1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * IEEE802154.4 socket interface 4 * 5 * Copyright 2007, 2008 Siemens AG 6 * 7 * Written by: 8 * Sergey Lapin <slapin@ossfans.org> 9 * Maxim Gorbachyov <maxim.gorbachev@siemens.com> 10 */ 11 12 #include <linux/net.h> 13 #include <linux/capability.h> 14 #include <linux/module.h> 15 #include <linux/if_arp.h> 16 #include <linux/if.h> 17 #include <linux/termios.h> /* For TIOCOUTQ/INQ */ 18 #include <linux/list.h> 19 #include <linux/slab.h> 20 #include <linux/socket.h> 21 #include <net/datalink.h> 22 #include <net/psnap.h> 23 #include <net/sock.h> 24 #include <net/tcp_states.h> 25 #include <net/route.h> 26 27 #include <net/af_ieee802154.h> 28 #include <net/ieee802154_netdev.h> 29 30 /* Utility function for families */ 31 static struct net_device* 32 ieee802154_get_dev(struct net *net, const struct ieee802154_addr *addr) 33 { 34 struct net_device *dev = NULL; 35 struct net_device *tmp; 36 __le16 pan_id, short_addr; 37 u8 hwaddr[IEEE802154_ADDR_LEN]; 38 39 switch (addr->mode) { 40 case IEEE802154_ADDR_LONG: 41 ieee802154_devaddr_to_raw(hwaddr, addr->extended_addr); 42 rcu_read_lock(); 43 dev = dev_getbyhwaddr_rcu(net, ARPHRD_IEEE802154, hwaddr); 44 dev_hold(dev); 45 rcu_read_unlock(); 46 break; 47 case IEEE802154_ADDR_SHORT: 48 if (addr->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST) || 49 addr->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || 50 addr->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) 51 break; 52 53 rtnl_lock(); 54 55 for_each_netdev(net, tmp) { 56 if (tmp->type != ARPHRD_IEEE802154) 57 continue; 58 59 pan_id = tmp->ieee802154_ptr->pan_id; 60 short_addr = tmp->ieee802154_ptr->short_addr; 61 if (pan_id == addr->pan_id && 62 short_addr == addr->short_addr) { 63 dev = tmp; 64 dev_hold(dev); 65 break; 66 } 67 } 68 69 rtnl_unlock(); 70 break; 71 default: 72 pr_warn("Unsupported ieee802154 address type: %d\n", 73 addr->mode); 74 break; 75 } 76 77 return dev; 78 } 79 80 static int ieee802154_sock_release(struct socket *sock) 81 { 82 struct sock *sk = sock->sk; 83 84 if (sk) { 85 sock->sk = NULL; 86 sk->sk_prot->close(sk, 0); 87 } 88 return 0; 89 } 90 91 static int ieee802154_sock_sendmsg(struct socket *sock, struct msghdr *msg, 92 size_t len) 93 { 94 struct sock *sk = sock->sk; 95 96 return sk->sk_prot->sendmsg(sk, msg, len); 97 } 98 99 static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr, 100 int addr_len) 101 { 102 struct sock *sk = sock->sk; 103 104 if (sk->sk_prot->bind) 105 return sk->sk_prot->bind(sk, uaddr, addr_len); 106 107 return sock_no_bind(sock, uaddr, addr_len); 108 } 109 110 static int ieee802154_sock_connect(struct socket *sock, struct sockaddr *uaddr, 111 int addr_len, int flags) 112 { 113 struct sock *sk = sock->sk; 114 115 if (addr_len < sizeof(uaddr->sa_family)) 116 return -EINVAL; 117 118 if (uaddr->sa_family == AF_UNSPEC) 119 return sk->sk_prot->disconnect(sk, flags); 120 121 return sk->sk_prot->connect(sk, uaddr, addr_len); 122 } 123 124 static int ieee802154_dev_ioctl(struct sock *sk, struct ifreq __user *arg, 125 unsigned int cmd) 126 { 127 struct ifreq ifr; 128 int ret = -ENOIOCTLCMD; 129 struct net_device *dev; 130 131 if (get_user_ifreq(&ifr, NULL, arg)) 132 return -EFAULT; 133 134 ifr.ifr_name[IFNAMSIZ-1] = 0; 135 136 dev_load(sock_net(sk), ifr.ifr_name); 137 dev = dev_get_by_name(sock_net(sk), ifr.ifr_name); 138 139 if (!dev) 140 return -ENODEV; 141 142 if (dev->type == ARPHRD_IEEE802154 && dev->netdev_ops->ndo_do_ioctl) 143 ret = dev->netdev_ops->ndo_do_ioctl(dev, &ifr, cmd); 144 145 if (!ret && put_user_ifreq(&ifr, arg)) 146 ret = -EFAULT; 147 dev_put(dev); 148 149 return ret; 150 } 151 152 static int ieee802154_sock_ioctl(struct socket *sock, unsigned int cmd, 153 unsigned long arg) 154 { 155 struct sock *sk = sock->sk; 156 157 switch (cmd) { 158 case SIOCGIFADDR: 159 case SIOCSIFADDR: 160 return ieee802154_dev_ioctl(sk, (struct ifreq __user *)arg, 161 cmd); 162 default: 163 if (!sk->sk_prot->ioctl) 164 return -ENOIOCTLCMD; 165 return sk->sk_prot->ioctl(sk, cmd, arg); 166 } 167 } 168 169 /* RAW Sockets (802.15.4 created in userspace) */ 170 static HLIST_HEAD(raw_head); 171 static DEFINE_RWLOCK(raw_lock); 172 173 static int raw_hash(struct sock *sk) 174 { 175 write_lock_bh(&raw_lock); 176 sk_add_node(sk, &raw_head); 177 write_unlock_bh(&raw_lock); 178 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); 179 180 return 0; 181 } 182 183 static void raw_unhash(struct sock *sk) 184 { 185 write_lock_bh(&raw_lock); 186 if (sk_del_node_init(sk)) 187 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); 188 write_unlock_bh(&raw_lock); 189 } 190 191 static void raw_close(struct sock *sk, long timeout) 192 { 193 sk_common_release(sk); 194 } 195 196 static int raw_bind(struct sock *sk, struct sockaddr *_uaddr, int len) 197 { 198 struct ieee802154_addr addr; 199 struct sockaddr_ieee802154 *uaddr = (struct sockaddr_ieee802154 *)_uaddr; 200 int err = 0; 201 struct net_device *dev = NULL; 202 203 err = ieee802154_sockaddr_check_size(uaddr, len); 204 if (err < 0) 205 return err; 206 207 uaddr = (struct sockaddr_ieee802154 *)_uaddr; 208 if (uaddr->family != AF_IEEE802154) 209 return -EINVAL; 210 211 lock_sock(sk); 212 213 ieee802154_addr_from_sa(&addr, &uaddr->addr); 214 dev = ieee802154_get_dev(sock_net(sk), &addr); 215 if (!dev) { 216 err = -ENODEV; 217 goto out; 218 } 219 220 sk->sk_bound_dev_if = dev->ifindex; 221 sk_dst_reset(sk); 222 223 dev_put(dev); 224 out: 225 release_sock(sk); 226 227 return err; 228 } 229 230 static int raw_connect(struct sock *sk, struct sockaddr *uaddr, 231 int addr_len) 232 { 233 return -ENOTSUPP; 234 } 235 236 static int raw_disconnect(struct sock *sk, int flags) 237 { 238 return 0; 239 } 240 241 static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) 242 { 243 struct net_device *dev; 244 unsigned int mtu; 245 struct sk_buff *skb; 246 int hlen, tlen; 247 int err; 248 249 if (msg->msg_flags & MSG_OOB) { 250 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags); 251 return -EOPNOTSUPP; 252 } 253 254 lock_sock(sk); 255 if (!sk->sk_bound_dev_if) 256 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); 257 else 258 dev = dev_get_by_index(sock_net(sk), sk->sk_bound_dev_if); 259 release_sock(sk); 260 261 if (!dev) { 262 pr_debug("no dev\n"); 263 err = -ENXIO; 264 goto out; 265 } 266 267 mtu = IEEE802154_MTU; 268 pr_debug("name = %s, mtu = %u\n", dev->name, mtu); 269 270 if (size > mtu) { 271 pr_debug("size = %zu, mtu = %u\n", size, mtu); 272 err = -EMSGSIZE; 273 goto out_dev; 274 } 275 if (!size) { 276 err = 0; 277 goto out_dev; 278 } 279 280 hlen = LL_RESERVED_SPACE(dev); 281 tlen = dev->needed_tailroom; 282 skb = sock_alloc_send_skb(sk, hlen + tlen + size, 283 msg->msg_flags & MSG_DONTWAIT, &err); 284 if (!skb) 285 goto out_dev; 286 287 skb_reserve(skb, hlen); 288 289 skb_reset_mac_header(skb); 290 skb_reset_network_header(skb); 291 292 err = memcpy_from_msg(skb_put(skb, size), msg, size); 293 if (err < 0) 294 goto out_skb; 295 296 skb->dev = dev; 297 skb->protocol = htons(ETH_P_IEEE802154); 298 299 err = dev_queue_xmit(skb); 300 if (err > 0) 301 err = net_xmit_errno(err); 302 303 dev_put(dev); 304 305 return err ?: size; 306 307 out_skb: 308 kfree_skb(skb); 309 out_dev: 310 dev_put(dev); 311 out: 312 return err; 313 } 314 315 static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 316 int flags, int *addr_len) 317 { 318 size_t copied = 0; 319 int err = -EOPNOTSUPP; 320 struct sk_buff *skb; 321 322 skb = skb_recv_datagram(sk, flags, &err); 323 if (!skb) 324 goto out; 325 326 copied = skb->len; 327 if (len < copied) { 328 msg->msg_flags |= MSG_TRUNC; 329 copied = len; 330 } 331 332 err = skb_copy_datagram_msg(skb, 0, msg, copied); 333 if (err) 334 goto done; 335 336 sock_recv_cmsgs(msg, sk, skb); 337 338 if (flags & MSG_TRUNC) 339 copied = skb->len; 340 done: 341 skb_free_datagram(sk, skb); 342 out: 343 if (err) 344 return err; 345 return copied; 346 } 347 348 static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) 349 { 350 skb = skb_share_check(skb, GFP_ATOMIC); 351 if (!skb) 352 return NET_RX_DROP; 353 354 if (sock_queue_rcv_skb(sk, skb) < 0) { 355 kfree_skb(skb); 356 return NET_RX_DROP; 357 } 358 359 return NET_RX_SUCCESS; 360 } 361 362 static void ieee802154_raw_deliver(struct net_device *dev, struct sk_buff *skb) 363 { 364 struct sock *sk; 365 366 read_lock(&raw_lock); 367 sk_for_each(sk, &raw_head) { 368 bh_lock_sock(sk); 369 if (!sk->sk_bound_dev_if || 370 sk->sk_bound_dev_if == dev->ifindex) { 371 struct sk_buff *clone; 372 373 clone = skb_clone(skb, GFP_ATOMIC); 374 if (clone) 375 raw_rcv_skb(sk, clone); 376 } 377 bh_unlock_sock(sk); 378 } 379 read_unlock(&raw_lock); 380 } 381 382 static int raw_getsockopt(struct sock *sk, int level, int optname, 383 char __user *optval, int __user *optlen) 384 { 385 return -EOPNOTSUPP; 386 } 387 388 static int raw_setsockopt(struct sock *sk, int level, int optname, 389 sockptr_t optval, unsigned int optlen) 390 { 391 return -EOPNOTSUPP; 392 } 393 394 static struct proto ieee802154_raw_prot = { 395 .name = "IEEE-802.15.4-RAW", 396 .owner = THIS_MODULE, 397 .obj_size = sizeof(struct sock), 398 .close = raw_close, 399 .bind = raw_bind, 400 .sendmsg = raw_sendmsg, 401 .recvmsg = raw_recvmsg, 402 .hash = raw_hash, 403 .unhash = raw_unhash, 404 .connect = raw_connect, 405 .disconnect = raw_disconnect, 406 .getsockopt = raw_getsockopt, 407 .setsockopt = raw_setsockopt, 408 }; 409 410 static const struct proto_ops ieee802154_raw_ops = { 411 .family = PF_IEEE802154, 412 .owner = THIS_MODULE, 413 .release = ieee802154_sock_release, 414 .bind = ieee802154_sock_bind, 415 .connect = ieee802154_sock_connect, 416 .socketpair = sock_no_socketpair, 417 .accept = sock_no_accept, 418 .getname = sock_no_getname, 419 .poll = datagram_poll, 420 .ioctl = ieee802154_sock_ioctl, 421 .gettstamp = sock_gettstamp, 422 .listen = sock_no_listen, 423 .shutdown = sock_no_shutdown, 424 .setsockopt = sock_common_setsockopt, 425 .getsockopt = sock_common_getsockopt, 426 .sendmsg = ieee802154_sock_sendmsg, 427 .recvmsg = sock_common_recvmsg, 428 .mmap = sock_no_mmap, 429 .sendpage = sock_no_sendpage, 430 }; 431 432 /* DGRAM Sockets (802.15.4 dataframes) */ 433 static HLIST_HEAD(dgram_head); 434 static DEFINE_RWLOCK(dgram_lock); 435 436 struct dgram_sock { 437 struct sock sk; 438 439 struct ieee802154_addr src_addr; 440 struct ieee802154_addr dst_addr; 441 442 unsigned int bound:1; 443 unsigned int connected:1; 444 unsigned int want_ack:1; 445 unsigned int want_lqi:1; 446 unsigned int secen:1; 447 unsigned int secen_override:1; 448 unsigned int seclevel:3; 449 unsigned int seclevel_override:1; 450 }; 451 452 static inline struct dgram_sock *dgram_sk(const struct sock *sk) 453 { 454 return container_of(sk, struct dgram_sock, sk); 455 } 456 457 static int dgram_hash(struct sock *sk) 458 { 459 write_lock_bh(&dgram_lock); 460 sk_add_node(sk, &dgram_head); 461 write_unlock_bh(&dgram_lock); 462 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); 463 464 return 0; 465 } 466 467 static void dgram_unhash(struct sock *sk) 468 { 469 write_lock_bh(&dgram_lock); 470 if (sk_del_node_init(sk)) 471 sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); 472 write_unlock_bh(&dgram_lock); 473 } 474 475 static int dgram_init(struct sock *sk) 476 { 477 struct dgram_sock *ro = dgram_sk(sk); 478 479 ro->want_ack = 1; 480 ro->want_lqi = 0; 481 return 0; 482 } 483 484 static void dgram_close(struct sock *sk, long timeout) 485 { 486 sk_common_release(sk); 487 } 488 489 static int dgram_bind(struct sock *sk, struct sockaddr *uaddr, int len) 490 { 491 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; 492 struct ieee802154_addr haddr; 493 struct dgram_sock *ro = dgram_sk(sk); 494 int err = -EINVAL; 495 struct net_device *dev; 496 497 lock_sock(sk); 498 499 ro->bound = 0; 500 501 err = ieee802154_sockaddr_check_size(addr, len); 502 if (err < 0) 503 goto out; 504 505 if (addr->family != AF_IEEE802154) 506 goto out; 507 508 ieee802154_addr_from_sa(&haddr, &addr->addr); 509 dev = ieee802154_get_dev(sock_net(sk), &haddr); 510 if (!dev) { 511 err = -ENODEV; 512 goto out; 513 } 514 515 if (dev->type != ARPHRD_IEEE802154) { 516 err = -ENODEV; 517 goto out_put; 518 } 519 520 ro->src_addr = haddr; 521 522 ro->bound = 1; 523 err = 0; 524 out_put: 525 dev_put(dev); 526 out: 527 release_sock(sk); 528 529 return err; 530 } 531 532 static int dgram_ioctl(struct sock *sk, int cmd, unsigned long arg) 533 { 534 switch (cmd) { 535 case SIOCOUTQ: 536 { 537 int amount = sk_wmem_alloc_get(sk); 538 539 return put_user(amount, (int __user *)arg); 540 } 541 542 case SIOCINQ: 543 { 544 struct sk_buff *skb; 545 unsigned long amount; 546 547 amount = 0; 548 spin_lock_bh(&sk->sk_receive_queue.lock); 549 skb = skb_peek(&sk->sk_receive_queue); 550 if (skb) { 551 /* We will only return the amount 552 * of this packet since that is all 553 * that will be read. 554 */ 555 amount = skb->len - ieee802154_hdr_length(skb); 556 } 557 spin_unlock_bh(&sk->sk_receive_queue.lock); 558 return put_user(amount, (int __user *)arg); 559 } 560 } 561 562 return -ENOIOCTLCMD; 563 } 564 565 /* FIXME: autobind */ 566 static int dgram_connect(struct sock *sk, struct sockaddr *uaddr, 567 int len) 568 { 569 struct sockaddr_ieee802154 *addr = (struct sockaddr_ieee802154 *)uaddr; 570 struct dgram_sock *ro = dgram_sk(sk); 571 int err = 0; 572 573 err = ieee802154_sockaddr_check_size(addr, len); 574 if (err < 0) 575 return err; 576 577 if (addr->family != AF_IEEE802154) 578 return -EINVAL; 579 580 lock_sock(sk); 581 582 if (!ro->bound) { 583 err = -ENETUNREACH; 584 goto out; 585 } 586 587 ieee802154_addr_from_sa(&ro->dst_addr, &addr->addr); 588 ro->connected = 1; 589 590 out: 591 release_sock(sk); 592 return err; 593 } 594 595 static int dgram_disconnect(struct sock *sk, int flags) 596 { 597 struct dgram_sock *ro = dgram_sk(sk); 598 599 lock_sock(sk); 600 ro->connected = 0; 601 release_sock(sk); 602 603 return 0; 604 } 605 606 static int dgram_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) 607 { 608 struct net_device *dev; 609 unsigned int mtu; 610 struct sk_buff *skb; 611 struct ieee802154_mac_cb *cb; 612 struct dgram_sock *ro = dgram_sk(sk); 613 struct ieee802154_addr dst_addr; 614 DECLARE_SOCKADDR(struct sockaddr_ieee802154*, daddr, msg->msg_name); 615 int hlen, tlen; 616 int err; 617 618 if (msg->msg_flags & MSG_OOB) { 619 pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags); 620 return -EOPNOTSUPP; 621 } 622 623 if (msg->msg_name) { 624 if (ro->connected) 625 return -EISCONN; 626 if (msg->msg_namelen < IEEE802154_MIN_NAMELEN) 627 return -EINVAL; 628 err = ieee802154_sockaddr_check_size(daddr, msg->msg_namelen); 629 if (err < 0) 630 return err; 631 ieee802154_addr_from_sa(&dst_addr, &daddr->addr); 632 } else { 633 if (!ro->connected) 634 return -EDESTADDRREQ; 635 dst_addr = ro->dst_addr; 636 } 637 638 if (!ro->bound) 639 dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); 640 else 641 dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr); 642 643 if (!dev) { 644 pr_debug("no dev\n"); 645 err = -ENXIO; 646 goto out; 647 } 648 mtu = IEEE802154_MTU; 649 pr_debug("name = %s, mtu = %u\n", dev->name, mtu); 650 651 if (size > mtu) { 652 pr_debug("size = %zu, mtu = %u\n", size, mtu); 653 err = -EMSGSIZE; 654 goto out_dev; 655 } 656 657 hlen = LL_RESERVED_SPACE(dev); 658 tlen = dev->needed_tailroom; 659 skb = sock_alloc_send_skb(sk, hlen + tlen + size, 660 msg->msg_flags & MSG_DONTWAIT, 661 &err); 662 if (!skb) 663 goto out_dev; 664 665 skb_reserve(skb, hlen); 666 667 skb_reset_network_header(skb); 668 669 cb = mac_cb_init(skb); 670 cb->type = IEEE802154_FC_TYPE_DATA; 671 cb->ackreq = ro->want_ack; 672 cb->secen = ro->secen; 673 cb->secen_override = ro->secen_override; 674 cb->seclevel = ro->seclevel; 675 cb->seclevel_override = ro->seclevel_override; 676 677 err = wpan_dev_hard_header(skb, dev, &dst_addr, 678 ro->bound ? &ro->src_addr : NULL, size); 679 if (err < 0) 680 goto out_skb; 681 682 err = memcpy_from_msg(skb_put(skb, size), msg, size); 683 if (err < 0) 684 goto out_skb; 685 686 skb->dev = dev; 687 skb->protocol = htons(ETH_P_IEEE802154); 688 689 err = dev_queue_xmit(skb); 690 if (err > 0) 691 err = net_xmit_errno(err); 692 693 dev_put(dev); 694 695 return err ?: size; 696 697 out_skb: 698 kfree_skb(skb); 699 out_dev: 700 dev_put(dev); 701 out: 702 return err; 703 } 704 705 static int dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 706 int flags, int *addr_len) 707 { 708 size_t copied = 0; 709 int err = -EOPNOTSUPP; 710 struct sk_buff *skb; 711 struct dgram_sock *ro = dgram_sk(sk); 712 DECLARE_SOCKADDR(struct sockaddr_ieee802154 *, saddr, msg->msg_name); 713 714 skb = skb_recv_datagram(sk, flags, &err); 715 if (!skb) 716 goto out; 717 718 copied = skb->len; 719 if (len < copied) { 720 msg->msg_flags |= MSG_TRUNC; 721 copied = len; 722 } 723 724 /* FIXME: skip headers if necessary ?! */ 725 err = skb_copy_datagram_msg(skb, 0, msg, copied); 726 if (err) 727 goto done; 728 729 sock_recv_cmsgs(msg, sk, skb); 730 731 if (saddr) { 732 /* Clear the implicit padding in struct sockaddr_ieee802154 733 * (16 bits between 'family' and 'addr') and in struct 734 * ieee802154_addr_sa (16 bits at the end of the structure). 735 */ 736 memset(saddr, 0, sizeof(*saddr)); 737 738 saddr->family = AF_IEEE802154; 739 ieee802154_addr_to_sa(&saddr->addr, &mac_cb(skb)->source); 740 *addr_len = sizeof(*saddr); 741 } 742 743 if (ro->want_lqi) { 744 err = put_cmsg(msg, SOL_IEEE802154, WPAN_WANTLQI, 745 sizeof(uint8_t), &(mac_cb(skb)->lqi)); 746 if (err) 747 goto done; 748 } 749 750 if (flags & MSG_TRUNC) 751 copied = skb->len; 752 done: 753 skb_free_datagram(sk, skb); 754 out: 755 if (err) 756 return err; 757 return copied; 758 } 759 760 static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb) 761 { 762 skb = skb_share_check(skb, GFP_ATOMIC); 763 if (!skb) 764 return NET_RX_DROP; 765 766 if (sock_queue_rcv_skb(sk, skb) < 0) { 767 kfree_skb(skb); 768 return NET_RX_DROP; 769 } 770 771 return NET_RX_SUCCESS; 772 } 773 774 static inline bool 775 ieee802154_match_sock(__le64 hw_addr, __le16 pan_id, __le16 short_addr, 776 struct dgram_sock *ro) 777 { 778 if (!ro->bound) 779 return true; 780 781 if (ro->src_addr.mode == IEEE802154_ADDR_LONG && 782 hw_addr == ro->src_addr.extended_addr) 783 return true; 784 785 if (ro->src_addr.mode == IEEE802154_ADDR_SHORT && 786 pan_id == ro->src_addr.pan_id && 787 short_addr == ro->src_addr.short_addr) 788 return true; 789 790 return false; 791 } 792 793 static int ieee802154_dgram_deliver(struct net_device *dev, struct sk_buff *skb) 794 { 795 struct sock *sk, *prev = NULL; 796 int ret = NET_RX_SUCCESS; 797 __le16 pan_id, short_addr; 798 __le64 hw_addr; 799 800 /* Data frame processing */ 801 BUG_ON(dev->type != ARPHRD_IEEE802154); 802 803 pan_id = dev->ieee802154_ptr->pan_id; 804 short_addr = dev->ieee802154_ptr->short_addr; 805 hw_addr = dev->ieee802154_ptr->extended_addr; 806 807 read_lock(&dgram_lock); 808 sk_for_each(sk, &dgram_head) { 809 if (ieee802154_match_sock(hw_addr, pan_id, short_addr, 810 dgram_sk(sk))) { 811 if (prev) { 812 struct sk_buff *clone; 813 814 clone = skb_clone(skb, GFP_ATOMIC); 815 if (clone) 816 dgram_rcv_skb(prev, clone); 817 } 818 819 prev = sk; 820 } 821 } 822 823 if (prev) { 824 dgram_rcv_skb(prev, skb); 825 } else { 826 kfree_skb(skb); 827 ret = NET_RX_DROP; 828 } 829 read_unlock(&dgram_lock); 830 831 return ret; 832 } 833 834 static int dgram_getsockopt(struct sock *sk, int level, int optname, 835 char __user *optval, int __user *optlen) 836 { 837 struct dgram_sock *ro = dgram_sk(sk); 838 839 int val, len; 840 841 if (level != SOL_IEEE802154) 842 return -EOPNOTSUPP; 843 844 if (get_user(len, optlen)) 845 return -EFAULT; 846 847 len = min_t(unsigned int, len, sizeof(int)); 848 849 switch (optname) { 850 case WPAN_WANTACK: 851 val = ro->want_ack; 852 break; 853 case WPAN_WANTLQI: 854 val = ro->want_lqi; 855 break; 856 case WPAN_SECURITY: 857 if (!ro->secen_override) 858 val = WPAN_SECURITY_DEFAULT; 859 else if (ro->secen) 860 val = WPAN_SECURITY_ON; 861 else 862 val = WPAN_SECURITY_OFF; 863 break; 864 case WPAN_SECURITY_LEVEL: 865 if (!ro->seclevel_override) 866 val = WPAN_SECURITY_LEVEL_DEFAULT; 867 else 868 val = ro->seclevel; 869 break; 870 default: 871 return -ENOPROTOOPT; 872 } 873 874 if (put_user(len, optlen)) 875 return -EFAULT; 876 if (copy_to_user(optval, &val, len)) 877 return -EFAULT; 878 return 0; 879 } 880 881 static int dgram_setsockopt(struct sock *sk, int level, int optname, 882 sockptr_t optval, unsigned int optlen) 883 { 884 struct dgram_sock *ro = dgram_sk(sk); 885 struct net *net = sock_net(sk); 886 int val; 887 int err = 0; 888 889 if (optlen < sizeof(int)) 890 return -EINVAL; 891 892 if (copy_from_sockptr(&val, optval, sizeof(int))) 893 return -EFAULT; 894 895 lock_sock(sk); 896 897 switch (optname) { 898 case WPAN_WANTACK: 899 ro->want_ack = !!val; 900 break; 901 case WPAN_WANTLQI: 902 ro->want_lqi = !!val; 903 break; 904 case WPAN_SECURITY: 905 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && 906 !ns_capable(net->user_ns, CAP_NET_RAW)) { 907 err = -EPERM; 908 break; 909 } 910 911 switch (val) { 912 case WPAN_SECURITY_DEFAULT: 913 ro->secen_override = 0; 914 break; 915 case WPAN_SECURITY_ON: 916 ro->secen_override = 1; 917 ro->secen = 1; 918 break; 919 case WPAN_SECURITY_OFF: 920 ro->secen_override = 1; 921 ro->secen = 0; 922 break; 923 default: 924 err = -EINVAL; 925 break; 926 } 927 break; 928 case WPAN_SECURITY_LEVEL: 929 if (!ns_capable(net->user_ns, CAP_NET_ADMIN) && 930 !ns_capable(net->user_ns, CAP_NET_RAW)) { 931 err = -EPERM; 932 break; 933 } 934 935 if (val < WPAN_SECURITY_LEVEL_DEFAULT || 936 val > IEEE802154_SCF_SECLEVEL_ENC_MIC128) { 937 err = -EINVAL; 938 } else if (val == WPAN_SECURITY_LEVEL_DEFAULT) { 939 ro->seclevel_override = 0; 940 } else { 941 ro->seclevel_override = 1; 942 ro->seclevel = val; 943 } 944 break; 945 default: 946 err = -ENOPROTOOPT; 947 break; 948 } 949 950 release_sock(sk); 951 return err; 952 } 953 954 static struct proto ieee802154_dgram_prot = { 955 .name = "IEEE-802.15.4-MAC", 956 .owner = THIS_MODULE, 957 .obj_size = sizeof(struct dgram_sock), 958 .init = dgram_init, 959 .close = dgram_close, 960 .bind = dgram_bind, 961 .sendmsg = dgram_sendmsg, 962 .recvmsg = dgram_recvmsg, 963 .hash = dgram_hash, 964 .unhash = dgram_unhash, 965 .connect = dgram_connect, 966 .disconnect = dgram_disconnect, 967 .ioctl = dgram_ioctl, 968 .getsockopt = dgram_getsockopt, 969 .setsockopt = dgram_setsockopt, 970 }; 971 972 static const struct proto_ops ieee802154_dgram_ops = { 973 .family = PF_IEEE802154, 974 .owner = THIS_MODULE, 975 .release = ieee802154_sock_release, 976 .bind = ieee802154_sock_bind, 977 .connect = ieee802154_sock_connect, 978 .socketpair = sock_no_socketpair, 979 .accept = sock_no_accept, 980 .getname = sock_no_getname, 981 .poll = datagram_poll, 982 .ioctl = ieee802154_sock_ioctl, 983 .gettstamp = sock_gettstamp, 984 .listen = sock_no_listen, 985 .shutdown = sock_no_shutdown, 986 .setsockopt = sock_common_setsockopt, 987 .getsockopt = sock_common_getsockopt, 988 .sendmsg = ieee802154_sock_sendmsg, 989 .recvmsg = sock_common_recvmsg, 990 .mmap = sock_no_mmap, 991 .sendpage = sock_no_sendpage, 992 }; 993 994 static void ieee802154_sock_destruct(struct sock *sk) 995 { 996 skb_queue_purge(&sk->sk_receive_queue); 997 } 998 999 /* Create a socket. Initialise the socket, blank the addresses 1000 * set the state. 1001 */ 1002 static int ieee802154_create(struct net *net, struct socket *sock, 1003 int protocol, int kern) 1004 { 1005 struct sock *sk; 1006 int rc; 1007 struct proto *proto; 1008 const struct proto_ops *ops; 1009 1010 if (!net_eq(net, &init_net)) 1011 return -EAFNOSUPPORT; 1012 1013 switch (sock->type) { 1014 case SOCK_RAW: 1015 rc = -EPERM; 1016 if (!capable(CAP_NET_RAW)) 1017 goto out; 1018 proto = &ieee802154_raw_prot; 1019 ops = &ieee802154_raw_ops; 1020 break; 1021 case SOCK_DGRAM: 1022 proto = &ieee802154_dgram_prot; 1023 ops = &ieee802154_dgram_ops; 1024 break; 1025 default: 1026 rc = -ESOCKTNOSUPPORT; 1027 goto out; 1028 } 1029 1030 rc = -ENOMEM; 1031 sk = sk_alloc(net, PF_IEEE802154, GFP_KERNEL, proto, kern); 1032 if (!sk) 1033 goto out; 1034 rc = 0; 1035 1036 sock->ops = ops; 1037 1038 sock_init_data(sock, sk); 1039 sk->sk_destruct = ieee802154_sock_destruct; 1040 sk->sk_family = PF_IEEE802154; 1041 1042 /* Checksums on by default */ 1043 sock_set_flag(sk, SOCK_ZAPPED); 1044 1045 if (sk->sk_prot->hash) { 1046 rc = sk->sk_prot->hash(sk); 1047 if (rc) { 1048 sk_common_release(sk); 1049 goto out; 1050 } 1051 } 1052 1053 if (sk->sk_prot->init) { 1054 rc = sk->sk_prot->init(sk); 1055 if (rc) 1056 sk_common_release(sk); 1057 } 1058 out: 1059 return rc; 1060 } 1061 1062 static const struct net_proto_family ieee802154_family_ops = { 1063 .family = PF_IEEE802154, 1064 .create = ieee802154_create, 1065 .owner = THIS_MODULE, 1066 }; 1067 1068 static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, 1069 struct packet_type *pt, struct net_device *orig_dev) 1070 { 1071 if (!netif_running(dev)) 1072 goto drop; 1073 pr_debug("got frame, type %d, dev %p\n", dev->type, dev); 1074 #ifdef DEBUG 1075 print_hex_dump_bytes("ieee802154_rcv ", 1076 DUMP_PREFIX_NONE, skb->data, skb->len); 1077 #endif 1078 1079 if (!net_eq(dev_net(dev), &init_net)) 1080 goto drop; 1081 1082 ieee802154_raw_deliver(dev, skb); 1083 1084 if (dev->type != ARPHRD_IEEE802154) 1085 goto drop; 1086 1087 if (skb->pkt_type != PACKET_OTHERHOST) 1088 return ieee802154_dgram_deliver(dev, skb); 1089 1090 drop: 1091 kfree_skb(skb); 1092 return NET_RX_DROP; 1093 } 1094 1095 static struct packet_type ieee802154_packet_type = { 1096 .type = htons(ETH_P_IEEE802154), 1097 .func = ieee802154_rcv, 1098 }; 1099 1100 static int __init af_ieee802154_init(void) 1101 { 1102 int rc; 1103 1104 rc = proto_register(&ieee802154_raw_prot, 1); 1105 if (rc) 1106 goto out; 1107 1108 rc = proto_register(&ieee802154_dgram_prot, 1); 1109 if (rc) 1110 goto err_dgram; 1111 1112 /* Tell SOCKET that we are alive */ 1113 rc = sock_register(&ieee802154_family_ops); 1114 if (rc) 1115 goto err_sock; 1116 dev_add_pack(&ieee802154_packet_type); 1117 1118 rc = 0; 1119 goto out; 1120 1121 err_sock: 1122 proto_unregister(&ieee802154_dgram_prot); 1123 err_dgram: 1124 proto_unregister(&ieee802154_raw_prot); 1125 out: 1126 return rc; 1127 } 1128 1129 static void __exit af_ieee802154_remove(void) 1130 { 1131 dev_remove_pack(&ieee802154_packet_type); 1132 sock_unregister(PF_IEEE802154); 1133 proto_unregister(&ieee802154_dgram_prot); 1134 proto_unregister(&ieee802154_raw_prot); 1135 } 1136 1137 module_init(af_ieee802154_init); 1138 module_exit(af_ieee802154_remove); 1139 1140 MODULE_LICENSE("GPL"); 1141 MODULE_ALIAS_NETPROTO(PF_IEEE802154); 1142