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 "netlink-util.h"
  24 #include "pager.h"
  25 #include "parse-util.h"
  26 #include "socket-util.h"
  27 #include "sparse-endian.h"
  28 #include "stdio-util.h"
  29 #include "string-table.h"
  30 #include "string-util.h"
  31 #include "strv.h"
  32 #include "strxcpyx.h"
  33 #include "terminal-util.h"
  34 #include "util.h"
  35 #include "verbs.h"
  36
  37 static bool arg_no_pager = false;
  38 static bool arg_legend = true;
  39 static bool arg_all = false;
  40
  41 static char *link_get_type_string(unsigned short iftype, sd_device *d) {
  42         const char *t;
  43         char *p;
  44
  45         if (d) {
  46                 const char *devtype = NULL;
  47
  48                 (void) sd_device_get_devtype(d, &devtype);
  49                 if (!isempty(devtype))
  50                         return strdup(devtype);
  51         }
  52
  53         t = arphrd_to_name(iftype);
  54         if (!t)
  55                 return NULL;
  56
  57         p = strdup(t);
  58         if (!p)
  59                 return NULL;
  60
  61         ascii_strlower(p);
  62         return p;
  63 }
  64
  65 static void operational_state_to_color(const char *state, const char **on, const char **off) {
  66         assert(on);
  67         assert(off);
  68
  69         if (streq_ptr(state, "routable")) {
  70                 *on = ansi_highlight_green();
  71                 *off = ansi_normal();
  72         } else if (streq_ptr(state, "degraded")) {
  73                 *on = ansi_highlight_yellow();
  74                 *off = ansi_normal();
  75         } else
  76                 *on = *off = "";
  77 }
  78
  79 static void setup_state_to_color(const char *state, const char **on, const char **off) {
  80         assert(on);
  81         assert(off);
  82
  83         if (streq_ptr(state, "configured")) {
  84                 *on = ansi_highlight_green();
  85                 *off = ansi_normal();
  86         } else if (streq_ptr(state, "configuring")) {
  87                 *on = ansi_highlight_yellow();
  88                 *off = ansi_normal();
  89         } else if (STRPTR_IN_SET(state, "failed", "linger")) {
  90                 *on = ansi_highlight_red();
  91                 *off = ansi_normal();
  92         } else
  93                 *on = *off = "";
  94 }
  95
  96 typedef struct LinkInfo {
  97         char name[IFNAMSIZ+1];
  98         int ifindex;
  99         unsigned short iftype;
 100         struct ether_addr mac_address;
 101         uint32_t mtu;
 102
 103         bool has_mac_address:1;
 104         bool has_mtu:1;
 105 } LinkInfo;
 106
 107 static int link_info_compare(const void *a, const void *b) {
 108         const LinkInfo *x = a, *y = b;
 109
 110         return x->ifindex - y->ifindex;
 111 }
 112
 113 static int decode_link(sd_netlink_message *m, LinkInfo *info) {
 114         const char *name;
 115         uint16_t type;
 116         int r;
 117
 118         assert(m);
 119         assert(info);
 120
 121         r = sd_netlink_message_get_type(m, &type);
 122         if (r < 0)
 123                 return r;
 124
 125         if (type != RTM_NEWLINK)
 126                 return 0;
 127
 128         r = sd_rtnl_message_link_get_ifindex(m, &info->ifindex);
 129         if (r < 0)
 130                 return r;
 131
 132         r = sd_netlink_message_read_string(m, IFLA_IFNAME, &name);
 133         if (r < 0)
 134                 return r;
 135
 136         r = sd_rtnl_message_link_get_type(m, &info->iftype);
 137         if (r < 0)
 138                 return r;
 139
 140         strscpy(info->name, sizeof info->name, name);
 141
 142         info->has_mac_address =
 143                 sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &info->mac_address) >= 0 &&
 144                 memcmp(&info->mac_address, &ETHER_ADDR_NULL, sizeof(struct ether_addr)) != 0;
 145
 146         info->has_mtu =
 147                 sd_netlink_message_read_u32(m, IFLA_MTU, &info->mtu) &&
 148                 info->mtu > 0;
 149
 150         return 1;
 151 }
 152
 153 static int acquire_link_info_strv(sd_netlink *rtnl, char **l, LinkInfo **ret) {
 154         _cleanup_free_ LinkInfo *links = NULL;
 155         char **i;
 156         size_t c = 0;
 157         int r;
 158
 159         assert(rtnl);
 160         assert(ret);
 161
 162         links = new(LinkInfo, strv_length(l));
 163         if (!links)
 164                 return log_oom();
 165
 166         STRV_FOREACH(i, l) {
 167                 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 168                 int ifindex;
 169
 170                 if (parse_ifindex(*i, &ifindex) >= 0)
 171                         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, ifindex);
 172                 else {
 173                         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
 174                         if (r < 0)
 175                                 return rtnl_log_create_error(r);
 176
 177                         r = sd_netlink_message_append_string(req, IFLA_IFNAME, *i);
 178                 }
 179                 if (r < 0)
 180                         return rtnl_log_create_error(r);
 181
 182                 r = sd_netlink_call(rtnl, req, 0, &reply);
 183                 if (r < 0)
 184                         return log_error_errno(r, "Failed to request link: %m");
 185
 186                 r = decode_link(reply, links + c);
 187                 if (r < 0)
 188                         return r;
 189                 if (r > 0)
 190                         c++;
 191         }
 192
 193         qsort_safe(links, c, sizeof(LinkInfo), link_info_compare);
 194
 195         *ret = TAKE_PTR(links);
 196
 197         return (int) c;
 198 }
 199
 200 static int acquire_link_info_all(sd_netlink *rtnl, LinkInfo **ret) {
 201         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 202         _cleanup_free_ LinkInfo *links = NULL;
 203         size_t allocated = 0, c = 0;
 204         sd_netlink_message *i;
 205         int r;
 206
 207         assert(rtnl);
 208         assert(ret);
 209
 210         r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
 211         if (r < 0)
 212                 return rtnl_log_create_error(r);
 213
 214         r = sd_netlink_message_request_dump(req, true);
 215         if (r < 0)
 216                 return rtnl_log_create_error(r);
 217
 218         r = sd_netlink_call(rtnl, req, 0, &reply);
 219         if (r < 0)
 220                 return log_error_errno(r, "Failed to enumerate links: %m");
 221
 222         for (i = reply; i; i = sd_netlink_message_next(i)) {
 223                 if (!GREEDY_REALLOC(links, allocated, c+1))
 224                         return -ENOMEM;
 225
 226                 r = decode_link(i, links + c);
 227                 if (r < 0)
 228                         return r;
 229                 if (r > 0)
 230                         c++;
 231         }
 232
 233         qsort_safe(links, c, sizeof(LinkInfo), link_info_compare);
 234
 235         *ret = TAKE_PTR(links);
 236
 237         return (int) c;
 238 }
 239
 240 static int list_links(int argc, char *argv[], void *userdata) {
 241         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 242         _cleanup_free_ LinkInfo *links = NULL;
 243         int c, i, r;
 244
 245         r = sd_netlink_open(&rtnl);
 246         if (r < 0)
 247                 return log_error_errno(r, "Failed to connect to netlink: %m");
 248
 249         if (argc > 1)
 250                 c = acquire_link_info_strv(rtnl, argv + 1, &links);
 251         else
 252                 c = acquire_link_info_all(rtnl, &links);
 253         if (c < 0)
 254                 return c;
 255
 256         (void) pager_open(arg_no_pager, false);
 257
 258         if (arg_legend)
 259                 printf("%3s %-16s %-18s %-11s %-10s\n",
 260                        "IDX",
 261                        "LINK",
 262                        "TYPE",
 263                        "OPERATIONAL",
 264                        "SETUP");
 265
 266         for (i = 0; i < c; i++) {
 267                 _cleanup_free_ char *setup_state = NULL, *operational_state = NULL;
 268                 _cleanup_(sd_device_unrefp) sd_device *d = NULL;
 269                 const char *on_color_operational, *off_color_operational,
 270                            *on_color_setup, *off_color_setup;
 271                 char devid[2 + DECIMAL_STR_MAX(int)];
 272                 _cleanup_free_ char *t = NULL;
 273
 274                 (void) sd_network_link_get_operational_state(links[i].ifindex, &operational_state);
 275                 operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 276
 277                 r = sd_network_link_get_setup_state(links[i].ifindex, &setup_state);
 278                 if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */
 279                         setup_state = strdup("unmanaged");
 280                 setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
 281
 282                 xsprintf(devid, "n%i", links[i].ifindex);
 283                 (void) sd_device_new_from_device_id(&d, devid);
 284
 285                 t = link_get_type_string(links[i].iftype, d);
 286
 287                 printf("%3i %-16s %-18s %s%-11s%s %s%-10s%s\n",
 288                        links[i].ifindex, links[i].name, strna(t),
 289                        on_color_operational, strna(operational_state), off_color_operational,
 290                        on_color_setup, strna(setup_state), off_color_setup);
 291         }
 292
 293         if (arg_legend)
 294                 printf("\n%i links listed.\n", c);
 295
 296         return 0;
 297 }
 298
 299 /* IEEE Organizationally Unique Identifier vendor string */
 300 static int ieee_oui(sd_hwdb *hwdb, const struct ether_addr *mac, char **ret) {
 301         const char *description;
 302         char modalias[STRLEN("OUI:XXYYXXYYXXYY") + 1], *desc;
 303         int r;
 304
 305         assert(ret);
 306
 307         if (!hwdb)
 308                 return -EINVAL;
 309
 310         if (!mac)
 311                 return -EINVAL;
 312
 313         /* skip commonly misused 00:00:00 (Xerox) prefix */
 314         if (memcmp(mac, "\0\0\0", 3) == 0)
 315                 return -EINVAL;
 316
 317         xsprintf(modalias, "OUI:" ETHER_ADDR_FORMAT_STR,
 318                  ETHER_ADDR_FORMAT_VAL(*mac));
 319
 320         r = sd_hwdb_get(hwdb, modalias, "ID_OUI_FROM_DATABASE", &description);
 321         if (r < 0)
 322                 return r;
 323
 324         desc = strdup(description);
 325         if (!desc)
 326                 return -ENOMEM;
 327
 328         *ret = desc;
 329
 330         return 0;
 331 }
 332
 333 static int get_gateway_description(
 334                 sd_netlink *rtnl,
 335                 sd_hwdb *hwdb,
 336                 int ifindex,
 337                 int family,
 338                 union in_addr_union *gateway,
 339                 char **gateway_description) {
 340         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 341         sd_netlink_message *m;
 342         int r;
 343
 344         assert(rtnl);
 345         assert(ifindex >= 0);
 346         assert(IN_SET(family, AF_INET, AF_INET6));
 347         assert(gateway);
 348         assert(gateway_description);
 349
 350         r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_GETNEIGH, ifindex, family);
 351         if (r < 0)
 352                 return r;
 353
 354         r = sd_netlink_message_request_dump(req, true);
 355         if (r < 0)
 356                 return r;
 357
 358         r = sd_netlink_call(rtnl, req, 0, &reply);
 359         if (r < 0)
 360                 return r;
 361
 362         for (m = reply; m; m = sd_netlink_message_next(m)) {
 363                 union in_addr_union gw = {};
 364                 struct ether_addr mac = {};
 365                 uint16_t type;
 366                 int ifi, fam;
 367
 368                 r = sd_netlink_message_get_errno(m);
 369                 if (r < 0) {
 370                         log_error_errno(r, "got error: %m");
 371                         continue;
 372                 }
 373
 374                 r = sd_netlink_message_get_type(m, &type);
 375                 if (r < 0) {
 376                         log_error_errno(r, "could not get type: %m");
 377                         continue;
 378                 }
 379
 380                 if (type != RTM_NEWNEIGH) {
 381                         log_error("type is not RTM_NEWNEIGH");
 382                         continue;
 383                 }
 384
 385                 r = sd_rtnl_message_neigh_get_family(m, &fam);
 386                 if (r < 0) {
 387                         log_error_errno(r, "could not get family: %m");
 388                         continue;
 389                 }
 390
 391                 if (fam != family) {
 392                         log_error("family is not correct");
 393                         continue;
 394                 }
 395
 396                 r = sd_rtnl_message_neigh_get_ifindex(m, &ifi);
 397                 if (r < 0) {
 398                         log_error_errno(r, "could not get ifindex: %m");
 399                         continue;
 400                 }
 401
 402                 if (ifindex > 0 && ifi != ifindex)
 403                         continue;
 404
 405                 switch (fam) {
 406                 case AF_INET:
 407                         r = sd_netlink_message_read_in_addr(m, NDA_DST, &gw.in);
 408                         if (r < 0)
 409                                 continue;
 410
 411                         break;
 412                 case AF_INET6:
 413                         r = sd_netlink_message_read_in6_addr(m, NDA_DST, &gw.in6);
 414                         if (r < 0)
 415                                 continue;
 416
 417                         break;
 418                 default:
 419                         continue;
 420                 }
 421
 422                 if (!in_addr_equal(fam, &gw, gateway))
 423                         continue;
 424
 425                 r = sd_netlink_message_read_ether_addr(m, NDA_LLADDR, &mac);
 426                 if (r < 0)
 427                         continue;
 428
 429                 r = ieee_oui(hwdb, &mac, gateway_description);
 430                 if (r < 0)
 431                         continue;
 432
 433                 return 0;
 434         }
 435
 436         return -ENODATA;
 437 }
 438
 439 static int dump_gateways(
 440                 sd_netlink *rtnl,
 441                 sd_hwdb *hwdb,
 442                 const char *prefix,
 443                 int ifindex) {
 444         _cleanup_free_ struct local_address *local = NULL;
 445         int r, n, i;
 446
 447         assert(rtnl);
 448         assert(prefix);
 449
 450         n = local_gateways(rtnl, ifindex, AF_UNSPEC, &local);
 451         if (n < 0)
 452                 return n;
 453
 454         for (i = 0; i < n; i++) {
 455                 _cleanup_free_ char *gateway = NULL, *description = NULL;
 456
 457                 r = in_addr_to_string(local[i].family, &local[i].address, &gateway);
 458                 if (r < 0)
 459                         return r;
 460
 461                 r = get_gateway_description(rtnl, hwdb, local[i].ifindex, local[i].family, &local[i].address, &description);
 462                 if (r < 0)
 463                         log_debug_errno(r, "Could not get description of gateway: %m");
 464
 465                 printf("%*s%s",
 466                        (int) strlen(prefix),
 467                        i == 0 ? prefix : "",
 468                        gateway);
 469
 470                 if (description)
 471                         printf(" (%s)", description);
 472
 473                 /* Show interface name for the entry if we show
 474                  * entries for all interfaces */
 475                 if (ifindex <= 0) {
 476                         char name[IF_NAMESIZE+1];
 477
 478                         if (if_indextoname(local[i].ifindex, name)) {
 479                                 fputs(" on ", stdout);
 480                                 fputs(name, stdout);
 481                         } else
 482                                 printf(" on %%%i", local[i].ifindex);
 483                 }
 484
 485                 fputc('\n', stdout);
 486         }
 487
 488         return 0;
 489 }
 490
 491 static int dump_addresses(
 492                 sd_netlink *rtnl,
 493                 const char *prefix,
 494                 int ifindex) {
 495
 496         _cleanup_free_ struct local_address *local = NULL;
 497         int r, n, i;
 498
 499         assert(rtnl);
 500         assert(prefix);
 501
 502         n = local_addresses(rtnl, ifindex, AF_UNSPEC, &local);
 503         if (n < 0)
 504                 return n;
 505
 506         for (i = 0; i < n; i++) {
 507                 _cleanup_free_ char *pretty = NULL;
 508
 509                 r = in_addr_to_string(local[i].family, &local[i].address, &pretty);
 510                 if (r < 0)
 511                         return r;
 512
 513                 printf("%*s%s",
 514                        (int) strlen(prefix),
 515                        i == 0 ? prefix : "",
 516                        pretty);
 517
 518                 if (ifindex <= 0) {
 519                         char name[IF_NAMESIZE+1];
 520
 521                         if (if_indextoname(local[i].ifindex, name)) {
 522                                 fputs(" on ", stdout);
 523                                 fputs(name, stdout);
 524                         } else
 525                                 printf(" on %%%i", local[i].ifindex);
 526                 }
 527
 528                 fputc('\n', stdout);
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int dump_address_labels(sd_netlink *rtnl) {
 535         _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
 536         sd_netlink_message *m;
 537         int r;
 538
 539         assert(rtnl);
 540
 541         r = sd_rtnl_message_new_addrlabel(rtnl, &req, RTM_GETADDRLABEL, 0, AF_INET6);
 542         if (r < 0)
 543                 return log_error_errno(r, "Could not allocate RTM_GETADDRLABEL message: %m");
 544
 545         r = sd_netlink_message_request_dump(req, true);
 546         if (r < 0)
 547                 return r;
 548
 549         r = sd_netlink_call(rtnl, req, 0, &reply);
 550         if (r < 0)
 551                 return r;
 552
 553         printf("%10s/%s %30s\n", "Prefix", "Prefixlen", "Label");
 554
 555         for (m = reply; m; m = sd_netlink_message_next(m)) {
 556                 _cleanup_free_ char *pretty = NULL;
 557                 union in_addr_union prefix = {};
 558                 uint8_t prefixlen;
 559                 uint32_t label;
 560
 561                 r = sd_netlink_message_get_errno(m);
 562                 if (r < 0) {
 563                         log_error_errno(r, "got error: %m");
 564                         continue;
 565                 }
 566
 567                 r = sd_netlink_message_read_u32(m, IFAL_LABEL, &label);
 568                 if (r < 0 && r != -ENODATA) {
 569                         log_error_errno(r, "Could not read IFAL_LABEL, ignoring: %m");
 570                         continue;
 571                 }
 572
 573                 r = sd_netlink_message_read_in6_addr(m, IFAL_ADDRESS, &prefix.in6);
 574                 if (r < 0)
 575                         continue;
 576
 577                 r = in_addr_to_string(AF_INET6, &prefix, &pretty);
 578                 if (r < 0)
 579                         continue;
 580
 581                 r = sd_rtnl_message_addrlabel_get_prefixlen(m, &prefixlen);
 582                 if (r < 0)
 583                         continue;
 584
 585                 printf("%10s/%-5u %30u\n", pretty, prefixlen, label);
 586         }
 587
 588         return 0;
 589 }
 590
 591 static int list_address_labels(int argc, char *argv[], void *userdata) {
 592         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 593         int r;
 594
 595         r = sd_netlink_open(&rtnl);
 596         if (r < 0)
 597                 return log_error_errno(r, "Failed to connect to netlink: %m");
 598
 599         dump_address_labels(rtnl);
 600
 601         return 0;
 602 }
 603
 604 static int open_lldp_neighbors(int ifindex, FILE **ret) {
 605         _cleanup_free_ char *p = NULL;
 606         FILE *f;
 607
 608         if (asprintf(&p, "/run/systemd/netif/lldp/%i", ifindex) < 0)
 609                 return -ENOMEM;
 610
 611         f = fopen(p, "re");
 612         if (!f)
 613                 return -errno;
 614
 615         *ret = f;
 616         return 0;
 617 }
 618
 619 static int next_lldp_neighbor(FILE *f, sd_lldp_neighbor **ret) {
 620         _cleanup_free_ void *raw = NULL;
 621         size_t l;
 622         le64_t u;
 623         int r;
 624
 625         assert(f);
 626         assert(ret);
 627
 628         l = fread(&u, 1, sizeof(u), f);
 629         if (l == 0 && feof(f))
 630                 return 0;
 631         if (l != sizeof(u))
 632                 return -EBADMSG;
 633
 634         /* each LLDP packet is at most MTU size, but let's allow up to 4KiB just in case */
 635         if (le64toh(u) >= 4096)
 636                 return -EBADMSG;
 637
 638         raw = new(uint8_t, le64toh(u));
 639         if (!raw)
 640                 return -ENOMEM;
 641
 642         if (fread(raw, 1, le64toh(u), f) != le64toh(u))
 643                 return -EBADMSG;
 644
 645         r = sd_lldp_neighbor_from_raw(ret, raw, le64toh(u));
 646         if (r < 0)
 647                 return r;
 648
 649         return 1;
 650 }
 651
 652 static int dump_lldp_neighbors(const char *prefix, int ifindex) {
 653         _cleanup_fclose_ FILE *f = NULL;
 654         int r, c = 0;
 655
 656         assert(prefix);
 657         assert(ifindex > 0);
 658
 659         r = open_lldp_neighbors(ifindex, &f);
 660         if (r < 0)
 661                 return r;
 662
 663         for (;;) {
 664                 const char *system_name = NULL, *port_id = NULL, *port_description = NULL;
 665                 _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
 666
 667                 r = next_lldp_neighbor(f, &n);
 668                 if (r < 0)
 669                         return r;
 670                 if (r == 0)
 671                         break;
 672
 673                 printf("%*s",
 674                        (int) strlen(prefix),
 675                        c == 0 ? prefix : "");
 676
 677                 (void) sd_lldp_neighbor_get_system_name(n, &system_name);
 678                 (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id);
 679                 (void) sd_lldp_neighbor_get_port_description(n, &port_description);
 680
 681                 printf("%s on port %s", strna(system_name), strna(port_id));
 682
 683                 if (!isempty(port_description))
 684                         printf(" (%s)", port_description);
 685
 686                 putchar('\n');
 687
 688                 c++;
 689         }
 690
 691         return c;
 692 }
 693
 694 static void dump_ifindexes(const char *prefix, const int *ifindexes) {
 695         unsigned c;
 696
 697         assert(prefix);
 698
 699         if (!ifindexes || ifindexes[0] <= 0)
 700                 return;
 701
 702         for (c = 0; ifindexes[c] > 0; c++) {
 703                 char name[IF_NAMESIZE+1];
 704
 705                 printf("%*s",
 706                        (int) strlen(prefix),
 707                        c == 0 ? prefix : "");
 708
 709                 if (if_indextoname(ifindexes[c], name))
 710                         fputs(name, stdout);
 711                 else
 712                         printf("%i", ifindexes[c]);
 713
 714                 fputc('\n', stdout);
 715         }
 716 }
 717
 718 static void dump_list(const char *prefix, char **l) {
 719         char **i;
 720
 721         if (strv_isempty(l))
 722                 return;
 723
 724         STRV_FOREACH(i, l) {
 725                 printf("%*s%s\n",
 726                        (int) strlen(prefix),
 727                        i == l ? prefix : "",
 728                        *i);
 729         }
 730 }
 731
 732 static int link_status_one(
 733                 sd_netlink *rtnl,
 734                 sd_hwdb *hwdb,
 735                 const LinkInfo *info) {
 736
 737         _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL;
 738         _cleanup_free_ char *setup_state = NULL, *operational_state = NULL, *tz = NULL;
 739         _cleanup_(sd_device_unrefp) sd_device *d = NULL;
 740         char devid[2 + DECIMAL_STR_MAX(int)];
 741         _cleanup_free_ char *t = NULL, *network = NULL;
 742         const char *driver = NULL, *path = NULL, *vendor = NULL, *model = NULL, *link = NULL;
 743         const char *on_color_operational, *off_color_operational,
 744                    *on_color_setup, *off_color_setup;
 745         _cleanup_free_ int *carrier_bound_to = NULL, *carrier_bound_by = NULL;
 746         int r;
 747
 748         assert(rtnl);
 749         assert(info);
 750
 751         (void) sd_network_link_get_operational_state(info->ifindex, &operational_state);
 752         operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 753
 754         r = sd_network_link_get_setup_state(info->ifindex, &setup_state);
 755         if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */
 756                 setup_state = strdup("unmanaged");
 757         setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
 758
 759         (void) sd_network_link_get_dns(info->ifindex, &dns);
 760         (void) sd_network_link_get_search_domains(info->ifindex, &search_domains);
 761         (void) sd_network_link_get_route_domains(info->ifindex, &route_domains);
 762         (void) sd_network_link_get_ntp(info->ifindex, &ntp);
 763
 764         xsprintf(devid, "n%i", info->ifindex);
 765
 766         (void) sd_device_new_from_device_id(&d, devid);
 767
 768         if (d) {
 769                 (void) sd_device_get_property_value(d, "ID_NET_LINK_FILE", &link);
 770                 (void) sd_device_get_property_value(d, "ID_NET_DRIVER", &driver);
 771                 (void) sd_device_get_property_value(d, "ID_PATH", &path);
 772
 773                 r = sd_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE", &vendor);
 774                 if (r < 0)
 775                         (void) sd_device_get_property_value(d, "ID_VENDOR", &vendor);
 776
 777                 r = sd_device_get_property_value(d, "ID_MODEL_FROM_DATABASE", &model);
 778                 if (r < 0)
 779                         (void) sd_device_get_property_value(d, "ID_MODEL", &model);
 780         }
 781
 782         t = link_get_type_string(info->iftype, d);
 783
 784         (void) sd_network_link_get_network_file(info->ifindex, &network);
 785
 786         (void) sd_network_link_get_carrier_bound_to(info->ifindex, &carrier_bound_to);
 787         (void) sd_network_link_get_carrier_bound_by(info->ifindex, &carrier_bound_by);
 788
 789         printf("%s%s%s %i: %s\n", on_color_operational, special_glyph(BLACK_CIRCLE), off_color_operational, info->ifindex, info->name);
 790
 791         printf("       Link File: %s\n"
 792                "    Network File: %s\n"
 793                "            Type: %s\n"
 794                "           State: %s%s%s (%s%s%s)\n",
 795                strna(link),
 796                strna(network),
 797                strna(t),
 798                on_color_operational, strna(operational_state), off_color_operational,
 799                on_color_setup, strna(setup_state), off_color_setup);
 800
 801         if (path)
 802                 printf("            Path: %s\n", path);
 803         if (driver)
 804                 printf("          Driver: %s\n", driver);
 805         if (vendor)
 806                 printf("          Vendor: %s\n", vendor);
 807         if (model)
 808                 printf("           Model: %s\n", model);
 809
 810         if (info->has_mac_address) {
 811                 _cleanup_free_ char *description = NULL;
 812                 char ea[ETHER_ADDR_TO_STRING_MAX];
 813
 814                 (void) ieee_oui(hwdb, &info->mac_address, &description);
 815
 816                 if (description)
 817                         printf("      HW Address: %s (%s)\n", ether_addr_to_string(&info->mac_address, ea), description);
 818                 else
 819                         printf("      HW Address: %s\n", ether_addr_to_string(&info->mac_address, ea));
 820         }
 821
 822         if (info->has_mtu)
 823                 printf("             MTU: %" PRIu32 "\n", info->mtu);
 824
 825         (void) dump_addresses(rtnl, "         Address: ", info->ifindex);
 826         (void) dump_gateways(rtnl, hwdb, "         Gateway: ", info->ifindex);
 827
 828         dump_list("             DNS: ", dns);
 829         dump_list("  Search Domains: ", search_domains);
 830         dump_list("   Route Domains: ", route_domains);
 831
 832         dump_list("             NTP: ", ntp);
 833
 834         dump_ifindexes("Carrier Bound To: ", carrier_bound_to);
 835         dump_ifindexes("Carrier Bound By: ", carrier_bound_by);
 836
 837         (void) sd_network_link_get_timezone(info->ifindex, &tz);
 838         if (tz)
 839                 printf("       Time Zone: %s\n", tz);
 840
 841         (void) dump_lldp_neighbors("    Connected To: ", info->ifindex);
 842
 843         return 0;
 844 }
 845
 846 static int system_status(sd_netlink *rtnl, sd_hwdb *hwdb) {
 847         _cleanup_free_ char *operational_state = NULL;
 848         _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL;
 849         const char *on_color_operational, *off_color_operational;
 850
 851         assert(rtnl);
 852
 853         (void) sd_network_get_operational_state(&operational_state);
 854         operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
 855
 856         printf("%s%s%s        State: %s%s%s\n",
 857                on_color_operational, special_glyph(BLACK_CIRCLE), off_color_operational,
 858                on_color_operational, strna(operational_state), off_color_operational);
 859
 860         (void) dump_addresses(rtnl, "       Address: ", 0);
 861         (void) dump_gateways(rtnl, hwdb, "       Gateway: ", 0);
 862
 863         (void) sd_network_get_dns(&dns);
 864         dump_list("           DNS: ", dns);
 865
 866         (void) sd_network_get_search_domains(&search_domains);
 867         dump_list("Search Domains: ", search_domains);
 868
 869         (void) sd_network_get_route_domains(&route_domains);
 870         dump_list(" Route Domains: ", route_domains);
 871
 872         (void) sd_network_get_ntp(&ntp);
 873         dump_list("           NTP: ", ntp);
 874
 875         return 0;
 876 }
 877
 878 static int link_status(int argc, char *argv[], void *userdata) {
 879         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 880         _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
 881         _cleanup_free_ LinkInfo *links = NULL;
 882         int r, c, i;
 883
 884         (void) pager_open(arg_no_pager, false);
 885
 886         r = sd_netlink_open(&rtnl);
 887         if (r < 0)
 888                 return log_error_errno(r, "Failed to connect to netlink: %m");
 889
 890         r = sd_hwdb_new(&hwdb);
 891         if (r < 0)
 892                 log_debug_errno(r, "Failed to open hardware database: %m");
 893
 894         if (arg_all)
 895                 c = acquire_link_info_all(rtnl, &links);
 896         else if (argc <= 1)
 897                 return system_status(rtnl, hwdb);
 898         else
 899                 c = acquire_link_info_strv(rtnl, argv + 1, &links);
 900         if (c < 0)
 901                 return c;
 902
 903         for (i = 0; i < c; i++) {
 904                 if (i > 0)
 905                         fputc('\n', stdout);
 906
 907                 link_status_one(rtnl, hwdb, links + i);
 908         }
 909
 910         return 0;
 911 }
 912
 913 static char *lldp_capabilities_to_string(uint16_t x) {
 914         static const char characters[] = {
 915                 'o', 'p', 'b', 'w', 'r', 't', 'd', 'a', 'c', 's', 'm',
 916         };
 917         char *ret;
 918         unsigned i;
 919
 920         ret = new(char, ELEMENTSOF(characters) + 1);
 921         if (!ret)
 922                 return NULL;
 923
 924         for (i = 0; i < ELEMENTSOF(characters); i++)
 925                 ret[i] = (x & (1U << i)) ? characters[i] : '.';
 926
 927         ret[i] = 0;
 928         return ret;
 929 }
 930
 931 static void lldp_capabilities_legend(uint16_t x) {
 932         unsigned w, i, cols = columns();
 933         static const char* const table[] = {
 934                 "o - Other",
 935                 "p - Repeater",
 936                 "b - Bridge",
 937                 "w - WLAN Access Point",
 938                 "r - Router",
 939                 "t - Telephone",
 940                 "d - DOCSIS cable device",
 941                 "a - Station",
 942                 "c - Customer VLAN",
 943                 "s - Service VLAN",
 944                 "m - Two-port MAC Relay (TPMR)",
 945         };
 946
 947         if (x == 0)
 948                 return;
 949
 950         printf("\nCapability Flags:\n");
 951         for (w = 0, i = 0; i < ELEMENTSOF(table); i++)
 952                 if (x & (1U << i) || arg_all) {
 953                         bool newline;
 954
 955                         newline = w + strlen(table[i]) + (w == 0 ? 0 : 2) > cols;
 956                         if (newline)
 957                                 w = 0;
 958                         w += printf("%s%s%s", newline ? "\n" : "", w == 0 ? "" : "; ", table[i]);
 959                 }
 960         puts("");
 961 }
 962
 963 static int link_lldp_status(int argc, char *argv[], void *userdata) {
 964         _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
 965         _cleanup_free_ LinkInfo *links = NULL;
 966         int i, r, c, m = 0;
 967         uint16_t all = 0;
 968
 969         r = sd_netlink_open(&rtnl);
 970         if (r < 0)
 971                 return log_error_errno(r, "Failed to connect to netlink: %m");
 972
 973         if (argc > 1)
 974                 c = acquire_link_info_strv(rtnl, argv + 1, &links);
 975         else
 976                 c = acquire_link_info_all(rtnl, &links);
 977         if (c < 0)
 978                 return c;
 979
 980         (void) pager_open(arg_no_pager, false);
 981
 982         if (arg_legend)
 983                 printf("%-16s %-17s %-16s %-11s %-17s %-16s\n",
 984                        "LINK",
 985                        "CHASSIS ID",
 986                        "SYSTEM NAME",
 987                        "CAPS",
 988                        "PORT ID",
 989                        "PORT DESCRIPTION");
 990
 991         for (i = 0; i < c; i++) {
 992                 _cleanup_fclose_ FILE *f = NULL;
 993
 994                 r = open_lldp_neighbors(links[i].ifindex, &f);
 995                 if (r == -ENOENT)
 996                         continue;
 997                 if (r < 0) {
 998                         log_warning_errno(r, "Failed to open LLDP data for %i, ignoring: %m", links[i].ifindex);
 999                         continue;
1000                 }
1001
1002                 for (;;) {
1003                         _cleanup_free_ char *cid = NULL, *pid = NULL, *sname = NULL, *pdesc = NULL;
1004                         const char *chassis_id = NULL, *port_id = NULL, *system_name = NULL, *port_description = NULL, *capabilities = NULL;
1005                         _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL;
1006                         uint16_t cc;
1007
1008                         r = next_lldp_neighbor(f, &n);
1009                         if (r < 0) {
1010                                 log_warning_errno(r, "Failed to read neighbor data: %m");
1011                                 break;
1012                         }
1013                         if (r == 0)
1014                                 break;
1015
1016                         (void) sd_lldp_neighbor_get_chassis_id_as_string(n, &chassis_id);
1017                         (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id);
1018                         (void) sd_lldp_neighbor_get_system_name(n, &system_name);
1019                         (void) sd_lldp_neighbor_get_port_description(n, &port_description);
1020
1021                         if (chassis_id) {
1022                                 cid = ellipsize(chassis_id, 17, 100);
1023                                 if (cid)
1024                                         chassis_id = cid;
1025                         }
1026
1027                         if (port_id) {
1028                                 pid = ellipsize(port_id, 17, 100);
1029                                 if (pid)
1030                                         port_id = pid;
1031                         }
1032
1033                         if (system_name) {
1034                                 sname = ellipsize(system_name, 16, 100);
1035                                 if (sname)
1036                                         system_name = sname;
1037                         }
1038
1039                         if (port_description) {
1040                                 pdesc = ellipsize(port_description, 16, 100);
1041                                 if (pdesc)
1042                                         port_description = pdesc;
1043                         }
1044
1045                         if (sd_lldp_neighbor_get_enabled_capabilities(n, &cc) >= 0) {
1046                                 capabilities = lldp_capabilities_to_string(cc);
1047                                 all |= cc;
1048                         }
1049
1050                         printf("%-16s %-17s %-16s %-11s %-17s %-16s\n",
1051                                links[i].name,
1052                                strna(chassis_id),
1053                                strna(system_name),
1054                                strna(capabilities),
1055                                strna(port_id),
1056                                strna(port_description));
1057
1058                         m++;
1059                 }
1060         }
1061
1062         if (arg_legend) {
1063                 lldp_capabilities_legend(all);
1064                 printf("\n%i neighbors listed.\n", m);
1065         }
1066
1067         return 0;
1068 }
1069
1070 static int help(void) {
1071         _cleanup_free_ char *link = NULL;
1072         int r;
1073
1074         r = terminal_urlify_man("networkctl", "1", &link);
1075         if (r < 0)
1076                 return log_oom();
1077
1078         printf("%s [OPTIONS...]\n\n"
1079                "Query and control the networking subsystem.\n\n"
1080                "  -h --help             Show this help\n"
1081                "     --version          Show package version\n"
1082                "     --no-pager         Do not pipe output into a pager\n"
1083                "     --no-legend        Do not show the headers and footers\n"
1084                "  -a --all              Show status for all links\n\n"
1085                "Commands:\n"
1086                "  list [LINK...]        List links\n"
1087                "  status [LINK...]      Show link status\n"
1088                "  lldp [LINK...]        Show LLDP neighbors\n"
1089                "  label                 Show current address label entries in the kernel\n"
1090                "\nSee the %s for details.\n"
1091                , program_invocation_short_name
1092                , link
1093         );
1094
1095         return 0;
1096 }
1097
1098 static int parse_argv(int argc, char *argv[]) {
1099
1100         enum {
1101                 ARG_VERSION = 0x100,
1102                 ARG_NO_PAGER,
1103                 ARG_NO_LEGEND,
1104         };
1105
1106         static const struct option options[] = {
1107                 { "help",      no_argument,       NULL, 'h'           },
1108                 { "version",   no_argument,       NULL, ARG_VERSION   },
1109                 { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
1110                 { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
1111                 { "all",       no_argument,       NULL, 'a'           },
1112                 {}
1113         };
1114
1115         int c;
1116
1117         assert(argc >= 0);
1118         assert(argv);
1119
1120         while ((c = getopt_long(argc, argv, "ha", options, NULL)) >= 0) {
1121
1122                 switch (c) {
1123
1124                 case 'h':
1125                         return help();
1126
1127                 case ARG_VERSION:
1128                         return version();
1129
1130                 case ARG_NO_PAGER:
1131                         arg_no_pager = true;
1132                         break;
1133
1134                 case ARG_NO_LEGEND:
1135                         arg_legend = false;
1136                         break;
1137
1138                 case 'a':
1139                         arg_all = true;
1140                         break;
1141
1142                 case '?':
1143                         return -EINVAL;
1144
1145                 default:
1146                         assert_not_reached("Unhandled option");
1147                 }
1148         }
1149
1150         return 1;
1151 }
1152
1153 static int networkctl_main(int argc, char *argv[]) {
1154         static const Verb verbs[] = {
1155                 { "list",   VERB_ANY, VERB_ANY, VERB_DEFAULT, list_links          },
1156                 { "status", VERB_ANY, VERB_ANY, 0,            link_status         },
1157                 { "lldp",   VERB_ANY, VERB_ANY, 0,            link_lldp_status    },
1158                 { "label",  VERB_ANY, VERB_ANY, 0,            list_address_labels },
1159                 {}
1160         };
1161
1162         return dispatch_verb(argc, argv, verbs, NULL);
1163 }
1164
1165 static void warn_networkd_missing(void) {
1166
1167         if (access("/run/systemd/netif/state", F_OK) >= 0)
1168                 return;
1169
1170         fprintf(stderr, "WARNING: systemd-networkd is not running, output will be incomplete.\n\n");
1171 }
1172
1173 int main(int argc, char* argv[]) {
1174         int r;
1175
1176         log_parse_environment();
1177         log_open();
1178
1179         r = parse_argv(argc, argv);
1180         if (r <= 0)
1181                 goto finish;
1182
1183         warn_networkd_missing();
1184
1185         r = networkctl_main(argc, argv);
1186
1187 finish:
1188         pager_close();
1189
1190         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1191 }