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/system.h>
  38 #include <asm/uaccess.h>
  39 #include <linux/fcntl.h>
  40 #include <linux/termios.h>
  41 #include <linux/mm.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/notifier.h>
  44 #include <net/rose.h>
  45 #include <linux/proc_fs.h>
  46 #include <linux/seq_file.h>
  47 #include <net/tcp_states.h>
  48 #include <net/ip.h>
  49 #include <net/arp.h>
  50
  51 static int rose_ndevs = 10;
  52
  53 int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
  54 int sysctl_rose_call_request_timeout    = ROSE_DEFAULT_T1;
  55 int sysctl_rose_reset_request_timeout   = ROSE_DEFAULT_T2;
  56 int sysctl_rose_clear_request_timeout   = ROSE_DEFAULT_T3;
  57 int sysctl_rose_no_activity_timeout     = ROSE_DEFAULT_IDLE;
  58 int sysctl_rose_ack_hold_back_timeout   = ROSE_DEFAULT_HB;
  59 int sysctl_rose_routing_control         = ROSE_DEFAULT_ROUTING;
  60 int sysctl_rose_link_fail_timeout       = ROSE_DEFAULT_FAIL_TIMEOUT;
  61 int sysctl_rose_maximum_vcs             = ROSE_DEFAULT_MAXVC;
  62 int sysctl_rose_window_size             = ROSE_DEFAULT_WINDOW_SIZE;
  63
  64 static HLIST_HEAD(rose_list);
  65 static DEFINE_SPINLOCK(rose_list_lock);
  66
  67 static const struct proto_ops rose_proto_ops;
  68
  69 ax25_address rose_callsign;
  70
  71 /*
  72  * ROSE network devices are virtual network devices encapsulating ROSE
  73  * frames into AX.25 which will be sent through an AX.25 device, so form a
  74  * special "super class" of normal net devices; split their locks off into a
  75  * separate class since they always nest.
  76  */
  77 static struct lock_class_key rose_netdev_xmit_lock_key;
  78 static struct lock_class_key rose_netdev_addr_lock_key;
  79
  80 static void rose_set_lockdep_one(struct net_device *dev,
  81                                  struct netdev_queue *txq,
  82                                  void *_unused)
  83 {
  84         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
  85 }
  86
  87 static void rose_set_lockdep_key(struct net_device *dev)
  88 {
  89         lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
  90         netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
  91 }
  92
  93 /*
  94  *      Convert a ROSE address into text.
  95  */
  96 char *rose2asc(char *buf, const rose_address *addr)
  97 {
  98         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  99             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
 100             addr->rose_addr[4] == 0x00) {
 101                 strcpy(buf, "*");
 102         } else {
 103                 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 104                                                 addr->rose_addr[1] & 0xFF,
 105                                                 addr->rose_addr[2] & 0xFF,
 106                                                 addr->rose_addr[3] & 0xFF,
 107                                                 addr->rose_addr[4] & 0xFF);
 108         }
 109
 110         return buf;
 111 }
 112
 113 /*
 114  *      Compare two ROSE addresses, 0 == equal.
 115  */
 116 int rosecmp(rose_address *addr1, rose_address *addr2)
 117 {
 118         int i;
 119
 120         for (i = 0; i < 5; i++)
 121                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 122                         return 1;
 123
 124         return 0;
 125 }
 126
 127 /*
 128  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 129  */
 130 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 131 {
 132         unsigned int i, j;
 133
 134         if (mask > 10)
 135                 return 1;
 136
 137         for (i = 0; i < mask; i++) {
 138                 j = i / 2;
 139
 140                 if ((i % 2) != 0) {
 141                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 142                                 return 1;
 143                 } else {
 144                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 145                                 return 1;
 146                 }
 147         }
 148
 149         return 0;
 150 }
 151
 152 /*
 153  *      Socket removal during an interrupt is now safe.
 154  */
 155 static void rose_remove_socket(struct sock *sk)
 156 {
 157         spin_lock_bh(&rose_list_lock);
 158         sk_del_node_init(sk);
 159         spin_unlock_bh(&rose_list_lock);
 160 }
 161
 162 /*
 163  *      Kill all bound sockets on a broken link layer connection to a
 164  *      particular neighbour.
 165  */
 166 void rose_kill_by_neigh(struct rose_neigh *neigh)
 167 {
 168         struct sock *s;
 169         struct hlist_node *node;
 170
 171         spin_lock_bh(&rose_list_lock);
 172         sk_for_each(s, node, &rose_list) {
 173                 struct rose_sock *rose = rose_sk(s);
 174
 175                 if (rose->neighbour == neigh) {
 176                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 177                         rose->neighbour->use--;
 178                         rose->neighbour = NULL;
 179                 }
 180         }
 181         spin_unlock_bh(&rose_list_lock);
 182 }
 183
 184 /*
 185  *      Kill all bound sockets on a dropped device.
 186  */
 187 static void rose_kill_by_device(struct net_device *dev)
 188 {
 189         struct sock *s;
 190         struct hlist_node *node;
 191
 192         spin_lock_bh(&rose_list_lock);
 193         sk_for_each(s, node, &rose_list) {
 194                 struct rose_sock *rose = rose_sk(s);
 195
 196                 if (rose->device == dev) {
 197                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 198                         rose->neighbour->use--;
 199                         rose->device = NULL;
 200                 }
 201         }
 202         spin_unlock_bh(&rose_list_lock);
 203 }
 204
 205 /*
 206  *      Handle device status changes.
 207  */
 208 static int rose_device_event(struct notifier_block *this, unsigned long event,
 209         void *ptr)
 210 {
 211         struct net_device *dev = (struct net_device *)ptr;
 212
 213         if (!net_eq(dev_net(dev), &init_net))
 214                 return NOTIFY_DONE;
 215
 216         if (event != NETDEV_DOWN)
 217                 return NOTIFY_DONE;
 218
 219         switch (dev->type) {
 220         case ARPHRD_ROSE:
 221                 rose_kill_by_device(dev);
 222                 break;
 223         case ARPHRD_AX25:
 224                 rose_link_device_down(dev);
 225                 rose_rt_device_down(dev);
 226                 break;
 227         }
 228
 229         return NOTIFY_DONE;
 230 }
 231
 232 /*
 233  *      Add a socket to the bound sockets list.
 234  */
 235 static void rose_insert_socket(struct sock *sk)
 236 {
 237
 238         spin_lock_bh(&rose_list_lock);
 239         sk_add_node(sk, &rose_list);
 240         spin_unlock_bh(&rose_list_lock);
 241 }
 242
 243 /*
 244  *      Find a socket that wants to accept the Call Request we just
 245  *      received.
 246  */
 247 static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
 248 {
 249         struct sock *s;
 250         struct hlist_node *node;
 251
 252         spin_lock_bh(&rose_list_lock);
 253         sk_for_each(s, node, &rose_list) {
 254                 struct rose_sock *rose = rose_sk(s);
 255
 256                 if (!rosecmp(&rose->source_addr, addr) &&
 257                     !ax25cmp(&rose->source_call, call) &&
 258                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 259                         goto found;
 260         }
 261
 262         sk_for_each(s, node, &rose_list) {
 263                 struct rose_sock *rose = rose_sk(s);
 264
 265                 if (!rosecmp(&rose->source_addr, addr) &&
 266                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 267                     s->sk_state == TCP_LISTEN)
 268                         goto found;
 269         }
 270         s = NULL;
 271 found:
 272         spin_unlock_bh(&rose_list_lock);
 273         return s;
 274 }
 275
 276 /*
 277  *      Find a connected ROSE socket given my LCI and device.
 278  */
 279 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 280 {
 281         struct sock *s;
 282         struct hlist_node *node;
 283
 284         spin_lock_bh(&rose_list_lock);
 285         sk_for_each(s, node, &rose_list) {
 286                 struct rose_sock *rose = rose_sk(s);
 287
 288                 if (rose->lci == lci && rose->neighbour == neigh)
 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 unique LCI for a given device.
 299  */
 300 unsigned int rose_new_lci(struct rose_neigh *neigh)
 301 {
 302         int lci;
 303
 304         if (neigh->dce_mode) {
 305                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 306                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 307                                 return lci;
 308         } else {
 309                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 310                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 311                                 return lci;
 312         }
 313
 314         return 0;
 315 }
 316
 317 /*
 318  *      Deferred destroy.
 319  */
 320 void rose_destroy_socket(struct sock *);
 321
 322 /*
 323  *      Handler for deferred kills.
 324  */
 325 static void rose_destroy_timer(unsigned long data)
 326 {
 327         rose_destroy_socket((struct sock *)data);
 328 }
 329
 330 /*
 331  *      This is called from user mode and the timers. Thus it protects itself
 332  *      against interrupt users but doesn't worry about being called during
 333  *      work.  Once it is removed from the queue no interrupt or bottom half
 334  *      will touch it and we are (fairly 8-) ) safe.
 335  */
 336 void rose_destroy_socket(struct sock *sk)
 337 {
 338         struct sk_buff *skb;
 339
 340         rose_remove_socket(sk);
 341         rose_stop_heartbeat(sk);
 342         rose_stop_idletimer(sk);
 343         rose_stop_timer(sk);
 344
 345         rose_clear_queues(sk);          /* Flush the queues */
 346
 347         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 348                 if (skb->sk != sk) {    /* A pending connection */
 349                         /* Queue the unaccepted socket for death */
 350                         sock_set_flag(skb->sk, SOCK_DEAD);
 351                         rose_start_heartbeat(skb->sk);
 352                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 353                 }
 354
 355                 kfree_skb(skb);
 356         }
 357
 358         if (sk_has_allocations(sk)) {
 359                 /* Defer: outstanding buffers */
 360                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 361                                 (unsigned long)sk);
 362                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 363                 add_timer(&sk->sk_timer);
 364         } else
 365                 sock_put(sk);
 366 }
 367
 368 /*
 369  *      Handling for system calls applied via the various interfaces to a
 370  *      ROSE socket object.
 371  */
 372
 373 static int rose_setsockopt(struct socket *sock, int level, int optname,
 374         char __user *optval, unsigned int optlen)
 375 {
 376         struct sock *sk = sock->sk;
 377         struct rose_sock *rose = rose_sk(sk);
 378         int opt;
 379
 380         if (level != SOL_ROSE)
 381                 return -ENOPROTOOPT;
 382
 383         if (optlen < sizeof(int))
 384                 return -EINVAL;
 385
 386         if (get_user(opt, (int __user *)optval))
 387                 return -EFAULT;
 388
 389         switch (optname) {
 390         case ROSE_DEFER:
 391                 rose->defer = opt ? 1 : 0;
 392                 return 0;
 393
 394         case ROSE_T1:
 395                 if (opt < 1)
 396                         return -EINVAL;
 397                 rose->t1 = opt * HZ;
 398                 return 0;
 399
 400         case ROSE_T2:
 401                 if (opt < 1)
 402                         return -EINVAL;
 403                 rose->t2 = opt * HZ;
 404                 return 0;
 405
 406         case ROSE_T3:
 407                 if (opt < 1)
 408                         return -EINVAL;
 409                 rose->t3 = opt * HZ;
 410                 return 0;
 411
 412         case ROSE_HOLDBACK:
 413                 if (opt < 1)
 414                         return -EINVAL;
 415                 rose->hb = opt * HZ;
 416                 return 0;
 417
 418         case ROSE_IDLE:
 419                 if (opt < 0)
 420                         return -EINVAL;
 421                 rose->idle = opt * 60 * HZ;
 422                 return 0;
 423
 424         case ROSE_QBITINCL:
 425                 rose->qbitincl = opt ? 1 : 0;
 426                 return 0;
 427
 428         default:
 429                 return -ENOPROTOOPT;
 430         }
 431 }
 432
 433 static int rose_getsockopt(struct socket *sock, int level, int optname,
 434         char __user *optval, int __user *optlen)
 435 {
 436         struct sock *sk = sock->sk;
 437         struct rose_sock *rose = rose_sk(sk);
 438         int val = 0;
 439         int len;
 440
 441         if (level != SOL_ROSE)
 442                 return -ENOPROTOOPT;
 443
 444         if (get_user(len, optlen))
 445                 return -EFAULT;
 446
 447         if (len < 0)
 448                 return -EINVAL;
 449
 450         switch (optname) {
 451         case ROSE_DEFER:
 452                 val = rose->defer;
 453                 break;
 454
 455         case ROSE_T1:
 456                 val = rose->t1 / HZ;
 457                 break;
 458
 459         case ROSE_T2:
 460                 val = rose->t2 / HZ;
 461                 break;
 462
 463         case ROSE_T3:
 464                 val = rose->t3 / HZ;
 465                 break;
 466
 467         case ROSE_HOLDBACK:
 468                 val = rose->hb / HZ;
 469                 break;
 470
 471         case ROSE_IDLE:
 472                 val = rose->idle / (60 * HZ);
 473                 break;
 474
 475         case ROSE_QBITINCL:
 476                 val = rose->qbitincl;
 477                 break;
 478
 479         default:
 480                 return -ENOPROTOOPT;
 481         }
 482
 483         len = min_t(unsigned int, len, sizeof(int));
 484
 485         if (put_user(len, optlen))
 486                 return -EFAULT;
 487
 488         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 489 }
 490
 491 static int rose_listen(struct socket *sock, int backlog)
 492 {
 493         struct sock *sk = sock->sk;
 494
 495         if (sk->sk_state != TCP_LISTEN) {
 496                 struct rose_sock *rose = rose_sk(sk);
 497
 498                 rose->dest_ndigis = 0;
 499                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 500                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 501                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 502                 sk->sk_max_ack_backlog = backlog;
 503                 sk->sk_state           = TCP_LISTEN;
 504                 return 0;
 505         }
 506
 507         return -EOPNOTSUPP;
 508 }
 509
 510 static struct proto rose_proto = {
 511         .name     = "ROSE",
 512         .owner    = THIS_MODULE,
 513         .obj_size = sizeof(struct rose_sock),
 514 };
 515
 516 static int rose_create(struct net *net, struct socket *sock, int protocol,
 517                        int kern)
 518 {
 519         struct sock *sk;
 520         struct rose_sock *rose;
 521
 522         if (!net_eq(net, &init_net))
 523                 return -EAFNOSUPPORT;
 524
 525         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 526                 return -ESOCKTNOSUPPORT;
 527
 528         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 529         if (sk == NULL)
 530                 return -ENOMEM;
 531
 532         rose = rose_sk(sk);
 533
 534         sock_init_data(sock, sk);
 535
 536         skb_queue_head_init(&rose->ack_queue);
 537 #ifdef M_BIT
 538         skb_queue_head_init(&rose->frag_queue);
 539         rose->fraglen    = 0;
 540 #endif
 541
 542         sock->ops    = &rose_proto_ops;
 543         sk->sk_protocol = protocol;
 544
 545         init_timer(&rose->timer);
 546         init_timer(&rose->idletimer);
 547
 548         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 549         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 550         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 551         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 552         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 553
 554         rose->state = ROSE_STATE_0;
 555
 556         return 0;
 557 }
 558
 559 static struct sock *rose_make_new(struct sock *osk)
 560 {
 561         struct sock *sk;
 562         struct rose_sock *rose, *orose;
 563
 564         if (osk->sk_type != SOCK_SEQPACKET)
 565                 return NULL;
 566
 567         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
 568         if (sk == NULL)
 569                 return NULL;
 570
 571         rose = rose_sk(sk);
 572
 573         sock_init_data(NULL, sk);
 574
 575         skb_queue_head_init(&rose->ack_queue);
 576 #ifdef M_BIT
 577         skb_queue_head_init(&rose->frag_queue);
 578         rose->fraglen  = 0;
 579 #endif
 580
 581         sk->sk_type     = osk->sk_type;
 582         sk->sk_priority = osk->sk_priority;
 583         sk->sk_protocol = osk->sk_protocol;
 584         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 585         sk->sk_sndbuf   = osk->sk_sndbuf;
 586         sk->sk_state    = TCP_ESTABLISHED;
 587         sock_copy_flags(sk, osk);
 588
 589         init_timer(&rose->timer);
 590         init_timer(&rose->idletimer);
 591
 592         orose           = rose_sk(osk);
 593         rose->t1        = orose->t1;
 594         rose->t2        = orose->t2;
 595         rose->t3        = orose->t3;
 596         rose->hb        = orose->hb;
 597         rose->idle      = orose->idle;
 598         rose->defer     = orose->defer;
 599         rose->device    = orose->device;
 600         rose->qbitincl  = orose->qbitincl;
 601
 602         return sk;
 603 }
 604
 605 static int rose_release(struct socket *sock)
 606 {
 607         struct sock *sk = sock->sk;
 608         struct rose_sock *rose;
 609
 610         if (sk == NULL) return 0;
 611
 612         sock_hold(sk);
 613         sock_orphan(sk);
 614         lock_sock(sk);
 615         rose = rose_sk(sk);
 616
 617         switch (rose->state) {
 618         case ROSE_STATE_0:
 619                 release_sock(sk);
 620                 rose_disconnect(sk, 0, -1, -1);
 621                 lock_sock(sk);
 622                 rose_destroy_socket(sk);
 623                 break;
 624
 625         case ROSE_STATE_2:
 626                 rose->neighbour->use--;
 627                 release_sock(sk);
 628                 rose_disconnect(sk, 0, -1, -1);
 629                 lock_sock(sk);
 630                 rose_destroy_socket(sk);
 631                 break;
 632
 633         case ROSE_STATE_1:
 634         case ROSE_STATE_3:
 635         case ROSE_STATE_4:
 636         case ROSE_STATE_5:
 637                 rose_clear_queues(sk);
 638                 rose_stop_idletimer(sk);
 639                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 640                 rose_start_t3timer(sk);
 641                 rose->state  = ROSE_STATE_2;
 642                 sk->sk_state    = TCP_CLOSE;
 643                 sk->sk_shutdown |= SEND_SHUTDOWN;
 644                 sk->sk_state_change(sk);
 645                 sock_set_flag(sk, SOCK_DEAD);
 646                 sock_set_flag(sk, SOCK_DESTROY);
 647                 break;
 648
 649         default:
 650                 break;
 651         }
 652
 653         sock->sk = NULL;
 654         release_sock(sk);
 655         sock_put(sk);
 656
 657         return 0;
 658 }
 659
 660 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 661 {
 662         struct sock *sk = sock->sk;
 663         struct rose_sock *rose = rose_sk(sk);
 664         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 665         struct net_device *dev;
 666         ax25_address *source;
 667         ax25_uid_assoc *user;
 668         int n;
 669
 670         if (!sock_flag(sk, SOCK_ZAPPED))
 671                 return -EINVAL;
 672
 673         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 674                 return -EINVAL;
 675
 676         if (addr->srose_family != AF_ROSE)
 677                 return -EINVAL;
 678
 679         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 680                 return -EINVAL;
 681
 682         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 683                 return -EINVAL;
 684
 685         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 686                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 687                 return -EADDRNOTAVAIL;
 688         }
 689
 690         source = &addr->srose_call;
 691
 692         user = ax25_findbyuid(current_euid());
 693         if (user) {
 694                 rose->source_call = user->call;
 695                 ax25_uid_put(user);
 696         } else {
 697                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 698                         return -EACCES;
 699                 rose->source_call   = *source;
 700         }
 701
 702         rose->source_addr   = addr->srose_addr;
 703         rose->device        = dev;
 704         rose->source_ndigis = addr->srose_ndigis;
 705
 706         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 707                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 708                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 709                         rose->source_digis[n] = full_addr->srose_digis[n];
 710         } else {
 711                 if (rose->source_ndigis == 1) {
 712                         rose->source_digis[0] = addr->srose_digi;
 713                 }
 714         }
 715
 716         rose_insert_socket(sk);
 717
 718         sock_reset_flag(sk, SOCK_ZAPPED);
 719         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 720         return 0;
 721 }
 722
 723 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 724 {
 725         struct sock *sk = sock->sk;
 726         struct rose_sock *rose = rose_sk(sk);
 727         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 728         unsigned char cause, diagnostic;
 729         struct net_device *dev;
 730         ax25_uid_assoc *user;
 731         int n, err = 0;
 732
 733         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 734                 return -EINVAL;
 735
 736         if (addr->srose_family != AF_ROSE)
 737                 return -EINVAL;
 738
 739         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 740                 return -EINVAL;
 741
 742         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 743                 return -EINVAL;
 744
 745         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 746         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 747                 return -EINVAL;
 748
 749         lock_sock(sk);
 750
 751         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 752                 /* Connect completed during a ERESTARTSYS event */
 753                 sock->state = SS_CONNECTED;
 754                 goto out_release;
 755         }
 756
 757         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 758                 sock->state = SS_UNCONNECTED;
 759                 err = -ECONNREFUSED;
 760                 goto out_release;
 761         }
 762
 763         if (sk->sk_state == TCP_ESTABLISHED) {
 764                 /* No reconnect on a seqpacket socket */
 765                 err = -EISCONN;
 766                 goto out_release;
 767         }
 768
 769         sk->sk_state   = TCP_CLOSE;
 770         sock->state = SS_UNCONNECTED;
 771
 772         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 773                                          &diagnostic, 0);
 774         if (!rose->neighbour) {
 775                 err = -ENETUNREACH;
 776                 goto out_release;
 777         }
 778
 779         rose->lci = rose_new_lci(rose->neighbour);
 780         if (!rose->lci) {
 781                 err = -ENETUNREACH;
 782                 goto out_release;
 783         }
 784
 785         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 786                 sock_reset_flag(sk, SOCK_ZAPPED);
 787
 788                 if ((dev = rose_dev_first()) == NULL) {
 789                         err = -ENETUNREACH;
 790                         goto out_release;
 791                 }
 792
 793                 user = ax25_findbyuid(current_euid());
 794                 if (!user) {
 795                         err = -EINVAL;
 796                         goto out_release;
 797                 }
 798
 799                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 800                 rose->source_call = user->call;
 801                 rose->device      = dev;
 802                 ax25_uid_put(user);
 803
 804                 rose_insert_socket(sk);         /* Finish the bind */
 805         }
 806 rose_try_next_neigh:
 807         rose->dest_addr   = addr->srose_addr;
 808         rose->dest_call   = addr->srose_call;
 809         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 810         rose->dest_ndigis = addr->srose_ndigis;
 811
 812         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 813                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 814                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 815                         rose->dest_digis[n] = full_addr->srose_digis[n];
 816         } else {
 817                 if (rose->dest_ndigis == 1) {
 818                         rose->dest_digis[0] = addr->srose_digi;
 819                 }
 820         }
 821
 822         /* Move to connecting socket, start sending Connect Requests */
 823         sock->state   = SS_CONNECTING;
 824         sk->sk_state     = TCP_SYN_SENT;
 825
 826         rose->state = ROSE_STATE_1;
 827
 828         rose->neighbour->use++;
 829
 830         rose_write_internal(sk, ROSE_CALL_REQUEST);
 831         rose_start_heartbeat(sk);
 832         rose_start_t1timer(sk);
 833
 834         /* Now the loop */
 835         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 836                 err = -EINPROGRESS;
 837                 goto out_release;
 838         }
 839
 840         /*
 841          * A Connect Ack with Choke or timeout or failed routing will go to
 842          * closed.
 843          */
 844         if (sk->sk_state == TCP_SYN_SENT) {
 845                 DEFINE_WAIT(wait);
 846
 847                 for (;;) {
 848                         prepare_to_wait(sk_sleep(sk), &wait,
 849                                         TASK_INTERRUPTIBLE);
 850                         if (sk->sk_state != TCP_SYN_SENT)
 851                                 break;
 852                         if (!signal_pending(current)) {
 853                                 release_sock(sk);
 854                                 schedule();
 855                                 lock_sock(sk);
 856                                 continue;
 857                         }
 858                         err = -ERESTARTSYS;
 859                         break;
 860                 }
 861                 finish_wait(sk_sleep(sk), &wait);
 862
 863                 if (err)
 864                         goto out_release;
 865         }
 866
 867         if (sk->sk_state != TCP_ESTABLISHED) {
 868         /* Try next neighbour */
 869                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
 870                 if (rose->neighbour)
 871                         goto rose_try_next_neigh;
 872
 873                 /* No more neighbours */
 874                 sock->state = SS_UNCONNECTED;
 875                 err = sock_error(sk);   /* Always set at this point */
 876                 goto out_release;
 877         }
 878
 879         sock->state = SS_CONNECTED;
 880
 881 out_release:
 882         release_sock(sk);
 883
 884         return err;
 885 }
 886
 887 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 888 {
 889         struct sk_buff *skb;
 890         struct sock *newsk;
 891         DEFINE_WAIT(wait);
 892         struct sock *sk;
 893         int err = 0;
 894
 895         if ((sk = sock->sk) == NULL)
 896                 return -EINVAL;
 897
 898         lock_sock(sk);
 899         if (sk->sk_type != SOCK_SEQPACKET) {
 900                 err = -EOPNOTSUPP;
 901                 goto out_release;
 902         }
 903
 904         if (sk->sk_state != TCP_LISTEN) {
 905                 err = -EINVAL;
 906                 goto out_release;
 907         }
 908
 909         /*
 910          *      The write queue this time is holding sockets ready to use
 911          *      hooked into the SABM we saved
 912          */
 913         for (;;) {
 914                 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
 915
 916                 skb = skb_dequeue(&sk->sk_receive_queue);
 917                 if (skb)
 918                         break;
 919
 920                 if (flags & O_NONBLOCK) {
 921                         err = -EWOULDBLOCK;
 922                         break;
 923                 }
 924                 if (!signal_pending(current)) {
 925                         release_sock(sk);
 926                         schedule();
 927                         lock_sock(sk);
 928                         continue;
 929                 }
 930                 err = -ERESTARTSYS;
 931                 break;
 932         }
 933         finish_wait(sk_sleep(sk), &wait);
 934         if (err)
 935                 goto out_release;
 936
 937         newsk = skb->sk;
 938         sock_graft(newsk, newsock);
 939
 940         /* Now attach up the new socket */
 941         skb->sk = NULL;
 942         kfree_skb(skb);
 943         sk->sk_ack_backlog--;
 944
 945 out_release:
 946         release_sock(sk);
 947
 948         return err;
 949 }
 950
 951 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 952         int *uaddr_len, int peer)
 953 {
 954         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 955         struct sock *sk = sock->sk;
 956         struct rose_sock *rose = rose_sk(sk);
 957         int n;
 958
 959         memset(srose, 0, sizeof(*srose));
 960         if (peer != 0) {
 961                 if (sk->sk_state != TCP_ESTABLISHED)
 962                         return -ENOTCONN;
 963                 srose->srose_family = AF_ROSE;
 964                 srose->srose_addr   = rose->dest_addr;
 965                 srose->srose_call   = rose->dest_call;
 966                 srose->srose_ndigis = rose->dest_ndigis;
 967                 for (n = 0; n < rose->dest_ndigis; n++)
 968                         srose->srose_digis[n] = rose->dest_digis[n];
 969         } else {
 970                 srose->srose_family = AF_ROSE;
 971                 srose->srose_addr   = rose->source_addr;
 972                 srose->srose_call   = rose->source_call;
 973                 srose->srose_ndigis = rose->source_ndigis;
 974                 for (n = 0; n < rose->source_ndigis; n++)
 975                         srose->srose_digis[n] = rose->source_digis[n];
 976         }
 977
 978         *uaddr_len = sizeof(struct full_sockaddr_rose);
 979         return 0;
 980 }
 981
 982 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 983 {
 984         struct sock *sk;
 985         struct sock *make;
 986         struct rose_sock *make_rose;
 987         struct rose_facilities_struct facilities;
 988         int n, len;
 989
 990         skb->sk = NULL;         /* Initially we don't know who it's for */
 991
 992         /*
 993          *      skb->data points to the rose frame start
 994          */
 995         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 996
 997         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
 998         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
 999         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
1000                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
1001                 return 0;
1002         }
1003
1004         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1005
1006         /*
1007          * We can't accept the Call Request.
1008          */
1009         if (sk == NULL || sk_acceptq_is_full(sk) ||
1010             (make = rose_make_new(sk)) == NULL) {
1011                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1012                 return 0;
1013         }
1014
1015         skb->sk     = make;
1016         make->sk_state = TCP_ESTABLISHED;
1017         make_rose = rose_sk(make);
1018
1019         make_rose->lci           = lci;
1020         make_rose->dest_addr     = facilities.dest_addr;
1021         make_rose->dest_call     = facilities.dest_call;
1022         make_rose->dest_ndigis   = facilities.dest_ndigis;
1023         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1024                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1025         make_rose->source_addr   = facilities.source_addr;
1026         make_rose->source_call   = facilities.source_call;
1027         make_rose->source_ndigis = facilities.source_ndigis;
1028         for (n = 0 ; n < facilities.source_ndigis ; n++)
1029                 make_rose->source_digis[n]= facilities.source_digis[n];
1030         make_rose->neighbour     = neigh;
1031         make_rose->device        = dev;
1032         make_rose->facilities    = facilities;
1033
1034         make_rose->neighbour->use++;
1035
1036         if (rose_sk(sk)->defer) {
1037                 make_rose->state = ROSE_STATE_5;
1038         } else {
1039                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1040                 make_rose->state = ROSE_STATE_3;
1041                 rose_start_idletimer(make);
1042         }
1043
1044         make_rose->condition = 0x00;
1045         make_rose->vs        = 0;
1046         make_rose->va        = 0;
1047         make_rose->vr        = 0;
1048         make_rose->vl        = 0;
1049         sk->sk_ack_backlog++;
1050
1051         rose_insert_socket(make);
1052
1053         skb_queue_head(&sk->sk_receive_queue, skb);
1054
1055         rose_start_heartbeat(make);
1056
1057         if (!sock_flag(sk, SOCK_DEAD))
1058                 sk->sk_data_ready(sk, skb->len);
1059
1060         return 1;
1061 }
1062
1063 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1064                         struct msghdr *msg, size_t len)
1065 {
1066         struct sock *sk = sock->sk;
1067         struct rose_sock *rose = rose_sk(sk);
1068         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1069         int err;
1070         struct full_sockaddr_rose srose;
1071         struct sk_buff *skb;
1072         unsigned char *asmptr;
1073         int n, size, qbit = 0;
1074
1075         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1076                 return -EINVAL;
1077
1078         if (sock_flag(sk, SOCK_ZAPPED))
1079                 return -EADDRNOTAVAIL;
1080
1081         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1082                 send_sig(SIGPIPE, current, 0);
1083                 return -EPIPE;
1084         }
1085
1086         if (rose->neighbour == NULL || rose->device == NULL)
1087                 return -ENETUNREACH;
1088
1089         if (usrose != NULL) {
1090                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1091                         return -EINVAL;
1092                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1093                 memcpy(&srose, usrose, msg->msg_namelen);
1094                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1095                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1096                         return -EISCONN;
1097                 if (srose.srose_ndigis != rose->dest_ndigis)
1098                         return -EISCONN;
1099                 if (srose.srose_ndigis == rose->dest_ndigis) {
1100                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1101                                 if (ax25cmp(&rose->dest_digis[n],
1102                                             &srose.srose_digis[n]))
1103                                         return -EISCONN;
1104                 }
1105                 if (srose.srose_family != AF_ROSE)
1106                         return -EINVAL;
1107         } else {
1108                 if (sk->sk_state != TCP_ESTABLISHED)
1109                         return -ENOTCONN;
1110
1111                 srose.srose_family = AF_ROSE;
1112                 srose.srose_addr   = rose->dest_addr;
1113                 srose.srose_call   = rose->dest_call;
1114                 srose.srose_ndigis = rose->dest_ndigis;
1115                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1116                         srose.srose_digis[n] = rose->dest_digis[n];
1117         }
1118
1119         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1120
1121         /* Build a packet */
1122         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1123         /* Sanity check the packet size */
1124         if (len > 65535)
1125                 return -EMSGSIZE;
1126
1127         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1128
1129         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1130                 return err;
1131
1132         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1133
1134         /*
1135          *      Put the data on the end
1136          */
1137         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1138
1139         skb_reset_transport_header(skb);
1140         skb_put(skb, len);
1141
1142         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1143         if (err) {
1144                 kfree_skb(skb);
1145                 return err;
1146         }
1147
1148         /*
1149          *      If the Q BIT Include socket option is in force, the first
1150          *      byte of the user data is the logical value of the Q Bit.
1151          */
1152         if (rose->qbitincl) {
1153                 qbit = skb->data[0];
1154                 skb_pull(skb, 1);
1155         }
1156
1157         /*
1158          *      Push down the ROSE header
1159          */
1160         asmptr = skb_push(skb, ROSE_MIN_LEN);
1161
1162         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1163
1164         /* Build a ROSE Network header */
1165         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1166         asmptr[1] = (rose->lci >> 0) & 0xFF;
1167         asmptr[2] = ROSE_DATA;
1168
1169         if (qbit)
1170                 asmptr[0] |= ROSE_Q_BIT;
1171
1172         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1173
1174         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1175
1176         if (sk->sk_state != TCP_ESTABLISHED) {
1177                 kfree_skb(skb);
1178                 return -ENOTCONN;
1179         }
1180
1181 #ifdef M_BIT
1182 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1183         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1184                 unsigned char header[ROSE_MIN_LEN];
1185                 struct sk_buff *skbn;
1186                 int frontlen;
1187                 int lg;
1188
1189                 /* Save a copy of the Header */
1190                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1191                 skb_pull(skb, ROSE_MIN_LEN);
1192
1193                 frontlen = skb_headroom(skb);
1194
1195                 while (skb->len > 0) {
1196                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1197                                 kfree_skb(skb);
1198                                 return err;
1199                         }
1200
1201                         skbn->sk   = sk;
1202                         skbn->free = 1;
1203                         skbn->arp  = 1;
1204
1205                         skb_reserve(skbn, frontlen);
1206
1207                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1208
1209                         /* Copy the user data */
1210                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1211                         skb_pull(skb, lg);
1212
1213                         /* Duplicate the Header */
1214                         skb_push(skbn, ROSE_MIN_LEN);
1215                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1216
1217                         if (skb->len > 0)
1218                                 skbn->data[2] |= M_BIT;
1219
1220                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1221                 }
1222
1223                 skb->free = 1;
1224                 kfree_skb(skb);
1225         } else {
1226                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1227         }
1228 #else
1229         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1230 #endif
1231
1232         rose_kick(sk);
1233
1234         return len;
1235 }
1236
1237
1238 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1239                         struct msghdr *msg, size_t size, int flags)
1240 {
1241         struct sock *sk = sock->sk;
1242         struct rose_sock *rose = rose_sk(sk);
1243         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1244         size_t copied;
1245         unsigned char *asmptr;
1246         struct sk_buff *skb;
1247         int n, er, qbit;
1248
1249         /*
1250          * This works for seqpacket too. The receiver has ordered the queue for
1251          * us! We do one quick check first though
1252          */
1253         if (sk->sk_state != TCP_ESTABLISHED)
1254                 return -ENOTCONN;
1255
1256         /* Now we can treat all alike */
1257         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1258                 return er;
1259
1260         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1261
1262         skb_pull(skb, ROSE_MIN_LEN);
1263
1264         if (rose->qbitincl) {
1265                 asmptr  = skb_push(skb, 1);
1266                 *asmptr = qbit;
1267         }
1268
1269         skb_reset_transport_header(skb);
1270         copied     = skb->len;
1271
1272         if (copied > size) {
1273                 copied = size;
1274                 msg->msg_flags |= MSG_TRUNC;
1275         }
1276
1277         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1278
1279         if (srose != NULL) {
1280                 srose->srose_family = AF_ROSE;
1281                 srose->srose_addr   = rose->dest_addr;
1282                 srose->srose_call   = rose->dest_call;
1283                 srose->srose_ndigis = rose->dest_ndigis;
1284                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1285                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1286                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1287                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1288                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1289                 } else {
1290                         if (rose->dest_ndigis >= 1) {
1291                                 srose->srose_ndigis = 1;
1292                                 srose->srose_digi = rose->dest_digis[0];
1293                         }
1294                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1295                 }
1296         }
1297
1298         skb_free_datagram(sk, skb);
1299
1300         return copied;
1301 }
1302
1303
1304 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1305 {
1306         struct sock *sk = sock->sk;
1307         struct rose_sock *rose = rose_sk(sk);
1308         void __user *argp = (void __user *)arg;
1309
1310         switch (cmd) {
1311         case TIOCOUTQ: {
1312                 long amount;
1313
1314                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1315                 if (amount < 0)
1316                         amount = 0;
1317                 return put_user(amount, (unsigned int __user *) argp);
1318         }
1319
1320         case TIOCINQ: {
1321                 struct sk_buff *skb;
1322                 long amount = 0L;
1323                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1324                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1325                         amount = skb->len;
1326                 return put_user(amount, (unsigned int __user *) argp);
1327         }
1328
1329         case SIOCGSTAMP:
1330                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1331
1332         case SIOCGSTAMPNS:
1333                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1334
1335         case SIOCGIFADDR:
1336         case SIOCSIFADDR:
1337         case SIOCGIFDSTADDR:
1338         case SIOCSIFDSTADDR:
1339         case SIOCGIFBRDADDR:
1340         case SIOCSIFBRDADDR:
1341         case SIOCGIFNETMASK:
1342         case SIOCSIFNETMASK:
1343         case SIOCGIFMETRIC:
1344         case SIOCSIFMETRIC:
1345                 return -EINVAL;
1346
1347         case SIOCADDRT:
1348         case SIOCDELRT:
1349         case SIOCRSCLRRT:
1350                 if (!capable(CAP_NET_ADMIN))
1351                         return -EPERM;
1352                 return rose_rt_ioctl(cmd, argp);
1353
1354         case SIOCRSGCAUSE: {
1355                 struct rose_cause_struct rose_cause;
1356                 rose_cause.cause      = rose->cause;
1357                 rose_cause.diagnostic = rose->diagnostic;
1358                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1359         }
1360
1361         case SIOCRSSCAUSE: {
1362                 struct rose_cause_struct rose_cause;
1363                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1364                         return -EFAULT;
1365                 rose->cause      = rose_cause.cause;
1366                 rose->diagnostic = rose_cause.diagnostic;
1367                 return 0;
1368         }
1369
1370         case SIOCRSSL2CALL:
1371                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1372                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1373                         ax25_listen_release(&rose_callsign, NULL);
1374                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1375                         return -EFAULT;
1376                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1377                         return ax25_listen_register(&rose_callsign, NULL);
1378
1379                 return 0;
1380
1381         case SIOCRSGL2CALL:
1382                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1383
1384         case SIOCRSACCEPT:
1385                 if (rose->state == ROSE_STATE_5) {
1386                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1387                         rose_start_idletimer(sk);
1388                         rose->condition = 0x00;
1389                         rose->vs        = 0;
1390                         rose->va        = 0;
1391                         rose->vr        = 0;
1392                         rose->vl        = 0;
1393                         rose->state     = ROSE_STATE_3;
1394                 }
1395                 return 0;
1396
1397         default:
1398                 return -ENOIOCTLCMD;
1399         }
1400
1401         return 0;
1402 }
1403
1404 #ifdef CONFIG_PROC_FS
1405 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1406         __acquires(rose_list_lock)
1407 {
1408         spin_lock_bh(&rose_list_lock);
1409         return seq_hlist_start_head(&rose_list, *pos);
1410 }
1411
1412 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1413 {
1414         return seq_hlist_next(v, &rose_list, pos);
1415 }
1416
1417 static void rose_info_stop(struct seq_file *seq, void *v)
1418         __releases(rose_list_lock)
1419 {
1420         spin_unlock_bh(&rose_list_lock);
1421 }
1422
1423 static int rose_info_show(struct seq_file *seq, void *v)
1424 {
1425         char buf[11], rsbuf[11];
1426
1427         if (v == SEQ_START_TOKEN)
1428                 seq_puts(seq,
1429                          "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");
1430
1431         else {
1432                 struct sock *s = sk_entry(v);
1433                 struct rose_sock *rose = rose_sk(s);
1434                 const char *devname, *callsign;
1435                 const struct net_device *dev = rose->device;
1436
1437                 if (!dev)
1438                         devname = "???";
1439                 else
1440                         devname = dev->name;
1441
1442                 seq_printf(seq, "%-10s %-9s ",
1443                            rose2asc(rsbuf, &rose->dest_addr),
1444                            ax2asc(buf, &rose->dest_call));
1445
1446                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1447                         callsign = "??????-?";
1448                 else
1449                         callsign = ax2asc(buf, &rose->source_call);
1450
1451                 seq_printf(seq,
1452                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1453                         rose2asc(rsbuf, &rose->source_addr),
1454                         callsign,
1455                         devname,
1456                         rose->lci & 0x0FFF,
1457                         (rose->neighbour) ? rose->neighbour->number : 0,
1458                         rose->state,
1459                         rose->vs,
1460                         rose->vr,
1461                         rose->va,
1462                         ax25_display_timer(&rose->timer) / HZ,
1463                         rose->t1 / HZ,
1464                         rose->t2 / HZ,
1465                         rose->t3 / HZ,
1466                         rose->hb / HZ,
1467                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1468                         rose->idle / (60 * HZ),
1469                         sk_wmem_alloc_get(s),
1470                         sk_rmem_alloc_get(s),
1471                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1472         }
1473
1474         return 0;
1475 }
1476
1477 static const struct seq_operations rose_info_seqops = {
1478         .start = rose_info_start,
1479         .next = rose_info_next,
1480         .stop = rose_info_stop,
1481         .show = rose_info_show,
1482 };
1483
1484 static int rose_info_open(struct inode *inode, struct file *file)
1485 {
1486         return seq_open(file, &rose_info_seqops);
1487 }
1488
1489 static const struct file_operations rose_info_fops = {
1490         .owner = THIS_MODULE,
1491         .open = rose_info_open,
1492         .read = seq_read,
1493         .llseek = seq_lseek,
1494         .release = seq_release,
1495 };
1496 #endif  /* CONFIG_PROC_FS */
1497
1498 static const struct net_proto_family rose_family_ops = {
1499         .family         =       PF_ROSE,
1500         .create         =       rose_create,
1501         .owner          =       THIS_MODULE,
1502 };
1503
1504 static const struct proto_ops rose_proto_ops = {
1505         .family         =       PF_ROSE,
1506         .owner          =       THIS_MODULE,
1507         .release        =       rose_release,
1508         .bind           =       rose_bind,
1509         .connect        =       rose_connect,
1510         .socketpair     =       sock_no_socketpair,
1511         .accept         =       rose_accept,
1512         .getname        =       rose_getname,
1513         .poll           =       datagram_poll,
1514         .ioctl          =       rose_ioctl,
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 to 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 = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1558         if (dev_rose == NULL) {
1559                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1560                 rc = -ENOMEM;
1561                 goto out_proto_unregister;
1562         }
1563
1564         for (i = 0; i < rose_ndevs; i++) {
1565                 struct net_device *dev;
1566                 char name[IFNAMSIZ];
1567
1568                 sprintf(name, "rose%d", i);
1569                 dev = alloc_netdev(0, name, rose_setup);
1570                 if (!dev) {
1571                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1572                         rc = -ENOMEM;
1573                         goto fail;
1574                 }
1575                 rc = register_netdev(dev);
1576                 if (rc) {
1577                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1578                         free_netdev(dev);
1579                         goto fail;
1580                 }
1581                 rose_set_lockdep_key(dev);
1582                 dev_rose[i] = dev;
1583         }
1584
1585         sock_register(&rose_family_ops);
1586         register_netdevice_notifier(&rose_dev_notifier);
1587
1588         ax25_register_pid(&rose_pid);
1589         ax25_linkfail_register(&rose_linkfail_notifier);
1590
1591 #ifdef CONFIG_SYSCTL
1592         rose_register_sysctl();
1593 #endif
1594         rose_loopback_init();
1595
1596         rose_add_loopback_neigh();
1597
1598         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1599         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1600         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1601         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1602 out:
1603         return rc;
1604 fail:
1605         while (--i >= 0) {
1606                 unregister_netdev(dev_rose[i]);
1607                 free_netdev(dev_rose[i]);
1608         }
1609         kfree(dev_rose);
1610 out_proto_unregister:
1611         proto_unregister(&rose_proto);
1612         goto out;
1613 }
1614 module_init(rose_proto_init);
1615
1616 module_param(rose_ndevs, int, 0);
1617 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1618
1619 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1620 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1621 MODULE_LICENSE("GPL");
1622 MODULE_ALIAS_NETPROTO(PF_ROSE);
1623
1624 static void __exit rose_exit(void)
1625 {
1626         int i;
1627
1628         proc_net_remove(&init_net, "rose");
1629         proc_net_remove(&init_net, "rose_neigh");
1630         proc_net_remove(&init_net, "rose_nodes");
1631         proc_net_remove(&init_net, "rose_routes");
1632         rose_loopback_clear();
1633
1634         rose_rt_free();
1635
1636         ax25_protocol_release(AX25_P_ROSE);
1637         ax25_linkfail_release(&rose_linkfail_notifier);
1638
1639         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1640                 ax25_listen_release(&rose_callsign, NULL);
1641
1642 #ifdef CONFIG_SYSCTL
1643         rose_unregister_sysctl();
1644 #endif
1645         unregister_netdevice_notifier(&rose_dev_notifier);
1646
1647         sock_unregister(PF_ROSE);
1648
1649         for (i = 0; i < rose_ndevs; i++) {
1650                 struct net_device *dev = dev_rose[i];
1651
1652                 if (dev) {
1653                         unregister_netdev(dev);
1654                         free_netdev(dev);
1655                 }
1656         }
1657
1658         kfree(dev_rose);
1659         proto_unregister(&rose_proto);
1660 }
1661
1662 module_exit(rose_exit);