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/init.h>
  15 #include <linux/errno.h>
  16 #include <linux/types.h>
  17 #include <linux/socket.h>
  18 #include <linux/in.h>
  19 #include <linux/kernel.h>
  20 #include <linux/sched.h>
  21 #include <linux/spinlock.h>
  22 #include <linux/timer.h>
  23 #include <linux/string.h>
  24 #include <linux/sockios.h>
  25 #include <linux/net.h>
  26 #include <linux/stat.h>
  27 #include <net/ax25.h>
  28 #include <linux/inet.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/if_arp.h>
  31 #include <linux/skbuff.h>
  32 #include <net/sock.h>
  33 #include <asm/system.h>
  34 #include <asm/uaccess.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/termios.h>
  37 #include <linux/mm.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/notifier.h>
  40 #include <net/rose.h>
  41 #include <linux/proc_fs.h>
  42 #include <linux/seq_file.h>
  43 #include <net/tcp.h>
  44 #include <net/ip.h>
  45 #include <net/arp.h>
  46
  47 static int rose_ndevs = 10;
  48
  49 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  50 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  51 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  52 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  53 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  54 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  55 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  56 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  57 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  58 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  59
  60 HLIST_HEAD(rose_list);
  61 spinlock_t rose_list_lock = SPIN_LOCK_UNLOCKED;
  62
  63 static struct proto_ops rose_proto_ops;
  64
  65 ax25_address rose_callsign;
  66
  67 /*
  68  *      Convert a ROSE address into text.
  69  */
  70 const char *rose2asc(const rose_address *addr)
  71 {
  72         static char buffer[11];
  73
  74         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  75             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  76             addr->rose_addr[4] == 0x00) {
  77                 strcpy(buffer, "*");
  78         } else {
  79                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  80                                                 addr->rose_addr[1] & 0xFF,
  81                                                 addr->rose_addr[2] & 0xFF,
  82                                                 addr->rose_addr[3] & 0xFF,
  83                                                 addr->rose_addr[4] & 0xFF);
  84         }
  85
  86         return buffer;
  87 }
  88
  89 /*
  90  *      Compare two ROSE addresses, 0 == equal.
  91  */
  92 int rosecmp(rose_address *addr1, rose_address *addr2)
  93 {
  94         int i;
  95
  96         for (i = 0; i < 5; i++)
  97                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
  98                         return 1;
  99
 100         return 0;
 101 }
 102
 103 /*
 104  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 105  */
 106 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 107 {
 108         int i, j;
 109
 110         if (mask > 10)
 111                 return 1;
 112
 113         for (i = 0; i < mask; i++) {
 114                 j = i / 2;
 115
 116                 if ((i % 2) != 0) {
 117                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 118                                 return 1;
 119                 } else {
 120                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 121                                 return 1;
 122                 }
 123         }
 124
 125         return 0;
 126 }
 127
 128 static struct sock *rose_alloc_sock(void)
 129 {
 130         rose_cb *rose;
 131         struct sock *sk = sk_alloc(PF_ROSE, GFP_ATOMIC, 1, NULL);
 132
 133         if (!sk)
 134                 goto out;
 135
 136         rose = rose_sk(sk) = kmalloc(sizeof(*rose), GFP_ATOMIC);
 137         if (!rose)
 138                 goto frees;
 139
 140         memset(rose, 0x00, sizeof(*rose));
 141         rose->sk = sk;
 142 out:
 143         return sk;
 144 frees:
 145         sk_free(sk);
 146         sk = NULL;
 147         goto out;
 148 }
 149
 150 /*
 151  *      Socket removal during an interrupt is now safe.
 152  */
 153 static void rose_remove_socket(struct sock *sk)
 154 {
 155         spin_lock_bh(&rose_list_lock);
 156         sk_del_node_init(sk);
 157         spin_unlock_bh(&rose_list_lock);
 158 }
 159
 160 /*
 161  *      Kill all bound sockets on a broken link layer connection to a
 162  *      particular neighbour.
 163  */
 164 void rose_kill_by_neigh(struct rose_neigh *neigh)
 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                 rose_cb *rose = rose_sk(s);
 172
 173                 if (rose->neighbour == neigh) {
 174                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 175                         rose->neighbour->use--;
 176                         rose->neighbour = NULL;
 177                 }
 178         }
 179         spin_unlock_bh(&rose_list_lock);
 180 }
 181
 182 /*
 183  *      Kill all bound sockets on a dropped device.
 184  */
 185 static void rose_kill_by_device(struct net_device *dev)
 186 {
 187         struct sock *s;
 188         struct hlist_node *node;
 189
 190         spin_lock_bh(&rose_list_lock);
 191         sk_for_each(s, node, &rose_list) {
 192                 rose_cb *rose = rose_sk(s);
 193
 194                 if (rose->device == dev) {
 195                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 196                         rose->neighbour->use--;
 197                         rose->device = NULL;
 198                 }
 199         }
 200         spin_unlock_bh(&rose_list_lock);
 201 }
 202
 203 /*
 204  *      Handle device status changes.
 205  */
 206 static int rose_device_event(struct notifier_block *this, unsigned long event,
 207         void *ptr)
 208 {
 209         struct net_device *dev = (struct net_device *)ptr;
 210
 211         if (event != NETDEV_DOWN)
 212                 return NOTIFY_DONE;
 213
 214         switch (dev->type) {
 215         case ARPHRD_ROSE:
 216                 rose_kill_by_device(dev);
 217                 break;
 218         case ARPHRD_AX25:
 219                 rose_link_device_down(dev);
 220                 rose_rt_device_down(dev);
 221                 break;
 222         }
 223
 224         return NOTIFY_DONE;
 225 }
 226
 227 /*
 228  *      Add a socket to the bound sockets list.
 229  */
 230 static void rose_insert_socket(struct sock *sk)
 231 {
 232
 233         spin_lock_bh(&rose_list_lock);
 234         sk_add_node(sk, &rose_list);
 235         spin_unlock_bh(&rose_list_lock);
 236 }
 237
 238 /*
 239  *      Find a socket that wants to accept the Call Request we just
 240  *      received.
 241  */
 242 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 243 {
 244         struct sock *s;
 245         struct hlist_node *node;
 246
 247         spin_lock_bh(&rose_list_lock);
 248         sk_for_each(s, node, &rose_list) {
 249                 rose_cb *rose = rose_sk(s);
 250
 251                 if (!rosecmp(&rose->source_addr, addr) &&
 252                     !ax25cmp(&rose->source_call, call) &&
 253                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 254                         goto found;
 255         }
 256
 257         sk_for_each(s, node, &rose_list) {
 258                 rose_cb *rose = rose_sk(s);
 259
 260                 if (!rosecmp(&rose->source_addr, addr) &&
 261                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 262                     s->sk_state == TCP_LISTEN)
 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 connected ROSE socket given my LCI and device.
 273  */
 274 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 275 {
 276         struct sock *s;
 277         struct hlist_node *node;
 278
 279         spin_lock_bh(&rose_list_lock);
 280         sk_for_each(s, node, &rose_list) {
 281                 rose_cb *rose = rose_sk(s);
 282
 283                 if (rose->lci == lci && rose->neighbour == neigh)
 284                         goto found;
 285         }
 286         s = NULL;
 287 found:
 288         spin_unlock_bh(&rose_list_lock);
 289         return s;
 290 }
 291
 292 /*
 293  *      Find a unique LCI for a given device.
 294  */
 295 unsigned int rose_new_lci(struct rose_neigh *neigh)
 296 {
 297         int lci;
 298
 299         if (neigh->dce_mode) {
 300                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 301                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 302                                 return lci;
 303         } else {
 304                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 305                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 306                                 return lci;
 307         }
 308
 309         return 0;
 310 }
 311
 312 /*
 313  *      Deferred destroy.
 314  */
 315 void rose_destroy_socket(struct sock *);
 316
 317 /*
 318  *      Handler for deferred kills.
 319  */
 320 static void rose_destroy_timer(unsigned long data)
 321 {
 322         rose_destroy_socket((struct sock *)data);
 323 }
 324
 325 /*
 326  *      This is called from user mode and the timers. Thus it protects itself
 327  *      against interrupt users but doesn't worry about being called during
 328  *      work.  Once it is removed from the queue no interrupt or bottom half
 329  *      will touch it and we are (fairly 8-) ) safe.
 330  */
 331 void rose_destroy_socket(struct sock *sk)
 332 {
 333         struct sk_buff *skb;
 334
 335         rose_remove_socket(sk);
 336         rose_stop_heartbeat(sk);
 337         rose_stop_idletimer(sk);
 338         rose_stop_timer(sk);
 339
 340         rose_clear_queues(sk);          /* Flush the queues */
 341
 342         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 343                 if (skb->sk != sk) {    /* A pending connection */
 344                         /* Queue the unaccepted socket for death */
 345                         sock_set_flag(skb->sk, SOCK_DEAD);
 346                         rose_start_heartbeat(skb->sk);
 347                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 348                 }
 349
 350                 kfree_skb(skb);
 351         }
 352
 353         if (atomic_read(&sk->sk_wmem_alloc) ||
 354             atomic_read(&sk->sk_rmem_alloc)) {
 355                 /* Defer: outstanding buffers */
 356                 init_timer(&sk->sk_timer);
 357                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 358                 sk->sk_timer.function = rose_destroy_timer;
 359                 sk->sk_timer.data     = (unsigned long)sk;
 360                 add_timer(&sk->sk_timer);
 361         } else
 362                 sk_free(sk);
 363 }
 364
 365 /*
 366  *      Handling for system calls applied via the various interfaces to a
 367  *      ROSE socket object.
 368  */
 369
 370 static int rose_setsockopt(struct socket *sock, int level, int optname,
 371         char *optval, int optlen)
 372 {
 373         struct sock *sk = sock->sk;
 374         rose_cb *rose = rose_sk(sk);
 375         int opt;
 376
 377         if (level != SOL_ROSE)
 378                 return -ENOPROTOOPT;
 379
 380         if (optlen < sizeof(int))
 381                 return -EINVAL;
 382
 383         if (get_user(opt, (int *)optval))
 384                 return -EFAULT;
 385
 386         switch (optname) {
 387         case ROSE_DEFER:
 388                 rose->defer = opt ? 1 : 0;
 389                 return 0;
 390
 391         case ROSE_T1:
 392                 if (opt < 1)
 393                         return -EINVAL;
 394                 rose->t1 = opt * HZ;
 395                 return 0;
 396
 397         case ROSE_T2:
 398                 if (opt < 1)
 399                         return -EINVAL;
 400                 rose->t2 = opt * HZ;
 401                 return 0;
 402
 403         case ROSE_T3:
 404                 if (opt < 1)
 405                         return -EINVAL;
 406                 rose->t3 = opt * HZ;
 407                 return 0;
 408
 409         case ROSE_HOLDBACK:
 410                 if (opt < 1)
 411                         return -EINVAL;
 412                 rose->hb = opt * HZ;
 413                 return 0;
 414
 415         case ROSE_IDLE:
 416                 if (opt < 0)
 417                         return -EINVAL;
 418                 rose->idle = opt * 60 * HZ;
 419                 return 0;
 420
 421         case ROSE_QBITINCL:
 422                 rose->qbitincl = opt ? 1 : 0;
 423                 return 0;
 424
 425         default:
 426                 return -ENOPROTOOPT;
 427         }
 428 }
 429
 430 static int rose_getsockopt(struct socket *sock, int level, int optname,
 431         char *optval, int *optlen)
 432 {
 433         struct sock *sk = sock->sk;
 434         rose_cb *rose = rose_sk(sk);
 435         int val = 0;
 436         int len;
 437
 438         if (level != SOL_ROSE)
 439                 return -ENOPROTOOPT;
 440
 441         if (get_user(len, optlen))
 442                 return -EFAULT;
 443
 444         if (len < 0)
 445                 return -EINVAL;
 446
 447         switch (optname) {
 448         case ROSE_DEFER:
 449                 val = rose->defer;
 450                 break;
 451
 452         case ROSE_T1:
 453                 val = rose->t1 / HZ;
 454                 break;
 455
 456         case ROSE_T2:
 457                 val = rose->t2 / HZ;
 458                 break;
 459
 460         case ROSE_T3:
 461                 val = rose->t3 / HZ;
 462                 break;
 463
 464         case ROSE_HOLDBACK:
 465                 val = rose->hb / HZ;
 466                 break;
 467
 468         case ROSE_IDLE:
 469                 val = rose->idle / (60 * HZ);
 470                 break;
 471
 472         case ROSE_QBITINCL:
 473                 val = rose->qbitincl;
 474                 break;
 475
 476         default:
 477                 return -ENOPROTOOPT;
 478         }
 479
 480         len = min_t(unsigned int, len, sizeof(int));
 481
 482         if (put_user(len, optlen))
 483                 return -EFAULT;
 484
 485         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 486 }
 487
 488 static int rose_listen(struct socket *sock, int backlog)
 489 {
 490         struct sock *sk = sock->sk;
 491
 492         if (sk->sk_state != TCP_LISTEN) {
 493                 rose_cb *rose = rose_sk(sk);
 494
 495                 rose->dest_ndigis = 0;
 496                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 497                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 498                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 499                 sk->sk_max_ack_backlog = backlog;
 500                 sk->sk_state           = TCP_LISTEN;
 501                 return 0;
 502         }
 503
 504         return -EOPNOTSUPP;
 505 }
 506
 507 static int rose_create(struct socket *sock, int protocol)
 508 {
 509         struct sock *sk;
 510         rose_cb *rose;
 511
 512         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 513                 return -ESOCKTNOSUPPORT;
 514
 515         if ((sk = rose_alloc_sock()) == NULL)
 516                 return -ENOMEM;
 517
 518         rose = rose_sk(sk);
 519
 520         sock_init_data(sock, sk);
 521
 522         skb_queue_head_init(&rose->ack_queue);
 523 #ifdef M_BIT
 524         skb_queue_head_init(&rose->frag_queue);
 525         rose->fraglen    = 0;
 526 #endif
 527
 528         sock->ops    = &rose_proto_ops;
 529         sk->sk_protocol = protocol;
 530
 531         init_timer(&rose->timer);
 532         init_timer(&rose->idletimer);
 533
 534         rose->t1   = sysctl_rose_call_request_timeout;
 535         rose->t2   = sysctl_rose_reset_request_timeout;
 536         rose->t3   = sysctl_rose_clear_request_timeout;
 537         rose->hb   = sysctl_rose_ack_hold_back_timeout;
 538         rose->idle = sysctl_rose_no_activity_timeout;
 539
 540         rose->state = ROSE_STATE_0;
 541
 542         return 0;
 543 }
 544
 545 static struct sock *rose_make_new(struct sock *osk)
 546 {
 547         struct sock *sk;
 548         rose_cb *rose, *orose;
 549
 550         if (osk->sk_type != SOCK_SEQPACKET)
 551                 return NULL;
 552
 553         if ((sk = rose_alloc_sock()) == NULL)
 554                 return NULL;
 555
 556         rose = rose_sk(sk);
 557
 558         sock_init_data(NULL, sk);
 559
 560         skb_queue_head_init(&rose->ack_queue);
 561 #ifdef M_BIT
 562         skb_queue_head_init(&rose->frag_queue);
 563         rose->fraglen  = 0;
 564 #endif
 565
 566         sk->sk_type     = osk->sk_type;
 567         sk->sk_socket   = osk->sk_socket;
 568         sk->sk_priority = osk->sk_priority;
 569         sk->sk_protocol = osk->sk_protocol;
 570         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 571         sk->sk_sndbuf   = osk->sk_sndbuf;
 572         sk->sk_debug    = osk->sk_debug;
 573         sk->sk_state    = TCP_ESTABLISHED;
 574         sk->sk_sleep    = osk->sk_sleep;
 575         sk->sk_zapped   = osk->sk_zapped;
 576
 577         init_timer(&rose->timer);
 578         init_timer(&rose->idletimer);
 579
 580         orose           = rose_sk(osk);
 581         rose->t1        = orose->t1;
 582         rose->t2        = orose->t2;
 583         rose->t3        = orose->t3;
 584         rose->hb        = orose->hb;
 585         rose->idle      = orose->idle;
 586         rose->defer     = orose->defer;
 587         rose->device    = orose->device;
 588         rose->qbitincl  = orose->qbitincl;
 589
 590         return sk;
 591 }
 592
 593 static int rose_release(struct socket *sock)
 594 {
 595         struct sock *sk = sock->sk;
 596         rose_cb *rose;
 597
 598         if (sk == NULL) return 0;
 599
 600         rose = rose_sk(sk);
 601
 602         switch (rose->state) {
 603         case ROSE_STATE_0:
 604                 rose_disconnect(sk, 0, -1, -1);
 605                 rose_destroy_socket(sk);
 606                 break;
 607
 608         case ROSE_STATE_2:
 609                 rose->neighbour->use--;
 610                 rose_disconnect(sk, 0, -1, -1);
 611                 rose_destroy_socket(sk);
 612                 break;
 613
 614         case ROSE_STATE_1:
 615         case ROSE_STATE_3:
 616         case ROSE_STATE_4:
 617         case ROSE_STATE_5:
 618                 rose_clear_queues(sk);
 619                 rose_stop_idletimer(sk);
 620                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 621                 rose_start_t3timer(sk);
 622                 rose->state  = ROSE_STATE_2;
 623                 sk->sk_state    = TCP_CLOSE;
 624                 sk->sk_shutdown |= SEND_SHUTDOWN;
 625                 sk->sk_state_change(sk);
 626                 sock_set_flag(sk, SOCK_DEAD);
 627                 sock_set_flag(sk, SOCK_DESTROY);
 628                 break;
 629
 630         default:
 631                 break;
 632         }
 633
 634         sock->sk = NULL;
 635         sk->sk_socket = NULL;   /* Not used, but we should do this. **/
 636
 637         return 0;
 638 }
 639
 640 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 641 {
 642         struct sock *sk = sock->sk;
 643         rose_cb *rose = rose_sk(sk);
 644         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 645         struct net_device *dev;
 646         ax25_address *user, *source;
 647         int n;
 648
 649         if (!sk->sk_zapped)
 650                 return -EINVAL;
 651
 652         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 653                 return -EINVAL;
 654
 655         if (addr->srose_family != AF_ROSE)
 656                 return -EINVAL;
 657
 658         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 659                 return -EINVAL;
 660
 661         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 662                 return -EINVAL;
 663
 664         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 665                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 666                 return -EADDRNOTAVAIL;
 667         }
 668
 669         source = &addr->srose_call;
 670
 671         if ((user = ax25_findbyuid(current->euid)) == NULL) {
 672                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 673                         return -EACCES;
 674                 user = source;
 675         }
 676
 677         rose->source_addr   = addr->srose_addr;
 678         rose->source_call   = *user;
 679         rose->device        = dev;
 680         rose->source_ndigis = addr->srose_ndigis;
 681
 682         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 683                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 684                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 685                         rose->source_digis[n] = full_addr->srose_digis[n];
 686         } else {
 687                 if (rose->source_ndigis == 1) {
 688                         rose->source_digis[0] = addr->srose_digi;
 689                 }
 690         }
 691
 692         rose_insert_socket(sk);
 693
 694         sk->sk_zapped = 0;
 695         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 696         return 0;
 697 }
 698
 699 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 700 {
 701         struct sock *sk = sock->sk;
 702         rose_cb *rose = rose_sk(sk);
 703         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 704         unsigned char cause, diagnostic;
 705         ax25_address *user;
 706         struct net_device *dev;
 707         int n;
 708
 709         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 710                 sock->state = SS_CONNECTED;
 711                 return 0;       /* Connect completed during a ERESTARTSYS event */
 712         }
 713
 714         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 715                 sock->state = SS_UNCONNECTED;
 716                 return -ECONNREFUSED;
 717         }
 718
 719         if (sk->sk_state == TCP_ESTABLISHED)
 720                 return -EISCONN;        /* No reconnect on a seqpacket socket */
 721
 722         sk->sk_state   = TCP_CLOSE;
 723         sock->state = SS_UNCONNECTED;
 724
 725         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 726                 return -EINVAL;
 727
 728         if (addr->srose_family != AF_ROSE)
 729                 return -EINVAL;
 730
 731         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 732                 return -EINVAL;
 733
 734         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 735                 return -EINVAL;
 736
 737         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 738         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 739                 return -EINVAL;
 740
 741         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 742                                          &diagnostic);
 743         if (!rose->neighbour)
 744                 return -ENETUNREACH;
 745
 746         rose->lci = rose_new_lci(rose->neighbour);
 747         if (!rose->lci)
 748                 return -ENETUNREACH;
 749
 750         if (sk->sk_zapped) {    /* Must bind first - autobinding in this may or may not work */
 751                 sk->sk_zapped = 0;
 752
 753                 if ((dev = rose_dev_first()) == NULL)
 754                         return -ENETUNREACH;
 755
 756                 if ((user = ax25_findbyuid(current->euid)) == NULL)
 757                         return -EINVAL;
 758
 759                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 760                 rose->source_call = *user;
 761                 rose->device      = dev;
 762
 763                 rose_insert_socket(sk);         /* Finish the bind */
 764         }
 765
 766         rose->dest_addr   = addr->srose_addr;
 767         rose->dest_call   = addr->srose_call;
 768         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 769         rose->dest_ndigis = addr->srose_ndigis;
 770
 771         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 772                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 773                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 774                         rose->dest_digis[n] = full_addr->srose_digis[n];
 775         } else {
 776                 if (rose->dest_ndigis == 1) {
 777                         rose->dest_digis[0] = addr->srose_digi;
 778                 }
 779         }
 780
 781         /* Move to connecting socket, start sending Connect Requests */
 782         sock->state   = SS_CONNECTING;
 783         sk->sk_state     = TCP_SYN_SENT;
 784
 785         rose->state = ROSE_STATE_1;
 786
 787         rose->neighbour->use++;
 788
 789         rose_write_internal(sk, ROSE_CALL_REQUEST);
 790         rose_start_heartbeat(sk);
 791         rose_start_t1timer(sk);
 792
 793         /* Now the loop */
 794         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
 795                 return -EINPROGRESS;
 796
 797         /*
 798          * A Connect Ack with Choke or timeout or failed routing will go to
 799          * closed.
 800          */
 801         if (sk->sk_state == TCP_SYN_SENT) {
 802                 struct task_struct *tsk = current;
 803                 DECLARE_WAITQUEUE(wait, tsk);
 804
 805                 add_wait_queue(sk->sk_sleep, &wait);
 806                 for (;;) {
 807                         set_current_state(TASK_INTERRUPTIBLE);
 808                         if (sk->sk_state != TCP_SYN_SENT)
 809                                 break;
 810                         if (!signal_pending(tsk)) {
 811                                 schedule();
 812                                 continue;
 813                         }
 814                         return -ERESTARTSYS;
 815                 }
 816                 current->state = TASK_RUNNING;
 817                 remove_wait_queue(sk->sk_sleep, &wait);
 818         }
 819
 820         if (sk->sk_state != TCP_ESTABLISHED) {
 821                 sock->state = SS_UNCONNECTED;
 822                 return sock_error(sk);  /* Always set at this point */
 823         }
 824
 825         sock->state = SS_CONNECTED;
 826
 827         return 0;
 828 }
 829
 830 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 831 {
 832         struct task_struct *tsk = current;
 833         DECLARE_WAITQUEUE(wait, tsk);
 834         struct sk_buff *skb;
 835         struct sock *newsk;
 836         struct sock *sk;
 837         int err = 0;
 838
 839         if ((sk = sock->sk) == NULL)
 840                 return -EINVAL;
 841
 842         lock_sock(sk);
 843         if (sk->sk_type != SOCK_SEQPACKET) {
 844                 err = -EOPNOTSUPP;
 845                 goto out;
 846         }
 847
 848         if (sk->sk_state != TCP_LISTEN) {
 849                 err = -EINVAL;
 850                 goto out;
 851         }
 852
 853         /*
 854          *      The write queue this time is holding sockets ready to use
 855          *      hooked into the SABM we saved
 856          */
 857         add_wait_queue(sk->sk_sleep, &wait);
 858         for (;;) {
 859                 skb = skb_dequeue(&sk->sk_receive_queue);
 860                 if (skb)
 861                         break;
 862
 863                 current->state = TASK_INTERRUPTIBLE;
 864                 release_sock(sk);
 865                 if (flags & O_NONBLOCK)
 866                         return -EWOULDBLOCK;
 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_pair = NULL;
 879         newsk->sk_socket = newsock;
 880         newsk->sk_sleep = &newsock->wait;
 881
 882         /* Now attach up the new socket */
 883         skb->sk = NULL;
 884         kfree_skb(skb);
 885         sk->sk_ack_backlog--;
 886         newsock->sk = newsk;
 887
 888 out:
 889         release_sock(sk);
 890
 891         return err;
 892 }
 893
 894 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 895         int *uaddr_len, int peer)
 896 {
 897         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 898         struct sock *sk = sock->sk;
 899         rose_cb *rose = rose_sk(sk);
 900         int n;
 901
 902         if (peer != 0) {
 903                 if (sk->sk_state != TCP_ESTABLISHED)
 904                         return -ENOTCONN;
 905                 srose->srose_family = AF_ROSE;
 906                 srose->srose_addr   = rose->dest_addr;
 907                 srose->srose_call   = rose->dest_call;
 908                 srose->srose_ndigis = rose->dest_ndigis;
 909                 for (n = 0; n < rose->dest_ndigis; n++)
 910                         srose->srose_digis[n] = rose->dest_digis[n];
 911         } else {
 912                 srose->srose_family = AF_ROSE;
 913                 srose->srose_addr   = rose->source_addr;
 914                 srose->srose_call   = rose->source_call;
 915                 srose->srose_ndigis = rose->source_ndigis;
 916                 for (n = 0; n < rose->source_ndigis; n++)
 917                         srose->srose_digis[n] = rose->source_digis[n];
 918         }
 919
 920         *uaddr_len = sizeof(struct full_sockaddr_rose);
 921         return 0;
 922 }
 923
 924 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 925 {
 926         struct sock *sk;
 927         struct sock *make;
 928         rose_cb *make_rose;
 929         struct rose_facilities_struct facilities;
 930         int n, len;
 931
 932         skb->sk = NULL;         /* Initially we don't know who it's for */
 933
 934         /*
 935          *      skb->data points to the rose frame start
 936          */
 937         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 938
 939         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 940         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 941         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 942                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 943                 return 0;
 944         }
 945
 946         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 947
 948         /*
 949          * We can't accept the Call Request.
 950          */
 951         if (!sk || sk->sk_ack_backlog == sk->sk_max_ack_backlog ||
 952             (make = rose_make_new(sk)) == NULL) {
 953                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 954                 return 0;
 955         }
 956
 957         skb->sk     = make;
 958         make->sk_state = TCP_ESTABLISHED;
 959         make_rose = rose_sk(make);
 960
 961         make_rose->lci           = lci;
 962         make_rose->dest_addr     = facilities.dest_addr;
 963         make_rose->dest_call     = facilities.dest_call;
 964         make_rose->dest_ndigis   = facilities.dest_ndigis;
 965         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 966                 make_rose->dest_digis[n] = facilities.dest_digis[n];
 967         make_rose->source_addr   = facilities.source_addr;
 968         make_rose->source_call   = facilities.source_call;
 969         make_rose->source_ndigis = facilities.source_ndigis;
 970         for (n = 0 ; n < facilities.source_ndigis ; n++)
 971                 make_rose->source_digis[n]= facilities.source_digis[n];
 972         make_rose->neighbour     = neigh;
 973         make_rose->device        = dev;
 974         make_rose->facilities    = facilities;
 975
 976         make_rose->neighbour->use++;
 977
 978         if (rose_sk(sk)->defer) {
 979                 make_rose->state = ROSE_STATE_5;
 980         } else {
 981                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
 982                 make_rose->state = ROSE_STATE_3;
 983                 rose_start_idletimer(make);
 984         }
 985
 986         make_rose->condition = 0x00;
 987         make_rose->vs        = 0;
 988         make_rose->va        = 0;
 989         make_rose->vr        = 0;
 990         make_rose->vl        = 0;
 991         sk->sk_ack_backlog++;
 992         make->sk_pair = sk;
 993
 994         rose_insert_socket(make);
 995
 996         skb_queue_head(&sk->sk_receive_queue, skb);
 997
 998         rose_start_heartbeat(make);
 999
1000         if (!sock_flag(sk, SOCK_DEAD))
1001                 sk->sk_data_ready(sk, skb->len);
1002
1003         return 1;
1004 }
1005
1006 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1007                         struct msghdr *msg, int len)
1008 {
1009         struct sock *sk = sock->sk;
1010         rose_cb *rose = rose_sk(sk);
1011         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1012         int err;
1013         struct full_sockaddr_rose srose;
1014         struct sk_buff *skb;
1015         unsigned char *asmptr;
1016         int n, size, qbit = 0;
1017
1018         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR))
1019                 return -EINVAL;
1020
1021         if (sk->sk_zapped)
1022                 return -EADDRNOTAVAIL;
1023
1024         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1025                 send_sig(SIGPIPE, current, 0);
1026                 return -EPIPE;
1027         }
1028
1029         if (rose->neighbour == NULL || rose->device == NULL)
1030                 return -ENETUNREACH;
1031
1032         if (usrose != NULL) {
1033                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1034                         return -EINVAL;
1035                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1036                 memcpy(&srose, usrose, msg->msg_namelen);
1037                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1038                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1039                         return -EISCONN;
1040                 if (srose.srose_ndigis != rose->dest_ndigis)
1041                         return -EISCONN;
1042                 if (srose.srose_ndigis == rose->dest_ndigis) {
1043                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1044                                 if (ax25cmp(&rose->dest_digis[n],
1045                                             &srose.srose_digis[n]))
1046                                         return -EISCONN;
1047                 }
1048                 if (srose.srose_family != AF_ROSE)
1049                         return -EINVAL;
1050         } else {
1051                 if (sk->sk_state != TCP_ESTABLISHED)
1052                         return -ENOTCONN;
1053
1054                 srose.srose_family = AF_ROSE;
1055                 srose.srose_addr   = rose->dest_addr;
1056                 srose.srose_call   = rose->dest_call;
1057                 srose.srose_ndigis = rose->dest_ndigis;
1058                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1059                         srose.srose_digis[n] = rose->dest_digis[n];
1060         }
1061
1062         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1063
1064         /* Build a packet */
1065         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1066         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1067
1068         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1069                 return err;
1070
1071         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1072
1073         /*
1074          *      Put the data on the end
1075          */
1076         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1077
1078         asmptr = skb->h.raw = skb_put(skb, len);
1079
1080         memcpy_fromiovec(asmptr, msg->msg_iov, len);
1081
1082         /*
1083          *      If the Q BIT Include socket option is in force, the first
1084          *      byte of the user data is the logical value of the Q Bit.
1085          */
1086         if (rose->qbitincl) {
1087                 qbit = skb->data[0];
1088                 skb_pull(skb, 1);
1089         }
1090
1091         /*
1092          *      Push down the ROSE header
1093          */
1094         asmptr = skb_push(skb, ROSE_MIN_LEN);
1095
1096         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1097
1098         /* Build a ROSE Network header */
1099         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1100         asmptr[1] = (rose->lci >> 0) & 0xFF;
1101         asmptr[2] = ROSE_DATA;
1102
1103         if (qbit)
1104                 asmptr[0] |= ROSE_Q_BIT;
1105
1106         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1107
1108         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1109
1110         if (sk->sk_state != TCP_ESTABLISHED) {
1111                 kfree_skb(skb);
1112                 return -ENOTCONN;
1113         }
1114
1115 #ifdef M_BIT
1116 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1117         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1118                 unsigned char header[ROSE_MIN_LEN];
1119                 struct sk_buff *skbn;
1120                 int frontlen;
1121                 int lg;
1122
1123                 /* Save a copy of the Header */
1124                 memcpy(header, skb->data, ROSE_MIN_LEN);
1125                 skb_pull(skb, ROSE_MIN_LEN);
1126
1127                 frontlen = skb_headroom(skb);
1128
1129                 while (skb->len > 0) {
1130                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL)
1131                                 return err;
1132
1133                         skbn->sk   = sk;
1134                         skbn->free = 1;
1135                         skbn->arp  = 1;
1136
1137                         skb_reserve(skbn, frontlen);
1138
1139                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1140
1141                         /* Copy the user data */
1142                         memcpy(skb_put(skbn, lg), skb->data, lg);
1143                         skb_pull(skb, lg);
1144
1145                         /* Duplicate the Header */
1146                         skb_push(skbn, ROSE_MIN_LEN);
1147                         memcpy(skbn->data, header, ROSE_MIN_LEN);
1148
1149                         if (skb->len > 0)
1150                                 skbn->data[2] |= M_BIT;
1151
1152                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1153                 }
1154
1155                 skb->free = 1;
1156                 kfree_skb(skb, FREE_WRITE);
1157         } else {
1158                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1159         }
1160 #else
1161         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1162 #endif
1163
1164         rose_kick(sk);
1165
1166         return len;
1167 }
1168
1169
1170 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1171                         struct msghdr *msg, int size, int flags)
1172 {
1173         struct sock *sk = sock->sk;
1174         rose_cb *rose = rose_sk(sk);
1175         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1176         int copied, qbit;
1177         unsigned char *asmptr;
1178         struct sk_buff *skb;
1179         int n, er;
1180
1181         /*
1182          * This works for seqpacket too. The receiver has ordered the queue for
1183          * us! We do one quick check first though
1184          */
1185         if (sk->sk_state != TCP_ESTABLISHED)
1186                 return -ENOTCONN;
1187
1188         /* Now we can treat all alike */
1189         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1190                 return er;
1191
1192         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1193
1194         skb_pull(skb, ROSE_MIN_LEN);
1195
1196         if (rose->qbitincl) {
1197                 asmptr  = skb_push(skb, 1);
1198                 *asmptr = qbit;
1199         }
1200
1201         skb->h.raw = skb->data;
1202         copied     = skb->len;
1203
1204         if (copied > size) {
1205                 copied = size;
1206                 msg->msg_flags |= MSG_TRUNC;
1207         }
1208
1209         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1210
1211         if (srose != NULL) {
1212                 srose->srose_family = AF_ROSE;
1213                 srose->srose_addr   = rose->dest_addr;
1214                 srose->srose_call   = rose->dest_call;
1215                 srose->srose_ndigis = rose->dest_ndigis;
1216                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1217                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1218                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1219                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1220                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1221                 } else {
1222                         if (rose->dest_ndigis >= 1) {
1223                                 srose->srose_ndigis = 1;
1224                                 srose->srose_digi = rose->dest_digis[0];
1225                         }
1226                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1227                 }
1228         }
1229
1230         skb_free_datagram(sk, skb);
1231
1232         return copied;
1233 }
1234
1235
1236 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1237 {
1238         struct sock *sk = sock->sk;
1239         rose_cb *rose = rose_sk(sk);
1240
1241         switch (cmd) {
1242         case TIOCOUTQ: {
1243                 long amount;
1244                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1245                 if (amount < 0)
1246                         amount = 0;
1247                 return put_user(amount, (unsigned int *)arg);
1248         }
1249
1250         case TIOCINQ: {
1251                 struct sk_buff *skb;
1252                 long amount = 0L;
1253                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1254                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1255                         amount = skb->len;
1256                 return put_user(amount, (unsigned int *)arg);
1257         }
1258
1259         case SIOCGSTAMP:
1260                 if (sk != NULL) {
1261                         if (!sk->sk_stamp.tv_sec)
1262                                 return -ENOENT;
1263                         return copy_to_user((void *)arg, &sk->sk_stamp,
1264                                           sizeof(struct timeval)) ? -EFAULT : 0;
1265                 }
1266                 return -EINVAL;
1267
1268         case SIOCGIFADDR:
1269         case SIOCSIFADDR:
1270         case SIOCGIFDSTADDR:
1271         case SIOCSIFDSTADDR:
1272         case SIOCGIFBRDADDR:
1273         case SIOCSIFBRDADDR:
1274         case SIOCGIFNETMASK:
1275         case SIOCSIFNETMASK:
1276         case SIOCGIFMETRIC:
1277         case SIOCSIFMETRIC:
1278                 return -EINVAL;
1279
1280         case SIOCADDRT:
1281         case SIOCDELRT:
1282         case SIOCRSCLRRT:
1283                 if (!capable(CAP_NET_ADMIN))
1284                         return -EPERM;
1285                 return rose_rt_ioctl(cmd, (void *)arg);
1286
1287         case SIOCRSGCAUSE: {
1288                 struct rose_cause_struct rose_cause;
1289                 rose_cause.cause      = rose->cause;
1290                 rose_cause.diagnostic = rose->diagnostic;
1291                 return copy_to_user((void *)arg, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1292         }
1293
1294         case SIOCRSSCAUSE: {
1295                 struct rose_cause_struct rose_cause;
1296                 if (copy_from_user(&rose_cause, (void *)arg, sizeof(struct rose_cause_struct)))
1297                         return -EFAULT;
1298                 rose->cause      = rose_cause.cause;
1299                 rose->diagnostic = rose_cause.diagnostic;
1300                 return 0;
1301         }
1302
1303         case SIOCRSSL2CALL:
1304                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1305                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1306                         ax25_listen_release(&rose_callsign, NULL);
1307                 if (copy_from_user(&rose_callsign, (void *)arg, sizeof(ax25_address)))
1308                         return -EFAULT;
1309                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1310                         ax25_listen_register(&rose_callsign, NULL);
1311                 return 0;
1312
1313         case SIOCRSGL2CALL:
1314                 return copy_to_user((void *)arg, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1315
1316         case SIOCRSACCEPT:
1317                 if (rose->state == ROSE_STATE_5) {
1318                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1319                         rose_start_idletimer(sk);
1320                         rose->condition = 0x00;
1321                         rose->vs        = 0;
1322                         rose->va        = 0;
1323                         rose->vr        = 0;
1324                         rose->vl        = 0;
1325                         rose->state     = ROSE_STATE_3;
1326                 }
1327                 return 0;
1328
1329         default:
1330                 return dev_ioctl(cmd, (void *)arg);
1331         }
1332
1333         return 0;
1334 }
1335
1336 #ifdef CONFIG_PROC_FS
1337 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1338 {
1339         int i;
1340         struct sock *s;
1341         struct hlist_node *node;
1342
1343         spin_lock_bh(&rose_list_lock);
1344         if (*pos == 0)
1345                 return ROSE_PROC_START;
1346
1347         i = 1;
1348         sk_for_each(s, node, &rose_list) {
1349                 if (i == *pos)
1350                         return s;
1351                 ++i;
1352         }
1353         return NULL;
1354 }
1355
1356 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1357 {
1358         ++*pos;
1359
1360         return (v == ROSE_PROC_START) ? sk_head(&rose_list)
1361                 : sk_next((struct sock *)v);
1362 }
1363
1364 static void rose_info_stop(struct seq_file *seq, void *v)
1365 {
1366         spin_unlock_bh(&rose_list_lock);
1367 }
1368
1369 static int rose_info_show(struct seq_file *seq, void *v)
1370 {
1371         if (v == ROSE_PROC_START)
1372                 seq_puts(seq,
1373                          "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");
1374
1375         else {
1376                 struct sock *s = v;
1377                 rose_cb *rose = rose_sk(s);
1378                 const char *devname, *callsign;
1379                 const struct net_device *dev = rose->device;
1380
1381                 if (!dev)
1382                         devname = "???";
1383                 else
1384                         devname = dev->name;
1385
1386                 seq_printf(seq, "%-10s %-9s ",
1387                         rose2asc(&rose->dest_addr),
1388                         ax2asc(&rose->dest_call));
1389
1390                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1391                         callsign = "??????-?";
1392                 else
1393                         callsign = ax2asc(&rose->source_call);
1394
1395                 seq_printf(seq,
1396                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1397                         rose2asc(&rose->source_addr),
1398                         callsign,
1399                         devname,
1400                         rose->lci & 0x0FFF,
1401                         (rose->neighbour) ? rose->neighbour->number : 0,
1402                         rose->state,
1403                         rose->vs,
1404                         rose->vr,
1405                         rose->va,
1406                         ax25_display_timer(&rose->timer) / HZ,
1407                         rose->t1 / HZ,
1408                         rose->t2 / HZ,
1409                         rose->t3 / HZ,
1410                         rose->hb / HZ,
1411                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1412                         rose->idle / (60 * HZ),
1413                         atomic_read(&s->sk_wmem_alloc),
1414                         atomic_read(&s->sk_rmem_alloc),
1415                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1416         }
1417
1418         return 0;
1419 }
1420
1421 static struct seq_operations rose_info_seqops = {
1422         .start = rose_info_start,
1423         .next = rose_info_next,
1424         .stop = rose_info_stop,
1425         .show = rose_info_show,
1426 };
1427
1428 static int rose_info_open(struct inode *inode, struct file *file)
1429 {
1430         return seq_open(file, &rose_info_seqops);
1431 }
1432
1433 static struct file_operations rose_info_fops = {
1434         .owner = THIS_MODULE,
1435         .open = rose_info_open,
1436         .read = seq_read,
1437         .llseek = seq_lseek,
1438         .release = seq_release,
1439 };
1440 #endif  /* CONFIG_PROC_FS */
1441
1442 static struct net_proto_family rose_family_ops = {
1443         .family         =       PF_ROSE,
1444         .create         =       rose_create,
1445         .owner          =       THIS_MODULE,
1446 };
1447
1448 static struct proto_ops rose_proto_ops = {
1449         .family         =       PF_ROSE,
1450         .owner          =       THIS_MODULE,
1451         .release        =       rose_release,
1452         .bind           =       rose_bind,
1453         .connect        =       rose_connect,
1454         .socketpair     =       sock_no_socketpair,
1455         .accept         =       rose_accept,
1456         .getname        =       rose_getname,
1457         .poll           =       datagram_poll,
1458         .ioctl          =       rose_ioctl,
1459         .listen         =       rose_listen,
1460         .shutdown       =       sock_no_shutdown,
1461         .setsockopt     =       rose_setsockopt,
1462         .getsockopt     =       rose_getsockopt,
1463         .sendmsg        =       rose_sendmsg,
1464         .recvmsg        =       rose_recvmsg,
1465         .mmap           =       sock_no_mmap,
1466         .sendpage       =       sock_no_sendpage,
1467 };
1468
1469 static struct notifier_block rose_dev_notifier = {
1470         .notifier_call  =       rose_device_event,
1471 };
1472
1473 static struct net_device **dev_rose;
1474
1475 static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.62 for AX25.037 Linux 2.4\n";
1476
1477 static int __init rose_proto_init(void)
1478 {
1479         int i;
1480
1481         rose_callsign = null_ax25_address;
1482
1483         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device)) {
1484                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1485                 return -1;
1486         }
1487
1488         dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1489         if (dev_rose == NULL) {
1490                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1491                 return -1;
1492         }
1493
1494         memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*));
1495         for (i = 0; i < rose_ndevs; i++) {
1496                 struct net_device *dev;
1497                 char name[IFNAMSIZ];
1498
1499                 sprintf(name, "rose%d", i);
1500                 dev = alloc_netdev(sizeof(struct net_device_stats),
1501                                    name, rose_setup);
1502                 if (!dev) {
1503                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1504                         while (--i >= 0)
1505                                 kfree(dev_rose[i]);
1506                         return -ENOMEM;
1507                 }
1508                 dev_rose[i] = dev;
1509         }
1510
1511         for (i = 0; i < rose_ndevs; i++) {
1512                 if (register_netdev(dev_rose[i])) {
1513                         printk(KERN_ERR "ROSE: netdevice regeistration failed\n");
1514                         while (--i >= 0) {
1515                                 unregister_netdev(dev_rose[i]);
1516                                 kfree(dev_rose[i]);
1517                                 return -EIO;
1518                         }
1519                 }
1520
1521         }
1522
1523         sock_register(&rose_family_ops);
1524         register_netdevice_notifier(&rose_dev_notifier);
1525         printk(banner);
1526
1527         ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1528         ax25_linkfail_register(rose_link_failed);
1529
1530 #ifdef CONFIG_SYSCTL
1531         rose_register_sysctl();
1532 #endif
1533         rose_loopback_init();
1534
1535         rose_add_loopback_neigh();
1536
1537         proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1538         proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1539         proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1540         proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1541
1542         return 0;
1543 }
1544 module_init(rose_proto_init);
1545
1546 MODULE_PARM(rose_ndevs, "i");
1547 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1548
1549 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1550 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1551 MODULE_LICENSE("GPL");
1552
1553 static void __exit rose_exit(void)
1554 {
1555         int i;
1556
1557         proc_net_remove("rose");
1558         proc_net_remove("rose_neigh");
1559         proc_net_remove("rose_nodes");
1560         proc_net_remove("rose_routes");
1561         rose_loopback_clear();
1562
1563         rose_rt_free();
1564
1565         ax25_protocol_release(AX25_P_ROSE);
1566         ax25_linkfail_release(rose_link_failed);
1567
1568         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1569                 ax25_listen_release(&rose_callsign, NULL);
1570
1571 #ifdef CONFIG_SYSCTL
1572         rose_unregister_sysctl();
1573 #endif
1574         unregister_netdevice_notifier(&rose_dev_notifier);
1575
1576         sock_unregister(PF_ROSE);
1577
1578         for (i = 0; i < rose_ndevs; i++) {
1579                 struct net_device *dev = dev_rose[i];
1580
1581                 if (dev) {
1582                         unregister_netdev(dev);
1583                         kfree(dev);
1584                 }
1585         }
1586
1587         kfree(dev_rose);
1588 }
1589
1590 module_exit(rose_exit);