net/rose/af_rose.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   8  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   9  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
  10  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
  11  */
  12
  13 #include <linux/config.h>
  14 #include <linux/capability.h>
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/errno.h>
  19 #include <linux/types.h>
  20 #include <linux/socket.h>
  21 #include <linux/in.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/timer.h>
  26 #include <linux/string.h>
  27 #include <linux/sockios.h>
  28 #include <linux/net.h>
  29 #include <linux/stat.h>
  30 #include <net/ax25.h>
  31 #include <linux/inet.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/if_arp.h>
  34 #include <linux/skbuff.h>
  35 #include <net/sock.h>
  36 #include <asm/system.h>
  37 #include <asm/uaccess.h>
  38 #include <linux/fcntl.h>
  39 #include <linux/termios.h>
  40 #include <linux/mm.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/notifier.h>
  43 #include <net/rose.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/seq_file.h>
  46 #include <net/tcp_states.h>
  47 #include <net/ip.h>
  48 #include <net/arp.h>
  49
  50 static int rose_ndevs = 10;
  51
  52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  53 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  54 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  55 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  56 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  57 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  58 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  59 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  60 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  61 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  62
  63 static HLIST_HEAD(rose_list);
  64 static DEFINE_SPINLOCK(rose_list_lock);
  65
  66 static struct proto_ops rose_proto_ops;
  67
  68 ax25_address rose_callsign;
  69
  70 /*
  71  *      Convert a ROSE address into text.
  72  */
  73 const char *rose2asc(const rose_address *addr)
  74 {
  75         static char buffer[11];
  76
  77         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  78             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  79             addr->rose_addr[4] == 0x00) {
  80                 strcpy(buffer, "*");
  81         } else {
  82                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
  83                                                 addr->rose_addr[1] & 0xFF,
  84                                                 addr->rose_addr[2] & 0xFF,
  85                                                 addr->rose_addr[3] & 0xFF,
  86                                                 addr->rose_addr[4] & 0xFF);
  87         }
  88
  89         return buffer;
  90 }
  91
  92 /*
  93  *      Compare two ROSE addresses, 0 == equal.
  94  */
  95 int rosecmp(rose_address *addr1, rose_address *addr2)
  96 {
  97         int i;
  98
  99         for (i = 0; i < 5; i++)
 100                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 101                         return 1;
 102
 103         return 0;
 104 }
 105
 106 /*
 107  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 108  */
 109 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 110 {
 111         int i, j;
 112
 113         if (mask > 10)
 114                 return 1;
 115
 116         for (i = 0; i < mask; i++) {
 117                 j = i / 2;
 118
 119                 if ((i % 2) != 0) {
 120                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 121                                 return 1;
 122                 } else {
 123                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 124                                 return 1;
 125                 }
 126         }
 127
 128         return 0;
 129 }
 130
 131 /*
 132  *      Socket removal during an interrupt is now safe.
 133  */
 134 static void rose_remove_socket(struct sock *sk)
 135 {
 136         spin_lock_bh(&rose_list_lock);
 137         sk_del_node_init(sk);
 138         spin_unlock_bh(&rose_list_lock);
 139 }
 140
 141 /*
 142  *      Kill all bound sockets on a broken link layer connection to a
 143  *      particular neighbour.
 144  */
 145 void rose_kill_by_neigh(struct rose_neigh *neigh)
 146 {
 147         struct sock *s;
 148         struct hlist_node *node;
 149
 150         spin_lock_bh(&rose_list_lock);
 151         sk_for_each(s, node, &rose_list) {
 152                 struct rose_sock *rose = rose_sk(s);
 153
 154                 if (rose->neighbour == neigh) {
 155                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 156                         rose->neighbour->use--;
 157                         rose->neighbour = NULL;
 158                 }
 159         }
 160         spin_unlock_bh(&rose_list_lock);
 161 }
 162
 163 /*
 164  *      Kill all bound sockets on a dropped device.
 165  */
 166 static void rose_kill_by_device(struct net_device *dev)
 167 {
 168         struct sock *s;
 169         struct hlist_node *node;
 170
 171         spin_lock_bh(&rose_list_lock);
 172         sk_for_each(s, node, &rose_list) {
 173                 struct rose_sock *rose = rose_sk(s);
 174
 175                 if (rose->device == dev) {
 176                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 177                         rose->neighbour->use--;
 178                         rose->device = NULL;
 179                 }
 180         }
 181         spin_unlock_bh(&rose_list_lock);
 182 }
 183
 184 /*
 185  *      Handle device status changes.
 186  */
 187 static int rose_device_event(struct notifier_block *this, unsigned long event,
 188         void *ptr)
 189 {
 190         struct net_device *dev = (struct net_device *)ptr;
 191
 192         if (event != NETDEV_DOWN)
 193                 return NOTIFY_DONE;
 194
 195         switch (dev->type) {
 196         case ARPHRD_ROSE:
 197                 rose_kill_by_device(dev);
 198                 break;
 199         case ARPHRD_AX25:
 200                 rose_link_device_down(dev);
 201                 rose_rt_device_down(dev);
 202                 break;
 203         }
 204
 205         return NOTIFY_DONE;
 206 }
 207
 208 /*
 209  *      Add a socket to the bound sockets list.
 210  */
 211 static void rose_insert_socket(struct sock *sk)
 212 {
 213
 214         spin_lock_bh(&rose_list_lock);
 215         sk_add_node(sk, &rose_list);
 216         spin_unlock_bh(&rose_list_lock);
 217 }
 218
 219 /*
 220  *      Find a socket that wants to accept the Call Request we just
 221  *      received.
 222  */
 223 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 224 {
 225         struct sock *s;
 226         struct hlist_node *node;
 227
 228         spin_lock_bh(&rose_list_lock);
 229         sk_for_each(s, node, &rose_list) {
 230                 struct rose_sock *rose = rose_sk(s);
 231
 232                 if (!rosecmp(&rose->source_addr, addr) &&
 233                     !ax25cmp(&rose->source_call, call) &&
 234                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 235                         goto found;
 236         }
 237
 238         sk_for_each(s, node, &rose_list) {
 239                 struct rose_sock *rose = rose_sk(s);
 240
 241                 if (!rosecmp(&rose->source_addr, addr) &&
 242                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 243                     s->sk_state == TCP_LISTEN)
 244                         goto found;
 245         }
 246         s = NULL;
 247 found:
 248         spin_unlock_bh(&rose_list_lock);
 249         return s;
 250 }
 251
 252 /*
 253  *      Find a connected ROSE socket given my LCI and device.
 254  */
 255 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 256 {
 257         struct sock *s;
 258         struct hlist_node *node;
 259
 260         spin_lock_bh(&rose_list_lock);
 261         sk_for_each(s, node, &rose_list) {
 262                 struct rose_sock *rose = rose_sk(s);
 263
 264                 if (rose->lci == lci && rose->neighbour == neigh)
 265                         goto found;
 266         }
 267         s = NULL;
 268 found:
 269         spin_unlock_bh(&rose_list_lock);
 270         return s;
 271 }
 272
 273 /*
 274  *      Find a unique LCI for a given device.
 275  */
 276 unsigned int rose_new_lci(struct rose_neigh *neigh)
 277 {
 278         int lci;
 279
 280         if (neigh->dce_mode) {
 281                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 282                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 283                                 return lci;
 284         } else {
 285                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 286                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 287                                 return lci;
 288         }
 289
 290         return 0;
 291 }
 292
 293 /*
 294  *      Deferred destroy.
 295  */
 296 void rose_destroy_socket(struct sock *);
 297
 298 /*
 299  *      Handler for deferred kills.
 300  */
 301 static void rose_destroy_timer(unsigned long data)
 302 {
 303         rose_destroy_socket((struct sock *)data);
 304 }
 305
 306 /*
 307  *      This is called from user mode and the timers. Thus it protects itself
 308  *      against interrupt users but doesn't worry about being called during
 309  *      work.  Once it is removed from the queue no interrupt or bottom half
 310  *      will touch it and we are (fairly 8-) ) safe.
 311  */
 312 void rose_destroy_socket(struct sock *sk)
 313 {
 314         struct sk_buff *skb;
 315
 316         rose_remove_socket(sk);
 317         rose_stop_heartbeat(sk);
 318         rose_stop_idletimer(sk);
 319         rose_stop_timer(sk);
 320
 321         rose_clear_queues(sk);          /* Flush the queues */
 322
 323         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 324                 if (skb->sk != sk) {    /* A pending connection */
 325                         /* Queue the unaccepted socket for death */
 326                         sock_set_flag(skb->sk, SOCK_DEAD);
 327                         rose_start_heartbeat(skb->sk);
 328                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 329                 }
 330
 331                 kfree_skb(skb);
 332         }
 333
 334         if (atomic_read(&sk->sk_wmem_alloc) ||
 335             atomic_read(&sk->sk_rmem_alloc)) {
 336                 /* Defer: outstanding buffers */
 337                 init_timer(&sk->sk_timer);
 338                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 339                 sk->sk_timer.function = rose_destroy_timer;
 340                 sk->sk_timer.data     = (unsigned long)sk;
 341                 add_timer(&sk->sk_timer);
 342         } else
 343                 sock_put(sk);
 344 }
 345
 346 /*
 347  *      Handling for system calls applied via the various interfaces to a
 348  *      ROSE socket object.
 349  */
 350
 351 static int rose_setsockopt(struct socket *sock, int level, int optname,
 352         char __user *optval, int optlen)
 353 {
 354         struct sock *sk = sock->sk;
 355         struct rose_sock *rose = rose_sk(sk);
 356         int opt;
 357
 358         if (level != SOL_ROSE)
 359                 return -ENOPROTOOPT;
 360
 361         if (optlen < sizeof(int))
 362                 return -EINVAL;
 363
 364         if (get_user(opt, (int __user *)optval))
 365                 return -EFAULT;
 366
 367         switch (optname) {
 368         case ROSE_DEFER:
 369                 rose->defer = opt ? 1 : 0;
 370                 return 0;
 371
 372         case ROSE_T1:
 373                 if (opt < 1)
 374                         return -EINVAL;
 375                 rose->t1 = opt * HZ;
 376                 return 0;
 377
 378         case ROSE_T2:
 379                 if (opt < 1)
 380                         return -EINVAL;
 381                 rose->t2 = opt * HZ;
 382                 return 0;
 383
 384         case ROSE_T3:
 385                 if (opt < 1)
 386                         return -EINVAL;
 387                 rose->t3 = opt * HZ;
 388                 return 0;
 389
 390         case ROSE_HOLDBACK:
 391                 if (opt < 1)
 392                         return -EINVAL;
 393                 rose->hb = opt * HZ;
 394                 return 0;
 395
 396         case ROSE_IDLE:
 397                 if (opt < 0)
 398                         return -EINVAL;
 399                 rose->idle = opt * 60 * HZ;
 400                 return 0;
 401
 402         case ROSE_QBITINCL:
 403                 rose->qbitincl = opt ? 1 : 0;
 404                 return 0;
 405
 406         default:
 407                 return -ENOPROTOOPT;
 408         }
 409 }
 410
 411 static int rose_getsockopt(struct socket *sock, int level, int optname,
 412         char __user *optval, int __user *optlen)
 413 {
 414         struct sock *sk = sock->sk;
 415         struct rose_sock *rose = rose_sk(sk);
 416         int val = 0;
 417         int len;
 418
 419         if (level != SOL_ROSE)
 420                 return -ENOPROTOOPT;
 421
 422         if (get_user(len, optlen))
 423                 return -EFAULT;
 424
 425         if (len < 0)
 426                 return -EINVAL;
 427
 428         switch (optname) {
 429         case ROSE_DEFER:
 430                 val = rose->defer;
 431                 break;
 432
 433         case ROSE_T1:
 434                 val = rose->t1 / HZ;
 435                 break;
 436
 437         case ROSE_T2:
 438                 val = rose->t2 / HZ;
 439                 break;
 440
 441         case ROSE_T3:
 442                 val = rose->t3 / HZ;
 443                 break;
 444
 445         case ROSE_HOLDBACK:
 446                 val = rose->hb / HZ;
 447                 break;
 448
 449         case ROSE_IDLE:
 450                 val = rose->idle / (60 * HZ);
 451                 break;
 452
 453         case ROSE_QBITINCL:
 454                 val = rose->qbitincl;
 455                 break;
 456
 457         default:
 458                 return -ENOPROTOOPT;
 459         }
 460
 461         len = min_t(unsigned int, len, sizeof(int));
 462
 463         if (put_user(len, optlen))
 464                 return -EFAULT;
 465
 466         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 467 }
 468
 469 static int rose_listen(struct socket *sock, int backlog)
 470 {
 471         struct sock *sk = sock->sk;
 472
 473         if (sk->sk_state != TCP_LISTEN) {
 474                 struct rose_sock *rose = rose_sk(sk);
 475
 476                 rose->dest_ndigis = 0;
 477                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 478                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 479                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 480                 sk->sk_max_ack_backlog = backlog;
 481                 sk->sk_state           = TCP_LISTEN;
 482                 return 0;
 483         }
 484
 485         return -EOPNOTSUPP;
 486 }
 487
 488 static struct proto rose_proto = {
 489         .name     = "ROSE",
 490         .owner    = THIS_MODULE,
 491         .obj_size = sizeof(struct rose_sock),
 492 };
 493
 494 static int rose_create(struct socket *sock, int protocol)
 495 {
 496         struct sock *sk;
 497         struct rose_sock *rose;
 498
 499         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 500                 return -ESOCKTNOSUPPORT;
 501
 502         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 503                 return -ENOMEM;
 504
 505         rose = rose_sk(sk);
 506
 507         sock_init_data(sock, sk);
 508
 509         skb_queue_head_init(&rose->ack_queue);
 510 #ifdef M_BIT
 511         skb_queue_head_init(&rose->frag_queue);
 512         rose->fraglen    = 0;
 513 #endif
 514
 515         sock->ops    = &rose_proto_ops;
 516         sk->sk_protocol = protocol;
 517
 518         init_timer(&rose->timer);
 519         init_timer(&rose->idletimer);
 520
 521         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 522         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 523         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 524         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 525         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 526
 527         rose->state = ROSE_STATE_0;
 528
 529         return 0;
 530 }
 531
 532 static struct sock *rose_make_new(struct sock *osk)
 533 {
 534         struct sock *sk;
 535         struct rose_sock *rose, *orose;
 536
 537         if (osk->sk_type != SOCK_SEQPACKET)
 538                 return NULL;
 539
 540         if ((sk = sk_alloc(PF_ROSE, GFP_ATOMIC, &rose_proto, 1)) == NULL)
 541                 return NULL;
 542
 543         rose = rose_sk(sk);
 544
 545         sock_init_data(NULL, sk);
 546
 547         skb_queue_head_init(&rose->ack_queue);
 548 #ifdef M_BIT
 549         skb_queue_head_init(&rose->frag_queue);
 550         rose->fraglen  = 0;
 551 #endif
 552
 553         sk->sk_type     = osk->sk_type;
 554         sk->sk_socket   = osk->sk_socket;
 555         sk->sk_priority = osk->sk_priority;
 556         sk->sk_protocol = osk->sk_protocol;
 557         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 558         sk->sk_sndbuf   = osk->sk_sndbuf;
 559         sk->sk_state    = TCP_ESTABLISHED;
 560         sk->sk_sleep    = osk->sk_sleep;
 561         sock_copy_flags(sk, osk);
 562
 563         init_timer(&rose->timer);
 564         init_timer(&rose->idletimer);
 565
 566         orose           = rose_sk(osk);
 567         rose->t1        = orose->t1;
 568         rose->t2        = orose->t2;
 569         rose->t3        = orose->t3;
 570         rose->hb        = orose->hb;
 571         rose->idle      = orose->idle;
 572         rose->defer     = orose->defer;
 573         rose->device    = orose->device;
 574         rose->qbitincl  = orose->qbitincl;
 575
 576         return sk;
 577 }
 578
 579 static int rose_release(struct socket *sock)
 580 {
 581         struct sock *sk = sock->sk;
 582         struct rose_sock *rose;
 583
 584         if (sk == NULL) return 0;
 585
 586         rose = rose_sk(sk);
 587
 588         switch (rose->state) {
 589         case ROSE_STATE_0:
 590                 rose_disconnect(sk, 0, -1, -1);
 591                 rose_destroy_socket(sk);
 592                 break;
 593
 594         case ROSE_STATE_2:
 595                 rose->neighbour->use--;
 596                 rose_disconnect(sk, 0, -1, -1);
 597                 rose_destroy_socket(sk);
 598                 break;
 599
 600         case ROSE_STATE_1:
 601         case ROSE_STATE_3:
 602         case ROSE_STATE_4:
 603         case ROSE_STATE_5:
 604                 rose_clear_queues(sk);
 605                 rose_stop_idletimer(sk);
 606                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 607                 rose_start_t3timer(sk);
 608                 rose->state  = ROSE_STATE_2;
 609                 sk->sk_state    = TCP_CLOSE;
 610                 sk->sk_shutdown |= SEND_SHUTDOWN;
 611                 sk->sk_state_change(sk);
 612                 sock_set_flag(sk, SOCK_DEAD);
 613                 sock_set_flag(sk, SOCK_DESTROY);
 614                 break;
 615
 616         default:
 617                 break;
 618         }
 619
 620         sock->sk = NULL;
 621
 622         return 0;
 623 }
 624
 625 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 626 {
 627         struct sock *sk = sock->sk;
 628         struct rose_sock *rose = rose_sk(sk);
 629         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 630         struct net_device *dev;
 631         ax25_address *source;
 632         ax25_uid_assoc *user;
 633         int n;
 634
 635         if (!sock_flag(sk, SOCK_ZAPPED))
 636                 return -EINVAL;
 637
 638         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 639                 return -EINVAL;
 640
 641         if (addr->srose_family != AF_ROSE)
 642                 return -EINVAL;
 643
 644         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 645                 return -EINVAL;
 646
 647         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 648                 return -EINVAL;
 649
 650         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 651                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 652                 return -EADDRNOTAVAIL;
 653         }
 654
 655         source = &addr->srose_call;
 656
 657         user = ax25_findbyuid(current->euid);
 658         if (user) {
 659                 rose->source_call = user->call;
 660                 ax25_uid_put(user);
 661         } else {
 662                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 663                         return -EACCES;
 664                 rose->source_call   = *source;
 665         }
 666
 667         rose->source_addr   = addr->srose_addr;
 668         rose->device        = dev;
 669         rose->source_ndigis = addr->srose_ndigis;
 670
 671         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 672                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 673                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 674                         rose->source_digis[n] = full_addr->srose_digis[n];
 675         } else {
 676                 if (rose->source_ndigis == 1) {
 677                         rose->source_digis[0] = addr->srose_digi;
 678                 }
 679         }
 680
 681         rose_insert_socket(sk);
 682
 683         sock_reset_flag(sk, SOCK_ZAPPED);
 684         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 685         return 0;
 686 }
 687
 688 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 689 {
 690         struct sock *sk = sock->sk;
 691         struct rose_sock *rose = rose_sk(sk);
 692         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 693         unsigned char cause, diagnostic;
 694         struct net_device *dev;
 695         ax25_uid_assoc *user;
 696         int n;
 697
 698         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 699                 sock->state = SS_CONNECTED;
 700                 return 0;       /* Connect completed during a ERESTARTSYS event */
 701         }
 702
 703         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 704                 sock->state = SS_UNCONNECTED;
 705                 return -ECONNREFUSED;
 706         }
 707
 708         if (sk->sk_state == TCP_ESTABLISHED)
 709                 return -EISCONN;        /* No reconnect on a seqpacket socket */
 710
 711         sk->sk_state   = TCP_CLOSE;
 712         sock->state = SS_UNCONNECTED;
 713
 714         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 715                 return -EINVAL;
 716
 717         if (addr->srose_family != AF_ROSE)
 718                 return -EINVAL;
 719
 720         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 721                 return -EINVAL;
 722
 723         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 724                 return -EINVAL;
 725
 726         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 727         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 728                 return -EINVAL;
 729
 730         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 731                                          &diagnostic);
 732         if (!rose->neighbour)
 733                 return -ENETUNREACH;
 734
 735         rose->lci = rose_new_lci(rose->neighbour);
 736         if (!rose->lci)
 737                 return -ENETUNREACH;
 738
 739         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 740                 sock_reset_flag(sk, SOCK_ZAPPED);
 741
 742                 if ((dev = rose_dev_first()) == NULL)
 743                         return -ENETUNREACH;
 744
 745                 user = ax25_findbyuid(current->euid);
 746                 if (!user)
 747                         return -EINVAL;
 748
 749                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 750                 rose->source_call = user->call;
 751                 rose->device      = dev;
 752                 ax25_uid_put(user);
 753
 754                 rose_insert_socket(sk);         /* Finish the bind */
 755         }
 756
 757         rose->dest_addr   = addr->srose_addr;
 758         rose->dest_call   = addr->srose_call;
 759         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 760         rose->dest_ndigis = addr->srose_ndigis;
 761
 762         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 763                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 764                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 765                         rose->dest_digis[n] = full_addr->srose_digis[n];
 766         } else {
 767                 if (rose->dest_ndigis == 1) {
 768                         rose->dest_digis[0] = addr->srose_digi;
 769                 }
 770         }
 771
 772         /* Move to connecting socket, start sending Connect Requests */
 773         sock->state   = SS_CONNECTING;
 774         sk->sk_state     = TCP_SYN_SENT;
 775
 776         rose->state = ROSE_STATE_1;
 777
 778         rose->neighbour->use++;
 779
 780         rose_write_internal(sk, ROSE_CALL_REQUEST);
 781         rose_start_heartbeat(sk);
 782         rose_start_t1timer(sk);
 783
 784         /* Now the loop */
 785         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
 786                 return -EINPROGRESS;
 787
 788         /*
 789          * A Connect Ack with Choke or timeout or failed routing will go to
 790          * closed.
 791          */
 792         if (sk->sk_state == TCP_SYN_SENT) {
 793                 struct task_struct *tsk = current;
 794                 DECLARE_WAITQUEUE(wait, tsk);
 795
 796                 add_wait_queue(sk->sk_sleep, &wait);
 797                 for (;;) {
 798                         set_current_state(TASK_INTERRUPTIBLE);
 799                         if (sk->sk_state != TCP_SYN_SENT)
 800                                 break;
 801                         if (!signal_pending(tsk)) {
 802                                 schedule();
 803                                 continue;
 804                         }
 805                         current->state = TASK_RUNNING;
 806                         remove_wait_queue(sk->sk_sleep, &wait);
 807                         return -ERESTARTSYS;
 808                 }
 809                 current->state = TASK_RUNNING;
 810                 remove_wait_queue(sk->sk_sleep, &wait);
 811         }
 812
 813         if (sk->sk_state != TCP_ESTABLISHED) {
 814                 sock->state = SS_UNCONNECTED;
 815                 return sock_error(sk);  /* Always set at this point */
 816         }
 817
 818         sock->state = SS_CONNECTED;
 819
 820         return 0;
 821 }
 822
 823 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 824 {
 825         struct task_struct *tsk = current;
 826         DECLARE_WAITQUEUE(wait, tsk);
 827         struct sk_buff *skb;
 828         struct sock *newsk;
 829         struct sock *sk;
 830         int err = 0;
 831
 832         if ((sk = sock->sk) == NULL)
 833                 return -EINVAL;
 834
 835         lock_sock(sk);
 836         if (sk->sk_type != SOCK_SEQPACKET) {
 837                 err = -EOPNOTSUPP;
 838                 goto out;
 839         }
 840
 841         if (sk->sk_state != TCP_LISTEN) {
 842                 err = -EINVAL;
 843                 goto out;
 844         }
 845
 846         /*
 847          *      The write queue this time is holding sockets ready to use
 848          *      hooked into the SABM we saved
 849          */
 850         add_wait_queue(sk->sk_sleep, &wait);
 851         for (;;) {
 852                 skb = skb_dequeue(&sk->sk_receive_queue);
 853                 if (skb)
 854                         break;
 855
 856                 current->state = TASK_INTERRUPTIBLE;
 857                 release_sock(sk);
 858                 if (flags & O_NONBLOCK) {
 859                         current->state = TASK_RUNNING;
 860                         remove_wait_queue(sk->sk_sleep, &wait);
 861                         return -EWOULDBLOCK;
 862                 }
 863                 if (!signal_pending(tsk)) {
 864                         schedule();
 865                         lock_sock(sk);
 866                         continue;
 867                 }
 868                 return -ERESTARTSYS;
 869         }
 870         current->state = TASK_RUNNING;
 871         remove_wait_queue(sk->sk_sleep, &wait);
 872
 873         newsk = skb->sk;
 874         newsk->sk_socket = newsock;
 875         newsk->sk_sleep = &newsock->wait;
 876
 877         /* Now attach up the new socket */
 878         skb->sk = NULL;
 879         kfree_skb(skb);
 880         sk->sk_ack_backlog--;
 881         newsock->sk = newsk;
 882
 883 out:
 884         release_sock(sk);
 885
 886         return err;
 887 }
 888
 889 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 890         int *uaddr_len, int peer)
 891 {
 892         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 893         struct sock *sk = sock->sk;
 894         struct rose_sock *rose = rose_sk(sk);
 895         int n;
 896
 897         if (peer != 0) {
 898                 if (sk->sk_state != TCP_ESTABLISHED)
 899                         return -ENOTCONN;
 900                 srose->srose_family = AF_ROSE;
 901                 srose->srose_addr   = rose->dest_addr;
 902                 srose->srose_call   = rose->dest_call;
 903                 srose->srose_ndigis = rose->dest_ndigis;
 904                 for (n = 0; n < rose->dest_ndigis; n++)
 905                         srose->srose_digis[n] = rose->dest_digis[n];
 906         } else {
 907                 srose->srose_family = AF_ROSE;
 908                 srose->srose_addr   = rose->source_addr;
 909                 srose->srose_call   = rose->source_call;
 910                 srose->srose_ndigis = rose->source_ndigis;
 911                 for (n = 0; n < rose->source_ndigis; n++)
 912                         srose->srose_digis[n] = rose->source_digis[n];
 913         }
 914
 915         *uaddr_len = sizeof(struct full_sockaddr_rose);
 916         return 0;
 917 }
 918
 919 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 920 {
 921         struct sock *sk;
 922         struct sock *make;
 923         struct rose_sock *make_rose;
 924         struct rose_facilities_struct facilities;
 925         int n, len;
 926
 927         skb->sk = NULL;         /* Initially we don't know who it's for */
 928
 929         /*
 930          *      skb->data points to the rose frame start
 931          */
 932         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 933
 934         len  = (((skb->data[3] >> 4) & 0x0F) + 1) / 2;
 935         len += (((skb->data[3] >> 0) & 0x0F) + 1) / 2;
 936         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 937                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 938                 return 0;
 939         }
 940
 941         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 942
 943         /*
 944          * We can't accept the Call Request.
 945          */
 946         if (sk == NULL || sk_acceptq_is_full(sk) ||
 947             (make = rose_make_new(sk)) == NULL) {
 948                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 949                 return 0;
 950         }
 951
 952         skb->sk     = make;
 953         make->sk_state = TCP_ESTABLISHED;
 954         make_rose = rose_sk(make);
 955
 956         make_rose->lci           = lci;
 957         make_rose->dest_addr     = facilities.dest_addr;
 958         make_rose->dest_call     = facilities.dest_call;
 959         make_rose->dest_ndigis   = facilities.dest_ndigis;
 960         for (n = 0 ; n < facilities.dest_ndigis ; n++)
 961                 make_rose->dest_digis[n] = facilities.dest_digis[n];
 962         make_rose->source_addr   = facilities.source_addr;
 963         make_rose->source_call   = facilities.source_call;
 964         make_rose->source_ndigis = facilities.source_ndigis;
 965         for (n = 0 ; n < facilities.source_ndigis ; n++)
 966                 make_rose->source_digis[n]= facilities.source_digis[n];
 967         make_rose->neighbour     = neigh;
 968         make_rose->device        = dev;
 969         make_rose->facilities    = facilities;
 970
 971         make_rose->neighbour->use++;
 972
 973         if (rose_sk(sk)->defer) {
 974                 make_rose->state = ROSE_STATE_5;
 975         } else {
 976                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
 977                 make_rose->state = ROSE_STATE_3;
 978                 rose_start_idletimer(make);
 979         }
 980
 981         make_rose->condition = 0x00;
 982         make_rose->vs        = 0;
 983         make_rose->va        = 0;
 984         make_rose->vr        = 0;
 985         make_rose->vl        = 0;
 986         sk->sk_ack_backlog++;
 987
 988         rose_insert_socket(make);
 989
 990         skb_queue_head(&sk->sk_receive_queue, skb);
 991
 992         rose_start_heartbeat(make);
 993
 994         if (!sock_flag(sk, SOCK_DEAD))
 995                 sk->sk_data_ready(sk, skb->len);
 996
 997         return 1;
 998 }
 999
1000 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1001                         struct msghdr *msg, size_t len)
1002 {
1003         struct sock *sk = sock->sk;
1004         struct rose_sock *rose = rose_sk(sk);
1005         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1006         int err;
1007         struct full_sockaddr_rose srose;
1008         struct sk_buff *skb;
1009         unsigned char *asmptr;
1010         int n, size, qbit = 0;
1011
1012         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1013                 return -EINVAL;
1014
1015         if (sock_flag(sk, SOCK_ZAPPED))
1016                 return -EADDRNOTAVAIL;
1017
1018         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1019                 send_sig(SIGPIPE, current, 0);
1020                 return -EPIPE;
1021         }
1022
1023         if (rose->neighbour == NULL || rose->device == NULL)
1024                 return -ENETUNREACH;
1025
1026         if (usrose != NULL) {
1027                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1028                         return -EINVAL;
1029                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1030                 memcpy(&srose, usrose, msg->msg_namelen);
1031                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1032                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1033                         return -EISCONN;
1034                 if (srose.srose_ndigis != rose->dest_ndigis)
1035                         return -EISCONN;
1036                 if (srose.srose_ndigis == rose->dest_ndigis) {
1037                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1038                                 if (ax25cmp(&rose->dest_digis[n],
1039                                             &srose.srose_digis[n]))
1040                                         return -EISCONN;
1041                 }
1042                 if (srose.srose_family != AF_ROSE)
1043                         return -EINVAL;
1044         } else {
1045                 if (sk->sk_state != TCP_ESTABLISHED)
1046                         return -ENOTCONN;
1047
1048                 srose.srose_family = AF_ROSE;
1049                 srose.srose_addr   = rose->dest_addr;
1050                 srose.srose_call   = rose->dest_call;
1051                 srose.srose_ndigis = rose->dest_ndigis;
1052                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1053                         srose.srose_digis[n] = rose->dest_digis[n];
1054         }
1055
1056         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1057
1058         /* Build a packet */
1059         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1060         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1061
1062         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1063                 return err;
1064
1065         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1066
1067         /*
1068          *      Put the data on the end
1069          */
1070         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1071
1072         asmptr = skb->h.raw = skb_put(skb, len);
1073
1074         err = memcpy_fromiovec(asmptr, msg->msg_iov, len);
1075         if (err) {
1076                 kfree_skb(skb);
1077                 return err;
1078         }
1079
1080         /*
1081          *      If the Q BIT Include socket option is in force, the first
1082          *      byte of the user data is the logical value of the Q Bit.
1083          */
1084         if (rose->qbitincl) {
1085                 qbit = skb->data[0];
1086                 skb_pull(skb, 1);
1087         }
1088
1089         /*
1090          *      Push down the ROSE header
1091          */
1092         asmptr = skb_push(skb, ROSE_MIN_LEN);
1093
1094         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1095
1096         /* Build a ROSE Network header */
1097         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1098         asmptr[1] = (rose->lci >> 0) & 0xFF;
1099         asmptr[2] = ROSE_DATA;
1100
1101         if (qbit)
1102                 asmptr[0] |= ROSE_Q_BIT;
1103
1104         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1105
1106         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1107
1108         if (sk->sk_state != TCP_ESTABLISHED) {
1109                 kfree_skb(skb);
1110                 return -ENOTCONN;
1111         }
1112
1113 #ifdef M_BIT
1114 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1115         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1116                 unsigned char header[ROSE_MIN_LEN];
1117                 struct sk_buff *skbn;
1118                 int frontlen;
1119                 int lg;
1120
1121                 /* Save a copy of the Header */
1122                 memcpy(header, skb->data, ROSE_MIN_LEN);
1123                 skb_pull(skb, ROSE_MIN_LEN);
1124
1125                 frontlen = skb_headroom(skb);
1126
1127                 while (skb->len > 0) {
1128                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1129                                 kfree_skb(skb);
1130                                 return err;
1131                         }
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);
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, size_t size, int flags)
1172 {
1173         struct sock *sk = sock->sk;
1174         struct rose_sock *rose = rose_sk(sk);
1175         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1176         size_t copied;
1177         unsigned char *asmptr;
1178         struct sk_buff *skb;
1179         int n, er, qbit;
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         struct rose_sock *rose = rose_sk(sk);
1240         void __user *argp = (void __user *)arg;
1241
1242         switch (cmd) {
1243         case TIOCOUTQ: {
1244                 long amount;
1245                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1246                 if (amount < 0)
1247                         amount = 0;
1248                 return put_user(amount, (unsigned int __user *) argp);
1249         }
1250
1251         case TIOCINQ: {
1252                 struct sk_buff *skb;
1253                 long amount = 0L;
1254                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1255                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1256                         amount = skb->len;
1257                 return put_user(amount, (unsigned int __user *) argp);
1258         }
1259
1260         case SIOCGSTAMP:
1261                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1262
1263         case SIOCGIFADDR:
1264         case SIOCSIFADDR:
1265         case SIOCGIFDSTADDR:
1266         case SIOCSIFDSTADDR:
1267         case SIOCGIFBRDADDR:
1268         case SIOCSIFBRDADDR:
1269         case SIOCGIFNETMASK:
1270         case SIOCSIFNETMASK:
1271         case SIOCGIFMETRIC:
1272         case SIOCSIFMETRIC:
1273                 return -EINVAL;
1274
1275         case SIOCADDRT:
1276         case SIOCDELRT:
1277         case SIOCRSCLRRT:
1278                 if (!capable(CAP_NET_ADMIN))
1279                         return -EPERM;
1280                 return rose_rt_ioctl(cmd, argp);
1281
1282         case SIOCRSGCAUSE: {
1283                 struct rose_cause_struct rose_cause;
1284                 rose_cause.cause      = rose->cause;
1285                 rose_cause.diagnostic = rose->diagnostic;
1286                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1287         }
1288
1289         case SIOCRSSCAUSE: {
1290                 struct rose_cause_struct rose_cause;
1291                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1292                         return -EFAULT;
1293                 rose->cause      = rose_cause.cause;
1294                 rose->diagnostic = rose_cause.diagnostic;
1295                 return 0;
1296         }
1297
1298         case SIOCRSSL2CALL:
1299                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1300                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1301                         ax25_listen_release(&rose_callsign, NULL);
1302                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1303                         return -EFAULT;
1304                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1305                         ax25_listen_register(&rose_callsign, NULL);
1306                 return 0;
1307
1308         case SIOCRSGL2CALL:
1309                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1310
1311         case SIOCRSACCEPT:
1312                 if (rose->state == ROSE_STATE_5) {
1313                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1314                         rose_start_idletimer(sk);
1315                         rose->condition = 0x00;
1316                         rose->vs        = 0;
1317                         rose->va        = 0;
1318                         rose->vr        = 0;
1319                         rose->vl        = 0;
1320                         rose->state     = ROSE_STATE_3;
1321                 }
1322                 return 0;
1323
1324         default:
1325                 return -ENOIOCTLCMD;
1326         }
1327
1328         return 0;
1329 }
1330
1331 #ifdef CONFIG_PROC_FS
1332 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1333 {
1334         int i;
1335         struct sock *s;
1336         struct hlist_node *node;
1337
1338         spin_lock_bh(&rose_list_lock);
1339         if (*pos == 0)
1340                 return SEQ_START_TOKEN;
1341
1342         i = 1;
1343         sk_for_each(s, node, &rose_list) {
1344                 if (i == *pos)
1345                         return s;
1346                 ++i;
1347         }
1348         return NULL;
1349 }
1350
1351 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1352 {
1353         ++*pos;
1354
1355         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1356                 : sk_next((struct sock *)v);
1357 }
1358
1359 static void rose_info_stop(struct seq_file *seq, void *v)
1360 {
1361         spin_unlock_bh(&rose_list_lock);
1362 }
1363
1364 static int rose_info_show(struct seq_file *seq, void *v)
1365 {
1366         char buf[11];
1367
1368         if (v == SEQ_START_TOKEN)
1369                 seq_puts(seq,
1370                          "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");
1371
1372         else {
1373                 struct sock *s = v;
1374                 struct rose_sock *rose = rose_sk(s);
1375                 const char *devname, *callsign;
1376                 const struct net_device *dev = rose->device;
1377
1378                 if (!dev)
1379                         devname = "???";
1380                 else
1381                         devname = dev->name;
1382
1383                 seq_printf(seq, "%-10s %-9s ",
1384                         rose2asc(&rose->dest_addr),
1385                         ax2asc(buf, &rose->dest_call));
1386
1387                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1388                         callsign = "??????-?";
1389                 else
1390                         callsign = ax2asc(buf, &rose->source_call);
1391
1392                 seq_printf(seq,
1393                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1394                         rose2asc(&rose->source_addr),
1395                         callsign,
1396                         devname,
1397                         rose->lci & 0x0FFF,
1398                         (rose->neighbour) ? rose->neighbour->number : 0,
1399                         rose->state,
1400                         rose->vs,
1401                         rose->vr,
1402                         rose->va,
1403                         ax25_display_timer(&rose->timer) / HZ,
1404                         rose->t1 / HZ,
1405                         rose->t2 / HZ,
1406                         rose->t3 / HZ,
1407                         rose->hb / HZ,
1408                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1409                         rose->idle / (60 * HZ),
1410                         atomic_read(&s->sk_wmem_alloc),
1411                         atomic_read(&s->sk_rmem_alloc),
1412                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1413         }
1414
1415         return 0;
1416 }
1417
1418 static struct seq_operations rose_info_seqops = {
1419         .start = rose_info_start,
1420         .next = rose_info_next,
1421         .stop = rose_info_stop,
1422         .show = rose_info_show,
1423 };
1424
1425 static int rose_info_open(struct inode *inode, struct file *file)
1426 {
1427         return seq_open(file, &rose_info_seqops);
1428 }
1429
1430 static struct file_operations rose_info_fops = {
1431         .owner = THIS_MODULE,
1432         .open = rose_info_open,
1433         .read = seq_read,
1434         .llseek = seq_lseek,
1435         .release = seq_release,
1436 };
1437 #endif  /* CONFIG_PROC_FS */
1438
1439 static struct net_proto_family rose_family_ops = {
1440         .family         =       PF_ROSE,
1441         .create         =       rose_create,
1442         .owner          =       THIS_MODULE,
1443 };
1444
1445 static struct proto_ops rose_proto_ops = {
1446         .family         =       PF_ROSE,
1447         .owner          =       THIS_MODULE,
1448         .release        =       rose_release,
1449         .bind           =       rose_bind,
1450         .connect        =       rose_connect,
1451         .socketpair     =       sock_no_socketpair,
1452         .accept         =       rose_accept,
1453         .getname        =       rose_getname,
1454         .poll           =       datagram_poll,
1455         .ioctl          =       rose_ioctl,
1456         .listen         =       rose_listen,
1457         .shutdown       =       sock_no_shutdown,
1458         .setsockopt     =       rose_setsockopt,
1459         .getsockopt     =       rose_getsockopt,
1460         .sendmsg        =       rose_sendmsg,
1461         .recvmsg        =       rose_recvmsg,
1462         .mmap           =       sock_no_mmap,
1463         .sendpage       =       sock_no_sendpage,
1464 };
1465
1466 static struct notifier_block rose_dev_notifier = {
1467         .notifier_call  =       rose_device_event,
1468 };
1469
1470 static struct net_device **dev_rose;
1471
1472 static int __init rose_proto_init(void)
1473 {
1474         int i;
1475         int rc;
1476
1477         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1478                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1479                 rc = -EINVAL;
1480                 goto out;
1481         }
1482
1483         rc = proto_register(&rose_proto, 0);
1484         if (rc != 0)
1485                 goto out;
1486
1487         rose_callsign = null_ax25_address;
1488
1489         dev_rose = kmalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1490         if (dev_rose == NULL) {
1491                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1492                 rc = -ENOMEM;
1493                 goto out_proto_unregister;
1494         }
1495
1496         memset(dev_rose, 0x00, rose_ndevs * sizeof(struct net_device*));
1497         for (i = 0; i < rose_ndevs; i++) {
1498                 struct net_device *dev;
1499                 char name[IFNAMSIZ];
1500
1501                 sprintf(name, "rose%d", i);
1502                 dev = alloc_netdev(sizeof(struct net_device_stats),
1503                                    name, rose_setup);
1504                 if (!dev) {
1505                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1506                         rc = -ENOMEM;
1507                         goto fail;
1508                 }
1509                 rc = register_netdev(dev);
1510                 if (rc) {
1511                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1512                         free_netdev(dev);
1513                         goto fail;
1514                 }
1515                 dev_rose[i] = dev;
1516         }
1517
1518         sock_register(&rose_family_ops);
1519         register_netdevice_notifier(&rose_dev_notifier);
1520
1521         ax25_protocol_register(AX25_P_ROSE, rose_route_frame);
1522         ax25_linkfail_register(rose_link_failed);
1523
1524 #ifdef CONFIG_SYSCTL
1525         rose_register_sysctl();
1526 #endif
1527         rose_loopback_init();
1528
1529         rose_add_loopback_neigh();
1530
1531         proc_net_fops_create("rose", S_IRUGO, &rose_info_fops);
1532         proc_net_fops_create("rose_neigh", S_IRUGO, &rose_neigh_fops);
1533         proc_net_fops_create("rose_nodes", S_IRUGO, &rose_nodes_fops);
1534         proc_net_fops_create("rose_routes", S_IRUGO, &rose_routes_fops);
1535 out:
1536         return rc;
1537 fail:
1538         while (--i >= 0) {
1539                 unregister_netdev(dev_rose[i]);
1540                 free_netdev(dev_rose[i]);
1541         }
1542         kfree(dev_rose);
1543 out_proto_unregister:
1544         proto_unregister(&rose_proto);
1545         goto out;
1546 }
1547 module_init(rose_proto_init);
1548
1549 module_param(rose_ndevs, int, 0);
1550 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1551
1552 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1553 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1554 MODULE_LICENSE("GPL");
1555 MODULE_ALIAS_NETPROTO(PF_ROSE);
1556
1557 static void __exit rose_exit(void)
1558 {
1559         int i;
1560
1561         proc_net_remove("rose");
1562         proc_net_remove("rose_neigh");
1563         proc_net_remove("rose_nodes");
1564         proc_net_remove("rose_routes");
1565         rose_loopback_clear();
1566
1567         rose_rt_free();
1568
1569         ax25_protocol_release(AX25_P_ROSE);
1570         ax25_linkfail_release(rose_link_failed);
1571
1572         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1573                 ax25_listen_release(&rose_callsign, NULL);
1574
1575 #ifdef CONFIG_SYSCTL
1576         rose_unregister_sysctl();
1577 #endif
1578         unregister_netdevice_notifier(&rose_dev_notifier);
1579
1580         sock_unregister(PF_ROSE);
1581
1582         for (i = 0; i < rose_ndevs; i++) {
1583                 struct net_device *dev = dev_rose[i];
1584
1585                 if (dev) {
1586                         unregister_netdev(dev);
1587                         free_netdev(dev);
1588                 }
1589         }
1590
1591         kfree(dev_rose);
1592         proto_unregister(&rose_proto);
1593 }
1594
1595 module_exit(rose_exit);