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 #ifdef CONFIG_DM_ETH 187 /* Receive packets */ 188 uchar *net_rx_packets[PKTBUFSRX]; 189 #else 190 /* Receive packet */ 191 uchar *NetRxPackets[PKTBUFSRX]; 192 #endif 193 /* Current UDP RX packet handler */ 194 static rxhand_f *udp_packet_handler; 195 /* Current ARP RX packet handler */ 196 static rxhand_f *arp_packet_handler; 197 #ifdef CONFIG_CMD_TFTPPUT 198 /* Current ICMP rx handler */ 199 static rxhand_icmp_f *packet_icmp_handler; 200 #endif 201 /* Current timeout handler */ 202 static thand_f *timeHandler; 203 /* Time base value */ 204 static ulong timeStart; 205 /* Current timeout value */ 206 static ulong timeDelta; 207 /* THE transmit packet */ 208 uchar *NetTxPacket; 209 210 static int net_check_prereq(enum proto_t protocol); 211 212 static int NetTryCount; 213 214 int __maybe_unused net_busy_flag; 215 216 /**********************************************************************/ 217 218 static int on_bootfile(const char *name, const char *value, enum env_op op, 219 int flags) 220 { 221 switch (op) { 222 case env_op_create: 223 case env_op_overwrite: 224 copy_filename(BootFile, value, sizeof(BootFile)); 225 break; 226 default: 227 break; 228 } 229 230 return 0; 231 } 232 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile); 233 234 /* 235 * Check if autoload is enabled. If so, use either NFS or TFTP to download 236 * the boot file. 237 */ 238 void net_auto_load(void) 239 { 240 #if defined(CONFIG_CMD_NFS) 241 const char *s = getenv("autoload"); 242 243 if (s != NULL && strcmp(s, "NFS") == 0) { 244 /* 245 * Use NFS to load the bootfile. 246 */ 247 NfsStart(); 248 return; 249 } 250 #endif 251 if (getenv_yesno("autoload") == 0) { 252 /* 253 * Just use BOOTP/RARP to configure system; 254 * Do not use TFTP to load the bootfile. 255 */ 256 net_set_state(NETLOOP_SUCCESS); 257 return; 258 } 259 TftpStart(TFTPGET); 260 } 261 262 static void NetInitLoop(void) 263 { 264 static int env_changed_id; 265 int env_id = get_env_id(); 266 267 /* update only when the environment has changed */ 268 if (env_changed_id != env_id) { 269 NetOurIP = getenv_IPaddr("ipaddr"); 270 NetOurGatewayIP = getenv_IPaddr("gatewayip"); 271 NetOurSubnetMask = getenv_IPaddr("netmask"); 272 NetServerIP = getenv_IPaddr("serverip"); 273 NetOurNativeVLAN = getenv_VLAN("nvlan"); 274 NetOurVLAN = getenv_VLAN("vlan"); 275 #if defined(CONFIG_CMD_DNS) 276 NetOurDNSIP = getenv_IPaddr("dnsip"); 277 #endif 278 env_changed_id = env_id; 279 } 280 if (eth_get_dev()) 281 memcpy(NetOurEther, eth_get_ethaddr(), 6); 282 283 return; 284 } 285 286 static void net_clear_handlers(void) 287 { 288 net_set_udp_handler(NULL); 289 net_set_arp_handler(NULL); 290 NetSetTimeout(0, NULL); 291 } 292 293 static void net_cleanup_loop(void) 294 { 295 net_clear_handlers(); 296 } 297 298 void net_init(void) 299 { 300 static int first_call = 1; 301 302 if (first_call) { 303 /* 304 * Setup packet buffers, aligned correctly. 305 */ 306 int i; 307 308 NetTxPacket = &PktBuf[0] + (PKTALIGN - 1); 309 NetTxPacket -= (ulong)NetTxPacket % PKTALIGN; 310 #ifdef CONFIG_DM_ETH 311 for (i = 0; i < PKTBUFSRX; i++) { 312 net_rx_packets[i] = NetTxPacket + (i + 1) * 313 PKTSIZE_ALIGN; 314 } 315 #else 316 for (i = 0; i < PKTBUFSRX; i++) 317 NetRxPackets[i] = NetTxPacket + (i + 1) * PKTSIZE_ALIGN; 318 #endif 319 ArpInit(); 320 net_clear_handlers(); 321 322 /* Only need to setup buffer pointers once. */ 323 first_call = 0; 324 } 325 326 NetInitLoop(); 327 } 328 329 /**********************************************************************/ 330 /* 331 * Main network processing loop. 332 */ 333 334 int NetLoop(enum proto_t protocol) 335 { 336 int ret = -1; 337 338 NetRestarted = 0; 339 NetDevExists = 0; 340 NetTryCount = 1; 341 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n"); 342 343 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start"); 344 net_init(); 345 if (eth_is_on_demand_init() || protocol != NETCONS) { 346 eth_halt(); 347 eth_set_current(); 348 if (eth_init() < 0) { 349 eth_halt(); 350 return -1; 351 } 352 } else 353 eth_init_state_only(); 354 355 restart: 356 #ifdef CONFIG_USB_KEYBOARD 357 net_busy_flag = 0; 358 #endif 359 net_set_state(NETLOOP_CONTINUE); 360 361 /* 362 * Start the ball rolling with the given start function. From 363 * here on, this code is a state machine driven by received 364 * packets and timer events. 365 */ 366 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n"); 367 NetInitLoop(); 368 369 switch (net_check_prereq(protocol)) { 370 case 1: 371 /* network not configured */ 372 eth_halt(); 373 return -1; 374 375 case 2: 376 /* network device not configured */ 377 break; 378 379 case 0: 380 NetDevExists = 1; 381 NetBootFileXferSize = 0; 382 switch (protocol) { 383 case TFTPGET: 384 #ifdef CONFIG_CMD_TFTPPUT 385 case TFTPPUT: 386 #endif 387 /* always use ARP to get server ethernet address */ 388 TftpStart(protocol); 389 break; 390 #ifdef CONFIG_CMD_TFTPSRV 391 case TFTPSRV: 392 TftpStartServer(); 393 break; 394 #endif 395 #if defined(CONFIG_CMD_DHCP) 396 case DHCP: 397 BootpReset(); 398 NetOurIP = 0; 399 DhcpRequest(); /* Basically same as BOOTP */ 400 break; 401 #endif 402 403 case BOOTP: 404 BootpReset(); 405 NetOurIP = 0; 406 BootpRequest(); 407 break; 408 409 #if defined(CONFIG_CMD_RARP) 410 case RARP: 411 RarpTry = 0; 412 NetOurIP = 0; 413 RarpRequest(); 414 break; 415 #endif 416 #if defined(CONFIG_CMD_PING) 417 case PING: 418 ping_start(); 419 break; 420 #endif 421 #if defined(CONFIG_CMD_NFS) 422 case NFS: 423 NfsStart(); 424 break; 425 #endif 426 #if defined(CONFIG_CMD_CDP) 427 case CDP: 428 CDPStart(); 429 break; 430 #endif 431 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD) 432 case NETCONS: 433 NcStart(); 434 break; 435 #endif 436 #if defined(CONFIG_CMD_SNTP) 437 case SNTP: 438 SntpStart(); 439 break; 440 #endif 441 #if defined(CONFIG_CMD_DNS) 442 case DNS: 443 DnsStart(); 444 break; 445 #endif 446 #if defined(CONFIG_CMD_LINK_LOCAL) 447 case LINKLOCAL: 448 link_local_start(); 449 break; 450 #endif 451 default: 452 break; 453 } 454 455 break; 456 } 457 458 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 459 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 460 defined(CONFIG_STATUS_LED) && \ 461 defined(STATUS_LED_RED) 462 /* 463 * Echo the inverted link state to the fault LED. 464 */ 465 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) 466 status_led_set(STATUS_LED_RED, STATUS_LED_OFF); 467 else 468 status_led_set(STATUS_LED_RED, STATUS_LED_ON); 469 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 470 #endif /* CONFIG_MII, ... */ 471 #ifdef CONFIG_USB_KEYBOARD 472 net_busy_flag = 1; 473 #endif 474 475 /* 476 * Main packet reception loop. Loop receiving packets until 477 * someone sets `net_state' to a state that terminates. 478 */ 479 for (;;) { 480 WATCHDOG_RESET(); 481 #ifdef CONFIG_SHOW_ACTIVITY 482 show_activity(1); 483 #endif 484 /* 485 * Check the ethernet for a new packet. The ethernet 486 * receive routine will process it. 487 */ 488 eth_rx(); 489 490 /* 491 * Abort if ctrl-c was pressed. 492 */ 493 if (ctrlc()) { 494 /* cancel any ARP that may not have completed */ 495 NetArpWaitPacketIP = 0; 496 497 net_cleanup_loop(); 498 eth_halt(); 499 /* Invalidate the last protocol */ 500 eth_set_last_protocol(BOOTP); 501 502 puts("\nAbort\n"); 503 /* include a debug print as well incase the debug 504 messages are directed to stderr */ 505 debug_cond(DEBUG_INT_STATE, "--- NetLoop Abort!\n"); 506 goto done; 507 } 508 509 ArpTimeoutCheck(); 510 511 /* 512 * Check for a timeout, and run the timeout handler 513 * if we have one. 514 */ 515 if (timeHandler && ((get_timer(0) - timeStart) > timeDelta)) { 516 thand_f *x; 517 518 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 519 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 520 defined(CONFIG_STATUS_LED) && \ 521 defined(STATUS_LED_RED) 522 /* 523 * Echo the inverted link state to the fault LED. 524 */ 525 if (miiphy_link(eth_get_dev()->name, 526 CONFIG_SYS_FAULT_MII_ADDR)) { 527 status_led_set(STATUS_LED_RED, STATUS_LED_OFF); 528 } else { 529 status_led_set(STATUS_LED_RED, STATUS_LED_ON); 530 } 531 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 532 #endif /* CONFIG_MII, ... */ 533 debug_cond(DEBUG_INT_STATE, "--- NetLoop timeout\n"); 534 x = timeHandler; 535 timeHandler = (thand_f *)0; 536 (*x)(); 537 } 538 539 if (net_state == NETLOOP_FAIL) 540 NetStartAgain(); 541 542 switch (net_state) { 543 544 case NETLOOP_RESTART: 545 NetRestarted = 1; 546 goto restart; 547 548 case NETLOOP_SUCCESS: 549 net_cleanup_loop(); 550 if (NetBootFileXferSize > 0) { 551 printf("Bytes transferred = %ld (%lx hex)\n", 552 NetBootFileXferSize, 553 NetBootFileXferSize); 554 setenv_hex("filesize", NetBootFileXferSize); 555 setenv_hex("fileaddr", load_addr); 556 } 557 if (protocol != NETCONS) 558 eth_halt(); 559 else 560 eth_halt_state_only(); 561 562 eth_set_last_protocol(protocol); 563 564 ret = NetBootFileXferSize; 565 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n"); 566 goto done; 567 568 case NETLOOP_FAIL: 569 net_cleanup_loop(); 570 /* Invalidate the last protocol */ 571 eth_set_last_protocol(BOOTP); 572 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n"); 573 goto done; 574 575 case NETLOOP_CONTINUE: 576 continue; 577 } 578 } 579 580 done: 581 #ifdef CONFIG_USB_KEYBOARD 582 net_busy_flag = 0; 583 #endif 584 #ifdef CONFIG_CMD_TFTPPUT 585 /* Clear out the handlers */ 586 net_set_udp_handler(NULL); 587 net_set_icmp_handler(NULL); 588 #endif 589 return ret; 590 } 591 592 /**********************************************************************/ 593 594 static void 595 startAgainTimeout(void) 596 { 597 net_set_state(NETLOOP_RESTART); 598 } 599 600 void NetStartAgain(void) 601 { 602 char *nretry; 603 int retry_forever = 0; 604 unsigned long retrycnt = 0; 605 606 nretry = getenv("netretry"); 607 if (nretry) { 608 if (!strcmp(nretry, "yes")) 609 retry_forever = 1; 610 else if (!strcmp(nretry, "no")) 611 retrycnt = 0; 612 else if (!strcmp(nretry, "once")) 613 retrycnt = 1; 614 else 615 retrycnt = simple_strtoul(nretry, NULL, 0); 616 } else { 617 retrycnt = 0; 618 retry_forever = 0; 619 } 620 621 if ((!retry_forever) && (NetTryCount >= retrycnt)) { 622 eth_halt(); 623 net_set_state(NETLOOP_FAIL); 624 return; 625 } 626 627 NetTryCount++; 628 629 eth_halt(); 630 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 631 eth_try_another(!NetRestarted); 632 #endif 633 eth_init(); 634 if (NetRestartWrap) { 635 NetRestartWrap = 0; 636 if (NetDevExists) { 637 NetSetTimeout(10000UL, startAgainTimeout); 638 net_set_udp_handler(NULL); 639 } else { 640 net_set_state(NETLOOP_FAIL); 641 } 642 } else { 643 net_set_state(NETLOOP_RESTART); 644 } 645 } 646 647 /**********************************************************************/ 648 /* 649 * Miscelaneous bits. 650 */ 651 652 static void dummy_handler(uchar *pkt, unsigned dport, 653 IPaddr_t sip, unsigned sport, 654 unsigned len) 655 { 656 } 657 658 rxhand_f *net_get_udp_handler(void) 659 { 660 return udp_packet_handler; 661 } 662 663 void net_set_udp_handler(rxhand_f *f) 664 { 665 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f); 666 if (f == NULL) 667 udp_packet_handler = dummy_handler; 668 else 669 udp_packet_handler = f; 670 } 671 672 rxhand_f *net_get_arp_handler(void) 673 { 674 return arp_packet_handler; 675 } 676 677 void net_set_arp_handler(rxhand_f *f) 678 { 679 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f); 680 if (f == NULL) 681 arp_packet_handler = dummy_handler; 682 else 683 arp_packet_handler = f; 684 } 685 686 #ifdef CONFIG_CMD_TFTPPUT 687 void net_set_icmp_handler(rxhand_icmp_f *f) 688 { 689 packet_icmp_handler = f; 690 } 691 #endif 692 693 void 694 NetSetTimeout(ulong iv, thand_f *f) 695 { 696 if (iv == 0) { 697 debug_cond(DEBUG_INT_STATE, 698 "--- NetLoop timeout handler cancelled\n"); 699 timeHandler = (thand_f *)0; 700 } else { 701 debug_cond(DEBUG_INT_STATE, 702 "--- NetLoop timeout handler set (%p)\n", f); 703 timeHandler = f; 704 timeStart = get_timer(0); 705 timeDelta = iv * CONFIG_SYS_HZ / 1000; 706 } 707 } 708 709 int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, 710 int payload_len) 711 { 712 uchar *pkt; 713 int eth_hdr_size; 714 int pkt_hdr_size; 715 716 /* make sure the NetTxPacket is initialized (NetInit() was called) */ 717 assert(NetTxPacket != NULL); 718 if (NetTxPacket == NULL) 719 return -1; 720 721 /* convert to new style broadcast */ 722 if (dest == 0) 723 dest = 0xFFFFFFFF; 724 725 /* if broadcast, make the ether address a broadcast and don't do ARP */ 726 if (dest == 0xFFFFFFFF) 727 ether = NetBcastAddr; 728 729 pkt = (uchar *)NetTxPacket; 730 731 eth_hdr_size = NetSetEther(pkt, ether, PROT_IP); 732 pkt += eth_hdr_size; 733 net_set_udp_header(pkt, dest, dport, sport, payload_len); 734 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE; 735 736 /* if MAC address was not discovered yet, do an ARP request */ 737 if (memcmp(ether, NetEtherNullAddr, 6) == 0) { 738 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest); 739 740 /* save the ip and eth addr for the packet to send after arp */ 741 NetArpWaitPacketIP = dest; 742 NetArpWaitPacketMAC = ether; 743 744 /* size of the waiting packet */ 745 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len; 746 747 /* and do the ARP request */ 748 NetArpWaitTry = 1; 749 NetArpWaitTimerStart = get_timer(0); 750 ArpRequest(); 751 return 1; /* waiting */ 752 } else { 753 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n", 754 &dest, ether); 755 NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len); 756 return 0; /* transmitted */ 757 } 758 } 759 760 #ifdef CONFIG_IP_DEFRAG 761 /* 762 * This function collects fragments in a single packet, according 763 * to the algorithm in RFC815. It returns NULL or the pointer to 764 * a complete packet, in static storage 765 */ 766 #ifndef CONFIG_NET_MAXDEFRAG 767 #define CONFIG_NET_MAXDEFRAG 16384 768 #endif 769 /* 770 * MAXDEFRAG, above, is chosen in the config file and is real data 771 * so we need to add the NFS overhead, which is more than TFTP. 772 * To use sizeof in the internal unnamed structures, we need a real 773 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately). 774 * The compiler doesn't complain nor allocates the actual structure 775 */ 776 static struct rpc_t rpc_specimen; 777 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply)) 778 779 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE) 780 781 /* 782 * this is the packet being assembled, either data or frag control. 783 * Fragments go by 8 bytes, so this union must be 8 bytes long 784 */ 785 struct hole { 786 /* first_byte is address of this structure */ 787 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ 788 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ 789 u16 prev_hole; /* index of prev, 0 == none */ 790 u16 unused; 791 }; 792 793 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp) 794 { 795 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN); 796 static u16 first_hole, total_len; 797 struct hole *payload, *thisfrag, *h, *newh; 798 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff; 799 uchar *indata = (uchar *)ip; 800 int offset8, start, len, done = 0; 801 u16 ip_off = ntohs(ip->ip_off); 802 803 /* payload starts after IP header, this fragment is in there */ 804 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE); 805 offset8 = (ip_off & IP_OFFS); 806 thisfrag = payload + offset8; 807 start = offset8 * 8; 808 len = ntohs(ip->ip_len) - IP_HDR_SIZE; 809 810 if (start + len > IP_MAXUDP) /* fragment extends too far */ 811 return NULL; 812 813 if (!total_len || localip->ip_id != ip->ip_id) { 814 /* new (or different) packet, reset structs */ 815 total_len = 0xffff; 816 payload[0].last_byte = ~0; 817 payload[0].next_hole = 0; 818 payload[0].prev_hole = 0; 819 first_hole = 0; 820 /* any IP header will work, copy the first we received */ 821 memcpy(localip, ip, IP_HDR_SIZE); 822 } 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 */ 830 831 h = payload + first_hole; 832 while (h->last_byte < start) { 833 if (!h->next_hole) { 834 /* no hole that far away */ 835 return NULL; 836 } 837 h = payload + h->next_hole; 838 } 839 840 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ 841 if (offset8 + ((len + 7) / 8) <= h - payload) { 842 /* no overlap with holes (dup fragment?) */ 843 return NULL; 844 } 845 846 if (!(ip_off & IP_FLAGS_MFRAG)) { 847 /* no more fragmentss: truncate this (last) hole */ 848 total_len = start + len; 849 h->last_byte = start + len; 850 } 851 852 /* 853 * There is some overlap: fix the hole list. This code doesn't 854 * deal with a fragment that overlaps with two different holes 855 * (thus being a superset of a previously-received fragment). 856 */ 857 858 if ((h >= thisfrag) && (h->last_byte <= start + len)) { 859 /* complete overlap with hole: remove hole */ 860 if (!h->prev_hole && !h->next_hole) { 861 /* last remaining hole */ 862 done = 1; 863 } else if (!h->prev_hole) { 864 /* first hole */ 865 first_hole = h->next_hole; 866 payload[h->next_hole].prev_hole = 0; 867 } else if (!h->next_hole) { 868 /* last hole */ 869 payload[h->prev_hole].next_hole = 0; 870 } else { 871 /* in the middle of the list */ 872 payload[h->next_hole].prev_hole = h->prev_hole; 873 payload[h->prev_hole].next_hole = h->next_hole; 874 } 875 876 } else if (h->last_byte <= start + len) { 877 /* overlaps with final part of the hole: shorten this hole */ 878 h->last_byte = start; 879 880 } else if (h >= thisfrag) { 881 /* overlaps with initial part of the hole: move this hole */ 882 newh = thisfrag + (len / 8); 883 *newh = *h; 884 h = newh; 885 if (h->next_hole) 886 payload[h->next_hole].prev_hole = (h - payload); 887 if (h->prev_hole) 888 payload[h->prev_hole].next_hole = (h - payload); 889 else 890 first_hole = (h - payload); 891 892 } else { 893 /* fragment sits in the middle: split the hole */ 894 newh = thisfrag + (len / 8); 895 *newh = *h; 896 h->last_byte = start; 897 h->next_hole = (newh - payload); 898 newh->prev_hole = (h - payload); 899 if (newh->next_hole) 900 payload[newh->next_hole].prev_hole = (newh - payload); 901 } 902 903 /* finally copy this fragment and possibly return whole packet */ 904 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len); 905 if (!done) 906 return NULL; 907 908 localip->ip_len = htons(total_len); 909 *lenp = total_len + IP_HDR_SIZE; 910 return localip; 911 } 912 913 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) 914 { 915 u16 ip_off = ntohs(ip->ip_off); 916 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 917 return ip; /* not a fragment */ 918 return __NetDefragment(ip, lenp); 919 } 920 921 #else /* !CONFIG_IP_DEFRAG */ 922 923 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) 924 { 925 u16 ip_off = ntohs(ip->ip_off); 926 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 927 return ip; /* not a fragment */ 928 return NULL; 929 } 930 #endif 931 932 /** 933 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently 934 * drop others. 935 * 936 * @parma ip IP packet containing the ICMP 937 */ 938 static void receive_icmp(struct ip_udp_hdr *ip, int len, 939 IPaddr_t src_ip, struct ethernet_hdr *et) 940 { 941 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src; 942 943 switch (icmph->type) { 944 case ICMP_REDIRECT: 945 if (icmph->code != ICMP_REDIR_HOST) 946 return; 947 printf(" ICMP Host Redirect to %pI4 ", 948 &icmph->un.gateway); 949 break; 950 default: 951 #if defined(CONFIG_CMD_PING) 952 ping_receive(et, ip, len); 953 #endif 954 #ifdef CONFIG_CMD_TFTPPUT 955 if (packet_icmp_handler) 956 packet_icmp_handler(icmph->type, icmph->code, 957 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src), 958 icmph->un.data, ntohs(ip->udp_len)); 959 #endif 960 break; 961 } 962 } 963 964 void net_process_received_packet(uchar *in_packet, int len) 965 { 966 struct ethernet_hdr *et; 967 struct ip_udp_hdr *ip; 968 IPaddr_t dst_ip; 969 IPaddr_t src_ip; 970 int eth_proto; 971 #if defined(CONFIG_CMD_CDP) 972 int iscdp; 973 #endif 974 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 975 976 debug_cond(DEBUG_NET_PKT, "packet received\n"); 977 978 NetRxPacket = in_packet; 979 NetRxPacketLen = len; 980 et = (struct ethernet_hdr *)in_packet; 981 982 /* too small packet? */ 983 if (len < ETHER_HDR_SIZE) 984 return; 985 986 #ifdef CONFIG_API 987 if (push_packet) { 988 (*push_packet)(in_packet, len); 989 return; 990 } 991 #endif 992 993 #if defined(CONFIG_CMD_CDP) 994 /* keep track if packet is CDP */ 995 iscdp = is_cdp_packet(et->et_dest); 996 #endif 997 998 myvlanid = ntohs(NetOurVLAN); 999 if (myvlanid == (ushort)-1) 1000 myvlanid = VLAN_NONE; 1001 mynvlanid = ntohs(NetOurNativeVLAN); 1002 if (mynvlanid == (ushort)-1) 1003 mynvlanid = VLAN_NONE; 1004 1005 eth_proto = ntohs(et->et_protlen); 1006 1007 if (eth_proto < 1514) { 1008 struct e802_hdr *et802 = (struct e802_hdr *)et; 1009 /* 1010 * Got a 802.2 packet. Check the other protocol field. 1011 * XXX VLAN over 802.2+SNAP not implemented! 1012 */ 1013 eth_proto = ntohs(et802->et_prot); 1014 1015 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE); 1016 len -= E802_HDR_SIZE; 1017 1018 } else if (eth_proto != PROT_VLAN) { /* normal packet */ 1019 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE); 1020 len -= ETHER_HDR_SIZE; 1021 1022 } else { /* VLAN packet */ 1023 struct vlan_ethernet_hdr *vet = 1024 (struct vlan_ethernet_hdr *)et; 1025 1026 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n"); 1027 1028 /* too small packet? */ 1029 if (len < VLAN_ETHER_HDR_SIZE) 1030 return; 1031 1032 /* if no VLAN active */ 1033 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1034 #if defined(CONFIG_CMD_CDP) 1035 && iscdp == 0 1036 #endif 1037 ) 1038 return; 1039 1040 cti = ntohs(vet->vet_tag); 1041 vlanid = cti & VLAN_IDMASK; 1042 eth_proto = ntohs(vet->vet_type); 1043 1044 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE); 1045 len -= VLAN_ETHER_HDR_SIZE; 1046 } 1047 1048 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto); 1049 1050 #if defined(CONFIG_CMD_CDP) 1051 if (iscdp) { 1052 cdp_receive((uchar *)ip, len); 1053 return; 1054 } 1055 #endif 1056 1057 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1058 if (vlanid == VLAN_NONE) 1059 vlanid = (mynvlanid & VLAN_IDMASK); 1060 /* not matched? */ 1061 if (vlanid != (myvlanid & VLAN_IDMASK)) 1062 return; 1063 } 1064 1065 switch (eth_proto) { 1066 1067 case PROT_ARP: 1068 ArpReceive(et, ip, len); 1069 break; 1070 1071 #ifdef CONFIG_CMD_RARP 1072 case PROT_RARP: 1073 rarp_receive(ip, len); 1074 break; 1075 #endif 1076 case PROT_IP: 1077 debug_cond(DEBUG_NET_PKT, "Got IP\n"); 1078 /* Before we start poking the header, make sure it is there */ 1079 if (len < IP_UDP_HDR_SIZE) { 1080 debug("len bad %d < %lu\n", len, 1081 (ulong)IP_UDP_HDR_SIZE); 1082 return; 1083 } 1084 /* Check the packet length */ 1085 if (len < ntohs(ip->ip_len)) { 1086 debug("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1087 return; 1088 } 1089 len = ntohs(ip->ip_len); 1090 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n", 1091 len, ip->ip_hl_v & 0xff); 1092 1093 /* Can't deal with anything except IPv4 */ 1094 if ((ip->ip_hl_v & 0xf0) != 0x40) 1095 return; 1096 /* Can't deal with IP options (headers != 20 bytes) */ 1097 if ((ip->ip_hl_v & 0x0f) > 0x05) 1098 return; 1099 /* Check the Checksum of the header */ 1100 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) { 1101 debug("checksum bad\n"); 1102 return; 1103 } 1104 /* If it is not for us, ignore it */ 1105 dst_ip = NetReadIP(&ip->ip_dst); 1106 if (NetOurIP && dst_ip != NetOurIP && dst_ip != 0xFFFFFFFF) { 1107 #ifdef CONFIG_MCAST_TFTP 1108 if (Mcast_addr != dst_ip) 1109 #endif 1110 return; 1111 } 1112 /* Read source IP address for later use */ 1113 src_ip = NetReadIP(&ip->ip_src); 1114 /* 1115 * The function returns the unchanged packet if it's not 1116 * a fragment, and either the complete packet or NULL if 1117 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) 1118 */ 1119 ip = NetDefragment(ip, &len); 1120 if (!ip) 1121 return; 1122 /* 1123 * watch for ICMP host redirects 1124 * 1125 * There is no real handler code (yet). We just watch 1126 * for ICMP host redirect messages. In case anybody 1127 * sees these messages: please contact me 1128 * (wd@denx.de), or - even better - send me the 1129 * necessary fixes :-) 1130 * 1131 * Note: in all cases where I have seen this so far 1132 * it was a problem with the router configuration, 1133 * for instance when a router was configured in the 1134 * BOOTP reply, but the TFTP server was on the same 1135 * subnet. So this is probably a warning that your 1136 * configuration might be wrong. But I'm not really 1137 * sure if there aren't any other situations. 1138 * 1139 * Simon Glass <sjg@chromium.org>: We get an ICMP when 1140 * we send a tftp packet to a dead connection, or when 1141 * there is no server at the other end. 1142 */ 1143 if (ip->ip_p == IPPROTO_ICMP) { 1144 receive_icmp(ip, len, src_ip, et); 1145 return; 1146 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1147 return; 1148 } 1149 1150 debug_cond(DEBUG_DEV_PKT, 1151 "received UDP (to=%pI4, from=%pI4, len=%d)\n", 1152 &dst_ip, &src_ip, len); 1153 1154 #ifdef CONFIG_UDP_CHECKSUM 1155 if (ip->udp_xsum != 0) { 1156 ulong xsum; 1157 ushort *sumptr; 1158 ushort sumlen; 1159 1160 xsum = ip->ip_p; 1161 xsum += (ntohs(ip->udp_len)); 1162 xsum += (ntohl(ip->ip_src) >> 16) & 0x0000ffff; 1163 xsum += (ntohl(ip->ip_src) >> 0) & 0x0000ffff; 1164 xsum += (ntohl(ip->ip_dst) >> 16) & 0x0000ffff; 1165 xsum += (ntohl(ip->ip_dst) >> 0) & 0x0000ffff; 1166 1167 sumlen = ntohs(ip->udp_len); 1168 sumptr = (ushort *) &(ip->udp_src); 1169 1170 while (sumlen > 1) { 1171 ushort sumdata; 1172 1173 sumdata = *sumptr++; 1174 xsum += ntohs(sumdata); 1175 sumlen -= 2; 1176 } 1177 if (sumlen > 0) { 1178 ushort sumdata; 1179 1180 sumdata = *(unsigned char *) sumptr; 1181 sumdata = (sumdata << 8) & 0xff00; 1182 xsum += sumdata; 1183 } 1184 while ((xsum >> 16) != 0) { 1185 xsum = (xsum & 0x0000ffff) + 1186 ((xsum >> 16) & 0x0000ffff); 1187 } 1188 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1189 printf(" UDP wrong checksum %08lx %08x\n", 1190 xsum, ntohs(ip->udp_xsum)); 1191 return; 1192 } 1193 } 1194 #endif 1195 1196 1197 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD) 1198 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE, 1199 src_ip, 1200 ntohs(ip->udp_dst), 1201 ntohs(ip->udp_src), 1202 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1203 #endif 1204 /* 1205 * IP header OK. Pass the packet to the current handler. 1206 */ 1207 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE, 1208 ntohs(ip->udp_dst), 1209 src_ip, 1210 ntohs(ip->udp_src), 1211 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1212 break; 1213 } 1214 } 1215 1216 1217 /**********************************************************************/ 1218 1219 static int net_check_prereq(enum proto_t protocol) 1220 { 1221 switch (protocol) { 1222 /* Fall through */ 1223 #if defined(CONFIG_CMD_PING) 1224 case PING: 1225 if (NetPingIP == 0) { 1226 puts("*** ERROR: ping address not given\n"); 1227 return 1; 1228 } 1229 goto common; 1230 #endif 1231 #if defined(CONFIG_CMD_SNTP) 1232 case SNTP: 1233 if (NetNtpServerIP == 0) { 1234 puts("*** ERROR: NTP server address not given\n"); 1235 return 1; 1236 } 1237 goto common; 1238 #endif 1239 #if defined(CONFIG_CMD_DNS) 1240 case DNS: 1241 if (NetOurDNSIP == 0) { 1242 puts("*** ERROR: DNS server address not given\n"); 1243 return 1; 1244 } 1245 goto common; 1246 #endif 1247 #if defined(CONFIG_CMD_NFS) 1248 case NFS: 1249 #endif 1250 case TFTPGET: 1251 case TFTPPUT: 1252 if (NetServerIP == 0) { 1253 puts("*** ERROR: `serverip' not set\n"); 1254 return 1; 1255 } 1256 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ 1257 defined(CONFIG_CMD_DNS) 1258 common: 1259 #endif 1260 /* Fall through */ 1261 1262 case NETCONS: 1263 case TFTPSRV: 1264 if (NetOurIP == 0) { 1265 puts("*** ERROR: `ipaddr' not set\n"); 1266 return 1; 1267 } 1268 /* Fall through */ 1269 1270 #ifdef CONFIG_CMD_RARP 1271 case RARP: 1272 #endif 1273 case BOOTP: 1274 case CDP: 1275 case DHCP: 1276 case LINKLOCAL: 1277 if (memcmp(NetOurEther, "\0\0\0\0\0\0", 6) == 0) { 1278 int num = eth_get_dev_index(); 1279 1280 switch (num) { 1281 case -1: 1282 puts("*** ERROR: No ethernet found.\n"); 1283 return 1; 1284 case 0: 1285 puts("*** ERROR: `ethaddr' not set\n"); 1286 break; 1287 default: 1288 printf("*** ERROR: `eth%daddr' not set\n", 1289 num); 1290 break; 1291 } 1292 1293 NetStartAgain(); 1294 return 2; 1295 } 1296 /* Fall through */ 1297 default: 1298 return 0; 1299 } 1300 return 0; /* OK */ 1301 } 1302 /**********************************************************************/ 1303 1304 int 1305 NetEthHdrSize(void) 1306 { 1307 ushort myvlanid; 1308 1309 myvlanid = ntohs(NetOurVLAN); 1310 if (myvlanid == (ushort)-1) 1311 myvlanid = VLAN_NONE; 1312 1313 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : 1314 VLAN_ETHER_HDR_SIZE; 1315 } 1316 1317 int 1318 NetSetEther(uchar *xet, uchar * addr, uint prot) 1319 { 1320 struct ethernet_hdr *et = (struct ethernet_hdr *)xet; 1321 ushort myvlanid; 1322 1323 myvlanid = ntohs(NetOurVLAN); 1324 if (myvlanid == (ushort)-1) 1325 myvlanid = VLAN_NONE; 1326 1327 memcpy(et->et_dest, addr, 6); 1328 memcpy(et->et_src, NetOurEther, 6); 1329 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1330 et->et_protlen = htons(prot); 1331 return ETHER_HDR_SIZE; 1332 } else { 1333 struct vlan_ethernet_hdr *vet = 1334 (struct vlan_ethernet_hdr *)xet; 1335 1336 vet->vet_vlan_type = htons(PROT_VLAN); 1337 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1338 vet->vet_type = htons(prot); 1339 return VLAN_ETHER_HDR_SIZE; 1340 } 1341 } 1342 1343 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot) 1344 { 1345 ushort protlen; 1346 1347 memcpy(et->et_dest, addr, 6); 1348 memcpy(et->et_src, NetOurEther, 6); 1349 protlen = ntohs(et->et_protlen); 1350 if (protlen == PROT_VLAN) { 1351 struct vlan_ethernet_hdr *vet = 1352 (struct vlan_ethernet_hdr *)et; 1353 vet->vet_type = htons(prot); 1354 return VLAN_ETHER_HDR_SIZE; 1355 } else if (protlen > 1514) { 1356 et->et_protlen = htons(prot); 1357 return ETHER_HDR_SIZE; 1358 } else { 1359 /* 802.2 + SNAP */ 1360 struct e802_hdr *et802 = (struct e802_hdr *)et; 1361 et802->et_prot = htons(prot); 1362 return E802_HDR_SIZE; 1363 } 1364 } 1365 1366 void net_set_ip_header(uchar *pkt, IPaddr_t dest, IPaddr_t source) 1367 { 1368 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1369 1370 /* 1371 * Construct an IP header. 1372 */ 1373 /* IP_HDR_SIZE / 4 (not including UDP) */ 1374 ip->ip_hl_v = 0x45; 1375 ip->ip_tos = 0; 1376 ip->ip_len = htons(IP_HDR_SIZE); 1377 ip->ip_id = htons(NetIPID++); 1378 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1379 ip->ip_ttl = 255; 1380 ip->ip_sum = 0; 1381 /* already in network byte order */ 1382 NetCopyIP((void *)&ip->ip_src, &source); 1383 /* already in network byte order */ 1384 NetCopyIP((void *)&ip->ip_dst, &dest); 1385 } 1386 1387 void net_set_udp_header(uchar *pkt, IPaddr_t dest, int dport, int sport, 1388 int len) 1389 { 1390 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1391 1392 /* 1393 * If the data is an odd number of bytes, zero the 1394 * byte after the last byte so that the checksum 1395 * will work. 1396 */ 1397 if (len & 1) 1398 pkt[IP_UDP_HDR_SIZE + len] = 0; 1399 1400 net_set_ip_header(pkt, dest, NetOurIP); 1401 ip->ip_len = htons(IP_UDP_HDR_SIZE + len); 1402 ip->ip_p = IPPROTO_UDP; 1403 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE); 1404 1405 ip->udp_src = htons(sport); 1406 ip->udp_dst = htons(dport); 1407 ip->udp_len = htons(UDP_HDR_SIZE + len); 1408 ip->udp_xsum = 0; 1409 } 1410 1411 void copy_filename(char *dst, const char *src, int size) 1412 { 1413 if (*src && (*src == '"')) { 1414 ++src; 1415 --size; 1416 } 1417 1418 while ((--size > 0) && *src && (*src != '"')) 1419 *dst++ = *src++; 1420 *dst = '\0'; 1421 } 1422 1423 #if defined(CONFIG_CMD_NFS) || \ 1424 defined(CONFIG_CMD_SNTP) || \ 1425 defined(CONFIG_CMD_DNS) 1426 /* 1427 * make port a little random (1024-17407) 1428 * This keeps the math somewhat trivial to compute, and seems to work with 1429 * all supported protocols/clients/servers 1430 */ 1431 unsigned int random_port(void) 1432 { 1433 return 1024 + (get_timer(0) % 0x4000); 1434 } 1435 #endif 1436 1437 void ip_to_string(IPaddr_t x, char *s) 1438 { 1439 x = ntohl(x); 1440 sprintf(s, "%d.%d.%d.%d", 1441 (int) ((x >> 24) & 0xff), 1442 (int) ((x >> 16) & 0xff), 1443 (int) ((x >> 8) & 0xff), (int) ((x >> 0) & 0xff) 1444 ); 1445 } 1446 1447 void VLAN_to_string(ushort x, char *s) 1448 { 1449 x = ntohs(x); 1450 1451 if (x == (ushort)-1) 1452 x = VLAN_NONE; 1453 1454 if (x == VLAN_NONE) 1455 strcpy(s, "none"); 1456 else 1457 sprintf(s, "%d", x & VLAN_IDMASK); 1458 } 1459 1460 ushort string_to_VLAN(const char *s) 1461 { 1462 ushort id; 1463 1464 if (s == NULL) 1465 return htons(VLAN_NONE); 1466 1467 if (*s < '0' || *s > '9') 1468 id = VLAN_NONE; 1469 else 1470 id = (ushort)simple_strtoul(s, NULL, 10); 1471 1472 return htons(id); 1473 } 1474 1475 ushort getenv_VLAN(char *var) 1476 { 1477 return string_to_VLAN(getenv(var)); 1478 } 1479