ip/iplink_vxlan.c

   1 /*
   2  * iplink_vxlan.c       VXLAN device support
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Stephen Hemminger <shemminger@vyatta.com
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <net/if.h>
  16 #include <linux/ip.h>
  17 #include <linux/if_link.h>
  18 #include <arpa/inet.h>
  19
  20 #include "rt_names.h"
  21 #include "utils.h"
  22 #include "ip_common.h"
  23
  24 #define VXLAN_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
  25
  26 static void print_explain(FILE *f)
  27 {
  28         fprintf(f,
  29                 "Usage: ... vxlan id VNI\n"
  30                 "                 [ { group | remote } IP_ADDRESS ]\n"
  31                 "                 [ local ADDR ]\n"
  32                 "                 [ ttl TTL ]\n"
  33                 "                 [ tos TOS ]\n"
  34                 "                 [ df DF ]\n"
  35                 "                 [ flowlabel LABEL ]\n"
  36                 "                 [ dev PHYS_DEV ]\n"
  37                 "                 [ dstport PORT ]\n"
  38                 "                 [ srcport MIN MAX ]\n"
  39                 "                 [ [no]learning ]\n"
  40                 "                 [ [no]proxy ]\n"
  41                 "                 [ [no]rsc ]\n"
  42                 "                 [ [no]l2miss ]\n"
  43                 "                 [ [no]l3miss ]\n"
  44                 "                 [ ageing SECONDS ]\n"
  45                 "                 [ maxaddress NUMBER ]\n"
  46                 "                 [ [no]udpcsum ]\n"
  47                 "                 [ [no]udp6zerocsumtx ]\n"
  48                 "                 [ [no]udp6zerocsumrx ]\n"
  49                 "                 [ [no]remcsumtx ] [ [no]remcsumrx ]\n"
  50                 "                 [ [no]external ] [ gbp ] [ gpe ]\n"
  51                 "\n"
  52                 "Where: VNI   := 0-16777215\n"
  53                 "       ADDR  := { IP_ADDRESS | any }\n"
  54                 "       TOS   := { NUMBER | inherit }\n"
  55                 "       TTL   := { 1..255 | auto | inherit }\n"
  56                 "       DF    := { unset | set | inherit }\n"
  57                 "       LABEL := 0-1048575\n"
  58         );
  59 }
  60
  61 static void explain(void)
  62 {
  63         print_explain(stderr);
  64 }
  65
  66 static void check_duparg(__u64 *attrs, int type, const char *key,
  67                          const char *argv)
  68 {
  69         if (!VXLAN_ATTRSET(*attrs, type)) {
  70                 *attrs |= (1L << type);
  71                 return;
  72         }
  73         duparg2(key, argv);
  74 }
  75
  76 static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
  77                           struct nlmsghdr *n)
  78 {
  79         inet_prefix saddr, daddr;
  80         __u32 vni = 0;
  81         __u8 learning = 1;
  82         __u16 dstport = 0;
  83         __u8 metadata = 0;
  84         __u64 attrs = 0;
  85         bool set_op = (n->nlmsg_type == RTM_NEWLINK &&
  86                        !(n->nlmsg_flags & NLM_F_CREATE));
  87         bool selected_family = false;
  88
  89         saddr.family = daddr.family = AF_UNSPEC;
  90
  91         inet_prefix_reset(&saddr);
  92         inet_prefix_reset(&daddr);
  93
  94         while (argc > 0) {
  95                 if (!matches(*argv, "id") ||
  96                     !matches(*argv, "vni")) {
  97                         /* We will add ID attribute outside of the loop since we
  98                          * need to consider metadata information as well.
  99                          */
 100                         NEXT_ARG();
 101                         check_duparg(&attrs, IFLA_VXLAN_ID, "id", *argv);
 102                         if (get_u32(&vni, *argv, 0) ||
 103                             vni >= 1u << 24)
 104                                 invarg("invalid id", *argv);
 105                 } else if (!matches(*argv, "group")) {
 106                         if (is_addrtype_inet_not_multi(&daddr)) {
 107                                 fprintf(stderr, "vxlan: both group and remote");
 108                                 fprintf(stderr, " cannot be specified\n");
 109                                 return -1;
 110                         }
 111                         NEXT_ARG();
 112                         check_duparg(&attrs, IFLA_VXLAN_GROUP, "group", *argv);
 113                         get_addr(&daddr, *argv, saddr.family);
 114                         if (!is_addrtype_inet_multi(&daddr))
 115                                 invarg("invalid group address", *argv);
 116                 } else if (!matches(*argv, "remote")) {
 117                         if (is_addrtype_inet_multi(&daddr)) {
 118                                 fprintf(stderr, "vxlan: both group and remote");
 119                                 fprintf(stderr, " cannot be specified\n");
 120                                 return -1;
 121                         }
 122                         NEXT_ARG();
 123                         check_duparg(&attrs, IFLA_VXLAN_GROUP, "remote", *argv);
 124                         get_addr(&daddr, *argv, saddr.family);
 125                         if (!is_addrtype_inet_not_multi(&daddr))
 126                                 invarg("invalid remote address", *argv);
 127                 } else if (!matches(*argv, "local")) {
 128                         NEXT_ARG();
 129                         check_duparg(&attrs, IFLA_VXLAN_LOCAL, "local", *argv);
 130                         get_addr(&saddr, *argv, daddr.family);
 131                         if (!is_addrtype_inet_not_multi(&saddr))
 132                                 invarg("invalid local address", *argv);
 133                 } else if (!matches(*argv, "dev")) {
 134                         unsigned int link;
 135
 136                         NEXT_ARG();
 137                         check_duparg(&attrs, IFLA_VXLAN_LINK, "dev", *argv);
 138                         link = ll_name_to_index(*argv);
 139                         if (!link)
 140                                 exit(nodev(*argv));
 141                         addattr32(n, 1024, IFLA_VXLAN_LINK, link);
 142                 } else if (!matches(*argv, "ttl") ||
 143                            !matches(*argv, "hoplimit")) {
 144                         unsigned int uval;
 145                         __u8 ttl = 0;
 146
 147                         NEXT_ARG();
 148                         check_duparg(&attrs, IFLA_VXLAN_TTL, "ttl", *argv);
 149                         if (strcmp(*argv, "inherit") == 0) {
 150                                 addattr(n, 1024, IFLA_VXLAN_TTL_INHERIT);
 151                         } else if (strcmp(*argv, "auto") == 0) {
 152                                 addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);
 153                         } else {
 154                                 if (get_unsigned(&uval, *argv, 0))
 155                                         invarg("invalid TTL", *argv);
 156                                 if (uval > 255)
 157                                         invarg("TTL must be <= 255", *argv);
 158                                 ttl = uval;
 159                                 addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);
 160                         }
 161                 } else if (!matches(*argv, "tos") ||
 162                            !matches(*argv, "dsfield")) {
 163                         __u32 uval;
 164                         __u8 tos;
 165
 166                         NEXT_ARG();
 167                         check_duparg(&attrs, IFLA_VXLAN_TOS, "tos", *argv);
 168                         if (strcmp(*argv, "inherit") != 0) {
 169                                 if (rtnl_dsfield_a2n(&uval, *argv))
 170                                         invarg("bad TOS value", *argv);
 171                                 tos = uval;
 172                         } else
 173                                 tos = 1;
 174                         addattr8(n, 1024, IFLA_VXLAN_TOS, tos);
 175                 } else if (!matches(*argv, "df")) {
 176                         enum ifla_vxlan_df df;
 177
 178                         NEXT_ARG();
 179                         check_duparg(&attrs, IFLA_VXLAN_DF, "df", *argv);
 180                         if (strcmp(*argv, "unset") == 0)
 181                                 df = VXLAN_DF_UNSET;
 182                         else if (strcmp(*argv, "set") == 0)
 183                                 df = VXLAN_DF_SET;
 184                         else if (strcmp(*argv, "inherit") == 0)
 185                                 df = VXLAN_DF_INHERIT;
 186                         else
 187                                 invarg("DF must be 'unset', 'set' or 'inherit'",
 188                                        *argv);
 189
 190                         addattr8(n, 1024, IFLA_VXLAN_DF, df);
 191                 } else if (!matches(*argv, "label") ||
 192                            !matches(*argv, "flowlabel")) {
 193                         __u32 uval;
 194
 195                         NEXT_ARG();
 196                         check_duparg(&attrs, IFLA_VXLAN_LABEL, "flowlabel",
 197                                      *argv);
 198                         if (get_u32(&uval, *argv, 0) ||
 199                             (uval & ~LABEL_MAX_MASK))
 200                                 invarg("invalid flowlabel", *argv);
 201                         addattr32(n, 1024, IFLA_VXLAN_LABEL, htonl(uval));
 202                 } else if (!matches(*argv, "ageing")) {
 203                         __u32 age;
 204
 205                         NEXT_ARG();
 206                         check_duparg(&attrs, IFLA_VXLAN_AGEING, "ageing",
 207                                      *argv);
 208                         if (strcmp(*argv, "none") == 0)
 209                                 age = 0;
 210                         else if (get_u32(&age, *argv, 0))
 211                                 invarg("ageing timer", *argv);
 212                         addattr32(n, 1024, IFLA_VXLAN_AGEING, age);
 213                 } else if (!matches(*argv, "maxaddress")) {
 214                         __u32 maxaddr;
 215
 216                         NEXT_ARG();
 217                         check_duparg(&attrs, IFLA_VXLAN_LIMIT,
 218                                      "maxaddress", *argv);
 219                         if (strcmp(*argv, "unlimited") == 0)
 220                                 maxaddr = 0;
 221                         else if (get_u32(&maxaddr, *argv, 0))
 222                                 invarg("max addresses", *argv);
 223                         addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr);
 224                 } else if (!matches(*argv, "port") ||
 225                            !matches(*argv, "srcport")) {
 226                         struct ifla_vxlan_port_range range = { 0, 0 };
 227
 228                         NEXT_ARG();
 229                         check_duparg(&attrs, IFLA_VXLAN_PORT_RANGE, "srcport",
 230                                      *argv);
 231                         if (get_be16(&range.low, *argv, 0))
 232                                 invarg("min port", *argv);
 233                         NEXT_ARG();
 234                         if (get_be16(&range.high, *argv, 0))
 235                                 invarg("max port", *argv);
 236                         if (range.low || range.high) {
 237                                 addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE,
 238                                           &range, sizeof(range));
 239                         }
 240                 } else if (!matches(*argv, "dstport")) {
 241                         NEXT_ARG();
 242                         check_duparg(&attrs, IFLA_VXLAN_PORT, "dstport", *argv);
 243                         if (get_u16(&dstport, *argv, 0))
 244                                 invarg("dst port", *argv);
 245                 } else if (!matches(*argv, "nolearning")) {
 246                         check_duparg(&attrs, IFLA_VXLAN_LEARNING, *argv, *argv);
 247                         learning = 0;
 248                 } else if (!matches(*argv, "learning")) {
 249                         check_duparg(&attrs, IFLA_VXLAN_LEARNING, *argv, *argv);
 250                         learning = 1;
 251                 } else if (!matches(*argv, "noproxy")) {
 252                         check_duparg(&attrs, IFLA_VXLAN_PROXY, *argv, *argv);
 253                         addattr8(n, 1024, IFLA_VXLAN_PROXY, 0);
 254                 } else if (!matches(*argv, "proxy")) {
 255                         check_duparg(&attrs, IFLA_VXLAN_PROXY, *argv, *argv);
 256                         addattr8(n, 1024, IFLA_VXLAN_PROXY, 1);
 257                 } else if (!matches(*argv, "norsc")) {
 258                         check_duparg(&attrs, IFLA_VXLAN_RSC, *argv, *argv);
 259                         addattr8(n, 1024, IFLA_VXLAN_RSC, 0);
 260                 } else if (!matches(*argv, "rsc")) {
 261                         check_duparg(&attrs, IFLA_VXLAN_RSC, *argv, *argv);
 262                         addattr8(n, 1024, IFLA_VXLAN_RSC, 1);
 263                 } else if (!matches(*argv, "nol2miss")) {
 264                         check_duparg(&attrs, IFLA_VXLAN_L2MISS, *argv, *argv);
 265                         addattr8(n, 1024, IFLA_VXLAN_L2MISS, 0);
 266                 } else if (!matches(*argv, "l2miss")) {
 267                         check_duparg(&attrs, IFLA_VXLAN_L2MISS, *argv, *argv);
 268                         addattr8(n, 1024, IFLA_VXLAN_L2MISS, 1);
 269                 } else if (!matches(*argv, "nol3miss")) {
 270                         check_duparg(&attrs, IFLA_VXLAN_L3MISS, *argv, *argv);
 271                         addattr8(n, 1024, IFLA_VXLAN_L3MISS, 0);
 272                 } else if (!matches(*argv, "l3miss")) {
 273                         check_duparg(&attrs, IFLA_VXLAN_L3MISS, *argv, *argv);
 274                         addattr8(n, 1024, IFLA_VXLAN_L3MISS, 1);
 275                 } else if (!matches(*argv, "udpcsum")) {
 276                         check_duparg(&attrs, IFLA_VXLAN_UDP_CSUM, *argv, *argv);
 277                         addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, 1);
 278                 } else if (!matches(*argv, "noudpcsum")) {
 279                         check_duparg(&attrs, IFLA_VXLAN_UDP_CSUM, *argv, *argv);
 280                         addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, 0);
 281                 } else if (!matches(*argv, "udp6zerocsumtx")) {
 282                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
 283                                      *argv, *argv);
 284                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, 1);
 285                 } else if (!matches(*argv, "noudp6zerocsumtx")) {
 286                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
 287                                      *argv, *argv);
 288                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, 0);
 289                 } else if (!matches(*argv, "udp6zerocsumrx")) {
 290                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
 291                                      *argv, *argv);
 292                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, 1);
 293                 } else if (!matches(*argv, "noudp6zerocsumrx")) {
 294                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
 295                                      *argv, *argv);
 296                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, 0);
 297                 } else if (!matches(*argv, "remcsumtx")) {
 298                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_TX,
 299                                      *argv, *argv);
 300                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, 1);
 301                 } else if (!matches(*argv, "noremcsumtx")) {
 302                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_TX,
 303                                      *argv, *argv);
 304                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, 0);
 305                 } else if (!matches(*argv, "remcsumrx")) {
 306                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_RX,
 307                                      *argv, *argv);
 308                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, 1);
 309                 } else if (!matches(*argv, "noremcsumrx")) {
 310                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_RX,
 311                                      *argv, *argv);
 312                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, 0);
 313                 } else if (!matches(*argv, "external")) {
 314                         check_duparg(&attrs, IFLA_VXLAN_COLLECT_METADATA,
 315                                      *argv, *argv);
 316                         metadata = 1;
 317                         learning = 0;
 318                         /* we will add LEARNING attribute outside of the loop */
 319                         addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA,
 320                                  metadata);
 321                 } else if (!matches(*argv, "noexternal")) {
 322                         check_duparg(&attrs, IFLA_VXLAN_COLLECT_METADATA,
 323                                      *argv, *argv);
 324                         metadata = 0;
 325                         addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA,
 326                                  metadata);
 327                 } else if (!matches(*argv, "gbp")) {
 328                         check_duparg(&attrs, IFLA_VXLAN_GBP, *argv, *argv);
 329                         addattr_l(n, 1024, IFLA_VXLAN_GBP, NULL, 0);
 330                 } else if (!matches(*argv, "gpe")) {
 331                         check_duparg(&attrs, IFLA_VXLAN_GPE, *argv, *argv);
 332                         addattr_l(n, 1024, IFLA_VXLAN_GPE, NULL, 0);
 333                 } else if (matches(*argv, "help") == 0) {
 334                         explain();
 335                         return -1;
 336                 } else {
 337                         fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv);
 338                         explain();
 339                         return -1;
 340                 }
 341                 argc--, argv++;
 342         }
 343
 344         if (metadata && VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID)) {
 345                 fprintf(stderr, "vxlan: both 'external' and vni cannot be specified\n");
 346                 return -1;
 347         }
 348
 349         if (!metadata && !VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID) && !set_op) {
 350                 fprintf(stderr, "vxlan: missing virtual network identifier\n");
 351                 return -1;
 352         }
 353
 354         if (is_addrtype_inet_multi(&daddr) &&
 355             !VXLAN_ATTRSET(attrs, IFLA_VXLAN_LINK)) {
 356                 fprintf(stderr, "vxlan: 'group' requires 'dev' to be specified\n");
 357                 return -1;
 358         }
 359
 360         if (!VXLAN_ATTRSET(attrs, IFLA_VXLAN_PORT) &&
 361             VXLAN_ATTRSET(attrs, IFLA_VXLAN_GPE)) {
 362                 dstport = 4790;
 363         } else if (!VXLAN_ATTRSET(attrs, IFLA_VXLAN_PORT) && !set_op) {
 364                 fprintf(stderr, "vxlan: destination port not specified\n"
 365                         "Will use Linux kernel default (non-standard value)\n");
 366                 fprintf(stderr,
 367                         "Use 'dstport 4789' to get the IANA assigned value\n"
 368                         "Use 'dstport 0' to get default and quiet this message\n");
 369         }
 370
 371         if (VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID))
 372                 addattr32(n, 1024, IFLA_VXLAN_ID, vni);
 373
 374         if (is_addrtype_inet(&saddr)) {
 375                 int type = (saddr.family == AF_INET) ? IFLA_VXLAN_LOCAL
 376                                                      : IFLA_VXLAN_LOCAL6;
 377                 addattr_l(n, 1024, type, saddr.data, saddr.bytelen);
 378                 selected_family = true;
 379         }
 380
 381         if (is_addrtype_inet(&daddr)) {
 382                 int type = (daddr.family == AF_INET) ? IFLA_VXLAN_GROUP
 383                                                      : IFLA_VXLAN_GROUP6;
 384                 addattr_l(n, 1024, type, daddr.data, daddr.bytelen);
 385                 selected_family = true;
 386         }
 387
 388         if (!selected_family) {
 389                 if (preferred_family == AF_INET) {
 390                         get_addr(&daddr, "default", AF_INET);
 391                         addattr_l(n, 1024, IFLA_VXLAN_GROUP,
 392                                   daddr.data, daddr.bytelen);
 393                 } else if (preferred_family == AF_INET6) {
 394                         get_addr(&daddr, "default", AF_INET6);
 395                         addattr_l(n, 1024, IFLA_VXLAN_GROUP6,
 396                                   daddr.data, daddr.bytelen);
 397                 }
 398         }
 399
 400         if (!set_op || VXLAN_ATTRSET(attrs, IFLA_VXLAN_LEARNING))
 401                 addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning);
 402
 403         if (dstport)
 404                 addattr16(n, 1024, IFLA_VXLAN_PORT, htons(dstport));
 405
 406         return 0;
 407 }
 408
 409 static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 410 {
 411         __u32 vni;
 412         __u8 ttl = 0;
 413         __u8 tos = 0;
 414         __u32 maxaddr;
 415
 416         if (!tb)
 417                 return;
 418
 419         if (tb[IFLA_VXLAN_COLLECT_METADATA] &&
 420             rta_getattr_u8(tb[IFLA_VXLAN_COLLECT_METADATA])) {
 421                 print_bool(PRINT_ANY, "external", "external", true);
 422                 return;
 423         }
 424
 425         if (!tb[IFLA_VXLAN_ID] ||
 426             RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32))
 427                 return;
 428
 429         vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]);
 430         print_uint(PRINT_ANY, "id", "id %u ", vni);
 431
 432         if (tb[IFLA_VXLAN_GROUP]) {
 433                 __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]);
 434
 435                 if (addr) {
 436                         if (IN_MULTICAST(ntohl(addr)))
 437                                 print_string(PRINT_ANY,
 438                                              "group",
 439                                              "group %s ",
 440                                              format_host(AF_INET, 4, &addr));
 441                         else
 442                                 print_string(PRINT_ANY,
 443                                              "remote",
 444                                              "remote %s ",
 445                                              format_host(AF_INET, 4, &addr));
 446                 }
 447         } else if (tb[IFLA_VXLAN_GROUP6]) {
 448                 struct in6_addr addr;
 449
 450                 memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_GROUP6]), sizeof(struct in6_addr));
 451                 if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) {
 452                         if (IN6_IS_ADDR_MULTICAST(&addr))
 453                                 print_string(PRINT_ANY,
 454                                              "group6",
 455                                              "group %s ",
 456                                              format_host(AF_INET6,
 457                                                          sizeof(struct in6_addr),
 458                                                          &addr));
 459                         else
 460                                 print_string(PRINT_ANY,
 461                                              "remote6",
 462                                              "remote %s ",
 463                                              format_host(AF_INET6,
 464                                                          sizeof(struct in6_addr),
 465                                                          &addr));
 466                 }
 467         }
 468
 469         if (tb[IFLA_VXLAN_LOCAL]) {
 470                 __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]);
 471
 472                 if (addr)
 473                         print_string(PRINT_ANY,
 474                                      "local",
 475                                      "local %s ",
 476                                      format_host(AF_INET, 4, &addr));
 477         } else if (tb[IFLA_VXLAN_LOCAL6]) {
 478                 struct in6_addr addr;
 479
 480                 memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr));
 481                 if (!IN6_IS_ADDR_UNSPECIFIED(&addr))
 482                         print_string(PRINT_ANY,
 483                                      "local6",
 484                                      "local %s ",
 485                                      format_host(AF_INET6,
 486                                                  sizeof(struct in6_addr),
 487                                                  &addr));
 488         }
 489
 490         if (tb[IFLA_VXLAN_LINK]) {
 491                 unsigned int link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]);
 492
 493                 if (link) {
 494                         print_string(PRINT_ANY, "link", "dev %s ",
 495                                      ll_index_to_name(link));
 496                 }
 497         }
 498
 499         if (tb[IFLA_VXLAN_PORT_RANGE]) {
 500                 const struct ifla_vxlan_port_range *r
 501                         = RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]);
 502                 if (is_json_context()) {
 503                         open_json_object("port_range");
 504                         print_uint(PRINT_JSON, "low", NULL, ntohs(r->low));
 505                         print_uint(PRINT_JSON, "high", NULL, ntohs(r->high));
 506                         close_json_object();
 507                 } else {
 508                         fprintf(f, "srcport %u %u ",
 509                                 ntohs(r->low), ntohs(r->high));
 510                 }
 511         }
 512
 513         if (tb[IFLA_VXLAN_PORT])
 514                 print_uint(PRINT_ANY,
 515                            "port",
 516                            "dstport %u ",
 517                            rta_getattr_be16(tb[IFLA_VXLAN_PORT]));
 518
 519         if (tb[IFLA_VXLAN_LEARNING]) {
 520                 __u8 learning = rta_getattr_u8(tb[IFLA_VXLAN_LEARNING]);
 521
 522                 print_bool(PRINT_JSON, "learning", NULL, learning);
 523                 if (!learning)
 524                         print_bool(PRINT_FP, NULL, "nolearning ", true);
 525         }
 526
 527         if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY]))
 528                 print_bool(PRINT_ANY, "proxy", "proxy ", true);
 529
 530         if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC]))
 531                 print_bool(PRINT_ANY, "rsc", "rsc ", true);
 532
 533         if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS]))
 534                 print_bool(PRINT_ANY, "l2miss", "l2miss ", true);
 535
 536         if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS]))
 537                 print_bool(PRINT_ANY, "l3miss", "l3miss ", true);
 538
 539         if (tb[IFLA_VXLAN_TOS])
 540                 tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]);
 541         if (tos) {
 542                 if (is_json_context() || tos != 1)
 543                         print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos);
 544                 else
 545                         print_string(PRINT_FP, NULL, "tos %s ", "inherit");
 546         }
 547
 548         if (tb[IFLA_VXLAN_TTL_INHERIT] &&
 549             rta_getattr_u8(tb[IFLA_VXLAN_TTL_INHERIT])) {
 550                 print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
 551         } else if (tb[IFLA_VXLAN_TTL]) {
 552                 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]);
 553                 if (is_json_context() || ttl)
 554                         print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
 555                 else
 556                         print_string(PRINT_FP, NULL, "ttl %s ", "auto");
 557         }
 558
 559         if (tb[IFLA_VXLAN_DF]) {
 560                 enum ifla_vxlan_df df = rta_getattr_u8(tb[IFLA_VXLAN_DF]);
 561
 562                 if (df == VXLAN_DF_UNSET)
 563                         print_string(PRINT_JSON, "df", "df %s ", "unset");
 564                 else if (df == VXLAN_DF_SET)
 565                         print_string(PRINT_ANY, "df", "df %s ", "set");
 566                 else if (df == VXLAN_DF_INHERIT)
 567                         print_string(PRINT_ANY, "df", "df %s ", "inherit");
 568         }
 569
 570         if (tb[IFLA_VXLAN_LABEL]) {
 571                 __u32 label = rta_getattr_u32(tb[IFLA_VXLAN_LABEL]);
 572
 573                 if (label)
 574                         print_0xhex(PRINT_ANY, "label",
 575                                     "flowlabel %#llx ", ntohl(label));
 576         }
 577
 578         if (tb[IFLA_VXLAN_AGEING]) {
 579                 __u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]);
 580
 581                 if (age == 0)
 582                         print_uint(PRINT_ANY, "ageing", "ageing none ", 0);
 583                 else
 584                         print_uint(PRINT_ANY, "ageing", "ageing %u ", age);
 585         }
 586
 587         if (tb[IFLA_VXLAN_LIMIT] &&
 588             ((maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT])) != 0))
 589                 print_uint(PRINT_ANY, "limit", "maxaddr %u ", maxaddr);
 590
 591         if (tb[IFLA_VXLAN_UDP_CSUM]) {
 592                 __u8 udp_csum = rta_getattr_u8(tb[IFLA_VXLAN_UDP_CSUM]);
 593
 594                 if (is_json_context()) {
 595                         print_bool(PRINT_ANY, "udp_csum", NULL, udp_csum);
 596                 } else {
 597                         if (!udp_csum)
 598                                 fputs("no", f);
 599                         fputs("udpcsum ", f);
 600                 }
 601         }
 602
 603         if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {
 604                 __u8 csum6 = rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]);
 605
 606                 if (is_json_context()) {
 607                         print_bool(PRINT_ANY,
 608                                    "udp_zero_csum6_tx", NULL, csum6);
 609                 } else {
 610                         if (!csum6)
 611                                 fputs("no", f);
 612                         fputs("udp6zerocsumtx ", f);
 613                 }
 614         }
 615
 616         if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {
 617                 __u8 csum6 = rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]);
 618
 619                 if (is_json_context()) {
 620                         print_bool(PRINT_ANY,
 621                                    "udp_zero_csum6_rx",
 622                                    NULL,
 623                                    csum6);
 624                 } else {
 625                         if (!csum6)
 626                                 fputs("no", f);
 627                         fputs("udp6zerocsumrx ", f);
 628                 }
 629         }
 630
 631         if (tb[IFLA_VXLAN_REMCSUM_TX] &&
 632             rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_TX]))
 633                 print_bool(PRINT_ANY, "remcsum_tx", "remcsumtx ", true);
 634
 635         if (tb[IFLA_VXLAN_REMCSUM_RX] &&
 636             rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_RX]))
 637                 print_bool(PRINT_ANY, "remcsum_rx", "remcsumrx ", true);
 638
 639         if (tb[IFLA_VXLAN_GBP])
 640                 print_bool(PRINT_ANY, "gbp", "gbp ", true);
 641         if (tb[IFLA_VXLAN_GPE])
 642                 print_bool(PRINT_ANY, "gpe", "gpe ", true);
 643 }
 644
 645 static void vxlan_print_help(struct link_util *lu, int argc, char **argv,
 646                              FILE *f)
 647 {
 648         print_explain(f);
 649 }
 650
 651 struct link_util vxlan_link_util = {
 652         .id             = "vxlan",
 653         .maxattr        = IFLA_VXLAN_MAX,
 654         .parse_opt      = vxlan_parse_opt,
 655         .print_opt      = vxlan_print_opt,
 656         .print_help     = vxlan_print_help,
 657 };