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 ([email protected])
   8  * Copyright (C) Alan Cox GW4PTS ([email protected])
   9  * Copyright (C) Terry Dawson VK2KTJ ([email protected])
  10  * Copyright (C) Tomi Manninen OH2BNS ([email protected])
  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.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 <asm/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         struct hlist_node *node;
 169
 170         spin_lock_bh(&rose_list_lock);
 171         sk_for_each(s, node, &rose_list) {
 172                 struct rose_sock *rose = rose_sk(s);
 173
 174                 if (rose->neighbour == neigh) {
 175                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 176                         rose->neighbour->use--;
 177                         rose->neighbour = NULL;
 178                 }
 179         }
 180         spin_unlock_bh(&rose_list_lock);
 181 }
 182
 183 /*
 184  *      Kill all bound sockets on a dropped device.
 185  */
 186 static void rose_kill_by_device(struct net_device *dev)
 187 {
 188         struct sock *s;
 189         struct hlist_node *node;
 190
 191         spin_lock_bh(&rose_list_lock);
 192         sk_for_each(s, node, &rose_list) {
 193                 struct rose_sock *rose = rose_sk(s);
 194
 195                 if (rose->device == dev) {
 196                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 197                         rose->neighbour->use--;
 198                         rose->device = NULL;
 199                 }
 200         }
 201         spin_unlock_bh(&rose_list_lock);
 202 }
 203
 204 /*
 205  *      Handle device status changes.
 206  */
 207 static int rose_device_event(struct notifier_block *this, unsigned long event,
 208         void *ptr)
 209 {
 210         struct net_device *dev = (struct net_device *)ptr;
 211
 212         if (!net_eq(dev_net(dev), &init_net))
 213                 return NOTIFY_DONE;
 214
 215         if (event != NETDEV_DOWN)
 216                 return NOTIFY_DONE;
 217
 218         switch (dev->type) {
 219         case ARPHRD_ROSE:
 220                 rose_kill_by_device(dev);
 221                 break;
 222         case ARPHRD_AX25:
 223                 rose_link_device_down(dev);
 224                 rose_rt_device_down(dev);
 225                 break;
 226         }
 227
 228         return NOTIFY_DONE;
 229 }
 230
 231 /*
 232  *      Add a socket to the bound sockets list.
 233  */
 234 static void rose_insert_socket(struct sock *sk)
 235 {
 236
 237         spin_lock_bh(&rose_list_lock);
 238         sk_add_node(sk, &rose_list);
 239         spin_unlock_bh(&rose_list_lock);
 240 }
 241
 242 /*
 243  *      Find a socket that wants to accept the Call Request we just
 244  *      received.
 245  */
 246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 247 {
 248         struct sock *s;
 249         struct hlist_node *node;
 250
 251         spin_lock_bh(&rose_list_lock);
 252         sk_for_each(s, node, &rose_list) {
 253                 struct rose_sock *rose = rose_sk(s);
 254
 255                 if (!rosecmp(&rose->source_addr, addr) &&
 256                     !ax25cmp(&rose->source_call, call) &&
 257                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 258                         goto found;
 259         }
 260
 261         sk_for_each(s, node, &rose_list) {
 262                 struct rose_sock *rose = rose_sk(s);
 263
 264                 if (!rosecmp(&rose->source_addr, addr) &&
 265                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 266                     s->sk_state == TCP_LISTEN)
 267                         goto found;
 268         }
 269         s = NULL;
 270 found:
 271         spin_unlock_bh(&rose_list_lock);
 272         return s;
 273 }
 274
 275 /*
 276  *      Find a connected ROSE socket given my LCI and device.
 277  */
 278 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 279 {
 280         struct sock *s;
 281         struct hlist_node *node;
 282
 283         spin_lock_bh(&rose_list_lock);
 284         sk_for_each(s, node, &rose_list) {
 285                 struct rose_sock *rose = rose_sk(s);
 286
 287                 if (rose->lci == lci && rose->neighbour == neigh)
 288                         goto found;
 289         }
 290         s = NULL;
 291 found:
 292         spin_unlock_bh(&rose_list_lock);
 293         return s;
 294 }
 295
 296 /*
 297  *      Find a unique LCI for a given device.
 298  */
 299 unsigned int rose_new_lci(struct rose_neigh *neigh)
 300 {
 301         int lci;
 302
 303         if (neigh->dce_mode) {
 304                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 305                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 306                                 return lci;
 307         } else {
 308                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 309                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 310                                 return lci;
 311         }
 312
 313         return 0;
 314 }
 315
 316 /*
 317  *      Deferred destroy.
 318  */
 319 void rose_destroy_socket(struct sock *);
 320
 321 /*
 322  *      Handler for deferred kills.
 323  */
 324 static void rose_destroy_timer(unsigned long data)
 325 {
 326         rose_destroy_socket((struct sock *)data);
 327 }
 328
 329 /*
 330  *      This is called from user mode and the timers. Thus it protects itself
 331  *      against interrupt users but doesn't worry about being called during
 332  *      work.  Once it is removed from the queue no interrupt or bottom half
 333  *      will touch it and we are (fairly 8-) ) safe.
 334  */
 335 void rose_destroy_socket(struct sock *sk)
 336 {
 337         struct sk_buff *skb;
 338
 339         rose_remove_socket(sk);
 340         rose_stop_heartbeat(sk);
 341         rose_stop_idletimer(sk);
 342         rose_stop_timer(sk);
 343
 344         rose_clear_queues(sk);          /* Flush the queues */
 345
 346         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 347                 if (skb->sk != sk) {    /* A pending connection */
 348                         /* Queue the unaccepted socket for death */
 349                         sock_set_flag(skb->sk, SOCK_DEAD);
 350                         rose_start_heartbeat(skb->sk);
 351                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 352                 }
 353
 354                 kfree_skb(skb);
 355         }
 356
 357         if (sk_has_allocations(sk)) {
 358                 /* Defer: outstanding buffers */
 359                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 360                                 (unsigned long)sk);
 361                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 362                 add_timer(&sk->sk_timer);
 363         } else
 364                 sock_put(sk);
 365 }
 366
 367 /*
 368  *      Handling for system calls applied via the various interfaces to a
 369  *      ROSE socket object.
 370  */
 371
 372 static int rose_setsockopt(struct socket *sock, int level, int optname,
 373         char __user *optval, unsigned int optlen)
 374 {
 375         struct sock *sk = sock->sk;
 376         struct rose_sock *rose = rose_sk(sk);
 377         int opt;
 378
 379         if (level != SOL_ROSE)
 380                 return -ENOPROTOOPT;
 381
 382         if (optlen < sizeof(int))
 383                 return -EINVAL;
 384
 385         if (get_user(opt, (int __user *)optval))
 386                 return -EFAULT;
 387
 388         switch (optname) {
 389         case ROSE_DEFER:
 390                 rose->defer = opt ? 1 : 0;
 391                 return 0;
 392
 393         case ROSE_T1:
 394                 if (opt < 1)
 395                         return -EINVAL;
 396                 rose->t1 = opt * HZ;
 397                 return 0;
 398
 399         case ROSE_T2:
 400                 if (opt < 1)
 401                         return -EINVAL;
 402                 rose->t2 = opt * HZ;
 403                 return 0;
 404
 405         case ROSE_T3:
 406                 if (opt < 1)
 407                         return -EINVAL;
 408                 rose->t3 = opt * HZ;
 409                 return 0;
 410
 411         case ROSE_HOLDBACK:
 412                 if (opt < 1)
 413                         return -EINVAL;
 414                 rose->hb = opt * HZ;
 415                 return 0;
 416
 417         case ROSE_IDLE:
 418                 if (opt < 0)
 419                         return -EINVAL;
 420                 rose->idle = opt * 60 * HZ;
 421                 return 0;
 422
 423         case ROSE_QBITINCL:
 424                 rose->qbitincl = opt ? 1 : 0;
 425                 return 0;
 426
 427         default:
 428                 return -ENOPROTOOPT;
 429         }
 430 }
 431
 432 static int rose_getsockopt(struct socket *sock, int level, int optname,
 433         char __user *optval, int __user *optlen)
 434 {
 435         struct sock *sk = sock->sk;
 436         struct rose_sock *rose = rose_sk(sk);
 437         int val = 0;
 438         int len;
 439
 440         if (level != SOL_ROSE)
 441                 return -ENOPROTOOPT;
 442
 443         if (get_user(len, optlen))
 444                 return -EFAULT;
 445
 446         if (len < 0)
 447                 return -EINVAL;
 448
 449         switch (optname) {
 450         case ROSE_DEFER:
 451                 val = rose->defer;
 452                 break;
 453
 454         case ROSE_T1:
 455                 val = rose->t1 / HZ;
 456                 break;
 457
 458         case ROSE_T2:
 459                 val = rose->t2 / HZ;
 460                 break;
 461
 462         case ROSE_T3:
 463                 val = rose->t3 / HZ;
 464                 break;
 465
 466         case ROSE_HOLDBACK:
 467                 val = rose->hb / HZ;
 468                 break;
 469
 470         case ROSE_IDLE:
 471                 val = rose->idle / (60 * HZ);
 472                 break;
 473
 474         case ROSE_QBITINCL:
 475                 val = rose->qbitincl;
 476                 break;
 477
 478         default:
 479                 return -ENOPROTOOPT;
 480         }
 481
 482         len = min_t(unsigned int, len, sizeof(int));
 483
 484         if (put_user(len, optlen))
 485                 return -EFAULT;
 486
 487         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 488 }
 489
 490 static int rose_listen(struct socket *sock, int backlog)
 491 {
 492         struct sock *sk = sock->sk;
 493
 494         if (sk->sk_state != TCP_LISTEN) {
 495                 struct rose_sock *rose = rose_sk(sk);
 496
 497                 rose->dest_ndigis = 0;
 498                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 499                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 500                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 501                 sk->sk_max_ack_backlog = backlog;
 502                 sk->sk_state           = TCP_LISTEN;
 503                 return 0;
 504         }
 505
 506         return -EOPNOTSUPP;
 507 }
 508
 509 static struct proto rose_proto = {
 510         .name     = "ROSE",
 511         .owner    = THIS_MODULE,
 512         .obj_size = sizeof(struct rose_sock),
 513 };
 514
 515 static int rose_create(struct net *net, struct socket *sock, int protocol,
 516                        int kern)
 517 {
 518         struct sock *sk;
 519         struct rose_sock *rose;
 520
 521         if (!net_eq(net, &init_net))
 522                 return -EAFNOSUPPORT;
 523
 524         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 525                 return -ESOCKTNOSUPPORT;
 526
 527         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 528         if (sk == NULL)
 529                 return -ENOMEM;
 530
 531         rose = rose_sk(sk);
 532
 533         sock_init_data(sock, sk);
 534
 535         skb_queue_head_init(&rose->ack_queue);
 536 #ifdef M_BIT
 537         skb_queue_head_init(&rose->frag_queue);
 538         rose->fraglen    = 0;
 539 #endif
 540
 541         sock->ops    = &rose_proto_ops;
 542         sk->sk_protocol = protocol;
 543
 544         init_timer(&rose->timer);
 545         init_timer(&rose->idletimer);
 546
 547         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 548         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 549         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 550         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 551         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 552
 553         rose->state = ROSE_STATE_0;
 554
 555         return 0;
 556 }
 557
 558 static struct sock *rose_make_new(struct sock *osk)
 559 {
 560         struct sock *sk;
 561         struct rose_sock *rose, *orose;
 562
 563         if (osk->sk_type != SOCK_SEQPACKET)
 564                 return NULL;
 565
 566         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
 567         if (sk == NULL)
 568                 return NULL;
 569
 570         rose = rose_sk(sk);
 571
 572         sock_init_data(NULL, sk);
 573
 574         skb_queue_head_init(&rose->ack_queue);
 575 #ifdef M_BIT
 576         skb_queue_head_init(&rose->frag_queue);
 577         rose->fraglen  = 0;
 578 #endif
 579
 580         sk->sk_type     = osk->sk_type;
 581         sk->sk_priority = osk->sk_priority;
 582         sk->sk_protocol = osk->sk_protocol;
 583         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 584         sk->sk_sndbuf   = osk->sk_sndbuf;
 585         sk->sk_state    = TCP_ESTABLISHED;
 586         sock_copy_flags(sk, osk);
 587
 588         init_timer(&rose->timer);
 589         init_timer(&rose->idletimer);
 590
 591         orose           = rose_sk(osk);
 592         rose->t1        = orose->t1;
 593         rose->t2        = orose->t2;
 594         rose->t3        = orose->t3;
 595         rose->hb        = orose->hb;
 596         rose->idle      = orose->idle;
 597         rose->defer     = orose->defer;
 598         rose->device    = orose->device;
 599         rose->qbitincl  = orose->qbitincl;
 600
 601         return sk;
 602 }
 603
 604 static int rose_release(struct socket *sock)
 605 {
 606         struct sock *sk = sock->sk;
 607         struct rose_sock *rose;
 608
 609         if (sk == NULL) return 0;
 610
 611         sock_hold(sk);
 612         sock_orphan(sk);
 613         lock_sock(sk);
 614         rose = rose_sk(sk);
 615
 616         switch (rose->state) {
 617         case ROSE_STATE_0:
 618                 release_sock(sk);
 619                 rose_disconnect(sk, 0, -1, -1);
 620                 lock_sock(sk);
 621                 rose_destroy_socket(sk);
 622                 break;
 623
 624         case ROSE_STATE_2:
 625                 rose->neighbour->use--;
 626                 release_sock(sk);
 627                 rose_disconnect(sk, 0, -1, -1);
 628                 lock_sock(sk);
 629                 rose_destroy_socket(sk);
 630                 break;
 631
 632         case ROSE_STATE_1:
 633         case ROSE_STATE_3:
 634         case ROSE_STATE_4:
 635         case ROSE_STATE_5:
 636                 rose_clear_queues(sk);
 637                 rose_stop_idletimer(sk);
 638                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 639                 rose_start_t3timer(sk);
 640                 rose->state  = ROSE_STATE_2;
 641                 sk->sk_state    = TCP_CLOSE;
 642                 sk->sk_shutdown |= SEND_SHUTDOWN;
 643                 sk->sk_state_change(sk);
 644                 sock_set_flag(sk, SOCK_DEAD);
 645                 sock_set_flag(sk, SOCK_DESTROY);
 646                 break;
 647
 648         default:
 649                 break;
 650         }
 651
 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                         return -EACCES;
 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 {
 879         struct sk_buff *skb;
 880         struct sock *newsk;
 881         DEFINE_WAIT(wait);
 882         struct sock *sk;
 883         int err = 0;
 884
 885         if ((sk = sock->sk) == NULL)
 886                 return -EINVAL;
 887
 888         lock_sock(sk);
 889         if (sk->sk_type != SOCK_SEQPACKET) {
 890                 err = -EOPNOTSUPP;
 891                 goto out_release;
 892         }
 893
 894         if (sk->sk_state != TCP_LISTEN) {
 895                 err = -EINVAL;
 896                 goto out_release;
 897         }
 898
 899         /*
 900          *      The write queue this time is holding sockets ready to use
 901          *      hooked into the SABM we saved
 902          */
 903         for (;;) {
 904                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 905
 906                 skb = skb_dequeue(&sk->sk_receive_queue);
 907                 if (skb)
 908                         break;
 909
 910                 if (flags & O_NONBLOCK) {
 911                         err = -EWOULDBLOCK;
 912                         break;
 913                 }
 914                 if (!signal_pending(current)) {
 915                         release_sock(sk);
 916                         schedule();
 917                         lock_sock(sk);
 918                         continue;
 919                 }
 920                 err = -ERESTARTSYS;
 921                 break;
 922         }
 923         finish_wait(sk_sleep(sk), &wait);
 924         if (err)
 925                 goto out_release;
 926
 927         newsk = skb->sk;
 928         sock_graft(newsk, newsock);
 929
 930         /* Now attach up the new socket */
 931         skb->sk = NULL;
 932         kfree_skb(skb);
 933         sk->sk_ack_backlog--;
 934
 935 out_release:
 936         release_sock(sk);
 937
 938         return err;
 939 }
 940
 941 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 942         int *uaddr_len, int peer)
 943 {
 944         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 945         struct sock *sk = sock->sk;
 946         struct rose_sock *rose = rose_sk(sk);
 947         int n;
 948
 949         memset(srose, 0, sizeof(*srose));
 950         if (peer != 0) {
 951                 if (sk->sk_state != TCP_ESTABLISHED)
 952                         return -ENOTCONN;
 953                 srose->srose_family = AF_ROSE;
 954                 srose->srose_addr   = rose->dest_addr;
 955                 srose->srose_call   = rose->dest_call;
 956                 srose->srose_ndigis = rose->dest_ndigis;
 957                 for (n = 0; n < rose->dest_ndigis; n++)
 958                         srose->srose_digis[n] = rose->dest_digis[n];
 959         } else {
 960                 srose->srose_family = AF_ROSE;
 961                 srose->srose_addr   = rose->source_addr;
 962                 srose->srose_call   = rose->source_call;
 963                 srose->srose_ndigis = rose->source_ndigis;
 964                 for (n = 0; n < rose->source_ndigis; n++)
 965                         srose->srose_digis[n] = rose->source_digis[n];
 966         }
 967
 968         *uaddr_len = sizeof(struct full_sockaddr_rose);
 969         return 0;
 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, skb->len);
1049
1050         return 1;
1051 }
1052
1053 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1054                         struct msghdr *msg, size_t len)
1055 {
1056         struct sock *sk = sock->sk;
1057         struct rose_sock *rose = rose_sk(sk);
1058         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1059         int err;
1060         struct full_sockaddr_rose srose;
1061         struct sk_buff *skb;
1062         unsigned char *asmptr;
1063         int n, size, qbit = 0;
1064
1065         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1066                 return -EINVAL;
1067
1068         if (sock_flag(sk, SOCK_ZAPPED))
1069                 return -EADDRNOTAVAIL;
1070
1071         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1072                 send_sig(SIGPIPE, current, 0);
1073                 return -EPIPE;
1074         }
1075
1076         if (rose->neighbour == NULL || rose->device == NULL)
1077                 return -ENETUNREACH;
1078
1079         if (usrose != NULL) {
1080                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1081                         return -EINVAL;
1082                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1083                 memcpy(&srose, usrose, msg->msg_namelen);
1084                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1085                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1086                         return -EISCONN;
1087                 if (srose.srose_ndigis != rose->dest_ndigis)
1088                         return -EISCONN;
1089                 if (srose.srose_ndigis == rose->dest_ndigis) {
1090                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1091                                 if (ax25cmp(&rose->dest_digis[n],
1092                                             &srose.srose_digis[n]))
1093                                         return -EISCONN;
1094                 }
1095                 if (srose.srose_family != AF_ROSE)
1096                         return -EINVAL;
1097         } else {
1098                 if (sk->sk_state != TCP_ESTABLISHED)
1099                         return -ENOTCONN;
1100
1101                 srose.srose_family = AF_ROSE;
1102                 srose.srose_addr   = rose->dest_addr;
1103                 srose.srose_call   = rose->dest_call;
1104                 srose.srose_ndigis = rose->dest_ndigis;
1105                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1106                         srose.srose_digis[n] = rose->dest_digis[n];
1107         }
1108
1109         /* Build a packet */
1110         /* Sanity check the packet size */
1111         if (len > 65535)
1112                 return -EMSGSIZE;
1113
1114         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1115
1116         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1117                 return err;
1118
1119         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1120
1121         /*
1122          *      Put the data on the end
1123          */
1124
1125         skb_reset_transport_header(skb);
1126         skb_put(skb, len);
1127
1128         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1129         if (err) {
1130                 kfree_skb(skb);
1131                 return err;
1132         }
1133
1134         /*
1135          *      If the Q BIT Include socket option is in force, the first
1136          *      byte of the user data is the logical value of the Q Bit.
1137          */
1138         if (rose->qbitincl) {
1139                 qbit = skb->data[0];
1140                 skb_pull(skb, 1);
1141         }
1142
1143         /*
1144          *      Push down the ROSE header
1145          */
1146         asmptr = skb_push(skb, ROSE_MIN_LEN);
1147
1148         /* Build a ROSE Network header */
1149         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1150         asmptr[1] = (rose->lci >> 0) & 0xFF;
1151         asmptr[2] = ROSE_DATA;
1152
1153         if (qbit)
1154                 asmptr[0] |= ROSE_Q_BIT;
1155
1156         if (sk->sk_state != TCP_ESTABLISHED) {
1157                 kfree_skb(skb);
1158                 return -ENOTCONN;
1159         }
1160
1161 #ifdef M_BIT
1162 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1163         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1164                 unsigned char header[ROSE_MIN_LEN];
1165                 struct sk_buff *skbn;
1166                 int frontlen;
1167                 int lg;
1168
1169                 /* Save a copy of the Header */
1170                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1171                 skb_pull(skb, ROSE_MIN_LEN);
1172
1173                 frontlen = skb_headroom(skb);
1174
1175                 while (skb->len > 0) {
1176                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1177                                 kfree_skb(skb);
1178                                 return err;
1179                         }
1180
1181                         skbn->sk   = sk;
1182                         skbn->free = 1;
1183                         skbn->arp  = 1;
1184
1185                         skb_reserve(skbn, frontlen);
1186
1187                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1188
1189                         /* Copy the user data */
1190                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1191                         skb_pull(skb, lg);
1192
1193                         /* Duplicate the Header */
1194                         skb_push(skbn, ROSE_MIN_LEN);
1195                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1196
1197                         if (skb->len > 0)
1198                                 skbn->data[2] |= M_BIT;
1199
1200                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1201                 }
1202
1203                 skb->free = 1;
1204                 kfree_skb(skb);
1205         } else {
1206                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1207         }
1208 #else
1209         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1210 #endif
1211
1212         rose_kick(sk);
1213
1214         return len;
1215 }
1216
1217
1218 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1219                         struct msghdr *msg, size_t size, int flags)
1220 {
1221         struct sock *sk = sock->sk;
1222         struct rose_sock *rose = rose_sk(sk);
1223         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1224         size_t copied;
1225         unsigned char *asmptr;
1226         struct sk_buff *skb;
1227         int n, er, qbit;
1228
1229         /*
1230          * This works for seqpacket too. The receiver has ordered the queue for
1231          * us! We do one quick check first though
1232          */
1233         if (sk->sk_state != TCP_ESTABLISHED)
1234                 return -ENOTCONN;
1235
1236         /* Now we can treat all alike */
1237         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1238                 return er;
1239
1240         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1241
1242         skb_pull(skb, ROSE_MIN_LEN);
1243
1244         if (rose->qbitincl) {
1245                 asmptr  = skb_push(skb, 1);
1246                 *asmptr = qbit;
1247         }
1248
1249         skb_reset_transport_header(skb);
1250         copied     = skb->len;
1251
1252         if (copied > size) {
1253                 copied = size;
1254                 msg->msg_flags |= MSG_TRUNC;
1255         }
1256
1257         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1258
1259         if (srose != NULL) {
1260                 srose->srose_family = AF_ROSE;
1261                 srose->srose_addr   = rose->dest_addr;
1262                 srose->srose_call   = rose->dest_call;
1263                 srose->srose_ndigis = rose->dest_ndigis;
1264                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1265                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1266                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1267                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1268                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1269                 } else {
1270                         if (rose->dest_ndigis >= 1) {
1271                                 srose->srose_ndigis = 1;
1272                                 srose->srose_digi = rose->dest_digis[0];
1273                         }
1274                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1275                 }
1276         }
1277
1278         skb_free_datagram(sk, skb);
1279
1280         return copied;
1281 }
1282
1283
1284 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1285 {
1286         struct sock *sk = sock->sk;
1287         struct rose_sock *rose = rose_sk(sk);
1288         void __user *argp = (void __user *)arg;
1289
1290         switch (cmd) {
1291         case TIOCOUTQ: {
1292                 long amount;
1293
1294                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1295                 if (amount < 0)
1296                         amount = 0;
1297                 return put_user(amount, (unsigned int __user *) argp);
1298         }
1299
1300         case TIOCINQ: {
1301                 struct sk_buff *skb;
1302                 long amount = 0L;
1303                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1304                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1305                         amount = skb->len;
1306                 return put_user(amount, (unsigned int __user *) argp);
1307         }
1308
1309         case SIOCGSTAMP:
1310                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1311
1312         case SIOCGSTAMPNS:
1313                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1314
1315         case SIOCGIFADDR:
1316         case SIOCSIFADDR:
1317         case SIOCGIFDSTADDR:
1318         case SIOCSIFDSTADDR:
1319         case SIOCGIFBRDADDR:
1320         case SIOCSIFBRDADDR:
1321         case SIOCGIFNETMASK:
1322         case SIOCSIFNETMASK:
1323         case SIOCGIFMETRIC:
1324         case SIOCSIFMETRIC:
1325                 return -EINVAL;
1326
1327         case SIOCADDRT:
1328         case SIOCDELRT:
1329         case SIOCRSCLRRT:
1330                 if (!capable(CAP_NET_ADMIN))
1331                         return -EPERM;
1332                 return rose_rt_ioctl(cmd, argp);
1333
1334         case SIOCRSGCAUSE: {
1335                 struct rose_cause_struct rose_cause;
1336                 rose_cause.cause      = rose->cause;
1337                 rose_cause.diagnostic = rose->diagnostic;
1338                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1339         }
1340
1341         case SIOCRSSCAUSE: {
1342                 struct rose_cause_struct rose_cause;
1343                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1344                         return -EFAULT;
1345                 rose->cause      = rose_cause.cause;
1346                 rose->diagnostic = rose_cause.diagnostic;
1347                 return 0;
1348         }
1349
1350         case SIOCRSSL2CALL:
1351                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1352                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1353                         ax25_listen_release(&rose_callsign, NULL);
1354                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1355                         return -EFAULT;
1356                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1357                         return ax25_listen_register(&rose_callsign, NULL);
1358
1359                 return 0;
1360
1361         case SIOCRSGL2CALL:
1362                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1363
1364         case SIOCRSACCEPT:
1365                 if (rose->state == ROSE_STATE_5) {
1366                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1367                         rose_start_idletimer(sk);
1368                         rose->condition = 0x00;
1369                         rose->vs        = 0;
1370                         rose->va        = 0;
1371                         rose->vr        = 0;
1372                         rose->vl        = 0;
1373                         rose->state     = ROSE_STATE_3;
1374                 }
1375                 return 0;
1376
1377         default:
1378                 return -ENOIOCTLCMD;
1379         }
1380
1381         return 0;
1382 }
1383
1384 #ifdef CONFIG_PROC_FS
1385 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1386         __acquires(rose_list_lock)
1387 {
1388         spin_lock_bh(&rose_list_lock);
1389         return seq_hlist_start_head(&rose_list, *pos);
1390 }
1391
1392 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1393 {
1394         return seq_hlist_next(v, &rose_list, pos);
1395 }
1396
1397 static void rose_info_stop(struct seq_file *seq, void *v)
1398         __releases(rose_list_lock)
1399 {
1400         spin_unlock_bh(&rose_list_lock);
1401 }
1402
1403 static int rose_info_show(struct seq_file *seq, void *v)
1404 {
1405         char buf[11], rsbuf[11];
1406
1407         if (v == SEQ_START_TOKEN)
1408                 seq_puts(seq,
1409                          "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");
1410
1411         else {
1412                 struct sock *s = sk_entry(v);
1413                 struct rose_sock *rose = rose_sk(s);
1414                 const char *devname, *callsign;
1415                 const struct net_device *dev = rose->device;
1416
1417                 if (!dev)
1418                         devname = "???";
1419                 else
1420                         devname = dev->name;
1421
1422                 seq_printf(seq, "%-10s %-9s ",
1423                            rose2asc(rsbuf, &rose->dest_addr),
1424                            ax2asc(buf, &rose->dest_call));
1425
1426                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1427                         callsign = "??????-?";
1428                 else
1429                         callsign = ax2asc(buf, &rose->source_call);
1430
1431                 seq_printf(seq,
1432                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1433                         rose2asc(rsbuf, &rose->source_addr),
1434                         callsign,
1435                         devname,
1436                         rose->lci & 0x0FFF,
1437                         (rose->neighbour) ? rose->neighbour->number : 0,
1438                         rose->state,
1439                         rose->vs,
1440                         rose->vr,
1441                         rose->va,
1442                         ax25_display_timer(&rose->timer) / HZ,
1443                         rose->t1 / HZ,
1444                         rose->t2 / HZ,
1445                         rose->t3 / HZ,
1446                         rose->hb / HZ,
1447                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1448                         rose->idle / (60 * HZ),
1449                         sk_wmem_alloc_get(s),
1450                         sk_rmem_alloc_get(s),
1451                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1452         }
1453
1454         return 0;
1455 }
1456
1457 static const struct seq_operations rose_info_seqops = {
1458         .start = rose_info_start,
1459         .next = rose_info_next,
1460         .stop = rose_info_stop,
1461         .show = rose_info_show,
1462 };
1463
1464 static int rose_info_open(struct inode *inode, struct file *file)
1465 {
1466         return seq_open(file, &rose_info_seqops);
1467 }
1468
1469 static const struct file_operations rose_info_fops = {
1470         .owner = THIS_MODULE,
1471         .open = rose_info_open,
1472         .read = seq_read,
1473         .llseek = seq_lseek,
1474         .release = seq_release,
1475 };
1476 #endif  /* CONFIG_PROC_FS */
1477
1478 static const struct net_proto_family rose_family_ops = {
1479         .family         =       PF_ROSE,
1480         .create         =       rose_create,
1481         .owner          =       THIS_MODULE,
1482 };
1483
1484 static const struct proto_ops rose_proto_ops = {
1485         .family         =       PF_ROSE,
1486         .owner          =       THIS_MODULE,
1487         .release        =       rose_release,
1488         .bind           =       rose_bind,
1489         .connect        =       rose_connect,
1490         .socketpair     =       sock_no_socketpair,
1491         .accept         =       rose_accept,
1492         .getname        =       rose_getname,
1493         .poll           =       datagram_poll,
1494         .ioctl          =       rose_ioctl,
1495         .listen         =       rose_listen,
1496         .shutdown       =       sock_no_shutdown,
1497         .setsockopt     =       rose_setsockopt,
1498         .getsockopt     =       rose_getsockopt,
1499         .sendmsg        =       rose_sendmsg,
1500         .recvmsg        =       rose_recvmsg,
1501         .mmap           =       sock_no_mmap,
1502         .sendpage       =       sock_no_sendpage,
1503 };
1504
1505 static struct notifier_block rose_dev_notifier = {
1506         .notifier_call  =       rose_device_event,
1507 };
1508
1509 static struct net_device **dev_rose;
1510
1511 static struct ax25_protocol rose_pid = {
1512         .pid    = AX25_P_ROSE,
1513         .func   = rose_route_frame
1514 };
1515
1516 static struct ax25_linkfail rose_linkfail_notifier = {
1517         .func   = rose_link_failed
1518 };
1519
1520 static int __init rose_proto_init(void)
1521 {
1522         int i;
1523         int rc;
1524
1525         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1526                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1527                 rc = -EINVAL;
1528                 goto out;
1529         }
1530
1531         rc = proto_register(&rose_proto, 0);
1532         if (rc != 0)
1533                 goto out;
1534
1535         rose_callsign = null_ax25_address;
1536
1537         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1538         if (dev_rose == NULL) {
1539                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1540                 rc = -ENOMEM;
1541                 goto out_proto_unregister;
1542         }
1543
1544         for (i = 0; i < rose_ndevs; i++) {
1545                 struct net_device *dev;
1546                 char name[IFNAMSIZ];
1547
1548                 sprintf(name, "rose%d", i);
1549                 dev = alloc_netdev(0, name, rose_setup);
1550                 if (!dev) {
1551                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1552                         rc = -ENOMEM;
1553                         goto fail;
1554                 }
1555                 rc = register_netdev(dev);
1556                 if (rc) {
1557                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1558                         free_netdev(dev);
1559                         goto fail;
1560                 }
1561                 rose_set_lockdep_key(dev);
1562                 dev_rose[i] = dev;
1563         }
1564
1565         sock_register(&rose_family_ops);
1566         register_netdevice_notifier(&rose_dev_notifier);
1567
1568         ax25_register_pid(&rose_pid);
1569         ax25_linkfail_register(&rose_linkfail_notifier);
1570
1571 #ifdef CONFIG_SYSCTL
1572         rose_register_sysctl();
1573 #endif
1574         rose_loopback_init();
1575
1576         rose_add_loopback_neigh();
1577
1578         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1579         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1580         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1581         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1582 out:
1583         return rc;
1584 fail:
1585         while (--i >= 0) {
1586                 unregister_netdev(dev_rose[i]);
1587                 free_netdev(dev_rose[i]);
1588         }
1589         kfree(dev_rose);
1590 out_proto_unregister:
1591         proto_unregister(&rose_proto);
1592         goto out;
1593 }
1594 module_init(rose_proto_init);
1595
1596 module_param(rose_ndevs, int, 0);
1597 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1598
1599 MODULE_AUTHOR("Jonathan Naylor G4KLX <[email protected]>");
1600 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1601 MODULE_LICENSE("GPL");
1602 MODULE_ALIAS_NETPROTO(PF_ROSE);
1603
1604 static void __exit rose_exit(void)
1605 {
1606         int i;
1607
1608         proc_net_remove(&init_net, "rose");
1609         proc_net_remove(&init_net, "rose_neigh");
1610         proc_net_remove(&init_net, "rose_nodes");
1611         proc_net_remove(&init_net, "rose_routes");
1612         rose_loopback_clear();
1613
1614         rose_rt_free();
1615
1616         ax25_protocol_release(AX25_P_ROSE);
1617         ax25_linkfail_release(&rose_linkfail_notifier);
1618
1619         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1620                 ax25_listen_release(&rose_callsign, NULL);
1621
1622 #ifdef CONFIG_SYSCTL
1623         rose_unregister_sysctl();
1624 #endif
1625         unregister_netdevice_notifier(&rose_dev_notifier);
1626
1627         sock_unregister(PF_ROSE);
1628
1629         for (i = 0; i < rose_ndevs; i++) {
1630                 struct net_device *dev = dev_rose[i];
1631
1632                 if (dev) {
1633                         unregister_netdev(dev);
1634                         free_netdev(dev);
1635                 }
1636         }
1637
1638         kfree(dev_rose);
1639         proto_unregister(&rose_proto);
1640 }
1641
1642 module_exit(rose_exit);