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