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