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/kernel.h>
  22 #include <linux/sched.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/timer.h>
  25 #include <linux/string.h>
  26 #include <linux/sockios.h>
  27 #include <linux/net.h>
  28 #include <linux/stat.h>
  29 #include <net/net_namespace.h>
  30 #include <net/ax25.h>
  31 #include <linux/inet.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/if_arp.h>
  34 #include <linux/skbuff.h>
  35 #include <net/sock.h>
  36 #include <asm/system.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 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
  78 static void rose_set_lockdep_one(struct netdev_queue *txq)
  79 {
  80         lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
  81 }
  82
  83 static void rose_set_lockdep_key(struct net_device *dev)
  84 {
  85         rose_set_lockdep_one(&dev->tx_queue);
  86 }
  87
  88 /*
  89  *      Convert a ROSE address into text.
  90  */
  91 const char *rose2asc(const rose_address *addr)
  92 {
  93         static char buffer[11];
  94
  95         if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
  96             addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
  97             addr->rose_addr[4] == 0x00) {
  98                 strcpy(buffer, "*");
  99         } else {
 100                 sprintf(buffer, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
 101                                                 addr->rose_addr[1] & 0xFF,
 102                                                 addr->rose_addr[2] & 0xFF,
 103                                                 addr->rose_addr[3] & 0xFF,
 104                                                 addr->rose_addr[4] & 0xFF);
 105         }
 106
 107         return buffer;
 108 }
 109
 110 /*
 111  *      Compare two ROSE addresses, 0 == equal.
 112  */
 113 int rosecmp(rose_address *addr1, rose_address *addr2)
 114 {
 115         int i;
 116
 117         for (i = 0; i < 5; i++)
 118                 if (addr1->rose_addr[i] != addr2->rose_addr[i])
 119                         return 1;
 120
 121         return 0;
 122 }
 123
 124 /*
 125  *      Compare two ROSE addresses for only mask digits, 0 == equal.
 126  */
 127 int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
 128 {
 129         unsigned int i, j;
 130
 131         if (mask > 10)
 132                 return 1;
 133
 134         for (i = 0; i < mask; i++) {
 135                 j = i / 2;
 136
 137                 if ((i % 2) != 0) {
 138                         if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
 139                                 return 1;
 140                 } else {
 141                         if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
 142                                 return 1;
 143                 }
 144         }
 145
 146         return 0;
 147 }
 148
 149 /*
 150  *      Socket removal during an interrupt is now safe.
 151  */
 152 static void rose_remove_socket(struct sock *sk)
 153 {
 154         spin_lock_bh(&rose_list_lock);
 155         sk_del_node_init(sk);
 156         spin_unlock_bh(&rose_list_lock);
 157 }
 158
 159 /*
 160  *      Kill all bound sockets on a broken link layer connection to a
 161  *      particular neighbour.
 162  */
 163 void rose_kill_by_neigh(struct rose_neigh *neigh)
 164 {
 165         struct sock *s;
 166         struct hlist_node *node;
 167
 168         spin_lock_bh(&rose_list_lock);
 169         sk_for_each(s, node, &rose_list) {
 170                 struct rose_sock *rose = rose_sk(s);
 171
 172                 if (rose->neighbour == neigh) {
 173                         rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
 174                         rose->neighbour->use--;
 175                         rose->neighbour = NULL;
 176                 }
 177         }
 178         spin_unlock_bh(&rose_list_lock);
 179 }
 180
 181 /*
 182  *      Kill all bound sockets on a dropped device.
 183  */
 184 static void rose_kill_by_device(struct net_device *dev)
 185 {
 186         struct sock *s;
 187         struct hlist_node *node;
 188
 189         spin_lock_bh(&rose_list_lock);
 190         sk_for_each(s, node, &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, unsigned long event,
 206         void *ptr)
 207 {
 208         struct net_device *dev = (struct net_device *)ptr;
 209
 210         if (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         struct hlist_node *node;
 248
 249         spin_lock_bh(&rose_list_lock);
 250         sk_for_each(s, node, &rose_list) {
 251                 struct rose_sock *rose = rose_sk(s);
 252
 253                 if (!rosecmp(&rose->source_addr, addr) &&
 254                     !ax25cmp(&rose->source_call, call) &&
 255                     !rose->source_ndigis && s->sk_state == TCP_LISTEN)
 256                         goto found;
 257         }
 258
 259         sk_for_each(s, node, &rose_list) {
 260                 struct rose_sock *rose = rose_sk(s);
 261
 262                 if (!rosecmp(&rose->source_addr, addr) &&
 263                     !ax25cmp(&rose->source_call, &null_ax25_address) &&
 264                     s->sk_state == TCP_LISTEN)
 265                         goto found;
 266         }
 267         s = NULL;
 268 found:
 269         spin_unlock_bh(&rose_list_lock);
 270         return s;
 271 }
 272
 273 /*
 274  *      Find a connected ROSE socket given my LCI and device.
 275  */
 276 struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
 277 {
 278         struct sock *s;
 279         struct hlist_node *node;
 280
 281         spin_lock_bh(&rose_list_lock);
 282         sk_for_each(s, node, &rose_list) {
 283                 struct rose_sock *rose = rose_sk(s);
 284
 285                 if (rose->lci == lci && rose->neighbour == neigh)
 286                         goto found;
 287         }
 288         s = NULL;
 289 found:
 290         spin_unlock_bh(&rose_list_lock);
 291         return s;
 292 }
 293
 294 /*
 295  *      Find a unique LCI for a given device.
 296  */
 297 unsigned int rose_new_lci(struct rose_neigh *neigh)
 298 {
 299         int lci;
 300
 301         if (neigh->dce_mode) {
 302                 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
 303                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 304                                 return lci;
 305         } else {
 306                 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
 307                         if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
 308                                 return lci;
 309         }
 310
 311         return 0;
 312 }
 313
 314 /*
 315  *      Deferred destroy.
 316  */
 317 void rose_destroy_socket(struct sock *);
 318
 319 /*
 320  *      Handler for deferred kills.
 321  */
 322 static void rose_destroy_timer(unsigned long data)
 323 {
 324         rose_destroy_socket((struct sock *)data);
 325 }
 326
 327 /*
 328  *      This is called from user mode and the timers. Thus it protects itself
 329  *      against interrupt users but doesn't worry about being called during
 330  *      work.  Once it is removed from the queue no interrupt or bottom half
 331  *      will touch it and we are (fairly 8-) ) safe.
 332  */
 333 void rose_destroy_socket(struct sock *sk)
 334 {
 335         struct sk_buff *skb;
 336
 337         rose_remove_socket(sk);
 338         rose_stop_heartbeat(sk);
 339         rose_stop_idletimer(sk);
 340         rose_stop_timer(sk);
 341
 342         rose_clear_queues(sk);          /* Flush the queues */
 343
 344         while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
 345                 if (skb->sk != sk) {    /* A pending connection */
 346                         /* Queue the unaccepted socket for death */
 347                         sock_set_flag(skb->sk, SOCK_DEAD);
 348                         rose_start_heartbeat(skb->sk);
 349                         rose_sk(skb->sk)->state = ROSE_STATE_0;
 350                 }
 351
 352                 kfree_skb(skb);
 353         }
 354
 355         if (atomic_read(&sk->sk_wmem_alloc) ||
 356             atomic_read(&sk->sk_rmem_alloc)) {
 357                 /* Defer: outstanding buffers */
 358                 setup_timer(&sk->sk_timer, rose_destroy_timer,
 359                                 (unsigned long)sk);
 360                 sk->sk_timer.expires  = jiffies + 10 * HZ;
 361                 add_timer(&sk->sk_timer);
 362         } else
 363                 sock_put(sk);
 364 }
 365
 366 /*
 367  *      Handling for system calls applied via the various interfaces to a
 368  *      ROSE socket object.
 369  */
 370
 371 static int rose_setsockopt(struct socket *sock, int level, int optname,
 372         char __user *optval, int optlen)
 373 {
 374         struct sock *sk = sock->sk;
 375         struct rose_sock *rose = rose_sk(sk);
 376         int opt;
 377
 378         if (level != SOL_ROSE)
 379                 return -ENOPROTOOPT;
 380
 381         if (optlen < sizeof(int))
 382                 return -EINVAL;
 383
 384         if (get_user(opt, (int __user *)optval))
 385                 return -EFAULT;
 386
 387         switch (optname) {
 388         case ROSE_DEFER:
 389                 rose->defer = opt ? 1 : 0;
 390                 return 0;
 391
 392         case ROSE_T1:
 393                 if (opt < 1)
 394                         return -EINVAL;
 395                 rose->t1 = opt * HZ;
 396                 return 0;
 397
 398         case ROSE_T2:
 399                 if (opt < 1)
 400                         return -EINVAL;
 401                 rose->t2 = opt * HZ;
 402                 return 0;
 403
 404         case ROSE_T3:
 405                 if (opt < 1)
 406                         return -EINVAL;
 407                 rose->t3 = opt * HZ;
 408                 return 0;
 409
 410         case ROSE_HOLDBACK:
 411                 if (opt < 1)
 412                         return -EINVAL;
 413                 rose->hb = opt * HZ;
 414                 return 0;
 415
 416         case ROSE_IDLE:
 417                 if (opt < 0)
 418                         return -EINVAL;
 419                 rose->idle = opt * 60 * HZ;
 420                 return 0;
 421
 422         case ROSE_QBITINCL:
 423                 rose->qbitincl = opt ? 1 : 0;
 424                 return 0;
 425
 426         default:
 427                 return -ENOPROTOOPT;
 428         }
 429 }
 430
 431 static int rose_getsockopt(struct socket *sock, int level, int optname,
 432         char __user *optval, int __user *optlen)
 433 {
 434         struct sock *sk = sock->sk;
 435         struct rose_sock *rose = rose_sk(sk);
 436         int val = 0;
 437         int len;
 438
 439         if (level != SOL_ROSE)
 440                 return -ENOPROTOOPT;
 441
 442         if (get_user(len, optlen))
 443                 return -EFAULT;
 444
 445         if (len < 0)
 446                 return -EINVAL;
 447
 448         switch (optname) {
 449         case ROSE_DEFER:
 450                 val = rose->defer;
 451                 break;
 452
 453         case ROSE_T1:
 454                 val = rose->t1 / HZ;
 455                 break;
 456
 457         case ROSE_T2:
 458                 val = rose->t2 / HZ;
 459                 break;
 460
 461         case ROSE_T3:
 462                 val = rose->t3 / HZ;
 463                 break;
 464
 465         case ROSE_HOLDBACK:
 466                 val = rose->hb / HZ;
 467                 break;
 468
 469         case ROSE_IDLE:
 470                 val = rose->idle / (60 * HZ);
 471                 break;
 472
 473         case ROSE_QBITINCL:
 474                 val = rose->qbitincl;
 475                 break;
 476
 477         default:
 478                 return -ENOPROTOOPT;
 479         }
 480
 481         len = min_t(unsigned int, len, sizeof(int));
 482
 483         if (put_user(len, optlen))
 484                 return -EFAULT;
 485
 486         return copy_to_user(optval, &val, len) ? -EFAULT : 0;
 487 }
 488
 489 static int rose_listen(struct socket *sock, int backlog)
 490 {
 491         struct sock *sk = sock->sk;
 492
 493         if (sk->sk_state != TCP_LISTEN) {
 494                 struct rose_sock *rose = rose_sk(sk);
 495
 496                 rose->dest_ndigis = 0;
 497                 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
 498                 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
 499                 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 500                 sk->sk_max_ack_backlog = backlog;
 501                 sk->sk_state           = TCP_LISTEN;
 502                 return 0;
 503         }
 504
 505         return -EOPNOTSUPP;
 506 }
 507
 508 static struct proto rose_proto = {
 509         .name     = "ROSE",
 510         .owner    = THIS_MODULE,
 511         .obj_size = sizeof(struct rose_sock),
 512 };
 513
 514 static int rose_create(struct net *net, struct socket *sock, int protocol)
 515 {
 516         struct sock *sk;
 517         struct rose_sock *rose;
 518
 519         if (net != &init_net)
 520                 return -EAFNOSUPPORT;
 521
 522         if (sock->type != SOCK_SEQPACKET || protocol != 0)
 523                 return -ESOCKTNOSUPPORT;
 524
 525         sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto);
 526         if (sk == NULL)
 527                 return -ENOMEM;
 528
 529         rose = rose_sk(sk);
 530
 531         sock_init_data(sock, sk);
 532
 533         skb_queue_head_init(&rose->ack_queue);
 534 #ifdef M_BIT
 535         skb_queue_head_init(&rose->frag_queue);
 536         rose->fraglen    = 0;
 537 #endif
 538
 539         sock->ops    = &rose_proto_ops;
 540         sk->sk_protocol = protocol;
 541
 542         init_timer(&rose->timer);
 543         init_timer(&rose->idletimer);
 544
 545         rose->t1   = msecs_to_jiffies(sysctl_rose_call_request_timeout);
 546         rose->t2   = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
 547         rose->t3   = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
 548         rose->hb   = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
 549         rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
 550
 551         rose->state = ROSE_STATE_0;
 552
 553         return 0;
 554 }
 555
 556 static struct sock *rose_make_new(struct sock *osk)
 557 {
 558         struct sock *sk;
 559         struct rose_sock *rose, *orose;
 560
 561         if (osk->sk_type != SOCK_SEQPACKET)
 562                 return NULL;
 563
 564         sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto);
 565         if (sk == NULL)
 566                 return NULL;
 567
 568         rose = rose_sk(sk);
 569
 570         sock_init_data(NULL, sk);
 571
 572         skb_queue_head_init(&rose->ack_queue);
 573 #ifdef M_BIT
 574         skb_queue_head_init(&rose->frag_queue);
 575         rose->fraglen  = 0;
 576 #endif
 577
 578         sk->sk_type     = osk->sk_type;
 579         sk->sk_priority = osk->sk_priority;
 580         sk->sk_protocol = osk->sk_protocol;
 581         sk->sk_rcvbuf   = osk->sk_rcvbuf;
 582         sk->sk_sndbuf   = osk->sk_sndbuf;
 583         sk->sk_state    = TCP_ESTABLISHED;
 584         sock_copy_flags(sk, osk);
 585
 586         init_timer(&rose->timer);
 587         init_timer(&rose->idletimer);
 588
 589         orose           = rose_sk(osk);
 590         rose->t1        = orose->t1;
 591         rose->t2        = orose->t2;
 592         rose->t3        = orose->t3;
 593         rose->hb        = orose->hb;
 594         rose->idle      = orose->idle;
 595         rose->defer     = orose->defer;
 596         rose->device    = orose->device;
 597         rose->qbitincl  = orose->qbitincl;
 598
 599         return sk;
 600 }
 601
 602 static int rose_release(struct socket *sock)
 603 {
 604         struct sock *sk = sock->sk;
 605         struct rose_sock *rose;
 606
 607         if (sk == NULL) return 0;
 608
 609         sock_hold(sk);
 610         sock_orphan(sk);
 611         lock_sock(sk);
 612         rose = rose_sk(sk);
 613
 614         switch (rose->state) {
 615         case ROSE_STATE_0:
 616                 release_sock(sk);
 617                 rose_disconnect(sk, 0, -1, -1);
 618                 lock_sock(sk);
 619                 rose_destroy_socket(sk);
 620                 break;
 621
 622         case ROSE_STATE_2:
 623                 rose->neighbour->use--;
 624                 release_sock(sk);
 625                 rose_disconnect(sk, 0, -1, -1);
 626                 lock_sock(sk);
 627                 rose_destroy_socket(sk);
 628                 break;
 629
 630         case ROSE_STATE_1:
 631         case ROSE_STATE_3:
 632         case ROSE_STATE_4:
 633         case ROSE_STATE_5:
 634                 rose_clear_queues(sk);
 635                 rose_stop_idletimer(sk);
 636                 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
 637                 rose_start_t3timer(sk);
 638                 rose->state  = ROSE_STATE_2;
 639                 sk->sk_state    = TCP_CLOSE;
 640                 sk->sk_shutdown |= SEND_SHUTDOWN;
 641                 sk->sk_state_change(sk);
 642                 sock_set_flag(sk, SOCK_DEAD);
 643                 sock_set_flag(sk, SOCK_DESTROY);
 644                 break;
 645
 646         default:
 647                 break;
 648         }
 649
 650         sock->sk = NULL;
 651         release_sock(sk);
 652         sock_put(sk);
 653
 654         return 0;
 655 }
 656
 657 static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 658 {
 659         struct sock *sk = sock->sk;
 660         struct rose_sock *rose = rose_sk(sk);
 661         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 662         struct net_device *dev;
 663         ax25_address *source;
 664         ax25_uid_assoc *user;
 665         int n;
 666
 667         if (!sock_flag(sk, SOCK_ZAPPED))
 668                 return -EINVAL;
 669
 670         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 671                 return -EINVAL;
 672
 673         if (addr->srose_family != AF_ROSE)
 674                 return -EINVAL;
 675
 676         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 677                 return -EINVAL;
 678
 679         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 680                 return -EINVAL;
 681
 682         if ((dev = rose_dev_get(&addr->srose_addr)) == NULL) {
 683                 SOCK_DEBUG(sk, "ROSE: bind failed: invalid address\n");
 684                 return -EADDRNOTAVAIL;
 685         }
 686
 687         source = &addr->srose_call;
 688
 689         user = ax25_findbyuid(current->euid);
 690         if (user) {
 691                 rose->source_call = user->call;
 692                 ax25_uid_put(user);
 693         } else {
 694                 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
 695                         return -EACCES;
 696                 rose->source_call   = *source;
 697         }
 698
 699         rose->source_addr   = addr->srose_addr;
 700         rose->device        = dev;
 701         rose->source_ndigis = addr->srose_ndigis;
 702
 703         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 704                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 705                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 706                         rose->source_digis[n] = full_addr->srose_digis[n];
 707         } else {
 708                 if (rose->source_ndigis == 1) {
 709                         rose->source_digis[0] = addr->srose_digi;
 710                 }
 711         }
 712
 713         rose_insert_socket(sk);
 714
 715         sock_reset_flag(sk, SOCK_ZAPPED);
 716         SOCK_DEBUG(sk, "ROSE: socket is bound\n");
 717         return 0;
 718 }
 719
 720 static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
 721 {
 722         struct sock *sk = sock->sk;
 723         struct rose_sock *rose = rose_sk(sk);
 724         struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
 725         unsigned char cause, diagnostic;
 726         struct net_device *dev;
 727         ax25_uid_assoc *user;
 728         int n, err = 0;
 729
 730         if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
 731                 return -EINVAL;
 732
 733         if (addr->srose_family != AF_ROSE)
 734                 return -EINVAL;
 735
 736         if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
 737                 return -EINVAL;
 738
 739         if (addr->srose_ndigis > ROSE_MAX_DIGIS)
 740                 return -EINVAL;
 741
 742         /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
 743         if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
 744                 return -EINVAL;
 745
 746         lock_sock(sk);
 747
 748         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 749                 /* Connect completed during a ERESTARTSYS event */
 750                 sock->state = SS_CONNECTED;
 751                 goto out_release;
 752         }
 753
 754         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 755                 sock->state = SS_UNCONNECTED;
 756                 err = -ECONNREFUSED;
 757                 goto out_release;
 758         }
 759
 760         if (sk->sk_state == TCP_ESTABLISHED) {
 761                 /* No reconnect on a seqpacket socket */
 762                 err = -EISCONN;
 763                 goto out_release;
 764         }
 765
 766         sk->sk_state   = TCP_CLOSE;
 767         sock->state = SS_UNCONNECTED;
 768
 769         rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
 770                                          &diagnostic, 0);
 771         if (!rose->neighbour) {
 772                 err = -ENETUNREACH;
 773                 goto out_release;
 774         }
 775
 776         rose->lci = rose_new_lci(rose->neighbour);
 777         if (!rose->lci) {
 778                 err = -ENETUNREACH;
 779                 goto out_release;
 780         }
 781
 782         if (sock_flag(sk, SOCK_ZAPPED)) {       /* Must bind first - autobinding in this may or may not work */
 783                 sock_reset_flag(sk, SOCK_ZAPPED);
 784
 785                 if ((dev = rose_dev_first()) == NULL) {
 786                         err = -ENETUNREACH;
 787                         goto out_release;
 788                 }
 789
 790                 user = ax25_findbyuid(current->euid);
 791                 if (!user) {
 792                         err = -EINVAL;
 793                         goto out_release;
 794                 }
 795
 796                 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
 797                 rose->source_call = user->call;
 798                 rose->device      = dev;
 799                 ax25_uid_put(user);
 800
 801                 rose_insert_socket(sk);         /* Finish the bind */
 802         }
 803 rose_try_next_neigh:
 804         rose->dest_addr   = addr->srose_addr;
 805         rose->dest_call   = addr->srose_call;
 806         rose->rand        = ((long)rose & 0xFFFF) + rose->lci;
 807         rose->dest_ndigis = addr->srose_ndigis;
 808
 809         if (addr_len == sizeof(struct full_sockaddr_rose)) {
 810                 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
 811                 for (n = 0 ; n < addr->srose_ndigis ; n++)
 812                         rose->dest_digis[n] = full_addr->srose_digis[n];
 813         } else {
 814                 if (rose->dest_ndigis == 1) {
 815                         rose->dest_digis[0] = addr->srose_digi;
 816                 }
 817         }
 818
 819         /* Move to connecting socket, start sending Connect Requests */
 820         sock->state   = SS_CONNECTING;
 821         sk->sk_state     = TCP_SYN_SENT;
 822
 823         rose->state = ROSE_STATE_1;
 824
 825         rose->neighbour->use++;
 826
 827         rose_write_internal(sk, ROSE_CALL_REQUEST);
 828         rose_start_heartbeat(sk);
 829         rose_start_t1timer(sk);
 830
 831         /* Now the loop */
 832         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
 833                 err = -EINPROGRESS;
 834                 goto out_release;
 835         }
 836
 837         /*
 838          * A Connect Ack with Choke or timeout or failed routing will go to
 839          * closed.
 840          */
 841         if (sk->sk_state == TCP_SYN_SENT) {
 842                 DEFINE_WAIT(wait);
 843
 844                 for (;;) {
 845                         prepare_to_wait(sk->sk_sleep, &wait,
 846                                         TASK_INTERRUPTIBLE);
 847                         if (sk->sk_state != TCP_SYN_SENT)
 848                                 break;
 849                         if (!signal_pending(current)) {
 850                                 release_sock(sk);
 851                                 schedule();
 852                                 lock_sock(sk);
 853                                 continue;
 854                         }
 855                         err = -ERESTARTSYS;
 856                         break;
 857                 }
 858                 finish_wait(sk->sk_sleep, &wait);
 859
 860                 if (err)
 861                         goto out_release;
 862         }
 863
 864         if (sk->sk_state != TCP_ESTABLISHED) {
 865         /* Try next neighbour */
 866                 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause, &diagnostic, 0);
 867                 if (rose->neighbour)
 868                         goto rose_try_next_neigh;
 869
 870                 /* No more neighbours */
 871                 sock->state = SS_UNCONNECTED;
 872                 err = sock_error(sk);   /* Always set at this point */
 873                 goto out_release;
 874         }
 875
 876         sock->state = SS_CONNECTED;
 877
 878 out_release:
 879         release_sock(sk);
 880
 881         return err;
 882 }
 883
 884 static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
 885 {
 886         struct sk_buff *skb;
 887         struct sock *newsk;
 888         DEFINE_WAIT(wait);
 889         struct sock *sk;
 890         int err = 0;
 891
 892         if ((sk = sock->sk) == NULL)
 893                 return -EINVAL;
 894
 895         lock_sock(sk);
 896         if (sk->sk_type != SOCK_SEQPACKET) {
 897                 err = -EOPNOTSUPP;
 898                 goto out_release;
 899         }
 900
 901         if (sk->sk_state != TCP_LISTEN) {
 902                 err = -EINVAL;
 903                 goto out_release;
 904         }
 905
 906         /*
 907          *      The write queue this time is holding sockets ready to use
 908          *      hooked into the SABM we saved
 909          */
 910         for (;;) {
 911                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 912
 913                 skb = skb_dequeue(&sk->sk_receive_queue);
 914                 if (skb)
 915                         break;
 916
 917                 if (flags & O_NONBLOCK) {
 918                         err = -EWOULDBLOCK;
 919                         break;
 920                 }
 921                 if (!signal_pending(current)) {
 922                         release_sock(sk);
 923                         schedule();
 924                         lock_sock(sk);
 925                         continue;
 926                 }
 927                 err = -ERESTARTSYS;
 928                 break;
 929         }
 930         finish_wait(sk->sk_sleep, &wait);
 931         if (err)
 932                 goto out_release;
 933
 934         newsk = skb->sk;
 935         sock_graft(newsk, newsock);
 936
 937         /* Now attach up the new socket */
 938         skb->sk = NULL;
 939         kfree_skb(skb);
 940         sk->sk_ack_backlog--;
 941
 942 out_release:
 943         release_sock(sk);
 944
 945         return err;
 946 }
 947
 948 static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
 949         int *uaddr_len, int peer)
 950 {
 951         struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
 952         struct sock *sk = sock->sk;
 953         struct rose_sock *rose = rose_sk(sk);
 954         int n;
 955
 956         if (peer != 0) {
 957                 if (sk->sk_state != TCP_ESTABLISHED)
 958                         return -ENOTCONN;
 959                 srose->srose_family = AF_ROSE;
 960                 srose->srose_addr   = rose->dest_addr;
 961                 srose->srose_call   = rose->dest_call;
 962                 srose->srose_ndigis = rose->dest_ndigis;
 963                 for (n = 0; n < rose->dest_ndigis; n++)
 964                         srose->srose_digis[n] = rose->dest_digis[n];
 965         } else {
 966                 srose->srose_family = AF_ROSE;
 967                 srose->srose_addr   = rose->source_addr;
 968                 srose->srose_call   = rose->source_call;
 969                 srose->srose_ndigis = rose->source_ndigis;
 970                 for (n = 0; n < rose->source_ndigis; n++)
 971                         srose->srose_digis[n] = rose->source_digis[n];
 972         }
 973
 974         *uaddr_len = sizeof(struct full_sockaddr_rose);
 975         return 0;
 976 }
 977
 978 int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
 979 {
 980         struct sock *sk;
 981         struct sock *make;
 982         struct rose_sock *make_rose;
 983         struct rose_facilities_struct facilities;
 984         int n, len;
 985
 986         skb->sk = NULL;         /* Initially we don't know who it's for */
 987
 988         /*
 989          *      skb->data points to the rose frame start
 990          */
 991         memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
 992
 993         len  = (((skb->data[3] >> 4) & 0x0F) + 1) >> 1;
 994         len += (((skb->data[3] >> 0) & 0x0F) + 1) >> 1;
 995         if (!rose_parse_facilities(skb->data + len + 4, &facilities)) {
 996                 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
 997                 return 0;
 998         }
 999
1000         sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
1001
1002         /*
1003          * We can't accept the Call Request.
1004          */
1005         if (sk == NULL || sk_acceptq_is_full(sk) ||
1006             (make = rose_make_new(sk)) == NULL) {
1007                 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
1008                 return 0;
1009         }
1010
1011         skb->sk     = make;
1012         make->sk_state = TCP_ESTABLISHED;
1013         make_rose = rose_sk(make);
1014
1015         make_rose->lci           = lci;
1016         make_rose->dest_addr     = facilities.dest_addr;
1017         make_rose->dest_call     = facilities.dest_call;
1018         make_rose->dest_ndigis   = facilities.dest_ndigis;
1019         for (n = 0 ; n < facilities.dest_ndigis ; n++)
1020                 make_rose->dest_digis[n] = facilities.dest_digis[n];
1021         make_rose->source_addr   = facilities.source_addr;
1022         make_rose->source_call   = facilities.source_call;
1023         make_rose->source_ndigis = facilities.source_ndigis;
1024         for (n = 0 ; n < facilities.source_ndigis ; n++)
1025                 make_rose->source_digis[n]= facilities.source_digis[n];
1026         make_rose->neighbour     = neigh;
1027         make_rose->device        = dev;
1028         make_rose->facilities    = facilities;
1029
1030         make_rose->neighbour->use++;
1031
1032         if (rose_sk(sk)->defer) {
1033                 make_rose->state = ROSE_STATE_5;
1034         } else {
1035                 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1036                 make_rose->state = ROSE_STATE_3;
1037                 rose_start_idletimer(make);
1038         }
1039
1040         make_rose->condition = 0x00;
1041         make_rose->vs        = 0;
1042         make_rose->va        = 0;
1043         make_rose->vr        = 0;
1044         make_rose->vl        = 0;
1045         sk->sk_ack_backlog++;
1046
1047         rose_insert_socket(make);
1048
1049         skb_queue_head(&sk->sk_receive_queue, skb);
1050
1051         rose_start_heartbeat(make);
1052
1053         if (!sock_flag(sk, SOCK_DEAD))
1054                 sk->sk_data_ready(sk, skb->len);
1055
1056         return 1;
1057 }
1058
1059 static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
1060                         struct msghdr *msg, size_t len)
1061 {
1062         struct sock *sk = sock->sk;
1063         struct rose_sock *rose = rose_sk(sk);
1064         struct sockaddr_rose *usrose = (struct sockaddr_rose *)msg->msg_name;
1065         int err;
1066         struct full_sockaddr_rose srose;
1067         struct sk_buff *skb;
1068         unsigned char *asmptr;
1069         int n, size, qbit = 0;
1070
1071         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1072                 return -EINVAL;
1073
1074         if (sock_flag(sk, SOCK_ZAPPED))
1075                 return -EADDRNOTAVAIL;
1076
1077         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1078                 send_sig(SIGPIPE, current, 0);
1079                 return -EPIPE;
1080         }
1081
1082         if (rose->neighbour == NULL || rose->device == NULL)
1083                 return -ENETUNREACH;
1084
1085         if (usrose != NULL) {
1086                 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1087                         return -EINVAL;
1088                 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1089                 memcpy(&srose, usrose, msg->msg_namelen);
1090                 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1091                     ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1092                         return -EISCONN;
1093                 if (srose.srose_ndigis != rose->dest_ndigis)
1094                         return -EISCONN;
1095                 if (srose.srose_ndigis == rose->dest_ndigis) {
1096                         for (n = 0 ; n < srose.srose_ndigis ; n++)
1097                                 if (ax25cmp(&rose->dest_digis[n],
1098                                             &srose.srose_digis[n]))
1099                                         return -EISCONN;
1100                 }
1101                 if (srose.srose_family != AF_ROSE)
1102                         return -EINVAL;
1103         } else {
1104                 if (sk->sk_state != TCP_ESTABLISHED)
1105                         return -ENOTCONN;
1106
1107                 srose.srose_family = AF_ROSE;
1108                 srose.srose_addr   = rose->dest_addr;
1109                 srose.srose_call   = rose->dest_call;
1110                 srose.srose_ndigis = rose->dest_ndigis;
1111                 for (n = 0 ; n < rose->dest_ndigis ; n++)
1112                         srose.srose_digis[n] = rose->dest_digis[n];
1113         }
1114
1115         SOCK_DEBUG(sk, "ROSE: sendto: Addresses built.\n");
1116
1117         /* Build a packet */
1118         SOCK_DEBUG(sk, "ROSE: sendto: building packet.\n");
1119         size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1120
1121         if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1122                 return err;
1123
1124         skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1125
1126         /*
1127          *      Put the data on the end
1128          */
1129         SOCK_DEBUG(sk, "ROSE: Appending user data\n");
1130
1131         skb_reset_transport_header(skb);
1132         skb_put(skb, len);
1133
1134         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1135         if (err) {
1136                 kfree_skb(skb);
1137                 return err;
1138         }
1139
1140         /*
1141          *      If the Q BIT Include socket option is in force, the first
1142          *      byte of the user data is the logical value of the Q Bit.
1143          */
1144         if (rose->qbitincl) {
1145                 qbit = skb->data[0];
1146                 skb_pull(skb, 1);
1147         }
1148
1149         /*
1150          *      Push down the ROSE header
1151          */
1152         asmptr = skb_push(skb, ROSE_MIN_LEN);
1153
1154         SOCK_DEBUG(sk, "ROSE: Building Network Header.\n");
1155
1156         /* Build a ROSE Network header */
1157         asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1158         asmptr[1] = (rose->lci >> 0) & 0xFF;
1159         asmptr[2] = ROSE_DATA;
1160
1161         if (qbit)
1162                 asmptr[0] |= ROSE_Q_BIT;
1163
1164         SOCK_DEBUG(sk, "ROSE: Built header.\n");
1165
1166         SOCK_DEBUG(sk, "ROSE: Transmitting buffer\n");
1167
1168         if (sk->sk_state != TCP_ESTABLISHED) {
1169                 kfree_skb(skb);
1170                 return -ENOTCONN;
1171         }
1172
1173 #ifdef M_BIT
1174 #define ROSE_PACLEN (256-ROSE_MIN_LEN)
1175         if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1176                 unsigned char header[ROSE_MIN_LEN];
1177                 struct sk_buff *skbn;
1178                 int frontlen;
1179                 int lg;
1180
1181                 /* Save a copy of the Header */
1182                 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1183                 skb_pull(skb, ROSE_MIN_LEN);
1184
1185                 frontlen = skb_headroom(skb);
1186
1187                 while (skb->len > 0) {
1188                         if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1189                                 kfree_skb(skb);
1190                                 return err;
1191                         }
1192
1193                         skbn->sk   = sk;
1194                         skbn->free = 1;
1195                         skbn->arp  = 1;
1196
1197                         skb_reserve(skbn, frontlen);
1198
1199                         lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1200
1201                         /* Copy the user data */
1202                         skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1203                         skb_pull(skb, lg);
1204
1205                         /* Duplicate the Header */
1206                         skb_push(skbn, ROSE_MIN_LEN);
1207                         skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1208
1209                         if (skb->len > 0)
1210                                 skbn->data[2] |= M_BIT;
1211
1212                         skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1213                 }
1214
1215                 skb->free = 1;
1216                 kfree_skb(skb);
1217         } else {
1218                 skb_queue_tail(&sk->sk_write_queue, skb);               /* Throw it on the queue */
1219         }
1220 #else
1221         skb_queue_tail(&sk->sk_write_queue, skb);       /* Shove it onto the queue */
1222 #endif
1223
1224         rose_kick(sk);
1225
1226         return len;
1227 }
1228
1229
1230 static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
1231                         struct msghdr *msg, size_t size, int flags)
1232 {
1233         struct sock *sk = sock->sk;
1234         struct rose_sock *rose = rose_sk(sk);
1235         struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
1236         size_t copied;
1237         unsigned char *asmptr;
1238         struct sk_buff *skb;
1239         int n, er, qbit;
1240
1241         /*
1242          * This works for seqpacket too. The receiver has ordered the queue for
1243          * us! We do one quick check first though
1244          */
1245         if (sk->sk_state != TCP_ESTABLISHED)
1246                 return -ENOTCONN;
1247
1248         /* Now we can treat all alike */
1249         if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1250                 return er;
1251
1252         qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1253
1254         skb_pull(skb, ROSE_MIN_LEN);
1255
1256         if (rose->qbitincl) {
1257                 asmptr  = skb_push(skb, 1);
1258                 *asmptr = qbit;
1259         }
1260
1261         skb_reset_transport_header(skb);
1262         copied     = skb->len;
1263
1264         if (copied > size) {
1265                 copied = size;
1266                 msg->msg_flags |= MSG_TRUNC;
1267         }
1268
1269         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1270
1271         if (srose != NULL) {
1272                 srose->srose_family = AF_ROSE;
1273                 srose->srose_addr   = rose->dest_addr;
1274                 srose->srose_call   = rose->dest_call;
1275                 srose->srose_ndigis = rose->dest_ndigis;
1276                 if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
1277                         struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
1278                         for (n = 0 ; n < rose->dest_ndigis ; n++)
1279                                 full_srose->srose_digis[n] = rose->dest_digis[n];
1280                         msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1281                 } else {
1282                         if (rose->dest_ndigis >= 1) {
1283                                 srose->srose_ndigis = 1;
1284                                 srose->srose_digi = rose->dest_digis[0];
1285                         }
1286                         msg->msg_namelen = sizeof(struct sockaddr_rose);
1287                 }
1288         }
1289
1290         skb_free_datagram(sk, skb);
1291
1292         return copied;
1293 }
1294
1295
1296 static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1297 {
1298         struct sock *sk = sock->sk;
1299         struct rose_sock *rose = rose_sk(sk);
1300         void __user *argp = (void __user *)arg;
1301
1302         switch (cmd) {
1303         case TIOCOUTQ: {
1304                 long amount;
1305                 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1306                 if (amount < 0)
1307                         amount = 0;
1308                 return put_user(amount, (unsigned int __user *) argp);
1309         }
1310
1311         case TIOCINQ: {
1312                 struct sk_buff *skb;
1313                 long amount = 0L;
1314                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1315                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1316                         amount = skb->len;
1317                 return put_user(amount, (unsigned int __user *) argp);
1318         }
1319
1320         case SIOCGSTAMP:
1321                 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1322
1323         case SIOCGSTAMPNS:
1324                 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1325
1326         case SIOCGIFADDR:
1327         case SIOCSIFADDR:
1328         case SIOCGIFDSTADDR:
1329         case SIOCSIFDSTADDR:
1330         case SIOCGIFBRDADDR:
1331         case SIOCSIFBRDADDR:
1332         case SIOCGIFNETMASK:
1333         case SIOCSIFNETMASK:
1334         case SIOCGIFMETRIC:
1335         case SIOCSIFMETRIC:
1336                 return -EINVAL;
1337
1338         case SIOCADDRT:
1339         case SIOCDELRT:
1340         case SIOCRSCLRRT:
1341                 if (!capable(CAP_NET_ADMIN))
1342                         return -EPERM;
1343                 return rose_rt_ioctl(cmd, argp);
1344
1345         case SIOCRSGCAUSE: {
1346                 struct rose_cause_struct rose_cause;
1347                 rose_cause.cause      = rose->cause;
1348                 rose_cause.diagnostic = rose->diagnostic;
1349                 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1350         }
1351
1352         case SIOCRSSCAUSE: {
1353                 struct rose_cause_struct rose_cause;
1354                 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1355                         return -EFAULT;
1356                 rose->cause      = rose_cause.cause;
1357                 rose->diagnostic = rose_cause.diagnostic;
1358                 return 0;
1359         }
1360
1361         case SIOCRSSL2CALL:
1362                 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1363                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1364                         ax25_listen_release(&rose_callsign, NULL);
1365                 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1366                         return -EFAULT;
1367                 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1368                         return ax25_listen_register(&rose_callsign, NULL);
1369
1370                 return 0;
1371
1372         case SIOCRSGL2CALL:
1373                 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1374
1375         case SIOCRSACCEPT:
1376                 if (rose->state == ROSE_STATE_5) {
1377                         rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1378                         rose_start_idletimer(sk);
1379                         rose->condition = 0x00;
1380                         rose->vs        = 0;
1381                         rose->va        = 0;
1382                         rose->vr        = 0;
1383                         rose->vl        = 0;
1384                         rose->state     = ROSE_STATE_3;
1385                 }
1386                 return 0;
1387
1388         default:
1389                 return -ENOIOCTLCMD;
1390         }
1391
1392         return 0;
1393 }
1394
1395 #ifdef CONFIG_PROC_FS
1396 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
1397         __acquires(rose_list_lock)
1398 {
1399         int i;
1400         struct sock *s;
1401         struct hlist_node *node;
1402
1403         spin_lock_bh(&rose_list_lock);
1404         if (*pos == 0)
1405                 return SEQ_START_TOKEN;
1406
1407         i = 1;
1408         sk_for_each(s, node, &rose_list) {
1409                 if (i == *pos)
1410                         return s;
1411                 ++i;
1412         }
1413         return NULL;
1414 }
1415
1416 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1417 {
1418         ++*pos;
1419
1420         return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
1421                 : sk_next((struct sock *)v);
1422 }
1423
1424 static void rose_info_stop(struct seq_file *seq, void *v)
1425         __releases(rose_list_lock)
1426 {
1427         spin_unlock_bh(&rose_list_lock);
1428 }
1429
1430 static int rose_info_show(struct seq_file *seq, void *v)
1431 {
1432         char buf[11];
1433
1434         if (v == SEQ_START_TOKEN)
1435                 seq_puts(seq,
1436                          "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");
1437
1438         else {
1439                 struct sock *s = v;
1440                 struct rose_sock *rose = rose_sk(s);
1441                 const char *devname, *callsign;
1442                 const struct net_device *dev = rose->device;
1443
1444                 if (!dev)
1445                         devname = "???";
1446                 else
1447                         devname = dev->name;
1448
1449                 seq_printf(seq, "%-10s %-9s ",
1450                         rose2asc(&rose->dest_addr),
1451                         ax2asc(buf, &rose->dest_call));
1452
1453                 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1454                         callsign = "??????-?";
1455                 else
1456                         callsign = ax2asc(buf, &rose->source_call);
1457
1458                 seq_printf(seq,
1459                            "%-10s %-9s %-5s %3.3X %05d  %d  %d  %d  %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
1460                         rose2asc(&rose->source_addr),
1461                         callsign,
1462                         devname,
1463                         rose->lci & 0x0FFF,
1464                         (rose->neighbour) ? rose->neighbour->number : 0,
1465                         rose->state,
1466                         rose->vs,
1467                         rose->vr,
1468                         rose->va,
1469                         ax25_display_timer(&rose->timer) / HZ,
1470                         rose->t1 / HZ,
1471                         rose->t2 / HZ,
1472                         rose->t3 / HZ,
1473                         rose->hb / HZ,
1474                         ax25_display_timer(&rose->idletimer) / (60 * HZ),
1475                         rose->idle / (60 * HZ),
1476                         atomic_read(&s->sk_wmem_alloc),
1477                         atomic_read(&s->sk_rmem_alloc),
1478                         s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1479         }
1480
1481         return 0;
1482 }
1483
1484 static const struct seq_operations rose_info_seqops = {
1485         .start = rose_info_start,
1486         .next = rose_info_next,
1487         .stop = rose_info_stop,
1488         .show = rose_info_show,
1489 };
1490
1491 static int rose_info_open(struct inode *inode, struct file *file)
1492 {
1493         return seq_open(file, &rose_info_seqops);
1494 }
1495
1496 static const struct file_operations rose_info_fops = {
1497         .owner = THIS_MODULE,
1498         .open = rose_info_open,
1499         .read = seq_read,
1500         .llseek = seq_lseek,
1501         .release = seq_release,
1502 };
1503 #endif  /* CONFIG_PROC_FS */
1504
1505 static struct net_proto_family rose_family_ops = {
1506         .family         =       PF_ROSE,
1507         .create         =       rose_create,
1508         .owner          =       THIS_MODULE,
1509 };
1510
1511 static struct proto_ops rose_proto_ops = {
1512         .family         =       PF_ROSE,
1513         .owner          =       THIS_MODULE,
1514         .release        =       rose_release,
1515         .bind           =       rose_bind,
1516         .connect        =       rose_connect,
1517         .socketpair     =       sock_no_socketpair,
1518         .accept         =       rose_accept,
1519         .getname        =       rose_getname,
1520         .poll           =       datagram_poll,
1521         .ioctl          =       rose_ioctl,
1522         .listen         =       rose_listen,
1523         .shutdown       =       sock_no_shutdown,
1524         .setsockopt     =       rose_setsockopt,
1525         .getsockopt     =       rose_getsockopt,
1526         .sendmsg        =       rose_sendmsg,
1527         .recvmsg        =       rose_recvmsg,
1528         .mmap           =       sock_no_mmap,
1529         .sendpage       =       sock_no_sendpage,
1530 };
1531
1532 static struct notifier_block rose_dev_notifier = {
1533         .notifier_call  =       rose_device_event,
1534 };
1535
1536 static struct net_device **dev_rose;
1537
1538 static struct ax25_protocol rose_pid = {
1539         .pid    = AX25_P_ROSE,
1540         .func   = rose_route_frame
1541 };
1542
1543 static struct ax25_linkfail rose_linkfail_notifier = {
1544         .func   = rose_link_failed
1545 };
1546
1547 static int __init rose_proto_init(void)
1548 {
1549         int i;
1550         int rc;
1551
1552         if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1553                 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1554                 rc = -EINVAL;
1555                 goto out;
1556         }
1557
1558         rc = proto_register(&rose_proto, 0);
1559         if (rc != 0)
1560                 goto out;
1561
1562         rose_callsign = null_ax25_address;
1563
1564         dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1565         if (dev_rose == NULL) {
1566                 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
1567                 rc = -ENOMEM;
1568                 goto out_proto_unregister;
1569         }
1570
1571         for (i = 0; i < rose_ndevs; i++) {
1572                 struct net_device *dev;
1573                 char name[IFNAMSIZ];
1574
1575                 sprintf(name, "rose%d", i);
1576                 dev = alloc_netdev(sizeof(struct net_device_stats),
1577                                    name, rose_setup);
1578                 if (!dev) {
1579                         printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
1580                         rc = -ENOMEM;
1581                         goto fail;
1582                 }
1583                 rc = register_netdev(dev);
1584                 if (rc) {
1585                         printk(KERN_ERR "ROSE: netdevice registration failed\n");
1586                         free_netdev(dev);
1587                         goto fail;
1588                 }
1589                 rose_set_lockdep_key(dev);
1590                 dev_rose[i] = dev;
1591         }
1592
1593         sock_register(&rose_family_ops);
1594         register_netdevice_notifier(&rose_dev_notifier);
1595
1596         ax25_register_pid(&rose_pid);
1597         ax25_linkfail_register(&rose_linkfail_notifier);
1598
1599 #ifdef CONFIG_SYSCTL
1600         rose_register_sysctl();
1601 #endif
1602         rose_loopback_init();
1603
1604         rose_add_loopback_neigh();
1605
1606         proc_net_fops_create(&init_net, "rose", S_IRUGO, &rose_info_fops);
1607         proc_net_fops_create(&init_net, "rose_neigh", S_IRUGO, &rose_neigh_fops);
1608         proc_net_fops_create(&init_net, "rose_nodes", S_IRUGO, &rose_nodes_fops);
1609         proc_net_fops_create(&init_net, "rose_routes", S_IRUGO, &rose_routes_fops);
1610 out:
1611         return rc;
1612 fail:
1613         while (--i >= 0) {
1614                 unregister_netdev(dev_rose[i]);
1615                 free_netdev(dev_rose[i]);
1616         }
1617         kfree(dev_rose);
1618 out_proto_unregister:
1619         proto_unregister(&rose_proto);
1620         goto out;
1621 }
1622 module_init(rose_proto_init);
1623
1624 module_param(rose_ndevs, int, 0);
1625 MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1626
1627 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1628 MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1629 MODULE_LICENSE("GPL");
1630 MODULE_ALIAS_NETPROTO(PF_ROSE);
1631
1632 static void __exit rose_exit(void)
1633 {
1634         int i;
1635
1636         proc_net_remove(&init_net, "rose");
1637         proc_net_remove(&init_net, "rose_neigh");
1638         proc_net_remove(&init_net, "rose_nodes");
1639         proc_net_remove(&init_net, "rose_routes");
1640         rose_loopback_clear();
1641
1642         rose_rt_free();
1643
1644         ax25_protocol_release(AX25_P_ROSE);
1645         ax25_linkfail_release(&rose_linkfail_notifier);
1646
1647         if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1648                 ax25_listen_release(&rose_callsign, NULL);
1649
1650 #ifdef CONFIG_SYSCTL
1651         rose_unregister_sysctl();
1652 #endif
1653         unregister_netdevice_notifier(&rose_dev_notifier);
1654
1655         sock_unregister(PF_ROSE);
1656
1657         for (i = 0; i < rose_ndevs; i++) {
1658                 struct net_device *dev = dev_rose[i];
1659
1660                 if (dev) {
1661                         unregister_netdev(dev);
1662                         free_netdev(dev);
1663                 }
1664         }
1665
1666         kfree(dev_rose);
1667         proto_unregister(&rose_proto);
1668 }
1669
1670 module_exit(rose_exit);