net/rose/af_rose.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   8  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   9  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
  10  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
  11  */
  12
  13 #include <linux/capability.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/types.h>
  19 #include <linux/socket.h>
  20 #include <linux/in.h>
  21 #include <linux/slab.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched.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
 169         spin_lock_bh(&rose_list_lock);
 170         sk_for_each(s, &rose_list) {
 171                 struct rose_sock *rose = rose_sk(s);
 172
 173                 if (rose->neighbour == neigh) {
 174                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 175                         rose->neighbour->use--;
 176                         rose->neighbour = NULL;
 177                 }
 178         }
 179         spin_unlock_bh(&rose_list_lock);
 180 }
 181
 182 /*
 183  *      Kill all bound sockets on a dropped device.
 184  */
 185 static void rose_kill_by_device(struct net_device *dev)
 186 {
 187         struct sock *s;
 188
 189         spin_lock_bh(&rose_list_lock);
 190         sk_for_each(s, &rose_list) {
 191                 struct rose_sock *rose = rose_sk(s);
 192
 193                 if (rose->device == dev) {
 194                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 195                         if (rose->neighbour)
 196                                 rose->neighbour->use--;
 197                         rose->device = NULL;
 198                 }
 199         }
 200         spin_unlock_bh(&rose_list_lock);
 201 }
 202
 203 /*
 204  *      Handle device status changes.
 205  */
 206 static int rose_device_event(struct notifier_block *this,
 207                              unsigned long event, void *ptr)
 208 {
 209         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 210
 211         if (!net_eq(dev_net(dev), &init_net))
 212                 return NOTIFY_DONE;
 213
 214         if (event != NETDEV_DOWN)
 215                 return NOTIFY_DONE;
 216
 217         switch (dev->type) {
 218         case ARPHRD_ROSE:
 219                 rose_kill_by_device(dev);
 220                 break;
 221         case ARPHRD_AX25:
 222                 rose_link_device_down(dev);
 223                 rose_rt_device_down(dev);
 224                 break;
 225         }
 226
 227         return NOTIFY_DONE;
 228 }
 229
 230 /*
 231  *      Add a socket to the bound sockets list.
 232  */
 233 static void rose_insert_socket(struct sock *sk)
 234 {
 235
 236         spin_lock_bh(&rose_list_lock);
 237         sk_add_node(sk, &rose_list);
 238         spin_unlock_bh(&rose_list_lock);
 239 }
 240
 241 /*
 242  *      Find a socket that wants to accept the Call Request we just
 243  *      received.
 244  */
 245 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 246 {
 247         struct sock *s;
 248
 249         spin_lock_bh(&rose_list_lock);
 250         sk_for_each(s, &rose_list) {
 251                 struct rose_sock *rose = rose_sk(s);
 252
 253                 if (!rosecmp(&rose->source_addr, addr) &&
 254                     !ax25cmp(&rose->source_call, call) &&
 255                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 256                         goto found;
 257         }
 258
 259         sk_for_each(s, &rose_list) {
 260                 struct rose_sock *rose = rose_sk(s);
 261
 262                 if (!rosecmp(&rose->source_addr, addr) &&
 263                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 264                     s->sk_state == TCP_LISTEN)
 265                         goto found;
 266         }
 267         s = NULL;
 268 found:
 269         spin_unlock_bh(&rose_list_lock);
 270         return s;
 271 }
 272
 273 /*
 274  *      Find a connected ROSE socket given my LCI and device.
 275  */
 276 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 277 {
 278         struct sock *s;
 279
 280         spin_lock_bh(&rose_list_lock);
 281         sk_for_each(s, &rose_list) {
 282                 struct rose_sock *rose = rose_sk(s);
 283
 284                 if (rose->lci == lci && rose->neighbour == neigh)
 285                         goto found;
 286         }
 287         s = NULL;
 288 found:
 289         spin_unlock_bh(&rose_list_lock);
 290         return s;
 291 }
 292
 293 /*
 294  *      Find a unique LCI for a given device.
 295  */
 296 unsigned int rose_new_lci(struct rose_neigh *neigh)
 297 {
 298         int lci;
 299
 300         if (neigh->dce_mode) {
 301                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 302                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 303                                 return lci;
 304         } else {
 305                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 306                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 307                                 return lci;
 308         }
 309
 310         return 0;
 311 }
 312
 313 /*
 314  *      Deferred destroy.
 315  */
 316 void rose_destroy_socket(struct sock *);
 317
 318 /*
 319  *      Handler for deferred kills.
 320  */
 321 static void rose_destroy_timer(unsigned long data)
 322 {
 323         rose_destroy_socket((struct sock *)data);
 324 }
 325
 326 /*
 327  *      This is called from user mode and the timers. Thus it protects itself
 328  *      against interrupt users but doesn't worry about being called during
 329  *      work.  Once it is removed from the queue no interrupt or bottom half
 330  *      will touch it and we are (fairly 8-) ) safe.
 331  */
 332 void rose_destroy_socket(struct sock *sk)
 333 {
 334         struct sk_buff *skb;
 335
 336         rose_remove_socket(sk);
 337         rose_stop_heartbeat(sk);
 338         rose_stop_idletimer(sk);
 339         rose_stop_timer(sk);
 340
 341         rose_clear_queues(sk);          /* Flush the queues */
 342
 343         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 344                 if (skb->sk != sk) {    /* A pending connection */
 345                         /* Queue the unaccepted socket for death */
 346                         sock_set_flag(skb->sk, SOCK_DEAD);
 347                         rose_start_heartbeat(skb->sk);
 348                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 349                 }
 350
 351                 kfree_skb(skb);
 352         }
 353
 354         if (sk_has_allocations(sk)) {
 355                 /* Defer: outstanding buffers */
 356                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 357                                 (unsigned long)sk);
 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         char __user *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 (get_user(opt, (int __user *)optval))
 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);
 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         init_timer(&rose->timer);
 542         init_timer(&rose->idletimer);
 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);
 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         init_timer(&rose->timer);
 586         init_timer(&rose->idletimer);
 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         rose->qbitincl  = orose->qbitincl;
 597
 598         return sk;
 599 }
 600
 601 static int rose_release(struct socket *sock)
 602 {
 603         struct sock *sk = sock->sk;
 604         struct rose_sock *rose;
 605
 606         if (sk == NULL) return 0;
 607
 608         sock_hold(sk);
 609         sock_orphan(sk);
 610         lock_sock(sk);
 611         rose = rose_sk(sk);
 612
 613         switch (rose->state) {
 614         case ROSE_STATE_0:
 615                 release_sock(sk);
 616                 rose_disconnect(sk, 0, -1, -1);
 617                 lock_sock(sk);
 618                 rose_destroy_socket(sk);
 619                 break;
 620
 621         case ROSE_STATE_2:
 622                 rose->neighbour->use--;
 623                 release_sock(sk);
 624                 rose_disconnect(sk, 0, -1, -1);
 625                 lock_sock(sk);
 626                 rose_destroy_socket(sk);
 627                 break;
 628
 629         case ROSE_STATE_1:
 630         case ROSE_STATE_3:
 631         case ROSE_STATE_4:
 632         case ROSE_STATE_5:
 633                 rose_clear_queues(sk);
 634                 rose_stop_idletimer(sk);
 635                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 636                 rose_start_t3timer(sk);
 637                 rose->state  = ROSE_STATE_2;
 638                 sk->sk_state    = TCP_CLOSE;
 639                 sk->sk_shutdown |= SEND_SHUTDOWN;
 640                 sk->sk_state_change(sk);
 641                 sock_set_flag(sk, SOCK_DEAD);
 642                 sock_set_flag(sk, SOCK_DESTROY);
 643                 break;
 644
 645         default:
 646                 break;
 647         }
 648
 649         sock->sk = NULL;
 650         release_sock(sk);
 651         sock_put(sk);
 652
 653         return 0;
 654 }
 655
 656 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 657 {
 658         struct sock *sk = sock->sk;
 659         struct rose_sock *rose = rose_sk(sk);
 660         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 661         struct net_device *dev;
 662         ax25_address *source;
 663         ax25_uid_assoc *user;
 664         int n;
 665
 666         if (!sock_flag(sk, SOCK_ZAPPED))
 667                 return -EINVAL;
 668
 669         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 670                 return -EINVAL;
 671
 672         if (addr->srose_family != AF_ROSE)
 673                 return -EINVAL;
 674
 675         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 676                 return -EINVAL;
 677
 678         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 679                 return -EINVAL;
 680
 681         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
 682                 return -EADDRNOTAVAIL;
 683
 684         source = &addr->srose_call;
 685
 686         user = ax25_findbyuid(current_euid());
 687         if (user) {
 688                 rose->source_call = user->call;
 689                 ax25_uid_put(user);
 690         } else {
 691                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 692                         return -EACCES;
 693                 rose->source_call   = *source;
 694         }
 695
 696         rose->source_addr   = addr->srose_addr;
 697         rose->device        = dev;
 698         rose->source_ndigis = addr->srose_ndigis;
 699
 700         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 701                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 702                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 703                         rose->source_digis[n] = full_addr->srose_digis[n];
 704         } else {
 705                 if (rose->source_ndigis == 1) {
 706                         rose->source_digis[0] = addr->srose_digi;
 707                 }
 708         }
 709
 710         rose_insert_socket(sk);
 711
 712         sock_reset_flag(sk, SOCK_ZAPPED);
 713
 714         return 0;
 715 }
 716
 717 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 718 {
 719         struct sock *sk = sock->sk;
 720         struct rose_sock *rose = rose_sk(sk);
 721         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 722         unsigned char cause, diagnostic;
 723         struct net_device *dev;
 724         ax25_uid_assoc *user;
 725         int n, err = 0;
 726
 727         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 728                 return -EINVAL;
 729
 730         if (addr->srose_family != AF_ROSE)
 731                 return -EINVAL;
 732
 733         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 734                 return -EINVAL;
 735
 736         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 737                 return -EINVAL;
 738
 739         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 740         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 741                 return -EINVAL;
 742
 743         lock_sock(sk);
 744
 745         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 746                 /* Connect completed during a ERESTARTSYS event */
 747                 sock->state = SS_CONNECTED;
 748                 goto out_release;
 749         }
 750
 751         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 752                 sock->state = SS_UNCONNECTED;
 753                 err = -ECONNREFUSED;
 754                 goto out_release;
 755         }
 756
 757         if (sk->sk_state == TCP_ESTABLISHED) {
 758                 /* No reconnect on a seqpacket socket */
 759                 err = -EISCONN;
 760                 goto out_release;
 761         }
 762
 763         sk->sk_state   = TCP_CLOSE;
 764         sock->state = SS_UNCONNECTED;
 765
 766         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 767                                          &diagnostic, 0);
 768         if (!rose->neighbour) {
 769                 err = -ENETUNREACH;
 770                 goto out_release;
 771         }
 772
 773         rose->lci = rose_new_lci(rose->neighbour);
 774         if (!rose->lci) {
 775                 err = -ENETUNREACH;
 776                 goto out_release;
 777         }
 778
 779         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 780                 sock_reset_flag(sk, SOCK_ZAPPED);
 781
 782                 if ((dev = rose_dev_first()) == NULL) {
 783                         err = -ENETUNREACH;
 784                         goto out_release;
 785                 }
 786
 787                 user = ax25_findbyuid(current_euid());
 788                 if (!user) {
 789                         err = -EINVAL;
 790                         goto out_release;
 791                 }
 792
 793                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 794                 rose->source_call = user->call;
 795                 rose->device      = dev;
 796                 ax25_uid_put(user);
 797
 798                 rose_insert_socket(sk);         /* Finish the bind */
 799         }
 800         rose->dest_addr   = addr->srose_addr;
 801         rose->dest_call   = addr->srose_call;
 802         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 803         rose->dest_ndigis = addr->srose_ndigis;
 804
 805         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 806                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 807                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 808                         rose->dest_digis[n] = full_addr->srose_digis[n];
 809         } else {
 810                 if (rose->dest_ndigis == 1) {
 811                         rose->dest_digis[0] = addr->srose_digi;
 812                 }
 813         }
 814
 815         /* Move to connecting socket, start sending Connect Requests */
 816         sock->state   = SS_CONNECTING;
 817         sk->sk_state     = TCP_SYN_SENT;
 818
 819         rose->state = ROSE_STATE_1;
 820
 821         rose->neighbour->use++;
 822
 823         rose_write_internal(sk, ROSE_CALL_REQUEST);
 824         rose_start_heartbeat(sk);
 825         rose_start_t1timer(sk);
 826
 827         /* Now the loop */
 828         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 829                 err = -EINPROGRESS;
 830                 goto out_release;
 831         }
 832
 833         /*
 834          * A Connect Ack with Choke or timeout or failed routing will go to
 835          * closed.
 836          */
 837         if (sk->sk_state == TCP_SYN_SENT) {
 838                 DEFINE_WAIT(wait);
 839
 840                 for (;;) {
 841                         prepare_to_wait(sk_sleep(sk), &wait,
 842                                         TASK_INTERRUPTIBLE);
 843                         if (sk->sk_state != TCP_SYN_SENT)
 844                                 break;
 845                         if (!signal_pending(current)) {
 846                                 release_sock(sk);
 847                                 schedule();
 848                                 lock_sock(sk);
 849                                 continue;
 850                         }
 851                         err = -ERESTARTSYS;
 852                         break;
 853                 }
 854                 finish_wait(sk_sleep(sk), &wait);
 855
 856                 if (err)
 857                         goto out_release;
 858         }
 859
 860         if (sk->sk_state != TCP_ESTABLISHED) {
 861                 sock->state = SS_UNCONNECTED;
 862                 err = sock_error(sk);   /* Always set at this point */
 863                 goto out_release;
 864         }
 865
 866         sock->state = SS_CONNECTED;
 867
 868 out_release:
 869         release_sock(sk);
 870
 871         return err;
 872 }
 873
 874 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 875 {
 876         struct sk_buff *skb;
 877         struct sock *newsk;
 878         DEFINE_WAIT(wait);
 879         struct sock *sk;
 880         int err = 0;
 881
 882         if ((sk = sock->sk) == NULL)
 883                 return -EINVAL;
 884
 885         lock_sock(sk);
 886         if (sk->sk_type != SOCK_SEQPACKET) {
 887                 err = -EOPNOTSUPP;
 888                 goto out_release;
 889         }
 890
 891         if (sk->sk_state != TCP_LISTEN) {
 892                 err = -EINVAL;
 893                 goto out_release;
 894         }
 895
 896         /*
 897          *      The write queue this time is holding sockets ready to use
 898          *      hooked into the SABM we saved
 899          */
 900         for (;;) {
 901                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 902
 903                 skb = skb_dequeue(&sk->sk_receive_queue);
 904                 if (skb)
 905                         break;
 906
 907                 if (flags & O_NONBLOCK) {
 908                         err = -EWOULDBLOCK;
 909                         break;
 910                 }
 911                 if (!signal_pending(current)) {
 912                         release_sock(sk);
 913                         schedule();
 914                         lock_sock(sk);
 915                         continue;
 916                 }
 917                 err = -ERESTARTSYS;
 918                 break;
 919         }
 920         finish_wait(sk_sleep(sk), &wait);
 921         if (err)
 922                 goto out_release;
 923
 924         newsk = skb->sk;
 925         sock_graft(newsk, newsock);
 926
 927         /* Now attach up the new socket */
 928         skb->sk = NULL;
 929         kfree_skb(skb);
 930         sk->sk_ack_backlog--;
 931
 932 out_release:
 933         release_sock(sk);
 934
 935         return err;
 936 }
 937
 938 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 939         int *uaddr_len, int peer)
 940 {
 941         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 942         struct sock *sk = sock->sk;
 943         struct rose_sock *rose = rose_sk(sk);
 944         int n;
 945
 946         memset(srose, 0, sizeof(*srose));
 947         if (peer != 0) {
 948                 if (sk->sk_state != TCP_ESTABLISHED)
 949                         return -ENOTCONN;
 950                 srose->srose_family = AF_ROSE;
 951                 srose->srose_addr   = rose->dest_addr;
 952                 srose->srose_call   = rose->dest_call;
 953                 srose->srose_ndigis = rose->dest_ndigis;
 954                 for (n = 0; n < rose->dest_ndigis; n++)
 955                         srose->srose_digis[n] = rose->dest_digis[n];
 956         } else {
 957                 srose->srose_family = AF_ROSE;
 958                 srose->srose_addr   = rose->source_addr;
 959                 srose->srose_call   = rose->source_call;
 960                 srose->srose_ndigis = rose->source_ndigis;
 961                 for (n = 0; n < rose->source_ndigis; n++)
 962                         srose->srose_digis[n] = rose->source_digis[n];
 963         }
 964
 965         *uaddr_len = sizeof(struct full_sockaddr_rose);
 966         return 0;
 967 }
 968
 969 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 970 {
 971         struct sock *sk;
 972         struct sock *make;
 973         struct rose_sock *make_rose;
 974         struct rose_facilities_struct facilities;
 975         int n;
 976
 977         skb->sk = NULL;         /* Initially we don't know who it's for */
 978
 979         /*
 980          *      skb->data points to the rose frame start
 981          */
 982         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 983
 984         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
 985                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
 986                                    &facilities)) {
 987                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 988                 return 0;
 989         }
 990
 991         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 992
 993         /*
 994          * We can't accept the Call Request.
 995          */
 996         if (sk == NULL || sk_acceptq_is_full(sk) ||
 997             (make = rose_make_new(sk)) == NULL) {
 998                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 999                 return 0;
1000         }
1001
1002         skb->sk     = make;
1003         make->sk_state = TCP_ESTABLISHED;
1004         make_rose = rose_sk(make);
1005
1006         make_rose->lci           = lci;
1007         make_rose->dest_addr     = facilities.dest_addr;
1008         make_rose->dest_call     = facilities.dest_call;
1009         make_rose->dest_ndigis   = facilities.dest_ndigis;
1010         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1011                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1012         make_rose->source_addr   = facilities.source_addr;
1013         make_rose->source_call   = facilities.source_call;
1014         make_rose->source_ndigis = facilities.source_ndigis;
1015         for (n = 0 ; n < facilities.source_ndigis ; n++)
1016                 make_rose->source_digis[n] = facilities.source_digis[n];
1017         make_rose->neighbour     = neigh;
1018         make_rose->device        = dev;
1019         make_rose->facilities    = facilities;
1020
1021         make_rose->neighbour->use++;
1022
1023         if (rose_sk(sk)->defer) {
1024                 make_rose->state = ROSE_STATE_5;
1025         } else {
1026                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1027                 make_rose->state = ROSE_STATE_3;
1028                 rose_start_idletimer(make);
1029         }
1030
1031         make_rose->condition = 0x00;
1032         make_rose->vs        = 0;
1033         make_rose->va        = 0;
1034         make_rose->vr        = 0;
1035         make_rose->vl        = 0;
1036         sk->sk_ack_backlog++;
1037
1038         rose_insert_socket(make);
1039
1040         skb_queue_head(&sk->sk_receive_queue, skb);
1041
1042         rose_start_heartbeat(make);
1043
1044         if (!sock_flag(sk, SOCK_DEAD))
1045                 sk->sk_data_ready(sk);
1046
1047         return 1;
1048 }
1049
1050 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1051 {
1052         struct sock *sk = sock->sk;
1053         struct rose_sock *rose = rose_sk(sk);
1054         DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1055         int err;
1056         struct full_sockaddr_rose srose;
1057         struct sk_buff *skb;
1058         unsigned char *asmptr;
1059         int n, size, qbit = 0;
1060
1061         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1062                 return -EINVAL;
1063
1064         if (sock_flag(sk, SOCK_ZAPPED))
1065                 return -EADDRNOTAVAIL;
1066
1067         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1068                 send_sig(SIGPIPE, current, 0);
1069                 return -EPIPE;
1070         }
1071
1072         if (rose->neighbour == NULL || rose->device == NULL)
1073                 return -ENETUNREACH;
1074
1075         if (usrose != NULL) {
1076                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1077                         return -EINVAL;
1078                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1079                 memcpy(&srose, usrose, msg->msg_namelen);
1080                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1081                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1082                         return -EISCONN;
1083                 if (srose.srose_ndigis != rose->dest_ndigis)
1084                         return -EISCONN;
1085                 if (srose.srose_ndigis == rose->dest_ndigis) {
1086                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1087                                 if (ax25cmp(&rose->dest_digis[n],
1088                                             &srose.srose_digis[n]))
1089                                         return -EISCONN;
1090                 }
1091                 if (srose.srose_family != AF_ROSE)
1092                         return -EINVAL;
1093         } else {
1094                 if (sk->sk_state != TCP_ESTABLISHED)
1095                         return -ENOTCONN;
1096
1097                 srose.srose_family = AF_ROSE;
1098                 srose.srose_addr   = rose->dest_addr;
1099                 srose.srose_call   = rose->dest_call;
1100                 srose.srose_ndigis = rose->dest_ndigis;
1101                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1102                         srose.srose_digis[n] = rose->dest_digis[n];
1103         }
1104
1105         /* Build a packet */
1106         /* Sanity check the packet size */
1107         if (len > 65535)
1108                 return -EMSGSIZE;
1109
1110         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1111
1112         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1113                 return err;
1114
1115         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1116
1117         /*
1118          *      Put the data on the end
1119          */
1120
1121         skb_reset_transport_header(skb);
1122         skb_put(skb, len);
1123
1124         err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1125         if (err) {
1126                 kfree_skb(skb);
1127                 return err;
1128         }
1129
1130         /*
1131          *      If the Q BIT Include socket option is in force, the first
1132          *      byte of the user data is the logical value of the Q Bit.
1133          */
1134         if (rose->qbitincl) {
1135                 qbit = skb->data[0];
1136                 skb_pull(skb, 1);
1137         }
1138
1139         /*
1140          *      Push down the ROSE header
1141          */
1142         asmptr = skb_push(skb, ROSE_MIN_LEN);
1143
1144         /* Build a ROSE Network header */
1145         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1146         asmptr[1] = (rose->lci >> 0) & 0xFF;
1147         asmptr[2] = ROSE_DATA;
1148
1149         if (qbit)
1150                 asmptr[0] |= ROSE_Q_BIT;
1151
1152         if (sk->sk_state != TCP_ESTABLISHED) {
1153                 kfree_skb(skb);
1154                 return -ENOTCONN;
1155         }
1156
1157 #ifdef M_BIT
1158 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1159         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1160                 unsigned char header[ROSE_MIN_LEN];
1161                 struct sk_buff *skbn;
1162                 int frontlen;
1163                 int lg;
1164
1165                 /* Save a copy of the Header */
1166                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1167                 skb_pull(skb, ROSE_MIN_LEN);
1168
1169                 frontlen = skb_headroom(skb);
1170
1171                 while (skb->len > 0) {
1172                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1173                                 kfree_skb(skb);
1174                                 return err;
1175                         }
1176
1177                         skbn->sk   = sk;
1178                         skbn->free = 1;
1179                         skbn->arp  = 1;
1180
1181                         skb_reserve(skbn, frontlen);
1182
1183                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1184
1185                         /* Copy the user data */
1186                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1187                         skb_pull(skb, lg);
1188
1189                         /* Duplicate the Header */
1190                         skb_push(skbn, ROSE_MIN_LEN);
1191                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1192
1193                         if (skb->len > 0)
1194                                 skbn->data[2] |= M_BIT;
1195
1196                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1197                 }
1198
1199                 skb->free = 1;
1200                 kfree_skb(skb);
1201         } else {
1202                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1203         }
1204 #else
1205         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1206 #endif
1207
1208         rose_kick(sk);
1209
1210         return len;
1211 }
1212
1213
1214 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1215                         int flags)
1216 {
1217         struct sock *sk = sock->sk;
1218         struct rose_sock *rose = rose_sk(sk);
1219         size_t copied;
1220         unsigned char *asmptr;
1221         struct sk_buff *skb;
1222         int n, er, qbit;
1223
1224         /*
1225          * This works for seqpacket too. The receiver has ordered the queue for
1226          * us! We do one quick check first though
1227          */
1228         if (sk->sk_state != TCP_ESTABLISHED)
1229                 return -ENOTCONN;
1230
1231         /* Now we can treat all alike */
1232         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233                 return er;
1234
1235         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1236
1237         skb_pull(skb, ROSE_MIN_LEN);
1238
1239         if (rose->qbitincl) {
1240                 asmptr  = skb_push(skb, 1);
1241                 *asmptr = qbit;
1242         }
1243
1244         skb_reset_transport_header(skb);
1245         copied     = skb->len;
1246
1247         if (copied > size) {
1248                 copied = size;
1249                 msg->msg_flags |= MSG_TRUNC;
1250         }
1251
1252         skb_copy_datagram_msg(skb, 0, msg, copied);
1253
1254         if (msg->msg_name) {
1255                 struct sockaddr_rose *srose;
1256                 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1257                                  msg->msg_name);
1258
1259                 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1260                 srose = msg->msg_name;
1261                 srose->srose_family = AF_ROSE;
1262                 srose->srose_addr   = rose->dest_addr;
1263                 srose->srose_call   = rose->dest_call;
1264                 srose->srose_ndigis = rose->dest_ndigis;
1265                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1266                         full_srose->srose_digis[n] = rose->dest_digis[n];
1267                 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1268         }
1269
1270         skb_free_datagram(sk, skb);
1271
1272         return copied;
1273 }
1274
1275
1276 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1277 {
1278         struct sock *sk = sock->sk;
1279         struct rose_sock *rose = rose_sk(sk);
1280         void __user *argp = (void __user *)arg;
1281
1282         switch (cmd) {
1283         case TIOCOUTQ: {
1284                 long amount;
1285
1286                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1287                 if (amount < 0)
1288                         amount = 0;
1289                 return put_user(amount, (unsigned int __user *) argp);
1290         }
1291
1292         case TIOCINQ: {
1293                 struct sk_buff *skb;
1294                 long amount = 0L;
1295                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1296                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1297                         amount = skb->len;
1298                 return put_user(amount, (unsigned int __user *) argp);
1299         }
1300
1301         case SIOCGSTAMP:
1302                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1303
1304         case SIOCGSTAMPNS:
1305                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1306
1307         case SIOCGIFADDR:
1308         case SIOCSIFADDR:
1309         case SIOCGIFDSTADDR:
1310         case SIOCSIFDSTADDR:
1311         case SIOCGIFBRDADDR:
1312         case SIOCSIFBRDADDR:
1313         case SIOCGIFNETMASK:
1314         case SIOCSIFNETMASK:
1315         case SIOCGIFMETRIC:
1316         case SIOCSIFMETRIC:
1317                 return -EINVAL;
1318
1319         case SIOCADDRT:
1320         case SIOCDELRT:
1321         case SIOCRSCLRRT:
1322                 if (!capable(CAP_NET_ADMIN))
1323                         return -EPERM;
1324                 return rose_rt_ioctl(cmd, argp);
1325
1326         case SIOCRSGCAUSE: {
1327                 struct rose_cause_struct rose_cause;
1328                 rose_cause.cause      = rose->cause;
1329                 rose_cause.diagnostic = rose->diagnostic;
1330                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1331         }
1332
1333         case SIOCRSSCAUSE: {
1334                 struct rose_cause_struct rose_cause;
1335                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1336                         return -EFAULT;
1337                 rose->cause      = rose_cause.cause;
1338                 rose->diagnostic = rose_cause.diagnostic;
1339                 return 0;
1340         }
1341
1342         case SIOCRSSL2CALL:
1343                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1344                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1345                         ax25_listen_release(&rose_callsign, NULL);
1346                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1347                         return -EFAULT;
1348                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1349                         return ax25_listen_register(&rose_callsign, NULL);
1350
1351                 return 0;
1352
1353         case SIOCRSGL2CALL:
1354                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1355
1356         case SIOCRSACCEPT:
1357                 if (rose->state == ROSE_STATE_5) {
1358                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1359                         rose_start_idletimer(sk);
1360                         rose->condition = 0x00;
1361                         rose->vs        = 0;
1362                         rose->va        = 0;
1363                         rose->vr        = 0;
1364                         rose->vl        = 0;
1365                         rose->state     = ROSE_STATE_3;
1366                 }
1367                 return 0;
1368
1369         default:
1370                 return -ENOIOCTLCMD;
1371         }
1372
1373         return 0;
1374 }
1375
1376 #ifdef CONFIG_PROC_FS
1377 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1378         __acquires(rose_list_lock)
1379 {
1380         spin_lock_bh(&rose_list_lock);
1381         return seq_hlist_start_head(&rose_list, *pos);
1382 }
1383
1384 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1385 {
1386         return seq_hlist_next(v, &rose_list, pos);
1387 }
1388
1389 static void rose_info_stop(struct seq_file *seq, void *v)
1390         __releases(rose_list_lock)
1391 {
1392         spin_unlock_bh(&rose_list_lock);
1393 }
1394
1395 static int rose_info_show(struct seq_file *seq, void *v)
1396 {
1397         char buf[11], rsbuf[11];
1398
1399         if (v == SEQ_START_TOKEN)
1400                 seq_puts(seq,
1401                          "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");
1402
1403         else {
1404                 struct sock *s = sk_entry(v);
1405                 struct rose_sock *rose = rose_sk(s);
1406                 const char *devname, *callsign;
1407                 const struct net_device *dev = rose->device;
1408
1409                 if (!dev)
1410                         devname = "???";
1411                 else
1412                         devname = dev->name;
1413
1414                 seq_printf(seq, "%-10s %-9s ",
1415                            rose2asc(rsbuf, &rose->dest_addr),
1416                            ax2asc(buf, &rose->dest_call));
1417
1418                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1419                         callsign = "??????-?";
1420                 else
1421                         callsign = ax2asc(buf, &rose->source_call);
1422
1423                 seq_printf(seq,
1424                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1425                         rose2asc(rsbuf, &rose->source_addr),
1426                         callsign,
1427                         devname,
1428                         rose->lci & 0x0FFF,
1429                         (rose->neighbour) ? rose->neighbour->number : 0,
1430                         rose->state,
1431                         rose->vs,
1432                         rose->vr,
1433                         rose->va,
1434                         ax25_display_timer(&rose->timer) / HZ,
1435                         rose->t1 / HZ,
1436                         rose->t2 / HZ,
1437                         rose->t3 / HZ,
1438                         rose->hb / HZ,
1439                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1440                         rose->idle / (60 * HZ),
1441                         sk_wmem_alloc_get(s),
1442                         sk_rmem_alloc_get(s),
1443                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1444         }
1445
1446         return 0;
1447 }
1448
1449 static const struct seq_operations rose_info_seqops = {
1450         .start = rose_info_start,
1451         .next = rose_info_next,
1452         .stop = rose_info_stop,
1453         .show = rose_info_show,
1454 };
1455
1456 static int rose_info_open(struct inode *inode, struct file *file)
1457 {
1458         return seq_open(file, &rose_info_seqops);
1459 }
1460
1461 static const struct file_operations rose_info_fops = {
1462         .owner = THIS_MODULE,
1463         .open = rose_info_open,
1464         .read = seq_read,
1465         .llseek = seq_lseek,
1466         .release = seq_release,
1467 };
1468 #endif  /* CONFIG_PROC_FS */
1469
1470 static const struct net_proto_family rose_family_ops = {
1471         .family         =       PF_ROSE,
1472         .create         =       rose_create,
1473         .owner          =       THIS_MODULE,
1474 };
1475
1476 static const struct proto_ops rose_proto_ops = {
1477         .family         =       PF_ROSE,
1478         .owner          =       THIS_MODULE,
1479         .release        =       rose_release,
1480         .bind           =       rose_bind,
1481         .connect        =       rose_connect,
1482         .socketpair     =       sock_no_socketpair,
1483         .accept         =       rose_accept,
1484         .getname        =       rose_getname,
1485         .poll           =       datagram_poll,
1486         .ioctl          =       rose_ioctl,
1487         .listen         =       rose_listen,
1488         .shutdown       =       sock_no_shutdown,
1489         .setsockopt     =       rose_setsockopt,
1490         .getsockopt     =       rose_getsockopt,
1491         .sendmsg        =       rose_sendmsg,
1492         .recvmsg        =       rose_recvmsg,
1493         .mmap           =       sock_no_mmap,
1494         .sendpage       =       sock_no_sendpage,
1495 };
1496
1497 static struct notifier_block rose_dev_notifier = {
1498         .notifier_call  =       rose_device_event,
1499 };
1500
1501 static struct net_device **dev_rose;
1502
1503 static struct ax25_protocol rose_pid = {
1504         .pid    = AX25_P_ROSE,
1505         .func   = rose_route_frame
1506 };
1507
1508 static struct ax25_linkfail rose_linkfail_notifier = {
1509         .func   = rose_link_failed
1510 };
1511
1512 static int __init rose_proto_init(void)
1513 {
1514         int i;
1515         int rc;
1516
1517         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1518                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1519                 rc = -EINVAL;
1520                 goto out;
1521         }
1522
1523         rc = proto_register(&rose_proto, 0);
1524         if (rc != 0)
1525                 goto out;
1526
1527         rose_callsign = null_ax25_address;
1528
1529         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1530         if (dev_rose == NULL) {
1531                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1532                 rc = -ENOMEM;
1533                 goto out_proto_unregister;
1534         }
1535
1536         for (i = 0; i < rose_ndevs; i++) {
1537                 struct net_device *dev;
1538                 char name[IFNAMSIZ];
1539
1540                 sprintf(name, "rose%d", i);
1541                 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1542                 if (!dev) {
1543                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1544                         rc = -ENOMEM;
1545                         goto fail;
1546                 }
1547                 rc = register_netdev(dev);
1548                 if (rc) {
1549                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1550                         free_netdev(dev);
1551                         goto fail;
1552                 }
1553                 rose_set_lockdep_key(dev);
1554                 dev_rose[i] = dev;
1555         }
1556
1557         sock_register(&rose_family_ops);
1558         register_netdevice_notifier(&rose_dev_notifier);
1559
1560         ax25_register_pid(&rose_pid);
1561         ax25_linkfail_register(&rose_linkfail_notifier);
1562
1563 #ifdef CONFIG_SYSCTL
1564         rose_register_sysctl();
1565 #endif
1566         rose_loopback_init();
1567
1568         rose_add_loopback_neigh();
1569
1570         proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1571         proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1572                     &rose_neigh_fops);
1573         proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1574                     &rose_nodes_fops);
1575         proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1576                     &rose_routes_fops);
1577 out:
1578         return rc;
1579 fail:
1580         while (--i >= 0) {
1581                 unregister_netdev(dev_rose[i]);
1582                 free_netdev(dev_rose[i]);
1583         }
1584         kfree(dev_rose);
1585 out_proto_unregister:
1586         proto_unregister(&rose_proto);
1587         goto out;
1588 }
1589 module_init(rose_proto_init);
1590
1591 module_param(rose_ndevs, int, 0);
1592 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1593
1594 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1595 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1596 MODULE_LICENSE("GPL");
1597 MODULE_ALIAS_NETPROTO(PF_ROSE);
1598
1599 static void __exit rose_exit(void)
1600 {
1601         int i;
1602
1603         remove_proc_entry("rose", init_net.proc_net);
1604         remove_proc_entry("rose_neigh", init_net.proc_net);
1605         remove_proc_entry("rose_nodes", init_net.proc_net);
1606         remove_proc_entry("rose_routes", init_net.proc_net);
1607         rose_loopback_clear();
1608
1609         rose_rt_free();
1610
1611         ax25_protocol_release(AX25_P_ROSE);
1612         ax25_linkfail_release(&rose_linkfail_notifier);
1613
1614         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1615                 ax25_listen_release(&rose_callsign, NULL);
1616
1617 #ifdef CONFIG_SYSCTL
1618         rose_unregister_sysctl();
1619 #endif
1620         unregister_netdevice_notifier(&rose_dev_notifier);
1621
1622         sock_unregister(PF_ROSE);
1623
1624         for (i = 0; i < rose_ndevs; i++) {
1625                 struct net_device *dev = dev_rose[i];
1626
1627                 if (dev) {
1628                         unregister_netdev(dev);
1629                         free_netdev(dev);
1630                 }
1631         }
1632
1633         kfree(dev_rose);
1634         proto_unregister(&rose_proto);
1635 }
1636
1637 module_exit(rose_exit);