src/libsystemd/sd-netlink/rtnl-message.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <netinet/in.h>
   4 #include <linux/if_addrlabel.h>
   5 #include <stdbool.h>
   6 #include <unistd.h>
   7
   8 #include "sd-netlink.h"
   9
  10 #include "format-util.h"
  11 #include "missing.h"
  12 #include "netlink-internal.h"
  13 #include "netlink-types.h"
  14 #include "netlink-util.h"
  15 #include "refcnt.h"
  16 #include "socket-util.h"
  17 #include "util.h"
  18
  19 int sd_rtnl_message_route_set_dst_prefixlen(sd_netlink_message *m, unsigned char prefixlen) {
  20         struct rtmsg *rtm;
  21
  22         assert_return(m, -EINVAL);
  23         assert_return(m->hdr, -EINVAL);
  24         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
  25
  26         rtm = NLMSG_DATA(m->hdr);
  27
  28         if ((rtm->rtm_family == AF_INET && prefixlen > 32) ||
  29             (rtm->rtm_family == AF_INET6 && prefixlen > 128))
  30                 return -ERANGE;
  31
  32         rtm->rtm_dst_len = prefixlen;
  33
  34         return 0;
  35 }
  36
  37 int sd_rtnl_message_route_set_src_prefixlen(sd_netlink_message *m, unsigned char prefixlen) {
  38         struct rtmsg *rtm;
  39
  40         assert_return(m, -EINVAL);
  41         assert_return(m->hdr, -EINVAL);
  42         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
  43
  44         rtm = NLMSG_DATA(m->hdr);
  45
  46         if ((rtm->rtm_family == AF_INET && prefixlen > 32) ||
  47             (rtm->rtm_family == AF_INET6 && prefixlen > 128))
  48                 return -ERANGE;
  49
  50         rtm->rtm_src_len = prefixlen;
  51
  52         return 0;
  53 }
  54
  55 int sd_rtnl_message_route_set_scope(sd_netlink_message *m, unsigned char scope) {
  56         struct rtmsg *rtm;
  57
  58         assert_return(m, -EINVAL);
  59         assert_return(m->hdr, -EINVAL);
  60         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
  61
  62         rtm = NLMSG_DATA(m->hdr);
  63
  64         rtm->rtm_scope = scope;
  65
  66         return 0;
  67 }
  68
  69 int sd_rtnl_message_route_set_flags(sd_netlink_message *m, unsigned flags) {
  70         struct rtmsg *rtm;
  71
  72         assert_return(m, -EINVAL);
  73         assert_return(m->hdr, -EINVAL);
  74         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
  75
  76         rtm = NLMSG_DATA(m->hdr);
  77
  78         rtm->rtm_flags = flags;
  79
  80         return 0;
  81 }
  82
  83 int sd_rtnl_message_route_get_flags(sd_netlink_message *m, unsigned *flags) {
  84         struct rtmsg *rtm;
  85
  86         assert_return(m, -EINVAL);
  87         assert_return(m->hdr, -EINVAL);
  88         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
  89         assert_return(flags, -EINVAL);
  90
  91         rtm = NLMSG_DATA(m->hdr);
  92
  93         *flags = rtm->rtm_flags;
  94
  95         return 0;
  96 }
  97
  98 int sd_rtnl_message_route_set_table(sd_netlink_message *m, unsigned char table) {
  99         struct rtmsg *rtm;
 100
 101         assert_return(m, -EINVAL);
 102         assert_return(m->hdr, -EINVAL);
 103         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 104
 105         rtm = NLMSG_DATA(m->hdr);
 106
 107         rtm->rtm_table = table;
 108
 109         return 0;
 110 }
 111
 112 int sd_rtnl_message_route_get_family(sd_netlink_message *m, int *family) {
 113         struct rtmsg *rtm;
 114
 115         assert_return(m, -EINVAL);
 116         assert_return(m->hdr, -EINVAL);
 117         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 118         assert_return(family, -EINVAL);
 119
 120         rtm = NLMSG_DATA(m->hdr);
 121
 122         *family = rtm->rtm_family;
 123
 124         return 0;
 125 }
 126
 127 int sd_rtnl_message_route_set_family(sd_netlink_message *m, int family) {
 128         struct rtmsg *rtm;
 129
 130         assert_return(m, -EINVAL);
 131         assert_return(m->hdr, -EINVAL);
 132         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 133
 134         rtm = NLMSG_DATA(m->hdr);
 135
 136         rtm->rtm_family = family;
 137
 138         return 0;
 139 }
 140
 141 int sd_rtnl_message_route_get_type(sd_netlink_message *m, unsigned char *type) {
 142         struct rtmsg *rtm;
 143
 144         assert_return(m, -EINVAL);
 145         assert_return(m->hdr, -EINVAL);
 146         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 147         assert_return(type, -EINVAL);
 148
 149         rtm = NLMSG_DATA(m->hdr);
 150
 151         *type = rtm->rtm_type;
 152
 153         return 0;
 154 }
 155
 156 int sd_rtnl_message_route_set_type(sd_netlink_message *m, unsigned char type) {
 157         struct rtmsg *rtm;
 158
 159         assert_return(m, -EINVAL);
 160         assert_return(m->hdr, -EINVAL);
 161         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 162
 163         rtm = NLMSG_DATA(m->hdr);
 164
 165         rtm->rtm_type = type;
 166
 167         return 0;
 168 }
 169
 170 int sd_rtnl_message_route_get_protocol(sd_netlink_message *m, unsigned char *protocol) {
 171         struct rtmsg *rtm;
 172
 173         assert_return(m, -EINVAL);
 174         assert_return(m->hdr, -EINVAL);
 175         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 176         assert_return(protocol, -EINVAL);
 177
 178         rtm = NLMSG_DATA(m->hdr);
 179
 180         *protocol = rtm->rtm_protocol;
 181
 182         return 0;
 183 }
 184
 185 int sd_rtnl_message_route_get_scope(sd_netlink_message *m, unsigned char *scope) {
 186         struct rtmsg *rtm;
 187
 188         assert_return(m, -EINVAL);
 189         assert_return(m->hdr, -EINVAL);
 190         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 191         assert_return(scope, -EINVAL);
 192
 193         rtm = NLMSG_DATA(m->hdr);
 194
 195         *scope = rtm->rtm_scope;
 196
 197         return 0;
 198 }
 199
 200 int sd_rtnl_message_route_get_tos(sd_netlink_message *m, unsigned char *tos) {
 201         struct rtmsg *rtm;
 202
 203         assert_return(m, -EINVAL);
 204         assert_return(m->hdr, -EINVAL);
 205         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 206         assert_return(tos, -EINVAL);
 207
 208         rtm = NLMSG_DATA(m->hdr);
 209
 210         *tos = rtm->rtm_tos;
 211
 212         return 0;
 213 }
 214
 215 int sd_rtnl_message_route_get_table(sd_netlink_message *m, unsigned char *table) {
 216         struct rtmsg *rtm;
 217
 218         assert_return(m, -EINVAL);
 219         assert_return(m->hdr, -EINVAL);
 220         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 221         assert_return(table, -EINVAL);
 222
 223         rtm = NLMSG_DATA(m->hdr);
 224
 225         *table = rtm->rtm_table;
 226
 227         return 0;
 228 }
 229
 230 int sd_rtnl_message_route_get_dst_prefixlen(sd_netlink_message *m, unsigned char *dst_len) {
 231         struct rtmsg *rtm;
 232
 233         assert_return(m, -EINVAL);
 234         assert_return(m->hdr, -EINVAL);
 235         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 236         assert_return(dst_len, -EINVAL);
 237
 238         rtm = NLMSG_DATA(m->hdr);
 239
 240         *dst_len = rtm->rtm_dst_len;
 241
 242         return 0;
 243 }
 244
 245 int sd_rtnl_message_route_get_src_prefixlen(sd_netlink_message *m, unsigned char *src_len) {
 246         struct rtmsg *rtm;
 247
 248         assert_return(m, -EINVAL);
 249         assert_return(m->hdr, -EINVAL);
 250         assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
 251         assert_return(src_len, -EINVAL);
 252
 253         rtm = NLMSG_DATA(m->hdr);
 254
 255         *src_len = rtm->rtm_src_len;
 256
 257         return 0;
 258 }
 259
 260 int sd_rtnl_message_new_route(sd_netlink *rtnl, sd_netlink_message **ret,
 261                               uint16_t nlmsg_type, int rtm_family,
 262                               unsigned char rtm_protocol) {
 263         struct rtmsg *rtm;
 264         int r;
 265
 266         assert_return(rtnl_message_type_is_route(nlmsg_type), -EINVAL);
 267         assert_return((nlmsg_type == RTM_GETROUTE && rtm_family == AF_UNSPEC) ||
 268                       IN_SET(rtm_family, AF_INET, AF_INET6), -EINVAL);
 269         assert_return(ret, -EINVAL);
 270
 271         r = message_new(rtnl, ret, nlmsg_type);
 272         if (r < 0)
 273                 return r;
 274
 275         if (nlmsg_type == RTM_NEWROUTE)
 276                 (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND;
 277
 278         rtm = NLMSG_DATA((*ret)->hdr);
 279
 280         rtm->rtm_family = rtm_family;
 281         rtm->rtm_scope = RT_SCOPE_UNIVERSE;
 282         rtm->rtm_type = RTN_UNICAST;
 283         rtm->rtm_table = RT_TABLE_MAIN;
 284         rtm->rtm_protocol = rtm_protocol;
 285
 286         return 0;
 287 }
 288
 289 int sd_rtnl_message_neigh_set_flags(sd_netlink_message *m, uint8_t flags) {
 290         struct ndmsg *ndm;
 291
 292         assert_return(m, -EINVAL);
 293         assert_return(m->hdr, -EINVAL);
 294         assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
 295
 296         ndm = NLMSG_DATA(m->hdr);
 297         ndm->ndm_flags |= flags;
 298
 299         return 0;
 300 }
 301
 302 int sd_rtnl_message_neigh_set_state(sd_netlink_message *m, uint16_t state) {
 303         struct ndmsg *ndm;
 304
 305         assert_return(m, -EINVAL);
 306         assert_return(m->hdr, -EINVAL);
 307         assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
 308
 309         ndm = NLMSG_DATA(m->hdr);
 310         ndm->ndm_state |= state;
 311
 312         return 0;
 313 }
 314
 315 int sd_rtnl_message_neigh_get_flags(sd_netlink_message *m, uint8_t *flags) {
 316         struct ndmsg *ndm;
 317
 318         assert_return(m, -EINVAL);
 319         assert_return(m->hdr, -EINVAL);
 320         assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
 321
 322         ndm = NLMSG_DATA(m->hdr);
 323         *flags = ndm->ndm_flags;
 324
 325         return 0;
 326 }
 327
 328 int sd_rtnl_message_neigh_get_state(sd_netlink_message *m, uint16_t *state) {
 329         struct ndmsg *ndm;
 330
 331         assert_return(m, -EINVAL);
 332         assert_return(m->hdr, -EINVAL);
 333         assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
 334
 335         ndm = NLMSG_DATA(m->hdr);
 336         *state = ndm->ndm_state;
 337
 338         return 0;
 339 }
 340
 341 int sd_rtnl_message_neigh_get_family(sd_netlink_message *m, int *family) {
 342         struct ndmsg *ndm;
 343
 344         assert_return(m, -EINVAL);
 345         assert_return(m->hdr, -EINVAL);
 346         assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
 347         assert_return(family, -EINVAL);
 348
 349         ndm = NLMSG_DATA(m->hdr);
 350
 351         *family = ndm->ndm_family;
 352
 353         return 0;
 354 }
 355
 356 int sd_rtnl_message_neigh_get_ifindex(sd_netlink_message *m, int *index) {
 357         struct ndmsg *ndm;
 358
 359         assert_return(m, -EINVAL);
 360         assert_return(m->hdr, -EINVAL);
 361         assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
 362         assert_return(index, -EINVAL);
 363
 364         ndm = NLMSG_DATA(m->hdr);
 365
 366         *index = ndm->ndm_ifindex;
 367
 368         return 0;
 369 }
 370
 371 int sd_rtnl_message_new_neigh(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t nlmsg_type, int index, int ndm_family) {
 372         struct ndmsg *ndm;
 373         int r;
 374
 375         assert_return(rtnl_message_type_is_neigh(nlmsg_type), -EINVAL);
 376         assert_return(IN_SET(ndm_family, AF_INET, AF_INET6, PF_BRIDGE), -EINVAL);
 377         assert_return(ret, -EINVAL);
 378
 379         r = message_new(rtnl, ret, nlmsg_type);
 380         if (r < 0)
 381                 return r;
 382
 383         if (nlmsg_type == RTM_NEWNEIGH)
 384                 (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND;
 385
 386         ndm = NLMSG_DATA((*ret)->hdr);
 387
 388         ndm->ndm_family = ndm_family;
 389         ndm->ndm_ifindex = index;
 390
 391         return 0;
 392 }
 393
 394 int sd_rtnl_message_link_set_flags(sd_netlink_message *m, unsigned flags, unsigned change) {
 395         struct ifinfomsg *ifi;
 396
 397         assert_return(m, -EINVAL);
 398         assert_return(m->hdr, -EINVAL);
 399         assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
 400         assert_return(change, -EINVAL);
 401
 402         ifi = NLMSG_DATA(m->hdr);
 403
 404         ifi->ifi_flags = flags;
 405         ifi->ifi_change = change;
 406
 407         return 0;
 408 }
 409
 410 int sd_rtnl_message_link_set_type(sd_netlink_message *m, unsigned type) {
 411         struct ifinfomsg *ifi;
 412
 413         assert_return(m, -EINVAL);
 414         assert_return(m->hdr, -EINVAL);
 415         assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
 416
 417         ifi = NLMSG_DATA(m->hdr);
 418
 419         ifi->ifi_type = type;
 420
 421         return 0;
 422 }
 423
 424 int sd_rtnl_message_link_set_family(sd_netlink_message *m, unsigned family) {
 425         struct ifinfomsg *ifi;
 426
 427         assert_return(m, -EINVAL);
 428         assert_return(m->hdr, -EINVAL);
 429         assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
 430
 431         ifi = NLMSG_DATA(m->hdr);
 432
 433         ifi->ifi_family = family;
 434
 435         return 0;
 436 }
 437
 438 int sd_rtnl_message_new_link(sd_netlink *rtnl, sd_netlink_message **ret,
 439                              uint16_t nlmsg_type, int index) {
 440         struct ifinfomsg *ifi;
 441         int r;
 442
 443         assert_return(rtnl_message_type_is_link(nlmsg_type), -EINVAL);
 444         assert_return(ret, -EINVAL);
 445
 446         r = message_new(rtnl, ret, nlmsg_type);
 447         if (r < 0)
 448                 return r;
 449
 450         if (nlmsg_type == RTM_NEWLINK)
 451                 (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
 452
 453         ifi = NLMSG_DATA((*ret)->hdr);
 454
 455         ifi->ifi_family = AF_UNSPEC;
 456         ifi->ifi_index = index;
 457
 458         return 0;
 459 }
 460
 461 int sd_rtnl_message_addr_set_prefixlen(sd_netlink_message *m, unsigned char prefixlen) {
 462         struct ifaddrmsg *ifa;
 463
 464         assert_return(m, -EINVAL);
 465         assert_return(m->hdr, -EINVAL);
 466         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 467
 468         ifa = NLMSG_DATA(m->hdr);
 469
 470         if ((ifa->ifa_family == AF_INET && prefixlen > 32) ||
 471             (ifa->ifa_family == AF_INET6 && prefixlen > 128))
 472                 return -ERANGE;
 473
 474         ifa->ifa_prefixlen = prefixlen;
 475
 476         return 0;
 477 }
 478
 479 int sd_rtnl_message_addr_set_flags(sd_netlink_message *m, unsigned char flags) {
 480         struct ifaddrmsg *ifa;
 481
 482         assert_return(m, -EINVAL);
 483         assert_return(m->hdr, -EINVAL);
 484         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 485
 486         ifa = NLMSG_DATA(m->hdr);
 487
 488         ifa->ifa_flags = flags;
 489
 490         return 0;
 491 }
 492
 493 int sd_rtnl_message_addr_set_scope(sd_netlink_message *m, unsigned char scope) {
 494         struct ifaddrmsg *ifa;
 495
 496         assert_return(m, -EINVAL);
 497         assert_return(m->hdr, -EINVAL);
 498         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 499
 500         ifa = NLMSG_DATA(m->hdr);
 501
 502         ifa->ifa_scope = scope;
 503
 504         return 0;
 505 }
 506
 507 int sd_rtnl_message_addr_get_family(sd_netlink_message *m, int *family) {
 508         struct ifaddrmsg *ifa;
 509
 510         assert_return(m, -EINVAL);
 511         assert_return(m->hdr, -EINVAL);
 512         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 513         assert_return(family, -EINVAL);
 514
 515         ifa = NLMSG_DATA(m->hdr);
 516
 517         *family = ifa->ifa_family;
 518
 519         return 0;
 520 }
 521
 522 int sd_rtnl_message_addr_get_prefixlen(sd_netlink_message *m, unsigned char *prefixlen) {
 523         struct ifaddrmsg *ifa;
 524
 525         assert_return(m, -EINVAL);
 526         assert_return(m->hdr, -EINVAL);
 527         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 528         assert_return(prefixlen, -EINVAL);
 529
 530         ifa = NLMSG_DATA(m->hdr);
 531
 532         *prefixlen = ifa->ifa_prefixlen;
 533
 534         return 0;
 535 }
 536
 537 int sd_rtnl_message_addr_get_scope(sd_netlink_message *m, unsigned char *scope) {
 538         struct ifaddrmsg *ifa;
 539
 540         assert_return(m, -EINVAL);
 541         assert_return(m->hdr, -EINVAL);
 542         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 543         assert_return(scope, -EINVAL);
 544
 545         ifa = NLMSG_DATA(m->hdr);
 546
 547         *scope = ifa->ifa_scope;
 548
 549         return 0;
 550 }
 551
 552 int sd_rtnl_message_addr_get_flags(sd_netlink_message *m, unsigned char *flags) {
 553         struct ifaddrmsg *ifa;
 554
 555         assert_return(m, -EINVAL);
 556         assert_return(m->hdr, -EINVAL);
 557         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 558         assert_return(flags, -EINVAL);
 559
 560         ifa = NLMSG_DATA(m->hdr);
 561
 562         *flags = ifa->ifa_flags;
 563
 564         return 0;
 565 }
 566
 567 int sd_rtnl_message_addr_get_ifindex(sd_netlink_message *m, int *ifindex) {
 568         struct ifaddrmsg *ifa;
 569
 570         assert_return(m, -EINVAL);
 571         assert_return(m->hdr, -EINVAL);
 572         assert_return(rtnl_message_type_is_addr(m->hdr->nlmsg_type), -EINVAL);
 573         assert_return(ifindex, -EINVAL);
 574
 575         ifa = NLMSG_DATA(m->hdr);
 576
 577         *ifindex = ifa->ifa_index;
 578
 579         return 0;
 580 }
 581
 582 int sd_rtnl_message_new_addr(sd_netlink *rtnl, sd_netlink_message **ret,
 583                              uint16_t nlmsg_type, int index,
 584                              int family) {
 585         struct ifaddrmsg *ifa;
 586         int r;
 587
 588         assert_return(rtnl_message_type_is_addr(nlmsg_type), -EINVAL);
 589         assert_return((nlmsg_type == RTM_GETADDR && index == 0) ||
 590                       index > 0, -EINVAL);
 591         assert_return((nlmsg_type == RTM_GETADDR && family == AF_UNSPEC) ||
 592                       IN_SET(family, AF_INET, AF_INET6), -EINVAL);
 593         assert_return(ret, -EINVAL);
 594
 595         r = message_new(rtnl, ret, nlmsg_type);
 596         if (r < 0)
 597                 return r;
 598
 599         if (nlmsg_type == RTM_GETADDR)
 600                 (*ret)->hdr->nlmsg_flags |= NLM_F_DUMP;
 601
 602         ifa = NLMSG_DATA((*ret)->hdr);
 603
 604         ifa->ifa_index = index;
 605         ifa->ifa_family = family;
 606         if (family == AF_INET)
 607                 ifa->ifa_prefixlen = 32;
 608         else if (family == AF_INET6)
 609                 ifa->ifa_prefixlen = 128;
 610
 611         return 0;
 612 }
 613
 614 int sd_rtnl_message_new_addr_update(sd_netlink *rtnl, sd_netlink_message **ret,
 615                              int index, int family) {
 616         int r;
 617
 618         r = sd_rtnl_message_new_addr(rtnl, ret, RTM_NEWADDR, index, family);
 619         if (r < 0)
 620                 return r;
 621
 622         (*ret)->hdr->nlmsg_flags |= NLM_F_REPLACE;
 623
 624         return 0;
 625 }
 626
 627 int sd_rtnl_message_link_get_ifindex(sd_netlink_message *m, int *ifindex) {
 628         struct ifinfomsg *ifi;
 629
 630         assert_return(m, -EINVAL);
 631         assert_return(m->hdr, -EINVAL);
 632         assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
 633         assert_return(ifindex, -EINVAL);
 634
 635         ifi = NLMSG_DATA(m->hdr);
 636
 637         *ifindex = ifi->ifi_index;
 638
 639         return 0;
 640 }
 641
 642 int sd_rtnl_message_link_get_flags(sd_netlink_message *m, unsigned *flags) {
 643         struct ifinfomsg *ifi;
 644
 645         assert_return(m, -EINVAL);
 646         assert_return(m->hdr, -EINVAL);
 647         assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
 648         assert_return(flags, -EINVAL);
 649
 650         ifi = NLMSG_DATA(m->hdr);
 651
 652         *flags = ifi->ifi_flags;
 653
 654         return 0;
 655 }
 656
 657 int sd_rtnl_message_link_get_type(sd_netlink_message *m, unsigned short *type) {
 658         struct ifinfomsg *ifi;
 659
 660         assert_return(m, -EINVAL);
 661         assert_return(m->hdr, -EINVAL);
 662         assert_return(rtnl_message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
 663         assert_return(type, -EINVAL);
 664
 665         ifi = NLMSG_DATA(m->hdr);
 666
 667         *type = ifi->ifi_type;
 668
 669         return 0;
 670 }
 671
 672 int sd_rtnl_message_get_family(sd_netlink_message *m, int *family) {
 673         assert_return(m, -EINVAL);
 674         assert_return(family, -EINVAL);
 675
 676         assert(m->hdr);
 677
 678         if (rtnl_message_type_is_link(m->hdr->nlmsg_type)) {
 679                 struct ifinfomsg *ifi;
 680
 681                 ifi = NLMSG_DATA(m->hdr);
 682
 683                 *family = ifi->ifi_family;
 684
 685                 return 0;
 686         } else if (rtnl_message_type_is_route(m->hdr->nlmsg_type)) {
 687                 struct rtmsg *rtm;
 688
 689                 rtm = NLMSG_DATA(m->hdr);
 690
 691                 *family = rtm->rtm_family;
 692
 693                 return 0;
 694         } else if (rtnl_message_type_is_neigh(m->hdr->nlmsg_type)) {
 695                 struct ndmsg *ndm;
 696
 697                 ndm = NLMSG_DATA(m->hdr);
 698
 699                 *family = ndm->ndm_family;
 700
 701                 return 0;
 702         } else if (rtnl_message_type_is_addr(m->hdr->nlmsg_type)) {
 703                 struct ifaddrmsg *ifa;
 704
 705                 ifa = NLMSG_DATA(m->hdr);
 706
 707                 *family = ifa->ifa_family;
 708
 709                 return 0;
 710         } else if (rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type)) {
 711                 struct rtmsg *rtm;
 712
 713                 rtm = NLMSG_DATA(m->hdr);
 714
 715                 *family = rtm->rtm_family;
 716
 717                 return 0;
 718         }
 719
 720         return -EOPNOTSUPP;
 721 }
 722
 723 int sd_rtnl_message_new_addrlabel(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t nlmsg_type, int ifindex, int ifal_family) {
 724         struct ifaddrlblmsg *addrlabel;
 725         int r;
 726
 727         assert_return(rtnl_message_type_is_addrlabel(nlmsg_type), -EINVAL);
 728         assert_return(ret, -EINVAL);
 729
 730         r = message_new(rtnl, ret, nlmsg_type);
 731         if (r < 0)
 732                 return r;
 733
 734         if (nlmsg_type == RTM_NEWADDRLABEL)
 735                 (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
 736
 737         addrlabel = NLMSG_DATA((*ret)->hdr);
 738
 739         addrlabel->ifal_family = ifal_family;
 740         addrlabel->ifal_index = ifindex;
 741
 742         return 0;
 743 }
 744
 745 int sd_rtnl_message_addrlabel_set_prefixlen(sd_netlink_message *m, unsigned char prefixlen) {
 746         struct ifaddrlblmsg *addrlabel;
 747
 748         assert_return(m, -EINVAL);
 749         assert_return(m->hdr, -EINVAL);
 750         assert_return(rtnl_message_type_is_addrlabel(m->hdr->nlmsg_type), -EINVAL);
 751
 752         addrlabel = NLMSG_DATA(m->hdr);
 753
 754         if (prefixlen > 128)
 755                 return -ERANGE;
 756
 757         addrlabel->ifal_prefixlen = prefixlen;
 758
 759         return 0;
 760 }
 761
 762 int sd_rtnl_message_addrlabel_get_prefixlen(sd_netlink_message *m, unsigned char *prefixlen) {
 763         struct ifaddrlblmsg *addrlabel;
 764
 765         assert_return(m, -EINVAL);
 766         assert_return(m->hdr, -EINVAL);
 767         assert_return(rtnl_message_type_is_addrlabel(m->hdr->nlmsg_type), -EINVAL);
 768
 769         addrlabel = NLMSG_DATA(m->hdr);
 770
 771         *prefixlen = addrlabel->ifal_prefixlen;
 772
 773         return 0;
 774 }
 775
 776 int sd_rtnl_message_new_routing_policy_rule(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t nlmsg_type, int ifal_family) {
 777         struct rtmsg *rtm;
 778         int r;
 779
 780         assert_return(rtnl_message_type_is_routing_policy_rule(nlmsg_type), -EINVAL);
 781         assert_return(ret, -EINVAL);
 782
 783         r = message_new(rtnl, ret, nlmsg_type);
 784         if (r < 0)
 785                 return r;
 786
 787         if (nlmsg_type == RTM_NEWRULE)
 788                 (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
 789
 790         rtm = NLMSG_DATA((*ret)->hdr);
 791         rtm->rtm_family = ifal_family;
 792         rtm->rtm_protocol = RTPROT_BOOT;
 793         rtm->rtm_scope = RT_SCOPE_UNIVERSE;
 794         rtm->rtm_type = RTN_UNICAST;
 795
 796         return 0;
 797 }
 798
 799 int sd_rtnl_message_routing_policy_rule_set_tos(sd_netlink_message *m, unsigned char tos) {
 800         struct rtmsg *routing_policy_rule;
 801
 802         assert_return(m, -EINVAL);
 803         assert_return(m->hdr, -EINVAL);
 804         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 805
 806         routing_policy_rule = NLMSG_DATA(m->hdr);
 807
 808         routing_policy_rule->rtm_tos = tos;
 809
 810         return 0;
 811 }
 812
 813 int sd_rtnl_message_routing_policy_rule_get_tos(sd_netlink_message *m, unsigned char *tos) {
 814         struct rtmsg *routing_policy_rule;
 815
 816         assert_return(m, -EINVAL);
 817         assert_return(m->hdr, -EINVAL);
 818         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 819
 820         routing_policy_rule = NLMSG_DATA(m->hdr);
 821
 822         *tos = routing_policy_rule->rtm_tos;
 823
 824         return 0;
 825 }
 826
 827 int sd_rtnl_message_routing_policy_rule_set_table(sd_netlink_message *m, unsigned char table) {
 828         struct rtmsg *routing_policy_rule;
 829
 830         assert_return(m, -EINVAL);
 831         assert_return(m->hdr, -EINVAL);
 832         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 833
 834         routing_policy_rule = NLMSG_DATA(m->hdr);
 835
 836         routing_policy_rule->rtm_table = table;
 837
 838         return 0;
 839 }
 840
 841 int sd_rtnl_message_routing_policy_rule_get_table(sd_netlink_message *m, unsigned char *table) {
 842         struct rtmsg *routing_policy_rule;
 843
 844         assert_return(m, -EINVAL);
 845         assert_return(m->hdr, -EINVAL);
 846         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 847
 848         routing_policy_rule = NLMSG_DATA(m->hdr);
 849
 850         *table = routing_policy_rule->rtm_table;
 851
 852         return 0;
 853 }
 854
 855 int sd_rtnl_message_routing_policy_rule_set_rtm_type(sd_netlink_message *m, unsigned char type) {
 856         struct rtmsg *routing_policy_rule;
 857
 858         assert_return(m, -EINVAL);
 859         assert_return(m->hdr, -EINVAL);
 860         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 861
 862         routing_policy_rule = NLMSG_DATA(m->hdr);
 863
 864         routing_policy_rule->rtm_type = type;
 865
 866         return 0;
 867 }
 868
 869 int sd_rtnl_message_routing_policy_rule_get_rtm_type(sd_netlink_message *m, unsigned char *type) {
 870         struct rtmsg *routing_policy_rule;
 871
 872         assert_return(m, -EINVAL);
 873         assert_return(m->hdr, -EINVAL);
 874         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 875
 876         routing_policy_rule = NLMSG_DATA(m->hdr);
 877
 878         *type =  routing_policy_rule->rtm_type;
 879
 880         return 0;
 881 }
 882
 883 int sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(sd_netlink_message *m, unsigned char len) {
 884         struct rtmsg *routing_policy_rule;
 885
 886         assert_return(m, -EINVAL);
 887         assert_return(m->hdr, -EINVAL);
 888         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 889
 890         routing_policy_rule = NLMSG_DATA(m->hdr);
 891
 892         routing_policy_rule->rtm_dst_len = len;
 893
 894         return 0;
 895 }
 896
 897 int sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(sd_netlink_message *m, unsigned char *len) {
 898         struct rtmsg *routing_policy_rule;
 899
 900         assert_return(m, -EINVAL);
 901         assert_return(m->hdr, -EINVAL);
 902         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 903
 904         routing_policy_rule = NLMSG_DATA(m->hdr);
 905
 906         *len = routing_policy_rule->rtm_dst_len;
 907
 908         return 0;
 909 }
 910
 911 int sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(sd_netlink_message *m, unsigned char len) {
 912         struct rtmsg *routing_policy_rule;
 913
 914         assert_return(m, -EINVAL);
 915         assert_return(m->hdr, -EINVAL);
 916         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 917
 918         routing_policy_rule = NLMSG_DATA(m->hdr);
 919
 920         routing_policy_rule->rtm_src_len = len;
 921
 922         return 0;
 923 }
 924
 925 int sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(sd_netlink_message *m, unsigned char *len) {
 926         struct rtmsg *routing_policy_rule;
 927
 928         assert_return(m, -EINVAL);
 929         assert_return(m->hdr, -EINVAL);
 930         assert_return(rtnl_message_type_is_routing_policy_rule(m->hdr->nlmsg_type), -EINVAL);
 931
 932         routing_policy_rule = NLMSG_DATA(m->hdr);
 933
 934         *len = routing_policy_rule->rtm_src_len;
 935
 936         return 0;
 937 }