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