cmd/net.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2000
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 /*
   8  * Boot support
   9  */
  10 #include <common.h>
  11 #include <bootstage.h>
  12 #include <command.h>
  13 #include <env.h>
  14 #include <image.h>
  15 #include <net.h>
  16
  17 static int netboot_common(enum proto_t, struct cmd_tbl *, int, char * const []);
  18
  19 #ifdef CONFIG_CMD_BOOTP
  20 static int do_bootp(struct cmd_tbl *cmdtp, int flag, int argc,
  21                     char *const argv[])
  22 {
  23         return netboot_common(BOOTP, cmdtp, argc, argv);
  24 }
  25
  26 U_BOOT_CMD(
  27         bootp,  3,      1,      do_bootp,
  28         "boot image via network using BOOTP/TFTP protocol",
  29         "[loadAddress] [[hostIPaddr:]bootfilename]"
  30 );
  31 #endif
  32
  33 #ifdef CONFIG_CMD_TFTPBOOT
  34 int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  35 {
  36         int ret;
  37
  38         bootstage_mark_name(BOOTSTAGE_KERNELREAD_START, "tftp_start");
  39         ret = netboot_common(TFTPGET, cmdtp, argc, argv);
  40         bootstage_mark_name(BOOTSTAGE_KERNELREAD_STOP, "tftp_done");
  41         return ret;
  42 }
  43
  44 U_BOOT_CMD(
  45         tftpboot,       3,      1,      do_tftpb,
  46         "boot image via network using TFTP protocol",
  47         "[loadAddress] [[hostIPaddr:]bootfilename]"
  48 );
  49 #endif
  50
  51 #ifdef CONFIG_CMD_TFTPPUT
  52 static int do_tftpput(struct cmd_tbl *cmdtp, int flag, int argc,
  53                       char *const argv[])
  54 {
  55         return netboot_common(TFTPPUT, cmdtp, argc, argv);
  56 }
  57
  58 U_BOOT_CMD(
  59         tftpput,        4,      1,      do_tftpput,
  60         "TFTP put command, for uploading files to a server",
  61         "Address Size [[hostIPaddr:]filename]"
  62 );
  63 #endif
  64
  65 #ifdef CONFIG_CMD_TFTPSRV
  66 static int do_tftpsrv(struct cmd_tbl *cmdtp, int flag, int argc,
  67                       char *const argv[])
  68 {
  69         return netboot_common(TFTPSRV, cmdtp, argc, argv);
  70 }
  71
  72 U_BOOT_CMD(
  73         tftpsrv,        2,      1,      do_tftpsrv,
  74         "act as a TFTP server and boot the first received file",
  75         "[loadAddress]\n"
  76         "Listen for an incoming TFTP transfer, receive a file and boot it.\n"
  77         "The transfer is aborted if a transfer has not been started after\n"
  78         "about 50 seconds or if Ctrl-C is pressed."
  79 );
  80 #endif
  81
  82
  83 #ifdef CONFIG_CMD_RARP
  84 int do_rarpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  85 {
  86         return netboot_common(RARP, cmdtp, argc, argv);
  87 }
  88
  89 U_BOOT_CMD(
  90         rarpboot,       3,      1,      do_rarpb,
  91         "boot image via network using RARP/TFTP protocol",
  92         "[loadAddress] [[hostIPaddr:]bootfilename]"
  93 );
  94 #endif
  95
  96 #if defined(CONFIG_CMD_DHCP)
  97 static int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc,
  98                    char *const argv[])
  99 {
 100         return netboot_common(DHCP, cmdtp, argc, argv);
 101 }
 102
 103 U_BOOT_CMD(
 104         dhcp,   3,      1,      do_dhcp,
 105         "boot image via network using DHCP/TFTP protocol",
 106         "[loadAddress] [[hostIPaddr:]bootfilename]"
 107 );
 108 #endif
 109
 110 #if defined(CONFIG_CMD_NFS)
 111 static int do_nfs(struct cmd_tbl *cmdtp, int flag, int argc,
 112                   char *const argv[])
 113 {
 114         return netboot_common(NFS, cmdtp, argc, argv);
 115 }
 116
 117 U_BOOT_CMD(
 118         nfs,    3,      1,      do_nfs,
 119         "boot image via network using NFS protocol",
 120         "[loadAddress] [[hostIPaddr:]bootfilename]"
 121 );
 122 #endif
 123
 124 static void netboot_update_env(void)
 125 {
 126         char tmp[22];
 127
 128         if (net_gateway.s_addr) {
 129                 ip_to_string(net_gateway, tmp);
 130                 env_set("gatewayip", tmp);
 131         }
 132
 133         if (net_netmask.s_addr) {
 134                 ip_to_string(net_netmask, tmp);
 135                 env_set("netmask", tmp);
 136         }
 137
 138 #ifdef CONFIG_CMD_BOOTP
 139         if (net_hostname[0])
 140                 env_set("hostname", net_hostname);
 141 #endif
 142
 143 #ifdef CONFIG_CMD_BOOTP
 144         if (net_root_path[0])
 145                 env_set("rootpath", net_root_path);
 146 #endif
 147
 148         if (net_ip.s_addr) {
 149                 ip_to_string(net_ip, tmp);
 150                 env_set("ipaddr", tmp);
 151         }
 152 #if !defined(CONFIG_BOOTP_SERVERIP)
 153         /*
 154          * Only attempt to change serverip if net/bootp.c:store_net_params()
 155          * could have set it
 156          */
 157         if (net_server_ip.s_addr) {
 158                 ip_to_string(net_server_ip, tmp);
 159                 env_set("serverip", tmp);
 160         }
 161 #endif
 162         if (net_dns_server.s_addr) {
 163                 ip_to_string(net_dns_server, tmp);
 164                 env_set("dnsip", tmp);
 165         }
 166 #if defined(CONFIG_BOOTP_DNS2)
 167         if (net_dns_server2.s_addr) {
 168                 ip_to_string(net_dns_server2, tmp);
 169                 env_set("dnsip2", tmp);
 170         }
 171 #endif
 172 #ifdef CONFIG_CMD_BOOTP
 173         if (net_nis_domain[0])
 174                 env_set("domain", net_nis_domain);
 175 #endif
 176
 177 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_TIMEOFFSET)
 178         if (net_ntp_time_offset) {
 179                 sprintf(tmp, "%d", net_ntp_time_offset);
 180                 env_set("timeoffset", tmp);
 181         }
 182 #endif
 183 #if defined(CONFIG_CMD_SNTP) && defined(CONFIG_BOOTP_NTPSERVER)
 184         if (net_ntp_server.s_addr) {
 185                 ip_to_string(net_ntp_server, tmp);
 186                 env_set("ntpserverip", tmp);
 187         }
 188 #endif
 189 }
 190
 191 static int netboot_common(enum proto_t proto, struct cmd_tbl *cmdtp, int argc,
 192                           char *const argv[])
 193 {
 194         char *s;
 195         char *end;
 196         int   rcode = 0;
 197         int   size;
 198         ulong addr;
 199
 200         net_boot_file_name_explicit = false;
 201
 202         /* pre-set image_load_addr */
 203         s = env_get("loadaddr");
 204         if (s != NULL)
 205                 image_load_addr = simple_strtoul(s, NULL, 16);
 206
 207         switch (argc) {
 208         case 1:
 209                 /* refresh bootfile name from env */
 210                 copy_filename(net_boot_file_name, env_get("bootfile"),
 211                               sizeof(net_boot_file_name));
 212                 break;
 213
 214         case 2: /*
 215                  * Only one arg - accept two forms:
 216                  * Just load address, or just boot file name. The latter
 217                  * form must be written in a format which can not be
 218                  * mis-interpreted as a valid number.
 219                  */
 220                 addr = simple_strtoul(argv[1], &end, 16);
 221                 if (end == (argv[1] + strlen(argv[1]))) {
 222                         image_load_addr = addr;
 223                         /* refresh bootfile name from env */
 224                         copy_filename(net_boot_file_name, env_get("bootfile"),
 225                                       sizeof(net_boot_file_name));
 226                 } else {
 227                         net_boot_file_name_explicit = true;
 228                         copy_filename(net_boot_file_name, argv[1],
 229                                       sizeof(net_boot_file_name));
 230                 }
 231                 break;
 232
 233         case 3:
 234                 image_load_addr = simple_strtoul(argv[1], NULL, 16);
 235                 net_boot_file_name_explicit = true;
 236                 copy_filename(net_boot_file_name, argv[2],
 237                               sizeof(net_boot_file_name));
 238
 239                 break;
 240
 241 #ifdef CONFIG_CMD_TFTPPUT
 242         case 4:
 243                 if (strict_strtoul(argv[1], 16, &image_save_addr) < 0 ||
 244                     strict_strtoul(argv[2], 16, &image_save_size) < 0) {
 245                         printf("Invalid address/size\n");
 246                         return CMD_RET_USAGE;
 247                 }
 248                 net_boot_file_name_explicit = true;
 249                 copy_filename(net_boot_file_name, argv[3],
 250                               sizeof(net_boot_file_name));
 251                 break;
 252 #endif
 253         default:
 254                 bootstage_error(BOOTSTAGE_ID_NET_START);
 255                 return CMD_RET_USAGE;
 256         }
 257         bootstage_mark(BOOTSTAGE_ID_NET_START);
 258
 259         size = net_loop(proto);
 260         if (size < 0) {
 261                 bootstage_error(BOOTSTAGE_ID_NET_NETLOOP_OK);
 262                 return CMD_RET_FAILURE;
 263         }
 264         bootstage_mark(BOOTSTAGE_ID_NET_NETLOOP_OK);
 265
 266         /* net_loop ok, update environment */
 267         netboot_update_env();
 268
 269         /* done if no file was loaded (no errors though) */
 270         if (size == 0) {
 271                 bootstage_error(BOOTSTAGE_ID_NET_LOADED);
 272                 return CMD_RET_SUCCESS;
 273         }
 274
 275         bootstage_mark(BOOTSTAGE_ID_NET_LOADED);
 276
 277         rcode = bootm_maybe_autostart(cmdtp, argv[0]);
 278
 279         if (rcode == CMD_RET_SUCCESS)
 280                 bootstage_mark(BOOTSTAGE_ID_NET_DONE);
 281         else
 282                 bootstage_error(BOOTSTAGE_ID_NET_DONE_ERR);
 283         return rcode;
 284 }
 285
 286 #if defined(CONFIG_CMD_PING)
 287 static int do_ping(struct cmd_tbl *cmdtp, int flag, int argc,
 288                    char *const argv[])
 289 {
 290         if (argc < 2)
 291                 return CMD_RET_USAGE;
 292
 293         net_ping_ip = string_to_ip(argv[1]);
 294         if (net_ping_ip.s_addr == 0)
 295                 return CMD_RET_USAGE;
 296
 297         if (net_loop(PING) < 0) {
 298                 printf("ping failed; host %s is not alive\n", argv[1]);
 299                 return CMD_RET_FAILURE;
 300         }
 301
 302         printf("host %s is alive\n", argv[1]);
 303
 304         return CMD_RET_SUCCESS;
 305 }
 306
 307 U_BOOT_CMD(
 308         ping,   2,      1,      do_ping,
 309         "send ICMP ECHO_REQUEST to network host",
 310         "pingAddress"
 311 );
 312 #endif
 313
 314 #if defined(CONFIG_CMD_CDP)
 315
 316 static void cdp_update_env(void)
 317 {
 318         char tmp[16];
 319
 320         if (cdp_appliance_vlan != htons(-1)) {
 321                 printf("CDP offered appliance VLAN %d\n",
 322                        ntohs(cdp_appliance_vlan));
 323                 vlan_to_string(cdp_appliance_vlan, tmp);
 324                 env_set("vlan", tmp);
 325                 net_our_vlan = cdp_appliance_vlan;
 326         }
 327
 328         if (cdp_native_vlan != htons(-1)) {
 329                 printf("CDP offered native VLAN %d\n", ntohs(cdp_native_vlan));
 330                 vlan_to_string(cdp_native_vlan, tmp);
 331                 env_set("nvlan", tmp);
 332                 net_native_vlan = cdp_native_vlan;
 333         }
 334 }
 335
 336 int do_cdp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 337 {
 338         int r;
 339
 340         r = net_loop(CDP);
 341         if (r < 0) {
 342                 printf("cdp failed; perhaps not a CISCO switch?\n");
 343                 return CMD_RET_FAILURE;
 344         }
 345
 346         cdp_update_env();
 347
 348         return CMD_RET_SUCCESS;
 349 }
 350
 351 U_BOOT_CMD(
 352         cdp,    1,      1,      do_cdp,
 353         "Perform CDP network configuration",
 354         "\n"
 355 );
 356 #endif
 357
 358 #if defined(CONFIG_CMD_SNTP)
 359 int do_sntp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 360 {
 361         char *toff;
 362
 363         if (argc < 2) {
 364                 net_ntp_server = env_get_ip("ntpserverip");
 365                 if (net_ntp_server.s_addr == 0) {
 366                         printf("ntpserverip not set\n");
 367                         return CMD_RET_FAILURE;
 368                 }
 369         } else {
 370                 net_ntp_server = string_to_ip(argv[1]);
 371                 if (net_ntp_server.s_addr == 0) {
 372                         printf("Bad NTP server IP address\n");
 373                         return CMD_RET_FAILURE;
 374                 }
 375         }
 376
 377         toff = env_get("timeoffset");
 378         if (toff == NULL)
 379                 net_ntp_time_offset = 0;
 380         else
 381                 net_ntp_time_offset = simple_strtol(toff, NULL, 10);
 382
 383         if (net_loop(SNTP) < 0) {
 384                 printf("SNTP failed: host %pI4 not responding\n",
 385                        &net_ntp_server);
 386                 return CMD_RET_FAILURE;
 387         }
 388
 389         return CMD_RET_SUCCESS;
 390 }
 391
 392 U_BOOT_CMD(
 393         sntp,   2,      1,      do_sntp,
 394         "synchronize RTC via network",
 395         "[NTP server IP]\n"
 396 );
 397 #endif
 398
 399 #if defined(CONFIG_CMD_DNS)
 400 int do_dns(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 401 {
 402         if (argc == 1)
 403                 return CMD_RET_USAGE;
 404
 405         /*
 406          * We should check for a valid hostname:
 407          * - Each label must be between 1 and 63 characters long
 408          * - the entire hostname has a maximum of 255 characters
 409          * - only the ASCII letters 'a' through 'z' (case-insensitive),
 410          *   the digits '0' through '9', and the hyphen
 411          * - cannot begin or end with a hyphen
 412          * - no other symbols, punctuation characters, or blank spaces are
 413          *   permitted
 414          * but hey - this is a minimalist implmentation, so only check length
 415          * and let the name server deal with things.
 416          */
 417         if (strlen(argv[1]) >= 255) {
 418                 printf("dns error: hostname too long\n");
 419                 return CMD_RET_FAILURE;
 420         }
 421
 422         net_dns_resolve = argv[1];
 423
 424         if (argc == 3)
 425                 net_dns_env_var = argv[2];
 426         else
 427                 net_dns_env_var = NULL;
 428
 429         if (net_loop(DNS) < 0) {
 430                 printf("dns lookup of %s failed, check setup\n", argv[1]);
 431                 return CMD_RET_FAILURE;
 432         }
 433
 434         return CMD_RET_SUCCESS;
 435 }
 436
 437 U_BOOT_CMD(
 438         dns,    3,      1,      do_dns,
 439         "lookup the IP of a hostname",
 440         "hostname [envvar]"
 441 );
 442
 443 #endif  /* CONFIG_CMD_DNS */
 444
 445 #if defined(CONFIG_CMD_LINK_LOCAL)
 446 static int do_link_local(struct cmd_tbl *cmdtp, int flag, int argc,
 447                          char *const argv[])
 448 {
 449         char tmp[22];
 450
 451         if (net_loop(LINKLOCAL) < 0)
 452                 return CMD_RET_FAILURE;
 453
 454         net_gateway.s_addr = 0;
 455         ip_to_string(net_gateway, tmp);
 456         env_set("gatewayip", tmp);
 457
 458         ip_to_string(net_netmask, tmp);
 459         env_set("netmask", tmp);
 460
 461         ip_to_string(net_ip, tmp);
 462         env_set("ipaddr", tmp);
 463         env_set("llipaddr", tmp); /* store this for next time */
 464
 465         return CMD_RET_SUCCESS;
 466 }
 467
 468 U_BOOT_CMD(
 469         linklocal,      1,      1,      do_link_local,
 470         "acquire a network IP address using the link-local protocol",
 471         ""
 472 );
 473
 474 #endif  /* CONFIG_CMD_LINK_LOCAL */