src/network/networkctl.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <getopt.h>
   4 #include <linux/if_addrlabel.h>
   5 #include <net/if.h>
   6 #include <stdbool.h>
   7
   8 #include "sd-device.h"
   9 #include "sd-hwdb.h"
  10 #include "sd-lldp.h"
  11 #include "sd-netlink.h"
  12 #include "sd-network.h"
  13
  14 #include "alloc-util.h"
  15 #include "arphrd-list.h"
  16 #include "device-util.h"
  17 #include "ether-addr-util.h"
  18 #include "fd-util.h"
  19 #include "hwdb-util.h"
  20 #include "local-addresses.h"
  21 #include "locale-util.h"
  22 #include "macro.h"
  23 #include "main-func.h"
  24 #include "netlink-util.h"
  25 #include "pager.h"
  26 #include "parse-util.h"
  27 #include "pretty-print.h"
  28 #include "socket-util.h"
  29 #include "sparse-endian.h"
  30 #include "stdio-util.h"
  31 #include "string-table.h"
  32 #include "string-util.h"
  33 #include "strv.h"
  34 #include "strxcpyx.h"
  35 #include "terminal-util.h"
  36 #include "util.h"
  37 #include "verbs.h"
  38
  39 static PagerFlags arg_pager_flags = 0;
  40 static bool arg_legend = true;
  41 static bool arg_all = false;
  42
  43 static char *link_get_type_string(unsigned short iftype, sd_device *d) {
  44         const char *t, *devtype;
  45         char *p;
  46
  47         if (d &&
  48             sd_device_get_devtype(d, &devtype) >= 0 &&
  49             !isempty(devtype))
  50                 return strdup(devtype);
  51
  52         t = arphrd_to_name(iftype);
  53         if (!t)
  54                 return NULL;
  55
  56         p = strdup(t);
  57         if (!p)
  58                 return NULL;
  59
  60         ascii_strlower(p);
  61         return p;
  62 }
  63
  64 static void operational_state_to_color(const char *state, const char **on, const char **off) {
  65         assert(on);
  66         assert(off);
  67
  68         if (streq_ptr(state, "routable")) {
  69                 *on = ansi_highlight_green();
  70                 *off = ansi_normal();
  71         } else if (streq_ptr(state, "degraded")) {
  72                 *on = ansi_highlight_yellow();
  73                 *off = ansi_normal();
  74         } else
  75                 *on = *off = "";
  76 }
  77
  78 static void setup_state_to_color(const char *state, const char **on, const char **off) {
  79         assert(on);
  80         assert(off);
  81
  82         if (streq_ptr(state, "configured")) {
  83                 *on = ansi_highlight_green();
  84                 *off = ansi_normal();
  85         } else if (streq_ptr(state, "configuring")) {
  86                 *on = ansi_highlight_yellow();
  87                 *off = ansi_normal();
  88         } else if (STRPTR_IN_SET(state, "failed", "linger")) {
  89                 *on = ansi_highlight_red();
  90                 *off = ansi_normal();
  91         } else
  92                 *on = *off = "";
  93 }
  94
  95 typedef struct LinkInfo {
  96         char name[IFNAMSIZ+1];
  97         int ifindex;
  98         unsigned short iftype;
  99         struct ether_addr mac_address;
 100         uint32_t mtu;
 101
 102         bool has_mac_address:1;
 103         bool has_mtu:1;
 104 } LinkInfo;
 105
 106 static int link_info_compare(const LinkInfo *a, const LinkInfo *b) {
 107         return CMP(a->ifindex, b->ifindex);
 108 }
 109
 110 static int decode_link(sd_netlink_message *m, LinkInfo *info) {
 111         const char *name;
 112         uint16_t type;
 113         int r;
 114
 115         assert(m);
 116         assert(info);
 117
 118         r = sd_netlink_message_get_type(m, &type);
 119         if (r < 0)
 120                 return r;
 121
 122         if (type != RTM_NEWLINK)
 123                 return 0;
 124
 125         r = sd_rtnl_message_link_get_ifindex(m, &info->ifindex);
 126         if (r < 0)
 127                 return r;
 128
 129         r = sd_netlink_message_read_string(m, IFLA_IFNAME, &name);
 130         if (r < 0)
 131                 return r;
 132
 133         r = sd_rtnl_message_link_get_type(m, &info->iftype);
 134         if (r < 0)
 135                 return r;
 136
 137         strscpy(info->name, sizeof info->name, name);
 138
 139         info->has_mac_address =
 140                 sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &info->mac_address) >= 0 &&
 141                 memcmp(&info->mac_address, &ETHER_ADDR_NULL, sizeof(struct ether_addr)) != 0;
 142
 143         info->has_mtu =
 144                 sd_netlink_message_read_u32(m, IFLA_MTU, &info->mtu) &&
 145                 info->mtu > 0;
 146
 147         return 1;
 148 }
 149
 150 static int acquire_link_info_strv(sd_netlink *rtnl, char **l, LinkInfo **ret) {
 151         _cleanup_free_ LinkInfo *links = NULL;
 152         char **i;
 153         size_t c = 0;
 154         int r;
 155
 156         assert(rtnl);
 157         assert(ret);
 158
 159         links = new(LinkInfo, strv_length(l));
 160         if (!links)
 161                 return log_oom();
 162
 163         STRV_FOREACH(i, l) {
 164                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 165                 int ifindex;
 166
 167                 if (parse_ifindex(*i, &ifindex) >= 0)
 168                         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, ifindex);
 169                 else {
 170                         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
 171                         if (r < 0)
 172                                 return rtnl_log_create_error(r);
 173
 174                         r = sd_netlink_message_append_string(req, IFLA_IFNAME, *i);
 175                 }
 176                 if (r < 0)
 177                         return rtnl_log_create_error(r);
 178
 179                 r = sd_netlink_call(rtnl, req, 0, &reply);
 180                 if (r < 0)
 181                         return log_error_errno(r, "Failed to request link: %m");
 182
 183                 r = decode_link(reply, links + c);
 184                 if (r < 0)
 185                         return r;
 186                 if (r > 0)
 187                         c++;
 188         }
 189
 190         typesafe_qsort(links, c, link_info_compare);
 191
 192         *ret = TAKE_PTR(links);
 193
 194         return (int) c;
 195 }
 196
 197 static int acquire_link_info_all(sd_netlink *rtnl, LinkInfo **ret) {
 198         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 199         _cleanup_free_ LinkInfo *links = NULL;
 200         size_t allocated = 0, c = 0;
 201         sd_netlink_message *i;
 202         int r;
 203
 204         assert(rtnl);
 205         assert(ret);
 206
 207         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
 208         if (r < 0)
 209                 return rtnl_log_create_error(r);
 210
 211         r = sd_netlink_message_request_dump(req, true);
 212         if (r < 0)
 213                 return rtnl_log_create_error(r);
 214
 215         r = sd_netlink_call(rtnl, req, 0, &reply);
 216         if (r < 0)
 217                 return log_error_errno(r, "Failed to enumerate links: %m");
 218
 219         for (i = reply; i; i = sd_netlink_message_next(i)) {
 220                 if (!GREEDY_REALLOC(links, allocated, c+1))
 221                         return -ENOMEM;
 222
 223                 r = decode_link(i, links + c);
 224                 if (r < 0)
 225                         return r;
 226                 if (r > 0)
 227                         c++;
 228         }
 229
 230         typesafe_qsort(links, c, link_info_compare);
 231
 232         *ret = TAKE_PTR(links);
 233
 234         return (int) c;
 235 }
 236
 237 static int list_links(int argc, char *argv[], void *userdata) {
 238         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 239         _cleanup_free_ LinkInfo *links = NULL;
 240         int c, i, r;
 241
 242         r = sd_netlink_open(&rtnl);
 243         if (r < 0)
 244                 return log_error_errno(r, "Failed to connect to netlink: %m");
 245
 246         if (argc > 1)
 247                 c = acquire_link_info_strv(rtnl, argv + 1, &links);
 248         else
 249                 c = acquire_link_info_all(rtnl, &links);
 250         if (c < 0)
 251                 return c;
 252
 253         (void) pager_open(arg_pager_flags);
 254
 255         if (arg_legend)
 256                 printf("%3s %-16s %-18s %-11s %-10s\n",
 257                        "IDX",
 258                        "LINK",
 259                        "TYPE",
 260                        "OPERATIONAL",
 261                        "SETUP");
 262
 263         for (i = 0; i < c; i++) {
 264                 _cleanup_free_ char *setup_state = NULL, *operational_state = NULL;
 265                 _cleanup_(sd_device_unrefp) sd_device *d = NULL;
 266                 const char *on_color_operational, *off_color_operational,
 267                            *on_color_setup, *off_color_setup;
 268                 char devid[2 + DECIMAL_STR_MAX(int)];
 269                 _cleanup_free_ char *t = NULL;
 270
 271                 (void) sd_network_link_get_operational_state(links[i].ifindex, &operational_state);
 272                 operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 273
 274                 r = sd_network_link_get_setup_state(links[i].ifindex, &setup_state);
 275                 if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */
 276                         setup_state = strdup("unmanaged");
 277                 setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
 278
 279                 xsprintf(devid, "n%i", links[i].ifindex);
 280                 (void) sd_device_new_from_device_id(&d, devid);
 281
 282                 t = link_get_type_string(links[i].iftype, d);
 283
 284                 printf("%3i %-16s %-18s %s%-11s%s %s%-10s%s\n",
 285                        links[i].ifindex, links[i].name, strna(t),
 286                        on_color_operational, strna(operational_state), off_color_operational,
 287                        on_color_setup, strna(setup_state), off_color_setup);
 288         }
 289
 290         if (arg_legend)
 291                 printf("\n%i links listed.\n", c);
 292
 293         return 0;
 294 }
 295
 296 /* IEEE Organizationally Unique Identifier vendor string */
 297 static int ieee_oui(sd_hwdb *hwdb, const struct ether_addr *mac, char **ret) {
 298         const char *description;
 299         char modalias[STRLEN("OUI:XXYYXXYYXXYY") + 1], *desc;
 300         int r;
 301
 302         assert(ret);
 303
 304         if (!hwdb)
 305                 return -EINVAL;
 306
 307         if (!mac)
 308                 return -EINVAL;
 309
 310         /* skip commonly misused 00:00:00 (Xerox) prefix */
 311         if (memcmp(mac, "\0\0\0", 3) == 0)
 312                 return -EINVAL;
 313
 314         xsprintf(modalias, "OUI:" ETHER_ADDR_FORMAT_STR,
 315                  ETHER_ADDR_FORMAT_VAL(*mac));
 316
 317         r = sd_hwdb_get(hwdb, modalias, "ID_OUI_FROM_DATABASE", &description);
 318         if (r < 0)
 319                 return r;
 320
 321         desc = strdup(description);
 322         if (!desc)
 323                 return -ENOMEM;
 324
 325         *ret = desc;
 326
 327         return 0;
 328 }
 329
 330 static int get_gateway_description(
 331                 sd_netlink *rtnl,
 332                 sd_hwdb *hwdb,
 333                 int ifindex,
 334                 int family,
 335                 union in_addr_union *gateway,
 336                 char **gateway_description) {
 337         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 338         sd_netlink_message *m;
 339         int r;
 340
 341         assert(rtnl);
 342         assert(ifindex >= 0);
 343         assert(IN_SET(family, AF_INET, AF_INET6));
 344         assert(gateway);
 345         assert(gateway_description);
 346
 347         r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_GETNEIGH, ifindex, family);
 348         if (r < 0)
 349                 return r;
 350
 351         r = sd_netlink_message_request_dump(req, true);
 352         if (r < 0)
 353                 return r;
 354
 355         r = sd_netlink_call(rtnl, req, 0, &reply);
 356         if (r < 0)
 357                 return r;
 358
 359         for (m = reply; m; m = sd_netlink_message_next(m)) {
 360                 union in_addr_union gw = {};
 361                 struct ether_addr mac = {};
 362                 uint16_t type;
 363                 int ifi, fam;
 364
 365                 r = sd_netlink_message_get_errno(m);
 366                 if (r < 0) {
 367                         log_error_errno(r, "got error: %m");
 368                         continue;
 369                 }
 370
 371                 r = sd_netlink_message_get_type(m, &type);
 372                 if (r < 0) {
 373                         log_error_errno(r, "could not get type: %m");
 374                         continue;
 375                 }
 376
 377                 if (type != RTM_NEWNEIGH) {
 378                         log_error("type is not RTM_NEWNEIGH");
 379                         continue;
 380                 }
 381
 382                 r = sd_rtnl_message_neigh_get_family(m, &fam);
 383                 if (r < 0) {
 384                         log_error_errno(r, "could not get family: %m");
 385                         continue;
 386                 }
 387
 388                 if (fam != family) {
 389                         log_error("family is not correct");
 390                         continue;
 391                 }
 392
 393                 r = sd_rtnl_message_neigh_get_ifindex(m, &ifi);
 394                 if (r < 0) {
 395                         log_error_errno(r, "could not get ifindex: %m");
 396                         continue;
 397                 }
 398
 399                 if (ifindex > 0 && ifi != ifindex)
 400                         continue;
 401
 402                 switch (fam) {
 403                 case AF_INET:
 404                         r = sd_netlink_message_read_in_addr(m, NDA_DST, &gw.in);
 405                         if (r < 0)
 406                                 continue;
 407
 408                         break;
 409                 case AF_INET6:
 410                         r = sd_netlink_message_read_in6_addr(m, NDA_DST, &gw.in6);
 411                         if (r < 0)
 412                                 continue;
 413
 414                         break;
 415                 default:
 416                         continue;
 417                 }
 418
 419                 if (!in_addr_equal(fam, &gw, gateway))
 420                         continue;
 421
 422                 r = sd_netlink_message_read_ether_addr(m, NDA_LLADDR, &mac);
 423                 if (r < 0)
 424                         continue;
 425
 426                 r = ieee_oui(hwdb, &mac, gateway_description);
 427                 if (r < 0)
 428                         continue;
 429
 430                 return 0;
 431         }
 432
 433         return -ENODATA;
 434 }
 435
 436 static int dump_gateways(
 437                 sd_netlink *rtnl,
 438                 sd_hwdb *hwdb,
 439                 const char *prefix,
 440                 int ifindex) {
 441         _cleanup_free_ struct local_address *local = NULL;
 442         int r, n, i;
 443
 444         assert(rtnl);
 445         assert(prefix);
 446
 447         n = local_gateways(rtnl, ifindex, AF_UNSPEC, &local);
 448         if (n < 0)
 449                 return n;
 450
 451         for (i = 0; i < n; i++) {
 452                 _cleanup_free_ char *gateway = NULL, *description = NULL;
 453
 454                 r = in_addr_to_string(local[i].family, &local[i].address, &gateway);
 455                 if (r < 0)
 456                         return r;
 457
 458                 r = get_gateway_description(rtnl, hwdb, local[i].ifindex, local[i].family, &local[i].address, &description);
 459                 if (r < 0)
 460                         log_debug_errno(r, "Could not get description of gateway: %m");
 461
 462                 printf("%*s%s",
 463                        (int) strlen(prefix),
 464                        i == 0 ? prefix : "",
 465                        gateway);
 466
 467                 if (description)
 468                         printf(" (%s)", description);
 469
 470                 /* Show interface name for the entry if we show
 471                  * entries for all interfaces */
 472                 if (ifindex <= 0) {
 473                         char name[IF_NAMESIZE+1];
 474
 475                         if (if_indextoname(local[i].ifindex, name)) {
 476                                 fputs(" on ", stdout);
 477                                 fputs(name, stdout);
 478                         } else
 479                                 printf(" on %%%i", local[i].ifindex);
 480                 }
 481
 482                 fputc('\n', stdout);
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int dump_addresses(
 489                 sd_netlink *rtnl,
 490                 const char *prefix,
 491                 int ifindex) {
 492
 493         _cleanup_free_ struct local_address *local = NULL;
 494         int r, n, i;
 495
 496         assert(rtnl);
 497         assert(prefix);
 498
 499         n = local_addresses(rtnl, ifindex, AF_UNSPEC, &local);
 500         if (n < 0)
 501                 return n;
 502
 503         for (i = 0; i < n; i++) {
 504                 _cleanup_free_ char *pretty = NULL;
 505
 506                 r = in_addr_to_string(local[i].family, &local[i].address, &pretty);
 507                 if (r < 0)
 508                         return r;
 509
 510                 printf("%*s%s",
 511                        (int) strlen(prefix),
 512                        i == 0 ? prefix : "",
 513                        pretty);
 514
 515                 if (ifindex <= 0) {
 516                         char name[IF_NAMESIZE+1];
 517
 518                         if (if_indextoname(local[i].ifindex, name)) {
 519                                 fputs(" on ", stdout);
 520                                 fputs(name, stdout);
 521                         } else
 522                                 printf(" on %%%i", local[i].ifindex);
 523                 }
 524
 525                 fputc('\n', stdout);
 526         }
 527
 528         return 0;
 529 }
 530
 531 static int dump_address_labels(sd_netlink *rtnl) {
 532         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 533         sd_netlink_message *m;
 534         int r;
 535
 536         assert(rtnl);
 537
 538         r = sd_rtnl_message_new_addrlabel(rtnl, &req, RTM_GETADDRLABEL, 0, AF_INET6);
 539         if (r < 0)
 540                 return log_error_errno(r, "Could not allocate RTM_GETADDRLABEL message: %m");
 541
 542         r = sd_netlink_message_request_dump(req, true);
 543         if (r < 0)
 544                 return r;
 545
 546         r = sd_netlink_call(rtnl, req, 0, &reply);
 547         if (r < 0)
 548                 return r;
 549
 550         printf("%10s/%s %30s\n", "Prefix", "Prefixlen", "Label");
 551
 552         for (m = reply; m; m = sd_netlink_message_next(m)) {
 553                 _cleanup_free_ char *pretty = NULL;
 554                 union in_addr_union prefix = {};
 555                 uint8_t prefixlen;
 556                 uint32_t label;
 557
 558                 r = sd_netlink_message_get_errno(m);
 559                 if (r < 0) {
 560                         log_error_errno(r, "got error: %m");
 561                         continue;
 562                 }
 563
 564                 r = sd_netlink_message_read_u32(m, IFAL_LABEL, &label);
 565                 if (r < 0 && r != -ENODATA) {
 566                         log_error_errno(r, "Could not read IFAL_LABEL, ignoring: %m");
 567                         continue;
 568                 }
 569
 570                 r = sd_netlink_message_read_in6_addr(m, IFAL_ADDRESS, &prefix.in6);
 571                 if (r < 0)
 572                         continue;
 573
 574                 r = in_addr_to_string(AF_INET6, &prefix, &pretty);
 575                 if (r < 0)
 576                         continue;
 577
 578                 r = sd_rtnl_message_addrlabel_get_prefixlen(m, &prefixlen);
 579                 if (r < 0)
 580                         continue;
 581
 582                 printf("%10s/%-5u %30u\n", pretty, prefixlen, label);
 583         }
 584
 585         return 0;
 586 }
 587
 588 static int list_address_labels(int argc, char *argv[], void *userdata) {
 589         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 590         int r;
 591
 592         r = sd_netlink_open(&rtnl);
 593         if (r < 0)
 594                 return log_error_errno(r, "Failed to connect to netlink: %m");
 595
 596         dump_address_labels(rtnl);
 597
 598         return 0;
 599 }
 600
 601 static int open_lldp_neighbors(int ifindex, FILE **ret) {
 602         _cleanup_free_ char *p = NULL;
 603         FILE *f;
 604
 605         if (asprintf(&p, "/run/systemd/netif/lldp/%i", ifindex) < 0)
 606                 return -ENOMEM;
 607
 608         f = fopen(p, "re");
 609         if (!f)
 610                 return -errno;
 611
 612         *ret = f;
 613         return 0;
 614 }
 615
 616 static int next_lldp_neighbor(FILE *f, sd_lldp_neighbor **ret) {
 617         _cleanup_free_ void *raw = NULL;
 618         size_t l;
 619         le64_t u;
 620         int r;
 621
 622         assert(f);
 623         assert(ret);
 624
 625         l = fread(&u, 1, sizeof(u), f);
 626         if (l == 0 && feof(f))
 627                 return 0;
 628         if (l != sizeof(u))
 629                 return -EBADMSG;
 630
 631         /* each LLDP packet is at most MTU size, but let's allow up to 4KiB just in case */
 632         if (le64toh(u) >= 4096)
 633                 return -EBADMSG;
 634
 635         raw = new(uint8_t, le64toh(u));
 636         if (!raw)
 637                 return -ENOMEM;
 638
 639         if (fread(raw, 1, le64toh(u), f) != le64toh(u))
 640                 return -EBADMSG;
 641
 642         r = sd_lldp_neighbor_from_raw(ret, raw, le64toh(u));
 643         if (r < 0)
 644                 return r;
 645
 646         return 1;
 647 }
 648
 649 static int dump_lldp_neighbors(const char *prefix, int ifindex) {
 650         _cleanup_fclose_ FILE *f = NULL;
 651         int r, c = 0;
 652
 653         assert(prefix);
 654         assert(ifindex > 0);
 655
 656         r = open_lldp_neighbors(ifindex, &f);
 657         if (r < 0)
 658                 return r;
 659
 660         for (;;) {
 661                 const char *system_name = NULL, *port_id = NULL, *port_description = NULL;
 662                 _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
 663
 664                 r = next_lldp_neighbor(f, &n);
 665                 if (r < 0)
 666                         return r;
 667                 if (r == 0)
 668                         break;
 669
 670                 printf("%*s",
 671                        (int) strlen(prefix),
 672                        c == 0 ? prefix : "");
 673
 674                 (void) sd_lldp_neighbor_get_system_name(n, &system_name);
 675                 (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id);
 676                 (void) sd_lldp_neighbor_get_port_description(n, &port_description);
 677
 678                 printf("%s on port %s", strna(system_name), strna(port_id));
 679
 680                 if (!isempty(port_description))
 681                         printf(" (%s)", port_description);
 682
 683                 putchar('\n');
 684
 685                 c++;
 686         }
 687
 688         return c;
 689 }
 690
 691 static void dump_ifindexes(const char *prefix, const int *ifindexes) {
 692         unsigned c;
 693
 694         assert(prefix);
 695
 696         if (!ifindexes || ifindexes[0] <= 0)
 697                 return;
 698
 699         for (c = 0; ifindexes[c] > 0; c++) {
 700                 char name[IF_NAMESIZE+1];
 701
 702                 printf("%*s",
 703                        (int) strlen(prefix),
 704                        c == 0 ? prefix : "");
 705
 706                 if (if_indextoname(ifindexes[c], name))
 707                         fputs(name, stdout);
 708                 else
 709                         printf("%i", ifindexes[c]);
 710
 711                 fputc('\n', stdout);
 712         }
 713 }
 714
 715 static void dump_list(const char *prefix, char **l) {
 716         char **i;
 717
 718         if (strv_isempty(l))
 719                 return;
 720
 721         STRV_FOREACH(i, l) {
 722                 printf("%*s%s\n",
 723                        (int) strlen(prefix),
 724                        i == l ? prefix : "",
 725                        *i);
 726         }
 727 }
 728
 729 static int link_status_one(
 730                 sd_netlink *rtnl,
 731                 sd_hwdb *hwdb,
 732                 const LinkInfo *info) {
 733
 734         _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL;
 735         _cleanup_free_ char *setup_state = NULL, *operational_state = NULL, *tz = NULL;
 736         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
 737         char devid[2 + DECIMAL_STR_MAX(int)];
 738         _cleanup_free_ char *t = NULL, *network = NULL;
 739         const char *driver = NULL, *path = NULL, *vendor = NULL, *model = NULL, *link = NULL;
 740         const char *on_color_operational, *off_color_operational,
 741                    *on_color_setup, *off_color_setup;
 742         _cleanup_free_ int *carrier_bound_to = NULL, *carrier_bound_by = NULL;
 743         int r;
 744
 745         assert(rtnl);
 746         assert(info);
 747
 748         (void) sd_network_link_get_operational_state(info->ifindex, &operational_state);
 749         operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 750
 751         r = sd_network_link_get_setup_state(info->ifindex, &setup_state);
 752         if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */
 753                 setup_state = strdup("unmanaged");
 754         setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
 755
 756         (void) sd_network_link_get_dns(info->ifindex, &dns);
 757         (void) sd_network_link_get_search_domains(info->ifindex, &search_domains);
 758         (void) sd_network_link_get_route_domains(info->ifindex, &route_domains);
 759         (void) sd_network_link_get_ntp(info->ifindex, &ntp);
 760
 761         xsprintf(devid, "n%i", info->ifindex);
 762
 763         (void) sd_device_new_from_device_id(&d, devid);
 764
 765         if (d) {
 766                 (void) sd_device_get_property_value(d, "ID_NET_LINK_FILE", &link);
 767                 (void) sd_device_get_property_value(d, "ID_NET_DRIVER", &driver);
 768                 (void) sd_device_get_property_value(d, "ID_PATH", &path);
 769
 770                 if (sd_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE", &vendor) < 0)
 771                         (void) sd_device_get_property_value(d, "ID_VENDOR", &vendor);
 772
 773                 if (sd_device_get_property_value(d, "ID_MODEL_FROM_DATABASE", &model) < 0)
 774                         (void) sd_device_get_property_value(d, "ID_MODEL", &model);
 775         }
 776
 777         t = link_get_type_string(info->iftype, d);
 778
 779         (void) sd_network_link_get_network_file(info->ifindex, &network);
 780
 781         (void) sd_network_link_get_carrier_bound_to(info->ifindex, &carrier_bound_to);
 782         (void) sd_network_link_get_carrier_bound_by(info->ifindex, &carrier_bound_by);
 783
 784         printf("%s%s%s %i: %s\n", on_color_operational, special_glyph(SPECIAL_GLYPH_BLACK_CIRCLE), off_color_operational, info->ifindex, info->name);
 785
 786         printf("       Link File: %s\n"
 787                "    Network File: %s\n"
 788                "            Type: %s\n"
 789                "           State: %s%s%s (%s%s%s)\n",
 790                strna(link),
 791                strna(network),
 792                strna(t),
 793                on_color_operational, strna(operational_state), off_color_operational,
 794                on_color_setup, strna(setup_state), off_color_setup);
 795
 796         if (path)
 797                 printf("            Path: %s\n", path);
 798         if (driver)
 799                 printf("          Driver: %s\n", driver);
 800         if (vendor)
 801                 printf("          Vendor: %s\n", vendor);
 802         if (model)
 803                 printf("           Model: %s\n", model);
 804
 805         if (info->has_mac_address) {
 806                 _cleanup_free_ char *description = NULL;
 807                 char ea[ETHER_ADDR_TO_STRING_MAX];
 808
 809                 (void) ieee_oui(hwdb, &info->mac_address, &description);
 810
 811                 if (description)
 812                         printf("      HW Address: %s (%s)\n", ether_addr_to_string(&info->mac_address, ea), description);
 813                 else
 814                         printf("      HW Address: %s\n", ether_addr_to_string(&info->mac_address, ea));
 815         }
 816
 817         if (info->has_mtu)
 818                 printf("             MTU: %" PRIu32 "\n", info->mtu);
 819
 820         (void) dump_addresses(rtnl, "         Address: ", info->ifindex);
 821         (void) dump_gateways(rtnl, hwdb, "         Gateway: ", info->ifindex);
 822
 823         dump_list("             DNS: ", dns);
 824         dump_list("  Search Domains: ", search_domains);
 825         dump_list("   Route Domains: ", route_domains);
 826
 827         dump_list("             NTP: ", ntp);
 828
 829         dump_ifindexes("Carrier Bound To: ", carrier_bound_to);
 830         dump_ifindexes("Carrier Bound By: ", carrier_bound_by);
 831
 832         (void) sd_network_link_get_timezone(info->ifindex, &tz);
 833         if (tz)
 834                 printf("       Time Zone: %s\n", tz);
 835
 836         (void) dump_lldp_neighbors("    Connected To: ", info->ifindex);
 837
 838         return 0;
 839 }
 840
 841 static int system_status(sd_netlink *rtnl, sd_hwdb *hwdb) {
 842         _cleanup_free_ char *operational_state = NULL;
 843         _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL;
 844         const char *on_color_operational, *off_color_operational;
 845
 846         assert(rtnl);
 847
 848         (void) sd_network_get_operational_state(&operational_state);
 849         operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 850
 851         printf("%s%s%s        State: %s%s%s\n",
 852                on_color_operational, special_glyph(SPECIAL_GLYPH_BLACK_CIRCLE), off_color_operational,
 853                on_color_operational, strna(operational_state), off_color_operational);
 854
 855         (void) dump_addresses(rtnl, "       Address: ", 0);
 856         (void) dump_gateways(rtnl, hwdb, "       Gateway: ", 0);
 857
 858         (void) sd_network_get_dns(&dns);
 859         dump_list("           DNS: ", dns);
 860
 861         (void) sd_network_get_search_domains(&search_domains);
 862         dump_list("Search Domains: ", search_domains);
 863
 864         (void) sd_network_get_route_domains(&route_domains);
 865         dump_list(" Route Domains: ", route_domains);
 866
 867         (void) sd_network_get_ntp(&ntp);
 868         dump_list("           NTP: ", ntp);
 869
 870         return 0;
 871 }
 872
 873 static int link_status(int argc, char *argv[], void *userdata) {
 874         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 875         _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
 876         _cleanup_free_ LinkInfo *links = NULL;
 877         int r, c, i;
 878
 879         (void) pager_open(arg_pager_flags);
 880
 881         r = sd_netlink_open(&rtnl);
 882         if (r < 0)
 883                 return log_error_errno(r, "Failed to connect to netlink: %m");
 884
 885         r = sd_hwdb_new(&hwdb);
 886         if (r < 0)
 887                 log_debug_errno(r, "Failed to open hardware database: %m");
 888
 889         if (arg_all)
 890                 c = acquire_link_info_all(rtnl, &links);
 891         else if (argc <= 1)
 892                 return system_status(rtnl, hwdb);
 893         else
 894                 c = acquire_link_info_strv(rtnl, argv + 1, &links);
 895         if (c < 0)
 896                 return c;
 897
 898         for (i = 0; i < c; i++) {
 899                 if (i > 0)
 900                         fputc('\n', stdout);
 901
 902                 link_status_one(rtnl, hwdb, links + i);
 903         }
 904
 905         return 0;
 906 }
 907
 908 static char *lldp_capabilities_to_string(uint16_t x) {
 909         static const char characters[] = {
 910                 'o', 'p', 'b', 'w', 'r', 't', 'd', 'a', 'c', 's', 'm',
 911         };
 912         char *ret;
 913         unsigned i;
 914
 915         ret = new(char, ELEMENTSOF(characters) + 1);
 916         if (!ret)
 917                 return NULL;
 918
 919         for (i = 0; i < ELEMENTSOF(characters); i++)
 920                 ret[i] = (x & (1U << i)) ? characters[i] : '.';
 921
 922         ret[i] = 0;
 923         return ret;
 924 }
 925
 926 static void lldp_capabilities_legend(uint16_t x) {
 927         unsigned w, i, cols = columns();
 928         static const char* const table[] = {
 929                 "o - Other",
 930                 "p - Repeater",
 931                 "b - Bridge",
 932                 "w - WLAN Access Point",
 933                 "r - Router",
 934                 "t - Telephone",
 935                 "d - DOCSIS cable device",
 936                 "a - Station",
 937                 "c - Customer VLAN",
 938                 "s - Service VLAN",
 939                 "m - Two-port MAC Relay (TPMR)",
 940         };
 941
 942         if (x == 0)
 943                 return;
 944
 945         printf("\nCapability Flags:\n");
 946         for (w = 0, i = 0; i < ELEMENTSOF(table); i++)
 947                 if (x & (1U << i) || arg_all) {
 948                         bool newline;
 949
 950                         newline = w + strlen(table[i]) + (w == 0 ? 0 : 2) > cols;
 951                         if (newline)
 952                                 w = 0;
 953                         w += printf("%s%s%s", newline ? "\n" : "", w == 0 ? "" : "; ", table[i]);
 954                 }
 955         puts("");
 956 }
 957
 958 static int link_lldp_status(int argc, char *argv[], void *userdata) {
 959         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 960         _cleanup_free_ LinkInfo *links = NULL;
 961         int i, r, c, m = 0;
 962         uint16_t all = 0;
 963
 964         r = sd_netlink_open(&rtnl);
 965         if (r < 0)
 966                 return log_error_errno(r, "Failed to connect to netlink: %m");
 967
 968         if (argc > 1)
 969                 c = acquire_link_info_strv(rtnl, argv + 1, &links);
 970         else
 971                 c = acquire_link_info_all(rtnl, &links);
 972         if (c < 0)
 973                 return c;
 974
 975         (void) pager_open(arg_pager_flags);
 976
 977         if (arg_legend)
 978                 printf("%-16s %-17s %-16s %-11s %-17s %-16s\n",
 979                        "LINK",
 980                        "CHASSIS ID",
 981                        "SYSTEM NAME",
 982                        "CAPS",
 983                        "PORT ID",
 984                        "PORT DESCRIPTION");
 985
 986         for (i = 0; i < c; i++) {
 987                 _cleanup_fclose_ FILE *f = NULL;
 988
 989                 r = open_lldp_neighbors(links[i].ifindex, &f);
 990                 if (r == -ENOENT)
 991                         continue;
 992                 if (r < 0) {
 993                         log_warning_errno(r, "Failed to open LLDP data for %i, ignoring: %m", links[i].ifindex);
 994                         continue;
 995                 }
 996
 997                 for (;;) {
 998                         _cleanup_free_ char *cid = NULL, *pid = NULL, *sname = NULL, *pdesc = NULL;
 999                         const char *chassis_id = NULL, *port_id = NULL, *system_name = NULL, *port_description = NULL, *capabilities = NULL;
1000                         _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
1001                         uint16_t cc;
1002
1003                         r = next_lldp_neighbor(f, &n);
1004                         if (r < 0) {
1005                                 log_warning_errno(r, "Failed to read neighbor data: %m");
1006                                 break;
1007                         }
1008                         if (r == 0)
1009                                 break;
1010
1011                         (void) sd_lldp_neighbor_get_chassis_id_as_string(n, &chassis_id);
1012                         (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id);
1013                         (void) sd_lldp_neighbor_get_system_name(n, &system_name);
1014                         (void) sd_lldp_neighbor_get_port_description(n, &port_description);
1015
1016                         if (chassis_id) {
1017                                 cid = ellipsize(chassis_id, 17, 100);
1018                                 if (cid)
1019                                         chassis_id = cid;
1020                         }
1021
1022                         if (port_id) {
1023                                 pid = ellipsize(port_id, 17, 100);
1024                                 if (pid)
1025                                         port_id = pid;
1026                         }
1027
1028                         if (system_name) {
1029                                 sname = ellipsize(system_name, 16, 100);
1030                                 if (sname)
1031                                         system_name = sname;
1032                         }
1033
1034                         if (port_description) {
1035                                 pdesc = ellipsize(port_description, 16, 100);
1036                                 if (pdesc)
1037                                         port_description = pdesc;
1038                         }
1039
1040                         if (sd_lldp_neighbor_get_enabled_capabilities(n, &cc) >= 0) {
1041                                 capabilities = lldp_capabilities_to_string(cc);
1042                                 all |= cc;
1043                         }
1044
1045                         printf("%-16s %-17s %-16s %-11s %-17s %-16s\n",
1046                                links[i].name,
1047                                strna(chassis_id),
1048                                strna(system_name),
1049                                strna(capabilities),
1050                                strna(port_id),
1051                                strna(port_description));
1052
1053                         m++;
1054                 }
1055         }
1056
1057         if (arg_legend) {
1058                 lldp_capabilities_legend(all);
1059                 printf("\n%i neighbors listed.\n", m);
1060         }
1061
1062         return 0;
1063 }
1064
1065 static int help(void) {
1066         _cleanup_free_ char *link = NULL;
1067         int r;
1068
1069         r = terminal_urlify_man("networkctl", "1", &link);
1070         if (r < 0)
1071                 return log_oom();
1072
1073         printf("%s [OPTIONS...]\n\n"
1074                "Query and control the networking subsystem.\n\n"
1075                "  -h --help             Show this help\n"
1076                "     --version          Show package version\n"
1077                "     --no-pager         Do not pipe output into a pager\n"
1078                "     --no-legend        Do not show the headers and footers\n"
1079                "  -a --all              Show status for all links\n\n"
1080                "Commands:\n"
1081                "  list [LINK...]        List links\n"
1082                "  status [LINK...]      Show link status\n"
1083                "  lldp [LINK...]        Show LLDP neighbors\n"
1084                "  label                 Show current address label entries in the kernel\n"
1085                "\nSee the %s for details.\n"
1086                , program_invocation_short_name
1087                , link
1088         );
1089
1090         return 0;
1091 }
1092
1093 static int parse_argv(int argc, char *argv[]) {
1094
1095         enum {
1096                 ARG_VERSION = 0x100,
1097                 ARG_NO_PAGER,
1098                 ARG_NO_LEGEND,
1099         };
1100
1101         static const struct option options[] = {
1102                 { "help",      no_argument,       NULL, 'h'           },
1103                 { "version",   no_argument,       NULL, ARG_VERSION   },
1104                 { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
1105                 { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
1106                 { "all",       no_argument,       NULL, 'a'           },
1107                 {}
1108         };
1109
1110         int c;
1111
1112         assert(argc >= 0);
1113         assert(argv);
1114
1115         while ((c = getopt_long(argc, argv, "ha", options, NULL)) >= 0) {
1116
1117                 switch (c) {
1118
1119                 case 'h':
1120                         return help();
1121
1122                 case ARG_VERSION:
1123                         return version();
1124
1125                 case ARG_NO_PAGER:
1126                         arg_pager_flags |= PAGER_DISABLE;
1127                         break;
1128
1129                 case ARG_NO_LEGEND:
1130                         arg_legend = false;
1131                         break;
1132
1133                 case 'a':
1134                         arg_all = true;
1135                         break;
1136
1137                 case '?':
1138                         return -EINVAL;
1139
1140                 default:
1141                         assert_not_reached("Unhandled option");
1142                 }
1143         }
1144
1145         return 1;
1146 }
1147
1148 static int networkctl_main(int argc, char *argv[]) {
1149         static const Verb verbs[] = {
1150                 { "list",   VERB_ANY, VERB_ANY, VERB_DEFAULT, list_links          },
1151                 { "status", VERB_ANY, VERB_ANY, 0,            link_status         },
1152                 { "lldp",   VERB_ANY, VERB_ANY, 0,            link_lldp_status    },
1153                 { "label",  VERB_ANY, VERB_ANY, 0,            list_address_labels },
1154                 {}
1155         };
1156
1157         return dispatch_verb(argc, argv, verbs, NULL);
1158 }
1159
1160 static void warn_networkd_missing(void) {
1161
1162         if (access("/run/systemd/netif/state", F_OK) >= 0)
1163                 return;
1164
1165         fprintf(stderr, "WARNING: systemd-networkd is not running, output will be incomplete.\n\n");
1166 }
1167
1168 static int run(int argc, char* argv[]) {
1169         int r;
1170
1171         log_parse_environment();
1172         log_open();
1173
1174         r = parse_argv(argc, argv);
1175         if (r <= 0)
1176                 return r;
1177
1178         warn_networkd_missing();
1179
1180         return networkctl_main(argc, argv);
1181 }
1182
1183 DEFINE_MAIN_FUNCTION(run);