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