1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) 5 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) 6 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net) 7 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi) 8 */ 9 10 #include <linux/capability.h> 11 #include <linux/module.h> 12 #include <linux/moduleparam.h> 13 #include <linux/init.h> 14 #include <linux/errno.h> 15 #include <linux/types.h> 16 #include <linux/socket.h> 17 #include <linux/in.h> 18 #include <linux/slab.h> 19 #include <linux/kernel.h> 20 #include <linux/sched/signal.h> 21 #include <linux/spinlock.h> 22 #include <linux/timer.h> 23 #include <linux/string.h> 24 #include <linux/sockios.h> 25 #include <linux/net.h> 26 #include <linux/stat.h> 27 #include <net/net_namespace.h> 28 #include <net/ax25.h> 29 #include <linux/inet.h> 30 #include <linux/netdevice.h> 31 #include <linux/if_arp.h> 32 #include <linux/skbuff.h> 33 #include <net/sock.h> 34 #include <linux/uaccess.h> 35 #include <linux/fcntl.h> 36 #include <linux/termios.h> 37 #include <linux/mm.h> 38 #include <linux/interrupt.h> 39 #include <linux/notifier.h> 40 #include <net/rose.h> 41 #include <linux/proc_fs.h> 42 #include <linux/seq_file.h> 43 #include <net/tcp_states.h> 44 #include <net/ip.h> 45 #include <net/arp.h> 46 47 static int rose_ndevs = 10; 48 49 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0; 50 int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1; 51 int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2; 52 int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3; 53 int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE; 54 int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB; 55 int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING; 56 int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT; 57 int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC; 58 int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE; 59 60 static HLIST_HEAD(rose_list); 61 static DEFINE_SPINLOCK(rose_list_lock); 62 63 static const struct proto_ops rose_proto_ops; 64 65 ax25_address rose_callsign; 66 67 /* 68 * ROSE network devices are virtual network devices encapsulating ROSE 69 * frames into AX.25 which will be sent through an AX.25 device, so form a 70 * special "super class" of normal net devices; split their locks off into a 71 * separate class since they always nest. 72 */ 73 static struct lock_class_key rose_netdev_xmit_lock_key; 74 static struct lock_class_key rose_netdev_addr_lock_key; 75 76 static void rose_set_lockdep_one(struct net_device *dev, 77 struct netdev_queue *txq, 78 void *_unused) 79 { 80 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key); 81 } 82 83 static void rose_set_lockdep_key(struct net_device *dev) 84 { 85 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key); 86 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL); 87 } 88 89 /* 90 * Convert a ROSE address into text. 91 */ 92 char *rose2asc(char *buf, const rose_address *addr) 93 { 94 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 && 95 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 && 96 addr->rose_addr[4] == 0x00) { 97 strcpy(buf, "*"); 98 } else { 99 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF, 100 addr->rose_addr[1] & 0xFF, 101 addr->rose_addr[2] & 0xFF, 102 addr->rose_addr[3] & 0xFF, 103 addr->rose_addr[4] & 0xFF); 104 } 105 106 return buf; 107 } 108 109 /* 110 * Compare two ROSE addresses, 0 == equal. 111 */ 112 int rosecmp(const rose_address *addr1, const rose_address *addr2) 113 { 114 int i; 115 116 for (i = 0; i < 5; i++) 117 if (addr1->rose_addr[i] != addr2->rose_addr[i]) 118 return 1; 119 120 return 0; 121 } 122 123 /* 124 * Compare two ROSE addresses for only mask digits, 0 == equal. 125 */ 126 int rosecmpm(const rose_address *addr1, const rose_address *addr2, 127 unsigned short mask) 128 { 129 unsigned int i, j; 130 131 if (mask > 10) 132 return 1; 133 134 for (i = 0; i < mask; i++) { 135 j = i / 2; 136 137 if ((i % 2) != 0) { 138 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F)) 139 return 1; 140 } else { 141 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0)) 142 return 1; 143 } 144 } 145 146 return 0; 147 } 148 149 /* 150 * Socket removal during an interrupt is now safe. 151 */ 152 static void rose_remove_socket(struct sock *sk) 153 { 154 spin_lock_bh(&rose_list_lock); 155 sk_del_node_init(sk); 156 spin_unlock_bh(&rose_list_lock); 157 } 158 159 /* 160 * Kill all bound sockets on a broken link layer connection to a 161 * particular neighbour. 162 */ 163 void rose_kill_by_neigh(struct rose_neigh *neigh) 164 { 165 struct sock *s; 166 167 spin_lock_bh(&rose_list_lock); 168 sk_for_each(s, &rose_list) { 169 struct rose_sock *rose = rose_sk(s); 170 171 if (rose->neighbour == neigh) { 172 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 173 rose_neigh_put(rose->neighbour); 174 rose->neighbour = NULL; 175 } 176 } 177 spin_unlock_bh(&rose_list_lock); 178 } 179 180 /* 181 * Kill all bound sockets on a dropped device. 182 */ 183 static void rose_kill_by_device(struct net_device *dev) 184 { 185 struct sock *sk, *array[16]; 186 struct rose_sock *rose; 187 bool rescan; 188 int i, cnt; 189 190 start: 191 rescan = false; 192 cnt = 0; 193 spin_lock_bh(&rose_list_lock); 194 sk_for_each(sk, &rose_list) { 195 rose = rose_sk(sk); 196 if (rose->device == dev) { 197 if (cnt == ARRAY_SIZE(array)) { 198 rescan = true; 199 break; 200 } 201 sock_hold(sk); 202 array[cnt++] = sk; 203 } 204 } 205 spin_unlock_bh(&rose_list_lock); 206 207 for (i = 0; i < cnt; i++) { 208 sk = array[cnt]; 209 rose = rose_sk(sk); 210 lock_sock(sk); 211 spin_lock_bh(&rose_list_lock); 212 if (rose->device == dev) { 213 rose_disconnect(sk, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); 214 if (rose->neighbour) 215 rose_neigh_put(rose->neighbour); 216 netdev_put(rose->device, &rose->dev_tracker); 217 rose->device = NULL; 218 } 219 spin_unlock_bh(&rose_list_lock); 220 release_sock(sk); 221 sock_put(sk); 222 cond_resched(); 223 } 224 if (rescan) 225 goto start; 226 } 227 228 /* 229 * Handle device status changes. 230 */ 231 static int rose_device_event(struct notifier_block *this, 232 unsigned long event, void *ptr) 233 { 234 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 235 236 if (!net_eq(dev_net(dev), &init_net)) 237 return NOTIFY_DONE; 238 239 if (event != NETDEV_DOWN) 240 return NOTIFY_DONE; 241 242 switch (dev->type) { 243 case ARPHRD_ROSE: 244 rose_kill_by_device(dev); 245 break; 246 case ARPHRD_AX25: 247 rose_link_device_down(dev); 248 rose_rt_device_down(dev); 249 break; 250 } 251 252 return NOTIFY_DONE; 253 } 254 255 /* 256 * Add a socket to the bound sockets list. 257 */ 258 static void rose_insert_socket(struct sock *sk) 259 { 260 261 spin_lock_bh(&rose_list_lock); 262 sk_add_node(sk, &rose_list); 263 spin_unlock_bh(&rose_list_lock); 264 } 265 266 /* 267 * Find a socket that wants to accept the Call Request we just 268 * received. 269 */ 270 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call) 271 { 272 struct sock *s; 273 274 spin_lock_bh(&rose_list_lock); 275 sk_for_each(s, &rose_list) { 276 struct rose_sock *rose = rose_sk(s); 277 278 if (!rosecmp(&rose->source_addr, addr) && 279 !ax25cmp(&rose->source_call, call) && 280 !rose->source_ndigis && s->sk_state == TCP_LISTEN) 281 goto found; 282 } 283 284 sk_for_each(s, &rose_list) { 285 struct rose_sock *rose = rose_sk(s); 286 287 if (!rosecmp(&rose->source_addr, addr) && 288 !ax25cmp(&rose->source_call, &null_ax25_address) && 289 s->sk_state == TCP_LISTEN) 290 goto found; 291 } 292 s = NULL; 293 found: 294 spin_unlock_bh(&rose_list_lock); 295 return s; 296 } 297 298 /* 299 * Find a connected ROSE socket given my LCI and device. 300 */ 301 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh) 302 { 303 struct sock *s; 304 305 spin_lock_bh(&rose_list_lock); 306 sk_for_each(s, &rose_list) { 307 struct rose_sock *rose = rose_sk(s); 308 309 if (rose->lci == lci && rose->neighbour == neigh) 310 goto found; 311 } 312 s = NULL; 313 found: 314 spin_unlock_bh(&rose_list_lock); 315 return s; 316 } 317 318 /* 319 * Find a unique LCI for a given device. 320 */ 321 unsigned int rose_new_lci(struct rose_neigh *neigh) 322 { 323 int lci; 324 325 if (neigh->dce_mode) { 326 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++) 327 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 328 return lci; 329 } else { 330 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--) 331 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL) 332 return lci; 333 } 334 335 return 0; 336 } 337 338 /* 339 * Deferred destroy. 340 */ 341 void rose_destroy_socket(struct sock *); 342 343 /* 344 * Handler for deferred kills. 345 */ 346 static void rose_destroy_timer(struct timer_list *t) 347 { 348 struct sock *sk = timer_container_of(sk, t, sk_timer); 349 350 rose_destroy_socket(sk); 351 } 352 353 /* 354 * This is called from user mode and the timers. Thus it protects itself 355 * against interrupt users but doesn't worry about being called during 356 * work. Once it is removed from the queue no interrupt or bottom half 357 * will touch it and we are (fairly 8-) ) safe. 358 */ 359 void rose_destroy_socket(struct sock *sk) 360 { 361 struct sk_buff *skb; 362 363 rose_remove_socket(sk); 364 rose_stop_heartbeat(sk); 365 rose_stop_idletimer(sk); 366 rose_stop_timer(sk); 367 368 rose_clear_queues(sk); /* Flush the queues */ 369 370 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 371 if (skb->sk != sk) { /* A pending connection */ 372 /* Queue the unaccepted socket for death */ 373 sock_set_flag(skb->sk, SOCK_DEAD); 374 rose_start_heartbeat(skb->sk); 375 rose_sk(skb->sk)->state = ROSE_STATE_0; 376 } 377 378 kfree_skb(skb); 379 } 380 381 if (sk_has_allocations(sk)) { 382 /* Defer: outstanding buffers */ 383 timer_setup(&sk->sk_timer, rose_destroy_timer, 0); 384 sk->sk_timer.expires = jiffies + 10 * HZ; 385 add_timer(&sk->sk_timer); 386 } else 387 sock_put(sk); 388 } 389 390 /* 391 * Handling for system calls applied via the various interfaces to a 392 * ROSE socket object. 393 */ 394 395 static int rose_setsockopt(struct socket *sock, int level, int optname, 396 sockptr_t optval, unsigned int optlen) 397 { 398 struct sock *sk = sock->sk; 399 struct rose_sock *rose = rose_sk(sk); 400 unsigned int opt; 401 402 if (level != SOL_ROSE) 403 return -ENOPROTOOPT; 404 405 if (optlen < sizeof(unsigned int)) 406 return -EINVAL; 407 408 if (copy_from_sockptr(&opt, optval, sizeof(unsigned int))) 409 return -EFAULT; 410 411 switch (optname) { 412 case ROSE_DEFER: 413 rose->defer = opt ? 1 : 0; 414 return 0; 415 416 case ROSE_T1: 417 if (opt < 1 || opt > UINT_MAX / HZ) 418 return -EINVAL; 419 rose->t1 = opt * HZ; 420 return 0; 421 422 case ROSE_T2: 423 if (opt < 1 || opt > UINT_MAX / HZ) 424 return -EINVAL; 425 rose->t2 = opt * HZ; 426 return 0; 427 428 case ROSE_T3: 429 if (opt < 1 || opt > UINT_MAX / HZ) 430 return -EINVAL; 431 rose->t3 = opt * HZ; 432 return 0; 433 434 case ROSE_HOLDBACK: 435 if (opt < 1 || opt > UINT_MAX / HZ) 436 return -EINVAL; 437 rose->hb = opt * HZ; 438 return 0; 439 440 case ROSE_IDLE: 441 if (opt > UINT_MAX / (60 * HZ)) 442 return -EINVAL; 443 rose->idle = opt * 60 * HZ; 444 return 0; 445 446 case ROSE_QBITINCL: 447 rose->qbitincl = opt ? 1 : 0; 448 return 0; 449 450 default: 451 return -ENOPROTOOPT; 452 } 453 } 454 455 static int rose_getsockopt(struct socket *sock, int level, int optname, 456 char __user *optval, int __user *optlen) 457 { 458 struct sock *sk = sock->sk; 459 struct rose_sock *rose = rose_sk(sk); 460 int val = 0; 461 int len; 462 463 if (level != SOL_ROSE) 464 return -ENOPROTOOPT; 465 466 if (get_user(len, optlen)) 467 return -EFAULT; 468 469 if (len < 0) 470 return -EINVAL; 471 472 switch (optname) { 473 case ROSE_DEFER: 474 val = rose->defer; 475 break; 476 477 case ROSE_T1: 478 val = rose->t1 / HZ; 479 break; 480 481 case ROSE_T2: 482 val = rose->t2 / HZ; 483 break; 484 485 case ROSE_T3: 486 val = rose->t3 / HZ; 487 break; 488 489 case ROSE_HOLDBACK: 490 val = rose->hb / HZ; 491 break; 492 493 case ROSE_IDLE: 494 val = rose->idle / (60 * HZ); 495 break; 496 497 case ROSE_QBITINCL: 498 val = rose->qbitincl; 499 break; 500 501 default: 502 return -ENOPROTOOPT; 503 } 504 505 len = min_t(unsigned int, len, sizeof(int)); 506 507 if (put_user(len, optlen)) 508 return -EFAULT; 509 510 return copy_to_user(optval, &val, len) ? -EFAULT : 0; 511 } 512 513 static int rose_listen(struct socket *sock, int backlog) 514 { 515 struct sock *sk = sock->sk; 516 517 lock_sock(sk); 518 if (sock->state != SS_UNCONNECTED) { 519 release_sock(sk); 520 return -EINVAL; 521 } 522 523 if (sk->sk_state != TCP_LISTEN) { 524 struct rose_sock *rose = rose_sk(sk); 525 526 rose->dest_ndigis = 0; 527 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN); 528 memset(&rose->dest_call, 0, AX25_ADDR_LEN); 529 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS); 530 sk->sk_max_ack_backlog = backlog; 531 sk->sk_state = TCP_LISTEN; 532 release_sock(sk); 533 return 0; 534 } 535 release_sock(sk); 536 537 return -EOPNOTSUPP; 538 } 539 540 static struct proto rose_proto = { 541 .name = "ROSE", 542 .owner = THIS_MODULE, 543 .obj_size = sizeof(struct rose_sock), 544 }; 545 546 static int rose_create(struct net *net, struct socket *sock, int protocol, 547 int kern) 548 { 549 struct sock *sk; 550 struct rose_sock *rose; 551 552 if (!net_eq(net, &init_net)) 553 return -EAFNOSUPPORT; 554 555 if (sock->type != SOCK_SEQPACKET || protocol != 0) 556 return -ESOCKTNOSUPPORT; 557 558 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern); 559 if (sk == NULL) 560 return -ENOMEM; 561 562 rose = rose_sk(sk); 563 564 sock_init_data(sock, sk); 565 566 skb_queue_head_init(&rose->ack_queue); 567 #ifdef M_BIT 568 skb_queue_head_init(&rose->frag_queue); 569 rose->fraglen = 0; 570 #endif 571 572 sock->ops = &rose_proto_ops; 573 sk->sk_protocol = protocol; 574 575 timer_setup(&rose->timer, NULL, 0); 576 timer_setup(&rose->idletimer, NULL, 0); 577 578 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout); 579 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout); 580 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout); 581 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout); 582 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout); 583 584 rose->state = ROSE_STATE_0; 585 586 return 0; 587 } 588 589 static struct sock *rose_make_new(struct sock *osk) 590 { 591 struct sock *sk; 592 struct rose_sock *rose, *orose; 593 594 if (osk->sk_type != SOCK_SEQPACKET) 595 return NULL; 596 597 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0); 598 if (sk == NULL) 599 return NULL; 600 601 rose = rose_sk(sk); 602 603 sock_init_data(NULL, sk); 604 605 skb_queue_head_init(&rose->ack_queue); 606 #ifdef M_BIT 607 skb_queue_head_init(&rose->frag_queue); 608 rose->fraglen = 0; 609 #endif 610 611 sk->sk_type = osk->sk_type; 612 sk->sk_priority = READ_ONCE(osk->sk_priority); 613 sk->sk_protocol = osk->sk_protocol; 614 sk->sk_rcvbuf = osk->sk_rcvbuf; 615 sk->sk_sndbuf = osk->sk_sndbuf; 616 sk->sk_state = TCP_ESTABLISHED; 617 sock_copy_flags(sk, osk); 618 619 timer_setup(&rose->timer, NULL, 0); 620 timer_setup(&rose->idletimer, NULL, 0); 621 622 orose = rose_sk(osk); 623 rose->t1 = orose->t1; 624 rose->t2 = orose->t2; 625 rose->t3 = orose->t3; 626 rose->hb = orose->hb; 627 rose->idle = orose->idle; 628 rose->defer = orose->defer; 629 rose->device = orose->device; 630 if (rose->device) 631 netdev_hold(rose->device, &rose->dev_tracker, GFP_ATOMIC); 632 rose->qbitincl = orose->qbitincl; 633 634 return sk; 635 } 636 637 static int rose_release(struct socket *sock) 638 { 639 struct sock *sk = sock->sk; 640 struct rose_sock *rose; 641 642 if (sk == NULL) return 0; 643 644 sock_hold(sk); 645 sock_orphan(sk); 646 lock_sock(sk); 647 rose = rose_sk(sk); 648 649 switch (rose->state) { 650 case ROSE_STATE_0: 651 release_sock(sk); 652 rose_disconnect(sk, 0, -1, -1); 653 lock_sock(sk); 654 rose_destroy_socket(sk); 655 break; 656 657 case ROSE_STATE_2: 658 rose_neigh_put(rose->neighbour); 659 release_sock(sk); 660 rose_disconnect(sk, 0, -1, -1); 661 lock_sock(sk); 662 rose_destroy_socket(sk); 663 break; 664 665 case ROSE_STATE_1: 666 case ROSE_STATE_3: 667 case ROSE_STATE_4: 668 case ROSE_STATE_5: 669 rose_clear_queues(sk); 670 rose_stop_idletimer(sk); 671 rose_write_internal(sk, ROSE_CLEAR_REQUEST); 672 rose_start_t3timer(sk); 673 rose->state = ROSE_STATE_2; 674 sk->sk_state = TCP_CLOSE; 675 sk->sk_shutdown |= SEND_SHUTDOWN; 676 sk->sk_state_change(sk); 677 sock_set_flag(sk, SOCK_DEAD); 678 sock_set_flag(sk, SOCK_DESTROY); 679 break; 680 681 default: 682 break; 683 } 684 685 spin_lock_bh(&rose_list_lock); 686 netdev_put(rose->device, &rose->dev_tracker); 687 rose->device = NULL; 688 spin_unlock_bh(&rose_list_lock); 689 sock->sk = NULL; 690 release_sock(sk); 691 sock_put(sk); 692 693 return 0; 694 } 695 696 static int rose_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len) 697 { 698 struct sock *sk = sock->sk; 699 struct rose_sock *rose = rose_sk(sk); 700 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 701 struct net_device *dev; 702 ax25_address *source; 703 ax25_uid_assoc *user; 704 int err = -EINVAL; 705 int n; 706 707 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 708 return -EINVAL; 709 710 if (addr->srose_family != AF_ROSE) 711 return -EINVAL; 712 713 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 714 return -EINVAL; 715 716 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) 717 return -EINVAL; 718 719 lock_sock(sk); 720 721 if (!sock_flag(sk, SOCK_ZAPPED)) 722 goto out_release; 723 724 err = -EADDRNOTAVAIL; 725 dev = rose_dev_get(&addr->srose_addr); 726 if (!dev) 727 goto out_release; 728 729 source = &addr->srose_call; 730 731 user = ax25_findbyuid(current_euid()); 732 if (user) { 733 rose->source_call = user->call; 734 ax25_uid_put(user); 735 } else { 736 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { 737 dev_put(dev); 738 err = -EACCES; 739 goto out_release; 740 } 741 rose->source_call = *source; 742 } 743 744 rose->source_addr = addr->srose_addr; 745 rose->device = dev; 746 netdev_tracker_alloc(rose->device, &rose->dev_tracker, GFP_KERNEL); 747 rose->source_ndigis = addr->srose_ndigis; 748 749 if (addr_len == sizeof(struct full_sockaddr_rose)) { 750 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 751 for (n = 0 ; n < addr->srose_ndigis ; n++) 752 rose->source_digis[n] = full_addr->srose_digis[n]; 753 } else { 754 if (rose->source_ndigis == 1) { 755 rose->source_digis[0] = addr->srose_digi; 756 } 757 } 758 759 rose_insert_socket(sk); 760 761 sock_reset_flag(sk, SOCK_ZAPPED); 762 err = 0; 763 out_release: 764 release_sock(sk); 765 return err; 766 } 767 768 static int rose_connect(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len, 769 int flags) 770 { 771 struct sock *sk = sock->sk; 772 struct rose_sock *rose = rose_sk(sk); 773 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 774 unsigned char cause, diagnostic; 775 ax25_uid_assoc *user; 776 int n, err = 0; 777 778 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 779 return -EINVAL; 780 781 if (addr->srose_family != AF_ROSE) 782 return -EINVAL; 783 784 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 785 return -EINVAL; 786 787 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) 788 return -EINVAL; 789 790 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ 791 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) 792 return -EINVAL; 793 794 lock_sock(sk); 795 796 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { 797 /* Connect completed during a ERESTARTSYS event */ 798 sock->state = SS_CONNECTED; 799 goto out_release; 800 } 801 802 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { 803 sock->state = SS_UNCONNECTED; 804 err = -ECONNREFUSED; 805 goto out_release; 806 } 807 808 if (sk->sk_state == TCP_ESTABLISHED) { 809 /* No reconnect on a seqpacket socket */ 810 err = -EISCONN; 811 goto out_release; 812 } 813 814 sk->sk_state = TCP_CLOSE; 815 sock->state = SS_UNCONNECTED; 816 817 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, 818 &diagnostic, 0); 819 if (!rose->neighbour) { 820 err = -ENETUNREACH; 821 goto out_release; 822 } 823 824 rose->lci = rose_new_lci(rose->neighbour); 825 if (!rose->lci) { 826 err = -ENETUNREACH; 827 rose_neigh_put(rose->neighbour); 828 goto out_release; 829 } 830 831 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ 832 struct net_device *dev; 833 834 sock_reset_flag(sk, SOCK_ZAPPED); 835 836 dev = rose_dev_first(); 837 if (!dev) { 838 err = -ENETUNREACH; 839 rose_neigh_put(rose->neighbour); 840 goto out_release; 841 } 842 843 user = ax25_findbyuid(current_euid()); 844 if (!user) { 845 err = -EINVAL; 846 rose_neigh_put(rose->neighbour); 847 dev_put(dev); 848 goto out_release; 849 } 850 851 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); 852 rose->source_call = user->call; 853 rose->device = dev; 854 netdev_tracker_alloc(rose->device, &rose->dev_tracker, 855 GFP_KERNEL); 856 ax25_uid_put(user); 857 858 rose_insert_socket(sk); /* Finish the bind */ 859 } 860 rose->dest_addr = addr->srose_addr; 861 rose->dest_call = addr->srose_call; 862 rose->rand = ((long)rose & 0xFFFF) + rose->lci; 863 rose->dest_ndigis = addr->srose_ndigis; 864 865 if (addr_len == sizeof(struct full_sockaddr_rose)) { 866 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 867 for (n = 0 ; n < addr->srose_ndigis ; n++) 868 rose->dest_digis[n] = full_addr->srose_digis[n]; 869 } else { 870 if (rose->dest_ndigis == 1) { 871 rose->dest_digis[0] = addr->srose_digi; 872 } 873 } 874 875 /* Move to connecting socket, start sending Connect Requests */ 876 sock->state = SS_CONNECTING; 877 sk->sk_state = TCP_SYN_SENT; 878 879 rose->state = ROSE_STATE_1; 880 881 rose_write_internal(sk, ROSE_CALL_REQUEST); 882 rose_start_heartbeat(sk); 883 rose_start_t1timer(sk); 884 885 /* Now the loop */ 886 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { 887 err = -EINPROGRESS; 888 goto out_release; 889 } 890 891 /* 892 * A Connect Ack with Choke or timeout or failed routing will go to 893 * closed. 894 */ 895 if (sk->sk_state == TCP_SYN_SENT) { 896 DEFINE_WAIT(wait); 897 898 for (;;) { 899 prepare_to_wait(sk_sleep(sk), &wait, 900 TASK_INTERRUPTIBLE); 901 if (sk->sk_state != TCP_SYN_SENT) 902 break; 903 if (!signal_pending(current)) { 904 release_sock(sk); 905 schedule(); 906 lock_sock(sk); 907 continue; 908 } 909 err = -ERESTARTSYS; 910 break; 911 } 912 finish_wait(sk_sleep(sk), &wait); 913 914 if (err) 915 goto out_release; 916 } 917 918 if (sk->sk_state != TCP_ESTABLISHED) { 919 sock->state = SS_UNCONNECTED; 920 err = sock_error(sk); /* Always set at this point */ 921 goto out_release; 922 } 923 924 sock->state = SS_CONNECTED; 925 926 out_release: 927 release_sock(sk); 928 929 return err; 930 } 931 932 static int rose_accept(struct socket *sock, struct socket *newsock, 933 struct proto_accept_arg *arg) 934 { 935 struct sk_buff *skb; 936 struct sock *newsk; 937 DEFINE_WAIT(wait); 938 struct sock *sk; 939 int err = 0; 940 941 if ((sk = sock->sk) == NULL) 942 return -EINVAL; 943 944 lock_sock(sk); 945 if (sk->sk_type != SOCK_SEQPACKET) { 946 err = -EOPNOTSUPP; 947 goto out_release; 948 } 949 950 if (sk->sk_state != TCP_LISTEN) { 951 err = -EINVAL; 952 goto out_release; 953 } 954 955 /* 956 * The write queue this time is holding sockets ready to use 957 * hooked into the SABM we saved 958 */ 959 for (;;) { 960 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 961 962 skb = skb_dequeue(&sk->sk_receive_queue); 963 if (skb) 964 break; 965 966 if (arg->flags & O_NONBLOCK) { 967 err = -EWOULDBLOCK; 968 break; 969 } 970 if (!signal_pending(current)) { 971 release_sock(sk); 972 schedule(); 973 lock_sock(sk); 974 continue; 975 } 976 err = -ERESTARTSYS; 977 break; 978 } 979 finish_wait(sk_sleep(sk), &wait); 980 if (err) 981 goto out_release; 982 983 newsk = skb->sk; 984 sock_graft(newsk, newsock); 985 986 /* Now attach up the new socket */ 987 skb->sk = NULL; 988 kfree_skb(skb); 989 sk_acceptq_removed(sk); 990 991 out_release: 992 release_sock(sk); 993 994 return err; 995 } 996 997 static int rose_getname(struct socket *sock, struct sockaddr *uaddr, 998 int peer) 999 { 1000 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; 1001 struct sock *sk = sock->sk; 1002 struct rose_sock *rose = rose_sk(sk); 1003 int n; 1004 1005 memset(srose, 0, sizeof(*srose)); 1006 if (peer != 0) { 1007 if (sk->sk_state != TCP_ESTABLISHED) 1008 return -ENOTCONN; 1009 srose->srose_family = AF_ROSE; 1010 srose->srose_addr = rose->dest_addr; 1011 srose->srose_call = rose->dest_call; 1012 srose->srose_ndigis = rose->dest_ndigis; 1013 for (n = 0; n < rose->dest_ndigis; n++) 1014 srose->srose_digis[n] = rose->dest_digis[n]; 1015 } else { 1016 srose->srose_family = AF_ROSE; 1017 srose->srose_addr = rose->source_addr; 1018 srose->srose_call = rose->source_call; 1019 srose->srose_ndigis = rose->source_ndigis; 1020 for (n = 0; n < rose->source_ndigis; n++) 1021 srose->srose_digis[n] = rose->source_digis[n]; 1022 } 1023 1024 return sizeof(struct full_sockaddr_rose); 1025 } 1026 1027 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 1028 { 1029 struct sock *sk; 1030 struct sock *make; 1031 struct rose_sock *make_rose; 1032 struct rose_facilities_struct facilities; 1033 int n; 1034 1035 skb->sk = NULL; /* Initially we don't know who it's for */ 1036 1037 /* 1038 * skb->data points to the rose frame start 1039 */ 1040 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 1041 1042 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF, 1043 skb->len - ROSE_CALL_REQ_FACILITIES_OFF, 1044 &facilities)) { 1045 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 1046 return 0; 1047 } 1048 1049 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 1050 1051 /* 1052 * We can't accept the Call Request. 1053 */ 1054 if (sk == NULL || sk_acceptq_is_full(sk) || 1055 (make = rose_make_new(sk)) == NULL) { 1056 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 1057 return 0; 1058 } 1059 1060 skb->sk = make; 1061 make->sk_state = TCP_ESTABLISHED; 1062 make_rose = rose_sk(make); 1063 1064 make_rose->lci = lci; 1065 make_rose->dest_addr = facilities.dest_addr; 1066 make_rose->dest_call = facilities.dest_call; 1067 make_rose->dest_ndigis = facilities.dest_ndigis; 1068 for (n = 0 ; n < facilities.dest_ndigis ; n++) 1069 make_rose->dest_digis[n] = facilities.dest_digis[n]; 1070 make_rose->source_addr = facilities.source_addr; 1071 make_rose->source_call = facilities.source_call; 1072 make_rose->source_ndigis = facilities.source_ndigis; 1073 for (n = 0 ; n < facilities.source_ndigis ; n++) 1074 make_rose->source_digis[n] = facilities.source_digis[n]; 1075 make_rose->neighbour = neigh; 1076 make_rose->device = dev; 1077 /* Caller got a reference for us. */ 1078 netdev_tracker_alloc(make_rose->device, &make_rose->dev_tracker, 1079 GFP_ATOMIC); 1080 make_rose->facilities = facilities; 1081 1082 rose_neigh_hold(make_rose->neighbour); 1083 1084 if (rose_sk(sk)->defer) { 1085 make_rose->state = ROSE_STATE_5; 1086 } else { 1087 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1088 make_rose->state = ROSE_STATE_3; 1089 rose_start_idletimer(make); 1090 } 1091 1092 make_rose->condition = 0x00; 1093 make_rose->vs = 0; 1094 make_rose->va = 0; 1095 make_rose->vr = 0; 1096 make_rose->vl = 0; 1097 sk_acceptq_added(sk); 1098 1099 rose_insert_socket(make); 1100 1101 skb_queue_head(&sk->sk_receive_queue, skb); 1102 1103 rose_start_heartbeat(make); 1104 1105 if (!sock_flag(sk, SOCK_DEAD)) 1106 sk->sk_data_ready(sk); 1107 1108 return 1; 1109 } 1110 1111 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) 1112 { 1113 struct sock *sk = sock->sk; 1114 struct rose_sock *rose = rose_sk(sk); 1115 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name); 1116 int err; 1117 struct full_sockaddr_rose srose; 1118 struct sk_buff *skb; 1119 unsigned char *asmptr; 1120 int n, size, qbit = 0; 1121 1122 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1123 return -EINVAL; 1124 1125 if (sock_flag(sk, SOCK_ZAPPED)) 1126 return -EADDRNOTAVAIL; 1127 1128 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1129 send_sig(SIGPIPE, current, 0); 1130 return -EPIPE; 1131 } 1132 1133 if (rose->neighbour == NULL || rose->device == NULL) 1134 return -ENETUNREACH; 1135 1136 if (usrose != NULL) { 1137 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1138 return -EINVAL; 1139 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1140 memcpy(&srose, usrose, msg->msg_namelen); 1141 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1142 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1143 return -EISCONN; 1144 if (srose.srose_ndigis != rose->dest_ndigis) 1145 return -EISCONN; 1146 if (srose.srose_ndigis == rose->dest_ndigis) { 1147 for (n = 0 ; n < srose.srose_ndigis ; n++) 1148 if (ax25cmp(&rose->dest_digis[n], 1149 &srose.srose_digis[n])) 1150 return -EISCONN; 1151 } 1152 if (srose.srose_family != AF_ROSE) 1153 return -EINVAL; 1154 } else { 1155 if (sk->sk_state != TCP_ESTABLISHED) 1156 return -ENOTCONN; 1157 1158 srose.srose_family = AF_ROSE; 1159 srose.srose_addr = rose->dest_addr; 1160 srose.srose_call = rose->dest_call; 1161 srose.srose_ndigis = rose->dest_ndigis; 1162 for (n = 0 ; n < rose->dest_ndigis ; n++) 1163 srose.srose_digis[n] = rose->dest_digis[n]; 1164 } 1165 1166 /* Build a packet */ 1167 /* Sanity check the packet size */ 1168 if (len > 65535) 1169 return -EMSGSIZE; 1170 1171 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1172 1173 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1174 return err; 1175 1176 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1177 1178 /* 1179 * Put the data on the end 1180 */ 1181 1182 skb_reset_transport_header(skb); 1183 skb_put(skb, len); 1184 1185 err = memcpy_from_msg(skb_transport_header(skb), msg, len); 1186 if (err) { 1187 kfree_skb(skb); 1188 return err; 1189 } 1190 1191 /* 1192 * If the Q BIT Include socket option is in force, the first 1193 * byte of the user data is the logical value of the Q Bit. 1194 */ 1195 if (rose->qbitincl) { 1196 qbit = skb->data[0]; 1197 skb_pull(skb, 1); 1198 } 1199 1200 /* 1201 * Push down the ROSE header 1202 */ 1203 asmptr = skb_push(skb, ROSE_MIN_LEN); 1204 1205 /* Build a ROSE Network header */ 1206 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1207 asmptr[1] = (rose->lci >> 0) & 0xFF; 1208 asmptr[2] = ROSE_DATA; 1209 1210 if (qbit) 1211 asmptr[0] |= ROSE_Q_BIT; 1212 1213 if (sk->sk_state != TCP_ESTABLISHED) { 1214 kfree_skb(skb); 1215 return -ENOTCONN; 1216 } 1217 1218 #ifdef M_BIT 1219 #define ROSE_PACLEN (256-ROSE_MIN_LEN) 1220 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { 1221 unsigned char header[ROSE_MIN_LEN]; 1222 struct sk_buff *skbn; 1223 int frontlen; 1224 int lg; 1225 1226 /* Save a copy of the Header */ 1227 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); 1228 skb_pull(skb, ROSE_MIN_LEN); 1229 1230 frontlen = skb_headroom(skb); 1231 1232 while (skb->len > 0) { 1233 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { 1234 kfree_skb(skb); 1235 return err; 1236 } 1237 1238 skbn->sk = sk; 1239 skbn->free = 1; 1240 skbn->arp = 1; 1241 1242 skb_reserve(skbn, frontlen); 1243 1244 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; 1245 1246 /* Copy the user data */ 1247 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); 1248 skb_pull(skb, lg); 1249 1250 /* Duplicate the Header */ 1251 skb_push(skbn, ROSE_MIN_LEN); 1252 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); 1253 1254 if (skb->len > 0) 1255 skbn->data[2] |= M_BIT; 1256 1257 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ 1258 } 1259 1260 skb->free = 1; 1261 kfree_skb(skb); 1262 } else { 1263 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ 1264 } 1265 #else 1266 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ 1267 #endif 1268 1269 rose_kick(sk); 1270 1271 return len; 1272 } 1273 1274 1275 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, 1276 int flags) 1277 { 1278 struct sock *sk = sock->sk; 1279 struct rose_sock *rose = rose_sk(sk); 1280 size_t copied; 1281 unsigned char *asmptr; 1282 struct sk_buff *skb; 1283 int n, er, qbit; 1284 1285 /* 1286 * This works for seqpacket too. The receiver has ordered the queue for 1287 * us! We do one quick check first though 1288 */ 1289 if (sk->sk_state != TCP_ESTABLISHED) 1290 return -ENOTCONN; 1291 1292 /* Now we can treat all alike */ 1293 skb = skb_recv_datagram(sk, flags, &er); 1294 if (!skb) 1295 return er; 1296 1297 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1298 1299 skb_pull(skb, ROSE_MIN_LEN); 1300 1301 if (rose->qbitincl) { 1302 asmptr = skb_push(skb, 1); 1303 *asmptr = qbit; 1304 } 1305 1306 skb_reset_transport_header(skb); 1307 copied = skb->len; 1308 1309 if (copied > size) { 1310 copied = size; 1311 msg->msg_flags |= MSG_TRUNC; 1312 } 1313 1314 skb_copy_datagram_msg(skb, 0, msg, copied); 1315 1316 if (msg->msg_name) { 1317 struct sockaddr_rose *srose; 1318 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose, 1319 msg->msg_name); 1320 1321 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose)); 1322 srose = msg->msg_name; 1323 srose->srose_family = AF_ROSE; 1324 srose->srose_addr = rose->dest_addr; 1325 srose->srose_call = rose->dest_call; 1326 srose->srose_ndigis = rose->dest_ndigis; 1327 for (n = 0 ; n < rose->dest_ndigis ; n++) 1328 full_srose->srose_digis[n] = rose->dest_digis[n]; 1329 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1330 } 1331 1332 skb_free_datagram(sk, skb); 1333 1334 return copied; 1335 } 1336 1337 1338 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1339 { 1340 struct sock *sk = sock->sk; 1341 struct rose_sock *rose = rose_sk(sk); 1342 void __user *argp = (void __user *)arg; 1343 1344 switch (cmd) { 1345 case TIOCOUTQ: { 1346 long amount; 1347 1348 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 1349 if (amount < 0) 1350 amount = 0; 1351 return put_user(amount, (unsigned int __user *) argp); 1352 } 1353 1354 case TIOCINQ: { 1355 struct sk_buff *skb; 1356 long amount = 0L; 1357 1358 spin_lock_irq(&sk->sk_receive_queue.lock); 1359 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1360 amount = skb->len; 1361 spin_unlock_irq(&sk->sk_receive_queue.lock); 1362 return put_user(amount, (unsigned int __user *) argp); 1363 } 1364 1365 case SIOCGIFADDR: 1366 case SIOCSIFADDR: 1367 case SIOCGIFDSTADDR: 1368 case SIOCSIFDSTADDR: 1369 case SIOCGIFBRDADDR: 1370 case SIOCSIFBRDADDR: 1371 case SIOCGIFNETMASK: 1372 case SIOCSIFNETMASK: 1373 case SIOCGIFMETRIC: 1374 case SIOCSIFMETRIC: 1375 return -EINVAL; 1376 1377 case SIOCADDRT: 1378 case SIOCDELRT: 1379 case SIOCRSCLRRT: 1380 if (!capable(CAP_NET_ADMIN)) 1381 return -EPERM; 1382 return rose_rt_ioctl(cmd, argp); 1383 1384 case SIOCRSGCAUSE: { 1385 struct rose_cause_struct rose_cause; 1386 rose_cause.cause = rose->cause; 1387 rose_cause.diagnostic = rose->diagnostic; 1388 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1389 } 1390 1391 case SIOCRSSCAUSE: { 1392 struct rose_cause_struct rose_cause; 1393 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1394 return -EFAULT; 1395 rose->cause = rose_cause.cause; 1396 rose->diagnostic = rose_cause.diagnostic; 1397 return 0; 1398 } 1399 1400 case SIOCRSSL2CALL: 1401 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1402 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1403 ax25_listen_release(&rose_callsign, NULL); 1404 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1405 return -EFAULT; 1406 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1407 return ax25_listen_register(&rose_callsign, NULL); 1408 1409 return 0; 1410 1411 case SIOCRSGL2CALL: 1412 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1413 1414 case SIOCRSACCEPT: 1415 if (rose->state == ROSE_STATE_5) { 1416 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1417 rose_start_idletimer(sk); 1418 rose->condition = 0x00; 1419 rose->vs = 0; 1420 rose->va = 0; 1421 rose->vr = 0; 1422 rose->vl = 0; 1423 rose->state = ROSE_STATE_3; 1424 } 1425 return 0; 1426 1427 default: 1428 return -ENOIOCTLCMD; 1429 } 1430 1431 return 0; 1432 } 1433 1434 #ifdef CONFIG_PROC_FS 1435 static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1436 __acquires(rose_list_lock) 1437 { 1438 spin_lock_bh(&rose_list_lock); 1439 return seq_hlist_start_head(&rose_list, *pos); 1440 } 1441 1442 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1443 { 1444 return seq_hlist_next(v, &rose_list, pos); 1445 } 1446 1447 static void rose_info_stop(struct seq_file *seq, void *v) 1448 __releases(rose_list_lock) 1449 { 1450 spin_unlock_bh(&rose_list_lock); 1451 } 1452 1453 static int rose_info_show(struct seq_file *seq, void *v) 1454 { 1455 char buf[11], rsbuf[11]; 1456 1457 if (v == SEQ_START_TOKEN) 1458 seq_puts(seq, 1459 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n"); 1460 1461 else { 1462 struct sock *s = sk_entry(v); 1463 struct rose_sock *rose = rose_sk(s); 1464 const char *devname, *callsign; 1465 const struct net_device *dev = rose->device; 1466 1467 if (!dev) 1468 devname = "???"; 1469 else 1470 devname = dev->name; 1471 1472 seq_printf(seq, "%-10s %-9s ", 1473 rose2asc(rsbuf, &rose->dest_addr), 1474 ax2asc(buf, &rose->dest_call)); 1475 1476 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1477 callsign = "??????-?"; 1478 else 1479 callsign = ax2asc(buf, &rose->source_call); 1480 1481 seq_printf(seq, 1482 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1483 rose2asc(rsbuf, &rose->source_addr), 1484 callsign, 1485 devname, 1486 rose->lci & 0x0FFF, 1487 (rose->neighbour) ? rose->neighbour->number : 0, 1488 rose->state, 1489 rose->vs, 1490 rose->vr, 1491 rose->va, 1492 ax25_display_timer(&rose->timer) / HZ, 1493 rose->t1 / HZ, 1494 rose->t2 / HZ, 1495 rose->t3 / HZ, 1496 rose->hb / HZ, 1497 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1498 rose->idle / (60 * HZ), 1499 sk_wmem_alloc_get(s), 1500 sk_rmem_alloc_get(s), 1501 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1502 } 1503 1504 return 0; 1505 } 1506 1507 static const struct seq_operations rose_info_seqops = { 1508 .start = rose_info_start, 1509 .next = rose_info_next, 1510 .stop = rose_info_stop, 1511 .show = rose_info_show, 1512 }; 1513 #endif /* CONFIG_PROC_FS */ 1514 1515 static const struct net_proto_family rose_family_ops = { 1516 .family = PF_ROSE, 1517 .create = rose_create, 1518 .owner = THIS_MODULE, 1519 }; 1520 1521 static const struct proto_ops rose_proto_ops = { 1522 .family = PF_ROSE, 1523 .owner = THIS_MODULE, 1524 .release = rose_release, 1525 .bind = rose_bind, 1526 .connect = rose_connect, 1527 .socketpair = sock_no_socketpair, 1528 .accept = rose_accept, 1529 .getname = rose_getname, 1530 .poll = datagram_poll, 1531 .ioctl = rose_ioctl, 1532 .gettstamp = sock_gettstamp, 1533 .listen = rose_listen, 1534 .shutdown = sock_no_shutdown, 1535 .setsockopt = rose_setsockopt, 1536 .getsockopt = rose_getsockopt, 1537 .sendmsg = rose_sendmsg, 1538 .recvmsg = rose_recvmsg, 1539 .mmap = sock_no_mmap, 1540 }; 1541 1542 static struct notifier_block rose_dev_notifier = { 1543 .notifier_call = rose_device_event, 1544 }; 1545 1546 static struct net_device **dev_rose; 1547 1548 static struct ax25_protocol rose_pid = { 1549 .pid = AX25_P_ROSE, 1550 .func = rose_route_frame 1551 }; 1552 1553 static struct ax25_linkfail rose_linkfail_notifier = { 1554 .func = rose_link_failed 1555 }; 1556 1557 static int __init rose_proto_init(void) 1558 { 1559 int i; 1560 int rc; 1561 1562 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1563 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n"); 1564 rc = -EINVAL; 1565 goto out; 1566 } 1567 1568 rc = proto_register(&rose_proto, 0); 1569 if (rc != 0) 1570 goto out; 1571 1572 rose_callsign = null_ax25_address; 1573 1574 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *), 1575 GFP_KERNEL); 1576 if (dev_rose == NULL) { 1577 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1578 rc = -ENOMEM; 1579 goto out_proto_unregister; 1580 } 1581 1582 for (i = 0; i < rose_ndevs; i++) { 1583 struct net_device *dev; 1584 char name[IFNAMSIZ]; 1585 1586 sprintf(name, "rose%d", i); 1587 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup); 1588 if (!dev) { 1589 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1590 rc = -ENOMEM; 1591 goto fail; 1592 } 1593 rc = register_netdev(dev); 1594 if (rc) { 1595 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1596 free_netdev(dev); 1597 goto fail; 1598 } 1599 rose_set_lockdep_key(dev); 1600 dev_rose[i] = dev; 1601 } 1602 1603 sock_register(&rose_family_ops); 1604 register_netdevice_notifier(&rose_dev_notifier); 1605 1606 ax25_register_pid(&rose_pid); 1607 ax25_linkfail_register(&rose_linkfail_notifier); 1608 1609 #ifdef CONFIG_SYSCTL 1610 rose_register_sysctl(); 1611 #endif 1612 rose_loopback_init(); 1613 1614 rose_add_loopback_neigh(); 1615 1616 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops); 1617 proc_create_seq("rose_neigh", 0444, init_net.proc_net, 1618 &rose_neigh_seqops); 1619 proc_create_seq("rose_nodes", 0444, init_net.proc_net, 1620 &rose_node_seqops); 1621 proc_create_seq("rose_routes", 0444, init_net.proc_net, 1622 &rose_route_seqops); 1623 out: 1624 return rc; 1625 fail: 1626 while (--i >= 0) { 1627 unregister_netdev(dev_rose[i]); 1628 free_netdev(dev_rose[i]); 1629 } 1630 kfree(dev_rose); 1631 out_proto_unregister: 1632 proto_unregister(&rose_proto); 1633 goto out; 1634 } 1635 module_init(rose_proto_init); 1636 1637 module_param(rose_ndevs, int, 0); 1638 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1639 1640 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1641 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1642 MODULE_LICENSE("GPL"); 1643 MODULE_ALIAS_NETPROTO(PF_ROSE); 1644 1645 static void __exit rose_exit(void) 1646 { 1647 int i; 1648 1649 remove_proc_entry("rose", init_net.proc_net); 1650 remove_proc_entry("rose_neigh", init_net.proc_net); 1651 remove_proc_entry("rose_nodes", init_net.proc_net); 1652 remove_proc_entry("rose_routes", init_net.proc_net); 1653 rose_loopback_clear(); 1654 1655 rose_rt_free(); 1656 1657 ax25_protocol_release(AX25_P_ROSE); 1658 ax25_linkfail_release(&rose_linkfail_notifier); 1659 1660 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1661 ax25_listen_release(&rose_callsign, NULL); 1662 1663 #ifdef CONFIG_SYSCTL 1664 rose_unregister_sysctl(); 1665 #endif 1666 unregister_netdevice_notifier(&rose_dev_notifier); 1667 1668 sock_unregister(PF_ROSE); 1669 1670 for (i = 0; i < rose_ndevs; i++) { 1671 struct net_device *dev = dev_rose[i]; 1672 1673 if (dev) { 1674 unregister_netdev(dev); 1675 free_netdev(dev); 1676 } 1677 } 1678 1679 kfree(dev_rose); 1680 proto_unregister(&rose_proto); 1681 } 1682 1683 module_exit(rose_exit); 1684