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->neighbour->use--; 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->neighbour->use--; 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 = from_timer(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 int opt; 401 402 if (level != SOL_ROSE) 403 return -ENOPROTOOPT; 404 405 if (optlen < sizeof(int)) 406 return -EINVAL; 407 408 if (copy_from_sockptr(&opt, optval, sizeof(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) 418 return -EINVAL; 419 rose->t1 = opt * HZ; 420 return 0; 421 422 case ROSE_T2: 423 if (opt < 1) 424 return -EINVAL; 425 rose->t2 = opt * HZ; 426 return 0; 427 428 case ROSE_T3: 429 if (opt < 1) 430 return -EINVAL; 431 rose->t3 = opt * HZ; 432 return 0; 433 434 case ROSE_HOLDBACK: 435 if (opt < 1) 436 return -EINVAL; 437 rose->hb = opt * HZ; 438 return 0; 439 440 case ROSE_IDLE: 441 if (opt < 0) 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 = 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->neighbour->use--; 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 *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 n; 705 706 if (!sock_flag(sk, SOCK_ZAPPED)) 707 return -EINVAL; 708 709 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 710 return -EINVAL; 711 712 if (addr->srose_family != AF_ROSE) 713 return -EINVAL; 714 715 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 716 return -EINVAL; 717 718 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) 719 return -EINVAL; 720 721 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) 722 return -EADDRNOTAVAIL; 723 724 source = &addr->srose_call; 725 726 user = ax25_findbyuid(current_euid()); 727 if (user) { 728 rose->source_call = user->call; 729 ax25_uid_put(user); 730 } else { 731 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { 732 dev_put(dev); 733 return -EACCES; 734 } 735 rose->source_call = *source; 736 } 737 738 rose->source_addr = addr->srose_addr; 739 rose->device = dev; 740 netdev_tracker_alloc(rose->device, &rose->dev_tracker, GFP_KERNEL); 741 rose->source_ndigis = addr->srose_ndigis; 742 743 if (addr_len == sizeof(struct full_sockaddr_rose)) { 744 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 745 for (n = 0 ; n < addr->srose_ndigis ; n++) 746 rose->source_digis[n] = full_addr->srose_digis[n]; 747 } else { 748 if (rose->source_ndigis == 1) { 749 rose->source_digis[0] = addr->srose_digi; 750 } 751 } 752 753 rose_insert_socket(sk); 754 755 sock_reset_flag(sk, SOCK_ZAPPED); 756 757 return 0; 758 } 759 760 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags) 761 { 762 struct sock *sk = sock->sk; 763 struct rose_sock *rose = rose_sk(sk); 764 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr; 765 unsigned char cause, diagnostic; 766 ax25_uid_assoc *user; 767 int n, err = 0; 768 769 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose)) 770 return -EINVAL; 771 772 if (addr->srose_family != AF_ROSE) 773 return -EINVAL; 774 775 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1) 776 return -EINVAL; 777 778 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS) 779 return -EINVAL; 780 781 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */ 782 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS) 783 return -EINVAL; 784 785 lock_sock(sk); 786 787 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { 788 /* Connect completed during a ERESTARTSYS event */ 789 sock->state = SS_CONNECTED; 790 goto out_release; 791 } 792 793 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { 794 sock->state = SS_UNCONNECTED; 795 err = -ECONNREFUSED; 796 goto out_release; 797 } 798 799 if (sk->sk_state == TCP_ESTABLISHED) { 800 /* No reconnect on a seqpacket socket */ 801 err = -EISCONN; 802 goto out_release; 803 } 804 805 sk->sk_state = TCP_CLOSE; 806 sock->state = SS_UNCONNECTED; 807 808 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, 809 &diagnostic, 0); 810 if (!rose->neighbour) { 811 err = -ENETUNREACH; 812 goto out_release; 813 } 814 815 rose->lci = rose_new_lci(rose->neighbour); 816 if (!rose->lci) { 817 err = -ENETUNREACH; 818 goto out_release; 819 } 820 821 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */ 822 struct net_device *dev; 823 824 sock_reset_flag(sk, SOCK_ZAPPED); 825 826 dev = rose_dev_first(); 827 if (!dev) { 828 err = -ENETUNREACH; 829 goto out_release; 830 } 831 832 user = ax25_findbyuid(current_euid()); 833 if (!user) { 834 err = -EINVAL; 835 dev_put(dev); 836 goto out_release; 837 } 838 839 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); 840 rose->source_call = user->call; 841 rose->device = dev; 842 netdev_tracker_alloc(rose->device, &rose->dev_tracker, 843 GFP_KERNEL); 844 ax25_uid_put(user); 845 846 rose_insert_socket(sk); /* Finish the bind */ 847 } 848 rose->dest_addr = addr->srose_addr; 849 rose->dest_call = addr->srose_call; 850 rose->rand = ((long)rose & 0xFFFF) + rose->lci; 851 rose->dest_ndigis = addr->srose_ndigis; 852 853 if (addr_len == sizeof(struct full_sockaddr_rose)) { 854 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr; 855 for (n = 0 ; n < addr->srose_ndigis ; n++) 856 rose->dest_digis[n] = full_addr->srose_digis[n]; 857 } else { 858 if (rose->dest_ndigis == 1) { 859 rose->dest_digis[0] = addr->srose_digi; 860 } 861 } 862 863 /* Move to connecting socket, start sending Connect Requests */ 864 sock->state = SS_CONNECTING; 865 sk->sk_state = TCP_SYN_SENT; 866 867 rose->state = ROSE_STATE_1; 868 869 rose->neighbour->use++; 870 871 rose_write_internal(sk, ROSE_CALL_REQUEST); 872 rose_start_heartbeat(sk); 873 rose_start_t1timer(sk); 874 875 /* Now the loop */ 876 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) { 877 err = -EINPROGRESS; 878 goto out_release; 879 } 880 881 /* 882 * A Connect Ack with Choke or timeout or failed routing will go to 883 * closed. 884 */ 885 if (sk->sk_state == TCP_SYN_SENT) { 886 DEFINE_WAIT(wait); 887 888 for (;;) { 889 prepare_to_wait(sk_sleep(sk), &wait, 890 TASK_INTERRUPTIBLE); 891 if (sk->sk_state != TCP_SYN_SENT) 892 break; 893 if (!signal_pending(current)) { 894 release_sock(sk); 895 schedule(); 896 lock_sock(sk); 897 continue; 898 } 899 err = -ERESTARTSYS; 900 break; 901 } 902 finish_wait(sk_sleep(sk), &wait); 903 904 if (err) 905 goto out_release; 906 } 907 908 if (sk->sk_state != TCP_ESTABLISHED) { 909 sock->state = SS_UNCONNECTED; 910 err = sock_error(sk); /* Always set at this point */ 911 goto out_release; 912 } 913 914 sock->state = SS_CONNECTED; 915 916 out_release: 917 release_sock(sk); 918 919 return err; 920 } 921 922 static int rose_accept(struct socket *sock, struct socket *newsock, int flags, 923 bool kern) 924 { 925 struct sk_buff *skb; 926 struct sock *newsk; 927 DEFINE_WAIT(wait); 928 struct sock *sk; 929 int err = 0; 930 931 if ((sk = sock->sk) == NULL) 932 return -EINVAL; 933 934 lock_sock(sk); 935 if (sk->sk_type != SOCK_SEQPACKET) { 936 err = -EOPNOTSUPP; 937 goto out_release; 938 } 939 940 if (sk->sk_state != TCP_LISTEN) { 941 err = -EINVAL; 942 goto out_release; 943 } 944 945 /* 946 * The write queue this time is holding sockets ready to use 947 * hooked into the SABM we saved 948 */ 949 for (;;) { 950 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 951 952 skb = skb_dequeue(&sk->sk_receive_queue); 953 if (skb) 954 break; 955 956 if (flags & O_NONBLOCK) { 957 err = -EWOULDBLOCK; 958 break; 959 } 960 if (!signal_pending(current)) { 961 release_sock(sk); 962 schedule(); 963 lock_sock(sk); 964 continue; 965 } 966 err = -ERESTARTSYS; 967 break; 968 } 969 finish_wait(sk_sleep(sk), &wait); 970 if (err) 971 goto out_release; 972 973 newsk = skb->sk; 974 sock_graft(newsk, newsock); 975 976 /* Now attach up the new socket */ 977 skb->sk = NULL; 978 kfree_skb(skb); 979 sk_acceptq_removed(sk); 980 981 out_release: 982 release_sock(sk); 983 984 return err; 985 } 986 987 static int rose_getname(struct socket *sock, struct sockaddr *uaddr, 988 int peer) 989 { 990 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr; 991 struct sock *sk = sock->sk; 992 struct rose_sock *rose = rose_sk(sk); 993 int n; 994 995 memset(srose, 0, sizeof(*srose)); 996 if (peer != 0) { 997 if (sk->sk_state != TCP_ESTABLISHED) 998 return -ENOTCONN; 999 srose->srose_family = AF_ROSE; 1000 srose->srose_addr = rose->dest_addr; 1001 srose->srose_call = rose->dest_call; 1002 srose->srose_ndigis = rose->dest_ndigis; 1003 for (n = 0; n < rose->dest_ndigis; n++) 1004 srose->srose_digis[n] = rose->dest_digis[n]; 1005 } else { 1006 srose->srose_family = AF_ROSE; 1007 srose->srose_addr = rose->source_addr; 1008 srose->srose_call = rose->source_call; 1009 srose->srose_ndigis = rose->source_ndigis; 1010 for (n = 0; n < rose->source_ndigis; n++) 1011 srose->srose_digis[n] = rose->source_digis[n]; 1012 } 1013 1014 return sizeof(struct full_sockaddr_rose); 1015 } 1016 1017 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci) 1018 { 1019 struct sock *sk; 1020 struct sock *make; 1021 struct rose_sock *make_rose; 1022 struct rose_facilities_struct facilities; 1023 int n; 1024 1025 skb->sk = NULL; /* Initially we don't know who it's for */ 1026 1027 /* 1028 * skb->data points to the rose frame start 1029 */ 1030 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct)); 1031 1032 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF, 1033 skb->len - ROSE_CALL_REQ_FACILITIES_OFF, 1034 &facilities)) { 1035 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76); 1036 return 0; 1037 } 1038 1039 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call); 1040 1041 /* 1042 * We can't accept the Call Request. 1043 */ 1044 if (sk == NULL || sk_acceptq_is_full(sk) || 1045 (make = rose_make_new(sk)) == NULL) { 1046 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120); 1047 return 0; 1048 } 1049 1050 skb->sk = make; 1051 make->sk_state = TCP_ESTABLISHED; 1052 make_rose = rose_sk(make); 1053 1054 make_rose->lci = lci; 1055 make_rose->dest_addr = facilities.dest_addr; 1056 make_rose->dest_call = facilities.dest_call; 1057 make_rose->dest_ndigis = facilities.dest_ndigis; 1058 for (n = 0 ; n < facilities.dest_ndigis ; n++) 1059 make_rose->dest_digis[n] = facilities.dest_digis[n]; 1060 make_rose->source_addr = facilities.source_addr; 1061 make_rose->source_call = facilities.source_call; 1062 make_rose->source_ndigis = facilities.source_ndigis; 1063 for (n = 0 ; n < facilities.source_ndigis ; n++) 1064 make_rose->source_digis[n] = facilities.source_digis[n]; 1065 make_rose->neighbour = neigh; 1066 make_rose->device = dev; 1067 /* Caller got a reference for us. */ 1068 netdev_tracker_alloc(make_rose->device, &make_rose->dev_tracker, 1069 GFP_ATOMIC); 1070 make_rose->facilities = facilities; 1071 1072 make_rose->neighbour->use++; 1073 1074 if (rose_sk(sk)->defer) { 1075 make_rose->state = ROSE_STATE_5; 1076 } else { 1077 rose_write_internal(make, ROSE_CALL_ACCEPTED); 1078 make_rose->state = ROSE_STATE_3; 1079 rose_start_idletimer(make); 1080 } 1081 1082 make_rose->condition = 0x00; 1083 make_rose->vs = 0; 1084 make_rose->va = 0; 1085 make_rose->vr = 0; 1086 make_rose->vl = 0; 1087 sk_acceptq_added(sk); 1088 1089 rose_insert_socket(make); 1090 1091 skb_queue_head(&sk->sk_receive_queue, skb); 1092 1093 rose_start_heartbeat(make); 1094 1095 if (!sock_flag(sk, SOCK_DEAD)) 1096 sk->sk_data_ready(sk); 1097 1098 return 1; 1099 } 1100 1101 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) 1102 { 1103 struct sock *sk = sock->sk; 1104 struct rose_sock *rose = rose_sk(sk); 1105 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name); 1106 int err; 1107 struct full_sockaddr_rose srose; 1108 struct sk_buff *skb; 1109 unsigned char *asmptr; 1110 int n, size, qbit = 0; 1111 1112 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) 1113 return -EINVAL; 1114 1115 if (sock_flag(sk, SOCK_ZAPPED)) 1116 return -EADDRNOTAVAIL; 1117 1118 if (sk->sk_shutdown & SEND_SHUTDOWN) { 1119 send_sig(SIGPIPE, current, 0); 1120 return -EPIPE; 1121 } 1122 1123 if (rose->neighbour == NULL || rose->device == NULL) 1124 return -ENETUNREACH; 1125 1126 if (usrose != NULL) { 1127 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose)) 1128 return -EINVAL; 1129 memset(&srose, 0, sizeof(struct full_sockaddr_rose)); 1130 memcpy(&srose, usrose, msg->msg_namelen); 1131 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 || 1132 ax25cmp(&rose->dest_call, &srose.srose_call) != 0) 1133 return -EISCONN; 1134 if (srose.srose_ndigis != rose->dest_ndigis) 1135 return -EISCONN; 1136 if (srose.srose_ndigis == rose->dest_ndigis) { 1137 for (n = 0 ; n < srose.srose_ndigis ; n++) 1138 if (ax25cmp(&rose->dest_digis[n], 1139 &srose.srose_digis[n])) 1140 return -EISCONN; 1141 } 1142 if (srose.srose_family != AF_ROSE) 1143 return -EINVAL; 1144 } else { 1145 if (sk->sk_state != TCP_ESTABLISHED) 1146 return -ENOTCONN; 1147 1148 srose.srose_family = AF_ROSE; 1149 srose.srose_addr = rose->dest_addr; 1150 srose.srose_call = rose->dest_call; 1151 srose.srose_ndigis = rose->dest_ndigis; 1152 for (n = 0 ; n < rose->dest_ndigis ; n++) 1153 srose.srose_digis[n] = rose->dest_digis[n]; 1154 } 1155 1156 /* Build a packet */ 1157 /* Sanity check the packet size */ 1158 if (len > 65535) 1159 return -EMSGSIZE; 1160 1161 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN; 1162 1163 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL) 1164 return err; 1165 1166 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN); 1167 1168 /* 1169 * Put the data on the end 1170 */ 1171 1172 skb_reset_transport_header(skb); 1173 skb_put(skb, len); 1174 1175 err = memcpy_from_msg(skb_transport_header(skb), msg, len); 1176 if (err) { 1177 kfree_skb(skb); 1178 return err; 1179 } 1180 1181 /* 1182 * If the Q BIT Include socket option is in force, the first 1183 * byte of the user data is the logical value of the Q Bit. 1184 */ 1185 if (rose->qbitincl) { 1186 qbit = skb->data[0]; 1187 skb_pull(skb, 1); 1188 } 1189 1190 /* 1191 * Push down the ROSE header 1192 */ 1193 asmptr = skb_push(skb, ROSE_MIN_LEN); 1194 1195 /* Build a ROSE Network header */ 1196 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI; 1197 asmptr[1] = (rose->lci >> 0) & 0xFF; 1198 asmptr[2] = ROSE_DATA; 1199 1200 if (qbit) 1201 asmptr[0] |= ROSE_Q_BIT; 1202 1203 if (sk->sk_state != TCP_ESTABLISHED) { 1204 kfree_skb(skb); 1205 return -ENOTCONN; 1206 } 1207 1208 #ifdef M_BIT 1209 #define ROSE_PACLEN (256-ROSE_MIN_LEN) 1210 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) { 1211 unsigned char header[ROSE_MIN_LEN]; 1212 struct sk_buff *skbn; 1213 int frontlen; 1214 int lg; 1215 1216 /* Save a copy of the Header */ 1217 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN); 1218 skb_pull(skb, ROSE_MIN_LEN); 1219 1220 frontlen = skb_headroom(skb); 1221 1222 while (skb->len > 0) { 1223 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) { 1224 kfree_skb(skb); 1225 return err; 1226 } 1227 1228 skbn->sk = sk; 1229 skbn->free = 1; 1230 skbn->arp = 1; 1231 1232 skb_reserve(skbn, frontlen); 1233 1234 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN; 1235 1236 /* Copy the user data */ 1237 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg); 1238 skb_pull(skb, lg); 1239 1240 /* Duplicate the Header */ 1241 skb_push(skbn, ROSE_MIN_LEN); 1242 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN); 1243 1244 if (skb->len > 0) 1245 skbn->data[2] |= M_BIT; 1246 1247 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */ 1248 } 1249 1250 skb->free = 1; 1251 kfree_skb(skb); 1252 } else { 1253 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */ 1254 } 1255 #else 1256 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */ 1257 #endif 1258 1259 rose_kick(sk); 1260 1261 return len; 1262 } 1263 1264 1265 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, 1266 int flags) 1267 { 1268 struct sock *sk = sock->sk; 1269 struct rose_sock *rose = rose_sk(sk); 1270 size_t copied; 1271 unsigned char *asmptr; 1272 struct sk_buff *skb; 1273 int n, er, qbit; 1274 1275 /* 1276 * This works for seqpacket too. The receiver has ordered the queue for 1277 * us! We do one quick check first though 1278 */ 1279 if (sk->sk_state != TCP_ESTABLISHED) 1280 return -ENOTCONN; 1281 1282 /* Now we can treat all alike */ 1283 skb = skb_recv_datagram(sk, flags, &er); 1284 if (!skb) 1285 return er; 1286 1287 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT; 1288 1289 skb_pull(skb, ROSE_MIN_LEN); 1290 1291 if (rose->qbitincl) { 1292 asmptr = skb_push(skb, 1); 1293 *asmptr = qbit; 1294 } 1295 1296 skb_reset_transport_header(skb); 1297 copied = skb->len; 1298 1299 if (copied > size) { 1300 copied = size; 1301 msg->msg_flags |= MSG_TRUNC; 1302 } 1303 1304 skb_copy_datagram_msg(skb, 0, msg, copied); 1305 1306 if (msg->msg_name) { 1307 struct sockaddr_rose *srose; 1308 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose, 1309 msg->msg_name); 1310 1311 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose)); 1312 srose = msg->msg_name; 1313 srose->srose_family = AF_ROSE; 1314 srose->srose_addr = rose->dest_addr; 1315 srose->srose_call = rose->dest_call; 1316 srose->srose_ndigis = rose->dest_ndigis; 1317 for (n = 0 ; n < rose->dest_ndigis ; n++) 1318 full_srose->srose_digis[n] = rose->dest_digis[n]; 1319 msg->msg_namelen = sizeof(struct full_sockaddr_rose); 1320 } 1321 1322 skb_free_datagram(sk, skb); 1323 1324 return copied; 1325 } 1326 1327 1328 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 1329 { 1330 struct sock *sk = sock->sk; 1331 struct rose_sock *rose = rose_sk(sk); 1332 void __user *argp = (void __user *)arg; 1333 1334 switch (cmd) { 1335 case TIOCOUTQ: { 1336 long amount; 1337 1338 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); 1339 if (amount < 0) 1340 amount = 0; 1341 return put_user(amount, (unsigned int __user *) argp); 1342 } 1343 1344 case TIOCINQ: { 1345 struct sk_buff *skb; 1346 long amount = 0L; 1347 1348 spin_lock_irq(&sk->sk_receive_queue.lock); 1349 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) 1350 amount = skb->len; 1351 spin_unlock_irq(&sk->sk_receive_queue.lock); 1352 return put_user(amount, (unsigned int __user *) argp); 1353 } 1354 1355 case SIOCGIFADDR: 1356 case SIOCSIFADDR: 1357 case SIOCGIFDSTADDR: 1358 case SIOCSIFDSTADDR: 1359 case SIOCGIFBRDADDR: 1360 case SIOCSIFBRDADDR: 1361 case SIOCGIFNETMASK: 1362 case SIOCSIFNETMASK: 1363 case SIOCGIFMETRIC: 1364 case SIOCSIFMETRIC: 1365 return -EINVAL; 1366 1367 case SIOCADDRT: 1368 case SIOCDELRT: 1369 case SIOCRSCLRRT: 1370 if (!capable(CAP_NET_ADMIN)) 1371 return -EPERM; 1372 return rose_rt_ioctl(cmd, argp); 1373 1374 case SIOCRSGCAUSE: { 1375 struct rose_cause_struct rose_cause; 1376 rose_cause.cause = rose->cause; 1377 rose_cause.diagnostic = rose->diagnostic; 1378 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0; 1379 } 1380 1381 case SIOCRSSCAUSE: { 1382 struct rose_cause_struct rose_cause; 1383 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct))) 1384 return -EFAULT; 1385 rose->cause = rose_cause.cause; 1386 rose->diagnostic = rose_cause.diagnostic; 1387 return 0; 1388 } 1389 1390 case SIOCRSSL2CALL: 1391 if (!capable(CAP_NET_ADMIN)) return -EPERM; 1392 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1393 ax25_listen_release(&rose_callsign, NULL); 1394 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address))) 1395 return -EFAULT; 1396 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1397 return ax25_listen_register(&rose_callsign, NULL); 1398 1399 return 0; 1400 1401 case SIOCRSGL2CALL: 1402 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0; 1403 1404 case SIOCRSACCEPT: 1405 if (rose->state == ROSE_STATE_5) { 1406 rose_write_internal(sk, ROSE_CALL_ACCEPTED); 1407 rose_start_idletimer(sk); 1408 rose->condition = 0x00; 1409 rose->vs = 0; 1410 rose->va = 0; 1411 rose->vr = 0; 1412 rose->vl = 0; 1413 rose->state = ROSE_STATE_3; 1414 } 1415 return 0; 1416 1417 default: 1418 return -ENOIOCTLCMD; 1419 } 1420 1421 return 0; 1422 } 1423 1424 #ifdef CONFIG_PROC_FS 1425 static void *rose_info_start(struct seq_file *seq, loff_t *pos) 1426 __acquires(rose_list_lock) 1427 { 1428 spin_lock_bh(&rose_list_lock); 1429 return seq_hlist_start_head(&rose_list, *pos); 1430 } 1431 1432 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos) 1433 { 1434 return seq_hlist_next(v, &rose_list, pos); 1435 } 1436 1437 static void rose_info_stop(struct seq_file *seq, void *v) 1438 __releases(rose_list_lock) 1439 { 1440 spin_unlock_bh(&rose_list_lock); 1441 } 1442 1443 static int rose_info_show(struct seq_file *seq, void *v) 1444 { 1445 char buf[11], rsbuf[11]; 1446 1447 if (v == SEQ_START_TOKEN) 1448 seq_puts(seq, 1449 "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"); 1450 1451 else { 1452 struct sock *s = sk_entry(v); 1453 struct rose_sock *rose = rose_sk(s); 1454 const char *devname, *callsign; 1455 const struct net_device *dev = rose->device; 1456 1457 if (!dev) 1458 devname = "???"; 1459 else 1460 devname = dev->name; 1461 1462 seq_printf(seq, "%-10s %-9s ", 1463 rose2asc(rsbuf, &rose->dest_addr), 1464 ax2asc(buf, &rose->dest_call)); 1465 1466 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0) 1467 callsign = "??????-?"; 1468 else 1469 callsign = ax2asc(buf, &rose->source_call); 1470 1471 seq_printf(seq, 1472 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n", 1473 rose2asc(rsbuf, &rose->source_addr), 1474 callsign, 1475 devname, 1476 rose->lci & 0x0FFF, 1477 (rose->neighbour) ? rose->neighbour->number : 0, 1478 rose->state, 1479 rose->vs, 1480 rose->vr, 1481 rose->va, 1482 ax25_display_timer(&rose->timer) / HZ, 1483 rose->t1 / HZ, 1484 rose->t2 / HZ, 1485 rose->t3 / HZ, 1486 rose->hb / HZ, 1487 ax25_display_timer(&rose->idletimer) / (60 * HZ), 1488 rose->idle / (60 * HZ), 1489 sk_wmem_alloc_get(s), 1490 sk_rmem_alloc_get(s), 1491 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L); 1492 } 1493 1494 return 0; 1495 } 1496 1497 static const struct seq_operations rose_info_seqops = { 1498 .start = rose_info_start, 1499 .next = rose_info_next, 1500 .stop = rose_info_stop, 1501 .show = rose_info_show, 1502 }; 1503 #endif /* CONFIG_PROC_FS */ 1504 1505 static const struct net_proto_family rose_family_ops = { 1506 .family = PF_ROSE, 1507 .create = rose_create, 1508 .owner = THIS_MODULE, 1509 }; 1510 1511 static const struct proto_ops rose_proto_ops = { 1512 .family = PF_ROSE, 1513 .owner = THIS_MODULE, 1514 .release = rose_release, 1515 .bind = rose_bind, 1516 .connect = rose_connect, 1517 .socketpair = sock_no_socketpair, 1518 .accept = rose_accept, 1519 .getname = rose_getname, 1520 .poll = datagram_poll, 1521 .ioctl = rose_ioctl, 1522 .gettstamp = sock_gettstamp, 1523 .listen = rose_listen, 1524 .shutdown = sock_no_shutdown, 1525 .setsockopt = rose_setsockopt, 1526 .getsockopt = rose_getsockopt, 1527 .sendmsg = rose_sendmsg, 1528 .recvmsg = rose_recvmsg, 1529 .mmap = sock_no_mmap, 1530 }; 1531 1532 static struct notifier_block rose_dev_notifier = { 1533 .notifier_call = rose_device_event, 1534 }; 1535 1536 static struct net_device **dev_rose; 1537 1538 static struct ax25_protocol rose_pid = { 1539 .pid = AX25_P_ROSE, 1540 .func = rose_route_frame 1541 }; 1542 1543 static struct ax25_linkfail rose_linkfail_notifier = { 1544 .func = rose_link_failed 1545 }; 1546 1547 static int __init rose_proto_init(void) 1548 { 1549 int i; 1550 int rc; 1551 1552 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) { 1553 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n"); 1554 rc = -EINVAL; 1555 goto out; 1556 } 1557 1558 rc = proto_register(&rose_proto, 0); 1559 if (rc != 0) 1560 goto out; 1561 1562 rose_callsign = null_ax25_address; 1563 1564 dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *), 1565 GFP_KERNEL); 1566 if (dev_rose == NULL) { 1567 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n"); 1568 rc = -ENOMEM; 1569 goto out_proto_unregister; 1570 } 1571 1572 for (i = 0; i < rose_ndevs; i++) { 1573 struct net_device *dev; 1574 char name[IFNAMSIZ]; 1575 1576 sprintf(name, "rose%d", i); 1577 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup); 1578 if (!dev) { 1579 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n"); 1580 rc = -ENOMEM; 1581 goto fail; 1582 } 1583 rc = register_netdev(dev); 1584 if (rc) { 1585 printk(KERN_ERR "ROSE: netdevice registration failed\n"); 1586 free_netdev(dev); 1587 goto fail; 1588 } 1589 rose_set_lockdep_key(dev); 1590 dev_rose[i] = dev; 1591 } 1592 1593 sock_register(&rose_family_ops); 1594 register_netdevice_notifier(&rose_dev_notifier); 1595 1596 ax25_register_pid(&rose_pid); 1597 ax25_linkfail_register(&rose_linkfail_notifier); 1598 1599 #ifdef CONFIG_SYSCTL 1600 rose_register_sysctl(); 1601 #endif 1602 rose_loopback_init(); 1603 1604 rose_add_loopback_neigh(); 1605 1606 proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops); 1607 proc_create_seq("rose_neigh", 0444, init_net.proc_net, 1608 &rose_neigh_seqops); 1609 proc_create_seq("rose_nodes", 0444, init_net.proc_net, 1610 &rose_node_seqops); 1611 proc_create_seq("rose_routes", 0444, init_net.proc_net, 1612 &rose_route_seqops); 1613 out: 1614 return rc; 1615 fail: 1616 while (--i >= 0) { 1617 unregister_netdev(dev_rose[i]); 1618 free_netdev(dev_rose[i]); 1619 } 1620 kfree(dev_rose); 1621 out_proto_unregister: 1622 proto_unregister(&rose_proto); 1623 goto out; 1624 } 1625 module_init(rose_proto_init); 1626 1627 module_param(rose_ndevs, int, 0); 1628 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices"); 1629 1630 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>"); 1631 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol"); 1632 MODULE_LICENSE("GPL"); 1633 MODULE_ALIAS_NETPROTO(PF_ROSE); 1634 1635 static void __exit rose_exit(void) 1636 { 1637 int i; 1638 1639 remove_proc_entry("rose", init_net.proc_net); 1640 remove_proc_entry("rose_neigh", init_net.proc_net); 1641 remove_proc_entry("rose_nodes", init_net.proc_net); 1642 remove_proc_entry("rose_routes", init_net.proc_net); 1643 rose_loopback_clear(); 1644 1645 rose_rt_free(); 1646 1647 ax25_protocol_release(AX25_P_ROSE); 1648 ax25_linkfail_release(&rose_linkfail_notifier); 1649 1650 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0) 1651 ax25_listen_release(&rose_callsign, NULL); 1652 1653 #ifdef CONFIG_SYSCTL 1654 rose_unregister_sysctl(); 1655 #endif 1656 unregister_netdevice_notifier(&rose_dev_notifier); 1657 1658 sock_unregister(PF_ROSE); 1659 1660 for (i = 0; i < rose_ndevs; i++) { 1661 struct net_device *dev = dev_rose[i]; 1662 1663 if (dev) { 1664 unregister_netdev(dev); 1665 free_netdev(dev); 1666 } 1667 } 1668 1669 kfree(dev_rose); 1670 proto_unregister(&rose_proto); 1671 } 1672 1673 module_exit(rose_exit); 1674