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         __u32 vni = 0;
  78         __u32 gaddr = 0;
  79         __u32 daddr = 0;
  80         struct in6_addr gaddr6 = IN6ADDR_ANY_INIT;
  81         struct in6_addr daddr6 = IN6ADDR_ANY_INIT;
  82         __u8 learning = 1;
  83         __u16 dstport = 0;
  84         __u8 metadata = 0;
  85         __u64 attrs = 0;
  86         bool set_op = (n->nlmsg_type == RTM_NEWLINK &&
  87                        !(n->nlmsg_flags & NLM_F_CREATE));
  88
  89         while (argc > 0) {
  90                 if (!matches(*argv, "id") ||
  91                     !matches(*argv, "vni")) {
  92                         /* We will add ID attribute outside of the loop since we
  93                          * need to consider metadata information as well.
  94                          */
  95                         NEXT_ARG();
  96                         check_duparg(&attrs, IFLA_VXLAN_ID, "id", *argv);
  97                         if (get_u32(&vni, *argv, 0) ||
  98                             vni >= 1u << 24)
  99                                 invarg("invalid id", *argv);
 100                 } else if (!matches(*argv, "group")) {
 101                         if (daddr || !IN6_IS_ADDR_UNSPECIFIED(&daddr6)) {
 102                                 fprintf(stderr, "vxlan: both group and remote");
 103                                 fprintf(stderr, " cannot be specified\n");
 104                                 return -1;
 105                         }
 106                         NEXT_ARG();
 107                         check_duparg(&attrs, IFLA_VXLAN_GROUP, "group", *argv);
 108                         if (!inet_get_addr(*argv, &gaddr, &gaddr6)) {
 109                                 fprintf(stderr, "Invalid address \"%s\"\n", *argv);
 110                                 return -1;
 111                         }
 112                         if (!IN6_IS_ADDR_MULTICAST(&gaddr6) && !IN_MULTICAST(ntohl(gaddr)))
 113                                 invarg("invalid group address", *argv);
 114                 } else if (!matches(*argv, "remote")) {
 115                         if (gaddr || !IN6_IS_ADDR_UNSPECIFIED(&gaddr6)) {
 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                         if (!inet_get_addr(*argv, &daddr, &daddr6)) {
 123                                 fprintf(stderr, "Invalid address \"%s\"\n", *argv);
 124                                 return -1;
 125                         }
 126                         if (IN6_IS_ADDR_MULTICAST(&daddr6) || IN_MULTICAST(ntohl(daddr)))
 127                                 invarg("invalid remote address", *argv);
 128                 } else if (!matches(*argv, "local")) {
 129                         __u32 saddr = 0;
 130                         struct in6_addr saddr6 = IN6ADDR_ANY_INIT;
 131
 132                         NEXT_ARG();
 133                         check_duparg(&attrs, IFLA_VXLAN_LOCAL, "local", *argv);
 134                         if (strcmp(*argv, "any")) {
 135                                 if (!inet_get_addr(*argv, &saddr, &saddr6)) {
 136                                         fprintf(stderr, "Invalid address \"%s\"\n", *argv);
 137                                         return -1;
 138                                 }
 139                         }
 140
 141                         if (IN_MULTICAST(ntohl(saddr)) || IN6_IS_ADDR_MULTICAST(&saddr6))
 142                                 invarg("invalid local address", *argv);
 143
 144                         if (saddr)
 145                                 addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4);
 146                         else if (!IN6_IS_ADDR_UNSPECIFIED(&saddr6))
 147                                 addattr_l(n, 1024, IFLA_VXLAN_LOCAL6, &saddr6,
 148                                           sizeof(struct in6_addr));
 149                 } else if (!matches(*argv, "dev")) {
 150                         unsigned int link;
 151
 152                         NEXT_ARG();
 153                         check_duparg(&attrs, IFLA_VXLAN_LINK, "dev", *argv);
 154                         link = if_nametoindex(*argv);
 155                         if (link == 0) {
 156                                 fprintf(stderr, "Cannot find device \"%s\"\n",
 157                                         *argv);
 158                                 exit(-1);
 159                         }
 160                         addattr32(n, 1024, IFLA_VXLAN_LINK, link);
 161                 } else if (!matches(*argv, "ttl") ||
 162                            !matches(*argv, "hoplimit")) {
 163                         unsigned int uval;
 164                         __u8 ttl = 0;
 165
 166                         NEXT_ARG();
 167                         check_duparg(&attrs, IFLA_VXLAN_TTL, "ttl", *argv);
 168                         if (strcmp(*argv, "inherit") != 0) {
 169                                 if (get_unsigned(&uval, *argv, 0))
 170                                         invarg("invalid TTL", *argv);
 171                                 if (uval > 255)
 172                                         invarg("TTL must be <= 255", *argv);
 173                                 ttl = uval;
 174                         }
 175                         addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);
 176                 } else if (!matches(*argv, "tos") ||
 177                            !matches(*argv, "dsfield")) {
 178                         __u32 uval;
 179                         __u8 tos;
 180
 181                         NEXT_ARG();
 182                         check_duparg(&attrs, IFLA_VXLAN_TOS, "tos", *argv);
 183                         if (strcmp(*argv, "inherit") != 0) {
 184                                 if (rtnl_dsfield_a2n(&uval, *argv))
 185                                         invarg("bad TOS value", *argv);
 186                                 tos = uval;
 187                         } else
 188                                 tos = 1;
 189                         addattr8(n, 1024, IFLA_VXLAN_TOS, tos);
 190                 } else if (!matches(*argv, "label") ||
 191                            !matches(*argv, "flowlabel")) {
 192                         __u32 uval;
 193
 194                         NEXT_ARG();
 195                         check_duparg(&attrs, IFLA_VXLAN_LABEL, "flowlabel",
 196                                      *argv);
 197                         if (get_u32(&uval, *argv, 0) ||
 198                             (uval & ~LABEL_MAX_MASK))
 199                                 invarg("invalid flowlabel", *argv);
 200                         addattr32(n, 1024, IFLA_VXLAN_LABEL, htonl(uval));
 201                 } else if (!matches(*argv, "ageing")) {
 202                         __u32 age;
 203
 204                         NEXT_ARG();
 205                         check_duparg(&attrs, IFLA_VXLAN_AGEING, "ageing",
 206                                      *argv);
 207                         if (strcmp(*argv, "none") == 0)
 208                                 age = 0;
 209                         else if (get_u32(&age, *argv, 0))
 210                                 invarg("ageing timer", *argv);
 211                         addattr32(n, 1024, IFLA_VXLAN_AGEING, age);
 212                 } else if (!matches(*argv, "maxaddress")) {
 213                         __u32 maxaddr;
 214
 215                         NEXT_ARG();
 216                         check_duparg(&attrs, IFLA_VXLAN_LIMIT,
 217                                      "maxaddress", *argv);
 218                         if (strcmp(*argv, "unlimited") == 0)
 219                                 maxaddr = 0;
 220                         else if (get_u32(&maxaddr, *argv, 0))
 221                                 invarg("max addresses", *argv);
 222                         addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr);
 223                 } else if (!matches(*argv, "port") ||
 224                            !matches(*argv, "srcport")) {
 225                         struct ifla_vxlan_port_range range = { 0, 0 };
 226
 227                         NEXT_ARG();
 228                         check_duparg(&attrs, IFLA_VXLAN_PORT_RANGE, "srcport",
 229                                      *argv);
 230                         if (get_be16(&range.low, *argv, 0))
 231                                 invarg("min port", *argv);
 232                         NEXT_ARG();
 233                         if (get_be16(&range.high, *argv, 0))
 234                                 invarg("max port", *argv);
 235                         if (range.low || range.high) {
 236                                 addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE,
 237                                           &range, sizeof(range));
 238                         }
 239                 } else if (!matches(*argv, "dstport")) {
 240                         NEXT_ARG();
 241                         check_duparg(&attrs, IFLA_VXLAN_PORT, "dstport", *argv);
 242                         if (get_u16(&dstport, *argv, 0))
 243                                 invarg("dst port", *argv);
 244                 } else if (!matches(*argv, "nolearning")) {
 245                         check_duparg(&attrs, IFLA_VXLAN_LEARNING, *argv, *argv);
 246                         learning = 0;
 247                 } else if (!matches(*argv, "learning")) {
 248                         check_duparg(&attrs, IFLA_VXLAN_LEARNING, *argv, *argv);
 249                         learning = 1;
 250                 } else if (!matches(*argv, "noproxy")) {
 251                         check_duparg(&attrs, IFLA_VXLAN_PROXY, *argv, *argv);
 252                         addattr8(n, 1024, IFLA_VXLAN_PROXY, 0);
 253                 } else if (!matches(*argv, "proxy")) {
 254                         check_duparg(&attrs, IFLA_VXLAN_PROXY, *argv, *argv);
 255                         addattr8(n, 1024, IFLA_VXLAN_PROXY, 1);
 256                 } else if (!matches(*argv, "norsc")) {
 257                         check_duparg(&attrs, IFLA_VXLAN_RSC, *argv, *argv);
 258                         addattr8(n, 1024, IFLA_VXLAN_RSC, 0);
 259                 } else if (!matches(*argv, "rsc")) {
 260                         check_duparg(&attrs, IFLA_VXLAN_RSC, *argv, *argv);
 261                         addattr8(n, 1024, IFLA_VXLAN_RSC, 1);
 262                 } else if (!matches(*argv, "nol2miss")) {
 263                         check_duparg(&attrs, IFLA_VXLAN_L2MISS, *argv, *argv);
 264                         addattr8(n, 1024, IFLA_VXLAN_L2MISS, 0);
 265                 } else if (!matches(*argv, "l2miss")) {
 266                         check_duparg(&attrs, IFLA_VXLAN_L2MISS, *argv, *argv);
 267                         addattr8(n, 1024, IFLA_VXLAN_L2MISS, 1);
 268                 } else if (!matches(*argv, "nol3miss")) {
 269                         check_duparg(&attrs, IFLA_VXLAN_L3MISS, *argv, *argv);
 270                         addattr8(n, 1024, IFLA_VXLAN_L3MISS, 0);
 271                 } else if (!matches(*argv, "l3miss")) {
 272                         check_duparg(&attrs, IFLA_VXLAN_L3MISS, *argv, *argv);
 273                         addattr8(n, 1024, IFLA_VXLAN_L3MISS, 1);
 274                 } else if (!matches(*argv, "udpcsum")) {
 275                         check_duparg(&attrs, IFLA_VXLAN_UDP_CSUM, *argv, *argv);
 276                         addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, 1);
 277                 } else if (!matches(*argv, "noudpcsum")) {
 278                         check_duparg(&attrs, IFLA_VXLAN_UDP_CSUM, *argv, *argv);
 279                         addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, 0);
 280                 } else if (!matches(*argv, "udp6zerocsumtx")) {
 281                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
 282                                      *argv, *argv);
 283                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, 1);
 284                 } else if (!matches(*argv, "noudp6zerocsumtx")) {
 285                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
 286                                      *argv, *argv);
 287                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, 0);
 288                 } else if (!matches(*argv, "udp6zerocsumrx")) {
 289                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
 290                                      *argv, *argv);
 291                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, 1);
 292                 } else if (!matches(*argv, "noudp6zerocsumrx")) {
 293                         check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
 294                                      *argv, *argv);
 295                         addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, 0);
 296                 } else if (!matches(*argv, "remcsumtx")) {
 297                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_TX,
 298                                      *argv, *argv);
 299                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, 1);
 300                 } else if (!matches(*argv, "noremcsumtx")) {
 301                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_TX,
 302                                      *argv, *argv);
 303                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, 0);
 304                 } else if (!matches(*argv, "remcsumrx")) {
 305                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_RX,
 306                                      *argv, *argv);
 307                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, 1);
 308                 } else if (!matches(*argv, "noremcsumrx")) {
 309                         check_duparg(&attrs, IFLA_VXLAN_REMCSUM_RX,
 310                                      *argv, *argv);
 311                         addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, 0);
 312                 } else if (!matches(*argv, "external")) {
 313                         check_duparg(&attrs, IFLA_VXLAN_COLLECT_METADATA,
 314                                      *argv, *argv);
 315                         metadata = 1;
 316                         learning = 0;
 317                         /* we will add LEARNING attribute outside of the loop */
 318                         addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA,
 319                                  metadata);
 320                 } else if (!matches(*argv, "noexternal")) {
 321                         check_duparg(&attrs, IFLA_VXLAN_COLLECT_METADATA,
 322                                      *argv, *argv);
 323                         metadata = 0;
 324                         addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA,
 325                                  metadata);
 326                 } else if (!matches(*argv, "gbp")) {
 327                         check_duparg(&attrs, IFLA_VXLAN_GBP, *argv, *argv);
 328                         addattr_l(n, 1024, IFLA_VXLAN_GBP, NULL, 0);
 329                 } else if (!matches(*argv, "gpe")) {
 330                         check_duparg(&attrs, IFLA_VXLAN_GPE, *argv, *argv);
 331                         addattr_l(n, 1024, IFLA_VXLAN_GPE, NULL, 0);
 332                 } else if (matches(*argv, "help") == 0) {
 333                         explain();
 334                         return -1;
 335                 } else {
 336                         fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv);
 337                         explain();
 338                         return -1;
 339                 }
 340                 argc--, argv++;
 341         }
 342
 343         if (metadata && VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID)) {
 344                 fprintf(stderr, "vxlan: both 'external' and vni cannot be specified\n");
 345                 return -1;
 346         }
 347
 348         if (!metadata && !VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID) && !set_op) {
 349                 fprintf(stderr, "vxlan: missing virtual network identifier\n");
 350                 return -1;
 351         }
 352
 353         if ((gaddr || !IN6_IS_ADDR_UNSPECIFIED(&gaddr6)) &&
 354             !VXLAN_ATTRSET(attrs, IFLA_VXLAN_LINK)) {
 355                 fprintf(stderr, "vxlan: 'group' requires 'dev' to be specified\n");
 356                 return -1;
 357         }
 358
 359         if (!VXLAN_ATTRSET(attrs, IFLA_VXLAN_PORT) &&
 360             VXLAN_ATTRSET(attrs, IFLA_VXLAN_GPE)) {
 361                 dstport = 4790;
 362         } else if (!VXLAN_ATTRSET(attrs, IFLA_VXLAN_PORT) && !set_op) {
 363                 fprintf(stderr, "vxlan: destination port not specified\n"
 364                         "Will use Linux kernel default (non-standard value)\n");
 365                 fprintf(stderr,
 366                         "Use 'dstport 4789' to get the IANA assigned value\n"
 367                         "Use 'dstport 0' to get default and quiet this message\n");
 368         }
 369
 370         if (VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID))
 371                 addattr32(n, 1024, IFLA_VXLAN_ID, vni);
 372         if (gaddr)
 373                 addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4);
 374         else if (daddr)
 375                 addattr_l(n, 1024, IFLA_VXLAN_GROUP, &daddr, 4);
 376         else if (!IN6_IS_ADDR_UNSPECIFIED(&gaddr6))
 377                 addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &gaddr6, sizeof(struct in6_addr));
 378         else if (!IN6_IS_ADDR_UNSPECIFIED(&daddr6))
 379                 addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &daddr6, sizeof(struct in6_addr));
 380         else if (preferred_family == AF_INET)
 381                 addattr_l(n, 1024, IFLA_VXLAN_GROUP, &daddr, 4);
 382         else if (preferred_family == AF_INET6)
 383                 addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &daddr6, sizeof(struct in6_addr));
 384
 385         if (!set_op || VXLAN_ATTRSET(attrs, IFLA_VXLAN_LEARNING))
 386                 addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning);
 387
 388         if (dstport)
 389                 addattr16(n, 1024, IFLA_VXLAN_PORT, htons(dstport));
 390
 391         return 0;
 392 }
 393
 394 static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 395 {
 396         __u32 vni;
 397         unsigned int link;
 398         __u8 tos;
 399         __u32 maxaddr;
 400         char s2[64];
 401
 402         if (!tb)
 403                 return;
 404
 405         if (!tb[IFLA_VXLAN_ID] ||
 406             RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32))
 407                 return;
 408
 409         vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]);
 410         print_uint(PRINT_ANY, "id", "id %u ", vni);
 411
 412         if (tb[IFLA_VXLAN_GROUP]) {
 413                 __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]);
 414
 415                 if (addr) {
 416                         if (IN_MULTICAST(ntohl(addr)))
 417                                 print_string(PRINT_ANY,
 418                                              "group",
 419                                              "group %s ",
 420                                              format_host(AF_INET, 4, &addr));
 421                         else
 422                                 print_string(PRINT_ANY,
 423                                              "remote",
 424                                              "remote %s ",
 425                                              format_host(AF_INET, 4, &addr));
 426                 }
 427         } else if (tb[IFLA_VXLAN_GROUP6]) {
 428                 struct in6_addr addr;
 429
 430                 memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_GROUP6]), sizeof(struct in6_addr));
 431                 if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) {
 432                         if (IN6_IS_ADDR_MULTICAST(&addr))
 433                                 print_string(PRINT_ANY,
 434                                              "group6",
 435                                              "group %s ",
 436                                              format_host(AF_INET6,
 437                                                          sizeof(struct in6_addr),
 438                                                          &addr));
 439                         else
 440                                 print_string(PRINT_ANY,
 441                                              "remote6",
 442                                              "remote %s ",
 443                                              format_host(AF_INET6,
 444                                                          sizeof(struct in6_addr),
 445                                                          &addr));
 446                 }
 447         }
 448
 449         if (tb[IFLA_VXLAN_LOCAL]) {
 450                 __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]);
 451
 452                 if (addr)
 453                         print_string(PRINT_ANY,
 454                                      "local",
 455                                      "local %s ",
 456                                      format_host(AF_INET, 4, &addr));
 457         } else if (tb[IFLA_VXLAN_LOCAL6]) {
 458                 struct in6_addr addr;
 459
 460                 memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr));
 461                 if (!IN6_IS_ADDR_UNSPECIFIED(&addr))
 462                         print_string(PRINT_ANY,
 463                                      "local6",
 464                                      "local %s ",
 465                                      format_host(AF_INET6,
 466                                                  sizeof(struct in6_addr),
 467                                                  &addr));
 468         }
 469
 470         if (tb[IFLA_VXLAN_LINK] &&
 471             (link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) {
 472                 const char *n = if_indextoname(link, s2);
 473
 474                 if (n)
 475                         print_string(PRINT_ANY, "link", "dev %s ", n);
 476                 else
 477                         print_uint(PRINT_ANY, "link_index", "dev %u ", link);
 478         }
 479
 480         if (tb[IFLA_VXLAN_PORT_RANGE]) {
 481                 const struct ifla_vxlan_port_range *r
 482                         = RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]);
 483                 if (is_json_context()) {
 484                         open_json_object("port_range");
 485                         print_uint(PRINT_JSON, "low", NULL, ntohs(r->low));
 486                         print_uint(PRINT_JSON, "high", NULL, ntohs(r->high));
 487                         close_json_object();
 488                 } else {
 489                         fprintf(f, "srcport %u %u ",
 490                                 ntohs(r->low), ntohs(r->high));
 491                 }
 492         }
 493
 494         if (tb[IFLA_VXLAN_PORT])
 495                 print_uint(PRINT_ANY,
 496                            "port",
 497                            "dstport %u ",
 498                            rta_getattr_be16(tb[IFLA_VXLAN_PORT]));
 499
 500         if (tb[IFLA_VXLAN_LEARNING]) {
 501                 __u8 learning = rta_getattr_u8(tb[IFLA_VXLAN_LEARNING]);
 502
 503                 print_bool(PRINT_JSON, "learning", NULL, learning);
 504                 if (!learning)
 505                         print_bool(PRINT_FP, NULL, "nolearning ", true);
 506         }
 507
 508         if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY]))
 509                 print_bool(PRINT_ANY, "proxy", "proxy ", true);
 510
 511         if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC]))
 512                 print_bool(PRINT_ANY, "rsc", "rsc ", true);
 513
 514         if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS]))
 515                 print_bool(PRINT_ANY, "l2miss", "l2miss ", true);
 516
 517         if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS]))
 518                 print_bool(PRINT_ANY, "l3miss", "l3miss ", true);
 519
 520         if (tb[IFLA_VXLAN_TOS] &&
 521             (tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]))) {
 522                 if (is_json_context()) {
 523                         print_0xhex(PRINT_JSON, "tos", "%#x", tos);
 524                 } else {
 525                         if (tos == 1)
 526                                 fprintf(f, "tos %s ", "inherit");
 527                         else
 528                                 fprintf(f, "tos %#x ", tos);
 529                 }
 530         }
 531
 532         if (tb[IFLA_VXLAN_TTL]) {
 533                 __u8 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]);
 534
 535                 if (ttl)
 536                         print_int(PRINT_ANY, "ttl", "ttl %d ", ttl);
 537                 else
 538                         print_int(PRINT_JSON, "ttl", NULL, ttl);
 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_COLLECT_METADATA] &&
 613             rta_getattr_u8(tb[IFLA_VXLAN_COLLECT_METADATA]))
 614                 print_bool(PRINT_ANY, "collect_metadata", "external ", true);
 615
 616         if (tb[IFLA_VXLAN_GBP])
 617                 print_bool(PRINT_ANY, "gbp", "gbp ", true);
 618         if (tb[IFLA_VXLAN_GPE])
 619                 print_bool(PRINT_ANY, "gpe", "gpe ", true);
 620 }
 621
 622 static void vxlan_print_help(struct link_util *lu, int argc, char **argv,
 623                              FILE *f)
 624 {
 625         print_explain(f);
 626 }
 627
 628 struct link_util vxlan_link_util = {
 629         .id             = "vxlan",
 630         .maxattr        = IFLA_VXLAN_MAX,
 631         .parse_opt      = vxlan_parse_opt,
 632         .print_opt      = vxlan_print_opt,
 633         .print_help     = vxlan_print_help,
 634 };