net/rose/af_rose.c

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