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