1/* 2 * Driver interaction with Linux MACsec kernel module 3 * Copyright (c) 2016, Sabrina Dubroca <sd@queasysnail.net> and Red Hat, Inc. 4 * Copyright (c) 2019, The Linux Foundation 5 * 6 * This software may be distributed under the terms of the BSD license. 7 * See README for more details. 8 */ 9 10#include "includes.h" 11#include <sys/ioctl.h> 12#include <net/if.h> 13#include <netpacket/packet.h> 14#include <net/if_arp.h> 15#include <net/if.h> 16#include <netlink/netlink.h> 17#include <netlink/genl/genl.h> 18#include <netlink/genl/ctrl.h> 19#include <netlink/route/link.h> 20#include <netlink/route/link/macsec.h> 21#include <linux/if_macsec.h> 22#include <inttypes.h> 23 24#include "utils/common.h" 25#include "utils/eloop.h" 26#include "common/eapol_common.h" 27#include "pae/ieee802_1x_kay.h" 28#include "driver.h" 29#include "driver_wired_common.h" 30 31#define DRV_PREFIX "macsec_linux: " 32 33#define UNUSED_SCI 0xffffffffffffffff 34 35struct cb_arg { 36 struct macsec_drv_data *drv; 37 u32 *pn; 38 int ifindex; 39 u8 txsa; 40 u8 rxsa; 41 u64 rxsci; 42}; 43 44struct macsec_genl_ctx { 45 struct nl_sock *sk; 46 int macsec_genl_id; 47 struct cb_arg cb_arg; 48}; 49 50struct macsec_drv_data { 51 struct driver_wired_common_data common; 52 struct rtnl_link *link; 53 struct nl_cache *link_cache; 54 struct nl_sock *sk; 55 struct macsec_genl_ctx ctx; 56 57 char ifname[IFNAMSIZ + 1]; 58 int ifi; 59 int parent_ifi; 60 int use_pae_group_addr; 61 62 bool created_link; 63 64 bool controlled_port_enabled; 65 bool controlled_port_enabled_set; 66 67 bool protect_frames; 68 bool protect_frames_set; 69 70 bool encrypt; 71 bool encrypt_set; 72 73 bool replay_protect; 74 bool replay_protect_set; 75 76 u32 replay_window; 77 78 u8 encoding_sa; 79 bool encoding_sa_set; 80}; 81 82 83static int dump_callback(struct nl_msg *msg, void *argp); 84 85 86static struct nl_msg * msg_prepare(enum macsec_nl_commands cmd, 87 const struct macsec_genl_ctx *ctx, 88 unsigned int ifindex) 89{ 90 struct nl_msg *msg; 91 92 msg = nlmsg_alloc(); 93 if (!msg) { 94 wpa_printf(MSG_ERROR, DRV_PREFIX "failed to alloc message"); 95 return NULL; 96 } 97 98 if (!genlmsg_put(msg, 0, 0, ctx->macsec_genl_id, 0, 0, cmd, 0)) { 99 wpa_printf(MSG_ERROR, DRV_PREFIX "failed to put header"); 100 goto nla_put_failure; 101 } 102 103 NLA_PUT_U32(msg, MACSEC_ATTR_IFINDEX, ifindex); 104 105 return msg; 106 107nla_put_failure: 108 nlmsg_free(msg); 109 return NULL; 110} 111 112 113static int nla_put_rxsc_config(struct nl_msg *msg, u64 sci) 114{ 115 struct nlattr *nest = nla_nest_start(msg, MACSEC_ATTR_RXSC_CONFIG); 116 117 if (!nest) 118 return -1; 119 120 NLA_PUT_U64(msg, MACSEC_RXSC_ATTR_SCI, sci); 121 122 nla_nest_end(msg, nest); 123 124 return 0; 125 126nla_put_failure: 127 return -1; 128} 129 130 131static int init_genl_ctx(struct macsec_drv_data *drv) 132{ 133 struct macsec_genl_ctx *ctx = &drv->ctx; 134 135 ctx->sk = nl_socket_alloc(); 136 if (!ctx->sk) { 137 wpa_printf(MSG_ERROR, DRV_PREFIX "failed to alloc genl socket"); 138 return -1; 139 } 140 141 if (genl_connect(ctx->sk) < 0) { 142 wpa_printf(MSG_ERROR, 143 DRV_PREFIX "connection to genl socket failed"); 144 goto out_free; 145 } 146 147 ctx->macsec_genl_id = genl_ctrl_resolve(ctx->sk, "macsec"); 148 if (ctx->macsec_genl_id < 0) { 149 wpa_printf(MSG_ERROR, DRV_PREFIX "genl resolve failed"); 150 goto out_free; 151 } 152 153 memset(&ctx->cb_arg, 0, sizeof(ctx->cb_arg)); 154 ctx->cb_arg.drv = drv; 155 156 nl_socket_modify_cb(ctx->sk, NL_CB_VALID, NL_CB_CUSTOM, dump_callback, 157 &ctx->cb_arg); 158 159 return 0; 160 161out_free: 162 nl_socket_free(ctx->sk); 163 ctx->sk = NULL; 164 return -1; 165} 166 167 168static int try_commit(struct macsec_drv_data *drv) 169{ 170 int err; 171 172 if (!drv->sk) 173 return 0; 174 175 if (!drv->link) 176 return 0; 177 178 if (drv->controlled_port_enabled_set) { 179 struct rtnl_link *change = rtnl_link_alloc(); 180 181 wpa_printf(MSG_DEBUG, DRV_PREFIX 182 "%s: try_commit controlled_port_enabled=%d", 183 drv->ifname, drv->controlled_port_enabled); 184 if (!change) 185 return -1; 186 187 rtnl_link_set_name(change, drv->ifname); 188 189 if (drv->controlled_port_enabled) 190 rtnl_link_set_flags(change, IFF_UP); 191 else 192 rtnl_link_unset_flags(change, IFF_UP); 193 194 err = rtnl_link_change(drv->sk, change, change, 0); 195 if (err < 0) 196 return err; 197 198 rtnl_link_put(change); 199 200 drv->controlled_port_enabled_set = false; 201 } 202 203 if (drv->protect_frames_set) { 204 wpa_printf(MSG_DEBUG, DRV_PREFIX 205 "%s: try_commit protect_frames=%d", 206 drv->ifname, drv->protect_frames); 207 rtnl_link_macsec_set_protect(drv->link, drv->protect_frames); 208 } 209 210 if (drv->encrypt_set) { 211 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: try_commit encrypt=%d", 212 drv->ifname, drv->encrypt); 213 rtnl_link_macsec_set_encrypt(drv->link, drv->encrypt); 214 } 215 216 if (drv->replay_protect_set) { 217 wpa_printf(MSG_DEBUG, DRV_PREFIX 218 "%s: try_commit replay_protect=%d replay_window=%d", 219 drv->ifname, drv->replay_protect, 220 drv->replay_window); 221 rtnl_link_macsec_set_replay_protect(drv->link, 222 drv->replay_protect); 223 if (drv->replay_protect) 224 rtnl_link_macsec_set_window(drv->link, 225 drv->replay_window); 226 } 227 228 if (drv->encoding_sa_set) { 229 wpa_printf(MSG_DEBUG, DRV_PREFIX 230 "%s: try_commit encoding_sa=%d", 231 drv->ifname, drv->encoding_sa); 232 rtnl_link_macsec_set_encoding_sa(drv->link, drv->encoding_sa); 233 } 234 235 err = rtnl_link_add(drv->sk, drv->link, 0); 236 if (err < 0) 237 return err; 238 239 drv->protect_frames_set = false; 240 drv->encrypt_set = false; 241 drv->replay_protect_set = false; 242 243 return 0; 244} 245 246 247static void macsec_drv_wpa_deinit(void *priv) 248{ 249 struct macsec_drv_data *drv = priv; 250 251 driver_wired_deinit_common(&drv->common); 252 os_free(drv); 253} 254 255 256static int macsec_check_macsec(void) 257{ 258 struct nl_sock *sk; 259 int err = -1; 260 261 sk = nl_socket_alloc(); 262 if (!sk) { 263 wpa_printf(MSG_ERROR, DRV_PREFIX "failed to alloc genl socket"); 264 return -1; 265 } 266 267 if (genl_connect(sk) < 0) { 268 wpa_printf(MSG_ERROR, 269 DRV_PREFIX "connection to genl socket failed"); 270 goto out_free; 271 } 272 273 if (genl_ctrl_resolve(sk, "macsec") < 0) { 274 wpa_printf(MSG_ERROR, 275 DRV_PREFIX "genl resolve failed - macsec kernel module not present?"); 276 goto out_free; 277 } 278 279 err = 0; 280 281out_free: 282 nl_socket_free(sk); 283 return err; 284} 285 286 287static void * macsec_drv_wpa_init(void *ctx, const char *ifname) 288{ 289 struct macsec_drv_data *drv; 290 291 if (macsec_check_macsec() < 0) 292 return NULL; 293 294 drv = os_zalloc(sizeof(*drv)); 295 if (!drv) 296 return NULL; 297 298 if (driver_wired_init_common(&drv->common, ifname, ctx) < 0) { 299 os_free(drv); 300 return NULL; 301 } 302 303 return drv; 304} 305 306 307static int macsec_drv_macsec_init(void *priv, struct macsec_init_params *params) 308{ 309 struct macsec_drv_data *drv = priv; 310 int err; 311 312 wpa_printf(MSG_DEBUG, "%s", __func__); 313 314 drv->sk = nl_socket_alloc(); 315 if (!drv->sk) 316 return -1; 317 318 err = nl_connect(drv->sk, NETLINK_ROUTE); 319 if (err < 0) { 320 wpa_printf(MSG_ERROR, DRV_PREFIX 321 "Unable to connect NETLINK_ROUTE socket: %s", 322 nl_geterror(err)); 323 goto sock; 324 } 325 326 err = rtnl_link_alloc_cache(drv->sk, AF_UNSPEC, &drv->link_cache); 327 if (err < 0) { 328 wpa_printf(MSG_ERROR, DRV_PREFIX "Unable to get link cache: %s", 329 nl_geterror(err)); 330 goto sock; 331 } 332 333 drv->parent_ifi = rtnl_link_name2i(drv->link_cache, drv->common.ifname); 334 if (drv->parent_ifi == 0) { 335 wpa_printf(MSG_ERROR, DRV_PREFIX 336 "couldn't find ifindex for interface %s", 337 drv->common.ifname); 338 goto cache; 339 } 340 wpa_printf(MSG_DEBUG, DRV_PREFIX "ifname=%s parent_ifi=%d", 341 drv->common.ifname, drv->parent_ifi); 342 343 err = init_genl_ctx(drv); 344 if (err < 0) 345 goto cache; 346 347 return 0; 348 349cache: 350 nl_cache_free(drv->link_cache); 351 drv->link_cache = NULL; 352sock: 353 nl_socket_free(drv->sk); 354 drv->sk = NULL; 355 return -1; 356} 357 358 359static int macsec_drv_macsec_deinit(void *priv) 360{ 361 struct macsec_drv_data *drv = priv; 362 363 wpa_printf(MSG_DEBUG, "%s", __func__); 364 365 if (drv->sk) 366 nl_socket_free(drv->sk); 367 drv->sk = NULL; 368 369 if (drv->link_cache) 370 nl_cache_free(drv->link_cache); 371 drv->link_cache = NULL; 372 373 if (drv->ctx.sk) 374 nl_socket_free(drv->ctx.sk); 375 376 return 0; 377} 378 379 380static int macsec_drv_get_capability(void *priv, enum macsec_cap *cap) 381{ 382 wpa_printf(MSG_DEBUG, "%s", __func__); 383 384 *cap = MACSEC_CAP_INTEG_AND_CONF; 385 386 return 0; 387} 388 389 390/** 391 * macsec_drv_enable_protect_frames - Set protect frames status 392 * @priv: Private driver interface data 393 * @enabled: true = protect frames enabled 394 * false = protect frames disabled 395 * Returns: 0 on success, -1 on failure (or if not supported) 396 */ 397static int macsec_drv_enable_protect_frames(void *priv, bool enabled) 398{ 399 struct macsec_drv_data *drv = priv; 400 401 wpa_printf(MSG_DEBUG, "%s -> %s", __func__, enabled ? "TRUE" : "FALSE"); 402 403 drv->protect_frames_set = true; 404 drv->protect_frames = enabled; 405 406 return try_commit(drv); 407} 408 409 410/** 411 * macsec_drv_enable_encrypt - Set protect frames status 412 * @priv: Private driver interface data 413 * @enabled: true = protect frames enabled 414 * false = protect frames disabled 415 * Returns: 0 on success, -1 on failure (or if not supported) 416 */ 417static int macsec_drv_enable_encrypt(void *priv, bool enabled) 418{ 419 struct macsec_drv_data *drv = priv; 420 421 wpa_printf(MSG_DEBUG, "%s -> %s", __func__, enabled ? "TRUE" : "FALSE"); 422 423 drv->encrypt_set = true; 424 drv->encrypt = enabled; 425 426 return try_commit(drv); 427} 428 429 430/** 431 * macsec_drv_set_replay_protect - Set replay protect status and window size 432 * @priv: Private driver interface data 433 * @enabled: true = replay protect enabled 434 * false = replay protect disabled 435 * @window: replay window size, valid only when replay protect enabled 436 * Returns: 0 on success, -1 on failure (or if not supported) 437 */ 438static int macsec_drv_set_replay_protect(void *priv, bool enabled, 439 u32 window) 440{ 441 struct macsec_drv_data *drv = priv; 442 443 wpa_printf(MSG_DEBUG, "%s -> %s, %u", __func__, 444 enabled ? "TRUE" : "FALSE", window); 445 446 drv->replay_protect_set = true; 447 drv->replay_protect = enabled; 448 if (enabled) 449 drv->replay_window = window; 450 451 return try_commit(drv); 452} 453 454 455/** 456 * macsec_drv_set_current_cipher_suite - Set current cipher suite 457 * @priv: Private driver interface data 458 * @cs: EUI64 identifier 459 * Returns: 0 on success, -1 on failure (or if not supported) 460 */ 461static int macsec_drv_set_current_cipher_suite(void *priv, u64 cs) 462{ 463 wpa_printf(MSG_DEBUG, "%s -> %016" PRIx64, __func__, cs); 464 return 0; 465} 466 467 468/** 469 * macsec_drv_enable_controlled_port - Set controlled port status 470 * @priv: Private driver interface data 471 * @enabled: true = controlled port enabled 472 * false = controlled port disabled 473 * Returns: 0 on success, -1 on failure (or if not supported) 474 */ 475static int macsec_drv_enable_controlled_port(void *priv, bool enabled) 476{ 477 struct macsec_drv_data *drv = priv; 478 479 wpa_printf(MSG_DEBUG, "%s -> %s", __func__, enabled ? "TRUE" : "FALSE"); 480 481 drv->controlled_port_enabled = enabled; 482 drv->controlled_port_enabled_set = true; 483 484 return try_commit(drv); 485} 486 487 488static struct nla_policy sa_policy[MACSEC_SA_ATTR_MAX + 1] = { 489 [MACSEC_SA_ATTR_AN] = { .type = NLA_U8 }, 490 [MACSEC_SA_ATTR_ACTIVE] = { .type = NLA_U8 }, 491 [MACSEC_SA_ATTR_PN] = { .type = NLA_U32 }, 492 [MACSEC_SA_ATTR_KEYID] = { .type = NLA_BINARY }, 493}; 494 495static struct nla_policy sc_policy[MACSEC_RXSC_ATTR_MAX + 1] = { 496 [MACSEC_RXSC_ATTR_SCI] = { .type = NLA_U64 }, 497 [MACSEC_RXSC_ATTR_ACTIVE] = { .type = NLA_U8 }, 498 [MACSEC_RXSC_ATTR_SA_LIST] = { .type = NLA_NESTED }, 499}; 500 501static struct nla_policy main_policy[MACSEC_ATTR_MAX + 1] = { 502 [MACSEC_ATTR_IFINDEX] = { .type = NLA_U32 }, 503 [MACSEC_ATTR_SECY] = { .type = NLA_NESTED }, 504 [MACSEC_ATTR_TXSA_LIST] = { .type = NLA_NESTED }, 505 [MACSEC_ATTR_RXSC_LIST] = { .type = NLA_NESTED }, 506}; 507 508static int dump_callback(struct nl_msg *msg, void *argp) 509{ 510 struct nlmsghdr *ret_hdr = nlmsg_hdr(msg); 511 struct nlattr *tb_msg[MACSEC_ATTR_MAX + 1]; 512 struct cb_arg *arg = (struct cb_arg *) argp; 513 struct genlmsghdr *gnlh = (struct genlmsghdr *) nlmsg_data(ret_hdr); 514 int err; 515 516 if (ret_hdr->nlmsg_type != arg->drv->ctx.macsec_genl_id) 517 return 0; 518 519 err = nla_parse(tb_msg, MACSEC_ATTR_MAX, genlmsg_attrdata(gnlh, 0), 520 genlmsg_attrlen(gnlh, 0), main_policy); 521 if (err < 0) 522 return 0; 523 524 if (!tb_msg[MACSEC_ATTR_IFINDEX]) 525 return 0; 526 527 if (nla_get_u32(tb_msg[MACSEC_ATTR_IFINDEX]) != (u32) arg->ifindex) 528 return 0; 529 530 if (arg->txsa < 4 && !tb_msg[MACSEC_ATTR_TXSA_LIST]) { 531 return 0; 532 } else if (arg->txsa < 4) { 533 struct nlattr *nla; 534 int rem; 535 536 nla_for_each_nested(nla, tb_msg[MACSEC_ATTR_TXSA_LIST], rem) { 537 struct nlattr *tb[MACSEC_SA_ATTR_MAX + 1]; 538 539 err = nla_parse_nested(tb, MACSEC_SA_ATTR_MAX, nla, 540 sa_policy); 541 if (err < 0) 542 continue; 543 if (!tb[MACSEC_SA_ATTR_AN]) 544 continue; 545 if (nla_get_u8(tb[MACSEC_SA_ATTR_AN]) != arg->txsa) 546 continue; 547 if (!tb[MACSEC_SA_ATTR_PN]) 548 return 0; 549 *arg->pn = nla_get_u32(tb[MACSEC_SA_ATTR_PN]); 550 return 0; 551 } 552 553 return 0; 554 } 555 556 if (arg->rxsci == UNUSED_SCI) 557 return 0; 558 559 if (tb_msg[MACSEC_ATTR_RXSC_LIST]) { 560 struct nlattr *nla; 561 int rem; 562 563 nla_for_each_nested(nla, tb_msg[MACSEC_ATTR_RXSC_LIST], rem) { 564 struct nlattr *tb[MACSEC_RXSC_ATTR_MAX + 1]; 565 566 err = nla_parse_nested(tb, MACSEC_RXSC_ATTR_MAX, nla, 567 sc_policy); 568 if (err < 0) 569 return 0; 570 if (!tb[MACSEC_RXSC_ATTR_SCI]) 571 continue; 572 if (nla_get_u64(tb[MACSEC_RXSC_ATTR_SCI]) != arg->rxsci) 573 continue; 574 if (!tb[MACSEC_RXSC_ATTR_SA_LIST]) 575 return 0; 576 577 nla_for_each_nested(nla, tb[MACSEC_RXSC_ATTR_SA_LIST], 578 rem) { 579 struct nlattr *tb_sa[MACSEC_SA_ATTR_MAX + 1]; 580 581 err = nla_parse_nested(tb_sa, 582 MACSEC_SA_ATTR_MAX, nla, 583 sa_policy); 584 if (err < 0) 585 continue; 586 if (!tb_sa[MACSEC_SA_ATTR_AN]) 587 continue; 588 if (nla_get_u8(tb_sa[MACSEC_SA_ATTR_AN]) != 589 arg->rxsa) 590 continue; 591 if (!tb_sa[MACSEC_SA_ATTR_PN]) 592 return 0; 593 *arg->pn = 594 nla_get_u32(tb_sa[MACSEC_SA_ATTR_PN]); 595 596 return 0; 597 } 598 599 return 0; 600 } 601 602 return 0; 603 } 604 605 return 0; 606} 607 608 609static int nl_send_recv(struct nl_sock *sk, struct nl_msg *msg) 610{ 611 int ret; 612 613 ret = nl_send_auto_complete(sk, msg); 614 if (ret < 0) { 615 wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to send: %d (%s)", 616 __func__, ret, nl_geterror(-ret)); 617 return ret; 618 } 619 620 ret = nl_recvmsgs_default(sk); 621 if (ret < 0) { 622 wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to recv: %d (%s)", 623 __func__, ret, nl_geterror(-ret)); 624 } 625 626 return ret; 627} 628 629 630static int do_dump(struct macsec_drv_data *drv, u8 txsa, u64 rxsci, u8 rxsa, 631 u32 *pn) 632{ 633 struct macsec_genl_ctx *ctx = &drv->ctx; 634 struct nl_msg *msg; 635 int ret = 1; 636 637 ctx->cb_arg.ifindex = drv->ifi; 638 ctx->cb_arg.rxsci = rxsci; 639 ctx->cb_arg.rxsa = rxsa; 640 ctx->cb_arg.txsa = txsa; 641 ctx->cb_arg.pn = pn; 642 643 msg = nlmsg_alloc(); 644 if (!msg) { 645 wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to alloc message", 646 __func__); 647 return 1; 648 } 649 650 if (!genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, ctx->macsec_genl_id, 0, 651 NLM_F_DUMP, MACSEC_CMD_GET_TXSC, 0)) { 652 wpa_printf(MSG_ERROR, DRV_PREFIX "%s: failed to put header", 653 __func__); 654 goto out_free_msg; 655 } 656 657 ret = nl_send_recv(ctx->sk, msg); 658 if (ret < 0) 659 wpa_printf(MSG_ERROR, 660 DRV_PREFIX "failed to communicate: %d (%s)", 661 ret, nl_geterror(-ret)); 662 663 ctx->cb_arg.pn = NULL; 664 665out_free_msg: 666 nlmsg_free(msg); 667 return ret; 668} 669 670 671/** 672 * macsec_drv_get_receive_lowest_pn - Get receive lowest PN 673 * @priv: Private driver interface data 674 * @sa: secure association 675 * Returns: 0 on success, -1 on failure (or if not supported) 676 */ 677static int macsec_drv_get_receive_lowest_pn(void *priv, struct receive_sa *sa) 678{ 679 struct macsec_drv_data *drv = priv; 680 int err; 681 682 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s", __func__); 683 684 err = do_dump(drv, 0xff, mka_sci_u64(&sa->sc->sci), sa->an, 685 &sa->lowest_pn); 686 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: result %d", __func__, 687 sa->lowest_pn); 688 689 return err; 690} 691 692 693/** 694 * macsec_drv_set_receive_lowest_pn - Set receive lowest PN 695 * @priv: Private driver interface data 696 * @sa: secure association 697 * Returns: 0 on success, -1 on failure (or if not supported) 698 */ 699static int macsec_drv_set_receive_lowest_pn(void *priv, struct receive_sa *sa) 700{ 701 struct macsec_drv_data *drv = priv; 702 struct macsec_genl_ctx *ctx = &drv->ctx; 703 struct nl_msg *msg; 704 struct nlattr *nest; 705 int ret = -1; 706 707 wpa_printf(MSG_DEBUG, 708 DRV_PREFIX "%s: set_receive_lowest_pn -> %d: %d", 709 drv->ifname, sa->an, sa->next_pn); 710 711 msg = msg_prepare(MACSEC_CMD_UPD_RXSA, ctx, drv->ifi); 712 if (!msg) 713 return ret; 714 715 if (nla_put_rxsc_config(msg, mka_sci_u64(&sa->sc->sci))) 716 goto nla_put_failure; 717 718 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 719 if (!nest) 720 goto nla_put_failure; 721 722 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an); 723 NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn); 724 725 nla_nest_end(msg, nest); 726 727 ret = nl_send_recv(ctx->sk, msg); 728 if (ret < 0) { 729 wpa_printf(MSG_ERROR, 730 DRV_PREFIX "failed to communicate: %d (%s)", 731 ret, nl_geterror(-ret)); 732 } 733 734nla_put_failure: 735 nlmsg_free(msg); 736 return ret; 737} 738 739 740/** 741 * macsec_drv_get_transmit_next_pn - Get transmit next PN 742 * @priv: Private driver interface data 743 * @sa: secure association 744 * Returns: 0 on success, -1 on failure (or if not supported) 745 */ 746static int macsec_drv_get_transmit_next_pn(void *priv, struct transmit_sa *sa) 747{ 748 struct macsec_drv_data *drv = priv; 749 int err; 750 751 wpa_printf(MSG_DEBUG, "%s", __func__); 752 753 err = do_dump(drv, sa->an, UNUSED_SCI, 0xff, &sa->next_pn); 754 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: err %d result %d", __func__, err, 755 sa->next_pn); 756 return err; 757} 758 759 760/** 761 * macsec_drv_set_transmit_next_pn - Set transmit next pn 762 * @priv: Private driver interface data 763 * @sa: secure association 764 * Returns: 0 on success, -1 on failure (or if not supported) 765 */ 766static int macsec_drv_set_transmit_next_pn(void *priv, struct transmit_sa *sa) 767{ 768 struct macsec_drv_data *drv = priv; 769 struct macsec_genl_ctx *ctx = &drv->ctx; 770 struct nl_msg *msg; 771 struct nlattr *nest; 772 int ret = -1; 773 774 wpa_printf(MSG_DEBUG, "%s -> %d: %d", __func__, sa->an, sa->next_pn); 775 776 msg = msg_prepare(MACSEC_CMD_UPD_TXSA, ctx, drv->ifi); 777 if (!msg) 778 return ret; 779 780 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 781 if (!nest) 782 goto nla_put_failure; 783 784 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an); 785 NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn); 786 787 nla_nest_end(msg, nest); 788 789 ret = nl_send_recv(ctx->sk, msg); 790 if (ret < 0) { 791 wpa_printf(MSG_ERROR, 792 DRV_PREFIX "failed to communicate: %d (%s)", 793 ret, nl_geterror(-ret)); 794 } 795 796nla_put_failure: 797 nlmsg_free(msg); 798 return ret; 799} 800 801 802#define SCISTR MACSTR "::%hx" 803#define SCI2STR(addr, port) MAC2STR(addr), htons(port) 804 805/** 806 * macsec_drv_create_receive_sc - Create secure channel for receiving 807 * @priv: Private driver interface data 808 * @sc: secure channel 809 * @sci_addr: secure channel identifier - address 810 * @sci_port: secure channel identifier - port 811 * @conf_offset: confidentiality offset (0, 30, or 50) 812 * @validation: frame validation policy (0 = Disabled, 1 = Checked, 813 * 2 = Strict) 814 * Returns: 0 on success, -1 on failure (or if not supported) 815 */ 816static int macsec_drv_create_receive_sc(void *priv, struct receive_sc *sc, 817 unsigned int conf_offset, 818 int validation) 819{ 820 struct macsec_drv_data *drv = priv; 821 struct macsec_genl_ctx *ctx = &drv->ctx; 822 struct nl_msg *msg; 823 int ret = -1; 824 825 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: create_receive_sc -> " SCISTR 826 " (conf_offset=%u validation=%d)", 827 drv->ifname, SCI2STR(sc->sci.addr, sc->sci.port), 828 conf_offset, validation); 829 830 msg = msg_prepare(MACSEC_CMD_ADD_RXSC, ctx, drv->ifi); 831 if (!msg) 832 return ret; 833 834 if (nla_put_rxsc_config(msg, mka_sci_u64(&sc->sci))) 835 goto nla_put_failure; 836 837 ret = nl_send_recv(ctx->sk, msg); 838 if (ret < 0) { 839 wpa_printf(MSG_ERROR, 840 DRV_PREFIX "%s: failed to communicate: %d (%s)", 841 __func__, ret, nl_geterror(-ret)); 842 } 843 844nla_put_failure: 845 nlmsg_free(msg); 846 return ret; 847} 848 849 850/** 851 * macsec_drv_delete_receive_sc - Delete secure connection for receiving 852 * @priv: private driver interface data from init() 853 * @sc: secure channel 854 * Returns: 0 on success, -1 on failure 855 */ 856static int macsec_drv_delete_receive_sc(void *priv, struct receive_sc *sc) 857{ 858 struct macsec_drv_data *drv = priv; 859 struct macsec_genl_ctx *ctx = &drv->ctx; 860 struct nl_msg *msg; 861 int ret = -1; 862 863 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_receive_sc -> " SCISTR, 864 drv->ifname, SCI2STR(sc->sci.addr, sc->sci.port)); 865 866 msg = msg_prepare(MACSEC_CMD_DEL_RXSC, ctx, drv->ifi); 867 if (!msg) 868 return ret; 869 870 if (nla_put_rxsc_config(msg, mka_sci_u64(&sc->sci))) 871 goto nla_put_failure; 872 873 ret = nl_send_recv(ctx->sk, msg); 874 if (ret < 0) { 875 wpa_printf(MSG_ERROR, 876 DRV_PREFIX "%s: failed to communicate: %d (%s)", 877 __func__, ret, nl_geterror(-ret)); 878 } 879 880nla_put_failure: 881 nlmsg_free(msg); 882 return ret; 883} 884 885 886/** 887 * macsec_drv_create_receive_sa - Create secure association for receive 888 * @priv: private driver interface data from init() 889 * @sa: secure association 890 * Returns: 0 on success, -1 on failure 891 */ 892static int macsec_drv_create_receive_sa(void *priv, struct receive_sa *sa) 893{ 894 struct macsec_drv_data *drv = priv; 895 struct macsec_genl_ctx *ctx = &drv->ctx; 896 struct nl_msg *msg; 897 struct nlattr *nest; 898 int ret = -1; 899 900 wpa_printf(MSG_DEBUG, 901 DRV_PREFIX "%s: create_receive_sa -> %d on " SCISTR 902 " (enable_receive=%d next_pn=%u)", 903 drv->ifname, sa->an, 904 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port), 905 sa->enable_receive, sa->next_pn); 906 wpa_hexdump(MSG_DEBUG, DRV_PREFIX "SA keyid", 907 &sa->pkey->key_identifier, 908 sizeof(sa->pkey->key_identifier)); 909 wpa_hexdump_key(MSG_DEBUG, DRV_PREFIX "SA key", 910 sa->pkey->key, sa->pkey->key_len); 911 912 msg = msg_prepare(MACSEC_CMD_ADD_RXSA, ctx, drv->ifi); 913 if (!msg) 914 return ret; 915 916 if (nla_put_rxsc_config(msg, mka_sci_u64(&sa->sc->sci))) 917 goto nla_put_failure; 918 919 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 920 if (!nest) 921 goto nla_put_failure; 922 923 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an); 924 NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, sa->enable_receive); 925 NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn); 926 NLA_PUT(msg, MACSEC_SA_ATTR_KEYID, sizeof(sa->pkey->key_identifier), 927 &sa->pkey->key_identifier); 928 NLA_PUT(msg, MACSEC_SA_ATTR_KEY, sa->pkey->key_len, sa->pkey->key); 929 930 nla_nest_end(msg, nest); 931 932 ret = nl_send_recv(ctx->sk, msg); 933 if (ret < 0) { 934 wpa_printf(MSG_ERROR, 935 DRV_PREFIX "%s: failed to communicate: %d (%s)", 936 __func__, ret, nl_geterror(-ret)); 937 } 938 939nla_put_failure: 940 nlmsg_free(msg); 941 return ret; 942} 943 944 945/** 946 * macsec_drv_delete_receive_sa - Delete secure association for receive 947 * @priv: private driver interface data from init() 948 * @sa: secure association 949 * Returns: 0 on success, -1 on failure 950 */ 951static int macsec_drv_delete_receive_sa(void *priv, struct receive_sa *sa) 952{ 953 struct macsec_drv_data *drv = priv; 954 struct macsec_genl_ctx *ctx = &drv->ctx; 955 struct nl_msg *msg; 956 struct nlattr *nest; 957 int ret = -1; 958 959 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_receive_sa -> %d on " 960 SCISTR, drv->ifname, sa->an, 961 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port)); 962 963 msg = msg_prepare(MACSEC_CMD_DEL_RXSA, ctx, drv->ifi); 964 if (!msg) 965 return ret; 966 967 if (nla_put_rxsc_config(msg, mka_sci_u64(&sa->sc->sci))) 968 goto nla_put_failure; 969 970 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 971 if (!nest) 972 goto nla_put_failure; 973 974 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an); 975 976 nla_nest_end(msg, nest); 977 978 ret = nl_send_recv(ctx->sk, msg); 979 if (ret < 0) { 980 wpa_printf(MSG_ERROR, 981 DRV_PREFIX "%s: failed to communicate: %d (%s)", 982 __func__, ret, nl_geterror(-ret)); 983 } 984 985nla_put_failure: 986 nlmsg_free(msg); 987 return ret; 988} 989 990 991static int set_active_rx_sa(const struct macsec_genl_ctx *ctx, int ifindex, 992 u64 sci, unsigned char an, bool state) 993{ 994 struct nl_msg *msg; 995 struct nlattr *nest; 996 int ret = -1; 997 998 msg = msg_prepare(MACSEC_CMD_UPD_RXSA, ctx, ifindex); 999 if (!msg) 1000 return ret; 1001 1002 if (nla_put_rxsc_config(msg, sci)) 1003 goto nla_put_failure; 1004 1005 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 1006 if (!nest) 1007 goto nla_put_failure; 1008 1009 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, an); 1010 NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, !!state); 1011 1012 nla_nest_end(msg, nest); 1013 1014 ret = nl_send_recv(ctx->sk, msg); 1015 if (ret < 0) 1016 wpa_printf(MSG_ERROR, 1017 DRV_PREFIX "%s: failed to communicate: %d (%s)", 1018 __func__, ret, nl_geterror(-ret)); 1019 1020nla_put_failure: 1021 nlmsg_free(msg); 1022 return ret; 1023} 1024 1025 1026/** 1027 * macsec_drv_enable_receive_sa - Enable the SA for receive 1028 * @priv: private driver interface data from init() 1029 * @sa: secure association 1030 * Returns: 0 on success, -1 on failure 1031 */ 1032static int macsec_drv_enable_receive_sa(void *priv, struct receive_sa *sa) 1033{ 1034 struct macsec_drv_data *drv = priv; 1035 struct macsec_genl_ctx *ctx = &drv->ctx; 1036 1037 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: enable_receive_sa -> %d on " 1038 SCISTR, drv->ifname, sa->an, 1039 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port)); 1040 1041 return set_active_rx_sa(ctx, drv->ifi, mka_sci_u64(&sa->sc->sci), 1042 sa->an, true); 1043} 1044 1045 1046/** 1047 * macsec_drv_disable_receive_sa - Disable SA for receive 1048 * @priv: private driver interface data from init() 1049 * @sa: secure association 1050 * Returns: 0 on success, -1 on failure 1051 */ 1052static int macsec_drv_disable_receive_sa(void *priv, struct receive_sa *sa) 1053{ 1054 struct macsec_drv_data *drv = priv; 1055 struct macsec_genl_ctx *ctx = &drv->ctx; 1056 1057 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: disable_receive_sa -> %d on " 1058 SCISTR, drv->ifname, sa->an, 1059 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port)); 1060 1061 return set_active_rx_sa(ctx, drv->ifi, mka_sci_u64(&sa->sc->sci), 1062 sa->an, false); 1063} 1064 1065 1066static struct rtnl_link * lookup_sc(struct nl_cache *cache, int parent, u64 sci) 1067{ 1068 struct rtnl_link *needle; 1069 void *match; 1070 1071 needle = rtnl_link_macsec_alloc(); 1072 if (!needle) 1073 return NULL; 1074 1075 rtnl_link_set_link(needle, parent); 1076 rtnl_link_macsec_set_sci(needle, sci); 1077 1078 match = nl_cache_find(cache, (struct nl_object *) needle); 1079 rtnl_link_put(needle); 1080 1081 return (struct rtnl_link *) match; 1082} 1083 1084 1085/** 1086 * macsec_drv_create_transmit_sc - Create secure connection for transmit 1087 * @priv: private driver interface data from init() 1088 * @sc: secure channel 1089 * @conf_offset: confidentiality offset 1090 * Returns: 0 on success, -1 on failure 1091 */ 1092static int macsec_drv_create_transmit_sc( 1093 void *priv, struct transmit_sc *sc, 1094 unsigned int conf_offset) 1095{ 1096 struct macsec_drv_data *drv = priv; 1097 struct rtnl_link *link; 1098 char *ifname; 1099 u64 sci; 1100 int err; 1101 1102 wpa_printf(MSG_DEBUG, DRV_PREFIX 1103 "%s: create_transmit_sc -> " SCISTR " (conf_offset=%d)", 1104 drv->common.ifname, SCI2STR(sc->sci.addr, sc->sci.port), 1105 conf_offset); 1106 1107 if (!drv->sk) { 1108 wpa_printf(MSG_ERROR, DRV_PREFIX "NULL rtnl socket"); 1109 return -1; 1110 } 1111 1112 link = rtnl_link_macsec_alloc(); 1113 if (!link) { 1114 wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't allocate link"); 1115 return -1; 1116 } 1117 1118 rtnl_link_set_link(link, drv->parent_ifi); 1119 1120 sci = mka_sci_u64(&sc->sci); 1121 rtnl_link_macsec_set_sci(link, sci); 1122 1123 drv->created_link = true; 1124 1125 err = rtnl_link_add(drv->sk, link, NLM_F_CREATE); 1126 if (err == -NLE_BUSY) { 1127 wpa_printf(MSG_INFO, 1128 DRV_PREFIX "link already exists, using it"); 1129 drv->created_link = false; 1130 } else if (err < 0) { 1131 rtnl_link_put(link); 1132 wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't create link: err %d", 1133 err); 1134 return err; 1135 } 1136 1137 rtnl_link_put(link); 1138 1139 nl_cache_refill(drv->sk, drv->link_cache); 1140 link = lookup_sc(drv->link_cache, drv->parent_ifi, sci); 1141 if (!link) { 1142 wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't find link"); 1143 return -1; 1144 } 1145 1146 drv->ifi = rtnl_link_get_ifindex(link); 1147 ifname = rtnl_link_get_name(link); 1148 wpa_printf(MSG_DEBUG, 1149 DRV_PREFIX "%s: create_transmit_sc: ifi=%d ifname=%s", 1150 drv->common.ifname, drv->ifi, ifname); 1151 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)); 1152 rtnl_link_put(link); 1153 1154 drv->link = rtnl_link_macsec_alloc(); 1155 if (!drv->link) { 1156 wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't allocate link"); 1157 return -1; 1158 } 1159 1160 rtnl_link_set_name(drv->link, drv->ifname); 1161 1162 /* In case some settings have already been done but we couldn't apply 1163 * them. */ 1164 return try_commit(drv); 1165} 1166 1167 1168/** 1169 * macsec_drv_delete_transmit_sc - Delete secure connection for transmit 1170 * @priv: private driver interface data from init() 1171 * @sc: secure channel 1172 * Returns: 0 on success, -1 on failure 1173 */ 1174static int macsec_drv_delete_transmit_sc(void *priv, struct transmit_sc *sc) 1175{ 1176 struct macsec_drv_data *drv = priv; 1177 int err; 1178 1179 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_transmit_sc -> " SCISTR, 1180 drv->ifname, SCI2STR(sc->sci.addr, sc->sci.port)); 1181 1182 if (!drv->sk) 1183 return 0; 1184 1185 if (!drv->created_link) { 1186 rtnl_link_put(drv->link); 1187 drv->link = NULL; 1188 wpa_printf(MSG_DEBUG, DRV_PREFIX 1189 "we didn't create the link, leave it alone"); 1190 return 0; 1191 } 1192 1193 err = rtnl_link_delete(drv->sk, drv->link); 1194 if (err < 0) 1195 wpa_printf(MSG_ERROR, DRV_PREFIX "couldn't delete link"); 1196 rtnl_link_put(drv->link); 1197 drv->link = NULL; 1198 1199 return err; 1200} 1201 1202 1203/** 1204 * macsec_drv_create_transmit_sa - Create secure association for transmit 1205 * @priv: private driver interface data from init() 1206 * @sa: secure association 1207 * Returns: 0 on success, -1 on failure 1208 */ 1209static int macsec_drv_create_transmit_sa(void *priv, struct transmit_sa *sa) 1210{ 1211 struct macsec_drv_data *drv = priv; 1212 struct macsec_genl_ctx *ctx = &drv->ctx; 1213 struct nl_msg *msg; 1214 struct nlattr *nest; 1215 int ret = -1; 1216 1217 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: create_transmit_sa -> %d on " 1218 SCISTR " (enable_transmit=%d next_pn=%u)", 1219 drv->ifname, sa->an, 1220 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port), 1221 sa->enable_transmit, sa->next_pn); 1222 wpa_hexdump(MSG_DEBUG, DRV_PREFIX "SA keyid", 1223 &sa->pkey->key_identifier, 1224 sizeof(sa->pkey->key_identifier)); 1225 wpa_hexdump_key(MSG_DEBUG, DRV_PREFIX "SA key", 1226 sa->pkey->key, sa->pkey->key_len); 1227 1228 msg = msg_prepare(MACSEC_CMD_ADD_TXSA, ctx, drv->ifi); 1229 if (!msg) 1230 return ret; 1231 1232 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 1233 if (!nest) 1234 goto nla_put_failure; 1235 1236 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an); 1237 NLA_PUT_U32(msg, MACSEC_SA_ATTR_PN, sa->next_pn); 1238 NLA_PUT(msg, MACSEC_SA_ATTR_KEYID, sizeof(sa->pkey->key_identifier), 1239 &sa->pkey->key_identifier); 1240 NLA_PUT(msg, MACSEC_SA_ATTR_KEY, sa->pkey->key_len, sa->pkey->key); 1241 NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, sa->enable_transmit); 1242 1243 nla_nest_end(msg, nest); 1244 1245 ret = nl_send_recv(ctx->sk, msg); 1246 if (ret < 0) { 1247 wpa_printf(MSG_ERROR, 1248 DRV_PREFIX "%s: failed to communicate: %d (%s)", 1249 __func__, ret, nl_geterror(-ret)); 1250 } 1251 1252nla_put_failure: 1253 nlmsg_free(msg); 1254 return ret; 1255} 1256 1257 1258/** 1259 * macsec_drv_delete_transmit_sa - Delete secure association for transmit 1260 * @priv: private driver interface data from init() 1261 * @sa: secure association 1262 * Returns: 0 on success, -1 on failure 1263 */ 1264static int macsec_drv_delete_transmit_sa(void *priv, struct transmit_sa *sa) 1265{ 1266 struct macsec_drv_data *drv = priv; 1267 struct macsec_genl_ctx *ctx = &drv->ctx; 1268 struct nl_msg *msg; 1269 struct nlattr *nest; 1270 int ret = -1; 1271 1272 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: delete_transmit_sa -> %d on " 1273 SCISTR, drv->ifname, sa->an, 1274 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port)); 1275 1276 msg = msg_prepare(MACSEC_CMD_DEL_TXSA, ctx, drv->ifi); 1277 if (!msg) 1278 return ret; 1279 1280 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 1281 if (!nest) 1282 goto nla_put_failure; 1283 1284 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, sa->an); 1285 1286 nla_nest_end(msg, nest); 1287 1288 ret = nl_send_recv(ctx->sk, msg); 1289 if (ret < 0) { 1290 wpa_printf(MSG_ERROR, 1291 DRV_PREFIX "%s: failed to communicate: %d (%s)", 1292 __func__, ret, nl_geterror(-ret)); 1293 } 1294 1295nla_put_failure: 1296 nlmsg_free(msg); 1297 return ret; 1298} 1299 1300 1301static int set_active_tx_sa(const struct macsec_genl_ctx *ctx, int ifindex, 1302 unsigned char an, bool state) 1303{ 1304 struct nl_msg *msg; 1305 struct nlattr *nest; 1306 int ret = -1; 1307 1308 msg = msg_prepare(MACSEC_CMD_UPD_TXSA, ctx, ifindex); 1309 if (!msg) 1310 return ret; 1311 1312 nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG); 1313 if (!nest) 1314 goto nla_put_failure; 1315 1316 NLA_PUT_U8(msg, MACSEC_SA_ATTR_AN, an); 1317 NLA_PUT_U8(msg, MACSEC_SA_ATTR_ACTIVE, !!state); 1318 1319 nla_nest_end(msg, nest); 1320 1321 ret = nl_send_recv(ctx->sk, msg); 1322 if (ret < 0) { 1323 wpa_printf(MSG_ERROR, 1324 DRV_PREFIX "%s: failed to communicate: %d (%s)", 1325 __func__, ret, nl_geterror(-ret)); 1326 } 1327 1328nla_put_failure: 1329 nlmsg_free(msg); 1330 return ret; 1331} 1332 1333 1334/** 1335 * macsec_drv_enable_transmit_sa - Enable SA for transmit 1336 * @priv: private driver interface data from init() 1337 * @sa: secure association 1338 * Returns: 0 on success, -1 on failure 1339 */ 1340static int macsec_drv_enable_transmit_sa(void *priv, struct transmit_sa *sa) 1341{ 1342 struct macsec_drv_data *drv = priv; 1343 struct macsec_genl_ctx *ctx = &drv->ctx; 1344 int ret; 1345 1346 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: enable_transmit_sa -> %d on " 1347 SCISTR, drv->ifname, sa->an, 1348 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port)); 1349 1350 ret = set_active_tx_sa(ctx, drv->ifi, sa->an, true); 1351 if (ret < 0) { 1352 wpa_printf(MSG_ERROR, DRV_PREFIX "failed to enable txsa"); 1353 return ret; 1354 } 1355 1356 drv->encoding_sa_set = true; 1357 drv->encoding_sa = sa->an; 1358 1359 return try_commit(drv); 1360} 1361 1362 1363/** 1364 * macsec_drv_disable_transmit_sa - Disable SA for transmit 1365 * @priv: private driver interface data from init() 1366 * @sa: secure association 1367 * Returns: 0 on success, -1 on failure 1368 */ 1369static int macsec_drv_disable_transmit_sa(void *priv, struct transmit_sa *sa) 1370{ 1371 struct macsec_drv_data *drv = priv; 1372 struct macsec_genl_ctx *ctx = &drv->ctx; 1373 1374 wpa_printf(MSG_DEBUG, DRV_PREFIX "%s: disable_transmit_sa -> %d on " 1375 SCISTR, drv->ifname, sa->an, 1376 SCI2STR(sa->sc->sci.addr, sa->sc->sci.port)); 1377 1378 return set_active_tx_sa(ctx, drv->ifi, sa->an, false); 1379} 1380 1381 1382static int macsec_drv_status(void *priv, char *buf, size_t buflen) 1383{ 1384 struct macsec_drv_data *drv = priv; 1385 int res; 1386 char *pos, *end; 1387 1388 pos = buf; 1389 end = buf + buflen; 1390 1391 res = os_snprintf(pos, end - pos, 1392 "ifname=%s\n" 1393 "ifi=%d\n" 1394 "parent_ifname=%s\n" 1395 "parent_ifi=%d\n", 1396 drv->common.ifname, drv->ifi, 1397 drv->ifname, drv->parent_ifi); 1398 if (os_snprintf_error(end - pos, res)) 1399 return pos - buf; 1400 pos += res; 1401 1402 return pos - buf; 1403} 1404 1405 1406#ifdef __linux__ 1407 1408static void macsec_drv_handle_data(void *ctx, unsigned char *buf, size_t len) 1409{ 1410#ifdef HOSTAPD 1411 struct ieee8023_hdr *hdr; 1412 u8 *pos, *sa; 1413 size_t left; 1414 union wpa_event_data event; 1415 1416 /* must contain at least ieee8023_hdr 6 byte source, 6 byte dest, 1417 * 2 byte ethertype */ 1418 if (len < 14) { 1419 wpa_printf(MSG_MSGDUMP, "%s: too short (%lu)", 1420 __func__, (unsigned long) len); 1421 return; 1422 } 1423 1424 hdr = (struct ieee8023_hdr *) buf; 1425 1426 switch (ntohs(hdr->ethertype)) { 1427 case ETH_P_PAE: 1428 wpa_printf(MSG_MSGDUMP, "Received EAPOL packet"); 1429 sa = hdr->src; 1430 os_memset(&event, 0, sizeof(event)); 1431 event.new_sta.addr = sa; 1432 wpa_supplicant_event(ctx, EVENT_NEW_STA, &event); 1433 1434 pos = (u8 *) (hdr + 1); 1435 left = len - sizeof(*hdr); 1436 drv_event_eapol_rx(ctx, sa, pos, left); 1437 break; 1438 1439 default: 1440 wpa_printf(MSG_DEBUG, "Unknown ethertype 0x%04x in data frame", 1441 ntohs(hdr->ethertype)); 1442 break; 1443 } 1444#endif /* HOSTAPD */ 1445} 1446 1447 1448static void macsec_drv_handle_read(int sock, void *eloop_ctx, void *sock_ctx) 1449{ 1450 int len; 1451 unsigned char buf[3000]; 1452 1453 len = recv(sock, buf, sizeof(buf), 0); 1454 if (len < 0) { 1455 wpa_printf(MSG_ERROR, "macsec_linux: recv: %s", 1456 strerror(errno)); 1457 return; 1458 } 1459 1460 macsec_drv_handle_data(eloop_ctx, buf, len); 1461} 1462 1463#endif /* __linux__ */ 1464 1465 1466static int macsec_drv_init_sockets(struct macsec_drv_data *drv, u8 *own_addr) 1467{ 1468#ifdef __linux__ 1469 struct ifreq ifr; 1470 struct sockaddr_ll addr; 1471 1472 drv->common.sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_PAE)); 1473 if (drv->common.sock < 0) { 1474 wpa_printf(MSG_ERROR, "socket[PF_PACKET,SOCK_RAW]: %s", 1475 strerror(errno)); 1476 return -1; 1477 } 1478 1479 if (eloop_register_read_sock(drv->common.sock, macsec_drv_handle_read, 1480 drv->common.ctx, NULL)) { 1481 wpa_printf(MSG_INFO, "Could not register read socket"); 1482 return -1; 1483 } 1484 1485 os_memset(&ifr, 0, sizeof(ifr)); 1486 os_strlcpy(ifr.ifr_name, drv->common.ifname, sizeof(ifr.ifr_name)); 1487 if (ioctl(drv->common.sock, SIOCGIFINDEX, &ifr) != 0) { 1488 wpa_printf(MSG_ERROR, "ioctl(SIOCGIFINDEX): %s", 1489 strerror(errno)); 1490 return -1; 1491 } 1492 1493 os_memset(&addr, 0, sizeof(addr)); 1494 addr.sll_family = AF_PACKET; 1495 addr.sll_ifindex = ifr.ifr_ifindex; 1496 wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d", 1497 addr.sll_ifindex); 1498 1499 if (bind(drv->common.sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) 1500 { 1501 wpa_printf(MSG_ERROR, "bind: %s", strerror(errno)); 1502 return -1; 1503 } 1504 1505 /* filter multicast address */ 1506 if (wired_multicast_membership(drv->common.sock, ifr.ifr_ifindex, 1507 pae_group_addr, 1) < 0) { 1508 wpa_printf(MSG_ERROR, "wired: Failed to add multicast group " 1509 "membership"); 1510 return -1; 1511 } 1512 1513 os_memset(&ifr, 0, sizeof(ifr)); 1514 os_strlcpy(ifr.ifr_name, drv->common.ifname, sizeof(ifr.ifr_name)); 1515 if (ioctl(drv->common.sock, SIOCGIFHWADDR, &ifr) != 0) { 1516 wpa_printf(MSG_ERROR, "ioctl(SIOCGIFHWADDR): %s", 1517 strerror(errno)); 1518 return -1; 1519 } 1520 1521 if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) { 1522 wpa_printf(MSG_INFO, "Invalid HW-addr family 0x%04x", 1523 ifr.ifr_hwaddr.sa_family); 1524 return -1; 1525 } 1526 os_memcpy(own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN); 1527 1528 return 0; 1529#else /* __linux__ */ 1530 return -1; 1531#endif /* __linux__ */ 1532} 1533 1534 1535static void * macsec_drv_hapd_init(struct hostapd_data *hapd, 1536 struct wpa_init_params *params) 1537{ 1538 struct macsec_drv_data *drv; 1539 1540 drv = os_zalloc(sizeof(struct macsec_drv_data)); 1541 if (drv == NULL) { 1542 wpa_printf(MSG_INFO, 1543 "Could not allocate memory for wired driver data"); 1544 return NULL; 1545 } 1546 1547 drv->common.ctx = hapd; 1548 os_strlcpy(drv->common.ifname, params->ifname, 1549 sizeof(drv->common.ifname)); 1550 drv->use_pae_group_addr = params->use_pae_group_addr; 1551 1552 if (macsec_drv_init_sockets(drv, params->own_addr)) { 1553 os_free(drv); 1554 return NULL; 1555 } 1556 1557 return drv; 1558} 1559 1560 1561static void macsec_drv_hapd_deinit(void *priv) 1562{ 1563 struct macsec_drv_data *drv = priv; 1564 1565 if (drv->common.sock >= 0) { 1566 eloop_unregister_read_sock(drv->common.sock); 1567 close(drv->common.sock); 1568 } 1569 1570 os_free(drv); 1571} 1572 1573 1574static int macsec_drv_send_eapol(void *priv, const u8 *addr, 1575 const u8 *data, size_t data_len, int encrypt, 1576 const u8 *own_addr, u32 flags) 1577{ 1578 struct macsec_drv_data *drv = priv; 1579 struct ieee8023_hdr *hdr; 1580 size_t len; 1581 u8 *pos; 1582 int res; 1583 1584 len = sizeof(*hdr) + data_len; 1585 hdr = os_zalloc(len); 1586 if (hdr == NULL) { 1587 wpa_printf(MSG_INFO, 1588 "%s: malloc() failed (len=%lu)", 1589 __func__, (unsigned long) len); 1590 return -1; 1591 } 1592 1593 os_memcpy(hdr->dest, drv->use_pae_group_addr ? pae_group_addr : addr, 1594 ETH_ALEN); 1595 os_memcpy(hdr->src, own_addr, ETH_ALEN); 1596 hdr->ethertype = htons(ETH_P_PAE); 1597 1598 pos = (u8 *) (hdr + 1); 1599 os_memcpy(pos, data, data_len); 1600 1601 res = send(drv->common.sock, (u8 *) hdr, len, 0); 1602 os_free(hdr); 1603 1604 if (res < 0) { 1605 wpa_printf(MSG_ERROR, 1606 "%s: packet len: %lu - failed: send: %s", 1607 __func__, (unsigned long) len, strerror(errno)); 1608 } 1609 1610 return res; 1611} 1612 1613 1614const struct wpa_driver_ops wpa_driver_macsec_linux_ops = { 1615 .name = "macsec_linux", 1616 .desc = "MACsec Ethernet driver for Linux", 1617 .get_ssid = driver_wired_get_ssid, 1618 .get_bssid = driver_wired_get_bssid, 1619 .get_capa = driver_wired_get_capa, 1620 .init = macsec_drv_wpa_init, 1621 .deinit = macsec_drv_wpa_deinit, 1622 .hapd_init = macsec_drv_hapd_init, 1623 .hapd_deinit = macsec_drv_hapd_deinit, 1624 .hapd_send_eapol = macsec_drv_send_eapol, 1625 1626 .macsec_init = macsec_drv_macsec_init, 1627 .macsec_deinit = macsec_drv_macsec_deinit, 1628 .macsec_get_capability = macsec_drv_get_capability, 1629 .enable_protect_frames = macsec_drv_enable_protect_frames, 1630 .enable_encrypt = macsec_drv_enable_encrypt, 1631 .set_replay_protect = macsec_drv_set_replay_protect, 1632 .set_current_cipher_suite = macsec_drv_set_current_cipher_suite, 1633 .enable_controlled_port = macsec_drv_enable_controlled_port, 1634 .get_receive_lowest_pn = macsec_drv_get_receive_lowest_pn, 1635 .set_receive_lowest_pn = macsec_drv_set_receive_lowest_pn, 1636 .get_transmit_next_pn = macsec_drv_get_transmit_next_pn, 1637 .set_transmit_next_pn = macsec_drv_set_transmit_next_pn, 1638 .create_receive_sc = macsec_drv_create_receive_sc, 1639 .delete_receive_sc = macsec_drv_delete_receive_sc, 1640 .create_receive_sa = macsec_drv_create_receive_sa, 1641 .delete_receive_sa = macsec_drv_delete_receive_sa, 1642 .enable_receive_sa = macsec_drv_enable_receive_sa, 1643 .disable_receive_sa = macsec_drv_disable_receive_sa, 1644 .create_transmit_sc = macsec_drv_create_transmit_sc, 1645 .delete_transmit_sc = macsec_drv_delete_transmit_sc, 1646 .create_transmit_sa = macsec_drv_create_transmit_sa, 1647 .delete_transmit_sa = macsec_drv_delete_transmit_sa, 1648 .enable_transmit_sa = macsec_drv_enable_transmit_sa, 1649 .disable_transmit_sa = macsec_drv_disable_transmit_sa, 1650 1651 .status = macsec_drv_status, 1652}; 1653