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 *sk, *array[16];
 185         struct rose_sock *rose;
 186         bool rescan;
 187         int i, cnt;
 188
 189 start:
 190         rescan = false;
 191         cnt = 0;
 192         spin_lock_bh(&rose_list_lock);
 193         sk_for_each(sk, &rose_list) {
 194                 rose = rose_sk(sk);
 195                 if (rose->device == dev) {
 196                         if (cnt == ARRAY_SIZE(array)) {
 197                                 rescan = true;
 198                                 break;
 199                         }
 200                         sock_hold(sk);
 201                         array[cnt++] = sk;
 202                 }
 203         }
 204         spin_unlock_bh(&rose_list_lock);
 205
 206         for (i = 0; i < cnt; i++) {
 207                 sk = array[cnt];
 208                 rose = rose_sk(sk);
 209                 lock_sock(sk);
 210                 spin_lock_bh(&rose_list_lock);
 211                 if (rose->device == dev) {
 212                         rose_disconnect(sk, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 213                         if (rose->neighbour)
 214                                 rose->neighbour->use--;
 215                         dev_put(rose->device);
 216                         rose->device = NULL;
 217                 }
 218                 spin_unlock_bh(&rose_list_lock);
 219                 release_sock(sk);
 220                 sock_put(sk);
 221                 cond_resched();
 222         }
 223         if (rescan)
 224                 goto start;
 225 }
 226
 227 /*
 228  *      Handle device status changes.
 229  */
 230 static int rose_device_event(struct notifier_block *this,
 231                              unsigned long event, void *ptr)
 232 {
 233         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 234
 235         if (!net_eq(dev_net(dev), &init_net))
 236                 return NOTIFY_DONE;
 237
 238         if (event != NETDEV_DOWN)
 239                 return NOTIFY_DONE;
 240
 241         switch (dev->type) {
 242         case ARPHRD_ROSE:
 243                 rose_kill_by_device(dev);
 244                 break;
 245         case ARPHRD_AX25:
 246                 rose_link_device_down(dev);
 247                 rose_rt_device_down(dev);
 248                 break;
 249         }
 250
 251         return NOTIFY_DONE;
 252 }
 253
 254 /*
 255  *      Add a socket to the bound sockets list.
 256  */
 257 static void rose_insert_socket(struct sock *sk)
 258 {
 259
 260         spin_lock_bh(&rose_list_lock);
 261         sk_add_node(sk, &rose_list);
 262         spin_unlock_bh(&rose_list_lock);
 263 }
 264
 265 /*
 266  *      Find a socket that wants to accept the Call Request we just
 267  *      received.
 268  */
 269 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 270 {
 271         struct sock *s;
 272
 273         spin_lock_bh(&rose_list_lock);
 274         sk_for_each(s, &rose_list) {
 275                 struct rose_sock *rose = rose_sk(s);
 276
 277                 if (!rosecmp(&rose->source_addr, addr) &&
 278                     !ax25cmp(&rose->source_call, call) &&
 279                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 280                         goto found;
 281         }
 282
 283         sk_for_each(s, &rose_list) {
 284                 struct rose_sock *rose = rose_sk(s);
 285
 286                 if (!rosecmp(&rose->source_addr, addr) &&
 287                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 288                     s->sk_state == TCP_LISTEN)
 289                         goto found;
 290         }
 291         s = NULL;
 292 found:
 293         spin_unlock_bh(&rose_list_lock);
 294         return s;
 295 }
 296
 297 /*
 298  *      Find a connected ROSE socket given my LCI and device.
 299  */
 300 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 301 {
 302         struct sock *s;
 303
 304         spin_lock_bh(&rose_list_lock);
 305         sk_for_each(s, &rose_list) {
 306                 struct rose_sock *rose = rose_sk(s);
 307
 308                 if (rose->lci == lci && rose->neighbour == neigh)
 309                         goto found;
 310         }
 311         s = NULL;
 312 found:
 313         spin_unlock_bh(&rose_list_lock);
 314         return s;
 315 }
 316
 317 /*
 318  *      Find a unique LCI for a given device.
 319  */
 320 unsigned int rose_new_lci(struct rose_neigh *neigh)
 321 {
 322         int lci;
 323
 324         if (neigh->dce_mode) {
 325                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 326                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 327                                 return lci;
 328         } else {
 329                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 330                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 331                                 return lci;
 332         }
 333
 334         return 0;
 335 }
 336
 337 /*
 338  *      Deferred destroy.
 339  */
 340 void rose_destroy_socket(struct sock *);
 341
 342 /*
 343  *      Handler for deferred kills.
 344  */
 345 static void rose_destroy_timer(struct timer_list *t)
 346 {
 347         struct sock *sk = from_timer(sk, t, sk_timer);
 348
 349         rose_destroy_socket(sk);
 350 }
 351
 352 /*
 353  *      This is called from user mode and the timers. Thus it protects itself
 354  *      against interrupt users but doesn't worry about being called during
 355  *      work.  Once it is removed from the queue no interrupt or bottom half
 356  *      will touch it and we are (fairly 8-) ) safe.
 357  */
 358 void rose_destroy_socket(struct sock *sk)
 359 {
 360         struct sk_buff *skb;
 361
 362         rose_remove_socket(sk);
 363         rose_stop_heartbeat(sk);
 364         rose_stop_idletimer(sk);
 365         rose_stop_timer(sk);
 366
 367         rose_clear_queues(sk);          /* Flush the queues */
 368
 369         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 370                 if (skb->sk != sk) {    /* A pending connection */
 371                         /* Queue the unaccepted socket for death */
 372                         sock_set_flag(skb->sk, SOCK_DEAD);
 373                         rose_start_heartbeat(skb->sk);
 374                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 375                 }
 376
 377                 kfree_skb(skb);
 378         }
 379
 380         if (sk_has_allocations(sk)) {
 381                 /* Defer: outstanding buffers */
 382                 timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
 383                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 384                 add_timer(&sk->sk_timer);
 385         } else
 386                 sock_put(sk);
 387 }
 388
 389 /*
 390  *      Handling for system calls applied via the various interfaces to a
 391  *      ROSE socket object.
 392  */
 393
 394 static int rose_setsockopt(struct socket *sock, int level, int optname,
 395                 sockptr_t optval, unsigned int optlen)
 396 {
 397         struct sock *sk = sock->sk;
 398         struct rose_sock *rose = rose_sk(sk);
 399         int opt;
 400
 401         if (level != SOL_ROSE)
 402                 return -ENOPROTOOPT;
 403
 404         if (optlen < sizeof(int))
 405                 return -EINVAL;
 406
 407         if (copy_from_sockptr(&opt, optval, sizeof(int)))
 408                 return -EFAULT;
 409
 410         switch (optname) {
 411         case ROSE_DEFER:
 412                 rose->defer = opt ? 1 : 0;
 413                 return 0;
 414
 415         case ROSE_T1:
 416                 if (opt < 1)
 417                         return -EINVAL;
 418                 rose->t1 = opt * HZ;
 419                 return 0;
 420
 421         case ROSE_T2:
 422                 if (opt < 1)
 423                         return -EINVAL;
 424                 rose->t2 = opt * HZ;
 425                 return 0;
 426
 427         case ROSE_T3:
 428                 if (opt < 1)
 429                         return -EINVAL;
 430                 rose->t3 = opt * HZ;
 431                 return 0;
 432
 433         case ROSE_HOLDBACK:
 434                 if (opt < 1)
 435                         return -EINVAL;
 436                 rose->hb = opt * HZ;
 437                 return 0;
 438
 439         case ROSE_IDLE:
 440                 if (opt < 0)
 441                         return -EINVAL;
 442                 rose->idle = opt * 60 * HZ;
 443                 return 0;
 444
 445         case ROSE_QBITINCL:
 446                 rose->qbitincl = opt ? 1 : 0;
 447                 return 0;
 448
 449         default:
 450                 return -ENOPROTOOPT;
 451         }
 452 }
 453
 454 static int rose_getsockopt(struct socket *sock, int level, int optname,
 455         char __user *optval, int __user *optlen)
 456 {
 457         struct sock *sk = sock->sk;
 458         struct rose_sock *rose = rose_sk(sk);
 459         int val = 0;
 460         int len;
 461
 462         if (level != SOL_ROSE)
 463                 return -ENOPROTOOPT;
 464
 465         if (get_user(len, optlen))
 466                 return -EFAULT;
 467
 468         if (len < 0)
 469                 return -EINVAL;
 470
 471         switch (optname) {
 472         case ROSE_DEFER:
 473                 val = rose->defer;
 474                 break;
 475
 476         case ROSE_T1:
 477                 val = rose->t1 / HZ;
 478                 break;
 479
 480         case ROSE_T2:
 481                 val = rose->t2 / HZ;
 482                 break;
 483
 484         case ROSE_T3:
 485                 val = rose->t3 / HZ;
 486                 break;
 487
 488         case ROSE_HOLDBACK:
 489                 val = rose->hb / HZ;
 490                 break;
 491
 492         case ROSE_IDLE:
 493                 val = rose->idle / (60 * HZ);
 494                 break;
 495
 496         case ROSE_QBITINCL:
 497                 val = rose->qbitincl;
 498                 break;
 499
 500         default:
 501                 return -ENOPROTOOPT;
 502         }
 503
 504         len = min_t(unsigned int, len, sizeof(int));
 505
 506         if (put_user(len, optlen))
 507                 return -EFAULT;
 508
 509         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 510 }
 511
 512 static int rose_listen(struct socket *sock, int backlog)
 513 {
 514         struct sock *sk = sock->sk;
 515
 516         lock_sock(sk);
 517         if (sock->state != SS_UNCONNECTED) {
 518                 release_sock(sk);
 519                 return -EINVAL;
 520         }
 521
 522         if (sk->sk_state != TCP_LISTEN) {
 523                 struct rose_sock *rose = rose_sk(sk);
 524
 525                 rose->dest_ndigis = 0;
 526                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 527                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 528                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 529                 sk->sk_max_ack_backlog = backlog;
 530                 sk->sk_state           = TCP_LISTEN;
 531                 release_sock(sk);
 532                 return 0;
 533         }
 534         release_sock(sk);
 535
 536         return -EOPNOTSUPP;
 537 }
 538
 539 static struct proto rose_proto = {
 540         .name     = "ROSE",
 541         .owner    = THIS_MODULE,
 542         .obj_size = sizeof(struct rose_sock),
 543 };
 544
 545 static int rose_create(struct net *net, struct socket *sock, int protocol,
 546                        int kern)
 547 {
 548         struct sock *sk;
 549         struct rose_sock *rose;
 550
 551         if (!net_eq(net, &init_net))
 552                 return -EAFNOSUPPORT;
 553
 554         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 555                 return -ESOCKTNOSUPPORT;
 556
 557         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
 558         if (sk == NULL)
 559                 return -ENOMEM;
 560
 561         rose = rose_sk(sk);
 562
 563         sock_init_data(sock, sk);
 564
 565         skb_queue_head_init(&rose->ack_queue);
 566 #ifdef M_BIT
 567         skb_queue_head_init(&rose->frag_queue);
 568         rose->fraglen    = 0;
 569 #endif
 570
 571         sock->ops    = &rose_proto_ops;
 572         sk->sk_protocol = protocol;
 573
 574         timer_setup(&rose->timer, NULL, 0);
 575         timer_setup(&rose->idletimer, NULL, 0);
 576
 577         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 578         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 579         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 580         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 581         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 582
 583         rose->state = ROSE_STATE_0;
 584
 585         return 0;
 586 }
 587
 588 static struct sock *rose_make_new(struct sock *osk)
 589 {
 590         struct sock *sk;
 591         struct rose_sock *rose, *orose;
 592
 593         if (osk->sk_type != SOCK_SEQPACKET)
 594                 return NULL;
 595
 596         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
 597         if (sk == NULL)
 598                 return NULL;
 599
 600         rose = rose_sk(sk);
 601
 602         sock_init_data(NULL, sk);
 603
 604         skb_queue_head_init(&rose->ack_queue);
 605 #ifdef M_BIT
 606         skb_queue_head_init(&rose->frag_queue);
 607         rose->fraglen  = 0;
 608 #endif
 609
 610         sk->sk_type     = osk->sk_type;
 611         sk->sk_priority = osk->sk_priority;
 612         sk->sk_protocol = osk->sk_protocol;
 613         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 614         sk->sk_sndbuf   = osk->sk_sndbuf;
 615         sk->sk_state    = TCP_ESTABLISHED;
 616         sock_copy_flags(sk, osk);
 617
 618         timer_setup(&rose->timer, NULL, 0);
 619         timer_setup(&rose->idletimer, NULL, 0);
 620
 621         orose           = rose_sk(osk);
 622         rose->t1        = orose->t1;
 623         rose->t2        = orose->t2;
 624         rose->t3        = orose->t3;
 625         rose->hb        = orose->hb;
 626         rose->idle      = orose->idle;
 627         rose->defer     = orose->defer;
 628         rose->device    = orose->device;
 629         if (rose->device)
 630                 dev_hold(rose->device);
 631         rose->qbitincl  = orose->qbitincl;
 632
 633         return sk;
 634 }
 635
 636 static int rose_release(struct socket *sock)
 637 {
 638         struct sock *sk = sock->sk;
 639         struct rose_sock *rose;
 640
 641         if (sk == NULL) return 0;
 642
 643         sock_hold(sk);
 644         sock_orphan(sk);
 645         lock_sock(sk);
 646         rose = rose_sk(sk);
 647
 648         switch (rose->state) {
 649         case ROSE_STATE_0:
 650                 release_sock(sk);
 651                 rose_disconnect(sk, 0, -1, -1);
 652                 lock_sock(sk);
 653                 rose_destroy_socket(sk);
 654                 break;
 655
 656         case ROSE_STATE_2:
 657                 rose->neighbour->use--;
 658                 release_sock(sk);
 659                 rose_disconnect(sk, 0, -1, -1);
 660                 lock_sock(sk);
 661                 rose_destroy_socket(sk);
 662                 break;
 663
 664         case ROSE_STATE_1:
 665         case ROSE_STATE_3:
 666         case ROSE_STATE_4:
 667         case ROSE_STATE_5:
 668                 rose_clear_queues(sk);
 669                 rose_stop_idletimer(sk);
 670                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 671                 rose_start_t3timer(sk);
 672                 rose->state  = ROSE_STATE_2;
 673                 sk->sk_state    = TCP_CLOSE;
 674                 sk->sk_shutdown |= SEND_SHUTDOWN;
 675                 sk->sk_state_change(sk);
 676                 sock_set_flag(sk, SOCK_DEAD);
 677                 sock_set_flag(sk, SOCK_DESTROY);
 678                 break;
 679
 680         default:
 681                 break;
 682         }
 683
 684         spin_lock_bh(&rose_list_lock);
 685         dev_put(rose->device);
 686         rose->device = NULL;
 687         spin_unlock_bh(&rose_list_lock);
 688         sock->sk = NULL;
 689         release_sock(sk);
 690         sock_put(sk);
 691
 692         return 0;
 693 }
 694
 695 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 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         struct net_device *dev;
 701         ax25_address *source;
 702         ax25_uid_assoc *user;
 703         int n;
 704
 705         if (!sock_flag(sk, SOCK_ZAPPED))
 706                 return -EINVAL;
 707
 708         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 709                 return -EINVAL;
 710
 711         if (addr->srose_family != AF_ROSE)
 712                 return -EINVAL;
 713
 714         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 715                 return -EINVAL;
 716
 717         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 718                 return -EINVAL;
 719
 720         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
 721                 return -EADDRNOTAVAIL;
 722
 723         source = &addr->srose_call;
 724
 725         user = ax25_findbyuid(current_euid());
 726         if (user) {
 727                 rose->source_call = user->call;
 728                 ax25_uid_put(user);
 729         } else {
 730                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
 731                         dev_put(dev);
 732                         return -EACCES;
 733                 }
 734                 rose->source_call   = *source;
 735         }
 736
 737         rose->source_addr   = addr->srose_addr;
 738         rose->device        = dev;
 739         rose->source_ndigis = addr->srose_ndigis;
 740
 741         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 742                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 743                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 744                         rose->source_digis[n] = full_addr->srose_digis[n];
 745         } else {
 746                 if (rose->source_ndigis == 1) {
 747                         rose->source_digis[0] = addr->srose_digi;
 748                 }
 749         }
 750
 751         rose_insert_socket(sk);
 752
 753         sock_reset_flag(sk, SOCK_ZAPPED);
 754
 755         return 0;
 756 }
 757
 758 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 759 {
 760         struct sock *sk = sock->sk;
 761         struct rose_sock *rose = rose_sk(sk);
 762         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 763         unsigned char cause, diagnostic;
 764         ax25_uid_assoc *user;
 765         int n, err = 0;
 766
 767         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 768                 return -EINVAL;
 769
 770         if (addr->srose_family != AF_ROSE)
 771                 return -EINVAL;
 772
 773         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 774                 return -EINVAL;
 775
 776         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 777                 return -EINVAL;
 778
 779         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 780         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 781                 return -EINVAL;
 782
 783         lock_sock(sk);
 784
 785         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 786                 /* Connect completed during a ERESTARTSYS event */
 787                 sock->state = SS_CONNECTED;
 788                 goto out_release;
 789         }
 790
 791         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 792                 sock->state = SS_UNCONNECTED;
 793                 err = -ECONNREFUSED;
 794                 goto out_release;
 795         }
 796
 797         if (sk->sk_state == TCP_ESTABLISHED) {
 798                 /* No reconnect on a seqpacket socket */
 799                 err = -EISCONN;
 800                 goto out_release;
 801         }
 802
 803         sk->sk_state   = TCP_CLOSE;
 804         sock->state = SS_UNCONNECTED;
 805
 806         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 807                                          &diagnostic, 0);
 808         if (!rose->neighbour) {
 809                 err = -ENETUNREACH;
 810                 goto out_release;
 811         }
 812
 813         rose->lci = rose_new_lci(rose->neighbour);
 814         if (!rose->lci) {
 815                 err = -ENETUNREACH;
 816                 goto out_release;
 817         }
 818
 819         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 820                 struct net_device *dev;
 821
 822                 sock_reset_flag(sk, SOCK_ZAPPED);
 823
 824                 dev = rose_dev_first();
 825                 if (!dev) {
 826                         err = -ENETUNREACH;
 827                         goto out_release;
 828                 }
 829
 830                 user = ax25_findbyuid(current_euid());
 831                 if (!user) {
 832                         err = -EINVAL;
 833                         dev_put(dev);
 834                         goto out_release;
 835                 }
 836
 837                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 838                 rose->source_call = user->call;
 839                 rose->device      = dev;
 840                 ax25_uid_put(user);
 841
 842                 rose_insert_socket(sk);         /* Finish the bind */
 843         }
 844         rose->dest_addr   = addr->srose_addr;
 845         rose->dest_call   = addr->srose_call;
 846         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 847         rose->dest_ndigis = addr->srose_ndigis;
 848
 849         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 850                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 851                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 852                         rose->dest_digis[n] = full_addr->srose_digis[n];
 853         } else {
 854                 if (rose->dest_ndigis == 1) {
 855                         rose->dest_digis[0] = addr->srose_digi;
 856                 }
 857         }
 858
 859         /* Move to connecting socket, start sending Connect Requests */
 860         sock->state   = SS_CONNECTING;
 861         sk->sk_state     = TCP_SYN_SENT;
 862
 863         rose->state = ROSE_STATE_1;
 864
 865         rose->neighbour->use++;
 866
 867         rose_write_internal(sk, ROSE_CALL_REQUEST);
 868         rose_start_heartbeat(sk);
 869         rose_start_t1timer(sk);
 870
 871         /* Now the loop */
 872         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 873                 err = -EINPROGRESS;
 874                 goto out_release;
 875         }
 876
 877         /*
 878          * A Connect Ack with Choke or timeout or failed routing will go to
 879          * closed.
 880          */
 881         if (sk->sk_state == TCP_SYN_SENT) {
 882                 DEFINE_WAIT(wait);
 883
 884                 for (;;) {
 885                         prepare_to_wait(sk_sleep(sk), &wait,
 886                                         TASK_INTERRUPTIBLE);
 887                         if (sk->sk_state != TCP_SYN_SENT)
 888                                 break;
 889                         if (!signal_pending(current)) {
 890                                 release_sock(sk);
 891                                 schedule();
 892                                 lock_sock(sk);
 893                                 continue;
 894                         }
 895                         err = -ERESTARTSYS;
 896                         break;
 897                 }
 898                 finish_wait(sk_sleep(sk), &wait);
 899
 900                 if (err)
 901                         goto out_release;
 902         }
 903
 904         if (sk->sk_state != TCP_ESTABLISHED) {
 905                 sock->state = SS_UNCONNECTED;
 906                 err = sock_error(sk);   /* Always set at this point */
 907                 goto out_release;
 908         }
 909
 910         sock->state = SS_CONNECTED;
 911
 912 out_release:
 913         release_sock(sk);
 914
 915         return err;
 916 }
 917
 918 static int rose_accept(struct socket *sock, struct socket *newsock, int flags,
 919                        bool kern)
 920 {
 921         struct sk_buff *skb;
 922         struct sock *newsk;
 923         DEFINE_WAIT(wait);
 924         struct sock *sk;
 925         int err = 0;
 926
 927         if ((sk = sock->sk) == NULL)
 928                 return -EINVAL;
 929
 930         lock_sock(sk);
 931         if (sk->sk_type != SOCK_SEQPACKET) {
 932                 err = -EOPNOTSUPP;
 933                 goto out_release;
 934         }
 935
 936         if (sk->sk_state != TCP_LISTEN) {
 937                 err = -EINVAL;
 938                 goto out_release;
 939         }
 940
 941         /*
 942          *      The write queue this time is holding sockets ready to use
 943          *      hooked into the SABM we saved
 944          */
 945         for (;;) {
 946                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 947
 948                 skb = skb_dequeue(&sk->sk_receive_queue);
 949                 if (skb)
 950                         break;
 951
 952                 if (flags & O_NONBLOCK) {
 953                         err = -EWOULDBLOCK;
 954                         break;
 955                 }
 956                 if (!signal_pending(current)) {
 957                         release_sock(sk);
 958                         schedule();
 959                         lock_sock(sk);
 960                         continue;
 961                 }
 962                 err = -ERESTARTSYS;
 963                 break;
 964         }
 965         finish_wait(sk_sleep(sk), &wait);
 966         if (err)
 967                 goto out_release;
 968
 969         newsk = skb->sk;
 970         sock_graft(newsk, newsock);
 971
 972         /* Now attach up the new socket */
 973         skb->sk = NULL;
 974         kfree_skb(skb);
 975         sk_acceptq_removed(sk);
 976
 977 out_release:
 978         release_sock(sk);
 979
 980         return err;
 981 }
 982
 983 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 984         int peer)
 985 {
 986         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 987         struct sock *sk = sock->sk;
 988         struct rose_sock *rose = rose_sk(sk);
 989         int n;
 990
 991         memset(srose, 0, sizeof(*srose));
 992         if (peer != 0) {
 993                 if (sk->sk_state != TCP_ESTABLISHED)
 994                         return -ENOTCONN;
 995                 srose->srose_family = AF_ROSE;
 996                 srose->srose_addr   = rose->dest_addr;
 997                 srose->srose_call   = rose->dest_call;
 998                 srose->srose_ndigis = rose->dest_ndigis;
 999                 for (n = 0; n < rose->dest_ndigis; n++)
1000                         srose->srose_digis[n] = rose->dest_digis[n];
1001         } else {
1002                 srose->srose_family = AF_ROSE;
1003                 srose->srose_addr   = rose->source_addr;
1004                 srose->srose_call   = rose->source_call;
1005                 srose->srose_ndigis = rose->source_ndigis;
1006                 for (n = 0; n < rose->source_ndigis; n++)
1007                         srose->srose_digis[n] = rose->source_digis[n];
1008         }
1009
1010         return sizeof(struct full_sockaddr_rose);
1011 }
1012
1013 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
1014 {
1015         struct sock *sk;
1016         struct sock *make;
1017         struct rose_sock *make_rose;
1018         struct rose_facilities_struct facilities;
1019         int n;
1020
1021         skb->sk = NULL;         /* Initially we don't know who it's for */
1022
1023         /*
1024          *      skb->data points to the rose frame start
1025          */
1026         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
1027
1028         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
1029                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
1030                                    &facilities)) {
1031                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1032                 return 0;
1033         }
1034
1035         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1036
1037         /*
1038          * We can't accept the Call Request.
1039          */
1040         if (sk == NULL || sk_acceptq_is_full(sk) ||
1041             (make = rose_make_new(sk)) == NULL) {
1042                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1043                 return 0;
1044         }
1045
1046         skb->sk     = make;
1047         make->sk_state = TCP_ESTABLISHED;
1048         make_rose = rose_sk(make);
1049
1050         make_rose->lci           = lci;
1051         make_rose->dest_addr     = facilities.dest_addr;
1052         make_rose->dest_call     = facilities.dest_call;
1053         make_rose->dest_ndigis   = facilities.dest_ndigis;
1054         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1055                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1056         make_rose->source_addr   = facilities.source_addr;
1057         make_rose->source_call   = facilities.source_call;
1058         make_rose->source_ndigis = facilities.source_ndigis;
1059         for (n = 0 ; n < facilities.source_ndigis ; n++)
1060                 make_rose->source_digis[n] = facilities.source_digis[n];
1061         make_rose->neighbour     = neigh;
1062         make_rose->device        = dev;
1063         make_rose->facilities    = facilities;
1064
1065         make_rose->neighbour->use++;
1066
1067         if (rose_sk(sk)->defer) {
1068                 make_rose->state = ROSE_STATE_5;
1069         } else {
1070                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1071                 make_rose->state = ROSE_STATE_3;
1072                 rose_start_idletimer(make);
1073         }
1074
1075         make_rose->condition = 0x00;
1076         make_rose->vs        = 0;
1077         make_rose->va        = 0;
1078         make_rose->vr        = 0;
1079         make_rose->vl        = 0;
1080         sk_acceptq_added(sk);
1081
1082         rose_insert_socket(make);
1083
1084         skb_queue_head(&sk->sk_receive_queue, skb);
1085
1086         rose_start_heartbeat(make);
1087
1088         if (!sock_flag(sk, SOCK_DEAD))
1089                 sk->sk_data_ready(sk);
1090
1091         return 1;
1092 }
1093
1094 static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1095 {
1096         struct sock *sk = sock->sk;
1097         struct rose_sock *rose = rose_sk(sk);
1098         DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1099         int err;
1100         struct full_sockaddr_rose srose;
1101         struct sk_buff *skb;
1102         unsigned char *asmptr;
1103         int n, size, qbit = 0;
1104
1105         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1106                 return -EINVAL;
1107
1108         if (sock_flag(sk, SOCK_ZAPPED))
1109                 return -EADDRNOTAVAIL;
1110
1111         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1112                 send_sig(SIGPIPE, current, 0);
1113                 return -EPIPE;
1114         }
1115
1116         if (rose->neighbour == NULL || rose->device == NULL)
1117                 return -ENETUNREACH;
1118
1119         if (usrose != NULL) {
1120                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1121                         return -EINVAL;
1122                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1123                 memcpy(&srose, usrose, msg->msg_namelen);
1124                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1125                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1126                         return -EISCONN;
1127                 if (srose.srose_ndigis != rose->dest_ndigis)
1128                         return -EISCONN;
1129                 if (srose.srose_ndigis == rose->dest_ndigis) {
1130                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1131                                 if (ax25cmp(&rose->dest_digis[n],
1132                                             &srose.srose_digis[n]))
1133                                         return -EISCONN;
1134                 }
1135                 if (srose.srose_family != AF_ROSE)
1136                         return -EINVAL;
1137         } else {
1138                 if (sk->sk_state != TCP_ESTABLISHED)
1139                         return -ENOTCONN;
1140
1141                 srose.srose_family = AF_ROSE;
1142                 srose.srose_addr   = rose->dest_addr;
1143                 srose.srose_call   = rose->dest_call;
1144                 srose.srose_ndigis = rose->dest_ndigis;
1145                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1146                         srose.srose_digis[n] = rose->dest_digis[n];
1147         }
1148
1149         /* Build a packet */
1150         /* Sanity check the packet size */
1151         if (len > 65535)
1152                 return -EMSGSIZE;
1153
1154         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1155
1156         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1157                 return err;
1158
1159         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1160
1161         /*
1162          *      Put the data on the end
1163          */
1164
1165         skb_reset_transport_header(skb);
1166         skb_put(skb, len);
1167
1168         err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1169         if (err) {
1170                 kfree_skb(skb);
1171                 return err;
1172         }
1173
1174         /*
1175          *      If the Q BIT Include socket option is in force, the first
1176          *      byte of the user data is the logical value of the Q Bit.
1177          */
1178         if (rose->qbitincl) {
1179                 qbit = skb->data[0];
1180                 skb_pull(skb, 1);
1181         }
1182
1183         /*
1184          *      Push down the ROSE header
1185          */
1186         asmptr = skb_push(skb, ROSE_MIN_LEN);
1187
1188         /* Build a ROSE Network header */
1189         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1190         asmptr[1] = (rose->lci >> 0) & 0xFF;
1191         asmptr[2] = ROSE_DATA;
1192
1193         if (qbit)
1194                 asmptr[0] |= ROSE_Q_BIT;
1195
1196         if (sk->sk_state != TCP_ESTABLISHED) {
1197                 kfree_skb(skb);
1198                 return -ENOTCONN;
1199         }
1200
1201 #ifdef M_BIT
1202 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1203         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1204                 unsigned char header[ROSE_MIN_LEN];
1205                 struct sk_buff *skbn;
1206                 int frontlen;
1207                 int lg;
1208
1209                 /* Save a copy of the Header */
1210                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1211                 skb_pull(skb, ROSE_MIN_LEN);
1212
1213                 frontlen = skb_headroom(skb);
1214
1215                 while (skb->len > 0) {
1216                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1217                                 kfree_skb(skb);
1218                                 return err;
1219                         }
1220
1221                         skbn->sk   = sk;
1222                         skbn->free = 1;
1223                         skbn->arp  = 1;
1224
1225                         skb_reserve(skbn, frontlen);
1226
1227                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1228
1229                         /* Copy the user data */
1230                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1231                         skb_pull(skb, lg);
1232
1233                         /* Duplicate the Header */
1234                         skb_push(skbn, ROSE_MIN_LEN);
1235                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1236
1237                         if (skb->len > 0)
1238                                 skbn->data[2] |= M_BIT;
1239
1240                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1241                 }
1242
1243                 skb->free = 1;
1244                 kfree_skb(skb);
1245         } else {
1246                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1247         }
1248 #else
1249         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1250 #endif
1251
1252         rose_kick(sk);
1253
1254         return len;
1255 }
1256
1257
1258 static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1259                         int flags)
1260 {
1261         struct sock *sk = sock->sk;
1262         struct rose_sock *rose = rose_sk(sk);
1263         size_t copied;
1264         unsigned char *asmptr;
1265         struct sk_buff *skb;
1266         int n, er, qbit;
1267
1268         /*
1269          * This works for seqpacket too. The receiver has ordered the queue for
1270          * us! We do one quick check first though
1271          */
1272         if (sk->sk_state != TCP_ESTABLISHED)
1273                 return -ENOTCONN;
1274
1275         /* Now we can treat all alike */
1276         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1277                 return er;
1278
1279         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1280
1281         skb_pull(skb, ROSE_MIN_LEN);
1282
1283         if (rose->qbitincl) {
1284                 asmptr  = skb_push(skb, 1);
1285                 *asmptr = qbit;
1286         }
1287
1288         skb_reset_transport_header(skb);
1289         copied     = skb->len;
1290
1291         if (copied > size) {
1292                 copied = size;
1293                 msg->msg_flags |= MSG_TRUNC;
1294         }
1295
1296         skb_copy_datagram_msg(skb, 0, msg, copied);
1297
1298         if (msg->msg_name) {
1299                 struct sockaddr_rose *srose;
1300                 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1301                                  msg->msg_name);
1302
1303                 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1304                 srose = msg->msg_name;
1305                 srose->srose_family = AF_ROSE;
1306                 srose->srose_addr   = rose->dest_addr;
1307                 srose->srose_call   = rose->dest_call;
1308                 srose->srose_ndigis = rose->dest_ndigis;
1309                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1310                         full_srose->srose_digis[n] = rose->dest_digis[n];
1311                 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1312         }
1313
1314         skb_free_datagram(sk, skb);
1315
1316         return copied;
1317 }
1318
1319
1320 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1321 {
1322         struct sock *sk = sock->sk;
1323         struct rose_sock *rose = rose_sk(sk);
1324         void __user *argp = (void __user *)arg;
1325
1326         switch (cmd) {
1327         case TIOCOUTQ: {
1328                 long amount;
1329
1330                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1331                 if (amount < 0)
1332                         amount = 0;
1333                 return put_user(amount, (unsigned int __user *) argp);
1334         }
1335
1336         case TIOCINQ: {
1337                 struct sk_buff *skb;
1338                 long amount = 0L;
1339
1340                 spin_lock_irq(&sk->sk_receive_queue.lock);
1341                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1342                         amount = skb->len;
1343                 spin_unlock_irq(&sk->sk_receive_queue.lock);
1344                 return put_user(amount, (unsigned int __user *) argp);
1345         }
1346
1347         case SIOCGIFADDR:
1348         case SIOCSIFADDR:
1349         case SIOCGIFDSTADDR:
1350         case SIOCSIFDSTADDR:
1351         case SIOCGIFBRDADDR:
1352         case SIOCSIFBRDADDR:
1353         case SIOCGIFNETMASK:
1354         case SIOCSIFNETMASK:
1355         case SIOCGIFMETRIC:
1356         case SIOCSIFMETRIC:
1357                 return -EINVAL;
1358
1359         case SIOCADDRT:
1360         case SIOCDELRT:
1361         case SIOCRSCLRRT:
1362                 if (!capable(CAP_NET_ADMIN))
1363                         return -EPERM;
1364                 return rose_rt_ioctl(cmd, argp);
1365
1366         case SIOCRSGCAUSE: {
1367                 struct rose_cause_struct rose_cause;
1368                 rose_cause.cause      = rose->cause;
1369                 rose_cause.diagnostic = rose->diagnostic;
1370                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1371         }
1372
1373         case SIOCRSSCAUSE: {
1374                 struct rose_cause_struct rose_cause;
1375                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1376                         return -EFAULT;
1377                 rose->cause      = rose_cause.cause;
1378                 rose->diagnostic = rose_cause.diagnostic;
1379                 return 0;
1380         }
1381
1382         case SIOCRSSL2CALL:
1383                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1384                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1385                         ax25_listen_release(&rose_callsign, NULL);
1386                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1387                         return -EFAULT;
1388                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1389                         return ax25_listen_register(&rose_callsign, NULL);
1390
1391                 return 0;
1392
1393         case SIOCRSGL2CALL:
1394                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1395
1396         case SIOCRSACCEPT:
1397                 if (rose->state == ROSE_STATE_5) {
1398                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1399                         rose_start_idletimer(sk);
1400                         rose->condition = 0x00;
1401                         rose->vs        = 0;
1402                         rose->va        = 0;
1403                         rose->vr        = 0;
1404                         rose->vl        = 0;
1405                         rose->state     = ROSE_STATE_3;
1406                 }
1407                 return 0;
1408
1409         default:
1410                 return -ENOIOCTLCMD;
1411         }
1412
1413         return 0;
1414 }
1415
1416 #ifdef CONFIG_PROC_FS
1417 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1418         __acquires(rose_list_lock)
1419 {
1420         spin_lock_bh(&rose_list_lock);
1421         return seq_hlist_start_head(&rose_list, *pos);
1422 }
1423
1424 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1425 {
1426         return seq_hlist_next(v, &rose_list, pos);
1427 }
1428
1429 static void rose_info_stop(struct seq_file *seq, void *v)
1430         __releases(rose_list_lock)
1431 {
1432         spin_unlock_bh(&rose_list_lock);
1433 }
1434
1435 static int rose_info_show(struct seq_file *seq, void *v)
1436 {
1437         char buf[11], rsbuf[11];
1438
1439         if (v == SEQ_START_TOKEN)
1440                 seq_puts(seq,
1441                          "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");
1442
1443         else {
1444                 struct sock *s = sk_entry(v);
1445                 struct rose_sock *rose = rose_sk(s);
1446                 const char *devname, *callsign;
1447                 const struct net_device *dev = rose->device;
1448
1449                 if (!dev)
1450                         devname = "???";
1451                 else
1452                         devname = dev->name;
1453
1454                 seq_printf(seq, "%-10s %-9s ",
1455                            rose2asc(rsbuf, &rose->dest_addr),
1456                            ax2asc(buf, &rose->dest_call));
1457
1458                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1459                         callsign = "??????-?";
1460                 else
1461                         callsign = ax2asc(buf, &rose->source_call);
1462
1463                 seq_printf(seq,
1464                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1465                         rose2asc(rsbuf, &rose->source_addr),
1466                         callsign,
1467                         devname,
1468                         rose->lci & 0x0FFF,
1469                         (rose->neighbour) ? rose->neighbour->number : 0,
1470                         rose->state,
1471                         rose->vs,
1472                         rose->vr,
1473                         rose->va,
1474                         ax25_display_timer(&rose->timer) / HZ,
1475                         rose->t1 / HZ,
1476                         rose->t2 / HZ,
1477                         rose->t3 / HZ,
1478                         rose->hb / HZ,
1479                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1480                         rose->idle / (60 * HZ),
1481                         sk_wmem_alloc_get(s),
1482                         sk_rmem_alloc_get(s),
1483                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1484         }
1485
1486         return 0;
1487 }
1488
1489 static const struct seq_operations rose_info_seqops = {
1490         .start = rose_info_start,
1491         .next = rose_info_next,
1492         .stop = rose_info_stop,
1493         .show = rose_info_show,
1494 };
1495 #endif  /* CONFIG_PROC_FS */
1496
1497 static const struct net_proto_family rose_family_ops = {
1498         .family         =       PF_ROSE,
1499         .create         =       rose_create,
1500         .owner          =       THIS_MODULE,
1501 };
1502
1503 static const struct proto_ops rose_proto_ops = {
1504         .family         =       PF_ROSE,
1505         .owner          =       THIS_MODULE,
1506         .release        =       rose_release,
1507         .bind           =       rose_bind,
1508         .connect        =       rose_connect,
1509         .socketpair     =       sock_no_socketpair,
1510         .accept         =       rose_accept,
1511         .getname        =       rose_getname,
1512         .poll           =       datagram_poll,
1513         .ioctl          =       rose_ioctl,
1514         .gettstamp      =       sock_gettstamp,
1515         .listen         =       rose_listen,
1516         .shutdown       =       sock_no_shutdown,
1517         .setsockopt     =       rose_setsockopt,
1518         .getsockopt     =       rose_getsockopt,
1519         .sendmsg        =       rose_sendmsg,
1520         .recvmsg        =       rose_recvmsg,
1521         .mmap           =       sock_no_mmap,
1522         .sendpage       =       sock_no_sendpage,
1523 };
1524
1525 static struct notifier_block rose_dev_notifier = {
1526         .notifier_call  =       rose_device_event,
1527 };
1528
1529 static struct net_device **dev_rose;
1530
1531 static struct ax25_protocol rose_pid = {
1532         .pid    = AX25_P_ROSE,
1533         .func   = rose_route_frame
1534 };
1535
1536 static struct ax25_linkfail rose_linkfail_notifier = {
1537         .func   = rose_link_failed
1538 };
1539
1540 static int __init rose_proto_init(void)
1541 {
1542         int i;
1543         int rc;
1544
1545         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1546                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
1547                 rc = -EINVAL;
1548                 goto out;
1549         }
1550
1551         rc = proto_register(&rose_proto, 0);
1552         if (rc != 0)
1553                 goto out;
1554
1555         rose_callsign = null_ax25_address;
1556
1557         dev_rose = kcalloc(rose_ndevs, sizeof(struct net_device *),
1558                            GFP_KERNEL);
1559         if (dev_rose == NULL) {
1560                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1561                 rc = -ENOMEM;
1562                 goto out_proto_unregister;
1563         }
1564
1565         for (i = 0; i < rose_ndevs; i++) {
1566                 struct net_device *dev;
1567                 char name[IFNAMSIZ];
1568
1569                 sprintf(name, "rose%d", i);
1570                 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1571                 if (!dev) {
1572                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1573                         rc = -ENOMEM;
1574                         goto fail;
1575                 }
1576                 rc = register_netdev(dev);
1577                 if (rc) {
1578                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1579                         free_netdev(dev);
1580                         goto fail;
1581                 }
1582                 rose_set_lockdep_key(dev);
1583                 dev_rose[i] = dev;
1584         }
1585
1586         sock_register(&rose_family_ops);
1587         register_netdevice_notifier(&rose_dev_notifier);
1588
1589         ax25_register_pid(&rose_pid);
1590         ax25_linkfail_register(&rose_linkfail_notifier);
1591
1592 #ifdef CONFIG_SYSCTL
1593         rose_register_sysctl();
1594 #endif
1595         rose_loopback_init();
1596
1597         rose_add_loopback_neigh();
1598
1599         proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
1600         proc_create_seq("rose_neigh", 0444, init_net.proc_net,
1601                     &rose_neigh_seqops);
1602         proc_create_seq("rose_nodes", 0444, init_net.proc_net,
1603                     &rose_node_seqops);
1604         proc_create_seq("rose_routes", 0444, init_net.proc_net,
1605                     &rose_route_seqops);
1606 out:
1607         return rc;
1608 fail:
1609         while (--i >= 0) {
1610                 unregister_netdev(dev_rose[i]);
1611                 free_netdev(dev_rose[i]);
1612         }
1613         kfree(dev_rose);
1614 out_proto_unregister:
1615         proto_unregister(&rose_proto);
1616         goto out;
1617 }
1618 module_init(rose_proto_init);
1619
1620 module_param(rose_ndevs, int, 0);
1621 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1622
1623 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1624 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1625 MODULE_LICENSE("GPL");
1626 MODULE_ALIAS_NETPROTO(PF_ROSE);
1627
1628 static void __exit rose_exit(void)
1629 {
1630         int i;
1631
1632         remove_proc_entry("rose", init_net.proc_net);
1633         remove_proc_entry("rose_neigh", init_net.proc_net);
1634         remove_proc_entry("rose_nodes", init_net.proc_net);
1635         remove_proc_entry("rose_routes", init_net.proc_net);
1636         rose_loopback_clear();
1637
1638         rose_rt_free();
1639
1640         ax25_protocol_release(AX25_P_ROSE);
1641         ax25_linkfail_release(&rose_linkfail_notifier);
1642
1643         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1644                 ax25_listen_release(&rose_callsign, NULL);
1645
1646 #ifdef CONFIG_SYSCTL
1647         rose_unregister_sysctl();
1648 #endif
1649         unregister_netdevice_notifier(&rose_dev_notifier);
1650
1651         sock_unregister(PF_ROSE);
1652
1653         for (i = 0; i < rose_ndevs; i++) {
1654                 struct net_device *dev = dev_rose[i];
1655
1656                 if (dev) {
1657                         unregister_netdev(dev);
1658                         free_netdev(dev);
1659                 }
1660         }
1661
1662         kfree(dev_rose);
1663         proto_unregister(&rose_proto);
1664 }
1665
1666 module_exit(rose_exit);