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 *uaddr_len, 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         *uaddr_len = sizeof(struct full_sockaddr_rose);
 983         return 0;
 984 }
 985
 986 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 987 {
 988         struct sock *sk;
 989         struct sock *make;
 990         struct rose_sock *make_rose;
 991         struct rose_facilities_struct facilities;
 992         int n;
 993
 994         skb->sk = NULL;         /* Initially we don't know who it's for */
 995
 996         /*
 997          *      skb->data points to the rose frame start
 998          */
 999         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
1000
1001         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1002                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1003                                    &facilities)) {
1004                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1005                 return 0;
1006         }
1007
1008         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1009
1010         /*
1011          * We can't accept the Call Request.
1012          */
1013         if (sk == NULL || sk_acceptq_is_full(sk) ||
1014             (make = rose_make_new(sk)) == NULL) {
1015                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1016                 return 0;
1017         }
1018
1019         skb->sk     = make;
1020         make->sk_state = TCP_ESTABLISHED;
1021         make_rose = rose_sk(make);
1022
1023         make_rose->lci           = lci;
1024         make_rose->dest_addr     = facilities.dest_addr;
1025         make_rose->dest_call     = facilities.dest_call;
1026         make_rose->dest_ndigis   = facilities.dest_ndigis;
1027         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1028                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1029         make_rose->source_addr   = facilities.source_addr;
1030         make_rose->source_call   = facilities.source_call;
1031         make_rose->source_ndigis = facilities.source_ndigis;
1032         for (n = 0 ; n < facilities.source_ndigis ; n++)
1033                 make_rose->source_digis[n] = facilities.source_digis[n];
1034         make_rose->neighbour     = neigh;
1035         make_rose->device        = dev;
1036         make_rose->facilities    = facilities;
1037
1038         make_rose->neighbour->use++;
1039
1040         if (rose_sk(sk)->defer) {
1041                 make_rose->state = ROSE_STATE_5;
1042         } else {
1043                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1044                 make_rose->state = ROSE_STATE_3;
1045                 rose_start_idletimer(make);
1046         }
1047
1048         make_rose->condition = 0x00;
1049         make_rose->vs        = 0;
1050         make_rose->va        = 0;
1051         make_rose->vr        = 0;
1052         make_rose->vl        = 0;
1053         sk->sk_ack_backlog++;
1054
1055         rose_insert_socket(make);
1056
1057         skb_queue_head(&sk->sk_receive_queue, skb);
1058
1059         rose_start_heartbeat(make);
1060
1061         if (!sock_flag(sk, SOCK_DEAD))
1062                 sk->sk_data_ready(sk);
1063
1064         return 1;
1065 }
1066
1067 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1068 {
1069         struct sock *sk = sock->sk;
1070         struct rose_sock *rose = rose_sk(sk);
1071         DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1072         int err;
1073         struct full_sockaddr_rose srose;
1074         struct sk_buff *skb;
1075         unsigned char *asmptr;
1076         int n, size, qbit = 0;
1077
1078         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1079                 return -EINVAL;
1080
1081         if (sock_flag(sk, SOCK_ZAPPED))
1082                 return -EADDRNOTAVAIL;
1083
1084         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1085                 send_sig(SIGPIPE, current, 0);
1086                 return -EPIPE;
1087         }
1088
1089         if (rose->neighbour == NULL || rose->device == NULL)
1090                 return -ENETUNREACH;
1091
1092         if (usrose != NULL) {
1093                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1094                         return -EINVAL;
1095                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1096                 memcpy(&srose, usrose, msg->msg_namelen);
1097                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1098                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1099                         return -EISCONN;
1100                 if (srose.srose_ndigis != rose->dest_ndigis)
1101                         return -EISCONN;
1102                 if (srose.srose_ndigis == rose->dest_ndigis) {
1103                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1104                                 if (ax25cmp(&rose->dest_digis[n],
1105                                             &srose.srose_digis[n]))
1106                                         return -EISCONN;
1107                 }
1108                 if (srose.srose_family != AF_ROSE)
1109                         return -EINVAL;
1110         } else {
1111                 if (sk->sk_state != TCP_ESTABLISHED)
1112                         return -ENOTCONN;
1113
1114                 srose.srose_family = AF_ROSE;
1115                 srose.srose_addr   = rose->dest_addr;
1116                 srose.srose_call   = rose->dest_call;
1117                 srose.srose_ndigis = rose->dest_ndigis;
1118                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1119                         srose.srose_digis[n] = rose->dest_digis[n];
1120         }
1121
1122         /* Build a packet */
1123         /* Sanity check the packet size */
1124         if (len > 65535)
1125                 return -EMSGSIZE;
1126
1127         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1128
1129         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1130                 return err;
1131
1132         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1133
1134         /*
1135          *      Put the data on the end
1136          */
1137
1138         skb_reset_transport_header(skb);
1139         skb_put(skb, len);
1140
1141         err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1142         if (err) {
1143                 kfree_skb(skb);
1144                 return err;
1145         }
1146
1147         /*
1148          *      If the Q BIT Include socket option is in force, the first
1149          *      byte of the user data is the logical value of the Q Bit.
1150          */
1151         if (rose->qbitincl) {
1152                 qbit = skb->data[0];
1153                 skb_pull(skb, 1);
1154         }
1155
1156         /*
1157          *      Push down the ROSE header
1158          */
1159         asmptr = skb_push(skb, ROSE_MIN_LEN);
1160
1161         /* Build a ROSE Network header */
1162         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1163         asmptr[1] = (rose->lci >> 0) & 0xFF;
1164         asmptr[2] = ROSE_DATA;
1165
1166         if (qbit)
1167                 asmptr[0] |= ROSE_Q_BIT;
1168
1169         if (sk->sk_state != TCP_ESTABLISHED) {
1170                 kfree_skb(skb);
1171                 return -ENOTCONN;
1172         }
1173
1174 #ifdef M_BIT
1175 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1176         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1177                 unsigned char header[ROSE_MIN_LEN];
1178                 struct sk_buff *skbn;
1179                 int frontlen;
1180                 int lg;
1181
1182                 /* Save a copy of the Header */
1183                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1184                 skb_pull(skb, ROSE_MIN_LEN);
1185
1186                 frontlen = skb_headroom(skb);
1187
1188                 while (skb->len > 0) {
1189                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1190                                 kfree_skb(skb);
1191                                 return err;
1192                         }
1193
1194                         skbn->sk   = sk;
1195                         skbn->free = 1;
1196                         skbn->arp  = 1;
1197
1198                         skb_reserve(skbn, frontlen);
1199
1200                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1201
1202                         /* Copy the user data */
1203                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1204                         skb_pull(skb, lg);
1205
1206                         /* Duplicate the Header */
1207                         skb_push(skbn, ROSE_MIN_LEN);
1208                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1209
1210                         if (skb->len > 0)
1211                                 skbn->data[2] |= M_BIT;
1212
1213                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1214                 }
1215
1216                 skb->free = 1;
1217                 kfree_skb(skb);
1218         } else {
1219                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1220         }
1221 #else
1222         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1223 #endif
1224
1225         rose_kick(sk);
1226
1227         return len;
1228 }
1229
1230
1231 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1232                         int flags)
1233 {
1234         struct sock *sk = sock->sk;
1235         struct rose_sock *rose = rose_sk(sk);
1236         size_t copied;
1237         unsigned char *asmptr;
1238         struct sk_buff *skb;
1239         int n, er, qbit;
1240
1241         /*
1242          * This works for seqpacket too. The receiver has ordered the queue for
1243          * us! We do one quick check first though
1244          */
1245         if (sk->sk_state != TCP_ESTABLISHED)
1246                 return -ENOTCONN;
1247
1248         /* Now we can treat all alike */
1249         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1250                 return er;
1251
1252         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1253
1254         skb_pull(skb, ROSE_MIN_LEN);
1255
1256         if (rose->qbitincl) {
1257                 asmptr  = skb_push(skb, 1);
1258                 *asmptr = qbit;
1259         }
1260
1261         skb_reset_transport_header(skb);
1262         copied     = skb->len;
1263
1264         if (copied > size) {
1265                 copied = size;
1266                 msg->msg_flags |= MSG_TRUNC;
1267         }
1268
1269         skb_copy_datagram_msg(skb, 0, msg, copied);
1270
1271         if (msg->msg_name) {
1272                 struct sockaddr_rose *srose;
1273                 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1274                                  msg->msg_name);
1275
1276                 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1277                 srose = msg->msg_name;
1278                 srose->srose_family = AF_ROSE;
1279                 srose->srose_addr   = rose->dest_addr;
1280                 srose->srose_call   = rose->dest_call;
1281                 srose->srose_ndigis = rose->dest_ndigis;
1282                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1283                         full_srose->srose_digis[n] = rose->dest_digis[n];
1284                 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1285         }
1286
1287         skb_free_datagram(sk, skb);
1288
1289         return copied;
1290 }
1291
1292
1293 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1294 {
1295         struct sock *sk = sock->sk;
1296         struct rose_sock *rose = rose_sk(sk);
1297         void __user *argp = (void __user *)arg;
1298
1299         switch (cmd) {
1300         case TIOCOUTQ: {
1301                 long amount;
1302
1303                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1304                 if (amount < 0)
1305                         amount = 0;
1306                 return put_user(amount, (unsigned int __user *) argp);
1307         }
1308
1309         case TIOCINQ: {
1310                 struct sk_buff *skb;
1311                 long amount = 0L;
1312                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1313                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1314                         amount = skb->len;
1315                 return put_user(amount, (unsigned int __user *) argp);
1316         }
1317
1318         case SIOCGSTAMP:
1319                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1320
1321         case SIOCGSTAMPNS:
1322                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1323
1324         case SIOCGIFADDR:
1325         case SIOCSIFADDR:
1326         case SIOCGIFDSTADDR:
1327         case SIOCSIFDSTADDR:
1328         case SIOCGIFBRDADDR:
1329         case SIOCSIFBRDADDR:
1330         case SIOCGIFNETMASK:
1331         case SIOCSIFNETMASK:
1332         case SIOCGIFMETRIC:
1333         case SIOCSIFMETRIC:
1334                 return -EINVAL;
1335
1336         case SIOCADDRT:
1337         case SIOCDELRT:
1338         case SIOCRSCLRRT:
1339                 if (!capable(CAP_NET_ADMIN))
1340                         return -EPERM;
1341                 return rose_rt_ioctl(cmd, argp);
1342
1343         case SIOCRSGCAUSE: {
1344                 struct rose_cause_struct rose_cause;
1345                 rose_cause.cause      = rose->cause;
1346                 rose_cause.diagnostic = rose->diagnostic;
1347                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1348         }
1349
1350         case SIOCRSSCAUSE: {
1351                 struct rose_cause_struct rose_cause;
1352                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1353                         return -EFAULT;
1354                 rose->cause      = rose_cause.cause;
1355                 rose->diagnostic = rose_cause.diagnostic;
1356                 return 0;
1357         }
1358
1359         case SIOCRSSL2CALL:
1360                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1361                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1362                         ax25_listen_release(&rose_callsign, NULL);
1363                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1364                         return -EFAULT;
1365                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1366                         return ax25_listen_register(&rose_callsign, NULL);
1367
1368                 return 0;
1369
1370         case SIOCRSGL2CALL:
1371                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1372
1373         case SIOCRSACCEPT:
1374                 if (rose->state == ROSE_STATE_5) {
1375                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1376                         rose_start_idletimer(sk);
1377                         rose->condition = 0x00;
1378                         rose->vs        = 0;
1379                         rose->va        = 0;
1380                         rose->vr        = 0;
1381                         rose->vl        = 0;
1382                         rose->state     = ROSE_STATE_3;
1383                 }
1384                 return 0;
1385
1386         default:
1387                 return -ENOIOCTLCMD;
1388         }
1389
1390         return 0;
1391 }
1392
1393 #ifdef CONFIG_PROC_FS
1394 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1395         __acquires(rose_list_lock)
1396 {
1397         spin_lock_bh(&rose_list_lock);
1398         return seq_hlist_start_head(&rose_list, *pos);
1399 }
1400
1401 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1402 {
1403         return seq_hlist_next(v, &rose_list, pos);
1404 }
1405
1406 static void rose_info_stop(struct seq_file *seq, void *v)
1407         __releases(rose_list_lock)
1408 {
1409         spin_unlock_bh(&rose_list_lock);
1410 }
1411
1412 static int rose_info_show(struct seq_file *seq, void *v)
1413 {
1414         char buf[11], rsbuf[11];
1415
1416         if (v == SEQ_START_TOKEN)
1417                 seq_puts(seq,
1418                          "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");
1419
1420         else {
1421                 struct sock *s = sk_entry(v);
1422                 struct rose_sock *rose = rose_sk(s);
1423                 const char *devname, *callsign;
1424                 const struct net_device *dev = rose->device;
1425
1426                 if (!dev)
1427                         devname = "???";
1428                 else
1429                         devname = dev->name;
1430
1431                 seq_printf(seq, "%-10s %-9s ",
1432                            rose2asc(rsbuf, &rose->dest_addr),
1433                            ax2asc(buf, &rose->dest_call));
1434
1435                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1436                         callsign = "??????-?";
1437                 else
1438                         callsign = ax2asc(buf, &rose->source_call);
1439
1440                 seq_printf(seq,
1441                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1442                         rose2asc(rsbuf, &rose->source_addr),
1443                         callsign,
1444                         devname,
1445                         rose->lci & 0x0FFF,
1446                         (rose->neighbour) ? rose->neighbour->number : 0,
1447                         rose->state,
1448                         rose->vs,
1449                         rose->vr,
1450                         rose->va,
1451                         ax25_display_timer(&rose->timer) / HZ,
1452                         rose->t1 / HZ,
1453                         rose->t2 / HZ,
1454                         rose->t3 / HZ,
1455                         rose->hb / HZ,
1456                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1457                         rose->idle / (60 * HZ),
1458                         sk_wmem_alloc_get(s),
1459                         sk_rmem_alloc_get(s),
1460                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1461         }
1462
1463         return 0;
1464 }
1465
1466 static const struct seq_operations rose_info_seqops = {
1467         .start = rose_info_start,
1468         .next = rose_info_next,
1469         .stop = rose_info_stop,
1470         .show = rose_info_show,
1471 };
1472
1473 static int rose_info_open(struct inode *inode, struct file *file)
1474 {
1475         return seq_open(file, &rose_info_seqops);
1476 }
1477
1478 static const struct file_operations rose_info_fops = {
1479         .owner = THIS_MODULE,
1480         .open = rose_info_open,
1481         .read = seq_read,
1482         .llseek = seq_lseek,
1483         .release = seq_release,
1484 };
1485 #endif  /* CONFIG_PROC_FS */
1486
1487 static const struct net_proto_family rose_family_ops = {
1488         .family         =       PF_ROSE,
1489         .create         =       rose_create,
1490         .owner          =       THIS_MODULE,
1491 };
1492
1493 static const struct proto_ops rose_proto_ops = {
1494         .family         =       PF_ROSE,
1495         .owner          =       THIS_MODULE,
1496         .release        =       rose_release,
1497         .bind           =       rose_bind,
1498         .connect        =       rose_connect,
1499         .socketpair     =       sock_no_socketpair,
1500         .accept         =       rose_accept,
1501         .getname        =       rose_getname,
1502         .poll           =       datagram_poll,
1503         .ioctl          =       rose_ioctl,
1504         .listen         =       rose_listen,
1505         .shutdown       =       sock_no_shutdown,
1506         .setsockopt     =       rose_setsockopt,
1507         .getsockopt     =       rose_getsockopt,
1508         .sendmsg        =       rose_sendmsg,
1509         .recvmsg        =       rose_recvmsg,
1510         .mmap           =       sock_no_mmap,
1511         .sendpage       =       sock_no_sendpage,
1512 };
1513
1514 static struct notifier_block rose_dev_notifier = {
1515         .notifier_call  =       rose_device_event,
1516 };
1517
1518 static struct net_device **dev_rose;
1519
1520 static struct ax25_protocol rose_pid = {
1521         .pid    = AX25_P_ROSE,
1522         .func   = rose_route_frame
1523 };
1524
1525 static struct ax25_linkfail rose_linkfail_notifier = {
1526         .func   = rose_link_failed
1527 };
1528
1529 static int __init rose_proto_init(void)
1530 {
1531         int i;
1532         int rc;
1533
1534         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1535                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1536                 rc = -EINVAL;
1537                 goto out;
1538         }
1539
1540         rc = proto_register(&rose_proto, 0);
1541         if (rc != 0)
1542                 goto out;
1543
1544         rose_callsign = null_ax25_address;
1545
1546         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1547         if (dev_rose == NULL) {
1548                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1549                 rc = -ENOMEM;
1550                 goto out_proto_unregister;
1551         }
1552
1553         for (i = 0; i < rose_ndevs; i++) {
1554                 struct net_device *dev;
1555                 char name[IFNAMSIZ];
1556
1557                 sprintf(name, "rose%d", i);
1558                 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1559                 if (!dev) {
1560                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1561                         rc = -ENOMEM;
1562                         goto fail;
1563                 }
1564                 rc = register_netdev(dev);
1565                 if (rc) {
1566                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1567                         free_netdev(dev);
1568                         goto fail;
1569                 }
1570                 rose_set_lockdep_key(dev);
1571                 dev_rose[i] = dev;
1572         }
1573
1574         sock_register(&rose_family_ops);
1575         register_netdevice_notifier(&rose_dev_notifier);
1576
1577         ax25_register_pid(&rose_pid);
1578         ax25_linkfail_register(&rose_linkfail_notifier);
1579
1580 #ifdef CONFIG_SYSCTL
1581         rose_register_sysctl();
1582 #endif
1583         rose_loopback_init();
1584
1585         rose_add_loopback_neigh();
1586
1587         proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1588         proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1589                     &rose_neigh_fops);
1590         proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1591                     &rose_nodes_fops);
1592         proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1593                     &rose_routes_fops);
1594 out:
1595         return rc;
1596 fail:
1597         while (--i >= 0) {
1598                 unregister_netdev(dev_rose[i]);
1599                 free_netdev(dev_rose[i]);
1600         }
1601         kfree(dev_rose);
1602 out_proto_unregister:
1603         proto_unregister(&rose_proto);
1604         goto out;
1605 }
1606 module_init(rose_proto_init);
1607
1608 module_param(rose_ndevs, int, 0);
1609 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1610
1611 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1612 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1613 MODULE_LICENSE("GPL");
1614 MODULE_ALIAS_NETPROTO(PF_ROSE);
1615
1616 static void __exit rose_exit(void)
1617 {
1618         int i;
1619
1620         remove_proc_entry("rose", init_net.proc_net);
1621         remove_proc_entry("rose_neigh", init_net.proc_net);
1622         remove_proc_entry("rose_nodes", init_net.proc_net);
1623         remove_proc_entry("rose_routes", init_net.proc_net);
1624         rose_loopback_clear();
1625
1626         rose_rt_free();
1627
1628         ax25_protocol_release(AX25_P_ROSE);
1629         ax25_linkfail_release(&rose_linkfail_notifier);
1630
1631         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1632                 ax25_listen_release(&rose_callsign, NULL);
1633
1634 #ifdef CONFIG_SYSCTL
1635         rose_unregister_sysctl();
1636 #endif
1637         unregister_netdevice_notifier(&rose_dev_notifier);
1638
1639         sock_unregister(PF_ROSE);
1640
1641         for (i = 0; i < rose_ndevs; i++) {
1642                 struct net_device *dev = dev_rose[i];
1643
1644                 if (dev) {
1645                         unregister_netdev(dev);
1646                         free_netdev(dev);
1647                 }
1648         }
1649
1650         kfree(dev_rose);
1651         proto_unregister(&rose_proto);
1652 }
1653
1654 module_exit(rose_exit);