net/rose/af_rose.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   8  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   9  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
  10  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
  11  */
  12
  13 #include <linux/capability.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/types.h>
  19 #include <linux/socket.h>
  20 #include <linux/in.h>
  21 #include <linux/slab.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched/signal.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/net_namespace.h>
  31 #include <net/ax25.h>
  32 #include <linux/inet.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/if_arp.h>
  35 #include <linux/skbuff.h>
  36 #include <net/sock.h>
  37 #include <linux/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 const struct proto_ops rose_proto_ops;
  67
  68 ax25_address rose_callsign;
  69
  70 /*
  71  * ROSE network devices are virtual network devices encapsulating ROSE
  72  * frames into AX.25 which will be sent through an AX.25 device, so form a
  73  * special "super class" of normal net devices; split their locks off into a
  74  * separate class since they always nest.
  75  */
  76 static struct lock_class_key rose_netdev_xmit_lock_key;
  77 static struct lock_class_key rose_netdev_addr_lock_key;
  78
  79 static void rose_set_lockdep_one(struct net_device *dev,
  80                                  struct netdev_queue *txq,
  81                                  void *_unused)
  82 {
  83         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
  84 }
  85
  86 static void rose_set_lockdep_key(struct net_device *dev)
  87 {
  88         lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
  89         netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
  90 }
  91
  92 /*
  93  *      Convert a ROSE address into text.
  94  */
  95 char *rose2asc(char *buf, const rose_address *addr)
  96 {
  97         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  98             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  99             addr->rose_addr[4] == 0x00) {
 100                 strcpy(buf, "*");
 101         } else {
 102                 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 103                                                 addr->rose_addr[1] & 0xFF,
 104                                                 addr->rose_addr[2] & 0xFF,
 105                                                 addr->rose_addr[3] & 0xFF,
 106                                                 addr->rose_addr[4] & 0xFF);
 107         }
 108
 109         return buf;
 110 }
 111
 112 /*
 113  *      Compare two ROSE addresses, 0 == equal.
 114  */
 115 int rosecmp(rose_address *addr1, rose_address *addr2)
 116 {
 117         int i;
 118
 119         for (i = 0; i < 5; i++)
 120                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 121                         return 1;
 122
 123         return 0;
 124 }
 125
 126 /*
 127  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 128  */
 129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 130 {
 131         unsigned int i, j;
 132
 133         if (mask > 10)
 134                 return 1;
 135
 136         for (i = 0; i < mask; i++) {
 137                 j = i / 2;
 138
 139                 if ((i % 2) != 0) {
 140                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 141                                 return 1;
 142                 } else {
 143                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 144                                 return 1;
 145                 }
 146         }
 147
 148         return 0;
 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
 169         spin_lock_bh(&rose_list_lock);
 170         sk_for_each(s, &rose_list) {
 171                 struct rose_sock *rose = rose_sk(s);
 172
 173                 if (rose->neighbour == neigh) {
 174                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 175                         rose->neighbour->use--;
 176                         rose->neighbour = NULL;
 177                 }
 178         }
 179         spin_unlock_bh(&rose_list_lock);
 180 }
 181
 182 /*
 183  *      Kill all bound sockets on a dropped device.
 184  */
 185 static void rose_kill_by_device(struct net_device *dev)
 186 {
 187         struct sock *s;
 188
 189         spin_lock_bh(&rose_list_lock);
 190         sk_for_each(s, &rose_list) {
 191                 struct rose_sock *rose = rose_sk(s);
 192
 193                 if (rose->device == dev) {
 194                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 195                         if (rose->neighbour)
 196                                 rose->neighbour->use--;
 197                         dev_put(rose->device);
 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,
 208                              unsigned long event, void *ptr)
 209 {
 210         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 211
 212         if (!net_eq(dev_net(dev), &init_net))
 213                 return NOTIFY_DONE;
 214
 215         if (event != NETDEV_DOWN)
 216                 return NOTIFY_DONE;
 217
 218         switch (dev->type) {
 219         case ARPHRD_ROSE:
 220                 rose_kill_by_device(dev);
 221                 break;
 222         case ARPHRD_AX25:
 223                 rose_link_device_down(dev);
 224                 rose_rt_device_down(dev);
 225                 break;
 226         }
 227
 228         return NOTIFY_DONE;
 229 }
 230
 231 /*
 232  *      Add a socket to the bound sockets list.
 233  */
 234 static void rose_insert_socket(struct sock *sk)
 235 {
 236
 237         spin_lock_bh(&rose_list_lock);
 238         sk_add_node(sk, &rose_list);
 239         spin_unlock_bh(&rose_list_lock);
 240 }
 241
 242 /*
 243  *      Find a socket that wants to accept the Call Request we just
 244  *      received.
 245  */
 246 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 247 {
 248         struct sock *s;
 249
 250         spin_lock_bh(&rose_list_lock);
 251         sk_for_each(s, &rose_list) {
 252                 struct rose_sock *rose = rose_sk(s);
 253
 254                 if (!rosecmp(&rose->source_addr, addr) &&
 255                     !ax25cmp(&rose->source_call, call) &&
 256                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 257                         goto found;
 258         }
 259
 260         sk_for_each(s, &rose_list) {
 261                 struct rose_sock *rose = rose_sk(s);
 262
 263                 if (!rosecmp(&rose->source_addr, addr) &&
 264                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 265                     s->sk_state == TCP_LISTEN)
 266                         goto found;
 267         }
 268         s = NULL;
 269 found:
 270         spin_unlock_bh(&rose_list_lock);
 271         return s;
 272 }
 273
 274 /*
 275  *      Find a connected ROSE socket given my LCI and device.
 276  */
 277 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 278 {
 279         struct sock *s;
 280
 281         spin_lock_bh(&rose_list_lock);
 282         sk_for_each(s, &rose_list) {
 283                 struct rose_sock *rose = rose_sk(s);
 284
 285                 if (rose->lci == lci && rose->neighbour == neigh)
 286                         goto found;
 287         }
 288         s = NULL;
 289 found:
 290         spin_unlock_bh(&rose_list_lock);
 291         return s;
 292 }
 293
 294 /*
 295  *      Find a unique LCI for a given device.
 296  */
 297 unsigned int rose_new_lci(struct rose_neigh *neigh)
 298 {
 299         int lci;
 300
 301         if (neigh->dce_mode) {
 302                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 303                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 304                                 return lci;
 305         } else {
 306                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 307                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 308                                 return lci;
 309         }
 310
 311         return 0;
 312 }
 313
 314 /*
 315  *      Deferred destroy.
 316  */
 317 void rose_destroy_socket(struct sock *);
 318
 319 /*
 320  *      Handler for deferred kills.
 321  */
 322 static void rose_destroy_timer(struct timer_list *t)
 323 {
 324         struct sock *sk = from_timer(sk, t, sk_timer);
 325
 326         rose_destroy_socket(sk);
 327 }
 328
 329 /*
 330  *      This is called from user mode and the timers. Thus it protects itself
 331  *      against interrupt users but doesn't worry about being called during
 332  *      work.  Once it is removed from the queue no interrupt or bottom half
 333  *      will touch it and we are (fairly 8-) ) safe.
 334  */
 335 void rose_destroy_socket(struct sock *sk)
 336 {
 337         struct sk_buff *skb;
 338
 339         rose_remove_socket(sk);
 340         rose_stop_heartbeat(sk);
 341         rose_stop_idletimer(sk);
 342         rose_stop_timer(sk);
 343
 344         rose_clear_queues(sk);          /* Flush the queues */
 345
 346         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 347                 if (skb->sk != sk) {    /* A pending connection */
 348                         /* Queue the unaccepted socket for death */
 349                         sock_set_flag(skb->sk, SOCK_DEAD);
 350                         rose_start_heartbeat(skb->sk);
 351                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 352                 }
 353
 354                 kfree_skb(skb);
 355         }
 356
 357         if (sk_has_allocations(sk)) {
 358                 /* Defer: outstanding buffers */
 359                 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
 360                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 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, unsigned int optlen)
 373 {
 374         struct sock *sk = sock->sk;
 375         struct rose_sock *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         struct rose_sock *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         lock_sock(sk);
 494         if (sock->state != SS_UNCONNECTED) {
 495                 release_sock(sk);
 496                 return -EINVAL;
 497         }
 498
 499         if (sk->sk_state != TCP_LISTEN) {
 500                 struct rose_sock *rose = rose_sk(sk);
 501
 502                 rose->dest_ndigis = 0;
 503                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 504                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 505                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 506                 sk->sk_max_ack_backlog = backlog;
 507                 sk->sk_state           = TCP_LISTEN;
 508                 release_sock(sk);
 509                 return 0;
 510         }
 511         release_sock(sk);
 512
 513         return -EOPNOTSUPP;
 514 }
 515
 516 static struct proto rose_proto = {
 517         .name     = "ROSE",
 518         .owner    = THIS_MODULE,
 519         .obj_size = sizeof(struct rose_sock),
 520 };
 521
 522 static int rose_create(struct net *net, struct socket *sock, int protocol,
 523                        int kern)
 524 {
 525         struct sock *sk;
 526         struct rose_sock *rose;
 527
 528         if (!net_eq(net, &init_net))
 529                 return -EAFNOSUPPORT;
 530
 531         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 532                 return -ESOCKTNOSUPPORT;
 533
 534         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
 535         if (sk == NULL)
 536                 return -ENOMEM;
 537
 538         rose = rose_sk(sk);
 539
 540         sock_init_data(sock, sk);
 541
 542         skb_queue_head_init(&rose->ack_queue);
 543 #ifdef M_BIT
 544         skb_queue_head_init(&rose->frag_queue);
 545         rose->fraglen    = 0;
 546 #endif
 547
 548         sock->ops    = &rose_proto_ops;
 549         sk->sk_protocol = protocol;
 550
 551         timer_setup(&rose->timer, NULL, 0);
 552         timer_setup(&rose->idletimer, NULL, 0);
 553
 554         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 555         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 556         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 557         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 558         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 559
 560         rose->state = ROSE_STATE_0;
 561
 562         return 0;
 563 }
 564
 565 static struct sock *rose_make_new(struct sock *osk)
 566 {
 567         struct sock *sk;
 568         struct rose_sock *rose, *orose;
 569
 570         if (osk->sk_type != SOCK_SEQPACKET)
 571                 return NULL;
 572
 573         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
 574         if (sk == NULL)
 575                 return NULL;
 576
 577         rose = rose_sk(sk);
 578
 579         sock_init_data(NULL, sk);
 580
 581         skb_queue_head_init(&rose->ack_queue);
 582 #ifdef M_BIT
 583         skb_queue_head_init(&rose->frag_queue);
 584         rose->fraglen  = 0;
 585 #endif
 586
 587         sk->sk_type     = osk->sk_type;
 588         sk->sk_priority = osk->sk_priority;
 589         sk->sk_protocol = osk->sk_protocol;
 590         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 591         sk->sk_sndbuf   = osk->sk_sndbuf;
 592         sk->sk_state    = TCP_ESTABLISHED;
 593         sock_copy_flags(sk, osk);
 594
 595         timer_setup(&rose->timer, NULL, 0);
 596         timer_setup(&rose->idletimer, NULL, 0);
 597
 598         orose           = rose_sk(osk);
 599         rose->t1        = orose->t1;
 600         rose->t2        = orose->t2;
 601         rose->t3        = orose->t3;
 602         rose->hb        = orose->hb;
 603         rose->idle      = orose->idle;
 604         rose->defer     = orose->defer;
 605         rose->device    = orose->device;
 606         if (rose->device)
 607                 dev_hold(rose->device);
 608         rose->qbitincl  = orose->qbitincl;
 609
 610         return sk;
 611 }
 612
 613 static int rose_release(struct socket *sock)
 614 {
 615         struct sock *sk = sock->sk;
 616         struct rose_sock *rose;
 617
 618         if (sk == NULL) return 0;
 619
 620         sock_hold(sk);
 621         sock_orphan(sk);
 622         lock_sock(sk);
 623         rose = rose_sk(sk);
 624
 625         switch (rose->state) {
 626         case ROSE_STATE_0:
 627                 release_sock(sk);
 628                 rose_disconnect(sk, 0, -1, -1);
 629                 lock_sock(sk);
 630                 rose_destroy_socket(sk);
 631                 break;
 632
 633         case ROSE_STATE_2:
 634                 rose->neighbour->use--;
 635                 release_sock(sk);
 636                 rose_disconnect(sk, 0, -1, -1);
 637                 lock_sock(sk);
 638                 rose_destroy_socket(sk);
 639                 break;
 640
 641         case ROSE_STATE_1:
 642         case ROSE_STATE_3:
 643         case ROSE_STATE_4:
 644         case ROSE_STATE_5:
 645                 rose_clear_queues(sk);
 646                 rose_stop_idletimer(sk);
 647                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 648                 rose_start_t3timer(sk);
 649                 rose->state  = ROSE_STATE_2;
 650                 sk->sk_state    = TCP_CLOSE;
 651                 sk->sk_shutdown |= SEND_SHUTDOWN;
 652                 sk->sk_state_change(sk);
 653                 sock_set_flag(sk, SOCK_DEAD);
 654                 sock_set_flag(sk, SOCK_DESTROY);
 655                 break;
 656
 657         default:
 658                 break;
 659         }
 660
 661         dev_put(rose->device);
 662         sock->sk = NULL;
 663         release_sock(sk);
 664         sock_put(sk);
 665
 666         return 0;
 667 }
 668
 669 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 670 {
 671         struct sock *sk = sock->sk;
 672         struct rose_sock *rose = rose_sk(sk);
 673         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 674         struct net_device *dev;
 675         ax25_address *source;
 676         ax25_uid_assoc *user;
 677         int n;
 678
 679         if (!sock_flag(sk, SOCK_ZAPPED))
 680                 return -EINVAL;
 681
 682         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 683                 return -EINVAL;
 684
 685         if (addr->srose_family != AF_ROSE)
 686                 return -EINVAL;
 687
 688         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 689                 return -EINVAL;
 690
 691         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 692                 return -EINVAL;
 693
 694         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
 695                 return -EADDRNOTAVAIL;
 696
 697         source = &addr->srose_call;
 698
 699         user = ax25_findbyuid(current_euid());
 700         if (user) {
 701                 rose->source_call = user->call;
 702                 ax25_uid_put(user);
 703         } else {
 704                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 705                         return -EACCES;
 706                 rose->source_call   = *source;
 707         }
 708
 709         rose->source_addr   = addr->srose_addr;
 710         rose->device        = dev;
 711         rose->source_ndigis = addr->srose_ndigis;
 712
 713         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 714                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 715                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 716                         rose->source_digis[n] = full_addr->srose_digis[n];
 717         } else {
 718                 if (rose->source_ndigis == 1) {
 719                         rose->source_digis[0] = addr->srose_digi;
 720                 }
 721         }
 722
 723         rose_insert_socket(sk);
 724
 725         sock_reset_flag(sk, SOCK_ZAPPED);
 726
 727         return 0;
 728 }
 729
 730 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 731 {
 732         struct sock *sk = sock->sk;
 733         struct rose_sock *rose = rose_sk(sk);
 734         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 735         unsigned char cause, diagnostic;
 736         ax25_uid_assoc *user;
 737         int n, err = 0;
 738
 739         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 740                 return -EINVAL;
 741
 742         if (addr->srose_family != AF_ROSE)
 743                 return -EINVAL;
 744
 745         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 746                 return -EINVAL;
 747
 748         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 749                 return -EINVAL;
 750
 751         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 752         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 753                 return -EINVAL;
 754
 755         lock_sock(sk);
 756
 757         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 758                 /* Connect completed during a ERESTARTSYS event */
 759                 sock->state = SS_CONNECTED;
 760                 goto out_release;
 761         }
 762
 763         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 764                 sock->state = SS_UNCONNECTED;
 765                 err = -ECONNREFUSED;
 766                 goto out_release;
 767         }
 768
 769         if (sk->sk_state == TCP_ESTABLISHED) {
 770                 /* No reconnect on a seqpacket socket */
 771                 err = -EISCONN;
 772                 goto out_release;
 773         }
 774
 775         sk->sk_state   = TCP_CLOSE;
 776         sock->state = SS_UNCONNECTED;
 777
 778         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 779                                          &diagnostic, 0);
 780         if (!rose->neighbour) {
 781                 err = -ENETUNREACH;
 782                 goto out_release;
 783         }
 784
 785         rose->lci = rose_new_lci(rose->neighbour);
 786         if (!rose->lci) {
 787                 err = -ENETUNREACH;
 788                 goto out_release;
 789         }
 790
 791         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 792                 struct net_device *dev;
 793
 794                 sock_reset_flag(sk, SOCK_ZAPPED);
 795
 796                 dev = rose_dev_first();
 797                 if (!dev) {
 798                         err = -ENETUNREACH;
 799                         goto out_release;
 800                 }
 801
 802                 user = ax25_findbyuid(current_euid());
 803                 if (!user) {
 804                         err = -EINVAL;
 805                         dev_put(dev);
 806                         goto out_release;
 807                 }
 808
 809                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 810                 rose->source_call = user->call;
 811                 rose->device      = dev;
 812                 ax25_uid_put(user);
 813
 814                 rose_insert_socket(sk);         /* Finish the bind */
 815         }
 816         rose->dest_addr   = addr->srose_addr;
 817         rose->dest_call   = addr->srose_call;
 818         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 819         rose->dest_ndigis = addr->srose_ndigis;
 820
 821         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 822                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 823                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 824                         rose->dest_digis[n] = full_addr->srose_digis[n];
 825         } else {
 826                 if (rose->dest_ndigis == 1) {
 827                         rose->dest_digis[0] = addr->srose_digi;
 828                 }
 829         }
 830
 831         /* Move to connecting socket, start sending Connect Requests */
 832         sock->state   = SS_CONNECTING;
 833         sk->sk_state     = TCP_SYN_SENT;
 834
 835         rose->state = ROSE_STATE_1;
 836
 837         rose->neighbour->use++;
 838
 839         rose_write_internal(sk, ROSE_CALL_REQUEST);
 840         rose_start_heartbeat(sk);
 841         rose_start_t1timer(sk);
 842
 843         /* Now the loop */
 844         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 845                 err = -EINPROGRESS;
 846                 goto out_release;
 847         }
 848
 849         /*
 850          * A Connect Ack with Choke or timeout or failed routing will go to
 851          * closed.
 852          */
 853         if (sk->sk_state == TCP_SYN_SENT) {
 854                 DEFINE_WAIT(wait);
 855
 856                 for (;;) {
 857                         prepare_to_wait(sk_sleep(sk), &wait,
 858                                         TASK_INTERRUPTIBLE);
 859                         if (sk->sk_state != TCP_SYN_SENT)
 860                                 break;
 861                         if (!signal_pending(current)) {
 862                                 release_sock(sk);
 863                                 schedule();
 864                                 lock_sock(sk);
 865                                 continue;
 866                         }
 867                         err = -ERESTARTSYS;
 868                         break;
 869                 }
 870                 finish_wait(sk_sleep(sk), &wait);
 871
 872                 if (err)
 873                         goto out_release;
 874         }
 875
 876         if (sk->sk_state != TCP_ESTABLISHED) {
 877                 sock->state = SS_UNCONNECTED;
 878                 err = sock_error(sk);   /* Always set at this point */
 879                 goto out_release;
 880         }
 881
 882         sock->state = SS_CONNECTED;
 883
 884 out_release:
 885         release_sock(sk);
 886
 887         return err;
 888 }
 889
 890 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
 891                        bool kern)
 892 {
 893         struct sk_buff *skb;
 894         struct sock *newsk;
 895         DEFINE_WAIT(wait);
 896         struct sock *sk;
 897         int err = 0;
 898
 899         if ((sk = sock->sk) == NULL)
 900                 return -EINVAL;
 901
 902         lock_sock(sk);
 903         if (sk->sk_type != SOCK_SEQPACKET) {
 904                 err = -EOPNOTSUPP;
 905                 goto out_release;
 906         }
 907
 908         if (sk->sk_state != TCP_LISTEN) {
 909                 err = -EINVAL;
 910                 goto out_release;
 911         }
 912
 913         /*
 914          *      The write queue this time is holding sockets ready to use
 915          *      hooked into the SABM we saved
 916          */
 917         for (;;) {
 918                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 919
 920                 skb = skb_dequeue(&sk->sk_receive_queue);
 921                 if (skb)
 922                         break;
 923
 924                 if (flags & O_NONBLOCK) {
 925                         err = -EWOULDBLOCK;
 926                         break;
 927                 }
 928                 if (!signal_pending(current)) {
 929                         release_sock(sk);
 930                         schedule();
 931                         lock_sock(sk);
 932                         continue;
 933                 }
 934                 err = -ERESTARTSYS;
 935                 break;
 936         }
 937         finish_wait(sk_sleep(sk), &wait);
 938         if (err)
 939                 goto out_release;
 940
 941         newsk = skb->sk;
 942         sock_graft(newsk, newsock);
 943
 944         /* Now attach up the new socket */
 945         skb->sk = NULL;
 946         kfree_skb(skb);
 947         sk->sk_ack_backlog--;
 948
 949 out_release:
 950         release_sock(sk);
 951
 952         return err;
 953 }
 954
 955 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 956         int peer)
 957 {
 958         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 959         struct sock *sk = sock->sk;
 960         struct rose_sock *rose = rose_sk(sk);
 961         int n;
 962
 963         memset(srose, 0, sizeof(*srose));
 964         if (peer != 0) {
 965                 if (sk->sk_state != TCP_ESTABLISHED)
 966                         return -ENOTCONN;
 967                 srose->srose_family = AF_ROSE;
 968                 srose->srose_addr   = rose->dest_addr;
 969                 srose->srose_call   = rose->dest_call;
 970                 srose->srose_ndigis = rose->dest_ndigis;
 971                 for (n = 0; n < rose->dest_ndigis; n++)
 972                         srose->srose_digis[n] = rose->dest_digis[n];
 973         } else {
 974                 srose->srose_family = AF_ROSE;
 975                 srose->srose_addr   = rose->source_addr;
 976                 srose->srose_call   = rose->source_call;
 977                 srose->srose_ndigis = rose->source_ndigis;
 978                 for (n = 0; n < rose->source_ndigis; n++)
 979                         srose->srose_digis[n] = rose->source_digis[n];
 980         }
 981
 982         return sizeof(struct full_sockaddr_rose);
 983 }
 984
 985 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 986 {
 987         struct sock *sk;
 988         struct sock *make;
 989         struct rose_sock *make_rose;
 990         struct rose_facilities_struct facilities;
 991         int n;
 992
 993         skb->sk = NULL;         /* Initially we don't know who it's for */
 994
 995         /*
 996          *      skb->data points to the rose frame start
 997          */
 998         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 999
1000         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1001                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1002                                    &facilities)) {
1003                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1004                 return 0;
1005         }
1006
1007         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1008
1009         /*
1010          * We can't accept the Call Request.
1011          */
1012         if (sk == NULL || sk_acceptq_is_full(sk) ||
1013             (make = rose_make_new(sk)) == NULL) {
1014                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1015                 return 0;
1016         }
1017
1018         skb->sk     = make;
1019         make->sk_state = TCP_ESTABLISHED;
1020         make_rose = rose_sk(make);
1021
1022         make_rose->lci           = lci;
1023         make_rose->dest_addr     = facilities.dest_addr;
1024         make_rose->dest_call     = facilities.dest_call;
1025         make_rose->dest_ndigis   = facilities.dest_ndigis;
1026         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1027                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1028         make_rose->source_addr   = facilities.source_addr;
1029         make_rose->source_call   = facilities.source_call;
1030         make_rose->source_ndigis = facilities.source_ndigis;
1031         for (n = 0 ; n < facilities.source_ndigis ; n++)
1032                 make_rose->source_digis[n] = facilities.source_digis[n];
1033         make_rose->neighbour     = neigh;
1034         make_rose->device        = dev;
1035         make_rose->facilities    = facilities;
1036
1037         make_rose->neighbour->use++;
1038
1039         if (rose_sk(sk)->defer) {
1040                 make_rose->state = ROSE_STATE_5;
1041         } else {
1042                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1043                 make_rose->state = ROSE_STATE_3;
1044                 rose_start_idletimer(make);
1045         }
1046
1047         make_rose->condition = 0x00;
1048         make_rose->vs        = 0;
1049         make_rose->va        = 0;
1050         make_rose->vr        = 0;
1051         make_rose->vl        = 0;
1052         sk->sk_ack_backlog++;
1053
1054         rose_insert_socket(make);
1055
1056         skb_queue_head(&sk->sk_receive_queue, skb);
1057
1058         rose_start_heartbeat(make);
1059
1060         if (!sock_flag(sk, SOCK_DEAD))
1061                 sk->sk_data_ready(sk);
1062
1063         return 1;
1064 }
1065
1066 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1067 {
1068         struct sock *sk = sock->sk;
1069         struct rose_sock *rose = rose_sk(sk);
1070         DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1071         int err;
1072         struct full_sockaddr_rose srose;
1073         struct sk_buff *skb;
1074         unsigned char *asmptr;
1075         int n, size, qbit = 0;
1076
1077         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1078                 return -EINVAL;
1079
1080         if (sock_flag(sk, SOCK_ZAPPED))
1081                 return -EADDRNOTAVAIL;
1082
1083         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1084                 send_sig(SIGPIPE, current, 0);
1085                 return -EPIPE;
1086         }
1087
1088         if (rose->neighbour == NULL || rose->device == NULL)
1089                 return -ENETUNREACH;
1090
1091         if (usrose != NULL) {
1092                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1093                         return -EINVAL;
1094                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1095                 memcpy(&srose, usrose, msg->msg_namelen);
1096                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1097                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1098                         return -EISCONN;
1099                 if (srose.srose_ndigis != rose->dest_ndigis)
1100                         return -EISCONN;
1101                 if (srose.srose_ndigis == rose->dest_ndigis) {
1102                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1103                                 if (ax25cmp(&rose->dest_digis[n],
1104                                             &srose.srose_digis[n]))
1105                                         return -EISCONN;
1106                 }
1107                 if (srose.srose_family != AF_ROSE)
1108                         return -EINVAL;
1109         } else {
1110                 if (sk->sk_state != TCP_ESTABLISHED)
1111                         return -ENOTCONN;
1112
1113                 srose.srose_family = AF_ROSE;
1114                 srose.srose_addr   = rose->dest_addr;
1115                 srose.srose_call   = rose->dest_call;
1116                 srose.srose_ndigis = rose->dest_ndigis;
1117                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1118                         srose.srose_digis[n] = rose->dest_digis[n];
1119         }
1120
1121         /* Build a packet */
1122         /* Sanity check the packet size */
1123         if (len > 65535)
1124                 return -EMSGSIZE;
1125
1126         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1127
1128         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1129                 return err;
1130
1131         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1132
1133         /*
1134          *      Put the data on the end
1135          */
1136
1137         skb_reset_transport_header(skb);
1138         skb_put(skb, len);
1139
1140         err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1141         if (err) {
1142                 kfree_skb(skb);
1143                 return err;
1144         }
1145
1146         /*
1147          *      If the Q BIT Include socket option is in force, the first
1148          *      byte of the user data is the logical value of the Q Bit.
1149          */
1150         if (rose->qbitincl) {
1151                 qbit = skb->data[0];
1152                 skb_pull(skb, 1);
1153         }
1154
1155         /*
1156          *      Push down the ROSE header
1157          */
1158         asmptr = skb_push(skb, ROSE_MIN_LEN);
1159
1160         /* Build a ROSE Network header */
1161         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1162         asmptr[1] = (rose->lci >> 0) & 0xFF;
1163         asmptr[2] = ROSE_DATA;
1164
1165         if (qbit)
1166                 asmptr[0] |= ROSE_Q_BIT;
1167
1168         if (sk->sk_state != TCP_ESTABLISHED) {
1169                 kfree_skb(skb);
1170                 return -ENOTCONN;
1171         }
1172
1173 #ifdef M_BIT
1174 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1175         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1176                 unsigned char header[ROSE_MIN_LEN];
1177                 struct sk_buff *skbn;
1178                 int frontlen;
1179                 int lg;
1180
1181                 /* Save a copy of the Header */
1182                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1183                 skb_pull(skb, ROSE_MIN_LEN);
1184
1185                 frontlen = skb_headroom(skb);
1186
1187                 while (skb->len > 0) {
1188                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1189                                 kfree_skb(skb);
1190                                 return err;
1191                         }
1192
1193                         skbn->sk   = sk;
1194                         skbn->free = 1;
1195                         skbn->arp  = 1;
1196
1197                         skb_reserve(skbn, frontlen);
1198
1199                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1200
1201                         /* Copy the user data */
1202                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1203                         skb_pull(skb, lg);
1204
1205                         /* Duplicate the Header */
1206                         skb_push(skbn, ROSE_MIN_LEN);
1207                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1208
1209                         if (skb->len > 0)
1210                                 skbn->data[2] |= M_BIT;
1211
1212                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1213                 }
1214
1215                 skb->free = 1;
1216                 kfree_skb(skb);
1217         } else {
1218                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1219         }
1220 #else
1221         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1222 #endif
1223
1224         rose_kick(sk);
1225
1226         return len;
1227 }
1228
1229
1230 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1231                         int flags)
1232 {
1233         struct sock *sk = sock->sk;
1234         struct rose_sock *rose = rose_sk(sk);
1235         size_t copied;
1236         unsigned char *asmptr;
1237         struct sk_buff *skb;
1238         int n, er, qbit;
1239
1240         /*
1241          * This works for seqpacket too. The receiver has ordered the queue for
1242          * us! We do one quick check first though
1243          */
1244         if (sk->sk_state != TCP_ESTABLISHED)
1245                 return -ENOTCONN;
1246
1247         /* Now we can treat all alike */
1248         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1249                 return er;
1250
1251         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1252
1253         skb_pull(skb, ROSE_MIN_LEN);
1254
1255         if (rose->qbitincl) {
1256                 asmptr  = skb_push(skb, 1);
1257                 *asmptr = qbit;
1258         }
1259
1260         skb_reset_transport_header(skb);
1261         copied     = skb->len;
1262
1263         if (copied > size) {
1264                 copied = size;
1265                 msg->msg_flags |= MSG_TRUNC;
1266         }
1267
1268         skb_copy_datagram_msg(skb, 0, msg, copied);
1269
1270         if (msg->msg_name) {
1271                 struct sockaddr_rose *srose;
1272                 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1273                                  msg->msg_name);
1274
1275                 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1276                 srose = msg->msg_name;
1277                 srose->srose_family = AF_ROSE;
1278                 srose->srose_addr   = rose->dest_addr;
1279                 srose->srose_call   = rose->dest_call;
1280                 srose->srose_ndigis = rose->dest_ndigis;
1281                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1282                         full_srose->srose_digis[n] = rose->dest_digis[n];
1283                 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1284         }
1285
1286         skb_free_datagram(sk, skb);
1287
1288         return copied;
1289 }
1290
1291
1292 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1293 {
1294         struct sock *sk = sock->sk;
1295         struct rose_sock *rose = rose_sk(sk);
1296         void __user *argp = (void __user *)arg;
1297
1298         switch (cmd) {
1299         case TIOCOUTQ: {
1300                 long amount;
1301
1302                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1303                 if (amount < 0)
1304                         amount = 0;
1305                 return put_user(amount, (unsigned int __user *) argp);
1306         }
1307
1308         case TIOCINQ: {
1309                 struct sk_buff *skb;
1310                 long amount = 0L;
1311                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1312                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1313                         amount = skb->len;
1314                 return put_user(amount, (unsigned int __user *) argp);
1315         }
1316
1317         case SIOCGSTAMP:
1318                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1319
1320         case SIOCGSTAMPNS:
1321                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1322
1323         case SIOCGIFADDR:
1324         case SIOCSIFADDR:
1325         case SIOCGIFDSTADDR:
1326         case SIOCSIFDSTADDR:
1327         case SIOCGIFBRDADDR:
1328         case SIOCSIFBRDADDR:
1329         case SIOCGIFNETMASK:
1330         case SIOCSIFNETMASK:
1331         case SIOCGIFMETRIC:
1332         case SIOCSIFMETRIC:
1333                 return -EINVAL;
1334
1335         case SIOCADDRT:
1336         case SIOCDELRT:
1337         case SIOCRSCLRRT:
1338                 if (!capable(CAP_NET_ADMIN))
1339                         return -EPERM;
1340                 return rose_rt_ioctl(cmd, argp);
1341
1342         case SIOCRSGCAUSE: {
1343                 struct rose_cause_struct rose_cause;
1344                 rose_cause.cause      = rose->cause;
1345                 rose_cause.diagnostic = rose->diagnostic;
1346                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1347         }
1348
1349         case SIOCRSSCAUSE: {
1350                 struct rose_cause_struct rose_cause;
1351                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1352                         return -EFAULT;
1353                 rose->cause      = rose_cause.cause;
1354                 rose->diagnostic = rose_cause.diagnostic;
1355                 return 0;
1356         }
1357
1358         case SIOCRSSL2CALL:
1359                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1360                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1361                         ax25_listen_release(&rose_callsign, NULL);
1362                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1363                         return -EFAULT;
1364                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1365                         return ax25_listen_register(&rose_callsign, NULL);
1366
1367                 return 0;
1368
1369         case SIOCRSGL2CALL:
1370                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1371
1372         case SIOCRSACCEPT:
1373                 if (rose->state == ROSE_STATE_5) {
1374                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1375                         rose_start_idletimer(sk);
1376                         rose->condition = 0x00;
1377                         rose->vs        = 0;
1378                         rose->va        = 0;
1379                         rose->vr        = 0;
1380                         rose->vl        = 0;
1381                         rose->state     = ROSE_STATE_3;
1382                 }
1383                 return 0;
1384
1385         default:
1386                 return -ENOIOCTLCMD;
1387         }
1388
1389         return 0;
1390 }
1391
1392 #ifdef CONFIG_PROC_FS
1393 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1394         __acquires(rose_list_lock)
1395 {
1396         spin_lock_bh(&rose_list_lock);
1397         return seq_hlist_start_head(&rose_list, *pos);
1398 }
1399
1400 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1401 {
1402         return seq_hlist_next(v, &rose_list, pos);
1403 }
1404
1405 static void rose_info_stop(struct seq_file *seq, void *v)
1406         __releases(rose_list_lock)
1407 {
1408         spin_unlock_bh(&rose_list_lock);
1409 }
1410
1411 static int rose_info_show(struct seq_file *seq, void *v)
1412 {
1413         char buf[11], rsbuf[11];
1414
1415         if (v == SEQ_START_TOKEN)
1416                 seq_puts(seq,
1417                          "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");
1418
1419         else {
1420                 struct sock *s = sk_entry(v);
1421                 struct rose_sock *rose = rose_sk(s);
1422                 const char *devname, *callsign;
1423                 const struct net_device *dev = rose->device;
1424
1425                 if (!dev)
1426                         devname = "???";
1427                 else
1428                         devname = dev->name;
1429
1430                 seq_printf(seq, "%-10s %-9s ",
1431                            rose2asc(rsbuf, &rose->dest_addr),
1432                            ax2asc(buf, &rose->dest_call));
1433
1434                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1435                         callsign = "??????-?";
1436                 else
1437                         callsign = ax2asc(buf, &rose->source_call);
1438
1439                 seq_printf(seq,
1440                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1441                         rose2asc(rsbuf, &rose->source_addr),
1442                         callsign,
1443                         devname,
1444                         rose->lci & 0x0FFF,
1445                         (rose->neighbour) ? rose->neighbour->number : 0,
1446                         rose->state,
1447                         rose->vs,
1448                         rose->vr,
1449                         rose->va,
1450                         ax25_display_timer(&rose->timer) / HZ,
1451                         rose->t1 / HZ,
1452                         rose->t2 / HZ,
1453                         rose->t3 / HZ,
1454                         rose->hb / HZ,
1455                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1456                         rose->idle / (60 * HZ),
1457                         sk_wmem_alloc_get(s),
1458                         sk_rmem_alloc_get(s),
1459                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1460         }
1461
1462         return 0;
1463 }
1464
1465 static const struct seq_operations rose_info_seqops = {
1466         .start = rose_info_start,
1467         .next = rose_info_next,
1468         .stop = rose_info_stop,
1469         .show = rose_info_show,
1470 };
1471 #endif  /* CONFIG_PROC_FS */
1472
1473 static const struct net_proto_family rose_family_ops = {
1474         .family         =       PF_ROSE,
1475         .create         =       rose_create,
1476         .owner          =       THIS_MODULE,
1477 };
1478
1479 static const struct proto_ops rose_proto_ops = {
1480         .family         =       PF_ROSE,
1481         .owner          =       THIS_MODULE,
1482         .release        =       rose_release,
1483         .bind           =       rose_bind,
1484         .connect        =       rose_connect,
1485         .socketpair     =       sock_no_socketpair,
1486         .accept         =       rose_accept,
1487         .getname        =       rose_getname,
1488         .poll           =       datagram_poll,
1489         .ioctl          =       rose_ioctl,
1490         .listen         =       rose_listen,
1491         .shutdown       =       sock_no_shutdown,
1492         .setsockopt     =       rose_setsockopt,
1493         .getsockopt     =       rose_getsockopt,
1494         .sendmsg        =       rose_sendmsg,
1495         .recvmsg        =       rose_recvmsg,
1496         .mmap           =       sock_no_mmap,
1497         .sendpage       =       sock_no_sendpage,
1498 };
1499
1500 static struct notifier_block rose_dev_notifier = {
1501         .notifier_call  =       rose_device_event,
1502 };
1503
1504 static struct net_device **dev_rose;
1505
1506 static struct ax25_protocol rose_pid = {
1507         .pid    = AX25_P_ROSE,
1508         .func   = rose_route_frame
1509 };
1510
1511 static struct ax25_linkfail rose_linkfail_notifier = {
1512         .func   = rose_link_failed
1513 };
1514
1515 static int __init rose_proto_init(void)
1516 {
1517         int i;
1518         int rc;
1519
1520         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1521                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1522                 rc = -EINVAL;
1523                 goto out;
1524         }
1525
1526         rc = proto_register(&rose_proto, 0);
1527         if (rc != 0)
1528                 goto out;
1529
1530         rose_callsign = null_ax25_address;
1531
1532         dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1533                            GFP_KERNEL);
1534         if (dev_rose == NULL) {
1535                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1536                 rc = -ENOMEM;
1537                 goto out_proto_unregister;
1538         }
1539
1540         for (i = 0; i < rose_ndevs; i++) {
1541                 struct net_device *dev;
1542                 char name[IFNAMSIZ];
1543
1544                 sprintf(name, "rose%d", i);
1545                 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1546                 if (!dev) {
1547                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1548                         rc = -ENOMEM;
1549                         goto fail;
1550                 }
1551                 rc = register_netdev(dev);
1552                 if (rc) {
1553                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1554                         free_netdev(dev);
1555                         goto fail;
1556                 }
1557                 rose_set_lockdep_key(dev);
1558                 dev_rose[i] = dev;
1559         }
1560
1561         sock_register(&rose_family_ops);
1562         register_netdevice_notifier(&rose_dev_notifier);
1563
1564         ax25_register_pid(&rose_pid);
1565         ax25_linkfail_register(&rose_linkfail_notifier);
1566
1567 #ifdef CONFIG_SYSCTL
1568         rose_register_sysctl();
1569 #endif
1570         rose_loopback_init();
1571
1572         rose_add_loopback_neigh();
1573
1574         proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1575         proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1576                     &rose_neigh_seqops);
1577         proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1578                     &rose_node_seqops);
1579         proc_create_seq("rose_routes", 0444, init_net.proc_net,
1580                     &rose_route_seqops);
1581 out:
1582         return rc;
1583 fail:
1584         while (--i >= 0) {
1585                 unregister_netdev(dev_rose[i]);
1586                 free_netdev(dev_rose[i]);
1587         }
1588         kfree(dev_rose);
1589 out_proto_unregister:
1590         proto_unregister(&rose_proto);
1591         goto out;
1592 }
1593 module_init(rose_proto_init);
1594
1595 module_param(rose_ndevs, int, 0);
1596 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1597
1598 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1599 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1600 MODULE_LICENSE("GPL");
1601 MODULE_ALIAS_NETPROTO(PF_ROSE);
1602
1603 static void __exit rose_exit(void)
1604 {
1605         int i;
1606
1607         remove_proc_entry("rose", init_net.proc_net);
1608         remove_proc_entry("rose_neigh", init_net.proc_net);
1609         remove_proc_entry("rose_nodes", init_net.proc_net);
1610         remove_proc_entry("rose_routes", init_net.proc_net);
1611         rose_loopback_clear();
1612
1613         rose_rt_free();
1614
1615         ax25_protocol_release(AX25_P_ROSE);
1616         ax25_linkfail_release(&rose_linkfail_notifier);
1617
1618         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1619                 ax25_listen_release(&rose_callsign, NULL);
1620
1621 #ifdef CONFIG_SYSCTL
1622         rose_unregister_sysctl();
1623 #endif
1624         unregister_netdevice_notifier(&rose_dev_notifier);
1625
1626         sock_unregister(PF_ROSE);
1627
1628         for (i = 0; i < rose_ndevs; i++) {
1629                 struct net_device *dev = dev_rose[i];
1630
1631                 if (dev) {
1632                         unregister_netdev(dev);
1633                         free_netdev(dev);
1634                 }
1635         }
1636
1637         kfree(dev_rose);
1638         proto_unregister(&rose_proto);
1639 }
1640
1641 module_exit(rose_exit);