net/net.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *      Copied from Linux Monitor (LiMon) - Networking.
   4  *
   5  *      Copyright 1994 - 2000 Neil Russell.
   6  *      (See License)
   7  *      Copyright 2000 Roland Borde
   8  *      Copyright 2000 Paolo Scaffardi
   9  *      Copyright 2000-2002 Wolfgang Denk, wd@denx.de
  10  */
  11
  12 /*
  13  * General Desription:
  14  *
  15  * The user interface supports commands for BOOTP, RARP, and TFTP.
  16  * Also, we support ARP internally. Depending on available data,
  17  * these interact as follows:
  18  *
  19  * BOOTP:
  20  *
  21  *      Prerequisites:  - own ethernet address
  22  *      We want:        - own IP address
  23  *                      - TFTP server IP address
  24  *                      - name of bootfile
  25  *      Next step:      ARP
  26  *
  27  * LINK_LOCAL:
  28  *
  29  *      Prerequisites:  - own ethernet address
  30  *      We want:        - own IP address
  31  *      Next step:      ARP
  32  *
  33  * RARP:
  34  *
  35  *      Prerequisites:  - own ethernet address
  36  *      We want:        - own IP address
  37  *                      - TFTP server IP address
  38  *      Next step:      ARP
  39  *
  40  * ARP:
  41  *
  42  *      Prerequisites:  - own ethernet address
  43  *                      - own IP address
  44  *                      - TFTP server IP address
  45  *      We want:        - TFTP server ethernet address
  46  *      Next step:      TFTP
  47  *
  48  * DHCP:
  49  *
  50  *     Prerequisites:   - own ethernet address
  51  *     We want:         - IP, Netmask, ServerIP, Gateway IP
  52  *                      - bootfilename, lease time
  53  *     Next step:       - TFTP
  54  *
  55  * TFTP:
  56  *
  57  *      Prerequisites:  - own ethernet address
  58  *                      - own IP address
  59  *                      - TFTP server IP address
  60  *                      - TFTP server ethernet address
  61  *                      - name of bootfile (if unknown, we use a default name
  62  *                        derived from our own IP address)
  63  *      We want:        - load the boot file
  64  *      Next step:      none
  65  *
  66  * NFS:
  67  *
  68  *      Prerequisites:  - own ethernet address
  69  *                      - own IP address
  70  *                      - name of bootfile (if unknown, we use a default name
  71  *                        derived from our own IP address)
  72  *      We want:        - load the boot file
  73  *      Next step:      none
  74  *
  75  *
  76  * WOL:
  77  *
  78  *      Prerequisites:  - own ethernet address
  79  *      We want:        - magic packet or timeout
  80  *      Next step:      none
  81  */
  82
  83
  84 #include <common.h>
  85 #include <bootstage.h>
  86 #include <command.h>
  87 #include <console.h>
  88 #include <env.h>
  89 #include <env_internal.h>
  90 #include <errno.h>
  91 #include <image.h>
  92 #include <log.h>
  93 #include <net.h>
  94 #include <net/fastboot.h>
  95 #include <net/tftp.h>
  96 #include <net/ncsi.h>
  97 #if defined(CONFIG_CMD_PCAP)
  98 #include <net/pcap.h>
  99 #endif
 100 #include <net/udp.h>
 101 #if defined(CONFIG_LED_STATUS)
 102 #include <miiphy.h>
 103 #include <status_led.h>
 104 #endif
 105 #include <watchdog.h>
 106 #include <linux/compiler.h>
 107 #include "arp.h"
 108 #include "bootp.h"
 109 #include "cdp.h"
 110 #if defined(CONFIG_CMD_DNS)
 111 #include "dns.h"
 112 #endif
 113 #include "link_local.h"
 114 #include "nfs.h"
 115 #include "ping.h"
 116 #include "rarp.h"
 117 #if defined(CONFIG_CMD_WOL)
 118 #include "wol.h"
 119 #endif
 120
 121 /** BOOTP EXTENTIONS **/
 122
 123 /* Our subnet mask (0=unknown) */
 124 struct in_addr net_netmask;
 125 /* Our gateways IP address */
 126 struct in_addr net_gateway;
 127 /* Our DNS IP address */
 128 struct in_addr net_dns_server;
 129 #if defined(CONFIG_BOOTP_DNS2)
 130 /* Our 2nd DNS IP address */
 131 struct in_addr net_dns_server2;
 132 #endif
 133
 134 /** END OF BOOTP EXTENTIONS **/
 135
 136 /* Our ethernet address */
 137 u8 net_ethaddr[6];
 138 /* Boot server enet address */
 139 u8 net_server_ethaddr[6];
 140 /* Our IP addr (0 = unknown) */
 141 struct in_addr  net_ip;
 142 /* Server IP addr (0 = unknown) */
 143 struct in_addr  net_server_ip;
 144 /* Current receive packet */
 145 uchar *net_rx_packet;
 146 /* Current rx packet length */
 147 int             net_rx_packet_len;
 148 /* IP packet ID */
 149 static unsigned net_ip_id;
 150 /* Ethernet bcast address */
 151 const u8 net_bcast_ethaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 152 const u8 net_null_ethaddr[6];
 153 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
 154 void (*push_packet)(void *, int len) = 0;
 155 #endif
 156 /* Network loop state */
 157 enum net_loop_state net_state;
 158 /* Tried all network devices */
 159 int             net_restart_wrap;
 160 /* Network loop restarted */
 161 static int      net_restarted;
 162 /* At least one device configured */
 163 static int      net_dev_exists;
 164
 165 /* XXX in both little & big endian machines 0xFFFF == ntohs(-1) */
 166 /* default is without VLAN */
 167 ushort          net_our_vlan = 0xFFFF;
 168 /* ditto */
 169 ushort          net_native_vlan = 0xFFFF;
 170
 171 /* Boot File name */
 172 char net_boot_file_name[1024];
 173 /* Indicates whether the file name was specified on the command line */
 174 bool net_boot_file_name_explicit;
 175 /* The actual transferred size of the bootfile (in bytes) */
 176 u32 net_boot_file_size;
 177 /* Boot file size in blocks as reported by the DHCP server */
 178 u32 net_boot_file_expected_size_in_blocks;
 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 *time_handler;
 193 /* Time base value */
 194 static ulong    time_start;
 195 /* Current timeout value */
 196 static ulong    time_delta;
 197 /* THE transmit packet */
 198 uchar *net_tx_packet;
 199
 200 static int net_check_prereq(enum proto_t protocol);
 201
 202 static int net_try_count;
 203
 204 int __maybe_unused net_busy_flag;
 205
 206 /**********************************************************************/
 207
 208 static int on_ipaddr(const char *name, const char *value, enum env_op op,
 209         int flags)
 210 {
 211         if (flags & H_PROGRAMMATIC)
 212                 return 0;
 213
 214         net_ip = string_to_ip(value);
 215
 216         return 0;
 217 }
 218 U_BOOT_ENV_CALLBACK(ipaddr, on_ipaddr);
 219
 220 static int on_gatewayip(const char *name, const char *value, enum env_op op,
 221         int flags)
 222 {
 223         if (flags & H_PROGRAMMATIC)
 224                 return 0;
 225
 226         net_gateway = string_to_ip(value);
 227
 228         return 0;
 229 }
 230 U_BOOT_ENV_CALLBACK(gatewayip, on_gatewayip);
 231
 232 static int on_netmask(const char *name, const char *value, enum env_op op,
 233         int flags)
 234 {
 235         if (flags & H_PROGRAMMATIC)
 236                 return 0;
 237
 238         net_netmask = string_to_ip(value);
 239
 240         return 0;
 241 }
 242 U_BOOT_ENV_CALLBACK(netmask, on_netmask);
 243
 244 static int on_serverip(const char *name, const char *value, enum env_op op,
 245         int flags)
 246 {
 247         if (flags & H_PROGRAMMATIC)
 248                 return 0;
 249
 250         net_server_ip = string_to_ip(value);
 251
 252         return 0;
 253 }
 254 U_BOOT_ENV_CALLBACK(serverip, on_serverip);
 255
 256 static int on_nvlan(const char *name, const char *value, enum env_op op,
 257         int flags)
 258 {
 259         if (flags & H_PROGRAMMATIC)
 260                 return 0;
 261
 262         net_native_vlan = string_to_vlan(value);
 263
 264         return 0;
 265 }
 266 U_BOOT_ENV_CALLBACK(nvlan, on_nvlan);
 267
 268 static int on_vlan(const char *name, const char *value, enum env_op op,
 269         int flags)
 270 {
 271         if (flags & H_PROGRAMMATIC)
 272                 return 0;
 273
 274         net_our_vlan = string_to_vlan(value);
 275
 276         return 0;
 277 }
 278 U_BOOT_ENV_CALLBACK(vlan, on_vlan);
 279
 280 #if defined(CONFIG_CMD_DNS)
 281 static int on_dnsip(const char *name, const char *value, enum env_op op,
 282         int flags)
 283 {
 284         if (flags & H_PROGRAMMATIC)
 285                 return 0;
 286
 287         net_dns_server = string_to_ip(value);
 288
 289         return 0;
 290 }
 291 U_BOOT_ENV_CALLBACK(dnsip, on_dnsip);
 292 #endif
 293
 294 /*
 295  * Check if autoload is enabled. If so, use either NFS or TFTP to download
 296  * the boot file.
 297  */
 298 void net_auto_load(void)
 299 {
 300 #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
 301         const char *s = env_get("autoload");
 302
 303         if (s != NULL && strcmp(s, "NFS") == 0) {
 304                 if (net_check_prereq(NFS)) {
 305 /* We aren't expecting to get a serverip, so just accept the assigned IP */
 306                         if (IS_ENABLED(CONFIG_BOOTP_SERVERIP)) {
 307                                 net_set_state(NETLOOP_SUCCESS);
 308                         } else {
 309                                 printf("Cannot autoload with NFS\n");
 310                                 net_set_state(NETLOOP_FAIL);
 311                         }
 312                         return;
 313                 }
 314                 /*
 315                  * Use NFS to load the bootfile.
 316                  */
 317                 nfs_start();
 318                 return;
 319         }
 320 #endif
 321         if (env_get_yesno("autoload") == 0) {
 322                 /*
 323                  * Just use BOOTP/RARP to configure system;
 324                  * Do not use TFTP to load the bootfile.
 325                  */
 326                 net_set_state(NETLOOP_SUCCESS);
 327                 return;
 328         }
 329         if (net_check_prereq(TFTPGET)) {
 330 /* We aren't expecting to get a serverip, so just accept the assigned IP */
 331                 if (IS_ENABLED(CONFIG_BOOTP_SERVERIP)) {
 332                         net_set_state(NETLOOP_SUCCESS);
 333                 } else {
 334                         printf("Cannot autoload with TFTPGET\n");
 335                         net_set_state(NETLOOP_FAIL);
 336                 }
 337                 return;
 338         }
 339         tftp_start(TFTPGET);
 340 }
 341
 342 static int net_init_loop(void)
 343 {
 344         if (eth_get_dev())
 345                 memcpy(net_ethaddr, eth_get_ethaddr(), 6);
 346         else
 347                 /*
 348                  * Not ideal, but there's no way to get the actual error, and I
 349                  * don't feel like fixing all the users of eth_get_dev to deal
 350                  * with errors.
 351                  */
 352                 return -ENONET;
 353
 354         return 0;
 355 }
 356
 357 static void net_clear_handlers(void)
 358 {
 359         net_set_udp_handler(NULL);
 360         net_set_arp_handler(NULL);
 361         net_set_timeout_handler(0, NULL);
 362 }
 363
 364 static void net_cleanup_loop(void)
 365 {
 366         net_clear_handlers();
 367 }
 368
 369 int net_init(void)
 370 {
 371         static int first_call = 1;
 372
 373         if (first_call) {
 374                 /*
 375                  *      Setup packet buffers, aligned correctly.
 376                  */
 377                 int i;
 378
 379                 net_tx_packet = &net_pkt_buf[0] + (PKTALIGN - 1);
 380                 net_tx_packet -= (ulong)net_tx_packet % PKTALIGN;
 381                 for (i = 0; i < PKTBUFSRX; i++) {
 382                         net_rx_packets[i] = net_tx_packet +
 383                                 (i + 1) * PKTSIZE_ALIGN;
 384                 }
 385                 arp_init();
 386                 net_clear_handlers();
 387
 388                 /* Only need to setup buffer pointers once. */
 389                 first_call = 0;
 390         }
 391
 392         return net_init_loop();
 393 }
 394
 395 /**********************************************************************/
 396 /*
 397  *      Main network processing loop.
 398  */
 399
 400 int net_loop(enum proto_t protocol)
 401 {
 402         int ret = -EINVAL;
 403         enum net_loop_state prev_net_state = net_state;
 404
 405 #if defined(CONFIG_CMD_PING)
 406         if (protocol != PING)
 407                 net_ping_ip.s_addr = 0;
 408 #endif
 409         net_restarted = 0;
 410         net_dev_exists = 0;
 411         net_try_count = 1;
 412         debug_cond(DEBUG_INT_STATE, "--- net_loop Entry\n");
 413
 414 #ifdef CONFIG_PHY_NCSI
 415         if (phy_interface_is_ncsi() && protocol != NCSI && !ncsi_active()) {
 416                 printf("%s: configuring NCSI first\n", __func__);
 417                 if (net_loop(NCSI) < 0)
 418                         return ret;
 419                 eth_init_state_only();
 420                 goto restart;
 421         }
 422 #endif
 423
 424         bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
 425         net_init();
 426         if (eth_is_on_demand_init()) {
 427                 eth_halt();
 428                 eth_set_current();
 429                 ret = eth_init();
 430                 if (ret < 0) {
 431                         eth_halt();
 432                         return ret;
 433                 }
 434         } else {
 435                 eth_init_state_only();
 436         }
 437
 438 restart:
 439 #ifdef CONFIG_USB_KEYBOARD
 440         net_busy_flag = 0;
 441 #endif
 442         net_set_state(NETLOOP_CONTINUE);
 443
 444         /*
 445          *      Start the ball rolling with the given start function.  From
 446          *      here on, this code is a state machine driven by received
 447          *      packets and timer events.
 448          */
 449         debug_cond(DEBUG_INT_STATE, "--- net_loop Init\n");
 450         net_init_loop();
 451
 452         switch (net_check_prereq(protocol)) {
 453         case 1:
 454                 /* network not configured */
 455                 eth_halt();
 456                 net_set_state(prev_net_state);
 457                 return -ENODEV;
 458
 459         case 2:
 460                 /* network device not configured */
 461                 break;
 462
 463         case 0:
 464                 net_dev_exists = 1;
 465                 net_boot_file_size = 0;
 466                 switch (protocol) {
 467 #ifdef CONFIG_CMD_TFTPBOOT
 468                 case TFTPGET:
 469 #ifdef CONFIG_CMD_TFTPPUT
 470                 case TFTPPUT:
 471 #endif
 472                         /* always use ARP to get server ethernet address */
 473                         tftp_start(protocol);
 474                         break;
 475 #endif
 476 #ifdef CONFIG_CMD_TFTPSRV
 477                 case TFTPSRV:
 478                         tftp_start_server();
 479                         break;
 480 #endif
 481 #ifdef CONFIG_UDP_FUNCTION_FASTBOOT
 482                 case FASTBOOT:
 483                         fastboot_start_server();
 484                         break;
 485 #endif
 486 #if defined(CONFIG_CMD_DHCP)
 487                 case DHCP:
 488                         bootp_reset();
 489                         net_ip.s_addr = 0;
 490                         dhcp_request();         /* Basically same as BOOTP */
 491                         break;
 492 #endif
 493 #if defined(CONFIG_CMD_BOOTP)
 494                 case BOOTP:
 495                         bootp_reset();
 496                         net_ip.s_addr = 0;
 497                         bootp_request();
 498                         break;
 499 #endif
 500 #if defined(CONFIG_CMD_RARP)
 501                 case RARP:
 502                         rarp_try = 0;
 503                         net_ip.s_addr = 0;
 504                         rarp_request();
 505                         break;
 506 #endif
 507 #if defined(CONFIG_CMD_PING)
 508                 case PING:
 509                         ping_start();
 510                         break;
 511 #endif
 512 #if defined(CONFIG_CMD_NFS) && !defined(CONFIG_SPL_BUILD)
 513                 case NFS:
 514                         nfs_start();
 515                         break;
 516 #endif
 517 #if defined(CONFIG_CMD_CDP)
 518                 case CDP:
 519                         cdp_start();
 520                         break;
 521 #endif
 522 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
 523                 case NETCONS:
 524                         nc_start();
 525                         break;
 526 #endif
 527 #if defined(CONFIG_CMD_DNS)
 528                 case DNS:
 529                         dns_start();
 530                         break;
 531 #endif
 532 #if defined(CONFIG_CMD_LINK_LOCAL)
 533                 case LINKLOCAL:
 534                         link_local_start();
 535                         break;
 536 #endif
 537 #if defined(CONFIG_CMD_WOL)
 538                 case WOL:
 539                         wol_start();
 540                         break;
 541 #endif
 542 #if defined(CONFIG_PHY_NCSI)
 543                 case NCSI:
 544                         ncsi_probe_packages();
 545                         break;
 546 #endif
 547                 default:
 548                         break;
 549                 }
 550
 551                 if (IS_ENABLED(CONFIG_PROT_UDP) && protocol == UDP)
 552                         udp_start();
 553
 554                 break;
 555         }
 556
 557 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 558 #if     defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN)        && \
 559         defined(CONFIG_LED_STATUS)                      && \
 560         defined(CONFIG_LED_STATUS_RED)
 561         /*
 562          * Echo the inverted link state to the fault LED.
 563          */
 564         if (miiphy_link(eth_get_dev()->name, CONFIG_SYS_FAULT_MII_ADDR))
 565                 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_OFF);
 566         else
 567                 status_led_set(CONFIG_LED_STATUS_RED, CONFIG_LED_STATUS_ON);
 568 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
 569 #endif /* CONFIG_MII, ... */
 570 #ifdef CONFIG_USB_KEYBOARD
 571         net_busy_flag = 1;
 572 #endif
 573
 574         /*
 575          *      Main packet reception loop.  Loop receiving packets until
 576          *      someone sets `net_state' to a state that terminates.
 577          */
 578         for (;;) {
 579                 schedule();
 580                 if (arp_timeout_check() > 0)
 581                         time_start = get_timer(0);
 582
 583                 /*
 584                  *      Check the ethernet for a new packet.  The ethernet
 585                  *      receive routine will process it.
 586                  *      Most drivers return the most recent packet size, but not
 587                  *      errors that may have happened.
 588                  */
 589                 eth_rx();
 590
 591                 /*
 592                  *      Abort if ctrl-c was pressed.
 593                  */
 594                 if (ctrlc()) {
 595                         /* cancel any ARP that may not have completed */
 596                         net_arp_wait_packet_ip.s_addr = 0;
 597
 598                         net_cleanup_loop();
 599                         eth_halt();
 600                         /* Invalidate the last protocol */
 601                         eth_set_last_protocol(BOOTP);
 602
 603                         puts("\nAbort\n");
 604                         /* include a debug print as well incase the debug
 605                            messages are directed to stderr */
 606                         debug_cond(DEBUG_INT_STATE, "--- net_loop Abort!\n");
 607                         ret = -EINTR;
 608                         goto done;
 609                 }
 610
 611                 /*
 612                  *      Check for a timeout, and run the timeout handler
 613                  *      if we have one.
 614                  */
 615                 if (time_handler &&
 616                     ((get_timer(0) - time_start) > time_delta)) {
 617                         thand_f *x;
 618
 619 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 620 #if     defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN)        && \
 621         defined(CONFIG_LED_STATUS)                      && \
 622         defined(CONFIG_LED_STATUS_RED)
 623                         /*
 624                          * Echo the inverted link state to the fault LED.
 625                          */
 626                         if (miiphy_link(eth_get_dev()->name,
 627                                         CONFIG_SYS_FAULT_MII_ADDR))
 628                                 status_led_set(CONFIG_LED_STATUS_RED,
 629                                                CONFIG_LED_STATUS_OFF);
 630                         else
 631                                 status_led_set(CONFIG_LED_STATUS_RED,
 632                                                CONFIG_LED_STATUS_ON);
 633 #endif /* CONFIG_SYS_FAULT_ECHO_LINK_DOWN, ... */
 634 #endif /* CONFIG_MII, ... */
 635                         debug_cond(DEBUG_INT_STATE, "--- net_loop timeout\n");
 636                         x = time_handler;
 637                         time_handler = (thand_f *)0;
 638                         (*x)();
 639                 }
 640
 641                 if (net_state == NETLOOP_FAIL)
 642                         ret = net_start_again();
 643
 644                 switch (net_state) {
 645                 case NETLOOP_RESTART:
 646                         net_restarted = 1;
 647                         goto restart;
 648
 649                 case NETLOOP_SUCCESS:
 650                         net_cleanup_loop();
 651                         if (net_boot_file_size > 0) {
 652                                 printf("Bytes transferred = %d (%x hex)\n",
 653                                        net_boot_file_size, net_boot_file_size);
 654                                 env_set_hex("filesize", net_boot_file_size);
 655                                 env_set_hex("fileaddr", image_load_addr);
 656                         }
 657                         if (protocol != NETCONS && protocol != NCSI)
 658                                 eth_halt();
 659                         else
 660                                 eth_halt_state_only();
 661
 662                         eth_set_last_protocol(protocol);
 663
 664                         ret = net_boot_file_size;
 665                         debug_cond(DEBUG_INT_STATE, "--- net_loop Success!\n");
 666                         goto done;
 667
 668                 case NETLOOP_FAIL:
 669                         net_cleanup_loop();
 670                         /* Invalidate the last protocol */
 671                         eth_set_last_protocol(BOOTP);
 672                         debug_cond(DEBUG_INT_STATE, "--- net_loop Fail!\n");
 673                         ret = -ENONET;
 674                         goto done;
 675
 676                 case NETLOOP_CONTINUE:
 677                         continue;
 678                 }
 679         }
 680
 681 done:
 682 #ifdef CONFIG_USB_KEYBOARD
 683         net_busy_flag = 0;
 684 #endif
 685 #ifdef CONFIG_CMD_TFTPPUT
 686         /* Clear out the handlers */
 687         net_set_udp_handler(NULL);
 688         net_set_icmp_handler(NULL);
 689 #endif
 690         net_set_state(prev_net_state);
 691
 692 #if defined(CONFIG_CMD_PCAP)
 693         if (pcap_active())
 694                 pcap_print_status();
 695 #endif
 696         return ret;
 697 }
 698
 699 /**********************************************************************/
 700
 701 static void start_again_timeout_handler(void)
 702 {
 703         net_set_state(NETLOOP_RESTART);
 704 }
 705
 706 int net_start_again(void)
 707 {
 708         char *nretry;
 709         int retry_forever = 0;
 710         unsigned long retrycnt = 0;
 711         int ret;
 712
 713         nretry = env_get("netretry");
 714         if (nretry) {
 715                 if (!strcmp(nretry, "yes"))
 716                         retry_forever = 1;
 717                 else if (!strcmp(nretry, "no"))
 718                         retrycnt = 0;
 719                 else if (!strcmp(nretry, "once"))
 720                         retrycnt = 1;
 721                 else
 722                         retrycnt = simple_strtoul(nretry, NULL, 0);
 723         } else {
 724                 retrycnt = 0;
 725                 retry_forever = 0;
 726         }
 727
 728         if ((!retry_forever) && (net_try_count > retrycnt)) {
 729                 eth_halt();
 730                 net_set_state(NETLOOP_FAIL);
 731                 /*
 732                  * We don't provide a way for the protocol to return an error,
 733                  * but this is almost always the reason.
 734                  */
 735                 return -ETIMEDOUT;
 736         }
 737
 738         net_try_count++;
 739
 740         eth_halt();
 741 #if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
 742         eth_try_another(!net_restarted);
 743 #endif
 744         ret = eth_init();
 745         if (net_restart_wrap) {
 746                 net_restart_wrap = 0;
 747                 if (net_dev_exists) {
 748                         net_set_timeout_handler(10000UL,
 749                                                 start_again_timeout_handler);
 750                         net_set_udp_handler(NULL);
 751                 } else {
 752                         net_set_state(NETLOOP_FAIL);
 753                 }
 754         } else {
 755                 net_set_state(NETLOOP_RESTART);
 756         }
 757         return ret;
 758 }
 759
 760 /**********************************************************************/
 761 /*
 762  *      Miscelaneous bits.
 763  */
 764
 765 static void dummy_handler(uchar *pkt, unsigned dport,
 766                         struct in_addr sip, unsigned sport,
 767                         unsigned len)
 768 {
 769 }
 770
 771 rxhand_f *net_get_udp_handler(void)
 772 {
 773         return udp_packet_handler;
 774 }
 775
 776 void net_set_udp_handler(rxhand_f *f)
 777 {
 778         debug_cond(DEBUG_INT_STATE, "--- net_loop UDP handler set (%p)\n", f);
 779         if (f == NULL)
 780                 udp_packet_handler = dummy_handler;
 781         else
 782                 udp_packet_handler = f;
 783 }
 784
 785 rxhand_f *net_get_arp_handler(void)
 786 {
 787         return arp_packet_handler;
 788 }
 789
 790 void net_set_arp_handler(rxhand_f *f)
 791 {
 792         debug_cond(DEBUG_INT_STATE, "--- net_loop ARP handler set (%p)\n", f);
 793         if (f == NULL)
 794                 arp_packet_handler = dummy_handler;
 795         else
 796                 arp_packet_handler = f;
 797 }
 798
 799 #ifdef CONFIG_CMD_TFTPPUT
 800 void net_set_icmp_handler(rxhand_icmp_f *f)
 801 {
 802         packet_icmp_handler = f;
 803 }
 804 #endif
 805
 806 void net_set_timeout_handler(ulong iv, thand_f *f)
 807 {
 808         if (iv == 0) {
 809                 debug_cond(DEBUG_INT_STATE,
 810                            "--- net_loop timeout handler cancelled\n");
 811                 time_handler = (thand_f *)0;
 812         } else {
 813                 debug_cond(DEBUG_INT_STATE,
 814                            "--- net_loop timeout handler set (%p)\n", f);
 815                 time_handler = f;
 816                 time_start = get_timer(0);
 817                 time_delta = iv * CONFIG_SYS_HZ / 1000;
 818         }
 819 }
 820
 821 uchar *net_get_async_tx_pkt_buf(void)
 822 {
 823         if (arp_is_waiting())
 824                 return arp_tx_packet; /* If we are waiting, we already sent */
 825         else
 826                 return net_tx_packet;
 827 }
 828
 829 int net_send_udp_packet(uchar *ether, struct in_addr dest, int dport, int sport,
 830                 int payload_len)
 831 {
 832         return net_send_ip_packet(ether, dest, dport, sport, payload_len,
 833                                   IPPROTO_UDP, 0, 0, 0);
 834 }
 835
 836 int net_send_ip_packet(uchar *ether, struct in_addr dest, int dport, int sport,
 837                        int payload_len, int proto, u8 action, u32 tcp_seq_num,
 838                        u32 tcp_ack_num)
 839 {
 840         uchar *pkt;
 841         int eth_hdr_size;
 842         int pkt_hdr_size;
 843
 844         /* make sure the net_tx_packet is initialized (net_init() was called) */
 845         assert(net_tx_packet != NULL);
 846         if (net_tx_packet == NULL)
 847                 return -1;
 848
 849         /* convert to new style broadcast */
 850         if (dest.s_addr == 0)
 851                 dest.s_addr = 0xFFFFFFFF;
 852
 853         /* if broadcast, make the ether address a broadcast and don't do ARP */
 854         if (dest.s_addr == 0xFFFFFFFF)
 855                 ether = (uchar *)net_bcast_ethaddr;
 856
 857         pkt = (uchar *)net_tx_packet;
 858
 859         eth_hdr_size = net_set_ether(pkt, ether, PROT_IP);
 860
 861         switch (proto) {
 862         case IPPROTO_UDP:
 863                 net_set_udp_header(pkt + eth_hdr_size, dest, dport, sport,
 864                                    payload_len);
 865                 pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
 866                 break;
 867         default:
 868                 return -EINVAL;
 869         }
 870
 871         /* if MAC address was not discovered yet, do an ARP request */
 872         if (memcmp(ether, net_null_ethaddr, 6) == 0) {
 873                 debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
 874
 875                 /* save the ip and eth addr for the packet to send after arp */
 876                 net_arp_wait_packet_ip = dest;
 877                 arp_wait_packet_ethaddr = ether;
 878
 879                 /* size of the waiting packet */
 880                 arp_wait_tx_packet_size = pkt_hdr_size + payload_len;
 881
 882                 /* and do the ARP request */
 883                 arp_wait_try = 1;
 884                 arp_wait_timer_start = get_timer(0);
 885                 arp_request();
 886                 return 1;       /* waiting */
 887         } else {
 888                 debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
 889                            &dest, ether);
 890                 net_send_packet(net_tx_packet, pkt_hdr_size + payload_len);
 891                 return 0;       /* transmitted */
 892         }
 893 }
 894
 895 #ifdef CONFIG_IP_DEFRAG
 896 /*
 897  * This function collects fragments in a single packet, according
 898  * to the algorithm in RFC815. It returns NULL or the pointer to
 899  * a complete packet, in static storage
 900  */
 901 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG)
 902
 903 #define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
 904
 905 /*
 906  * this is the packet being assembled, either data or frag control.
 907  * Fragments go by 8 bytes, so this union must be 8 bytes long
 908  */
 909 struct hole {
 910         /* first_byte is address of this structure */
 911         u16 last_byte;  /* last byte in this hole + 1 (begin of next hole) */
 912         u16 next_hole;  /* index of next (in 8-b blocks), 0 == none */
 913         u16 prev_hole;  /* index of prev, 0 == none */
 914         u16 unused;
 915 };
 916
 917 static struct ip_udp_hdr *__net_defragment(struct ip_udp_hdr *ip, int *lenp)
 918 {
 919         static uchar pkt_buff[IP_PKTSIZE] __aligned(PKTALIGN);
 920         static u16 first_hole, total_len;
 921         struct hole *payload, *thisfrag, *h, *newh;
 922         struct ip_udp_hdr *localip = (struct ip_udp_hdr *)pkt_buff;
 923         uchar *indata = (uchar *)ip;
 924         int offset8, start, len, done = 0;
 925         u16 ip_off = ntohs(ip->ip_off);
 926
 927         if (ip->ip_len < IP_MIN_FRAG_DATAGRAM_SIZE)
 928                 return NULL;
 929
 930         /* payload starts after IP header, this fragment is in there */
 931         payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
 932         offset8 =  (ip_off & IP_OFFS);
 933         thisfrag = payload + offset8;
 934         start = offset8 * 8;
 935         len = ntohs(ip->ip_len) - IP_HDR_SIZE;
 936
 937         if (start + len > IP_MAXUDP) /* fragment extends too far */
 938                 return NULL;
 939
 940         if (!total_len || localip->ip_id != ip->ip_id) {
 941                 /* new (or different) packet, reset structs */
 942                 total_len = 0xffff;
 943                 payload[0].last_byte = ~0;
 944                 payload[0].next_hole = 0;
 945                 payload[0].prev_hole = 0;
 946                 first_hole = 0;
 947                 /* any IP header will work, copy the first we received */
 948                 memcpy(localip, ip, IP_HDR_SIZE);
 949         }
 950
 951         /*
 952          * What follows is the reassembly algorithm. We use the payload
 953          * array as a linked list of hole descriptors, as each hole starts
 954          * at a multiple of 8 bytes. However, last byte can be whatever value,
 955          * so it is represented as byte count, not as 8-byte blocks.
 956          */
 957
 958         h = payload + first_hole;
 959         while (h->last_byte < start) {
 960                 if (!h->next_hole) {
 961                         /* no hole that far away */
 962                         return NULL;
 963                 }
 964                 h = payload + h->next_hole;
 965         }
 966
 967         /* last fragment may be 1..7 bytes, the "+7" forces acceptance */
 968         if (offset8 + ((len + 7) / 8) <= h - payload) {
 969                 /* no overlap with holes (dup fragment?) */
 970                 return NULL;
 971         }
 972
 973         if (!(ip_off & IP_FLAGS_MFRAG)) {
 974                 /* no more fragmentss: truncate this (last) hole */
 975                 total_len = start + len;
 976                 h->last_byte = start + len;
 977         }
 978
 979         /*
 980          * There is some overlap: fix the hole list. This code doesn't
 981          * deal with a fragment that overlaps with two different holes
 982          * (thus being a superset of a previously-received fragment).
 983          */
 984
 985         if ((h >= thisfrag) && (h->last_byte <= start + len)) {
 986                 /* complete overlap with hole: remove hole */
 987                 if (!h->prev_hole && !h->next_hole) {
 988                         /* last remaining hole */
 989                         done = 1;
 990                 } else if (!h->prev_hole) {
 991                         /* first hole */
 992                         first_hole = h->next_hole;
 993                         payload[h->next_hole].prev_hole = 0;
 994                 } else if (!h->next_hole) {
 995                         /* last hole */
 996                         payload[h->prev_hole].next_hole = 0;
 997                 } else {
 998                         /* in the middle of the list */
 999                         payload[h->next_hole].prev_hole = h->prev_hole;
1000                         payload[h->prev_hole].next_hole = h->next_hole;
1001                 }
1002
1003         } else if (h->last_byte <= start + len) {
1004                 /* overlaps with final part of the hole: shorten this hole */
1005                 h->last_byte = start;
1006
1007         } else if (h >= thisfrag) {
1008                 /* overlaps with initial part of the hole: move this hole */
1009                 newh = thisfrag + (len / 8);
1010                 *newh = *h;
1011                 h = newh;
1012                 if (h->next_hole)
1013                         payload[h->next_hole].prev_hole = (h - payload);
1014                 if (h->prev_hole)
1015                         payload[h->prev_hole].next_hole = (h - payload);
1016                 else
1017                         first_hole = (h - payload);
1018
1019         } else {
1020                 /* fragment sits in the middle: split the hole */
1021                 newh = thisfrag + (len / 8);
1022                 *newh = *h;
1023                 h->last_byte = start;
1024                 h->next_hole = (newh - payload);
1025                 newh->prev_hole = (h - payload);
1026                 if (newh->next_hole)
1027                         payload[newh->next_hole].prev_hole = (newh - payload);
1028         }
1029
1030         /* finally copy this fragment and possibly return whole packet */
1031         memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
1032         if (!done)
1033                 return NULL;
1034
1035         localip->ip_len = htons(total_len);
1036         *lenp = total_len + IP_HDR_SIZE;
1037         return localip;
1038 }
1039
1040 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1041         int *lenp)
1042 {
1043         u16 ip_off = ntohs(ip->ip_off);
1044         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1045                 return ip; /* not a fragment */
1046         return __net_defragment(ip, lenp);
1047 }
1048
1049 #else /* !CONFIG_IP_DEFRAG */
1050
1051 static inline struct ip_udp_hdr *net_defragment(struct ip_udp_hdr *ip,
1052         int *lenp)
1053 {
1054         u16 ip_off = ntohs(ip->ip_off);
1055         if (!(ip_off & (IP_OFFS | IP_FLAGS_MFRAG)))
1056                 return ip; /* not a fragment */
1057         return NULL;
1058 }
1059 #endif
1060
1061 /**
1062  * Receive an ICMP packet. We deal with REDIRECT and PING here, and silently
1063  * drop others.
1064  *
1065  * @parma ip    IP packet containing the ICMP
1066  */
1067 static void receive_icmp(struct ip_udp_hdr *ip, int len,
1068                         struct in_addr src_ip, struct ethernet_hdr *et)
1069 {
1070         struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
1071
1072         switch (icmph->type) {
1073         case ICMP_REDIRECT:
1074                 if (icmph->code != ICMP_REDIR_HOST)
1075                         return;
1076                 printf(" ICMP Host Redirect to %pI4 ",
1077                        &icmph->un.gateway);
1078                 break;
1079         default:
1080 #if defined(CONFIG_CMD_PING)
1081                 ping_receive(et, ip, len);
1082 #endif
1083 #ifdef CONFIG_CMD_TFTPPUT
1084                 if (packet_icmp_handler)
1085                         packet_icmp_handler(icmph->type, icmph->code,
1086                                             ntohs(ip->udp_dst), src_ip,
1087                                             ntohs(ip->udp_src), icmph->un.data,
1088                                             ntohs(ip->udp_len));
1089 #endif
1090                 break;
1091         }
1092 }
1093
1094 void net_process_received_packet(uchar *in_packet, int len)
1095 {
1096         struct ethernet_hdr *et;
1097         struct ip_udp_hdr *ip;
1098         struct in_addr dst_ip;
1099         struct in_addr src_ip;
1100         int eth_proto;
1101 #if defined(CONFIG_CMD_CDP)
1102         int iscdp;
1103 #endif
1104         ushort cti = 0, vlanid = VLAN_NONE, myvlanid, mynvlanid;
1105
1106         debug_cond(DEBUG_NET_PKT, "packet received\n");
1107
1108 #if defined(CONFIG_CMD_PCAP)
1109         pcap_post(in_packet, len, false);
1110 #endif
1111         net_rx_packet = in_packet;
1112         net_rx_packet_len = len;
1113         et = (struct ethernet_hdr *)in_packet;
1114
1115         /* too small packet? */
1116         if (len < ETHER_HDR_SIZE)
1117                 return;
1118
1119 #if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
1120         if (push_packet) {
1121                 (*push_packet)(in_packet, len);
1122                 return;
1123         }
1124 #endif
1125
1126 #if defined(CONFIG_CMD_CDP)
1127         /* keep track if packet is CDP */
1128         iscdp = is_cdp_packet(et->et_dest);
1129 #endif
1130
1131         myvlanid = ntohs(net_our_vlan);
1132         if (myvlanid == (ushort)-1)
1133                 myvlanid = VLAN_NONE;
1134         mynvlanid = ntohs(net_native_vlan);
1135         if (mynvlanid == (ushort)-1)
1136                 mynvlanid = VLAN_NONE;
1137
1138         eth_proto = ntohs(et->et_protlen);
1139
1140         if (eth_proto < 1514) {
1141                 struct e802_hdr *et802 = (struct e802_hdr *)et;
1142                 /*
1143                  *      Got a 802.2 packet.  Check the other protocol field.
1144                  *      XXX VLAN over 802.2+SNAP not implemented!
1145                  */
1146                 eth_proto = ntohs(et802->et_prot);
1147
1148                 ip = (struct ip_udp_hdr *)(in_packet + E802_HDR_SIZE);
1149                 len -= E802_HDR_SIZE;
1150
1151         } else if (eth_proto != PROT_VLAN) {    /* normal packet */
1152                 ip = (struct ip_udp_hdr *)(in_packet + ETHER_HDR_SIZE);
1153                 len -= ETHER_HDR_SIZE;
1154
1155         } else {                        /* VLAN packet */
1156                 struct vlan_ethernet_hdr *vet =
1157                         (struct vlan_ethernet_hdr *)et;
1158
1159                 debug_cond(DEBUG_NET_PKT, "VLAN packet received\n");
1160
1161                 /* too small packet? */
1162                 if (len < VLAN_ETHER_HDR_SIZE)
1163                         return;
1164
1165                 /* if no VLAN active */
1166                 if ((ntohs(net_our_vlan) & VLAN_IDMASK) == VLAN_NONE
1167 #if defined(CONFIG_CMD_CDP)
1168                                 && iscdp == 0
1169 #endif
1170                                 )
1171                         return;
1172
1173                 cti = ntohs(vet->vet_tag);
1174                 vlanid = cti & VLAN_IDMASK;
1175                 eth_proto = ntohs(vet->vet_type);
1176
1177                 ip = (struct ip_udp_hdr *)(in_packet + VLAN_ETHER_HDR_SIZE);
1178                 len -= VLAN_ETHER_HDR_SIZE;
1179         }
1180
1181         debug_cond(DEBUG_NET_PKT, "Receive from protocol 0x%x\n", eth_proto);
1182
1183 #if defined(CONFIG_CMD_CDP)
1184         if (iscdp) {
1185                 cdp_receive((uchar *)ip, len);
1186                 return;
1187         }
1188 #endif
1189
1190         if ((myvlanid & VLAN_IDMASK) != VLAN_NONE) {
1191                 if (vlanid == VLAN_NONE)
1192                         vlanid = (mynvlanid & VLAN_IDMASK);
1193                 /* not matched? */
1194                 if (vlanid != (myvlanid & VLAN_IDMASK))
1195                         return;
1196         }
1197
1198         switch (eth_proto) {
1199         case PROT_ARP:
1200                 arp_receive(et, ip, len);
1201                 break;
1202
1203 #ifdef CONFIG_CMD_RARP
1204         case PROT_RARP:
1205                 rarp_receive(ip, len);
1206                 break;
1207 #endif
1208         case PROT_IP:
1209                 debug_cond(DEBUG_NET_PKT, "Got IP\n");
1210                 /* Before we start poking the header, make sure it is there */
1211                 if (len < IP_UDP_HDR_SIZE) {
1212                         debug("len bad %d < %lu\n", len,
1213                               (ulong)IP_UDP_HDR_SIZE);
1214                         return;
1215                 }
1216                 /* Check the packet length */
1217                 if (len < ntohs(ip->ip_len)) {
1218                         debug("len bad %d < %d\n", len, ntohs(ip->ip_len));
1219                         return;
1220                 }
1221                 len = ntohs(ip->ip_len);
1222                 debug_cond(DEBUG_NET_PKT, "len=%d, v=%02x\n",
1223                            len, ip->ip_hl_v & 0xff);
1224
1225                 /* Can't deal with anything except IPv4 */
1226                 if ((ip->ip_hl_v & 0xf0) != 0x40)
1227                         return;
1228                 /* Can't deal with IP options (headers != 20 bytes) */
1229                 if ((ip->ip_hl_v & 0x0f) > 0x05)
1230                         return;
1231                 /* Check the Checksum of the header */
1232                 if (!ip_checksum_ok((uchar *)ip, IP_HDR_SIZE)) {
1233                         debug("checksum bad\n");
1234                         return;
1235                 }
1236                 /* If it is not for us, ignore it */
1237                 dst_ip = net_read_ip(&ip->ip_dst);
1238                 if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
1239                     dst_ip.s_addr != 0xFFFFFFFF) {
1240                                 return;
1241                 }
1242                 /* Read source IP address for later use */
1243                 src_ip = net_read_ip(&ip->ip_src);
1244                 /*
1245                  * The function returns the unchanged packet if it's not
1246                  * a fragment, and either the complete packet or NULL if
1247                  * it is a fragment (if !CONFIG_IP_DEFRAG, it returns NULL)
1248                  */
1249                 ip = net_defragment(ip, &len);
1250                 if (!ip)
1251                         return;
1252                 /*
1253                  * watch for ICMP host redirects
1254                  *
1255                  * There is no real handler code (yet). We just watch
1256                  * for ICMP host redirect messages. In case anybody
1257                  * sees these messages: please contact me
1258                  * (wd@denx.de), or - even better - send me the
1259                  * necessary fixes :-)
1260                  *
1261                  * Note: in all cases where I have seen this so far
1262                  * it was a problem with the router configuration,
1263                  * for instance when a router was configured in the
1264                  * BOOTP reply, but the TFTP server was on the same
1265                  * subnet. So this is probably a warning that your
1266                  * configuration might be wrong. But I'm not really
1267                  * sure if there aren't any other situations.
1268                  *
1269                  * Simon Glass <sjg@chromium.org>: We get an ICMP when
1270                  * we send a tftp packet to a dead connection, or when
1271                  * there is no server at the other end.
1272                  */
1273                 if (ip->ip_p == IPPROTO_ICMP) {
1274                         receive_icmp(ip, len, src_ip, et);
1275                         return;
1276                 } else if (ip->ip_p != IPPROTO_UDP) {   /* Only UDP packets */
1277                         return;
1278                 }
1279
1280                 if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len))
1281                         return;
1282
1283                 debug_cond(DEBUG_DEV_PKT,
1284                            "received UDP (to=%pI4, from=%pI4, len=%d)\n",
1285                            &dst_ip, &src_ip, len);
1286
1287                 if (IS_ENABLED(CONFIG_UDP_CHECKSUM) && ip->udp_xsum != 0) {
1288                         ulong   xsum;
1289                         u8 *sumptr;
1290                         ushort  sumlen;
1291
1292                         xsum  = ip->ip_p;
1293                         xsum += (ntohs(ip->udp_len));
1294                         xsum += (ntohl(ip->ip_src.s_addr) >> 16) & 0x0000ffff;
1295                         xsum += (ntohl(ip->ip_src.s_addr) >>  0) & 0x0000ffff;
1296                         xsum += (ntohl(ip->ip_dst.s_addr) >> 16) & 0x0000ffff;
1297                         xsum += (ntohl(ip->ip_dst.s_addr) >>  0) & 0x0000ffff;
1298
1299                         sumlen = ntohs(ip->udp_len);
1300                         sumptr = (u8 *)&ip->udp_src;
1301
1302                         while (sumlen > 1) {
1303                                 /* inlined ntohs() to avoid alignment errors */
1304                                 xsum += (sumptr[0] << 8) + sumptr[1];
1305                                 sumptr += 2;
1306                                 sumlen -= 2;
1307                         }
1308                         if (sumlen > 0)
1309                                 xsum += (sumptr[0] << 8) + sumptr[0];
1310                         while ((xsum >> 16) != 0) {
1311                                 xsum = (xsum & 0x0000ffff) +
1312                                        ((xsum >> 16) & 0x0000ffff);
1313                         }
1314                         if ((xsum != 0x00000000) && (xsum != 0x0000ffff)) {
1315                                 printf(" UDP wrong checksum %08lx %08x\n",
1316                                        xsum, ntohs(ip->udp_xsum));
1317                                 return;
1318                         }
1319                 }
1320
1321 #if defined(CONFIG_NETCONSOLE) && !defined(CONFIG_SPL_BUILD)
1322                 nc_input_packet((uchar *)ip + IP_UDP_HDR_SIZE,
1323                                 src_ip,
1324                                 ntohs(ip->udp_dst),
1325                                 ntohs(ip->udp_src),
1326                                 ntohs(ip->udp_len) - UDP_HDR_SIZE);
1327 #endif
1328                 /*
1329                  * IP header OK.  Pass the packet to the current handler.
1330                  */
1331                 (*udp_packet_handler)((uchar *)ip + IP_UDP_HDR_SIZE,
1332                                       ntohs(ip->udp_dst),
1333                                       src_ip,
1334                                       ntohs(ip->udp_src),
1335                                       ntohs(ip->udp_len) - UDP_HDR_SIZE);
1336                 break;
1337 #ifdef CONFIG_CMD_WOL
1338         case PROT_WOL:
1339                 wol_receive(ip, len);
1340                 break;
1341 #endif
1342 #ifdef CONFIG_PHY_NCSI
1343         case PROT_NCSI:
1344                 ncsi_receive(et, ip, len);
1345                 break;
1346 #endif
1347         }
1348 }
1349
1350 /**********************************************************************/
1351
1352 static int net_check_prereq(enum proto_t protocol)
1353 {
1354         switch (protocol) {
1355                 /* Fall through */
1356 #if defined(CONFIG_CMD_PING)
1357         case PING:
1358                 if (net_ping_ip.s_addr == 0) {
1359                         puts("*** ERROR: ping address not given\n");
1360                         return 1;
1361                 }
1362                 goto common;
1363 #endif
1364 #if defined(CONFIG_CMD_DNS)
1365         case DNS:
1366                 if (net_dns_server.s_addr == 0) {
1367                         puts("*** ERROR: DNS server address not given\n");
1368                         return 1;
1369                 }
1370                 goto common;
1371 #endif
1372 #if defined(CONFIG_PROT_UDP)
1373         case UDP:
1374                 if (udp_prereq())
1375                         return 1;
1376                 goto common;
1377 #endif
1378
1379 #if defined(CONFIG_CMD_NFS)
1380         case NFS:
1381 #endif
1382                 /* Fall through */
1383         case TFTPGET:
1384         case TFTPPUT:
1385                 if (net_server_ip.s_addr == 0 && !is_serverip_in_cmd()) {
1386                         puts("*** ERROR: `serverip' not set\n");
1387                         return 1;
1388                 }
1389 #if     defined(CONFIG_CMD_PING) || \
1390         defined(CONFIG_CMD_DNS) || defined(CONFIG_PROT_UDP)
1391 common:
1392 #endif
1393                 /* Fall through */
1394
1395         case NETCONS:
1396         case FASTBOOT:
1397         case TFTPSRV:
1398                 if (net_ip.s_addr == 0) {
1399                         puts("*** ERROR: `ipaddr' not set\n");
1400                         return 1;
1401                 }
1402                 /* Fall through */
1403
1404 #ifdef CONFIG_CMD_RARP
1405         case RARP:
1406 #endif
1407 #ifdef CONFIG_PHY_NCSI
1408         case NCSI:
1409 #endif
1410         case BOOTP:
1411         case CDP:
1412         case DHCP:
1413         case LINKLOCAL:
1414                 if (memcmp(net_ethaddr, "\0\0\0\0\0\0", 6) == 0) {
1415                         int num = eth_get_dev_index();
1416
1417                         switch (num) {
1418                         case -1:
1419                                 puts("*** ERROR: No ethernet found.\n");
1420                                 return 1;
1421                         case 0:
1422                                 puts("*** ERROR: `ethaddr' not set\n");
1423                                 break;
1424                         default:
1425                                 printf("*** ERROR: `eth%daddr' not set\n",
1426                                        num);
1427                                 break;
1428                         }
1429
1430                         net_start_again();
1431                         return 2;
1432                 }
1433                 /* Fall through */
1434         default:
1435                 return 0;
1436         }
1437         return 0;               /* OK */
1438 }
1439 /**********************************************************************/
1440
1441 int
1442 net_eth_hdr_size(void)
1443 {
1444         ushort myvlanid;
1445
1446         myvlanid = ntohs(net_our_vlan);
1447         if (myvlanid == (ushort)-1)
1448                 myvlanid = VLAN_NONE;
1449
1450         return ((myvlanid & VLAN_IDMASK) == VLAN_NONE) ? ETHER_HDR_SIZE :
1451                 VLAN_ETHER_HDR_SIZE;
1452 }
1453
1454 int net_set_ether(uchar *xet, const uchar *dest_ethaddr, uint prot)
1455 {
1456         struct ethernet_hdr *et = (struct ethernet_hdr *)xet;
1457         ushort myvlanid;
1458
1459         myvlanid = ntohs(net_our_vlan);
1460         if (myvlanid == (ushort)-1)
1461                 myvlanid = VLAN_NONE;
1462
1463         memcpy(et->et_dest, dest_ethaddr, 6);
1464         memcpy(et->et_src, net_ethaddr, 6);
1465         if ((myvlanid & VLAN_IDMASK) == VLAN_NONE) {
1466                 et->et_protlen = htons(prot);
1467                 return ETHER_HDR_SIZE;
1468         } else {
1469                 struct vlan_ethernet_hdr *vet =
1470                         (struct vlan_ethernet_hdr *)xet;
1471
1472                 vet->vet_vlan_type = htons(PROT_VLAN);
1473                 vet->vet_tag = htons((0 << 5) | (myvlanid & VLAN_IDMASK));
1474                 vet->vet_type = htons(prot);
1475                 return VLAN_ETHER_HDR_SIZE;
1476         }
1477 }
1478
1479 int net_update_ether(struct ethernet_hdr *et, uchar *addr, uint prot)
1480 {
1481         ushort protlen;
1482
1483         memcpy(et->et_dest, addr, 6);
1484         memcpy(et->et_src, net_ethaddr, 6);
1485         protlen = ntohs(et->et_protlen);
1486         if (protlen == PROT_VLAN) {
1487                 struct vlan_ethernet_hdr *vet =
1488                         (struct vlan_ethernet_hdr *)et;
1489                 vet->vet_type = htons(prot);
1490                 return VLAN_ETHER_HDR_SIZE;
1491         } else if (protlen > 1514) {
1492                 et->et_protlen = htons(prot);
1493                 return ETHER_HDR_SIZE;
1494         } else {
1495                 /* 802.2 + SNAP */
1496                 struct e802_hdr *et802 = (struct e802_hdr *)et;
1497                 et802->et_prot = htons(prot);
1498                 return E802_HDR_SIZE;
1499         }
1500 }
1501
1502 void net_set_ip_header(uchar *pkt, struct in_addr dest, struct in_addr source,
1503                        u16 pkt_len, u8 proto)
1504 {
1505         struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1506
1507         /*
1508          *      Construct an IP header.
1509          */
1510         /* IP_HDR_SIZE / 4 (not including UDP) */
1511         ip->ip_hl_v  = 0x45;
1512         ip->ip_tos   = 0;
1513         ip->ip_len   = htons(pkt_len);
1514         ip->ip_p     = proto;
1515         ip->ip_id    = htons(net_ip_id++);
1516         ip->ip_off   = htons(IP_FLAGS_DFRAG);   /* Don't fragment */
1517         ip->ip_ttl   = 255;
1518         ip->ip_sum   = 0;
1519         /* already in network byte order */
1520         net_copy_ip((void *)&ip->ip_src, &source);
1521         /* already in network byte order */
1522         net_copy_ip((void *)&ip->ip_dst, &dest);
1523
1524         ip->ip_sum   = compute_ip_checksum(ip, IP_HDR_SIZE);
1525 }
1526
1527 void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
1528                         int len)
1529 {
1530         struct ip_udp_hdr *ip = (struct ip_udp_hdr *)pkt;
1531
1532         /*
1533          *      If the data is an odd number of bytes, zero the
1534          *      byte after the last byte so that the checksum
1535          *      will work.
1536          */
1537         if (len & 1)
1538                 pkt[IP_UDP_HDR_SIZE + len] = 0;
1539
1540         net_set_ip_header(pkt, dest, net_ip, IP_UDP_HDR_SIZE + len,
1541                           IPPROTO_UDP);
1542
1543         ip->udp_src  = htons(sport);
1544         ip->udp_dst  = htons(dport);
1545         ip->udp_len  = htons(UDP_HDR_SIZE + len);
1546         ip->udp_xsum = 0;
1547 }
1548
1549 void copy_filename(char *dst, const char *src, int size)
1550 {
1551         if (src && *src && (*src == '"')) {
1552                 ++src;
1553                 --size;
1554         }
1555
1556         while ((--size > 0) && src && *src && (*src != '"'))
1557                 *dst++ = *src++;
1558         *dst = '\0';
1559 }
1560
1561 int is_serverip_in_cmd(void)
1562 {
1563         return !!strchr(net_boot_file_name, ':');
1564 }
1565
1566 int net_parse_bootfile(struct in_addr *ipaddr, char *filename, int max_len)
1567 {
1568         char *colon;
1569         struct in_addr ip;
1570         ip.s_addr = 0;
1571
1572         if (net_boot_file_name[0] == '\0')
1573                 return 0;
1574
1575         colon = strchr(net_boot_file_name, ':');
1576         if (colon) {
1577                 ip = string_to_ip(net_boot_file_name);
1578                 if (ipaddr && ip.s_addr)
1579                         *ipaddr = ip;
1580         }
1581         if (ip.s_addr) {
1582                 strncpy(filename, colon + 1, max_len);
1583         } else {
1584                 strncpy(filename, net_boot_file_name, max_len);
1585         }
1586         filename[max_len - 1] = '\0';
1587
1588         return 1;
1589 }
1590
1591 void ip_to_string(struct in_addr x, char *s)
1592 {
1593         x.s_addr = ntohl(x.s_addr);
1594         sprintf(s, "%d.%d.%d.%d",
1595                 (int) ((x.s_addr >> 24) & 0xff),
1596                 (int) ((x.s_addr >> 16) & 0xff),
1597                 (int) ((x.s_addr >> 8) & 0xff),
1598                 (int) ((x.s_addr >> 0) & 0xff)
1599         );
1600 }
1601
1602 void vlan_to_string(ushort x, char *s)
1603 {
1604         x = ntohs(x);
1605
1606         if (x == (ushort)-1)
1607                 x = VLAN_NONE;
1608
1609         if (x == VLAN_NONE)
1610                 strcpy(s, "none");
1611         else
1612                 sprintf(s, "%d", x & VLAN_IDMASK);
1613 }
1614
1615 ushort string_to_vlan(const char *s)
1616 {
1617         ushort id;
1618
1619         if (s == NULL)
1620                 return htons(VLAN_NONE);
1621
1622         if (*s < '0' || *s > '9')
1623                 id = VLAN_NONE;
1624         else
1625                 id = (ushort)dectoul(s, NULL);
1626
1627         return htons(id);
1628 }
1629
1630 ushort env_get_vlan(char *var)
1631 {
1632         return string_to_vlan(env_get(var));
1633 }