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