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/kernel.h>
  22 #include <linux/sched.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/timer.h>
  25 #include <linux/string.h>
  26 #include <linux/sockios.h>
  27 #include <linux/net.h>
  28 #include <linux/stat.h>
  29 #include <net/net_namespace.h>
  30 #include <net/ax25.h>
  31 #include <linux/inet.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/if_arp.h>
  34 #include <linux/skbuff.h>
  35 #include <net/sock.h>
  36 #include <asm/system.h>
  37 #include <asm/uaccess.h>
  38 #include <linux/fcntl.h>
  39 #include <linux/termios.h>
  40 #include <linux/mm.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/notifier.h>
  43 #include <net/rose.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/seq_file.h>
  46 #include <net/tcp_states.h>
  47 #include <net/ip.h>
  48 #include <net/arp.h>
  49
  50 static int rose_ndevs = 10;
  51
  52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  53 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  54 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  55 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  56 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  57 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  58 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  59 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  60 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  61 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  62
  63 static HLIST_HEAD(rose_list);
  64 static DEFINE_SPINLOCK(rose_list_lock);
  65
  66 static struct proto_ops rose_proto_ops;
  67
  68 ax25_address rose_callsign;
  69
  70 /*
  71  * 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         struct hlist_node *node;
 169
 170         spin_lock_bh(&rose_list_lock);
 171         sk_for_each(s, node, &rose_list) {
 172                 struct rose_sock *rose = rose_sk(s);
 173
 174                 if (rose->neighbour == neigh) {
 175                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 176                         rose->neighbour->use--;
 177                         rose->neighbour = NULL;
 178                 }
 179         }
 180         spin_unlock_bh(&rose_list_lock);
 181 }
 182
 183 /*
 184  *      Kill all bound sockets on a dropped device.
 185  */
 186 static void rose_kill_by_device(struct net_device *dev)
 187 {
 188         struct sock *s;
 189         struct hlist_node *node;
 190
 191         spin_lock_bh(&rose_list_lock);
 192         sk_for_each(s, node, &rose_list) {
 193                 struct rose_sock *rose = rose_sk(s);
 194
 195                 if (rose->device == dev) {
 196                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 197                         rose->neighbour->use--;
 198                         rose->device = NULL;
 199                 }
 200         }
 201         spin_unlock_bh(&rose_list_lock);
 202 }
 203
 204 /*
 205  *      Handle device status changes.
 206  */
 207 static int rose_device_event(struct notifier_block *this, unsigned long event,
 208         void *ptr)
 209 {
 210         struct net_device *dev = (struct net_device *)ptr;
 211
 212         if (!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         struct hlist_node *node;
 250
 251         spin_lock_bh(&rose_list_lock);
 252         sk_for_each(s, node, &rose_list) {
 253                 struct rose_sock *rose = rose_sk(s);
 254
 255                 if (!rosecmp(&rose->source_addr, addr) &&
 256                     !ax25cmp(&rose->source_call, call) &&
 257                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 258                         goto found;
 259         }
 260
 261         sk_for_each(s, node, &rose_list) {
 262                 struct rose_sock *rose = rose_sk(s);
 263
 264                 if (!rosecmp(&rose->source_addr, addr) &&
 265                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 266                     s->sk_state == TCP_LISTEN)
 267                         goto found;
 268         }
 269         s = NULL;
 270 found:
 271         spin_unlock_bh(&rose_list_lock);
 272         return s;
 273 }
 274
 275 /*
 276  *      Find a connected ROSE socket given my LCI and device.
 277  */
 278 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 279 {
 280         struct sock *s;
 281         struct hlist_node *node;
 282
 283         spin_lock_bh(&rose_list_lock);
 284         sk_for_each(s, node, &rose_list) {
 285                 struct rose_sock *rose = rose_sk(s);
 286
 287                 if (rose->lci == lci && rose->neighbour == neigh)
 288                         goto found;
 289         }
 290         s = NULL;
 291 found:
 292         spin_unlock_bh(&rose_list_lock);
 293         return s;
 294 }
 295
 296 /*
 297  *      Find a unique LCI for a given device.
 298  */
 299 unsigned int rose_new_lci(struct rose_neigh *neigh)
 300 {
 301         int lci;
 302
 303         if (neigh->dce_mode) {
 304                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 305                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 306                                 return lci;
 307         } else {
 308                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 309                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 310                                 return lci;
 311         }
 312
 313         return 0;
 314 }
 315
 316 /*
 317  *      Deferred destroy.
 318  */
 319 void rose_destroy_socket(struct sock *);
 320
 321 /*
 322  *      Handler for deferred kills.
 323  */
 324 static void rose_destroy_timer(unsigned long data)
 325 {
 326         rose_destroy_socket((struct sock *)data);
 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                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 360                                 (unsigned long)sk);
 361                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 362                 add_timer(&sk->sk_timer);
 363         } else
 364                 sock_put(sk);
 365 }
 366
 367 /*
 368  *      Handling for system calls applied via the various interfaces to a
 369  *      ROSE socket object.
 370  */
 371
 372 static int rose_setsockopt(struct socket *sock, int level, int optname,
 373         char __user *optval, int optlen)
 374 {
 375         struct sock *sk = sock->sk;
 376         struct rose_sock *rose = rose_sk(sk);
 377         int opt;
 378
 379         if (level != SOL_ROSE)
 380                 return -ENOPROTOOPT;
 381
 382         if (optlen < sizeof(int))
 383                 return -EINVAL;
 384
 385         if (get_user(opt, (int __user *)optval))
 386                 return -EFAULT;
 387
 388         switch (optname) {
 389         case ROSE_DEFER:
 390                 rose->defer = opt ? 1 : 0;
 391                 return 0;
 392
 393         case ROSE_T1:
 394                 if (opt < 1)
 395                         return -EINVAL;
 396                 rose->t1 = opt * HZ;
 397                 return 0;
 398
 399         case ROSE_T2:
 400                 if (opt < 1)
 401                         return -EINVAL;
 402                 rose->t2 = opt * HZ;
 403                 return 0;
 404
 405         case ROSE_T3:
 406                 if (opt < 1)
 407                         return -EINVAL;
 408                 rose->t3 = opt * HZ;
 409                 return 0;
 410
 411         case ROSE_HOLDBACK:
 412                 if (opt < 1)
 413                         return -EINVAL;
 414                 rose->hb = opt * HZ;
 415                 return 0;
 416
 417         case ROSE_IDLE:
 418                 if (opt < 0)
 419                         return -EINVAL;
 420                 rose->idle = opt * 60 * HZ;
 421                 return 0;
 422
 423         case ROSE_QBITINCL:
 424                 rose->qbitincl = opt ? 1 : 0;
 425                 return 0;
 426
 427         default:
 428                 return -ENOPROTOOPT;
 429         }
 430 }
 431
 432 static int rose_getsockopt(struct socket *sock, int level, int optname,
 433         char __user *optval, int __user *optlen)
 434 {
 435         struct sock *sk = sock->sk;
 436         struct rose_sock *rose = rose_sk(sk);
 437         int val = 0;
 438         int len;
 439
 440         if (level != SOL_ROSE)
 441                 return -ENOPROTOOPT;
 442
 443         if (get_user(len, optlen))
 444                 return -EFAULT;
 445
 446         if (len < 0)
 447                 return -EINVAL;
 448
 449         switch (optname) {
 450         case ROSE_DEFER:
 451                 val = rose->defer;
 452                 break;
 453
 454         case ROSE_T1:
 455                 val = rose->t1 / HZ;
 456                 break;
 457
 458         case ROSE_T2:
 459                 val = rose->t2 / HZ;
 460                 break;
 461
 462         case ROSE_T3:
 463                 val = rose->t3 / HZ;
 464                 break;
 465
 466         case ROSE_HOLDBACK:
 467                 val = rose->hb / HZ;
 468                 break;
 469
 470         case ROSE_IDLE:
 471                 val = rose->idle / (60 * HZ);
 472                 break;
 473
 474         case ROSE_QBITINCL:
 475                 val = rose->qbitincl;
 476                 break;
 477
 478         default:
 479                 return -ENOPROTOOPT;
 480         }
 481
 482         len = min_t(unsigned int, len, sizeof(int));
 483
 484         if (put_user(len, optlen))
 485                 return -EFAULT;
 486
 487         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 488 }
 489
 490 static int rose_listen(struct socket *sock, int backlog)
 491 {
 492         struct sock *sk = sock->sk;
 493
 494         if (sk->sk_state != TCP_LISTEN) {
 495                 struct rose_sock *rose = rose_sk(sk);
 496
 497                 rose->dest_ndigis = 0;
 498                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 499                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 500                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 501                 sk->sk_max_ack_backlog = backlog;
 502                 sk->sk_state           = TCP_LISTEN;
 503                 return 0;
 504         }
 505
 506         return -EOPNOTSUPP;
 507 }
 508
 509 static struct proto rose_proto = {
 510         .name     = "ROSE",
 511         .owner    = THIS_MODULE,
 512         .obj_size = sizeof(struct rose_sock),
 513 };
 514
 515 static int rose_create(struct net *net, struct socket *sock, int protocol)
 516 {
 517         struct sock *sk;
 518         struct rose_sock *rose;
 519
 520         if (net != &init_net)
 521                 return -EAFNOSUPPORT;
 522
 523         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 524                 return -ESOCKTNOSUPPORT;
 525
 526         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 527         if (sk == NULL)
 528                 return -ENOMEM;
 529
 530         rose = rose_sk(sk);
 531
 532         sock_init_data(sock, sk);
 533
 534         skb_queue_head_init(&rose->ack_queue);
 535 #ifdef M_BIT
 536         skb_queue_head_init(&rose->frag_queue);
 537         rose->fraglen    = 0;
 538 #endif
 539
 540         sock->ops    = &rose_proto_ops;
 541         sk->sk_protocol = protocol;
 542
 543         init_timer(&rose->timer);
 544         init_timer(&rose->idletimer);
 545
 546         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 547         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 548         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 549         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 550         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 551
 552         rose->state = ROSE_STATE_0;
 553
 554         return 0;
 555 }
 556
 557 static struct sock *rose_make_new(struct sock *osk)
 558 {
 559         struct sock *sk;
 560         struct rose_sock *rose, *orose;
 561
 562         if (osk->sk_type != SOCK_SEQPACKET)
 563                 return NULL;
 564
 565         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
 566         if (sk == NULL)
 567                 return NULL;
 568
 569         rose = rose_sk(sk);
 570
 571         sock_init_data(NULL, sk);
 572
 573         skb_queue_head_init(&rose->ack_queue);
 574 #ifdef M_BIT
 575         skb_queue_head_init(&rose->frag_queue);
 576         rose->fraglen  = 0;
 577 #endif
 578
 579         sk->sk_type     = osk->sk_type;
 580         sk->sk_priority = osk->sk_priority;
 581         sk->sk_protocol = osk->sk_protocol;
 582         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 583         sk->sk_sndbuf   = osk->sk_sndbuf;
 584         sk->sk_state    = TCP_ESTABLISHED;
 585         sock_copy_flags(sk, osk);
 586
 587         init_timer(&rose->timer);
 588         init_timer(&rose->idletimer);
 589
 590         orose           = rose_sk(osk);
 591         rose->t1        = orose->t1;
 592         rose->t2        = orose->t2;
 593         rose->t3        = orose->t3;
 594         rose->hb        = orose->hb;
 595         rose->idle      = orose->idle;
 596         rose->defer     = orose->defer;
 597         rose->device    = orose->device;
 598         rose->qbitincl  = orose->qbitincl;
 599
 600         return sk;
 601 }
 602
 603 static int rose_release(struct socket *sock)
 604 {
 605         struct sock *sk = sock->sk;
 606         struct rose_sock *rose;
 607
 608         if (sk == NULL) return 0;
 609
 610         sock_hold(sk);
 611         sock_orphan(sk);
 612         lock_sock(sk);
 613         rose = rose_sk(sk);
 614
 615         switch (rose->state) {
 616         case ROSE_STATE_0:
 617                 release_sock(sk);
 618                 rose_disconnect(sk, 0, -1, -1);
 619                 lock_sock(sk);
 620                 rose_destroy_socket(sk);
 621                 break;
 622
 623         case ROSE_STATE_2:
 624                 rose->neighbour->use--;
 625                 release_sock(sk);
 626                 rose_disconnect(sk, 0, -1, -1);
 627                 lock_sock(sk);
 628                 rose_destroy_socket(sk);
 629                 break;
 630
 631         case ROSE_STATE_1:
 632         case ROSE_STATE_3:
 633         case ROSE_STATE_4:
 634         case ROSE_STATE_5:
 635                 rose_clear_queues(sk);
 636                 rose_stop_idletimer(sk);
 637                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 638                 rose_start_t3timer(sk);
 639                 rose->state  = ROSE_STATE_2;
 640                 sk->sk_state    = TCP_CLOSE;
 641                 sk->sk_shutdown |= SEND_SHUTDOWN;
 642                 sk->sk_state_change(sk);
 643                 sock_set_flag(sk, SOCK_DEAD);
 644                 sock_set_flag(sk, SOCK_DESTROY);
 645                 break;
 646
 647         default:
 648                 break;
 649         }
 650
 651         sock->sk = NULL;
 652         release_sock(sk);
 653         sock_put(sk);
 654
 655         return 0;
 656 }
 657
 658 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 659 {
 660         struct sock *sk = sock->sk;
 661         struct rose_sock *rose = rose_sk(sk);
 662         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 663         struct net_device *dev;
 664         ax25_address *source;
 665         ax25_uid_assoc *user;
 666         int n;
 667
 668         if (!sock_flag(sk, SOCK_ZAPPED))
 669                 return -EINVAL;
 670
 671         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 672                 return -EINVAL;
 673
 674         if (addr->srose_family != AF_ROSE)
 675                 return -EINVAL;
 676
 677         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 678                 return -EINVAL;
 679
 680         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 681                 return -EINVAL;
 682
 683         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 684                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 685                 return -EADDRNOTAVAIL;
 686         }
 687
 688         source = &addr->srose_call;
 689
 690         user = ax25_findbyuid(current_euid());
 691         if (user) {
 692                 rose->source_call = user->call;
 693                 ax25_uid_put(user);
 694         } else {
 695                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 696                         return -EACCES;
 697                 rose->source_call   = *source;
 698         }
 699
 700         rose->source_addr   = addr->srose_addr;
 701         rose->device        = dev;
 702         rose->source_ndigis = addr->srose_ndigis;
 703
 704         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 705                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 706                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 707                         rose->source_digis[n] = full_addr->srose_digis[n];
 708         } else {
 709                 if (rose->source_ndigis == 1) {
 710                         rose->source_digis[0] = addr->srose_digi;
 711                 }
 712         }
 713
 714         rose_insert_socket(sk);
 715
 716         sock_reset_flag(sk, SOCK_ZAPPED);
 717         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 718         return 0;
 719 }
 720
 721 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 722 {
 723         struct sock *sk = sock->sk;
 724         struct rose_sock *rose = rose_sk(sk);
 725         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 726         unsigned char cause, diagnostic;
 727         struct net_device *dev;
 728         ax25_uid_assoc *user;
 729         int n, err = 0;
 730
 731         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 732                 return -EINVAL;
 733
 734         if (addr->srose_family != AF_ROSE)
 735                 return -EINVAL;
 736
 737         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 738                 return -EINVAL;
 739
 740         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 741                 return -EINVAL;
 742
 743         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 744         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 745                 return -EINVAL;
 746
 747         lock_sock(sk);
 748
 749         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 750                 /* Connect completed during a ERESTARTSYS event */
 751                 sock->state = SS_CONNECTED;
 752                 goto out_release;
 753         }
 754
 755         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 756                 sock->state = SS_UNCONNECTED;
 757                 err = -ECONNREFUSED;
 758                 goto out_release;
 759         }
 760
 761         if (sk->sk_state == TCP_ESTABLISHED) {
 762                 /* No reconnect on a seqpacket socket */
 763                 err = -EISCONN;
 764                 goto out_release;
 765         }
 766
 767         sk->sk_state   = TCP_CLOSE;
 768         sock->state = SS_UNCONNECTED;
 769
 770         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 771                                          &diagnostic, 0);
 772         if (!rose->neighbour) {
 773                 err = -ENETUNREACH;
 774                 goto out_release;
 775         }
 776
 777         rose->lci = rose_new_lci(rose->neighbour);
 778         if (!rose->lci) {
 779                 err = -ENETUNREACH;
 780                 goto out_release;
 781         }
 782
 783         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 784                 sock_reset_flag(sk, SOCK_ZAPPED);
 785
 786                 if ((dev = rose_dev_first()) == NULL) {
 787                         err = -ENETUNREACH;
 788                         goto out_release;
 789                 }
 790
 791                 user = ax25_findbyuid(current_euid());
 792                 if (!user) {
 793                         err = -EINVAL;
 794                         goto out_release;
 795                 }
 796
 797                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 798                 rose->source_call = user->call;
 799                 rose->device      = dev;
 800                 ax25_uid_put(user);
 801
 802                 rose_insert_socket(sk);         /* Finish the bind */
 803         }
 804 rose_try_next_neigh:
 805         rose->dest_addr   = addr->srose_addr;
 806         rose->dest_call   = addr->srose_call;
 807         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 808         rose->dest_ndigis = addr->srose_ndigis;
 809
 810         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 811                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 812                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 813                         rose->dest_digis[n] = full_addr->srose_digis[n];
 814         } else {
 815                 if (rose->dest_ndigis == 1) {
 816                         rose->dest_digis[0] = addr->srose_digi;
 817                 }
 818         }
 819
 820         /* Move to connecting socket, start sending Connect Requests */
 821         sock->state   = SS_CONNECTING;
 822         sk->sk_state     = TCP_SYN_SENT;
 823
 824         rose->state = ROSE_STATE_1;
 825
 826         rose->neighbour->use++;
 827
 828         rose_write_internal(sk, ROSE_CALL_REQUEST);
 829         rose_start_heartbeat(sk);
 830         rose_start_t1timer(sk);
 831
 832         /* Now the loop */
 833         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 834                 err = -EINPROGRESS;
 835                 goto out_release;
 836         }
 837
 838         /*
 839          * A Connect Ack with Choke or timeout or failed routing will go to
 840          * closed.
 841          */
 842         if (sk->sk_state == TCP_SYN_SENT) {
 843                 DEFINE_WAIT(wait);
 844
 845                 for (;;) {
 846                         prepare_to_wait(sk->sk_sleep, &wait,
 847                                         TASK_INTERRUPTIBLE);
 848                         if (sk->sk_state != TCP_SYN_SENT)
 849                                 break;
 850                         if (!signal_pending(current)) {
 851                                 release_sock(sk);
 852                                 schedule();
 853                                 lock_sock(sk);
 854                                 continue;
 855                         }
 856                         err = -ERESTARTSYS;
 857                         break;
 858                 }
 859                 finish_wait(sk->sk_sleep, &wait);
 860
 861                 if (err)
 862                         goto out_release;
 863         }
 864
 865         if (sk->sk_state != TCP_ESTABLISHED) {
 866         /* Try next neighbour */
 867                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
 868                 if (rose->neighbour)
 869                         goto rose_try_next_neigh;
 870
 871                 /* No more neighbours */
 872                 sock->state = SS_UNCONNECTED;
 873                 err = sock_error(sk);   /* Always set at this point */
 874                 goto out_release;
 875         }
 876
 877         sock->state = SS_CONNECTED;
 878
 879 out_release:
 880         release_sock(sk);
 881
 882         return err;
 883 }
 884
 885 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 886 {
 887         struct sk_buff *skb;
 888         struct sock *newsk;
 889         DEFINE_WAIT(wait);
 890         struct sock *sk;
 891         int err = 0;
 892
 893         if ((sk = sock->sk) == NULL)
 894                 return -EINVAL;
 895
 896         lock_sock(sk);
 897         if (sk->sk_type != SOCK_SEQPACKET) {
 898                 err = -EOPNOTSUPP;
 899                 goto out_release;
 900         }
 901
 902         if (sk->sk_state != TCP_LISTEN) {
 903                 err = -EINVAL;
 904                 goto out_release;
 905         }
 906
 907         /*
 908          *      The write queue this time is holding sockets ready to use
 909          *      hooked into the SABM we saved
 910          */
 911         for (;;) {
 912                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 913
 914                 skb = skb_dequeue(&sk->sk_receive_queue);
 915                 if (skb)
 916                         break;
 917
 918                 if (flags & O_NONBLOCK) {
 919                         err = -EWOULDBLOCK;
 920                         break;
 921                 }
 922                 if (!signal_pending(current)) {
 923                         release_sock(sk);
 924                         schedule();
 925                         lock_sock(sk);
 926                         continue;
 927                 }
 928                 err = -ERESTARTSYS;
 929                 break;
 930         }
 931         finish_wait(sk->sk_sleep, &wait);
 932         if (err)
 933                 goto out_release;
 934
 935         newsk = skb->sk;
 936         sock_graft(newsk, newsock);
 937
 938         /* Now attach up the new socket */
 939         skb->sk = NULL;
 940         kfree_skb(skb);
 941         sk->sk_ack_backlog--;
 942
 943 out_release:
 944         release_sock(sk);
 945
 946         return err;
 947 }
 948
 949 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 950         int *uaddr_len, int peer)
 951 {
 952         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 953         struct sock *sk = sock->sk;
 954         struct rose_sock *rose = rose_sk(sk);
 955         int n;
 956
 957         if (peer != 0) {
 958                 if (sk->sk_state != TCP_ESTABLISHED)
 959                         return -ENOTCONN;
 960                 srose->srose_family = AF_ROSE;
 961                 srose->srose_addr   = rose->dest_addr;
 962                 srose->srose_call   = rose->dest_call;
 963                 srose->srose_ndigis = rose->dest_ndigis;
 964                 for (n = 0; n < rose->dest_ndigis; n++)
 965                         srose->srose_digis[n] = rose->dest_digis[n];
 966         } else {
 967                 srose->srose_family = AF_ROSE;
 968                 srose->srose_addr   = rose->source_addr;
 969                 srose->srose_call   = rose->source_call;
 970                 srose->srose_ndigis = rose->source_ndigis;
 971                 for (n = 0; n < rose->source_ndigis; n++)
 972                         srose->srose_digis[n] = rose->source_digis[n];
 973         }
 974
 975         *uaddr_len = sizeof(struct full_sockaddr_rose);
 976         return 0;
 977 }
 978
 979 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 980 {
 981         struct sock *sk;
 982         struct sock *make;
 983         struct rose_sock *make_rose;
 984         struct rose_facilities_struct facilities;
 985         int n, len;
 986
 987         skb->sk = NULL;         /* Initially we don't know who it's for */
 988
 989         /*
 990          *      skb->data points to the rose frame start
 991          */
 992         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 993
 994         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
 995         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
 996         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 997                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 998                 return 0;
 999         }
1000
1001         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1002
1003         /*
1004          * We can't accept the Call Request.
1005          */
1006         if (sk == NULL || sk_acceptq_is_full(sk) ||
1007             (make = rose_make_new(sk)) == NULL) {
1008                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1009                 return 0;
1010         }
1011
1012         skb->sk     = make;
1013         make->sk_state = TCP_ESTABLISHED;
1014         make_rose = rose_sk(make);
1015
1016         make_rose->lci           = lci;
1017         make_rose->dest_addr     = facilities.dest_addr;
1018         make_rose->dest_call     = facilities.dest_call;
1019         make_rose->dest_ndigis   = facilities.dest_ndigis;
1020         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1021                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1022         make_rose->source_addr   = facilities.source_addr;
1023         make_rose->source_call   = facilities.source_call;
1024         make_rose->source_ndigis = facilities.source_ndigis;
1025         for (n = 0 ; n < facilities.source_ndigis ; n++)
1026                 make_rose->source_digis[n]= facilities.source_digis[n];
1027         make_rose->neighbour     = neigh;
1028         make_rose->device        = dev;
1029         make_rose->facilities    = facilities;
1030
1031         make_rose->neighbour->use++;
1032
1033         if (rose_sk(sk)->defer) {
1034                 make_rose->state = ROSE_STATE_5;
1035         } else {
1036                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1037                 make_rose->state = ROSE_STATE_3;
1038                 rose_start_idletimer(make);
1039         }
1040
1041         make_rose->condition = 0x00;
1042         make_rose->vs        = 0;
1043         make_rose->va        = 0;
1044         make_rose->vr        = 0;
1045         make_rose->vl        = 0;
1046         sk->sk_ack_backlog++;
1047
1048         rose_insert_socket(make);
1049
1050         skb_queue_head(&sk->sk_receive_queue, skb);
1051
1052         rose_start_heartbeat(make);
1053
1054         if (!sock_flag(sk, SOCK_DEAD))
1055                 sk->sk_data_ready(sk, skb->len);
1056
1057         return 1;
1058 }
1059
1060 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1061                         struct msghdr *msg, size_t len)
1062 {
1063         struct sock *sk = sock->sk;
1064         struct rose_sock *rose = rose_sk(sk);
1065         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1066         int err;
1067         struct full_sockaddr_rose srose;
1068         struct sk_buff *skb;
1069         unsigned char *asmptr;
1070         int n, size, qbit = 0;
1071
1072         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1073                 return -EINVAL;
1074
1075         if (sock_flag(sk, SOCK_ZAPPED))
1076                 return -EADDRNOTAVAIL;
1077
1078         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1079                 send_sig(SIGPIPE, current, 0);
1080                 return -EPIPE;
1081         }
1082
1083         if (rose->neighbour == NULL || rose->device == NULL)
1084                 return -ENETUNREACH;
1085
1086         if (usrose != NULL) {
1087                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1088                         return -EINVAL;
1089                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1090                 memcpy(&srose, usrose, msg->msg_namelen);
1091                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1092                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1093                         return -EISCONN;
1094                 if (srose.srose_ndigis != rose->dest_ndigis)
1095                         return -EISCONN;
1096                 if (srose.srose_ndigis == rose->dest_ndigis) {
1097                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1098                                 if (ax25cmp(&rose->dest_digis[n],
1099                                             &srose.srose_digis[n]))
1100                                         return -EISCONN;
1101                 }
1102                 if (srose.srose_family != AF_ROSE)
1103                         return -EINVAL;
1104         } else {
1105                 if (sk->sk_state != TCP_ESTABLISHED)
1106                         return -ENOTCONN;
1107
1108                 srose.srose_family = AF_ROSE;
1109                 srose.srose_addr   = rose->dest_addr;
1110                 srose.srose_call   = rose->dest_call;
1111                 srose.srose_ndigis = rose->dest_ndigis;
1112                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1113                         srose.srose_digis[n] = rose->dest_digis[n];
1114         }
1115
1116         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1117
1118         /* Build a packet */
1119         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1120         /* Sanity check the packet size */
1121         if (len > 65535)
1122                 return -EMSGSIZE;
1123
1124         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1125
1126         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1127                 return err;
1128
1129         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1130
1131         /*
1132          *      Put the data on the end
1133          */
1134         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1135
1136         skb_reset_transport_header(skb);
1137         skb_put(skb, len);
1138
1139         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1140         if (err) {
1141                 kfree_skb(skb);
1142                 return err;
1143         }
1144
1145         /*
1146          *      If the Q BIT Include socket option is in force, the first
1147          *      byte of the user data is the logical value of the Q Bit.
1148          */
1149         if (rose->qbitincl) {
1150                 qbit = skb->data[0];
1151                 skb_pull(skb, 1);
1152         }
1153
1154         /*
1155          *      Push down the ROSE header
1156          */
1157         asmptr = skb_push(skb, ROSE_MIN_LEN);
1158
1159         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
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         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1170
1171         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1172
1173         if (sk->sk_state != TCP_ESTABLISHED) {
1174                 kfree_skb(skb);
1175                 return -ENOTCONN;
1176         }
1177
1178 #ifdef M_BIT
1179 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1180         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1181                 unsigned char header[ROSE_MIN_LEN];
1182                 struct sk_buff *skbn;
1183                 int frontlen;
1184                 int lg;
1185
1186                 /* Save a copy of the Header */
1187                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1188                 skb_pull(skb, ROSE_MIN_LEN);
1189
1190                 frontlen = skb_headroom(skb);
1191
1192                 while (skb->len > 0) {
1193                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1194                                 kfree_skb(skb);
1195                                 return err;
1196                         }
1197
1198                         skbn->sk   = sk;
1199                         skbn->free = 1;
1200                         skbn->arp  = 1;
1201
1202                         skb_reserve(skbn, frontlen);
1203
1204                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1205
1206                         /* Copy the user data */
1207                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1208                         skb_pull(skb, lg);
1209
1210                         /* Duplicate the Header */
1211                         skb_push(skbn, ROSE_MIN_LEN);
1212                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1213
1214                         if (skb->len > 0)
1215                                 skbn->data[2] |= M_BIT;
1216
1217                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1218                 }
1219
1220                 skb->free = 1;
1221                 kfree_skb(skb);
1222         } else {
1223                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1224         }
1225 #else
1226         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1227 #endif
1228
1229         rose_kick(sk);
1230
1231         return len;
1232 }
1233
1234
1235 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1236                         struct msghdr *msg, size_t size, int flags)
1237 {
1238         struct sock *sk = sock->sk;
1239         struct rose_sock *rose = rose_sk(sk);
1240         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1241         size_t copied;
1242         unsigned char *asmptr;
1243         struct sk_buff *skb;
1244         int n, er, qbit;
1245
1246         /*
1247          * This works for seqpacket too. The receiver has ordered the queue for
1248          * us! We do one quick check first though
1249          */
1250         if (sk->sk_state != TCP_ESTABLISHED)
1251                 return -ENOTCONN;
1252
1253         /* Now we can treat all alike */
1254         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1255                 return er;
1256
1257         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1258
1259         skb_pull(skb, ROSE_MIN_LEN);
1260
1261         if (rose->qbitincl) {
1262                 asmptr  = skb_push(skb, 1);
1263                 *asmptr = qbit;
1264         }
1265
1266         skb_reset_transport_header(skb);
1267         copied     = skb->len;
1268
1269         if (copied > size) {
1270                 copied = size;
1271                 msg->msg_flags |= MSG_TRUNC;
1272         }
1273
1274         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1275
1276         if (srose != NULL) {
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                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1282                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1283                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1284                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1285                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1286                 } else {
1287                         if (rose->dest_ndigis >= 1) {
1288                                 srose->srose_ndigis = 1;
1289                                 srose->srose_digi = rose->dest_digis[0];
1290                         }
1291                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1292                 }
1293         }
1294
1295         skb_free_datagram(sk, skb);
1296
1297         return copied;
1298 }
1299
1300
1301 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1302 {
1303         struct sock *sk = sock->sk;
1304         struct rose_sock *rose = rose_sk(sk);
1305         void __user *argp = (void __user *)arg;
1306
1307         switch (cmd) {
1308         case TIOCOUTQ: {
1309                 long amount;
1310
1311                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1312                 if (amount < 0)
1313                         amount = 0;
1314                 return put_user(amount, (unsigned int __user *) argp);
1315         }
1316
1317         case TIOCINQ: {
1318                 struct sk_buff *skb;
1319                 long amount = 0L;
1320                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1321                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1322                         amount = skb->len;
1323                 return put_user(amount, (unsigned int __user *) argp);
1324         }
1325
1326         case SIOCGSTAMP:
1327                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1328
1329         case SIOCGSTAMPNS:
1330                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1331
1332         case SIOCGIFADDR:
1333         case SIOCSIFADDR:
1334         case SIOCGIFDSTADDR:
1335         case SIOCSIFDSTADDR:
1336         case SIOCGIFBRDADDR:
1337         case SIOCSIFBRDADDR:
1338         case SIOCGIFNETMASK:
1339         case SIOCSIFNETMASK:
1340         case SIOCGIFMETRIC:
1341         case SIOCSIFMETRIC:
1342                 return -EINVAL;
1343
1344         case SIOCADDRT:
1345         case SIOCDELRT:
1346         case SIOCRSCLRRT:
1347                 if (!capable(CAP_NET_ADMIN))
1348                         return -EPERM;
1349                 return rose_rt_ioctl(cmd, argp);
1350
1351         case SIOCRSGCAUSE: {
1352                 struct rose_cause_struct rose_cause;
1353                 rose_cause.cause      = rose->cause;
1354                 rose_cause.diagnostic = rose->diagnostic;
1355                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1356         }
1357
1358         case SIOCRSSCAUSE: {
1359                 struct rose_cause_struct rose_cause;
1360                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1361                         return -EFAULT;
1362                 rose->cause      = rose_cause.cause;
1363                 rose->diagnostic = rose_cause.diagnostic;
1364                 return 0;
1365         }
1366
1367         case SIOCRSSL2CALL:
1368                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1369                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1370                         ax25_listen_release(&rose_callsign, NULL);
1371                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1372                         return -EFAULT;
1373                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1374                         return ax25_listen_register(&rose_callsign, NULL);
1375
1376                 return 0;
1377
1378         case SIOCRSGL2CALL:
1379                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1380
1381         case SIOCRSACCEPT:
1382                 if (rose->state == ROSE_STATE_5) {
1383                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1384                         rose_start_idletimer(sk);
1385                         rose->condition = 0x00;
1386                         rose->vs        = 0;
1387                         rose->va        = 0;
1388                         rose->vr        = 0;
1389                         rose->vl        = 0;
1390                         rose->state     = ROSE_STATE_3;
1391                 }
1392                 return 0;
1393
1394         default:
1395                 return -ENOIOCTLCMD;
1396         }
1397
1398         return 0;
1399 }
1400
1401 #ifdef CONFIG_PROC_FS
1402 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1403         __acquires(rose_list_lock)
1404 {
1405         int i;
1406         struct sock *s;
1407         struct hlist_node *node;
1408
1409         spin_lock_bh(&rose_list_lock);
1410         if (*pos == 0)
1411                 return SEQ_START_TOKEN;
1412
1413         i = 1;
1414         sk_for_each(s, node, &rose_list) {
1415                 if (i == *pos)
1416                         return s;
1417                 ++i;
1418         }
1419         return NULL;
1420 }
1421
1422 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1423 {
1424         ++*pos;
1425
1426         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1427                 : sk_next((struct sock *)v);
1428 }
1429
1430 static void rose_info_stop(struct seq_file *seq, void *v)
1431         __releases(rose_list_lock)
1432 {
1433         spin_unlock_bh(&rose_list_lock);
1434 }
1435
1436 static int rose_info_show(struct seq_file *seq, void *v)
1437 {
1438         char buf[11], rsbuf[11];
1439
1440         if (v == SEQ_START_TOKEN)
1441                 seq_puts(seq,
1442                          "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");
1443
1444         else {
1445                 struct sock *s = v;
1446                 struct rose_sock *rose = rose_sk(s);
1447                 const char *devname, *callsign;
1448                 const struct net_device *dev = rose->device;
1449
1450                 if (!dev)
1451                         devname = "???";
1452                 else
1453                         devname = dev->name;
1454
1455                 seq_printf(seq, "%-10s %-9s ",
1456                            rose2asc(rsbuf, &rose->dest_addr),
1457                            ax2asc(buf, &rose->dest_call));
1458
1459                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1460                         callsign = "??????-?";
1461                 else
1462                         callsign = ax2asc(buf, &rose->source_call);
1463
1464                 seq_printf(seq,
1465                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1466                         rose2asc(rsbuf, &rose->source_addr),
1467                         callsign,
1468                         devname,
1469                         rose->lci & 0x0FFF,
1470                         (rose->neighbour) ? rose->neighbour->number : 0,
1471                         rose->state,
1472                         rose->vs,
1473                         rose->vr,
1474                         rose->va,
1475                         ax25_display_timer(&rose->timer) / HZ,
1476                         rose->t1 / HZ,
1477                         rose->t2 / HZ,
1478                         rose->t3 / HZ,
1479                         rose->hb / HZ,
1480                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1481                         rose->idle / (60 * HZ),
1482                         sk_wmem_alloc_get(s),
1483                         sk_rmem_alloc_get(s),
1484                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1485         }
1486
1487         return 0;
1488 }
1489
1490 static const struct seq_operations rose_info_seqops = {
1491         .start = rose_info_start,
1492         .next = rose_info_next,
1493         .stop = rose_info_stop,
1494         .show = rose_info_show,
1495 };
1496
1497 static int rose_info_open(struct inode *inode, struct file *file)
1498 {
1499         return seq_open(file, &rose_info_seqops);
1500 }
1501
1502 static const struct file_operations rose_info_fops = {
1503         .owner = THIS_MODULE,
1504         .open = rose_info_open,
1505         .read = seq_read,
1506         .llseek = seq_lseek,
1507         .release = seq_release,
1508 };
1509 #endif  /* CONFIG_PROC_FS */
1510
1511 static struct net_proto_family rose_family_ops = {
1512         .family         =       PF_ROSE,
1513         .create         =       rose_create,
1514         .owner          =       THIS_MODULE,
1515 };
1516
1517 static struct proto_ops rose_proto_ops = {
1518         .family         =       PF_ROSE,
1519         .owner          =       THIS_MODULE,
1520         .release        =       rose_release,
1521         .bind           =       rose_bind,
1522         .connect        =       rose_connect,
1523         .socketpair     =       sock_no_socketpair,
1524         .accept         =       rose_accept,
1525         .getname        =       rose_getname,
1526         .poll           =       datagram_poll,
1527         .ioctl          =       rose_ioctl,
1528         .listen         =       rose_listen,
1529         .shutdown       =       sock_no_shutdown,
1530         .setsockopt     =       rose_setsockopt,
1531         .getsockopt     =       rose_getsockopt,
1532         .sendmsg        =       rose_sendmsg,
1533         .recvmsg        =       rose_recvmsg,
1534         .mmap           =       sock_no_mmap,
1535         .sendpage       =       sock_no_sendpage,
1536 };
1537
1538 static struct notifier_block rose_dev_notifier = {
1539         .notifier_call  =       rose_device_event,
1540 };
1541
1542 static struct net_device **dev_rose;
1543
1544 static struct ax25_protocol rose_pid = {
1545         .pid    = AX25_P_ROSE,
1546         .func   = rose_route_frame
1547 };
1548
1549 static struct ax25_linkfail rose_linkfail_notifier = {
1550         .func   = rose_link_failed
1551 };
1552
1553 static int __init rose_proto_init(void)
1554 {
1555         int i;
1556         int rc;
1557
1558         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1559                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1560                 rc = -EINVAL;
1561                 goto out;
1562         }
1563
1564         rc = proto_register(&rose_proto, 0);
1565         if (rc != 0)
1566                 goto out;
1567
1568         rose_callsign = null_ax25_address;
1569
1570         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1571         if (dev_rose == NULL) {
1572                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1573                 rc = -ENOMEM;
1574                 goto out_proto_unregister;
1575         }
1576
1577         for (i = 0; i < rose_ndevs; i++) {
1578                 struct net_device *dev;
1579                 char name[IFNAMSIZ];
1580
1581                 sprintf(name, "rose%d", i);
1582                 dev = alloc_netdev(0, name, rose_setup);
1583                 if (!dev) {
1584                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1585                         rc = -ENOMEM;
1586                         goto fail;
1587                 }
1588                 rc = register_netdev(dev);
1589                 if (rc) {
1590                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1591                         free_netdev(dev);
1592                         goto fail;
1593                 }
1594                 rose_set_lockdep_key(dev);
1595                 dev_rose[i] = dev;
1596         }
1597
1598         sock_register(&rose_family_ops);
1599         register_netdevice_notifier(&rose_dev_notifier);
1600
1601         ax25_register_pid(&rose_pid);
1602         ax25_linkfail_register(&rose_linkfail_notifier);
1603
1604 #ifdef CONFIG_SYSCTL
1605         rose_register_sysctl();
1606 #endif
1607         rose_loopback_init();
1608
1609         rose_add_loopback_neigh();
1610
1611         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1612         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1613         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1614         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1615 out:
1616         return rc;
1617 fail:
1618         while (--i >= 0) {
1619                 unregister_netdev(dev_rose[i]);
1620                 free_netdev(dev_rose[i]);
1621         }
1622         kfree(dev_rose);
1623 out_proto_unregister:
1624         proto_unregister(&rose_proto);
1625         goto out;
1626 }
1627 module_init(rose_proto_init);
1628
1629 module_param(rose_ndevs, int, 0);
1630 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1631
1632 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1633 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1634 MODULE_LICENSE("GPL");
1635 MODULE_ALIAS_NETPROTO(PF_ROSE);
1636
1637 static void __exit rose_exit(void)
1638 {
1639         int i;
1640
1641         proc_net_remove(&init_net, "rose");
1642         proc_net_remove(&init_net, "rose_neigh");
1643         proc_net_remove(&init_net, "rose_nodes");
1644         proc_net_remove(&init_net, "rose_routes");
1645         rose_loopback_clear();
1646
1647         rose_rt_free();
1648
1649         ax25_protocol_release(AX25_P_ROSE);
1650         ax25_linkfail_release(&rose_linkfail_notifier);
1651
1652         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1653                 ax25_listen_release(&rose_callsign, NULL);
1654
1655 #ifdef CONFIG_SYSCTL
1656         rose_unregister_sysctl();
1657 #endif
1658         unregister_netdevice_notifier(&rose_dev_notifier);
1659
1660         sock_unregister(PF_ROSE);
1661
1662         for (i = 0; i < rose_ndevs; i++) {
1663                 struct net_device *dev = dev_rose[i];
1664
1665                 if (dev) {
1666                         unregister_netdev(dev);
1667                         free_netdev(dev);
1668                 }
1669         }
1670
1671         kfree(dev_rose);
1672         proto_unregister(&rose_proto);
1673 }
1674
1675 module_exit(rose_exit);