net/rose/af_rose.c

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