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 spinlock_t rose_list_lock = SPIN_LOCK_UNLOCKED;
  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 static struct sock *rose_alloc_sock(void)
 130 {
 131         rose_cb *rose;
 132         struct sock *sk = sk_alloc(PF_ROSE, GFP_ATOMIC, 1, NULL);
 133
 134         if (!sk)
 135                 goto out;
 136
 137         rose = sk->sk_protinfo = kmalloc(sizeof(*rose), GFP_ATOMIC);
 138         if (!rose)
 139                 goto frees;
 140
 141         memset(rose, 0x00, sizeof(*rose));
 142         rose->sk = sk;
 143 out:
 144         return sk;
 145 frees:
 146         sk_free(sk);
 147         sk = NULL;
 148         goto out;
 149 }
 150
 151 /*
 152  *      Socket removal during an interrupt is now safe.
 153  */
 154 static void rose_remove_socket(struct sock *sk)
 155 {
 156         spin_lock_bh(&rose_list_lock);
 157         sk_del_node_init(sk);
 158         spin_unlock_bh(&rose_list_lock);
 159 }
 160
 161 /*
 162  *      Kill all bound sockets on a broken link layer connection to a
 163  *      particular neighbour.
 164  */
 165 void rose_kill_by_neigh(struct rose_neigh *neigh)
 166 {
 167         struct sock *s;
 168         struct hlist_node *node;
 169
 170         spin_lock_bh(&rose_list_lock);
 171         sk_for_each(s, node, &rose_list) {
 172                 rose_cb *rose = rose_sk(s);
 173
 174                 if (rose->neighbour == neigh) {
 175                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 176                         rose->neighbour->use--;
 177                         rose->neighbour = NULL;
 178                 }
 179         }
 180         spin_unlock_bh(&rose_list_lock);
 181 }
 182
 183 /*
 184  *      Kill all bound sockets on a dropped device.
 185  */
 186 static void rose_kill_by_device(struct net_device *dev)
 187 {
 188         struct sock *s;
 189         struct hlist_node *node;
 190
 191         spin_lock_bh(&rose_list_lock);
 192         sk_for_each(s, node, &rose_list) {
 193                 rose_cb *rose = rose_sk(s);
 194
 195                 if (rose->device == dev) {
 196                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 197                         rose->neighbour->use--;
 198                         rose->device = NULL;
 199                 }
 200         }
 201         spin_unlock_bh(&rose_list_lock);
 202 }
 203
 204 /*
 205  *      Handle device status changes.
 206  */
 207 static int rose_device_event(struct notifier_block *this, unsigned long event,
 208         void *ptr)
 209 {
 210         struct net_device *dev = (struct net_device *)ptr;
 211
 212         if (event != NETDEV_DOWN)
 213                 return NOTIFY_DONE;
 214
 215         switch (dev->type) {
 216         case ARPHRD_ROSE:
 217                 rose_kill_by_device(dev);
 218                 break;
 219         case ARPHRD_AX25:
 220                 rose_link_device_down(dev);
 221                 rose_rt_device_down(dev);
 222                 break;
 223         }
 224
 225         return NOTIFY_DONE;
 226 }
 227
 228 /*
 229  *      Add a socket to the bound sockets list.
 230  */
 231 static void rose_insert_socket(struct sock *sk)
 232 {
 233
 234         spin_lock_bh(&rose_list_lock);
 235         sk_add_node(sk, &rose_list);
 236         spin_unlock_bh(&rose_list_lock);
 237 }
 238
 239 /*
 240  *      Find a socket that wants to accept the Call Request we just
 241  *      received.
 242  */
 243 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 244 {
 245         struct sock *s;
 246         struct hlist_node *node;
 247
 248         spin_lock_bh(&rose_list_lock);
 249         sk_for_each(s, node, &rose_list) {
 250                 rose_cb *rose = rose_sk(s);
 251
 252                 if (!rosecmp(&rose->source_addr, addr) &&
 253                     !ax25cmp(&rose->source_call, call) &&
 254                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 255                         goto found;
 256         }
 257
 258         sk_for_each(s, node, &rose_list) {
 259                 rose_cb *rose = rose_sk(s);
 260
 261                 if (!rosecmp(&rose->source_addr, addr) &&
 262                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 263                     s->sk_state == TCP_LISTEN)
 264                         goto found;
 265         }
 266         s = NULL;
 267 found:
 268         spin_unlock_bh(&rose_list_lock);
 269         return s;
 270 }
 271
 272 /*
 273  *      Find a connected ROSE socket given my LCI and device.
 274  */
 275 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 276 {
 277         struct sock *s;
 278         struct hlist_node *node;
 279
 280         spin_lock_bh(&rose_list_lock);
 281         sk_for_each(s, node, &rose_list) {
 282                 rose_cb *rose = rose_sk(s);
 283
 284                 if (rose->lci == lci && rose->neighbour == neigh)
 285                         goto found;
 286         }
 287         s = NULL;
 288 found:
 289         spin_unlock_bh(&rose_list_lock);
 290         return s;
 291 }
 292
 293 /*
 294  *      Find a unique LCI for a given device.
 295  */
 296 unsigned int rose_new_lci(struct rose_neigh *neigh)
 297 {
 298         int lci;
 299
 300         if (neigh->dce_mode) {
 301                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 302                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 303                                 return lci;
 304         } else {
 305                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 306                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 307                                 return lci;
 308         }
 309
 310         return 0;
 311 }
 312
 313 /*
 314  *      Deferred destroy.
 315  */
 316 void rose_destroy_socket(struct sock *);
 317
 318 /*
 319  *      Handler for deferred kills.
 320  */
 321 static void rose_destroy_timer(unsigned long data)
 322 {
 323         rose_destroy_socket((struct sock *)data);
 324 }
 325
 326 /*
 327  *      This is called from user mode and the timers. Thus it protects itself
 328  *      against interrupt users but doesn't worry about being called during
 329  *      work.  Once it is removed from the queue no interrupt or bottom half
 330  *      will touch it and we are (fairly 8-) ) safe.
 331  */
 332 void rose_destroy_socket(struct sock *sk)
 333 {
 334         struct sk_buff *skb;
 335
 336         rose_remove_socket(sk);
 337         rose_stop_heartbeat(sk);
 338         rose_stop_idletimer(sk);
 339         rose_stop_timer(sk);
 340
 341         rose_clear_queues(sk);          /* Flush the queues */
 342
 343         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 344                 if (skb->sk != sk) {    /* A pending connection */
 345                         /* Queue the unaccepted socket for death */
 346                         sock_set_flag(skb->sk, SOCK_DEAD);
 347                         rose_start_heartbeat(skb->sk);
 348                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 349                 }
 350
 351                 kfree_skb(skb);
 352         }
 353
 354         if (atomic_read(&sk->sk_wmem_alloc) ||
 355             atomic_read(&sk->sk_rmem_alloc)) {
 356                 /* Defer: outstanding buffers */
 357                 init_timer(&sk->sk_timer);
 358                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 359                 sk->sk_timer.function = rose_destroy_timer;
 360                 sk->sk_timer.data     = (unsigned long)sk;
 361                 add_timer(&sk->sk_timer);
 362         } else
 363                 sock_put(sk);
 364 }
 365
 366 /*
 367  *      Handling for system calls applied via the various interfaces to a
 368  *      ROSE socket object.
 369  */
 370
 371 static int rose_setsockopt(struct socket *sock, int level, int optname,
 372         char __user *optval, int optlen)
 373 {
 374         struct sock *sk = sock->sk;
 375         rose_cb *rose = rose_sk(sk);
 376         int opt;
 377
 378         if (level != SOL_ROSE)
 379                 return -ENOPROTOOPT;
 380
 381         if (optlen < sizeof(int))
 382                 return -EINVAL;
 383
 384         if (get_user(opt, (int __user *)optval))
 385                 return -EFAULT;
 386
 387         switch (optname) {
 388         case ROSE_DEFER:
 389                 rose->defer = opt ? 1 : 0;
 390                 return 0;
 391
 392         case ROSE_T1:
 393                 if (opt < 1)
 394                         return -EINVAL;
 395                 rose->t1 = opt * HZ;
 396                 return 0;
 397
 398         case ROSE_T2:
 399                 if (opt < 1)
 400                         return -EINVAL;
 401                 rose->t2 = opt * HZ;
 402                 return 0;
 403
 404         case ROSE_T3:
 405                 if (opt < 1)
 406                         return -EINVAL;
 407                 rose->t3 = opt * HZ;
 408                 return 0;
 409
 410         case ROSE_HOLDBACK:
 411                 if (opt < 1)
 412                         return -EINVAL;
 413                 rose->hb = opt * HZ;
 414                 return 0;
 415
 416         case ROSE_IDLE:
 417                 if (opt < 0)
 418                         return -EINVAL;
 419                 rose->idle = opt * 60 * HZ;
 420                 return 0;
 421
 422         case ROSE_QBITINCL:
 423                 rose->qbitincl = opt ? 1 : 0;
 424                 return 0;
 425
 426         default:
 427                 return -ENOPROTOOPT;
 428         }
 429 }
 430
 431 static int rose_getsockopt(struct socket *sock, int level, int optname,
 432         char __user *optval, int __user *optlen)
 433 {
 434         struct sock *sk = sock->sk;
 435         rose_cb *rose = rose_sk(sk);
 436         int val = 0;
 437         int len;
 438
 439         if (level != SOL_ROSE)
 440                 return -ENOPROTOOPT;
 441
 442         if (get_user(len, optlen))
 443                 return -EFAULT;
 444
 445         if (len < 0)
 446                 return -EINVAL;
 447
 448         switch (optname) {
 449         case ROSE_DEFER:
 450                 val = rose->defer;
 451                 break;
 452
 453         case ROSE_T1:
 454                 val = rose->t1 / HZ;
 455                 break;
 456
 457         case ROSE_T2:
 458                 val = rose->t2 / HZ;
 459                 break;
 460
 461         case ROSE_T3:
 462                 val = rose->t3 / HZ;
 463                 break;
 464
 465         case ROSE_HOLDBACK:
 466                 val = rose->hb / HZ;
 467                 break;
 468
 469         case ROSE_IDLE:
 470                 val = rose->idle / (60 * HZ);
 471                 break;
 472
 473         case ROSE_QBITINCL:
 474                 val = rose->qbitincl;
 475                 break;
 476
 477         default:
 478                 return -ENOPROTOOPT;
 479         }
 480
 481         len = min_t(unsigned int, len, sizeof(int));
 482
 483         if (put_user(len, optlen))
 484                 return -EFAULT;
 485
 486         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 487 }
 488
 489 static int rose_listen(struct socket *sock, int backlog)
 490 {
 491         struct sock *sk = sock->sk;
 492
 493         if (sk->sk_state != TCP_LISTEN) {
 494                 rose_cb *rose = rose_sk(sk);
 495
 496                 rose->dest_ndigis = 0;
 497                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 498                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 499                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 500                 sk->sk_max_ack_backlog = backlog;
 501                 sk->sk_state           = TCP_LISTEN;
 502                 return 0;
 503         }
 504
 505         return -EOPNOTSUPP;
 506 }
 507
 508 static int rose_create(struct socket *sock, int protocol)
 509 {
 510         struct sock *sk;
 511         rose_cb *rose;
 512
 513         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 514                 return -ESOCKTNOSUPPORT;
 515
 516         if ((sk = rose_alloc_sock()) == NULL)
 517                 return -ENOMEM;
 518
 519         rose = rose_sk(sk);
 520
 521         sock_init_data(sock, sk);
 522         sk_set_owner(sk, THIS_MODULE);
 523
 524         skb_queue_head_init(&rose->ack_queue);
 525 #ifdef M_BIT
 526         skb_queue_head_init(&rose->frag_queue);
 527         rose->fraglen    = 0;
 528 #endif
 529
 530         sock->ops    = &rose_proto_ops;
 531         sk->sk_protocol = protocol;
 532
 533         init_timer(&rose->timer);
 534         init_timer(&rose->idletimer);
 535
 536         rose->t1   = sysctl_rose_call_request_timeout;
 537         rose->t2   = sysctl_rose_reset_request_timeout;
 538         rose->t3   = sysctl_rose_clear_request_timeout;
 539         rose->hb   = sysctl_rose_ack_hold_back_timeout;
 540         rose->idle = sysctl_rose_no_activity_timeout;
 541
 542         rose->state = ROSE_STATE_0;
 543
 544         return 0;
 545 }
 546
 547 static struct sock *rose_make_new(struct sock *osk)
 548 {
 549         struct sock *sk;
 550         rose_cb *rose, *orose;
 551
 552         if (osk->sk_type != SOCK_SEQPACKET)
 553                 return NULL;
 554
 555         if ((sk = rose_alloc_sock()) == NULL)
 556                 return NULL;
 557
 558         rose = rose_sk(sk);
 559
 560         sock_init_data(NULL, sk);
 561         sk_set_owner(sk, THIS_MODULE);
 562
 563         skb_queue_head_init(&rose->ack_queue);
 564 #ifdef M_BIT
 565         skb_queue_head_init(&rose->frag_queue);
 566         rose->fraglen  = 0;
 567 #endif
 568
 569         sk->sk_type     = osk->sk_type;
 570         sk->sk_socket   = osk->sk_socket;
 571         sk->sk_priority = osk->sk_priority;
 572         sk->sk_protocol = osk->sk_protocol;
 573         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 574         sk->sk_sndbuf   = osk->sk_sndbuf;
 575         sk->sk_debug    = osk->sk_debug;
 576         sk->sk_state    = TCP_ESTABLISHED;
 577         sk->sk_sleep    = osk->sk_sleep;
 578         sk->sk_zapped   = osk->sk_zapped;
 579
 580         init_timer(&rose->timer);
 581         init_timer(&rose->idletimer);
 582
 583         orose           = rose_sk(osk);
 584         rose->t1        = orose->t1;
 585         rose->t2        = orose->t2;
 586         rose->t3        = orose->t3;
 587         rose->hb        = orose->hb;
 588         rose->idle      = orose->idle;
 589         rose->defer     = orose->defer;
 590         rose->device    = orose->device;
 591         rose->qbitincl  = orose->qbitincl;
 592
 593         return sk;
 594 }
 595
 596 static int rose_release(struct socket *sock)
 597 {
 598         struct sock *sk = sock->sk;
 599         rose_cb *rose;
 600
 601         if (sk == NULL) return 0;
 602
 603         rose = rose_sk(sk);
 604
 605         switch (rose->state) {
 606         case ROSE_STATE_0:
 607                 rose_disconnect(sk, 0, -1, -1);
 608                 rose_destroy_socket(sk);
 609                 break;
 610
 611         case ROSE_STATE_2:
 612                 rose->neighbour->use--;
 613                 rose_disconnect(sk, 0, -1, -1);
 614                 rose_destroy_socket(sk);
 615                 break;
 616
 617         case ROSE_STATE_1:
 618         case ROSE_STATE_3:
 619         case ROSE_STATE_4:
 620         case ROSE_STATE_5:
 621                 rose_clear_queues(sk);
 622                 rose_stop_idletimer(sk);
 623                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 624                 rose_start_t3timer(sk);
 625                 rose->state  = ROSE_STATE_2;
 626                 sk->sk_state    = TCP_CLOSE;
 627                 sk->sk_shutdown |= SEND_SHUTDOWN;
 628                 sk->sk_state_change(sk);
 629                 sock_set_flag(sk, SOCK_DEAD);
 630                 sock_set_flag(sk, SOCK_DESTROY);
 631                 break;
 632
 633         default:
 634                 break;
 635         }
 636
 637         sock->sk = NULL;
 638
 639         return 0;
 640 }
 641
 642 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 643 {
 644         struct sock *sk = sock->sk;
 645         rose_cb *rose = rose_sk(sk);
 646         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 647         struct net_device *dev;
 648         ax25_address *user, *source;
 649         int n;
 650
 651         if (!sk->sk_zapped)
 652                 return -EINVAL;
 653
 654         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 655                 return -EINVAL;
 656
 657         if (addr->srose_family != AF_ROSE)
 658                 return -EINVAL;
 659
 660         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 661                 return -EINVAL;
 662
 663         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 664                 return -EINVAL;
 665
 666         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 667                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 668                 return -EADDRNOTAVAIL;
 669         }
 670
 671         source = &addr->srose_call;
 672
 673         if ((user = ax25_findbyuid(current->euid)) == NULL) {
 674                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 675                         return -EACCES;
 676                 user = source;
 677         }
 678
 679         rose->source_addr   = addr->srose_addr;
 680         rose->source_call   = *user;
 681         rose->device        = dev;
 682         rose->source_ndigis = addr->srose_ndigis;
 683
 684         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 685                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 686                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 687                         rose->source_digis[n] = full_addr->srose_digis[n];
 688         } else {
 689                 if (rose->source_ndigis == 1) {
 690                         rose->source_digis[0] = addr->srose_digi;
 691                 }
 692         }
 693
 694         rose_insert_socket(sk);
 695
 696         sk->sk_zapped = 0;
 697         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 698         return 0;
 699 }
 700
 701 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 702 {
 703         struct sock *sk = sock->sk;
 704         rose_cb *rose = rose_sk(sk);
 705         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 706         unsigned char cause, diagnostic;
 707         ax25_address *user;
 708         struct net_device *dev;
 709         int n;
 710
 711         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 712                 sock->state = SS_CONNECTED;
 713                 return 0;       /* Connect completed during a ERESTARTSYS event */
 714         }
 715
 716         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 717                 sock->state = SS_UNCONNECTED;
 718                 return -ECONNREFUSED;
 719         }
 720
 721         if (sk->sk_state == TCP_ESTABLISHED)
 722                 return -EISCONN;        /* No reconnect on a seqpacket socket */
 723
 724         sk->sk_state   = TCP_CLOSE;
 725         sock->state = SS_UNCONNECTED;
 726
 727         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 728                 return -EINVAL;
 729
 730         if (addr->srose_family != AF_ROSE)
 731                 return -EINVAL;
 732
 733         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 734                 return -EINVAL;
 735
 736         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 737                 return -EINVAL;
 738
 739         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 740         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 741                 return -EINVAL;
 742
 743         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 744                                          &diagnostic);
 745         if (!rose->neighbour)
 746                 return -ENETUNREACH;
 747
 748         rose->lci = rose_new_lci(rose->neighbour);
 749         if (!rose->lci)
 750                 return -ENETUNREACH;
 751
 752         if (sk->sk_zapped) {    /* Must bind first - autobinding in this may or may not work */
 753                 sk->sk_zapped = 0;
 754
 755                 if ((dev = rose_dev_first()) == NULL)
 756                         return -ENETUNREACH;
 757
 758                 if ((user = ax25_findbyuid(current->euid)) == NULL)
 759                         return -EINVAL;
 760
 761                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 762                 rose->source_call = *user;
 763                 rose->device      = dev;
 764
 765                 rose_insert_socket(sk);         /* Finish the bind */
 766         }
 767
 768         rose->dest_addr   = addr->srose_addr;
 769         rose->dest_call   = addr->srose_call;
 770         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 771         rose->dest_ndigis = addr->srose_ndigis;
 772
 773         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 774                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 775                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 776                         rose->dest_digis[n] = full_addr->srose_digis[n];
 777         } else {
 778                 if (rose->dest_ndigis == 1) {
 779                         rose->dest_digis[0] = addr->srose_digi;
 780                 }
 781         }
 782
 783         /* Move to connecting socket, start sending Connect Requests */
 784         sock->state   = SS_CONNECTING;
 785         sk->sk_state     = TCP_SYN_SENT;
 786
 787         rose->state = ROSE_STATE_1;
 788
 789         rose->neighbour->use++;
 790
 791         rose_write_internal(sk, ROSE_CALL_REQUEST);
 792         rose_start_heartbeat(sk);
 793         rose_start_t1timer(sk);
 794
 795         /* Now the loop */
 796         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
 797                 return -EINPROGRESS;
 798
 799         /*
 800          * A Connect Ack with Choke or timeout or failed routing will go to
 801          * closed.
 802          */
 803         if (sk->sk_state == TCP_SYN_SENT) {
 804                 struct task_struct *tsk = current;
 805                 DECLARE_WAITQUEUE(wait, tsk);
 806
 807                 add_wait_queue(sk->sk_sleep, &wait);
 808                 for (;;) {
 809                         set_current_state(TASK_INTERRUPTIBLE);
 810                         if (sk->sk_state != TCP_SYN_SENT)
 811                                 break;
 812                         if (!signal_pending(tsk)) {
 813                                 schedule();
 814                                 continue;
 815                         }
 816                         current->state = TASK_RUNNING;
 817                         remove_wait_queue(sk->sk_sleep, &wait);
 818                         return -ERESTARTSYS;
 819                 }
 820                 current->state = TASK_RUNNING;
 821                 remove_wait_queue(sk->sk_sleep, &wait);
 822         }
 823
 824         if (sk->sk_state != TCP_ESTABLISHED) {
 825                 sock->state = SS_UNCONNECTED;
 826                 return sock_error(sk);  /* Always set at this point */
 827         }
 828
 829         sock->state = SS_CONNECTED;
 830
 831         return 0;
 832 }
 833
 834 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 835 {
 836         struct task_struct *tsk = current;
 837         DECLARE_WAITQUEUE(wait, tsk);
 838         struct sk_buff *skb;
 839         struct sock *newsk;
 840         struct sock *sk;
 841         int err = 0;
 842
 843         if ((sk = sock->sk) == NULL)
 844                 return -EINVAL;
 845
 846         lock_sock(sk);
 847         if (sk->sk_type != SOCK_SEQPACKET) {
 848                 err = -EOPNOTSUPP;
 849                 goto out;
 850         }
 851
 852         if (sk->sk_state != TCP_LISTEN) {
 853                 err = -EINVAL;
 854                 goto out;
 855         }
 856
 857         /*
 858          *      The write queue this time is holding sockets ready to use
 859          *      hooked into the SABM we saved
 860          */
 861         add_wait_queue(sk->sk_sleep, &wait);
 862         for (;;) {
 863                 skb = skb_dequeue(&sk->sk_receive_queue);
 864                 if (skb)
 865                         break;
 866
 867                 current->state = TASK_INTERRUPTIBLE;
 868                 release_sock(sk);
 869                 if (flags & O_NONBLOCK) {
 870                         current->state = TASK_RUNNING;
 871                         remove_wait_queue(sk->sk_sleep, &wait);
 872                         return -EWOULDBLOCK;
 873                 }
 874                 if (!signal_pending(tsk)) {
 875                         schedule();
 876                         lock_sock(sk);
 877                         continue;
 878                 }
 879                 return -ERESTARTSYS;
 880         }
 881         current->state = TASK_RUNNING;
 882         remove_wait_queue(sk->sk_sleep, &wait);
 883
 884         newsk = skb->sk;
 885         newsk->sk_pair = NULL;
 886         newsk->sk_socket = newsock;
 887         newsk->sk_sleep = &newsock->wait;
 888
 889         /* Now attach up the new socket */
 890         skb->sk = NULL;
 891         kfree_skb(skb);
 892         sk->sk_ack_backlog--;
 893         newsock->sk = newsk;
 894
 895 out:
 896         release_sock(sk);
 897
 898         return err;
 899 }
 900
 901 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 902         int *uaddr_len, int peer)
 903 {
 904         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 905         struct sock *sk = sock->sk;
 906         rose_cb *rose = rose_sk(sk);
 907         int n;
 908
 909         if (peer != 0) {
 910                 if (sk->sk_state != TCP_ESTABLISHED)
 911                         return -ENOTCONN;
 912                 srose->srose_family = AF_ROSE;
 913                 srose->srose_addr   = rose->dest_addr;
 914                 srose->srose_call   = rose->dest_call;
 915                 srose->srose_ndigis = rose->dest_ndigis;
 916                 for (n = 0; n < rose->dest_ndigis; n++)
 917                         srose->srose_digis[n] = rose->dest_digis[n];
 918         } else {
 919                 srose->srose_family = AF_ROSE;
 920                 srose->srose_addr   = rose->source_addr;
 921                 srose->srose_call   = rose->source_call;
 922                 srose->srose_ndigis = rose->source_ndigis;
 923                 for (n = 0; n < rose->source_ndigis; n++)
 924                         srose->srose_digis[n] = rose->source_digis[n];
 925         }
 926
 927         *uaddr_len = sizeof(struct full_sockaddr_rose);
 928         return 0;
 929 }
 930
 931 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 932 {
 933         struct sock *sk;
 934         struct sock *make;
 935         rose_cb *make_rose;
 936         struct rose_facilities_struct facilities;
 937         int n, len;
 938
 939         skb->sk = NULL;         /* Initially we don't know who it's for */
 940
 941         /*
 942          *      skb->data points to the rose frame start
 943          */
 944         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 945
 946         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 947         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 948         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 949                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 950                 return 0;
 951         }
 952
 953         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 954
 955         /*
 956          * We can't accept the Call Request.
 957          */
 958         if (!sk || sk->sk_ack_backlog == sk->sk_max_ack_backlog ||
 959             (make = rose_make_new(sk)) == NULL) {
 960                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 961                 return 0;
 962         }
 963
 964         skb->sk     = make;
 965         make->sk_state = TCP_ESTABLISHED;
 966         make_rose = rose_sk(make);
 967
 968         make_rose->lci           = lci;
 969         make_rose->dest_addr     = facilities.dest_addr;
 970         make_rose->dest_call     = facilities.dest_call;
 971         make_rose->dest_ndigis   = facilities.dest_ndigis;
 972         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 973                 make_rose->dest_digis[n] = facilities.dest_digis[n];
 974         make_rose->source_addr   = facilities.source_addr;
 975         make_rose->source_call   = facilities.source_call;
 976         make_rose->source_ndigis = facilities.source_ndigis;
 977         for (n = 0 ; n < facilities.source_ndigis ; n++)
 978                 make_rose->source_digis[n]= facilities.source_digis[n];
 979         make_rose->neighbour     = neigh;
 980         make_rose->device        = dev;
 981         make_rose->facilities    = facilities;
 982
 983         make_rose->neighbour->use++;
 984
 985         if (rose_sk(sk)->defer) {
 986                 make_rose->state = ROSE_STATE_5;
 987         } else {
 988                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
 989                 make_rose->state = ROSE_STATE_3;
 990                 rose_start_idletimer(make);
 991         }
 992
 993         make_rose->condition = 0x00;
 994         make_rose->vs        = 0;
 995         make_rose->va        = 0;
 996         make_rose->vr        = 0;
 997         make_rose->vl        = 0;
 998         sk->sk_ack_backlog++;
 999         make->sk_pair = sk;
1000
1001         rose_insert_socket(make);
1002
1003         skb_queue_head(&sk->sk_receive_queue, skb);
1004
1005         rose_start_heartbeat(make);
1006
1007         if (!sock_flag(sk, SOCK_DEAD))
1008                 sk->sk_data_ready(sk, skb->len);
1009
1010         return 1;
1011 }
1012
1013 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1014                         struct msghdr *msg, size_t len)
1015 {
1016         struct sock *sk = sock->sk;
1017         rose_cb *rose = rose_sk(sk);
1018         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1019         int err;
1020         struct full_sockaddr_rose srose;
1021         struct sk_buff *skb;
1022         unsigned char *asmptr;
1023         int n, size, qbit = 0;
1024
1025         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1026                 return -EINVAL;
1027
1028         if (sk->sk_zapped)
1029                 return -EADDRNOTAVAIL;
1030
1031         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1032                 send_sig(SIGPIPE, current, 0);
1033                 return -EPIPE;
1034         }
1035
1036         if (rose->neighbour == NULL || rose->device == NULL)
1037                 return -ENETUNREACH;
1038
1039         if (usrose != NULL) {
1040                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1041                         return -EINVAL;
1042                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1043                 memcpy(&srose, usrose, msg->msg_namelen);
1044                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1045                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1046                         return -EISCONN;
1047                 if (srose.srose_ndigis != rose->dest_ndigis)
1048                         return -EISCONN;
1049                 if (srose.srose_ndigis == rose->dest_ndigis) {
1050                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1051                                 if (ax25cmp(&rose->dest_digis[n],
1052                                             &srose.srose_digis[n]))
1053                                         return -EISCONN;
1054                 }
1055                 if (srose.srose_family != AF_ROSE)
1056                         return -EINVAL;
1057         } else {
1058                 if (sk->sk_state != TCP_ESTABLISHED)
1059                         return -ENOTCONN;
1060
1061                 srose.srose_family = AF_ROSE;
1062                 srose.srose_addr   = rose->dest_addr;
1063                 srose.srose_call   = rose->dest_call;
1064                 srose.srose_ndigis = rose->dest_ndigis;
1065                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1066                         srose.srose_digis[n] = rose->dest_digis[n];
1067         }
1068
1069         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1070
1071         /* Build a packet */
1072         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1073         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1074
1075         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1076                 return err;
1077
1078         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1079
1080         /*
1081          *      Put the data on the end
1082          */
1083         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1084
1085         asmptr = skb->h.raw = skb_put(skb, len);
1086
1087         err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1088         if (err) {
1089                 kfree_skb(skb);
1090                 return err;
1091         }
1092
1093         /*
1094          *      If the Q BIT Include socket option is in force, the first
1095          *      byte of the user data is the logical value of the Q Bit.
1096          */
1097         if (rose->qbitincl) {
1098                 qbit = skb->data[0];
1099                 skb_pull(skb, 1);
1100         }
1101
1102         /*
1103          *      Push down the ROSE header
1104          */
1105         asmptr = skb_push(skb, ROSE_MIN_LEN);
1106
1107         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1108
1109         /* Build a ROSE Network header */
1110         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1111         asmptr[1] = (rose->lci >> 0) & 0xFF;
1112         asmptr[2] = ROSE_DATA;
1113
1114         if (qbit)
1115                 asmptr[0] |= ROSE_Q_BIT;
1116
1117         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1118
1119         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1120
1121         if (sk->sk_state != TCP_ESTABLISHED) {
1122                 kfree_skb(skb);
1123                 return -ENOTCONN;
1124         }
1125
1126 #ifdef M_BIT
1127 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1128         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1129                 unsigned char header[ROSE_MIN_LEN];
1130                 struct sk_buff *skbn;
1131                 int frontlen;
1132                 int lg;
1133
1134                 /* Save a copy of the Header */
1135                 memcpy(header, skb->data, ROSE_MIN_LEN);
1136                 skb_pull(skb, ROSE_MIN_LEN);
1137
1138                 frontlen = skb_headroom(skb);
1139
1140                 while (skb->len > 0) {
1141                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1142                                 kfree_skb(skb);
1143                                 return err;
1144                         }
1145
1146                         skbn->sk   = sk;
1147                         skbn->free = 1;
1148                         skbn->arp  = 1;
1149
1150                         skb_reserve(skbn, frontlen);
1151
1152                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1153
1154                         /* Copy the user data */
1155                         memcpy(skb_put(skbn, lg), skb->data, lg);
1156                         skb_pull(skb, lg);
1157
1158                         /* Duplicate the Header */
1159                         skb_push(skbn, ROSE_MIN_LEN);
1160                         memcpy(skbn->data, header, ROSE_MIN_LEN);
1161
1162                         if (skb->len > 0)
1163                                 skbn->data[2] |= M_BIT;
1164
1165                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1166                 }
1167
1168                 skb->free = 1;
1169                 kfree_skb(skb);
1170         } else {
1171                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1172         }
1173 #else
1174         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1175 #endif
1176
1177         rose_kick(sk);
1178
1179         return len;
1180 }
1181
1182
1183 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1184                         struct msghdr *msg, size_t size, int flags)
1185 {
1186         struct sock *sk = sock->sk;
1187         rose_cb *rose = rose_sk(sk);
1188         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1189         size_t copied;
1190         unsigned char *asmptr;
1191         struct sk_buff *skb;
1192         int n, er, qbit;
1193
1194         /*
1195          * This works for seqpacket too. The receiver has ordered the queue for
1196          * us! We do one quick check first though
1197          */
1198         if (sk->sk_state != TCP_ESTABLISHED)
1199                 return -ENOTCONN;
1200
1201         /* Now we can treat all alike */
1202         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1203                 return er;
1204
1205         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1206
1207         skb_pull(skb, ROSE_MIN_LEN);
1208
1209         if (rose->qbitincl) {
1210                 asmptr  = skb_push(skb, 1);
1211                 *asmptr = qbit;
1212         }
1213
1214         skb->h.raw = skb->data;
1215         copied     = skb->len;
1216
1217         if (copied > size) {
1218                 copied = size;
1219                 msg->msg_flags |= MSG_TRUNC;
1220         }
1221
1222         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1223
1224         if (srose != NULL) {
1225                 srose->srose_family = AF_ROSE;
1226                 srose->srose_addr   = rose->dest_addr;
1227                 srose->srose_call   = rose->dest_call;
1228                 srose->srose_ndigis = rose->dest_ndigis;
1229                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1230                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1231                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1232                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1233                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1234                 } else {
1235                         if (rose->dest_ndigis >= 1) {
1236                                 srose->srose_ndigis = 1;
1237                                 srose->srose_digi = rose->dest_digis[0];
1238                         }
1239                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1240                 }
1241         }
1242
1243         skb_free_datagram(sk, skb);
1244
1245         return copied;
1246 }
1247
1248
1249 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1250 {
1251         struct sock *sk = sock->sk;
1252         rose_cb *rose = rose_sk(sk);
1253         void __user *argp = (void __user *)arg;
1254
1255         switch (cmd) {
1256         case TIOCOUTQ: {
1257                 long amount;
1258                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1259                 if (amount < 0)
1260                         amount = 0;
1261                 return put_user(amount, (unsigned int __user *)argp);
1262         }
1263
1264         case TIOCINQ: {
1265                 struct sk_buff *skb;
1266                 long amount = 0L;
1267                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1268                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1269                         amount = skb->len;
1270                 return put_user(amount, (unsigned int __user *)argp);
1271         }
1272
1273         case SIOCGSTAMP:
1274                 if (sk != NULL)
1275                         return sock_get_timestamp(sk, (struct timeval __user *)argp);
1276                 return -EINVAL;
1277
1278         case SIOCGIFADDR:
1279         case SIOCSIFADDR:
1280         case SIOCGIFDSTADDR:
1281         case SIOCSIFDSTADDR:
1282         case SIOCGIFBRDADDR:
1283         case SIOCSIFBRDADDR:
1284         case SIOCGIFNETMASK:
1285         case SIOCSIFNETMASK:
1286         case SIOCGIFMETRIC:
1287         case SIOCSIFMETRIC:
1288                 return -EINVAL;
1289
1290         case SIOCADDRT:
1291         case SIOCDELRT:
1292         case SIOCRSCLRRT:
1293                 if (!capable(CAP_NET_ADMIN))
1294                         return -EPERM;
1295                 return rose_rt_ioctl(cmd, argp);
1296
1297         case SIOCRSGCAUSE: {
1298                 struct rose_cause_struct rose_cause;
1299                 rose_cause.cause      = rose->cause;
1300                 rose_cause.diagnostic = rose->diagnostic;
1301                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1302         }
1303
1304         case SIOCRSSCAUSE: {
1305                 struct rose_cause_struct rose_cause;
1306                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1307                         return -EFAULT;
1308                 rose->cause      = rose_cause.cause;
1309                 rose->diagnostic = rose_cause.diagnostic;
1310                 return 0;
1311         }
1312
1313         case SIOCRSSL2CALL:
1314                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1315                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1316                         ax25_listen_release(&rose_callsign, NULL);
1317                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1318                         return -EFAULT;
1319                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1320                         ax25_listen_register(&rose_callsign, NULL);
1321                 return 0;
1322
1323         case SIOCRSGL2CALL:
1324                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1325
1326         case SIOCRSACCEPT:
1327                 if (rose->state == ROSE_STATE_5) {
1328                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1329                         rose_start_idletimer(sk);
1330                         rose->condition = 0x00;
1331                         rose->vs        = 0;
1332                         rose->va        = 0;
1333                         rose->vr        = 0;
1334                         rose->vl        = 0;
1335                         rose->state     = ROSE_STATE_3;
1336                 }
1337                 return 0;
1338
1339         default:
1340                 return dev_ioctl(cmd, argp);
1341         }
1342
1343         return 0;
1344 }
1345
1346 #ifdef CONFIG_PROC_FS
1347 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1348 {
1349         int i;
1350         struct sock *s;
1351         struct hlist_node *node;
1352
1353         spin_lock_bh(&rose_list_lock);
1354         if (*pos == 0)
1355                 return SEQ_START_TOKEN;
1356
1357         i = 1;
1358         sk_for_each(s, node, &rose_list) {
1359                 if (i == *pos)
1360                         return s;
1361                 ++i;
1362         }
1363         return NULL;
1364 }
1365
1366 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1367 {
1368         ++*pos;
1369
1370         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1371                 : sk_next((struct sock *)v);
1372 }
1373
1374 static void rose_info_stop(struct seq_file *seq, void *v)
1375 {
1376         spin_unlock_bh(&rose_list_lock);
1377 }
1378
1379 static int rose_info_show(struct seq_file *seq, void *v)
1380 {
1381         if (v == SEQ_START_TOKEN)
1382                 seq_puts(seq,
1383                          "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");
1384
1385         else {
1386                 struct sock *s = v;
1387                 rose_cb *rose = rose_sk(s);
1388                 const char *devname, *callsign;
1389                 const struct net_device *dev = rose->device;
1390
1391                 if (!dev)
1392                         devname = "???";
1393                 else
1394                         devname = dev->name;
1395
1396                 seq_printf(seq, "%-10s %-9s ",
1397                         rose2asc(&rose->dest_addr),
1398                         ax2asc(&rose->dest_call));
1399
1400                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1401                         callsign = "??????-?";
1402                 else
1403                         callsign = ax2asc(&rose->source_call);
1404
1405                 seq_printf(seq,
1406                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1407                         rose2asc(&rose->source_addr),
1408                         callsign,
1409                         devname,
1410                         rose->lci & 0x0FFF,
1411                         (rose->neighbour) ? rose->neighbour->number : 0,
1412                         rose->state,
1413                         rose->vs,
1414                         rose->vr,
1415                         rose->va,
1416                         ax25_display_timer(&rose->timer) / HZ,
1417                         rose->t1 / HZ,
1418                         rose->t2 / HZ,
1419                         rose->t3 / HZ,
1420                         rose->hb / HZ,
1421                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1422                         rose->idle / (60 * HZ),
1423                         atomic_read(&s->sk_wmem_alloc),
1424                         atomic_read(&s->sk_rmem_alloc),
1425                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1426         }
1427
1428         return 0;
1429 }
1430
1431 static struct seq_operations rose_info_seqops = {
1432         .start = rose_info_start,
1433         .next = rose_info_next,
1434         .stop = rose_info_stop,
1435         .show = rose_info_show,
1436 };
1437
1438 static int rose_info_open(struct inode *inode, struct file *file)
1439 {
1440         return seq_open(file, &rose_info_seqops);
1441 }
1442
1443 static struct file_operations rose_info_fops = {
1444         .owner = THIS_MODULE,
1445         .open = rose_info_open,
1446         .read = seq_read,
1447         .llseek = seq_lseek,
1448         .release = seq_release,
1449 };
1450 #endif  /* CONFIG_PROC_FS */
1451
1452 static struct net_proto_family rose_family_ops = {
1453         .family         =       PF_ROSE,
1454         .create         =       rose_create,
1455         .owner          =       THIS_MODULE,
1456 };
1457
1458 static struct proto_ops rose_proto_ops = {
1459         .family         =       PF_ROSE,
1460         .owner          =       THIS_MODULE,
1461         .release        =       rose_release,
1462         .bind           =       rose_bind,
1463         .connect        =       rose_connect,
1464         .socketpair     =       sock_no_socketpair,
1465         .accept         =       rose_accept,
1466         .getname        =       rose_getname,
1467         .poll           =       datagram_poll,
1468         .ioctl          =       rose_ioctl,
1469         .listen         =       rose_listen,
1470         .shutdown       =       sock_no_shutdown,
1471         .setsockopt     =       rose_setsockopt,
1472         .getsockopt     =       rose_getsockopt,
1473         .sendmsg        =       rose_sendmsg,
1474         .recvmsg        =       rose_recvmsg,
1475         .mmap           =       sock_no_mmap,
1476         .sendpage       =       sock_no_sendpage,
1477 };
1478
1479 static struct notifier_block rose_dev_notifier = {
1480         .notifier_call  =       rose_device_event,
1481 };
1482
1483 static struct net_device **dev_rose;
1484
1485 static const char banner[] = KERN_INFO "F6FBB/G4KLX ROSE for Linux. Version 0.62 for AX25.037 Linux 2.4\n";
1486
1487 static int __init rose_proto_init(void)
1488 {
1489         int i;
1490
1491         rose_callsign = null_ax25_address;
1492
1493         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1494                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1495                 return -1;
1496         }
1497
1498         dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1499         if (dev_rose == NULL) {
1500                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1501                 return -1;
1502         }
1503
1504         memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*));
1505         for (i = 0; i < rose_ndevs; i++) {
1506                 struct net_device *dev;
1507                 char name[IFNAMSIZ];
1508
1509                 sprintf(name, "rose%d", i);
1510                 dev = alloc_netdev(sizeof(struct net_device_stats),
1511                                    name, rose_setup);
1512                 if (!dev) {
1513                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1514                         goto fail;
1515                 }
1516                 if (register_netdev(dev)) {
1517                         printk(KERN_ERR "ROSE: netdevice regeistration failed\n");
1518                         free_netdev(dev);
1519                         goto fail;
1520                 }
1521                 dev_rose[i] = dev;
1522         }
1523
1524         sock_register(&rose_family_ops);
1525         register_netdevice_notifier(&rose_dev_notifier);
1526         printk(banner);
1527
1528         ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1529         ax25_linkfail_register(rose_link_failed);
1530
1531 #ifdef CONFIG_SYSCTL
1532         rose_register_sysctl();
1533 #endif
1534         rose_loopback_init();
1535
1536         rose_add_loopback_neigh();
1537
1538         proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1539         proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1540         proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1541         proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1542
1543         return 0;
1544 fail:
1545         while (--i >= 0) {
1546                 unregister_netdev(dev_rose[i]);
1547                 free_netdev(dev_rose[i]);
1548         }
1549         kfree(dev_rose);
1550         return -ENOMEM;
1551 }
1552 module_init(rose_proto_init);
1553
1554 module_param(rose_ndevs, int, 0);
1555 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1556
1557 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1558 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1559 MODULE_LICENSE("GPL");
1560 MODULE_ALIAS_NETPROTO(PF_ROSE);
1561
1562 static void __exit rose_exit(void)
1563 {
1564         int i;
1565
1566         proc_net_remove("rose");
1567         proc_net_remove("rose_neigh");
1568         proc_net_remove("rose_nodes");
1569         proc_net_remove("rose_routes");
1570         rose_loopback_clear();
1571
1572         rose_rt_free();
1573
1574         ax25_protocol_release(AX25_P_ROSE);
1575         ax25_linkfail_release(rose_link_failed);
1576
1577         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1578                 ax25_listen_release(&rose_callsign, NULL);
1579
1580 #ifdef CONFIG_SYSCTL
1581         rose_unregister_sysctl();
1582 #endif
1583         unregister_netdevice_notifier(&rose_dev_notifier);
1584
1585         sock_unregister(PF_ROSE);
1586
1587         for (i = 0; i < rose_ndevs; i++) {
1588                 struct net_device *dev = dev_rose[i];
1589
1590                 if (dev) {
1591                         unregister_netdev(dev);
1592                         free_netdev(dev);
1593                 }
1594         }
1595
1596         kfree(dev_rose);
1597 }
1598
1599 module_exit(rose_exit);