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 const char *rose2asc(const rose_address *addr)
  96 {
  97         static char buffer[11];
  98
  99         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
 100             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
 101             addr->rose_addr[4] == 0x00) {
 102                 strcpy(buffer, "*");
 103         } else {
 104                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 105                                                 addr->rose_addr[1] & 0xFF,
 106                                                 addr->rose_addr[2] & 0xFF,
 107                                                 addr->rose_addr[3] & 0xFF,
 108                                                 addr->rose_addr[4] & 0xFF);
 109         }
 110
 111         return buffer;
 112 }
 113
 114 /*
 115  *      Compare two ROSE addresses, 0 == equal.
 116  */
 117 int rosecmp(rose_address *addr1, rose_address *addr2)
 118 {
 119         int i;
 120
 121         for (i = 0; i < 5; i++)
 122                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 123                         return 1;
 124
 125         return 0;
 126 }
 127
 128 /*
 129  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 130  */
 131 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 132 {
 133         unsigned int i, j;
 134
 135         if (mask > 10)
 136                 return 1;
 137
 138         for (i = 0; i < mask; i++) {
 139                 j = i / 2;
 140
 141                 if ((i % 2) != 0) {
 142                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 143                                 return 1;
 144                 } else {
 145                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 146                                 return 1;
 147                 }
 148         }
 149
 150         return 0;
 151 }
 152
 153 /*
 154  *      Socket removal during an interrupt is now safe.
 155  */
 156 static void rose_remove_socket(struct sock *sk)
 157 {
 158         spin_lock_bh(&rose_list_lock);
 159         sk_del_node_init(sk);
 160         spin_unlock_bh(&rose_list_lock);
 161 }
 162
 163 /*
 164  *      Kill all bound sockets on a broken link layer connection to a
 165  *      particular neighbour.
 166  */
 167 void rose_kill_by_neigh(struct rose_neigh *neigh)
 168 {
 169         struct sock *s;
 170         struct hlist_node *node;
 171
 172         spin_lock_bh(&rose_list_lock);
 173         sk_for_each(s, node, &rose_list) {
 174                 struct rose_sock *rose = rose_sk(s);
 175
 176                 if (rose->neighbour == neigh) {
 177                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 178                         rose->neighbour->use--;
 179                         rose->neighbour = NULL;
 180                 }
 181         }
 182         spin_unlock_bh(&rose_list_lock);
 183 }
 184
 185 /*
 186  *      Kill all bound sockets on a dropped device.
 187  */
 188 static void rose_kill_by_device(struct net_device *dev)
 189 {
 190         struct sock *s;
 191         struct hlist_node *node;
 192
 193         spin_lock_bh(&rose_list_lock);
 194         sk_for_each(s, node, &rose_list) {
 195                 struct rose_sock *rose = rose_sk(s);
 196
 197                 if (rose->device == dev) {
 198                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 199                         rose->neighbour->use--;
 200                         rose->device = NULL;
 201                 }
 202         }
 203         spin_unlock_bh(&rose_list_lock);
 204 }
 205
 206 /*
 207  *      Handle device status changes.
 208  */
 209 static int rose_device_event(struct notifier_block *this, unsigned long event,
 210         void *ptr)
 211 {
 212         struct net_device *dev = (struct net_device *)ptr;
 213
 214         if (!net_eq(dev_net(dev), &init_net))
 215                 return NOTIFY_DONE;
 216
 217         if (event != NETDEV_DOWN)
 218                 return NOTIFY_DONE;
 219
 220         switch (dev->type) {
 221         case ARPHRD_ROSE:
 222                 rose_kill_by_device(dev);
 223                 break;
 224         case ARPHRD_AX25:
 225                 rose_link_device_down(dev);
 226                 rose_rt_device_down(dev);
 227                 break;
 228         }
 229
 230         return NOTIFY_DONE;
 231 }
 232
 233 /*
 234  *      Add a socket to the bound sockets list.
 235  */
 236 static void rose_insert_socket(struct sock *sk)
 237 {
 238
 239         spin_lock_bh(&rose_list_lock);
 240         sk_add_node(sk, &rose_list);
 241         spin_unlock_bh(&rose_list_lock);
 242 }
 243
 244 /*
 245  *      Find a socket that wants to accept the Call Request we just
 246  *      received.
 247  */
 248 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 249 {
 250         struct sock *s;
 251         struct hlist_node *node;
 252
 253         spin_lock_bh(&rose_list_lock);
 254         sk_for_each(s, node, &rose_list) {
 255                 struct rose_sock *rose = rose_sk(s);
 256
 257                 if (!rosecmp(&rose->source_addr, addr) &&
 258                     !ax25cmp(&rose->source_call, call) &&
 259                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 260                         goto found;
 261         }
 262
 263         sk_for_each(s, node, &rose_list) {
 264                 struct rose_sock *rose = rose_sk(s);
 265
 266                 if (!rosecmp(&rose->source_addr, addr) &&
 267                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 268                     s->sk_state == TCP_LISTEN)
 269                         goto found;
 270         }
 271         s = NULL;
 272 found:
 273         spin_unlock_bh(&rose_list_lock);
 274         return s;
 275 }
 276
 277 /*
 278  *      Find a connected ROSE socket given my LCI and device.
 279  */
 280 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 281 {
 282         struct sock *s;
 283         struct hlist_node *node;
 284
 285         spin_lock_bh(&rose_list_lock);
 286         sk_for_each(s, node, &rose_list) {
 287                 struct rose_sock *rose = rose_sk(s);
 288
 289                 if (rose->lci == lci && rose->neighbour == neigh)
 290                         goto found;
 291         }
 292         s = NULL;
 293 found:
 294         spin_unlock_bh(&rose_list_lock);
 295         return s;
 296 }
 297
 298 /*
 299  *      Find a unique LCI for a given device.
 300  */
 301 unsigned int rose_new_lci(struct rose_neigh *neigh)
 302 {
 303         int lci;
 304
 305         if (neigh->dce_mode) {
 306                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 307                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 308                                 return lci;
 309         } else {
 310                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 311                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 312                                 return lci;
 313         }
 314
 315         return 0;
 316 }
 317
 318 /*
 319  *      Deferred destroy.
 320  */
 321 void rose_destroy_socket(struct sock *);
 322
 323 /*
 324  *      Handler for deferred kills.
 325  */
 326 static void rose_destroy_timer(unsigned long data)
 327 {
 328         rose_destroy_socket((struct sock *)data);
 329 }
 330
 331 /*
 332  *      This is called from user mode and the timers. Thus it protects itself
 333  *      against interrupt users but doesn't worry about being called during
 334  *      work.  Once it is removed from the queue no interrupt or bottom half
 335  *      will touch it and we are (fairly 8-) ) safe.
 336  */
 337 void rose_destroy_socket(struct sock *sk)
 338 {
 339         struct sk_buff *skb;
 340
 341         rose_remove_socket(sk);
 342         rose_stop_heartbeat(sk);
 343         rose_stop_idletimer(sk);
 344         rose_stop_timer(sk);
 345
 346         rose_clear_queues(sk);          /* Flush the queues */
 347
 348         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 349                 if (skb->sk != sk) {    /* A pending connection */
 350                         /* Queue the unaccepted socket for death */
 351                         sock_set_flag(skb->sk, SOCK_DEAD);
 352                         rose_start_heartbeat(skb->sk);
 353                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 354                 }
 355
 356                 kfree_skb(skb);
 357         }
 358
 359         if (atomic_read(&sk->sk_wmem_alloc) ||
 360             atomic_read(&sk->sk_rmem_alloc)) {
 361                 /* Defer: outstanding buffers */
 362                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 363                                 (unsigned long)sk);
 364                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 365                 add_timer(&sk->sk_timer);
 366         } else
 367                 sock_put(sk);
 368 }
 369
 370 /*
 371  *      Handling for system calls applied via the various interfaces to a
 372  *      ROSE socket object.
 373  */
 374
 375 static int rose_setsockopt(struct socket *sock, int level, int optname,
 376         char __user *optval, int optlen)
 377 {
 378         struct sock *sk = sock->sk;
 379         struct rose_sock *rose = rose_sk(sk);
 380         int opt;
 381
 382         if (level != SOL_ROSE)
 383                 return -ENOPROTOOPT;
 384
 385         if (optlen < sizeof(int))
 386                 return -EINVAL;
 387
 388         if (get_user(opt, (int __user *)optval))
 389                 return -EFAULT;
 390
 391         switch (optname) {
 392         case ROSE_DEFER:
 393                 rose->defer = opt ? 1 : 0;
 394                 return 0;
 395
 396         case ROSE_T1:
 397                 if (opt < 1)
 398                         return -EINVAL;
 399                 rose->t1 = opt * HZ;
 400                 return 0;
 401
 402         case ROSE_T2:
 403                 if (opt < 1)
 404                         return -EINVAL;
 405                 rose->t2 = opt * HZ;
 406                 return 0;
 407
 408         case ROSE_T3:
 409                 if (opt < 1)
 410                         return -EINVAL;
 411                 rose->t3 = opt * HZ;
 412                 return 0;
 413
 414         case ROSE_HOLDBACK:
 415                 if (opt < 1)
 416                         return -EINVAL;
 417                 rose->hb = opt * HZ;
 418                 return 0;
 419
 420         case ROSE_IDLE:
 421                 if (opt < 0)
 422                         return -EINVAL;
 423                 rose->idle = opt * 60 * HZ;
 424                 return 0;
 425
 426         case ROSE_QBITINCL:
 427                 rose->qbitincl = opt ? 1 : 0;
 428                 return 0;
 429
 430         default:
 431                 return -ENOPROTOOPT;
 432         }
 433 }
 434
 435 static int rose_getsockopt(struct socket *sock, int level, int optname,
 436         char __user *optval, int __user *optlen)
 437 {
 438         struct sock *sk = sock->sk;
 439         struct rose_sock *rose = rose_sk(sk);
 440         int val = 0;
 441         int len;
 442
 443         if (level != SOL_ROSE)
 444                 return -ENOPROTOOPT;
 445
 446         if (get_user(len, optlen))
 447                 return -EFAULT;
 448
 449         if (len < 0)
 450                 return -EINVAL;
 451
 452         switch (optname) {
 453         case ROSE_DEFER:
 454                 val = rose->defer;
 455                 break;
 456
 457         case ROSE_T1:
 458                 val = rose->t1 / HZ;
 459                 break;
 460
 461         case ROSE_T2:
 462                 val = rose->t2 / HZ;
 463                 break;
 464
 465         case ROSE_T3:
 466                 val = rose->t3 / HZ;
 467                 break;
 468
 469         case ROSE_HOLDBACK:
 470                 val = rose->hb / HZ;
 471                 break;
 472
 473         case ROSE_IDLE:
 474                 val = rose->idle / (60 * HZ);
 475                 break;
 476
 477         case ROSE_QBITINCL:
 478                 val = rose->qbitincl;
 479                 break;
 480
 481         default:
 482                 return -ENOPROTOOPT;
 483         }
 484
 485         len = min_t(unsigned int, len, sizeof(int));
 486
 487         if (put_user(len, optlen))
 488                 return -EFAULT;
 489
 490         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 491 }
 492
 493 static int rose_listen(struct socket *sock, int backlog)
 494 {
 495         struct sock *sk = sock->sk;
 496
 497         if (sk->sk_state != TCP_LISTEN) {
 498                 struct rose_sock *rose = rose_sk(sk);
 499
 500                 rose->dest_ndigis = 0;
 501                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 502                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 503                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 504                 sk->sk_max_ack_backlog = backlog;
 505                 sk->sk_state           = TCP_LISTEN;
 506                 return 0;
 507         }
 508
 509         return -EOPNOTSUPP;
 510 }
 511
 512 static struct proto rose_proto = {
 513         .name     = "ROSE",
 514         .owner    = THIS_MODULE,
 515         .obj_size = sizeof(struct rose_sock),
 516 };
 517
 518 static int rose_create(struct net *net, struct socket *sock, int protocol)
 519 {
 520         struct sock *sk;
 521         struct rose_sock *rose;
 522
 523         if (net != &init_net)
 524                 return -EAFNOSUPPORT;
 525
 526         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 527                 return -ESOCKTNOSUPPORT;
 528
 529         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 530         if (sk == NULL)
 531                 return -ENOMEM;
 532
 533         rose = rose_sk(sk);
 534
 535         sock_init_data(sock, sk);
 536
 537         skb_queue_head_init(&rose->ack_queue);
 538 #ifdef M_BIT
 539         skb_queue_head_init(&rose->frag_queue);
 540         rose->fraglen    = 0;
 541 #endif
 542
 543         sock->ops    = &rose_proto_ops;
 544         sk->sk_protocol = protocol;
 545
 546         init_timer(&rose->timer);
 547         init_timer(&rose->idletimer);
 548
 549         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 550         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 551         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 552         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 553         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 554
 555         rose->state = ROSE_STATE_0;
 556
 557         return 0;
 558 }
 559
 560 static struct sock *rose_make_new(struct sock *osk)
 561 {
 562         struct sock *sk;
 563         struct rose_sock *rose, *orose;
 564
 565         if (osk->sk_type != SOCK_SEQPACKET)
 566                 return NULL;
 567
 568         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
 569         if (sk == NULL)
 570                 return NULL;
 571
 572         rose = rose_sk(sk);
 573
 574         sock_init_data(NULL, sk);
 575
 576         skb_queue_head_init(&rose->ack_queue);
 577 #ifdef M_BIT
 578         skb_queue_head_init(&rose->frag_queue);
 579         rose->fraglen  = 0;
 580 #endif
 581
 582         sk->sk_type     = osk->sk_type;
 583         sk->sk_priority = osk->sk_priority;
 584         sk->sk_protocol = osk->sk_protocol;
 585         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 586         sk->sk_sndbuf   = osk->sk_sndbuf;
 587         sk->sk_state    = TCP_ESTABLISHED;
 588         sock_copy_flags(sk, osk);
 589
 590         init_timer(&rose->timer);
 591         init_timer(&rose->idletimer);
 592
 593         orose           = rose_sk(osk);
 594         rose->t1        = orose->t1;
 595         rose->t2        = orose->t2;
 596         rose->t3        = orose->t3;
 597         rose->hb        = orose->hb;
 598         rose->idle      = orose->idle;
 599         rose->defer     = orose->defer;
 600         rose->device    = orose->device;
 601         rose->qbitincl  = orose->qbitincl;
 602
 603         return sk;
 604 }
 605
 606 static int rose_release(struct socket *sock)
 607 {
 608         struct sock *sk = sock->sk;
 609         struct rose_sock *rose;
 610
 611         if (sk == NULL) return 0;
 612
 613         sock_hold(sk);
 614         sock_orphan(sk);
 615         lock_sock(sk);
 616         rose = rose_sk(sk);
 617
 618         switch (rose->state) {
 619         case ROSE_STATE_0:
 620                 release_sock(sk);
 621                 rose_disconnect(sk, 0, -1, -1);
 622                 lock_sock(sk);
 623                 rose_destroy_socket(sk);
 624                 break;
 625
 626         case ROSE_STATE_2:
 627                 rose->neighbour->use--;
 628                 release_sock(sk);
 629                 rose_disconnect(sk, 0, -1, -1);
 630                 lock_sock(sk);
 631                 rose_destroy_socket(sk);
 632                 break;
 633
 634         case ROSE_STATE_1:
 635         case ROSE_STATE_3:
 636         case ROSE_STATE_4:
 637         case ROSE_STATE_5:
 638                 rose_clear_queues(sk);
 639                 rose_stop_idletimer(sk);
 640                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 641                 rose_start_t3timer(sk);
 642                 rose->state  = ROSE_STATE_2;
 643                 sk->sk_state    = TCP_CLOSE;
 644                 sk->sk_shutdown |= SEND_SHUTDOWN;
 645                 sk->sk_state_change(sk);
 646                 sock_set_flag(sk, SOCK_DEAD);
 647                 sock_set_flag(sk, SOCK_DESTROY);
 648                 break;
 649
 650         default:
 651                 break;
 652         }
 653
 654         sock->sk = NULL;
 655         release_sock(sk);
 656         sock_put(sk);
 657
 658         return 0;
 659 }
 660
 661 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 662 {
 663         struct sock *sk = sock->sk;
 664         struct rose_sock *rose = rose_sk(sk);
 665         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 666         struct net_device *dev;
 667         ax25_address *source;
 668         ax25_uid_assoc *user;
 669         int n;
 670
 671         if (!sock_flag(sk, SOCK_ZAPPED))
 672                 return -EINVAL;
 673
 674         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 675                 return -EINVAL;
 676
 677         if (addr->srose_family != AF_ROSE)
 678                 return -EINVAL;
 679
 680         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 681                 return -EINVAL;
 682
 683         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 684                 return -EINVAL;
 685
 686         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 687                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 688                 return -EADDRNOTAVAIL;
 689         }
 690
 691         source = &addr->srose_call;
 692
 693         user = ax25_findbyuid(current_euid());
 694         if (user) {
 695                 rose->source_call = user->call;
 696                 ax25_uid_put(user);
 697         } else {
 698                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 699                         return -EACCES;
 700                 rose->source_call   = *source;
 701         }
 702
 703         rose->source_addr   = addr->srose_addr;
 704         rose->device        = dev;
 705         rose->source_ndigis = addr->srose_ndigis;
 706
 707         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 708                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 709                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 710                         rose->source_digis[n] = full_addr->srose_digis[n];
 711         } else {
 712                 if (rose->source_ndigis == 1) {
 713                         rose->source_digis[0] = addr->srose_digi;
 714                 }
 715         }
 716
 717         rose_insert_socket(sk);
 718
 719         sock_reset_flag(sk, SOCK_ZAPPED);
 720         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 721         return 0;
 722 }
 723
 724 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 725 {
 726         struct sock *sk = sock->sk;
 727         struct rose_sock *rose = rose_sk(sk);
 728         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 729         unsigned char cause, diagnostic;
 730         struct net_device *dev;
 731         ax25_uid_assoc *user;
 732         int n, err = 0;
 733
 734         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 735                 return -EINVAL;
 736
 737         if (addr->srose_family != AF_ROSE)
 738                 return -EINVAL;
 739
 740         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 741                 return -EINVAL;
 742
 743         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 744                 return -EINVAL;
 745
 746         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 747         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 748                 return -EINVAL;
 749
 750         lock_sock(sk);
 751
 752         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 753                 /* Connect completed during a ERESTARTSYS event */
 754                 sock->state = SS_CONNECTED;
 755                 goto out_release;
 756         }
 757
 758         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 759                 sock->state = SS_UNCONNECTED;
 760                 err = -ECONNREFUSED;
 761                 goto out_release;
 762         }
 763
 764         if (sk->sk_state == TCP_ESTABLISHED) {
 765                 /* No reconnect on a seqpacket socket */
 766                 err = -EISCONN;
 767                 goto out_release;
 768         }
 769
 770         sk->sk_state   = TCP_CLOSE;
 771         sock->state = SS_UNCONNECTED;
 772
 773         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 774                                          &diagnostic, 0);
 775         if (!rose->neighbour) {
 776                 err = -ENETUNREACH;
 777                 goto out_release;
 778         }
 779
 780         rose->lci = rose_new_lci(rose->neighbour);
 781         if (!rose->lci) {
 782                 err = -ENETUNREACH;
 783                 goto out_release;
 784         }
 785
 786         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 787                 sock_reset_flag(sk, SOCK_ZAPPED);
 788
 789                 if ((dev = rose_dev_first()) == NULL) {
 790                         err = -ENETUNREACH;
 791                         goto out_release;
 792                 }
 793
 794                 user = ax25_findbyuid(current_euid());
 795                 if (!user) {
 796                         err = -EINVAL;
 797                         goto out_release;
 798                 }
 799
 800                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 801                 rose->source_call = user->call;
 802                 rose->device      = dev;
 803                 ax25_uid_put(user);
 804
 805                 rose_insert_socket(sk);         /* Finish the bind */
 806         }
 807 rose_try_next_neigh:
 808         rose->dest_addr   = addr->srose_addr;
 809         rose->dest_call   = addr->srose_call;
 810         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 811         rose->dest_ndigis = addr->srose_ndigis;
 812
 813         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 814                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 815                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 816                         rose->dest_digis[n] = full_addr->srose_digis[n];
 817         } else {
 818                 if (rose->dest_ndigis == 1) {
 819                         rose->dest_digis[0] = addr->srose_digi;
 820                 }
 821         }
 822
 823         /* Move to connecting socket, start sending Connect Requests */
 824         sock->state   = SS_CONNECTING;
 825         sk->sk_state     = TCP_SYN_SENT;
 826
 827         rose->state = ROSE_STATE_1;
 828
 829         rose->neighbour->use++;
 830
 831         rose_write_internal(sk, ROSE_CALL_REQUEST);
 832         rose_start_heartbeat(sk);
 833         rose_start_t1timer(sk);
 834
 835         /* Now the loop */
 836         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 837                 err = -EINPROGRESS;
 838                 goto out_release;
 839         }
 840
 841         /*
 842          * A Connect Ack with Choke or timeout or failed routing will go to
 843          * closed.
 844          */
 845         if (sk->sk_state == TCP_SYN_SENT) {
 846                 DEFINE_WAIT(wait);
 847
 848                 for (;;) {
 849                         prepare_to_wait(sk->sk_sleep, &wait,
 850                                         TASK_INTERRUPTIBLE);
 851                         if (sk->sk_state != TCP_SYN_SENT)
 852                                 break;
 853                         if (!signal_pending(current)) {
 854                                 release_sock(sk);
 855                                 schedule();
 856                                 lock_sock(sk);
 857                                 continue;
 858                         }
 859                         err = -ERESTARTSYS;
 860                         break;
 861                 }
 862                 finish_wait(sk->sk_sleep, &wait);
 863
 864                 if (err)
 865                         goto out_release;
 866         }
 867
 868         if (sk->sk_state != TCP_ESTABLISHED) {
 869         /* Try next neighbour */
 870                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
 871                 if (rose->neighbour)
 872                         goto rose_try_next_neigh;
 873
 874                 /* No more neighbours */
 875                 sock->state = SS_UNCONNECTED;
 876                 err = sock_error(sk);   /* Always set at this point */
 877                 goto out_release;
 878         }
 879
 880         sock->state = SS_CONNECTED;
 881
 882 out_release:
 883         release_sock(sk);
 884
 885         return err;
 886 }
 887
 888 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 889 {
 890         struct sk_buff *skb;
 891         struct sock *newsk;
 892         DEFINE_WAIT(wait);
 893         struct sock *sk;
 894         int err = 0;
 895
 896         if ((sk = sock->sk) == NULL)
 897                 return -EINVAL;
 898
 899         lock_sock(sk);
 900         if (sk->sk_type != SOCK_SEQPACKET) {
 901                 err = -EOPNOTSUPP;
 902                 goto out_release;
 903         }
 904
 905         if (sk->sk_state != TCP_LISTEN) {
 906                 err = -EINVAL;
 907                 goto out_release;
 908         }
 909
 910         /*
 911          *      The write queue this time is holding sockets ready to use
 912          *      hooked into the SABM we saved
 913          */
 914         for (;;) {
 915                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 916
 917                 skb = skb_dequeue(&sk->sk_receive_queue);
 918                 if (skb)
 919                         break;
 920
 921                 if (flags & O_NONBLOCK) {
 922                         err = -EWOULDBLOCK;
 923                         break;
 924                 }
 925                 if (!signal_pending(current)) {
 926                         release_sock(sk);
 927                         schedule();
 928                         lock_sock(sk);
 929                         continue;
 930                 }
 931                 err = -ERESTARTSYS;
 932                 break;
 933         }
 934         finish_wait(sk->sk_sleep, &wait);
 935         if (err)
 936                 goto out_release;
 937
 938         newsk = skb->sk;
 939         sock_graft(newsk, newsock);
 940
 941         /* Now attach up the new socket */
 942         skb->sk = NULL;
 943         kfree_skb(skb);
 944         sk->sk_ack_backlog--;
 945
 946 out_release:
 947         release_sock(sk);
 948
 949         return err;
 950 }
 951
 952 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 953         int *uaddr_len, int peer)
 954 {
 955         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 956         struct sock *sk = sock->sk;
 957         struct rose_sock *rose = rose_sk(sk);
 958         int n;
 959
 960         if (peer != 0) {
 961                 if (sk->sk_state != TCP_ESTABLISHED)
 962                         return -ENOTCONN;
 963                 srose->srose_family = AF_ROSE;
 964                 srose->srose_addr   = rose->dest_addr;
 965                 srose->srose_call   = rose->dest_call;
 966                 srose->srose_ndigis = rose->dest_ndigis;
 967                 for (n = 0; n < rose->dest_ndigis; n++)
 968                         srose->srose_digis[n] = rose->dest_digis[n];
 969         } else {
 970                 srose->srose_family = AF_ROSE;
 971                 srose->srose_addr   = rose->source_addr;
 972                 srose->srose_call   = rose->source_call;
 973                 srose->srose_ndigis = rose->source_ndigis;
 974                 for (n = 0; n < rose->source_ndigis; n++)
 975                         srose->srose_digis[n] = rose->source_digis[n];
 976         }
 977
 978         *uaddr_len = sizeof(struct full_sockaddr_rose);
 979         return 0;
 980 }
 981
 982 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 983 {
 984         struct sock *sk;
 985         struct sock *make;
 986         struct rose_sock *make_rose;
 987         struct rose_facilities_struct facilities;
 988         int n, len;
 989
 990         skb->sk = NULL;         /* Initially we don't know who it's for */
 991
 992         /*
 993          *      skb->data points to the rose frame start
 994          */
 995         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 996
 997         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
 998         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
 999         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
1000                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1001                 return 0;
1002         }
1003
1004         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1005
1006         /*
1007          * We can't accept the Call Request.
1008          */
1009         if (sk == NULL || sk_acceptq_is_full(sk) ||
1010             (make = rose_make_new(sk)) == NULL) {
1011                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1012                 return 0;
1013         }
1014
1015         skb->sk     = make;
1016         make->sk_state = TCP_ESTABLISHED;
1017         make_rose = rose_sk(make);
1018
1019         make_rose->lci           = lci;
1020         make_rose->dest_addr     = facilities.dest_addr;
1021         make_rose->dest_call     = facilities.dest_call;
1022         make_rose->dest_ndigis   = facilities.dest_ndigis;
1023         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1024                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1025         make_rose->source_addr   = facilities.source_addr;
1026         make_rose->source_call   = facilities.source_call;
1027         make_rose->source_ndigis = facilities.source_ndigis;
1028         for (n = 0 ; n < facilities.source_ndigis ; n++)
1029                 make_rose->source_digis[n]= facilities.source_digis[n];
1030         make_rose->neighbour     = neigh;
1031         make_rose->device        = dev;
1032         make_rose->facilities    = facilities;
1033
1034         make_rose->neighbour->use++;
1035
1036         if (rose_sk(sk)->defer) {
1037                 make_rose->state = ROSE_STATE_5;
1038         } else {
1039                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1040                 make_rose->state = ROSE_STATE_3;
1041                 rose_start_idletimer(make);
1042         }
1043
1044         make_rose->condition = 0x00;
1045         make_rose->vs        = 0;
1046         make_rose->va        = 0;
1047         make_rose->vr        = 0;
1048         make_rose->vl        = 0;
1049         sk->sk_ack_backlog++;
1050
1051         rose_insert_socket(make);
1052
1053         skb_queue_head(&sk->sk_receive_queue, skb);
1054
1055         rose_start_heartbeat(make);
1056
1057         if (!sock_flag(sk, SOCK_DEAD))
1058                 sk->sk_data_ready(sk, skb->len);
1059
1060         return 1;
1061 }
1062
1063 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1064                         struct msghdr *msg, size_t len)
1065 {
1066         struct sock *sk = sock->sk;
1067         struct rose_sock *rose = rose_sk(sk);
1068         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1069         int err;
1070         struct full_sockaddr_rose srose;
1071         struct sk_buff *skb;
1072         unsigned char *asmptr;
1073         int n, size, qbit = 0;
1074
1075         /* ROSE empty frame has no meaning : don't send */
1076         if (len == 0)
1077                 return 0;
1078
1079         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1080                 return -EINVAL;
1081
1082         if (sock_flag(sk, SOCK_ZAPPED))
1083                 return -EADDRNOTAVAIL;
1084
1085         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1086                 send_sig(SIGPIPE, current, 0);
1087                 return -EPIPE;
1088         }
1089
1090         if (rose->neighbour == NULL || rose->device == NULL)
1091                 return -ENETUNREACH;
1092
1093         if (usrose != NULL) {
1094                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1095                         return -EINVAL;
1096                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1097                 memcpy(&srose, usrose, msg->msg_namelen);
1098                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1099                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1100                         return -EISCONN;
1101                 if (srose.srose_ndigis != rose->dest_ndigis)
1102                         return -EISCONN;
1103                 if (srose.srose_ndigis == rose->dest_ndigis) {
1104                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1105                                 if (ax25cmp(&rose->dest_digis[n],
1106                                             &srose.srose_digis[n]))
1107                                         return -EISCONN;
1108                 }
1109                 if (srose.srose_family != AF_ROSE)
1110                         return -EINVAL;
1111         } else {
1112                 if (sk->sk_state != TCP_ESTABLISHED)
1113                         return -ENOTCONN;
1114
1115                 srose.srose_family = AF_ROSE;
1116                 srose.srose_addr   = rose->dest_addr;
1117                 srose.srose_call   = rose->dest_call;
1118                 srose.srose_ndigis = rose->dest_ndigis;
1119                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1120                         srose.srose_digis[n] = rose->dest_digis[n];
1121         }
1122
1123         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1124
1125         /* Build a packet */
1126         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1127         /* Sanity check the packet size */
1128         if (len > 65535)
1129                 return -EMSGSIZE;
1130
1131         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1132
1133         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1134                 return err;
1135
1136         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1137
1138         /*
1139          *      Put the data on the end
1140          */
1141         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1142
1143         skb_reset_transport_header(skb);
1144         skb_put(skb, len);
1145
1146         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1147         if (err) {
1148                 kfree_skb(skb);
1149                 return err;
1150         }
1151
1152         /*
1153          *      If the Q BIT Include socket option is in force, the first
1154          *      byte of the user data is the logical value of the Q Bit.
1155          */
1156         if (rose->qbitincl) {
1157                 qbit = skb->data[0];
1158                 skb_pull(skb, 1);
1159         }
1160
1161         /*
1162          *      Push down the ROSE header
1163          */
1164         asmptr = skb_push(skb, ROSE_MIN_LEN);
1165
1166         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1167
1168         /* Build a ROSE Network header */
1169         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1170         asmptr[1] = (rose->lci >> 0) & 0xFF;
1171         asmptr[2] = ROSE_DATA;
1172
1173         if (qbit)
1174                 asmptr[0] |= ROSE_Q_BIT;
1175
1176         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1177
1178         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1179
1180         if (sk->sk_state != TCP_ESTABLISHED) {
1181                 kfree_skb(skb);
1182                 return -ENOTCONN;
1183         }
1184
1185 #ifdef M_BIT
1186 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1187         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1188                 unsigned char header[ROSE_MIN_LEN];
1189                 struct sk_buff *skbn;
1190                 int frontlen;
1191                 int lg;
1192
1193                 /* Save a copy of the Header */
1194                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1195                 skb_pull(skb, ROSE_MIN_LEN);
1196
1197                 frontlen = skb_headroom(skb);
1198
1199                 while (skb->len > 0) {
1200                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1201                                 kfree_skb(skb);
1202                                 return err;
1203                         }
1204
1205                         skbn->sk   = sk;
1206                         skbn->free = 1;
1207                         skbn->arp  = 1;
1208
1209                         skb_reserve(skbn, frontlen);
1210
1211                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1212
1213                         /* Copy the user data */
1214                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1215                         skb_pull(skb, lg);
1216
1217                         /* Duplicate the Header */
1218                         skb_push(skbn, ROSE_MIN_LEN);
1219                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1220
1221                         if (skb->len > 0)
1222                                 skbn->data[2] |= M_BIT;
1223
1224                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1225                 }
1226
1227                 skb->free = 1;
1228                 kfree_skb(skb);
1229         } else {
1230                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1231         }
1232 #else
1233         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1234 #endif
1235
1236         rose_kick(sk);
1237
1238         return len;
1239 }
1240
1241
1242 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1243                         struct msghdr *msg, size_t size, int flags)
1244 {
1245         struct sock *sk = sock->sk;
1246         struct rose_sock *rose = rose_sk(sk);
1247         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1248         size_t copied;
1249         unsigned char *asmptr;
1250         struct sk_buff *skb;
1251         int n, er, qbit;
1252
1253         /*
1254          * This works for seqpacket too. The receiver has ordered the queue for
1255          * us! We do one quick check first though
1256          */
1257         if (sk->sk_state != TCP_ESTABLISHED)
1258                 return -ENOTCONN;
1259
1260         /* Now we can treat all alike */
1261         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1262                 return er;
1263
1264         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1265
1266         skb_pull(skb, ROSE_MIN_LEN);
1267
1268         if (rose->qbitincl) {
1269                 asmptr  = skb_push(skb, 1);
1270                 *asmptr = qbit;
1271         }
1272
1273         skb_reset_transport_header(skb);
1274         copied     = skb->len;
1275
1276         /* ROSE empty frame has no meaning : ignore it */
1277         if (copied == 0) {
1278                 skb_free_datagram(sk, skb);
1279                 return copied;
1280         }
1281
1282         if (copied > size) {
1283                 copied = size;
1284                 msg->msg_flags |= MSG_TRUNC;
1285         }
1286
1287         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1288
1289         if (srose != NULL) {
1290                 srose->srose_family = AF_ROSE;
1291                 srose->srose_addr   = rose->dest_addr;
1292                 srose->srose_call   = rose->dest_call;
1293                 srose->srose_ndigis = rose->dest_ndigis;
1294                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1295                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1296                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1297                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1298                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1299                 } else {
1300                         if (rose->dest_ndigis >= 1) {
1301                                 srose->srose_ndigis = 1;
1302                                 srose->srose_digi = rose->dest_digis[0];
1303                         }
1304                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1305                 }
1306         }
1307
1308         skb_free_datagram(sk, skb);
1309
1310         return copied;
1311 }
1312
1313
1314 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1315 {
1316         struct sock *sk = sock->sk;
1317         struct rose_sock *rose = rose_sk(sk);
1318         void __user *argp = (void __user *)arg;
1319
1320         switch (cmd) {
1321         case TIOCOUTQ: {
1322                 long amount;
1323                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1324                 if (amount < 0)
1325                         amount = 0;
1326                 return put_user(amount, (unsigned int __user *) argp);
1327         }
1328
1329         case TIOCINQ: {
1330                 struct sk_buff *skb;
1331                 long amount = 0L;
1332                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1333                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1334                         amount = skb->len;
1335                 return put_user(amount, (unsigned int __user *) argp);
1336         }
1337
1338         case SIOCGSTAMP:
1339                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1340
1341         case SIOCGSTAMPNS:
1342                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1343
1344         case SIOCGIFADDR:
1345         case SIOCSIFADDR:
1346         case SIOCGIFDSTADDR:
1347         case SIOCSIFDSTADDR:
1348         case SIOCGIFBRDADDR:
1349         case SIOCSIFBRDADDR:
1350         case SIOCGIFNETMASK:
1351         case SIOCSIFNETMASK:
1352         case SIOCGIFMETRIC:
1353         case SIOCSIFMETRIC:
1354                 return -EINVAL;
1355
1356         case SIOCADDRT:
1357         case SIOCDELRT:
1358         case SIOCRSCLRRT:
1359                 if (!capable(CAP_NET_ADMIN))
1360                         return -EPERM;
1361                 return rose_rt_ioctl(cmd, argp);
1362
1363         case SIOCRSGCAUSE: {
1364                 struct rose_cause_struct rose_cause;
1365                 rose_cause.cause      = rose->cause;
1366                 rose_cause.diagnostic = rose->diagnostic;
1367                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1368         }
1369
1370         case SIOCRSSCAUSE: {
1371                 struct rose_cause_struct rose_cause;
1372                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1373                         return -EFAULT;
1374                 rose->cause      = rose_cause.cause;
1375                 rose->diagnostic = rose_cause.diagnostic;
1376                 return 0;
1377         }
1378
1379         case SIOCRSSL2CALL:
1380                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1381                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1382                         ax25_listen_release(&rose_callsign, NULL);
1383                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1384                         return -EFAULT;
1385                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1386                         return ax25_listen_register(&rose_callsign, NULL);
1387
1388                 return 0;
1389
1390         case SIOCRSGL2CALL:
1391                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1392
1393         case SIOCRSACCEPT:
1394                 if (rose->state == ROSE_STATE_5) {
1395                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1396                         rose_start_idletimer(sk);
1397                         rose->condition = 0x00;
1398                         rose->vs        = 0;
1399                         rose->va        = 0;
1400                         rose->vr        = 0;
1401                         rose->vl        = 0;
1402                         rose->state     = ROSE_STATE_3;
1403                 }
1404                 return 0;
1405
1406         default:
1407                 return -ENOIOCTLCMD;
1408         }
1409
1410         return 0;
1411 }
1412
1413 #ifdef CONFIG_PROC_FS
1414 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1415         __acquires(rose_list_lock)
1416 {
1417         int i;
1418         struct sock *s;
1419         struct hlist_node *node;
1420
1421         spin_lock_bh(&rose_list_lock);
1422         if (*pos == 0)
1423                 return SEQ_START_TOKEN;
1424
1425         i = 1;
1426         sk_for_each(s, node, &rose_list) {
1427                 if (i == *pos)
1428                         return s;
1429                 ++i;
1430         }
1431         return NULL;
1432 }
1433
1434 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1435 {
1436         ++*pos;
1437
1438         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1439                 : sk_next((struct sock *)v);
1440 }
1441
1442 static void rose_info_stop(struct seq_file *seq, void *v)
1443         __releases(rose_list_lock)
1444 {
1445         spin_unlock_bh(&rose_list_lock);
1446 }
1447
1448 static int rose_info_show(struct seq_file *seq, void *v)
1449 {
1450         char buf[11];
1451
1452         if (v == SEQ_START_TOKEN)
1453                 seq_puts(seq,
1454                          "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");
1455
1456         else {
1457                 struct sock *s = v;
1458                 struct rose_sock *rose = rose_sk(s);
1459                 const char *devname, *callsign;
1460                 const struct net_device *dev = rose->device;
1461
1462                 if (!dev)
1463                         devname = "???";
1464                 else
1465                         devname = dev->name;
1466
1467                 seq_printf(seq, "%-10s %-9s ",
1468                         rose2asc(&rose->dest_addr),
1469                         ax2asc(buf, &rose->dest_call));
1470
1471                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1472                         callsign = "??????-?";
1473                 else
1474                         callsign = ax2asc(buf, &rose->source_call);
1475
1476                 seq_printf(seq,
1477                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1478                         rose2asc(&rose->source_addr),
1479                         callsign,
1480                         devname,
1481                         rose->lci & 0x0FFF,
1482                         (rose->neighbour) ? rose->neighbour->number : 0,
1483                         rose->state,
1484                         rose->vs,
1485                         rose->vr,
1486                         rose->va,
1487                         ax25_display_timer(&rose->timer) / HZ,
1488                         rose->t1 / HZ,
1489                         rose->t2 / HZ,
1490                         rose->t3 / HZ,
1491                         rose->hb / HZ,
1492                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1493                         rose->idle / (60 * HZ),
1494                         atomic_read(&s->sk_wmem_alloc),
1495                         atomic_read(&s->sk_rmem_alloc),
1496                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1497         }
1498
1499         return 0;
1500 }
1501
1502 static const struct seq_operations rose_info_seqops = {
1503         .start = rose_info_start,
1504         .next = rose_info_next,
1505         .stop = rose_info_stop,
1506         .show = rose_info_show,
1507 };
1508
1509 static int rose_info_open(struct inode *inode, struct file *file)
1510 {
1511         return seq_open(file, &rose_info_seqops);
1512 }
1513
1514 static const struct file_operations rose_info_fops = {
1515         .owner = THIS_MODULE,
1516         .open = rose_info_open,
1517         .read = seq_read,
1518         .llseek = seq_lseek,
1519         .release = seq_release,
1520 };
1521 #endif  /* CONFIG_PROC_FS */
1522
1523 static struct net_proto_family rose_family_ops = {
1524         .family         =       PF_ROSE,
1525         .create         =       rose_create,
1526         .owner          =       THIS_MODULE,
1527 };
1528
1529 static struct proto_ops rose_proto_ops = {
1530         .family         =       PF_ROSE,
1531         .owner          =       THIS_MODULE,
1532         .release        =       rose_release,
1533         .bind           =       rose_bind,
1534         .connect        =       rose_connect,
1535         .socketpair     =       sock_no_socketpair,
1536         .accept         =       rose_accept,
1537         .getname        =       rose_getname,
1538         .poll           =       datagram_poll,
1539         .ioctl          =       rose_ioctl,
1540         .listen         =       rose_listen,
1541         .shutdown       =       sock_no_shutdown,
1542         .setsockopt     =       rose_setsockopt,
1543         .getsockopt     =       rose_getsockopt,
1544         .sendmsg        =       rose_sendmsg,
1545         .recvmsg        =       rose_recvmsg,
1546         .mmap           =       sock_no_mmap,
1547         .sendpage       =       sock_no_sendpage,
1548 };
1549
1550 static struct notifier_block rose_dev_notifier = {
1551         .notifier_call  =       rose_device_event,
1552 };
1553
1554 static struct net_device **dev_rose;
1555
1556 static struct ax25_protocol rose_pid = {
1557         .pid    = AX25_P_ROSE,
1558         .func   = rose_route_frame
1559 };
1560
1561 static struct ax25_linkfail rose_linkfail_notifier = {
1562         .func   = rose_link_failed
1563 };
1564
1565 static int __init rose_proto_init(void)
1566 {
1567         int i;
1568         int rc;
1569
1570         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1571                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1572                 rc = -EINVAL;
1573                 goto out;
1574         }
1575
1576         rc = proto_register(&rose_proto, 0);
1577         if (rc != 0)
1578                 goto out;
1579
1580         rose_callsign = null_ax25_address;
1581
1582         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1583         if (dev_rose == NULL) {
1584                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1585                 rc = -ENOMEM;
1586                 goto out_proto_unregister;
1587         }
1588
1589         for (i = 0; i < rose_ndevs; i++) {
1590                 struct net_device *dev;
1591                 char name[IFNAMSIZ];
1592
1593                 sprintf(name, "rose%d", i);
1594                 dev = alloc_netdev(0, name, rose_setup);
1595                 if (!dev) {
1596                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1597                         rc = -ENOMEM;
1598                         goto fail;
1599                 }
1600                 rc = register_netdev(dev);
1601                 if (rc) {
1602                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1603                         free_netdev(dev);
1604                         goto fail;
1605                 }
1606                 rose_set_lockdep_key(dev);
1607                 dev_rose[i] = dev;
1608         }
1609
1610         sock_register(&rose_family_ops);
1611         register_netdevice_notifier(&rose_dev_notifier);
1612
1613         ax25_register_pid(&rose_pid);
1614         ax25_linkfail_register(&rose_linkfail_notifier);
1615
1616 #ifdef CONFIG_SYSCTL
1617         rose_register_sysctl();
1618 #endif
1619         rose_loopback_init();
1620
1621         rose_add_loopback_neigh();
1622
1623         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1624         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1625         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1626         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1627 out:
1628         return rc;
1629 fail:
1630         while (--i >= 0) {
1631                 unregister_netdev(dev_rose[i]);
1632                 free_netdev(dev_rose[i]);
1633         }
1634         kfree(dev_rose);
1635 out_proto_unregister:
1636         proto_unregister(&rose_proto);
1637         goto out;
1638 }
1639 module_init(rose_proto_init);
1640
1641 module_param(rose_ndevs, int, 0);
1642 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1643
1644 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1645 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1646 MODULE_LICENSE("GPL");
1647 MODULE_ALIAS_NETPROTO(PF_ROSE);
1648
1649 static void __exit rose_exit(void)
1650 {
1651         int i;
1652
1653         proc_net_remove(&init_net, "rose");
1654         proc_net_remove(&init_net, "rose_neigh");
1655         proc_net_remove(&init_net, "rose_nodes");
1656         proc_net_remove(&init_net, "rose_routes");
1657         rose_loopback_clear();
1658
1659         rose_rt_free();
1660
1661         ax25_protocol_release(AX25_P_ROSE);
1662         ax25_linkfail_release(&rose_linkfail_notifier);
1663
1664         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1665                 ax25_listen_release(&rose_callsign, NULL);
1666
1667 #ifdef CONFIG_SYSCTL
1668         rose_unregister_sysctl();
1669 #endif
1670         unregister_netdevice_notifier(&rose_dev_notifier);
1671
1672         sock_unregister(PF_ROSE);
1673
1674         for (i = 0; i < rose_ndevs; i++) {
1675                 struct net_device *dev = dev_rose[i];
1676
1677                 if (dev) {
1678                         unregister_netdev(dev);
1679                         free_netdev(dev);
1680                 }
1681         }
1682
1683         kfree(dev_rose);
1684         proto_unregister(&rose_proto);
1685 }
1686
1687 module_exit(rose_exit);