git.oblomov.eu Git - linux-2.6/blob - 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/kernel.h>
  22 #include <linux/sched.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/timer.h>
  25 #include <linux/string.h>
  26 #include <linux/sockios.h>
  27 #include <linux/net.h>
  28 #include <linux/stat.h>
  29 #include <net/ax25.h>
  30 #include <linux/inet.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/if_arp.h>
  33 #include <linux/skbuff.h>
  34 #include <net/sock.h>
  35 #include <asm/system.h>
  36 #include <asm/uaccess.h>
  37 #include <linux/fcntl.h>
  38 #include <linux/termios.h>
  39 #include <linux/mm.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/notifier.h>
  42 #include <net/rose.h>
  43 #include <linux/proc_fs.h>
  44 #include <linux/seq_file.h>
  45 #include <net/tcp_states.h>
  46 #include <net/ip.h>
  47 #include <net/arp.h>
  48
  49 static int rose_ndevs = 10;
  50
  51 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  52 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  53 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  54 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  55 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  56 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  57 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  58 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  59 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  60 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  61
  62 static HLIST_HEAD(rose_list);
  63 static DEFINE_SPINLOCK(rose_list_lock);
  64
  65 static struct proto_ops rose_proto_ops;
  66
  67 ax25_address rose_callsign;
  68
  69 /*
  70  *      Convert a ROSE address into text.
  71  */
  72 const char *rose2asc(const rose_address *addr)
  73 {
  74         static char buffer[11];
  75
  76         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  77             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  78             addr->rose_addr[4] == 0x00) {
  79                 strcpy(buffer, "*");
  80         } else {
  81                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  82                                                 addr->rose_addr[1] & 0xFF,
  83                                                 addr->rose_addr[2] & 0xFF,
  84                                                 addr->rose_addr[3] & 0xFF,
  85                                                 addr->rose_addr[4] & 0xFF);
  86         }
  87
  88         return buffer;
  89 }
  90
  91 /*
  92  *      Compare two ROSE addresses, 0 == equal.
  93  */
  94 int rosecmp(rose_address *addr1, rose_address *addr2)
  95 {
  96         int i;
  97
  98         for (i = 0; i < 5; i++)
  99                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 100                         return 1;
 101
 102         return 0;
 103 }
 104
 105 /*
 106  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 107  */
 108 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 109 {
 110         int i, j;
 111
 112         if (mask > 10)
 113                 return 1;
 114
 115         for (i = 0; i < mask; i++) {
 116                 j = i / 2;
 117
 118                 if ((i % 2) != 0) {
 119                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 120                                 return 1;
 121                 } else {
 122                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 123                                 return 1;
 124                 }
 125         }
 126
 127         return 0;
 128 }
 129
 130 /*
 131  *      Socket removal during an interrupt is now safe.
 132  */
 133 static void rose_remove_socket(struct sock *sk)
 134 {
 135         spin_lock_bh(&rose_list_lock);
 136         sk_del_node_init(sk);
 137         spin_unlock_bh(&rose_list_lock);
 138 }
 139
 140 /*
 141  *      Kill all bound sockets on a broken link layer connection to a
 142  *      particular neighbour.
 143  */
 144 void rose_kill_by_neigh(struct rose_neigh *neigh)
 145 {
 146         struct sock *s;
 147         struct hlist_node *node;
 148
 149         spin_lock_bh(&rose_list_lock);
 150         sk_for_each(s, node, &rose_list) {
 151                 struct rose_sock *rose = rose_sk(s);
 152
 153                 if (rose->neighbour == neigh) {
 154                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 155                         rose->neighbour->use--;
 156                         rose->neighbour = NULL;
 157                 }
 158         }
 159         spin_unlock_bh(&rose_list_lock);
 160 }
 161
 162 /*
 163  *      Kill all bound sockets on a dropped device.
 164  */
 165 static void rose_kill_by_device(struct net_device *dev)
 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->device == dev) {
 175                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 176                         rose->neighbour->use--;
 177                         rose->device = NULL;
 178                 }
 179         }
 180         spin_unlock_bh(&rose_list_lock);
 181 }
 182
 183 /*
 184  *      Handle device status changes.
 185  */
 186 static int rose_device_event(struct notifier_block *this, unsigned long event,
 187         void *ptr)
 188 {
 189         struct net_device *dev = (struct net_device *)ptr;
 190
 191         if (event != NETDEV_DOWN)
 192                 return NOTIFY_DONE;
 193
 194         switch (dev->type) {
 195         case ARPHRD_ROSE:
 196                 rose_kill_by_device(dev);
 197                 break;
 198         case ARPHRD_AX25:
 199                 rose_link_device_down(dev);
 200                 rose_rt_device_down(dev);
 201                 break;
 202         }
 203
 204         return NOTIFY_DONE;
 205 }
 206
 207 /*
 208  *      Add a socket to the bound sockets list.
 209  */
 210 static void rose_insert_socket(struct sock *sk)
 211 {
 212
 213         spin_lock_bh(&rose_list_lock);
 214         sk_add_node(sk, &rose_list);
 215         spin_unlock_bh(&rose_list_lock);
 216 }
 217
 218 /*
 219  *      Find a socket that wants to accept the Call Request we just
 220  *      received.
 221  */
 222 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 223 {
 224         struct sock *s;
 225         struct hlist_node *node;
 226
 227         spin_lock_bh(&rose_list_lock);
 228         sk_for_each(s, node, &rose_list) {
 229                 struct rose_sock *rose = rose_sk(s);
 230
 231                 if (!rosecmp(&rose->source_addr, addr) &&
 232                     !ax25cmp(&rose->source_call, call) &&
 233                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 234                         goto found;
 235         }
 236
 237         sk_for_each(s, node, &rose_list) {
 238                 struct rose_sock *rose = rose_sk(s);
 239
 240                 if (!rosecmp(&rose->source_addr, addr) &&
 241                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 242                     s->sk_state == TCP_LISTEN)
 243                         goto found;
 244         }
 245         s = NULL;
 246 found:
 247         spin_unlock_bh(&rose_list_lock);
 248         return s;
 249 }
 250
 251 /*
 252  *      Find a connected ROSE socket given my LCI and device.
 253  */
 254 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 255 {
 256         struct sock *s;
 257         struct hlist_node *node;
 258
 259         spin_lock_bh(&rose_list_lock);
 260         sk_for_each(s, node, &rose_list) {
 261                 struct rose_sock *rose = rose_sk(s);
 262
 263                 if (rose->lci == lci && rose->neighbour == neigh)
 264                         goto found;
 265         }
 266         s = NULL;
 267 found:
 268         spin_unlock_bh(&rose_list_lock);
 269         return s;
 270 }
 271
 272 /*
 273  *      Find a unique LCI for a given device.
 274  */
 275 unsigned int rose_new_lci(struct rose_neigh *neigh)
 276 {
 277         int lci;
 278
 279         if (neigh->dce_mode) {
 280                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 281                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 282                                 return lci;
 283         } else {
 284                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 285                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 286                                 return lci;
 287         }
 288
 289         return 0;
 290 }
 291
 292 /*
 293  *      Deferred destroy.
 294  */
 295 void rose_destroy_socket(struct sock *);
 296
 297 /*
 298  *      Handler for deferred kills.
 299  */
 300 static void rose_destroy_timer(unsigned long data)
 301 {
 302         rose_destroy_socket((struct sock *)data);
 303 }
 304
 305 /*
 306  *      This is called from user mode and the timers. Thus it protects itself
 307  *      against interrupt users but doesn't worry about being called during
 308  *      work.  Once it is removed from the queue no interrupt or bottom half
 309  *      will touch it and we are (fairly 8-) ) safe.
 310  */
 311 void rose_destroy_socket(struct sock *sk)
 312 {
 313         struct sk_buff *skb;
 314
 315         rose_remove_socket(sk);
 316         rose_stop_heartbeat(sk);
 317         rose_stop_idletimer(sk);
 318         rose_stop_timer(sk);
 319
 320         rose_clear_queues(sk);          /* Flush the queues */
 321
 322         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 323                 if (skb->sk != sk) {    /* A pending connection */
 324                         /* Queue the unaccepted socket for death */
 325                         sock_set_flag(skb->sk, SOCK_DEAD);
 326                         rose_start_heartbeat(skb->sk);
 327                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 328                 }
 329
 330                 kfree_skb(skb);
 331         }
 332
 333         if (atomic_read(&sk->sk_wmem_alloc) ||
 334             atomic_read(&sk->sk_rmem_alloc)) {
 335                 /* Defer: outstanding buffers */
 336                 init_timer(&sk->sk_timer);
 337                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 338                 sk->sk_timer.function = rose_destroy_timer;
 339                 sk->sk_timer.data     = (unsigned long)sk;
 340                 add_timer(&sk->sk_timer);
 341         } else
 342                 sock_put(sk);
 343 }
 344
 345 /*
 346  *      Handling for system calls applied via the various interfaces to a
 347  *      ROSE socket object.
 348  */
 349
 350 static int rose_setsockopt(struct socket *sock, int level, int optname,
 351         char __user *optval, int optlen)
 352 {
 353         struct sock *sk = sock->sk;
 354         struct rose_sock *rose = rose_sk(sk);
 355         int opt;
 356
 357         if (level != SOL_ROSE)
 358                 return -ENOPROTOOPT;
 359
 360         if (optlen < sizeof(int))
 361                 return -EINVAL;
 362
 363         if (get_user(opt, (int __user *)optval))
 364                 return -EFAULT;
 365
 366         switch (optname) {
 367         case ROSE_DEFER:
 368                 rose->defer = opt ? 1 : 0;
 369                 return 0;
 370
 371         case ROSE_T1:
 372                 if (opt < 1)
 373                         return -EINVAL;
 374                 rose->t1 = opt * HZ;
 375                 return 0;
 376
 377         case ROSE_T2:
 378                 if (opt < 1)
 379                         return -EINVAL;
 380                 rose->t2 = opt * HZ;
 381                 return 0;
 382
 383         case ROSE_T3:
 384                 if (opt < 1)
 385                         return -EINVAL;
 386                 rose->t3 = opt * HZ;
 387                 return 0;
 388
 389         case ROSE_HOLDBACK:
 390                 if (opt < 1)
 391                         return -EINVAL;
 392                 rose->hb = opt * HZ;
 393                 return 0;
 394
 395         case ROSE_IDLE:
 396                 if (opt < 0)
 397                         return -EINVAL;
 398                 rose->idle = opt * 60 * HZ;
 399                 return 0;
 400
 401         case ROSE_QBITINCL:
 402                 rose->qbitincl = opt ? 1 : 0;
 403                 return 0;
 404
 405         default:
 406                 return -ENOPROTOOPT;
 407         }
 408 }
 409
 410 static int rose_getsockopt(struct socket *sock, int level, int optname,
 411         char __user *optval, int __user *optlen)
 412 {
 413         struct sock *sk = sock->sk;
 414         struct rose_sock *rose = rose_sk(sk);
 415         int val = 0;
 416         int len;
 417
 418         if (level != SOL_ROSE)
 419                 return -ENOPROTOOPT;
 420
 421         if (get_user(len, optlen))
 422                 return -EFAULT;
 423
 424         if (len < 0)
 425                 return -EINVAL;
 426
 427         switch (optname) {
 428         case ROSE_DEFER:
 429                 val = rose->defer;
 430                 break;
 431
 432         case ROSE_T1:
 433                 val = rose->t1 / HZ;
 434                 break;
 435
 436         case ROSE_T2:
 437                 val = rose->t2 / HZ;
 438                 break;
 439
 440         case ROSE_T3:
 441                 val = rose->t3 / HZ;
 442                 break;
 443
 444         case ROSE_HOLDBACK:
 445                 val = rose->hb / HZ;
 446                 break;
 447
 448         case ROSE_IDLE:
 449                 val = rose->idle / (60 * HZ);
 450                 break;
 451
 452         case ROSE_QBITINCL:
 453                 val = rose->qbitincl;
 454                 break;
 455
 456         default:
 457                 return -ENOPROTOOPT;
 458         }
 459
 460         len = min_t(unsigned int, len, sizeof(int));
 461
 462         if (put_user(len, optlen))
 463                 return -EFAULT;
 464
 465         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 466 }
 467
 468 static int rose_listen(struct socket *sock, int backlog)
 469 {
 470         struct sock *sk = sock->sk;
 471
 472         if (sk->sk_state != TCP_LISTEN) {
 473                 struct rose_sock *rose = rose_sk(sk);
 474
 475                 rose->dest_ndigis = 0;
 476                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 477                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 478                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 479                 sk->sk_max_ack_backlog = backlog;
 480                 sk->sk_state           = TCP_LISTEN;
 481                 return 0;
 482         }
 483
 484         return -EOPNOTSUPP;
 485 }
 486
 487 static struct proto rose_proto = {
 488         .name     = "ROSE",
 489         .owner    = THIS_MODULE,
 490         .obj_size = sizeof(struct rose_sock),
 491 };
 492
 493 static int rose_create(struct socket *sock, int protocol)
 494 {
 495         struct sock *sk;
 496         struct rose_sock *rose;
 497
 498         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 499                 return -ESOCKTNOSUPPORT;
 500
 501         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 502                 return -ENOMEM;
 503
 504         rose = rose_sk(sk);
 505
 506         sock_init_data(sock, sk);
 507
 508         skb_queue_head_init(&rose->ack_queue);
 509 #ifdef M_BIT
 510         skb_queue_head_init(&rose->frag_queue);
 511         rose->fraglen    = 0;
 512 #endif
 513
 514         sock->ops    = &rose_proto_ops;
 515         sk->sk_protocol = protocol;
 516
 517         init_timer(&rose->timer);
 518         init_timer(&rose->idletimer);
 519
 520         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 521         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 522         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 523         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 524         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 525
 526         rose->state = ROSE_STATE_0;
 527
 528         return 0;
 529 }
 530
 531 static struct sock *rose_make_new(struct sock *osk)
 532 {
 533         struct sock *sk;
 534         struct rose_sock *rose, *orose;
 535
 536         if (osk->sk_type != SOCK_SEQPACKET)
 537                 return NULL;
 538
 539         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 540                 return NULL;
 541
 542         rose = rose_sk(sk);
 543
 544         sock_init_data(NULL, sk);
 545
 546         skb_queue_head_init(&rose->ack_queue);
 547 #ifdef M_BIT
 548         skb_queue_head_init(&rose->frag_queue);
 549         rose->fraglen  = 0;
 550 #endif
 551
 552         sk->sk_type     = osk->sk_type;
 553         sk->sk_socket   = osk->sk_socket;
 554         sk->sk_priority = osk->sk_priority;
 555         sk->sk_protocol = osk->sk_protocol;
 556         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 557         sk->sk_sndbuf   = osk->sk_sndbuf;
 558         sk->sk_state    = TCP_ESTABLISHED;
 559         sk->sk_sleep    = osk->sk_sleep;
 560         sock_copy_flags(sk, osk);
 561
 562         init_timer(&rose->timer);
 563         init_timer(&rose->idletimer);
 564
 565         orose           = rose_sk(osk);
 566         rose->t1        = orose->t1;
 567         rose->t2        = orose->t2;
 568         rose->t3        = orose->t3;
 569         rose->hb        = orose->hb;
 570         rose->idle      = orose->idle;
 571         rose->defer     = orose->defer;
 572         rose->device    = orose->device;
 573         rose->qbitincl  = orose->qbitincl;
 574
 575         return sk;
 576 }
 577
 578 static int rose_release(struct socket *sock)
 579 {
 580         struct sock *sk = sock->sk;
 581         struct rose_sock *rose;
 582
 583         if (sk == NULL) return 0;
 584
 585         rose = rose_sk(sk);
 586
 587         switch (rose->state) {
 588         case ROSE_STATE_0:
 589                 rose_disconnect(sk, 0, -1, -1);
 590                 rose_destroy_socket(sk);
 591                 break;
 592
 593         case ROSE_STATE_2:
 594                 rose->neighbour->use--;
 595                 rose_disconnect(sk, 0, -1, -1);
 596                 rose_destroy_socket(sk);
 597                 break;
 598
 599         case ROSE_STATE_1:
 600         case ROSE_STATE_3:
 601         case ROSE_STATE_4:
 602         case ROSE_STATE_5:
 603                 rose_clear_queues(sk);
 604                 rose_stop_idletimer(sk);
 605                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 606                 rose_start_t3timer(sk);
 607                 rose->state  = ROSE_STATE_2;
 608                 sk->sk_state    = TCP_CLOSE;
 609                 sk->sk_shutdown |= SEND_SHUTDOWN;
 610                 sk->sk_state_change(sk);
 611                 sock_set_flag(sk, SOCK_DEAD);
 612                 sock_set_flag(sk, SOCK_DESTROY);
 613                 break;
 614
 615         default:
 616                 break;
 617         }
 618
 619         sock->sk = NULL;
 620
 621         return 0;
 622 }
 623
 624 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 625 {
 626         struct sock *sk = sock->sk;
 627         struct rose_sock *rose = rose_sk(sk);
 628         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 629         struct net_device *dev;
 630         ax25_address *source;
 631         ax25_uid_assoc *user;
 632         int n;
 633
 634         if (!sock_flag(sk, SOCK_ZAPPED))
 635                 return -EINVAL;
 636
 637         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 638                 return -EINVAL;
 639
 640         if (addr->srose_family != AF_ROSE)
 641                 return -EINVAL;
 642
 643         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 644                 return -EINVAL;
 645
 646         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 647                 return -EINVAL;
 648
 649         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 650                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 651                 return -EADDRNOTAVAIL;
 652         }
 653
 654         source = &addr->srose_call;
 655
 656         user = ax25_findbyuid(current->euid);
 657         if (user) {
 658                 rose->source_call = user->call;
 659                 ax25_uid_put(user);
 660         } else {
 661                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 662                         return -EACCES;
 663                 rose->source_call   = *source;
 664         }
 665
 666         rose->source_addr   = addr->srose_addr;
 667         rose->device        = dev;
 668         rose->source_ndigis = addr->srose_ndigis;
 669
 670         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 671                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 672                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 673                         rose->source_digis[n] = full_addr->srose_digis[n];
 674         } else {
 675                 if (rose->source_ndigis == 1) {
 676                         rose->source_digis[0] = addr->srose_digi;
 677                 }
 678         }
 679
 680         rose_insert_socket(sk);
 681
 682         sock_reset_flag(sk, SOCK_ZAPPED);
 683         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 684         return 0;
 685 }
 686
 687 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 688 {
 689         struct sock *sk = sock->sk;
 690         struct rose_sock *rose = rose_sk(sk);
 691         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 692         unsigned char cause, diagnostic;
 693         struct net_device *dev;
 694         ax25_uid_assoc *user;
 695         int n;
 696
 697         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 698                 sock->state = SS_CONNECTED;
 699                 return 0;       /* Connect completed during a ERESTARTSYS event */
 700         }
 701
 702         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 703                 sock->state = SS_UNCONNECTED;
 704                 return -ECONNREFUSED;
 705         }
 706
 707         if (sk->sk_state == TCP_ESTABLISHED)
 708                 return -EISCONN;        /* No reconnect on a seqpacket socket */
 709
 710         sk->sk_state   = TCP_CLOSE;
 711         sock->state = SS_UNCONNECTED;
 712
 713         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 714                 return -EINVAL;
 715
 716         if (addr->srose_family != AF_ROSE)
 717                 return -EINVAL;
 718
 719         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 720                 return -EINVAL;
 721
 722         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 723                 return -EINVAL;
 724
 725         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 726         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 727                 return -EINVAL;
 728
 729         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 730                                          &diagnostic);
 731         if (!rose->neighbour)
 732                 return -ENETUNREACH;
 733
 734         rose->lci = rose_new_lci(rose->neighbour);
 735         if (!rose->lci)
 736                 return -ENETUNREACH;
 737
 738         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 739                 sock_reset_flag(sk, SOCK_ZAPPED);
 740
 741                 if ((dev = rose_dev_first()) == NULL)
 742                         return -ENETUNREACH;
 743
 744                 user = ax25_findbyuid(current->euid);
 745                 if (!user)
 746                         return -EINVAL;
 747
 748                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 749                 rose->source_call = user->call;
 750                 rose->device      = dev;
 751                 ax25_uid_put(user);
 752
 753                 rose_insert_socket(sk);         /* Finish the bind */
 754         }
 755 rose_try_next_neigh:
 756         rose->dest_addr   = addr->srose_addr;
 757         rose->dest_call   = addr->srose_call;
 758         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 759         rose->dest_ndigis = addr->srose_ndigis;
 760
 761         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 762                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 763                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 764                         rose->dest_digis[n] = full_addr->srose_digis[n];
 765         } else {
 766                 if (rose->dest_ndigis == 1) {
 767                         rose->dest_digis[0] = addr->srose_digi;
 768                 }
 769         }
 770
 771         /* Move to connecting socket, start sending Connect Requests */
 772         sock->state   = SS_CONNECTING;
 773         sk->sk_state     = TCP_SYN_SENT;
 774
 775         rose->state = ROSE_STATE_1;
 776
 777         rose->neighbour->use++;
 778
 779         rose_write_internal(sk, ROSE_CALL_REQUEST);
 780         rose_start_heartbeat(sk);
 781         rose_start_t1timer(sk);
 782
 783         /* Now the loop */
 784         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
 785                 return -EINPROGRESS;
 786
 787         /*
 788          * A Connect Ack with Choke or timeout or failed routing will go to
 789          * closed.
 790          */
 791         if (sk->sk_state == TCP_SYN_SENT) {
 792                 struct task_struct *tsk = current;
 793                 DECLARE_WAITQUEUE(wait, tsk);
 794
 795                 add_wait_queue(sk->sk_sleep, &wait);
 796                 for (;;) {
 797                         set_current_state(TASK_INTERRUPTIBLE);
 798                         if (sk->sk_state != TCP_SYN_SENT)
 799                                 break;
 800                         if (!signal_pending(tsk)) {
 801                                 schedule();
 802                                 continue;
 803                         }
 804                         current->state = TASK_RUNNING;
 805                         remove_wait_queue(sk->sk_sleep, &wait);
 806                         return -ERESTARTSYS;
 807                 }
 808                 current->state = TASK_RUNNING;
 809                 remove_wait_queue(sk->sk_sleep, &wait);
 810         }
 811
 812         if (sk->sk_state != TCP_ESTABLISHED) {
 813         /* Try next neighbour */
 814                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic);
 815                 if (rose->neighbour)
 816                         goto rose_try_next_neigh;
 817         /* No more neighbour */
 818                 sock->state = SS_UNCONNECTED;
 819                 return sock_error(sk);  /* Always set at this point */
 820         }
 821
 822         sock->state = SS_CONNECTED;
 823
 824         return 0;
 825 }
 826
 827 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 828 {
 829         struct task_struct *tsk = current;
 830         DECLARE_WAITQUEUE(wait, tsk);
 831         struct sk_buff *skb;
 832         struct sock *newsk;
 833         struct sock *sk;
 834         int err = 0;
 835
 836         if ((sk = sock->sk) == NULL)
 837                 return -EINVAL;
 838
 839         lock_sock(sk);
 840         if (sk->sk_type != SOCK_SEQPACKET) {
 841                 err = -EOPNOTSUPP;
 842                 goto out;
 843         }
 844
 845         if (sk->sk_state != TCP_LISTEN) {
 846                 err = -EINVAL;
 847                 goto out;
 848         }
 849
 850         /*
 851          *      The write queue this time is holding sockets ready to use
 852          *      hooked into the SABM we saved
 853          */
 854         add_wait_queue(sk->sk_sleep, &wait);
 855         for (;;) {
 856                 skb = skb_dequeue(&sk->sk_receive_queue);
 857                 if (skb)
 858                         break;
 859
 860                 current->state = TASK_INTERRUPTIBLE;
 861                 release_sock(sk);
 862                 if (flags & O_NONBLOCK) {
 863                         current->state = TASK_RUNNING;
 864                         remove_wait_queue(sk->sk_sleep, &wait);
 865                         return -EWOULDBLOCK;
 866                 }
 867                 if (!signal_pending(tsk)) {
 868                         schedule();
 869                         lock_sock(sk);
 870                         continue;
 871                 }
 872                 return -ERESTARTSYS;
 873         }
 874         current->state = TASK_RUNNING;
 875         remove_wait_queue(sk->sk_sleep, &wait);
 876
 877         newsk = skb->sk;
 878         newsk->sk_socket = newsock;
 879         newsk->sk_sleep = &newsock->wait;
 880
 881         /* Now attach up the new socket */
 882         skb->sk = NULL;
 883         kfree_skb(skb);
 884         sk->sk_ack_backlog--;
 885         newsock->sk = newsk;
 886
 887 out:
 888         release_sock(sk);
 889
 890         return err;
 891 }
 892
 893 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 894         int *uaddr_len, int peer)
 895 {
 896         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 897         struct sock *sk = sock->sk;
 898         struct rose_sock *rose = rose_sk(sk);
 899         int n;
 900
 901         if (peer != 0) {
 902                 if (sk->sk_state != TCP_ESTABLISHED)
 903                         return -ENOTCONN;
 904                 srose->srose_family = AF_ROSE;
 905                 srose->srose_addr   = rose->dest_addr;
 906                 srose->srose_call   = rose->dest_call;
 907                 srose->srose_ndigis = rose->dest_ndigis;
 908                 for (n = 0; n < rose->dest_ndigis; n++)
 909                         srose->srose_digis[n] = rose->dest_digis[n];
 910         } else {
 911                 srose->srose_family = AF_ROSE;
 912                 srose->srose_addr   = rose->source_addr;
 913                 srose->srose_call   = rose->source_call;
 914                 srose->srose_ndigis = rose->source_ndigis;
 915                 for (n = 0; n < rose->source_ndigis; n++)
 916                         srose->srose_digis[n] = rose->source_digis[n];
 917         }
 918
 919         *uaddr_len = sizeof(struct full_sockaddr_rose);
 920         return 0;
 921 }
 922
 923 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 924 {
 925         struct sock *sk;
 926         struct sock *make;
 927         struct rose_sock *make_rose;
 928         struct rose_facilities_struct facilities;
 929         int n, len;
 930
 931         skb->sk = NULL;         /* Initially we don't know who it's for */
 932
 933         /*
 934          *      skb->data points to the rose frame start
 935          */
 936         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 937
 938         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 939         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 940         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 941                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 942                 return 0;
 943         }
 944
 945         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 946
 947         /*
 948          * We can't accept the Call Request.
 949          */
 950         if (sk == NULL || sk_acceptq_is_full(sk) ||
 951             (make = rose_make_new(sk)) == NULL) {
 952                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 953                 return 0;
 954         }
 955
 956         skb->sk     = make;
 957         make->sk_state = TCP_ESTABLISHED;
 958         make_rose = rose_sk(make);
 959
 960         make_rose->lci           = lci;
 961         make_rose->dest_addr     = facilities.dest_addr;
 962         make_rose->dest_call     = facilities.dest_call;
 963         make_rose->dest_ndigis   = facilities.dest_ndigis;
 964         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 965                 make_rose->dest_digis[n] = facilities.dest_digis[n];
 966         make_rose->source_addr   = facilities.source_addr;
 967         make_rose->source_call   = facilities.source_call;
 968         make_rose->source_ndigis = facilities.source_ndigis;
 969         for (n = 0 ; n < facilities.source_ndigis ; n++)
 970                 make_rose->source_digis[n]= facilities.source_digis[n];
 971         make_rose->neighbour     = neigh;
 972         make_rose->device        = dev;
 973         make_rose->facilities    = facilities;
 974
 975         make_rose->neighbour->use++;
 976
 977         if (rose_sk(sk)->defer) {
 978                 make_rose->state = ROSE_STATE_5;
 979         } else {
 980                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
 981                 make_rose->state = ROSE_STATE_3;
 982                 rose_start_idletimer(make);
 983         }
 984
 985         make_rose->condition = 0x00;
 986         make_rose->vs        = 0;
 987         make_rose->va        = 0;
 988         make_rose->vr        = 0;
 989         make_rose->vl        = 0;
 990         sk->sk_ack_backlog++;
 991
 992         rose_insert_socket(make);
 993
 994         skb_queue_head(&sk->sk_receive_queue, skb);
 995
 996         rose_start_heartbeat(make);
 997
 998         if (!sock_flag(sk, SOCK_DEAD))
 999                 sk->sk_data_ready(sk, skb->len);
1000
1001         return 1;
1002 }
1003
1004 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1005                         struct msghdr *msg, size_t len)
1006 {
1007         struct sock *sk = sock->sk;
1008         struct rose_sock *rose = rose_sk(sk);
1009         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1010         int err;
1011         struct full_sockaddr_rose srose;
1012         struct sk_buff *skb;
1013         unsigned char *asmptr;
1014         int n, size, qbit = 0;
1015
1016         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1017                 return -EINVAL;
1018
1019         if (sock_flag(sk, SOCK_ZAPPED))
1020                 return -EADDRNOTAVAIL;
1021
1022         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1023                 send_sig(SIGPIPE, current, 0);
1024                 return -EPIPE;
1025         }
1026
1027         if (rose->neighbour == NULL || rose->device == NULL)
1028                 return -ENETUNREACH;
1029
1030         if (usrose != NULL) {
1031                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1032                         return -EINVAL;
1033                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1034                 memcpy(&srose, usrose, msg->msg_namelen);
1035                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1036                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1037                         return -EISCONN;
1038                 if (srose.srose_ndigis != rose->dest_ndigis)
1039                         return -EISCONN;
1040                 if (srose.srose_ndigis == rose->dest_ndigis) {
1041                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1042                                 if (ax25cmp(&rose->dest_digis[n],
1043                                             &srose.srose_digis[n]))
1044                                         return -EISCONN;
1045                 }
1046                 if (srose.srose_family != AF_ROSE)
1047                         return -EINVAL;
1048         } else {
1049                 if (sk->sk_state != TCP_ESTABLISHED)
1050                         return -ENOTCONN;
1051
1052                 srose.srose_family = AF_ROSE;
1053                 srose.srose_addr   = rose->dest_addr;
1054                 srose.srose_call   = rose->dest_call;
1055                 srose.srose_ndigis = rose->dest_ndigis;
1056                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1057                         srose.srose_digis[n] = rose->dest_digis[n];
1058         }
1059
1060         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1061
1062         /* Build a packet */
1063         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1064         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1065
1066         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1067                 return err;
1068
1069         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1070
1071         /*
1072          *      Put the data on the end
1073          */
1074         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1075
1076         asmptr = skb->h.raw = skb_put(skb, len);
1077
1078         err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1079         if (err) {
1080                 kfree_skb(skb);
1081                 return err;
1082         }
1083
1084         /*
1085          *      If the Q BIT Include socket option is in force, the first
1086          *      byte of the user data is the logical value of the Q Bit.
1087          */
1088         if (rose->qbitincl) {
1089                 qbit = skb->data[0];
1090                 skb_pull(skb, 1);
1091         }
1092
1093         /*
1094          *      Push down the ROSE header
1095          */
1096         asmptr = skb_push(skb, ROSE_MIN_LEN);
1097
1098         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1099
1100         /* Build a ROSE Network header */
1101         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1102         asmptr[1] = (rose->lci >> 0) & 0xFF;
1103         asmptr[2] = ROSE_DATA;
1104
1105         if (qbit)
1106                 asmptr[0] |= ROSE_Q_BIT;
1107
1108         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1109
1110         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1111
1112         if (sk->sk_state != TCP_ESTABLISHED) {
1113                 kfree_skb(skb);
1114                 return -ENOTCONN;
1115         }
1116
1117 #ifdef M_BIT
1118 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1119         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1120                 unsigned char header[ROSE_MIN_LEN];
1121                 struct sk_buff *skbn;
1122                 int frontlen;
1123                 int lg;
1124
1125                 /* Save a copy of the Header */
1126                 memcpy(header, skb->data, ROSE_MIN_LEN);
1127                 skb_pull(skb, ROSE_MIN_LEN);
1128
1129                 frontlen = skb_headroom(skb);
1130
1131                 while (skb->len > 0) {
1132                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1133                                 kfree_skb(skb);
1134                                 return err;
1135                         }
1136
1137                         skbn->sk   = sk;
1138                         skbn->free = 1;
1139                         skbn->arp  = 1;
1140
1141                         skb_reserve(skbn, frontlen);
1142
1143                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1144
1145                         /* Copy the user data */
1146                         memcpy(skb_put(skbn, lg), skb->data, lg);
1147                         skb_pull(skb, lg);
1148
1149                         /* Duplicate the Header */
1150                         skb_push(skbn, ROSE_MIN_LEN);
1151                         memcpy(skbn->data, header, ROSE_MIN_LEN);
1152
1153                         if (skb->len > 0)
1154                                 skbn->data[2] |= M_BIT;
1155
1156                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1157                 }
1158
1159                 skb->free = 1;
1160                 kfree_skb(skb);
1161         } else {
1162                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1163         }
1164 #else
1165         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1166 #endif
1167
1168         rose_kick(sk);
1169
1170         return len;
1171 }
1172
1173
1174 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1175                         struct msghdr *msg, size_t size, int flags)
1176 {
1177         struct sock *sk = sock->sk;
1178         struct rose_sock *rose = rose_sk(sk);
1179         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1180         size_t copied;
1181         unsigned char *asmptr;
1182         struct sk_buff *skb;
1183         int n, er, qbit;
1184
1185         /*
1186          * This works for seqpacket too. The receiver has ordered the queue for
1187          * us! We do one quick check first though
1188          */
1189         if (sk->sk_state != TCP_ESTABLISHED)
1190                 return -ENOTCONN;
1191
1192         /* Now we can treat all alike */
1193         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1194                 return er;
1195
1196         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1197
1198         skb_pull(skb, ROSE_MIN_LEN);
1199
1200         if (rose->qbitincl) {
1201                 asmptr  = skb_push(skb, 1);
1202                 *asmptr = qbit;
1203         }
1204
1205         skb->h.raw = skb->data;
1206         copied     = skb->len;
1207
1208         if (copied > size) {
1209                 copied = size;
1210                 msg->msg_flags |= MSG_TRUNC;
1211         }
1212
1213         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1214
1215         if (srose != NULL) {
1216                 srose->srose_family = AF_ROSE;
1217                 srose->srose_addr   = rose->dest_addr;
1218                 srose->srose_call   = rose->dest_call;
1219                 srose->srose_ndigis = rose->dest_ndigis;
1220                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1221                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1222                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1223                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1224                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1225                 } else {
1226                         if (rose->dest_ndigis >= 1) {
1227                                 srose->srose_ndigis = 1;
1228                                 srose->srose_digi = rose->dest_digis[0];
1229                         }
1230                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1231                 }
1232         }
1233
1234         skb_free_datagram(sk, skb);
1235
1236         return copied;
1237 }
1238
1239
1240 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1241 {
1242         struct sock *sk = sock->sk;
1243         struct rose_sock *rose = rose_sk(sk);
1244         void __user *argp = (void __user *)arg;
1245
1246         switch (cmd) {
1247         case TIOCOUTQ: {
1248                 long amount;
1249                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1250                 if (amount < 0)
1251                         amount = 0;
1252                 return put_user(amount, (unsigned int __user *) argp);
1253         }
1254
1255         case TIOCINQ: {
1256                 struct sk_buff *skb;
1257                 long amount = 0L;
1258                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1259                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1260                         amount = skb->len;
1261                 return put_user(amount, (unsigned int __user *) argp);
1262         }
1263
1264         case SIOCGSTAMP:
1265                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1266
1267         case SIOCGIFADDR:
1268         case SIOCSIFADDR:
1269         case SIOCGIFDSTADDR:
1270         case SIOCSIFDSTADDR:
1271         case SIOCGIFBRDADDR:
1272         case SIOCSIFBRDADDR:
1273         case SIOCGIFNETMASK:
1274         case SIOCSIFNETMASK:
1275         case SIOCGIFMETRIC:
1276         case SIOCSIFMETRIC:
1277                 return -EINVAL;
1278
1279         case SIOCADDRT:
1280         case SIOCDELRT:
1281         case SIOCRSCLRRT:
1282                 if (!capable(CAP_NET_ADMIN))
1283                         return -EPERM;
1284                 return rose_rt_ioctl(cmd, argp);
1285
1286         case SIOCRSGCAUSE: {
1287                 struct rose_cause_struct rose_cause;
1288                 rose_cause.cause      = rose->cause;
1289                 rose_cause.diagnostic = rose->diagnostic;
1290                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1291         }
1292
1293         case SIOCRSSCAUSE: {
1294                 struct rose_cause_struct rose_cause;
1295                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1296                         return -EFAULT;
1297                 rose->cause      = rose_cause.cause;
1298                 rose->diagnostic = rose_cause.diagnostic;
1299                 return 0;
1300         }
1301
1302         case SIOCRSSL2CALL:
1303                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1304                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1305                         ax25_listen_release(&rose_callsign, NULL);
1306                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1307                         return -EFAULT;
1308                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1309                         ax25_listen_register(&rose_callsign, NULL);
1310                 return 0;
1311
1312         case SIOCRSGL2CALL:
1313                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1314
1315         case SIOCRSACCEPT:
1316                 if (rose->state == ROSE_STATE_5) {
1317                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1318                         rose_start_idletimer(sk);
1319                         rose->condition = 0x00;
1320                         rose->vs        = 0;
1321                         rose->va        = 0;
1322                         rose->vr        = 0;
1323                         rose->vl        = 0;
1324                         rose->state     = ROSE_STATE_3;
1325                 }
1326                 return 0;
1327
1328         default:
1329                 return -ENOIOCTLCMD;
1330         }
1331
1332         return 0;
1333 }
1334
1335 #ifdef CONFIG_PROC_FS
1336 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1337 {
1338         int i;
1339         struct sock *s;
1340         struct hlist_node *node;
1341
1342         spin_lock_bh(&rose_list_lock);
1343         if (*pos == 0)
1344                 return SEQ_START_TOKEN;
1345
1346         i = 1;
1347         sk_for_each(s, node, &rose_list) {
1348                 if (i == *pos)
1349                         return s;
1350                 ++i;
1351         }
1352         return NULL;
1353 }
1354
1355 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1356 {
1357         ++*pos;
1358
1359         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1360                 : sk_next((struct sock *)v);
1361 }
1362
1363 static void rose_info_stop(struct seq_file *seq, void *v)
1364 {
1365         spin_unlock_bh(&rose_list_lock);
1366 }
1367
1368 static int rose_info_show(struct seq_file *seq, void *v)
1369 {
1370         char buf[11];
1371
1372         if (v == SEQ_START_TOKEN)
1373                 seq_puts(seq,
1374                          "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");
1375
1376         else {
1377                 struct sock *s = v;
1378                 struct rose_sock *rose = rose_sk(s);
1379                 const char *devname, *callsign;
1380                 const struct net_device *dev = rose->device;
1381
1382                 if (!dev)
1383                         devname = "???";
1384                 else
1385                         devname = dev->name;
1386
1387                 seq_printf(seq, "%-10s %-9s ",
1388                         rose2asc(&rose->dest_addr),
1389                         ax2asc(buf, &rose->dest_call));
1390
1391                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1392                         callsign = "??????-?";
1393                 else
1394                         callsign = ax2asc(buf, &rose->source_call);
1395
1396                 seq_printf(seq,
1397                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1398                         rose2asc(&rose->source_addr),
1399                         callsign,
1400                         devname,
1401                         rose->lci & 0x0FFF,
1402                         (rose->neighbour) ? rose->neighbour->number : 0,
1403                         rose->state,
1404                         rose->vs,
1405                         rose->vr,
1406                         rose->va,
1407                         ax25_display_timer(&rose->timer) / HZ,
1408                         rose->t1 / HZ,
1409                         rose->t2 / HZ,
1410                         rose->t3 / HZ,
1411                         rose->hb / HZ,
1412                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1413                         rose->idle / (60 * HZ),
1414                         atomic_read(&s->sk_wmem_alloc),
1415                         atomic_read(&s->sk_rmem_alloc),
1416                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1417         }
1418
1419         return 0;
1420 }
1421
1422 static struct seq_operations rose_info_seqops = {
1423         .start = rose_info_start,
1424         .next = rose_info_next,
1425         .stop = rose_info_stop,
1426         .show = rose_info_show,
1427 };
1428
1429 static int rose_info_open(struct inode *inode, struct file *file)
1430 {
1431         return seq_open(file, &rose_info_seqops);
1432 }
1433
1434 static struct file_operations rose_info_fops = {
1435         .owner = THIS_MODULE,
1436         .open = rose_info_open,
1437         .read = seq_read,
1438         .llseek = seq_lseek,
1439         .release = seq_release,
1440 };
1441 #endif  /* CONFIG_PROC_FS */
1442
1443 static struct net_proto_family rose_family_ops = {
1444         .family         =       PF_ROSE,
1445         .create         =       rose_create,
1446         .owner          =       THIS_MODULE,
1447 };
1448
1449 static struct proto_ops rose_proto_ops = {
1450         .family         =       PF_ROSE,
1451         .owner          =       THIS_MODULE,
1452         .release        =       rose_release,
1453         .bind           =       rose_bind,
1454         .connect        =       rose_connect,
1455         .socketpair     =       sock_no_socketpair,
1456         .accept         =       rose_accept,
1457         .getname        =       rose_getname,
1458         .poll           =       datagram_poll,
1459         .ioctl          =       rose_ioctl,
1460         .listen         =       rose_listen,
1461         .shutdown       =       sock_no_shutdown,
1462         .setsockopt     =       rose_setsockopt,
1463         .getsockopt     =       rose_getsockopt,
1464         .sendmsg        =       rose_sendmsg,
1465         .recvmsg        =       rose_recvmsg,
1466         .mmap           =       sock_no_mmap,
1467         .sendpage       =       sock_no_sendpage,
1468 };
1469
1470 static struct notifier_block rose_dev_notifier = {
1471         .notifier_call  =       rose_device_event,
1472 };
1473
1474 static struct net_device **dev_rose;
1475
1476 static int __init rose_proto_init(void)
1477 {
1478         int i;
1479         int rc;
1480
1481         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1482                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1483                 rc = -EINVAL;
1484                 goto out;
1485         }
1486
1487         rc = proto_register(&rose_proto, 0);
1488         if (rc != 0)
1489                 goto out;
1490
1491         rose_callsign = null_ax25_address;
1492
1493         dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1494         if (dev_rose == NULL) {
1495                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1496                 rc = -ENOMEM;
1497                 goto out_proto_unregister;
1498         }
1499
1500         memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*));
1501         for (i = 0; i < rose_ndevs; i++) {
1502                 struct net_device *dev;
1503                 char name[IFNAMSIZ];
1504
1505                 sprintf(name, "rose%d", i);
1506                 dev = alloc_netdev(sizeof(struct net_device_stats),
1507                                    name, rose_setup);
1508                 if (!dev) {
1509                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1510                         rc = -ENOMEM;
1511                         goto fail;
1512                 }
1513                 rc = register_netdev(dev);
1514                 if (rc) {
1515                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1516                         free_netdev(dev);
1517                         goto fail;
1518                 }
1519                 dev_rose[i] = dev;
1520         }
1521
1522         sock_register(&rose_family_ops);
1523         register_netdevice_notifier(&rose_dev_notifier);
1524
1525         ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1526         ax25_linkfail_register(rose_link_failed);
1527
1528 #ifdef CONFIG_SYSCTL
1529         rose_register_sysctl();
1530 #endif
1531         rose_loopback_init();
1532
1533         rose_add_loopback_neigh();
1534
1535         proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1536         proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1537         proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1538         proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1539 out:
1540         return rc;
1541 fail:
1542         while (--i >= 0) {
1543                 unregister_netdev(dev_rose[i]);
1544                 free_netdev(dev_rose[i]);
1545         }
1546         kfree(dev_rose);
1547 out_proto_unregister:
1548         proto_unregister(&rose_proto);
1549         goto out;
1550 }
1551 module_init(rose_proto_init);
1552
1553 module_param(rose_ndevs, int, 0);
1554 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1555
1556 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1557 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1558 MODULE_LICENSE("GPL");
1559 MODULE_ALIAS_NETPROTO(PF_ROSE);
1560
1561 static void __exit rose_exit(void)
1562 {
1563         int i;
1564
1565         proc_net_remove("rose");
1566         proc_net_remove("rose_neigh");
1567         proc_net_remove("rose_nodes");
1568         proc_net_remove("rose_routes");
1569         rose_loopback_clear();
1570
1571         rose_rt_free();
1572
1573         ax25_protocol_release(AX25_P_ROSE);
1574         ax25_linkfail_release(rose_link_failed);
1575
1576         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1577                 ax25_listen_release(&rose_callsign, NULL);
1578
1579 #ifdef CONFIG_SYSCTL
1580         rose_unregister_sysctl();
1581 #endif
1582         unregister_netdevice_notifier(&rose_dev_notifier);
1583
1584         sock_unregister(PF_ROSE);
1585
1586         for (i = 0; i < rose_ndevs; i++) {
1587                 struct net_device *dev = dev_rose[i];
1588
1589                 if (dev) {
1590                         unregister_netdev(dev);
1591                         free_netdev(dev);
1592                 }
1593         }
1594
1595         kfree(dev_rose);
1596         proto_unregister(&rose_proto);
1597 }
1598
1599 module_exit(rose_exit);