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 #ifdef CONFIG_DM_ETH 182 /* Receive packets */ 183 uchar *net_rx_packets[PKTBUFSRX]; 184 #else 185 /* Receive packet */ 186 uchar *NetRxPackets[PKTBUFSRX]; 187 #endif 188 /* Current UDP RX packet handler */ 189 static rxhand_f *udp_packet_handler; 190 /* Current ARP RX packet handler */ 191 static rxhand_f *arp_packet_handler; 192 #ifdef CONFIG_CMD_TFTPPUT 193 /* Current ICMP rx handler */ 194 static rxhand_icmp_f *packet_icmp_handler; 195 #endif 196 /* Current timeout handler */ 197 static thand_f *timeHandler; 198 /* Time base value */ 199 static ulong timeStart; 200 /* Current timeout value */ 201 static ulong timeDelta; 202 /* THE transmit packet */ 203 uchar *net_tx_packet; 204 205 static int net_check_prereq(enum proto_t protocol); 206 207 static int NetTryCount; 208 209 int __maybe_unused net_busy_flag; 210 211 /**********************************************************************/ 212 213 static int on_bootfile(const char *name, const char *value, enum env_op op, 214 int flags) 215 { 216 switch (op) { 217 case env_op_create: 218 case env_op_overwrite: 219 copy_filename(net_boot_file_name, value, 220 sizeof(net_boot_file_name)); 221 break; 222 default: 223 break; 224 } 225 226 return 0; 227 } 228 U_BOOT_ENV_CALLBACK(bootfile, on_bootfile); 229 230 /* 231 * Check if autoload is enabled. If so, use either NFS or TFTP to download 232 * the boot file. 233 */ 234 void net_auto_load(void) 235 { 236 #if defined(CONFIG_CMD_NFS) 237 const char *s = getenv("autoload"); 238 239 if (s != NULL && strcmp(s, "NFS") == 0) { 240 /* 241 * Use NFS to load the bootfile. 242 */ 243 NfsStart(); 244 return; 245 } 246 #endif 247 if (getenv_yesno("autoload") == 0) { 248 /* 249 * Just use BOOTP/RARP to configure system; 250 * Do not use TFTP to load the bootfile. 251 */ 252 net_set_state(NETLOOP_SUCCESS); 253 return; 254 } 255 TftpStart(TFTPGET); 256 } 257 258 static void NetInitLoop(void) 259 { 260 static int env_changed_id; 261 int env_id = get_env_id(); 262 263 /* update only when the environment has changed */ 264 if (env_changed_id != env_id) { 265 net_ip = getenv_ip("ipaddr"); 266 net_gateway = getenv_ip("gatewayip"); 267 net_netmask = getenv_ip("netmask"); 268 net_server_ip = getenv_ip("serverip"); 269 NetOurNativeVLAN = getenv_VLAN("nvlan"); 270 NetOurVLAN = getenv_VLAN("vlan"); 271 #if defined(CONFIG_CMD_DNS) 272 net_dns_server = getenv_ip("dnsip"); 273 #endif 274 env_changed_id = env_id; 275 } 276 if (eth_get_dev()) 277 memcpy(net_ethaddr, eth_get_ethaddr(), 6); 278 279 return; 280 } 281 282 static void net_clear_handlers(void) 283 { 284 net_set_udp_handler(NULL); 285 net_set_arp_handler(NULL); 286 NetSetTimeout(0, NULL); 287 } 288 289 static void net_cleanup_loop(void) 290 { 291 net_clear_handlers(); 292 } 293 294 void net_init(void) 295 { 296 static int first_call = 1; 297 298 if (first_call) { 299 /* 300 * Setup packet buffers, aligned correctly. 301 */ 302 int i; 303 304 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1); 305 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN; 306 #ifdef CONFIG_DM_ETH 307 for (i = 0; i < PKTBUFSRX; i++) { 308 net_rx_packets[i] = net_tx_packet + 309 (i + 1) * PKTSIZE_ALIGN; 310 } 311 #else 312 for (i = 0; i < PKTBUFSRX; i++) 313 NetRxPackets[i] = net_tx_packet + 314 (i + 1) * PKTSIZE_ALIGN; 315 #endif 316 ArpInit(); 317 net_clear_handlers(); 318 319 /* Only need to setup buffer pointers once. */ 320 first_call = 0; 321 } 322 323 NetInitLoop(); 324 } 325 326 /**********************************************************************/ 327 /* 328 * Main network processing loop. 329 */ 330 331 int NetLoop(enum proto_t protocol) 332 { 333 int ret = -EINVAL; 334 335 NetRestarted = 0; 336 NetDevExists = 0; 337 NetTryCount = 1; 338 debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n"); 339 340 bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start"); 341 net_init(); 342 if (eth_is_on_demand_init() || protocol != NETCONS) { 343 eth_halt(); 344 eth_set_current(); 345 ret = eth_init(); 346 if (ret < 0) { 347 eth_halt(); 348 return ret; 349 } 350 } else 351 eth_init_state_only(); 352 353 restart: 354 #ifdef CONFIG_USB_KEYBOARD 355 net_busy_flag = 0; 356 #endif 357 net_set_state(NETLOOP_CONTINUE); 358 359 /* 360 * Start the ball rolling with the given start function. From 361 * here on, this code is a state machine driven by received 362 * packets and timer events. 363 */ 364 debug_cond(DEBUG_INT_STATE, "--- NetLoop Init\n"); 365 NetInitLoop(); 366 367 switch (net_check_prereq(protocol)) { 368 case 1: 369 /* network not configured */ 370 eth_halt(); 371 return -ENODEV; 372 373 case 2: 374 /* network device not configured */ 375 break; 376 377 case 0: 378 NetDevExists = 1; 379 net_boot_file_size = 0; 380 switch (protocol) { 381 case TFTPGET: 382 #ifdef CONFIG_CMD_TFTPPUT 383 case TFTPPUT: 384 #endif 385 /* always use ARP to get server ethernet address */ 386 TftpStart(protocol); 387 break; 388 #ifdef CONFIG_CMD_TFTPSRV 389 case TFTPSRV: 390 TftpStartServer(); 391 break; 392 #endif 393 #if defined(CONFIG_CMD_DHCP) 394 case DHCP: 395 BootpReset(); 396 net_ip.s_addr = 0; 397 DhcpRequest(); /* Basically same as BOOTP */ 398 break; 399 #endif 400 401 case BOOTP: 402 BootpReset(); 403 net_ip.s_addr = 0; 404 BootpRequest(); 405 break; 406 407 #if defined(CONFIG_CMD_RARP) 408 case RARP: 409 RarpTry = 0; 410 net_ip.s_addr = 0; 411 RarpRequest(); 412 break; 413 #endif 414 #if defined(CONFIG_CMD_PING) 415 case PING: 416 ping_start(); 417 break; 418 #endif 419 #if defined(CONFIG_CMD_NFS) 420 case NFS: 421 NfsStart(); 422 break; 423 #endif 424 #if defined(CONFIG_CMD_CDP) 425 case CDP: 426 CDPStart(); 427 break; 428 #endif 429 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD) 430 case NETCONS: 431 NcStart(); 432 break; 433 #endif 434 #if defined(CONFIG_CMD_SNTP) 435 case SNTP: 436 SntpStart(); 437 break; 438 #endif 439 #if defined(CONFIG_CMD_DNS) 440 case DNS: 441 DnsStart(); 442 break; 443 #endif 444 #if defined(CONFIG_CMD_LINK_LOCAL) 445 case LINKLOCAL: 446 link_local_start(); 447 break; 448 #endif 449 default: 450 break; 451 } 452 453 break; 454 } 455 456 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 457 #if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN) && \ 458 defined(CONFIG_STATUS_LED) && \ 459 defined(STATUS_LED_RED) 460 /* 461 * Echo the inverted link state to the fault LED. 462 */ 463 if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR)) 464 status_led_set(STATUS_LED_RED, STATUS_LED_OFF); 465 else 466 status_led_set(STATUS_LED_RED, STATUS_LED_ON); 467 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */ 468 #endif /* CONFIG_MII, ... */ 469 #ifdef CONFIG_USB_KEYBOARD 470 net_busy_flag = 1; 471 #endif 472 473 /* 474 * Main packet reception loop. Loop receiving packets until 475 * someone sets `net_state' to a state that terminates. 476 */ 477 for (;;) { 478 WATCHDOG_RESET(); 479 #ifdef CONFIG_SHOW_ACTIVITY 480 show_activity(1); 481 #endif 482 /* 483 * Check the ethernet for a new packet. The ethernet 484 * receive routine will process it. 485 * Most drivers return the most recent packet size, but not 486 * errors that may have happened. 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 net_arp_wait_packet_ip.s_addr = 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 ret = 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 (net_boot_file_size > 0) { 551 printf("Bytes transferred = %d (%x hex)\n", 552 net_boot_file_size, net_boot_file_size); 553 setenv_hex("filesize", net_boot_file_size); 554 setenv_hex("fileaddr", load_addr); 555 } 556 if (protocol != NETCONS) 557 eth_halt(); 558 else 559 eth_halt_state_only(); 560 561 eth_set_last_protocol(protocol); 562 563 ret = net_boot_file_size; 564 debug_cond(DEBUG_INT_STATE, "--- NetLoop Success!\n"); 565 goto done; 566 567 case NETLOOP_FAIL: 568 net_cleanup_loop(); 569 /* Invalidate the last protocol */ 570 eth_set_last_protocol(BOOTP); 571 debug_cond(DEBUG_INT_STATE, "--- NetLoop Fail!\n"); 572 goto done; 573 574 case NETLOOP_CONTINUE: 575 continue; 576 } 577 } 578 579 done: 580 #ifdef CONFIG_USB_KEYBOARD 581 net_busy_flag = 0; 582 #endif 583 #ifdef CONFIG_CMD_TFTPPUT 584 /* Clear out the handlers */ 585 net_set_udp_handler(NULL); 586 net_set_icmp_handler(NULL); 587 #endif 588 return ret; 589 } 590 591 /**********************************************************************/ 592 593 static void 594 startAgainTimeout(void) 595 { 596 net_set_state(NETLOOP_RESTART); 597 } 598 599 int NetStartAgain(void) 600 { 601 char *nretry; 602 int retry_forever = 0; 603 unsigned long retrycnt = 0; 604 int ret; 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 /* 625 * We don't provide a way for the protocol to return an error, 626 * but this is almost always the reason. 627 */ 628 return -ETIMEDOUT; 629 } 630 631 NetTryCount++; 632 633 eth_halt(); 634 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER) 635 eth_try_another(!NetRestarted); 636 #endif 637 ret = eth_init(); 638 if (NetRestartWrap) { 639 NetRestartWrap = 0; 640 if (NetDevExists) { 641 NetSetTimeout(10000UL, startAgainTimeout); 642 net_set_udp_handler(NULL); 643 } else { 644 net_set_state(NETLOOP_FAIL); 645 } 646 } else { 647 net_set_state(NETLOOP_RESTART); 648 } 649 return ret; 650 } 651 652 /**********************************************************************/ 653 /* 654 * Miscelaneous bits. 655 */ 656 657 static void dummy_handler(uchar *pkt, unsigned dport, 658 struct in_addr sip, unsigned sport, 659 unsigned len) 660 { 661 } 662 663 rxhand_f *net_get_udp_handler(void) 664 { 665 return udp_packet_handler; 666 } 667 668 void net_set_udp_handler(rxhand_f *f) 669 { 670 debug_cond(DEBUG_INT_STATE, "--- NetLoop UDP handler set (%p)\n", f); 671 if (f == NULL) 672 udp_packet_handler = dummy_handler; 673 else 674 udp_packet_handler = f; 675 } 676 677 rxhand_f *net_get_arp_handler(void) 678 { 679 return arp_packet_handler; 680 } 681 682 void net_set_arp_handler(rxhand_f *f) 683 { 684 debug_cond(DEBUG_INT_STATE, "--- NetLoop ARP handler set (%p)\n", f); 685 if (f == NULL) 686 arp_packet_handler = dummy_handler; 687 else 688 arp_packet_handler = f; 689 } 690 691 #ifdef CONFIG_CMD_TFTPPUT 692 void net_set_icmp_handler(rxhand_icmp_f *f) 693 { 694 packet_icmp_handler = f; 695 } 696 #endif 697 698 void 699 NetSetTimeout(ulong iv, thand_f *f) 700 { 701 if (iv == 0) { 702 debug_cond(DEBUG_INT_STATE, 703 "--- NetLoop timeout handler cancelled\n"); 704 timeHandler = (thand_f *)0; 705 } else { 706 debug_cond(DEBUG_INT_STATE, 707 "--- NetLoop timeout handler set (%p)\n", f); 708 timeHandler = f; 709 timeStart = get_timer(0); 710 timeDelta = iv * CONFIG_SYS_HZ / 1000; 711 } 712 } 713 714 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport, 715 int payload_len) 716 { 717 uchar *pkt; 718 int eth_hdr_size; 719 int pkt_hdr_size; 720 721 /* make sure the net_tx_packet is initialized (NetInit() was called) */ 722 assert(net_tx_packet != NULL); 723 if (net_tx_packet == NULL) 724 return -1; 725 726 /* convert to new style broadcast */ 727 if (dest.s_addr == 0) 728 dest.s_addr = 0xFFFFFFFF; 729 730 /* if broadcast, make the ether address a broadcast and don't do ARP */ 731 if (dest.s_addr == 0xFFFFFFFF) 732 ether = (uchar *)net_bcast_ethaddr; 733 734 pkt = (uchar *)net_tx_packet; 735 736 eth_hdr_size = net_set_ether(pkt, ether, PROT_IP); 737 pkt += eth_hdr_size; 738 net_set_udp_header(pkt, dest, dport, sport, payload_len); 739 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE; 740 741 /* if MAC address was not discovered yet, do an ARP request */ 742 if (memcmp(ether, net_null_ethaddr, 6) == 0) { 743 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest); 744 745 /* save the ip and eth addr for the packet to send after arp */ 746 net_arp_wait_packet_ip = dest; 747 NetArpWaitPacketMAC = ether; 748 749 /* size of the waiting packet */ 750 NetArpWaitTxPacketSize = pkt_hdr_size + payload_len; 751 752 /* and do the ARP request */ 753 NetArpWaitTry = 1; 754 NetArpWaitTimerStart = get_timer(0); 755 ArpRequest(); 756 return 1; /* waiting */ 757 } else { 758 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n", 759 &dest, ether); 760 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len); 761 return 0; /* transmitted */ 762 } 763 } 764 765 #ifdef CONFIG_IP_DEFRAG 766 /* 767 * This function collects fragments in a single packet, according 768 * to the algorithm in RFC815. It returns NULL or the pointer to 769 * a complete packet, in static storage 770 */ 771 #ifndef CONFIG_NET_MAXDEFRAG 772 #define CONFIG_NET_MAXDEFRAG 16384 773 #endif 774 /* 775 * MAXDEFRAG, above, is chosen in the config file and is real data 776 * so we need to add the NFS overhead, which is more than TFTP. 777 * To use sizeof in the internal unnamed structures, we need a real 778 * instance (can't do "sizeof(struct rpc_t.u.reply))", unfortunately). 779 * The compiler doesn't complain nor allocates the actual structure 780 */ 781 static struct rpc_t rpc_specimen; 782 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply)) 783 784 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE) 785 786 /* 787 * this is the packet being assembled, either data or frag control. 788 * Fragments go by 8 bytes, so this union must be 8 bytes long 789 */ 790 struct hole { 791 /* first_byte is address of this structure */ 792 u16 last_byte; /* last byte in this hole + 1 (begin of next hole) */ 793 u16 next_hole; /* index of next (in 8-b blocks), 0 == none */ 794 u16 prev_hole; /* index of prev, 0 == none */ 795 u16 unused; 796 }; 797 798 static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp) 799 { 800 static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN); 801 static u16 first_hole, total_len; 802 struct hole *payload, *thisfrag, *h, *newh; 803 struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff; 804 uchar *indata = (uchar *)ip; 805 int offset8, start, len, done = 0; 806 u16 ip_off = ntohs(ip->ip_off); 807 808 /* payload starts after IP header, this fragment is in there */ 809 payload = (struct hole *)(pkt_buff + IP_HDR_SIZE); 810 offset8 = (ip_off & IP_OFFS); 811 thisfrag = payload + offset8; 812 start = offset8 * 8; 813 len = ntohs(ip->ip_len) - IP_HDR_SIZE; 814 815 if (start + len > IP_MAXUDP) /* fragment extends too far */ 816 return NULL; 817 818 if (!total_len || localip->ip_id != ip->ip_id) { 819 /* new (or different) packet, reset structs */ 820 total_len = 0xffff; 821 payload[0].last_byte = ~0; 822 payload[0].next_hole = 0; 823 payload[0].prev_hole = 0; 824 first_hole = 0; 825 /* any IP header will work, copy the first we received */ 826 memcpy(localip, ip, IP_HDR_SIZE); 827 } 828 829 /* 830 * What follows is the reassembly algorithm. We use the payload 831 * array as a linked list of hole descriptors, as each hole starts 832 * at a multiple of 8 bytes. However, last byte can be whatever value, 833 * so it is represented as byte count, not as 8-byte blocks. 834 */ 835 836 h = payload + first_hole; 837 while (h->last_byte < start) { 838 if (!h->next_hole) { 839 /* no hole that far away */ 840 return NULL; 841 } 842 h = payload + h->next_hole; 843 } 844 845 /* last fragment may be 1..7 bytes, the "+7" forces acceptance */ 846 if (offset8 + ((len + 7) / 8) <= h - payload) { 847 /* no overlap with holes (dup fragment?) */ 848 return NULL; 849 } 850 851 if (!(ip_off & IP_FLAGS_MFRAG)) { 852 /* no more fragmentss: truncate this (last) hole */ 853 total_len = start + len; 854 h->last_byte = start + len; 855 } 856 857 /* 858 * There is some overlap: fix the hole list. This code doesn't 859 * deal with a fragment that overlaps with two different holes 860 * (thus being a superset of a previously-received fragment). 861 */ 862 863 if ((h >= thisfrag) && (h->last_byte <= start + len)) { 864 /* complete overlap with hole: remove hole */ 865 if (!h->prev_hole && !h->next_hole) { 866 /* last remaining hole */ 867 done = 1; 868 } else if (!h->prev_hole) { 869 /* first hole */ 870 first_hole = h->next_hole; 871 payload[h->next_hole].prev_hole = 0; 872 } else if (!h->next_hole) { 873 /* last hole */ 874 payload[h->prev_hole].next_hole = 0; 875 } else { 876 /* in the middle of the list */ 877 payload[h->next_hole].prev_hole = h->prev_hole; 878 payload[h->prev_hole].next_hole = h->next_hole; 879 } 880 881 } else if (h->last_byte <= start + len) { 882 /* overlaps with final part of the hole: shorten this hole */ 883 h->last_byte = start; 884 885 } else if (h >= thisfrag) { 886 /* overlaps with initial part of the hole: move this hole */ 887 newh = thisfrag + (len / 8); 888 *newh = *h; 889 h = newh; 890 if (h->next_hole) 891 payload[h->next_hole].prev_hole = (h - payload); 892 if (h->prev_hole) 893 payload[h->prev_hole].next_hole = (h - payload); 894 else 895 first_hole = (h - payload); 896 897 } else { 898 /* fragment sits in the middle: split the hole */ 899 newh = thisfrag + (len / 8); 900 *newh = *h; 901 h->last_byte = start; 902 h->next_hole = (newh - payload); 903 newh->prev_hole = (h - payload); 904 if (newh->next_hole) 905 payload[newh->next_hole].prev_hole = (newh - payload); 906 } 907 908 /* finally copy this fragment and possibly return whole packet */ 909 memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len); 910 if (!done) 911 return NULL; 912 913 localip->ip_len = htons(total_len); 914 *lenp = total_len + IP_HDR_SIZE; 915 return localip; 916 } 917 918 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) 919 { 920 u16 ip_off = ntohs(ip->ip_off); 921 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 922 return ip; /* not a fragment */ 923 return __NetDefragment(ip, lenp); 924 } 925 926 #else /* !CONFIG_IP_DEFRAG */ 927 928 static inline struct ip_udp_hdr *NetDefragment(struct ip_udp_hdr *ip, int *lenp) 929 { 930 u16 ip_off = ntohs(ip->ip_off); 931 if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG))) 932 return ip; /* not a fragment */ 933 return NULL; 934 } 935 #endif 936 937 /** 938 * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently 939 * drop others. 940 * 941 * @parma ip IP packet containing the ICMP 942 */ 943 static void receive_icmp(struct ip_udp_hdr *ip, int len, 944 struct in_addr src_ip, struct ethernet_hdr *et) 945 { 946 struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src; 947 948 switch (icmph->type) { 949 case ICMP_REDIRECT: 950 if (icmph->code != ICMP_REDIR_HOST) 951 return; 952 printf(" ICMP Host Redirect to %pI4 ", 953 &icmph->un.gateway); 954 break; 955 default: 956 #if defined(CONFIG_CMD_PING) 957 ping_receive(et, ip, len); 958 #endif 959 #ifdef CONFIG_CMD_TFTPPUT 960 if (packet_icmp_handler) 961 packet_icmp_handler(icmph->type, icmph->code, 962 ntohs(ip->udp_dst), src_ip, ntohs(ip->udp_src), 963 icmph->un.data, ntohs(ip->udp_len)); 964 #endif 965 break; 966 } 967 } 968 969 void net_process_received_packet(uchar *in_packet, int len) 970 { 971 struct ethernet_hdr *et; 972 struct ip_udp_hdr *ip; 973 struct in_addr dst_ip; 974 struct in_addr src_ip; 975 int eth_proto; 976 #if defined(CONFIG_CMD_CDP) 977 int iscdp; 978 #endif 979 ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid; 980 981 debug_cond(DEBUG_NET_PKT, "packet received\n"); 982 983 net_rx_packet = in_packet; 984 net_rx_packet_len = len; 985 et = (struct ethernet_hdr *)in_packet; 986 987 /* too small packet? */ 988 if (len < ETHER_HDR_SIZE) 989 return; 990 991 #ifdef CONFIG_API 992 if (push_packet) { 993 (*push_packet)(in_packet, len); 994 return; 995 } 996 #endif 997 998 #if defined(CONFIG_CMD_CDP) 999 /* keep track if packet is CDP */ 1000 iscdp = is_cdp_packet(et->et_dest); 1001 #endif 1002 1003 myvlanid = ntohs(NetOurVLAN); 1004 if (myvlanid == (ushort)-1) 1005 myvlanid = VLAN_NONE; 1006 mynvlanid = ntohs(NetOurNativeVLAN); 1007 if (mynvlanid == (ushort)-1) 1008 mynvlanid = VLAN_NONE; 1009 1010 eth_proto = ntohs(et->et_protlen); 1011 1012 if (eth_proto < 1514) { 1013 struct e802_hdr *et802 = (struct e802_hdr *)et; 1014 /* 1015 * Got a 802.2 packet. Check the other protocol field. 1016 * XXX VLAN over 802.2+SNAP not implemented! 1017 */ 1018 eth_proto = ntohs(et802->et_prot); 1019 1020 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE); 1021 len -= E802_HDR_SIZE; 1022 1023 } else if (eth_proto != PROT_VLAN) { /* normal packet */ 1024 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE); 1025 len -= ETHER_HDR_SIZE; 1026 1027 } else { /* VLAN packet */ 1028 struct vlan_ethernet_hdr *vet = 1029 (struct vlan_ethernet_hdr *)et; 1030 1031 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n"); 1032 1033 /* too small packet? */ 1034 if (len < VLAN_ETHER_HDR_SIZE) 1035 return; 1036 1037 /* if no VLAN active */ 1038 if ((ntohs(NetOurVLAN) & VLAN_IDMASK) == VLAN_NONE 1039 #if defined(CONFIG_CMD_CDP) 1040 && iscdp == 0 1041 #endif 1042 ) 1043 return; 1044 1045 cti = ntohs(vet->vet_tag); 1046 vlanid = cti & VLAN_IDMASK; 1047 eth_proto = ntohs(vet->vet_type); 1048 1049 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE); 1050 len -= VLAN_ETHER_HDR_SIZE; 1051 } 1052 1053 debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto); 1054 1055 #if defined(CONFIG_CMD_CDP) 1056 if (iscdp) { 1057 cdp_receive((uchar *)ip, len); 1058 return; 1059 } 1060 #endif 1061 1062 if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) { 1063 if (vlanid == VLAN_NONE) 1064 vlanid = (mynvlanid & VLAN_IDMASK); 1065 /* not matched? */ 1066 if (vlanid != (myvlanid & VLAN_IDMASK)) 1067 return; 1068 } 1069 1070 switch (eth_proto) { 1071 1072 case PROT_ARP: 1073 ArpReceive(et, ip, len); 1074 break; 1075 1076 #ifdef CONFIG_CMD_RARP 1077 case PROT_RARP: 1078 rarp_receive(ip, len); 1079 break; 1080 #endif 1081 case PROT_IP: 1082 debug_cond(DEBUG_NET_PKT, "Got IP\n"); 1083 /* Before we start poking the header, make sure it is there */ 1084 if (len < IP_UDP_HDR_SIZE) { 1085 debug("len bad %d < %lu\n", len, 1086 (ulong)IP_UDP_HDR_SIZE); 1087 return; 1088 } 1089 /* Check the packet length */ 1090 if (len < ntohs(ip->ip_len)) { 1091 debug("len bad %d < %d\n", len, ntohs(ip->ip_len)); 1092 return; 1093 } 1094 len = ntohs(ip->ip_len); 1095 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n", 1096 len, ip->ip_hl_v & 0xff); 1097 1098 /* Can't deal with anything except IPv4 */ 1099 if ((ip->ip_hl_v & 0xf0) != 0x40) 1100 return; 1101 /* Can't deal with IP options (headers != 20 bytes) */ 1102 if ((ip->ip_hl_v & 0x0f) > 0x05) 1103 return; 1104 /* Check the Checksum of the header */ 1105 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) { 1106 debug("checksum bad\n"); 1107 return; 1108 } 1109 /* If it is not for us, ignore it */ 1110 dst_ip = net_read_ip(&ip->ip_dst); 1111 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr && 1112 dst_ip.s_addr != 0xFFFFFFFF) { 1113 #ifdef CONFIG_MCAST_TFTP 1114 if (net_mcast_addr != dst_ip) 1115 #endif 1116 return; 1117 } 1118 /* Read source IP address for later use */ 1119 src_ip = net_read_ip(&ip->ip_src); 1120 /* 1121 * The function returns the unchanged packet if it's not 1122 * a fragment, and either the complete packet or NULL if 1123 * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL) 1124 */ 1125 ip = NetDefragment(ip, &len); 1126 if (!ip) 1127 return; 1128 /* 1129 * watch for ICMP host redirects 1130 * 1131 * There is no real handler code (yet). We just watch 1132 * for ICMP host redirect messages. In case anybody 1133 * sees these messages: please contact me 1134 * (wd@denx.de), or - even better - send me the 1135 * necessary fixes :-) 1136 * 1137 * Note: in all cases where I have seen this so far 1138 * it was a problem with the router configuration, 1139 * for instance when a router was configured in the 1140 * BOOTP reply, but the TFTP server was on the same 1141 * subnet. So this is probably a warning that your 1142 * configuration might be wrong. But I'm not really 1143 * sure if there aren't any other situations. 1144 * 1145 * Simon Glass <sjg@chromium.org>: We get an ICMP when 1146 * we send a tftp packet to a dead connection, or when 1147 * there is no server at the other end. 1148 */ 1149 if (ip->ip_p == IPPROTO_ICMP) { 1150 receive_icmp(ip, len, src_ip, et); 1151 return; 1152 } else if (ip->ip_p != IPPROTO_UDP) { /* Only UDP packets */ 1153 return; 1154 } 1155 1156 debug_cond(DEBUG_DEV_PKT, 1157 "received UDP (to=%pI4, from=%pI4, len=%d)\n", 1158 &dst_ip, &src_ip, len); 1159 1160 #ifdef CONFIG_UDP_CHECKSUM 1161 if (ip->udp_xsum != 0) { 1162 ulong xsum; 1163 ushort *sumptr; 1164 ushort sumlen; 1165 1166 xsum = ip->ip_p; 1167 xsum += (ntohs(ip->udp_len)); 1168 xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff; 1169 xsum += (ntohl(ip->ip_src.s_addr) >> 0) & 0x0000ffff; 1170 xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff; 1171 xsum += (ntohl(ip->ip_dst.s_addr) >> 0) & 0x0000ffff; 1172 1173 sumlen = ntohs(ip->udp_len); 1174 sumptr = (ushort *) &(ip->udp_src); 1175 1176 while (sumlen > 1) { 1177 ushort sumdata; 1178 1179 sumdata = *sumptr++; 1180 xsum += ntohs(sumdata); 1181 sumlen -= 2; 1182 } 1183 if (sumlen > 0) { 1184 ushort sumdata; 1185 1186 sumdata = *(unsigned char *) sumptr; 1187 sumdata = (sumdata << 8) & 0xff00; 1188 xsum += sumdata; 1189 } 1190 while ((xsum >> 16) != 0) { 1191 xsum = (xsum & 0x0000ffff) + 1192 ((xsum >> 16) & 0x0000ffff); 1193 } 1194 if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) { 1195 printf(" UDP wrong checksum %08lx %08x\n", 1196 xsum, ntohs(ip->udp_xsum)); 1197 return; 1198 } 1199 } 1200 #endif 1201 1202 1203 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD) 1204 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE, 1205 src_ip, 1206 ntohs(ip->udp_dst), 1207 ntohs(ip->udp_src), 1208 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1209 #endif 1210 /* 1211 * IP header OK. Pass the packet to the current handler. 1212 */ 1213 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE, 1214 ntohs(ip->udp_dst), 1215 src_ip, 1216 ntohs(ip->udp_src), 1217 ntohs(ip->udp_len) - UDP_HDR_SIZE); 1218 break; 1219 } 1220 } 1221 1222 1223 /**********************************************************************/ 1224 1225 static int net_check_prereq(enum proto_t protocol) 1226 { 1227 switch (protocol) { 1228 /* Fall through */ 1229 #if defined(CONFIG_CMD_PING) 1230 case PING: 1231 if (net_ping_ip.s_addr == 0) { 1232 puts("*** ERROR: ping address not given\n"); 1233 return 1; 1234 } 1235 goto common; 1236 #endif 1237 #if defined(CONFIG_CMD_SNTP) 1238 case SNTP: 1239 if (net_ntp_server.s_addr == 0) { 1240 puts("*** ERROR: NTP server address not given\n"); 1241 return 1; 1242 } 1243 goto common; 1244 #endif 1245 #if defined(CONFIG_CMD_DNS) 1246 case DNS: 1247 if (net_dns_server.s_addr == 0) { 1248 puts("*** ERROR: DNS server address not given\n"); 1249 return 1; 1250 } 1251 goto common; 1252 #endif 1253 #if defined(CONFIG_CMD_NFS) 1254 case NFS: 1255 #endif 1256 case TFTPGET: 1257 case TFTPPUT: 1258 if (net_server_ip.s_addr == 0) { 1259 puts("*** ERROR: `serverip' not set\n"); 1260 return 1; 1261 } 1262 #if defined(CONFIG_CMD_PING) || defined(CONFIG_CMD_SNTP) || \ 1263 defined(CONFIG_CMD_DNS) 1264 common: 1265 #endif 1266 /* Fall through */ 1267 1268 case NETCONS: 1269 case TFTPSRV: 1270 if (net_ip.s_addr == 0) { 1271 puts("*** ERROR: `ipaddr' not set\n"); 1272 return 1; 1273 } 1274 /* Fall through */ 1275 1276 #ifdef CONFIG_CMD_RARP 1277 case RARP: 1278 #endif 1279 case BOOTP: 1280 case CDP: 1281 case DHCP: 1282 case LINKLOCAL: 1283 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) { 1284 int num = eth_get_dev_index(); 1285 1286 switch (num) { 1287 case -1: 1288 puts("*** ERROR: No ethernet found.\n"); 1289 return 1; 1290 case 0: 1291 puts("*** ERROR: `ethaddr' not set\n"); 1292 break; 1293 default: 1294 printf("*** ERROR: `eth%daddr' not set\n", 1295 num); 1296 break; 1297 } 1298 1299 NetStartAgain(); 1300 return 2; 1301 } 1302 /* Fall through */ 1303 default: 1304 return 0; 1305 } 1306 return 0; /* OK */ 1307 } 1308 /**********************************************************************/ 1309 1310 int 1311 net_eth_hdr_size(void) 1312 { 1313 ushort myvlanid; 1314 1315 myvlanid = ntohs(NetOurVLAN); 1316 if (myvlanid == (ushort)-1) 1317 myvlanid = VLAN_NONE; 1318 1319 return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE : 1320 VLAN_ETHER_HDR_SIZE; 1321 } 1322 1323 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot) 1324 { 1325 struct ethernet_hdr *et = (struct ethernet_hdr *)xet; 1326 ushort myvlanid; 1327 1328 myvlanid = ntohs(NetOurVLAN); 1329 if (myvlanid == (ushort)-1) 1330 myvlanid = VLAN_NONE; 1331 1332 memcpy(et->et_dest, dest_ethaddr, 6); 1333 memcpy(et->et_src, net_ethaddr, 6); 1334 if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) { 1335 et->et_protlen = htons(prot); 1336 return ETHER_HDR_SIZE; 1337 } else { 1338 struct vlan_ethernet_hdr *vet = 1339 (struct vlan_ethernet_hdr *)xet; 1340 1341 vet->vet_vlan_type = htons(PROT_VLAN); 1342 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK)); 1343 vet->vet_type = htons(prot); 1344 return VLAN_ETHER_HDR_SIZE; 1345 } 1346 } 1347 1348 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot) 1349 { 1350 ushort protlen; 1351 1352 memcpy(et->et_dest, addr, 6); 1353 memcpy(et->et_src, net_ethaddr, 6); 1354 protlen = ntohs(et->et_protlen); 1355 if (protlen == PROT_VLAN) { 1356 struct vlan_ethernet_hdr *vet = 1357 (struct vlan_ethernet_hdr *)et; 1358 vet->vet_type = htons(prot); 1359 return VLAN_ETHER_HDR_SIZE; 1360 } else if (protlen > 1514) { 1361 et->et_protlen = htons(prot); 1362 return ETHER_HDR_SIZE; 1363 } else { 1364 /* 802.2 + SNAP */ 1365 struct e802_hdr *et802 = (struct e802_hdr *)et; 1366 et802->et_prot = htons(prot); 1367 return E802_HDR_SIZE; 1368 } 1369 } 1370 1371 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source) 1372 { 1373 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1374 1375 /* 1376 * Construct an IP header. 1377 */ 1378 /* IP_HDR_SIZE / 4 (not including UDP) */ 1379 ip->ip_hl_v = 0x45; 1380 ip->ip_tos = 0; 1381 ip->ip_len = htons(IP_HDR_SIZE); 1382 ip->ip_id = htons(NetIPID++); 1383 ip->ip_off = htons(IP_FLAGS_DFRAG); /* Don't fragment */ 1384 ip->ip_ttl = 255; 1385 ip->ip_sum = 0; 1386 /* already in network byte order */ 1387 net_copy_ip((void *)&ip->ip_src, &source); 1388 /* already in network byte order */ 1389 net_copy_ip((void *)&ip->ip_dst, &dest); 1390 } 1391 1392 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport, 1393 int len) 1394 { 1395 struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt; 1396 1397 /* 1398 * If the data is an odd number of bytes, zero the 1399 * byte after the last byte so that the checksum 1400 * will work. 1401 */ 1402 if (len & 1) 1403 pkt[IP_UDP_HDR_SIZE + len] = 0; 1404 1405 net_set_ip_header(pkt, dest, net_ip); 1406 ip->ip_len = htons(IP_UDP_HDR_SIZE + len); 1407 ip->ip_p = IPPROTO_UDP; 1408 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE); 1409 1410 ip->udp_src = htons(sport); 1411 ip->udp_dst = htons(dport); 1412 ip->udp_len = htons(UDP_HDR_SIZE + len); 1413 ip->udp_xsum = 0; 1414 } 1415 1416 void copy_filename(char *dst, const char *src, int size) 1417 { 1418 if (*src && (*src == '"')) { 1419 ++src; 1420 --size; 1421 } 1422 1423 while ((--size > 0) && *src && (*src != '"')) 1424 *dst++ = *src++; 1425 *dst = '\0'; 1426 } 1427 1428 #if defined(CONFIG_CMD_NFS) || \ 1429 defined(CONFIG_CMD_SNTP) || \ 1430 defined(CONFIG_CMD_DNS) 1431 /* 1432 * make port a little random (1024-17407) 1433 * This keeps the math somewhat trivial to compute, and seems to work with 1434 * all supported protocols/clients/servers 1435 */ 1436 unsigned int random_port(void) 1437 { 1438 return 1024 + (get_timer(0) % 0x4000); 1439 } 1440 #endif 1441 1442 void ip_to_string(struct in_addr x, char *s) 1443 { 1444 x.s_addr = ntohl(x.s_addr); 1445 sprintf(s, "%d.%d.%d.%d", 1446 (int) ((x.s_addr >> 24) & 0xff), 1447 (int) ((x.s_addr >> 16) & 0xff), 1448 (int) ((x.s_addr >> 8) & 0xff), 1449 (int) ((x.s_addr >> 0) & 0xff) 1450 ); 1451 } 1452 1453 void VLAN_to_string(ushort x, char *s) 1454 { 1455 x = ntohs(x); 1456 1457 if (x == (ushort)-1) 1458 x = VLAN_NONE; 1459 1460 if (x == VLAN_NONE) 1461 strcpy(s, "none"); 1462 else 1463 sprintf(s, "%d", x & VLAN_IDMASK); 1464 } 1465 1466 ushort string_to_VLAN(const char *s) 1467 { 1468 ushort id; 1469 1470 if (s == NULL) 1471 return htons(VLAN_NONE); 1472 1473 if (*s < '0' || *s > '9') 1474 id = VLAN_NONE; 1475 else 1476 id = (ushort)simple_strtoul(s, NULL, 10); 1477 1478 return htons(id); 1479 } 1480 1481 ushort getenv_VLAN(char *var) 1482 { 1483 return string_to_VLAN(getenv(var)); 1484 } 1485