src/network/networkctl.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <stdbool.h>
  23 #include <getopt.h>
  24
  25 #include "sd-network.h"
  26 #include "sd-rtnl.h"
  27 #include "libudev.h"
  28
  29 #include "build.h"
  30 #include "util.h"
  31 #include "pager.h"
  32 #include "rtnl-util.h"
  33 #include "udev-util.h"
  34 #include "arphrd-list.h"
  35 #include "local-addresses.h"
  36 #include "socket-util.h"
  37
  38 static bool arg_no_pager = false;
  39 static bool arg_legend = true;
  40 static bool arg_all = false;
  41
  42 static void pager_open_if_enabled(void) {
  43
  44         if (arg_no_pager)
  45                 return;
  46
  47         pager_open(false);
  48 }
  49
  50 static int link_get_type_string(int iftype, struct udev_device *d, char **ret) {
  51         const char *t;
  52         char *p;
  53
  54         if (iftype == ARPHRD_ETHER && d) {
  55                 const char *devtype, *id = NULL;
  56                 /* WLANs have iftype ARPHRD_ETHER, but we want
  57                  * to show a more useful type string for
  58                  * them */
  59
  60                 devtype = udev_device_get_devtype(d);
  61                 if (streq_ptr(devtype, "wlan"))
  62                         id = "wlan";
  63                 else if (streq_ptr(devtype, "wwan"))
  64                         id = "wwan";
  65
  66                 if (id) {
  67                         p = strdup(id);
  68                         if (!p)
  69                                 return -ENOMEM;
  70
  71                         *ret = p;
  72                         return 1;
  73                 }
  74         }
  75
  76         t = arphrd_to_name(iftype);
  77         if (!t) {
  78                 *ret = NULL;
  79                 return 0;
  80         }
  81
  82         p = strdup(t);
  83         if (!p)
  84                 return -ENOMEM;
  85
  86         ascii_strlower(p);
  87         *ret = p;
  88
  89         return 0;
  90 }
  91
  92 typedef struct LinkInfo {
  93         const char *name;
  94         int ifindex;
  95         unsigned iftype;
  96 } LinkInfo;
  97
  98 static int link_info_compare(const void *a, const void *b) {
  99         const LinkInfo *x = a, *y = b;
 100
 101         return x->ifindex - y->ifindex;
 102 }
 103
 104 static int decode_and_sort_links(sd_rtnl_message *m, LinkInfo **ret) {
 105         _cleanup_free_ LinkInfo *links = NULL;
 106         size_t size = 0, c = 0;
 107         sd_rtnl_message *i;
 108         int r;
 109
 110         for (i = m; i; i = sd_rtnl_message_next(i)) {
 111                 const char *name;
 112                 unsigned iftype;
 113                 uint16_t type;
 114                 int ifindex;
 115
 116                 r = sd_rtnl_message_get_type(i, &type);
 117                 if (r < 0)
 118                         return r;
 119
 120                 if (type != RTM_NEWLINK)
 121                         continue;
 122
 123                 r = sd_rtnl_message_link_get_ifindex(i, &ifindex);
 124                 if (r < 0)
 125                         return r;
 126
 127                 r = sd_rtnl_message_read_string(i, IFLA_IFNAME, &name);
 128                 if (r < 0)
 129                         return r;
 130
 131                 r = sd_rtnl_message_link_get_type(i, &iftype);
 132                 if (r < 0)
 133                         return r;
 134
 135                 if (!GREEDY_REALLOC(links, size, c+1))
 136                         return -ENOMEM;
 137
 138                 links[c].name = name;
 139                 links[c].ifindex = ifindex;
 140                 links[c].iftype = iftype;
 141                 c++;
 142         }
 143
 144         qsort(links, c, sizeof(LinkInfo), link_info_compare);
 145
 146         *ret = links;
 147         links = NULL;
 148
 149         return (int) c;
 150 }
 151
 152 static void operational_state_to_color(const char *state, const char **on, const char **off) {
 153         assert(on);
 154         assert(off);
 155
 156         if (streq_ptr(state, "routable")) {
 157                 *on = ansi_highlight_green();
 158                 *off = ansi_highlight_off();
 159         } else if (streq_ptr(state, "degraded")) {
 160                 *on = ansi_highlight_yellow();
 161                 *off = ansi_highlight_off();
 162         } else
 163                 *on = *off = "";
 164 }
 165
 166 static void setup_state_to_color(const char *state, const char **on, const char **off) {
 167         assert(on);
 168         assert(off);
 169
 170         if (streq_ptr(state, "configured")) {
 171                 *on = ansi_highlight_green();
 172                 *off = ansi_highlight_off();
 173         } else if (streq_ptr(state, "configuring")) {
 174                 *on = ansi_highlight_yellow();
 175                 *off = ansi_highlight_off();
 176         } else if (streq_ptr(state, "failed") || streq_ptr(state, "linger")) {
 177                 *on = ansi_highlight_red();
 178                 *off = ansi_highlight_off();
 179         } else
 180                 *on = *off = "";
 181 }
 182
 183 static int list_links(char **args, unsigned n) {
 184         _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
 185         _cleanup_udev_unref_ struct udev *udev = NULL;
 186         _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
 187         _cleanup_free_ LinkInfo *links = NULL;
 188         int r, c, i;
 189
 190         pager_open_if_enabled();
 191
 192         r = sd_rtnl_open(&rtnl, 0);
 193         if (r < 0) {
 194                 log_error("Failed to connect to netlink: %s", strerror(-r));
 195                 return r;
 196         }
 197
 198         udev = udev_new();
 199         if (!udev) {
 200                 log_error("Failed to connect to udev: %m");
 201                 return -errno;
 202         }
 203
 204         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
 205         if (r < 0)
 206                 return rtnl_log_create_error(r);
 207
 208         r = sd_rtnl_message_request_dump(req, true);
 209         if (r < 0)
 210                 return rtnl_log_create_error(r);
 211
 212         r = sd_rtnl_call(rtnl, req, 0, &reply);
 213         if (r < 0) {
 214                 log_error("Failed to enumerate links: %s", strerror(-r));
 215                 return r;
 216         }
 217
 218         if (arg_legend)
 219                 printf("%3s %-16s %-18s %-11s %-10s\n", "IDX", "LINK", "TYPE", "OPERATIONAL", "SETUP");
 220
 221         c = decode_and_sort_links(reply, &links);
 222         if (c < 0)
 223                 return rtnl_log_parse_error(c);
 224
 225         for (i = 0; i < c; i++) {
 226                 _cleanup_free_ char *setup_state = NULL, *operational_state = NULL;
 227                 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
 228                 const char *on_color_operational, *off_color_operational,
 229                            *on_color_setup, *off_color_setup;
 230                  char devid[2 + DECIMAL_STR_MAX(int)];
 231                 _cleanup_free_ char *t = NULL;
 232
 233                 sd_network_link_get_operational_state(links[i].ifindex, &operational_state);
 234                 operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 235
 236                 sd_network_link_get_setup_state(links[i].ifindex, &setup_state);
 237                 setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
 238
 239                 sprintf(devid, "n%i", links[i].ifindex);
 240                 d = udev_device_new_from_device_id(udev, devid);
 241
 242                 link_get_type_string(links[i].iftype, d, &t);
 243
 244                 printf("%3i %-16s %-18s %s%-11s%s %s%-10s%s\n",
 245                        links[i].ifindex, links[i].name, strna(t),
 246                        on_color_operational, strna(operational_state), off_color_operational,
 247                        on_color_setup, strna(setup_state), off_color_setup);
 248         }
 249
 250         if (arg_legend)
 251                 printf("\n%i links listed.\n", c);
 252
 253         return 0;
 254 }
 255
 256 static int dump_addresses(sd_rtnl *rtnl, const char *prefix, int ifindex) {
 257         _cleanup_free_ struct local_address *local = NULL;
 258         int r, n, i;
 259
 260         n = local_addresses(rtnl, ifindex, &local);
 261         if (n < 0)
 262                 return n;
 263
 264         for (i = 0; i < n; i++) {
 265                 _cleanup_free_ char *pretty = NULL;
 266
 267                 r = in_addr_to_string(local[i].family, &local[i].address, &pretty);
 268                 if (r < 0)
 269                         return r;
 270
 271                 printf("%*s%s\n",
 272                        (int) strlen(prefix),
 273                        i == 0 ? prefix : "",
 274                        pretty);
 275         }
 276
 277         return 0;
 278 }
 279
 280 static void dump_list(const char *prefix, char **l) {
 281         char **i;
 282
 283         STRV_FOREACH(i, l) {
 284                 printf("%*s%s\n",
 285                        (int) strlen(prefix),
 286                        i == l ? prefix : "",
 287                        *i);
 288         }
 289 }
 290
 291 static int link_status_one(sd_rtnl *rtnl, struct udev *udev, const char *name) {
 292         _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **domains = NULL;
 293         _cleanup_free_ char *setup_state = NULL, *operational_state = NULL;
 294         _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
 295         _cleanup_udev_device_unref_ struct udev_device *d = NULL;
 296         char devid[2 + DECIMAL_STR_MAX(int)];
 297         _cleanup_free_ char *t = NULL;
 298         const char *driver = NULL, *path = NULL, *vendor = NULL, *model = NULL;
 299         const char *on_color_operational, *off_color_operational,
 300                    *on_color_setup, *off_color_setup;
 301         struct ether_addr e;
 302         unsigned iftype;
 303         int r, ifindex;
 304         bool have_mac;
 305         uint32_t mtu;
 306
 307         assert(rtnl);
 308         assert(udev);
 309         assert(name);
 310
 311         if (safe_atoi(name, &ifindex) >= 0 && ifindex > 0)
 312                 r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, ifindex);
 313         else {
 314                 r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
 315                 if (r < 0)
 316                         return rtnl_log_create_error(r);
 317
 318                 r = sd_rtnl_message_append_string(req, IFLA_IFNAME, name);
 319         }
 320
 321         if (r < 0)
 322                 return rtnl_log_create_error(r);
 323
 324         r = sd_rtnl_call(rtnl, req, 0, &reply);
 325         if (r < 0) {
 326                 log_error("Failed to query link: %s", strerror(-r));
 327                 return r;
 328         }
 329
 330         r = sd_rtnl_message_link_get_ifindex(reply, &ifindex);
 331         if (r < 0)
 332                 return rtnl_log_parse_error(r);
 333
 334         r = sd_rtnl_message_read_string(reply, IFLA_IFNAME, &name);
 335         if (r < 0)
 336                 return rtnl_log_parse_error(r);
 337
 338         r = sd_rtnl_message_link_get_type(reply, &iftype);
 339         if (r < 0)
 340                 return rtnl_log_parse_error(r);
 341
 342         have_mac = sd_rtnl_message_read_ether_addr(reply, IFLA_ADDRESS, &e) >= 0;
 343
 344         if (have_mac) {
 345                 const uint8_t *p;
 346                 bool all_zeroes = true;
 347
 348                 for (p = (uint8_t*) &e; p < (uint8_t*) &e + sizeof(e); p++)
 349                         if (*p != 0) {
 350                                 all_zeroes = false;
 351                                 break;
 352                         }
 353
 354                 if (all_zeroes)
 355                         have_mac = false;
 356         }
 357
 358         sd_rtnl_message_read_u32(reply, IFLA_MTU, &mtu);
 359
 360         sd_network_link_get_operational_state(ifindex, &operational_state);
 361         operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 362
 363         sd_network_link_get_setup_state(ifindex, &setup_state);
 364         setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
 365
 366         sd_network_link_get_dns(ifindex, &dns);
 367         sd_network_link_get_ntp(ifindex, &ntp);
 368         sd_network_link_get_domains(ifindex, &domains);
 369         r = sd_network_link_get_wildcard_domain(ifindex);
 370         if (r > 0) {
 371                 char *wildcard;
 372
 373                 wildcard = strdup("*");
 374                 if (!wildcard)
 375                         return log_oom();
 376
 377                 if (strv_consume(&domains, wildcard) < 0)
 378                         return log_oom();
 379         }
 380
 381         sprintf(devid, "n%i", ifindex);
 382         d = udev_device_new_from_device_id(udev, devid);
 383
 384         link_get_type_string(iftype, d, &t);
 385
 386         if (d) {
 387                 driver = udev_device_get_property_value(d, "ID_NET_DRIVER");
 388                 path = udev_device_get_property_value(d, "ID_PATH");
 389
 390                 vendor = udev_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE");
 391                 if (!vendor)
 392                         vendor = udev_device_get_property_value(d, "ID_VENDOR");
 393
 394                 model = udev_device_get_property_value(d, "ID_MODEL_FROM_DATABASE");
 395                 if (!model)
 396                         model = udev_device_get_property_value(d, "ID_MODEL");
 397         }
 398
 399
 400         printf("%s%s%s %i: %s\n", on_color_operational, draw_special_char(DRAW_BLACK_CIRCLE), off_color_operational, ifindex, name);
 401
 402         printf("        Type: %s\n"
 403                "       State: %s%s%s (%s%s%s)\n",
 404                strna(t),
 405                on_color_operational, strna(operational_state), off_color_operational,
 406                on_color_setup, strna(setup_state), off_color_setup);
 407
 408         if (path)
 409                 printf("        Path: %s\n", path);
 410         if (driver)
 411                 printf("      Driver: %s\n", driver);
 412         if (vendor)
 413                 printf("      Vendor: %s\n", vendor);
 414         if (model)
 415                 printf("       Model: %s\n", model);
 416
 417         if (have_mac) {
 418                 char ea[ETHER_ADDR_TO_STRING_MAX];
 419                 printf("  HW Address: %s\n", ether_addr_to_string(&e, ea));
 420         }
 421
 422         if (mtu > 0)
 423                 printf("         MTU: %u\n", mtu);
 424
 425         dump_addresses(rtnl, "     Address: ", ifindex);
 426
 427         if (!strv_isempty(dns))
 428                 dump_list("         DNS: ", dns);
 429         if (!strv_isempty(domains))
 430                 dump_list("     Domains: ", domains);
 431         if (!strv_isempty(ntp))
 432                 dump_list("         NTP: ", ntp);
 433
 434         return 0;
 435 }
 436
 437 static int link_status(char **args, unsigned n) {
 438         _cleanup_udev_unref_ struct udev *udev = NULL;
 439         _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
 440         char **name;
 441         int r;
 442
 443         r = sd_rtnl_open(&rtnl, 0);
 444         if (r < 0) {
 445                 log_error("Failed to connect to netlink: %s", strerror(-r));
 446                 return r;
 447         }
 448
 449         udev = udev_new();
 450         if (!udev) {
 451                 log_error("Failed to connect to udev: %m");
 452                 return -errno;
 453         }
 454
 455         if (n <= 1 && !arg_all) {
 456                 _cleanup_free_ char *operational_state = NULL;
 457                 _cleanup_strv_free_ char **dns = NULL, **ntp = NULL;
 458                 _cleanup_free_ struct local_address *addresses = NULL;
 459                 const char *on_color_operational, *off_color_operational;
 460                 int i, c;
 461
 462                 sd_network_get_operational_state(&operational_state);
 463                 operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 464
 465                 printf("       State: %s%s%s\n", on_color_operational, strna(operational_state), off_color_operational);
 466
 467                 c = local_addresses(rtnl, 0, &addresses);
 468                 for (i = 0; i < c; i++) {
 469                         _cleanup_free_ char *pretty = NULL;
 470
 471                         r = in_addr_to_string(addresses[i].family, &addresses[i].address, &pretty);
 472                         if (r < 0)
 473                                 return log_oom();
 474
 475                         printf("%13s %s\n",
 476                                i > 0 ? "" : "Address:", pretty);
 477                 }
 478
 479                 sd_network_get_dns(&dns);
 480                 if (!strv_isempty(dns))
 481                         dump_list("         DNS: ", dns);
 482
 483                 sd_network_get_dns(&ntp);
 484                 if (!strv_isempty(ntp))
 485                         dump_list("         NTP: ", ntp);
 486
 487                 return 0;
 488         }
 489
 490         pager_open_if_enabled();
 491
 492         if (arg_all) {
 493                 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
 494                 _cleanup_free_ LinkInfo *links = NULL;
 495                 int c, i;
 496
 497                 r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
 498                 if (r < 0)
 499                         return rtnl_log_create_error(r);
 500
 501                 r = sd_rtnl_message_request_dump(req, true);
 502                 if (r < 0)
 503                         return rtnl_log_create_error(r);
 504
 505                 r = sd_rtnl_call(rtnl, req, 0, &reply);
 506                 if (r < 0) {
 507                         log_error("Failed to enumerate links: %s", strerror(-r));
 508                         return r;
 509                 }
 510
 511                 c = decode_and_sort_links(reply, &links);
 512                 if (c < 0)
 513                         return rtnl_log_parse_error(c);
 514
 515                 for (i = 0; i < c; i++) {
 516                         if (i > 0)
 517                                 fputc('\n', stdout);
 518
 519                         link_status_one(rtnl, udev, links[i].name);
 520                 }
 521         }
 522
 523         STRV_FOREACH(name, args + 1) {
 524                 if (name != args+1)
 525                         fputc('\n', stdout);
 526
 527                 link_status_one(rtnl, udev, *name);
 528         }
 529
 530         return 0;
 531 }
 532
 533 static void help(void) {
 534         printf("%s [OPTIONS...]\n\n"
 535                "Query and control the networking subsystem.\n\n"
 536                "  -h --help             Show this help\n"
 537                "     --version          Show package version\n"
 538                "     --no-pager         Do not pipe output into a pager\n"
 539                "     --no-legend        Do not show the headers and footers\n"
 540                "  -a --all              Show status for all links\n\n"
 541                "Commands:\n"
 542                "  list                  List links\n"
 543                "  status LINK           Show link status\n"
 544                , program_invocation_short_name);
 545 }
 546
 547 static int parse_argv(int argc, char *argv[]) {
 548
 549         enum {
 550                 ARG_VERSION = 0x100,
 551                 ARG_NO_PAGER,
 552                 ARG_NO_LEGEND,
 553         };
 554
 555         static const struct option options[] = {
 556                 { "help",      no_argument,       NULL, 'h'           },
 557                 { "version",   no_argument,       NULL, ARG_VERSION   },
 558                 { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
 559                 { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
 560                 { "all",       no_argument,       NULL, 'a'           },
 561                 {}
 562         };
 563
 564         int c;
 565
 566         assert(argc >= 0);
 567         assert(argv);
 568
 569         while ((c = getopt_long(argc, argv, "ha", options, NULL)) >= 0) {
 570
 571                 switch (c) {
 572
 573                 case 'h':
 574                         help();
 575                         return 0;
 576
 577                 case ARG_VERSION:
 578                         puts(PACKAGE_STRING);
 579                         puts(SYSTEMD_FEATURES);
 580                         return 0;
 581
 582                 case ARG_NO_PAGER:
 583                         arg_no_pager = true;
 584                         break;
 585
 586                 case ARG_NO_LEGEND:
 587                         arg_legend = false;
 588                         break;
 589
 590                 case 'a':
 591                         arg_all = true;
 592                         break;
 593
 594                 case '?':
 595                         return -EINVAL;
 596
 597                 default:
 598                         assert_not_reached("Unhandled option");
 599                 }
 600         }
 601
 602         return 1;
 603 }
 604
 605 static int networkctl_main(int argc, char *argv[]) {
 606
 607         static const struct {
 608                 const char* verb;
 609                 const enum {
 610                         MORE,
 611                         LESS,
 612                         EQUAL
 613                 } argc_cmp;
 614                 const int argc;
 615                 int (* const dispatch)(char **args, unsigned n);
 616         } verbs[] = {
 617                 { "list",   LESS, 1, list_links  },
 618                 { "status", MORE, 1, link_status },
 619         };
 620
 621         int left;
 622         unsigned i;
 623
 624         assert(argc >= 0);
 625         assert(argv);
 626
 627         left = argc - optind;
 628
 629         if (left <= 0)
 630                 /* Special rule: no arguments means "list" */
 631                 i = 0;
 632         else {
 633                 if (streq(argv[optind], "help")) {
 634                         help();
 635                         return 0;
 636                 }
 637
 638                 for (i = 0; i < ELEMENTSOF(verbs); i++)
 639                         if (streq(argv[optind], verbs[i].verb))
 640                                 break;
 641
 642                 if (i >= ELEMENTSOF(verbs)) {
 643                         log_error("Unknown operation %s", argv[optind]);
 644                         return -EINVAL;
 645                 }
 646         }
 647
 648         switch (verbs[i].argc_cmp) {
 649
 650         case EQUAL:
 651                 if (left != verbs[i].argc) {
 652                         log_error("Invalid number of arguments.");
 653                         return -EINVAL;
 654                 }
 655
 656                 break;
 657
 658         case MORE:
 659                 if (left < verbs[i].argc) {
 660                         log_error("Too few arguments.");
 661                         return -EINVAL;
 662                 }
 663
 664                 break;
 665
 666         case LESS:
 667                 if (left > verbs[i].argc) {
 668                         log_error("Too many arguments.");
 669                         return -EINVAL;
 670                 }
 671
 672                 break;
 673
 674         default:
 675                 assert_not_reached("Unknown comparison operator.");
 676         }
 677
 678         return verbs[i].dispatch(argv + optind, left);
 679 }
 680
 681 int main(int argc, char* argv[]) {
 682         int r;
 683
 684         log_parse_environment();
 685         log_open();
 686
 687         r = parse_argv(argc, argv);
 688         if (r <= 0)
 689                 goto finish;
 690
 691         r = networkctl_main(argc, argv);
 692
 693 finish:
 694         pager_close();
 695
 696         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 697 }