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