1 /* 2 * Copied from Linux Monitor (LiMon) - Networking. 3 * 4 * Copyright 1994 - 2000 Neil Russell. 5 * (See License) 6 * Copyright 2000 Roland Borde 7 * Copyright 2000 Paolo Scaffardi 8 * Copyright 2000-2002 Wolfgang Denk, wd@denx.de 9 * SPDX-License-Identifier: GPL-2.0 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 83 84 #include <common.h> 85 #include <command.h> 86 #include <environment.h> 87 #include <net.h> 88 #if defined(CONFIG_STATUS_LED) 89 #include <miiphy.h> 90 #include <status_led.h> 91 #endif 92 #include <watchdog.h> 93 #include <linux/compiler.h> 94 #include "arp.h" 95 #include "bootp.h" 96 #include "cdp.h" 97 #if defined(CONFIG_CMD_DNS) 98 #include "dns.h" 99 #endif 100 #include "link_local.h" 101 #include "nfs.h" 102 #include "ping.h" 103 #include "rarp.h" 104 #if defined(CONFIG_CMD_SNTP) 105 #include "sntp.h" 106 #endif 107 #include "tftp.h" 108 109 DECLARE_GLOBAL_DATA_PTR; 110 111 /** BOOTP EXTENTIONS **/ 112 113 /* Our subnet mask (0=unknown) */ 114 IPaddr_t NetOurSubnetMask; 115 /* Our gateways IP address */ 116 IPaddr_t NetOurGatewayIP; 117 /* Our DNS IP address */ 118 IPaddr_t NetOurDNSIP; 119 #if defined(CONFIG_BOOTP_DNS2) 120 /* Our 2nd DNS IP address */ 121 IPaddr_t NetOurDNS2IP; 122 #endif 123 /* Our NIS domain */ 124 char NetOurNISDomain[32] = {0,}; 125 /* Our hostname */ 126 char NetOurHostName[32] = {0,}; 127 /* Our bootpath */ 128 char NetOurRootPath[64] = {0,}; 129 /* Our bootfile size in blocks */ 130 ushort NetBootFileSize; 131 132 #ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */ 133 IPaddr_t Mcast_addr; 134 #endif 135 136 /** END OF BOOTP EXTENTIONS **/ 137 138 /* The actual transferred size of the bootfile (in bytes) */ 139 ulong NetBootFileXferSize; 140 /* Our ethernet address */ 141 uchar NetOurEther[6]; 142 /* Boot server enet address */ 143 uchar NetServerEther[6]; 144 /* Our IP addr (0 = unknown) */ 145 IPaddr_t NetOurIP; 146 /* Server IP addr (0 = unknown) */ 147 IPaddr_t NetServerIP; 148 /* Current receive packet */ 149 uchar *NetRxPacket; 150 /* Current rx packet length */ 151 int NetRxPacketLen; 152 /* IP packet ID */ 153 unsigned NetIPID; 154 /* Ethernet bcast address */ 155 uchar NetBcastAddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 156 uchar NetEtherNullAddr[6]; 157 #ifdef CONFIG_API 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 NetRestartWrap; 164 /* Network loop restarted */ 165 static int NetRestarted; 166 /* At least one device configured */ 167 static int NetDevExists; 168 169 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */ 170 /* default is without VLAN */ 171 ushort NetOurVLAN = 0xFFFF; 172 /* ditto */ 173 ushort NetOurNativeVLAN = 0xFFFF; 174 175 /* Boot File name */ 176 char BootFile[128]; 177 178 #if defined(CONFIG_CMD_SNTP) 179 /* NTP server IP address */ 180 IPaddr_t NetNtpServerIP; 181 /* offset time from UTC */ 182 int NetTimeOffset; 183 #endif 184 185 static uchar PktBuf[(PKTBUFSRX+1) * PKTSIZE_ALIGN + PKTALIGN]; 186 187 /* Receive packet */ 188 uchar *NetRxPackets[PKTBUFSRX]; 189 190 /* Current UDP RX packet handler */ 191 static rxhand_f *udp_packet_handler; 192 /* Current ARP RX packet handler */ 193 static rxhand_f *arp_packet_handler; 194 #ifdef CONFIG_CMD_TFTPPUT 195 /* Current ICMP rx handler */ 196 static rxhand_icmp_f *packet_icmp_handler; 197 #endif 198 /* Current timeout handler */ 199 static thand_f *timeHandler; 200 /* Time base value */ 201 static ulong timeStart; 202 /* Current timeout value */ 203 static ulong timeDelta; 204 /* THE transmit packet */ 205 uchar *NetTxPacket; 206 207 static int net_check_prereq(enum proto_t protocol); 208 209 static int NetTryCount; 210 211 int __maybe_unused net_busy_flag; 212 213 /**********************************************************************/ 214 215 static int on_bootfile(const char *name, const char *value, enum env_op op, 216 int flags) 217 { 218 switch (op) { 219 case env_op_create: 220 case env_op_overwrite: 221 copy_filename(BootFile, value, sizeof(BootFile)); 222 break; 223 default: 224 break; 225 } 226 227 return 0; 228 } 229 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile); 230 231 /* 232 * Check if autoload is enabled. If so, use either NFS or TFTP to download 233 * the boot file. 234 */ 235 void net_auto_load(void) 236 { 237 #if defined(CONFIG_CMD_NFS) 238 const char *s = getenv("autoload"); 239 240 if (s != NULL && strcmp(s, "NFS") == 0) { 241 /* 242 * Use NFS to load the bootfile. 243 */ 244 NfsStart(); 245 return; 246 } 247 #endif 248 if (getenv_yesno("autoload") == 0) { 249 /* 250 * Just use BOOTP/RARP to configure system; 251 * Do not use TFTP to load the bootfile. 252 */ 253 net_set_state(NETLOOP_SUCCESS); 254 return; 255 } 256 TftpStart(TFTPGET); 257 } 258 259 static void NetInitLoop(void) 260 { 261 static int env_changed_id; 262 int env_id = get_env_id(); 263 264 /* update only when the environment has changed */ 265 if (env_changed_id != env_id) { 266 NetOurIP = getenv_IPaddr("ipaddr"); 267 NetOurGatewayIP = getenv_IPaddr("gatewayip"); 268 NetOurSubnetMask = getenv_IPaddr("netmask"); 269 NetServerIP = getenv_IPaddr("serverip"); 270 NetOurNativeVLAN = getenv_VLAN("nvlan"); 271 NetOurVLAN = getenv_VLAN("vlan"); 272 #if defined(CONFIG_CMD_DNS) 273 NetOurDNSIP = getenv_IPaddr("dnsip"); 274 #endif 275 env_changed_id = env_id; 276 } 277 if (eth_get_dev()) 278 memcpy(NetOurEther, eth_get_dev()->enetaddr, 6); 279 280 return; 281 } 282 283 static void net_clear_handlers(void) 284 { 285 net_set_udp_handler(NULL); 286 net_set_arp_handler(NULL); 287 NetSetTimeout(0, NULL); 288 } 289 290 static void net_cleanup_loop(void) 291 { 292 net_clear_handlers(); 293 } 294 295 void net_init(void) 296 { 297 static int first_call = 1; 298 299 if (first_call) { 300 /* 301 * Setup packet buffers, aligned correctly. 302 */ 303 int i; 304 305 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 306 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 307 for (i = 0; i < PKTBUFSRX; i++) 308 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN; 309 310 ArpInit(); 311 net_clear_handlers(); 312 313 /* Only need to setup buffer pointers once. */ 314 first_call = 0; 315 } 316 317 NetInitLoop(); 318 } 319 320 /**********************************************************************/ 321 /* 322 * Main network processing loop. 323 */ 324 325 int NetLoop(enum proto_t protocol) 326 { 327 bd_t *bd = gd->bd; 328 int ret = -1; 329 330 NetRestarted = 0; 331 NetDevExists = 0; 332 NetTryCount = 1; 333 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n"); 334 335 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start"); 336 net_init(); 337 if (eth_is_on_demand_init() || protocol != NETCONS) { 338 eth_halt(); 339 eth_set_current(); 340 if (eth_init(bd) < 0) { 341 eth_halt(); 342 return -1; 343 } 344 } else 345 eth_init_state_only(bd); 346 347 restart: 348 #ifdef CONFIG_USB_KEYBOARD 349 net_busy_flag = 0; 350 #endif 351 net_set_state(NETLOOP_CONTINUE); 352 353 /* 354 * Start the ball rolling with the given start function. From 355 * here on, this code is a state machine driven by received 356 * packets and timer events. 357 */ 358 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n"); 359 NetInitLoop(); 360 361 switch (net_check_prereq(protocol)) { 362 case 1: 363 /* network not configured */ 364 eth_halt(); 365 return -1; 366 367 case 2: 368 /* network device not configured */ 369 break; 370 371 case 0: 372 NetDevExists = 1; 373 NetBootFileXferSize = 0; 374 switch (protocol) { 375 case TFTPGET: 376 #ifdef CONFIG_CMD_TFTPPUT 377 case TFTPPUT: 378 #endif 379 /* always use ARP to get server ethernet address */ 380 TftpStart(protocol); 381 break; 382 #ifdef CONFIG_CMD_TFTPSRV 383 case TFTPSRV: 384 TftpStartServer(); 385 break; 386 #endif 387 #if defined(CONFIG_CMD_DHCP) 388 case DHCP: 389 BootpReset(); 390 NetOurIP = 0; 391 DhcpRequest(); /* Basically same as BOOTP */ 392 break; 393 #endif 394 395 case BOOTP: 396 BootpReset(); 397 NetOurIP = 0; 398 BootpRequest(); 399 break; 400 401 #if defined(CONFIG_CMD_RARP) 402 case RARP: 403 RarpTry = 0; 404 NetOurIP = 0; 405 RarpRequest(); 406 break; 407 #endif 408 #if defined(CONFIG_CMD_PING) 409 case PING: 410 ping_start(); 411 break; 412 #endif 413 #if defined(CONFIG_CMD_NFS) 414 case NFS: 415 NfsStart(); 416 break; 417 #endif 418 #if defined(CONFIG_CMD_CDP) 419 case CDP: 420 CDPStart(); 421 break; 422 #endif 423 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD) 424 case NETCONS: 425 NcStart(); 426 break; 427 #endif 428 #if defined(CONFIG_CMD_SNTP) 429 case SNTP: 430 SntpStart(); 431 break; 432 #endif 433 #if defined(CONFIG_CMD_DNS) 434 case DNS: 435 DnsStart(); 436 break; 437 #endif 438 #if defined(CONFIG_CMD_LINK_LOCAL) 439 case LINKLOCAL: 440 link_local_start(); 441 break; 442 #endif 443 default: 444 break; 445 } 446 447 break; 448 } 449 450 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 451 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 452 defined(CONFIG_STATUS_LED) && \ 453 defined(STATUS_LED_RED) 454 /* 455 * Echo the inverted link state to the fault LED. 456 */ 457 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) 458 status_led_set(STATUS_LED_RED, STATUS_LED_OFF); 459 else 460 status_led_set(STATUS_LED_RED, STATUS_LED_ON); 461 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 462 #endif /* CONFIG_MII, ... */ 463 #ifdef CONFIG_USB_KEYBOARD 464 net_busy_flag = 1; 465 #endif 466 467 /* 468 * Main packet reception loop. Loop receiving packets until 469 * someone sets `net_state' to a state that terminates. 470 */ 471 for (;;) { 472 WATCHDOG_RESET(); 473 #ifdef CONFIG_SHOW_ACTIVITY 474 show_activity(1); 475 #endif 476 /* 477 * Check the ethernet for a new packet. The ethernet 478 * receive routine will process it. 479 */ 480 eth_rx(); 481 482 /* 483 * Abort if ctrl-c was pressed. 484 */ 485 if (ctrlc()) { 486 /* cancel any ARP that may not have completed */ 487 NetArpWaitPacketIP = 0; 488 489 net_cleanup_loop(); 490 eth_halt(); 491 /* Invalidate the last protocol */ 492 eth_set_last_protocol(BOOTP); 493 494 puts("\nAbort\n"); 495 /* include a debug print as well incase the debug 496 messages are directed to stderr */ 497 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n"); 498 goto done; 499 } 500 501 ArpTimeoutCheck(); 502 503 /* 504 * Check for a timeout, and run the timeout handler 505 * if we have one. 506 */ 507 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 508 thand_f *x; 509 510 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 511 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 512 defined(CONFIG_STATUS_LED) && \ 513 defined(STATUS_LED_RED) 514 /* 515 * Echo the inverted link state to the fault LED. 516 */ 517 if (miiphy_link(eth_get_dev()->name, 518 CONFIG_SYS_FAULT_MII_ADDR)) { 519 status_led_set(STATUS_LED_RED, STATUS_LED_OFF); 520 } else { 521 status_led_set(STATUS_LED_RED, STATUS_LED_ON); 522 } 523 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 524 #endif /* CONFIG_MII, ... */ 525 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n"); 526 x = timeHandler; 527 timeHandler = (thand_f *)0; 528 (*x)(); 529 } 530 531 532 switch (net_state) { 533 534 case NETLOOP_RESTART: 535 NetRestarted = 1; 536 goto restart; 537 538 case NETLOOP_SUCCESS: 539 net_cleanup_loop(); 540 if (NetBootFileXferSize > 0) { 541 printf("Bytes transferred = %ld (%lx hex)\n", 542 NetBootFileXferSize, 543 NetBootFileXferSize); 544 setenv_hex("filesize", NetBootFileXferSize); 545 setenv_hex("fileaddr", load_addr); 546 } 547 if (protocol != NETCONS) 548 eth_halt(); 549 else 550 eth_halt_state_only(); 551 552 eth_set_last_protocol(protocol); 553 554 ret = NetBootFileXferSize; 555 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n"); 556 goto done; 557 558 case NETLOOP_FAIL: 559 net_cleanup_loop(); 560 /* Invalidate the last protocol */ 561 eth_set_last_protocol(BOOTP); 562 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n"); 563 goto done; 564 565 case NETLOOP_CONTINUE: 566 continue; 567 } 568 } 569 570 done: 571 #ifdef CONFIG_USB_KEYBOARD 572 net_busy_flag = 0; 573 #endif 574 #ifdef CONFIG_CMD_TFTPPUT 575 /* Clear out the handlers */ 576 net_set_udp_handler(NULL); 577 net_set_icmp_handler(NULL); 578 #endif 579 return ret; 580 } 581 582 /**********************************************************************/ 583 584 static void 585 startAgainTimeout(void) 586 { 587 net_set_state(NETLOOP_RESTART); 588 } 589 590 void NetStartAgain(void) 591 { 592 char *nretry; 593 int retry_forever = 0; 594 unsigned long retrycnt = 0; 595 596 nretry = getenv("netretry"); 597 if (nretry) { 598 if (!strcmp(nretry, "yes")) 599 retry_forever = 1; 600 else if (!strcmp(nretry, "no")) 601 retrycnt = 0; 602 else if (!strcmp(nretry, "once")) 603 retrycnt = 1; 604 else 605 retrycnt = simple_strtoul(nretry, NULL, 0); 606 } else 607 retry_forever = 1; 608 609 if ((!retry_forever) && (NetTryCount >= retrycnt)) { 610 eth_halt(); 611 net_set_state(NETLOOP_FAIL); 612 return; 613 } 614 615 NetTryCount++; 616 617 eth_halt(); 618 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 619 eth_try_another(!NetRestarted); 620 #endif 621 eth_init(gd->bd); 622 if (NetRestartWrap) { 623 NetRestartWrap = 0; 624 if (NetDevExists) { 625 NetSetTimeout(10000UL, startAgainTimeout); 626 net_set_udp_handler(NULL); 627 } else { 628 net_set_state(NETLOOP_FAIL); 629 } 630 } else { 631 net_set_state(NETLOOP_RESTART); 632 } 633 } 634 635 /**********************************************************************/ 636 /* 637 * Miscelaneous bits. 638 */ 639 640 static void dummy_handler(uchar *pkt, unsigned dport, 641 IPaddr_t sip, unsigned sport, 642 unsigned len) 643 { 644 } 645 646 rxhand_f *net_get_udp_handler(void) 647 { 648 return udp_packet_handler; 649 } 650 651 void net_set_udp_handler(rxhand_f *f) 652 { 653 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f); 654 if (f == NULL) 655 udp_packet_handler = dummy_handler; 656 else 657 udp_packet_handler = f; 658 } 659 660 rxhand_f *net_get_arp_handler(void) 661 { 662 return arp_packet_handler; 663 } 664 665 void net_set_arp_handler(rxhand_f *f) 666 { 667 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f); 668 if (f == NULL) 669 arp_packet_handler = dummy_handler; 670 else 671 arp_packet_handler = f; 672 } 673 674 #ifdef CONFIG_CMD_TFTPPUT 675 void net_set_icmp_handler(rxhand_icmp_f *f) 676 { 677 packet_icmp_handler = f; 678 } 679 #endif 680 681 void 682 NetSetTimeout(ulong iv, thand_f *f) 683 { 684 if (iv == 0) { 685 debug_cond(DEBUG_INT_STATE, 686 "--- NetLoop timeout handler cancelled\n"); 687 timeHandler = (thand_f *)0; 688 } else { 689 debug_cond(DEBUG_INT_STATE, 690 "--- NetLoop timeout handler set (%p)\n", f); 691 timeHandler = f; 692 timeStart = get_timer(0); 693 timeDelta = iv * CONFIG_SYS_HZ / 1000; 694 } 695 } 696 697 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, 698 int payload_len) 699 { 700 uchar *pkt; 701 int eth_hdr_size; 702 int pkt_hdr_size; 703 704 /* make sure the NetTxPacket is initialized (NetInit() was called) */ 705 assert(NetTxPacket != NULL); 706 if (NetTxPacket == NULL) 707 return -1; 708 709 /* convert to new style broadcast */ 710 if (dest == 0) 711 dest = 0xFFFFFFFF; 712 713 /* if broadcast, make the ether address a broadcast and don't do ARP */ 714 if (dest == 0xFFFFFFFF) 715 ether = NetBcastAddr; 716 717 pkt = (uchar *)NetTxPacket; 718 719 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP); 720 pkt += eth_hdr_size; 721 net_set_udp_header(pkt, dest, dport, sport, payload_len); 722 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE; 723 724 /* if MAC address was not discovered yet, do an ARP request */ 725 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 726 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest); 727 728 /* save the ip and eth addr for the packet to send after arp */ 729 NetArpWaitPacketIP = dest; 730 NetArpWaitPacketMAC = ether; 731 732 /* size of the waiting packet */ 733 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len; 734 735 /* and do the ARP request */ 736 NetArpWaitTry = 1; 737 NetArpWaitTimerStart = get_timer(0); 738 ArpRequest(); 739 return 1; /* waiting */ 740 } else { 741 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n", 742 &dest, ether); 743 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len); 744 return 0; /* transmitted */ 745 } 746 } 747 748 #ifdef CONFIG_IP_DEFRAG 749 /* 750 * This function collects fragments in a single packet, according 751 * to the algorithm in RFC815. It returns NULL or the pointer to 752 * a complete packet, in static storage 753 */ 754 #ifndef CONFIG_NET_MAXDEFRAG 755 #define CONFIG_NET_MAXDEFRAG 16384 756 #endif 757 /* 758 * MAXDEFRAG, above, is chosen in the config file and is real data 759 * so we need to add the NFS overhead, which is more than TFTP. 760 * To use sizeof in the internal unnamed structures, we need a real 761 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately). 762 * The compiler doesn't complain nor allocates the actual structure 763 */ 764 static struct rpc_t rpc_specimen; 765 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply)) 766 767 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE) 768 769 /* 770 * this is the packet being assembled, either data or frag control. 771 * Fragments go by 8 bytes, so this union must be 8 bytes long 772 */ 773 struct hole { 774 /* first_byte is address of this structure */ 775 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ 776 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ 777 u16 prev_hole; /* index of prev, 0 == none */ 778 u16 unused; 779 }; 780 781 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp) 782 { 783 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN); 784 static u16 first_hole, total_len; 785 struct hole *payload, *thisfrag, *h, *newh; 786 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff; 787 uchar *indata = (uchar *)ip; 788 int offset8, start, len, done = 0; 789 u16 ip_off = ntohs(ip->ip_off); 790 791 /* payload starts after IP header, this fragment is in there */ 792 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE); 793 offset8 = (ip_off & IP_OFFS); 794 thisfrag = payload + offset8; 795 start = offset8 * 8; 796 len = ntohs(ip->ip_len) - IP_HDR_SIZE; 797 798 if (start + len > IP_MAXUDP) /* fragment extends too far */ 799 return NULL; 800 801 if (!total_len || localip->ip_id != ip->ip_id) { 802 /* new (or different) packet, reset structs */ 803 total_len = 0xffff; 804 payload[0].last_byte = ~0; 805 payload[0].next_hole = 0; 806 payload[0].prev_hole = 0; 807 first_hole = 0; 808 /* any IP header will work, copy the first we received */ 809 memcpy(localip, ip, IP_HDR_SIZE); 810 } 811 812 /* 813 * What follows is the reassembly algorithm. We use the payload 814 * array as a linked list of hole descriptors, as each hole starts 815 * at a multiple of 8 bytes. However, last byte can be whatever value, 816 * so it is represented as byte count, not as 8-byte blocks. 817 */ 818 819 h = payload + first_hole; 820 while (h->last_byte < start) { 821 if (!h->next_hole) { 822 /* no hole that far away */ 823 return NULL; 824 } 825 h = payload + h->next_hole; 826 } 827 828 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ 829 if (offset8 + ((len + 7) / 8) <= h - payload) { 830 /* no overlap with holes (dup fragment?) */ 831 return NULL; 832 } 833 834 if (!(ip_off & IP_FLAGS_MFRAG)) { 835 /* no more fragmentss: truncate this (last) hole */ 836 total_len = start + len; 837 h->last_byte = start + len; 838 } 839 840 /* 841 * There is some overlap: fix the hole list. This code doesn't 842 * deal with a fragment that overlaps with two different holes 843 * (thus being a superset of a previously-received fragment). 844 */ 845 846 if ((h >= thisfrag) && (h->last_byte <= start + len)) { 847 /* complete overlap with hole: remove hole */ 848 if (!h->prev_hole && !h->next_hole) { 849 /* last remaining hole */ 850 done = 1; 851 } else if (!h->prev_hole) { 852 /* first hole */ 853 first_hole = h->next_hole; 854 payload[h->next_hole].prev_hole = 0; 855 } else if (!h->next_hole) { 856 /* last hole */ 857 payload[h->prev_hole].next_hole = 0; 858 } else { 859 /* in the middle of the list */ 860 payload[h->next_hole].prev_hole = h->prev_hole; 861 payload[h->prev_hole].next_hole = h->next_hole; 862 } 863 864 } else if (h->last_byte <= start + len) { 865 /* overlaps with final part of the hole: shorten this hole */ 866 h->last_byte = start; 867 868 } else if (h >= thisfrag) { 869 /* overlaps with initial part of the hole: move this hole */ 870 newh = thisfrag + (len / 8); 871 *newh = *h; 872 h = newh; 873 if (h->next_hole) 874 payload[h->next_hole].prev_hole = (h - payload); 875 if (h->prev_hole) 876 payload[h->prev_hole].next_hole = (h - payload); 877 else 878 first_hole = (h - payload); 879 880 } else { 881 /* fragment sits in the middle: split the hole */ 882 newh = thisfrag + (len / 8); 883 *newh = *h; 884 h->last_byte = start; 885 h->next_hole = (newh - payload); 886 newh->prev_hole = (h - payload); 887 if (newh->next_hole) 888 payload[newh->next_hole].prev_hole = (newh - payload); 889 } 890 891 /* finally copy this fragment and possibly return whole packet */ 892 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len); 893 if (!done) 894 return NULL; 895 896 localip->ip_len = htons(total_len); 897 *lenp = total_len + IP_HDR_SIZE; 898 return localip; 899 } 900 901 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) 902 { 903 u16 ip_off = ntohs(ip->ip_off); 904 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 905 return ip; /* not a fragment */ 906 return __NetDefragment(ip, lenp); 907 } 908 909 #else /* !CONFIG_IP_DEFRAG */ 910 911 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) 912 { 913 u16 ip_off = ntohs(ip->ip_off); 914 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 915 return ip; /* not a fragment */ 916 return NULL; 917 } 918 #endif 919 920 /** 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 IPaddr_t src_ip, struct ethernet_hdr *et) 928 { 929 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src; 930 931 switch (icmph->type) { 932 case ICMP_REDIRECT: 933 if (icmph->code != ICMP_REDIR_HOST) 934 return; 935 printf(" ICMP Host Redirect to %pI4 ", 936 &icmph->un.gateway); 937 break; 938 default: 939 #if defined(CONFIG_CMD_PING) 940 ping_receive(et, ip, len); 941 #endif 942 #ifdef CONFIG_CMD_TFTPPUT 943 if (packet_icmp_handler) 944 packet_icmp_handler(icmph->type, icmph->code, 945 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src), 946 icmph->un.data, ntohs(ip->udp_len)); 947 #endif 948 break; 949 } 950 } 951 952 void 953 NetReceive(uchar *inpkt, int len) 954 { 955 struct ethernet_hdr *et; 956 struct ip_udp_hdr *ip; 957 IPaddr_t dst_ip; 958 IPaddr_t src_ip; 959 int eth_proto; 960 #if defined(CONFIG_CMD_CDP) 961 int iscdp; 962 #endif 963 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 964 965 debug_cond(DEBUG_NET_PKT, "packet received\n"); 966 967 NetRxPacket = inpkt; 968 NetRxPacketLen = len; 969 et = (struct ethernet_hdr *)inpkt; 970 971 /* too small packet? */ 972 if (len < ETHER_HDR_SIZE) 973 return; 974 975 #ifdef CONFIG_API 976 if (push_packet) { 977 (*push_packet)(inpkt, len); 978 return; 979 } 980 #endif 981 982 #if defined(CONFIG_CMD_CDP) 983 /* keep track if packet is CDP */ 984 iscdp = is_cdp_packet(et->et_dest); 985 #endif 986 987 myvlanid = ntohs(NetOurVLAN); 988 if (myvlanid == (ushort)-1) 989 myvlanid = VLAN_NONE; 990 mynvlanid = ntohs(NetOurNativeVLAN); 991 if (mynvlanid == (ushort)-1) 992 mynvlanid = VLAN_NONE; 993 994 eth_proto = ntohs(et->et_protlen); 995 996 if (eth_proto < 1514) { 997 struct e802_hdr *et802 = (struct e802_hdr *)et; 998 /* 999 * Got a 802.2 packet. Check the other protocol field. 1000 * XXX VLAN over 802.2+SNAP not implemented! 1001 */ 1002 eth_proto = ntohs(et802->et_prot); 1003 1004 ip = (struct ip_udp_hdr *)(inpkt + E802_HDR_SIZE); 1005 len -= E802_HDR_SIZE; 1006 1007 } else if (eth_proto != PROT_VLAN) { /* normal packet */ 1008 ip = (struct ip_udp_hdr *)(inpkt + ETHER_HDR_SIZE); 1009 len -= ETHER_HDR_SIZE; 1010 1011 } else { /* VLAN packet */ 1012 struct vlan_ethernet_hdr *vet = 1013 (struct vlan_ethernet_hdr *)et; 1014 1015 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n"); 1016 1017 /* too small packet? */ 1018 if (len < VLAN_ETHER_HDR_SIZE) 1019 return; 1020 1021 /* if no VLAN active */ 1022 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1023 #if defined(CONFIG_CMD_CDP) 1024 && iscdp == 0 1025 #endif 1026 ) 1027 return; 1028 1029 cti = ntohs(vet->vet_tag); 1030 vlanid = cti & VLAN_IDMASK; 1031 eth_proto = ntohs(vet->vet_type); 1032 1033 ip = (struct ip_udp_hdr *)(inpkt + VLAN_ETHER_HDR_SIZE); 1034 len -= VLAN_ETHER_HDR_SIZE; 1035 } 1036 1037 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto); 1038 1039 #if defined(CONFIG_CMD_CDP) 1040 if (iscdp) { 1041 cdp_receive((uchar *)ip, len); 1042 return; 1043 } 1044 #endif 1045 1046 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1047 if (vlanid == VLAN_NONE) 1048 vlanid = (mynvlanid & VLAN_IDMASK); 1049 /* not matched? */ 1050 if (vlanid != (myvlanid & VLAN_IDMASK)) 1051 return; 1052 } 1053 1054 switch (eth_proto) { 1055 1056 case PROT_ARP: 1057 ArpReceive(et, ip, len); 1058 break; 1059 1060 #ifdef CONFIG_CMD_RARP 1061 case PROT_RARP: 1062 rarp_receive(ip, len); 1063 break; 1064 #endif 1065 case PROT_IP: 1066 debug_cond(DEBUG_NET_PKT, "Got IP\n"); 1067 /* Before we start poking the header, make sure it is there */ 1068 if (len < IP_UDP_HDR_SIZE) { 1069 debug("len bad %d < %lu\n", len, 1070 (ulong)IP_UDP_HDR_SIZE); 1071 return; 1072 } 1073 /* Check the packet length */ 1074 if (len < ntohs(ip->ip_len)) { 1075 debug("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1076 return; 1077 } 1078 len = ntohs(ip->ip_len); 1079 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n", 1080 len, ip->ip_hl_v & 0xff); 1081 1082 /* Can't deal with anything except IPv4 */ 1083 if ((ip->ip_hl_v & 0xf0) != 0x40) 1084 return; 1085 /* Can't deal with IP options (headers != 20 bytes) */ 1086 if ((ip->ip_hl_v & 0x0f) > 0x05) 1087 return; 1088 /* Check the Checksum of the header */ 1089 if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) { 1090 debug("checksum bad\n"); 1091 return; 1092 } 1093 /* If it is not for us, ignore it */ 1094 dst_ip = NetReadIP(&ip->ip_dst); 1095 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) { 1096 #ifdef CONFIG_MCAST_TFTP 1097 if (Mcast_addr != dst_ip) 1098 #endif 1099 return; 1100 } 1101 /* Read source IP address for later use */ 1102 src_ip = NetReadIP(&ip->ip_src); 1103 /* 1104 * The function returns the unchanged packet if it's not 1105 * a fragment, and either the complete packet or NULL if 1106 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) 1107 */ 1108 ip = NetDefragment(ip, &len); 1109 if (!ip) 1110 return; 1111 /* 1112 * watch for ICMP host redirects 1113 * 1114 * There is no real handler code (yet). We just watch 1115 * for ICMP host redirect messages. In case anybody 1116 * sees these messages: please contact me 1117 * (wd@denx.de), or - even better - send me the 1118 * necessary fixes :-) 1119 * 1120 * Note: in all cases where I have seen this so far 1121 * it was a problem with the router configuration, 1122 * for instance when a router was configured in the 1123 * BOOTP reply, but the TFTP server was on the same 1124 * subnet. So this is probably a warning that your 1125 * configuration might be wrong. But I'm not really 1126 * sure if there aren't any other situations. 1127 * 1128 * Simon Glass <sjg@chromium.org>: We get an ICMP when 1129 * we send a tftp packet to a dead connection, or when 1130 * there is no server at the other end. 1131 */ 1132 if (ip->ip_p == IPPROTO_ICMP) { 1133 receive_icmp(ip, len, src_ip, et); 1134 return; 1135 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1136 return; 1137 } 1138 1139 debug_cond(DEBUG_DEV_PKT, 1140 "received UDP (to=%pI4, from=%pI4, len=%d)\n", 1141 &dst_ip, &src_ip, len); 1142 1143 #ifdef CONFIG_UDP_CHECKSUM 1144 if (ip->udp_xsum != 0) { 1145 ulong xsum; 1146 ushort *sumptr; 1147 ushort sumlen; 1148 1149 xsum = ip->ip_p; 1150 xsum += (ntohs(ip->udp_len)); 1151 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1152 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1153 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1154 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1155 1156 sumlen = ntohs(ip->udp_len); 1157 sumptr = (ushort *) &(ip->udp_src); 1158 1159 while (sumlen > 1) { 1160 ushort sumdata; 1161 1162 sumdata = *sumptr++; 1163 xsum += ntohs(sumdata); 1164 sumlen -= 2; 1165 } 1166 if (sumlen > 0) { 1167 ushort sumdata; 1168 1169 sumdata = *(unsigned char *) sumptr; 1170 sumdata = (sumdata << 8) & 0xff00; 1171 xsum += sumdata; 1172 } 1173 while ((xsum >> 16) != 0) { 1174 xsum = (xsum & 0x0000ffff) + 1175 ((xsum >> 16) & 0x0000ffff); 1176 } 1177 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1178 printf(" UDP wrong checksum %08lx %08x\n", 1179 xsum, ntohs(ip->udp_xsum)); 1180 return; 1181 } 1182 } 1183 #endif 1184 1185 1186 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD) 1187 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE, 1188 src_ip, 1189 ntohs(ip->udp_dst), 1190 ntohs(ip->udp_src), 1191 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1192 #endif 1193 /* 1194 * IP header OK. Pass the packet to the current handler. 1195 */ 1196 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE, 1197 ntohs(ip->udp_dst), 1198 src_ip, 1199 ntohs(ip->udp_src), 1200 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1201 break; 1202 } 1203 } 1204 1205 1206 /**********************************************************************/ 1207 1208 static int net_check_prereq(enum proto_t protocol) 1209 { 1210 switch (protocol) { 1211 /* Fall through */ 1212 #if defined(CONFIG_CMD_PING) 1213 case PING: 1214 if (NetPingIP == 0) { 1215 puts("*** ERROR: ping address not given\n"); 1216 return 1; 1217 } 1218 goto common; 1219 #endif 1220 #if defined(CONFIG_CMD_SNTP) 1221 case SNTP: 1222 if (NetNtpServerIP == 0) { 1223 puts("*** ERROR: NTP server address not given\n"); 1224 return 1; 1225 } 1226 goto common; 1227 #endif 1228 #if defined(CONFIG_CMD_DNS) 1229 case DNS: 1230 if (NetOurDNSIP == 0) { 1231 puts("*** ERROR: DNS server address not given\n"); 1232 return 1; 1233 } 1234 goto common; 1235 #endif 1236 #if defined(CONFIG_CMD_NFS) 1237 case NFS: 1238 #endif 1239 case TFTPGET: 1240 case TFTPPUT: 1241 if (NetServerIP == 0) { 1242 puts("*** ERROR: `serverip' not set\n"); 1243 return 1; 1244 } 1245 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ 1246 defined(CONFIG_CMD_DNS) 1247 common: 1248 #endif 1249 /* Fall through */ 1250 1251 case NETCONS: 1252 case TFTPSRV: 1253 if (NetOurIP == 0) { 1254 puts("*** ERROR: `ipaddr' not set\n"); 1255 return 1; 1256 } 1257 /* Fall through */ 1258 1259 #ifdef CONFIG_CMD_RARP 1260 case RARP: 1261 #endif 1262 case BOOTP: 1263 case CDP: 1264 case DHCP: 1265 case LINKLOCAL: 1266 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1267 int num = eth_get_dev_index(); 1268 1269 switch (num) { 1270 case -1: 1271 puts("*** ERROR: No ethernet found.\n"); 1272 return 1; 1273 case 0: 1274 puts("*** ERROR: `ethaddr' not set\n"); 1275 break; 1276 default: 1277 printf("*** ERROR: `eth%daddr' not set\n", 1278 num); 1279 break; 1280 } 1281 1282 NetStartAgain(); 1283 return 2; 1284 } 1285 /* Fall through */ 1286 default: 1287 return 0; 1288 } 1289 return 0; /* OK */ 1290 } 1291 /**********************************************************************/ 1292 1293 int 1294 NetCksumOk(uchar *ptr, int len) 1295 { 1296 return !((NetCksum(ptr, len) + 1) & 0xfffe); 1297 } 1298 1299 1300 unsigned 1301 NetCksum(uchar *ptr, int len) 1302 { 1303 ulong xsum; 1304 ushort *p = (ushort *)ptr; 1305 1306 xsum = 0; 1307 while (len-- > 0) 1308 xsum += *p++; 1309 xsum = (xsum & 0xffff) + (xsum >> 16); 1310 xsum = (xsum & 0xffff) + (xsum >> 16); 1311 return xsum & 0xffff; 1312 } 1313 1314 int 1315 NetEthHdrSize(void) 1316 { 1317 ushort myvlanid; 1318 1319 myvlanid = ntohs(NetOurVLAN); 1320 if (myvlanid == (ushort)-1) 1321 myvlanid = VLAN_NONE; 1322 1323 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : 1324 VLAN_ETHER_HDR_SIZE; 1325 } 1326 1327 int 1328 NetSetEther(uchar *xet, uchar * addr, uint prot) 1329 { 1330 struct ethernet_hdr *et = (struct ethernet_hdr *)xet; 1331 ushort myvlanid; 1332 1333 myvlanid = ntohs(NetOurVLAN); 1334 if (myvlanid == (ushort)-1) 1335 myvlanid = VLAN_NONE; 1336 1337 memcpy(et->et_dest, addr, 6); 1338 memcpy(et->et_src, NetOurEther, 6); 1339 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1340 et->et_protlen = htons(prot); 1341 return ETHER_HDR_SIZE; 1342 } else { 1343 struct vlan_ethernet_hdr *vet = 1344 (struct vlan_ethernet_hdr *)xet; 1345 1346 vet->vet_vlan_type = htons(PROT_VLAN); 1347 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1348 vet->vet_type = htons(prot); 1349 return VLAN_ETHER_HDR_SIZE; 1350 } 1351 } 1352 1353 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot) 1354 { 1355 ushort protlen; 1356 1357 memcpy(et->et_dest, addr, 6); 1358 memcpy(et->et_src, NetOurEther, 6); 1359 protlen = ntohs(et->et_protlen); 1360 if (protlen == PROT_VLAN) { 1361 struct vlan_ethernet_hdr *vet = 1362 (struct vlan_ethernet_hdr *)et; 1363 vet->vet_type = htons(prot); 1364 return VLAN_ETHER_HDR_SIZE; 1365 } else if (protlen > 1514) { 1366 et->et_protlen = htons(prot); 1367 return ETHER_HDR_SIZE; 1368 } else { 1369 /* 802.2 + SNAP */ 1370 struct e802_hdr *et802 = (struct e802_hdr *)et; 1371 et802->et_prot = htons(prot); 1372 return E802_HDR_SIZE; 1373 } 1374 } 1375 1376 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source) 1377 { 1378 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1379 1380 /* 1381 * Construct an IP header. 1382 */ 1383 /* IP_HDR_SIZE / 4 (not including UDP) */ 1384 ip->ip_hl_v = 0x45; 1385 ip->ip_tos = 0; 1386 ip->ip_len = htons(IP_HDR_SIZE); 1387 ip->ip_id = htons(NetIPID++); 1388 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1389 ip->ip_ttl = 255; 1390 ip->ip_sum = 0; 1391 /* already in network byte order */ 1392 NetCopyIP((void *)&ip->ip_src, &source); 1393 /* already in network byte order */ 1394 NetCopyIP((void *)&ip->ip_dst, &dest); 1395 } 1396 1397 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport, 1398 int len) 1399 { 1400 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1401 1402 /* 1403 * If the data is an odd number of bytes, zero the 1404 * byte after the last byte so that the checksum 1405 * will work. 1406 */ 1407 if (len & 1) 1408 pkt[IP_UDP_HDR_SIZE + len] = 0; 1409 1410 net_set_ip_header(pkt, dest, NetOurIP); 1411 ip->ip_len = htons(IP_UDP_HDR_SIZE + len); 1412 ip->ip_p = IPPROTO_UDP; 1413 ip->ip_sum = ~NetCksum((uchar *)ip, IP_HDR_SIZE >> 1); 1414 1415 ip->udp_src = htons(sport); 1416 ip->udp_dst = htons(dport); 1417 ip->udp_len = htons(UDP_HDR_SIZE + len); 1418 ip->udp_xsum = 0; 1419 } 1420 1421 void copy_filename(char *dst, const char *src, int size) 1422 { 1423 if (*src && (*src == '"')) { 1424 ++src; 1425 --size; 1426 } 1427 1428 while ((--size > 0) && *src && (*src != '"')) 1429 *dst++ = *src++; 1430 *dst = '\0'; 1431 } 1432 1433 #if defined(CONFIG_CMD_NFS) || \ 1434 defined(CONFIG_CMD_SNTP) || \ 1435 defined(CONFIG_CMD_DNS) 1436 /* 1437 * make port a little random (1024-17407) 1438 * This keeps the math somewhat trivial to compute, and seems to work with 1439 * all supported protocols/clients/servers 1440 */ 1441 unsigned int random_port(void) 1442 { 1443 return 1024 + (get_timer(0) % 0x4000); 1444 } 1445 #endif 1446 1447 void ip_to_string(IPaddr_t x, char *s) 1448 { 1449 x = ntohl(x); 1450 sprintf(s, "%d.%d.%d.%d", 1451 (int) ((x >> 24) & 0xff), 1452 (int) ((x >> 16) & 0xff), 1453 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1454 ); 1455 } 1456 1457 void VLAN_to_string(ushort x, char *s) 1458 { 1459 x = ntohs(x); 1460 1461 if (x == (ushort)-1) 1462 x = VLAN_NONE; 1463 1464 if (x == VLAN_NONE) 1465 strcpy(s, "none"); 1466 else 1467 sprintf(s, "%d", x & VLAN_IDMASK); 1468 } 1469 1470 ushort string_to_VLAN(const char *s) 1471 { 1472 ushort id; 1473 1474 if (s == NULL) 1475 return htons(VLAN_NONE); 1476 1477 if (*s < '0' || *s > '9') 1478 id = VLAN_NONE; 1479 else 1480 id = (ushort)simple_strtoul(s, NULL, 10); 1481 1482 return htons(id); 1483 } 1484 1485 ushort getenv_VLAN(char *var) 1486 { 1487 return string_to_VLAN(getenv(var)); 1488 } 1489