net/rose/af_rose.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *
   4  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   5  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   6  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
   7  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
   8  */
   9
  10 #include <linux/capability.h>
  11 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/init.h>
  14 #include <linux/errno.h>
  15 #include <linux/types.h>
  16 #include <linux/socket.h>
  17 #include <linux/in.h>
  18 #include <linux/slab.h>
  19 #include <linux/kernel.h>
  20 #include <linux/sched/signal.h>
  21 #include <linux/spinlock.h>
  22 #include <linux/timer.h>
  23 #include <linux/string.h>
  24 #include <linux/sockios.h>
  25 #include <linux/net.h>
  26 #include <linux/stat.h>
  27 #include <net/net_namespace.h>
  28 #include <net/ax25.h>
  29 #include <linux/inet.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/if_arp.h>
  32 #include <linux/skbuff.h>
  33 #include <net/sock.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/termios.h>
  37 #include <linux/mm.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/notifier.h>
  40 #include <net/rose.h>
  41 #include <linux/proc_fs.h>
  42 #include <linux/seq_file.h>
  43 #include <net/tcp_states.h>
  44 #include <net/ip.h>
  45 #include <net/arp.h>
  46
  47 static int rose_ndevs = 10;
  48
  49 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  50 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  51 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  52 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  53 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  54 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  55 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  56 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  57 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  58 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  59
  60 static HLIST_HEAD(rose_list);
  61 static DEFINE_SPINLOCK(rose_list_lock);
  62
  63 static const struct proto_ops rose_proto_ops;
  64
  65 ax25_address rose_callsign;
  66
  67 /*
  68  * ROSE network devices are virtual network devices encapsulating ROSE
  69  * frames into AX.25 which will be sent through an AX.25 device, so form a
  70  * special "super class" of normal net devices; split their locks off into a
  71  * separate class since they always nest.
  72  */
  73 static struct lock_class_key rose_netdev_xmit_lock_key;
  74 static struct lock_class_key rose_netdev_addr_lock_key;
  75
  76 static void rose_set_lockdep_one(struct net_device *dev,
  77                                  struct netdev_queue *txq,
  78                                  void *_unused)
  79 {
  80         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
  81 }
  82
  83 static void rose_set_lockdep_key(struct net_device *dev)
  84 {
  85         lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
  86         netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
  87 }
  88
  89 /*
  90  *      Convert a ROSE address into text.
  91  */
  92 char *rose2asc(char *buf, const rose_address *addr)
  93 {
  94         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  95             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  96             addr->rose_addr[4] == 0x00) {
  97                 strcpy(buf, "*");
  98         } else {
  99                 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 100                                                 addr->rose_addr[1] & 0xFF,
 101                                                 addr->rose_addr[2] & 0xFF,
 102                                                 addr->rose_addr[3] & 0xFF,
 103                                                 addr->rose_addr[4] & 0xFF);
 104         }
 105
 106         return buf;
 107 }
 108
 109 /*
 110  *      Compare two ROSE addresses, 0 == equal.
 111  */
 112 int rosecmp(rose_address *addr1, rose_address *addr2)
 113 {
 114         int i;
 115
 116         for (i = 0; i < 5; i++)
 117                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 118                         return 1;
 119
 120         return 0;
 121 }
 122
 123 /*
 124  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 125  */
 126 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 127 {
 128         unsigned int i, j;
 129
 130         if (mask > 10)
 131                 return 1;
 132
 133         for (i = 0; i < mask; i++) {
 134                 j = i / 2;
 135
 136                 if ((i % 2) != 0) {
 137                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 138                                 return 1;
 139                 } else {
 140                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 141                                 return 1;
 142                 }
 143         }
 144
 145         return 0;
 146 }
 147
 148 /*
 149  *      Socket removal during an interrupt is now safe.
 150  */
 151 static void rose_remove_socket(struct sock *sk)
 152 {
 153         spin_lock_bh(&rose_list_lock);
 154         sk_del_node_init(sk);
 155         spin_unlock_bh(&rose_list_lock);
 156 }
 157
 158 /*
 159  *      Kill all bound sockets on a broken link layer connection to a
 160  *      particular neighbour.
 161  */
 162 void rose_kill_by_neigh(struct rose_neigh *neigh)
 163 {
 164         struct sock *s;
 165
 166         spin_lock_bh(&rose_list_lock);
 167         sk_for_each(s, &rose_list) {
 168                 struct rose_sock *rose = rose_sk(s);
 169
 170                 if (rose->neighbour == neigh) {
 171                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 172                         rose->neighbour->use--;
 173                         rose->neighbour = NULL;
 174                 }
 175         }
 176         spin_unlock_bh(&rose_list_lock);
 177 }
 178
 179 /*
 180  *      Kill all bound sockets on a dropped device.
 181  */
 182 static void rose_kill_by_device(struct net_device *dev)
 183 {
 184         struct sock *s;
 185
 186         spin_lock_bh(&rose_list_lock);
 187         sk_for_each(s, &rose_list) {
 188                 struct rose_sock *rose = rose_sk(s);
 189
 190                 if (rose->device == dev) {
 191                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 192                         if (rose->neighbour)
 193                                 rose->neighbour->use--;
 194                         rose->device = NULL;
 195                 }
 196         }
 197         spin_unlock_bh(&rose_list_lock);
 198 }
 199
 200 /*
 201  *      Handle device status changes.
 202  */
 203 static int rose_device_event(struct notifier_block *this,
 204                              unsigned long event, void *ptr)
 205 {
 206         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 207
 208         if (!net_eq(dev_net(dev), &init_net))
 209                 return NOTIFY_DONE;
 210
 211         if (event != NETDEV_DOWN)
 212                 return NOTIFY_DONE;
 213
 214         switch (dev->type) {
 215         case ARPHRD_ROSE:
 216                 rose_kill_by_device(dev);
 217                 break;
 218         case ARPHRD_AX25:
 219                 rose_link_device_down(dev);
 220                 rose_rt_device_down(dev);
 221                 break;
 222         }
 223
 224         return NOTIFY_DONE;
 225 }
 226
 227 /*
 228  *      Add a socket to the bound sockets list.
 229  */
 230 static void rose_insert_socket(struct sock *sk)
 231 {
 232
 233         spin_lock_bh(&rose_list_lock);
 234         sk_add_node(sk, &rose_list);
 235         spin_unlock_bh(&rose_list_lock);
 236 }
 237
 238 /*
 239  *      Find a socket that wants to accept the Call Request we just
 240  *      received.
 241  */
 242 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 243 {
 244         struct sock *s;
 245
 246         spin_lock_bh(&rose_list_lock);
 247         sk_for_each(s, &rose_list) {
 248                 struct rose_sock *rose = rose_sk(s);
 249
 250                 if (!rosecmp(&rose->source_addr, addr) &&
 251                     !ax25cmp(&rose->source_call, call) &&
 252                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 253                         goto found;
 254         }
 255
 256         sk_for_each(s, &rose_list) {
 257                 struct rose_sock *rose = rose_sk(s);
 258
 259                 if (!rosecmp(&rose->source_addr, addr) &&
 260                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 261                     s->sk_state == TCP_LISTEN)
 262                         goto found;
 263         }
 264         s = NULL;
 265 found:
 266         spin_unlock_bh(&rose_list_lock);
 267         return s;
 268 }
 269
 270 /*
 271  *      Find a connected ROSE socket given my LCI and device.
 272  */
 273 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 274 {
 275         struct sock *s;
 276
 277         spin_lock_bh(&rose_list_lock);
 278         sk_for_each(s, &rose_list) {
 279                 struct rose_sock *rose = rose_sk(s);
 280
 281                 if (rose->lci == lci && rose->neighbour == neigh)
 282                         goto found;
 283         }
 284         s = NULL;
 285 found:
 286         spin_unlock_bh(&rose_list_lock);
 287         return s;
 288 }
 289
 290 /*
 291  *      Find a unique LCI for a given device.
 292  */
 293 unsigned int rose_new_lci(struct rose_neigh *neigh)
 294 {
 295         int lci;
 296
 297         if (neigh->dce_mode) {
 298                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 299                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 300                                 return lci;
 301         } else {
 302                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 303                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 304                                 return lci;
 305         }
 306
 307         return 0;
 308 }
 309
 310 /*
 311  *      Deferred destroy.
 312  */
 313 void rose_destroy_socket(struct sock *);
 314
 315 /*
 316  *      Handler for deferred kills.
 317  */
 318 static void rose_destroy_timer(struct timer_list *t)
 319 {
 320         struct sock *sk = from_timer(sk, t, sk_timer);
 321
 322         rose_destroy_socket(sk);
 323 }
 324
 325 /*
 326  *      This is called from user mode and the timers. Thus it protects itself
 327  *      against interrupt users but doesn't worry about being called during
 328  *      work.  Once it is removed from the queue no interrupt or bottom half
 329  *      will touch it and we are (fairly 8-) ) safe.
 330  */
 331 void rose_destroy_socket(struct sock *sk)
 332 {
 333         struct sk_buff *skb;
 334
 335         rose_remove_socket(sk);
 336         rose_stop_heartbeat(sk);
 337         rose_stop_idletimer(sk);
 338         rose_stop_timer(sk);
 339
 340         rose_clear_queues(sk);          /* Flush the queues */
 341
 342         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 343                 if (skb->sk != sk) {    /* A pending connection */
 344                         /* Queue the unaccepted socket for death */
 345                         sock_set_flag(skb->sk, SOCK_DEAD);
 346                         rose_start_heartbeat(skb->sk);
 347                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 348                 }
 349
 350                 kfree_skb(skb);
 351         }
 352
 353         if (sk_has_allocations(sk)) {
 354                 /* Defer: outstanding buffers */
 355                 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
 356                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 357                 add_timer(&sk->sk_timer);
 358         } else
 359                 sock_put(sk);
 360 }
 361
 362 /*
 363  *      Handling for system calls applied via the various interfaces to a
 364  *      ROSE socket object.
 365  */
 366
 367 static int rose_setsockopt(struct socket *sock, int level, int optname,
 368                 sockptr_t optval, unsigned int optlen)
 369 {
 370         struct sock *sk = sock->sk;
 371         struct rose_sock *rose = rose_sk(sk);
 372         int opt;
 373
 374         if (level != SOL_ROSE)
 375                 return -ENOPROTOOPT;
 376
 377         if (optlen < sizeof(int))
 378                 return -EINVAL;
 379
 380         if (copy_from_sockptr(&opt, optval, sizeof(int)))
 381                 return -EFAULT;
 382
 383         switch (optname) {
 384         case ROSE_DEFER:
 385                 rose->defer = opt ? 1 : 0;
 386                 return 0;
 387
 388         case ROSE_T1:
 389                 if (opt < 1)
 390                         return -EINVAL;
 391                 rose->t1 = opt * HZ;
 392                 return 0;
 393
 394         case ROSE_T2:
 395                 if (opt < 1)
 396                         return -EINVAL;
 397                 rose->t2 = opt * HZ;
 398                 return 0;
 399
 400         case ROSE_T3:
 401                 if (opt < 1)
 402                         return -EINVAL;
 403                 rose->t3 = opt * HZ;
 404                 return 0;
 405
 406         case ROSE_HOLDBACK:
 407                 if (opt < 1)
 408                         return -EINVAL;
 409                 rose->hb = opt * HZ;
 410                 return 0;
 411
 412         case ROSE_IDLE:
 413                 if (opt < 0)
 414                         return -EINVAL;
 415                 rose->idle = opt * 60 * HZ;
 416                 return 0;
 417
 418         case ROSE_QBITINCL:
 419                 rose->qbitincl = opt ? 1 : 0;
 420                 return 0;
 421
 422         default:
 423                 return -ENOPROTOOPT;
 424         }
 425 }
 426
 427 static int rose_getsockopt(struct socket *sock, int level, int optname,
 428         char __user *optval, int __user *optlen)
 429 {
 430         struct sock *sk = sock->sk;
 431         struct rose_sock *rose = rose_sk(sk);
 432         int val = 0;
 433         int len;
 434
 435         if (level != SOL_ROSE)
 436                 return -ENOPROTOOPT;
 437
 438         if (get_user(len, optlen))
 439                 return -EFAULT;
 440
 441         if (len < 0)
 442                 return -EINVAL;
 443
 444         switch (optname) {
 445         case ROSE_DEFER:
 446                 val = rose->defer;
 447                 break;
 448
 449         case ROSE_T1:
 450                 val = rose->t1 / HZ;
 451                 break;
 452
 453         case ROSE_T2:
 454                 val = rose->t2 / HZ;
 455                 break;
 456
 457         case ROSE_T3:
 458                 val = rose->t3 / HZ;
 459                 break;
 460
 461         case ROSE_HOLDBACK:
 462                 val = rose->hb / HZ;
 463                 break;
 464
 465         case ROSE_IDLE:
 466                 val = rose->idle / (60 * HZ);
 467                 break;
 468
 469         case ROSE_QBITINCL:
 470                 val = rose->qbitincl;
 471                 break;
 472
 473         default:
 474                 return -ENOPROTOOPT;
 475         }
 476
 477         len = min_t(unsigned int, len, sizeof(int));
 478
 479         if (put_user(len, optlen))
 480                 return -EFAULT;
 481
 482         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 483 }
 484
 485 static int rose_listen(struct socket *sock, int backlog)
 486 {
 487         struct sock *sk = sock->sk;
 488
 489         if (sk->sk_state != TCP_LISTEN) {
 490                 struct rose_sock *rose = rose_sk(sk);
 491
 492                 rose->dest_ndigis = 0;
 493                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 494                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 495                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 496                 sk->sk_max_ack_backlog = backlog;
 497                 sk->sk_state           = TCP_LISTEN;
 498                 return 0;
 499         }
 500
 501         return -EOPNOTSUPP;
 502 }
 503
 504 static struct proto rose_proto = {
 505         .name     = "ROSE",
 506         .owner    = THIS_MODULE,
 507         .obj_size = sizeof(struct rose_sock),
 508 };
 509
 510 static int rose_create(struct net *net, struct socket *sock, int protocol,
 511                        int kern)
 512 {
 513         struct sock *sk;
 514         struct rose_sock *rose;
 515
 516         if (!net_eq(net, &init_net))
 517                 return -EAFNOSUPPORT;
 518
 519         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 520                 return -ESOCKTNOSUPPORT;
 521
 522         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
 523         if (sk == NULL)
 524                 return -ENOMEM;
 525
 526         rose = rose_sk(sk);
 527
 528         sock_init_data(sock, sk);
 529
 530         skb_queue_head_init(&rose->ack_queue);
 531 #ifdef M_BIT
 532         skb_queue_head_init(&rose->frag_queue);
 533         rose->fraglen    = 0;
 534 #endif
 535
 536         sock->ops    = &rose_proto_ops;
 537         sk->sk_protocol = protocol;
 538
 539         timer_setup(&rose->timer, NULL, 0);
 540         timer_setup(&rose->idletimer, NULL, 0);
 541
 542         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 543         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 544         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 545         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 546         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 547
 548         rose->state = ROSE_STATE_0;
 549
 550         return 0;
 551 }
 552
 553 static struct sock *rose_make_new(struct sock *osk)
 554 {
 555         struct sock *sk;
 556         struct rose_sock *rose, *orose;
 557
 558         if (osk->sk_type != SOCK_SEQPACKET)
 559                 return NULL;
 560
 561         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
 562         if (sk == NULL)
 563                 return NULL;
 564
 565         rose = rose_sk(sk);
 566
 567         sock_init_data(NULL, sk);
 568
 569         skb_queue_head_init(&rose->ack_queue);
 570 #ifdef M_BIT
 571         skb_queue_head_init(&rose->frag_queue);
 572         rose->fraglen  = 0;
 573 #endif
 574
 575         sk->sk_type     = osk->sk_type;
 576         sk->sk_priority = osk->sk_priority;
 577         sk->sk_protocol = osk->sk_protocol;
 578         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 579         sk->sk_sndbuf   = osk->sk_sndbuf;
 580         sk->sk_state    = TCP_ESTABLISHED;
 581         sock_copy_flags(sk, osk);
 582
 583         timer_setup(&rose->timer, NULL, 0);
 584         timer_setup(&rose->idletimer, NULL, 0);
 585
 586         orose           = rose_sk(osk);
 587         rose->t1        = orose->t1;
 588         rose->t2        = orose->t2;
 589         rose->t3        = orose->t3;
 590         rose->hb        = orose->hb;
 591         rose->idle      = orose->idle;
 592         rose->defer     = orose->defer;
 593         rose->device    = orose->device;
 594         rose->qbitincl  = orose->qbitincl;
 595
 596         return sk;
 597 }
 598
 599 static int rose_release(struct socket *sock)
 600 {
 601         struct sock *sk = sock->sk;
 602         struct rose_sock *rose;
 603
 604         if (sk == NULL) return 0;
 605
 606         sock_hold(sk);
 607         sock_orphan(sk);
 608         lock_sock(sk);
 609         rose = rose_sk(sk);
 610
 611         switch (rose->state) {
 612         case ROSE_STATE_0:
 613                 release_sock(sk);
 614                 rose_disconnect(sk, 0, -1, -1);
 615                 lock_sock(sk);
 616                 rose_destroy_socket(sk);
 617                 break;
 618
 619         case ROSE_STATE_2:
 620                 rose->neighbour->use--;
 621                 release_sock(sk);
 622                 rose_disconnect(sk, 0, -1, -1);
 623                 lock_sock(sk);
 624                 rose_destroy_socket(sk);
 625                 break;
 626
 627         case ROSE_STATE_1:
 628         case ROSE_STATE_3:
 629         case ROSE_STATE_4:
 630         case ROSE_STATE_5:
 631                 rose_clear_queues(sk);
 632                 rose_stop_idletimer(sk);
 633                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 634                 rose_start_t3timer(sk);
 635                 rose->state  = ROSE_STATE_2;
 636                 sk->sk_state    = TCP_CLOSE;
 637                 sk->sk_shutdown |= SEND_SHUTDOWN;
 638                 sk->sk_state_change(sk);
 639                 sock_set_flag(sk, SOCK_DEAD);
 640                 sock_set_flag(sk, SOCK_DESTROY);
 641                 break;
 642
 643         default:
 644                 break;
 645         }
 646
 647         sock->sk = NULL;
 648         release_sock(sk);
 649         sock_put(sk);
 650
 651         return 0;
 652 }
 653
 654 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 655 {
 656         struct sock *sk = sock->sk;
 657         struct rose_sock *rose = rose_sk(sk);
 658         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 659         struct net_device *dev;
 660         ax25_address *source;
 661         ax25_uid_assoc *user;
 662         int n;
 663
 664         if (!sock_flag(sk, SOCK_ZAPPED))
 665                 return -EINVAL;
 666
 667         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 668                 return -EINVAL;
 669
 670         if (addr->srose_family != AF_ROSE)
 671                 return -EINVAL;
 672
 673         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 674                 return -EINVAL;
 675
 676         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 677                 return -EINVAL;
 678
 679         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
 680                 return -EADDRNOTAVAIL;
 681
 682         source = &addr->srose_call;
 683
 684         user = ax25_findbyuid(current_euid());
 685         if (user) {
 686                 rose->source_call = user->call;
 687                 ax25_uid_put(user);
 688         } else {
 689                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
 690                         dev_put(dev);
 691                         return -EACCES;
 692                 }
 693                 rose->source_call   = *source;
 694         }
 695
 696         rose->source_addr   = addr->srose_addr;
 697         rose->device        = dev;
 698         rose->source_ndigis = addr->srose_ndigis;
 699
 700         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 701                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 702                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 703                         rose->source_digis[n] = full_addr->srose_digis[n];
 704         } else {
 705                 if (rose->source_ndigis == 1) {
 706                         rose->source_digis[0] = addr->srose_digi;
 707                 }
 708         }
 709
 710         rose_insert_socket(sk);
 711
 712         sock_reset_flag(sk, SOCK_ZAPPED);
 713
 714         return 0;
 715 }
 716
 717 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 718 {
 719         struct sock *sk = sock->sk;
 720         struct rose_sock *rose = rose_sk(sk);
 721         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 722         unsigned char cause, diagnostic;
 723         struct net_device *dev;
 724         ax25_uid_assoc *user;
 725         int n, err = 0;
 726
 727         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 728                 return -EINVAL;
 729
 730         if (addr->srose_family != AF_ROSE)
 731                 return -EINVAL;
 732
 733         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 734                 return -EINVAL;
 735
 736         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 737                 return -EINVAL;
 738
 739         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 740         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 741                 return -EINVAL;
 742
 743         lock_sock(sk);
 744
 745         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 746                 /* Connect completed during a ERESTARTSYS event */
 747                 sock->state = SS_CONNECTED;
 748                 goto out_release;
 749         }
 750
 751         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 752                 sock->state = SS_UNCONNECTED;
 753                 err = -ECONNREFUSED;
 754                 goto out_release;
 755         }
 756
 757         if (sk->sk_state == TCP_ESTABLISHED) {
 758                 /* No reconnect on a seqpacket socket */
 759                 err = -EISCONN;
 760                 goto out_release;
 761         }
 762
 763         sk->sk_state   = TCP_CLOSE;
 764         sock->state = SS_UNCONNECTED;
 765
 766         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 767                                          &diagnostic, 0);
 768         if (!rose->neighbour) {
 769                 err = -ENETUNREACH;
 770                 goto out_release;
 771         }
 772
 773         rose->lci = rose_new_lci(rose->neighbour);
 774         if (!rose->lci) {
 775                 err = -ENETUNREACH;
 776                 goto out_release;
 777         }
 778
 779         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 780                 sock_reset_flag(sk, SOCK_ZAPPED);
 781
 782                 if ((dev = rose_dev_first()) == NULL) {
 783                         err = -ENETUNREACH;
 784                         goto out_release;
 785                 }
 786
 787                 user = ax25_findbyuid(current_euid());
 788                 if (!user) {
 789                         err = -EINVAL;
 790                         goto out_release;
 791                 }
 792
 793                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 794                 rose->source_call = user->call;
 795                 rose->device      = dev;
 796                 ax25_uid_put(user);
 797
 798                 rose_insert_socket(sk);         /* Finish the bind */
 799         }
 800         rose->dest_addr   = addr->srose_addr;
 801         rose->dest_call   = addr->srose_call;
 802         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 803         rose->dest_ndigis = addr->srose_ndigis;
 804
 805         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 806                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 807                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 808                         rose->dest_digis[n] = full_addr->srose_digis[n];
 809         } else {
 810                 if (rose->dest_ndigis == 1) {
 811                         rose->dest_digis[0] = addr->srose_digi;
 812                 }
 813         }
 814
 815         /* Move to connecting socket, start sending Connect Requests */
 816         sock->state   = SS_CONNECTING;
 817         sk->sk_state     = TCP_SYN_SENT;
 818
 819         rose->state = ROSE_STATE_1;
 820
 821         rose->neighbour->use++;
 822
 823         rose_write_internal(sk, ROSE_CALL_REQUEST);
 824         rose_start_heartbeat(sk);
 825         rose_start_t1timer(sk);
 826
 827         /* Now the loop */
 828         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 829                 err = -EINPROGRESS;
 830                 goto out_release;
 831         }
 832
 833         /*
 834          * A Connect Ack with Choke or timeout or failed routing will go to
 835          * closed.
 836          */
 837         if (sk->sk_state == TCP_SYN_SENT) {
 838                 DEFINE_WAIT(wait);
 839
 840                 for (;;) {
 841                         prepare_to_wait(sk_sleep(sk), &wait,
 842                                         TASK_INTERRUPTIBLE);
 843                         if (sk->sk_state != TCP_SYN_SENT)
 844                                 break;
 845                         if (!signal_pending(current)) {
 846                                 release_sock(sk);
 847                                 schedule();
 848                                 lock_sock(sk);
 849                                 continue;
 850                         }
 851                         err = -ERESTARTSYS;
 852                         break;
 853                 }
 854                 finish_wait(sk_sleep(sk), &wait);
 855
 856                 if (err)
 857                         goto out_release;
 858         }
 859
 860         if (sk->sk_state != TCP_ESTABLISHED) {
 861                 sock->state = SS_UNCONNECTED;
 862                 err = sock_error(sk);   /* Always set at this point */
 863                 goto out_release;
 864         }
 865
 866         sock->state = SS_CONNECTED;
 867
 868 out_release:
 869         release_sock(sk);
 870
 871         return err;
 872 }
 873
 874 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
 875                        bool kern)
 876 {
 877         struct sk_buff *skb;
 878         struct sock *newsk;
 879         DEFINE_WAIT(wait);
 880         struct sock *sk;
 881         int err = 0;
 882
 883         if ((sk = sock->sk) == NULL)
 884                 return -EINVAL;
 885
 886         lock_sock(sk);
 887         if (sk->sk_type != SOCK_SEQPACKET) {
 888                 err = -EOPNOTSUPP;
 889                 goto out_release;
 890         }
 891
 892         if (sk->sk_state != TCP_LISTEN) {
 893                 err = -EINVAL;
 894                 goto out_release;
 895         }
 896
 897         /*
 898          *      The write queue this time is holding sockets ready to use
 899          *      hooked into the SABM we saved
 900          */
 901         for (;;) {
 902                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 903
 904                 skb = skb_dequeue(&sk->sk_receive_queue);
 905                 if (skb)
 906                         break;
 907
 908                 if (flags & O_NONBLOCK) {
 909                         err = -EWOULDBLOCK;
 910                         break;
 911                 }
 912                 if (!signal_pending(current)) {
 913                         release_sock(sk);
 914                         schedule();
 915                         lock_sock(sk);
 916                         continue;
 917                 }
 918                 err = -ERESTARTSYS;
 919                 break;
 920         }
 921         finish_wait(sk_sleep(sk), &wait);
 922         if (err)
 923                 goto out_release;
 924
 925         newsk = skb->sk;
 926         sock_graft(newsk, newsock);
 927
 928         /* Now attach up the new socket */
 929         skb->sk = NULL;
 930         kfree_skb(skb);
 931         sk_acceptq_removed(sk);
 932
 933 out_release:
 934         release_sock(sk);
 935
 936         return err;
 937 }
 938
 939 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 940         int peer)
 941 {
 942         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 943         struct sock *sk = sock->sk;
 944         struct rose_sock *rose = rose_sk(sk);
 945         int n;
 946
 947         memset(srose, 0, sizeof(*srose));
 948         if (peer != 0) {
 949                 if (sk->sk_state != TCP_ESTABLISHED)
 950                         return -ENOTCONN;
 951                 srose->srose_family = AF_ROSE;
 952                 srose->srose_addr   = rose->dest_addr;
 953                 srose->srose_call   = rose->dest_call;
 954                 srose->srose_ndigis = rose->dest_ndigis;
 955                 for (n = 0; n < rose->dest_ndigis; n++)
 956                         srose->srose_digis[n] = rose->dest_digis[n];
 957         } else {
 958                 srose->srose_family = AF_ROSE;
 959                 srose->srose_addr   = rose->source_addr;
 960                 srose->srose_call   = rose->source_call;
 961                 srose->srose_ndigis = rose->source_ndigis;
 962                 for (n = 0; n < rose->source_ndigis; n++)
 963                         srose->srose_digis[n] = rose->source_digis[n];
 964         }
 965
 966         return sizeof(struct full_sockaddr_rose);
 967 }
 968
 969 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 970 {
 971         struct sock *sk;
 972         struct sock *make;
 973         struct rose_sock *make_rose;
 974         struct rose_facilities_struct facilities;
 975         int n;
 976
 977         skb->sk = NULL;         /* Initially we don't know who it's for */
 978
 979         /*
 980          *      skb->data points to the rose frame start
 981          */
 982         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 983
 984         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
 985                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
 986                                    &facilities)) {
 987                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 988                 return 0;
 989         }
 990
 991         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 992
 993         /*
 994          * We can't accept the Call Request.
 995          */
 996         if (sk == NULL || sk_acceptq_is_full(sk) ||
 997             (make = rose_make_new(sk)) == NULL) {
 998                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 999                 return 0;
1000         }
1001
1002         skb->sk     = make;
1003         make->sk_state = TCP_ESTABLISHED;
1004         make_rose = rose_sk(make);
1005
1006         make_rose->lci           = lci;
1007         make_rose->dest_addr     = facilities.dest_addr;
1008         make_rose->dest_call     = facilities.dest_call;
1009         make_rose->dest_ndigis   = facilities.dest_ndigis;
1010         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1011                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1012         make_rose->source_addr   = facilities.source_addr;
1013         make_rose->source_call   = facilities.source_call;
1014         make_rose->source_ndigis = facilities.source_ndigis;
1015         for (n = 0 ; n < facilities.source_ndigis ; n++)
1016                 make_rose->source_digis[n] = facilities.source_digis[n];
1017         make_rose->neighbour     = neigh;
1018         make_rose->device        = dev;
1019         make_rose->facilities    = facilities;
1020
1021         make_rose->neighbour->use++;
1022
1023         if (rose_sk(sk)->defer) {
1024                 make_rose->state = ROSE_STATE_5;
1025         } else {
1026                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1027                 make_rose->state = ROSE_STATE_3;
1028                 rose_start_idletimer(make);
1029         }
1030
1031         make_rose->condition = 0x00;
1032         make_rose->vs        = 0;
1033         make_rose->va        = 0;
1034         make_rose->vr        = 0;
1035         make_rose->vl        = 0;
1036         sk_acceptq_added(sk);
1037
1038         rose_insert_socket(make);
1039
1040         skb_queue_head(&sk->sk_receive_queue, skb);
1041
1042         rose_start_heartbeat(make);
1043
1044         if (!sock_flag(sk, SOCK_DEAD))
1045                 sk->sk_data_ready(sk);
1046
1047         return 1;
1048 }
1049
1050 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1051 {
1052         struct sock *sk = sock->sk;
1053         struct rose_sock *rose = rose_sk(sk);
1054         DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1055         int err;
1056         struct full_sockaddr_rose srose;
1057         struct sk_buff *skb;
1058         unsigned char *asmptr;
1059         int n, size, qbit = 0;
1060
1061         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1062                 return -EINVAL;
1063
1064         if (sock_flag(sk, SOCK_ZAPPED))
1065                 return -EADDRNOTAVAIL;
1066
1067         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1068                 send_sig(SIGPIPE, current, 0);
1069                 return -EPIPE;
1070         }
1071
1072         if (rose->neighbour == NULL || rose->device == NULL)
1073                 return -ENETUNREACH;
1074
1075         if (usrose != NULL) {
1076                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1077                         return -EINVAL;
1078                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1079                 memcpy(&srose, usrose, msg->msg_namelen);
1080                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1081                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1082                         return -EISCONN;
1083                 if (srose.srose_ndigis != rose->dest_ndigis)
1084                         return -EISCONN;
1085                 if (srose.srose_ndigis == rose->dest_ndigis) {
1086                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1087                                 if (ax25cmp(&rose->dest_digis[n],
1088                                             &srose.srose_digis[n]))
1089                                         return -EISCONN;
1090                 }
1091                 if (srose.srose_family != AF_ROSE)
1092                         return -EINVAL;
1093         } else {
1094                 if (sk->sk_state != TCP_ESTABLISHED)
1095                         return -ENOTCONN;
1096
1097                 srose.srose_family = AF_ROSE;
1098                 srose.srose_addr   = rose->dest_addr;
1099                 srose.srose_call   = rose->dest_call;
1100                 srose.srose_ndigis = rose->dest_ndigis;
1101                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1102                         srose.srose_digis[n] = rose->dest_digis[n];
1103         }
1104
1105         /* Build a packet */
1106         /* Sanity check the packet size */
1107         if (len > 65535)
1108                 return -EMSGSIZE;
1109
1110         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1111
1112         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1113                 return err;
1114
1115         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1116
1117         /*
1118          *      Put the data on the end
1119          */
1120
1121         skb_reset_transport_header(skb);
1122         skb_put(skb, len);
1123
1124         err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1125         if (err) {
1126                 kfree_skb(skb);
1127                 return err;
1128         }
1129
1130         /*
1131          *      If the Q BIT Include socket option is in force, the first
1132          *      byte of the user data is the logical value of the Q Bit.
1133          */
1134         if (rose->qbitincl) {
1135                 qbit = skb->data[0];
1136                 skb_pull(skb, 1);
1137         }
1138
1139         /*
1140          *      Push down the ROSE header
1141          */
1142         asmptr = skb_push(skb, ROSE_MIN_LEN);
1143
1144         /* Build a ROSE Network header */
1145         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1146         asmptr[1] = (rose->lci >> 0) & 0xFF;
1147         asmptr[2] = ROSE_DATA;
1148
1149         if (qbit)
1150                 asmptr[0] |= ROSE_Q_BIT;
1151
1152         if (sk->sk_state != TCP_ESTABLISHED) {
1153                 kfree_skb(skb);
1154                 return -ENOTCONN;
1155         }
1156
1157 #ifdef M_BIT
1158 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1159         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1160                 unsigned char header[ROSE_MIN_LEN];
1161                 struct sk_buff *skbn;
1162                 int frontlen;
1163                 int lg;
1164
1165                 /* Save a copy of the Header */
1166                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1167                 skb_pull(skb, ROSE_MIN_LEN);
1168
1169                 frontlen = skb_headroom(skb);
1170
1171                 while (skb->len > 0) {
1172                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1173                                 kfree_skb(skb);
1174                                 return err;
1175                         }
1176
1177                         skbn->sk   = sk;
1178                         skbn->free = 1;
1179                         skbn->arp  = 1;
1180
1181                         skb_reserve(skbn, frontlen);
1182
1183                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1184
1185                         /* Copy the user data */
1186                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1187                         skb_pull(skb, lg);
1188
1189                         /* Duplicate the Header */
1190                         skb_push(skbn, ROSE_MIN_LEN);
1191                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1192
1193                         if (skb->len > 0)
1194                                 skbn->data[2] |= M_BIT;
1195
1196                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1197                 }
1198
1199                 skb->free = 1;
1200                 kfree_skb(skb);
1201         } else {
1202                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1203         }
1204 #else
1205         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1206 #endif
1207
1208         rose_kick(sk);
1209
1210         return len;
1211 }
1212
1213
1214 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1215                         int flags)
1216 {
1217         struct sock *sk = sock->sk;
1218         struct rose_sock *rose = rose_sk(sk);
1219         size_t copied;
1220         unsigned char *asmptr;
1221         struct sk_buff *skb;
1222         int n, er, qbit;
1223
1224         /*
1225          * This works for seqpacket too. The receiver has ordered the queue for
1226          * us! We do one quick check first though
1227          */
1228         if (sk->sk_state != TCP_ESTABLISHED)
1229                 return -ENOTCONN;
1230
1231         /* Now we can treat all alike */
1232         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233                 return er;
1234
1235         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1236
1237         skb_pull(skb, ROSE_MIN_LEN);
1238
1239         if (rose->qbitincl) {
1240                 asmptr  = skb_push(skb, 1);
1241                 *asmptr = qbit;
1242         }
1243
1244         skb_reset_transport_header(skb);
1245         copied     = skb->len;
1246
1247         if (copied > size) {
1248                 copied = size;
1249                 msg->msg_flags |= MSG_TRUNC;
1250         }
1251
1252         skb_copy_datagram_msg(skb, 0, msg, copied);
1253
1254         if (msg->msg_name) {
1255                 struct sockaddr_rose *srose;
1256                 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1257                                  msg->msg_name);
1258
1259                 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1260                 srose = msg->msg_name;
1261                 srose->srose_family = AF_ROSE;
1262                 srose->srose_addr   = rose->dest_addr;
1263                 srose->srose_call   = rose->dest_call;
1264                 srose->srose_ndigis = rose->dest_ndigis;
1265                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1266                         full_srose->srose_digis[n] = rose->dest_digis[n];
1267                 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1268         }
1269
1270         skb_free_datagram(sk, skb);
1271
1272         return copied;
1273 }
1274
1275
1276 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1277 {
1278         struct sock *sk = sock->sk;
1279         struct rose_sock *rose = rose_sk(sk);
1280         void __user *argp = (void __user *)arg;
1281
1282         switch (cmd) {
1283         case TIOCOUTQ: {
1284                 long amount;
1285
1286                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1287                 if (amount < 0)
1288                         amount = 0;
1289                 return put_user(amount, (unsigned int __user *) argp);
1290         }
1291
1292         case TIOCINQ: {
1293                 struct sk_buff *skb;
1294                 long amount = 0L;
1295                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1296                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1297                         amount = skb->len;
1298                 return put_user(amount, (unsigned int __user *) argp);
1299         }
1300
1301         case SIOCGIFADDR:
1302         case SIOCSIFADDR:
1303         case SIOCGIFDSTADDR:
1304         case SIOCSIFDSTADDR:
1305         case SIOCGIFBRDADDR:
1306         case SIOCSIFBRDADDR:
1307         case SIOCGIFNETMASK:
1308         case SIOCSIFNETMASK:
1309         case SIOCGIFMETRIC:
1310         case SIOCSIFMETRIC:
1311                 return -EINVAL;
1312
1313         case SIOCADDRT:
1314         case SIOCDELRT:
1315         case SIOCRSCLRRT:
1316                 if (!capable(CAP_NET_ADMIN))
1317                         return -EPERM;
1318                 return rose_rt_ioctl(cmd, argp);
1319
1320         case SIOCRSGCAUSE: {
1321                 struct rose_cause_struct rose_cause;
1322                 rose_cause.cause      = rose->cause;
1323                 rose_cause.diagnostic = rose->diagnostic;
1324                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1325         }
1326
1327         case SIOCRSSCAUSE: {
1328                 struct rose_cause_struct rose_cause;
1329                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1330                         return -EFAULT;
1331                 rose->cause      = rose_cause.cause;
1332                 rose->diagnostic = rose_cause.diagnostic;
1333                 return 0;
1334         }
1335
1336         case SIOCRSSL2CALL:
1337                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1338                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1339                         ax25_listen_release(&rose_callsign, NULL);
1340                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1341                         return -EFAULT;
1342                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1343                         return ax25_listen_register(&rose_callsign, NULL);
1344
1345                 return 0;
1346
1347         case SIOCRSGL2CALL:
1348                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1349
1350         case SIOCRSACCEPT:
1351                 if (rose->state == ROSE_STATE_5) {
1352                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1353                         rose_start_idletimer(sk);
1354                         rose->condition = 0x00;
1355                         rose->vs        = 0;
1356                         rose->va        = 0;
1357                         rose->vr        = 0;
1358                         rose->vl        = 0;
1359                         rose->state     = ROSE_STATE_3;
1360                 }
1361                 return 0;
1362
1363         default:
1364                 return -ENOIOCTLCMD;
1365         }
1366
1367         return 0;
1368 }
1369
1370 #ifdef CONFIG_PROC_FS
1371 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1372         __acquires(rose_list_lock)
1373 {
1374         spin_lock_bh(&rose_list_lock);
1375         return seq_hlist_start_head(&rose_list, *pos);
1376 }
1377
1378 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1379 {
1380         return seq_hlist_next(v, &rose_list, pos);
1381 }
1382
1383 static void rose_info_stop(struct seq_file *seq, void *v)
1384         __releases(rose_list_lock)
1385 {
1386         spin_unlock_bh(&rose_list_lock);
1387 }
1388
1389 static int rose_info_show(struct seq_file *seq, void *v)
1390 {
1391         char buf[11], rsbuf[11];
1392
1393         if (v == SEQ_START_TOKEN)
1394                 seq_puts(seq,
1395                          "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");
1396
1397         else {
1398                 struct sock *s = sk_entry(v);
1399                 struct rose_sock *rose = rose_sk(s);
1400                 const char *devname, *callsign;
1401                 const struct net_device *dev = rose->device;
1402
1403                 if (!dev)
1404                         devname = "???";
1405                 else
1406                         devname = dev->name;
1407
1408                 seq_printf(seq, "%-10s %-9s ",
1409                            rose2asc(rsbuf, &rose->dest_addr),
1410                            ax2asc(buf, &rose->dest_call));
1411
1412                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1413                         callsign = "??????-?";
1414                 else
1415                         callsign = ax2asc(buf, &rose->source_call);
1416
1417                 seq_printf(seq,
1418                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1419                         rose2asc(rsbuf, &rose->source_addr),
1420                         callsign,
1421                         devname,
1422                         rose->lci & 0x0FFF,
1423                         (rose->neighbour) ? rose->neighbour->number : 0,
1424                         rose->state,
1425                         rose->vs,
1426                         rose->vr,
1427                         rose->va,
1428                         ax25_display_timer(&rose->timer) / HZ,
1429                         rose->t1 / HZ,
1430                         rose->t2 / HZ,
1431                         rose->t3 / HZ,
1432                         rose->hb / HZ,
1433                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1434                         rose->idle / (60 * HZ),
1435                         sk_wmem_alloc_get(s),
1436                         sk_rmem_alloc_get(s),
1437                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1438         }
1439
1440         return 0;
1441 }
1442
1443 static const struct seq_operations rose_info_seqops = {
1444         .start = rose_info_start,
1445         .next = rose_info_next,
1446         .stop = rose_info_stop,
1447         .show = rose_info_show,
1448 };
1449 #endif  /* CONFIG_PROC_FS */
1450
1451 static const struct net_proto_family rose_family_ops = {
1452         .family         =       PF_ROSE,
1453         .create         =       rose_create,
1454         .owner          =       THIS_MODULE,
1455 };
1456
1457 static const struct proto_ops rose_proto_ops = {
1458         .family         =       PF_ROSE,
1459         .owner          =       THIS_MODULE,
1460         .release        =       rose_release,
1461         .bind           =       rose_bind,
1462         .connect        =       rose_connect,
1463         .socketpair     =       sock_no_socketpair,
1464         .accept         =       rose_accept,
1465         .getname        =       rose_getname,
1466         .poll           =       datagram_poll,
1467         .ioctl          =       rose_ioctl,
1468         .gettstamp      =       sock_gettstamp,
1469         .listen         =       rose_listen,
1470         .shutdown       =       sock_no_shutdown,
1471         .setsockopt     =       rose_setsockopt,
1472         .getsockopt     =       rose_getsockopt,
1473         .sendmsg        =       rose_sendmsg,
1474         .recvmsg        =       rose_recvmsg,
1475         .mmap           =       sock_no_mmap,
1476         .sendpage       =       sock_no_sendpage,
1477 };
1478
1479 static struct notifier_block rose_dev_notifier = {
1480         .notifier_call  =       rose_device_event,
1481 };
1482
1483 static struct net_device **dev_rose;
1484
1485 static struct ax25_protocol rose_pid = {
1486         .pid    = AX25_P_ROSE,
1487         .func   = rose_route_frame
1488 };
1489
1490 static struct ax25_linkfail rose_linkfail_notifier = {
1491         .func   = rose_link_failed
1492 };
1493
1494 static int __init rose_proto_init(void)
1495 {
1496         int i;
1497         int rc;
1498
1499         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1500                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1501                 rc = -EINVAL;
1502                 goto out;
1503         }
1504
1505         rc = proto_register(&rose_proto, 0);
1506         if (rc != 0)
1507                 goto out;
1508
1509         rose_callsign = null_ax25_address;
1510
1511         dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1512                            GFP_KERNEL);
1513         if (dev_rose == NULL) {
1514                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1515                 rc = -ENOMEM;
1516                 goto out_proto_unregister;
1517         }
1518
1519         for (i = 0; i < rose_ndevs; i++) {
1520                 struct net_device *dev;
1521                 char name[IFNAMSIZ];
1522
1523                 sprintf(name, "rose%d", i);
1524                 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1525                 if (!dev) {
1526                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1527                         rc = -ENOMEM;
1528                         goto fail;
1529                 }
1530                 rc = register_netdev(dev);
1531                 if (rc) {
1532                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1533                         free_netdev(dev);
1534                         goto fail;
1535                 }
1536                 rose_set_lockdep_key(dev);
1537                 dev_rose[i] = dev;
1538         }
1539
1540         sock_register(&rose_family_ops);
1541         register_netdevice_notifier(&rose_dev_notifier);
1542
1543         ax25_register_pid(&rose_pid);
1544         ax25_linkfail_register(&rose_linkfail_notifier);
1545
1546 #ifdef CONFIG_SYSCTL
1547         rose_register_sysctl();
1548 #endif
1549         rose_loopback_init();
1550
1551         rose_add_loopback_neigh();
1552
1553         proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1554         proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1555                     &rose_neigh_seqops);
1556         proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1557                     &rose_node_seqops);
1558         proc_create_seq("rose_routes", 0444, init_net.proc_net,
1559                     &rose_route_seqops);
1560 out:
1561         return rc;
1562 fail:
1563         while (--i >= 0) {
1564                 unregister_netdev(dev_rose[i]);
1565                 free_netdev(dev_rose[i]);
1566         }
1567         kfree(dev_rose);
1568 out_proto_unregister:
1569         proto_unregister(&rose_proto);
1570         goto out;
1571 }
1572 module_init(rose_proto_init);
1573
1574 module_param(rose_ndevs, int, 0);
1575 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1576
1577 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1578 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1579 MODULE_LICENSE("GPL");
1580 MODULE_ALIAS_NETPROTO(PF_ROSE);
1581
1582 static void __exit rose_exit(void)
1583 {
1584         int i;
1585
1586         remove_proc_entry("rose", init_net.proc_net);
1587         remove_proc_entry("rose_neigh", init_net.proc_net);
1588         remove_proc_entry("rose_nodes", init_net.proc_net);
1589         remove_proc_entry("rose_routes", init_net.proc_net);
1590         rose_loopback_clear();
1591
1592         rose_rt_free();
1593
1594         ax25_protocol_release(AX25_P_ROSE);
1595         ax25_linkfail_release(&rose_linkfail_notifier);
1596
1597         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1598                 ax25_listen_release(&rose_callsign, NULL);
1599
1600 #ifdef CONFIG_SYSCTL
1601         rose_unregister_sysctl();
1602 #endif
1603         unregister_netdevice_notifier(&rose_dev_notifier);
1604
1605         sock_unregister(PF_ROSE);
1606
1607         for (i = 0; i < rose_ndevs; i++) {
1608                 struct net_device *dev = dev_rose[i];
1609
1610                 if (dev) {
1611                         unregister_netdev(dev);
1612                         free_netdev(dev);
1613                 }
1614         }
1615
1616         kfree(dev_rose);
1617         proto_unregister(&rose_proto);
1618 }
1619
1620 module_exit(rose_exit);