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