net/rose/af_rose.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
   8  * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
   9  * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
  10  * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
  11  */
  12
  13 #include <linux/capability.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/errno.h>
  18 #include <linux/types.h>
  19 #include <linux/socket.h>
  20 #include <linux/in.h>
  21 #include <linux/slab.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sched.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/timer.h>
  26 #include <linux/string.h>
  27 #include <linux/sockios.h>
  28 #include <linux/net.h>
  29 #include <linux/stat.h>
  30 #include <net/net_namespace.h>
  31 #include <net/ax25.h>
  32 #include <linux/inet.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/if_arp.h>
  35 #include <linux/skbuff.h>
  36 #include <net/sock.h>
  37 #include <asm/uaccess.h>
  38 #include <linux/fcntl.h>
  39 #include <linux/termios.h>
  40 #include <linux/mm.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/notifier.h>
  43 #include <net/rose.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/seq_file.h>
  46 #include <net/tcp_states.h>
  47 #include <net/ip.h>
  48 #include <net/arp.h>
  49
  50 static int rose_ndevs = 10;
  51
  52 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  53 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  54 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  55 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  56 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  57 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  58 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  59 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  60 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  61 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  62
  63 static HLIST_HEAD(rose_list);
  64 static DEFINE_SPINLOCK(rose_list_lock);
  65
  66 static const struct proto_ops rose_proto_ops;
  67
  68 ax25_address rose_callsign;
  69
  70 /*
  71  * ROSE network devices are virtual network devices encapsulating ROSE
  72  * frames into AX.25 which will be sent through an AX.25 device, so form a
  73  * special "super class" of normal net devices; split their locks off into a
  74  * separate class since they always nest.
  75  */
  76 static struct lock_class_key rose_netdev_xmit_lock_key;
  77 static struct lock_class_key rose_netdev_addr_lock_key;
  78
  79 static void rose_set_lockdep_one(struct net_device *dev,
  80                                  struct netdev_queue *txq,
  81                                  void *_unused)
  82 {
  83         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
  84 }
  85
  86 static void rose_set_lockdep_key(struct net_device *dev)
  87 {
  88         lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
  89         netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
  90 }
  91
  92 /*
  93  *      Convert a ROSE address into text.
  94  */
  95 char *rose2asc(char *buf, const rose_address *addr)
  96 {
  97         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  98             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  99             addr->rose_addr[4] == 0x00) {
 100                 strcpy(buf, "*");
 101         } else {
 102                 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 103                                                 addr->rose_addr[1] & 0xFF,
 104                                                 addr->rose_addr[2] & 0xFF,
 105                                                 addr->rose_addr[3] & 0xFF,
 106                                                 addr->rose_addr[4] & 0xFF);
 107         }
 108
 109         return buf;
 110 }
 111
 112 /*
 113  *      Compare two ROSE addresses, 0 == equal.
 114  */
 115 int rosecmp(rose_address *addr1, rose_address *addr2)
 116 {
 117         int i;
 118
 119         for (i = 0; i < 5; i++)
 120                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 121                         return 1;
 122
 123         return 0;
 124 }
 125
 126 /*
 127  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 128  */
 129 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 130 {
 131         unsigned int i, j;
 132
 133         if (mask > 10)
 134                 return 1;
 135
 136         for (i = 0; i < mask; i++) {
 137                 j = i / 2;
 138
 139                 if ((i % 2) != 0) {
 140                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 141                                 return 1;
 142                 } else {
 143                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 144                                 return 1;
 145                 }
 146         }
 147
 148         return 0;
 149 }
 150
 151 /*
 152  *      Socket removal during an interrupt is now safe.
 153  */
 154 static void rose_remove_socket(struct sock *sk)
 155 {
 156         spin_lock_bh(&rose_list_lock);
 157         sk_del_node_init(sk);
 158         spin_unlock_bh(&rose_list_lock);
 159 }
 160
 161 /*
 162  *      Kill all bound sockets on a broken link layer connection to a
 163  *      particular neighbour.
 164  */
 165 void rose_kill_by_neigh(struct rose_neigh *neigh)
 166 {
 167         struct sock *s;
 168
 169         spin_lock_bh(&rose_list_lock);
 170         sk_for_each(s, &rose_list) {
 171                 struct rose_sock *rose = rose_sk(s);
 172
 173                 if (rose->neighbour == neigh) {
 174                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 175                         rose->neighbour->use--;
 176                         rose->neighbour = NULL;
 177                 }
 178         }
 179         spin_unlock_bh(&rose_list_lock);
 180 }
 181
 182 /*
 183  *      Kill all bound sockets on a dropped device.
 184  */
 185 static void rose_kill_by_device(struct net_device *dev)
 186 {
 187         struct sock *s;
 188
 189         spin_lock_bh(&rose_list_lock);
 190         sk_for_each(s, &rose_list) {
 191                 struct rose_sock *rose = rose_sk(s);
 192
 193                 if (rose->device == dev) {
 194                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 195                         rose->neighbour->use--;
 196                         rose->device = NULL;
 197                 }
 198         }
 199         spin_unlock_bh(&rose_list_lock);
 200 }
 201
 202 /*
 203  *      Handle device status changes.
 204  */
 205 static int rose_device_event(struct notifier_block *this,
 206                              unsigned long event, void *ptr)
 207 {
 208         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 209
 210         if (!net_eq(dev_net(dev), &init_net))
 211                 return NOTIFY_DONE;
 212
 213         if (event != NETDEV_DOWN)
 214                 return NOTIFY_DONE;
 215
 216         switch (dev->type) {
 217         case ARPHRD_ROSE:
 218                 rose_kill_by_device(dev);
 219                 break;
 220         case ARPHRD_AX25:
 221                 rose_link_device_down(dev);
 222                 rose_rt_device_down(dev);
 223                 break;
 224         }
 225
 226         return NOTIFY_DONE;
 227 }
 228
 229 /*
 230  *      Add a socket to the bound sockets list.
 231  */
 232 static void rose_insert_socket(struct sock *sk)
 233 {
 234
 235         spin_lock_bh(&rose_list_lock);
 236         sk_add_node(sk, &rose_list);
 237         spin_unlock_bh(&rose_list_lock);
 238 }
 239
 240 /*
 241  *      Find a socket that wants to accept the Call Request we just
 242  *      received.
 243  */
 244 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 245 {
 246         struct sock *s;
 247
 248         spin_lock_bh(&rose_list_lock);
 249         sk_for_each(s, &rose_list) {
 250                 struct rose_sock *rose = rose_sk(s);
 251
 252                 if (!rosecmp(&rose->source_addr, addr) &&
 253                     !ax25cmp(&rose->source_call, call) &&
 254                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 255                         goto found;
 256         }
 257
 258         sk_for_each(s, &rose_list) {
 259                 struct rose_sock *rose = rose_sk(s);
 260
 261                 if (!rosecmp(&rose->source_addr, addr) &&
 262                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 263                     s->sk_state == TCP_LISTEN)
 264                         goto found;
 265         }
 266         s = NULL;
 267 found:
 268         spin_unlock_bh(&rose_list_lock);
 269         return s;
 270 }
 271
 272 /*
 273  *      Find a connected ROSE socket given my LCI and device.
 274  */
 275 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 276 {
 277         struct sock *s;
 278
 279         spin_lock_bh(&rose_list_lock);
 280         sk_for_each(s, &rose_list) {
 281                 struct rose_sock *rose = rose_sk(s);
 282
 283                 if (rose->lci == lci && rose->neighbour == neigh)
 284                         goto found;
 285         }
 286         s = NULL;
 287 found:
 288         spin_unlock_bh(&rose_list_lock);
 289         return s;
 290 }
 291
 292 /*
 293  *      Find a unique LCI for a given device.
 294  */
 295 unsigned int rose_new_lci(struct rose_neigh *neigh)
 296 {
 297         int lci;
 298
 299         if (neigh->dce_mode) {
 300                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 301                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 302                                 return lci;
 303         } else {
 304                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 305                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 306                                 return lci;
 307         }
 308
 309         return 0;
 310 }
 311
 312 /*
 313  *      Deferred destroy.
 314  */
 315 void rose_destroy_socket(struct sock *);
 316
 317 /*
 318  *      Handler for deferred kills.
 319  */
 320 static void rose_destroy_timer(unsigned long data)
 321 {
 322         rose_destroy_socket((struct sock *)data);
 323 }
 324
 325 /*
 326  *      This is called from user mode and the timers. Thus it protects itself
 327  *      against interrupt users but doesn't worry about being called during
 328  *      work.  Once it is removed from the queue no interrupt or bottom half
 329  *      will touch it and we are (fairly 8-) ) safe.
 330  */
 331 void rose_destroy_socket(struct sock *sk)
 332 {
 333         struct sk_buff *skb;
 334
 335         rose_remove_socket(sk);
 336         rose_stop_heartbeat(sk);
 337         rose_stop_idletimer(sk);
 338         rose_stop_timer(sk);
 339
 340         rose_clear_queues(sk);          /* Flush the queues */
 341
 342         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 343                 if (skb->sk != sk) {    /* A pending connection */
 344                         /* Queue the unaccepted socket for death */
 345                         sock_set_flag(skb->sk, SOCK_DEAD);
 346                         rose_start_heartbeat(skb->sk);
 347                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 348                 }
 349
 350                 kfree_skb(skb);
 351         }
 352
 353         if (sk_has_allocations(sk)) {
 354                 /* Defer: outstanding buffers */
 355                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 356                                 (unsigned long)sk);
 357                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 358                 add_timer(&sk->sk_timer);
 359         } else
 360                 sock_put(sk);
 361 }
 362
 363 /*
 364  *      Handling for system calls applied via the various interfaces to a
 365  *      ROSE socket object.
 366  */
 367
 368 static int rose_setsockopt(struct socket *sock, int level, int optname,
 369         char __user *optval, unsigned int optlen)
 370 {
 371         struct sock *sk = sock->sk;
 372         struct rose_sock *rose = rose_sk(sk);
 373         int opt;
 374
 375         if (level != SOL_ROSE)
 376                 return -ENOPROTOOPT;
 377
 378         if (optlen < sizeof(int))
 379                 return -EINVAL;
 380
 381         if (get_user(opt, (int __user *)optval))
 382                 return -EFAULT;
 383
 384         switch (optname) {
 385         case ROSE_DEFER:
 386                 rose->defer = opt ? 1 : 0;
 387                 return 0;
 388
 389         case ROSE_T1:
 390                 if (opt < 1)
 391                         return -EINVAL;
 392                 rose->t1 = opt * HZ;
 393                 return 0;
 394
 395         case ROSE_T2:
 396                 if (opt < 1)
 397                         return -EINVAL;
 398                 rose->t2 = opt * HZ;
 399                 return 0;
 400
 401         case ROSE_T3:
 402                 if (opt < 1)
 403                         return -EINVAL;
 404                 rose->t3 = opt * HZ;
 405                 return 0;
 406
 407         case ROSE_HOLDBACK:
 408                 if (opt < 1)
 409                         return -EINVAL;
 410                 rose->hb = opt * HZ;
 411                 return 0;
 412
 413         case ROSE_IDLE:
 414                 if (opt < 0)
 415                         return -EINVAL;
 416                 rose->idle = opt * 60 * HZ;
 417                 return 0;
 418
 419         case ROSE_QBITINCL:
 420                 rose->qbitincl = opt ? 1 : 0;
 421                 return 0;
 422
 423         default:
 424                 return -ENOPROTOOPT;
 425         }
 426 }
 427
 428 static int rose_getsockopt(struct socket *sock, int level, int optname,
 429         char __user *optval, int __user *optlen)
 430 {
 431         struct sock *sk = sock->sk;
 432         struct rose_sock *rose = rose_sk(sk);
 433         int val = 0;
 434         int len;
 435
 436         if (level != SOL_ROSE)
 437                 return -ENOPROTOOPT;
 438
 439         if (get_user(len, optlen))
 440                 return -EFAULT;
 441
 442         if (len < 0)
 443                 return -EINVAL;
 444
 445         switch (optname) {
 446         case ROSE_DEFER:
 447                 val = rose->defer;
 448                 break;
 449
 450         case ROSE_T1:
 451                 val = rose->t1 / HZ;
 452                 break;
 453
 454         case ROSE_T2:
 455                 val = rose->t2 / HZ;
 456                 break;
 457
 458         case ROSE_T3:
 459                 val = rose->t3 / HZ;
 460                 break;
 461
 462         case ROSE_HOLDBACK:
 463                 val = rose->hb / HZ;
 464                 break;
 465
 466         case ROSE_IDLE:
 467                 val = rose->idle / (60 * HZ);
 468                 break;
 469
 470         case ROSE_QBITINCL:
 471                 val = rose->qbitincl;
 472                 break;
 473
 474         default:
 475                 return -ENOPROTOOPT;
 476         }
 477
 478         len = min_t(unsigned int, len, sizeof(int));
 479
 480         if (put_user(len, optlen))
 481                 return -EFAULT;
 482
 483         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 484 }
 485
 486 static int rose_listen(struct socket *sock, int backlog)
 487 {
 488         struct sock *sk = sock->sk;
 489
 490         if (sk->sk_state != TCP_LISTEN) {
 491                 struct rose_sock *rose = rose_sk(sk);
 492
 493                 rose->dest_ndigis = 0;
 494                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 495                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 496                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 497                 sk->sk_max_ack_backlog = backlog;
 498                 sk->sk_state           = TCP_LISTEN;
 499                 return 0;
 500         }
 501
 502         return -EOPNOTSUPP;
 503 }
 504
 505 static struct proto rose_proto = {
 506         .name     = "ROSE",
 507         .owner    = THIS_MODULE,
 508         .obj_size = sizeof(struct rose_sock),
 509 };
 510
 511 static int rose_create(struct net *net, struct socket *sock, int protocol,
 512                        int kern)
 513 {
 514         struct sock *sk;
 515         struct rose_sock *rose;
 516
 517         if (!net_eq(net, &init_net))
 518                 return -EAFNOSUPPORT;
 519
 520         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 521                 return -ESOCKTNOSUPPORT;
 522
 523         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 524         if (sk == NULL)
 525                 return -ENOMEM;
 526
 527         rose = rose_sk(sk);
 528
 529         sock_init_data(sock, sk);
 530
 531         skb_queue_head_init(&rose->ack_queue);
 532 #ifdef M_BIT
 533         skb_queue_head_init(&rose->frag_queue);
 534         rose->fraglen    = 0;
 535 #endif
 536
 537         sock->ops    = &rose_proto_ops;
 538         sk->sk_protocol = protocol;
 539
 540         init_timer(&rose->timer);
 541         init_timer(&rose->idletimer);
 542
 543         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 544         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 545         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 546         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 547         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 548
 549         rose->state = ROSE_STATE_0;
 550
 551         return 0;
 552 }
 553
 554 static struct sock *rose_make_new(struct sock *osk)
 555 {
 556         struct sock *sk;
 557         struct rose_sock *rose, *orose;
 558
 559         if (osk->sk_type != SOCK_SEQPACKET)
 560                 return NULL;
 561
 562         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
 563         if (sk == NULL)
 564                 return NULL;
 565
 566         rose = rose_sk(sk);
 567
 568         sock_init_data(NULL, sk);
 569
 570         skb_queue_head_init(&rose->ack_queue);
 571 #ifdef M_BIT
 572         skb_queue_head_init(&rose->frag_queue);
 573         rose->fraglen  = 0;
 574 #endif
 575
 576         sk->sk_type     = osk->sk_type;
 577         sk->sk_priority = osk->sk_priority;
 578         sk->sk_protocol = osk->sk_protocol;
 579         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 580         sk->sk_sndbuf   = osk->sk_sndbuf;
 581         sk->sk_state    = TCP_ESTABLISHED;
 582         sock_copy_flags(sk, osk);
 583
 584         init_timer(&rose->timer);
 585         init_timer(&rose->idletimer);
 586
 587         orose           = rose_sk(osk);
 588         rose->t1        = orose->t1;
 589         rose->t2        = orose->t2;
 590         rose->t3        = orose->t3;
 591         rose->hb        = orose->hb;
 592         rose->idle      = orose->idle;
 593         rose->defer     = orose->defer;
 594         rose->device    = orose->device;
 595         rose->qbitincl  = orose->qbitincl;
 596
 597         return sk;
 598 }
 599
 600 static int rose_release(struct socket *sock)
 601 {
 602         struct sock *sk = sock->sk;
 603         struct rose_sock *rose;
 604
 605         if (sk == NULL) return 0;
 606
 607         sock_hold(sk);
 608         sock_orphan(sk);
 609         lock_sock(sk);
 610         rose = rose_sk(sk);
 611
 612         switch (rose->state) {
 613         case ROSE_STATE_0:
 614                 release_sock(sk);
 615                 rose_disconnect(sk, 0, -1, -1);
 616                 lock_sock(sk);
 617                 rose_destroy_socket(sk);
 618                 break;
 619
 620         case ROSE_STATE_2:
 621                 rose->neighbour->use--;
 622                 release_sock(sk);
 623                 rose_disconnect(sk, 0, -1, -1);
 624                 lock_sock(sk);
 625                 rose_destroy_socket(sk);
 626                 break;
 627
 628         case ROSE_STATE_1:
 629         case ROSE_STATE_3:
 630         case ROSE_STATE_4:
 631         case ROSE_STATE_5:
 632                 rose_clear_queues(sk);
 633                 rose_stop_idletimer(sk);
 634                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 635                 rose_start_t3timer(sk);
 636                 rose->state  = ROSE_STATE_2;
 637                 sk->sk_state    = TCP_CLOSE;
 638                 sk->sk_shutdown |= SEND_SHUTDOWN;
 639                 sk->sk_state_change(sk);
 640                 sock_set_flag(sk, SOCK_DEAD);
 641                 sock_set_flag(sk, SOCK_DESTROY);
 642                 break;
 643
 644         default:
 645                 break;
 646         }
 647
 648         sock->sk = NULL;
 649         release_sock(sk);
 650         sock_put(sk);
 651
 652         return 0;
 653 }
 654
 655 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 656 {
 657         struct sock *sk = sock->sk;
 658         struct rose_sock *rose = rose_sk(sk);
 659         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 660         struct net_device *dev;
 661         ax25_address *source;
 662         ax25_uid_assoc *user;
 663         int n;
 664
 665         if (!sock_flag(sk, SOCK_ZAPPED))
 666                 return -EINVAL;
 667
 668         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 669                 return -EINVAL;
 670
 671         if (addr->srose_family != AF_ROSE)
 672                 return -EINVAL;
 673
 674         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 675                 return -EINVAL;
 676
 677         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 678                 return -EINVAL;
 679
 680         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
 681                 return -EADDRNOTAVAIL;
 682
 683         source = &addr->srose_call;
 684
 685         user = ax25_findbyuid(current_euid());
 686         if (user) {
 687                 rose->source_call = user->call;
 688                 ax25_uid_put(user);
 689         } else {
 690                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 691                         return -EACCES;
 692                 rose->source_call   = *source;
 693         }
 694
 695         rose->source_addr   = addr->srose_addr;
 696         rose->device        = dev;
 697         rose->source_ndigis = addr->srose_ndigis;
 698
 699         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 700                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 701                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 702                         rose->source_digis[n] = full_addr->srose_digis[n];
 703         } else {
 704                 if (rose->source_ndigis == 1) {
 705                         rose->source_digis[0] = addr->srose_digi;
 706                 }
 707         }
 708
 709         rose_insert_socket(sk);
 710
 711         sock_reset_flag(sk, SOCK_ZAPPED);
 712
 713         return 0;
 714 }
 715
 716 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 717 {
 718         struct sock *sk = sock->sk;
 719         struct rose_sock *rose = rose_sk(sk);
 720         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 721         unsigned char cause, diagnostic;
 722         struct net_device *dev;
 723         ax25_uid_assoc *user;
 724         int n, err = 0;
 725
 726         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 727                 return -EINVAL;
 728
 729         if (addr->srose_family != AF_ROSE)
 730                 return -EINVAL;
 731
 732         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 733                 return -EINVAL;
 734
 735         if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
 736                 return -EINVAL;
 737
 738         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 739         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 740                 return -EINVAL;
 741
 742         lock_sock(sk);
 743
 744         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 745                 /* Connect completed during a ERESTARTSYS event */
 746                 sock->state = SS_CONNECTED;
 747                 goto out_release;
 748         }
 749
 750         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 751                 sock->state = SS_UNCONNECTED;
 752                 err = -ECONNREFUSED;
 753                 goto out_release;
 754         }
 755
 756         if (sk->sk_state == TCP_ESTABLISHED) {
 757                 /* No reconnect on a seqpacket socket */
 758                 err = -EISCONN;
 759                 goto out_release;
 760         }
 761
 762         sk->sk_state   = TCP_CLOSE;
 763         sock->state = SS_UNCONNECTED;
 764
 765         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 766                                          &diagnostic, 0);
 767         if (!rose->neighbour) {
 768                 err = -ENETUNREACH;
 769                 goto out_release;
 770         }
 771
 772         rose->lci = rose_new_lci(rose->neighbour);
 773         if (!rose->lci) {
 774                 err = -ENETUNREACH;
 775                 goto out_release;
 776         }
 777
 778         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 779                 sock_reset_flag(sk, SOCK_ZAPPED);
 780
 781                 if ((dev = rose_dev_first()) == NULL) {
 782                         err = -ENETUNREACH;
 783                         goto out_release;
 784                 }
 785
 786                 user = ax25_findbyuid(current_euid());
 787                 if (!user) {
 788                         err = -EINVAL;
 789                         goto out_release;
 790                 }
 791
 792                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 793                 rose->source_call = user->call;
 794                 rose->device      = dev;
 795                 ax25_uid_put(user);
 796
 797                 rose_insert_socket(sk);         /* Finish the bind */
 798         }
 799         rose->dest_addr   = addr->srose_addr;
 800         rose->dest_call   = addr->srose_call;
 801         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 802         rose->dest_ndigis = addr->srose_ndigis;
 803
 804         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 805                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 806                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 807                         rose->dest_digis[n] = full_addr->srose_digis[n];
 808         } else {
 809                 if (rose->dest_ndigis == 1) {
 810                         rose->dest_digis[0] = addr->srose_digi;
 811                 }
 812         }
 813
 814         /* Move to connecting socket, start sending Connect Requests */
 815         sock->state   = SS_CONNECTING;
 816         sk->sk_state     = TCP_SYN_SENT;
 817
 818         rose->state = ROSE_STATE_1;
 819
 820         rose->neighbour->use++;
 821
 822         rose_write_internal(sk, ROSE_CALL_REQUEST);
 823         rose_start_heartbeat(sk);
 824         rose_start_t1timer(sk);
 825
 826         /* Now the loop */
 827         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 828                 err = -EINPROGRESS;
 829                 goto out_release;
 830         }
 831
 832         /*
 833          * A Connect Ack with Choke or timeout or failed routing will go to
 834          * closed.
 835          */
 836         if (sk->sk_state == TCP_SYN_SENT) {
 837                 DEFINE_WAIT(wait);
 838
 839                 for (;;) {
 840                         prepare_to_wait(sk_sleep(sk), &wait,
 841                                         TASK_INTERRUPTIBLE);
 842                         if (sk->sk_state != TCP_SYN_SENT)
 843                                 break;
 844                         if (!signal_pending(current)) {
 845                                 release_sock(sk);
 846                                 schedule();
 847                                 lock_sock(sk);
 848                                 continue;
 849                         }
 850                         err = -ERESTARTSYS;
 851                         break;
 852                 }
 853                 finish_wait(sk_sleep(sk), &wait);
 854
 855                 if (err)
 856                         goto out_release;
 857         }
 858
 859         if (sk->sk_state != TCP_ESTABLISHED) {
 860                 sock->state = SS_UNCONNECTED;
 861                 err = sock_error(sk);   /* Always set at this point */
 862                 goto out_release;
 863         }
 864
 865         sock->state = SS_CONNECTED;
 866
 867 out_release:
 868         release_sock(sk);
 869
 870         return err;
 871 }
 872
 873 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 874 {
 875         struct sk_buff *skb;
 876         struct sock *newsk;
 877         DEFINE_WAIT(wait);
 878         struct sock *sk;
 879         int err = 0;
 880
 881         if ((sk = sock->sk) == NULL)
 882                 return -EINVAL;
 883
 884         lock_sock(sk);
 885         if (sk->sk_type != SOCK_SEQPACKET) {
 886                 err = -EOPNOTSUPP;
 887                 goto out_release;
 888         }
 889
 890         if (sk->sk_state != TCP_LISTEN) {
 891                 err = -EINVAL;
 892                 goto out_release;
 893         }
 894
 895         /*
 896          *      The write queue this time is holding sockets ready to use
 897          *      hooked into the SABM we saved
 898          */
 899         for (;;) {
 900                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 901
 902                 skb = skb_dequeue(&sk->sk_receive_queue);
 903                 if (skb)
 904                         break;
 905
 906                 if (flags & O_NONBLOCK) {
 907                         err = -EWOULDBLOCK;
 908                         break;
 909                 }
 910                 if (!signal_pending(current)) {
 911                         release_sock(sk);
 912                         schedule();
 913                         lock_sock(sk);
 914                         continue;
 915                 }
 916                 err = -ERESTARTSYS;
 917                 break;
 918         }
 919         finish_wait(sk_sleep(sk), &wait);
 920         if (err)
 921                 goto out_release;
 922
 923         newsk = skb->sk;
 924         sock_graft(newsk, newsock);
 925
 926         /* Now attach up the new socket */
 927         skb->sk = NULL;
 928         kfree_skb(skb);
 929         sk->sk_ack_backlog--;
 930
 931 out_release:
 932         release_sock(sk);
 933
 934         return err;
 935 }
 936
 937 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 938         int *uaddr_len, int peer)
 939 {
 940         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 941         struct sock *sk = sock->sk;
 942         struct rose_sock *rose = rose_sk(sk);
 943         int n;
 944
 945         memset(srose, 0, sizeof(*srose));
 946         if (peer != 0) {
 947                 if (sk->sk_state != TCP_ESTABLISHED)
 948                         return -ENOTCONN;
 949                 srose->srose_family = AF_ROSE;
 950                 srose->srose_addr   = rose->dest_addr;
 951                 srose->srose_call   = rose->dest_call;
 952                 srose->srose_ndigis = rose->dest_ndigis;
 953                 for (n = 0; n < rose->dest_ndigis; n++)
 954                         srose->srose_digis[n] = rose->dest_digis[n];
 955         } else {
 956                 srose->srose_family = AF_ROSE;
 957                 srose->srose_addr   = rose->source_addr;
 958                 srose->srose_call   = rose->source_call;
 959                 srose->srose_ndigis = rose->source_ndigis;
 960                 for (n = 0; n < rose->source_ndigis; n++)
 961                         srose->srose_digis[n] = rose->source_digis[n];
 962         }
 963
 964         *uaddr_len = sizeof(struct full_sockaddr_rose);
 965         return 0;
 966 }
 967
 968 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 969 {
 970         struct sock *sk;
 971         struct sock *make;
 972         struct rose_sock *make_rose;
 973         struct rose_facilities_struct facilities;
 974         int n;
 975
 976         skb->sk = NULL;         /* Initially we don't know who it's for */
 977
 978         /*
 979          *      skb->data points to the rose frame start
 980          */
 981         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 982
 983         if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
 984                                    skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
 985                                    &facilities)) {
 986                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 987                 return 0;
 988         }
 989
 990         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
 991
 992         /*
 993          * We can't accept the Call Request.
 994          */
 995         if (sk == NULL || sk_acceptq_is_full(sk) ||
 996             (make = rose_make_new(sk)) == NULL) {
 997                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
 998                 return 0;
 999         }
1000
1001         skb->sk     = make;
1002         make->sk_state = TCP_ESTABLISHED;
1003         make_rose = rose_sk(make);
1004
1005         make_rose->lci           = lci;
1006         make_rose->dest_addr     = facilities.dest_addr;
1007         make_rose->dest_call     = facilities.dest_call;
1008         make_rose->dest_ndigis   = facilities.dest_ndigis;
1009         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1010                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1011         make_rose->source_addr   = facilities.source_addr;
1012         make_rose->source_call   = facilities.source_call;
1013         make_rose->source_ndigis = facilities.source_ndigis;
1014         for (n = 0 ; n < facilities.source_ndigis ; n++)
1015                 make_rose->source_digis[n] = facilities.source_digis[n];
1016         make_rose->neighbour     = neigh;
1017         make_rose->device        = dev;
1018         make_rose->facilities    = facilities;
1019
1020         make_rose->neighbour->use++;
1021
1022         if (rose_sk(sk)->defer) {
1023                 make_rose->state = ROSE_STATE_5;
1024         } else {
1025                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1026                 make_rose->state = ROSE_STATE_3;
1027                 rose_start_idletimer(make);
1028         }
1029
1030         make_rose->condition = 0x00;
1031         make_rose->vs        = 0;
1032         make_rose->va        = 0;
1033         make_rose->vr        = 0;
1034         make_rose->vl        = 0;
1035         sk->sk_ack_backlog++;
1036
1037         rose_insert_socket(make);
1038
1039         skb_queue_head(&sk->sk_receive_queue, skb);
1040
1041         rose_start_heartbeat(make);
1042
1043         if (!sock_flag(sk, SOCK_DEAD))
1044                 sk->sk_data_ready(sk);
1045
1046         return 1;
1047 }
1048
1049 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1050                         struct msghdr *msg, size_t len)
1051 {
1052         struct sock *sk = sock->sk;
1053         struct rose_sock *rose = rose_sk(sk);
1054         DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1055         int err;
1056         struct full_sockaddr_rose srose;
1057         struct sk_buff *skb;
1058         unsigned char *asmptr;
1059         int n, size, qbit = 0;
1060
1061         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1062                 return -EINVAL;
1063
1064         if (sock_flag(sk, SOCK_ZAPPED))
1065                 return -EADDRNOTAVAIL;
1066
1067         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1068                 send_sig(SIGPIPE, current, 0);
1069                 return -EPIPE;
1070         }
1071
1072         if (rose->neighbour == NULL || rose->device == NULL)
1073                 return -ENETUNREACH;
1074
1075         if (usrose != NULL) {
1076                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1077                         return -EINVAL;
1078                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1079                 memcpy(&srose, usrose, msg->msg_namelen);
1080                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1081                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1082                         return -EISCONN;
1083                 if (srose.srose_ndigis != rose->dest_ndigis)
1084                         return -EISCONN;
1085                 if (srose.srose_ndigis == rose->dest_ndigis) {
1086                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1087                                 if (ax25cmp(&rose->dest_digis[n],
1088                                             &srose.srose_digis[n]))
1089                                         return -EISCONN;
1090                 }
1091                 if (srose.srose_family != AF_ROSE)
1092                         return -EINVAL;
1093         } else {
1094                 if (sk->sk_state != TCP_ESTABLISHED)
1095                         return -ENOTCONN;
1096
1097                 srose.srose_family = AF_ROSE;
1098                 srose.srose_addr   = rose->dest_addr;
1099                 srose.srose_call   = rose->dest_call;
1100                 srose.srose_ndigis = rose->dest_ndigis;
1101                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1102                         srose.srose_digis[n] = rose->dest_digis[n];
1103         }
1104
1105         /* Build a packet */
1106         /* Sanity check the packet size */
1107         if (len > 65535)
1108                 return -EMSGSIZE;
1109
1110         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1111
1112         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1113                 return err;
1114
1115         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1116
1117         /*
1118          *      Put the data on the end
1119          */
1120
1121         skb_reset_transport_header(skb);
1122         skb_put(skb, len);
1123
1124         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1125         if (err) {
1126                 kfree_skb(skb);
1127                 return err;
1128         }
1129
1130         /*
1131          *      If the Q BIT Include socket option is in force, the first
1132          *      byte of the user data is the logical value of the Q Bit.
1133          */
1134         if (rose->qbitincl) {
1135                 qbit = skb->data[0];
1136                 skb_pull(skb, 1);
1137         }
1138
1139         /*
1140          *      Push down the ROSE header
1141          */
1142         asmptr = skb_push(skb, ROSE_MIN_LEN);
1143
1144         /* Build a ROSE Network header */
1145         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1146         asmptr[1] = (rose->lci >> 0) & 0xFF;
1147         asmptr[2] = ROSE_DATA;
1148
1149         if (qbit)
1150                 asmptr[0] |= ROSE_Q_BIT;
1151
1152         if (sk->sk_state != TCP_ESTABLISHED) {
1153                 kfree_skb(skb);
1154                 return -ENOTCONN;
1155         }
1156
1157 #ifdef M_BIT
1158 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1159         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1160                 unsigned char header[ROSE_MIN_LEN];
1161                 struct sk_buff *skbn;
1162                 int frontlen;
1163                 int lg;
1164
1165                 /* Save a copy of the Header */
1166                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1167                 skb_pull(skb, ROSE_MIN_LEN);
1168
1169                 frontlen = skb_headroom(skb);
1170
1171                 while (skb->len > 0) {
1172                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1173                                 kfree_skb(skb);
1174                                 return err;
1175                         }
1176
1177                         skbn->sk   = sk;
1178                         skbn->free = 1;
1179                         skbn->arp  = 1;
1180
1181                         skb_reserve(skbn, frontlen);
1182
1183                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1184
1185                         /* Copy the user data */
1186                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1187                         skb_pull(skb, lg);
1188
1189                         /* Duplicate the Header */
1190                         skb_push(skbn, ROSE_MIN_LEN);
1191                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1192
1193                         if (skb->len > 0)
1194                                 skbn->data[2] |= M_BIT;
1195
1196                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1197                 }
1198
1199                 skb->free = 1;
1200                 kfree_skb(skb);
1201         } else {
1202                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1203         }
1204 #else
1205         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1206 #endif
1207
1208         rose_kick(sk);
1209
1210         return len;
1211 }
1212
1213
1214 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1215                         struct msghdr *msg, size_t size, int flags)
1216 {
1217         struct sock *sk = sock->sk;
1218         struct rose_sock *rose = rose_sk(sk);
1219         size_t copied;
1220         unsigned char *asmptr;
1221         struct sk_buff *skb;
1222         int n, er, qbit;
1223
1224         /*
1225          * This works for seqpacket too. The receiver has ordered the queue for
1226          * us! We do one quick check first though
1227          */
1228         if (sk->sk_state != TCP_ESTABLISHED)
1229                 return -ENOTCONN;
1230
1231         /* Now we can treat all alike */
1232         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233                 return er;
1234
1235         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1236
1237         skb_pull(skb, ROSE_MIN_LEN);
1238
1239         if (rose->qbitincl) {
1240                 asmptr  = skb_push(skb, 1);
1241                 *asmptr = qbit;
1242         }
1243
1244         skb_reset_transport_header(skb);
1245         copied     = skb->len;
1246
1247         if (copied > size) {
1248                 copied = size;
1249                 msg->msg_flags |= MSG_TRUNC;
1250         }
1251
1252         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1253
1254         if (msg->msg_name) {
1255                 struct sockaddr_rose *srose;
1256                 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1257                                  msg->msg_name);
1258
1259                 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1260                 srose = msg->msg_name;
1261                 srose->srose_family = AF_ROSE;
1262                 srose->srose_addr   = rose->dest_addr;
1263                 srose->srose_call   = rose->dest_call;
1264                 srose->srose_ndigis = rose->dest_ndigis;
1265                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1266                         full_srose->srose_digis[n] = rose->dest_digis[n];
1267                 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1268         }
1269
1270         skb_free_datagram(sk, skb);
1271
1272         return copied;
1273 }
1274
1275
1276 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1277 {
1278         struct sock *sk = sock->sk;
1279         struct rose_sock *rose = rose_sk(sk);
1280         void __user *argp = (void __user *)arg;
1281
1282         switch (cmd) {
1283         case TIOCOUTQ: {
1284                 long amount;
1285
1286                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1287                 if (amount < 0)
1288                         amount = 0;
1289                 return put_user(amount, (unsigned int __user *) argp);
1290         }
1291
1292         case TIOCINQ: {
1293                 struct sk_buff *skb;
1294                 long amount = 0L;
1295                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1296                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1297                         amount = skb->len;
1298                 return put_user(amount, (unsigned int __user *) argp);
1299         }
1300
1301         case SIOCGSTAMP:
1302                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1303
1304         case SIOCGSTAMPNS:
1305                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1306
1307         case SIOCGIFADDR:
1308         case SIOCSIFADDR:
1309         case SIOCGIFDSTADDR:
1310         case SIOCSIFDSTADDR:
1311         case SIOCGIFBRDADDR:
1312         case SIOCSIFBRDADDR:
1313         case SIOCGIFNETMASK:
1314         case SIOCSIFNETMASK:
1315         case SIOCGIFMETRIC:
1316         case SIOCSIFMETRIC:
1317                 return -EINVAL;
1318
1319         case SIOCADDRT:
1320         case SIOCDELRT:
1321         case SIOCRSCLRRT:
1322                 if (!capable(CAP_NET_ADMIN))
1323                         return -EPERM;
1324                 return rose_rt_ioctl(cmd, argp);
1325
1326         case SIOCRSGCAUSE: {
1327                 struct rose_cause_struct rose_cause;
1328                 rose_cause.cause      = rose->cause;
1329                 rose_cause.diagnostic = rose->diagnostic;
1330                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1331         }
1332
1333         case SIOCRSSCAUSE: {
1334                 struct rose_cause_struct rose_cause;
1335                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1336                         return -EFAULT;
1337                 rose->cause      = rose_cause.cause;
1338                 rose->diagnostic = rose_cause.diagnostic;
1339                 return 0;
1340         }
1341
1342         case SIOCRSSL2CALL:
1343                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1344                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1345                         ax25_listen_release(&rose_callsign, NULL);
1346                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1347                         return -EFAULT;
1348                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1349                         return ax25_listen_register(&rose_callsign, NULL);
1350
1351                 return 0;
1352
1353         case SIOCRSGL2CALL:
1354                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1355
1356         case SIOCRSACCEPT:
1357                 if (rose->state == ROSE_STATE_5) {
1358                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1359                         rose_start_idletimer(sk);
1360                         rose->condition = 0x00;
1361                         rose->vs        = 0;
1362                         rose->va        = 0;
1363                         rose->vr        = 0;
1364                         rose->vl        = 0;
1365                         rose->state     = ROSE_STATE_3;
1366                 }
1367                 return 0;
1368
1369         default:
1370                 return -ENOIOCTLCMD;
1371         }
1372
1373         return 0;
1374 }
1375
1376 #ifdef CONFIG_PROC_FS
1377 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1378         __acquires(rose_list_lock)
1379 {
1380         spin_lock_bh(&rose_list_lock);
1381         return seq_hlist_start_head(&rose_list, *pos);
1382 }
1383
1384 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1385 {
1386         return seq_hlist_next(v, &rose_list, pos);
1387 }
1388
1389 static void rose_info_stop(struct seq_file *seq, void *v)
1390         __releases(rose_list_lock)
1391 {
1392         spin_unlock_bh(&rose_list_lock);
1393 }
1394
1395 static int rose_info_show(struct seq_file *seq, void *v)
1396 {
1397         char buf[11], rsbuf[11];
1398
1399         if (v == SEQ_START_TOKEN)
1400                 seq_puts(seq,
1401                          "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");
1402
1403         else {
1404                 struct sock *s = sk_entry(v);
1405                 struct rose_sock *rose = rose_sk(s);
1406                 const char *devname, *callsign;
1407                 const struct net_device *dev = rose->device;
1408
1409                 if (!dev)
1410                         devname = "???";
1411                 else
1412                         devname = dev->name;
1413
1414                 seq_printf(seq, "%-10s %-9s ",
1415                            rose2asc(rsbuf, &rose->dest_addr),
1416                            ax2asc(buf, &rose->dest_call));
1417
1418                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1419                         callsign = "??????-?";
1420                 else
1421                         callsign = ax2asc(buf, &rose->source_call);
1422
1423                 seq_printf(seq,
1424                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1425                         rose2asc(rsbuf, &rose->source_addr),
1426                         callsign,
1427                         devname,
1428                         rose->lci & 0x0FFF,
1429                         (rose->neighbour) ? rose->neighbour->number : 0,
1430                         rose->state,
1431                         rose->vs,
1432                         rose->vr,
1433                         rose->va,
1434                         ax25_display_timer(&rose->timer) / HZ,
1435                         rose->t1 / HZ,
1436                         rose->t2 / HZ,
1437                         rose->t3 / HZ,
1438                         rose->hb / HZ,
1439                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1440                         rose->idle / (60 * HZ),
1441                         sk_wmem_alloc_get(s),
1442                         sk_rmem_alloc_get(s),
1443                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1444         }
1445
1446         return 0;
1447 }
1448
1449 static const struct seq_operations rose_info_seqops = {
1450         .start = rose_info_start,
1451         .next = rose_info_next,
1452         .stop = rose_info_stop,
1453         .show = rose_info_show,
1454 };
1455
1456 static int rose_info_open(struct inode *inode, struct file *file)
1457 {
1458         return seq_open(file, &rose_info_seqops);
1459 }
1460
1461 static const struct file_operations rose_info_fops = {
1462         .owner = THIS_MODULE,
1463         .open = rose_info_open,
1464         .read = seq_read,
1465         .llseek = seq_lseek,
1466         .release = seq_release,
1467 };
1468 #endif  /* CONFIG_PROC_FS */
1469
1470 static const struct net_proto_family rose_family_ops = {
1471         .family         =       PF_ROSE,
1472         .create         =       rose_create,
1473         .owner          =       THIS_MODULE,
1474 };
1475
1476 static const struct proto_ops rose_proto_ops = {
1477         .family         =       PF_ROSE,
1478         .owner          =       THIS_MODULE,
1479         .release        =       rose_release,
1480         .bind           =       rose_bind,
1481         .connect        =       rose_connect,
1482         .socketpair     =       sock_no_socketpair,
1483         .accept         =       rose_accept,
1484         .getname        =       rose_getname,
1485         .poll           =       datagram_poll,
1486         .ioctl          =       rose_ioctl,
1487         .listen         =       rose_listen,
1488         .shutdown       =       sock_no_shutdown,
1489         .setsockopt     =       rose_setsockopt,
1490         .getsockopt     =       rose_getsockopt,
1491         .sendmsg        =       rose_sendmsg,
1492         .recvmsg        =       rose_recvmsg,
1493         .mmap           =       sock_no_mmap,
1494         .sendpage       =       sock_no_sendpage,
1495 };
1496
1497 static struct notifier_block rose_dev_notifier = {
1498         .notifier_call  =       rose_device_event,
1499 };
1500
1501 static struct net_device **dev_rose;
1502
1503 static struct ax25_protocol rose_pid = {
1504         .pid    = AX25_P_ROSE,
1505         .func   = rose_route_frame
1506 };
1507
1508 static struct ax25_linkfail rose_linkfail_notifier = {
1509         .func   = rose_link_failed
1510 };
1511
1512 static int __init rose_proto_init(void)
1513 {
1514         int i;
1515         int rc;
1516
1517         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1518                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1519                 rc = -EINVAL;
1520                 goto out;
1521         }
1522
1523         rc = proto_register(&rose_proto, 0);
1524         if (rc != 0)
1525                 goto out;
1526
1527         rose_callsign = null_ax25_address;
1528
1529         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1530         if (dev_rose == NULL) {
1531                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1532                 rc = -ENOMEM;
1533                 goto out_proto_unregister;
1534         }
1535
1536         for (i = 0; i < rose_ndevs; i++) {
1537                 struct net_device *dev;
1538                 char name[IFNAMSIZ];
1539
1540                 sprintf(name, "rose%d", i);
1541                 dev = alloc_netdev(0, name, rose_setup);
1542                 if (!dev) {
1543                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1544                         rc = -ENOMEM;
1545                         goto fail;
1546                 }
1547                 rc = register_netdev(dev);
1548                 if (rc) {
1549                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1550                         free_netdev(dev);
1551                         goto fail;
1552                 }
1553                 rose_set_lockdep_key(dev);
1554                 dev_rose[i] = dev;
1555         }
1556
1557         sock_register(&rose_family_ops);
1558         register_netdevice_notifier(&rose_dev_notifier);
1559
1560         ax25_register_pid(&rose_pid);
1561         ax25_linkfail_register(&rose_linkfail_notifier);
1562
1563 #ifdef CONFIG_SYSCTL
1564         rose_register_sysctl();
1565 #endif
1566         rose_loopback_init();
1567
1568         rose_add_loopback_neigh();
1569
1570         proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1571         proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1572                     &rose_neigh_fops);
1573         proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1574                     &rose_nodes_fops);
1575         proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1576                     &rose_routes_fops);
1577 out:
1578         return rc;
1579 fail:
1580         while (--i >= 0) {
1581                 unregister_netdev(dev_rose[i]);
1582                 free_netdev(dev_rose[i]);
1583         }
1584         kfree(dev_rose);
1585 out_proto_unregister:
1586         proto_unregister(&rose_proto);
1587         goto out;
1588 }
1589 module_init(rose_proto_init);
1590
1591 module_param(rose_ndevs, int, 0);
1592 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1593
1594 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1595 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1596 MODULE_LICENSE("GPL");
1597 MODULE_ALIAS_NETPROTO(PF_ROSE);
1598
1599 static void __exit rose_exit(void)
1600 {
1601         int i;
1602
1603         remove_proc_entry("rose", init_net.proc_net);
1604         remove_proc_entry("rose_neigh", init_net.proc_net);
1605         remove_proc_entry("rose_nodes", init_net.proc_net);
1606         remove_proc_entry("rose_routes", init_net.proc_net);
1607         rose_loopback_clear();
1608
1609         rose_rt_free();
1610
1611         ax25_protocol_release(AX25_P_ROSE);
1612         ax25_linkfail_release(&rose_linkfail_notifier);
1613
1614         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1615                 ax25_listen_release(&rose_callsign, NULL);
1616
1617 #ifdef CONFIG_SYSCTL
1618         rose_unregister_sysctl();
1619 #endif
1620         unregister_netdevice_notifier(&rose_dev_notifier);
1621
1622         sock_unregister(PF_ROSE);
1623
1624         for (i = 0; i < rose_ndevs; i++) {
1625                 struct net_device *dev = dev_rose[i];
1626
1627                 if (dev) {
1628                         unregister_netdev(dev);
1629                         free_netdev(dev);
1630                 }
1631         }
1632
1633         kfree(dev_rose);
1634         proto_unregister(&rose_proto);
1635 }
1636
1637 module_exit(rose_exit);