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 #include <linux/config.h>
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/init.h>
  16 #include <linux/errno.h>
  17 #include <linux/types.h>
  18 #include <linux/socket.h>
  19 #include <linux/in.h>
  20 #include <linux/kernel.h>
  21 #include <linux/sched.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/timer.h>
  24 #include <linux/string.h>
  25 #include <linux/sockios.h>
  26 #include <linux/net.h>
  27 #include <linux/stat.h>
  28 #include <net/ax25.h>
  29 #include <linux/inet.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/if_arp.h>
  32 #include <linux/skbuff.h>
  33 #include <net/sock.h>
  34 #include <asm/system.h>
  35 #include <asm/uaccess.h>
  36 #include <linux/fcntl.h>
  37 #include <linux/termios.h>
  38 #include <linux/mm.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/notifier.h>
  41 #include <net/rose.h>
  42 #include <linux/proc_fs.h>
  43 #include <linux/seq_file.h>
  44 #include <net/tcp.h>
  45 #include <net/ip.h>
  46 #include <net/arp.h>
  47
  48 static int rose_ndevs = 10;
  49
  50 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  51 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  52 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  53 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  54 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  55 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  56 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  57 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  58 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  59 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  60
  61 static HLIST_HEAD(rose_list);
  62 static DEFINE_SPINLOCK(rose_list_lock);
  63
  64 static struct proto_ops rose_proto_ops;
  65
  66 ax25_address rose_callsign;
  67
  68 /*
  69  *      Convert a ROSE address into text.
  70  */
  71 const char *rose2asc(const rose_address *addr)
  72 {
  73         static char buffer[11];
  74
  75         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  76             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  77             addr->rose_addr[4] == 0x00) {
  78                 strcpy(buffer, "*");
  79         } else {
  80                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  81                                                 addr->rose_addr[1] & 0xFF,
  82                                                 addr->rose_addr[2] & 0xFF,
  83                                                 addr->rose_addr[3] & 0xFF,
  84                                                 addr->rose_addr[4] & 0xFF);
  85         }
  86
  87         return buffer;
  88 }
  89
  90 /*
  91  *      Compare two ROSE addresses, 0 == equal.
  92  */
  93 int rosecmp(rose_address *addr1, rose_address *addr2)
  94 {
  95         int i;
  96
  97         for (i = 0; i < 5; i++)
  98                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
  99                         return 1;
 100
 101         return 0;
 102 }
 103
 104 /*
 105  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 106  */
 107 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 108 {
 109         int i, j;
 110
 111         if (mask > 10)
 112                 return 1;
 113
 114         for (i = 0; i < mask; i++) {
 115                 j = i / 2;
 116
 117                 if ((i % 2) != 0) {
 118                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 119                                 return 1;
 120                 } else {
 121                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 122                                 return 1;
 123                 }
 124         }
 125
 126         return 0;
 127 }
 128
 129 /*
 130  *      Socket removal during an interrupt is now safe.
 131  */
 132 static void rose_remove_socket(struct sock *sk)
 133 {
 134         spin_lock_bh(&rose_list_lock);
 135         sk_del_node_init(sk);
 136         spin_unlock_bh(&rose_list_lock);
 137 }
 138
 139 /*
 140  *      Kill all bound sockets on a broken link layer connection to a
 141  *      particular neighbour.
 142  */
 143 void rose_kill_by_neigh(struct rose_neigh *neigh)
 144 {
 145         struct sock *s;
 146         struct hlist_node *node;
 147
 148         spin_lock_bh(&rose_list_lock);
 149         sk_for_each(s, node, &rose_list) {
 150                 struct rose_sock *rose = rose_sk(s);
 151
 152                 if (rose->neighbour == neigh) {
 153                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 154                         rose->neighbour->use--;
 155                         rose->neighbour = NULL;
 156                 }
 157         }
 158         spin_unlock_bh(&rose_list_lock);
 159 }
 160
 161 /*
 162  *      Kill all bound sockets on a dropped device.
 163  */
 164 static void rose_kill_by_device(struct net_device *dev)
 165 {
 166         struct sock *s;
 167         struct hlist_node *node;
 168
 169         spin_lock_bh(&rose_list_lock);
 170         sk_for_each(s, node, &rose_list) {
 171                 struct rose_sock *rose = rose_sk(s);
 172
 173                 if (rose->device == dev) {
 174                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 175                         rose->neighbour->use--;
 176                         rose->device = NULL;
 177                 }
 178         }
 179         spin_unlock_bh(&rose_list_lock);
 180 }
 181
 182 /*
 183  *      Handle device status changes.
 184  */
 185 static int rose_device_event(struct notifier_block *this, unsigned long event,
 186         void *ptr)
 187 {
 188         struct net_device *dev = (struct net_device *)ptr;
 189
 190         if (event != NETDEV_DOWN)
 191                 return NOTIFY_DONE;
 192
 193         switch (dev->type) {
 194         case ARPHRD_ROSE:
 195                 rose_kill_by_device(dev);
 196                 break;
 197         case ARPHRD_AX25:
 198                 rose_link_device_down(dev);
 199                 rose_rt_device_down(dev);
 200                 break;
 201         }
 202
 203         return NOTIFY_DONE;
 204 }
 205
 206 /*
 207  *      Add a socket to the bound sockets list.
 208  */
 209 static void rose_insert_socket(struct sock *sk)
 210 {
 211
 212         spin_lock_bh(&rose_list_lock);
 213         sk_add_node(sk, &rose_list);
 214         spin_unlock_bh(&rose_list_lock);
 215 }
 216
 217 /*
 218  *      Find a socket that wants to accept the Call Request we just
 219  *      received.
 220  */
 221 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 222 {
 223         struct sock *s;
 224         struct hlist_node *node;
 225
 226         spin_lock_bh(&rose_list_lock);
 227         sk_for_each(s, node, &rose_list) {
 228                 struct rose_sock *rose = rose_sk(s);
 229
 230                 if (!rosecmp(&rose->source_addr, addr) &&
 231                     !ax25cmp(&rose->source_call, call) &&
 232                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 233                         goto found;
 234         }
 235
 236         sk_for_each(s, node, &rose_list) {
 237                 struct rose_sock *rose = rose_sk(s);
 238
 239                 if (!rosecmp(&rose->source_addr, addr) &&
 240                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 241                     s->sk_state == TCP_LISTEN)
 242                         goto found;
 243         }
 244         s = NULL;
 245 found:
 246         spin_unlock_bh(&rose_list_lock);
 247         return s;
 248 }
 249
 250 /*
 251  *      Find a connected ROSE socket given my LCI and device.
 252  */
 253 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 254 {
 255         struct sock *s;
 256         struct hlist_node *node;
 257
 258         spin_lock_bh(&rose_list_lock);
 259         sk_for_each(s, node, &rose_list) {
 260                 struct rose_sock *rose = rose_sk(s);
 261
 262                 if (rose->lci == lci && rose->neighbour == neigh)
 263                         goto found;
 264         }
 265         s = NULL;
 266 found:
 267         spin_unlock_bh(&rose_list_lock);
 268         return s;
 269 }
 270
 271 /*
 272  *      Find a unique LCI for a given device.
 273  */
 274 unsigned int rose_new_lci(struct rose_neigh *neigh)
 275 {
 276         int lci;
 277
 278         if (neigh->dce_mode) {
 279                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 280                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 281                                 return lci;
 282         } else {
 283                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 284                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 285                                 return lci;
 286         }
 287
 288         return 0;
 289 }
 290
 291 /*
 292  *      Deferred destroy.
 293  */
 294 void rose_destroy_socket(struct sock *);
 295
 296 /*
 297  *      Handler for deferred kills.
 298  */
 299 static void rose_destroy_timer(unsigned long data)
 300 {
 301         rose_destroy_socket((struct sock *)data);
 302 }
 303
 304 /*
 305  *      This is called from user mode and the timers. Thus it protects itself
 306  *      against interrupt users but doesn't worry about being called during
 307  *      work.  Once it is removed from the queue no interrupt or bottom half
 308  *      will touch it and we are (fairly 8-) ) safe.
 309  */
 310 void rose_destroy_socket(struct sock *sk)
 311 {
 312         struct sk_buff *skb;
 313
 314         rose_remove_socket(sk);
 315         rose_stop_heartbeat(sk);
 316         rose_stop_idletimer(sk);
 317         rose_stop_timer(sk);
 318
 319         rose_clear_queues(sk);          /* Flush the queues */
 320
 321         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 322                 if (skb->sk != sk) {    /* A pending connection */
 323                         /* Queue the unaccepted socket for death */
 324                         sock_set_flag(skb->sk, SOCK_DEAD);
 325                         rose_start_heartbeat(skb->sk);
 326                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 327                 }
 328
 329                 kfree_skb(skb);
 330         }
 331
 332         if (atomic_read(&sk->sk_wmem_alloc) ||
 333             atomic_read(&sk->sk_rmem_alloc)) {
 334                 /* Defer: outstanding buffers */
 335                 init_timer(&sk->sk_timer);
 336                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 337                 sk->sk_timer.function = rose_destroy_timer;
 338                 sk->sk_timer.data     = (unsigned long)sk;
 339                 add_timer(&sk->sk_timer);
 340         } else
 341                 sock_put(sk);
 342 }
 343
 344 /*
 345  *      Handling for system calls applied via the various interfaces to a
 346  *      ROSE socket object.
 347  */
 348
 349 static int rose_setsockopt(struct socket *sock, int level, int optname,
 350         char __user *optval, int optlen)
 351 {
 352         struct sock *sk = sock->sk;
 353         struct rose_sock *rose = rose_sk(sk);
 354         int opt;
 355
 356         if (level != SOL_ROSE)
 357                 return -ENOPROTOOPT;
 358
 359         if (optlen < sizeof(int))
 360                 return -EINVAL;
 361
 362         if (get_user(opt, (int __user *)optval))
 363                 return -EFAULT;
 364
 365         switch (optname) {
 366         case ROSE_DEFER:
 367                 rose->defer = opt ? 1 : 0;
 368                 return 0;
 369
 370         case ROSE_T1:
 371                 if (opt < 1)
 372                         return -EINVAL;
 373                 rose->t1 = opt * HZ;
 374                 return 0;
 375
 376         case ROSE_T2:
 377                 if (opt < 1)
 378                         return -EINVAL;
 379                 rose->t2 = opt * HZ;
 380                 return 0;
 381
 382         case ROSE_T3:
 383                 if (opt < 1)
 384                         return -EINVAL;
 385                 rose->t3 = opt * HZ;
 386                 return 0;
 387
 388         case ROSE_HOLDBACK:
 389                 if (opt < 1)
 390                         return -EINVAL;
 391                 rose->hb = opt * HZ;
 392                 return 0;
 393
 394         case ROSE_IDLE:
 395                 if (opt < 0)
 396                         return -EINVAL;
 397                 rose->idle = opt * 60 * HZ;
 398                 return 0;
 399
 400         case ROSE_QBITINCL:
 401                 rose->qbitincl = opt ? 1 : 0;
 402                 return 0;
 403
 404         default:
 405                 return -ENOPROTOOPT;
 406         }
 407 }
 408
 409 static int rose_getsockopt(struct socket *sock, int level, int optname,
 410         char __user *optval, int __user *optlen)
 411 {
 412         struct sock *sk = sock->sk;
 413         struct rose_sock *rose = rose_sk(sk);
 414         int val = 0;
 415         int len;
 416
 417         if (level != SOL_ROSE)
 418                 return -ENOPROTOOPT;
 419
 420         if (get_user(len, optlen))
 421                 return -EFAULT;
 422
 423         if (len < 0)
 424                 return -EINVAL;
 425
 426         switch (optname) {
 427         case ROSE_DEFER:
 428                 val = rose->defer;
 429                 break;
 430
 431         case ROSE_T1:
 432                 val = rose->t1 / HZ;
 433                 break;
 434
 435         case ROSE_T2:
 436                 val = rose->t2 / HZ;
 437                 break;
 438
 439         case ROSE_T3:
 440                 val = rose->t3 / HZ;
 441                 break;
 442
 443         case ROSE_HOLDBACK:
 444                 val = rose->hb / HZ;
 445                 break;
 446
 447         case ROSE_IDLE:
 448                 val = rose->idle / (60 * HZ);
 449                 break;
 450
 451         case ROSE_QBITINCL:
 452                 val = rose->qbitincl;
 453                 break;
 454
 455         default:
 456                 return -ENOPROTOOPT;
 457         }
 458
 459         len = min_t(unsigned int, len, sizeof(int));
 460
 461         if (put_user(len, optlen))
 462                 return -EFAULT;
 463
 464         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 465 }
 466
 467 static int rose_listen(struct socket *sock, int backlog)
 468 {
 469         struct sock *sk = sock->sk;
 470
 471         if (sk->sk_state != TCP_LISTEN) {
 472                 struct rose_sock *rose = rose_sk(sk);
 473
 474                 rose->dest_ndigis = 0;
 475                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 476                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 477                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 478                 sk->sk_max_ack_backlog = backlog;
 479                 sk->sk_state           = TCP_LISTEN;
 480                 return 0;
 481         }
 482
 483         return -EOPNOTSUPP;
 484 }
 485
 486 static struct proto rose_proto = {
 487         .name     = "ROSE",
 488         .owner    = THIS_MODULE,
 489         .obj_size = sizeof(struct rose_sock),
 490 };
 491
 492 static int rose_create(struct socket *sock, int protocol)
 493 {
 494         struct sock *sk;
 495         struct rose_sock *rose;
 496
 497         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 498                 return -ESOCKTNOSUPPORT;
 499
 500         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 501                 return -ENOMEM;
 502
 503         rose = rose_sk(sk);
 504
 505         sock_init_data(sock, sk);
 506
 507         skb_queue_head_init(&rose->ack_queue);
 508 #ifdef M_BIT
 509         skb_queue_head_init(&rose->frag_queue);
 510         rose->fraglen    = 0;
 511 #endif
 512
 513         sock->ops    = &rose_proto_ops;
 514         sk->sk_protocol = protocol;
 515
 516         init_timer(&rose->timer);
 517         init_timer(&rose->idletimer);
 518
 519         rose->t1   = sysctl_rose_call_request_timeout;
 520         rose->t2   = sysctl_rose_reset_request_timeout;
 521         rose->t3   = sysctl_rose_clear_request_timeout;
 522         rose->hb   = sysctl_rose_ack_hold_back_timeout;
 523         rose->idle = sysctl_rose_no_activity_timeout;
 524
 525         rose->state = ROSE_STATE_0;
 526
 527         return 0;
 528 }
 529
 530 static struct sock *rose_make_new(struct sock *osk)
 531 {
 532         struct sock *sk;
 533         struct rose_sock *rose, *orose;
 534
 535         if (osk->sk_type != SOCK_SEQPACKET)
 536                 return NULL;
 537
 538         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 539                 return NULL;
 540
 541         rose = rose_sk(sk);
 542
 543         sock_init_data(NULL, sk);
 544
 545         skb_queue_head_init(&rose->ack_queue);
 546 #ifdef M_BIT
 547         skb_queue_head_init(&rose->frag_queue);
 548         rose->fraglen  = 0;
 549 #endif
 550
 551         sk->sk_type     = osk->sk_type;
 552         sk->sk_socket   = osk->sk_socket;
 553         sk->sk_priority = osk->sk_priority;
 554         sk->sk_protocol = osk->sk_protocol;
 555         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 556         sk->sk_sndbuf   = osk->sk_sndbuf;
 557         sk->sk_state    = TCP_ESTABLISHED;
 558         sk->sk_sleep    = osk->sk_sleep;
 559
 560         if (sock_flag(osk, SOCK_ZAPPED))
 561                 sock_set_flag(sk, SOCK_ZAPPED);
 562
 563         if (sock_flag(osk, SOCK_DBG))
 564                 sock_set_flag(sk, SOCK_DBG);
 565
 566         init_timer(&rose->timer);
 567         init_timer(&rose->idletimer);
 568
 569         orose           = rose_sk(osk);
 570         rose->t1        = orose->t1;
 571         rose->t2        = orose->t2;
 572         rose->t3        = orose->t3;
 573         rose->hb        = orose->hb;
 574         rose->idle      = orose->idle;
 575         rose->defer     = orose->defer;
 576         rose->device    = orose->device;
 577         rose->qbitincl  = orose->qbitincl;
 578
 579         return sk;
 580 }
 581
 582 static int rose_release(struct socket *sock)
 583 {
 584         struct sock *sk = sock->sk;
 585         struct rose_sock *rose;
 586
 587         if (sk == NULL) return 0;
 588
 589         rose = rose_sk(sk);
 590
 591         switch (rose->state) {
 592         case ROSE_STATE_0:
 593                 rose_disconnect(sk, 0, -1, -1);
 594                 rose_destroy_socket(sk);
 595                 break;
 596
 597         case ROSE_STATE_2:
 598                 rose->neighbour->use--;
 599                 rose_disconnect(sk, 0, -1, -1);
 600                 rose_destroy_socket(sk);
 601                 break;
 602
 603         case ROSE_STATE_1:
 604         case ROSE_STATE_3:
 605         case ROSE_STATE_4:
 606         case ROSE_STATE_5:
 607                 rose_clear_queues(sk);
 608                 rose_stop_idletimer(sk);
 609                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 610                 rose_start_t3timer(sk);
 611                 rose->state  = ROSE_STATE_2;
 612                 sk->sk_state    = TCP_CLOSE;
 613                 sk->sk_shutdown |= SEND_SHUTDOWN;
 614                 sk->sk_state_change(sk);
 615                 sock_set_flag(sk, SOCK_DEAD);
 616                 sock_set_flag(sk, SOCK_DESTROY);
 617                 break;
 618
 619         default:
 620                 break;
 621         }
 622
 623         sock->sk = NULL;
 624
 625         return 0;
 626 }
 627
 628 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 629 {
 630         struct sock *sk = sock->sk;
 631         struct rose_sock *rose = rose_sk(sk);
 632         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 633         struct net_device *dev;
 634         ax25_address *user, *source;
 635         int n;
 636
 637         if (!sock_flag(sk, SOCK_ZAPPED))
 638                 return -EINVAL;
 639
 640         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 641                 return -EINVAL;
 642
 643         if (addr->srose_family != AF_ROSE)
 644                 return -EINVAL;
 645
 646         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 647                 return -EINVAL;
 648
 649         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 650                 return -EINVAL;
 651
 652         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 653                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 654                 return -EADDRNOTAVAIL;
 655         }
 656
 657         source = &addr->srose_call;
 658
 659         if ((user = ax25_findbyuid(current->euid)) == NULL) {
 660                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 661                         return -EACCES;
 662                 user = source;
 663         }
 664
 665         rose->source_addr   = addr->srose_addr;
 666         rose->source_call   = *user;
 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         ax25_address *user;
 694         struct net_device *dev;
 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                 if ((user = ax25_findbyuid(current->euid)) == NULL)
 745                         return -EINVAL;
 746
 747                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 748                 rose->source_call = *user;
 749                 rose->device      = dev;
 750
 751                 rose_insert_socket(sk);         /* Finish the bind */
 752         }
 753
 754         rose->dest_addr   = addr->srose_addr;
 755         rose->dest_call   = addr->srose_call;
 756         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 757         rose->dest_ndigis = addr->srose_ndigis;
 758
 759         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 760                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 761                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 762                         rose->dest_digis[n] = full_addr->srose_digis[n];
 763         } else {
 764                 if (rose->dest_ndigis == 1) {
 765                         rose->dest_digis[0] = addr->srose_digi;
 766                 }
 767         }
 768
 769         /* Move to connecting socket, start sending Connect Requests */
 770         sock->state   = SS_CONNECTING;
 771         sk->sk_state     = TCP_SYN_SENT;
 772
 773         rose->state = ROSE_STATE_1;
 774
 775         rose->neighbour->use++;
 776
 777         rose_write_internal(sk, ROSE_CALL_REQUEST);
 778         rose_start_heartbeat(sk);
 779         rose_start_t1timer(sk);
 780
 781         /* Now the loop */
 782         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
 783                 return -EINPROGRESS;
 784
 785         /*
 786          * A Connect Ack with Choke or timeout or failed routing will go to
 787          * closed.
 788          */
 789         if (sk->sk_state == TCP_SYN_SENT) {
 790                 struct task_struct *tsk = current;
 791                 DECLARE_WAITQUEUE(wait, tsk);
 792
 793                 add_wait_queue(sk->sk_sleep, &wait);
 794                 for (;;) {
 795                         set_current_state(TASK_INTERRUPTIBLE);
 796                         if (sk->sk_state != TCP_SYN_SENT)
 797                                 break;
 798                         if (!signal_pending(tsk)) {
 799                                 schedule();
 800                                 continue;
 801                         }
 802                         current->state = TASK_RUNNING;
 803                         remove_wait_queue(sk->sk_sleep, &wait);
 804                         return -ERESTARTSYS;
 805                 }
 806                 current->state = TASK_RUNNING;
 807                 remove_wait_queue(sk->sk_sleep, &wait);
 808         }
 809
 810         if (sk->sk_state != TCP_ESTABLISHED) {
 811                 sock->state = SS_UNCONNECTED;
 812                 return sock_error(sk);  /* Always set at this point */
 813         }
 814
 815         sock->state = SS_CONNECTED;
 816
 817         return 0;
 818 }
 819
 820 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 821 {
 822         struct task_struct *tsk = current;
 823         DECLARE_WAITQUEUE(wait, tsk);
 824         struct sk_buff *skb;
 825         struct sock *newsk;
 826         struct sock *sk;
 827         int err = 0;
 828
 829         if ((sk = sock->sk) == NULL)
 830                 return -EINVAL;
 831
 832         lock_sock(sk);
 833         if (sk->sk_type != SOCK_SEQPACKET) {
 834                 err = -EOPNOTSUPP;
 835                 goto out;
 836         }
 837
 838         if (sk->sk_state != TCP_LISTEN) {
 839                 err = -EINVAL;
 840                 goto out;
 841         }
 842
 843         /*
 844          *      The write queue this time is holding sockets ready to use
 845          *      hooked into the SABM we saved
 846          */
 847         add_wait_queue(sk->sk_sleep, &wait);
 848         for (;;) {
 849                 skb = skb_dequeue(&sk->sk_receive_queue);
 850                 if (skb)
 851                         break;
 852
 853                 current->state = TASK_INTERRUPTIBLE;
 854                 release_sock(sk);
 855                 if (flags & O_NONBLOCK) {
 856                         current->state = TASK_RUNNING;
 857                         remove_wait_queue(sk->sk_sleep, &wait);
 858                         return -EWOULDBLOCK;
 859                 }
 860                 if (!signal_pending(tsk)) {
 861                         schedule();
 862                         lock_sock(sk);
 863                         continue;
 864                 }
 865                 return -ERESTARTSYS;
 866         }
 867         current->state = TASK_RUNNING;
 868         remove_wait_queue(sk->sk_sleep, &wait);
 869
 870         newsk = skb->sk;
 871         newsk->sk_socket = newsock;
 872         newsk->sk_sleep = &newsock->wait;
 873
 874         /* Now attach up the new socket */
 875         skb->sk = NULL;
 876         kfree_skb(skb);
 877         sk->sk_ack_backlog--;
 878         newsock->sk = newsk;
 879
 880 out:
 881         release_sock(sk);
 882
 883         return err;
 884 }
 885
 886 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 887         int *uaddr_len, int peer)
 888 {
 889         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 890         struct sock *sk = sock->sk;
 891         struct rose_sock *rose = rose_sk(sk);
 892         int n;
 893
 894         if (peer != 0) {
 895                 if (sk->sk_state != TCP_ESTABLISHED)
 896                         return -ENOTCONN;
 897                 srose->srose_family = AF_ROSE;
 898                 srose->srose_addr   = rose->dest_addr;
 899                 srose->srose_call   = rose->dest_call;
 900                 srose->srose_ndigis = rose->dest_ndigis;
 901                 for (n = 0; n < rose->dest_ndigis; n++)
 902                         srose->srose_digis[n] = rose->dest_digis[n];
 903         } else {
 904                 srose->srose_family = AF_ROSE;
 905                 srose->srose_addr   = rose->source_addr;
 906                 srose->srose_call   = rose->source_call;
 907                 srose->srose_ndigis = rose->source_ndigis;
 908                 for (n = 0; n < rose->source_ndigis; n++)
 909                         srose->srose_digis[n] = rose->source_digis[n];
 910         }
 911
 912         *uaddr_len = sizeof(struct full_sockaddr_rose);
 913         return 0;
 914 }
 915
 916 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 917 {
 918         struct sock *sk;
 919         struct sock *make;
 920         struct rose_sock *make_rose;
 921         struct rose_facilities_struct facilities;
 922         int n, len;
 923
 924         skb->sk = NULL;         /* Initially we don't know who it's for */
 925
 926         /*
 927          *      skb->data points to the rose frame start
 928          */
 929         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 930
 931         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 932         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 933         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 934                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 935                 return 0;
 936         }
 937
 938         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 939
 940         /*
 941          * We can't accept the Call Request.
 942          */
 943         if (sk == NULL || sk_acceptq_is_full(sk) ||
 944             (make = rose_make_new(sk)) == NULL) {
 945                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 946                 return 0;
 947         }
 948
 949         skb->sk     = make;
 950         make->sk_state = TCP_ESTABLISHED;
 951         make_rose = rose_sk(make);
 952
 953         make_rose->lci           = lci;
 954         make_rose->dest_addr     = facilities.dest_addr;
 955         make_rose->dest_call     = facilities.dest_call;
 956         make_rose->dest_ndigis   = facilities.dest_ndigis;
 957         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 958                 make_rose->dest_digis[n] = facilities.dest_digis[n];
 959         make_rose->source_addr   = facilities.source_addr;
 960         make_rose->source_call   = facilities.source_call;
 961         make_rose->source_ndigis = facilities.source_ndigis;
 962         for (n = 0 ; n < facilities.source_ndigis ; n++)
 963                 make_rose->source_digis[n]= facilities.source_digis[n];
 964         make_rose->neighbour     = neigh;
 965         make_rose->device        = dev;
 966         make_rose->facilities    = facilities;
 967
 968         make_rose->neighbour->use++;
 969
 970         if (rose_sk(sk)->defer) {
 971                 make_rose->state = ROSE_STATE_5;
 972         } else {
 973                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
 974                 make_rose->state = ROSE_STATE_3;
 975                 rose_start_idletimer(make);
 976         }
 977
 978         make_rose->condition = 0x00;
 979         make_rose->vs        = 0;
 980         make_rose->va        = 0;
 981         make_rose->vr        = 0;
 982         make_rose->vl        = 0;
 983         sk->sk_ack_backlog++;
 984
 985         rose_insert_socket(make);
 986
 987         skb_queue_head(&sk->sk_receive_queue, skb);
 988
 989         rose_start_heartbeat(make);
 990
 991         if (!sock_flag(sk, SOCK_DEAD))
 992                 sk->sk_data_ready(sk, skb->len);
 993
 994         return 1;
 995 }
 996
 997 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
 998                         struct msghdr *msg, size_t len)
 999 {
1000         struct sock *sk = sock->sk;
1001         struct rose_sock *rose = rose_sk(sk);
1002         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1003         int err;
1004         struct full_sockaddr_rose srose;
1005         struct sk_buff *skb;
1006         unsigned char *asmptr;
1007         int n, size, qbit = 0;
1008
1009         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1010                 return -EINVAL;
1011
1012         if (sock_flag(sk, SOCK_ZAPPED))
1013                 return -EADDRNOTAVAIL;
1014
1015         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1016                 send_sig(SIGPIPE, current, 0);
1017                 return -EPIPE;
1018         }
1019
1020         if (rose->neighbour == NULL || rose->device == NULL)
1021                 return -ENETUNREACH;
1022
1023         if (usrose != NULL) {
1024                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1025                         return -EINVAL;
1026                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1027                 memcpy(&srose, usrose, msg->msg_namelen);
1028                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1029                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1030                         return -EISCONN;
1031                 if (srose.srose_ndigis != rose->dest_ndigis)
1032                         return -EISCONN;
1033                 if (srose.srose_ndigis == rose->dest_ndigis) {
1034                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1035                                 if (ax25cmp(&rose->dest_digis[n],
1036                                             &srose.srose_digis[n]))
1037                                         return -EISCONN;
1038                 }
1039                 if (srose.srose_family != AF_ROSE)
1040                         return -EINVAL;
1041         } else {
1042                 if (sk->sk_state != TCP_ESTABLISHED)
1043                         return -ENOTCONN;
1044
1045                 srose.srose_family = AF_ROSE;
1046                 srose.srose_addr   = rose->dest_addr;
1047                 srose.srose_call   = rose->dest_call;
1048                 srose.srose_ndigis = rose->dest_ndigis;
1049                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1050                         srose.srose_digis[n] = rose->dest_digis[n];
1051         }
1052
1053         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1054
1055         /* Build a packet */
1056         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1057         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1058
1059         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1060                 return err;
1061
1062         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1063
1064         /*
1065          *      Put the data on the end
1066          */
1067         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1068
1069         asmptr = skb->h.raw = skb_put(skb, len);
1070
1071         err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1072         if (err) {
1073                 kfree_skb(skb);
1074                 return err;
1075         }
1076
1077         /*
1078          *      If the Q BIT Include socket option is in force, the first
1079          *      byte of the user data is the logical value of the Q Bit.
1080          */
1081         if (rose->qbitincl) {
1082                 qbit = skb->data[0];
1083                 skb_pull(skb, 1);
1084         }
1085
1086         /*
1087          *      Push down the ROSE header
1088          */
1089         asmptr = skb_push(skb, ROSE_MIN_LEN);
1090
1091         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1092
1093         /* Build a ROSE Network header */
1094         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1095         asmptr[1] = (rose->lci >> 0) & 0xFF;
1096         asmptr[2] = ROSE_DATA;
1097
1098         if (qbit)
1099                 asmptr[0] |= ROSE_Q_BIT;
1100
1101         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1102
1103         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1104
1105         if (sk->sk_state != TCP_ESTABLISHED) {
1106                 kfree_skb(skb);
1107                 return -ENOTCONN;
1108         }
1109
1110 #ifdef M_BIT
1111 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1112         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1113                 unsigned char header[ROSE_MIN_LEN];
1114                 struct sk_buff *skbn;
1115                 int frontlen;
1116                 int lg;
1117
1118                 /* Save a copy of the Header */
1119                 memcpy(header, skb->data, ROSE_MIN_LEN);
1120                 skb_pull(skb, ROSE_MIN_LEN);
1121
1122                 frontlen = skb_headroom(skb);
1123
1124                 while (skb->len > 0) {
1125                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1126                                 kfree_skb(skb);
1127                                 return err;
1128                         }
1129
1130                         skbn->sk   = sk;
1131                         skbn->free = 1;
1132                         skbn->arp  = 1;
1133
1134                         skb_reserve(skbn, frontlen);
1135
1136                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1137
1138                         /* Copy the user data */
1139                         memcpy(skb_put(skbn, lg), skb->data, lg);
1140                         skb_pull(skb, lg);
1141
1142                         /* Duplicate the Header */
1143                         skb_push(skbn, ROSE_MIN_LEN);
1144                         memcpy(skbn->data, header, ROSE_MIN_LEN);
1145
1146                         if (skb->len > 0)
1147                                 skbn->data[2] |= M_BIT;
1148
1149                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1150                 }
1151
1152                 skb->free = 1;
1153                 kfree_skb(skb);
1154         } else {
1155                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1156         }
1157 #else
1158         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1159 #endif
1160
1161         rose_kick(sk);
1162
1163         return len;
1164 }
1165
1166
1167 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1168                         struct msghdr *msg, size_t size, int flags)
1169 {
1170         struct sock *sk = sock->sk;
1171         struct rose_sock *rose = rose_sk(sk);
1172         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1173         size_t copied;
1174         unsigned char *asmptr;
1175         struct sk_buff *skb;
1176         int n, er, qbit;
1177
1178         /*
1179          * This works for seqpacket too. The receiver has ordered the queue for
1180          * us! We do one quick check first though
1181          */
1182         if (sk->sk_state != TCP_ESTABLISHED)
1183                 return -ENOTCONN;
1184
1185         /* Now we can treat all alike */
1186         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1187                 return er;
1188
1189         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1190
1191         skb_pull(skb, ROSE_MIN_LEN);
1192
1193         if (rose->qbitincl) {
1194                 asmptr  = skb_push(skb, 1);
1195                 *asmptr = qbit;
1196         }
1197
1198         skb->h.raw = skb->data;
1199         copied     = skb->len;
1200
1201         if (copied > size) {
1202                 copied = size;
1203                 msg->msg_flags |= MSG_TRUNC;
1204         }
1205
1206         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1207
1208         if (srose != NULL) {
1209                 srose->srose_family = AF_ROSE;
1210                 srose->srose_addr   = rose->dest_addr;
1211                 srose->srose_call   = rose->dest_call;
1212                 srose->srose_ndigis = rose->dest_ndigis;
1213                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1214                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1215                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1216                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1217                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1218                 } else {
1219                         if (rose->dest_ndigis >= 1) {
1220                                 srose->srose_ndigis = 1;
1221                                 srose->srose_digi = rose->dest_digis[0];
1222                         }
1223                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1224                 }
1225         }
1226
1227         skb_free_datagram(sk, skb);
1228
1229         return copied;
1230 }
1231
1232
1233 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1234 {
1235         struct sock *sk = sock->sk;
1236         struct rose_sock *rose = rose_sk(sk);
1237         void __user *argp = (void __user *)arg;
1238
1239         switch (cmd) {
1240         case TIOCOUTQ: {
1241                 long amount;
1242                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1243                 if (amount < 0)
1244                         amount = 0;
1245                 return put_user(amount, (unsigned int __user *)argp);
1246         }
1247
1248         case TIOCINQ: {
1249                 struct sk_buff *skb;
1250                 long amount = 0L;
1251                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1252                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1253                         amount = skb->len;
1254                 return put_user(amount, (unsigned int __user *)argp);
1255         }
1256
1257         case SIOCGSTAMP:
1258                 if (sk != NULL)
1259                         return sock_get_timestamp(sk, (struct timeval __user *)argp);
1260                 return -EINVAL;
1261
1262         case SIOCGIFADDR:
1263         case SIOCSIFADDR:
1264         case SIOCGIFDSTADDR:
1265         case SIOCSIFDSTADDR:
1266         case SIOCGIFBRDADDR:
1267         case SIOCSIFBRDADDR:
1268         case SIOCGIFNETMASK:
1269         case SIOCSIFNETMASK:
1270         case SIOCGIFMETRIC:
1271         case SIOCSIFMETRIC:
1272                 return -EINVAL;
1273
1274         case SIOCADDRT:
1275         case SIOCDELRT:
1276         case SIOCRSCLRRT:
1277                 if (!capable(CAP_NET_ADMIN))
1278                         return -EPERM;
1279                 return rose_rt_ioctl(cmd, argp);
1280
1281         case SIOCRSGCAUSE: {
1282                 struct rose_cause_struct rose_cause;
1283                 rose_cause.cause      = rose->cause;
1284                 rose_cause.diagnostic = rose->diagnostic;
1285                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1286         }
1287
1288         case SIOCRSSCAUSE: {
1289                 struct rose_cause_struct rose_cause;
1290                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1291                         return -EFAULT;
1292                 rose->cause      = rose_cause.cause;
1293                 rose->diagnostic = rose_cause.diagnostic;
1294                 return 0;
1295         }
1296
1297         case SIOCRSSL2CALL:
1298                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1299                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1300                         ax25_listen_release(&rose_callsign, NULL);
1301                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1302                         return -EFAULT;
1303                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1304                         ax25_listen_register(&rose_callsign, NULL);
1305                 return 0;
1306
1307         case SIOCRSGL2CALL:
1308                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1309
1310         case SIOCRSACCEPT:
1311                 if (rose->state == ROSE_STATE_5) {
1312                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1313                         rose_start_idletimer(sk);
1314                         rose->condition = 0x00;
1315                         rose->vs        = 0;
1316                         rose->va        = 0;
1317                         rose->vr        = 0;
1318                         rose->vl        = 0;
1319                         rose->state     = ROSE_STATE_3;
1320                 }
1321                 return 0;
1322
1323         default:
1324                 return dev_ioctl(cmd, argp);
1325         }
1326
1327         return 0;
1328 }
1329
1330 #ifdef CONFIG_PROC_FS
1331 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1332 {
1333         int i;
1334         struct sock *s;
1335         struct hlist_node *node;
1336
1337         spin_lock_bh(&rose_list_lock);
1338         if (*pos == 0)
1339                 return SEQ_START_TOKEN;
1340
1341         i = 1;
1342         sk_for_each(s, node, &rose_list) {
1343                 if (i == *pos)
1344                         return s;
1345                 ++i;
1346         }
1347         return NULL;
1348 }
1349
1350 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1351 {
1352         ++*pos;
1353
1354         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1355                 : sk_next((struct sock *)v);
1356 }
1357
1358 static void rose_info_stop(struct seq_file *seq, void *v)
1359 {
1360         spin_unlock_bh(&rose_list_lock);
1361 }
1362
1363 static int rose_info_show(struct seq_file *seq, void *v)
1364 {
1365         if (v == SEQ_START_TOKEN)
1366                 seq_puts(seq,
1367                          "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");
1368
1369         else {
1370                 struct sock *s = v;
1371                 struct rose_sock *rose = rose_sk(s);
1372                 const char *devname, *callsign;
1373                 const struct net_device *dev = rose->device;
1374
1375                 if (!dev)
1376                         devname = "???";
1377                 else
1378                         devname = dev->name;
1379
1380                 seq_printf(seq, "%-10s %-9s ",
1381                         rose2asc(&rose->dest_addr),
1382                         ax2asc(&rose->dest_call));
1383
1384                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1385                         callsign = "??????-?";
1386                 else
1387                         callsign = ax2asc(&rose->source_call);
1388
1389                 seq_printf(seq,
1390                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1391                         rose2asc(&rose->source_addr),
1392                         callsign,
1393                         devname,
1394                         rose->lci & 0x0FFF,
1395                         (rose->neighbour) ? rose->neighbour->number : 0,
1396                         rose->state,
1397                         rose->vs,
1398                         rose->vr,
1399                         rose->va,
1400                         ax25_display_timer(&rose->timer) / HZ,
1401                         rose->t1 / HZ,
1402                         rose->t2 / HZ,
1403                         rose->t3 / HZ,
1404                         rose->hb / HZ,
1405                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1406                         rose->idle / (60 * HZ),
1407                         atomic_read(&s->sk_wmem_alloc),
1408                         atomic_read(&s->sk_rmem_alloc),
1409                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1410         }
1411
1412         return 0;
1413 }
1414
1415 static struct seq_operations rose_info_seqops = {
1416         .start = rose_info_start,
1417         .next = rose_info_next,
1418         .stop = rose_info_stop,
1419         .show = rose_info_show,
1420 };
1421
1422 static int rose_info_open(struct inode *inode, struct file *file)
1423 {
1424         return seq_open(file, &rose_info_seqops);
1425 }
1426
1427 static struct file_operations rose_info_fops = {
1428         .owner = THIS_MODULE,
1429         .open = rose_info_open,
1430         .read = seq_read,
1431         .llseek = seq_lseek,
1432         .release = seq_release,
1433 };
1434 #endif  /* CONFIG_PROC_FS */
1435
1436 static struct net_proto_family rose_family_ops = {
1437         .family         =       PF_ROSE,
1438         .create         =       rose_create,
1439         .owner          =       THIS_MODULE,
1440 };
1441
1442 static struct proto_ops rose_proto_ops = {
1443         .family         =       PF_ROSE,
1444         .owner          =       THIS_MODULE,
1445         .release        =       rose_release,
1446         .bind           =       rose_bind,
1447         .connect        =       rose_connect,
1448         .socketpair     =       sock_no_socketpair,
1449         .accept         =       rose_accept,
1450         .getname        =       rose_getname,
1451         .poll           =       datagram_poll,
1452         .ioctl          =       rose_ioctl,
1453         .listen         =       rose_listen,
1454         .shutdown       =       sock_no_shutdown,
1455         .setsockopt     =       rose_setsockopt,
1456         .getsockopt     =       rose_getsockopt,
1457         .sendmsg        =       rose_sendmsg,
1458         .recvmsg        =       rose_recvmsg,
1459         .mmap           =       sock_no_mmap,
1460         .sendpage       =       sock_no_sendpage,
1461 };
1462
1463 static struct notifier_block rose_dev_notifier = {
1464         .notifier_call  =       rose_device_event,
1465 };
1466
1467 static struct net_device **dev_rose;
1468
1469 static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.62 for AX25.037 Linux 2.4\n";
1470
1471 static int __init rose_proto_init(void)
1472 {
1473         int i;
1474         int rc = proto_register(&rose_proto, 0);
1475
1476         if (rc != 0)
1477                 goto out;
1478
1479         rose_callsign = null_ax25_address;
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                 return -1;
1484         }
1485
1486         dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1487         if (dev_rose == NULL) {
1488                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1489                 return -1;
1490         }
1491
1492         memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*));
1493         for (i = 0; i < rose_ndevs; i++) {
1494                 struct net_device *dev;
1495                 char name[IFNAMSIZ];
1496
1497                 sprintf(name, "rose%d", i);
1498                 dev = alloc_netdev(sizeof(struct net_device_stats),
1499                                    name, rose_setup);
1500                 if (!dev) {
1501                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1502                         goto fail;
1503                 }
1504                 if (register_netdev(dev)) {
1505                         printk(KERN_ERR "ROSE: netdevice regeistration failed\n");
1506                         free_netdev(dev);
1507                         goto fail;
1508                 }
1509                 dev_rose[i] = dev;
1510         }
1511
1512         sock_register(&rose_family_ops);
1513         register_netdevice_notifier(&rose_dev_notifier);
1514         printk(banner);
1515
1516         ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1517         ax25_linkfail_register(rose_link_failed);
1518
1519 #ifdef CONFIG_SYSCTL
1520         rose_register_sysctl();
1521 #endif
1522         rose_loopback_init();
1523
1524         rose_add_loopback_neigh();
1525
1526         proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1527         proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1528         proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1529         proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1530 out:
1531         return rc;
1532 fail:
1533         while (--i >= 0) {
1534                 unregister_netdev(dev_rose[i]);
1535                 free_netdev(dev_rose[i]);
1536         }
1537         kfree(dev_rose);
1538         proto_unregister(&rose_proto);
1539         return -ENOMEM;
1540 }
1541 module_init(rose_proto_init);
1542
1543 module_param(rose_ndevs, int, 0);
1544 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1545
1546 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1547 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1548 MODULE_LICENSE("GPL");
1549 MODULE_ALIAS_NETPROTO(PF_ROSE);
1550
1551 static void __exit rose_exit(void)
1552 {
1553         int i;
1554
1555         proc_net_remove("rose");
1556         proc_net_remove("rose_neigh");
1557         proc_net_remove("rose_nodes");
1558         proc_net_remove("rose_routes");
1559         rose_loopback_clear();
1560
1561         rose_rt_free();
1562
1563         ax25_protocol_release(AX25_P_ROSE);
1564         ax25_linkfail_release(rose_link_failed);
1565
1566         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1567                 ax25_listen_release(&rose_callsign, NULL);
1568
1569 #ifdef CONFIG_SYSCTL
1570         rose_unregister_sysctl();
1571 #endif
1572         unregister_netdevice_notifier(&rose_dev_notifier);
1573
1574         sock_unregister(PF_ROSE);
1575
1576         for (i = 0; i < rose_ndevs; i++) {
1577                 struct net_device *dev = dev_rose[i];
1578
1579                 if (dev) {
1580                         unregister_netdev(dev);
1581                         free_netdev(dev);
1582                 }
1583         }
1584
1585         kfree(dev_rose);
1586         proto_unregister(&rose_proto);
1587 }
1588
1589 module_exit(rose_exit);