = 0xFFFF; 174 175 /* Boot File name */ 176 char net_boot_file_name[1024]; 177 /* Indicates whether the file name was specified on the command line */ 178 bool net_boot_file_name_explicit; 179 /* The actual transferred size of the bootfile (in bytes) */ 180 u32 net_boot_file_size; 181 /* Boot file size in blocks as reported by the DHCP server */ 182 u32 net_boot_file_expected_size_in_blocks; 183 184 #if defined(CONFIG_CMD_SNTP) 185 /* NTP server IP address */ 186 struct in_addr net_ntp_server; 187 /* offset time from UTC */ 188 int net_ntp_time_offset; 189 #endif 190 191 static uchar net_pkt_buf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 192 /* Receive packets */ 193 uchar *net_rx_packets[PKTBUFSRX]; 194 /* Current UDP RX packet handler */ 195 static rxhand_f *udp_packet_handler; 196 /* Current ARP RX packet handler */ 197 static rxhand_f *arp_packet_handler; 198 #ifdef CONFIG_CMD_TFTPPUT 199 /* Current ICMP rx handler */ 200 static rxhand_icmp_f *packet_icmp_handler; 201 #endif 202 /* Current timeout handler */ 203 static thand_f *time_handler; 204 /* Time base value */ 205 static ulong time_start; 206 /* Current timeout value */ 207 static ulong time_delta; 208 /* THE transmit packet */ 209 uchar *net_tx_packet; 210 211 static int net_check_prereq(enum proto_t protocol); 212 213 static int net_try_count; 214 215 int __maybe_unused net_busy_flag; 216 217 /**********************************************************************/ 218 219 static int on_bootfile(const char *name, const char *value, enum env_op op, 220 int flags) 221 { 222 if (flags & H_PROGRAMMATIC) 223 return 0; 224 225 switch (op) { 226 case env_op_create: 227 case env_op_overwrite: 228 copy_filename(net_boot_file_name, value, 229 sizeof(net_boot_file_name)); 230 break; 231 default: 232 break; 233 } 234 235 return 0; 236 } 237 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile); 238 239 static int on_ipaddr(const char *name, const char *value, enum env_op op, 240 int flags) 241 { 242 if (flags & H_PROGRAMMATIC) 243 return 0; 244 245 net_ip = string_to_ip(value); 246 247 return 0; 248 } 249 U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr); 250 251 static int on_gatewayip(const char *name, const char *value, enum env_op op, 252 int flags) 253 { 254 if (flags & H_PROGRAMMATIC) 255 return 0; 256 257 net_gateway = string_to_ip(value); 258 259 return 0; 260 } 261 U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip); 262 263 static int on_netmask(const char *name, const char *value, enum env_op op, 264 int flags) 265 { 266 if (flags & H_PROGRAMMATIC) 267 return 0; 268 269 net_netmask = string_to_ip(value); 270 271 return 0; 272 } 273 U_BOOT_ENV_CALLBACK(netmask, on_netmask); 274 275 static int on_serverip(const char *name, const char *value, enum env_op op, 276 int flags) 277 { 278 if (flags & H_PROGRAMMATIC) 279 return 0; 280 281 net_server_ip = string_to_ip(value); 282 283 return 0; 284 } 285 U_BOOT_ENV_CALLBACK(serverip, on_serverip); 286 287 static int on_nvlan(const char *name, const char *value, enum env_op op, 288 int flags) 289 { 290 if (flags & H_PROGRAMMATIC) 291 return 0; 292 293 net_native_vlan = string_to_vlan(value); 294 295 return 0; 296 } 297 U_BOOT_ENV_CALLBACK(nvlan, on_nvlan); 298 299 static int on_vlan(const char *name, const char *value, enum env_op op, 300 int flags) 301 { 302 if (flags & H_PROGRAMMATIC) 303 return 0; 304 305 net_our_vlan = string_to_vlan(value); 306 307 return 0; 308 } 309 U_BOOT_ENV_CALLBACK(vlan, on_vlan); 310 311 #if defined(CONFIG_CMD_DNS) 312 static int on_dnsip(const char *name, const char *value, enum env_op op, 313 int flags) 314 { 315 if (flags & H_PROGRAMMATIC) 316 return 0; 317 318 net_dns_server = string_to_ip(value); 319 320 return 0; 321 } 322 U_BOOT_ENV_CALLBACK(dnsip, on_dnsip); 323 #endif 324 325 /* 326 * Check if autoload is enabled. If so, use either NFS or TFTP to download 327 * the boot file. 328 */ 329 void net_auto_load(void) 330 { 331 #if defined(CONFIG_CMD_NFS) 332 const char *s = env_get("autoload"); 333 334 if (s != NULL && strcmp(s, "NFS") == 0) { 335 if (net_check_prereq(NFS)) { 336 /* We aren't expecting to get a serverip, so just accept the assigned IP */ 337 #ifdef CONFIG_BOOTP_SERVERIP 338 net_set_state(NETLOOP_SUCCESS); 339 #else 340 printf("Cannot autoload with NFS\n"); 341 net_set_state(NETLOOP_FAIL); 342 #endif 343 return; 344 } 345 /* 346 * Use NFS to load the bootfile. 347 */ 348 nfs_start(); 349 return; 350 } 351 #endif 352 if (env_get_yesno("autoload") == 0) { 353 /* 354 * Just use BOOTP/RARP to configure system; 355 * Do not use TFTP to load the bootfile. 356 */ 357 net_set_state(NETLOOP_SUCCESS); 358 return; 359 } 360 if (net_check_prereq(TFTPGET)) { 361 /* We aren't expecting to get a serverip, so just accept the assigned IP */ 362 #ifdef CONFIG_BOOTP_SERVERIP 363 net_set_state(NETLOOP_SUCCESS); 364 #else 365 printf("Cannot autoload with TFTPGET\n"); 366 net_set_state(NETLOOP_FAIL); 367 #endif 368 return; 369 } 370 tftp_start(TFTPGET); 371 } 372 373 static void net_init_loop(void) 374 { 375 if (eth_get_dev()) 376 memcpy(net_ethaddr, eth_get_ethaddr(), 6); 377 378 return; 379 } 380 381 static void net_clear_handlers(void) 382 { 383 net_set_udp_handler(NULL); 384 net_set_arp_handler(NULL); 385 net_set_timeout_handler(0, NULL); 386 } 387 388 static void net_cleanup_loop(void) 389 { 390 net_clear_handlers(); 391 } 392 393 void net_init(void) 394 { 395 static int first_call = 1; 396 397 if (first_call) { 398 /* 399 * Setup packet buffers, aligned correctly. 400 */ 401 int i; 402 403 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1); 404 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN; 405 for (i = 0; i < PKTBUFSRX; i++) { 406 net_rx_packets[i] = net_tx_packet + 407 (i + 1) * PKTSIZE_ALIGN; 408 } 409 arp_init(); 410 net_clear_handlers(); 411 412 /* Only need to setup buffer pointers once. */ 413 first_call = 0; 414 } 415 416 net_init_loop(); 417 } 418 419 /**********************************************************************/ 420 /* 421 * Main network processing loop. 422 */ 423 424 int net_loop(enum proto_t protocol) 425 { 426 int ret = -EINVAL; 427 enum net_loop_state prev_net_state = net_state; 428 429 net_restarted = 0; 430 net_dev_exists = 0; 431 net_try_count = 1; 432 debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n"); 433 434 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start"); 435 net_init(); 436 if (eth_is_on_demand_init() || protocol != NETCONS) { 437 eth_halt(); 438 eth_set_current(); 439 ret = eth_init(); 440 if (ret < 0) { 441 eth_halt(); 442 return ret; 443 } 444 } else { 445 eth_init_state_only(); 446 } 447 restart: 448 #ifdef CONFIG_USB_KEYBOARD 449 net_busy_flag = 0; 450 #endif 451 net_set_state(NETLOOP_CONTINUE); 452 453 /* 454 * Start the ball rolling with the given start function. From 455 * here on, this code is a state machine driven by received 456 * packets and timer events. 457 */ 458 debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n"); 459 net_init_loop(); 460 461 switch (net_check_prereq(protocol)) { 462 case 1: 463 /* network not configured */ 464 eth_halt(); 465 net_set_state(prev_net_state); 466 return -ENODEV; 467 468 case 2: 469 /* network device not configured */ 470 break; 471 472 case 0: 473 net_dev_exists = 1; 474 net_boot_file_size = 0; 475 switch (protocol) { 476 case TFTPGET: 477 #ifdef CONFIG_CMD_TFTPPUT 478 case TFTPPUT: 479 #endif 480 /* always use ARP to get server ethernet address */ 481 tftp_start(protocol); 482 break; 483 #ifdef CONFIG_CMD_TFTPSRV 484 case TFTPSRV: 485 tftp_start_server(); 486 break; 487 #endif 488 #ifdef CONFIG_UDP_FUNCTION_FASTBOOT 489 case FASTBOOT: 490 fastboot_start_server(); 491 break; 492 #endif 493 #if defined(CONFIG_CMD_DHCP) 494 case DHCP: 495 bootp_reset(); 496 net_ip.s_addr = 0; 497 dhcp_request(); /* Basically same as BOOTP */ 498 break; 499 #endif 500 501 case BOOTP: 502 bootp_reset(); 503 net_ip.s_addr = 0; 504 bootp_request(); 505 break; 506 507 #if defined(CONFIG_CMD_RARP) 508 case RARP: 509 rarp_try = 0; 510 net_ip.s_addr = 0; 511 rarp_request(); 512 break; 513 #endif 514 #if defined(CONFIG_CMD_PING) 515 case PING: 516 ping_start(); 517 break; 518 #endif 519 #if defined(CONFIG_CMD_NFS) 520 case NFS: 521 nfs_start(); 522 break; 523 #endif 524 #if defined(CONFIG_CMD_CDP) 525 case CDP: 526 cdp_start(); 527 break; 528 #endif 529 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD) 530 case NETCONS: 531 nc_start(); 532 break; 533 #endif 534 #if defined(CONFIG_CMD_SNTP) 535 case SNTP: 536 sntp_start(); 537 break; 538 #endif 539 #if defined(CONFIG_CMD_DNS) 540 case DNS: 541 dns_start(); 542 break; 543 #endif 544 #if defined(CONFIG_CMD_LINK_LOCAL) 545 case LINKLOCAL: 546 link_local_start(); 547 break; 548 #endif 549 #if defined(CONFIG_CMD_WOL) 550 case WOL: 551 wol_start(); 552 break; 553 #endif 554 default: 555 break; 556 } 557 558 break; 559 } 560 561 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 562 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 563 defined(CONFIG_LED_STATUS) && \ 564 defined(CONFIG_LED_STATUS_RED) 565 /* 566 * Echo the inverted link state to the fault LED. 567 */ 568 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) 569 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF); 570 else 571 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON); 572 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 573 #endif /* CONFIG_MII, ... */ 574 #ifdef CONFIG_USB_KEYBOARD 575 net_busy_flag = 1; 576 #endif 577 578 /* 579 * Main packet reception loop. Loop receiving packets until 580 * someone sets `net_state' to a state that terminates. 581 */ 582 for (;;) { 583 WATCHDOG_RESET(); 584 #ifdef CONFIG_SHOW_ACTIVITY 585 show_activity(1); 586 #endif 587 if (arp_timeout_check() > 0) 588 time_start = get_timer(0); 589 590 /* 591 * Check the ethernet for a new packet. The ethernet 592 * receive routine will process it. 593 * Most drivers return the most recent packet size, but not 594 * errors that may have happened. 595 */ 596 eth_rx(); 597 598 /* 599 * Abort if ctrl-c was pressed. 600 */ 601 if (ctrlc()) { 602 /* cancel any ARP that may not have completed */ 603 net_arp_wait_packet_ip.s_addr = 0; 604 605 net_cleanup_loop(); 606 eth_halt(); 607 /* Invalidate the last protocol */ 608 eth_set_last_protocol(BOOTP); 609 610 puts("\nAbort\n"); 611 /* include a debug print as well incase the debug 612 messages are directed to stderr */ 613 debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n"); 614 ret = -EINTR; 615 goto done; 616 } 617 618 /* 619 * Check for a timeout, and run the timeout handler 620 * if we have one. 621 */ 622 if (time_handler && 623 ((get_timer(0) - time_start) > time_delta)) { 624 thand_f *x; 625 626 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 627 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 628 defined(CONFIG_LED_STATUS) && \ 629 defined(CONFIG_LED_STATUS_RED) 630 /* 631 * Echo the inverted link state to the fault LED. 632 */ 633 if (miiphy_link(eth_get_dev()->name, 634 CONFIG_SYS_FAULT_MII_ADDR)) 635 status_led_set(CONFIG_LED_STATUS_RED, 636 CONFIG_LED_STATUS_OFF); 637 else 638 status_led_set(CONFIG_LED_STATUS_RED, 639 CONFIG_LED_STATUS_ON); 640 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 641 #endif /* CONFIG_MII, ... */ 642 debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n"); 643 x = time_handler; 644 time_handler = (thand_f *)0; 645 (*x)(); 646 } 647 648 if (net_state == NETLOOP_FAIL) 649 ret = net_start_again(); 650 651 switch (net_state) { 652 case NETLOOP_RESTART: 653 net_restarted = 1; 654 goto restart; 655 656 case NETLOOP_SUCCESS: 657 net_cleanup_loop(); 658 if (net_boot_file_size > 0) { 659 printf("Bytes transferred = %d (%x hex)\n", 660 net_boot_file_size, net_boot_file_size); 661 env_set_hex("filesize", net_boot_file_size); 662 env_set_hex("fileaddr", load_addr); 663 } 664 if (protocol != NETCONS) 665 eth_halt(); 666 else 667 eth_halt_state_only(); 668 669 eth_set_last_protocol(protocol); 670 671 ret = net_boot_file_size; 672 debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n"); 673 goto done; 674 675 case NETLOOP_FAIL: 676 net_cleanup_loop(); 677 /* Invalidate the last protocol */ 678 eth_set_last_protocol(BOOTP); 679 debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n"); 680 goto done; 681 682 case NETLOOP_CONTINUE: 683 continue; 684 } 685 } 686 687 done: 688 #ifdef CONFIG_USB_KEYBOARD 689 net_busy_flag = 0; 690 #endif 691 #ifdef CONFIG_CMD_TFTPPUT 692 /* Clear out the handlers */ 693 net_set_udp_handler(NULL); 694 net_set_icmp_handler(NULL); 695 #endif 696 net_set_state(prev_net_state); 697 return ret; 698 } 699 700 /**********************************************************************/ 701 702 static void start_again_timeout_handler(void) 703 { 704 net_set_state(NETLOOP_RESTART); 705 } 706 707 int net_start_again(void) 708 { 709 char *nretry; 710 int retry_forever = 0; 711 unsigned long retrycnt = 0; 712 int ret; 713 714 nretry = env_get("netretry"); 715 if (nretry) { 716 if (!strcmp(nretry, "yes")) 717 retry_forever = 1; 718 else if (!strcmp(nretry, "no")) 719 retrycnt = 0; 720 else if (!strcmp(nretry, "once")) 721 retrycnt = 1; 722 else 723 retrycnt = simple_strtoul(nretry, NULL, 0); 724 } else { 725 retrycnt = 0; 726 retry_forever = 0; 727 } 728 729 if ((!retry_forever) && (net_try_count > retrycnt)) { 730 eth_halt(); 731 net_set_state(NETLOOP_FAIL); 732 /* 733 * We don't provide a way for the protocol to return an error, 734 * but this is almost always the reason. 735 */ 736 return -ETIMEDOUT; 737 } 738 739 net_try_count++; 740 741 eth_halt(); 742 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 743 eth_try_another(!net_restarted); 744 #endif 745 ret = eth_init(); 746 if (net_restart_wrap) { 747 net_restart_wrap = 0; 748 if (net_dev_exists) { 749 net_set_timeout_handler(10000UL, 750 start_again_timeout_handler); 751 net_set_udp_handler(NULL); 752 } else { 753 net_set_state(NETLOOP_FAIL); 754 } 755 } else { 756 net_set_state(NETLOOP_RESTART); 757 } 758 return ret; 759 } 760 761 /**********************************************************************/ 762 /* 763 * Miscelaneous bits. 764 */ 765 766 static void dummy_handler(uchar *pkt, unsigned dport, 767 struct in_addr sip, unsigned sport, 768 unsigned len) 769 { 770 } 771 772 rxhand_f *net_get_udp_handler(void) 773 { 774 return udp_packet_handler; 775 } 776 777 void net_set_udp_handler(rxhand_f *f) 778 { 779 debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f); 780 if (f == NULL) 781 udp_packet_handler = dummy_handler; 782 else 783 udp_packet_handler = f; 784 } 785 786 rxhand_f *net_get_arp_handler(void) 787 { 788 return arp_packet_handler; 789 } 790 791 void net_set_arp_handler(rxhand_f *f) 792 { 793 debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f); 794 if (f == NULL) 795 arp_packet_handler = dummy_handler; 796 else 797 arp_packet_handler = f; 798 } 799 800 #ifdef CONFIG_CMD_TFTPPUT 801 void net_set_icmp_handler(rxhand_icmp_f *f) 802 { 803 packet_icmp_handler = f; 804 } 805 #endif 806 807 void net_set_timeout_handler(ulong iv, thand_f *f) 808 { 809 if (iv == 0) { 810 debug_cond(DEBUG_INT_STATE, 811 "--- net_loop timeout handler cancelled\n"); 812 time_handler = (thand_f *)0; 813 } else { 814 debug_cond(DEBUG_INT_STATE, 815 "--- net_loop timeout handler set (%p)\n", f); 816 time_handler = f; 817 time_start = get_timer(0); 818 time_delta = iv * CONFIG_SYS_HZ / 1000; 819 } 820 } 821 822 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport, 823 int payload_len) 824 { 825 uchar *pkt; 826 int eth_hdr_size; 827 int pkt_hdr_size; 828 829 /* make sure the net_tx_packet is initialized (net_init() was called) */ 830 assert(net_tx_packet != NULL); 831 if (net_tx_packet == NULL) 832 return -1; 833 834 /* convert to new style broadcast */ 835 if (dest.s_addr == 0) 836 dest.s_addr = 0xFFFFFFFF; 837 838 /* if broadcast, make the ether address a broadcast and don't do ARP */ 839 if (dest.s_addr == 0xFFFFFFFF) 840 ether = (uchar *)net_bcast_ethaddr; 841 842 pkt = (uchar *)net_tx_packet; 843 844 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP); 845 pkt += eth_hdr_size; 846 net_set_udp_header(pkt, dest, dport, sport, payload_len); 847 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE; 848 849 /* if MAC address was not discovered yet, do an ARP request */ 850 if (memcmp(ether, net_null_ethaddr, 6) == 0) { 851 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest); 852 853 /* save the ip and eth addr for the packet to send after arp */ 854 net_arp_wait_packet_ip = dest; 855 arp_wait_packet_ethaddr = ether; 856 857 /* size of the waiting packet */ 858 arp_wait_tx_packet_size = pkt_hdr_size + payload_len; 859 860 /* and do the ARP request */ 861 arp_wait_try = 1; 862 arp_wait_timer_start = get_timer(0); 863 arp_request(); 864 return 1; /* waiting */ 865 } else { 866 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n", 867 &dest, ether); 868 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len); 869 return 0; /* transmitted */ 870 } 871 } 872 873 #ifdef CONFIG_IP_DEFRAG 874 /* 875 * This function collects fragments in a single packet, according 876 * to the algorithm in RFC815. It returns NULL or the pointer to 877 * a complete packet, in static storage 878 */ 879 #ifndef CONFIG_NET_MAXDEFRAG 880 #define CONFIG_NET_MAXDEFRAG 16384 881 #endif 882 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG) 883 884 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE) 885 886 /* 887 * this is the packet being assembled, either data or frag control. 888 * Fragments go by 8 bytes, so this union must be 8 bytes long 889 */ 890 struct hole { 891 /* first_byte is address of this structure */ 892 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ 893 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ 894 u16 prev_hole; /* index of prev, 0 == none */ 895 u16 unused; 896 }; 897 898 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp) 899 { 900 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN); 901 static u16 first_hole, total_len; 902 struct hole *payload, *thisfrag, *h, *newh; 903 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff; 904 uchar *indata = (uchar *)ip; 905 int offset8, start, len, done = 0; 906 u16 ip_off = ntohs(ip->ip_off); 907 908 /* payload starts after IP header, this fragment is in there */ 909 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE); 910 offset8 = (ip_off & IP_OFFS); 911 thisfrag = payload + offset8; 912 start = offset8 * 8; 913 len = ntohs(ip->ip_len) - IP_HDR_SIZE; 914 915 if (start + len > IP_MAXUDP) /* fragment extends too far */ 916 return NULL; 917 918 if (!total_len || localip->ip_id != ip->ip_id) { 919 /* new (or different) packet, reset structs */ 920 total_len = 0xffff; 921 payload[0].last_byte = ~0; 922 payload[0].next_hole = 0; 923 payload[0].prev_hole = 0; 924 first_hole = 0; 925 /* any IP header will work, copy the first we received */ 926 memcpy(localip, ip, IP_HDR_SIZE); 927 } 928 929 /* 930 * What follows is the reassembly algorithm. We use the payload 931 * array as a linked list of hole descriptors, as each hole starts 932 * at a multiple of 8 bytes. However, last byte can be whatever value, 933 * so it is represented as byte count, not as 8-byte blocks. 934 */ 935 936 h = payload + first_hole; 937 while (h->last_byte < start) { 938 if (!h->next_hole) { 939 /* no hole that far away */ 940 return NULL; 941 } 942 h = payload + h->next_hole; 943 } 944 945 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ 946 if (offset8 + ((len + 7) / 8) <= h - payload) { 947 /* no overlap with holes (dup fragment?) */ 948 return NULL; 949 } 950 951 if (!(ip_off & IP_FLAGS_MFRAG)) { 952 /* no more fragmentss: truncate this (last) hole */ 953 total_len = start + len; 954 h->last_byte = start + len; 955 } 956 957 /* 958 * There is some overlap: fix the hole list. This code doesn't 959 * deal with a fragment that overlaps with two different holes 960 * (thus being a superset of a previously-received fragment). 961 */ 962 963 if ((h >= thisfrag) && (h->last_byte <= start + len)) { 964 /* complete overlap with hole: remove hole */ 965 if (!h->prev_hole && !h->next_hole) { 966 /* last remaining hole */ 967 done = 1; 968 } else if (!h->prev_hole) { 969 /* first hole */ 970 first_hole = h->next_hole; 971 payload[h->next_hole].prev_hole = 0; 972 } else if (!h->next_hole) { 973 /* last hole */ 974 payload[h->prev_hole].next_hole = 0; 975 } else { 976 /* in the middle of the list */ 977 payload[h->next_hole].prev_hole = h->prev_hole; 978 payload[h->prev_hole].next_hole = h->next_hole; 979 } 980 981 } else if (h->last_byte <= start + len) { 982 /* overlaps with final part of the hole: shorten this hole */ 983 h->last_byte = start; 984 985 } else if (h >= thisfrag) { 986 /* overlaps with initial part of the hole: move this hole */ 987 newh = thisfrag + (len / 8); 988 *newh = *h; 989 h = newh; 990 if (h->next_hole) 991 payload[h->next_hole].prev_hole = (h - payload); 992 if (h->prev_hole) 993 payload[h->prev_hole].next_hole = (h - payload); 994 else 995 first_hole = (h - payload); 996 997 } else { 998 /* fragment sits in the middle: split the hole */ 999 newh = thisfrag + (len / 8); 1000 *newh = *h; 1001 h->last_byte = start; 1002 h->next_hole = (newh - payload); 1003 newh->prev_hole = (h - payload); 1004 if (newh->next_hole) 1005 payload[newh->next_hole].prev_hole = (newh - payload); 1006 } 1007 1008 /* finally copy this fragment and possibly return whole packet */ 1009 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len); 1010 if (!done) 1011 return NULL; 1012 1013 localip->ip_len = htons(total_len); 1014 *lenp = total_len + IP_HDR_SIZE; 1015 return localip; 1016 } 1017 1018 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip, 1019 int *lenp) 1020 { 1021 u16 ip_off = ntohs(ip->ip_off); 1022 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1023 return ip; /* not a fragment */ 1024 return __net_defragment(ip, lenp); 1025 } 1026 1027 #else /* !CONFIG_IP_DEFRAG */ 1028 1029 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip, 1030 int *lenp) 1031 { 1032 u16 ip_off = ntohs(ip->ip_off); 1033 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 1034 return ip; /* not a fragment */ 1035 return NULL; 1036 } 1037 #endif 1038 1039 /** 1040 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently 1041 * drop others. 1042 * 1043 * @parma ip IP packet containing the ICMP 1044 */ 1045 static void receive_icmp(struct ip_udp_hdr *ip, int len, 1046 struct in_addr src_ip, struct ethernet_hdr *et) 1047 { 1048 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src; 1049 1050 switch (icmph->type) { 1051 case ICMP_REDIRECT: 1052 if (icmph->code != ICMP_REDIR_HOST) 1053 return; 1054 printf(" ICMP Host Redirect to %pI4 ", 1055 &icmph->un.gateway); 1056 break; 1057 default: 1058 #if defined(CONFIG_CMD_PING) 1059 ping_receive(et, ip, len); 1060 #endif 1061 #ifdef CONFIG_CMD_TFTPPUT 1062 if (packet_icmp_handler) 1063 packet_icmp_handler(icmph->type, icmph->code, 1064 ntohs(ip->udp_dst), src_ip, 1065 ntohs(ip->udp_src), icmph->un.data, 1066 ntohs(ip->udp_len)); 1067 #endif 1068 break; 1069 } 1070 } 1071 1072 void net_process_received_packet(uchar *in_packet, int len) 1073 { 1074 struct ethernet_hdr *et; 1075 struct ip_udp_hdr *ip; 1076 struct in_addr dst_ip; 1077 struct in_addr src_ip; 1078 int eth_proto; 1079 #if defined(CONFIG_CMD_CDP) 1080 int iscdp; 1081 #endif 1082 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 1083 1084 debug_cond(DEBUG_NET_PKT, "packet received\n"); 1085 1086 net_rx_packet = in_packet; 1087 net_rx_packet_len = len; 1088 et = (struct ethernet_hdr *)in_packet; 1089 1090 /* too small packet? */ 1091 if (len < ETHER_HDR_SIZE) 1092 return; 1093 1094 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER) 1095 if (push_packet) { 1096 (*push_packet)(in_packet, len); 1097 return; 1098 } 1099 #endif 1100 1101 #if defined(CONFIG_CMD_CDP) 1102 /* keep track if packet is CDP */ 1103 iscdp = is_cdp_packet(et->et_dest); 1104 #endif 1105 1106 myvlanid = ntohs(net_our_vlan); 1107 if (myvlanid == (ushort)-1) 1108 myvlanid = VLAN_NONE; 1109 mynvlanid = ntohs(net_native_vlan); 1110 if (mynvlanid == (ushort)-1) 1111 mynvlanid = VLAN_NONE; 1112 1113 eth_proto = ntohs(et->et_protlen); 1114 1115 if (eth_proto < 1514) { 1116 struct e802_hdr *et802 = (struct e802_hdr *)et; 1117 /* 1118 * Got a 802.2 packet. Check the other protocol field. 1119 * XXX VLAN over 802.2+SNAP not implemented! 1120 */ 1121 eth_proto = ntohs(et802->et_prot); 1122 1123 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE); 1124 len -= E802_HDR_SIZE; 1125 1126 } else if (eth_proto != PROT_VLAN) { /* normal packet */ 1127 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE); 1128 len -= ETHER_HDR_SIZE; 1129 1130 } else { /* VLAN packet */ 1131 struct vlan_ethernet_hdr *vet = 1132 (struct vlan_ethernet_hdr *)et; 1133 1134 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n"); 1135 1136 /* too small packet? */ 1137 if (len < VLAN_ETHER_HDR_SIZE) 1138 return; 1139 1140 /* if no VLAN active */ 1141 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE 1142 #if defined(CONFIG_CMD_CDP) 1143 && iscdp == 0 1144 #endif 1145 ) 1146 return; 1147 1148 cti = ntohs(vet->vet_tag); 1149 vlanid = cti & VLAN_IDMASK; 1150 eth_proto = ntohs(vet->vet_type); 1151 1152 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE); 1153 len -= VLAN_ETHER_HDR_SIZE; 1154 } 1155 1156 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto); 1157 1158 #if defined(CONFIG_CMD_CDP) 1159 if (iscdp) { 1160 cdp_receive((uchar *)ip, len); 1161 return; 1162 } 1163 #endif 1164 1165 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1166 if (vlanid == VLAN_NONE) 1167 vlanid = (mynvlanid & VLAN_IDMASK); 1168 /* not matched? */ 1169 if (vlanid != (myvlanid & VLAN_IDMASK)) 1170 return; 1171 } 1172 1173 switch (eth_proto) { 1174 case PROT_ARP: 1175 arp_receive(et, ip, len); 1176 break; 1177 1178 #ifdef CONFIG_CMD_RARP 1179 case PROT_RARP: 1180 rarp_receive(ip, len); 1181 break; 1182 #endif 1183 case PROT_IP: 1184 debug_cond(DEBUG_NET_PKT, "Got IP\n"); 1185 /* Before we start poking the header, make sure it is there */ 1186 if (len < IP_UDP_HDR_SIZE) { 1187 debug("len bad %d < %lu\n", len, 1188 (ulong)IP_UDP_HDR_SIZE); 1189 return; 1190 } 1191 /* Check the packet length */ 1192 if (len < ntohs(ip->ip_len)) { 1193 debug("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1194 return; 1195 } 1196 len = ntohs(ip->ip_len); 1197 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n", 1198 len, ip->ip_hl_v & 0xff); 1199 1200 /* Can't deal with anything except IPv4 */ 1201 if ((ip->ip_hl_v & 0xf0) != 0x40) 1202 return; 1203 /* Can't deal with IP options (headers != 20 bytes) */ 1204 if ((ip->ip_hl_v & 0x0f) > 0x05) 1205 return; 1206 /* Check the Checksum of the header */ 1207 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) { 1208 debug("checksum bad\n"); 1209 return; 1210 } 1211 /* If it is not for us, ignore it */ 1212 dst_ip = net_read_ip(&ip->ip_dst); 1213 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr && 1214 dst_ip.s_addr != 0xFFFFFFFF) { 1215 #ifdef CONFIG_MCAST_TFTP 1216 if (net_mcast_addr != dst_ip) 1217 #endif 1218 return; 1219 } 1220 /* Read source IP address for later use */ 1221 src_ip = net_read_ip(&ip->ip_src); 1222 /* 1223 * The function returns the unchanged packet if it's not 1224 * a fragment, and either the complete packet or NULL if 1225 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) 1226 */ 1227 ip = net_defragment(ip, &len); 1228 if (!ip) 1229 return; 1230 /* 1231 * watch for ICMP host redirects 1232 * 1233 * There is no real handler code (yet). We just watch 1234 * for ICMP host redirect messages. In case anybody 1235 * sees these messages: please contact me 1236 * (wd@denx.de), or - even better - send me the 1237 * necessary fixes :-) 1238 * 1239 * Note: in all cases where I have seen this so far 1240 * it was a problem with the router configuration, 1241 * for instance when a router was configured in the 1242 * BOOTP reply, but the TFTP server was on the same 1243 * subnet. So this is probably a warning that your 1244 * configuration might be wrong. But I'm not really 1245 * sure if there aren't any other situations. 1246 * 1247 * Simon Glass <sjg@chromium.org>: We get an ICMP when 1248 * we send a tftp packet to a dead connection, or when 1249 * there is no server at the other end. 1250 */ 1251 if (ip->ip_p == IPPROTO_ICMP) { 1252 receive_icmp(ip, len, src_ip, et); 1253 return; 1254 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1255 return; 1256 } 1257 1258 debug_cond(DEBUG_DEV_PKT, 1259 "received UDP (to=%pI4, from=%pI4, len=%d)\n", 1260 &dst_ip, &src_ip, len); 1261 1262 #ifdef CONFIG_UDP_CHECKSUM 1263 if (ip->udp_xsum != 0) { 1264 ulong xsum; 1265 ushort *sumptr; 1266 ushort sumlen; 1267 1268 xsum = ip->ip_p; 1269 xsum += (ntohs(ip->udp_len)); 1270 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff; 1271 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff; 1272 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff; 1273 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff; 1274 1275 sumlen = ntohs(ip->udp_len); 1276 sumptr = (ushort *)&(ip->udp_src); 1277 1278 while (sumlen > 1) { 1279 ushort sumdata; 1280 1281 sumdata = *sumptr++; 1282 xsum += ntohs(sumdata); 1283 sumlen -= 2; 1284 } 1285 if (sumlen > 0) { 1286 ushort sumdata; 1287 1288 sumdata = *(unsigned char *)sumptr; 1289 sumdata = (sumdata << 8) & 0xff00; 1290 xsum += sumdata; 1291 } 1292 while ((xsum >> 16) != 0) { 1293 xsum = (xsum & 0x0000ffff) + 1294 ((xsum >> 16) & 0x0000ffff); 1295 } 1296 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1297 printf(" UDP wrong checksum %08lx %08x\n", 1298 xsum, ntohs(ip->udp_xsum)); 1299 return; 1300 } 1301 } 1302 #endif 1303 1304 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD) 1305 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE, 1306 src_ip, 1307 ntohs(ip->udp_dst), 1308 ntohs(ip->udp_src), 1309 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1310 #endif 1311 /* 1312 * IP header OK. Pass the packet to the current handler. 1313 */ 1314 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE, 1315 ntohs(ip->udp_dst), 1316 src_ip, 1317 ntohs(ip->udp_src), 1318 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1319 break; 1320 #ifdef CONFIG_CMD_WOL 1321 case PROT_WOL: 1322 wol_receive(ip, len); 1323 break; 1324 #endif 1325 } 1326 } 1327 1328 /**********************************************************************/ 1329 1330 static int net_check_prereq(enum proto_t protocol) 1331 { 1332 switch (protocol) { 1333 /* Fall through */ 1334 #if defined(CONFIG_CMD_PING) 1335 case PING: 1336 if (net_ping_ip.s_addr == 0) { 1337 puts("*** ERROR: ping address not given\n"); 1338 return 1; 1339 } 1340 goto common; 1341 #endif 1342 #if defined(CONFIG_CMD_SNTP) 1343 case SNTP: 1344 if (net_ntp_server.s_addr == 0) { 1345 puts("*** ERROR: NTP server address not given\n"); 1346 return 1; 1347 } 1348 goto common; 1349 #endif 1350 #if defined(CONFIG_CMD_DNS) 1351 case DNS: 1352 if (net_dns_server.s_addr == 0) { 1353 puts("*** ERROR: DNS server address not given\n"); 1354 return 1; 1355 } 1356 goto common; 1357 #endif 1358 #if defined(CONFIG_CMD_NFS) 1359 case NFS: 1360 #endif 1361 /* Fall through */ 1362 case TFTPGET: 1363 case TFTPPUT: 1364 if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) { 1365 puts("*** ERROR: `serverip' not set\n"); 1366 return 1; 1367 } 1368 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ 1369 defined(CONFIG_CMD_DNS) 1370 common: 1371 #endif 1372 /* Fall through */ 1373 1374 case NETCONS: 1375 case FASTBOOT: 1376 case TFTPSRV: 1377 if (net_ip.s_addr == 0) { 1378 puts("*** ERROR: `ipaddr' not set\n"); 1379 return 1; 1380 } 1381 /* Fall through */ 1382 1383 #ifdef CONFIG_CMD_RARP 1384 case RARP: 1385 #endif 1386 case BOOTP: 1387 case CDP: 1388 case DHCP: 1389 case LINKLOCAL: 1390 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) { 1391 int num = eth_get_dev_index(); 1392 1393 switch (num) { 1394 case -1: 1395 puts("*** ERROR: No ethernet found.\n"); 1396 return 1; 1397 case 0: 1398 puts("*** ERROR: `ethaddr' not set\n"); 1399 break; 1400 default: 1401 printf("*** ERROR: `eth%daddr' not set\n", 1402 num); 1403 break; 1404 } 1405 1406 net_start_again(); 1407 return 2; 1408 } 1409 /* Fall through */ 1410 default: 1411 return 0; 1412 } 1413 return 0; /* OK */ 1414 } 1415 /**********************************************************************/ 1416 1417 int 1418 net_eth_hdr_size(void) 1419 { 1420 ushort myvlanid; 1421 1422 myvlanid = ntohs(net_our_vlan); 1423 if (myvlanid == (ushort)-1) 1424 myvlanid = VLAN_NONE; 1425 1426 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : 1427 VLAN_ETHER_HDR_SIZE; 1428 } 1429 1430 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot) 1431 { 1432 struct ethernet_hdr *et = (struct ethernet_hdr *)xet; 1433 ushort myvlanid; 1434 1435 myvlanid = ntohs(net_our_vlan); 1436 if (myvlanid == (ushort)-1) 1437 myvlanid = VLAN_NONE; 1438 1439 memcpy(et->et_dest, dest_ethaddr, 6); 1440 memcpy(et->et_src, net_ethaddr, 6); 1441 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1442 et->et_protlen = htons(prot); 1443 return ETHER_HDR_SIZE; 1444 } else { 1445 struct vlan_ethernet_hdr *vet = 1446 (struct vlan_ethernet_hdr *)xet; 1447 1448 vet->vet_vlan_type = htons(PROT_VLAN); 1449 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1450 vet->vet_type = htons(prot); 1451 return VLAN_ETHER_HDR_SIZE; 1452 } 1453 } 1454 1455 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot) 1456 { 1457 ushort protlen; 1458 1459 memcpy(et->et_dest, addr, 6); 1460 memcpy(et->et_src, net_ethaddr, 6); 1461 protlen = ntohs(et->et_protlen); 1462 if (protlen == PROT_VLAN) { 1463 struct vlan_ethernet_hdr *vet = 1464 (struct vlan_ethernet_hdr *)et; 1465 vet->vet_type = htons(prot); 1466 return VLAN_ETHER_HDR_SIZE; 1467 } else if (protlen > 1514) { 1468 et->et_protlen = htons(prot); 1469 return ETHER_HDR_SIZE; 1470 } else { 1471 /* 802.2 + SNAP */ 1472 struct e802_hdr *et802 = (struct e802_hdr *)et; 1473 et802->et_prot = htons(prot); 1474 return E802_HDR_SIZE; 1475 } 1476 } 1477 1478 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source) 1479 { 1480 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1481 1482 /* 1483 * Construct an IP header. 1484 */ 1485 /* IP_HDR_SIZE / 4 (not including UDP) */ 1486 ip->ip_hl_v = 0x45; 1487 ip->ip_tos = 0; 1488 ip->ip_len = htons(IP_HDR_SIZE); 1489 ip->ip_id = htons(net_ip_id++); 1490 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1491 ip->ip_ttl = 255; 1492 ip->ip_sum = 0; 1493 /* already in network byte order */ 1494 net_copy_ip((void *)&ip->ip_src, &source); 1495 /* already in network byte order */ 1496 net_copy_ip((void *)&ip->ip_dst, &dest); 1497 } 1498 1499 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport, 1500 int len) 1501 { 1502 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1503 1504 /* 1505 * If the data is an odd number of bytes, zero the 1506 * byte after the last byte so that the checksum 1507 * will work. 1508 */ 1509 if (len & 1) 1510 pkt[IP_UDP_HDR_SIZE + len] = 0; 1511 1512 net_set_ip_header(pkt, dest, net_ip); 1513 ip->ip_len = htons(IP_UDP_HDR_SIZE + len); 1514 ip->ip_p = IPPROTO_UDP; 1515 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE); 1516 1517 ip->udp_src = htons(sport); 1518 ip->udp_dst = htons(dport); 1519 ip->udp_len = htons(UDP_HDR_SIZE + len); 1520 ip->udp_xsum = 0; 1521 } 1522 1523 void copy_filename(char *dst, const char *src, int size) 1524 { 1525 if (src && *src && (*src == '"')) { 1526 ++src; 1527 --size; 1528 } 1529 1530 while ((--size > 0) && src && *src && (*src != '"')) 1531 *dst++ = *src++; 1532 *dst = '\0'; 1533 } 1534 1535 int is_serverip_in_cmd(void) 1536 { 1537 return !!strchr(net_boot_file_name, ':'); 1538 } 1539 1540 #if defined(CONFIG_CMD_NFS) || \ 1541 defined(CONFIG_CMD_SNTP) || \ 1542 defined(CONFIG_CMD_DNS) 1543 /* 1544 * make port a little random (1024-17407) 1545 * This keeps the math somewhat trivial to compute, and seems to work with 1546 * all supported protocols/clients/servers 1547 */ 1548 unsigned int random_port(void) 1549 { 1550 return 1024 + (get_timer(0) % 0x4000); 1551 } 1552 #endif 1553 1554 void ip_to_string(struct in_addr x, char *s) 1555 { 1556 x.s_addr = ntohl(x.s_addr); 1557 sprintf(s, "%d.%d.%d.%d", 1558 (int) ((x.s_addr >> 24) & 0xff), 1559 (int) ((x.s_addr >> 16) & 0xff), 1560 (int) ((x.s_addr >> 8) & 0xff), 1561 (int) ((x.s_addr >> 0) & 0xff) 1562 ); 1563 } 1564 1565 void vlan_to_string(ushort x, char *s) 1566 { 1567 x = ntohs(x); 1568 1569 if (x == (ushort)-1) 1570 x = VLAN_NONE; 1571 1572 if (x == VLAN_NONE) 1573 strcpy(s, "none"); 1574 else 1575 sprintf(s, "%d", x & VLAN_IDMASK); 1576 } 1577 1578 ushort string_to_vlan(const char *s) 1579 { 1580 ushort id; 1581 1582 if (s == NULL) 1583 return htons(VLAN_NONE); 1584 1585 if (*s < '0' || *s > '9') 1586 id = VLAN_NONE; 1587 else 1588 id = (ushort)simple_strtoul(s, NULL, 10); 1589 1590 return htons(id); 1591 } 1592 1593 ushort env_get_vlan(char *var) 1594 { 1595 return string_to_vlan(env_get(var)); 1596 } 1597