ip/link_gre6.c

   1 /*
   2  * link_gre6.c  gre driver module
   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:     Dmitry Kozlov <xeb@mail.ru>
  10  *
  11  */
  12
  13 #include <string.h>
  14 #include <net/if.h>
  15 #include <sys/types.h>
  16 #include <sys/socket.h>
  17 #include <arpa/inet.h>
  18
  19 #include <linux/ip.h>
  20 #include <linux/if_tunnel.h>
  21 #include <linux/ip6_tunnel.h>
  22
  23 #include "rt_names.h"
  24 #include "utils.h"
  25 #include "ip_common.h"
  26 #include "tunnel.h"
  27
  28 #define IP6_FLOWINFO_TCLASS     htonl(0x0FF00000)
  29 #define IP6_FLOWINFO_FLOWLABEL  htonl(0x000FFFFF)
  30
  31 #define DEFAULT_TNL_HOP_LIMIT   (64)
  32
  33 static void gre_print_help(struct link_util *lu, int argc, char **argv, FILE *f)
  34 {
  35         fprintf(f,
  36                 "Usage: ... %-9s [ remote ADDR ]\n",
  37                 lu->id
  38         );
  39         fprintf(f,
  40                 "                     [ local ADDR ]\n"
  41                 "                     [ [i|o]seq ]\n"
  42                 "                     [ [i|o]key KEY ]\n"
  43                 "                     [ [i|o]csum ]\n"
  44                 "                     [ hoplimit TTL ]\n"
  45                 "                     [ encaplimit ELIM ]\n"
  46                 "                     [ tclass TCLASS ]\n"
  47                 "                     [ flowlabel FLOWLABEL ]\n"
  48                 "                     [ dscp inherit ]\n"
  49                 "                     [ dev PHYS_DEV ]\n"
  50                 "                     [ fwmark MARK ]\n"
  51                 "                     [ [no]allow-localremote ]\n"
  52                 "                     [ external ]\n"
  53                 "                     [ noencap ]\n"
  54                 "                     [ encap { fou | gue | none } ]\n"
  55                 "                     [ encap-sport PORT ]\n"
  56                 "                     [ encap-dport PORT ]\n"
  57                 "                     [ [no]encap-csum ]\n"
  58                 "                     [ [no]encap-csum6 ]\n"
  59                 "                     [ [no]encap-remcsum ]\n"
  60                 "                     [ erspan_ver version ]\n"
  61                 "                     [ erspan IDX ]\n"
  62                 "                     [ erspan_dir { ingress | egress } ]\n"
  63                 "                     [ erspan_hwid hwid ]\n"
  64                 "\n"
  65         );
  66         fprintf(f,
  67                 "Where: ADDR      := IPV6_ADDRESS\n"
  68                 "       TTL       := { 0..255 } (default=%d)\n"
  69                 "       KEY       := { DOTTED_QUAD | NUMBER }\n"
  70                 "       ELIM      := { none | 0..255 }(default=%d)\n"
  71                 "       TCLASS    := { 0x0..0xff | inherit }\n"
  72                 "       FLOWLABEL := { 0x0..0xfffff | inherit }\n"
  73                 "       MARK      := { 0x0..0xffffffff | inherit }\n",
  74                 DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
  75         );
  76 }
  77
  78 static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
  79                          struct nlmsghdr *n)
  80 {
  81         struct ifinfomsg *ifi = NLMSG_DATA(n);
  82         struct {
  83                 struct nlmsghdr n;
  84                 struct ifinfomsg i;
  85         } req = {
  86                 .n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
  87                 .n.nlmsg_flags = NLM_F_REQUEST,
  88                 .n.nlmsg_type = RTM_GETLINK,
  89                 .i.ifi_family = preferred_family,
  90                 .i.ifi_index = ifi->ifi_index,
  91         };
  92         struct nlmsghdr *answer;
  93         struct rtattr *tb[IFLA_MAX + 1];
  94         struct rtattr *linkinfo[IFLA_INFO_MAX+1];
  95         struct rtattr *greinfo[IFLA_GRE_MAX + 1];
  96         int len;
  97         __u16 iflags = 0;
  98         __u16 oflags = 0;
  99         __be32 ikey = 0;
 100         __be32 okey = 0;
 101         inet_prefix saddr, daddr;
 102         __u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
 103         __u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
 104         __u32 flowinfo = 0;
 105         __u32 flags = 0;
 106         __u32 link = 0;
 107         __u16 encaptype = 0;
 108         __u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
 109         __u16 encapsport = 0;
 110         __u16 encapdport = 0;
 111         __u8 metadata = 0;
 112         __u32 fwmark = 0;
 113         __u32 erspan_idx = 0;
 114         __u8 erspan_ver = 0;
 115         __u8 erspan_dir = 0;
 116         __u16 erspan_hwid = 0;
 117
 118         inet_prefix_reset(&saddr);
 119         inet_prefix_reset(&daddr);
 120
 121         if (!(n->nlmsg_flags & NLM_F_CREATE)) {
 122                 const struct rtattr *rta;
 123
 124                 if (rtnl_talk(&rth, &req.n, &answer) < 0) {
 125 get_failed:
 126                         fprintf(stderr,
 127                                 "Failed to get existing tunnel info.\n");
 128                         return -1;
 129                 }
 130
 131                 len = answer->nlmsg_len;
 132                 len -= NLMSG_LENGTH(sizeof(*ifi));
 133                 if (len < 0)
 134                         goto get_failed;
 135
 136                 parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
 137
 138                 if (!tb[IFLA_LINKINFO])
 139                         goto get_failed;
 140
 141                 parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
 142
 143                 if (!linkinfo[IFLA_INFO_DATA])
 144                         goto get_failed;
 145
 146                 parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
 147                                     linkinfo[IFLA_INFO_DATA]);
 148
 149                 rta = greinfo[IFLA_GRE_LOCAL];
 150                 if (rta && get_addr_rta(&saddr, rta, AF_INET6))
 151                         goto get_failed;
 152
 153                 rta = greinfo[IFLA_GRE_REMOTE];
 154                 if (rta && get_addr_rta(&daddr, rta, AF_INET6))
 155                         goto get_failed;
 156
 157                 if (greinfo[IFLA_GRE_IKEY])
 158                         ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
 159
 160                 if (greinfo[IFLA_GRE_OKEY])
 161                         okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
 162
 163                 if (greinfo[IFLA_GRE_IFLAGS])
 164                         iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
 165
 166                 if (greinfo[IFLA_GRE_OFLAGS])
 167                         oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
 168
 169                 if (greinfo[IFLA_GRE_TTL])
 170                         hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
 171
 172                 if (greinfo[IFLA_GRE_LINK])
 173                         link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
 174
 175                 if (greinfo[IFLA_GRE_ENCAP_LIMIT])
 176                         encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);
 177
 178                 if (greinfo[IFLA_GRE_FLOWINFO])
 179                         flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);
 180
 181                 if (greinfo[IFLA_GRE_FLAGS])
 182                         flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);
 183
 184                 if (greinfo[IFLA_GRE_ENCAP_TYPE])
 185                         encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
 186
 187                 if (greinfo[IFLA_GRE_ENCAP_FLAGS])
 188                         encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
 189
 190                 if (greinfo[IFLA_GRE_ENCAP_SPORT])
 191                         encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
 192
 193                 if (greinfo[IFLA_GRE_ENCAP_DPORT])
 194                         encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
 195
 196                 if (greinfo[IFLA_GRE_COLLECT_METADATA])
 197                         metadata = 1;
 198
 199                 if (greinfo[IFLA_GRE_FWMARK])
 200                         fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
 201
 202                 if (greinfo[IFLA_GRE_ERSPAN_INDEX])
 203                         erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
 204
 205                 if (greinfo[IFLA_GRE_ERSPAN_VER])
 206                         erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);
 207
 208                 if (greinfo[IFLA_GRE_ERSPAN_DIR])
 209                         erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);
 210
 211                 if (greinfo[IFLA_GRE_ERSPAN_HWID])
 212                         erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);
 213
 214                 free(answer);
 215         }
 216
 217         while (argc > 0) {
 218                 if (!matches(*argv, "key")) {
 219                         NEXT_ARG();
 220                         iflags |= GRE_KEY;
 221                         oflags |= GRE_KEY;
 222                         ikey = okey = tnl_parse_key("key", *argv);
 223                 } else if (!matches(*argv, "ikey")) {
 224                         NEXT_ARG();
 225                         iflags |= GRE_KEY;
 226                         ikey = tnl_parse_key("ikey", *argv);
 227                 } else if (!matches(*argv, "okey")) {
 228                         NEXT_ARG();
 229                         oflags |= GRE_KEY;
 230                         okey = tnl_parse_key("okey", *argv);
 231                 } else if (!matches(*argv, "seq")) {
 232                         iflags |= GRE_SEQ;
 233                         oflags |= GRE_SEQ;
 234                 } else if (!matches(*argv, "iseq")) {
 235                         iflags |= GRE_SEQ;
 236                 } else if (!matches(*argv, "oseq")) {
 237                         oflags |= GRE_SEQ;
 238                 } else if (!matches(*argv, "csum")) {
 239                         iflags |= GRE_CSUM;
 240                         oflags |= GRE_CSUM;
 241                 } else if (!matches(*argv, "icsum")) {
 242                         iflags |= GRE_CSUM;
 243                 } else if (!matches(*argv, "ocsum")) {
 244                         oflags |= GRE_CSUM;
 245                 } else if (!matches(*argv, "remote")) {
 246                         NEXT_ARG();
 247                         get_addr(&daddr, *argv, AF_INET6);
 248                 } else if (!matches(*argv, "local")) {
 249                         NEXT_ARG();
 250                         get_addr(&saddr, *argv, AF_INET6);
 251                 } else if (!matches(*argv, "dev")) {
 252                         NEXT_ARG();
 253                         link = ll_name_to_index(*argv);
 254                         if (link == 0) {
 255                                 fprintf(stderr, "Cannot find device \"%s\"\n",
 256                                         *argv);
 257                                 exit(-1);
 258                         }
 259                 } else if (!matches(*argv, "ttl") ||
 260                            !matches(*argv, "hoplimit") ||
 261                            !matches(*argv, "hlim")) {
 262                         NEXT_ARG();
 263                         if (strcmp(*argv, "inherit") != 0) {
 264                                 if (get_u8(&hop_limit, *argv, 0))
 265                                         invarg("invalid HLIM\n", *argv);
 266                         } else
 267                                 hop_limit = 0;
 268                 } else if (!matches(*argv, "tos") ||
 269                            !matches(*argv, "tclass") ||
 270                            !matches(*argv, "dsfield")) {
 271                         __u8 uval;
 272
 273                         NEXT_ARG();
 274                         flowinfo &= ~IP6_FLOWINFO_TCLASS;
 275                         if (strcmp(*argv, "inherit") == 0)
 276                                 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
 277                         else {
 278                                 if (get_u8(&uval, *argv, 16))
 279                                         invarg("invalid TClass", *argv);
 280                                 flowinfo |= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
 281                                 flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
 282                         }
 283                 } else if (strcmp(*argv, "flowlabel") == 0 ||
 284                            strcmp(*argv, "fl") == 0) {
 285                         __u32 uval;
 286
 287                         NEXT_ARG();
 288                         flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
 289                         if (strcmp(*argv, "inherit") == 0)
 290                                 flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL;
 291                         else {
 292                                 if (get_u32(&uval, *argv, 16))
 293                                         invarg("invalid Flowlabel", *argv);
 294                                 if (uval > 0xFFFFF)
 295                                         invarg("invalid Flowlabel", *argv);
 296                                 flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
 297                                 flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
 298                         }
 299                 } else if (strcmp(*argv, "dscp") == 0) {
 300                         NEXT_ARG();
 301                         if (strcmp(*argv, "inherit") != 0)
 302                                 invarg("not inherit", *argv);
 303                         flags |= IP6_TNL_F_RCV_DSCP_COPY;
 304                 } else if (strcmp(*argv, "noencap") == 0) {
 305                         encaptype = TUNNEL_ENCAP_NONE;
 306                 } else if (strcmp(*argv, "encap") == 0) {
 307                         NEXT_ARG();
 308                         if (strcmp(*argv, "fou") == 0)
 309                                 encaptype = TUNNEL_ENCAP_FOU;
 310                         else if (strcmp(*argv, "gue") == 0)
 311                                 encaptype = TUNNEL_ENCAP_GUE;
 312                         else if (strcmp(*argv, "none") == 0)
 313                                 encaptype = TUNNEL_ENCAP_NONE;
 314                         else
 315                                 invarg("Invalid encap type.", *argv);
 316                 } else if (strcmp(*argv, "encap-sport") == 0) {
 317                         NEXT_ARG();
 318                         if (strcmp(*argv, "auto") == 0)
 319                                 encapsport = 0;
 320                         else if (get_u16(&encapsport, *argv, 0))
 321                                 invarg("Invalid source port.", *argv);
 322                 } else if (strcmp(*argv, "encap-dport") == 0) {
 323                         NEXT_ARG();
 324                         if (get_u16(&encapdport, *argv, 0))
 325                                 invarg("Invalid destination port.", *argv);
 326                 } else if (strcmp(*argv, "encap-csum") == 0) {
 327                         encapflags |= TUNNEL_ENCAP_FLAG_CSUM;
 328                 } else if (strcmp(*argv, "noencap-csum") == 0) {
 329                         encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
 330                 } else if (strcmp(*argv, "encap-udp6-csum") == 0) {
 331                         encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
 332                 } else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
 333                         encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
 334                 } else if (strcmp(*argv, "encap-remcsum") == 0) {
 335                         encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
 336                 } else if (strcmp(*argv, "noencap-remcsum") == 0) {
 337                         encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
 338                 } else if (strcmp(*argv, "external") == 0) {
 339                         metadata = 1;
 340                 } else if (strcmp(*argv, "fwmark") == 0) {
 341                         NEXT_ARG();
 342                         if (strcmp(*argv, "inherit") == 0) {
 343                                 flags |= IP6_TNL_F_USE_ORIG_FWMARK;
 344                                 fwmark = 0;
 345                         } else {
 346                                 if (get_u32(&fwmark, *argv, 0))
 347                                         invarg("invalid fwmark\n", *argv);
 348                                 flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
 349                         }
 350                 } else if (strcmp(*argv, "allow-localremote") == 0) {
 351                         flags |= IP6_TNL_F_ALLOW_LOCAL_REMOTE;
 352                 } else if (strcmp(*argv, "noallow-localremote") == 0) {
 353                         flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE;
 354                 } else if (strcmp(*argv, "encaplimit") == 0) {
 355                         NEXT_ARG();
 356                         if (strcmp(*argv, "none") == 0) {
 357                                 flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
 358                         } else {
 359                                 __u8 uval;
 360
 361                                 if (get_u8(&uval, *argv, 0))
 362                                         invarg("invalid ELIM", *argv);
 363                                 encap_limit = uval;
 364                                 flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
 365                         }
 366                 } else if (strcmp(*argv, "erspan") == 0) {
 367                         NEXT_ARG();
 368                         if (get_u32(&erspan_idx, *argv, 0))
 369                                 invarg("invalid erspan index\n", *argv);
 370                         if (erspan_idx & ~((1<<20) - 1) || erspan_idx == 0)
 371                                 invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
 372                 } else if (strcmp(*argv, "erspan_ver") == 0) {
 373                         NEXT_ARG();
 374                         if (get_u8(&erspan_ver, *argv, 0))
 375                                 invarg("invalid erspan version\n", *argv);
 376                         if (erspan_ver != 1 && erspan_ver != 2)
 377                                 invarg("erspan version must be 1 or 2\n", *argv);
 378                 } else if (strcmp(*argv, "erspan_dir") == 0) {
 379                         NEXT_ARG();
 380                         if (matches(*argv, "ingress") == 0)
 381                                 erspan_dir = 0;
 382                         else if (matches(*argv, "egress") == 0)
 383                                 erspan_dir = 1;
 384                         else
 385                                 invarg("Invalid erspan direction.", *argv);
 386                 } else if (strcmp(*argv, "erspan_hwid") == 0) {
 387                         NEXT_ARG();
 388                         if (get_u16(&erspan_hwid, *argv, 0))
 389                                 invarg("invalid erspan hwid\n", *argv);
 390                 } else {
 391                         gre_print_help(lu, argc, argv, stderr);
 392                         return -1;
 393                 }
 394                 argc--; argv++;
 395         }
 396
 397         if (metadata) {
 398                 addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
 399                 return 0;
 400         }
 401
 402         addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
 403         addattr32(n, 1024, IFLA_GRE_OKEY, okey);
 404         addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
 405         addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
 406         if (is_addrtype_inet(&saddr))
 407                 addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
 408         if (is_addrtype_inet(&daddr))
 409                 addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
 410         if (link)
 411                 addattr32(n, 1024, IFLA_GRE_LINK, link);
 412         addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
 413         addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
 414         addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
 415         addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
 416         addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
 417         if (erspan_ver) {
 418                 addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
 419                 if (erspan_ver == 1 && erspan_idx != 0) {
 420                         addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
 421                 } else if (erspan_ver == 2) {
 422                         addattr8(n, 1024, IFLA_GRE_ERSPAN_DIR, erspan_dir);
 423                         addattr16(n, 1024, IFLA_GRE_ERSPAN_HWID, erspan_hwid);
 424                 }
 425         }
 426         addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
 427         addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
 428         addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
 429         addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
 430
 431         return 0;
 432 }
 433
 434 static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 435 {
 436         char s2[64];
 437         __u16 iflags = 0;
 438         __u16 oflags = 0;
 439         __u32 flags = 0;
 440         __u32 flowinfo = 0;
 441         __u8 ttl = 0;
 442
 443         if (!tb)
 444                 return;
 445
 446         if (tb[IFLA_GRE_COLLECT_METADATA]) {
 447                 print_bool(PRINT_ANY, "external", "external", true);
 448                 return;
 449         }
 450
 451         if (tb[IFLA_GRE_FLAGS])
 452                 flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);
 453
 454         if (tb[IFLA_GRE_FLOWINFO])
 455                 flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);
 456
 457         tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET6);
 458         tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET6);
 459
 460         if (tb[IFLA_GRE_LINK]) {
 461                 __u32 link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
 462
 463                 if (link) {
 464                         print_string(PRINT_ANY, "link", "dev %s ",
 465                                      ll_index_to_name(link));
 466                 }
 467         }
 468
 469         if (tb[IFLA_GRE_TTL])
 470                 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
 471         if (is_json_context() || ttl)
 472                 print_uint(PRINT_ANY, "ttl", "hoplimit %u ", ttl);
 473         else
 474                 print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit");
 475
 476         if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) {
 477                 print_bool(PRINT_ANY,
 478                            "ip6_tnl_f_ign_encap_limit",
 479                            "encaplimit none ",
 480                            true);
 481         } else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
 482                 __u8 val = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);
 483
 484                 print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
 485         }
 486
 487         if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
 488                 print_bool(PRINT_ANY,
 489                            "ip6_tnl_f_use_orig_tclass",
 490                            "tclass inherit ",
 491                            true);
 492         } else if (tb[IFLA_GRE_FLOWINFO]) {
 493                 __u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
 494
 495                 snprintf(s2, sizeof(s2), "0x%02x", val);
 496                 print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
 497         }
 498
 499         if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
 500                 print_bool(PRINT_ANY,
 501                            "ip6_tnl_f_use_orig_flowlabel",
 502                            "flowlabel inherit ",
 503                            true);
 504         } else if (tb[IFLA_GRE_FLOWINFO]) {
 505                 __u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);
 506
 507                 snprintf(s2, sizeof(s2), "0x%05x", val);
 508                 print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
 509         }
 510
 511         if (flags & IP6_TNL_F_RCV_DSCP_COPY)
 512                 print_bool(PRINT_ANY,
 513                            "ip6_tnl_f_rcv_dscp_copy",
 514                            "dscp inherit ",
 515                            true);
 516
 517         if (tb[IFLA_GRE_IFLAGS])
 518                 iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
 519
 520         if (tb[IFLA_GRE_OFLAGS])
 521                 oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
 522
 523         if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
 524                 inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
 525                 print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
 526         }
 527
 528         if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
 529                 inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
 530                 print_string(PRINT_ANY, "okey", "okey %s ", s2);
 531         }
 532
 533         if (iflags & GRE_SEQ)
 534                 print_bool(PRINT_ANY, "iseq", "iseq ", true);
 535         if (oflags & GRE_SEQ)
 536                 print_bool(PRINT_ANY, "oseq", "oseq ", true);
 537         if (iflags & GRE_CSUM)
 538                 print_bool(PRINT_ANY, "icsum", "icsum ", true);
 539         if (oflags & GRE_CSUM)
 540                 print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
 541
 542         if (flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE)
 543                 print_bool(PRINT_ANY,
 544                            "ip6_tnl_f_allow_local_remote",
 545                            "allow-localremote ",
 546                            true);
 547
 548         if (flags & IP6_TNL_F_USE_ORIG_FWMARK) {
 549                 print_bool(PRINT_ANY,
 550                            "ip6_tnl_f_use_orig_fwmark",
 551                            "fwmark inherit ",
 552                            true);
 553         } else if (tb[IFLA_GRE_FWMARK]) {
 554                 __u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
 555
 556                 if (fwmark) {
 557                         print_0xhex(PRINT_ANY,
 558                                     "fwmark", "fwmark 0x%x ", fwmark);
 559                 }
 560         }
 561
 562         if (tb[IFLA_GRE_ERSPAN_INDEX]) {
 563                 __u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
 564
 565                 print_uint(PRINT_ANY,
 566                            "erspan_index", "erspan_index %u ", erspan_idx);
 567         }
 568
 569         if (tb[IFLA_GRE_ERSPAN_VER]) {
 570                 __u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);
 571
 572                 print_uint(PRINT_ANY,
 573                            "erspan_ver", "erspan_ver %u ", erspan_ver);
 574         }
 575
 576         if (tb[IFLA_GRE_ERSPAN_DIR]) {
 577                 __u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);
 578
 579                 if (erspan_dir == 0)
 580                         print_string(PRINT_ANY, "erspan_dir",
 581                                      "erspan_dir ingress ", NULL);
 582                 else
 583                         print_string(PRINT_ANY, "erspan_dir",
 584                                      "erspan_dir egress ", NULL);
 585         }
 586
 587         if (tb[IFLA_GRE_ERSPAN_HWID]) {
 588                 __u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);
 589
 590                 print_0xhex(PRINT_ANY,
 591                             "erspan_hwid", "erspan_hwid 0x%x ", erspan_hwid);
 592         }
 593
 594         tnl_print_encap(tb,
 595                         IFLA_GRE_ENCAP_TYPE,
 596                         IFLA_GRE_ENCAP_FLAGS,
 597                         IFLA_GRE_ENCAP_SPORT,
 598                         IFLA_GRE_ENCAP_DPORT);
 599 }
 600
 601 struct link_util ip6gre_link_util = {
 602         .id = "ip6gre",
 603         .maxattr = IFLA_GRE_MAX,
 604         .parse_opt = gre_parse_opt,
 605         .print_opt = gre_print_opt,
 606         .print_help = gre_print_help,
 607 };
 608
 609 struct link_util ip6gretap_link_util = {
 610         .id = "ip6gretap",
 611         .maxattr = IFLA_GRE_MAX,
 612         .parse_opt = gre_parse_opt,
 613         .print_opt = gre_print_opt,
 614         .print_help = gre_print_help,
 615 };
 616
 617 struct link_util ip6erspan_link_util = {
 618         .id = "ip6erspan",
 619         .maxattr = IFLA_GRE_MAX,
 620         .parse_opt = gre_parse_opt,
 621         .print_opt = gre_print_opt,
 622         .print_help = gre_print_help,
 623 };